dns_client: avoid disconnect with server after query complete

fix  Download/default is missing the FILE field..  Stop. error on openwrt

.clang-format

@@ -1,9 +1,10 @@
-#http://clang.llvm.org/docs/ClangFormatStyleOptions.html
-
-BasedOnStyle: LLVM
-IndentWidth: 4
-TabWidth: 4
-UseTab: ForContinuationAndIndentation
-MaxEmptyLinesToKeep: 1
-AllowShortFunctionsOnASingleLine: Empty
-BreakBeforeBraces: Linux
+#http://clang.llvm.org/docs/ClangFormatStyleOptions.html
+
+BasedOnStyle: LLVM
+IndentWidth: 4
+TabWidth: 4
+UseTab: ForContinuationAndIndentation
+MaxEmptyLinesToKeep: 1
+AllowShortFunctionsOnASingleLine: Empty
+BreakBeforeBraces: Linux
+ColumnLimit: 120

.github/ISSUE_TEMPLATE/feature.md

@@ -0,0 +1,20 @@
+---
+name: 需求建议
+about: 需求建议描述
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**需求应用场景**
+请描述需求应用的场景和方式。
+
+**建议的方案**
+实现上述场景建议的方案。
+
+**设备信息**
+1. 设备信息（CPU，厂家）  
+
+2. 固件信息
+

.github/ISSUE_TEMPLATE/issue.md

@@ -0,0 +1,29 @@
+---
+name: 问题报告
+about: 问题现象描述
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**问题现象**  
+简要描述问题出现的现象
+
+**运行环境**
+1. 固件型号  
+
+2. 运营商  
+
+**重现步骤**
+1. 上游DNS配置。  
+
+2. 访问的域名。  
+
+
+**信息收集**  
+1. 将/var/log/smrtdns.log日志作为附件上传。  
+2. 如进程异常，请将coredump功能开启，上传coredump信息文件。  
+在自定义界面，开启设置->自定义设置->生成coredump配置，重现问题后提交coredump文件
+coredump文件在/tmp目录下
+

Dockerfile

@@ -0,0 +1,18 @@
+ FROM debian:buster-slim
+
+ RUN apt update && \
+     apt install -y git make gcc libssl-dev && \
+     git clone https://github.com/pymumu/smartdns.git --depth 1 && \
+     cd smartdns && \
+     sh ./package/build-pkg.sh --platform debian --arch `dpkg --print-architecture` && \
+     dpkg -i package/*.deb && \
+     cd / && \
+     rm -rf smartdns/ && \
+     apt autoremove -y git make gcc libssl-dev && \
+     apt clean && \
+     rm -rf /var/lib/apt/lists/*
+
+ EXPOSE 53/udp
+ VOLUME "/etc/smartdns/"
+
+ CMD ["/usr/sbin/smartdns", "-f"]

LICENSE

@@ -1,21 +1,23 @@
-                    GNU AFFERO GENERAL PUBLIC LICENSE
-                       Version 3, 19 November 2007
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
                             Preamble
 
-  The GNU Affero General Public License is a free, copyleft license for
-software and other kinds of works, specifically designed to ensure
-cooperation with the community in the case of network server software.
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
 
   The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works.  By contrast,
-our General Public Licenses are intended to guarantee your freedom to
+the GNU General Public License is intended to guarantee your freedom to
 share and change all versions of a program--to make sure it remains free
-software for all its users.
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
 
   When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
@@ -24,34 +26,44 @@ them if you wish), that you receive source code or can get it if you
 want it, that you can change the software or use pieces of it in new
 free programs, and that you know you can do these things.
 
-  Developers that use our General Public Licenses protect your rights
-with two steps: (1) assert copyright on the software, and (2) offer
-you this License which gives you legal permission to copy, distribute
-and/or modify the software.
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
 
-  A secondary benefit of defending all users' freedom is that
-improvements made in alternate versions of the program, if they
-receive widespread use, become available for other developers to
-incorporate.  Many developers of free software are heartened and
-encouraged by the resulting cooperation.  However, in the case of
-software used on network servers, this result may fail to come about.
-The GNU General Public License permits making a modified version and
-letting the public access it on a server without ever releasing its
-source code to the public.
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
 
-  The GNU Affero General Public License is designed specifically to
-ensure that, in such cases, the modified source code becomes available
-to the community.  It requires the operator of a network server to
-provide the source code of the modified version running there to the
-users of that server.  Therefore, public use of a modified version, on
-a publicly accessible server, gives the public access to the source
-code of the modified version.
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
 
-  An older license, called the Affero General Public License and
-published by Affero, was designed to accomplish similar goals.  This is
-a different license, not a version of the Affero GPL, but Affero has
-released a new version of the Affero GPL which permits relicensing under
-this license.
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
 
   The precise terms and conditions for copying, distribution and
 modification follow.
@@ -60,7 +72,7 @@ modification follow.
 
   0. Definitions.
 
-  "This License" refers to version 3 of the GNU Affero General Public License.
+  "This License" refers to version 3 of the GNU General Public License.
 
   "Copyright" also means copyright-like laws that apply to other kinds of
 works, such as semiconductor masks.
@@ -537,45 +549,35 @@ to collect a royalty for further conveying from those to whom you convey
 the Program, the only way you could satisfy both those terms and this
 License would be to refrain entirely from conveying the Program.
 
-  13. Remote Network Interaction; Use with the GNU General Public License.
-
-  Notwithstanding any other provision of this License, if you modify the
-Program, your modified version must prominently offer all users
-interacting with it remotely through a computer network (if your version
-supports such interaction) an opportunity to receive the Corresponding
-Source of your version by providing access to the Corresponding Source
-from a network server at no charge, through some standard or customary
-means of facilitating copying of software.  This Corresponding Source
-shall include the Corresponding Source for any work covered by version 3
-of the GNU General Public License that is incorporated pursuant to the
-following paragraph.
+  13. Use with the GNU Affero General Public License.
 
   Notwithstanding any other provision of this License, you have
 permission to link or combine any covered work with a work licensed
-under version 3 of the GNU General Public License into a single
+under version 3 of the GNU Affero General Public License into a single
 combined work, and to convey the resulting work.  The terms of this
 License will continue to apply to the part which is the covered work,
-but the work with which it is combined will remain governed by version
-3 of the GNU General Public License.
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
 
   14. Revised Versions of this License.
 
   The Free Software Foundation may publish revised and/or new versions of
-the GNU Affero General Public License from time to time.  Such new versions
-will be similar in spirit to the present version, but may differ in detail to
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
 
   Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU Affero General
+Program specifies that a certain numbered version of the GNU General
 Public License "or any later version" applies to it, you have the
 option of following the terms and conditions either of that numbered
 version or of any later version published by the Free Software
 Foundation.  If the Program does not specify a version number of the
-GNU Affero General Public License, you may choose any version ever published
+GNU General Public License, you may choose any version ever published
 by the Free Software Foundation.
 
   If the Program specifies that a proxy can decide which future
-versions of the GNU Affero General Public License can be used, that proxy's
+versions of the GNU General Public License can be used, that proxy's
 public statement of acceptance of a version permanently authorizes you
 to choose that version for the Program.
 
@@ -633,29 +635,40 @@ the "copyright" line and a pointer to where the full notice is found.
     Copyright (C) <year>  <name of author>
 
     This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU Affero General Public License as published
-    by the Free Software Foundation, either version 3 of the License, or
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Affero General Public License for more details.
+    GNU General Public License for more details.
 
-    You should have received a copy of the GNU Affero General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
-  If your software can interact with users remotely through a computer
-network, you should also make sure that it provides a way for users to
-get its source.  For example, if your program is a web application, its
-interface could display a "Source" link that leads users to an archive
-of the code.  There are many ways you could offer source, and different
-solutions will be better for different programs; see section 13 for the
-specific requirements.
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
 
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU AGPL, see
-<http://www.gnu.org/licenses/>.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

Makefile

@@ -0,0 +1,47 @@
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+PKG_CONFIG := pkg-config
+DESTDIR :=
+PREFIX := /usr
+SBINDIR := $(PREFIX)/sbin
+SYSCONFDIR := /etc
+RUNSTATEDIR := /var/run
+SYSTEMDSYSTEMUNITDIR := $(shell ${PKG_CONFIG} --variable=systemdsystemunitdir systemd)
+SMARTDNS_SYSTEMD = systemd/smartdns.service
+
+.PHONY: all clean install SMARTDNS_BIN
+all: SMARTDNS_BIN 
+
+SMARTDNS_BIN: $(SMARTDNS_SYSTEMD)
+	$(MAKE) $(MFLAGS) -C src all 
+
+$(SMARTDNS_SYSTEMD): systemd/smartdns.service.in
+	cp $< $@
+	sed -i 's|@SBINDIR@|$(SBINDIR)|' $@
+	sed -i 's|@SYSCONFDIR@|$(SYSCONFDIR)|' $@
+	sed -i 's|@RUNSTATEDIR@|$(RUNSTATEDIR)|' $@
+
+clean:
+	$(MAKE) $(MFLAGS) -C src clean  
+	$(RM) $(SMARTDNS_SYSTEMD)
+
+install: SMARTDNS_BIN 
+	install -v -m 0640 -D -t $(DESTDIR)$(SYSCONFDIR)/default etc/default/smartdns
+	install -v -m 0755 -D -t $(DESTDIR)$(SYSCONFDIR)/init.d etc/init.d/smartdns
+	install -v -m 0640 -D -t $(DESTDIR)$(SYSCONFDIR)/smartdns etc/smartdns/smartdns.conf
+	install -v -m 0755 -D -t $(DESTDIR)$(SBINDIR) src/smartdns
+	install -v -m 0644 -D -t $(DESTDIR)$(SYSTEMDSYSTEMUNITDIR) systemd/smartdns.service
+

ReadMe_en.md

@@ -0,0 +1,668 @@
+# SmartDNS
+
+![SmartDNS](doc/smartdns-banner.png)  
+SmartDNS is a local DNS server. SmartDNS accepts DNS query requests from local clients, obtains DNS query results from multiple upstream DNS servers, and returns the fastest access results to clients.  
+Avoiding DNS pollution and improving network access speed, supports high-performance ad filtering.  
+Unlike dnsmasq's all-servers, smartdns returns the fastest access resolution. （[read more](#faq)）
+
+Support Raspberry Pi, openwrt, ASUS router, Windows and other devices.  
+
+## Table Of Content
+
+1. [Software Show](#software-show)
+1. [Features](#features)
+1. [Architecture](#architecture)
+1. [Usage](#usage)  
+    1. [Download the package](#download-the-package)
+    1. [Standard Linux system installation/Raspberry Pi, X86_64 system](#standard-linux-system-installation/raspberry-pi,-x86_64-system)
+    1. [openwrt/LEDE](#openwrt/lede)
+    1. [ASUS router native firmware / Merlin firmware](#asus-router-native-firmware-/-merlin-firmware)
+    1. [optware/entware](#optware/entware)
+    1. [Windows 10 WSL Installation/WSL ubuntu](#windows-10-wsl-installation/wsl-ubuntu)
+1. [Configuration parameter](#configuration-parameter)
+1. [Donate](#Donate)
+1. [FAQ](#FAQ)
+
+## Software Show
+
+**Ali DNS**  
+Use Ali DNS to query Baidu's IP and test the results.  
+
+```shell
+pi@raspberrypi:~/code/smartdns_build $ nslookup www.baidu.com 223.5.5.5
+Server:         223.5.5.5
+Address:        223.5.5.5#53
+
+Non-authoritative answer:
+www.baidu.com   canonical name = www.a.shifen.com.
+Name:   www.a.shifen.com
+Address: 180.97.33.108
+Name:   www.a.shifen.com
+Address: 180.97.33.107
+
+pi@raspberrypi:~/code/smartdns_build $ ping 180.97.33.107 -c 2
+PING 180.97.33.107 (180.97.33.107) 56(84) bytes of data.
+64 bytes from 180.97.33.107: icmp_seq=1 ttl=55 time=24.3 ms
+64 bytes from 180.97.33.107: icmp_seq=2 ttl=55 time=24.2 ms
+
+--- 180.97.33.107 ping statistics ---
+2 packets transmitted, 2 received, 0% packet loss, time 1001ms
+rtt min/avg/max/mdev = 24.275/24.327/24.380/0.164 ms
+pi@raspberrypi:~/code/smartdns_build $ ping 180.97.33.108 -c 2
+PING 180.97.33.108 (180.97.33.108) 56(84) bytes of data.
+64 bytes from 180.97.33.108: icmp_seq=1 ttl=55 time=31.1 ms
+64 bytes from 180.97.33.108: icmp_seq=2 ttl=55 time=31.0 ms
+
+--- 180.97.33.108 ping statistics ---
+2 packets transmitted, 2 received, 0% packet loss, time 1001ms
+rtt min/avg/max/mdev = 31.014/31.094/31.175/0.193 ms
+```
+
+**smartdns**  
+Use SmartDNS to query Baidu IP and test the results.
+
+```shell
+pi@raspberrypi:~/code/smartdns_build $ nslookup www.baidu.com
+Server:         192.168.1.1
+Address:        192.168.1.1#53
+
+Non-authoritative answer:
+www.baidu.com   canonical name = www.a.shifen.com.
+Name:   www.a.shifen.com
+Address: 14.215.177.39
+
+pi@raspberrypi:~/code/smartdns_build $ ping 14.215.177.39 -c 2
+PING 14.215.177.39 (14.215.177.39) 56(84) bytes of data.
+64 bytes from 14.215.177.39: icmp_seq=1 ttl=56 time=6.31 ms
+64 bytes from 14.215.177.39: icmp_seq=2 ttl=56 time=5.95 ms
+
+--- 14.215.177.39 ping statistics ---
+2 packets transmitted, 2 received, 0% packet loss, time 1001ms
+rtt min/avg/max/mdev = 5.954/6.133/6.313/0.195 ms
+
+```
+
+From the comparison, smartdns found the fastest IP address to visit www.baidu.com, so accessing Baidu's DNS is 5 times faster than Ali DNS.
+
+## Features
+
+1. **Multiple upstream DNS servers**  
+   Support configuring multiple upstream DNS servers and query at the same time.the query will not be affected, Even if there is a DNS server exception.  
+
+2. **Return the fastest IP address**  
+   Supports finding the fastest access IP address from the IP address list of the domain name and returning it to the client to avoid DNS pollution and improve network access speed.
+
+3. **Support for multiple query protocols**  
+   Support UDP, TCP, TLS, HTTPS queries, and non-53 port queries, effectively avoiding DNS pollution.
+
+4. **Domain IP address specification**  
+   Support configuring IP address of specific domain to achieve the effect of advertising filtering, and avoid malicious websites.
+
+5. **Domain name high performance rule filtering**  
+   Support domain name suffix matching mode, simplify filtering configuration, filter 200,000 recording and take time <1ms.
+
+6. **Linux/Windows multi-platform support**  
+   Support standard Linux system (Raspberry Pi), openwrt system various firmware, ASUS router native firmware. Support Windows 10 WSL (Windows Subsystem for Linux).
+
+7. **Support IPV4, IPV6 dual stack**  
+   Support IPV4, IPV6 network, support query A, AAAA record, dual-stack IP selection, and disale IPV6 AAAA record.
+
+8. **High performance, low resource consumption**  
+   Multi-threaded asynchronous IO mode, cache cache query results.
+
+## Architecture
+
+![Architecture](doc/architecture.png)
+
+1. SmartDNS receives DNS query requests from local network devices, such as PCs and mobile phone query requests.
+2. SmartDNS sends query requests to multiple upstream DNS servers, using standard UDP queries, non-standard port UDP queries, and TCP queries.
+3. The upstream DNS server returns a list of Server IP addresses corresponding to the domain name. SmartDNS detects the fastest Server IP with local network access.
+4. Return the fastest accessed Server IP to the local client.
+
+## Usage
+
+### Download the package
+
+--------------
+
+Download the matching version of the SmartDNS installation package. The corresponding installation package is as follows.
+
+|system |package|Description
+|-----|-----|-----
+|Standard Linux system (Raspberry Pi)| smartdns.xxxxxxxx.arm-debian-all.deb|Support Raspberry Pi Raspbian stretch, Debian 9 system.
+|Standard Linux system (Armbian arm64)| smartdns.xxxxxxxx.aarch64-debian-all.deb|Support Armbian debian stretch, Debian 9 system.
+|Standard Linux system (x86_64)| smartdns.xxxxxxxx.x86_64-linux-all.tar.gz|Support for x86_64 Linux systems.
+|Windows 10 WSL (ubuntu)| smartdns.xxxxxxxx.x86_64-linux-all.tar.gz|Windows 10 WSL ubuntu.
+|Standard Linux system (x86)| smartdns.xxxxxxxx.x86-linux-all.tar.gz|Support for x86_64 systems.
+|optware|smartdns.xxxxxxxx.mips-optware-all.ipk|Support the MIPS big-endian architecture for optware。
+|optware|smartdns.xxxxxxxx.mipsel-optware-all.ipk|Support the MIPS little-endian architecture for optware。
+|optware|smartdns.xxxxxxxx.arm-optware-all.ipk|Support the arm architecture for optware。
+|openwrt|smartdns.xxxxxxxx.mips-openwrt-all.ipk|Support the MIPS big-endian architecture for openwrt。
+|openwrt|smartdns.xxxxxxxx.mipsel-openwrt-all.ipk|Support the MIPS little-endian architecture for openwrt。
+|openwrt|smartdns.xxxxxxxx.arm-openwrt-all.ipk|Support the arm architecture for openwrt。
+|openwrt LUCI|luci-app-smartdns.xxxxxxxxx.all.ipk|Openwrt management interface.
+|openwrt LUCI|luci-app-smartdns.xxxxxxxxx.all-luci-compat-all|Compat Openwrt management interface for early openwrt.
+
+* The released packages are statically compiled. If you need a small size package, please compile it yourself or obtain it from the openwrt / entware repository.
+
+* **Please download from the Release page: [Download here](https://github.com/pymu/smartdns/releases)**
+
+```shell
+https://github.com/pymumu/smartdns/releases
+```
+
+* For the installation procedure, please refer to the following sections.
+
+### Standard Linux system installation/Raspberry Pi, X86_64 system
+
+--------------
+
+1. Installation
+
+    Download the installation package like `smartdns.xxxxxxxx.arm-debian-all.deb` and upload it to the Linux system. Run the following command to install
+
+    ```shell
+    dpkg -i smartdns.xxxxxxxx.arm-debian-all.deb
+    ```
+
+    For X86-64 system, download the installation package like `smartdns.xxxxxxxx.x86_64-linux-all.tar.gz` and upload it to the Linux system. Run the following command to install
+
+    ```shell
+    tar zxf smartdns.xxxxxxxx.x86_64-linux-all.tar.gz
+    cd smartdns
+    chmod +x ./install
+    ./install -i
+    ```
+
+1. Configuration
+
+    After the installation is complete, you can configure the upstream server to  smartdns. Refer to the `Configuration Parameters` for specific configuration parameters.  
+    In general, you only need to add `server [IP]:port`, `server-tcp [IP]:port` configuration items.  
+    Configure as many upstream DNS servers as possible, including servers at home and abroad. Please refer to the `Configuration Parameters` section for configuration parameters.  
+
+    ```shell
+    vi /etc/smartdns/smartdns.conf
+    ```
+
+1. Start Service
+
+    ```shell
+    systemctl enable smartdns
+    systemctl start smartdns
+    ```
+
+1. Forwarding DNS request to SmartDNS
+
+    Modify the DNS server of the local router and configure the DNS server as SmartDNS.
+    * Log in to the router on the local network and configure the Raspberry Pi to assign a static IP address.
+    * Modify the WAN port or DHCP DNS to the Raspberry Pi IP address.
+    Note:
+    I. Each router configuration method is different. Please search Baidu for related configuration methods.
+    II. some routers may not support configuring custom DNS server. in this case, please modify the PC's, mobile phone's DNS server to the ip of Raspberry Pi.
+
+1. Check if the service is configured successfully
+
+    Query domain name with `nslookup -querytype=ptr smartdns`  
+    Check if the `name` item in the command result is displayed as `smartdns` or `hostname`, such as `smartdns`
+
+    ```shell
+    pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
+    Server:         192.168.1.1
+    Address:        192.168.1.1#53
+
+    Non-authoritative answer:
+    smartdns         name = smartdns.
+    ```
+
+### openwrt
+
+--------------
+
+1. Installation
+
+    Upload the software to the /root directory of the router with winscp or other tool, and execute the following command to install it.
+
+    ```shell
+    opkg install smartdns.xxxxxxxx.xxxx.ipk
+    opkg install luci-app-smartdns.xxxxxxxx.xxxx.all.ipk
+    ```
+
+    * Note: For versions before openwrt 19.07, please install `luci-app-smartdns.xxxxxxxxx.all-luci-compat-all` package.
+
+1. Configuration
+
+    Log in to the openwrt management page and open `Services`->`SmartDNS` to configure SmartDNS.
+    * Add upstream DNS server configuration to `Upstream Servers`. It is recommended to configure multiple DNS servers at home and abroad.
+    * Specify the IP address of a specific domain name in `Domain Address`, which can be used for ad blocking.
+
+1. Start Service
+
+   There are two ways to use the SmartDNS service, `one is directly as the primary DNS service`, `the other is as the upstream of dnsmasq`.  
+   By default, SmartDNS uses the first method. You can choose according to your needs in the following two ways.
+
+1. Method 1: SmartDNS as primary DNS Server (default scheme)
+
+    * **Enable SmartDNS port 53 port redirection**
+
+        Log in to the router, click on `Services`->`SmartDNS`->`redirect`, select `Redirect 53 port to SmartDNS` option to enable port 53 forwarding.
+
+    * **Check if the service is configured successfully**
+
+        Query domain name with `nslookup -querytype=ptr smartdns`
+        See if the `name` item in the command result is displayed as `smartdns` or `hostname`, such as `smartdns`
+
+        ```shell
+        pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
+        Server:         192.168.1.1
+        Address:        192.168.1.1#53
+
+        Non-authoritative answer:
+        smartdns         name = smartdns.
+        ```
+
+    * **The interface prompts that the redirect failed**
+
+        * Check if iptable, ip6table command is installed correctly.
+        * The openwrt 15.01 system does not support IPV6 redirection. If the network needs to support IPV6, please change DNSMASQ upstream to smartdns, or change the smartdns port to 53, and disable dnsmasq.
+        * After LEDE system, please install IPV6 nat forwarding driver. Click `system`->`Software`, click `update lists` to update the software list, install `ip6tables-mod-nat`
+        * Use the following command to check whether the routing rule takes effect.
+
+        ```shell
+        iptables -t nat -L PREROUTING | grep REDIRECT
+        ```
+
+        * If the forwarding function is abnormal, please use Method 2: As the upstream of DNSMASQ.
+
+1. Method 2: SmartDNS as upstream DNS Server of DNSMASQ
+
+    * **Forward dnsmasq's request to SmartDNS**
+
+        Log in to the router, click on `Services`->`SmartDNS`->`redirect`, select `Run as dnsmasq upstream server` option to forwarding dnsmasq request to Smartdns.
+
+    * **Check if the service is configured successfully**
+
+        * Method 1: Query domain name with `nslookup -querytype=ptr 0.0.0.1`
+        See if the `name` item in the command result is displayed as `smartdns` or `hostname`, such as `smartdns`
+
+        ```shell
+        pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
+        Server:         192.168.1.1
+        Address:        192.168.1.1#53
+
+        Non-authoritative answer:
+        smartdns         name = smartdns.
+        ```
+
+        * Method 2: Use `nslookup` to query the `www.baidu.com` domain name to see if the IP address of Baidu in the result is `only one. If there are multiple IP addresses returned, it means that it is not valid. Please try to check several domain names.
+
+        ```shell
+        pi@raspberrypi:~ $ nslookup www.baidu.com 192.168.1.1
+        Server:         192.168.1.1
+        Address:        192.168.1.1#53
+
+        Non-authoritative answer:
+        www.baidu.com   canonical name = www.a.shifen.com.
+        Name:   www.a.shifen.com
+        Address: 14.215.177.38
+        ```
+
+1. Start Service
+
+    Check the `Enable' in the configuration page to start SmartDNS server.
+
+1. Note
+
+    * If chinaDNS is already installed, it is recommended to configure the upstream of chinaDNS as SmartDNS.
+    * SmartDNS defaults to forwarding port 53 requests to the local port of SmartDNS, controlled by the `Redirect` configuration option.
+
+### ASUS router native firmware / Merlin firmware
+
+--------------
+
+Note: Merlin firmware is derived from ASUS firmware and can theoretically be used directly with the ASUS package. However, it is currently unverified. If you have any questions, please submit an issue.
+
+1. Prepare
+
+    When using this software, you need to confirm whether the router supports U disk and prepare a USB disk.
+
+1. Enable SSH login
+
+    Log in to the management interface, click `System Management`-> Click `System Settings` and configure `Enable SSH` to `Lan Only`.  
+    The SSH login username and password are the same as the management interface.
+
+1. Insstall `Download Master`
+
+    In the management interface, click `USB related application`-> click `Download Master` to download.  
+    After the download is complete, enable `Download Master`. If you do not need the download function, you can uninstall `Download Master` here, but make sure that Download Master is enabled before uninstalling.  
+
+1. Install SmartDNS
+
+    Upload the software to the router's `/tmp/mnt/sda1` directory using winscp. (or copy the network neighborhood to the sda1 shared directory)
+
+    ```shell
+    ipkg install smartdns.xxxxxxx.mipsbig.ipk
+    ```
+
+1. Restart router
+
+    After the router is started, use `nslookup -querytype=ptr smartdns` to query the domain name.  
+    See if the `name` item in the command result is displayed as `smartdns` or `hostname`, such as `smartdns`
+
+    ```shell
+    pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
+    Server:         192.168.1.1
+    Address:        192.168.1.1#53
+
+    Non-authoritative answer:
+    smartdns         name = smartdns.
+    ```
+
+1. Note
+
+    In the above process, smartdns will be installed to the root directory of the U disk and run in optware mode.  
+    Its directory structure is as follows: (only smartdns related files are listed here)
+
+    ```shell
+    USB DISK
+    └── asusware.mipsbig
+            ├── bin
+            ├── etc
+            |    ├── smartdns
+            |    |     └── smartdns.conf
+            |    └── init.d
+            |          └── S50smartdns
+            ├── lib
+            ├── sbin
+            ├── usr
+            |    └── sbin
+            |          └── smartdns
+            ....
+    ```
+
+    To modify the configuration, you can use ssh to login to the router and use the vi command to modify it.
+
+    ```shell
+    vi /opt/etc/smartdns/smartdns.conf
+    ```
+
+    It can also be modified from Network Neighborhood. From the neighbor sharing directory `sda1` you can't see the `asusware.mipsbig` directory, but you can directly enter `asusware.mipsbig\etc\init.d` in `File Manager` to modify it.
+
+    ```shell
+    \\192.168.1.1\sda1\asusware.mipsbig\etc\init.d
+    ```
+
+### optware/entware
+
+--------------
+
+1. Prepare
+
+    When using this software, you need to confirm whether the router supports USB disk and prepare a USB disk.
+
+1. Install SmartDNS
+
+    Upload the software to `/tmp` directory of the router using winscp, and run the flollowing command to install.
+
+    ```shell
+    ipkg install smartdns.xxxxxxx.mipsbig.ipk
+    ```
+
+1. Modify the smartdns configuration
+
+    ```shell
+    Vi /opt/etc/smartdns/smartdns.conf
+    ```
+
+    Note: if you need to support IPV6, you can set the worke-mode to `2`, this will disable the DNS service of dnsmasq, and smartdns run as the primary DNS server. Change `SMARTDNS_WORKMODE` in the file `/opt/etc/smartdns/smartdns-opt.conf` to 2.
+
+    ```shell
+    SMARTDNS_WORKMODE="2"
+    ```
+
+1. Restart the router to take effect
+
+    After the router is started, use `nslookup -querytype=ptr smartdns` to query the domain name.
+    See if the `name` item in the command result is displayed as `smartdns` or `hostname`, such as `smartdns`
+
+    ```shell
+    Pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
+    Server: 192.168.1.1
+    Address: 192.168.1.1#53
+
+    Non-authoritative answer:
+    smartdns        name = smartdns.
+    ```
+
+    Note: If the service does not start automatically, you need to set optwre/entware to start automatically. For details, see the optware/entware documentation.
+
+### Windows 10 WSL Installation/WSL ubuntu
+
+--------------
+
+1. Install Windows 10 WSL ubuntu
+
+   Install the Windows 10 WSL environment and select Ubuntu as default distribution. Please refer to [WSL installation instructions](https://docs.microsoft.com/en-us/windows/wsl/install-win10) for installation steps
+
+1. Install smartdns
+
+    download install package `smartdns.xxxxxxxx.x86_64-linux-all.tar.gz`，and unzip to the `D:\` directory, after decompression, the directory is as follows: 
+
+    ```shell
+    D:\SMARTDNS
+    ├─etc
+    │  ├─default
+    │  ├─init.d
+    │  └─smartdns
+    ├─package
+    │  └─windows
+    ├─src
+    └─systemd
+
+    ```
+
+    Double-click `install.bat` in the `D:\smartdns\package\windows` directory for installation. Please enter the password for `WLS ubuntu` when input password.
+
+1. Configuration
+
+    Edit `smartdns.conf` configuration file in `D:\smartdns\etc\smartdns` directory, you can configure the upstream server to  smartdns. Refer to the `Configuration Parameters` for specific configuration parameters.  
+    In general, you only need to add `server [IP]:port`, `server-tcp [IP]:port` configuration items.  
+    Configure as many upstream DNS servers as possible, including servers at home and abroad. Please refer to the `Configuration Parameters` section for configuration parameters.  
+
+1. Start Service
+
+    Double-click `reload.bat` in the `D:\smartdns\package\windows` directory for reload.
+
+1. Forwarding DNS request to SmartDNS
+
+    Modify the default DNS server for Windows to `127.0.0.1`, with these steps referred to [IP configuration](https://support.microsoft.com/en-us/help/15089/windows-change-tcp-ip-settings)
+
+1. Check if the service is configured successfully
+
+    Query domain name with `nslookup -querytype=ptr smartdns`  
+    Check if the `name` item in the command result is displayed as `smartdns` or `hostname`, such as `smartdns`
+
+    ```shell
+    pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr smartdns
+    Server:         192.168.1.1
+    Address:        192.168.1.1#53
+
+    Non-authoritative answer:
+    smartdns         name = smartdns.
+    ```
+
+## Configuration parameter
+
+|parameter|Parameter function|Default value|Value type|Example|
+|--|--|--|--|--|
+|server-name|DNS name|host name/smartdns|any string like hosname|server-name smartdns
+|bind|DNS listening port number|[::]:53|Support binding multiple ports<br>`IP:PORT`: server IP, port number. <br>`[-group]`: The DNS server group used when requesting. <br>`[-no-rule-addr]`: Skip the address rule. <br>`[-no-rule-nameserver]`: Skip the Nameserver rule. <br>`[-no-rule-ipset]`: Skip the Ipset rule. <br>`[-no-rule-soa]`: Skip address SOA(#) rules.<br>`[-no-dualstack-selection]`: Disable dualstack ip selection.<br>`[-no-speed-check]`: Disable speed measurement. <br>`[-no-cache]`: stop caching |bind :53
+|bind-tcp|TCP mode DNS listening port number|[::]:53|Support binding multiple ports<br>`IP:PORT`: server IP, port number. <br>`[-group]`: The DNS server group used when requesting. <br>`[-no-rule-addr]`: Skip the address rule. <br>`[-no-rule-nameserver]`: Skip the Nameserver rule. <br>`[-no-rule-ipset]`: Skip the Ipset rule. <br>`[-no-rule-soa]`: Skip address SOA(#) rules.<br>`[-no-dualstack-selection]`: Disable dualstack ip selection.<br>`[-no-speed-check]`: Disable speed measurement. <br>`[-no-cache]`: stop caching |bind-tcp :53
+|cache-size|Domain name result cache number|512|integer|cache-size 512
+|tcp-idle-time|TCP connection idle timeout|120|integer|tcp-idle-time 120
+|rr-ttl|Domain name TTL|Remote query result|number greater than 0|rr-ttl 600
+|rr-ttl-min|Domain name Minimum TTL|Remote query result|number greater than 0|rr-ttl-min 60
+|rr-ttl-max|Domain name Maximum TTL|Remote query result|number greater than 0|rr-ttl-max 600
+|log-level|log level|error|fatal,error,warn,notice,info,debug|log-level error
+|log-file|log path|/var/log/smartdns.log|File Pah|log-file /var/log/smartdns.log
+|log-size|log size|128K|number+K,M,G|log-size 128K
+|log-num|archived log number|2|Integer|log-num 2
+|audit-enable|audit log enable|no|[yes\|no]|audit-enable yes
+|audit-file|audit log file|/var/log/smartdns-audit.log|File Path|audit-file /var/log/smartdns-audit.log
+|audit-size|audit log size|128K|number+K,M,G|audit-size 128K
+|audit-num|archived audit log number|2|Integer|audit-num 2
+|conf-file|additional conf file|None|File path|conf-file /etc/smartdns/smartdns.more.conf
+|server|Upstream UDP DNS server|None|Repeatable <br>`[ip][:port]`: Server IP, port optional. <br>`[-blacklist-ip]`: The "-blacklist-ip" parameter is to filtering IPs which is configured by "blacklist-ip". <br>`[-whitelist-ip]`: whitelist-ip parameter specifies that only the IP range configured in whitelist-ip is accepted. <br>`[-group [group] ...]`: The group to which the DNS server belongs, such as office, foreign, use with nameserver. <br>`[-exclude-default-group]`: Exclude DNS servers from the default group| server 8.8.8.8:53 -blacklist-ip
+|server-tcp|Upstream TCP DNS server|None|Repeatable <br>`[ip][:port]`: Server IP, port optional. <br>`[-blacklist-ip]`: The "-blacklist-ip" parameter is to filtering IPs which is configured by "blacklist-ip". <br>`[-whitelist-ip]`: whitelist-ip parameter specifies that only the IP range configured in whitelist-ip is accepted. <br>`[-group [group] ...]`: The group to which the DNS server belongs, such as office, foreign, use with nameserver. <br>`[-exclude-default-group]`: Exclude DNS servers from the default group| server-tcp 8.8.8.8:53
+|server-tls|Upstream TLS DNS server|None|Repeatable <br>`[ip][:port]`: Server IP, port optional. <br>`[-spki-pin [sha256-pin]]`: TLS verify SPKI value, a base64 encoded SHA256 hash<br>`[-host-name]`:TLS Server name. <br>`[-tls-host-verify]`: TLS cert hostname to verify. <br>`-no-check-certificate:`: No check certificate. <br>`[-blacklist-ip]`: The "-blacklist-ip" parameter is to filtering IPs which is configured by "blacklist-ip". <br>`[-whitelist-ip]`: whitelist-ip parameter specifies that only the IP range configured in whitelist-ip is accepted. <br>`[-group [group] ...]`: The group to which the DNS server belongs, such as office, foreign, use with nameserver. <br>`[-exclude-default-group]`: Exclude DNS servers from the default group| server-tls 8.8.8.8:853
+|server-https|Upstream HTTPS DNS server|None|Repeatable <br>`https://[host][:port]/path`: Server IP, port optional. <br>`[-spki-pin [sha256-pin]]`: TLS verify SPKI value, a base64 encoded SHA256 hash<br>`[-host-name]`:TLS Server name<br>`[-http-host]`：http header host. <br>`[-tls-host-verify]`: TLS cert hostname to verify. <br>`-no-check-certificate:`: No check certificate. <br>`[-blacklist-ip]`: The "-blacklist-ip" parameter is to filtering IPs which is configured by "blacklist-ip". <br>`[-whitelist-ip]`: whitelist-ip parameter specifies that only the IP range configured in whitelist-ip is accepted. <br>`[-group [group] ...]`: The group to which the DNS server belongs, such as office, foreign, use with nameserver. <br>`[-exclude-default-group]`: Exclude DNS servers from the default group| server-https https://cloudflare-dns.com/dns-query
+|speed-check-mode|Speed ​​mode|None|[ping\|tcp:[80]\|none]|speed-check-mode ping,tcp:443
+|address|Domain IP address|None|address /domain/[ip\|-\|-4\|-6\|#\|#4\|#6], `-` for ignore, `#` for return SOA, `4` for IPV4, `6` for IPV6| address /www.example.com/1.2.3.4
+|nameserver|To query domain with specific server group|None|nameserver /domain/[group\|-], `group` is the group name, `-` means ignore this rule, use the `-group` parameter in the related server|nameserver /www.example.com/office
+|ipset|Domain IPSet|None|ipset /domain/[ipset\|-], `-` for ignore|ipset /www.example.com/pass
+|ipset-timeout|ipset timeout enable|auto|[yes]|ipset-timeout yes
+|domain-rules|set domain rules|None|domain-rules /domain/ [-rules...]<br>`[-speed-check-mode]`: set speed check mode，same as parameter `speed-check-mode`<br>`[-address]`: same as  parameter `address` <br>`[-nameserver]`: same as parameter `nameserver`<br>`[-ipset]`: same as parameter `ipset`|domain-rules /www.example.com/ -speed-check-mode none
+|bogus-nxdomain|bogus IP address|None|[IP/subnet], Repeatable| bogus-nxdomain 1.2.3.4/16
+|ignore-ip|ignore ip address|None|[ip/subnet], Repeatable| ignore-ip 1.2.3.4/16
+|whitelist-ip|ip whitelist|None|[ip/subnet], Repeatable，When the filtering server responds IPs in the IP whitelist, only result in whitelist will be accepted| whitelist-ip 1.2.3.4/16
+|blacklist-ip|ip blacklist|None|[ip/subnet], Repeatable，When the filtering server responds IPs in the IP blacklist, The result will be discarded directly| blacklist-ip 1.2.3.4/16
+|force-AAAA-SOA|force AAAA query return SOA|no|[yes\|no]|force-AAAA-SOA yes
+|prefetch-domain|domain prefetch feature|no|[yes\|no]|prefetch-domain yes
+|serve-expired|Cache serve expired feature|no|[yes\|no], Attempts to serve old responses from cache with a TTL of 0 in the response without waiting for the actual resolution to finish.|serve-expired yes
+|serve-expired-ttl|Cache serve expired limite TTL|0|second，0：disable，> 0  seconds after expiration|serve-expired-ttl 0
+|dualstack-ip-selection|Dualstack ip selection|no|[yes\|no]|dualstack-ip-selection yes
+|dualstack-ip-selection-threshold|Dualstack ip select threadhold|30ms|millisecond|dualstack-ip-selection-threshold [0-1000]
+|ca-file|certificate file|/etc/ssl/certs/ca-certificates.crt|path|ca-file /etc/ssl/certs/ca-certificates.crt
+|ca-path|certificates path|/etc/ssl/certs|path|ca-path /etc/ssl/certs
+
+## FAQ
+
+1. What is the difference between SmartDNS and DNSMASQ?  
+    Smartdns is not designed to replace DNSMASQ. The main function of Smartdns is focused on DNS resolution enhancement, the difference are:  
+    * Multiple upstream server concurrent requests, after the results are measured, return the best results;
+    * `address`, `ipset` domain name matching uses efficient algorithms, query matching is faster and more efficient, and router devices are still efficient.
+    * Domain name matching supports ignoring specific domain names, and can be individually matched to IPv4, IPV6, and supports diversified customization.
+    * Enhance the ad blocking feature, return SOA record, this block ads better;
+    * IPV4, IPV6 dual stack IP optimization mechanism, in the case of dual network, choose the fastest network.
+    * Supports the latest TLS, HTTPS protocol and provides secure DNS query capabilities.
+    * DNS anti-poison mechanism, and a variety of mechanisms to avoid DNS pollution.
+    * ECS support, the query results are better and more accurate.
+    * IP blacklist support, ignoring the blacklist IP to make domain name queries better and more accurate.
+    * Domain name pre-fetch, more faster to access popular websites.
+    * Domain name TTL can be specified to make access faster.
+    * Cache mechanism to make access faster.
+    * Asynchronous log, audit log mechanism, does not affect DNS query performance while recording information.
+    * Domain group mechanism, specific domain names use specific upstream server group queries to avoid privacy leakage.
+    * The second DNS supports customizing more behavior.
+
+1. What is the best practices for upstream server configuration?  
+    Smartdns has a speed measurement mechanism. When configuring an upstream server, it is recommended to configure multiple upstream DNS servers, including servers in different regions, but the total number is recommended to be around 10. Recommended configuration
+    * Carrier DNS.
+    * Public DNS, such as `8.8.8.8`, `8.8.4.4`, `1.1.1.1`.
+
+    For specific domain names, if there is a pollution, you can enable the anti-pollution mechanism.
+
+1. How to enable the audit log  
+    The audit log records the domain name requested by the client. The record information includes the request time, the request IP address, the request domain name, and the request type. If you want to enable the audit log, configure `audit-enable yes` in the configuration file, `audit-size`, `Audit-file`, `audit-num` configure the audit log file size, the audit log file path, and the number of audit log files. The audit log file will be compressed to save space.
+
+1. How to avoid DNS privacy leaks
+    By default, smartdns will send requests to all configured DNS servers. If the upstream DNS servers record DNS logs, it will result in a DNS privacy leak. To avoid privacy leaks, try the following steps:
+    * Use trusted DNS servers.
+    * Use TLS servers.
+    * Set up an upstream DNS server group.
+
+1. How to block ads
+    Smartdns has a high-performance domain name matching algorithm. It is very efficient to filter advertisements by domain name. To block ads, you only need to configure records like the following configure. For example, if you block `*.ad.com`, configure as follows:
+
+    ```sh
+    Address /ad.com/#
+    ```
+
+    The suffix mode of the domain name, filtering *.ad.com, `#` means returning SOA record. If you want to only block IPV4 or IPV6 separately, add a number after `#`, such as `#4` is for IPV4 blocking. If you want to ignore some specific subdomains, you can configure it as follows. e.g., if you ignore `pass.ad.com`, you can configure it as follows:
+
+    ```sh
+    Address /pass.ad.com/-
+    ```
+
+1. DNS query diversion
+    In some cases, some domain names need to be queried using a specific DNS server to do DNS diversion. such as.
+
+    ```sh
+    .home -> 192.168.1.1
+    .office -> 10.0.0.1
+    ```
+
+    The domain name ending in .home is sent to 192.168.1.1 for resolving
+    The domain name ending in .office is sent to 10.0.0.1 for resolving
+    Other domain names are resolved using the default mode.
+    The diversion configuration for this case is as follows:
+
+    ```sh
+    # Upstream configuration, use -group to specify the group name, and -exclude-default-group to exclude the server from the default group.
+    Server 192.168.1.1 -group home -exclude-default-group
+    Server 10.0.0.1 -group office -exclude-default-group
+    Server 8.8.8.8
+
+    #Configure the resolved domain name with specific group
+    Nameserver /.home/home
+    Nameserver /.office/office
+    ```
+
+    You can use the above configuration to implement DNS resolution and offload. If you need to implement traffic distribution on the requesting port, you can configure the second DNS server. The bind configuration is added. The group parameter specifies the traffic distribution name.
+
+    ```sh
+    Bind :7053 -group office
+    Bind :8053 -group home
+    ```
+
+1. How to use the IPV4, IPV6 dual stack IP optimization feature  
+    At present, IPV6 network is not as fast as IPV4 in some cases. In order to get a better experience in the dual-stack network, SmartDNS provides a dual-stack IP optimization mechanism, the same domain name, and the speed of IPV4. Far faster than IPV6, then SmartDNS will block the resolution of IPV6, let the PC use IPV4, the feature is enabled by `dualstack-ip-selection yes`, `dualstack-ip-selection-threshold [time]` is for threshold. if you want to disable IPV6 AAAA record complete, please try `force-AAAA-SOA yes`.
+
+1. How to improve cache performace  
+    Smartdns provides a domain name caching mechanism to cache the queried domain name, and the caching time is in accordance with the DNS TTL specification. To increase the cache hit rate, the following configuration can be taken:
+    * Increase the number of cache records appropriately  
+    Set the number of cache records by `cache-size`.
+    In the case of a query with a high pressure environment and a machine with a large memory, it can be appropriately adjusted.
+
+    * Set the minimum TTL value as appropriate  
+    Set the minimum DNS TTL time to a appropriate value by `rr-ttl-min` to extend the cache time.
+    It is recommended that the timeout period be set to 10 to 30 minutes to avoid then invalid domain names when domain ip changes.
+
+    * Enable domain pre-acquisition  
+    Enable pre-fetching of domain names with `prefetch-domain yes` to improve query hit rate.
+    by default, Smartdns will send domain query request again before cache expire, and cache the result for the next query. Frequently accessed domain names will continue to be cached. This feature will consume more CPU when idle.
+
+    * Cache serve expired feature  
+    Enable cache serve expired feature with `serve-expired yes` to improve the cache hit rate and reduce the CPU consumption.
+    This feature will return TTL = 0 to the client after the TTL timeout, and send a new query request again at the same time, and cache the new results for later query.
+
+1. How does the second DNS customize more behavior?
+    The second DNS can be used as the upstream of other DNS servers to provide more query behaviors. Bind configuration support can bind multiple ports. Different ports can be set with different flags to implement different functions, such as
+
+    ```sh
+    # Binding 6053 port, request for port 6053 will be configured with the upstream query of the office group, and the result will not be measured. The address configuration address is ignored.
+    bind [::]:6053 -no-speed-check -group office -no-rule-addr
+    ```
+
+## Compile
+
+smartdns contains scripts for compiling packages, supports compiling luci, debian, openwrt, opare installation packages, and can execute `package/build-pkg.sh` compilation.
+
+## [Donate](#Donate)  
+
+If you feel that this project is helpful to you, please donate to us so that the project can continue to develop and be more perfect.
+
+### PayPal
+
+[![Support via PayPal](https://cdn.rawgit.com/twolfson/paypal-github-button/1.0.0/dist/button.svg)](https://paypal.me/PengNick/)
+
+### Alipay
+
+![alipay](doc/alipay_donate.jpg)
+
+### Wechat
+  
+![wechat](doc/wechat_donate.jpg)
+
+## Open Source License
+
+Smartdns is licensed to the public under the GPL V3 License.

ReadMe_zh-CN.md

@@ -1,489 +0,0 @@
-# SmartDNS
-
-![SmartDNS](doc/smartdns-banner.png)  
-SmartDNS是一个运行在本地的DNS服务器，SmartDNS接受本地客户端的DNS查询请求，从多个上游DNS服务器获取DNS查询结果，并将访问速度最快的结果返回给客户端，避免DNS污染，提高网络访问速度。
-同时支持指定特定域名IP地址，并高性匹配，达到过滤广告的效果。  
-与dnsmasq的all-servers不同，smartdns返回的是访问速度最快的解析结果。  
-
-支持树莓派，openwrt，华硕路由器等设备。  
-
-## 软件效果展示
-
-**阿里DNS**  
-使用阿里DNS查询百度IP，并检测结果。  
-
-```shell
-pi@raspberrypi:~/code/smartdns_build $ nslookup www.baidu.com 223.5.5.5
-Server:         223.5.5.5
-Address:        223.5.5.5#53
-
-Non-authoritative answer:
-www.baidu.com   canonical name = www.a.shifen.com.
-Name:   www.a.shifen.com
-Address: 180.97.33.108
-Name:   www.a.shifen.com
-Address: 180.97.33.107
-
-pi@raspberrypi:~/code/smartdns_build $ ping 180.97.33.107 -c 2
-PING 180.97.33.107 (180.97.33.107) 56(84) bytes of data.
-64 bytes from 180.97.33.107: icmp_seq=1 ttl=55 time=24.3 ms
-64 bytes from 180.97.33.107: icmp_seq=2 ttl=55 time=24.2 ms
-
---- 180.97.33.107 ping statistics ---
-2 packets transmitted, 2 received, 0% packet loss, time 1001ms
-rtt min/avg/max/mdev = 24.275/24.327/24.380/0.164 ms
-pi@raspberrypi:~/code/smartdns_build $ ping 180.97.33.108 -c 2
-PING 180.97.33.108 (180.97.33.108) 56(84) bytes of data.
-64 bytes from 180.97.33.108: icmp_seq=1 ttl=55 time=31.1 ms
-64 bytes from 180.97.33.108: icmp_seq=2 ttl=55 time=31.0 ms
-
---- 180.97.33.108 ping statistics ---
-2 packets transmitted, 2 received, 0% packet loss, time 1001ms
-rtt min/avg/max/mdev = 31.014/31.094/31.175/0.193 ms
-```
-
-**smartdns**  
-使用SmartDNS查询百度IP，并检测结果。
-
-```shell
-pi@raspberrypi:~/code/smartdns_build $ nslookup www.baidu.com
-Server:         192.168.1.1
-Address:        192.168.1.1#53
-
-Non-authoritative answer:
-www.baidu.com   canonical name = www.a.shifen.com.
-Name:   www.a.shifen.com
-Address: 14.215.177.39
-
-pi@raspberrypi:~/code/smartdns_build $ ping 14.215.177.39 -c 2
-PING 14.215.177.39 (14.215.177.39) 56(84) bytes of data.
-64 bytes from 14.215.177.39: icmp_seq=1 ttl=56 time=6.31 ms
-64 bytes from 14.215.177.39: icmp_seq=2 ttl=56 time=5.95 ms
-
---- 14.215.177.39 ping statistics ---
-2 packets transmitted, 2 received, 0% packet loss, time 1001ms
-rtt min/avg/max/mdev = 5.954/6.133/6.313/0.195 ms
-
-```
-
-从对比看出，smartdns找到访问www.baidu.com最快的IP地址，这样访问百度比阿里DNS速度快5倍。
-
-## 特性
-
-1. **多DNS上游服务器**  
-   支持配置多个上游DNS服务器，并同时进行查询，即使其中有DNS服务器异常，也不会影响查询。  
-
-2. **返回最快IP地址**  
-   支持从域名所属IP地址列表中查找到访问速度最快的IP地址，并返回给客户端，避免DNS污染，提高网络访问速度。
-
-3. **支持多种查询协议**  
-   支持UDP，TCP，TLS查询，以及非53端口查询，有效避免DNS污染。
-
-4. **特定域名IP地址指定**  
-   支持指定域名的IP地址，达到广告过滤效果，避免恶意网站的效果。
-
-5. **域名高性能后缀匹配**  
-   支持域名后缀匹配模式，简化过滤配置，过滤20万条记录时间<1ms
-
-6. **Linux/Windows多平台支持**  
-   支持标准Linux系统（树莓派），openwrt系统各种固件，华硕路由器原生固件。以及支持Windows 10 WSL (Windows Subsystem for Linux)。
-
-7. **支持IPV4, IPV6双栈**  
-   支持IPV4，IPV6网络，支持查询A, AAAA记录，支持双栈IP速度优化。
-
-8. **高性能，占用资源少**  
-   多线程异步IO模式，cache缓存查询结果。
-
-## 架构
-
-![Architecture](doc/architecture.png)
-
-1. SmartDNS接收本地网络设备的DNS查询请求，如PC，手机的查询请求。  
-2. SmartDNS将查询请求发送到多个上游DNS服务器，可采用标准UDP查询，非标准端口UDP查询，及TCP查询。  
-3. 上游DNS服务器返回域名对应的Server IP地址列表。SmartDNS检测与本地网络访问速度最快的Server IP。  
-4. 将访问速度最快的Server IP返回给本地客户端。  
-
-## 使用
-
-### 下载配套安装包  
-
---------------
-
-下载配套版本的SmartDNS安装包，对应安装包配套关系如下。
-
-|系统 |安装包|说明
-|-----|-----|-----
-|标准Linux系统(树莓派)| smartdns.xxxxxxxx.armhf.deb|支持树莓派Raspbian stretch，Debian 9系统。
-|标准Linux系统(x86_64)| smartdns.xxxxxxxx.x86_64.tar.gz|支持x86_64 Linux 系统。
-|Windows 10 WSL (ubuntu)| smartdns.xxxxxxxx.x86_64.tar.gz|支持Windows 10 WSL ubuntu系统。
-|标准Linux系统(x86)| smartdns.xxxxxxxx.x86.tar.gz|支持x86系统。
-|华硕原生固件(optware)|smartdns.xxxxxxx.mipsbig.ipk|支持MIPS大端架构的系统，如RT-AC55U, RT-AC66U.
-|华硕原生固件(optware)|smartdns.xxxxxxx.mipsel.ipk|支持MIPS小端架构的系统。
-|华硕原生固件(optware)|smartdns.xxxxxxx.arm.ipk|支持arm小端架构的系统，如RT-AC68U。
-|Padavan|smartdns.xxxxxxx.mipselsf.ipk|padavan固件。
-|openwrt 15.01|smartdns.xxxxxxxx.ar71xx.ipk|支持AR71XX MIPS系统。
-|openwrt 15.01|smartdns.xxxxxxxx.ramips_24kec.ipk|支持MT762X等小端路由器
-|openwrt 15.01(潘多拉)|smartdns.xxxxxxxx.mipsel_24kec_dsp.ipk|支持MT7620系列的潘多拉固件
-|openwrt 15.01(潘多拉)|smartdns.xxxxxxxx.mips_74kc_dsp2.ipk|支持AR71xx系列的潘多拉固件
-|openwrt 18.06|smartdns.xxxxxxxx.mips_24kc.ipk|支持AR71XX MIPS系统。
-|openwrt 18.06|smartdns.xxxxxxxx.mipsel_24kc.ipk|支持MT726X等小端路由器
-|openwrt 18.06|smartdns.xxxxxxxx.x86_64.ipk|支持x86_64路由器
-|openwrt 18.06|smartdns.xxxxxxxx.i386_pentium4.ipk|支持x86路由器
-|openwrt 18.06|smartdns.xxxxxxxxxxx.arm_cortex-a9.ipk|支持arm A9核心CPU的路由器
-|openwrt 18.06|smartdns.xxxxxxxxx.arm_cortex-a7_neon-vfpv4.ipk|支持arm A7核心CPU的路由器
-|openwrt LUCI|luci-app-smartdns.xxxxxxxxx.xxxx.all.ipk|openwrt管理统一界面
-
-* openwrt系统CPU架构比较多，上述表格未列出所有支持系统，请查看CPU架构后下载。
-* merlin梅林固件理论和华硕固件一致，所以根据硬件类型安装相应的ipk包即可。（梅林暂时未验证，有问题提交issue）
-* CPU架构可在路由器管理界面找到，查看方法：
-    登录路由器，点击`System`->`Software`，点击`Configuration` Tab页面，在opkg安装源中可找到对应软件架构，下载路径中可找到，如下，架构为ar71xx
-
-    ```shell
-    src/gz chaos_calmer_base http://downloads.openwrt.org/chaos_calmer/15.05/ar71xx/generic/packages/base
-    ```
-
-    请在Release页面下载：[此处下载](https://github.com/pymumu/smartdns/releases)
-
-### 标准Linux系统安装（树莓派, X86_64系统）
-
---------------
-
-1. 安装
-
-    下载配套安装包`smartdns.xxxxxxxx.armhf.deb`，并上传到Linux系统中。 执行如下命令安装
-
-    ```shell
-    dpkg -i smartdns.xxxxxxxx.armhf.deb
-    ```
-
-1. 修改配置
-
-    安装完成后，可配置smartdns的上游服务器信息。具体配置参数参考`配置参数`说明。  
-    一般情况下，只需要增加`server [IP]:port`, `server-tcp [IP]:port`配置项，
-    尽可能配置多个上游DNS服务器，包括国内外的服务器。配置参数请查看`配置参数`章节。
-
-    ```shell
-    vi /etc/smartdns/smartdns.conf
-    ```
-
-1. 启动服务
-
-    ```shell
-    systemctl enable smartdns
-    systemctl start smartdns
-    ```
-
-1. 将DNS请求转发的SmartDNS解析。
-
-    修改本地路由器的DNS服务器，将DNS服务器配置为SmartDNS。
-    * 登录到本地网络的路由器中，配置树莓派分配静态IP地址。
-    * 修改WAN口或者DHCP DNS为树莓派IP地址。  
-    注意：  
-    I. 每款路由器配置方法不尽相同，请百度搜索相关的配置方法。  
-    II.华为等路由器可能不支持配置DNS为本地IP，请修改PC端，手机端DNS服务器为树莓派IP。
-
-1. 检测服务是否配置成功。
-
-    使用`nslookup -querytype=ptr 0.0.0.0`查询域名  
-    看命令结果中的`name`项目是否显示为`smartdns`或`主机名`，如`smartdns`则表示生效  
-
-    ```shell
-    pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr 0.0.0.0
-    Server:         192.168.1.1
-    Address:        192.168.1.1#53
-
-    Non-authoritative answer:
-    0.0.0.0.in-addr.arpa  name = smartdns.
-    ```
-
-### openwrt/LEDE
-
---------------
-
-1. 安装
-
-    将软件使用winscp上传到路由器的/root目录，执行如下命令安装  
-
-    ```shell
-    opkg install smartdns.xxxxxxxx.xxxx.ipk
-    opkg install luci-app-smartdns.xxxxxxxx.xxxx.all.ipk
-    ```
-
-1. 修改配置
-
-    登录openwrt管理页面，打开`Services`->`SmartDNS`进行配置。
-    * 在`Upstream Servers`增加上游DNS服务器配置，建议配置多个国内外DNS服务器。
-    * 在`Domain Address`指定特定域名的IP地址，可用于广告屏蔽。
-
-1. 启用服务
-
-   SmartDNS服务生效方法有两种，`一种是直接作为主DNS服务`；`另一种是作为dnsmasq的上游`。  
-   默认情况下，SmartDNS采用第一种方式。如下两种方式根据需求选择即可。
-
-1. 启用方法一：作为主DNS(默认方案)
-
-    * **启用smartdns的53端口重定向**
-
-        登录路由器，点击`Services`->`SmartDNS`->`redirect`，选择`重定向53端口到SmartDNS`启用53端口转发。
-
-    * **检测转发服务是否配置成功**
-
-        使用`nslookup -querytype=ptr 0.0.0.0`查询域名  
-        看命令结果中的`name`项目是否显示为`smartdns`或`主机名`，如`smartdns`则表示生效  
-
-        ```shell
-        pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr 0.0.0.0
-        Server:         192.168.1.1
-        Address:        192.168.1.1#53
-
-        Non-authoritative answer:
-        0.0.0.0.in-addr.arpa  name = smartdns.
-        ```
-
-    * **界面提示重定向失败**
-
-        * 检查iptable，ip6table命令是否正确安装。
-        * openwrt 15.01系统不支持IPV6重定向，如网络需要支持IPV6，请将DNSMASQ上游改为smartdns，或者将smartdns的端口改为53，并停用dnsmasq。
-        * LEDE之后系统，请安装IPV6的nat转发驱动。点击`system`->`Software`，点击`update lists`更新软件列表后，安装`ip6tables-mod-nat`
-        * 使用如下命令检查路由规则是否生效。  
-
-        ```shell
-        iptables -t nat -L PREROUTING | grep REDIRECT
-        ```
-        * 如转发功能不正常，请使用方法二：作为DNSMASQ的上游。
-
-1. 方法二：作为DNSMASQ的上游
-
-    * **将dnsmasq的请求发送到smartdns**
-
-        登录路由器，点击`Services`->`SmartDNS`->`redirect`，选择`作为dnsmasq的上游服务器`设置dnsmasq的上游服务器为smartdns。
-
-    * **检测上游服务是否配置成功**
-
-        * 方法一：使用`nslookup -querytype=ptr 0.0.0.0`查询域名  
-        看命令结果中的`name`项目是否显示为`smartdns`或`主机名`，如`smartdns`则表示生效  
-
-        ```shell
-        pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr 0.0.0.0
-        Server:         192.168.1.1
-        Address:        192.168.1.1#53
-
-        Non-authoritative answer:
-        0.0.0.0.in-addr.arpa  name = smartdns.
-        ```
-
-        * 方法二：使用`nslookup`查询`www.baidu.com`域名，查看结果中百度的IP地址是否`只有一个`，如有多个IP地址返回，则表示未生效，请多尝试几个域名检查。
-
-        ```shell
-        pi@raspberrypi:~ $ nslookup www.baidu.com 192.168.1.1
-        Server:         192.168.1.1
-        Address:        192.168.1.1#53
-
-        Non-authoritative answer:
-        www.baidu.com   canonical name = www.a.shifen.com.
-        Name:   www.a.shifen.com
-        Address: 14.215.177.38
-        ```
-
-1. 启动服务
-
-    勾选配置页面中的`Enable(启用)`来启动SmartDNS
-
-1. 注意：
-
-    * 如已经安装chinaDNS，建议将chinaDNS的上游配置为SmartDNS。
-    * SmartDNS默认情况，将53端口的请求转发到SmartDNS的本地端口，由`Redirect`配置选项控制。
-
-### 华硕路由器原生固件/梅林固件
-
---------------
-
-说明：梅林固件派生自华硕固件，理论上可以直接使用华硕配套的安装包使用。但目前未经验证，如有问题，请提交issue。
-
-1. 准备
-
-    在使用此软件时，需要确认路由器是否支持U盘，并准备好U盘一个。
-
-1. 启用SSH登录
-
-    登录管理界面，点击`系统管理`->点击`系统设置`，配置`Enable SSH`为`Lan Only`。  
-    SSH登录用户名密码与管理界面相同。
-
-1. 下载`Download Master`
-
-    在管理界面点击`USB相关应用`->点击`Download Master`下载。  
-    下载完成后，启用`Download Master`，如果不需要下载功能，此处可以卸载`Download Master`，但要保证卸载前Download Master是启用的。  
-
-1. 安装SmartDNS
-
-    将软件使用winscp上传到路由器的`/tmp/mnt/sda1`目录。（或网上邻居复制到sda1共享目录）
-
-    ```shell
-    ipkg install smartdns.xxxxxxx.mipsbig.ipk
-    ```
-
-1. 重启路由器生效服务
-
-    待路由器启动后，使用`nslookup -querytype=ptr 0.0.0.0`查询域名  
-    看命令结果中的`name`项目是否显示为`smartdns`或`主机名`，如`smartdns`则表示生效  
-
-    ```shell
-    pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr 0.0.0.0
-    Server:         192.168.1.1
-    Address:        192.168.1.1#53
-
-    Non-authoritative answer:
-    0.0.0.0.in-addr.arpa  name = smartdns.
-    ```
-
-1. 额外说明
-
-    上述过程，smartdns将安装到U盘根目录，采用optware的模式运行。
-    其目录结构如下： （此处仅列出smartdns相关文件）  
-
-    ```shell
-    U盘
-    └── asusware.mipsbig
-            ├── bin
-            ├── etc
-            |    ├── smartdns
-            |    |     └── smartdns.conf
-            |    └── init.d
-            |          └── S50smartdns
-            ├── lib
-            ├── sbin
-            ├── usr
-            |    └── sbin
-            |          └── smartdns
-            ....
-    ```
-
-    如要修改配置，可以ssh登录路由器，使用vi命令修改  
-
-    ```shell
-    vi /opt/etc/smartdns/smartdns.conf
-    ```
-
-    也可以通过网上邻居修改，网上邻居共享目录`sda1`看不到`asusware.mipsbig`目录，但可以直接在`文件管理器`中输入`asusware.mipsbig\etc\init.d`访问
-
-    ```shell
-    \\192.168.1.1\sda1\asusware.mipsbig\etc\init.d
-    ```
-
-### Windows 10 WSL安装（WSL ubuntu）
-
---------------
-
-1. 安装Windows 10 WSL ubuntu系统
-
-    安装Windows 10 WSL运行环境，发行版本选择ubuntu系统。安装步骤请参考[WSL安装说明](https://docs.microsoft.com/en-us/windows/wsl/install-win10)
-
-1. 安装smartdns
-
-    下载安装包`smartdns.xxxxxxxx.x86_64.tar.gz`，并解压到D盘根目录。解压后目录如下：
-
-    ```shell
-    D:\SMARTDNS
-    ├─etc
-    │  ├─default
-    │  ├─init.d
-    │  └─smartdns
-    ├─package
-    │  └─windows
-    ├─src
-    └─systemd
-
-    ```
-
-    双击`D:\smartdns\package\windows`目录下的`install.bat`进行安装。要求输入密码时，请输入`WLS ubuntu`的密码。
-
-1. 修改配置
-
-    记事本打开`D:\smartdns\etc\smartdns`目录中的`smartdns.conf`配置文件配置smartdns。具体配置参数参考`配置参数`说明。  
-    一般情况下，只需要增加`server [IP]:port`, `server-tcp [IP]:port`配置项，
-    尽可能配置多个上游DNS服务器，包括国内外的服务器。配置参数请查看`配置参数`章节。
-
-1. 重新加载配置
-
-    双击`D:\smartdns\package\windows`目录下的`reload.bat`进行安装。要求输入密码时，请输入`WLS ubuntu`的密码。
-
-1. 将DNS请求转发的SmartDNS解析。
-
-    将Windows的默认DNS服务器修改为`127.0.0.1`，具体步骤参考[IP配置](https://support.microsoft.com/zh-cn/help/15089/windows-change-tcp-ip-settings)
-
-1. 检测服务是否配置成功。
-
-    使用`nslookup -querytype=ptr 0.0.0.0`查询域名  
-    看命令结果中的`name`项目是否显示为`smartdns`或`主机名`，如`smartdns`则表示生效  
-
-    ```shell
-    pi@raspberrypi:~/code/smartdns_build $ nslookup -querytype=ptr 0.0.0.0
-    Server:         192.168.1.1
-    Address:        192.168.1.1#53
-
-    Non-authoritative answer:
-    0.0.0.0.in-addr.arpa  name = smartdns.
-    ```
-
-
-## 配置参数
-
-|参数|功能|默认值|配置值|例子|
-|--|--|--|--|--|
-|server-name|DNS服务器名称|操作系统主机名/smartdns|符合主机名规格的字符串|server-name smartdns
-|bind|DNS监听端口号|[::]:53|IP:PORT|bind 192.168.1.1:53
-|bind-tcp|TCP模式DNS监听端口号|[::]:53|IP:PORT|bind-tcp 192.168.1.1:53
-|cache-size|域名结果缓存个数|512|数字|cache-size 512
-|tcp-idle-time|TCP链接空闲超时时间|120|数字|tcp-idle-time 120
-|rr-ttl|域名结果TTL|远程查询结果|大于0的数字|rr-ttl 600
-|rr-ttl-min|允许的最小TTL值|远程查询结果|大于0的数字|rr-ttl-min 60
-|rr-ttl-max|允许的最大TTL值|远程查询结果|大于0的数字|rr-ttl-max 600
-|log-level|设置日志级别|error|error,warn,info,debug|log-level error
-|log-file|日志文件路径|/var/log/smartdns.log|路径|log-file /var/log/smartdns.log
-|log-size|日志大小|128K|数字+K,M,G|log-size 128K
-|log-num|日志归档个数|2|数字|log-num 2
-|audit-enable|设置审计启用|no|[yes\|no]|audit-enable yes
-|audit-file|审计文件路径|/var/log/smartdns-audit.log|路径|audit-file /var/log/smartdns-audit.log
-|audit-size|审计大小|128K|数字+K,M,G|audit-size 128K
-|audit-num|审计归档个数|2|数字|audit-num 2
-|conf-file|附加配置文件|无|文件路径|conf-file /etc/smartdns/smartdns.more.conf
-|server|上游UDP DNS|无|[ip][:port] [-blacklist-ip][-check-edns]，可重复，blacklist-ip参数指定使用blacklist-ip配置IP过滤结果| server 8.8.8.8:53 -blacklist-ip -check-edns
-|server-tcp|上游TCP DNS|无|[IP][:port] [-blacklist-ip][-check-edns]，可重复，blacklist-ip参数指定使用blacklist-ip配置IP过滤结果| server-tcp 8.8.8.8:53
-|server-tls|上游TLS DNS|无|[IP][:port] [-blacklist-ip][-check-edns]，可重复，blacklist-ip参数指定使用blacklist-ip配置IP过滤结果| server-tls 8.8.8.8:853
-|address|指定域名IP地址|无|address /domain/[ip\|-\|-4\|-6\|#\|#4\|#6], `-`表示忽略, `#`表示返回SOA, `4`表示IPV4, `6`表示IPV6| address /www.example.com/1.2.3.4
-|ipset|域名IPSET|None|ipset /domain/[ipset\|-], `-`表示忽略|ipset /www.example.com/pass
-|ipset-timeout|设置IPSET超时功能启用|auto|[yes]|ipset-timeout yes
-|bogus-nxdomain|假冒IP地址过滤|无|[ip/subnet]，可重复| bogus-nxdomain 1.2.3.4/16
-|ignore-ip|忽略IP地址|无|[ip/subnet]，可重复| ignore-ip 1.2.3.4/16
-|blacklist-ip|黑名单IP地址|无|[ip/subnet]，可重复| blacklist-ip 1.2.3.4/16
-|force-AAAA-SOA|强制AAAA地址返回SOA|no|[yes\|no]|force-AAAA-SOA yes
-|dualstack-ip-selection|双栈IP优选|no|[yes\|no]|dualstack-ip-selection yes
-|dualstack-ip-selection-threshold|双栈IP优选阈值|30ms|毫秒|dualstack-ip-selection-threshold [0-1000]
-
-## [Donate](#Donate)  
-
-如果你觉得此项目对你有帮助，请捐助我们，以使项目能持续发展，更加完善。
-
-### PayPal
-
-[![Support via PayPal](https://cdn.rawgit.com/twolfson/paypal-github-button/1.0.0/dist/button.svg)](https://paypal.me/PengNick/)
-
-### Alipay 支付宝
-
-![alipay](doc/alipay_donate.jpg)
-
-### Wechat 微信
-  
-![wechat](doc/wechat_donate.jpg)
-
-## 声明
-
-* `SmartDNS`著作权归属Nick Peng (pymumu at gmail.com)。
-* `SmartDNS`为免费软件，用户可以非商业性地复制和使用`SmartDNS`。
-* 禁止将 `SmartDNS` 用于商业用途。
-* 使用本软件的风险由用户自行承担，在适用法律允许的最大范围内，对因使用本产品所产生的损害及风险，包括但不限于直接或间接的个人损害、商业赢利的丧失、贸易中断、商业信息的丢失或任何其它经济损失，不承担任何责任。
-* 本软件不会未经用户同意收集任何用户信息。
-
-## 说明
-
-目前代码未开源，后续根据情况开源。

etc/init.d/smartdns

@@ -1,4 +1,19 @@
 #!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 ### BEGIN INIT INFO
 # Provides:        smartdns
@@ -19,14 +34,14 @@ test -x $SMARTDNS || exit 5
 
 case $1 in
 	start)
-		$SMARTDNS $SMART_DNS_OPTS
+		$SMARTDNS "$SMART_DNS_OPTS"
 		while true; do
 			if [ -e "$PIDFILE" ]; then
 				break;
 			fi
 			sleep .5
 		done
-		PID="`cat $PIDFILE 2>/dev/null`"
+		PID="$(cat $PIDFILE 2>/dev/null)"
 		if [ -z "$PID" ]; then
 			echo "start smartdns server failed."
 			exit 1
@@ -42,25 +57,25 @@ case $1 in
 			echo "smartdns server is stopped."
 			exit 0
 		fi
-		PID="`cat $PIDFILE 2>/dev/null`"
+		PID="$(cat $PIDFILE 2>/dev/null)"
 		if [ ! -e "/proc/$PID" ] || [ -z "$PID" ]; then
 			echo "smartdns server is stopped"
 			exit 0
 		fi
 
-		kill -TERM $PID
+		kill -TERM "$PID"
 		if [ $? -ne 0 ]; then
 			echo "Stop smartdns server failed."
 			exit 1;
 		fi
-		rm -f $PIDFILE
+		rm -f "$PIDFILE"
 		echo "Stop smartdns server success."
 		;;
 	restart)
-		$0 stop && sleep 1 && $0 start
+		"$0" stop && sleep 1 && "$0" start
 		;;
 	status)
-		PID="`cat $PIDFILE 2>/dev/null`"
+		PID="$(cat "$PIDFILE" 2>/dev/null)"
 		if [ ! -e "/proc/$PID" ] || [ -z "$PID" ]; then
 			echo "smartdns server is not running."
 			exit 1

etc/smartdns/smartdns.conf

@@ -1,4 +1,4 @@
-# dns server name, defaut is host name
+# dns server name, default is host name
 # server-name, 
 # example:
 #   server-name smartdns
@@ -8,14 +8,28 @@
 # conf-file [file]
 # conf-file blacklist-ip.conf
 
-# dns server bind ip and port, default dns server port is 53.
-# bind [IP]:port, udp server
-# bind-tcp [IP]:port, tcp server
+# dns server bind ip and port, default dns server port is 53, support binding multi ip and port
+# bind udp server
+#   bind [IP]:[port] [-group [group]] [-no-rule-addr] [-no-rule-nameserver] [-no-rule-ipset] [-no-speed-check] [-no-cache] [-no-rule-soa] [-no-dualstack-selection]
+# bind tcp server
+#   bind-tcp [IP]:[port] [-group [group]] [-no-rule-addr] [-no-rule-nameserver] [-no-rule-ipset] [-no-speed-check] [-no-cache] [-no-rule-soa] [-no-dualstack-selection]
+# option:
+#   -group: set domain request to use the appropriate server group.
+#   -no-rule-addr: skip address rule.
+#   -no-rule-nameserver: skip nameserver rule.
+#   -no-rule-ipset: skip ipset rule.
+#   -no-speed-check: do not check speed.
+#   -no-cache: skip cache.
+#   -no-rule-soa: Skip address SOA(#) rules.
+#   -no-dualstack-selection: Disable dualstack ip selection.
+#   -force-aaaa-soa: force AAAA query return SOA.
 # example: 
-#   IPV4: :53
-#   IPV6  [::]:53
-# bind-tcp [::]:53
-
+#  IPV4: 
+#    bind :53
+#    bind :6053 -group office -no-speed-check
+#  IPV6:
+#    bind [::]:53
+#    bind-tcp [::]:53
 bind [::]:53
 
 # tcp connection idle timeout
@@ -30,15 +44,33 @@ cache-size 512
 # prefetch-domain [yes|no]
 # prefetch-domain yes
 
+# cache serve expired 
+# serve-expired [yes|no]
+# serve-expired yes
+
+# cache serve expired TTL
+# serve-expired-ttl [num]
+# serve-expired-ttl 0
+
 # List of hosts that supply bogus NX domain results 
 # bogus-nxdomain [ip/subnet]
 
 # List of IPs that will be filtered when nameserver is configured -blacklist-ip parameter
 # blacklist-ip [ip/subnet]
 
+# List of IPs that will be accepted when nameserver is configured -whitelist-ip parameter
+# whitelist-ip [ip/subnet]
+
 # List of IPs that will be ignored
 # ignore-ip [ip/subnet]
 
+# speed check mode
+# speed-check-mode [ping|tcp:port|none|,]
+# example:
+#   speed-check-mode ping,tcp:80
+#   speed-check-mode tcp:443,ping
+#   speed-check-mode none
+
 # force AAAA query return SOA
 # force-AAAA-SOA [yes|no]
 
@@ -62,7 +94,7 @@ cache-size 512
 # rr-ttl-max 86400
 
 # set log level
-# log-level: [level], level=error, warn, info, debug
+# log-level: [level], level=fatal, error, warn, notice, info, debug
 # log-file: file path of log file.
 # log-size: size of each log file, support k,m,g
 # log-num: number of logs
@@ -72,30 +104,64 @@ log-level info
 # log-num 2
 
 # dns audit
-# audit-enable: enable or disable audit [yes|no]
+# audit-enable [yes|no]: enable or disable audit.
+# audit-enable yes
+# audit-SOA [yes|no]: enable or disable log soa result.
 # audit-size size of each audit file, support k,m,g
 # audit-file /var/log/smartdns-audit.log
 # audit-size 128k
 # audit-num 2
 
+# certificate file
+# ca-file [file]
+# ca-file /etc/ssl/certs/ca-certificates.crt
+
+# certificate path
+# ca-path [path]
+# ca-path /etc/ss/certs
+
 # remote udp dns server list
-# server [IP]:[PORT] [-blacklist-ip] [-check-edns]
+# server [IP]:[PORT] [-blacklist-ip] [-whitelist-ip] [-check-edns] [-group [group] ...] [-exclude-default-group]
 # default port is 53
 #   -blacklist-ip: filter result with blacklist ip
+#   -whitelist-ip: filter result whth whitelist ip,  result in whitelist-ip will be accepted.
 #   -check-edns: result must exist edns RR, or discard result.
-# server 8.8.8.8 -blacklist-ip -check-edns
+#   -group [group]: set server to group, use with nameserver /domain/group.
+#   -exclude-default-group: exclude this server from default group.
+# server 8.8.8.8 -blacklist-ip -check-edns -group g1 -group g2
 
 # remote tcp dns server list
-# server-tcp [IP]:[PORT] [-blacklist-ip]
+# server-tcp [IP]:[PORT] [-blacklist-ip] [-whitelist-ip] [-group [group] ...] [-exclude-default-group]
 # default port is 53
 # server-tcp 8.8.8.8
 
 # remote tls dns server list
-# server-tls [IP]:[PORT] [-blacklist-ip] [-check-edns]
+# server-tls [IP]:[PORT] [-blacklist-ip] [-whitelist-ip] [-spki-pin [sha256-pin]] [-group [group] ...] [-exclude-default-group]
+#   -spki-pin: TLS spki pin to verify.
+#   -tls-host-verify: cert hostname to verify.
+#   -host-name: TLS sni hostname.
+#   -no-check-certificate: no check certificate.
+# Get SPKI with this command:
+#    echo | openssl s_client -connect '[ip]:853' | openssl x509 -pubkey -noout | openssl pkey -pubin -outform der | openssl dgst -sha256 -binary | openssl enc -base64
 # default port is 853
 # server-tls 8.8.8.8
 # server-tls 1.0.0.1
 
+# remote https dns server list
+# server-https https://[host]:[port]/path [-blacklist-ip] [-whitelist-ip] [-spki-pin [sha256-pin]] [-group [group] ...] [-exclude-default-group]
+#   -spki-pin: TLS spki pin to verify.
+#   -tls-host-verify: cert hostname to verify.
+#   -host-name: TLS sni hostname.
+#   -http-host: http host.
+#   -no-check-certificate: no check certificate.
+# default port is 443
+# server-https https://cloudflare-dns.com/dns-query
+
+# specific nameserver to domain
+# nameserver /domain/[group|-]
+# nameserver /www.example.com/office, Set the domain name to use the appropriate server group.
+# nameserver /www.example.com/-, ignore this domain
+
 # specific address to domain
 # address /domain/[ip|-|-4|-6|#|#4|#6]
 # address /www.example.com/1.2.3.4, return ip 1.2.3.4 to client
@@ -108,4 +174,13 @@ log-level info
 # specific ipset to domain
 # ipset /domain/[ipset|-]
 # ipset /www.example.com/block, set ipset with ipset name of block 
-# ipset /www.example.com/-, ignore this domain
+# ipset /www.example.com/-, ignore this domain
+
+# set domain rules
+# domain-rules /domain/ [-speed-check-mode [...]]
+# rules:
+#   -speed-check-mode [mode]: speed check mode
+#                             speed-check-mode [ping|tcp:port|none|,]
+#   -address [address|-]: same as address option
+#   -nameserver [group|-]: same as nameserver option
+#   -ipset [ipset|-]: same as ipset option

package/build-pkg.sh

@@ -0,0 +1,182 @@
+#!/bin/sh
+# Copyright (C) 2018-2019 Nick Peng (pymumu@gmail.com)
+
+CURR_DIR=$(cd $(dirname $0);pwd)
+VER="`date +"1.%Y.%m.%d-%H%M"`"
+CODE_DIR="$CURR_DIR/.."
+IS_BUILD_SMARTDNS=1
+OUTPUTDIR=$CURR_DIR
+export CC
+export STRIP
+
+showhelp()
+{
+	echo "Usage: $0 [OPTION]"
+	echo "Options:"
+	echo " --platform [luci|luci-compat|debian|openwrt|optware|linux]    build for platform. "
+	echo " --arch [all|armhf|arm64|x86-64|...]               build for architecture, e.g. "
+	echo " --cross-tool [cross-tool]                         cross compiler, e.g. mips-openwrt-linux-"
+	echo ""
+	echo "Advance Options:"
+	echo " --static                                          static link smartdns"
+	echo " --only-package                                    only package, not build source"
+	echo " --filearch [arch]                                 output file arch, default: equal --arch"
+	echo " --outputdir [dir]                                 output package to specific directory"
+	echo " "
+	echo "Example:"
+	echo " build luci:"
+	echo "   $0 --platform luci"
+	echo " build luci:"
+	echo "   $0 --platform luci-compat"
+	echo " build debian:"
+	echo "   $0 --platform debian --arch x86-64"
+	echo " build raspbian pi:"
+	echo "   $0 --platform debian --arch armhf"
+	echo " build optware mips:"
+	echo "   $0 --platform optware --arch mipsbig"
+	echo " build openwrt mips:"
+	echo "   $0 --platform openwrt --arch mips_24kc"
+	echo " build generic linux:"
+	echo "   $0 --platform linux --arch x86-64"
+}
+
+build_smartdns()
+{
+	if [ "$PLATFORM" != "luci" ]; then
+		make -C $CODE_DIR clean $MAKE_ARGS
+		make -C $CODE_DIR all -j8 VER=$VER $MAKE_ARGS
+		if [ $? -ne 0 ]; then
+			echo "make smartdns failed"
+			exit 1
+		fi
+	fi
+
+	$STRIP -d $CODE_DIR/src/smartdns >/dev/null 2>&1
+
+	return 0
+}
+
+
+build()
+{
+	echo "build package for $PLATFORM"
+
+	if [ $IS_BUILD_SMARTDNS -eq 1 ]; then
+		build_smartdns
+		if [ $? -ne 0 ]; then
+			return 1
+		fi
+	fi
+
+	chmod +x $CODE_DIR/package/$PLATFORM/make.sh
+	$CODE_DIR/package/$PLATFORM/make.sh -o $CURR_DIR --arch $ARCH --ver $VER --filearch $FILEARCH -o $OUTPUTDIR
+	if [ $? -ne 0 ]; then
+		echo "build package for $PLATFORM failed"
+		return 1
+	fi
+
+	echo "build package for $PLATFORM success."
+	return 0
+}
+
+main()
+{
+	OPTS=`getopt -o o:h --long arch:,filearch:,ver:,platform:,cross-tool:,static,only-package,outputdir: \
+		-n  "" -- "$@"`
+
+	if [ "$#" -le "1" ]; then
+		showhelp
+		exit 1
+	fi
+
+	if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
+
+	# Note the quotes around `$TEMP': they are essential!
+	eval set -- "$OPTS"
+
+	while true; do
+		case "$1" in
+		--arch)
+			ARCH="$2"
+			shift 2;;
+		--filearch)
+			FILEARCH="$2"
+			shift 2;;
+		--platform)
+			PLATFORM="$2"
+			shift 2;;
+		--cross-tool)
+			CROSS_TOOL="$2"
+			shift 2;;
+		--static)
+			export STATIC="yes"
+			shift 1;;
+		--only-package)
+			IS_BUILD_SMARTDNS=0
+			shift 1;;
+		--outputdir)
+			OUTPUTDIR="$2"
+			shift 2;;
+		--ver)
+			VER="$2"
+			shift 2;;
+		-h | --help )
+			showhelp
+			return 0
+			shift ;;
+		-- ) shift; break ;;
+		* ) break ;;
+		esac
+	done
+
+	if [ -z "$PLATFORM" ]; then
+		echo "please input platform"
+		echo "run $0 -h for help."
+		return 1
+	fi
+	
+	if [ "$PLATFORM" = "luci" ]; then
+		ARCH="all"
+	fi
+
+	if [ -z "$ARCH" ]; then
+		echo "please input arch."
+		echo "run $0 -h for help."
+		return 1
+	fi
+
+	if [ -z "$FILEARCH" ]; then 
+		FILEARCH="$ARCH"
+	fi
+
+	if [ -z "$OUTPUTDIR" ]; then
+		OUTPUTDIR=$CURR_DIR
+	fi
+
+	if [ ! -z "$CROSS_TOOL" ]; then
+		CC="${CROSS_TOOL}gcc"
+		STRIP="${CROSS_TOOL}strip"
+	fi
+
+	if [ -z "$CC" ]; then
+		CC="gcc"
+	fi
+
+	if [ -z "$STRIP" ]; then
+		if [ ! -z "`echo $CC | grep '\-gcc'`" ]; then
+			STRIP="`echo "$CC" | sed 's/-gcc\$/-strip/g'`"
+		else
+			STRIP="strip"
+		fi
+	fi
+
+	if [ ! -e "`which $CC`" ]; then
+		echo "Cannot find compiler $CC"
+		return 1
+	fi
+
+	build
+}
+
+main $@
+exit $?

package/debian/DEBIAN/copyright

@@ -3,5 +3,5 @@ Upstream-Name: smartdns
 Source: http://github.com/pymumu/smartdns
 
 Files: *
-Copyright: 2018 Nick peng
+Copyright: 2018-2019 Nick peng
 License: proprietary

package/debian/make.sh

@@ -1,5 +1,19 @@
-#/bin/sh
-
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 CURR_DIR=$(cd $(dirname $0);pwd)
 VER="`date +"1.%Y.%m.%d-%H%M"`"
 SMARTDNS_DIR=$CURR_DIR/../../
@@ -11,42 +25,46 @@ showhelp()
 	echo "Options:"
 	echo " -o               output directory."
 	echo " --arch           archtecture."
-    echo " --ver            version."
+	echo " --ver            version."
 	echo " -h               show this message."
 }
 
 build()
 {
-    ROOT=/tmp/smartdns-deiban
-    rm -fr $ROOT
-    mkdir -p $ROOT
-    cd $ROOT/
+	ROOT=/tmp/smartdns-deiban
+	rm -fr $ROOT
+	mkdir -p $ROOT
+	cd $ROOT/
 
-    cp $CURR_DIR/DEBIAN $ROOT/ -af
-    CONTROL=$ROOT/DEBIAN/control
-    mkdir $ROOT/usr/sbin -p
-    mkdir $ROOT/etc/smartdns/ -p
-    mkdir $ROOT/etc/default/ -p
-    mkdir $ROOT/lib/systemd/system/ -p
+	cp $CURR_DIR/DEBIAN $ROOT/ -af
+	CONTROL=$ROOT/DEBIAN/control
+	mkdir $ROOT/usr/sbin -p
+	mkdir $ROOT/etc/smartdns/ -p
+	mkdir $ROOT/etc/default/ -p
+	mkdir $ROOT/lib/systemd/system/ -p
 
-    sed -i "s/Version:.*/Version: $VER/" $ROOT/DEBIAN/control
-    sed -i "s/Architecture:.*/Architecture: $ARCH/" $ROOT/DEBIAN/control
-    chmod 0755 $ROOT/DEBIAN/prerm
+	sed -i "s/Version:.*/Version: $VER/" $ROOT/DEBIAN/control
+	sed -i "s/Architecture:.*/Architecture: $ARCH/" $ROOT/DEBIAN/control
+	chmod 0755 $ROOT/DEBIAN/prerm
 
-    cp $SMARTDNS_DIR/etc/smartdns/smartdns.conf  $ROOT/etc/smartdns/
-    cp $SMARTDNS_DIR/etc/default/smartdns  $ROOT/etc/default/
-    cp $SMARTDNS_DIR/systemd/smartdns.service $ROOT/lib/systemd/system/ 
-    cp $SMARTDNS_DIR/src/smartdns $ROOT/usr/sbin
-    chmod +x $ROOT/usr/sbin/smartdns
+	cp $SMARTDNS_DIR/etc/smartdns/smartdns.conf  $ROOT/etc/smartdns/
+	cp $SMARTDNS_DIR/etc/default/smartdns  $ROOT/etc/default/
+	cp $SMARTDNS_DIR/systemd/smartdns.service $ROOT/lib/systemd/system/ 
+	cp $SMARTDNS_DIR/src/smartdns $ROOT/usr/sbin
+	if [ $? -ne 0 ]; then
+		echo "copy smartdns file failed."
+		return 1
+	fi
+	chmod +x $ROOT/usr/sbin/smartdns
 
-    dpkg -b $ROOT $OUTPUTDIR/smartdns.$VER.$ARCH.deb
+	dpkg -b $ROOT $OUTPUTDIR/smartdns.$VER.$FILEARCH.deb
 
-    rm -fr $ROOT/
+	rm -fr $ROOT/
 }
 
 main()
 {
-	OPTS=`getopt -o o:h --long arch:,ver: \
+	OPTS=`getopt -o o:h --long arch:,ver:,filearch: \
 		-n  "" -- "$@"`
 
 	if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
@@ -59,31 +77,38 @@ main()
 		--arch)
 			ARCH="$2"
 			shift 2;;
-        --ver)
-            VER="$2"
-            shift 2;;
+		--filearch)
+			FILEARCH="$2"
+			shift 2;;
+		--ver)
+			VER="$2"
+			shift 2;;
 		-o )
 			OUTPUTDIR="$2"
 			shift 2;;
-        -h | --help )
+		-h | --help )
 			showhelp
 			return 0
 			shift ;;
 		-- ) shift; break ;;
 		* ) break ;;
-  		esac
+		esac
 	done
 
-    if [ -z "$ARCH" ]; then
-        echo "please input arch."
-        return 1;
-    fi
+	if [ -z "$ARCH" ]; then
+		echo "please input arch."
+		return 1;
+	fi
 
-    if [ -z "$OUTPUTDIR" ]; then
-        OUTPUTDIR=$CURR_DIR;
-    fi
+	if [ -z "$FILEARCH" ]; then
+		FILEARCH=$ARCH
+	fi
 
-    build
+	if [ -z "$OUTPUTDIR" ]; then
+		OUTPUTDIR=$CURR_DIR;
+	fi
+
+	build
 }
 
 main $@

package/linux/install

@@ -1,7 +1,19 @@
 #!/bin/sh
 #
-# Copyright (C) 2018 Ruilin Peng (Nick) <pymumu@gmail.com>
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
 #
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 INST_DIR=$(cd $(dirname $0);pwd)
 ISWSL=1 # 1 means not WSL, 0 means wsl 
@@ -53,7 +65,7 @@ clean_service()
 
 get_systemd_path()
 {
-	service="`systemctl --no-legend| grep .service | head -n 1 | awk '{print $1}'`"
+	service="`systemctl --no-legend| grep '\.service' | head -n 1 | awk '{print $1}'`"
 	SERVICE_PATH="`systemctl show $service | grep FragmentPath | awk -F'=' '{print $2}'`"
 	dirname $SERVICE_PATH
 }
@@ -65,14 +77,18 @@ install_files()
 		return 1
 	fi
 
-	install -v -m 0755 -t $PREFIX/usr/sbin src/smartdns
+	install -v -m 0755 -t $PREFIX/usr/sbin usr/sbin/smartdns
 	if [ $? -ne 0 ]; then
 		return 1
 	fi
 
-	install -v -m 0640 -t  $PREFIX$SMARTDNS_CONF_DIR etc/smartdns/smartdns.conf
-	if [ $? -ne 0 ]; then
-		return 1
+	if [ -e "$PREFIX$SMARTDNS_CONF_DIR/smartdns.conf" ]; then
+		cp etc/smartdns/smartdns.conf $PREFIX$SMARTDNS_CONF_DIR/smartdns.conf.pkg
+	else 
+		install -v -m 0640 -t  $PREFIX$SMARTDNS_CONF_DIR etc/smartdns/smartdns.conf
+		if [ $? -ne 0 ]; then
+			return 1
+		fi
 	fi
 
 	install -v -m 0640 -t  $PREFIX/etc/default etc/default/smartdns
@@ -82,7 +98,9 @@ install_files()
 	
 	install -v -m 0755 -t $SMARTDNS_INIT_DIR etc/init.d/smartdns 
 	if [ $? -ne 0 ]; then
-		return 1
+		if [ $ISSYSTEMD -ne 0 ]; then
+			return 1
+		fi
 	fi
 
 	if [ $ISSYSTEMD -eq 0 ]; then
@@ -104,7 +122,6 @@ uninstall_smartdns()
 	if [ -z "$PREFIX" ]; then
 		stop_service 2>/dev/null
 	fi	
-	rm -f $PREFIX$SMARTDNS_CONF_DIR/smartdns.conf
 	rmdir $PREFIX$SMARTDNS_CONF_DIR 2>/dev/null
 	rm -f $PREFIX/usr/sbin/smartdns
 	rm -f $PREFIX/etc/default/smartdns

package/linux/make.sh

@@ -0,0 +1,103 @@
+#!/bin/sh
+
+CURR_DIR=$(cd $(dirname $0);pwd)
+VER="`date +"1.%Y.%m.%d-%H%M"`"
+SMARTDNS_DIR=$CURR_DIR/../../
+SMARTDNS_BIN=$SMARTDNS_DIR/src/smartdns
+
+showhelp()
+{
+	echo "Usage: make [OPTION]"
+	echo "Options:"
+	echo " -o               output directory."
+	echo " --arch           archtecture."
+	echo " --ver            version."
+	echo " -h               show this message."
+}
+
+build()
+{
+	PKG_ROOT=/tmp/smartdns-linux
+	rm -fr $PKG_ROOT
+	mkdir -p $PKG_ROOT/smartdns
+	cd $PKG_ROOT/
+
+	# Generic x86_64
+	mkdir $PKG_ROOT/smartdns/usr/sbin -p
+	mkdir $PKG_ROOT/smartdns/package -p
+	mkdir $PKG_ROOT/smartdns/systemd -p 
+	
+	cd $SMARTDNS_DIR
+	cp package/windows $PKG_ROOT/smartdns/package/ -a
+	cp etc *.md LICENSE package/linux/install $PKG_ROOT/smartdns/ -a
+	cp systemd/smartdns.service $PKG_ROOT/smartdns/systemd
+	cp src/smartdns $PKG_ROOT/smartdns/usr/sbin -a
+	chmod +x $PKG_ROOT/smartdns/install
+
+	if [ $? -ne 0 ]; then
+		echo "copy smartdns file failed"
+		rm -fr $PKG_ROOT
+		exit 1
+	fi
+	cd $PKG_ROOT
+	tar  zcf $OUTPUTDIR/smartdns.$VER.$FILEARCH.tar.gz smartdns
+	if [ $? -ne 0 ]; then
+		echo "create package failed"
+		rm -fr $PKG_ROOT
+		exit 1
+	fi
+	cd $CURR_DIR
+	rm -fr $PKG_ROOT
+}
+
+main()
+{
+	OPTS=`getopt -o o:h --long arch:,ver:,filearch: \
+		-n  "" -- "$@"`
+
+	if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
+
+	# Note the quotes around `$TEMP': they are essential!
+	eval set -- "$OPTS"
+
+	while true; do
+		case "$1" in
+		--arch)
+			ARCH="$2"
+			shift 2;;
+		--filearch)
+			FILEARCH="$2"
+			shift 2;;
+		--ver)
+			VER="$2"
+			shift 2;;
+		-o )
+			OUTPUTDIR="$2"
+			shift 2;;
+		-h | --help )
+			showhelp
+			return 0
+			shift ;;
+		-- ) shift; break ;;
+		* ) break ;;
+  		esac
+	done
+
+	if [ -z "$ARCH" ]; then
+		echo "please input arch."
+		return 1;
+	fi
+
+	if [ -z "$FILEARCH" ]; then
+		FILEARCH=$ARCH
+	fi
+
+	if [ -z "$OUTPUTDIR" ]; then
+		OUTPUTDIR=$CURR_DIR;
+	fi
+
+	build
+}
+
+main $@
+exit $?

package/luci-compat/control/control

@@ -0,0 +1,7 @@
+Package: luci-app-smartdns
+Version: git-18.201.27126-7bf0367-1
+Depends: libc, smartdns
+Source: feeds/luci/applications/luci-app-smartdns
+Section: luci
+Architecture: all
+Description:  A smartdns server

package/luci-compat/control/postinst

@@ -0,0 +1,21 @@
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+[ "${IPKG_NO_SCRIPT}" = "1" ] && exit 0
+[ -x ${IPKG_INSTROOT}/lib/functions.sh ] || exit 0
+. ${IPKG_INSTROOT}/lib/functions.sh
+default_postinst $0 $@

package/luci-compat/control/postinst-pkg

@@ -0,0 +1,4 @@
+[ -n "${IPKG_INSTROOT}" ] || {
+	(. /etc/uci-defaults/50_luci-smartdns) && rm -f /etc/uci-defaults/50_luci-smartdns
+	exit 0
+}

package/luci-compat/control/prerm

@@ -0,0 +1,20 @@
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+[ -x ${IPKG_INSTROOT}/lib/functions.sh ] || exit 0
+. ${IPKG_INSTROOT}/lib/functions.sh
+default_prerm $0 $@

package/luci-compat/debian-binary

@@ -0,0 +1 @@
+2.0

package/luci-compat/files/etc/uci-defaults/50_luci-smartdns

@@ -0,0 +1,26 @@
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+uci -q batch <<-EOF >/dev/null
+	delete ucitrack.@smartdns[-1]
+	add ucitrack smartdns
+	set ucitrack.@smartdns[-1].init=smartdns
+	commit ucitrack
+EOF
+
+rm -f /tmp/luci-indexcache
+exit 0

package/luci-compat/files/luci/controller/smartdns.lua

@@ -1,4 +1,18 @@
--- Copyright 2018 Nick Peng (pymumu@gmail.com)
+--
+-- Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+--
+-- smartdns is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- smartdns is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 module("luci.controller.smartdns", package.seeall)
 local smartdns = require "luci.model.smartdns"

package/luci-compat/files/luci/i18n/smartdns.zh-cn.po

@@ -0,0 +1,299 @@
+msgid ""
+msgstr "Content-Type: text/plain; charset=UTF-8\n"
+
+msgid "SmartDNS"
+msgstr "SmartDNS"
+
+msgid "SmartDNS is a local high-performance DNS server"
+msgstr "SmartDNS是一个本地高性能DNS服务器"
+
+msgid "SmartDNS Server"
+msgstr "SmartDNS 服务器"
+
+msgid "SmartDNS is a local high-performance DNS server, supports finding fastest IP, supports ad filtering, and supports avoiding DNS poisoning."
+msgstr "SmartDNS是一个本地高性能DNS服务器，支持返回最快IP，支持广告过滤。"
+
+msgid "Custom Settings"
+msgstr "自定义设置"
+
+msgid "General Settings"
+msgstr "基本设置"
+
+msgid "Settings"
+msgstr "设置"
+
+msgid "Advanced Settings"
+msgstr "高级设置"
+
+msgid "Generate Coredump"
+msgstr "生成coredump"
+
+msgid "Generate Coredump file when smartdns crash, coredump file is located at /tmp/smartdns.xxx.core."
+msgstr "当smartdns异常时生成coredump文件，coredump文件在/tmp/smartdns.xxx.core."
+
+msgid "Server Name"
+msgstr "服务器名称"
+
+msgid "Smartdns server name"
+msgstr "SmartDNS的服务器名称，默认为smartdns，留空为主机名"
+
+msgid "SmartDNS is a local dns server to find fastest ip."
+msgstr "本地高性能服务器，优化网络访问性能。"
+
+msgid "Enable or disable smartdns server"
+msgstr "启用或禁用SmartDNS服务"
+
+msgid "Local Port"
+msgstr "本地端口"
+
+msgid "Smartdns local server port"
+msgstr "SmartDNS本地服务端口"
+
+msgid "IPV4 53 Port Redirect Failure"
+msgstr "IPV4 53端口重定向失败"
+
+msgid "IPV6 53 Port Redirect Failure"
+msgstr "IPV6 53端口重定向失败"
+
+msgid "Dnsmasq Forwared To Smartdns Failure"
+msgstr "重定向dnsmasq到smartdns失败"
+
+msgid "TCP Server"
+msgstr "TCP服务器"
+
+msgid "Enable TCP DNS Server"
+msgstr "启用TCP服务器"
+
+msgid "IPV6 Server"
+msgstr "IPV6服务器"
+
+msgid "Enable IPV6 DNS Server"
+msgstr "启用IPV6服务器"
+
+msgid "Dual-stack IP Selection"
+msgstr "双栈IP优选"
+
+msgid "Enable IP selection between IPV4 and IPV6"
+msgstr "启用或禁用IPV4，IPV6间的IP优选策略。"
+
+msgid "Domain prefetch"
+msgstr "域名预加载"
+
+msgid "Enable domain prefetch, accelerate domain response speed."
+msgstr "启用域名预加载，加速域名响应速度。"
+
+msgid "Serve expired"
+msgstr "过期缓存服务"
+
+msgid "Attempts to serve old responses from cache with a TTL of 0 in the response without waiting for the actual resolution to finish."
+msgstr "查询性能优化，有请求时尝试回应TTL为0的过期记录，以避免查询等待。"
+
+msgid "Redirect"
+msgstr "重定向"
+
+msgid "SmartDNS redirect mode"
+msgstr "SmartDNS 重定向模式"
+
+msgid "Run as dnsmasq upstream server"
+msgstr "作为dnsmasq的上游服务器"
+
+msgid "Redirect 53 port to SmartDNS"
+msgstr "重定向53端口到SmartDNS"
+
+msgid "Cache Size"
+msgstr "缓存大小"
+
+msgid "DNS domain result cache size"
+msgstr "缓存DNS的结果，缓存大小，配置零则不缓存"
+
+msgid "Domain TTL"
+msgstr "域名TTL"
+
+msgid "TTL for all domain result."
+msgstr "设置所有域名的TTL值"
+
+msgid "Domain TTL Min"
+msgstr "域名TTL最小值"
+
+msgid "Minimum TTL for all domain result."
+msgstr "设置所有域名的TTL最小值"
+
+msgid "Domain TTL Max"
+msgstr "域名TTL最大值"
+
+msgid "Maximum TTL for all domain result."
+msgstr "设置所有域名的TTL最大值"
+
+msgid "smartdns custom settings"
+msgstr "smartdns 自定义设置，具体配置参数参考指导"
+
+msgid "Second Server Settings"
+msgstr "第二DNS服务器"
+
+msgid "Enable or disable second DNS server."
+msgstr "是否启用第二DNS服务器。"
+
+msgid "Skip Speed Check"
+msgstr "跳过测速"
+
+msgid "Do not check speed."
+msgstr "禁用测速。"
+
+msgid "Server Group"
+msgstr "服务器组"
+
+msgid "Query DNS through specific dns server group, such as office, home."
+msgstr "使用指定服务器组查询，比如office, home。"
+
+msgid "Skip Address Rules"
+msgstr "跳过address规则"
+
+msgid "Skip address rules."
+msgstr "跳过address规则。"
+
+msgid "Skip Nameserver Rule"
+msgstr "跳过Nameserver规则"
+
+msgid "Skip nameserver rules."
+msgstr "跳过Nameserver规则。"
+
+msgid "Skip Ipset Rule"
+msgstr "跳过ipset规则"
+
+msgid "Skip ipset rules."
+msgstr "跳过ipset规则。"
+
+msgid "Skip SOA Address Rule"
+msgstr "跳过address SOA(#)规则"
+
+msgid "Skip SOA address rules."
+msgstr "跳过address SOA(#)规则。"
+
+msgid "Skip Dualstack Selection"
+msgstr "跳过双栈优选"
+
+msgid "Skip Dualstack Selection."
+msgstr "跳过双栈优选。"
+
+msgid "Skip Cache"
+msgstr "跳过cache"
+
+msgid "Skip Cache."
+msgstr "跳过cache。"
+
+msgid "Upstream Servers"
+msgstr "上游服务器"
+
+msgid "Upstream Servers, support UDP, TCP protocol. Please configure multiple DNS servers, including multiple foreign DNS servers."
+msgstr "上游DNS服务器列表，支持UDP，TCP协议，请配置多个上游DNS服务器，包括多个国内外服务器"
+
+msgid "DNS Server Name"
+msgstr "DNS服务器名称"
+
+msgid "port"
+msgstr "端口"
+
+msgid "DNS Server port"
+msgstr "DNS服务器端口"
+
+msgid "DNS Server ip"
+msgstr "DNS服务器IP"
+
+msgid "type"
+msgstr "类型"
+
+msgid "DNS Server type"
+msgstr "协议类型"
+
+msgid "Domain Address"
+msgstr "域名地址"
+
+msgid "TLS Hostname Verify"
+msgstr "校验TLS主机名"
+
+msgid "Set TLS hostname to verify."
+msgstr "设置校验TLS主机名。"
+
+msgid "No check certificate"
+msgstr "停用证书校验"
+
+msgid "Do not check certificate."
+msgstr "不校验证书的合法性。"
+
+msgid "TLS SNI name"
+msgstr "TLS SNI名称"
+
+msgid "HTTP Host"
+msgstr "HTTP主机"
+
+msgid "Sets the server name indication for query."
+msgstr "设置查询时使用的服务器SNI名称。"
+
+msgid "Set the HTTP host used for the query. Use this parameter when the host of the URL address is an IP address."
+msgstr "设置查询时使用的HTTP主机，当URL地址的host是IP地址时，使用此参数。"
+
+msgid "Server Group"
+msgstr "服务器组"
+
+msgid "DNS Server group belongs to, used with nameserver, such as office, home."
+msgstr "DNS服务器所属组， 配合nameserver使用，例如：office，home。"
+
+msgid "IP Blacklist Filtering"
+msgstr "IP黑名单过滤"
+
+msgid "Anti Answer Forgery"
+msgstr "反回答伪造"
+
+msgid "Anti answer forgery, if DNS does not work properly after enabling, please turn off this feature"
+msgstr "反回答伪造，如果启用后DNS工作不正常，请关闭此功能。"
+
+msgid "Filtering IP with blacklist"
+msgstr "使用IP黑名单过滤"
+
+msgid "TLS SPKI Pinning"
+msgstr "TLS SPKI 指纹"
+
+msgid "Used to verify the validity of the TLS server, The value is Base64 encoded SPKI fingerprint, leaving blank to indicate that the validity of TLS is not verified."
+msgstr "用于校验TLS服务器的有效性，数值为Base64编码的SPKI指纹, 留空表示不验证TLS的合法性"
+
+msgid "Additional Server Args"
+msgstr "额外的服务器参数"
+
+msgid "Additional Args for upstream dns servers"
+msgstr "额外的上游DNS服务器参数"
+
+msgid "Upstream DNS Server Configuration"
+msgstr "上游DNS服务器配置"
+
+msgid "Set Specific domain ip address."
+msgstr "指定特定域名的IP地址"
+
+msgid "Specify an IP address to return for any host in the given domains, Queries in the domains are never forwarded and always replied to with the specified IP address which may be IPv4 or IPv6."
+msgstr "配置特定域名返回特定的IP地址，域名查询将不到上游服务器请求，直接返回配置的IP地址，可用于广告屏蔽。"
+
+msgid "IP Blacklist"
+msgstr "IP黑名单"
+
+msgid "Set Specific ip blacklist."
+msgstr "设置IP黑名单列表"
+
+msgid "Configure IP blacklists that will be filtered from the results of specific DNS server."
+msgstr "配置需要从指定域名服务器结果过滤的IP黑名单。"
+
+msgid "Technical Support"
+msgstr "技术支持"
+
+msgid "If you like this software, please buy me a cup of coffee."
+msgstr "如果本软件对你有帮助，请给作者加个蛋。"
+
+msgid "SmartDNS official website"
+msgstr "SmartDNS官方网站"
+
+msgid "open website"
+msgstr "打开网站"
+
+msgid "Donate to smartdns"
+msgstr "捐助smartdns项目"
+
+msgid "Donate"
+msgstr "捐助"

package/luci-compat/files/luci/model/cbi/smartdns/smartdns.lua

@@ -1,4 +1,18 @@
--- Copyright 2018 Nick Peng (pymumu@gmail.com)
+--
+-- Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+--
+-- smartdns is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- smartdns is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 require ("nixio.fs")
 require ("luci.http")
@@ -16,6 +30,7 @@ s = m:section(TypedSection, "smartdns", translate("Settings"), translate("Genera
 s.anonymous = true
 
 s:tab("settings", translate("General Settings"))
+s:tab("seconddns", translate("Second Server Settings"))
 s:tab("custom", translate("Custom Settings"))
 
 ---- Eanble
@@ -68,6 +83,15 @@ o.cfgvalue    = function(...)
     return Flag.cfgvalue(...) or "0"
 end
 
+---- Domain Serve expired
+o = s:taboption("settings", Flag, "serve_expired", translate("Serve expired"), 
+	translate("Attempts to serve old responses from cache with a TTL of 0 in the response without waiting for the actual resolution to finish."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
 ---- Redirect
 o = s:taboption("settings", ListValue, "redirect", translate("Redirect"), translate("SmartDNS redirect mode"))
 o.placeholder = "none"
@@ -92,10 +116,100 @@ o.placeholder = "300"
 o.default     = 300
 o.optional    = true
 
+---- second dns server
 ---- rr-ttl-max
 o = s:taboption("settings", Value, "rr_ttl_max", translate("Domain TTL Max"), translate("Maximum TTL for all domain result."))
 o.rempty      = true
 
+---- Eanble
+o = s:taboption("seconddns", Flag, "seconddns_enabled", translate("Enable"), translate("Enable or disable second DNS server."))
+o.default     = o.disabled
+o.rempty      = false
+
+---- Port
+o = s:taboption("seconddns", Value, "seconddns_port", translate("Local Port"), translate("Smartdns local server port"))
+o.placeholder = 6553
+o.default     = 6553
+o.datatype    = "port"
+o.rempty      = false
+
+---- Enable TCP server
+o = s:taboption("seconddns", Flag, "seconddns_tcp_server", translate("TCP Server"), translate("Enable TCP DNS Server"))
+o.rmempty     = false
+o.default     = o.enabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "1"
+end
+
+---- dns server group
+o = s:taboption("seconddns", Value, "seconddns_server_group", translate("Server Group"), translate("Query DNS through specific dns server group, such as office, home."))
+o.rmempty     = true
+o.placeholder = "default"
+o.datatype    = "hostname"
+o.rempty      = true
+
+o = s:taboption("seconddns", Flag, "seconddns_no_speed_check", translate("Skip Speed Check"), translate("Do not check speed."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
+---- skip address rules
+o = s:taboption("seconddns", Flag, "seconddns_no_rule_addr", translate("Skip Address Rules"), translate("Skip address rules."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
+---- skip name server rules
+o = s:taboption("seconddns", Flag, "seconddns_no_rule_nameserver", translate("Skip Nameserver Rule"), translate("Skip nameserver rules."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
+---- skip ipset rules
+o = s:taboption("seconddns", Flag, "seconddns_no_rule_ipset", translate("Skip Ipset Rule"), translate("Skip ipset rules."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
+---- skip soa address rule
+o = s:taboption("seconddns", Flag, "seconddns_no_rule_soa", translate("Skip SOA Address Rule"), translate("Skip SOA address rules."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
+o = s:taboption("seconddns", Flag, "seconddns_no_dualstack_selection", translate("Skip Dualstack Selection"), translate("Skip Dualstack Selection."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
+---- skip cache
+o = s:taboption("seconddns", Flag, "seconddns_no_cache", translate("Skip Cache"), translate("Skip Cache."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
+---- Force AAAA SOA
+o = s:taboption("seconddns", Flag, "force_aaaa_soa", translate("Force AAAA SOA"), translate("Force AAAA SOA."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
 ----- custom settings
 custom = s:taboption("custom", Value, "Custom Settings",
 	translate(""), 
@@ -142,13 +256,16 @@ s:option(Value, "name", translate("DNS Server Name"), translate("DNS Server Name
 
 ---- IP address
 o = s:option(Value, "ip", translate("ip"), translate("DNS Server ip"))
-o.datatype = "ipaddr"
+o.datatype = "or(ipaddr, string)"
 o.rmempty = false 
 ---- port
 o = s:option(Value, "port", translate("port"), translate("DNS Server port"))
 o.placeholder = "default"
 o.datatype    = "port"
 o.rempty      = true
+o:depends("type", "udp")
+o:depends("type", "tcp")
+o:depends("type", "tls")
 
 ---- type
 o = s:option(ListValue, "type", translate("type"), translate("DNS Server type"))
@@ -156,16 +273,18 @@ o.placeholder = "udp"
 o:value("udp", translate("udp"))
 o:value("tcp", translate("tcp"))
 o:value("tls", translate("tls"))
+o:value("https", translate("https"))
 o.default     = "udp"
 o.rempty      = false
 
--- Doman addresss
-s = m:section(TypedSection, "smartdns", translate("Domain Address"), 
-	translate("Set Specific domain ip address."))
-s.anonymous = true
+s = m:section(TypedSection, "smartdns", translate("Advanced Settings"), translate("Advanced Settings"));
+s.anonymous = true;
 
----- address
-addr = s:option(Value, "address",
+s:tab("domain-address", translate("Domain Address"), translate("Set Specific domain ip address."));
+s:tab("blackip-list", translate("IP Blacklist"), translate("Set Specific ip blacklist."));
+
+-- Doman addresss
+addr = s:taboption("domain-address", Value, "address",
 	translate(""), 
 	translate("Specify an IP address to return for any host in the given domains, Queries in the domains are never forwarded and always replied to with the specified IP address which may be IPv4 or IPv6."))
 
@@ -182,12 +301,7 @@ function addr.write(self, section, value)
 end
 
 -- IP Blacklist
-s = m:section(TypedSection, "smartdns", translate("IP Blacklist"), 
-	translate("Set Specific ip blacklist."))
-s.anonymous = true
-
----- blacklist
-addr = s:option(Value, "blacklist_ip",
+addr = s:taboption("blackip-list", Value, "blacklist_ip",
 	translate(""), 
 	translate("Configure IP blacklists that will be filtered from the results of specific DNS server."))
 
@@ -203,7 +317,7 @@ function addr.write(self, section, value)
 	nixio.fs.writefile("/etc/smartdns/blacklist-ip.conf", value)
 end
 
--- Doman addresss
+-- Technical Support
 s = m:section(TypedSection, "smartdns", translate("Technical Support"), 
 	translate("If you like this software, please buy me a cup of coffee."))
 s.anonymous = true

package/luci-compat/files/luci/model/cbi/smartdns/upstream.lua

@@ -0,0 +1,129 @@
+--
+-- Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+--
+-- smartdns is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- smartdns is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+local sid = arg[1]
+
+m = Map("smartdns", "%s - %s" %{translate("SmartDNS Server"), translate("Upstream DNS Server Configuration")})
+m.redirect = luci.dispatcher.build_url("admin/services/smartdns")
+
+if m.uci:get("smartdns", sid) ~= "server" then
+	luci.http.redirect(m.redirect)
+	return
+end
+
+-- [[ Edit Server ]]--
+s = m:section(NamedSection, sid, "server")
+s.anonymous = true
+s.addremove   = false
+
+---- name
+s:option(Value, "name", translate("DNS Server Name"), translate("DNS Server Name"))
+
+---- IP address
+o = s:option(Value, "ip", translate("ip"), translate("DNS Server ip"))
+o.datatype = "or(host, string)"
+o.rmempty = false 
+---- port
+o = s:option(Value, "port", translate("port"), translate("DNS Server port"))
+o.placeholder = "default"
+o.datatype    = "port"
+o.rempty      = true
+o:depends("type", "udp")
+o:depends("type", "tcp")
+o:depends("type", "tls")
+
+---- type
+o = s:option(ListValue, "type", translate("type"), translate("DNS Server type"))
+o.placeholder = "udp"
+o:value("udp", translate("udp"))
+o:value("tcp", translate("tcp"))
+o:value("tls", translate("tls"))
+o:value("https", translate("https"))
+o.default     = "udp"
+o.rempty      = false
+
+---- server group
+o = s:option(Value, "server_group", translate("Server Group"), translate("DNS Server group belongs to, used with nameserver, such as office, home."))
+o.rmempty     = true
+o.placeholder = "default"
+o.datatype    = "hostname"
+o.rempty      = true
+
+---- blacklist_ip
+o = s:option(Flag, "blacklist_ip", translate("IP Blacklist Filtering"), translate("Filtering IP with blacklist"))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
+---- TLS host verify
+o = s:option(Value, "tls_host_verify", translate("TLS Hostname Verify"), translate("Set TLS hostname to verify."))
+o.default     = ""
+o.datatype    = "string"
+o.rempty      = true
+o:depends("type", "tls")
+o:depends("type", "https")
+
+---- certificate verify
+o = s:option(Flag, "no_check_certificate", translate("No check certificate"), translate("Do not check certificate."))
+o.rmempty     = false
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+o:depends("type", "tls")
+o:depends("type", "https")
+
+---- SNI host name
+o = s:option(Value, "host_name", translate("TLS SNI name"), translate("Sets the server name indication for query."))
+o.default     = ""
+o.datatype    = "hostname"
+o.rempty      = true
+o:depends("type", "tls")
+o:depends("type", "https")
+
+---- http host
+o = s:option(Value, "http_host", translate("HTTP Host"), translate("Set the HTTP host used for the query. Use this parameter when the host of the URL address is an IP address."))
+o.default     = ""
+o.datatype    = "hostname"
+o.rempty      = true
+o:depends("type", "https")
+
+---- anti-Answer-Forgery
+-- o = s:option(Flag, "check_edns", translate("Anti Answer Forgery"), translate("Anti answer forgery, if DNS does not work properly after enabling, please turn off this feature"))
+-- o.rmempty     = false
+-- o.default     = o.disabled
+-- o:depends("type", "udp")
+-- o.cfgvalue    = function(...)
+--     return Flag.cfgvalue(...) or "0"
+-- end
+
+---- SPKI pin
+o = s:option(Value, "spki_pin", translate("TLS SPKI Pinning"), translate("Used to verify the validity of the TLS server, The value is Base64 encoded SPKI fingerprint, leaving blank to indicate that the validity of TLS is not verified."))
+o.default     = ""
+o.datatype    = "string"
+o.rempty      = true
+o:depends("type", "tls")
+o:depends("type", "https")
+
+---- other args
+o = s:option(Value, "addition_arg", translate("Additional Server Args"), translate("Additional Args for upstream dns servers"))
+o.default     = ""
+o.rempty      = true
+o.optional    = true
+
+return m

package/luci-compat/files/luci/model/smartdns.lua

@@ -0,0 +1,31 @@
+--
+-- Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+--
+-- smartdns is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- smartdns is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+require ("nixio.fs")
+require ("luci.http")
+require ("luci.dispatcher")
+require ("nixio.fs")
+
+local uci = require "luci.model.uci".cursor()
+
+module("luci.model.smartdns", package.seeall)
+
+function get_config_option(module, section, option, default)
+	return uci:get_first(module, section, option) or default
+end
+
+return m
+

package/luci-compat/make.sh

@@ -0,0 +1,135 @@
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+CURR_DIR=$(cd $(dirname $0);pwd)
+
+VER="`date +"1.%Y.%m.%d-%H%M"`"
+SMARTDNS_DIR=$CURR_DIR/../../
+PO2LMO=
+
+showhelp()
+{
+	echo "Usage: make [OPTION]"
+	echo "Options:"
+	echo " -o               output directory."
+	echo " --arch           archtecture."
+	echo " --ver            version."
+	echo " -h               show this message."
+}
+
+build_tool()
+{
+	make -C $ROOT/tool/po2lmo -j 
+	PO2LMO="$ROOT/tool/po2lmo/src/po2lmo"
+
+}
+
+clean_tool()
+{
+	make -C $ROOT/tool/po2lmo clean
+}
+
+build()
+{
+
+	ROOT=/tmp/luci-app-smartdns
+	rm -fr $ROOT
+
+	mkdir -p $ROOT
+	cp $CURR_DIR/* $ROOT/ -af
+	cd $ROOT/
+	build_tool
+	mkdir $ROOT/root/usr/lib/lua/ -p
+	cp $ROOT/files/luci $ROOT/root/usr/lib/lua/ -af
+	
+	#Generate Language
+	$PO2LMO $ROOT/files/luci/i18n/smartdns.zh-cn.po $ROOT/root/usr/lib/lua/luci/i18n/smartdns.zh-cn.lmo
+	rm $ROOT/root/usr/lib/lua/luci/i18n/smartdns.zh-cn.po
+
+	cp $ROOT/files/etc $ROOT/root/ -af
+	INST_SIZE="`du -sb $ROOT/root/ | awk '{print $1}'`"
+	
+	sed -i "s/^Architecture.*/Architecture: all/g" $ROOT/control/control
+	sed -i "s/Version:.*/Version: $VER/" $ROOT/control/control
+
+	if [ ! -z "$INST_SIZE" ]; then
+		echo "Installed-Size: $INST_SIZE" >> $ROOT/control/control
+	fi
+
+	cd $ROOT/control
+	chmod +x *
+	tar zcf ../control.tar.gz ./
+	cd $ROOT
+
+	tar zcf $ROOT/data.tar.gz -C root .
+	tar zcf $OUTPUTDIR/luci-app-smartdns.$VER.$FILEARCH.ipk ./control.tar.gz ./data.tar.gz ./debian-binary
+
+	rm -fr $ROOT/
+}
+
+main()
+{
+	OPTS=`getopt -o o:h --long arch:,ver:,filearch: \
+		-n  "" -- "$@"`
+
+	if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
+
+	# Note the quotes around `$TEMP': they are essential!
+	eval set -- "$OPTS"
+
+	while true; do
+		case "$1" in
+		--arch)
+			ARCH="$2"
+			shift 2;;
+		--filearch)
+			FILEARCH="$2"
+			shift 2;;
+		--ver)
+			VER="$2"
+			shift 2;;
+		-o )
+			OUTPUTDIR="$2"
+			shift 2;;
+		-h | --help )
+			showhelp
+			return 0
+			shift ;;
+		-- ) shift; break ;;
+		* ) break ;;
+		esac
+	done
+
+	if [ -z "$ARCH" ]; then
+		echo "please input arch."
+		return 1;
+	fi
+
+	if [ -z "$FILEARCH" ]; then
+		FILEARCH=$ARCH
+	fi
+
+	if [ -z "$OUTPUTDIR" ]; then
+		OUTPUTDIR=$CURR_DIR;
+	fi
+
+	build
+}
+
+main $@
+exit $?
+
+

package/luci-compat/tool/po2lmo/Makefile

@@ -0,0 +1,12 @@
+
+INSTALL = install
+PREFIX  = /usr/bin
+
+po2lmo: src/po2lmo.o src/template_lmo.o
+	$(CC) $(LDFLAGS) -o src/po2lmo src/po2lmo.o src/template_lmo.o
+
+install:
+	$(INSTALL) -m 755 src/po2lmo $(PREFIX)
+
+clean:
+	$(RM) src/po2lmo src/*.o

package/luci-compat/tool/po2lmo/src/po2lmo.c

@@ -0,0 +1,247 @@
+/*
+ * lmo - Lua Machine Objects - PO to LMO conversion tool
+ *
+ *   Copyright (C) 2009-2012 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include "template_lmo.h"
+
+static void die(const char *msg)
+{
+	fprintf(stderr, "Error: %s\n", msg);
+	exit(1);
+}
+
+static void usage(const char *name)
+{
+	fprintf(stderr, "Usage: %s input.po output.lmo\n", name);
+	exit(1);
+}
+
+static void print(const void *ptr, size_t size, size_t nmemb, FILE *stream)
+{
+	if( fwrite(ptr, size, nmemb, stream) == 0 )
+		die("Failed to write stdout");
+}
+
+static int extract_string(const char *src, char *dest, int len)
+{
+	int pos = 0;
+	int esc = 0;
+	int off = -1;
+
+	for( pos = 0; (pos < strlen(src)) && (pos < len); pos++ )
+	{
+		if( (off == -1) && (src[pos] == '"') )
+		{
+			off = pos + 1;
+		}
+		else if( off >= 0 )
+		{
+			if( esc == 1 )
+			{
+				switch (src[pos])
+				{
+				case '"':
+				case '\\':
+					off++;
+					break;
+				}
+				dest[pos-off] = src[pos];
+				esc = 0;
+			}
+			else if( src[pos] == '\\' )
+			{
+				dest[pos-off] = src[pos];
+				esc = 1;
+			}
+			else if( src[pos] != '"' )
+			{
+				dest[pos-off] = src[pos];
+			}
+			else
+			{
+				dest[pos-off] = '\0';
+				break;
+			}
+		}
+	}
+
+	return (off > -1) ? strlen(dest) : -1;
+}
+
+static int cmp_index(const void *a, const void *b)
+{
+	uint32_t x = ((const lmo_entry_t *)a)->key_id;
+	uint32_t y = ((const lmo_entry_t *)b)->key_id;
+
+	if (x < y)
+		return -1;
+	else if (x > y)
+		return 1;
+
+	return 0;
+}
+
+static void print_uint32(uint32_t x, FILE *out)
+{
+	uint32_t y = htonl(x);
+	print(&y, sizeof(uint32_t), 1, out);
+}
+
+static void print_index(void *array, int n, FILE *out)
+{
+	lmo_entry_t *e;
+
+	qsort(array, n, sizeof(*e), cmp_index);
+
+	for (e = array; n > 0; n--, e++)
+	{
+		print_uint32(e->key_id, out);
+		print_uint32(e->val_id, out);
+		print_uint32(e->offset, out);
+		print_uint32(e->length, out);
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	char line[4096];
+	char key[4096];
+	char val[4096];
+	char tmp[4096];
+	int state  = 0;
+	int offset = 0;
+	int length = 0;
+	int n_entries = 0;
+	void *array = NULL;
+	lmo_entry_t *entry = NULL;
+	uint32_t key_id, val_id;
+
+	FILE *in;
+	FILE *out;
+
+	if( (argc != 3) || ((in = fopen(argv[1], "r")) == NULL) || ((out = fopen(argv[2], "w")) == NULL) )
+		usage(argv[0]);
+
+	memset(line, 0, sizeof(key));
+	memset(key, 0, sizeof(val));
+	memset(val, 0, sizeof(val));
+
+	while( (NULL != fgets(line, sizeof(line), in)) || (state >= 2 && feof(in)) )
+	{
+		if( state == 0 && strstr(line, "msgid \"") == line )
+		{
+			switch(extract_string(line, key, sizeof(key)))
+			{
+				case -1:
+					die("Syntax error in msgid");
+				case 0:
+					state = 1;
+					break;
+				default:
+					state = 2;
+			}
+		}
+		else if( state == 1 || state == 2 )
+		{
+			if( strstr(line, "msgstr \"") == line || state == 2 )
+			{
+				switch(extract_string(line, val, sizeof(val)))
+				{
+					case -1:
+						state = 4;
+						break;
+					default:
+						state = 3;
+				}
+			}
+			else
+			{
+				switch(extract_string(line, tmp, sizeof(tmp)))
+				{
+					case -1:
+						state = 2;
+						break;
+					default:
+						strcat(key, tmp);
+				}
+			}
+		}
+		else if( state == 3 )
+		{
+			switch(extract_string(line, tmp, sizeof(tmp)))
+			{
+				case -1:
+					state = 4;
+					break;
+				default:
+					strcat(val, tmp);
+			}
+		}
+
+		if( state == 4 )
+		{
+			if( strlen(key) > 0 && strlen(val) > 0 )
+			{
+				key_id = sfh_hash(key, strlen(key));
+				val_id = sfh_hash(val, strlen(val));
+
+				if( key_id != val_id )
+				{
+					n_entries++;
+					array = realloc(array, n_entries * sizeof(lmo_entry_t));
+					entry = (lmo_entry_t *)array + n_entries - 1;
+
+					if (!array)
+						die("Out of memory");
+
+					entry->key_id = key_id;
+					entry->val_id = val_id;
+					entry->offset = offset;
+					entry->length = strlen(val);
+
+					length = strlen(val) + ((4 - (strlen(val) % 4)) % 4);
+
+					print(val, length, 1, out);
+					offset += length;
+				}
+			}
+
+			state = 0;
+			memset(key, 0, sizeof(key));
+			memset(val, 0, sizeof(val));
+		}
+
+		memset(line, 0, sizeof(line));
+	}
+
+	print_index(array, n_entries, out);
+
+	if( offset > 0 )
+	{
+		print_uint32(offset, out);
+		fsync(fileno(out));
+		fclose(out);
+	}
+	else
+	{
+		fclose(out);
+		unlink(argv[2]);
+	}
+
+	fclose(in);
+	return(0);
+}

package/luci-compat/tool/po2lmo/src/template_lmo.c

@@ -0,0 +1,328 @@
+/*
+ * lmo - Lua Machine Objects - Base functions
+ *
+ *   Copyright (C) 2009-2010 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include "template_lmo.h"
+
+/*
+ * Hash function from http://www.azillionmonkeys.com/qed/hash.html
+ * Copyright (C) 2004-2008 by Paul Hsieh
+ */
+
+uint32_t sfh_hash(const char *data, int len)
+{
+	uint32_t hash = len, tmp;
+	int rem;
+
+	if (len <= 0 || data == NULL) return 0;
+
+	rem = len & 3;
+	len >>= 2;
+
+	/* Main loop */
+	for (;len > 0; len--) {
+		hash  += sfh_get16(data);
+		tmp    = (sfh_get16(data+2) << 11) ^ hash;
+		hash   = (hash << 16) ^ tmp;
+		data  += 2*sizeof(uint16_t);
+		hash  += hash >> 11;
+	}
+
+	/* Handle end cases */
+	switch (rem) {
+		case 3: hash += sfh_get16(data);
+			hash ^= hash << 16;
+			hash ^= data[sizeof(uint16_t)] << 18;
+			hash += hash >> 11;
+			break;
+		case 2: hash += sfh_get16(data);
+			hash ^= hash << 11;
+			hash += hash >> 17;
+			break;
+		case 1: hash += *data;
+			hash ^= hash << 10;
+			hash += hash >> 1;
+	}
+
+	/* Force "avalanching" of final 127 bits */
+	hash ^= hash << 3;
+	hash += hash >> 5;
+	hash ^= hash << 4;
+	hash += hash >> 17;
+	hash ^= hash << 25;
+	hash += hash >> 6;
+
+	return hash;
+}
+
+uint32_t lmo_canon_hash(const char *str, int len)
+{
+	char res[4096];
+	char *ptr, prev;
+	int off;
+
+	if (!str || len >= sizeof(res))
+		return 0;
+
+	for (prev = ' ', ptr = res, off = 0; off < len; prev = *str, off++, str++)
+	{
+		if (isspace(*str))
+		{
+			if (!isspace(prev))
+				*ptr++ = ' ';
+		}
+		else
+		{
+			*ptr++ = *str;
+		}
+	}
+
+	if ((ptr > res) && isspace(*(ptr-1)))
+		ptr--;
+
+	return sfh_hash(res, ptr - res);
+}
+
+lmo_archive_t * lmo_open(const char *file)
+{
+	int in = -1;
+	uint32_t idx_offset = 0;
+	struct stat s;
+
+	lmo_archive_t *ar = NULL;
+
+	if (stat(file, &s) == -1)
+		goto err;
+
+	if ((in = open(file, O_RDONLY)) == -1)
+		goto err;
+
+	if ((ar = (lmo_archive_t *)malloc(sizeof(*ar))) != NULL)
+	{
+		memset(ar, 0, sizeof(*ar));
+
+		ar->fd     = in;
+		ar->size = s.st_size;
+
+		fcntl(ar->fd, F_SETFD, fcntl(ar->fd, F_GETFD) | FD_CLOEXEC);
+
+		if ((ar->mmap = mmap(NULL, ar->size, PROT_READ, MAP_SHARED, ar->fd, 0)) == MAP_FAILED)
+			goto err;
+
+		idx_offset = ntohl(*((const uint32_t *)
+		                     (ar->mmap + ar->size - sizeof(uint32_t))));
+
+		if (idx_offset >= ar->size)
+			goto err;
+
+		ar->index  = (lmo_entry_t *)(ar->mmap + idx_offset);
+		ar->length = (ar->size - idx_offset - sizeof(uint32_t)) / sizeof(lmo_entry_t);
+		ar->end    = ar->mmap + ar->size;
+
+		return ar;
+	}
+
+err:
+	if (in > -1)
+		close(in);
+
+	if (ar != NULL)
+	{
+		if ((ar->mmap != NULL) && (ar->mmap != MAP_FAILED))
+			munmap(ar->mmap, ar->size);
+
+		free(ar);
+	}
+
+	return NULL;
+}
+
+void lmo_close(lmo_archive_t *ar)
+{
+	if (ar != NULL)
+	{
+		if ((ar->mmap != NULL) && (ar->mmap != MAP_FAILED))
+			munmap(ar->mmap, ar->size);
+
+		close(ar->fd);
+		free(ar);
+
+		ar = NULL;
+	}
+}
+
+
+lmo_catalog_t *_lmo_catalogs = NULL;
+lmo_catalog_t *_lmo_active_catalog = NULL;
+
+int lmo_load_catalog(const char *lang, const char *dir)
+{
+	DIR *dh = NULL;
+	char pattern[16];
+	char path[PATH_MAX];
+	struct dirent *de = NULL;
+
+	lmo_archive_t *ar = NULL;
+	lmo_catalog_t *cat = NULL;
+
+	if (!lmo_change_catalog(lang))
+		return 0;
+
+	if (!dir || !(dh = opendir(dir)))
+		goto err;
+
+	if (!(cat = malloc(sizeof(*cat))))
+		goto err;
+
+	memset(cat, 0, sizeof(*cat));
+
+	snprintf(cat->lang, sizeof(cat->lang), "%s", lang);
+	snprintf(pattern, sizeof(pattern), "*.%s.lmo", lang);
+
+	while ((de = readdir(dh)) != NULL)
+	{
+		if (!fnmatch(pattern, de->d_name, 0))
+		{
+			snprintf(path, sizeof(path), "%s/%s", dir, de->d_name);
+			ar = lmo_open(path);
+
+			if (ar)
+			{
+				ar->next = cat->archives;
+				cat->archives = ar;
+			}
+		}
+	}
+
+	closedir(dh);
+
+	cat->next = _lmo_catalogs;
+	_lmo_catalogs = cat;
+
+	if (!_lmo_active_catalog)
+		_lmo_active_catalog = cat;
+
+	return 0;
+
+err:
+	if (dh) closedir(dh);
+	if (cat) free(cat);
+
+	return -1;
+}
+
+int lmo_change_catalog(const char *lang)
+{
+	lmo_catalog_t *cat;
+
+	for (cat = _lmo_catalogs; cat; cat = cat->next)
+	{
+		if (!strncmp(cat->lang, lang, sizeof(cat->lang)))
+		{
+			_lmo_active_catalog = cat;
+			return 0;
+		}
+	}
+
+	return -1;
+}
+
+static lmo_entry_t * lmo_find_entry(lmo_archive_t *ar, uint32_t hash)
+{
+	unsigned int m, l, r;
+	uint32_t k;
+
+	l = 0;
+	r = ar->length - 1;
+
+	while (1)
+	{
+		m = l + ((r - l) / 2);
+
+		if (r < l)
+			break;
+
+		k = ntohl(ar->index[m].key_id);
+
+		if (k == hash)
+			return &ar->index[m];
+
+		if (k > hash)
+		{
+			if (!m)
+				break;
+
+			r = m - 1;
+		}
+		else
+		{
+			l = m + 1;
+		}
+	}
+
+	return NULL;
+}
+
+int lmo_translate(const char *key, int keylen, char **out, int *outlen)
+{
+	uint32_t hash;
+	lmo_entry_t *e;
+	lmo_archive_t *ar;
+
+	if (!key || !_lmo_active_catalog)
+		return -2;
+
+	hash = lmo_canon_hash(key, keylen);
+
+	for (ar = _lmo_active_catalog->archives; ar; ar = ar->next)
+	{
+		if ((e = lmo_find_entry(ar, hash)) != NULL)
+		{
+			*out = ar->mmap + ntohl(e->offset);
+			*outlen = ntohl(e->length);
+			return 0;
+		}
+	}
+
+	return -1;
+}
+
+void lmo_close_catalog(const char *lang)
+{
+	lmo_archive_t *ar, *next;
+	lmo_catalog_t *cat, *prev;
+
+	for (prev = NULL, cat = _lmo_catalogs; cat; prev = cat, cat = cat->next)
+	{
+		if (!strncmp(cat->lang, lang, sizeof(cat->lang)))
+		{
+			if (prev)
+				prev->next = cat->next;
+			else
+				_lmo_catalogs = cat->next;
+
+			for (ar = cat->archives; ar; ar = next)
+			{
+				next = ar->next;
+				lmo_close(ar);
+			}
+
+			free(cat);
+			break;
+		}
+	}
+}

package/luci-compat/tool/po2lmo/src/template_lmo.h

@@ -0,0 +1,92 @@
+/*
+ * lmo - Lua Machine Objects - General header
+ *
+ *   Copyright (C) 2009-2012 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#ifndef _TEMPLATE_LMO_H_
+#define _TEMPLATE_LMO_H_
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fnmatch.h>
+#include <dirent.h>
+#include <ctype.h>
+#include <limits.h>
+
+#if (defined(__GNUC__) && defined(__i386__))
+#define sfh_get16(d) (*((const uint16_t *) (d)))
+#else
+#define sfh_get16(d) ((((uint32_t)(((const uint8_t *)(d))[1])) << 8)\
+					   +(uint32_t)(((const uint8_t *)(d))[0]) )
+#endif
+
+
+struct lmo_entry {
+	uint32_t key_id;
+	uint32_t val_id;
+	uint32_t offset;
+	uint32_t length;
+} __attribute__((packed));
+
+typedef struct lmo_entry lmo_entry_t;
+
+
+struct lmo_archive {
+	int         fd;
+	int	        length;
+	uint32_t    size;
+	lmo_entry_t *index;
+	char        *mmap;
+	char		*end;
+	struct lmo_archive *next;
+};
+
+typedef struct lmo_archive lmo_archive_t;
+
+
+struct lmo_catalog {
+	char lang[6];
+	struct lmo_archive *archives;
+	struct lmo_catalog *next;
+};
+
+typedef struct lmo_catalog lmo_catalog_t;
+
+
+uint32_t sfh_hash(const char *data, int len);
+uint32_t lmo_canon_hash(const char *data, int len);
+
+lmo_archive_t * lmo_open(const char *file);
+void lmo_close(lmo_archive_t *ar);
+
+
+extern lmo_catalog_t *_lmo_catalogs;
+extern lmo_catalog_t *_lmo_active_catalog;
+
+int lmo_load_catalog(const char *lang, const char *dir);
+int lmo_change_catalog(const char *lang);
+int lmo_translate(const char *key, int keylen, char **out, int *outlen);
+void lmo_close_catalog(const char *lang);
+
+#endif

package/luci/control/control

@@ -4,5 +4,4 @@ Depends: libc, smartdns
 Source: feeds/luci/applications/luci-app-smartdns
 Section: luci
 Architecture: all
-Installed-Size: 1040
-Description:  A smartdns server module
+Description:  A smartdns server

package/luci/control/postinst

@@ -1,4 +1,20 @@
 #!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 [ "${IPKG_NO_SCRIPT}" = "1" ] && exit 0
 [ -x ${IPKG_INSTROOT}/lib/functions.sh ] || exit 0
 . ${IPKG_INSTROOT}/lib/functions.sh

package/luci/control/postinst-pkg

@@ -1,4 +0,0 @@
-[ -n "${IPKG_INSTROOT}" ] || {
-	(. /etc/uci-defaults/50_luci-smartdns) && rm -f /etc/uci-defaults/50_luci-smartdns
-	exit 0
-}

package/luci/control/prerm

@@ -1,4 +1,20 @@
 #!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 [ -x ${IPKG_INSTROOT}/lib/functions.sh ] || exit 0
 . ${IPKG_INSTROOT}/lib/functions.sh
 default_prerm $0 $@

package/luci/files/etc/uci-defaults/50_luci-smartdns

@@ -1,11 +0,0 @@
-#!/bin/sh
-
-uci -q batch <<-EOF >/dev/null
-	delete ucitrack.@smartdns[-1]
-	add ucitrack smartdns
-	set ucitrack.@smartdns[-1].init=smartdns
-	commit ucitrack
-EOF
-
-rm -f /tmp/luci-indexcache
-exit 0

package/luci/files/luci/i18n/smartdns.zh-cn.po

@@ -1,192 +1,311 @@
-msgid ""
-msgstr "Content-Type: text/plain; charset=UTF-8\n"
-
-msgid "SmartDNS"
-msgstr "SmartDNS"
-
-msgid "SmartDNS is a local high-performance DNS server"
-msgstr "SmartDNS是一个本地高性能DNS服务器"
-
-msgid "SmartDNS Server"
-msgstr "SmartDNS 服务器"
-
-msgid "SmartDNS is a local high-performance DNS server, supports finding fastest IP, supports ad filtering, and supports avoiding DNS poisoning."
-msgstr "SmartDNS是一个本地高性能DNS服务器，支持避免域名污染，支持返回最快IP，支持广告过滤。"
-
-msgid "Custom Settings"
-msgstr "自定义设置"
-
-msgid "Generate Coredump"
-msgstr "生成coredump"
-
-msgid "Generate Coredump file when smartdns crash, coredump file is located at /tmp/smartdns.xxx.core."
-msgstr "当smartdns异常时生成coredump文件，coredump文件在/tmp/smartdns.xxx.core."
-
-msgid "Server Name"
-msgstr "服务器名称"
-
-msgid "Smartdns server name"
-msgstr "SmartDNS的服务器名称，默认为smartdns，留空为主机名"
-
-msgid "SmartDNS is a local dns server to find fastest ip."
-msgstr "本地高性能服务器，优化网络访问性能。"
-
-msgid "Enable or disable smartdns server"
-msgstr "启用或禁用SmartDNS服务"
-
-msgid "Local Port"
-msgstr "本地端口"
-
-msgid "Smartdns local server port"
-msgstr "SmartDNS本地服务端口"
-
-msgid "IPV4 53 Port Redirect Failure"
-msgstr "IPV4 53端口重定向失败"
-
-msgid "IPV6 53 Port Redirect Failure"
-msgstr "IPV6 53端口重定向失败"
-
-msgid "Dnsmasq Forwared To Smartdns Failure"
-msgstr "重定向dnsmasq到smartdns失败"
-
-msgid "TCP Server"
-msgstr "TCP服务器"
-
-msgid "Enable TCP DNS Server"
-msgstr "启用TCP服务器"
-
-msgid "IPV6 Server"
-msgstr "IPV6服务器"
-
-msgid "Enable IPV6 DNS Server"
-msgstr "启用IPV6服务器"
-
-msgid "Dual-stack IP Selection"
-msgstr "双栈IP优选"
-
-msgid "Enable IP selection between IPV4 and IPV6"
-msgstr "启用或禁用IPV4，IPV6间的IP优选策略。"
-
-msgid "Domain prefetch"
-msgstr "域名预加载"
-
-msgid "Enable domain prefetch, accelerate domain response speed."
-msgstr "启用域名预加载，加速域名响应速度。"
-
-msgid "Redirect"
-msgstr "重定向"
-
-msgid "SmartDNS redirect mode"
-msgstr "SmartDNS 重定向模式"
-
-msgid "Run as dnsmasq upstream server"
-msgstr "作为dnsmasq的上游服务器"
-
-msgid "Redirect 53 port to SmartDNS"
-msgstr "重定向53端口到SmartDNS"
-
-msgid "Cache Size"
-msgstr "缓存大小"
-
-msgid "DNS domain result cache size"
-msgstr "缓存DNS的结果，缓存大小，配置零则不缓存"
-
-msgid "Domain TTL"
-msgstr "域名TTL"
-
-msgid "TTL for all domain result."
-msgstr "设置所有域名的TTL值"
-
-msgid "Domain TTL Min"
-msgstr "域名TTL最小值"
-
-msgid "Minimum TTL for all domain result."
-msgstr "设置所有域名的TTL最小值"
-
-msgid "Domain TTL Max"
-msgstr "域名TTL最大值"
-
-msgid "Maximum TTL for all domain result."
-msgstr "设置所有域名的TTL最大值"
-
-msgid "smartdns custom settings"
-msgstr "smartdns 自定义设置，具体配置参数参考指导"
-
-msgid "Upstream Servers"
-msgstr "上游服务器"
-
-msgid "Upstream Servers, support UDP, TCP protocol. Please configure multiple DNS servers, including multiple foreign DNS servers."
-msgstr "上游DNS服务器列表，支持UDP，TCP协议，请配置多个上游DNS服务器，包括多个国内外服务器"
-
-msgid "DNS Server Name"
-msgstr "DNS服务器名称"
-
-msgid "port"
-msgstr "端口"
-
-msgid "DNS Server port"
-msgstr "DNS服务器端口"
-
-msgid "DNS Server ip"
-msgstr "DNS服务器IP"
-
-msgid "type"
-msgstr "类型"
-
-msgid "DNS Server type"
-msgstr "协议类型"
-
-msgid "Domain Address"
-msgstr "域名地址"
-
-msgid "IP Blacklist Filtering"
-msgstr "IP黑名单过滤"
-
-msgid "Anti Answer Forgery"
-msgstr "反回答伪造"
-
-msgid "anti answer forgery, if DNS does not work properly after enabling, please turn off this feature"
-msgstr "反回答伪造，如果启用后DNS工作不正常，请关闭此功能。"
-
-msgid "Filtering IP with blacklist"
-msgstr "使用IP黑名单过滤"
-
-msgid "Upstream DNS Server Configuration"
-msgstr "上游DNS服务器配置"
-
-msgid "Set Specific domain ip address."
-msgstr "指定特定域名的IP地址"
-
-msgid "Specify an IP address to return for any host in the given domains, Queries in the domains are never forwarded and always replied to with the specified IP address which may be IPv4 or IPv6."
-msgstr "配置特定域名返回特定的IP地址，域名查询将不到上游服务器请求，直接返回配置的IP地址，可用于广告屏蔽。"
-
-msgid "IP Blacklist"
-msgstr "IP黑名单"
-
-msgid "Set Specific ip blacklist."
-msgstr "设置IP黑名单列表"
-
-msgid "Configure IP blacklists that will be filtered from the results of specific DNS server."
-msgstr "配置需要从指定域名服务器结果过滤的IP黑名单。"
-
-msgid "Technical Support"
-msgstr "技术支持"
-
-msgid "If you like this software, please buy me a cup of coffee."
-msgstr "如果本软件对你有帮助，请给作者加个蛋。"
-
-msgid "SmartDNS official website"
-msgstr "SmartDNS官方网站"
-
-msgid "open website"
-msgstr "打开网站"
-
-msgid "Donate to smartdns"
-msgstr "捐助smartdns项目"
-
-msgid "Donate"
-msgstr "捐助"
-
-
-
-
+msgid ""
+msgstr "Content-Type: text/plain; charset=UTF-8\n"
+
+msgid "SmartDNS"
+msgstr "SmartDNS"
+
+msgid "SmartDNS is a local high-performance DNS server"
+msgstr "SmartDNS是一个本地高性能DNS服务器"
+
+msgid "SmartDNS Server"
+msgstr "SmartDNS 服务器"
+
+msgid "SmartDNS is a local high-performance DNS server, supports finding fastest IP, supports ad filtering, and supports avoiding DNS poisoning."
+msgstr "SmartDNS是一个本地高性能DNS服务器，支持返回最快IP，支持广告过滤。"
+
+msgid "Custom Settings"
+msgstr "自定义设置"
+
+msgid "General Settings"
+msgstr "基本设置"
+
+msgid "Settings"
+msgstr "设置"
+
+msgid "Advanced Settings"
+msgstr "高级设置"
+
+msgid "RUNNING"
+msgstr "运行中"
+
+msgid "NOT RUNNING"
+msgstr "未运行"
+
+msgid "Generate Coredump"
+msgstr "生成coredump"
+
+msgid "Generate Coredump file when smartdns crash, coredump file is located at /tmp/smartdns.xxx.core."
+msgstr "当smartdns异常时生成coredump文件，coredump文件在/tmp/smartdns.xxx.core."
+
+msgid "Server Name"
+msgstr "服务器名称"
+
+msgid "Smartdns server name"
+msgstr "SmartDNS的服务器名称，默认为smartdns，留空为主机名"
+
+msgid "SmartDNS is a local dns server to find fastest ip."
+msgstr "本地高性能服务器，优化网络访问性能。"
+
+msgid "Enable or disable smartdns server"
+msgstr "启用或禁用SmartDNS服务"
+
+msgid "Local Port"
+msgstr "本地端口"
+
+msgid "Smartdns local server port"
+msgstr "SmartDNS本地服务端口"
+
+msgid "IPV4 53 Port Redirect Failure"
+msgstr "IPV4 53端口重定向失败"
+
+msgid "IPV6 53 Port Redirect Failure"
+msgstr "IPV6 53端口重定向失败"
+
+msgid "Dnsmasq Forwared To Smartdns Failure"
+msgstr "重定向dnsmasq到smartdns失败"
+
+msgid "TCP Server"
+msgstr "TCP服务器"
+
+msgid "Enable TCP DNS Server"
+msgstr "启用TCP服务器"
+
+msgid "IPV6 Server"
+msgstr "IPV6服务器"
+
+msgid "Enable IPV6 DNS Server"
+msgstr "启用IPV6服务器"
+
+msgid "Dual-stack IP Selection"
+msgstr "双栈IP优选"
+
+msgid "Enable IP selection between IPV4 and IPV6"
+msgstr "启用或禁用IPV4，IPV6间的IP优选策略。"
+
+msgid "Domain prefetch"
+msgstr "域名预加载"
+
+msgid "Enable domain prefetch, accelerate domain response speed."
+msgstr "启用域名预加载，加速域名响应速度。"
+
+msgid "Serve expired"
+msgstr "缓存过期服务"
+
+msgid "Attempts to serve old responses from cache with a TTL of 0 in the response without waiting for the actual resolution to finish."
+msgstr "查询性能优化，有请求时尝试回应TTL为0的过期记录，以避免查询等待。"
+
+msgid "Redirect"
+msgstr "重定向"
+
+msgid "SmartDNS redirect mode"
+msgstr "SmartDNS 重定向模式"
+
+msgid "Run as dnsmasq upstream server"
+msgstr "作为dnsmasq的上游服务器"
+
+msgid "Redirect 53 port to SmartDNS"
+msgstr "重定向53端口到SmartDNS"
+
+msgid "Cache Size"
+msgstr "缓存大小"
+
+msgid "DNS domain result cache size"
+msgstr "缓存DNS的结果，缓存大小，配置零则不缓存"
+
+msgid "Domain TTL"
+msgstr "域名TTL"
+
+msgid "TTL for all domain result."
+msgstr "设置所有域名的TTL值"
+
+msgid "Domain TTL Min"
+msgstr "域名TTL最小值"
+
+msgid "Minimum TTL for all domain result."
+msgstr "设置所有域名的TTL最小值"
+
+msgid "Domain TTL Max"
+msgstr "域名TTL最大值"
+
+msgid "Maximum TTL for all domain result."
+msgstr "设置所有域名的TTL最大值"
+
+msgid "smartdns custom settings"
+msgstr "smartdns 自定义设置，具体配置参数参考指导"
+
+msgid "Second Server Settings"
+msgstr "第二DNS服务器"
+
+msgid "Enable or disable second DNS server."
+msgstr "是否启用第二DNS服务器。"
+
+msgid "Skip Speed Check"
+msgstr "跳过测速"
+
+msgid "Do not check speed."
+msgstr "禁用测速。"
+
+msgid "Server Group"
+msgstr "服务器组"
+
+msgid "Query DNS through specific dns server group, such as office, home."
+msgstr "使用指定服务器组查询，比如office, home。"
+
+msgid "Skip Address Rules"
+msgstr "跳过address规则"
+
+msgid "Skip address rules."
+msgstr "跳过address规则。"
+
+msgid "Skip Nameserver Rule"
+msgstr "跳过Nameserver规则"
+
+msgid "Skip nameserver rules."
+msgstr "跳过Nameserver规则。"
+
+msgid "Skip Ipset Rule"
+msgstr "跳过ipset规则"
+
+msgid "Skip ipset rules."
+msgstr "跳过ipset规则。"
+
+msgid "Skip SOA Address Rule"
+msgstr "跳过address SOA(#)规则"
+
+msgid "Skip SOA address rules."
+msgstr "跳过address SOA(#)规则。"
+
+msgid "Skip Dualstack Selection"
+msgstr "跳过双栈优选"
+
+msgid "Skip Dualstack Selection."
+msgstr "跳过双栈优选。"
+
+msgid "Skip Cache"
+msgstr "跳过cache"
+
+msgid "Skip Cache."
+msgstr "跳过cache。"
+
+msgid "Force AAAA SOA"
+msgstr "停用IPV6地址解析"
+
+msgid "Force AAAA SOA."
+msgstr "停用IPV6地址解析。"
+
+msgid "Upstream Servers"
+msgstr "上游服务器"
+
+msgid "Upstream Servers, support UDP, TCP protocol. Please configure multiple DNS servers, including multiple foreign DNS servers."
+msgstr "上游DNS服务器列表，支持UDP，TCP协议，请配置多个上游DNS服务器，包括多个国内外服务器"
+
+msgid "DNS Server Name"
+msgstr "DNS服务器名称"
+
+msgid "port"
+msgstr "端口"
+
+msgid "DNS Server port"
+msgstr "DNS服务器端口"
+
+msgid "DNS Server ip"
+msgstr "DNS服务器IP"
+
+msgid "type"
+msgstr "类型"
+
+msgid "DNS Server type"
+msgstr "协议类型"
+
+msgid "Domain Address"
+msgstr "域名地址"
+
+msgid "TLS Hostname Verify"
+msgstr "校验TLS主机名"
+
+msgid "Set TLS hostname to verify."
+msgstr "设置校验TLS主机名。"
+
+msgid "No check certificate"
+msgstr "停用证书校验"
+
+msgid "Do not check certificate."
+msgstr "不校验证书的合法性。"
+
+msgid "TLS SNI name"
+msgstr "TLS SNI名称"
+
+msgid "HTTP Host"
+msgstr "HTTP主机"
+
+msgid "Sets the server name indication for query."
+msgstr "设置查询时使用的服务器SNI名称。"
+
+msgid "Set the HTTP host used for the query. Use this parameter when the host of the URL address is an IP address."
+msgstr "设置查询时使用的HTTP主机，当URL地址的host是IP地址时，使用此参数。"
+
+msgid "Server Group"
+msgstr "服务器组"
+
+msgid "DNS Server group belongs to, used with nameserver, such as office, home."
+msgstr "DNS服务器所属组， 配合nameserver使用，例如：office，home。"
+
+msgid "IP Blacklist Filtering"
+msgstr "IP黑名单过滤"
+
+msgid "Anti Answer Forgery"
+msgstr "反回答伪造"
+
+msgid "Anti answer forgery, if DNS does not work properly after enabling, please turn off this feature"
+msgstr "反回答伪造，如果启用后DNS工作不正常，请关闭此功能。"
+
+msgid "Filtering IP with blacklist"
+msgstr "使用IP黑名单过滤"
+
+msgid "TLS SPKI Pinning"
+msgstr "TLS SPKI 指纹"
+
+msgid "Used to verify the validity of the TLS server, The value is Base64 encoded SPKI fingerprint, leaving blank to indicate that the validity of TLS is not verified."
+msgstr "用于校验TLS服务器的有效性，数值为Base64编码的SPKI指纹, 留空表示不验证TLS的合法性"
+
+msgid "Additional Server Args"
+msgstr "额外的服务器参数"
+
+msgid "Additional Args for upstream dns servers"
+msgstr "额外的上游DNS服务器参数"
+
+msgid "Upstream DNS Server Configuration"
+msgstr "上游DNS服务器配置"
+
+msgid "Set Specific domain ip address."
+msgstr "指定特定域名的IP地址"
+
+msgid "Specify an IP address to return for any host in the given domains, Queries in the domains are never forwarded and always replied to with the specified IP address which may be IPv4 or IPv6."
+msgstr "配置特定域名返回特定的IP地址，域名查询将不到上游服务器请求，直接返回配置的IP地址，可用于广告屏蔽。"
+
+msgid "IP Blacklist"
+msgstr "IP黑名单"
+
+msgid "Set Specific ip blacklist."
+msgstr "设置IP黑名单列表"
+
+msgid "Configure IP blacklists that will be filtered from the results of specific DNS server."
+msgstr "配置需要从指定域名服务器结果过滤的IP黑名单。"
+
+msgid "Technical Support"
+msgstr "技术支持"
+
+msgid "If you like this software, please buy me a cup of coffee."
+msgstr "如果本软件对你有帮助，请给作者加个蛋。"
+
+msgid "SmartDNS official website"
+msgstr "SmartDNS官方网站"
+
+msgid "open website"
+msgstr "打开网站"
+
+msgid "Donate to smartdns"
+msgstr "捐助smartdns项目"
+
+msgid "Donate"
+msgstr "捐助"

package/luci/files/luci/model/cbi/smartdns/upstream.lua

@@ -1,32 +0,0 @@
-local sid = arg[1]
-
-m = Map("smartdns", "%s - %s" %{translate("SmartDNS Server"), translate("Upstream DNS Server Configuration")})
-m.redirect = luci.dispatcher.build_url("admin/services/smartdns")
-
-if m.uci:get("smartdns", sid) ~= "server" then
-	luci.http.redirect(m.redirect)
-	return
-end
-
--- [[ Edit Server ]]--
-s = m:section(NamedSection, sid, "server")
-s.anonymous = true
-s.addremove   = false
-
----- blacklist_ip
-o = s:option(Flag, "blacklist_ip", translate("IP Blacklist Filtering"), translate("Filtering IP with blacklist"))
-o.rmempty     = false
-o.default     = o.disabled
-o.cfgvalue    = function(...)
-    return Flag.cfgvalue(...) or "0"
-end
-
----- anti-Answer-Forgery
-o = s:option(Flag, "check_edns", translate("Anti Answer Forgery"), translate("anti answer forgery, if DNS does not work properly after enabling, please turn off this feature"))
-o.rmempty     = false
-o.default     = o.disabled
-o.cfgvalue    = function(...)
-    return Flag.cfgvalue(...) or "0"
-end
-
-return m

package/luci/files/luci/model/smartdns.lua

@@ -1,17 +0,0 @@
--- Copyright 2018 Nick Peng (pymumu@gmail.com)
-
-require ("nixio.fs")
-require ("luci.http")
-require ("luci.dispatcher")
-require ("nixio.fs")
-
-local uci = require "luci.model.uci".cursor()
-
-module("luci.model.smartdns", package.seeall)
-
-function get_config_option(module, section, option, default)
-	return uci:get_first(module, section, option) or default
-end
-
-return m
-

package/luci/files/root/usr/share/luci/menu.d/luci-app-smartdns.json

@@ -0,0 +1,12 @@
+{
+	"admin/services/smartdns": {
+		"title": "SmartDNS",
+		"action": {
+			"type": "view",
+			"path": "smartdns/smartdns"
+		},
+		"depends": {
+			"uci": { "smartdns": true }
+		}
+	}
+}

package/luci/files/root/usr/share/rpcd/acl.d/luci-app-smartdns.json

@@ -0,0 +1,23 @@
+{
+	"luci-app-smartdns": {
+		"description": "Grant access to LuCI app smartdns",
+		"read": {
+			"file": {
+				"/etc/smartdns/*": [ "read" ],
+				"/usr/sbin/iptables -t nat -nL PREROUTING": [ "exec" ],
+				"/usr/sbin/ip6tables -t nat -nL PREROUTING": [ "exec" ],
+				"/usr/sbin/smartdns": [ "exec" ]
+			},
+			"ubus": {
+				"service": [ "list" ]
+			},
+			"uci": [ "smartdns" ]
+		},
+		"write": {
+			"file": {
+				"/etc/smartdns/*": [ "write" ]
+			},
+			"uci": [ "smartdns" ]
+		}
+	}
+}

package/luci/files/root/www/luci-static/resources/view/smartdns/smartdns.js

@@ -0,0 +1,492 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+'use strict';
+'require fs';
+'require uci';
+'require form';
+'require rpc';
+
+var conf = 'smartdns';
+var callServiceList = rpc.declare({
+	object: 'service',
+	method: 'list',
+	params: ['name'],
+	expect: { '': {} }
+});
+
+function getPidOfSmartdns() {
+	return L.resolveDefault(callServiceList(conf), {})
+		.then(function (res) {
+			var isrunning = false;
+			try {
+				isrunning = res[conf]['instances']['smartdns']['running'];
+			} catch (e) { }
+			return isrunning;
+		});
+}
+
+function getIPTablesRedirect() {
+	return fs.exec('/usr/sbin/iptables', ['-t', 'nat', '-nL', 'PREROUTING']).then(function (res) {
+		if (res.code === 0) {
+			return res.stdout.trim();
+		} else {
+			return "";
+		}
+	});
+}
+
+function getIP6TablesRedirect() {
+	return fs.exec('/usr/sbin/ip6tables', ['-t', 'nat', '-nL', 'PREROUTING']).then(function (res) {
+		if (res.code === 0) {
+			return res.stdout.trim();
+		} else {
+			return "";
+		}
+	});
+}
+
+function smartdnsServiceStatus() {
+	return Promise.all([
+		getPidOfSmartdns(),
+		getIPTablesRedirect(),
+		getIP6TablesRedirect()
+	]);
+}
+
+function smartdnsRenderStatus(res) {
+	var renderHTML = "";
+	var isRunning = res[0];
+	var ipt = res[1];
+	var ip6t = res[2];
+
+	var serverPort = uci.get_first('smartdns', 'smartdns', 'port');
+	var redirectMode = uci.get_first('smartdns', 'smartdns', 'redirect');
+	var ipv6Enabled = uci.get_first('smartdns', 'smartdns', 'ipv6_server');
+
+	if (isRunning) {
+		renderHTML += "<span style=\"color:green;font-weight:bold\">SmartDNS - " + _("RUNNING") + "</span>";
+	} else {
+		renderHTML += "<span style=\"color:red;font-weight:bold\">SmartDNS - " + _("NOT RUNNING") + "</span>";
+		return renderHTML;
+	}
+
+	if (redirectMode === "dnsmasq-upstream") {
+		var matchLine = "127.0.0.1#" + serverPort;
+		var dnsmasqServer = uci.get_first('dhcp', 'dnsmasq', 'server') || "";
+
+		if (dnsmasqServer.indexOf(matchLine) < 0) {
+			renderHTML += "<br /><span style=\"color:red;font-weight:bold\">" + _("Dnsmasq Forwared To Smartdns Failure") + "</span>";
+		}
+	} else if (redirectMode === "redirect") {
+		var redirectRules = (ipt || '').split(/\n/).filter(function (rule) {
+			return rule.match(/REDIRECT/) && rule.match(/dpt:53/) && rule.match("ports " + serverPort);
+		});
+
+		if (redirectRules.length <= 0) {
+			renderHTML += "<br /><span style=\"color:red;font-weight:bold\">" + _("IPV4 53 Port Redirect Failure") + "</span>";
+			if (ipv6Enabled) {
+				var redirectRules = (ip6t || '').split(/\n/).filter(function (rule) {
+					return rule.match(/REDIRECT/) && rule.match(/dpt:53/) && rule.match("ports " + serverPort);
+				});
+				if (redirectRules.length <= 0) {
+					renderHTML += "<br /><span style=\"color:red;font-weight:bold\">" + _("IPV6 53 Port Redirect Failure") + "</span>";
+				}
+			}
+		}
+	}
+
+	return renderHTML;
+}
+
+return L.view.extend({
+	load: function () {
+		return Promise.all([
+			uci.load('smartdns'),
+			uci.load('dhcp')
+		]);
+	},
+	render: function (stats) {
+		var m, s, o;
+
+		m = new form.Map('smartdns', _('SmartDNS'));
+		m.title = _("SmartDNS Server");
+		m.description = _("SmartDNS is a local high-performance DNS server, supports finding fastest IP, "
+			+ "supports ad filtering, and supports avoiding DNS poisoning.");
+
+		s = m.section(form.NamedSection, '_status');
+		s.anonymous = true;
+		s.render = function (section_id) {
+			L.Poll.add(function () {
+				return L.resolveDefault(smartdnsServiceStatus()).then(function (res) {
+					var view = document.getElementById("service_status");
+					view.innerHTML = smartdnsRenderStatus(res);
+				});
+			});
+
+			return E('div', { class: 'cbi-map' },
+				E('div', { class: 'cbi-section' }, [
+					E('div', { id: 'service_status' },
+						_('Collecting data ...'))
+				])
+			);
+		}
+
+		// Basic;
+		s = m.section(form.TypedSection, "smartdns", _("Settings"), _("General Settings"));
+		s.anonymous = true;
+
+		s.tab("settings", _("General Settings"));
+		s.tab("seconddns", _("Second Server Settings"));
+		s.tab("custom", _("Custom Settings"));
+
+		// Eanble;
+		o = s.taboption("settings", form.Flag, "enabled", _("Enable"), _("Enable or disable smartdns server"));
+		o.default = o.disabled;
+		o.rempty = false;
+
+		// server name;
+		o = s.taboption("settings", form.Value, "server_name", _("Server Name"), _("Smartdns server name"));
+		o.default = "smartdns";
+		o.datatype = "hostname";
+		o.rempty = false;
+
+		// Port;
+		o = s.taboption("settings", form.Value, "port", _("Local Port"), _("Smartdns local server port"));
+		o.placeholder = 6053;
+		o.default = 6053;
+		o.datatype = "port";
+		o.rempty = false;
+
+		// Enable TCP server;
+		o = s.taboption("settings", form.Flag, "tcp_server", _("TCP Server"), _("Enable TCP DNS Server"));
+		o.rmempty = false;
+		o.default = o.enabled;
+
+		// Support IPV6;
+		o = s.taboption("settings", form.Flag, "ipv6_server", _("IPV6 Server"), _("Enable IPV6 DNS Server"));
+		o.rmempty = false;
+		o.default = o.enabled;
+
+		// Support DualStack ip selection;
+		o = s.taboption("settings", form.Flag, "dualstack_ip_selection", _("Dual-stack IP Selection"),
+			_("Enable IP selection between IPV4 and IPV6"));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// Domain prefetch load ;
+		o = s.taboption("settings", form.Flag, "prefetch_domain", _("Domain prefetch"),
+			_("Enable domain prefetch, accelerate domain response speed."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// Domain Serve expired
+		o = s.taboption("settings", form.Flag, "serve_expired", _("Serve expired"),
+			_("Attempts to serve old responses from cache with a TTL of 0 in the response without waiting for the actual resolution to finish."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// Redirect;
+		o = s.taboption("settings", form.ListValue, "redirect", _("Redirect"), _("SmartDNS redirect mode"));
+		o.placeholder = "none";
+		o.value("none", _("none"));
+		o.value("dnsmasq-upstream", _("Run as dnsmasq upstream server"));
+		o.value("redirect", _("Redirect 53 port to SmartDNS"));
+		o.default = "none";
+		o.rempty = false;
+
+		// cache-size;
+		o = s.taboption("settings", form.Value, "cache_size", _("Cache Size"), _("DNS domain result cache size"));
+		o.rempty = true;
+
+		// rr-ttl;
+		o = s.taboption("settings", form.Value, "rr_ttl", _("Domain TTL"), _("TTL for all domain result."));
+		o.rempty = true;
+
+		// rr-ttl-min;
+		o = s.taboption("settings", form.Value, "rr_ttl_min", _("Domain TTL Min"),
+			_("Minimum TTL for all domain result."));
+		o.rempty = true;
+		o.placeholder = "300";
+		o.default = 300;
+		o.optional = true;
+
+		// second dns server;
+		// rr-ttl-max;
+		o = s.taboption("settings", form.Value, "rr_ttl_max", _("Domain TTL Max"),
+			_("Maximum TTL for all domain result."));
+		o.rempty = true;
+
+		// Eanble;
+		o = s.taboption("seconddns", form.Flag, "seconddns_enabled", _("Enable"),
+			_("Enable or disable second DNS server."));
+		o.default = o.disabled;
+		o.rempty = false;
+
+		// Port;
+		o = s.taboption("seconddns", form.Value, "seconddns_port", _("Local Port"), _("Smartdns local server port"));
+		o.placeholder = 6553;
+		o.default = 6553;
+		o.datatype = "port";
+		o.rempty = false;
+
+		// Enable TCP server;
+		o = s.taboption("seconddns", form.Flag, "seconddns_tcp_server", _("TCP Server"), _("Enable TCP DNS Server"));
+		o.rmempty = false;
+		o.default = o.enabled;
+
+		// dns server group;
+		o = s.taboption("seconddns", form.Value, "seconddns_server_group", _("Server Group"),
+			_("Query DNS through specific dns server group, such as office, home."));
+		o.rmempty = true;
+		o.placeholder = "default";
+		o.datatype = "hostname";
+		o.rempty = true;
+
+		o = s.taboption("seconddns", form.Flag, "seconddns_no_speed_check", _("Skip Speed Check"),
+			_("Do not check speed."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// skip address rules;
+		o = s.taboption("seconddns", form.Flag, "seconddns_no_rule_addr", _("Skip Address Rules"),
+			_("Skip address rules."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// skip name server rules;
+		o = s.taboption("seconddns", form.Flag, "seconddns_no_rule_nameserver", _("Skip Nameserver Rule"),
+			_("Skip nameserver rules."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// skip ipset rules;
+		o = s.taboption("seconddns", form.Flag, "seconddns_no_rule_ipset", _("Skip Ipset Rule"),
+			_("Skip ipset rules."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// skip soa address rule;
+		o = s.taboption("seconddns", form.Flag, "seconddns_no_rule_soa", _("Skip SOA Address Rule"),
+			_("Skip SOA address rules."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		o = s.taboption("seconddns", form.Flag, "seconddns_no_dualstack_selection", _("Skip Dualstack Selection"),
+			_("Skip Dualstack Selection."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// skip cache;
+		o = s.taboption("seconddns", form.Flag, "seconddns_no_cache", _("Skip Cache"), _("Skip Cache."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// Force AAAA SOA
+		o = s.taboption("seconddns", form.Flag, "force_aaaa_soa", _("Force AAAA SOA"), _("Force AAAA SOA."));
+		o.rmempty = false;
+		o.default = o.disabled;
+
+		// custom settings;
+		o = s.taboption("custom", form.TextValue, "custom_conf",
+			"", _("smartdns custom settings"));
+
+		o.rows = 20;
+		o.cfgvalue = function (section_id) {
+			return fs.trimmed('/etc/smartdns/custom.conf');
+		};
+		o.write = function (section_id, formvalue) {
+			return fs.write('/etc/smartdns/custom.conf', formvalue.trim().replace(/\r\n/g, '\n') + '\n');
+		};
+
+		o = s.taboption("custom", form.Flag, "coredump", _("Generate Coredump"),
+			_("Generate Coredump file when smartdns crash, coredump file is located at /tmp/smartdns.xxx.core."));
+		o.rmempty = false;
+		o.default = o.disabled;
+		// Upstream servers;
+		s = m.section(form.GridSection, "server", _("Upstream Servers"),
+			_("Upstream Servers, support UDP, TCP protocol. Please configure multiple DNS servers, "
+				+ "including multiple foreign DNS servers."));
+		s.anonymous = true;
+		s.addremove = true;
+
+		s.tab('general', _('General Settings'));
+		s.tab('advanced', _('Advanced Settings'));
+
+		// enable flag;
+		o = s.taboption("general", form.Flag, "enabled", _("Enable"), _("Enable"));
+		o.rmempty = false;
+		o.default = o.enabled;
+		o.editable = true;
+
+		// name;
+		o = s.taboption("general", form.Value, "name", _("DNS Server Name"), _("DNS Server Name"));
+
+		// IP address;
+		o = s.taboption("general", form.Value, "ip", _("ip"), _("DNS Server ip"));
+		o.datatype = "or(ipaddr, string)";
+		o.rmempty = false;
+
+		// port;
+		o = s.taboption("general", form.Value, "port", _("port"), _("DNS Server port"));
+		o.placeholder = "default";
+		o.datatype = "port";
+		o.rempty = true;
+		o.depends("type", "udp");
+		o.depends("type", "tcp");
+		o.depends("type", "tls");
+
+		// type;
+		o = s.taboption("general", form.ListValue, "type", _("type"), _("DNS Server type"));
+		o.placeholder = "udp";
+		o.value("udp", _("udp"));
+		o.value("tcp", _("tcp"));
+		o.value("tls", _("tls"));
+		o.value("https", _("https"));
+		o.default = "udp";
+		o.rempty = false;
+
+		// Advanced Options
+		// server group
+		o = s.taboption("advanced", form.Value, "server_group", _("Server Group"), _("DNS Server group belongs to, "
+			+ "used with nameserver, such as office, home."))
+		o.rmempty = true
+		o.placeholder = "default"
+		o.datatype = "hostname"
+		o.rempty = true
+		o.modalonly = true;
+
+		// blacklist_ip
+		o = s.taboption("advanced", form.Flag, "blacklist_ip", _("IP Blacklist Filtering"),
+			_("Filtering IP with blacklist"))
+		o.rmempty = false
+		o.default = o.disabled
+		o.modalonly = true;
+
+		// TLS host verify
+		o = s.taboption("advanced", form.Value, "tls_host_verify", _("TLS Hostname Verify"),
+			_("Set TLS hostname to verify."))
+		o.default = ""
+		o.datatype = "string"
+		o.rempty = true
+		o.modalonly = true;
+		o.depends("type", "tls")
+		o.depends("type", "https")
+
+		// certificate verify
+		o = s.taboption("advanced", form.Flag, "no_check_certificate", _("No check certificate"),
+			_("Do not check certificate."))
+		o.rmempty = false
+		o.default = o.disabled
+		o.modalonly = true;
+		o.depends("type", "tls")
+		o.depends("type", "https")
+
+		// SNI host name
+		o = s.taboption("advanced", form.Value, "host_name", _("TLS SNI name"),
+			_("Sets the server name indication for query."))
+		o.default = ""
+		o.datatype = "hostname"
+		o.rempty = true
+		o.modalonly = true;
+		o.depends("type", "tls")
+		o.depends("type", "https")
+
+		// http host
+		o = s.taboption("advanced", form.Value, "http_host", _("HTTP Host"),
+			_("Set the HTTP host used for the query. Use this parameter when the host of the URL address is an IP address."))
+		o.default = ""
+		o.datatype = "hostname"
+		o.rempty = true
+		o.modalonly = true;
+		o.depends("type", "https")
+
+		// SPKI pin
+		o = s.taboption("advanced", form.Value, "spki_pin", _("TLS SPKI Pinning"),
+			_("Used to verify the validity of the TLS server, The value is Base64 encoded SPKI fingerprint, "
+				+ "leaving blank to indicate that the validity of TLS is not verified."))
+		o.default = ""
+		o.datatype = "string"
+		o.rempty = true
+		o.modalonly = true;
+		o.depends("type", "tls")
+		o.depends("type", "https")
+
+		// other args
+		o = s.taboption("advanced", form.Value, "addition_arg", _("Additional Server Args"),
+			_("Additional Args for upstream dns servers"))
+		o.default = ""
+		o.rempty = true
+		o.modalonly = true;
+
+		// Doman addresss;
+		s = m.section(form.TypedSection, "smartdns", _("Advanced Settings"), _("Advanced Settings"));
+		s.anonymous = true;
+
+		s.tab("domain-address", _("Domain Address"), _("Set Specific domain ip address."));
+		s.tab("blackip-list", _("IP Blacklist"), _("Set Specific ip blacklist."));
+
+		o = s.taboption("domain-address", form.TextValue, "address_conf",
+			"",
+			_("Specify an IP address to return for any host in the given domains, Queries in the domains are never "
+				+ "forwarded and always replied to with the specified IP address which may be IPv4 or IPv6."));
+		o.rows = 20;
+		o.cfgvalue = function (section_id) {
+			return fs.trimmed('/etc/smartdns/address.conf');
+		};
+		o.write = function (section_id, formvalue) {
+			return fs.write('/etc/smartdns/address.conf', formvalue.trim().replace(/\r\n/g, '\n') + '\n');
+		};
+
+		// IP Blacklist;
+		// blacklist;
+		o = s.taboption("blackip-list", form.TextValue, "blackip_ip_conf",
+			"", _("Configure IP blacklists that will be filtered from the results of specific DNS server."));
+		o.rows = 20;
+		o.cfgvalue = function (section_id) {
+			return fs.trimmed('/etc/smartdns/blacklist-ip.conf');
+		};
+		o.write = function (section_id, formvalue) {
+			return fs.write('/etc/smartdns/blacklist-ip.conf', formvalue.trim().replace(/\r\n/g, '\n') + '\n');
+		};
+
+		// Doman addresss;
+		s = m.section(form.TypedSection, "smartdns", _("Technical Support"),
+			_("If you like this software, please buy me a cup of coffee."));
+		s.anonymous = true;
+
+		o = s.option(form.Button, "web");
+		o.title = _("SmartDNS official website");
+		o.inputtitle = _("open website");
+		o.inputstyle = "apply";
+		o.onclick = function () {
+			window.open("https://pymumu.github.io/smartdns", '_blank');
+		};
+
+		o = s.option(form.Button, "Donate");
+		o.title = _("Donate to smartdns");
+		o.inputtitle = _("Donate");
+		o.inputstyle = "apply";
+		o.onclick = function () {
+			window.open("https://pymumu.github.io/smartdns/#donate", '_blank');
+		};
+
+		return m.render();
+	}
+});

package/luci/make.sh

@@ -1,5 +1,19 @@
-#/bin/sh
-
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 CURR_DIR=$(cd $(dirname $0);pwd)
 
 VER="`date +"1.%Y.%m.%d-%H%M"`"
@@ -12,63 +26,65 @@ showhelp()
 	echo "Options:"
 	echo " -o               output directory."
 	echo " --arch           archtecture."
-    echo " --ver            version."
+	echo " --ver            version."
 	echo " -h               show this message."
 }
 
 build_tool()
 {
-    make -C $ROOT/tool/po2lmo -j 
-    PO2LMO="$ROOT/tool/po2lmo/src/po2lmo"
+	make -C $ROOT/tool/po2lmo -j 
+	PO2LMO="$ROOT/tool/po2lmo/src/po2lmo"
 
 }
 
 clean_tool()
 {
-    make -C $ROOT/tool/po2lmo clean
+	make -C $ROOT/tool/po2lmo clean
 }
 
 build()
 {
 
-    ROOT=/tmp/luci-app-smartdns
-    rm -fr $ROOT
+	ROOT=/tmp/luci-app-smartdns
+	rm -fr $ROOT
 
-    mkdir -p $ROOT
-    cp $CURR_DIR/* $ROOT/ -af
-    cd $ROOT/
-    build_tool
-    mkdir $ROOT/root/usr/lib/lua/ -p
-    cp $ROOT/files/luci $ROOT/root/usr/lib/lua/ -af
-    
-    #Generate Language
-    $PO2LMO $ROOT/files/luci/i18n/smartdns.zh-cn.po $ROOT/root/usr/lib/lua/luci/i18n/smartdns.zh-cn.lmo
-    rm $ROOT/root/usr/lib/lua/luci/i18n/smartdns.zh-cn.po
+	mkdir -p $ROOT
+	cp $CURR_DIR/* $ROOT/ -af
+	cd $ROOT/
+	build_tool
+	
+	mkdir $ROOT/root/usr/lib/lua/luci -p
+	mkdir $ROOT/root/usr/share/rpcd/acl.d/ -p
+	cp $ROOT/files/luci/i18n $ROOT/root/usr/lib/lua/luci/ -avf
 
-    cp $ROOT/files/etc $ROOT/root/ -af
-    INST_SIZE="`du -sb $ROOT/root/ | awk '{print $1}'`"
-    
-    sed -i "s/^Architecture.*/Architecture: $ARCH/g" $ROOT/control/control
-    sed -i "s/Version:.*/Version: $VER/" $ROOT/control/control
+	#Generate Language
+	$PO2LMO $ROOT/files/luci/i18n/smartdns.zh-cn.po $ROOT/root/usr/lib/lua/luci/i18n/smartdns.zh-cn.lmo
+	rm $ROOT/root/usr/lib/lua/luci/i18n/smartdns.zh-cn.po
 
-    if [ ! -z "$INST_SIZE" ]; then
-        echo "Installed-Size: $INST_SIZE" >> $ROOT/control/control
-    fi
+	cp $ROOT/files/root/* $ROOT/root/ -avf
+	INST_SIZE="`du -sb $ROOT/root/ | awk '{print $1}'`"
+	
+	sed -i "s/^Architecture.*/Architecture: all/g" $ROOT/control/control
+	sed -i "s/Version:.*/Version: $VER/" $ROOT/control/control
 
-    cd $ROOT/control
-    chmod +x *
-    tar zcf ../control.tar.gz ./
-    cd $ROOT
+	if [ ! -z "$INST_SIZE" ]; then
+		echo "Installed-Size: $INST_SIZE" >> $ROOT/control/control
+	fi
 
-    tar zcf $ROOT/data.tar.gz -C root .
-    tar zcf $OUTPUTDIR/luci-app-smartdns.$VER.$ARCH.ipk control.tar.gz data.tar.gz debian-binary
+	cd $ROOT/control
+	chmod +x *
+	tar zcf ../control.tar.gz ./
+	cd $ROOT
 
-    rm -fr $ROOT/
+	tar zcf $ROOT/data.tar.gz -C root .
+	tar zcf $OUTPUTDIR/luci-app-smartdns.$VER.$FILEARCH.ipk ./control.tar.gz ./data.tar.gz ./debian-binary
+
+	rm -fr $ROOT/
 }
 
 main()
 {
-	OPTS=`getopt -o o:h --long arch:,ver: \
+	OPTS=`getopt -o o:h --long arch:,ver:,filearch: \
 		-n  "" -- "$@"`
 
 	if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
@@ -81,31 +97,38 @@ main()
 		--arch)
 			ARCH="$2"
 			shift 2;;
-        --ver)
-            VER="$2"
-            shift 2;;
+		--filearch)
+			FILEARCH="$2"
+			shift 2;;
+		--ver)
+			VER="$2"
+			shift 2;;
 		-o )
 			OUTPUTDIR="$2"
 			shift 2;;
-        -h | --help )
+		-h | --help )
 			showhelp
 			return 0
 			shift ;;
 		-- ) shift; break ;;
 		* ) break ;;
-  		esac
+		esac
 	done
 
-    if [ -z "$ARCH" ]; then
-        echo "please input arch."
-        return 1;
-    fi
+	if [ -z "$ARCH" ]; then
+		echo "please input arch."
+		return 1;
+	fi
 
-    if [ -z "$OUTPUTDIR" ]; then
-        OUTPUTDIR=$CURR_DIR;
-    fi
+	if [ -z "$FILEARCH" ]; then
+		FILEARCH=$ARCH
+	fi
 
-    build
+	if [ -z "$OUTPUTDIR" ]; then
+		OUTPUTDIR=$CURR_DIR;
+	fi
+
+	build
 }
 
 main $@

package/openwrt/Makefile

@@ -1,34 +1,62 @@
+#
+# Copyright (c) 2018-2019 Nick Peng (pymumu@gmail.com)
+# This is free software, licensed under the GNU General Public License v3.
+#
+
 include $(TOPDIR)/rules.mk
 
-PKG_NAME:=smarttdns
-PKG_VERSION:=2018.7.1.1607
-PKG_RELEASE:=$(PKG_SOURCE_VERSION)
+PKG_NAME:=smartdns
+PKG_VERSION:=1.2019.28
+PKG_RELEASE:=1
 
-PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
+PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://www.github.com/pymumu/smartdns.git
+PKG_SOURCE_VERSION:=982002e836e486fb4e360bc10e84e7e7197caf46
+PKG_MIRROR_HASH:=ae889b521ecf114660ce5597af5c361f5970a7dcb75dadf61b938ba3d2baba54
+
+PKG_MAINTAINER:=Nick Peng <pymumu@gmail.com>
+PKG_LICENSE:=GPL-3.0-or-later
+PKG_LICENSE_FILES:=LICENSE
+
+PKG_BUILD_PARALLEL:=1
 
 include $(INCLUDE_DIR)/package.mk
 
+MAKE_VARS += VER=$(PKG_VERSION) 
+MAKE_PATH:=src
+
 define Package/smartdns
-	SECTION:=net
-	CATEGORY:=Network
-	TITLE:=smartdns
-	URL:=https://github.com/pymumu/smartdns
-	MAINTAINER:=Nick Peng <pymumu@gmail.com>
-	DEPENDS:=
+  SECTION:=net
+  CATEGORY:=Network
+  TITLE:=smartdns server
+  DEPENDS:=+libpthread +libopenssl
+  URL:=https://www.github.com/pymumu/smartdns/
 endef
 
 define Package/smartdns/description
-	smartdns server, find fastest ip.
+SmartDNS is a local DNS server which accepts DNS query requests from local network clients,
+get DNS query results from multiple upstream DNS servers concurrently, and returns the fastest IP to clients.
+Unlike dnsmasq's all-servers, smartdns returns the fastest IP. 
 endef
 
-define Build/Prepare
-	mkdir -p $(PKG_BUILD_DIR)
-	cp -r ../* $(PKG_BUILD_DIR)
+define Package/smartdns/conffiles
+/etc/config/smartdns
+/etc/smartdns/address.conf
+/etc/smartdns/blacklist-ip.conf
+/etc/smartdns/custom.conf
 endef
 
 define Package/smartdns/install
-	$(INSTALL_DIR) $(1)/usr/sbin
-	$(INSTALL_BIN) $(PKG_BUILD_DIR)/smartdns $(1)/usr/sbin
+	$(INSTALL_DIR) $(1)/usr/sbin $(1)/etc/config $(1)/etc/init.d $(1)/etc/smartdns
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/src/smartdns $(1)/usr/sbin/smartdns
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/package/openwrt/files/etc/init.d/smartdns $(1)/etc/init.d/smartdns
+	$(INSTALL_CONF) $(PKG_BUILD_DIR)/package/openwrt/address.conf $(1)/etc/smartdns/address.conf
+	$(INSTALL_CONF) $(PKG_BUILD_DIR)/package/openwrt/blacklist-ip.conf $(1)/etc/smartdns/blacklist-ip.conf
+	$(INSTALL_CONF) $(PKG_BUILD_DIR)/package/openwrt/custom.conf $(1)/etc/smartdns/custom.conf
+	$(INSTALL_CONF) $(PKG_BUILD_DIR)/package/openwrt/files/etc/config/smartdns $(1)/etc/config/smartdns
 endef
 
-$(eval $(call BuildPackage, smartdns))
+$(eval $(call BuildPackage,smartdns))

package/openwrt/address.conf

@@ -1,11 +1,16 @@
-# Add domains which you want to force to an IP address here.
-# The example below send any host in example.com to a local webserver.
-# address /domain/[ip|-|-4|-6|#|#4|#6]
-# address /www.example.com/1.2.3.4, return ip 1.2.3.4 to client
-# address /www.example.com/-, ignore address, query from upstream, suffix 4, for ipv4, 6 for ipv6, none for all
-# address /www.example.com/#, return SOA to client, suffix 4, for ipv4, 6 for ipv6, none for all
-
-# specific ipset to domain
-# ipset /domain/[ipset|-]
-# ipset /www.example.com/block, set ipset with ipset name of block 
-# ipset /www.example.com/-, ignore this domain
+# Add domains which you want to force to an IP address here.
+# The example below send any host in example.com to a local webserver.
+# address /domain/[ip|-|-4|-6|#|#4|#6]
+# address /www.example.com/1.2.3.4, return ip 1.2.3.4 to client
+# address /www.example.com/-, ignore address, query from upstream, suffix 4, for ipv4, 6 for ipv6, none for all
+# address /www.example.com/#, return SOA to client, suffix 4, for ipv4, 6 for ipv6, none for all
+
+# specific ipset to domain
+# ipset /domain/[ipset|-]
+# ipset /www.example.com/block, set ipset with ipset name of block 
+# ipset /www.example.com/-, ignore this domain
+
+# specific nameserver to domain
+# nameserver /domain/[group|-]
+# nameserver /www.example.com/office, Set the domain name to use the appropriate server group.
+# nameserver /www.example.com/-, ignore this domain

package/openwrt/blacklist-ip.conf

@@ -1,4 +1,4 @@
-# Add IP blacklist which you want to filtering from some DNS server here.
-# The example below filtering ip from the result of DNS server which is configured with -blacklist-ip.
-# blacklist-ip [ip/subnet]
+# Add IP blacklist which you want to filtering from some DNS server here.
+# The example below filtering ip from the result of DNS server which is configured with -blacklist-ip.
+# blacklist-ip [ip/subnet]
 # blacklist-ip 254.0.0.1/16

package/openwrt/control/postinst

@@ -1,23 +1,25 @@
 #!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 chmod +x /usr/sbin/smartdns
 chmod +x /etc/init.d/smartdns
 mkdir -p /var/etc/smartdns/
 
 [ "${IPKG_NO_SCRIPT}" = "1" ] && exit 0
-
-if [ ! -f "/var/etc/smartdns/address.conf" ]; then
-    cp /etc/smartdns/address.conf /var/etc/smartdns/address.conf
-fi
-
-if [ ! -f "/var/etc/smartdns/blacklist-ip.conf" ]; then
-    cp /etc/smartdns/blacklist-ip.conf /var/etc/smartdns/blacklist-ip.conf
-fi
-
-if [ ! -f "/var/etc/smartdns/custom.conf" ]; then
-    cp /etc/smartdns/custom.conf /var/etc/smartdns/custom.conf
-fi
-
 . ${IPKG_INSTROOT}/lib/functions.sh
 default_postinst $0 $@
 ret=$?

package/openwrt/control/prerm

@@ -1,4 +1,20 @@
 #!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 . ${IPKG_INSTROOT}/lib/functions.sh
 default_prerm $0 $@
 rm /var/etc/smartdns.conf -f

package/openwrt/custom.conf

@@ -1,14 +1,14 @@
-# Add custom settings here.
-
-# set log level
-# log-level [level], level=error, warn, info, debug
-# log-level error
-
-# log-size k,m,g
-# log-size 128k
-
-# log-file /var/log/smartdns.log
-# log-num 2
-
-# List of hosts that supply bogus NX domain results 
+# Add custom settings here.
+
+# set log level
+# log-level [level], level=fatal, error, warn, notice, info, debug
+# log-level error
+
+# log-size k,m,g
+# log-size 128k
+
+# log-file /var/log/smartdns.log
+# log-num 2
+
+# List of hosts that supply bogus NX domain results 
 # bogus-nxdomain [ip/subnet]

package/openwrt/files/etc/init.d/smartdns

@@ -1,5 +1,19 @@
 #!/bin/sh /etc/rc.common
-# Copyright (C) 2018 Nick Peng (pymumu@gmail.com)
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 START=99
 NAME=smartdns
@@ -8,7 +22,6 @@ SERVICE_USE_PID=1
 SERVICE_WRITE_PID=1
 SERVICE_DAEMONIZE=1
 SERVICE_PID_FILE="/var/run/smartdns.pid"
-BASECONFIGFILE="/etc/smartdns/smartdns.conf"
 SMARTDNS_CONF_DIR="/etc/smartdns"
 SMARTDNS_VAR_CONF_DIR="/var/etc/smartdns"
 SMARTDNS_CONF="$SMARTDNS_VAR_CONF_DIR/smartdns.conf"
@@ -23,22 +36,18 @@ set_forward_dnsmasq()
 {
 	local PORT="$1"
 	addr="127.0.0.1#$PORT"
-	OLD_SERVER="`uci get dhcp.@dnsmasq[0].server 2>/dev/null`"
-	echo $OLD_SERVER | grep "^$addr" >/dev/null 2>&1
-	if [ $? -eq 0 ]; then
+	OLD_SERVER="$(uci get dhcp.@dnsmasq[0].server 2>/dev/null)"
+	if echo "$OLD_SERVER" | grep "^$addr" >/dev/null 2>&1; then
 		return
 	fi
 	uci delete dhcp.@dnsmasq[0].server 2>/dev/null
-	uci add_list dhcp.@dnsmasq[0].server=$addr
+	uci add_list dhcp.@dnsmasq[0].server="$addr"
 	for server in $OLD_SERVER; do
-		if [ "$server" = "$addr" ]; then
-			continue
-		fi
-		uci add_list dhcp.@dnsmasq[0].server=$server
+		[ "$server" = "$addr" ] && continue
+		uci add_list dhcp.@dnsmasq[0].server="$server"
 	done
-	uci delete dhcp.@dnsmasq[0].resolvfile 2>/dev/null
 	uci set dhcp.@dnsmasq[0].noresolv=1
-	uci commit dhcp 
+	uci commit dhcp
 	/etc/init.d/dnsmasq restart
 }
 
@@ -46,18 +55,16 @@ stop_forward_dnsmasq()
 {
 	local OLD_PORT="$1"
 	addr="127.0.0.1#$OLD_PORT"
-	OLD_SERVER="`uci get dhcp.@dnsmasq[0].server 2>/dev/null`"
-	echo $OLD_SERVER | grep "^$addr" >/dev/null 2>&1
-	if [ $? -ne 0 ]; then
+	OLD_SERVER="$(uci get dhcp.@dnsmasq[0].server 2>/dev/null)"
+	if ! echo "$OLD_SERVER" | grep "^$addr" >/dev/null 2>&1; then
 		return
 	fi
 
-	uci del_list dhcp.@dnsmasq[0].server=$addr 2>/dev/null
-	addrlist="`uci get dhcp.@dnsmasq[0].server 2>/dev/null`"
-	if [ -z "$addrlist" ] ; then
-		uci set dhcp.@dnsmasq[0].resolvfile=/tmp/resolv.conf.auto 2>/dev/null
+	uci del_list dhcp.@dnsmasq[0].server="$addr" 2>/dev/null
+	addrlist="$(uci get dhcp.@dnsmasq[0].server 2>/dev/null)"
+	[ -z "$addrlist" ] && {
 		uci delete dhcp.@dnsmasq[0].noresolv 2>/dev/null
-	fi
+	}
 	uci commit dhcp
 	/etc/init.d/dnsmasq restart
 }
@@ -67,26 +74,24 @@ set_iptable()
 	local ipv6_server=$1
 	local tcp_server=$2
 
-	IPS="`ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F : '{print $2}'`"
+	IPS="$(ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F : '{print $2}')"
 	for IP in $IPS
 	do
-		if [ "$tcp_server" == "1" ]; then
-			iptables -t nat -A PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $SMARTDNS_PORT >/dev/null 2>&1
+		if [ "$tcp_server" = "1" ]; then
+			iptables -t nat -A PREROUTING -p tcp -d "$IP" --dport 53 -j REDIRECT --to-ports "$SMARTDNS_PORT" >/dev/null 2>&1
 		fi
-		iptables -t nat -A PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $SMARTDNS_PORT >/dev/null 2>&1
+		iptables -t nat -A PREROUTING -p udp -d "$IP" --dport 53 -j REDIRECT --to-ports "$SMARTDNS_PORT" >/dev/null 2>&1
 	done
 
-	if [ "$ipv6_server" == 0 ]; then
-		return
-	fi
+	[ "$ipv6_server" = 0 ] && return
 
-	IPS="`ifconfig | grep "inet6 addr" | grep -v " fe80::" | grep -v " ::1" | grep "Global" | awk '{print $3}'`"
+	IPS="$(ifconfig | grep "inet6 addr" | grep -v " fe80::" | grep -v " ::1" | grep "Global" | awk '{print $3}')"
 	for IP in $IPS
 	do
-		if [ "$tcp_server" == "1" ]; then
-			ip6tables -t nat -A PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $SMARTDNS_PORT >/dev/null 2>&1
+		if [ "$tcp_server" = "1" ]; then
+			ip6tables -t nat -A PREROUTING -p tcp -d "$IP" --dport 53 -j REDIRECT --to-ports "$SMARTDNS_PORT" >/dev/null 2>&1
 		fi
-		ip6tables -t nat -A PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $SMARTDNS_PORT >/dev/null 2>&1
+		ip6tables -t nat -A PREROUTING -p udp -d "$IP" --dport 53 -j REDIRECT --to-ports "$SMARTDNS_PORT" >/dev/null 2>&1
 	done
 
 }
@@ -95,24 +100,22 @@ clear_iptable()
 {
 	local OLD_PORT="$1"
 	local ipv6_server=$2
-	IPS="`ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F : '{print $2}'`"
+	IPS="$(ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F : '{print $2}')"
 	for IP in $IPS
 	do
-		iptables -t nat -D PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $OLD_PORT >/dev/null 2>&1
-		iptables -t nat -D PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $OLD_PORT >/dev/null 2>&1
+		iptables -t nat -D PREROUTING -p udp -d "$IP" --dport 53 -j REDIRECT --to-ports "$OLD_PORT" >/dev/null 2>&1
+		iptables -t nat -D PREROUTING -p tcp -d "$IP" --dport 53 -j REDIRECT --to-ports "$OLD_PORT" >/dev/null 2>&1
 	done
 
-	if [ "$ipv6_server" == 0 ]; then
-		return
-	fi
+	[ "$ipv6_server" = 0 ] && return
 
-	IPS="`ifconfig | grep "inet6 addr" | grep -v " fe80::" | grep -v " ::1" | grep "Global" | awk '{print $3}'`"
+	IPS="$(ifconfig | grep "inet6 addr" | grep -v " fe80::" | grep -v " ::1" | grep "Global" | awk '{print $3}')"
 	for IP in $IPS
 	do
-		ip6tables -t nat -D PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $OLD_PORT >/dev/null 2>&1
-		ip6tables -t nat -D PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $OLD_PORT >/dev/null 2>&1
+		ip6tables -t nat -D PREROUTING -p udp -d "$IP" --dport 53 -j REDIRECT --to-ports "$OLD_PORT" >/dev/null 2>&1
+		ip6tables -t nat -D PREROUTING -p tcp -d "$IP" --dport 53 -j REDIRECT --to-ports "$OLD_PORT" >/dev/null 2>&1
 	done
-	
+
 }
 
 service_triggers() {
@@ -120,28 +123,49 @@ service_triggers() {
 	procd_add_reload_trigger smartdns
 }
 
-
 conf_append()
 {
 	echo "$1 $2" >> $SMARTDNS_CONF_TMP
 }
 
+get_tz()
+{
+	SET_TZ=""
+
+	[ -e "/etc/localtime" ] && return
+
+	for tzfile in /etc/TZ /var/etc/TZ
+	do
+		[ -e "$tzfile" ] || continue
+		tz="$(cat $tzfile 2>/dev/null)"
+	done
+
+	[ -z "$tz" ] && return
+
+	SET_TZ=$tz
+}
+
 load_server()
 {
 	local section="$1"
 	local ADDITIONAL_ARGS=""
 	local DNS_ADDRESS=""
 
-	config_get_bool "enabled" "$section" "enabled" "1"
-	config_get "port" "$section" "port" ""
-	config_get "type" "$section" "type" "udp"
-	config_get "ip" "$section" "ip" ""
-	config_get "blacklist_ip" "$section" "blacklist_ip" "0"
-	config_get "check_edns" "$section" "check_edns" "0"
+	config_get_bool enabled "$section" "enabled" "1"
+	config_get port "$section" "port" ""
+	config_get type "$section" "type" "udp"
+	config_get ip "$section" "ip" ""
+	config_get tls_host_verify "$section" "tls_host_verify" ""
+	config_get no_check_certificate "$section" "no_check_certificate" "0"
+	config_get host_name "$section" "host_name" ""
+	config_get http_host "$section" "http_host" ""
+	config_get server_group "$section" "server_group" ""
+	config_get blacklist_ip "$section" "blacklist_ip" "0"
+	config_get check_edns "$section" "check_edns" "0"
+	config_get spki_pin "$section" "spki_pin" ""
+	config_get addition_arg "$section" "addition_arg" ""
 
-	if [ "$enabled" = "0" ]; then
-		return
-	fi
+	[ "$enabled" = "0" ] && return
 
 	if [ -z "$ip" ] || [ -z "$type" ]; then
 		return
@@ -152,134 +176,165 @@ load_server()
 		SERVER="server-tcp"
 	elif [ "$type" = "tls" ]; then
 		SERVER="server-tls"
+	elif [ "$type" = "https" ]; then
+		SERVER="server-https"
 	fi
 
-	if [ ! -z "`echo $ip | grep ":"`" ]; then
-		if [ -z "`echo $ip | grep "\["`" ]; then
+	if echo "$ip" | grep ":" | grep -q -v "https://" >/dev/null 2>&1; then
+		if ! echo "$ip" | grep -q "\\[" >/dev/null 2>&1; then
 			ip="[$ip]"
 		fi
 	fi
 
-	if [ "$blacklist_ip" != "0" ]; then
-		ADDITIONAL_ARGS="$ADDITIONAL_ARGS -blacklist-ip"
-	fi
+	[ -z "$tls_host_verify" ] || ADDITIONAL_ARGS="$ADDITIONAL_ARGS -tls-host-verify $tls_host_verify"
+	[ "$no_check_certificate" = "0" ] || ADDITIONAL_ARGS="$ADDITIONAL_ARGS -no-check-certificate"
+	[ -z "$host_name" ] || ADDITIONAL_ARGS="$ADDITIONAL_ARGS -host-name $host_name"
+	[ -z "$http_host" ] || ADDITIONAL_ARGS="$ADDITIONAL_ARGS -http-host $http_host"
+	[ -z "$server_group" ] || ADDITIONAL_ARGS="$ADDITIONAL_ARGS -group $server_group"
+	[ "$blacklist_ip" = "0" ] || ADDITIONAL_ARGS="$ADDITIONAL_ARGS -blacklist-ip"
+	[ "$check_edns" = "0" ] || ADDITIONAL_ARGS="$ADDITIONAL_ARGS -check-edns"
+	[ -z "$spki_pin" ] || ADDITIONAL_ARGS="$ADDITIONAL_ARGS -spki-pin $spki_pin"
 
-	if [ "$check_edns" != "0" ]; then
-		ADDITIONAL_ARGS="$ADDITIONAL_ARGS -check-edns"
-	fi
-
-	if [ ! -z "$port" ]; then
-		DNS_ADDRESS="$ip:$port"
-	else
+	if [ -z "$port" ]; then
 		DNS_ADDRESS="$ip"
+	else
+		DNS_ADDRESS="$ip:$port"
 	fi
 
-	conf_append "$SERVER" "$DNS_ADDRESS $ADDITIONAL_ARGS"
+	[ "$type" = "https" ] && DNS_ADDRESS="$ip"
+
+	conf_append "$SERVER" "$DNS_ADDRESS $ADDITIONAL_ARGS $addition_arg"
 }
 
-load_service() {
+load_second_server()
+{
+	local section="$1"
+	local ARGS=""
+	local ADDR=""
+
+	config_get_bool seconddns_enabled "$section" "seconddns_enabled" "0"
+	[ "$seconddns_enabled" = "0" ] && return
+
+	config_get seconddns_port "$section" "seconddns_port" "6553"
+
+	config_get_bool seconddns_no_speed_check "$section" "seconddns_no_speed_check" "0"
+	[ "$seconddns_no_speed_check" = "1" ] && ARGS="$ARGS -no-speed-check"
+
+	config_get seconddns_server_group "$section" "seconddns_server_group" ""
+	[ -z "$seconddns_server_group" ] || ARGS="$ARGS -group $seconddns_server_group"
+
+	config_get_bool seconddns_no_rule_addr "$section" "seconddns_no_rule_addr" "0"
+	[ "$seconddns_no_rule_addr" = "1" ] && ARGS="$ARGS -no-rule-addr"
+
+	config_get_bool seconddns_no_rule_nameserver "$section" "seconddns_no_rule_nameserver" "0"
+	[ "$seconddns_no_rule_nameserver" = "1" ] && ARGS="$ARGS -no-rule-nameserver"
+
+	config_get_bool seconddns_no_rule_ipset "$section" "seconddns_no_rule_ipset" "0"
+	[ "$seconddns_no_rule_ipset" = "1" ] && ARGS="$ARGS -no-rule-ipset"
+
+	config_get_bool seconddns_no_rule_soa "$section" "seconddns_no_rule_soa" "0"
+	[ "$seconddns_no_rule_soa" = "1" ] && ARGS="$ARGS -no-rule-soa"
+
+	config_get_bool seconddns_no_dualstack_selection "$section" "seconddns_no_dualstack_selection" "0"
+	[ "$seconddns_no_dualstack_selection" = "1" ] && ARGS="$ARGS -no-dualstack-selection"
+
+	config_get_bool seconddns_no_cache "$section" "seconddns_no_cache" "0"
+	[ "$seconddns_no_cache" = "1" ] && ARGS="$ARGS -no-cache"
+
+	config_get_bool force_aaaa_soa "$section" "force_aaaa_soa" "0"
+	[ "$force_aaaa_soa" = "1" ] && ARGS="$ARGS -force-aaaa-soa"
+
+	config_get ipv6_server "$section" "ipv6_server" "1"
+	if [ "$ipv6_server" = "1" ]; then
+		ADDR="[::]"
+	else
+		ADDR=""
+	fi
+
+	conf_append "bind" "$ADDR:$seconddns_port $ARGS"
+	config_get_bool "seconddns_tcp_server" "$section" "seconddns_tcp_server" "1"
+	[ "$seconddns_tcp_server" = "1" ] && conf_append "bind-tcp" "$ADDR:$seconddns_port $ARGS"
+}
+
+load_service()
+{
 	local section="$1"
 	args=""
 
 	mkdir -p $SMARTDNS_VAR_CONF_DIR
 	rm -f $SMARTDNS_CONF_TMP
 
-	config_get_bool "enabled" "$section" "enabled" '0'
+	config_get_bool enabled "$section" "enabled" '0'
 
-	config_get "server_name" "$section" "server_name" ""
-	if [ ! -z "$server_name" ]; then
-		conf_append "server-name" "$server_name"	
-	fi
+	config_get server_name "$section" "server_name" ""
+	[ -z "$server_name" ] || conf_append "server-name" "$server_name"
 
-	config_get "coredump" "$section" "coredump" "0"
-	if [ "$coredump" = "1" ]; then
-		COREDUMP="1"
-	fi
+	config_get coredump "$section" "coredump" "0"
+	[ "$coredump" = "1" ] && COREDUMP="1"
 
-	config_get "port" "$section" "port" "6053"
-	config_get "ipv6_server" "$section" "ipv6_server" "1"
-	config_get "tcp_server" "$section" "tcp_server" "1"
+	config_get port "$section" "port" "6053"
+	config_get ipv6_server "$section" "ipv6_server" "1"
+	config_get tcp_server "$section" "tcp_server" "1"
 	if [ "$ipv6_server" = "1" ]; then
 		conf_append "bind" "[::]:$port"
 	else
 		conf_append "bind" ":$port"
 	fi
 
-	if [ "$tcp_server" = "1" ]; then
+	[ "$tcp_server" = "1" ] && {
 		if [ "$ipv6_server" = "1" ]; then
 			conf_append "bind-tcp" "[::]:$port"
 		else
 			conf_append "bind-tcp" ":$port"
 		fi
-	fi
-	config_get "dualstack_ip_selection" "$section" "dualstack_ip_selection" "0"
-	if [ "$dualstack_ip_selection" = "1" ]; then
-		conf_append "dualstack-ip-selection" "yes"
-	fi
+	}
+	config_get dualstack_ip_selection "$section" "dualstack_ip_selection" "0"
+	[ "$dualstack_ip_selection" = "1" ] && conf_append "dualstack-ip-selection" "yes"
 
-	config_get "prefetch_domain" "$section" "prefetch_domain" "0"
-	if [ "$prefetch_domain" = "1" ]; then
-		conf_append "prefetch-domain" "yes"
-	fi
+	config_get prefetch_domain "$section" "prefetch_domain" "0"
+	[ "$prefetch_domain" = "1" ] && conf_append "prefetch-domain" "yes"
+
+	config_get serve_expired "$section" "serve_expired" "0"
+	[ "$serve_expired" = "1" ] && conf_append "serve-expired" "yes"
 
 	SMARTDNS_PORT="$port"
 
-	config_get "cache_size" "$section" "cache_size" ""
-	if [ ! -z "$cache_size" ]; then
-		conf_append "cache-size" "$cache_size"
-	fi
+	config_get cache_size "$section" "cache_size" ""
+	[ -z "$cache_size" ] || conf_append "cache-size" "$cache_size"
 
-	config_get "rr_ttl" "$section" "rr_ttl" ""
-	if [ ! -z "$rr_ttl" ]; then
-		conf_append "rr-ttl" "$rr_ttl"
-	fi
+	config_get rr_ttl "$section" "rr_ttl" ""
+	[ -z "$rr_ttl" ] || conf_append "rr-ttl" "$rr_ttl"
 
-	config_get "rr_ttl_min" "$section" "rr_ttl_min" ""
-	if [ ! -z "$rr_ttl_min" ]; then
-		conf_append "rr-ttl-min" "$rr_ttl_min"
-	fi
+	config_get rr_ttl_min "$section" "rr_ttl_min" ""
+	[ -z "$rr_ttl_min" ] || conf_append "rr-ttl-min" "$rr_ttl_min"
 
-	config_get "rr_ttl_max" "$section" "rr_ttl_max" ""
-	if [ ! -z "$rr_ttl_max" ]; then
-		conf_append "rr-ttl-max" "$rr_ttl_max"
-	fi
+	config_get rr_ttl_max "$section" "rr_ttl_max" ""
+	[ -z "$rr_ttl_max" ] || conf_append "rr-ttl-max" "$rr_ttl_max"
 
-	config_get "log_size" "$section" "log_size" "64K"
-	if [ ! -z "$log_size" ]; then
-		conf_append "log-size" "$log_size"
-	fi
+	config_get log_size "$section" "log_size" "64K"
+	[ -z "$log_size" ] || conf_append "log-size" "$log_size"
 
-	config_get "log_num" "$section" "log_num" "1"
-	if [ ! -z "$log_num" ]; then
-		conf_append "log-num" "$log_num"
-	fi
+	config_get log_num "$section" "log_num" "1"
+	[ -z "$log_num" ] || conf_append "log-num" "$log_num"
 
-	config_get "log_level" "$section" "log_level" "error"
-	if [ ! -z "$log_level" ]; then
-		conf_append "log-level" "$log_level"
-	fi
+	config_get log_level "$section" "log_level" "error"
+	[ -z "$log_level" ]|| conf_append "log-level" "$log_level"
 
-	config_get "log_file" "$section" "log_file" ""
-	if [ ! -z "$log_file" ]; then
-		conf_append "log-file" "$log_file"
-	fi
+	config_get log_file "$section" "log_file" ""
+	[ -z "$log_file" ] || conf_append "log-file" "$log_file"
 
-	config_get "redirect" "$section" "redirect" "none"
-	config_get "old_redirect" "$section" "old_redirect" "none"
-	config_get "old_port" "$section" "old_port" "0"
-	config_get "old_enabled" "$section" "old_enabled" "0"
+	config_get redirect "$section" "redirect" "none"
+	config_get old_redirect "$section" "old_redirect" "none"
+	config_get old_port "$section" "old_port" "0"
+	config_get old_enabled "$section" "old_enabled" "0"
 
 	if [ "$old_redirect" != "$redirect" ] || [ "$old_port" != "$SMARTDNS_PORT" ] || [ "$old_enabled" = "1" -a "$enabled" = "0" ]; then
-		if [ "$old_redirect" != "none" ]; then
-			if [ "$old_port" != "0" ]; then
-				clear_iptable "$old_port" "$ipv6_server"
-			fi
-			if [ "$old_redirect" == "dnsmasq-upstream" ]; then
-				stop_forward_dnsmasq "$old_port"
-			fi
-		fi
+		[ "$old_redirect" = "none" ] || {
+			[ "$old_port" = "0" ] || clear_iptable "$old_port" "$ipv6_server"
+			[ "$old_redirect" = "dnsmasq-upstream" ] && stop_forward_dnsmasq "$old_port"
+		}
 	fi
-	
+
 	uci delete smartdns.@smartdns[0].old_redirect 2>/dev/null
 	uci delete smartdns.@smartdns[0].old_port 2>/dev/null
 	uci delete smartdns.@smartdns[0].old_enabled 2>/dev/null
@@ -296,33 +351,40 @@ load_service() {
 		set_forward_dnsmasq "$SMARTDNS_PORT"
 	fi
 
+	load_second_server $section
+
 	config_foreach load_server "server"
 
-	echo "conf-file $ADDRESS_CONF" >> $SMARTDNS_CONF_TMP
-	echo "conf-file $BLACKLIST_IP_CONF" >> $SMARTDNS_CONF_TMP
-	echo "conf-file $CUSTOM_CONF" >> $SMARTDNS_CONF_TMP
+	{
+		echo "conf-file $ADDRESS_CONF"
+		echo "conf-file $BLACKLIST_IP_CONF"
+		echo "conf-file $CUSTOM_CONF"
+	} >> $SMARTDNS_CONF_TMP
 	mv $SMARTDNS_CONF_TMP $SMARTDNS_CONF
 
 	procd_open_instance "smartdns"
-	if [ "$COREDUMP" = "1" ]; then
+	[ "$COREDUMP" = "1" ] && {
 		args="$args -S"
 		procd_set_param limits core="unlimited"
-	fi
-	
+	}
+
+	get_tz
+	[ -z "$SET_TZ" ] || procd_set_param env TZ="$SET_TZ"
+
 	procd_set_param command /usr/sbin/smartdns -f -c $SMARTDNS_CONF $args
-	if [ "$RESPAWN" = "1" ]; then
-		procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
-	fi
+	[ "$RESPAWN" = "1" ] &&	procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
 	procd_set_param file "$SMARTDNS_CONF"
 	procd_close_instance
 }
 
-start_service() {
+start_service()
+{
 	config_load "smartdns"
 	config_foreach load_service "smartdns"
 }
 
-reload_service(){
+reload_service()
+{
 	stop
 	start
 }

package/openwrt/make.sh

@@ -1,5 +1,19 @@
-#/bin/sh
-
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 CURR_DIR=$(cd $(dirname $0);pwd)
 
 VER="`date +"1.%Y.%m.%d-%H%M"`"
@@ -16,52 +30,57 @@ showhelp()
 	echo "Options:"
 	echo " -o               output directory."
 	echo " --arch           archtecture."
-    echo " --ver            version."
+	echo " --ver            version."
 	echo " -h               show this message."
 }
 
 build()
 {
-    ROOT=/tmp/smartdns-openwrt
-    rm -fr $ROOT
+	ROOT=/tmp/smartdns-openwrt
+	rm -fr $ROOT
 
-    mkdir -p $ROOT
-    cp $CURR_DIR/* $ROOT/ -af
-    cd $ROOT/
-    mkdir $ROOT/root/usr/sbin -p
-    mkdir $ROOT/root/etc/init.d -p
-    mkdir $ROOT/root/etc/smartdns/ -p
+	mkdir -p $ROOT
+	cp $CURR_DIR/* $ROOT/ -af
+	cd $ROOT/
+	mkdir $ROOT/root/usr/sbin -p
+	mkdir $ROOT/root/etc/init.d -p
+	mkdir $ROOT/root/etc/smartdns/ -p
 
-    cp $SMARTDNS_CONF  $ROOT/root/etc/smartdns/
-    cp $ADDRESS_CONF $ROOT/root/etc/smartdns/
-    cp $BLACKLIST_IP_CONF $ROOT/root/etc/smartdns/
-    cp $CUSTOM_CONF $ROOT/root/etc/smartdns/
-    cp $CURR_DIR/files/etc $ROOT/root/ -af
-    cp $SMARTDNS_BIN $ROOT/root/usr/sbin
+	cp $SMARTDNS_CONF  $ROOT/root/etc/smartdns/
+	cp $ADDRESS_CONF $ROOT/root/etc/smartdns/
+	cp $BLACKLIST_IP_CONF $ROOT/root/etc/smartdns/
+	cp $CUSTOM_CONF $ROOT/root/etc/smartdns/
+	cp $CURR_DIR/files/etc $ROOT/root/ -af
+	cp $SMARTDNS_BIN $ROOT/root/usr/sbin
+	if [ $? -ne 0 ]; then
+		echo "copy smartdns file failed."
+		rm -fr $ROOT/
+		return 1
+	fi
 
-    chmod +x $ROOT/root/etc/init.d/smartdns
-    INST_SIZE="`du -sb $ROOT/root/ | awk '{print $1}'`"
+	chmod +x $ROOT/root/etc/init.d/smartdns
+	INST_SIZE="`du -sb $ROOT/root/ | awk '{print $1}'`"
 
-    sed -i "s/^Architecture.*/Architecture: $ARCH/g" $ROOT/control/control
-    sed -i "s/Version:.*/Version: $VER/" $ROOT/control/control
-    sed -i "s/^\(bind .*\):53/\1:6053/g" $ROOT/root/etc/smartdns/smartdns.conf
-    if [ ! -z "$INST_SIZE" ]; then
-        echo "Installed-Size: $INST_SIZE" >> $ROOT/control/control
-    fi
+	sed -i "s/^Architecture.*/Architecture: $ARCH/g" $ROOT/control/control
+	sed -i "s/Version:.*/Version: $VER/" $ROOT/control/control
+	sed -i "s/^\(bind .*\):53/\1:6053/g" $ROOT/root/etc/smartdns/smartdns.conf
+	if [ ! -z "$INST_SIZE" ]; then
+		echo "Installed-Size: $INST_SIZE" >> $ROOT/control/control
+	fi
 
-    cd $ROOT/control
-    chmod +x *
-    tar zcf ../control.tar.gz --owner=0 --group=0 ./
-    cd $ROOT
+	cd $ROOT/control
+	chmod +x *
+	tar zcf ../control.tar.gz --owner=0 --group=0 ./
+	cd $ROOT
 
-    tar zcf $ROOT/data.tar.gz -C root --owner=0 --group=0 .
-    tar zcf $OUTPUTDIR/smartdns.$VER.$ARCH.ipk --owner=0 --group=0 control.tar.gz data.tar.gz debian-binary
-    rm -fr $ROOT/
+	tar zcf $ROOT/data.tar.gz -C root --owner=0 --group=0 .
+	tar zcf $OUTPUTDIR/smartdns.$VER.$FILEARCH.ipk --owner=0 --group=0 control.tar.gz data.tar.gz debian-binary
+	rm -fr $ROOT/
 }
 
 main()
 {
-	OPTS=`getopt -o o:h --long arch:,ver: \
+	OPTS=`getopt -o o:h --long arch:,ver:,filearch: \
 		-n  "" -- "$@"`
 
 	if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
@@ -74,31 +93,38 @@ main()
 		--arch)
 			ARCH="$2"
 			shift 2;;
-        --ver)
-            VER="$2"
-            shift 2;;
+		--filearch)
+			FILEARCH="$2"
+			shift 2;;
+		--ver)
+			VER="$2"
+			shift 2;;
 		-o )
 			OUTPUTDIR="$2"
 			shift 2;;
-        -h | --help )
+		-h | --help )
 			showhelp
 			return 0
 			shift ;;
 		-- ) shift; break ;;
 		* ) break ;;
-  		esac
+		esac
 	done
 
-    if [ -z "$ARCH" ]; then
-        echo "please input arch."
-        return 1;
-    fi
+	if [ -z "$ARCH" ]; then
+		echo "please input arch."
+		return 1;
+	fi
 
-    if [ -z "$OUTPUTDIR" ]; then
-        OUTPUTDIR=$CURR_DIR;
-    fi
+	if [ -z "$FILEARCH" ]; then
+		FILEARCH=$ARCH
+	fi
 
-    build
+	if [ -z "$OUTPUTDIR" ]; then
+		OUTPUTDIR=$CURR_DIR;
+	fi
+
+	build
 }
 
 main $@

package/optware/S50smartdns

@@ -1,9 +1,24 @@
-#! /bin/sh
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 SMARTDNS_BIN=/opt/usr/sbin/smartdns
 SMARTDNS_CONF=/opt/etc/smartdns/smartdns.conf
-DNSMASQ_CONF=/etc/dnsmasq.conf
-SMARTDNS_PID="/var/run/smartdns.pid"
+DNSMASQ_CONF="/etc/dnsmasq.conf /var/etc/dnsmasq.conf /etc/storage/dnsmasq/dnsmasq.conf"
+SMARTDNS_PID=/var/run/smartdns.pid
 SMARTDNS_PORT=535
 SMARTDNS_OPT=/opt/etc/smartdns/smartdns-opt.conf
 # workmode 
@@ -28,123 +43,184 @@ set_iptable()
 		redirect_tcp=1;
 	fi
 
-	IPS="`ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F: '{print $2}'`"
+	IPS="$(ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F: '{print $2}')"
 	for IP in $IPS
 	do
 		if [ $redirect_tcp -eq 1 ]; then
-			iptables -t nat -A PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $SMARTDNS_PORT > /dev/null 2>&1
+			iptables -t nat -A PREROUTING -p tcp -d "$IP" --dport 53 -j REDIRECT --to-ports "$SMARTDNS_PORT" > /dev/null 2>&1
 		fi
-		iptables -t nat -A PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $SMARTDNS_PORT > /dev/null 2>&1
+		iptables -t nat -A PREROUTING -p udp -d "$IP" --dport 53 -j REDIRECT --to-ports "$SMARTDNS_PORT" > /dev/null 2>&1
 	done
 
 }
 
 clear_iptable()
 {
-	IPS="`ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F: '{print $2}'`"
+	IPS="$(ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F: '{print $2}')"
 	for IP in $IPS
 	do
-		iptables -t nat -D PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $SMARTDNS_PORT > /dev/null 2>&1
-		iptables -t nat -D PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $SMARTDNS_PORT > /dev/null 2>&1
+		iptables -t nat -D PREROUTING -p tcp -d "$IP" --dport 53 -j REDIRECT --to-ports "$SMARTDNS_PORT" > /dev/null 2>&1
+		iptables -t nat -D PREROUTING -p udp -d "$IP" --dport 53 -j REDIRECT --to-ports "$SMARTDNS_PORT" > /dev/null 2>&1
 	done
 	
 }
 
-restart_dnsmasq()
+get_dnsmasq_cmd()
 {
-	CMD="`ps | grep "  dnsmasq" | grep -v grep`"
-	if [ -z "$CMD" ]; then
-		CMD="`ps ax | grep dnsmasq | grep -v grep`"
+	CMD="$(ps 2>/dev/null | grep -e '[a-zA-Z]\{0,2\} \{1,\}dnsmasq' | grep -v grep 2>/dev/null)"
+	if [ ! -z "$CMD" ]; then
+		return
 	fi
 
+	CMD="$(ps 2>/dev/null | grep '/usr/sbin/dnsmasq' | grep -v grep 2>/dev/null)"
+	if [ ! -z "$CMD" ]; then
+		return
+	fi
+
+	CMD="$(ps 2>/dev/null | grep 'dnsmasq' | grep -v grep 2>/dev/null)"
+	if [ ! -z "$CMD" ]; then
+		return
+	fi
+
+	CMD="$(ps ax 2>/dev/null | grep -e '[a-zA-Z]\{0,2\} \{1,\}dnsmasq' | grep -v grep 2>/dev/null)"
+	if [ ! -z "$CMD" ]; then
+		return
+	fi
+
+	CMD="$(ps ax 2>/dev/null | grep /usr/sbin/dnsmasq | grep -v grep 2>/dev/null)"
+	if [ ! -z "$CMD" ]; then
+		return
+	fi
+
+	CMD="$(ps ax 2>/dev/null | grep 'dnsmasq' | grep -v grep 2>/dev/null)"
+	if [ ! -z "$CMD" ]; then
+		return
+	fi	
+}
+
+restart_dnsmasq()
+{
+	local CMD=""
+
+	get_dnsmasq_cmd
 	if [ -z "$CMD" ]; then
 		echo "cannot find dnsmasq"
 		return 1
 	fi
 
-	PID=`echo "$CMD" | awk '{print $1}'`
+	PID="$(echo "$CMD" | awk '{print $1}')"
 	if [ ! -d "/proc/$PID" ]; then
 		echo "dnsmasq is not running"
 		return 1
 	fi
 
-	kill -9 $PID
+	kill -9 "$PID"
 
-	DNSMASQ_CMD="`echo $CMD | awk '{for(i=5; i<=NF;i++)printf \$i " "}'`"
+	DNSMASQ_CMD="$(echo "$CMD" | awk '{for(i=5; i<=NF;i++)printf $i " "}')"
 
 	$DNSMASQ_CMD
 }
 
 get_server_ip()
 {
-	IPS="`ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F: '{print $2}'`"
-	LOCAL_SERVER_IP=""
+	CONF_FILE=$1
+	IPS="$(ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F: '{print $2}')"
 	for IP in $IPS
 	do
 		N=3
 		while [ $N -gt 0 ]
 		do
-			ADDR=`echo $IP | awk -F. "{for(i=1;i<=$N;i++)printf \\$i\".\"}"`
-			grep "dhcp-range=" $DNSMASQ_CONF | grep $ADDR >/dev/null 2>&1
+			ADDR="$(echo "$IP" | awk -F. "{for(i=1;i<="$N";i++)printf \$i\".\"}")"
+			grep "dhcp-range=" "$CONF_FILE" | grep "$ADDR" >/dev/null 2>&1
 			if [ $? -eq 0 ]; then
-					SERVER_TAG="`grep "^dhcp-range *=" $DNSMASQ_CONF | grep $ADDR | awk -F= '{print $2}' | awk -F, '{print $1}'`"
+					SERVER_TAG="$(grep "^dhcp-range *=" "$CONF_FILE" | grep "$ADDR" | awk -F= '{print $2}' | awk -F, '{print $1}')"
 					LOCAL_SERVER_IP="$IP"
-					return 0
+					return 1
 			fi
-			N="`expr $N - 1`"
+			N=$((N-1))
 		done
 	done
 
 	return 1
 }
 
-set_dnsmasq()
+set_dnsmasq_conf()
 {
-	local RESTART_DNSMASQ=0
 	local LOCAL_SERVER_IP=""
 	local SERVER_TAG=""
-	get_server_ip
+	local CONF_FILE=$1
+
+	get_server_ip $CONF_FILE
+
 	if [ "$LOCAL_SERVER_IP" ] && [ "$SERVER_TAG" ]; then
-		grep "dhcp-option *=" $DNSMASQ_CONF | grep "$SERVER_TAG,6,$LOCAL_SERVER_IP" > /dev/null 2>&1
+		grep "dhcp-option *=" "$CONF_FILE" | grep "$SERVER_TAG,6,$LOCAL_SERVER_IP" > /dev/null 2>&1
 		if [ $? -ne 0 ]; then
-			sed -i "/^dhcp-option *=$SERVER_TAG,6,/d" $DNSMASQ_CONF
-			echo "dhcp-option=$SERVER_TAG,6,$LOCAL_SERVER_IP" >> $DNSMASQ_CONF
+			sed -i "/^dhcp-option *=$SERVER_TAG,6,/d" "$CONF_FILE"
+			echo "dhcp-option=$SERVER_TAG,6,$LOCAL_SERVER_IP" >> "$CONF_FILE"
 			RESTART_DNSMASQ=1
 		fi
 	fi
 
-	grep "^port *=0" $DNSMASQ_CONF > /dev/null 2>&1
+	grep "^port *=0" "$CONF_FILE" > /dev/null 2>&1
 	if [ $? -ne 0 ]; then
-		sed -i "/^port *=/d" $DNSMASQ_CONF
-		echo "port=0" >> $DNSMASQ_CONF
+		sed -i "/^port *=/d" "$CONF_FILE"
+		echo "port=0" >> "$CONF_FILE"
 		RESTART_DNSMASQ=1
 	fi
+}
 
+set_dnsmasq()
+{
+	local RESTART_DNSMASQ=0
+
+	for conf in $DNSMASQ_CONF
+	do
+		if [ ! -e "$conf" ]; then
+			continue
+		fi
+
+		set_dnsmasq_conf "$conf"
+	done
+	
 	if [ $RESTART_DNSMASQ -ne 0 ]; then
 		restart_dnsmasq	
 	fi
+}
 
+clear_dnsmasq_conf()
+{
+	local LOCAL_SERVER_IP=""
+	local SERVER_TAG=""
+	local CONF_FILE=$1
+	
+	get_server_ip "$CONF_FILE"
+	if [ "$LOCAL_SERVER_IP" ] && [ "$SERVER_TAG" ]; then
+		grep "dhcp-option *=" "$CONF_FILE" | grep "$SERVER_TAG,6,$LOCAL_SERVER_IP" > /dev/null 2>&1
+		if [ $? -eq 0 ]; then
+			sed -i "/^dhcp-option *=$SERVER_TAG,6,/d" "$CONF_FILE"
+			RESTART_DNSMASQ=1
+		fi
+	fi
+
+	grep "^port *=" "$CONF_FILE" > /dev/null 2>&1
+	if [ $? -eq 0 ]; then
+		sed -i "/^port *=/d" "$CONF_FILE"
+		RESTART_DNSMASQ=1
+	fi
 }
 
 clear_dnsmasq()
 {
 	local RESTART_DNSMASQ=0
-	local LOCAL_SERVER_IP=""
-	local SERVER_TAG=""
-	get_server_ip
-	if [ "$LOCAL_SERVER_IP" ] && [ "$SERVER_TAG" ]; then
-		grep "dhcp-option *=" $DNSMASQ_CONF | grep "$SERVER_TAG,6,$LOCAL_SERVER_IP" > /dev/null 2>&1
-		if [ $? -eq 0 ]; then
-			sed -i "/^dhcp-option *=$SERVER_TAG,6,/d" $DNSMASQ_CONF
-			RESTART_DNSMASQ=1
-		fi
-	fi
 
-	grep "^port *=" $DNSMASQ_CONF > /dev/null 2>&1
-	if [ $? -eq 0 ]; then
-		sed -i "/^port *=/d" $DNSMASQ_CONF
-		RESTART_DNSMASQ=1
-	fi
+	for conf in $DNSMASQ_CONF
+	do
+		if [ ! -e "$conf" ]; then
+			continue
+		fi
+
+		clear_dnsmasq_conf "$conf"
+	done
 
 	if [ $RESTART_DNSMASQ -ne 0 ]; then
 		restart_dnsmasq	
@@ -156,11 +232,11 @@ set_smartdns_port()
 	if [ "$SMARTDNS_WORKMODE" = "0" ]; then
 		return 0
 	elif [ "$SMARTDNS_WORKMODE" = "1" ]; then
-		sed -i "s/^\(bind .*\):53 *\(.*\)\$/\1:$SMARTDNS_PORT \2/g" $SMARTDNS_CONF
-    	sed -i "s/^\(bind-tcp .*\):53 *\(.*\)\$/\1:$SMARTDNS_PORT \2/g" $SMARTDNS_CONF
+		sed -i "s/^\\(bind .*\\):53 *\\(.*\\)\$/\\1:$SMARTDNS_PORT \\2/g" $SMARTDNS_CONF
+		sed -i "s/^\\(bind-tcp .*\\):53 *\\(.*\\)\$/\\1:$SMARTDNS_PORT \\2/g" $SMARTDNS_CONF
 	elif [ "$SMARTDNS_WORKMODE" = "2" ]; then
-		sed -i "s/^\(bind .*\):$SMARTDNS_PORT *\(.*\)\$/\1:53 \2/g" $SMARTDNS_CONF
-    	sed -i "s/^\(bind-tcp .*\):$SMARTDNS_PORT *\(.*\)\$/\1:53 \2/g" $SMARTDNS_CONF
+		sed -i "s/^\\(bind .*\\):$SMARTDNS_PORT *\\(.*\\)\$/\\1:53 \\2/g" $SMARTDNS_CONF
+		sed -i "s/^\\(bind-tcp .*\\):$SMARTDNS_PORT *\\(.*\\)\$/\\1:53 \\2/g" $SMARTDNS_CONF
 	else
 		return 1
 	fi	
@@ -198,6 +274,28 @@ clear_rule()
 	fi
 }
 
+get_tz()
+{
+	if [ -e "/etc/localtime" ]; then
+		return 
+	fi
+	
+	for tzfile in /etc/TZ /var/etc/TZ
+	do
+		if [ ! -e "$tzfile" ]; then
+			continue
+		fi
+		
+		tz="$(cat $tzfile 2>/dev/null)"
+	done
+	
+	if [ -z "$tz" ]; then
+		return	
+	fi
+	
+	export TZ=$tz
+}
+
 case "$1" in
 	start)
 	set_rule
@@ -206,13 +304,14 @@ case "$1" in
 	fi
 
 	set_smartdns_port
+	get_tz
 	$SMARTDNS_BIN -c $SMARTDNS_CONF -p $SMARTDNS_PID
 	if [ $? -ne 0 ]; then
 		clear_rule
 	fi
 	;;
 	status)
-	pid="`cat $SMARTDNS_PID |head -n 1 2>/dev/null`"
+	pid="$(cat $SMARTDNS_PID |head -n 1 2>/dev/null)"
 	if [ -z "$pid" ]; then
 		echo "smartdns not running."
 		return 0
@@ -227,7 +326,7 @@ case "$1" in
 	;;
 	stop)
 	clear_rule
-	pid="`cat $SMARTDNS_PID | head -n 1 2>/dev/null`"
+	pid="$(cat "$SMARTDNS_PID" | head -n 1 2>/dev/null)"
 	if [ -z "$pid" ]; then
 		echo "smartdns not running."
 		return 0
@@ -237,7 +336,7 @@ case "$1" in
 		return 0;
 	fi
 
-	kill -9 $pid 2>/dev/null
+	kill -9 "$pid" 2>/dev/null
 	;;
 	restart)
 	$0 stop

package/optware/control/postinst

@@ -1,4 +1,19 @@
-#! /bin/sh
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 chmod +x /opt/usr/sbin/smartdns
 chmod +x /opt/etc/init.d/S50smartdns

package/optware/control/prerm

@@ -1,3 +1,18 @@
-#! /bin/sh
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 /opt/etc/init.d/S50smartdns stop

package/optware/make.sh

@@ -1,5 +1,19 @@
-#/bin/sh
-
+#!/bin/sh
+#
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 CURR_DIR=$(cd $(dirname $0);pwd)
 VER="`date +"1.%Y.%m.%d-%H%M"`"
 SMARTDNS_DIR=$CURR_DIR/../../
@@ -13,44 +27,49 @@ showhelp()
 	echo "Options:"
 	echo " -o               output directory."
 	echo " --arch           archtecture."
-    echo " --ver            version."
+	echo " --ver            version."
 	echo " -h               show this message."
 }
 
 build()
 {
-    ROOT=/tmp/smartdns-optware
-    rm -fr $ROOT
+	ROOT=/tmp/smartdns-optware
+	rm -fr $ROOT
 
-    mkdir -p $ROOT
-    cp $CURR_DIR/* $ROOT/ -af
-    cd $ROOT/
-    mkdir $ROOT/opt/usr/sbin -p
-    mkdir $ROOT/opt/etc/init.d -p
-    mkdir $ROOT/opt/etc/smartdns/ -p
+	mkdir -p $ROOT
+	cp $CURR_DIR/* $ROOT/ -af
+	cd $ROOT/
+	mkdir $ROOT/opt/usr/sbin -p
+	mkdir $ROOT/opt/etc/init.d -p
+	mkdir $ROOT/opt/etc/smartdns/ -p
 
-    cp $SMARTDNS_CONF  $ROOT/opt/etc/smartdns/
-    cp $SMARTDNS_OPT $ROOT/opt/etc/smartdns/
-    cp $CURR_DIR/S50smartdns $ROOT/opt/etc/init.d/
-    cp $SMARTDNS_BIN $ROOT/opt/usr/sbin
+	cp $SMARTDNS_CONF  $ROOT/opt/etc/smartdns/
+	cp $SMARTDNS_OPT $ROOT/opt/etc/smartdns/
+	cp $CURR_DIR/S50smartdns $ROOT/opt/etc/init.d/
+	cp $SMARTDNS_BIN $ROOT/opt/usr/sbin
+	if [ $? -ne 0 ]; then
+		echo "copy smartdns file failed."
+		rm -fr $ROOT/
+		return 1
+	fi
 
-    sed -i "s/# *server-name smartdns/server-name smartdns/g" $ROOT/opt/etc/smartdns/smartdns.conf
-    sed -i "s/^Architecture.*/Architecture: $ARCH/g" $ROOT/control/control
-    sed -i "s/Version:.*/Version: $VER/" $ROOT/control/control
+	sed -i "s/# *server-name smartdns/server-name smartdns/g" $ROOT/opt/etc/smartdns/smartdns.conf
+	sed -i "s/^Architecture.*/Architecture: $ARCH/g" $ROOT/control/control
+	sed -i "s/Version:.*/Version: $VER/" $ROOT/control/control
 
-    cd $ROOT/control
-    chmod +x *
-    tar zcf ../control.tar.gz --owner=0 --group=0 ./ 
-    cd $ROOT
+	cd $ROOT/control
+	chmod +x *
+	tar zcf ../control.tar.gz --owner=0 --group=0 ./ 
+	cd $ROOT
 
-    tar zcf data.tar.gz --owner=0 --group=0 opt
-    tar zcf $OUTPUTDIR/smartdns.$VER.$ARCH.ipk --owner=0 --group=0 control.tar.gz data.tar.gz debian-binary
-    rm -fr $ROOT/
+	tar zcf data.tar.gz --owner=0 --group=0 opt
+	tar zcf $OUTPUTDIR/smartdns.$VER.$FILEARCH.ipk --owner=0 --group=0 control.tar.gz data.tar.gz debian-binary
+	rm -fr $ROOT/
 }
 
 main()
 {
-	OPTS=`getopt -o o:h --long arch:,ver: \
+	OPTS=`getopt -o o:h --long arch:,ver:,filearch: \
 		-n  "" -- "$@"`
 
 	if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
@@ -63,31 +82,38 @@ main()
 		--arch)
 			ARCH="$2"
 			shift 2;;
-        --ver)
-            VER="$2"
-            shift 2;;
+		--filearch)
+			FILEARCH="$2"
+			shift 2;;
+		--ver)
+			VER="$2"
+			shift 2;;
 		-o )
 			OUTPUTDIR="$2"
 			shift 2;;
-        -h | --help )
+		-h | --help )
 			showhelp
 			return 0
 			shift ;;
 		-- ) shift; break ;;
 		* ) break ;;
-  		esac
+		esac
 	done
 
-    if [ -z "$ARCH" ]; then
-        echo "please input arch."
-        return 1;
-    fi
+	if [ -z "$ARCH" ]; then
+		echo "please input arch."
+		return 1;
+	fi
 
-    if [ -z "$OUTPUTDIR" ]; then
-        OUTPUTDIR=$CURR_DIR;
-    fi
+	if [ -z "$FILEARCH" ]; then
+		FILEARCH=$ARCH
+	fi
 
-    build
+	if [ -z "$OUTPUTDIR" ]; then
+		OUTPUTDIR=$CURR_DIR;
+	fi
+
+	build
 }
 
 main $@

src/Makefile

@@ -1,20 +1,49 @@
-
-BIN=smartdns 
-OBJS_LIB=lib/rbtree.o lib/art.o lib/bitops.o lib/radix.o lib/conf.o
-OBJS=smartdns.o fast_ping.o dns_client.o dns_server.o dns.o util.o tlog.o dns_conf.o dns_cache.o $(OBJS_LIB)
-CFLAGS +=-O2 -g -Wall -Wstrict-prototypes -fno-omit-frame-pointer -Wstrict-aliasing 
-CFLAGS +=-Iinclude
-CFLAGS += -DBASE_FILE_NAME=\"$(notdir $<)\"
-CXXFLAGS=-O2 -g -Wall -std=c++11 
-CXXFLAGS +=-Iinclude
-LDFLAGS += -lpthread -lssl -lcrypto
-
-.PHONY: all
-
-all: $(BIN)
- 
-$(BIN) : $(OBJS)
-	$(CC) $(OBJS) -o $@ $(LDFLAGS)
-
-clean:
-	$(RM) $(OBJS) $(BIN)
+
+# Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+#
+# smartdns is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# smartdns is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+BIN=smartdns 
+OBJS_LIB=lib/rbtree.o lib/art.o lib/bitops.o lib/radix.o lib/conf.o
+OBJS=smartdns.o fast_ping.o dns_client.o dns_server.o dns.o util.o tlog.o dns_conf.o dns_cache.o http_parse.o $(OBJS_LIB)
+
+# cflags
+ifndef CFLAGS
+CFLAGS =-O2 -g -Wall -Wstrict-prototypes -fno-omit-frame-pointer -Wstrict-aliasing 
+endif
+override CFLAGS +=-Iinclude
+override CFLAGS += -DBASE_FILE_NAME=\"$(notdir $<)\"
+ifdef VER
+override CFLAGS += -DSMARTDNS_VERION=\"$(VER)\"
+endif
+
+CXXFLAGS=-O2 -g -Wall -std=c++11 
+override CXXFLAGS +=-Iinclude
+
+# ldflags
+ifeq ($(STATIC), yes)
+override LDFLAGS += -lssl -lcrypto -Wl,--whole-archive -lpthread -Wl,--no-whole-archive -ldl -static
+else
+override LDFLAGS += -lssl -lcrypto -lpthread 
+endif
+
+.PHONY: all clean
+
+all: $(BIN)
+ 
+$(BIN) : $(OBJS)
+	$(CC) $(OBJS) -o $@ $(LDFLAGS)
+
+clean:
+	$(RM) $(OBJS) $(BIN)

src/dns.h

@@ -1,11 +1,24 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef _DNS_HEAD_H
 #define _DNS_HEAD_H
 
-#include <arpa/inet.h>
-#include <linux/filter.h>
-#include <netdb.h>
-#include <stdint.h>
-
 #define DNS_RR_A_LEN 4
 #define DNS_RR_AAAA_LEN 16
 #define DNS_MAX_CNAME_LEN 256
@@ -31,7 +44,10 @@ typedef enum dns_rr_type {
 	DNS_RRS_END,
 } dns_rr_type;
 
-typedef enum dns_class { DNS_C_IN = 1, DNS_C_ANY = 255 } dns_class_t;
+typedef enum dns_class {
+	DNS_C_IN = 1, // DNS C IN
+	DNS_C_ANY = 255
+} dns_class_t;
 
 typedef enum dns_type {
 	DNS_T_A = 1,
@@ -51,7 +67,8 @@ typedef enum dns_type {
 } dns_type_t;
 
 typedef enum dns_opt_code {
-	DNS_OPT_T_ECS = 8,
+	DNS_OPT_T_ECS = 8, // OPT ECS
+	DNS_OPT_T_TCP_KEEPALIVE = 11,
 	DNS_OPT_T_ALL = 255
 } dns_opt_code_t;
 
@@ -93,7 +110,7 @@ struct dns_head {
 	unsigned short ancount; /* number of answer entries */
 	unsigned short nscount; /* number of authority entries */
 	unsigned short nrcount; /* number of addititional resource entries */
-} __attribute__((packed));
+} __attribute__((packed, aligned(2)));
 
 struct dns_rrs {
 	unsigned short next;
@@ -182,17 +199,25 @@ int dns_get_A(struct dns_rrs *rrs, char *domain, int maxsize, int *ttl, unsigned
 int dns_add_PTR(struct dns_packet *packet, dns_rr_type type, char *domain, int ttl, char *cname);
 int dns_get_PTR(struct dns_rrs *rrs, char *domain, int maxsize, int *ttl, char *cname, int cname_size);
 
-int dns_add_AAAA(struct dns_packet *packet, dns_rr_type type, char *domain, int ttl, unsigned char addr[DNS_RR_AAAA_LEN]);
+int dns_add_AAAA(struct dns_packet *packet, dns_rr_type type, char *domain, int ttl,
+				 unsigned char addr[DNS_RR_AAAA_LEN]);
 int dns_get_AAAA(struct dns_rrs *rrs, char *domain, int maxsize, int *ttl, unsigned char addr[DNS_RR_AAAA_LEN]);
 
 int dns_add_SOA(struct dns_packet *packet, dns_rr_type type, char *domain, int ttl, struct dns_soa *soa);
 int dns_get_SOA(struct dns_rrs *rrs, char *domain, int maxsize, int *ttl, struct dns_soa *soa);
 
+int dns_add_NS(struct dns_packet *packet, dns_rr_type type, char *domain, int ttl, char *cname);
+int dns_get_NS(struct dns_rrs *rrs, char *domain, int maxsize, int *ttl, char *cname, int cname_size);
+
 int dns_set_OPT_payload_size(struct dns_packet *packet, int payload_size);
 int dns_get_OPT_payload_size(struct dns_packet *packet);
 
 int dns_add_OPT_ECS(struct dns_packet *packet, struct dns_opt_ecs *ecs);
 int dns_get_OPT_ECS(struct dns_rrs *rrs, unsigned short *opt_code, unsigned short *opt_len, struct dns_opt_ecs *ecs);
+
+int dns_add_OPT_TCP_KEEYALIVE(struct dns_packet *packet, unsigned short timeout);
+int dns_get_OPT_TCP_KEEYALIVE(struct dns_rrs *rrs, unsigned short *opt_code, unsigned short *opt_len,
+							  unsigned short *timeout);
 /*
  * Packet operation
  */

src/dns_cache.c

@@ -1,329 +1,499 @@
-#include "dns_cache.h"
-#include "tlog.h"
-#include <pthread.h>
-
-struct dns_cache_head {
-	DECLARE_HASHTABLE(cache_hash, 10);
-	struct list_head cache_list;
-	int num;
-	int size;
-	pthread_mutex_t lock;
-};
-
-struct dns_cache_head dns_cache_head;
-
-int dns_cache_init(int size)
-{
-	INIT_LIST_HEAD(&dns_cache_head.cache_list);
-	hash_init(dns_cache_head.cache_hash);
-	dns_cache_head.num = 0;
-	dns_cache_head.size = size;
-
-	pthread_mutex_init(&dns_cache_head.lock, 0);
-
-	return 0;
-}
-
-struct dns_cache *_dns_cache_last(void)
-{
-	return list_last_entry(&dns_cache_head.cache_list, struct dns_cache, list);
-}
-
-struct dns_cache *_dns_cache_first(void)
-{
-	return list_first_entry_or_null(&dns_cache_head.cache_list, struct dns_cache, list);
-}
-
-void _dns_cache_delete(struct dns_cache *dns_cache)
-{
-	hash_del(&dns_cache->node);
-	list_del_init(&dns_cache->list);
-	dns_cache_head.num--;
-	free(dns_cache);
-}
-
-void dns_cache_get(struct dns_cache *dns_cache)
-{
-	if (atomic_inc_return(&dns_cache->ref) == 1) {
-		tlog(TLOG_ERROR, "BUG: dns_cache is invalid.");
-		return;
-	}
-}
-
-void dns_cache_release(struct dns_cache *dns_cache)
-{
-	if (!atomic_dec_and_test(&dns_cache->ref)) {
-		return;
-	}
-
-	_dns_cache_delete(dns_cache);
-}
-
-void _dns_cache_remove(struct dns_cache *dns_cache)
-{
-	hash_del(&dns_cache->node);
-	list_del_init(&dns_cache->list);
-	dns_cache_release(dns_cache);
-}
-
-int dns_cache_replace(char *domain, char *cname, int cname_ttl, int ttl, dns_type_t qtype, unsigned char *addr, int addr_len)
-{
-	struct dns_cache *dns_cache = NULL;
-
-	if (dns_cache_head.size <= 0) {
-		return 0;
-	}
-
-	dns_cache = dns_cache_lookup(domain, qtype);
-	if (dns_cache == NULL) {
-		return 0;
-	}
-
-	if (ttl < DNS_CACHE_TTL_MIN) {
-		ttl = DNS_CACHE_TTL_MIN;
-	}
-
-	pthread_mutex_lock(&dns_cache_head.lock);
-	dns_cache->ttl = ttl;
-	dns_cache->qtype = qtype;
-	dns_cache->ttl = ttl;
-	dns_cache->del_pending = 0;
-	time(&dns_cache->insert_time);
-	pthread_mutex_unlock(&dns_cache_head.lock);
-	if (qtype == DNS_T_A) {
-		if (addr_len != DNS_RR_A_LEN) {
-			goto errout;
-		}
-		memcpy(dns_cache->addr, addr, DNS_RR_A_LEN);
-	} else if (qtype == DNS_T_AAAA) {
-		if (addr_len != DNS_RR_AAAA_LEN) {
-			goto errout;
-		}
-		memcpy(dns_cache->addr, addr, DNS_RR_AAAA_LEN);
-	} else {
-		goto errout;
-	}
-
-	if (cname) {
-		strncpy(dns_cache->cname, cname, DNS_MAX_CNAME_LEN);
-		dns_cache->cname_ttl = cname_ttl;
-	}
-
-	dns_cache_release(dns_cache);
-	return 0;
-
-errout:
-	if (dns_cache) {
-		dns_cache_release(dns_cache);
-	}
-	return -1;
-}
-
-int dns_cache_insert(char *domain, char *cname, int cname_ttl, int ttl, dns_type_t qtype, unsigned char *addr, int addr_len)
-{
-	uint32_t key = 0;
-	struct dns_cache *dns_cache = NULL;
-
-	if (dns_cache_head.size <= 0) {
-		return 0;
-	}
-
-	dns_cache = dns_cache_lookup(domain, qtype);
-	if (dns_cache) {
-		dns_cache_delete(dns_cache);
-		dns_cache_release(dns_cache);
-		dns_cache = NULL;
-	}
-
-	dns_cache = malloc(sizeof(*dns_cache));
-	if (dns_cache == NULL) {
-		goto errout;
-	}
-
-	if (ttl < DNS_CACHE_TTL_MIN) {
-		ttl = DNS_CACHE_TTL_MIN;
-	}
-
-	key = hash_string(domain);
-	key = jhash(&qtype, sizeof(qtype), key);
-	strncpy(dns_cache->domain, domain, DNS_MAX_CNAME_LEN);
-	dns_cache->cname[0] = 0;
-	dns_cache->qtype = qtype;
-	dns_cache->ttl = ttl;
-	dns_cache->hitnum = 2;
-	dns_cache->del_pending = 0;
-	atomic_set(&dns_cache->ref, 1);
-	time(&dns_cache->insert_time);
-	if (qtype == DNS_T_A) {
-		if (addr_len != DNS_RR_A_LEN) {
-			goto errout;
-		}
-		memcpy(dns_cache->addr, addr, DNS_RR_A_LEN);
-	} else if (qtype == DNS_T_AAAA) {
-		if (addr_len != DNS_RR_AAAA_LEN) {
-			goto errout;
-		}
-		memcpy(dns_cache->addr, addr, DNS_RR_AAAA_LEN);
-	} else {
-		goto errout;
-	}
-
-	if (cname) {
-		strncpy(dns_cache->cname, cname, DNS_MAX_CNAME_LEN);
-		dns_cache->cname_ttl = cname_ttl;
-	}
-
-	pthread_mutex_lock(&dns_cache_head.lock);
-	hash_add(dns_cache_head.cache_hash, &dns_cache->node, key);
-	list_add_tail(&dns_cache->list, &dns_cache_head.cache_list);
-	INIT_LIST_HEAD(&dns_cache->check_list);
-
-	dns_cache_head.num++;
-	if (dns_cache_head.num > dns_cache_head.size) {
-		struct dns_cache *del_cache;
-		del_cache = _dns_cache_first();
-		if (del_cache) {
-			_dns_cache_remove(del_cache);
-		}
-	}
-	pthread_mutex_unlock(&dns_cache_head.lock);
-
-	return 0;
-errout:
-	if (dns_cache) {
-		free(dns_cache);
-	}
-
-	return -1;
-}
-
-struct dns_cache *dns_cache_lookup(char *domain, dns_type_t qtype)
-{
-	uint32_t key = 0;
-	struct dns_cache *dns_cache = NULL;
-	struct dns_cache *dns_cache_ret = NULL;
-	time_t now;
-
-	if (dns_cache_head.size <= 0) {
-		return NULL;
-	}
-
-	key = hash_string(domain);
-	key = jhash(&qtype, sizeof(qtype), key);
-
-	time(&now);
-	pthread_mutex_lock(&dns_cache_head.lock);
-	hash_for_each_possible(dns_cache_head.cache_hash, dns_cache, node, key)
-	{
-		if (dns_cache->qtype != qtype) {
-			continue;
-		}
-
-		if (strncmp(domain, dns_cache->domain, DNS_MAX_CNAME_LEN) != 0) {
-			continue;
-		}
-
-		dns_cache_ret = dns_cache;
-		break;
-	}
-
-	if (dns_cache_ret) {
-		if (now - dns_cache_ret->insert_time > dns_cache_ret->ttl) {
-			_dns_cache_remove(dns_cache_ret);
-			dns_cache_ret = NULL;
-		} else {
-			dns_cache_get(dns_cache_ret);
-		}
-	}
-
-	pthread_mutex_unlock(&dns_cache_head.lock);
-
-	return dns_cache_ret;
-}
-
-int dns_cache_get_ttl(struct dns_cache *dns_cache)
-{
-	time_t now;
-	int ttl = 0;
-	time(&now);
-
-	ttl = dns_cache->insert_time + dns_cache->ttl - now;
-	if (ttl < 0) {
-		return 0;
-	}
-
-	return ttl;
-}
-
-void dns_cache_delete(struct dns_cache *dns_cache)
-{
-	pthread_mutex_lock(&dns_cache_head.lock);
-	_dns_cache_remove(dns_cache);
-	pthread_mutex_unlock(&dns_cache_head.lock);
-}
-
-void dns_cache_update(struct dns_cache *dns_cache)
-{
-	pthread_mutex_lock(&dns_cache_head.lock);
-	if (!list_empty(&dns_cache->list)) {
-		list_del_init(&dns_cache->list);
-		list_add_tail(&dns_cache->list, &dns_cache_head.cache_list);
-		dns_cache->hitnum++;
-	}
-	pthread_mutex_unlock(&dns_cache_head.lock);
-}
-
-void dns_cache_invalidate(dns_cache_preinvalid_callback callback, int ttl_pre)
-{
-	struct dns_cache *dns_cache = NULL;
-	struct dns_cache *tmp;
-	time_t now;
-	int ttl = 0;
-	LIST_HEAD(checklist);
-
-	if (dns_cache_head.size <= 0) {
-		return;
-	}
-
-	time(&now);
-	pthread_mutex_lock(&dns_cache_head.lock);
-	list_for_each_entry_safe(dns_cache, tmp, &dns_cache_head.cache_list, list)
-	{
-		ttl = dns_cache->insert_time + dns_cache->ttl - now;
-		if (ttl > 0 && ttl < ttl_pre) {
-			if (callback && dns_cache->del_pending == 0) {
-				list_add_tail(&dns_cache->check_list, &checklist);
-				dns_cache_get(dns_cache);
-				dns_cache->del_pending = 1;
-				continue;
-			}
-		}
-
-		if (ttl < 0) {
-			_dns_cache_remove(dns_cache);
-		}
-	}
-	pthread_mutex_unlock(&dns_cache_head.lock);
-
-	list_for_each_entry_safe(dns_cache, tmp, &checklist, check_list)
-	{
-		if (callback) {
-			callback(dns_cache);
-		}
-		dns_cache_release(dns_cache);
-	}
-}
-
-void dns_cache_destroy(void)
-{
-	struct dns_cache *dns_cache = NULL;
-	struct dns_cache *tmp;
-	pthread_mutex_lock(&dns_cache_head.lock);
-	list_for_each_entry_safe(dns_cache, tmp, &dns_cache_head.cache_list, list)
-	{
-		_dns_cache_delete(dns_cache);
-	}
-	pthread_mutex_unlock(&dns_cache_head.lock);
-
-	pthread_mutex_destroy(&dns_cache_head.lock);
-}
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "dns_cache.h"
+#include "stringutil.h"
+#include "tlog.h"
+#include <pthread.h>
+
+#define DNS_CACHE_MAX_HITNUM 5000
+#define DNS_CACHE_HITNUM_STEP 2
+#define DNS_CACHE_HITNUM_STEP_MAX 6
+
+struct dns_cache_head {
+	DECLARE_HASHTABLE(cache_hash, 10);
+	struct list_head cache_list;
+	struct list_head inactive_list;
+	atomic_t num;
+	int size;
+	int enable_inactive;
+	int inactive_list_expired;
+	pthread_mutex_t lock;
+};
+
+static struct dns_cache_head dns_cache_head;
+
+int dns_cache_init(int size, int enable_inactive, int inactive_list_expired)
+{
+	INIT_LIST_HEAD(&dns_cache_head.cache_list);
+	INIT_LIST_HEAD(&dns_cache_head.inactive_list);
+	hash_init(dns_cache_head.cache_hash);
+	atomic_set(&dns_cache_head.num, 0);
+	dns_cache_head.size = size;
+	dns_cache_head.enable_inactive = enable_inactive;
+	dns_cache_head.inactive_list_expired = inactive_list_expired;
+
+	pthread_mutex_init(&dns_cache_head.lock, NULL);
+
+	return 0;
+}
+
+static __attribute__((unused)) struct dns_cache *_dns_cache_last(void)
+{
+	struct dns_cache *dns_cache = NULL;
+
+	dns_cache = list_last_entry(&dns_cache_head.inactive_list, struct dns_cache, list);
+	if (dns_cache) {
+		return dns_cache;
+	}
+
+	return list_last_entry(&dns_cache_head.cache_list, struct dns_cache, list);
+}
+
+static struct dns_cache *_dns_cache_first(void)
+{
+	struct dns_cache *dns_cache = NULL;
+
+	dns_cache = list_first_entry_or_null(&dns_cache_head.inactive_list, struct dns_cache, list);
+	if (dns_cache) {
+		return dns_cache;
+	}
+
+	return list_first_entry_or_null(&dns_cache_head.cache_list, struct dns_cache, list);
+}
+
+static void _dns_cache_delete(struct dns_cache *dns_cache)
+{
+	hash_del(&dns_cache->node);
+	list_del_init(&dns_cache->list);
+	atomic_dec(&dns_cache_head.num);
+	dns_cache_data_free(dns_cache->cache_data);
+	free(dns_cache);
+}
+
+void dns_cache_get(struct dns_cache *dns_cache)
+{
+	if (atomic_inc_return(&dns_cache->ref) == 1) {
+		tlog(TLOG_ERROR, "BUG: dns_cache is invalid.");
+		return;
+	}
+}
+
+void dns_cache_release(struct dns_cache *dns_cache)
+{
+	if (dns_cache == NULL) {
+		return;
+	}
+	if (!atomic_dec_and_test(&dns_cache->ref)) {
+		return;
+	}
+
+	_dns_cache_delete(dns_cache);
+}
+
+static void _dns_cache_remove(struct dns_cache *dns_cache)
+{
+	hash_del(&dns_cache->node);
+	list_del_init(&dns_cache->list);
+	dns_cache_release(dns_cache);
+}
+
+static void _dns_cache_move_inactive(struct dns_cache *dns_cache)
+{
+	list_del_init(&dns_cache->list);
+	list_add_tail(&dns_cache->list, &dns_cache_head.inactive_list);
+}
+
+enum CACHE_TYPE dns_cache_data_type(struct dns_cache_data *cache_data)
+{
+	return cache_data->head.cache_type;
+}
+
+uint32_t dns_cache_get_cache_flag(struct dns_cache_data *cache_data)
+{
+	return cache_data->head.cache_flag;
+}
+
+void dns_cache_data_free(struct dns_cache_data *data)
+{
+	if (data == NULL) {
+		return;
+	}
+
+	free(data);
+}
+
+struct dns_cache_data *dns_cache_new_data_addr(uint32_t cache_flag, char *cname, int cname_ttl, unsigned char *addr,
+											   int addr_len)
+{
+	struct dns_cache_addr *cache_addr = malloc(sizeof(struct dns_cache_addr));
+	memset(cache_addr, 0, sizeof(struct dns_cache_addr));
+	if (cache_addr == NULL) {
+		return NULL;
+	}
+
+	if (addr_len == DNS_RR_A_LEN) {
+		memcpy(cache_addr->addr_data.addr, addr, DNS_RR_A_LEN);
+	} else if (addr_len != DNS_RR_AAAA_LEN) {
+		memcpy(cache_addr->addr_data.addr, addr, DNS_RR_AAAA_LEN);
+	} else {
+		goto errout;
+	}
+
+	if (cname) {
+		safe_strncpy(cache_addr->addr_data.cname, cname, DNS_MAX_CNAME_LEN);
+		cache_addr->addr_data.cname_ttl = cname_ttl;
+	}
+
+	cache_addr->head.cache_flag = cache_flag;
+	cache_addr->head.cache_type = CACHE_TYPE_ADDR;
+	cache_addr->head.size = sizeof(struct dns_cache_addr) - sizeof(struct dns_cache_head);
+
+	return (struct dns_cache_data *)cache_addr;
+
+errout:
+	if (cache_addr) {
+		free(cache_addr);
+		cache_addr = NULL;
+	}
+
+	return NULL;
+}
+
+struct dns_cache_data *dns_cache_new_data_packet(uint32_t cache_flag, void *packet, size_t packet_len)
+{
+	struct dns_cache_packet *cache_packet = NULL;
+	size_t data_size = 0;
+	if (packet == NULL || packet_len <= 0) {
+		return NULL;
+	}
+
+	data_size = sizeof(*cache_packet) + packet_len;
+	cache_packet = malloc(data_size);
+	if (cache_packet == NULL) {
+		return NULL;
+	}
+
+	memcpy(cache_packet->data, packet, packet_len);
+
+	cache_packet->head.cache_flag = cache_flag;
+	cache_packet->head.cache_type = CACHE_TYPE_PACKET;
+	cache_packet->head.size = packet_len;
+
+	return (struct dns_cache_data *)cache_packet;
+}
+
+int dns_cache_replace(char *domain, int ttl, dns_type_t qtype, int speed, struct dns_cache_data *cache_data)
+{
+	struct dns_cache *dns_cache = NULL;
+	struct dns_cache_data *old_cache_data = NULL;
+
+	if (dns_cache_head.size <= 0) {
+		return 0;
+	}
+
+	/* lookup existing cache */
+	dns_cache = dns_cache_lookup(domain, qtype);
+	if (dns_cache == NULL) {
+		return dns_cache_insert(domain, ttl, qtype, speed, cache_data);
+	}
+
+	if (ttl < DNS_CACHE_TTL_MIN) {
+		ttl = DNS_CACHE_TTL_MIN;
+	}
+
+	/* update cache data */
+	pthread_mutex_lock(&dns_cache_head.lock);
+	dns_cache->ttl = ttl;
+	dns_cache->qtype = qtype;
+	dns_cache->ttl = ttl;
+	dns_cache->del_pending = 0;
+	dns_cache->speed = speed;
+	time(&dns_cache->insert_time);
+	old_cache_data = dns_cache->cache_data;
+	dns_cache->cache_data = cache_data;
+	list_del_init(&dns_cache->list);
+	list_add_tail(&dns_cache->list, &dns_cache_head.cache_list);
+	pthread_mutex_unlock(&dns_cache_head.lock);
+
+	dns_cache_data_free(old_cache_data);
+	dns_cache_release(dns_cache);
+	return 0;
+}
+
+int dns_cache_insert(char *domain, int ttl, dns_type_t qtype, int speed, struct dns_cache_data *cache_data)
+{
+	uint32_t key = 0;
+	struct dns_cache *dns_cache = NULL;
+
+	if (cache_data == NULL || domain == NULL) {
+		return -1;
+	}
+
+	if (dns_cache_head.size <= 0) {
+		return 0;
+	}
+
+	/* if cache already exists, free */
+	dns_cache = dns_cache_lookup(domain, qtype);
+	if (dns_cache) {
+		dns_cache_delete(dns_cache);
+		dns_cache_release(dns_cache);
+		dns_cache = NULL;
+	}
+
+	dns_cache = malloc(sizeof(*dns_cache));
+	if (dns_cache == NULL) {
+		goto errout;
+	}
+
+	if (ttl < DNS_CACHE_TTL_MIN) {
+		ttl = DNS_CACHE_TTL_MIN;
+	}
+
+	memset(dns_cache, 0, sizeof(*dns_cache));
+	key = hash_string(domain);
+	key = jhash(&qtype, sizeof(qtype), key);
+	safe_strncpy(dns_cache->domain, domain, DNS_MAX_CNAME_LEN);
+	atomic_set(&dns_cache->hitnum, 3);
+	atomic_set(&dns_cache->ref, 1);
+	dns_cache->qtype = qtype;
+	dns_cache->ttl = ttl;
+	dns_cache->hitnum_update_add = DNS_CACHE_HITNUM_STEP;
+	dns_cache->del_pending = 0;
+	dns_cache->speed = speed;
+	dns_cache->cache_data = cache_data;
+	time(&dns_cache->insert_time);
+	pthread_mutex_lock(&dns_cache_head.lock);
+	hash_add(dns_cache_head.cache_hash, &dns_cache->node, key);
+	list_add_tail(&dns_cache->list, &dns_cache_head.cache_list);
+	INIT_LIST_HEAD(&dns_cache->check_list);
+
+	/* Release extra cache, remove oldest cache record */
+	if (atomic_inc_return(&dns_cache_head.num) > dns_cache_head.size) {
+		struct dns_cache *del_cache;
+		del_cache = _dns_cache_first();
+		if (del_cache) {
+			_dns_cache_remove(del_cache);
+		}
+	}
+	pthread_mutex_unlock(&dns_cache_head.lock);
+
+	return 0;
+errout:
+	if (dns_cache) {
+		free(dns_cache);
+	}
+
+	return -1;
+}
+
+struct dns_cache *dns_cache_lookup(char *domain, dns_type_t qtype)
+{
+	uint32_t key = 0;
+	struct dns_cache *dns_cache = NULL;
+	struct dns_cache *dns_cache_ret = NULL;
+	time_t now;
+
+	if (dns_cache_head.size <= 0) {
+		return NULL;
+	}
+
+	key = hash_string(domain);
+	key = jhash(&qtype, sizeof(qtype), key);
+
+	time(&now);
+	/* find cache */
+	pthread_mutex_lock(&dns_cache_head.lock);
+	hash_for_each_possible(dns_cache_head.cache_hash, dns_cache, node, key)
+	{
+		if (dns_cache->qtype != qtype) {
+			continue;
+		}
+
+		if (strncmp(domain, dns_cache->domain, DNS_MAX_CNAME_LEN) != 0) {
+			continue;
+		}
+
+		dns_cache_ret = dns_cache;
+		break;
+	}
+
+	if (dns_cache_ret) {
+		/* Return NULL if the cache times out */
+		if (dns_cache_head.enable_inactive == 0 && (now - dns_cache_ret->insert_time > dns_cache_ret->ttl)) {
+			_dns_cache_remove(dns_cache_ret);
+			dns_cache_ret = NULL;
+		} else {
+			dns_cache_get(dns_cache_ret);
+		}
+	}
+
+	pthread_mutex_unlock(&dns_cache_head.lock);
+
+	return dns_cache_ret;
+}
+
+int dns_cache_get_ttl(struct dns_cache *dns_cache)
+{
+	time_t now;
+	int ttl = 0;
+	time(&now);
+
+	ttl = dns_cache->insert_time + dns_cache->ttl - now;
+	if (ttl < 0) {
+		return 0;
+	}
+
+	return ttl;
+}
+
+struct dns_cache_data *dns_cache_get_data(struct dns_cache *dns_cache)
+{
+	return dns_cache->cache_data;
+}
+
+void dns_cache_delete(struct dns_cache *dns_cache)
+{
+	pthread_mutex_lock(&dns_cache_head.lock);
+	_dns_cache_remove(dns_cache);
+	pthread_mutex_unlock(&dns_cache_head.lock);
+}
+
+int dns_cache_hitnum_dec_get(struct dns_cache *dns_cache)
+{
+	int hitnum = 0;
+	pthread_mutex_lock(&dns_cache_head.lock);
+	hitnum = atomic_dec_return(&dns_cache->hitnum);
+	if (dns_cache->hitnum_update_add > DNS_CACHE_HITNUM_STEP) {
+		dns_cache->hitnum_update_add--;
+	}
+	pthread_mutex_unlock(&dns_cache_head.lock);
+
+	return hitnum;
+}
+
+void dns_cache_update(struct dns_cache *dns_cache)
+{
+	pthread_mutex_lock(&dns_cache_head.lock);
+	if (!list_empty(&dns_cache->list)) {
+		list_del_init(&dns_cache->list);
+		list_add_tail(&dns_cache->list, &dns_cache_head.cache_list);
+		atomic_add(dns_cache->hitnum_update_add, &dns_cache->hitnum);
+		if (atomic_read(&dns_cache->hitnum) > DNS_CACHE_MAX_HITNUM) {
+			atomic_set(&dns_cache->hitnum, DNS_CACHE_MAX_HITNUM);
+		}
+
+		if (dns_cache->hitnum_update_add < DNS_CACHE_HITNUM_STEP_MAX) {
+			dns_cache->hitnum_update_add++;
+		}
+	}
+	pthread_mutex_unlock(&dns_cache_head.lock);
+}
+
+void _dns_cache_remove_expired_ttl(time_t *now)
+{
+	struct dns_cache *dns_cache = NULL;
+	struct dns_cache *tmp;
+	int ttl = 0;
+
+	list_for_each_entry_safe(dns_cache, tmp, &dns_cache_head.inactive_list, list)
+	{
+		ttl = dns_cache->insert_time + dns_cache->ttl - *now;
+		if (ttl > 0) {
+			continue;
+		}
+
+		if (dns_cache_head.inactive_list_expired + ttl > 0) {
+			continue;
+		}
+
+		_dns_cache_remove(dns_cache);
+	}
+}
+
+void dns_cache_invalidate(dns_cache_preinvalid_callback callback, int ttl_pre)
+{
+	struct dns_cache *dns_cache = NULL;
+	struct dns_cache *tmp;
+	time_t now;
+	int ttl = 0;
+	LIST_HEAD(checklist);
+
+	if (dns_cache_head.size <= 0) {
+		return;
+	}
+
+	time(&now);
+	pthread_mutex_lock(&dns_cache_head.lock);
+	list_for_each_entry_safe(dns_cache, tmp, &dns_cache_head.cache_list, list)
+	{
+		ttl = dns_cache->insert_time + dns_cache->ttl - now;
+		if (ttl > 0 && ttl < ttl_pre) {
+			/* If the TTL time is in the pre-timeout range, call callback function */
+			if (callback && dns_cache->del_pending == 0) {
+				list_add_tail(&dns_cache->check_list, &checklist);
+				dns_cache_get(dns_cache);
+				dns_cache->del_pending = 1;
+				continue;
+			}
+		}
+
+		if (ttl < 0) {
+			if (dns_cache_head.enable_inactive) {
+				_dns_cache_move_inactive(dns_cache);
+			} else {
+				_dns_cache_remove(dns_cache);
+			}
+		}
+	}
+
+	if (dns_cache_head.enable_inactive && dns_cache_head.inactive_list_expired != 0) {
+		_dns_cache_remove_expired_ttl(&now);
+	}
+
+	pthread_mutex_unlock(&dns_cache_head.lock);
+
+	list_for_each_entry_safe(dns_cache, tmp, &checklist, check_list)
+	{
+		/* run callback */
+		if (callback) {
+			callback(dns_cache);
+		}
+		dns_cache_release(dns_cache);
+	}
+}
+
+void dns_cache_destroy(void)
+{
+	struct dns_cache *dns_cache = NULL;
+	struct dns_cache *tmp;
+	pthread_mutex_lock(&dns_cache_head.lock);
+	list_for_each_entry_safe(dns_cache, tmp, &dns_cache_head.inactive_list, list)
+	{
+		_dns_cache_delete(dns_cache);
+	}
+
+	list_for_each_entry_safe(dns_cache, tmp, &dns_cache_head.cache_list, list)
+	{
+		_dns_cache_delete(dns_cache);
+	}
+	pthread_mutex_unlock(&dns_cache_head.lock);
+
+	pthread_mutex_destroy(&dns_cache_head.lock);
+}

src/dns_cache.h

@@ -1,57 +1,130 @@
-#ifndef _SMARTDNS_CACHE_H
-#define _SMARTDNS_CACHE_H
-
-#include "atomic.h"
-#include "dns.h"
-#include "hash.h"
-#include "hashtable.h"
-#include "list.h"
-#include <time.h>
-
-#define DNS_CACHE_TTL_MIN 30
-
-struct dns_cache {
-	struct hlist_node node;
-	struct list_head list;
-	struct list_head check_list;
-	atomic_t ref;
-	char domain[DNS_MAX_CNAME_LEN];
-	char cname[DNS_MAX_CNAME_LEN];
-	unsigned int cname_ttl;
-	unsigned int ttl;
-	int hitnum;
-	int del_pending;
-	time_t insert_time;
-	dns_type_t qtype;
-	union {
-		unsigned char ipv4_addr[DNS_RR_A_LEN];
-		unsigned char ipv6_addr[DNS_RR_AAAA_LEN];
-		unsigned char addr[0];
-	};
-};
-
-int dns_cache_init(int size);
-
-int dns_cache_replace(char *domain, char *cname, int cname_ttl, int ttl, dns_type_t qtype, unsigned char *addr, int addr_len);
-
-int dns_cache_insert(char *domain, char *cname, int cname_ttl, int ttl, dns_type_t qtype, unsigned char *addr, int addr_len);
-
-struct dns_cache *dns_cache_lookup(char *domain, dns_type_t qtype);
-
-void dns_cache_delete(struct dns_cache *dns_cache);
-
-void dns_cache_get(struct dns_cache *dns_cache);
-
-void dns_cache_release(struct dns_cache *dns_cache);
-
-void dns_cache_update(struct dns_cache *dns_cache);
-
-typedef void dns_cache_preinvalid_callback(struct dns_cache *dns_cache);
-
-void dns_cache_invalidate(dns_cache_preinvalid_callback callback, int ttl_pre);
-
-int dns_cache_get_ttl(struct dns_cache *dns_cache);
-
-void dns_cache_destroy(void);
-
-#endif // !_SMARTDNS_CACHE_H
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _SMARTDNS_CACHE_H
+#define _SMARTDNS_CACHE_H
+
+#include "atomic.h"
+#include "dns.h"
+#include "hash.h"
+#include "hashtable.h"
+#include "list.h"
+#include <stdlib.h>
+#include <time.h>
+
+#ifdef __cpluscplus
+extern "C" {
+#endif
+
+#define DNS_CACHE_TTL_MIN 30
+
+enum CACHE_TYPE {
+	CACHE_TYPE_NONE,
+	CACHE_TYPE_ADDR,
+	CACHE_TYPE_PACKET,
+};
+struct dns_cache_data_head {
+	uint32_t cache_flag;
+	enum CACHE_TYPE cache_type;
+	size_t size;
+};
+
+struct dns_cache_data {
+	struct dns_cache_data_head head;
+	unsigned char data[0];
+};
+
+struct dns_cache_addr {
+	struct dns_cache_data_head head;
+	struct dns_cache_addr_data {
+		unsigned int cname_ttl;
+		char cname[DNS_MAX_CNAME_LEN];
+		union {
+			unsigned char ipv4_addr[DNS_RR_A_LEN];
+			unsigned char ipv6_addr[DNS_RR_AAAA_LEN];
+			unsigned char addr[0];
+		};
+	} addr_data;
+};
+
+struct dns_cache_packet {
+	struct dns_cache_data_head head;
+	unsigned char data[0];
+};
+
+struct dns_cache {
+	struct hlist_node node;
+	struct list_head list;
+	struct list_head check_list;
+	
+	atomic_t ref;
+	atomic_t hitnum;
+
+	char domain[DNS_MAX_CNAME_LEN];
+	int ttl;
+	int speed;
+	int hitnum_update_add;
+	int del_pending;
+	time_t insert_time;
+	
+	dns_type_t qtype;
+	struct dns_cache_data *cache_data;
+};
+
+enum CACHE_TYPE dns_cache_data_type(struct dns_cache_data *cache_data);
+
+uint32_t dns_cache_get_cache_flag(struct dns_cache_data *cache_data);
+
+void dns_cache_data_free(struct dns_cache_data *data);
+
+struct dns_cache_data *dns_cache_new_data_addr(uint32_t cache_flag, char *cname, int cname_ttl, unsigned char *addr, int addr_len);
+
+struct dns_cache_data *dns_cache_new_data_packet(uint32_t cache_flag, void *packet, size_t packet_len);
+
+int dns_cache_init(int size, int enable_inactive, int inactive_list_expired);
+
+int dns_cache_replace(char *domain, int ttl, dns_type_t qtype, int speed, struct dns_cache_data *cache_data);
+
+int dns_cache_insert(char *domain, int ttl, dns_type_t qtype, int speed, struct dns_cache_data *cache_data);
+
+struct dns_cache *dns_cache_lookup(char *domain, dns_type_t qtype);
+
+void dns_cache_delete(struct dns_cache *dns_cache);
+
+void dns_cache_get(struct dns_cache *dns_cache);
+
+void dns_cache_release(struct dns_cache *dns_cache);
+
+int dns_cache_hitnum_dec_get(struct dns_cache *dns_cache);
+
+void dns_cache_update(struct dns_cache *dns_cache);
+
+typedef void dns_cache_preinvalid_callback(struct dns_cache *dns_cache);
+
+void dns_cache_invalidate(dns_cache_preinvalid_callback callback, int ttl_pre);
+
+int dns_cache_get_ttl(struct dns_cache *dns_cache);
+
+struct dns_cache_data *dns_cache_get_data(struct dns_cache *dns_cache);
+
+void dns_cache_destroy(void);
+
+#ifdef __cpluscplus
+}
+#endif
+#endif // !_SMARTDNS_CACHE_H

src/dns_client.h

@@ -1,8 +1,33 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef _SMART_DNS_CLIENT_H
 #define _SMART_DNS_CLIENT_H
 
 #include "dns.h"
 
+#ifdef __cpluscplus
+extern "C" {
+#endif
+
+#define DNS_SERVER_SPKI_LEN 64
+#define DNS_SERVER_GROUP_DEFAULT "default"
+
 typedef enum {
 	DNS_SERVER_UDP,
 	DNS_SERVER_TCP,
@@ -18,28 +43,78 @@ typedef enum dns_result_type {
 } dns_result_type;
 
 #define DNSSERVER_FLAG_BLACKLIST_IP (0x1 << 0)
-#define DNSSERVER_FLAG_CHECK_EDNS (0x1 << 1)
-#define DNSSERVER_FLAG_CHECK_TTL (0x1 << 2)
+#define DNSSERVER_FLAG_WHITELIST_IP (0x1 << 1)
+#define DNSSERVER_FLAG_CHECK_EDNS (0x1 << 2)
+#define DNSSERVER_FLAG_CHECK_TTL (0x1 << 3)
 
 int dns_client_init(void);
 
 int dns_client_set_ecs(char *ip, int subnet);
 
 /* query result notify function */
-typedef int (*dns_client_callback)(char *domain, dns_result_type rtype, unsigned int result_flag, struct dns_packet *packet, unsigned char *inpacket,
-								   int inpacket_len, void *user_ptr);
+typedef int (*dns_client_callback)(char *domain, dns_result_type rtype, unsigned int result_flag,
+								   struct dns_packet *packet, unsigned char *inpacket, int inpacket_len,
+								   void *user_ptr);
 
 /* query domain */
-int dns_client_query(char *domain, int qtype, dns_client_callback callback, void *user_ptr);
+int dns_client_query(char *domain, int qtype, dns_client_callback callback, void *user_ptr, const char *group_name);
 
 void dns_client_exit(void);
 
+struct client_dns_server_flag_udp {
+	int ttl;
+};
+
+struct client_dns_server_flag_tls {
+	char spki[DNS_SERVER_SPKI_LEN];
+	int spi_len;
+	char hostname[DNS_MAX_CNAME_LEN];
+	char tls_host_verify[DNS_MAX_CNAME_LEN];
+	char skip_check_cert;
+};
+
+struct client_dns_server_flag_https {
+	char spki[DNS_SERVER_SPKI_LEN];
+	int spi_len;
+	char hostname[DNS_MAX_CNAME_LEN];
+	char httphost[DNS_MAX_CNAME_LEN];
+	char path[DNS_MAX_CNAME_LEN];
+	char tls_host_verify[DNS_MAX_CNAME_LEN];
+	char skip_check_cert;
+};
+
+struct client_dns_server_flags {
+	dns_server_type_t type;
+	unsigned int server_flag;
+	unsigned int result_flag;
+
+	union {
+		struct client_dns_server_flag_udp udp;
+		struct client_dns_server_flag_tls tls;
+		struct client_dns_server_flag_https https;
+	};
+};
+
+int dns_client_spki_decode(const char *spki, unsigned char *spki_data_out);
+
 /* add remote dns server */
-int dns_add_server(char *server_ip, int port, dns_server_type_t server_type, int result_flag, int ttl);
+int dns_client_add_server(char *server_ip, int port, dns_server_type_t server_type,
+						  struct client_dns_server_flags *flags);
 
 /* remove remote dns server */
-int dns_remove_server(char *server_ip, int port, dns_server_type_t server_type);
+int dns_client_remove_server(char *server_ip, int port, dns_server_type_t server_type);
+
+int dns_client_add_group(char *group_name);
+
+int dns_client_add_to_group(char *group_name, char *server_ip, int port, dns_server_type_t server_type);
+
+int dns_client_remove_from_group(char *group_name, char *server_ip, int port, dns_server_type_t server_type);
+
+int dns_client_remove_group(char *group_name);
 
 int dns_server_num(void);
 
+#ifdef __cpluscplus
+}
+#endif
 #endif

src/dns_conf.h

@@ -1,147 +1,255 @@
-#ifndef _DNS_CONF
-#define _DNS_CONF
-
-#include "art.h"
-#include "conf.h"
-#include "dns.h"
-#include "dns_client.h"
-#include "hash.h"
-#include "hashtable.h"
-#include "list.h"
-#include "radix.h"
-
-#define DNS_MAX_SERVERS 64
-#define DNS_MAX_IPSET_NAMELEN 32
-#define DNS_MAX_IPLEN 64
-#define DNS_MAX_PATH 1024
-#define DEFAULT_DNS_PORT 53
-#define DEFAULT_DNS_TLS_PORT 853
-#define DNS_MAX_CONF_CNAME_LEN 128
-#define SMARTDNS_CONF_FILE "/etc/smartdns/smartdns.conf"
-#define SMARTDNS_LOG_FILE "/var/log/smartdns.log"
-#define SMARTDNS_AUDIT_FILE "/var/log/smartdns-audit.log"
-
-enum domain_rule {
-	DOMAIN_RULE_FLAGS = 0,
-	DOMAIN_RULE_ADDRESS_IPV4,
-	DOMAIN_RULE_ADDRESS_IPV6,
-	DOMAIN_RULE_IPSET,
-	DOMAIN_RULE_MAX,
-};
-
-#define DOMAIN_FLAG_ADDR_SOA      (1 << 0)
-#define DOMAIN_FLAG_ADDR_IPV4_SOA (1 << 1)
-#define DOMAIN_FLAG_ADDR_IPV6_SOA (1 << 2)
-#define DOMAIN_FLAG_ADDR_IGN      (1 << 3)
-#define DOMAIN_FLAG_ADDR_IPV4_IGN (1 << 4)
-#define DOMAIN_FLAG_ADDR_IPV6_IGN (1 << 5)
-#define DOMAIN_FLAG_IPSET_IGNORE  (1 << 6)
-
-struct dns_rule_flags {
-	unsigned int flags;
-};
-
-struct dns_address_IPV4 {
-	unsigned char ipv4_addr[DNS_RR_A_LEN];
-};
-
-struct dns_address_IPV6 {
-	unsigned char ipv6_addr[DNS_RR_AAAA_LEN];
-};
-
-struct dns_ipset_name {
-	struct hlist_node node;
-	char ipsetname[DNS_MAX_IPSET_NAMELEN];
-};
-
-struct dns_ipset_rule {
-	const char *ipsetname;
-};
-
-struct dns_domain_rule {
-	void *rules[DOMAIN_RULE_MAX];
-};
-
-struct dns_servers {
-	char server[DNS_MAX_IPLEN];
-	unsigned short port;
-	unsigned int result_flag;
-	int ttl;
-	dns_server_type_t type;
-};
-
-/* ip address lists of domain */
-struct dns_bogus_ip_address {
-	struct hlist_node node;
-	dns_type_t addr_type;
-	union {
-		unsigned char ipv4_addr[DNS_RR_A_LEN];
-		unsigned char ipv6_addr[DNS_RR_AAAA_LEN];
-		unsigned char addr[0];
-	};
-};
-
-enum address_rule {
-	ADDRESS_RULE_BLACKLIST = 1,
-	ADDRESS_RULE_BOGUS = 2,
-	ADDRESS_RULE_IP_IGNORE = 3,
-};
-
-struct dns_ip_address_rule {
-	unsigned int blacklist : 1;
-	unsigned int bogus : 1;
-	unsigned int ip_ignore : 1;
-};
-
-struct dns_edns_client_subnet {
-	int enable;
-	char ip[DNS_MAX_IPLEN];
-	int subnet;
-};
-
-struct dns_conf_address_rule {
-	radix_tree_t *ipv4;
-	radix_tree_t *ipv6;
-};
-
-extern char dns_conf_server_ip[DNS_MAX_IPLEN];
-extern char dns_conf_server_tcp_ip[DNS_MAX_IPLEN];
-extern int dns_conf_tcp_idle_time;
-extern int dns_conf_cachesize;
-extern int dns_conf_prefetch;
-extern struct dns_servers dns_conf_servers[DNS_MAX_SERVERS];
-extern int dns_conf_server_num;
-
-extern int dns_conf_log_level;
-extern char dns_conf_log_file[DNS_MAX_PATH];
-extern size_t dns_conf_log_size;
-extern int dns_conf_log_num;
-
-extern int dns_conf_audit_enable;
-extern char dns_conf_audit_file[DNS_MAX_PATH];
-extern size_t dns_conf_audit_size;
-extern int dns_conf_audit_num;
-
-extern char dns_conf_server_name[DNS_MAX_CONF_CNAME_LEN];
-extern art_tree dns_conf_domain_rule;
-extern struct dns_conf_address_rule dns_conf_address_rule;
-
-extern int dns_conf_dualstack_ip_selection;
-extern int dns_conf_dualstack_ip_selection_threshold;
-
-extern int dns_conf_rr_ttl;
-extern int dns_conf_rr_ttl_min;
-extern int dns_conf_rr_ttl_max;
-extern int dns_conf_force_AAAA_SOA;
-extern int dns_conf_ipset_timeout_enable;
-
-extern struct dns_edns_client_subnet dns_conf_ipv4_ecs;
-extern struct dns_edns_client_subnet dns_conf_ipv6_ecs;
-
-void dns_server_load_exit(void);
-
-int dns_server_load_conf(const char *file);
-
-extern int config_addtional_file(void *data, int argc, char *argv[]);
-
-#endif // !_DNS_CONF
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _DNS_CONF
+#define _DNS_CONF
+
+#include "art.h"
+#include "conf.h"
+#include "dns.h"
+#include "dns_client.h"
+#include "hash.h"
+#include "hashtable.h"
+#include "list.h"
+#include "radix.h"
+
+#ifdef __cpluscplus
+extern "C" {
+#endif
+
+#define DNS_MAX_BIND_IP 16
+#define DNS_MAX_SERVERS 64
+#define DNS_MAX_SERVER_NAME_LEN 128
+#define DNS_MAX_IPSET_NAMELEN 32
+#define DNS_GROUP_NAME_LEN 32
+#define DNS_NAX_GROUP_NUMBER 16
+#define DNS_MAX_IPLEN 64
+#define DNS_MAX_SPKI_LEN 64
+#define DNS_MAX_URL_LEN 256
+#define DNS_MAX_PATH 1024
+#define DEFAULT_DNS_PORT 53
+#define DEFAULT_DNS_TLS_PORT 853
+#define DEFAULT_DNS_HTTPS_PORT 443
+#define DNS_MAX_CONF_CNAME_LEN 256
+#define SMARTDNS_CONF_FILE "/etc/smartdns/smartdns.conf"
+#define SMARTDNS_LOG_FILE "/var/log/smartdns.log"
+#define SMARTDNS_AUDIT_FILE "/var/log/smartdns-audit.log"
+
+enum domain_rule {
+	DOMAIN_RULE_FLAGS = 0,
+	DOMAIN_RULE_ADDRESS_IPV4,
+	DOMAIN_RULE_ADDRESS_IPV6,
+	DOMAIN_RULE_IPSET,
+	DOMAIN_RULE_NAMESERVER,
+	DOMAIN_RULE_CHECKSPEED,
+	DOMAIN_RULE_MAX,
+};
+
+typedef enum {
+	DNS_BIND_TYPE_UDP,
+	DNS_BIND_TYPE_TCP,
+	DNS_BIND_TYPE_TLS,
+} DNS_BIND_TYPE;
+
+#define DOMAIN_CHECK_NONE 0
+#define DOMAIN_CHECK_ICMP 1
+#define DOMAIN_CHECK_TCP 2
+#define DOMAIN_CHECK_NUM 2
+
+#define DOMAIN_FLAG_ADDR_SOA (1 << 0)
+#define DOMAIN_FLAG_ADDR_IPV4_SOA (1 << 1)
+#define DOMAIN_FLAG_ADDR_IPV6_SOA (1 << 2)
+#define DOMAIN_FLAG_ADDR_IGN (1 << 3)
+#define DOMAIN_FLAG_ADDR_IPV4_IGN (1 << 4)
+#define DOMAIN_FLAG_ADDR_IPV6_IGN (1 << 5)
+#define DOMAIN_FLAG_IPSET_IGNORE (1 << 6)
+#define DOMAIN_FLAG_NAMESERVER_IGNORE (1 << 7)
+
+#define SERVER_FLAG_EXCLUDE_DEFAULT (1 << 0)
+
+#define BIND_FLAG_NO_RULE_ADDR (1 << 0)
+#define BIND_FLAG_NO_RULE_NAMESERVER (1 << 1)
+#define BIND_FLAG_NO_RULE_IPSET (1 << 2)
+#define BIND_FLAG_NO_RULE_SNIPROXY (1 << 3)
+#define BIND_FLAG_NO_RULE_SOA (1 << 4)
+#define BIND_FLAG_NO_SPEED_CHECK (1 << 5)
+#define BIND_FLAG_NO_CACHE (1 << 6)
+#define BIND_FLAG_NO_DUALSTACK_SELECTION (1 << 7)
+#define BIND_FLAG_FORCE_AAAA_SOA (1 << 8) 
+
+struct dns_rule_flags {
+	unsigned int flags;
+};
+
+struct dns_address_IPV4 {
+	unsigned char ipv4_addr[DNS_RR_A_LEN];
+};
+
+struct dns_address_IPV6 {
+	unsigned char ipv6_addr[DNS_RR_AAAA_LEN];
+};
+
+struct dns_ipset_name {
+	struct hlist_node node;
+	char ipsetname[DNS_MAX_IPSET_NAMELEN];
+};
+
+struct dns_ipset_rule {
+	const char *ipsetname;
+};
+
+struct dns_domain_rule {
+	void *rules[DOMAIN_RULE_MAX];
+};
+
+struct dns_nameserver_rule {
+	const char *group_name;
+};
+
+struct dns_server_groups {
+	struct hlist_node node;
+	char group_name[DNS_GROUP_NAME_LEN];
+	int server_num;
+	struct dns_servers *servers[DNS_MAX_SERVERS];
+};
+
+struct dns_domain_check_order {
+	char order[DOMAIN_CHECK_NUM];
+	unsigned short tcp_port;
+};
+
+struct dns_group_table {
+	DECLARE_HASHTABLE(group, 8);
+};
+extern struct dns_group_table dns_group_table;
+
+struct dns_servers {
+	char server[DNS_MAX_IPLEN];
+	unsigned short port;
+	unsigned int result_flag;
+	unsigned int server_flag;
+	int ttl;
+	dns_server_type_t type;
+	char skip_check_cert;
+	char spki[DNS_MAX_SPKI_LEN];
+	char hostname[DNS_MAX_CNAME_LEN];
+	char httphost[DNS_MAX_CNAME_LEN];
+	char tls_host_verify[DNS_MAX_CNAME_LEN];
+	char path[DNS_MAX_URL_LEN];
+};
+
+/* ip address lists of domain */
+struct dns_bogus_ip_address {
+	struct hlist_node node;
+	dns_type_t addr_type;
+	union {
+		unsigned char ipv4_addr[DNS_RR_A_LEN];
+		unsigned char ipv6_addr[DNS_RR_AAAA_LEN];
+		unsigned char addr[0];
+	};
+};
+
+enum address_rule {
+	ADDRESS_RULE_BLACKLIST = 1,
+	ADDRESS_RULE_WHITELIST = 2,
+	ADDRESS_RULE_BOGUS = 3,
+	ADDRESS_RULE_IP_IGNORE = 4,
+};
+
+struct dns_ip_address_rule {
+	unsigned int blacklist : 1;
+	unsigned int whitelist : 1;
+	unsigned int bogus : 1;
+	unsigned int ip_ignore : 1;
+};
+
+struct dns_edns_client_subnet {
+	int enable;
+	char ip[DNS_MAX_IPLEN];
+	int subnet;
+};
+
+struct dns_conf_address_rule {
+	radix_tree_t *ipv4;
+	radix_tree_t *ipv6;
+};
+
+struct dns_bind_ip {
+	DNS_BIND_TYPE type;
+	uint32_t flags;
+	char ip[DNS_MAX_IPLEN];
+	const char *group;
+};
+
+extern struct dns_bind_ip dns_conf_bind_ip[DNS_MAX_BIND_IP];
+extern int dns_conf_bind_ip_num;
+
+extern int dns_conf_tcp_idle_time;
+extern int dns_conf_cachesize;
+extern int dns_conf_prefetch;
+extern int dns_conf_serve_expired;
+extern int dns_conf_serve_expired_ttl;
+extern struct dns_servers dns_conf_servers[DNS_MAX_SERVERS];
+extern int dns_conf_server_num;
+
+extern int dns_conf_log_level;
+extern char dns_conf_log_file[DNS_MAX_PATH];
+extern size_t dns_conf_log_size;
+extern int dns_conf_log_num;
+
+extern char dns_conf_ca_file[DNS_MAX_PATH];
+extern char dns_conf_ca_path[DNS_MAX_PATH];
+
+extern struct dns_domain_check_order dns_conf_check_order;
+
+extern struct dns_server_groups dns_conf_server_groups[DNS_NAX_GROUP_NUMBER];
+extern int dns_conf_server_group_num;
+
+extern int dns_conf_audit_enable;
+extern int dns_conf_audit_log_SOA;
+extern char dns_conf_audit_file[DNS_MAX_PATH];
+extern size_t dns_conf_audit_size;
+extern int dns_conf_audit_num;
+
+extern char dns_conf_server_name[DNS_MAX_SERVER_NAME_LEN];
+extern art_tree dns_conf_domain_rule;
+extern struct dns_conf_address_rule dns_conf_address_rule;
+
+extern int dns_conf_dualstack_ip_selection;
+extern int dns_conf_dualstack_ip_selection_threshold;
+
+extern int dns_conf_rr_ttl;
+extern int dns_conf_rr_ttl_min;
+extern int dns_conf_rr_ttl_max;
+extern int dns_conf_force_AAAA_SOA;
+extern int dns_conf_ipset_timeout_enable;
+
+extern struct dns_edns_client_subnet dns_conf_ipv4_ecs;
+extern struct dns_edns_client_subnet dns_conf_ipv6_ecs;
+
+extern char dns_conf_sni_proxy_ip[DNS_MAX_IPLEN];
+
+void dns_server_load_exit(void);
+
+int dns_server_load_conf(const char *file);
+
+extern int config_addtional_file(void *data, int argc, char *argv[]);
+#ifdef __cpluscplus
+}
+#endif
+#endif // !_DNS_CONF

src/dns_server.h

@@ -1,12 +1,49 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef _SMART_DNS_SERVER_H
 #define _SMART_DNS_SERVER_H
 
+#include "dns.h"
+#include <stdint.h>
+
+#ifdef __cpluscplus
+extern "C" {
+#endif
+
 int dns_server_init(void);
 
 int dns_server_run(void);
 
+int dns_server_start(void);
+
 void dns_server_stop(void);
 
 void dns_server_exit(void);
 
+/* query result notify function */
+typedef int (*dns_result_callback)(char *domain, dns_rtcode_t rtcode, dns_type_t addr_type, char *ip,
+								   unsigned int ping_time, void *user_ptr);
+
+/* query domain */
+int dns_server_query(char *domain, int qtype, uint32_t server_flags, dns_result_callback callback, void *user_ptr);
+
+#ifdef __cpluscplus
+}
+#endif
 #endif

src/fast_ping.h

@@ -1,40 +1,60 @@
-#ifndef FAST_PING_H
-#define FAST_PING_H
-
-#include <netdb.h>
-#include <sys/time.h>
-#ifdef __cpluscplus
-extern "C" {
-#endif
-
-typedef enum {
-	PING_TYPE_ICMP = 1,
-	PING_TYPE_TCP = 2,
-	PING_TYPE_DNS = 3,
-} PING_TYPE;
-
-typedef enum {
-	PING_RESULT_RESPONSE = 1,
-	PING_RESULT_TIMEOUT = 2,
-	PING_RESULT_END = 3,
-} FAST_PING_RESULT;
-
-struct ping_host_struct;
-typedef void (*fast_ping_result)(struct ping_host_struct *ping_host, const char *host, FAST_PING_RESULT result, struct sockaddr *addr, socklen_t addr_len,
-								 int seqno, int ttl, struct timeval *tv, void *userptr);
-
-/* start ping */
-struct ping_host_struct *fast_ping_start(PING_TYPE type, const char *host, int count, int interval, int timeout, fast_ping_result ping_callback, void *userptr);
-
-/* stop ping */
-int fast_ping_stop(struct ping_host_struct *ping_host);
-
-int fast_ping_init(void);
-
-void fast_ping_exit(void);
-
-#ifdef __cpluscplus
-}
-#endif
-
-#endif // !FAST_PING_H
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef FAST_PING_H
+#define FAST_PING_H
+
+#include <netdb.h>
+#include <sys/time.h>
+#ifdef __cpluscplus
+extern "C" {
+#endif
+
+typedef enum {
+	PING_TYPE_ICMP = 1,
+	PING_TYPE_TCP = 2,
+	PING_TYPE_DNS = 3,
+} PING_TYPE;
+
+typedef enum {
+	PING_RESULT_RESPONSE = 1,
+	PING_RESULT_TIMEOUT = 2,
+	PING_RESULT_END = 3,
+} FAST_PING_RESULT;
+
+struct ping_host_struct;
+typedef void (*fast_ping_result)(struct ping_host_struct *ping_host, const char *host, FAST_PING_RESULT result,
+								 struct sockaddr *addr, socklen_t addr_len, int seqno, int ttl, struct timeval *tv,
+								 void *userptr);
+
+/* start ping */
+struct ping_host_struct *fast_ping_start(PING_TYPE type, const char *host, int count, int interval, int timeout,
+										 fast_ping_result ping_callback, void *userptr);
+
+/* stop ping */
+int fast_ping_stop(struct ping_host_struct *ping_host);
+
+int fast_ping_init(void);
+
+void fast_ping_exit(void);
+
+#ifdef __cpluscplus
+}
+#endif
+
+#endif // !FAST_PING_H

src/http_parse.c

@@ -0,0 +1,462 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "http_parse.h"
+#include "hash.h"
+#include "hashtable.h"
+#include "util.h"
+#include "jhash.h"
+#include "list.h"
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+struct http_head_fields {
+	struct hlist_node node;
+	struct list_head list;
+
+	char *name;
+	char *value;
+};
+
+struct http_head {
+	HTTP_HEAD_TYPE head_type;
+	HTTP_METHOD method;
+	char *url;
+	char *version;
+	int code;
+	char *code_msg;
+	int buff_size;
+	int buff_len;
+	char *buff;
+	int head_ok;
+	int head_len;
+	char *data;
+	int data_len;
+	int expect_data_len;
+	struct http_head_fields field_head;
+	DECLARE_HASHTABLE(field_map, 4);
+};
+
+/*
+ * Returns:
+ *  >=0  - success http data len
+ *  -1   - Incomplete request
+ *  -2   - parse failed
+ */
+struct http_head *http_head_init(int buffsize)
+{
+	struct http_head *http_head = NULL;
+	char *buffer = NULL;
+
+	http_head = malloc(sizeof(*http_head));
+	if (http_head == NULL) {
+		goto errout;
+	}
+	memset(http_head, 0, sizeof(*http_head));
+	INIT_LIST_HEAD(&http_head->field_head.list);
+	hash_init(http_head->field_map);
+
+	buffer = malloc(buffsize);
+	if (buffer == NULL) {
+		goto errout;
+	}
+
+	http_head->buff = buffer;
+	http_head->buff_size = buffsize;
+
+	return http_head;
+
+errout:
+	if (buffer) {
+		free(buffer);
+	}
+
+	if (http_head) {
+		free(http_head);
+	}
+
+	return NULL;
+}
+
+struct http_head_fields *http_head_first_fields(struct http_head *http_head)
+{
+	struct http_head_fields *first = NULL;
+	first = list_first_entry(&http_head->field_head.list, struct http_head_fields, list);
+
+	if (first->name == NULL && first->value == NULL) {
+		return NULL;
+	}
+
+	return first;
+}
+
+const char *http_head_get_fields_value(struct http_head *http_head, const char *name)
+{
+	unsigned long key;
+	struct http_head_fields *filed;
+
+	key = hash_string(name);
+	hash_for_each_possible(http_head->field_map, filed, node, key)
+	{
+		if (strncmp(filed->name, name, 128) == 0) {
+			return filed->value;
+		}
+	}
+
+	return NULL;
+}
+
+struct http_head_fields *http_head_next_fields(struct http_head_fields *fields)
+{
+	struct http_head_fields *next = NULL;
+	next = list_next_entry(fields, list);
+
+	if (next->name == NULL && next->value == NULL) {
+		return NULL;
+	}
+
+	return next;
+}
+
+int http_head_lookup_fields(struct http_head_fields *fields, const char **name, const char **value)
+{
+	if (fields == NULL) {
+		return -1;
+	}
+
+	if (name) {
+		*name = fields->name;
+	}
+
+	if (value) {
+		*value = fields->value;
+	}
+
+	return 0;
+}
+
+HTTP_METHOD http_head_get_method(struct http_head *http_head)
+{
+	return http_head->method;
+}
+
+const char *http_head_get_url(struct http_head *http_head)
+{
+	return http_head->url;
+}
+
+const char *http_head_get_httpversion(struct http_head *http_head)
+{
+	return http_head->version;
+}
+
+int http_head_get_httpcode(struct http_head *http_head)
+{
+	return http_head->code;
+}
+
+char *http_head_get_httpcode_msg(struct http_head *http_head)
+{
+	return http_head->code_msg;
+}
+
+HTTP_HEAD_TYPE http_head_get_head_type(struct http_head *http_head)
+{
+	return http_head->head_type;
+}
+
+char *http_head_get_data(struct http_head *http_head)
+{
+	return http_head->data;
+}
+
+int http_head_get_data_len(struct http_head *http_head)
+{
+	return http_head->data_len;
+}
+
+static int _http_head_add_fields(struct http_head *http_head, char *name, char *value)
+{
+	unsigned long key = 0;
+	struct http_head_fields *fields = NULL;
+	fields = malloc(sizeof(*fields));
+	if (fields == NULL) {
+		return -1;
+	}
+	memset(fields, 0, sizeof(*fields));
+
+	fields->name = name;
+	fields->value = value;
+
+	list_add_tail(&fields->list, &http_head->field_head.list);
+	key = hash_string(name);
+	hash_add(http_head->field_map, &fields->node, key);
+
+	return 0;
+}
+
+static int _http_head_parse_response(struct http_head *http_head, char *key, char *value)
+{
+	char *field_start = NULL;
+	char *tmp_ptr = NULL;
+	char *ret_msg = NULL;
+	char *ret_code = NULL;
+
+	if (strstr(key, "HTTP/") == NULL) {
+		return -1;
+	}
+
+	for (tmp_ptr = value; *tmp_ptr != 0; tmp_ptr++) {
+		if (field_start == NULL) {
+			field_start = tmp_ptr;
+		}
+
+		if (*tmp_ptr != ' ') {
+			continue;
+		}
+		
+		*tmp_ptr = '\0';
+		ret_code = field_start;
+		ret_msg = tmp_ptr + 1;
+		field_start = NULL;
+		break;
+	}
+
+	if (ret_code == NULL || ret_msg == NULL) {
+		return -1;
+	}
+
+	if (is_numeric(ret_code) != 0) {
+		return -1;
+	}
+
+	http_head->code = atol(ret_code);
+	http_head->code_msg = ret_msg;
+	http_head->version = key;
+	http_head->head_type = HTTP_HEAD_RESPONSE;
+
+	return 0;
+}
+
+static int _http_head_parse_request(struct http_head *http_head, char *key, char *value)
+{
+	int method = HTTP_METHOD_INVALID;
+	char *url = NULL;
+	char *version = NULL;
+	char *tmp_ptr = value;
+	char *field_start = NULL;
+
+	if (strncmp(key, "GET", sizeof("GET")) == 0) {
+		method = HTTP_METHOD_GET;
+	} else if (strncmp(key, "POST", sizeof("POST")) == 0) {
+		method = HTTP_METHOD_POST;
+	} else if (strncmp(key, "PUT", sizeof("PUT")) == 0) {
+		method = HTTP_METHOD_PUT;
+	} else if (strncmp(key, "DELETE", sizeof("DELETE")) == 0) {
+		method = HTTP_METHOD_DELETE;
+	} else if (strncmp(key, "TRACE", sizeof("TRACE")) == 0) {
+		method = HTTP_METHOD_TRACE;
+	} else if (strncmp(key, "CONNECT", sizeof("CONNECT")) == 0) {
+		method = HTTP_METHOD_CONNECT;
+	} else {
+		return _http_head_parse_response(http_head, key, value);
+	}
+
+	for (tmp_ptr = value; *tmp_ptr != 0; tmp_ptr++) {
+		if (field_start == NULL) {
+			field_start = tmp_ptr;
+		}
+		if (*tmp_ptr == ' ') {
+			*tmp_ptr = '\0';
+			if (url == NULL) {
+				url = field_start;
+			}
+
+			field_start = NULL;
+		}
+	}
+
+	if (field_start && version == NULL) {
+		version = field_start;
+	}
+
+	http_head->method = method;
+	http_head->url = url;
+	http_head->version = version;
+	http_head->head_type = HTTP_HEAD_REQUEST;
+
+	return 0;
+}
+
+static int _http_head_parse(struct http_head *http_head)
+{
+	int i = 0;
+	char *key = NULL;
+	char *value = NULL;
+	char *data;
+	int has_first_line = 0;
+
+	int inkey = 1;
+	int invalue = 0;
+
+	data = http_head->buff;
+	for (i = 0; i < http_head->head_len; i++, data++) {
+		if (inkey) {
+			if (key == NULL && *data != ' ' && *data != '\r' && *data != '\n') {
+				key = data;
+				continue;
+			}
+
+			if (*data == ':' || *data == ' ') {
+				*data = '\0';
+				inkey = 0;
+				invalue = 1;
+				continue;
+			}
+		}
+
+		if (invalue) {
+			if (value == NULL && *data != ' ') {
+				value = data;
+				continue;
+			}
+
+			if (*data == '\r' || *data == '\n') {
+				*data = '\0';
+				inkey = 1;
+				invalue = 0;
+			}
+		}
+
+		if (key && value && invalue == 0) {
+			if (has_first_line == 0) {
+				if (_http_head_parse_request(http_head, key, value) != 0) {
+					return -2;
+				}
+
+				has_first_line = 1;
+			} else {
+				if (_http_head_add_fields(http_head, key, value) != 0) {
+					return -2;
+				}
+			}
+
+			key = NULL;
+			value = NULL;
+			inkey = 1;
+			invalue = 0;
+		}
+	}
+
+	return 0;
+}
+
+int http_head_parse(struct http_head *http_head, const char *data, int data_len)
+{
+	int i = 0;
+	char *buff_end = NULL;
+	int left_size = 0;
+	int process_data_len = 0;
+
+	left_size = http_head->buff_size - http_head->buff_len;
+
+	if (left_size < data_len) {
+		return -3;
+	}
+
+	buff_end = http_head->buff + http_head->buff_len;
+	if (http_head->head_ok == 0) {
+		for (i = 0; i < data_len; i++, data++) {
+			*(buff_end + i) = *data;
+			if (*data == '\n') {
+				if (http_head->buff_len + i < 2) {
+					continue;
+				}
+
+				if (*(buff_end + i - 2) == '\n') {
+					http_head->head_ok = 1;
+					http_head->head_len = http_head->buff_len + i - 2;
+					i++;
+					buff_end += i;
+					data_len -= i;
+					data++;
+					if (_http_head_parse(http_head) != 0) {
+						return -2;
+					}
+
+					const char *content_len = NULL;
+					content_len = http_head_get_fields_value(http_head, "Content-Length");
+					if (content_len) {
+						http_head->expect_data_len = atol(content_len);
+					} else {
+						http_head->expect_data_len = 0;
+					}
+
+					if (http_head->expect_data_len < 0) {
+						return -2;
+					}
+
+					break;
+				}
+			}
+		}
+
+		process_data_len += i;
+		if (http_head->head_ok == 0) {
+			// Read data again */
+			http_head->buff_len += process_data_len;
+			return -1;
+		}
+	}
+
+	if (http_head->head_ok == 1) {
+		int get_data_len = (http_head->expect_data_len > data_len) ? data_len : http_head->expect_data_len;
+		if (http_head->data == NULL) {
+			http_head->data = buff_end;
+		}
+
+		memcpy(buff_end, data, get_data_len);
+		process_data_len += get_data_len;
+		http_head->data_len += get_data_len;
+	}
+
+	http_head->buff_len += process_data_len;
+	if (http_head->data_len < http_head->expect_data_len) {
+		return -1;
+	}
+
+	return process_data_len;
+}
+
+void http_head_destroy(struct http_head *http_head)
+{
+	struct http_head_fields *fields, *tmp;
+
+	list_for_each_entry_safe(fields, tmp, &http_head->field_head.list, list)
+	{
+		list_del(&fields->list);
+		free(fields);
+	}
+
+	if (http_head->buff) {
+		free(http_head->buff);
+	}
+
+	free(http_head);
+}

src/http_parse.h

@@ -0,0 +1,87 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef HTTP_PARSER_H
+#define HTTP_PARSER_H
+
+#ifdef __cpluscplus
+extern "C" {
+#endif
+
+struct http_head;
+struct http_head_fields;
+
+typedef enum HTTP_METHOD {
+	HTTP_METHOD_INVALID = 0,
+	HTTP_METHOD_GET,
+	HTTP_METHOD_HEAD,
+	HTTP_METHOD_POST,
+	HTTP_METHOD_PUT,
+	HTTP_METHOD_DELETE,
+	HTTP_METHOD_TRACE,
+	HTTP_METHOD_CONNECT,
+} HTTP_METHOD;
+
+typedef enum HTTP_HEAD_TYPE {
+	HTTP_HEAD_INVALID = 0,
+	HTTP_HEAD_REQUEST = 1,
+	HTTP_HEAD_RESPONSE = 2,
+} HTTP_HEAD_TYPE;
+
+struct http_head *http_head_init(int buffsize);
+
+HTTP_HEAD_TYPE http_head_get_head_type(struct http_head *http_head);
+
+HTTP_METHOD http_head_get_method(struct http_head *http_head);
+
+const char *http_head_get_url(struct http_head *http_head);
+
+const char *http_head_get_httpversion(struct http_head *http_head);
+
+int http_head_get_httpcode(struct http_head *http_head);
+
+char *http_head_get_httpcode_msg(struct http_head *http_head);
+
+char *http_head_get_data(struct http_head *http_head);
+
+int http_head_get_data_len(struct http_head *http_head);
+
+struct http_head_fields *http_head_first_fields(struct http_head *http_head);
+
+struct http_head_fields *http_head_next_fields(struct http_head_fields *fields);
+
+const char *http_head_get_fields_value(struct http_head *http_head, const char *name);
+
+int http_head_lookup_fields(struct http_head_fields *fields, const char **name, const char **value);
+
+/*
+ * Returns:
+ *  >=0  - success http data len
+ *  -1   - Incomplete request
+ *  -2   - parse failed
+ *  -3   - buffer is small
+ */
+int http_head_parse(struct http_head *http_head, const char *data, int data_len);
+
+void http_head_destroy(struct http_head *http_head);
+
+#ifdef __cpluscplus
+}
+#endif
+
+#endif // !HTTP_PARSER_H

src/include/art.h

@@ -1,240 +1,251 @@
-/*
-Copyright (c) 2012, Armon Dadgar
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in the
-      documentation and/or other materials provided with the distribution.
-    * Neither the name of the organization nor the
-      names of its contributors may be used to endorse or promote products
-      derived from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL ARMON DADGAR BE LIABLE FOR ANY
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-#include <stdint.h>
-#ifndef ART_H
-#define ART_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define NODE4   1
-#define NODE16  2
-#define NODE48  3
-#define NODE256 4
-
-#define MAX_PREFIX_LEN 10
-
-#if defined(__GNUC__) && !defined(__clang__)
-# if __STDC_VERSION__ >= 199901L && 402 == (__GNUC__ * 100 + __GNUC_MINOR__)
-/*
- * GCC 4.2.2's C99 inline keyword support is pretty broken; avoid. Introduced in
- * GCC 4.2.something, fixed in 4.3.0. So checking for specific major.minor of
- * 4.2 is fine.
- */
-#  define BROKEN_GCC_C99_INLINE
-# endif
-#endif
-
-typedef int(*art_callback)(void *data, const unsigned char *key, uint32_t key_len, void *value);
-
-/**
- * This struct is included as part
- * of all the various node sizes
- */
-typedef struct {
-    uint8_t type;
-    uint8_t num_children;
-    uint32_t partial_len;
-    unsigned char partial[MAX_PREFIX_LEN];
-} art_node;
-
-/**
- * Small node with only 4 children
- */
-typedef struct {
-    art_node n;
-    unsigned char keys[4];
-    art_node *children[4];
-} art_node4;
-
-/**
- * Node with 16 children
- */
-typedef struct {
-    art_node n;
-    unsigned char keys[16];
-    art_node *children[16];
-} art_node16;
-
-/**
- * Node with 48 children, but
- * a full 256 byte field.
- */
-typedef struct {
-    art_node n;
-    unsigned char keys[256];
-    art_node *children[48];
-} art_node48;
-
-/**
- * Full node with 256 children
- */
-typedef struct {
-    art_node n;
-    art_node *children[256];
-} art_node256;
-
-/**
- * Represents a leaf. These are
- * of arbitrary size, as they include the key.
- */
-typedef struct {
-    void *value;
-    uint32_t key_len;
-    unsigned char key[0];
-} art_leaf;
-
-/**
- * Main struct, points to root.
- */
-typedef struct {
-    art_node *root;
-    uint64_t size;
-} art_tree;
-
-/**
- * Initializes an ART tree
- * @return 0 on success.
- */
-int art_tree_init(art_tree *t);
-
-/**
- * DEPRECATED
- * Initializes an ART tree
- * @return 0 on success.
- */
-#define init_art_tree(...) art_tree_init(__VA_ARGS__)
-
-/**
- * Destroys an ART tree
- * @return 0 on success.
- */
-int art_tree_destroy(art_tree *t);
-
-/**
- * DEPRECATED
- * Initializes an ART tree
- * @return 0 on success.
- */
-#define destroy_art_tree(...) art_tree_destroy(__VA_ARGS__)
-
-/**
- * Returns the size of the ART tree.
- */
-#ifdef BROKEN_GCC_C99_INLINE
-# define art_size(t) ((t)->size)
-#else
-static inline uint64_t art_size(art_tree *t) {
-    return t->size;
-}
-#endif
-
-/**
- * Inserts a new value into the ART tree
- * @arg t The tree
- * @arg key The key
- * @arg key_len The length of the key
- * @arg value Opaque value.
- * @return NULL if the item was newly inserted, otherwise
- * the old value pointer is returned.
- */
-void* art_insert(art_tree *t, const unsigned char *key, int key_len, void *value);
-
-/**
- * Deletes a value from the ART tree
- * @arg t The tree
- * @arg key The key
- * @arg key_len The length of the key
- * @return NULL if the item was not found, otherwise
- * the value pointer is returned.
- */
-void* art_delete(art_tree *t, const unsigned char *key, int key_len);
-
-/**
- * Searches for a value in the ART tree
- * @arg t The tree
- * @arg key The key
- * @arg key_len The length of the key
- * @return NULL if the item was not found, otherwise
- * the value pointer is returned.
- */
-void* art_search(const art_tree *t, const unsigned char *key, int key_len);
-
-/**
- * Searches substring for a value in the ART tree
- * @arg t The tree
- * @arg str The key
- * @arg str_len The length of the key
- * @return NULL if the item was not found, otherwise
- * the value pointer is returned.
- */
-void *art_substring(const art_tree *t, const unsigned char *str, int str_len, unsigned char *key, int *key_len);
-
-/**
- * Returns the minimum valued leaf
- * @return The minimum leaf or NULL
- */
-art_leaf* art_minimum(art_tree *t);
-
-/**
- * Returns the maximum valued leaf
- * @return The maximum leaf or NULL
- */
-art_leaf* art_maximum(art_tree *t);
-
-/**
- * Iterates through the entries pairs in the map,
- * invoking a callback for each. The call back gets a
- * key, value for each and returns an integer stop value.
- * If the callback returns non-zero, then the iteration stops.
- * @arg t The tree to iterate over
- * @arg cb The callback function to invoke
- * @arg data Opaque handle passed to the callback
- * @return 0 on success, or the return of the callback.
- */
-int art_iter(art_tree *t, art_callback cb, void *data);
-
-/**
- * Iterates through the entries pairs in the map,
- * invoking a callback for each that matches a given prefix.
- * The call back gets a key, value for each and returns an integer stop value.
- * If the callback returns non-zero, then the iteration stops.
- * @arg t The tree to iterate over
- * @arg prefix The prefix of keys to read
- * @arg prefix_len The length of the prefix
- * @arg cb The callback function to invoke
- * @arg data Opaque handle passed to the callback
- * @return 0 on success, or the return of the callback.
- */
-int art_iter_prefix(art_tree *t, const unsigned char *prefix, int prefix_len, art_callback cb, void *data);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
+/*
+Copyright (c) 2012, Armon Dadgar
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the organization nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL ARMON DADGAR BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#include <stdint.h>
+#ifndef ART_H
+#define ART_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define NODE4   1
+#define NODE16  2
+#define NODE48  3
+#define NODE256 4
+
+#define MAX_PREFIX_LEN 10
+
+#if defined(__GNUC__) && !defined(__clang__)
+# if __STDC_VERSION__ >= 199901L && 402 == (__GNUC__ * 100 + __GNUC_MINOR__)
+/*
+ * GCC 4.2.2's C99 inline keyword support is pretty broken; avoid. Introduced in
+ * GCC 4.2.something, fixed in 4.3.0. So checking for specific major.minor of
+ * 4.2 is fine.
+ */
+#  define BROKEN_GCC_C99_INLINE
+# endif
+#endif
+
+typedef int(*art_callback)(void *data, const unsigned char *key, uint32_t key_len, void *value);
+
+/**
+ * This struct is included as part
+ * of all the various node sizes
+ */
+typedef struct {
+    uint8_t type;
+    uint8_t num_children;
+    uint32_t partial_len;
+    unsigned char partial[MAX_PREFIX_LEN];
+} art_node;
+
+/**
+ * Small node with only 4 children
+ */
+typedef struct {
+    art_node n;
+    unsigned char keys[4];
+    art_node *children[4];
+} art_node4;
+
+/**
+ * Node with 16 children
+ */
+typedef struct {
+    art_node n;
+    unsigned char keys[16];
+    art_node *children[16];
+} art_node16;
+
+/**
+ * Node with 48 children, but
+ * a full 256 byte field.
+ */
+typedef struct {
+    art_node n;
+    unsigned char keys[256];
+    art_node *children[48];
+} art_node48;
+
+/**
+ * Full node with 256 children
+ */
+typedef struct {
+    art_node n;
+    art_node *children[256];
+} art_node256;
+
+/**
+ * Represents a leaf. These are
+ * of arbitrary size, as they include the key.
+ */
+typedef struct {
+    void *value;
+    uint32_t key_len;
+    unsigned char key[0];
+} art_leaf;
+
+/**
+ * Main struct, points to root.
+ */
+typedef struct {
+    art_node *root;
+    uint64_t size;
+} art_tree;
+
+/**
+ * Initializes an ART tree
+ * @return 0 on success.
+ */
+int art_tree_init(art_tree *t);
+
+/**
+ * DEPRECATED
+ * Initializes an ART tree
+ * @return 0 on success.
+ */
+#define init_art_tree(...) art_tree_init(__VA_ARGS__)
+
+/**
+ * Destroys an ART tree
+ * @return 0 on success.
+ */
+int art_tree_destroy(art_tree *t);
+
+/**
+ * DEPRECATED
+ * Initializes an ART tree
+ * @return 0 on success.
+ */
+#define destroy_art_tree(...) art_tree_destroy(__VA_ARGS__)
+
+/**
+ * Returns the size of the ART tree.
+ */
+#ifdef BROKEN_GCC_C99_INLINE
+# define art_size(t) ((t)->size)
+#else
+static inline uint64_t art_size(art_tree *t) {
+    return t->size;
+}
+#endif
+
+/**
+ * Inserts a new value into the ART tree
+ * @arg t The tree
+ * @arg key The key
+ * @arg key_len The length of the key
+ * @arg value Opaque value.
+ * @return NULL if the item was newly inserted, otherwise
+ * the old value pointer is returned.
+ */
+void* art_insert(art_tree *t, const unsigned char *key, int key_len, void *value);
+
+/**
+ * Deletes a value from the ART tree
+ * @arg t The tree
+ * @arg key The key
+ * @arg key_len The length of the key
+ * @return NULL if the item was not found, otherwise
+ * the value pointer is returned.
+ */
+void* art_delete(art_tree *t, const unsigned char *key, int key_len);
+
+/**
+ * Searches for a value in the ART tree
+ * @arg t The tree
+ * @arg key The key
+ * @arg key_len The length of the key
+ * @return NULL if the item was not found, otherwise
+ * the value pointer is returned.
+ */
+void* art_search(const art_tree *t, const unsigned char *key, int key_len);
+
+/**
+ * Searches substring for a value in the ART tree
+ * @arg t The tree
+ * @arg str The key
+ * @arg str_len The length of the key
+ * @return NULL if the item was not found, otherwise
+ * the value pointer is returned.
+ */
+void *art_substring(const art_tree *t, const unsigned char *str, int str_len, unsigned char *key, int *key_len);
+
+/**
+ * Wakk substring for a value in the ART tree
+ * @arg t The tree
+ * @arg str The key
+ * @arg str_len The length of the key
+ * @return NULL if the item was not found, otherwise
+ * the value pointer is returned.
+ */
+typedef int (*walk_func)(unsigned char *key, uint32_t key_len, void *value, void *arg);
+void art_substring_walk(const art_tree *t, const unsigned char *str, int str_len, walk_func func, void *arg);
+
+/**
+ * Returns the minimum valued leaf
+ * @return The minimum leaf or NULL
+ */
+art_leaf* art_minimum(art_tree *t);
+
+/**
+ * Returns the maximum valued leaf
+ * @return The maximum leaf or NULL
+ */
+art_leaf* art_maximum(art_tree *t);
+
+/**
+ * Iterates through the entries pairs in the map,
+ * invoking a callback for each. The call back gets a
+ * key, value for each and returns an integer stop value.
+ * If the callback returns non-zero, then the iteration stops.
+ * @arg t The tree to iterate over
+ * @arg cb The callback function to invoke
+ * @arg data Opaque handle passed to the callback
+ * @return 0 on success, or the return of the callback.
+ */
+int art_iter(art_tree *t, art_callback cb, void *data);
+
+/**
+ * Iterates through the entries pairs in the map,
+ * invoking a callback for each that matches a given prefix.
+ * The call back gets a key, value for each and returns an integer stop value.
+ * If the callback returns non-zero, then the iteration stops.
+ * @arg t The tree to iterate over
+ * @arg prefix The prefix of keys to read
+ * @arg prefix_len The length of the prefix
+ * @arg cb The callback function to invoke
+ * @arg data Opaque handle passed to the callback
+ * @return 0 on success, or the return of the callback.
+ */
+int art_iter_prefix(art_tree *t, const unsigned char *prefix, int prefix_len, art_callback cb, void *data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/include/atomic.h

@@ -1,17 +1,30 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 #ifndef _GENERIC_ATOMIC_H
 #define _GENERIC_ATOMIC_H
 
-
-/* Check GCC version, just to be safe */
-#if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC_MINOR__ < 1)
-# error atomic.h works only with GCC newer than version 4.1
-#endif /* GNUC >= 4.1 */
-
 /**
  * Atomic type.
  */
 typedef struct {
-	volatile int counter;
+	int counter;
 } atomic_t;
 
 #define ATOMIC_INIT(i)  { (i) }
@@ -154,3 +167,4 @@ static inline int atomic_add_negative( int i, atomic_t *v )
 }
 
 #endif
+

src/include/bitmap.h

@@ -1,3 +1,22 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 #ifndef _PERF_BITOPS_H
 #define _PERF_BITOPS_H
 
@@ -130,4 +149,4 @@ static inline int bitmap_and(unsigned long *dst, const unsigned long *src1,
 	return __bitmap_and(dst, src1, src2, nbits);
 }
 
-#endif /* _PERF_BITOPS_H */
+#endif /* _PERF_BITOPS_H */

src/include/bitops.h

@@ -1,3 +1,22 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 #ifndef _GENERIC_BITOPS_H_
 #define _GENERIC_BITOPS_H_
 
@@ -197,4 +216,4 @@ static inline uint32_t rol32(uint32_t word, unsigned int shift)
 	return (word << shift) | (word >> ((-shift) & 31));
 }
 
-#endif
+#endif

src/include/conf.h

@@ -1,121 +1,141 @@
-#ifndef _GENERIC_CONF_H
-#define _GENERIC_CONF_H
-
-#include <unistd.h>
-
-#define MAX_LINE_LEN 1024
-#define MAX_KEY_LEN 64
-#define CONF_INT_MAX (~(1 << 31))
-#define CONF_INT_MIN (1 << 31)
-
-#define CONF_RET_OK     0
-#define CONF_RET_ERR   -1
-#define CONF_RET_WARN  -2
-#define CONF_RET_NOENT -3
-
-struct config_item {
-	const char *item;
-	int (*item_func)(const char *item, void *data, int argc, char *argv[]);
-	void *data;
-};
-
-struct config_item_custom {
-	void *custom_data;
-	int (*custom_func)(void *data, int argc, char *argv[]);
-};
-
-struct config_item_int {
-	int *data;
-	int min;
-	int max;
-};
-
-struct config_item_string {
-	char *data;
-	size_t size;
-};
-
-struct config_item_yesno {
-	int *data;
-};
-
-struct config_item_size {
-	size_t *data;
-	size_t min;
-	size_t max;
-};
-
-#define CONF_INT(key, value, min_value, max_value)                                                                                                             \
-	{                                                                                                                                                          \
-		key, conf_int, &(struct config_item_int)                                                                                                               \
-		{                                                                                                                                                      \
-			.data = value, .min = min_value, .max = max_value                                                                                                  \
-		}                                                                                                                                                      \
-	}
-#define CONF_STRING(key, value, len_value)                                                                                                                     \
-	{                                                                                                                                                          \
-		key, conf_string, &(struct config_item_string)                                                                                                         \
-		{                                                                                                                                                      \
-			.data = value, .size = len_value                                                                                                                   \
-		}                                                                                                                                                      \
-	}
-#define CONF_YESNO(key, value)                                                                                                                                 \
-	{                                                                                                                                                          \
-		key, conf_yesno, &(struct config_item_yesno)                                                                                                           \
-		{                                                                                                                                                      \
-			.data = value                                                                                                                                      \
-		}                                                                                                                                                      \
-	}
-#define CONF_SIZE(key, value, min_value, max_value)                                                                                                            \
-	{                                                                                                                                                          \
-		key, conf_size, &(struct config_item_size)                                                                                                             \
-		{                                                                                                                                                      \
-			.data = value, .min = min_value, .max = max_value                                                                                                  \
-		}                                                                                                                                                      \
-	}
-/*
- * func: int (*func)(void *data, int argc, char *argv[]);
- */
-#define CONF_CUSTOM(key, func, data)                                                                                                                           \
-	{                                                                                                                                                          \
-		key, conf_custom, &(struct config_item_custom)                                                                                                         \
-		{                                                                                                                                                      \
-			.custom_data = data, .custom_func = func                                                                                                           \
-		}                                                                                                                                                      \
-	}
-
-#define CONF_END()                                                                                                                                             \
-	{                                                                                                                                                          \
-		0, 0, 0                                                                                                                                                \
-	}
-
-extern int conf_custom(const char *item, void *data, int argc, char *argv[]);
-
-extern int conf_int(const char *item, void *data, int argc, char *argv[]);
-
-extern int conf_string(const char *item, void *data, int argc, char *argv[]);
-
-extern int conf_yesno(const char *item, void *data, int argc, char *argv[]);
-
-extern int conf_size(const char *item, void *data, int argc, char *argv[]);
-
-/*
- * Example:
- *  int num = 0;
- *
- *  struct config_item itmes [] = {
- *       CONF_INT("CONF_NUM", &num, -1, 10),
- *       CONF_END();
- *  }
- *
- *  load_conf(file, items);
- *
- */
-
-typedef int(conf_error_handler)(const char *file, int lineno, int ret);
-
-int load_conf(const char *file, struct config_item items[], conf_error_handler handler);
-
-void load_exit(void);
-
-#endif // !_GENERIC_CONF_H
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _GENERIC_CONF_H
+#define _GENERIC_CONF_H
+
+#include <unistd.h>
+
+#define MAX_LINE_LEN 1024
+#define MAX_KEY_LEN 64
+#define CONF_INT_MAX (~(1 << 31))
+#define CONF_INT_MIN (1 << 31)
+
+#define CONF_RET_OK 0
+#define CONF_RET_ERR -1
+#define CONF_RET_WARN -2
+#define CONF_RET_NOENT -3
+
+struct config_item {
+	const char *item;
+	int (*item_func)(const char *item, void *data, int argc, char *argv[]);
+	void *data;
+};
+
+struct config_item_custom {
+	void *custom_data;
+	int (*custom_func)(void *data, int argc, char *argv[]);
+};
+
+struct config_item_int {
+	int *data;
+	int min;
+	int max;
+};
+
+struct config_item_string {
+	char *data;
+	size_t size;
+};
+
+struct config_item_yesno {
+	int *data;
+};
+
+struct config_item_size {
+	size_t *data;
+	size_t min;
+	size_t max;
+};
+
+#define CONF_INT(key, value, min_value, max_value)                                                                     \
+	{                                                                                                                  \
+		key, conf_int, &(struct config_item_int)                                                                       \
+		{                                                                                                              \
+			.data = value, .min = min_value, .max = max_value                                                          \
+		}                                                                                                              \
+	}
+#define CONF_STRING(key, value, len_value)                                                                             \
+	{                                                                                                                  \
+		key, conf_string, &(struct config_item_string)                                                                 \
+		{                                                                                                              \
+			.data = value, .size = len_value                                                                           \
+		}                                                                                                              \
+	}
+#define CONF_YESNO(key, value)                                                                                         \
+	{                                                                                                                  \
+		key, conf_yesno, &(struct config_item_yesno)                                                                   \
+		{                                                                                                              \
+			.data = value                                                                                              \
+		}                                                                                                              \
+	}
+#define CONF_SIZE(key, value, min_value, max_value)                                                                    \
+	{                                                                                                                  \
+		key, conf_size, &(struct config_item_size)                                                                     \
+		{                                                                                                              \
+			.data = value, .min = min_value, .max = max_value                                                          \
+		}                                                                                                              \
+	}
+/*
+ * func: int (*func)(void *data, int argc, char *argv[]);
+ */
+#define CONF_CUSTOM(key, func, data)                                                                                   \
+	{                                                                                                                  \
+		key, conf_custom, &(struct config_item_custom)                                                                 \
+		{                                                                                                              \
+			.custom_data = data, .custom_func = func                                                                   \
+		}                                                                                                              \
+	}
+
+#define CONF_END()                                                                                                     \
+	{                                                                                                                  \
+		NULL, NULL, NULL                                                                                               \
+	}
+
+extern int conf_custom(const char *item, void *data, int argc, char *argv[]);
+
+extern int conf_int(const char *item, void *data, int argc, char *argv[]);
+
+extern int conf_string(const char *item, void *data, int argc, char *argv[]);
+
+extern int conf_yesno(const char *item, void *data, int argc, char *argv[]);
+
+extern int conf_size(const char *item, void *data, int argc, char *argv[]);
+
+/*
+ * Example:
+ *  int num = 0;
+ *
+ *  struct config_item itmes [] = {
+ *       CONF_INT("CONF_NUM", &num, -1, 10),
+ *       CONF_END();
+ *  }
+ *
+ *  load_conf(file, items);
+ *
+ */
+
+typedef int(conf_error_handler)(const char *file, int lineno, int ret);
+
+int load_conf(const char *file, struct config_item items[], conf_error_handler handler);
+
+void load_exit(void);
+
+const char *conf_get_conf_file(void);
+
+#endif // !_GENERIC_CONF_H

src/include/findbit.h

@@ -1,5 +1,24 @@
-#ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_
-#define _TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef _TOOLS_GENERIC_BITOPS_FIND_H_
+#define _TOOLS_GENERIC_BITOPS_FIND_H_
 
 #ifndef find_next_bit
 /**
@@ -74,4 +93,4 @@ extern unsigned long find_first_bit(const unsigned long *addr,
 unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size);
 #endif
 
-#endif /*_TOOLS_LINUX_ASM_GENERIC_BITOPS_FIND_H_ */
+#endif /*_TOOLS_GENERIC_BITOPS_FIND_H_ */

src/include/gcc_builtin.h

@@ -1,3 +1,22 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 #ifndef _TOOLS_LINUX_COMPILER_H_
 #define _TOOLS_LINUX_COMPILER_H_
 
@@ -114,4 +133,4 @@
 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
 #define round_down(x, y) ((x) & ~__round_mask(x, y))
 
-#endif /* _TOOLS_LINUX_COMPILER_H */
+#endif /* _TOOLS_LINUX_COMPILER_H */

src/include/hash.h

@@ -1,3 +1,22 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 #ifndef _GENERIC_HASH_H
 #define _GENERIC_HASH_H
 
@@ -210,4 +229,4 @@ hash_string(const char *str)
 	return(v);
 }
 
-#endif /* _GENERIC_HASH_H */
+#endif /* _GENERIC_HASH_H */

src/include/hashtable.h

@@ -1,6 +1,19 @@
-/*
- * Statically sized hash table implementation
- * (C) 2012  Sasha Levin <levinsasha928@gmail.com>
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #ifndef _GENERIC_HASHTABLE_H
@@ -147,4 +160,4 @@ static inline void hash_del(struct hlist_node *node)
 	hlist_for_each_entry_safe(obj, tmp,\
 		&name[hash_min(key, HASH_BITS(name))], member)
 
-#endif
+#endif

src/include/jhash.h

@@ -1,3 +1,21 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef _JHASH_H
 #define _JHASH_H
 
@@ -181,4 +199,4 @@ static inline uint32_t jhash_1word(uint32_t a, uint32_t initval)
 	return __jhash_nwords(a, 0, 0, initval + JHASH_INITVAL + (1 << 2));
 }
 
-#endif /* _JHASH_H */
+#endif /* _JHASH_H */

src/include/list.h

@@ -1,3 +1,20 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #ifndef _GENERIC_LIST_H
 #define _GENERIC_LIST_H
@@ -789,4 +806,4 @@ static inline void list_del_range(struct list_head *begin,
 #define list_for_each_from(pos, head) \
 	for (; pos != (head); pos = pos->next)
 
-#endif /* _GENERIC_LIST_H */
+#endif /* _GENERIC_LIST_H */

src/include/radix.h

@@ -1,161 +1,162 @@
-/*
- * Copyright (c) 1999-2000
- * 
- * The Regents of the University of Michigan ("The Regents") and
- * Merit Network, Inc. All rights reserved.  Redistribution and use
- * in source and binary forms, with or without modification, are
- * permitted provided that the following conditions are met:
- * 
- * 1. Redistributions of source code must retain the above 
- * copyright notice, this list of conditions and the 
- * following disclaimer.
- * 
- * 2. Redistributions in binary form must reproduce the above 
- * copyright notice, this list of conditions and the 
- * following disclaimer in the documentation and/or other 
- * materials provided with the distribution.
- * 
- * 3. All advertising materials mentioning features or use of 
- * this software must display the following acknowledgement:
- * 
- *   This product includes software developed by the University of
- *   Michigan, Merit Network, Inc., and their contributors.
- * 
- * 4. Neither the name of the University, Merit Network, nor the
- * names of their contributors may be used to endorse or 
- * promote products derived from this software without 
- * specific prior written permission.
- * 
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL TH E REGENTS
- * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HO WEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-/*
- * Portions Copyright (c) 2004,2005 Damien Miller <djm@mindrot.org>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-/* $Id: radix.h,v 1.9 2007/10/24 06:03:08 djm Exp $ */
-
-#ifndef _RADIX_H
-#define _RADIX_H
-
-#if defined(_MSC_VER)
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#else
-# include <sys/types.h>
-# include <sys/socket.h>
-# include <netinet/in.h>
-# include <arpa/inet.h>
-# include <netdb.h>
-#endif
-
-#if defined(_MSC_VER)
-# define snprintf _snprintf
-typedef unsigned __int8		u_int8_t;
-typedef unsigned __int16	u_int16_t;
-typedef unsigned __int32	u_int32_t;
-const char *inet_ntop(int af, const void *src, char *dst, size_t size);
-size_t strlcpy(char *dst, const char *src, size_t size);
-#endif
-
-/*
- * Originally from MRT include/mrt.h
- * $MRTId: mrt.h,v 1.1.1.1 2000/08/14 18:46:10 labovit Exp $
- */
-typedef struct _prefix_t {
-	u_int family;			/* AF_INET | AF_INET6 */
-	u_int bitlen;			/* same as mask? */
-	int ref_count;			/* reference count */
-	union {
-		struct in_addr sin;
-		struct in6_addr sin6;
-	} add;
-} prefix_t;
-
-void Deref_Prefix(prefix_t *prefix);
-
-/*
- * Originally from MRT include/radix.h
- * $MRTId: radix.h,v 1.1.1.1 2000/08/14 18:46:10 labovit Exp $
- */
-typedef struct _radix_node_t {
-	u_int bit;			/* flag if this node used */
-	prefix_t *prefix;		/* who we are in radix tree */
-	struct _radix_node_t *l, *r;	/* left and right children */
-	struct _radix_node_t *parent;	/* may be used */
-	void *data;			/* pointer to data */
-} radix_node_t;
-
-typedef struct _radix_tree_t {
-	radix_node_t *head;
-	u_int maxbits;			/* for IP, 32 bit addresses */
-	int num_active_node;		/* for debug purpose */
-} radix_tree_t;
-
-/* Type of callback function */
-typedef void (*rdx_cb_t)(radix_node_t *, void *);
-
-radix_tree_t *New_Radix(void);
-void Destroy_Radix(radix_tree_t *radix, rdx_cb_t func, void *cbctx);
-radix_node_t *radix_lookup(radix_tree_t *radix, prefix_t *prefix);
-void radix_remove(radix_tree_t *radix, radix_node_t *node);
-radix_node_t *radix_search_exact(radix_tree_t *radix, prefix_t *prefix);
-radix_node_t *radix_search_best(radix_tree_t *radix, prefix_t *prefix);
-void radix_process(radix_tree_t *radix, rdx_cb_t func, void *cbctx);
-
-#define RADIX_MAXBITS 128
-
-#define RADIX_WALK(Xhead, Xnode) \
-	do { \
-		radix_node_t *Xstack[RADIX_MAXBITS+1]; \
-		radix_node_t **Xsp = Xstack; \
-		radix_node_t *Xrn = (Xhead); \
-		while ((Xnode = Xrn)) { \
-			if (Xnode->prefix)
-
-#define RADIX_WALK_END \
-			if (Xrn->l) { \
-				if (Xrn->r) { \
-					*Xsp++ = Xrn->r; \
-				} \
-				Xrn = Xrn->l; \
-			} else if (Xrn->r) { \
-				Xrn = Xrn->r; \
-			} else if (Xsp != Xstack) { \
-				Xrn = *(--Xsp); \
-			} else { \
-				Xrn = (radix_node_t *) 0; \
-			} \
-		} \
-	} while (0)
-
-/* Local additions */
-
-prefix_t *prefix_pton(const char *string, long len, prefix_t *prefix, const char **errmsg);
-prefix_t *prefix_from_blob(unsigned char *blob, int len, int prefixlen, prefix_t *prefix);
-const char *prefix_addr_ntop(prefix_t *prefix, char *buf, size_t len);
-const char *prefix_ntop(prefix_t *prefix, char *buf, size_t len);
-
-#endif /* _RADIX_H */
+/*
+ * Copyright (c) 1999-2000
+ * 
+ * The Regents of the University of Michigan ("The Regents") and
+ * Merit Network, Inc. All rights reserved.  Redistribution and use
+ * in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above 
+ * copyright notice, this list of conditions and the 
+ * following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above 
+ * copyright notice, this list of conditions and the 
+ * following disclaimer in the documentation and/or other 
+ * materials provided with the distribution.
+ * 
+ * 3. All advertising materials mentioning features or use of 
+ * this software must display the following acknowledgement:
+ * 
+ *   This product includes software developed by the University of
+ *   Michigan, Merit Network, Inc., and their contributors.
+ * 
+ * 4. Neither the name of the University, Merit Network, nor the
+ * names of their contributors may be used to endorse or 
+ * promote products derived from this software without 
+ * specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL TH E REGENTS
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HO WEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/*
+ * Portions Copyright (c) 2004,2005 Damien Miller <djm@mindrot.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id: radix.h,v 1.9 2007/10/24 06:03:08 djm Exp $ */
+
+#ifndef _RADIX_H
+#define _RADIX_H
+
+#if defined(_MSC_VER)
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+# include <sys/types.h>
+# include <sys/socket.h>
+# include <netinet/in.h>
+# include <arpa/inet.h>
+# include <netdb.h>
+#endif
+
+#if defined(_MSC_VER)
+# define snprintf _snprintf
+typedef unsigned __int8		u_int8_t;
+typedef unsigned __int16	u_int16_t;
+typedef unsigned __int32	u_int32_t;
+const char *inet_ntop(int af, const void *src, char *dst, size_t size);
+size_t strlcpy(char *dst, const char *src, size_t size);
+#endif
+
+/*
+ * Originally from MRT include/mrt.h
+ * $MRTId: mrt.h,v 1.1.1.1 2000/08/14 18:46:10 labovit Exp $
+ */
+typedef struct _prefix_t {
+	u_int family;			/* AF_INET | AF_INET6 */
+	u_int bitlen;			/* same as mask? */
+	int ref_count;			/* reference count */
+	union {
+		struct in_addr sin;
+		struct in6_addr sin6;
+	} add;
+} prefix_t;
+
+void Deref_Prefix(prefix_t *prefix);
+
+/*
+ * Originally from MRT include/radix.h
+ * $MRTId: radix.h,v 1.1.1.1 2000/08/14 18:46:10 labovit Exp $
+ */
+typedef struct _radix_node_t {
+	u_int bit;			/* flag if this node used */
+	prefix_t *prefix;		/* who we are in radix tree */
+	struct _radix_node_t *l, *r;	/* left and right children */
+	struct _radix_node_t *parent;	/* may be used */
+	void *data;			/* pointer to data */
+} radix_node_t;
+
+typedef struct _radix_tree_t {
+	radix_node_t *head;
+	u_int maxbits;			/* for IP, 32 bit addresses */
+	int num_active_node;		/* for debug purpose */
+} radix_tree_t;
+
+/* Type of callback function */
+typedef void (*rdx_cb_t)(radix_node_t *, void *);
+
+radix_tree_t *New_Radix(void);
+void Destroy_Radix(radix_tree_t *radix, rdx_cb_t func, void *cbctx);
+radix_node_t *radix_lookup(radix_tree_t *radix, prefix_t *prefix);
+void radix_remove(radix_tree_t *radix, radix_node_t *node);
+radix_node_t *radix_search_exact(radix_tree_t *radix, prefix_t *prefix);
+radix_node_t *radix_search_best(radix_tree_t *radix, prefix_t *prefix);
+void radix_process(radix_tree_t *radix, rdx_cb_t func, void *cbctx);
+
+#define RADIX_MAXBITS 128
+
+#define RADIX_WALK(Xhead, Xnode) \
+	do { \
+		radix_node_t *Xstack[RADIX_MAXBITS+1]; \
+		radix_node_t **Xsp = Xstack; \
+		radix_node_t *Xrn = (Xhead); \
+		while ((Xnode = Xrn)) { \
+			if (Xnode->prefix)
+
+#define RADIX_WALK_END \
+			if (Xrn->l) { \
+				if (Xrn->r) { \
+					*Xsp++ = Xrn->r; \
+				} \
+				Xrn = Xrn->l; \
+			} else if (Xrn->r) { \
+				Xrn = Xrn->r; \
+			} else if (Xsp != Xstack) { \
+				Xrn = *(--Xsp); \
+			} else { \
+				Xrn = (radix_node_t *) 0; \
+			} \
+		} \
+	} while (0)
+
+/* Local additions */
+
+prefix_t *prefix_pton(const char *string, long len, prefix_t *prefix, const char **errmsg);
+prefix_t *prefix_from_blob(unsigned char *blob, int len, int prefixlen, prefix_t *prefix);
+const char *prefix_addr_ntop(prefix_t *prefix, char *buf, size_t len);
+const char *prefix_ntop(prefix_t *prefix, char *buf, size_t len);
+
+#endif /* _RADIX_H */
+

src/include/rbtree.h

@@ -1,287 +1,305 @@
-
-#ifndef _GENERIC_RBTREE_H
-#define _GENERIC_RBTREE_H
-
-#include <stddef.h>
-
-struct rb_node {
-	unsigned long __rb_parent_color;
-	struct rb_node *rb_right;
-	struct rb_node *rb_left;
-} __attribute__((aligned(sizeof(long))));
-/* The alignment might seem pointless, but allegedly CRIS needs it */
-
-struct rb_root {
-	struct rb_node *rb_node;
-};
-
-#define rb_parent(r) ((struct rb_node *)((r)->__rb_parent_color & ~3))
-
-#define RB_ROOT                                                                                                                                                \
-	(struct rb_root)                                                                                                                                           \
-	{                                                                                                                                                          \
-		NULL,                                                                                                                                                  \
-	}
-#define rb_entry(ptr, type, member) container_of(ptr, type, member)
-
-#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL)
-
-/* 'empty' nodes are nodes that are known not to be inserted in an rbtree */
-#define RB_EMPTY_NODE(node) ((node)->__rb_parent_color == (unsigned long)(node))
-#define RB_CLEAR_NODE(node) ((node)->__rb_parent_color = (unsigned long)(node))
-
-extern void rb_insert_color(struct rb_node *, struct rb_root *);
-extern void rb_erase(struct rb_node *, struct rb_root *);
-
-/* Find logical next and previous nodes in a tree */
-extern struct rb_node *rb_next(const struct rb_node *);
-extern struct rb_node *rb_prev(const struct rb_node *);
-extern struct rb_node *rb_first(const struct rb_root *);
-extern struct rb_node *rb_last(const struct rb_root *);
-
-/* Postorder iteration - always visit the parent after its children */
-extern struct rb_node *rb_first_postorder(const struct rb_root *);
-extern struct rb_node *rb_next_postorder(const struct rb_node *);
-
-/* Fast replacement of a single node without remove/rebalance/add/rebalance */
-extern void rb_replace_node(struct rb_node *victim, struct rb_node *new_node, struct rb_root *root);
-
-static inline void rb_link_node(struct rb_node *node, struct rb_node *parent, struct rb_node **rb_link)
-{
-	node->__rb_parent_color = (unsigned long)parent;
-	node->rb_left = node->rb_right = NULL;
-
-	*rb_link = node;
-}
-
-#define rb_entry_safe(ptr, type, member)                                                                                                                       \
-	({                                                                                                                                                         \
-		typeof(ptr) ____ptr = (ptr);                                                                                                                           \
-		____ptr ? rb_entry(____ptr, type, member) : NULL;                                                                                                      \
-	})
-
-/*
- * Handy for checking that we are not deleting an entry that is
- * already in a list, found in block/{blk-throttle,cfq-iosched}.c,
- * probably should be moved to lib/rbtree.c...
- */
-static inline void rb_erase_init(struct rb_node *n, struct rb_root *root)
-{
-	rb_erase(n, root);
-	RB_CLEAR_NODE(n);
-}
-
-
-/*
- * Please note - only struct rb_augment_callbacks and the prototypes for
- * rb_insert_augmented() and rb_erase_augmented() are intended to be public.
- * The rest are implementation details you are not expected to depend on.
- *
- * See Documentation/rbtree.txt for documentation and samples.
- */
-
-struct rb_augment_callbacks {
-	void (*propagate)(struct rb_node *node, struct rb_node *stop);
-	void (*copy)(struct rb_node *old_node, struct rb_node *new_node);
-	void (*rotate)(struct rb_node *old_node, struct rb_node *new_node);
-};
-
-extern void __rb_insert_augmented(struct rb_node *node, struct rb_root *root,
-	void (*augment_rotate)(struct rb_node *old_node, struct rb_node *new_node));
-/*
- * Fixup the rbtree and update the augmented information when rebalancing.
- *
- * On insertion, the user must update the augmented information on the path
- * leading to the inserted node, then call rb_link_node() as usual and
- * rb_augment_inserted() instead of the usual rb_insert_color() call.
- * If rb_augment_inserted() rebalances the rbtree, it will callback into
- * a user provided function to update the augmented information on the
- * affected subtrees.
- */
-static inline void
-rb_insert_augmented(struct rb_node *node, struct rb_root *root,
-		    const struct rb_augment_callbacks *augment)
-{
-	__rb_insert_augmented(node, root, augment->rotate);
-}
-
-#define RB_DECLARE_CALLBACKS(rbstatic, rbname, rbstruct, rbfield,	\
-			     rbtype, rbaugmented, rbcompute)		\
-static inline void							\
-rbname ## _propagate(struct rb_node *rb, struct rb_node *stop)		\
-{									\
-	while (rb != stop) {						\
-		rbstruct *node = rb_entry(rb, rbstruct, rbfield);	\
-		rbtype augmented = rbcompute(node);			\
-		if (node->rbaugmented == augmented)			\
-			break;						\
-		node->rbaugmented = augmented;				\
-		rb = rb_parent(&node->rbfield);				\
-	}								\
-}									\
-static inline void							\
-rbname ## _copy(struct rb_node *rb_old, struct rb_node *rb_new)		\
-{									\
-	rbstruct *old_node = rb_entry(rb_old, rbstruct, rbfield);		\
-	rbstruct *new_node = rb_entry(rb_new, rbstruct, rbfield);		\
-	new_node->rbaugmented = old_node->rbaugmented;				\
-}									\
-static void								\
-rbname ## _rotate(struct rb_node *rb_old, struct rb_node *rb_new)	\
-{									\
-	rbstruct *old_node = rb_entry(rb_old, rbstruct, rbfield);		\
-	rbstruct *new_node = rb_entry(rb_new, rbstruct, rbfield);		\
-	new_node->rbaugmented = old_node->rbaugmented;				\
-	old_node->rbaugmented = rbcompute(old_node);				\
-}									\
-rbstatic const struct rb_augment_callbacks rbname = {			\
-	rbname ## _propagate, rbname ## _copy, rbname ## _rotate	\
-};
-
-
-#define	RB_RED		0
-#define	RB_BLACK	1
-
-#define __rb_parent(pc)    ((struct rb_node *)(pc & ~3))
-
-#define __rb_color(pc)     ((pc) & 1)
-#define __rb_is_black(pc)  __rb_color(pc)
-#define __rb_is_red(pc)    (!__rb_color(pc))
-#define rb_color(rb)       __rb_color((rb)->__rb_parent_color)
-#define rb_is_red(rb)      __rb_is_red((rb)->__rb_parent_color)
-#define rb_is_black(rb)    __rb_is_black((rb)->__rb_parent_color)
-
-static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
-{
-	rb->__rb_parent_color = rb_color(rb) | (unsigned long)p;
-}
-
-static inline void rb_set_parent_color(struct rb_node *rb,
-				       struct rb_node *p, int color)
-{
-	rb->__rb_parent_color = (unsigned long)p | color;
-}
-
-static inline void
-__rb_change_child(struct rb_node *old_node, struct rb_node *new_node,
-		  struct rb_node *parent, struct rb_root *root)
-{
-	if (parent) {
-		if (parent->rb_left == old_node)
-			parent->rb_left = new_node;
-		else
-			parent->rb_right = new_node;
-	} else
-		root->rb_node = new_node;
-}
-
-extern void __rb_erase_color(struct rb_node *parent, struct rb_root *root,
-	void (*augment_rotate)(struct rb_node *old_node, struct rb_node *new_node));
-
-static inline struct rb_node *
-__rb_erase_augmented(struct rb_node *node, struct rb_root *root,
-		     const struct rb_augment_callbacks *augment)
-{
-	struct rb_node *child = node->rb_right, *tmp = node->rb_left;
-	struct rb_node *parent, *rebalance;
-	unsigned long pc;
-
-	if (!tmp) {
-		/*
-		 * Case 1: node to erase has no more than 1 child (easy!)
-		 *
-		 * Note that if there is one child it must be red due to 5)
-		 * and node must be black due to 4). We adjust colors locally
-		 * so as to bypass __rb_erase_color() later on.
-		 */
-		pc = node->__rb_parent_color;
-		parent = __rb_parent(pc);
-		__rb_change_child(node, child, parent, root);
-		if (child) {
-			child->__rb_parent_color = pc;
-			rebalance = NULL;
-		} else
-			rebalance = __rb_is_black(pc) ? parent : NULL;
-		tmp = parent;
-	} else if (!child) {
-		/* Still case 1, but this time the child is node->rb_left */
-		tmp->__rb_parent_color = pc = node->__rb_parent_color;
-		parent = __rb_parent(pc);
-		__rb_change_child(node, tmp, parent, root);
-		rebalance = NULL;
-		tmp = parent;
-	} else {
-		struct rb_node *successor = child, *child2;
-		tmp = child->rb_left;
-		if (!tmp) {
-			/*
-			 * Case 2: node's successor is its right child
-			 *
-			 *    (n)          (s)
-			 *    / \          / \
-			 *  (x) (s)  ->  (x) (c)
-			 *        \
-			 *        (c)
-			 */
-			parent = successor;
-			child2 = successor->rb_right;
-			augment->copy(node, successor);
-		} else {
-			/*
-			 * Case 3: node's successor is leftmost under
-			 * node's right child subtree
-			 *
-			 *    (n)          (s)
-			 *    / \          / \
-			 *  (x) (y)  ->  (x) (y)
-			 *      /            /
-			 *    (p)          (p)
-			 *    /            /
-			 *  (s)          (c)
-			 *    \
-			 *    (c)
-			 */
-			do {
-				parent = successor;
-				successor = tmp;
-				tmp = tmp->rb_left;
-			} while (tmp);
-			parent->rb_left = child2 = successor->rb_right;
-			successor->rb_right = child;
-			rb_set_parent(child, successor);
-			augment->copy(node, successor);
-			augment->propagate(parent, successor);
-		}
-
-		successor->rb_left = tmp = node->rb_left;
-		rb_set_parent(tmp, successor);
-
-		pc = node->__rb_parent_color;
-		tmp = __rb_parent(pc);
-		__rb_change_child(node, successor, tmp, root);
-		if (child2) {
-			successor->__rb_parent_color = pc;
-			rb_set_parent_color(child2, parent, RB_BLACK);
-			rebalance = NULL;
-		} else {
-			unsigned long pc2 = successor->__rb_parent_color;
-			successor->__rb_parent_color = pc;
-			rebalance = __rb_is_black(pc2) ? parent : NULL;
-		}
-		tmp = successor;
-	}
-
-	augment->propagate(tmp, NULL);
-	return rebalance;
-}
-
-static inline void
-rb_erase_augmented(struct rb_node *node, struct rb_root *root,
-		   const struct rb_augment_callbacks *augment)
-{
-	struct rb_node *rebalance = __rb_erase_augmented(node, root, augment);
-	if (rebalance)
-		__rb_erase_color(rebalance, root, augment->rotate);
-}
-
-#endif /* _GENERIC_RBTREE_H */
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _GENERIC_RBTREE_H
+#define _GENERIC_RBTREE_H
+
+#include <stddef.h>
+
+struct rb_node {
+	unsigned long __rb_parent_color;
+	struct rb_node *rb_right;
+	struct rb_node *rb_left;
+} __attribute__((aligned(sizeof(long))));
+/* The alignment might seem pointless, but allegedly CRIS needs it */
+
+struct rb_root {
+	struct rb_node *rb_node;
+};
+
+#define rb_parent(r) ((struct rb_node *)((r)->__rb_parent_color & ~3))
+
+#define RB_ROOT                                                                                                                                                \
+	(struct rb_root)                                                                                                                                           \
+	{                                                                                                                                                          \
+		NULL,                                                                                                                                                  \
+	}
+#define rb_entry(ptr, type, member) container_of(ptr, type, member)
+
+#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL)
+
+/* 'empty' nodes are nodes that are known not to be inserted in an rbtree */
+#define RB_EMPTY_NODE(node) ((node)->__rb_parent_color == (unsigned long)(node))
+#define RB_CLEAR_NODE(node) ((node)->__rb_parent_color = (unsigned long)(node))
+
+extern void rb_insert_color(struct rb_node *, struct rb_root *);
+extern void rb_erase(struct rb_node *, struct rb_root *);
+
+/* Find logical next and previous nodes in a tree */
+extern struct rb_node *rb_next(const struct rb_node *);
+extern struct rb_node *rb_prev(const struct rb_node *);
+extern struct rb_node *rb_first(const struct rb_root *);
+extern struct rb_node *rb_last(const struct rb_root *);
+
+/* Postorder iteration - always visit the parent after its children */
+extern struct rb_node *rb_first_postorder(const struct rb_root *);
+extern struct rb_node *rb_next_postorder(const struct rb_node *);
+
+/* Fast replacement of a single node without remove/rebalance/add/rebalance */
+extern void rb_replace_node(struct rb_node *victim, struct rb_node *new_node, struct rb_root *root);
+
+static inline void rb_link_node(struct rb_node *node, struct rb_node *parent, struct rb_node **rb_link)
+{
+	node->__rb_parent_color = (unsigned long)parent;
+	node->rb_left = node->rb_right = NULL;
+
+	*rb_link = node;
+}
+
+#define rb_entry_safe(ptr, type, member)                                                                                                                       \
+	({                                                                                                                                                         \
+		typeof(ptr) ____ptr = (ptr);                                                                                                                           \
+		____ptr ? rb_entry(____ptr, type, member) : NULL;                                                                                                      \
+	})
+
+/*
+ * Handy for checking that we are not deleting an entry that is
+ * already in a list, found in block/{blk-throttle,cfq-iosched}.c,
+ * probably should be moved to lib/rbtree.c...
+ */
+static inline void rb_erase_init(struct rb_node *n, struct rb_root *root)
+{
+	rb_erase(n, root);
+	RB_CLEAR_NODE(n);
+}
+
+
+/*
+ * Please note - only struct rb_augment_callbacks and the prototypes for
+ * rb_insert_augmented() and rb_erase_augmented() are intended to be public.
+ * The rest are implementation details you are not expected to depend on.
+ *
+ * See Documentation/rbtree.txt for documentation and samples.
+ */
+
+struct rb_augment_callbacks {
+	void (*propagate)(struct rb_node *node, struct rb_node *stop);
+	void (*copy)(struct rb_node *old_node, struct rb_node *new_node);
+	void (*rotate)(struct rb_node *old_node, struct rb_node *new_node);
+};
+
+extern void __rb_insert_augmented(struct rb_node *node, struct rb_root *root,
+	void (*augment_rotate)(struct rb_node *old_node, struct rb_node *new_node));
+/*
+ * Fixup the rbtree and update the augmented information when rebalancing.
+ *
+ * On insertion, the user must update the augmented information on the path
+ * leading to the inserted node, then call rb_link_node() as usual and
+ * rb_augment_inserted() instead of the usual rb_insert_color() call.
+ * If rb_augment_inserted() rebalances the rbtree, it will callback into
+ * a user provided function to update the augmented information on the
+ * affected subtrees.
+ */
+static inline void
+rb_insert_augmented(struct rb_node *node, struct rb_root *root,
+		    const struct rb_augment_callbacks *augment)
+{
+	__rb_insert_augmented(node, root, augment->rotate);
+}
+
+#define RB_DECLARE_CALLBACKS(rbstatic, rbname, rbstruct, rbfield,	\
+			     rbtype, rbaugmented, rbcompute)		\
+static inline void							\
+rbname ## _propagate(struct rb_node *rb, struct rb_node *stop)		\
+{									\
+	while (rb != stop) {						\
+		rbstruct *node = rb_entry(rb, rbstruct, rbfield);	\
+		rbtype augmented = rbcompute(node);			\
+		if (node->rbaugmented == augmented)			\
+			break;						\
+		node->rbaugmented = augmented;				\
+		rb = rb_parent(&node->rbfield);				\
+	}								\
+}									\
+static inline void							\
+rbname ## _copy(struct rb_node *rb_old, struct rb_node *rb_new)		\
+{									\
+	rbstruct *old_node = rb_entry(rb_old, rbstruct, rbfield);		\
+	rbstruct *new_node = rb_entry(rb_new, rbstruct, rbfield);		\
+	new_node->rbaugmented = old_node->rbaugmented;				\
+}									\
+static void								\
+rbname ## _rotate(struct rb_node *rb_old, struct rb_node *rb_new)	\
+{									\
+	rbstruct *old_node = rb_entry(rb_old, rbstruct, rbfield);		\
+	rbstruct *new_node = rb_entry(rb_new, rbstruct, rbfield);		\
+	new_node->rbaugmented = old_node->rbaugmented;				\
+	old_node->rbaugmented = rbcompute(old_node);				\
+}									\
+rbstatic const struct rb_augment_callbacks rbname = {			\
+	rbname ## _propagate, rbname ## _copy, rbname ## _rotate	\
+};
+
+
+#define	RB_RED		0
+#define	RB_BLACK	1
+
+#define __rb_parent(pc)    ((struct rb_node *)(pc & ~3))
+
+#define __rb_color(pc)     ((pc) & 1)
+#define __rb_is_black(pc)  __rb_color(pc)
+#define __rb_is_red(pc)    (!__rb_color(pc))
+#define rb_color(rb)       __rb_color((rb)->__rb_parent_color)
+#define rb_is_red(rb)      __rb_is_red((rb)->__rb_parent_color)
+#define rb_is_black(rb)    __rb_is_black((rb)->__rb_parent_color)
+
+static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
+{
+	rb->__rb_parent_color = rb_color(rb) | (unsigned long)p;
+}
+
+static inline void rb_set_parent_color(struct rb_node *rb,
+				       struct rb_node *p, int color)
+{
+	rb->__rb_parent_color = (unsigned long)p | color;
+}
+
+static inline void
+__rb_change_child(struct rb_node *old_node, struct rb_node *new_node,
+		  struct rb_node *parent, struct rb_root *root)
+{
+	if (parent) {
+		if (parent->rb_left == old_node)
+			parent->rb_left = new_node;
+		else
+			parent->rb_right = new_node;
+	} else
+		root->rb_node = new_node;
+}
+
+extern void __rb_erase_color(struct rb_node *parent, struct rb_root *root,
+	void (*augment_rotate)(struct rb_node *old_node, struct rb_node *new_node));
+
+static inline struct rb_node *
+__rb_erase_augmented(struct rb_node *node, struct rb_root *root,
+		     const struct rb_augment_callbacks *augment)
+{
+	struct rb_node *child = node->rb_right, *tmp = node->rb_left;
+	struct rb_node *parent, *rebalance;
+	unsigned long pc;
+
+	if (!tmp) {
+		/*
+		 * Case 1: node to erase has no more than 1 child (easy!)
+		 *
+		 * Note that if there is one child it must be red due to 5)
+		 * and node must be black due to 4). We adjust colors locally
+		 * so as to bypass __rb_erase_color() later on.
+		 */
+		pc = node->__rb_parent_color;
+		parent = __rb_parent(pc);
+		__rb_change_child(node, child, parent, root);
+		if (child) {
+			child->__rb_parent_color = pc;
+			rebalance = NULL;
+		} else
+			rebalance = __rb_is_black(pc) ? parent : NULL;
+		tmp = parent;
+	} else if (!child) {
+		/* Still case 1, but this time the child is node->rb_left */
+		tmp->__rb_parent_color = pc = node->__rb_parent_color;
+		parent = __rb_parent(pc);
+		__rb_change_child(node, tmp, parent, root);
+		rebalance = NULL;
+		tmp = parent;
+	} else {
+		struct rb_node *successor = child, *child2;
+		tmp = child->rb_left;
+		if (!tmp) {
+			/*
+			 * Case 2: node's successor is its right child
+			 *
+			 *    (n)          (s)
+			 *    / \          / \
+			 *  (x) (s)  ->  (x) (c)
+			 *        \
+			 *        (c)
+			 */
+			parent = successor;
+			child2 = successor->rb_right;
+			augment->copy(node, successor);
+		} else {
+			/*
+			 * Case 3: node's successor is leftmost under
+			 * node's right child subtree
+			 *
+			 *    (n)          (s)
+			 *    / \          / \
+			 *  (x) (y)  ->  (x) (y)
+			 *      /            /
+			 *    (p)          (p)
+			 *    /            /
+			 *  (s)          (c)
+			 *    \
+			 *    (c)
+			 */
+			do {
+				parent = successor;
+				successor = tmp;
+				tmp = tmp->rb_left;
+			} while (tmp);
+			parent->rb_left = child2 = successor->rb_right;
+			successor->rb_right = child;
+			rb_set_parent(child, successor);
+			augment->copy(node, successor);
+			augment->propagate(parent, successor);
+		}
+
+		successor->rb_left = tmp = node->rb_left;
+		rb_set_parent(tmp, successor);
+
+		pc = node->__rb_parent_color;
+		tmp = __rb_parent(pc);
+		__rb_change_child(node, successor, tmp, root);
+		if (child2) {
+			successor->__rb_parent_color = pc;
+			rb_set_parent_color(child2, parent, RB_BLACK);
+			rebalance = NULL;
+		} else {
+			unsigned long pc2 = successor->__rb_parent_color;
+			successor->__rb_parent_color = pc;
+			rebalance = __rb_is_black(pc2) ? parent : NULL;
+		}
+		tmp = successor;
+	}
+
+	augment->propagate(tmp, NULL);
+	return rebalance;
+}
+
+static inline void
+rb_erase_augmented(struct rb_node *node, struct rb_root *root,
+		   const struct rb_augment_callbacks *augment)
+{
+	struct rb_node *rebalance = __rb_erase_augmented(node, root, augment);
+	if (rebalance)
+		__rb_erase_color(rebalance, root, augment->rotate);
+}
+
+#endif /* _GENERIC_RBTREE_H */
+

src/include/stringutil.h

@@ -0,0 +1,42 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _GENERIC_STRING_UITL_H
+#define _GENERIC_STRING_UITL_H
+
+#include <stddef.h>
+#include <string.h>
+
+static inline char *safe_strncpy(char *dest, const char *src, size_t n) 
+{
+#if __GNUC__  > 7
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-truncation"
+#endif
+	char *ret = strncpy(dest, src, n - 1);
+    if (n > 0) {
+	    dest[n - 1] = '\0';
+    }
+#if __GNUC__  > 7
+#pragma GCC diagnostic pop
+#endif
+	return ret;
+}
+
+
+#endif

src/lib/bitops.c

@@ -1,3 +1,20 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #include "bitmap.h"
 #include "bitops.h"

src/lib/conf.c

@@ -1,280 +1,311 @@
-#include "conf.h"
-#include <getopt.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-int conf_custom(const char *item, void *data, int argc, char *argv[])
-{
-	struct config_item_custom *item_custom = data;
-	return item_custom->custom_func(item_custom->custom_data, argc, argv);
-}
-
-int conf_int(const char *item, void *data, int argc, char *argv[])
-{
-	struct config_item_int *item_int = data;
-	int value = 0;
-	if (argc < 2) {
-		return -1;
-	}
-
-	value = atoi(argv[1]);
-
-	if (value < item_int->min) {
-		value = item_int->min;
-	} else if (value > item_int->max) {
-		value = item_int->max;
-	}
-
-	*(item_int->data) = value;
-
-	return 0;
-}
-
-int conf_string(const char *item, void *data, int argc, char *argv[])
-{
-	struct config_item_string *item_string = data;
-
-	if (argc < 2) {
-		return -1;
-	}
-
-	strncpy(item_string->data, argv[1], item_string->size);
-
-	return 0;
-}
-
-int conf_yesno(const char *item, void *data, int argc, char *argv[])
-{
-	struct config_item_yesno *item_yesno = data;
-	int yes = 0;
-
-	if (argc < 2) {
-		return -1;
-	}
-
-	char *value = argv[1];
-	if (strncmp("yes", value, sizeof("yes")) == 0 || strncmp("YES", value, sizeof("YES")) == 0) {
-		yes = 1;
-	} else if (strncmp("no", value, sizeof("no")) == 0 || strncmp("NO", value, sizeof("NO")) == 0) {
-		yes = 0;
-	}
-
-	*(item_yesno->data) = yes;
-
-	return 0;
-}
-
-int conf_size(const char *item, void *data, int argc, char *argv[])
-{
-	/* read dns cache size */
-	int base = 1;
-	size_t size = 0;
-	int num = 0;
-	struct config_item_size *item_size = data;
-	char *value = argv[1];
-
-	if (strstr(value, "k") || strstr(value, "K")) {
-		base = 1024;
-	} else if (strstr(value, "m") || strstr(value, "M")) {
-		base = 1024 * 1024;
-	} else if (strstr(value, "g") || strstr(value, "G")) {
-		base = 1024 * 1024 * 1024;
-	}
-
-	num = atoi(value);
-	if (num < 0) {
-		return -1;
-	}
-
-	size = num * base;
-	if (size > item_size->max) {
-		size = item_size->max;
-	} else if (size < item_size->min) {
-		size = item_size->min;
-	}
-
-	*(item_size->data) = size;
-
-	return 0;
-}
-
-void conf_getopt_reset(void)
-{
-	static struct option long_options[] = {{"-", 0, 0, 0}, {0, 0, 0, 0}};
-	int argc = 2;
-	char *argv[3] = {"reset", "", 0};
-
-	optind = 1;
-	opterr = 0;
-	getopt_long(argc, argv, "", long_options, NULL);
-	optind = 1;
-	opterr = 0;
-}
-
-int conf_parse_args(char *key, char *value, int *argc, char **argv)
-{
-	char *start = NULL;
-	char *ptr = value;
-	int count = 0;
-	int sep_flag = ' ';
-
-	argv[0] = key;
-	count++;
-
-	while (*ptr != '\0') {
-		if (*ptr == '\\') {
-			char *tmp = ptr + 1;
-			while (*tmp != '\0') {
-				*(tmp - 1) = *tmp;
-				tmp++;
-			}
-			ptr++;
-			continue;
-		}
-
-		if (*ptr == '"' && start == NULL) {
-			sep_flag = '"';
-			start = NULL;
-		}
-
-		if (*ptr != sep_flag && start == NULL) {
-			start = ptr;
-			ptr++;
-			continue;
-		}
-
-		if (*ptr == sep_flag && start == NULL) {
-			ptr++;
-			continue;
-		}
-
-		if (*ptr == sep_flag && start) {
-			argv[count] = start;
-			*ptr = '\0';
-			ptr++;
-			start = ptr;
-			count++;
-			sep_flag = ' ';
-			start = NULL;
-			continue;
-		}
-
-		ptr++;
-	}
-
-	if (start != ptr && start) {
-		argv[count] = start;
-		count++;
-	}
-
-	*argc = count;
-	argv[count + 1] = 0;
-
-	return 0;
-}
-
-void load_exit(void)
-{
-	return;
-}
-
-int load_conf_printf(const char *file, int lineno, int ret)
-{
-	if (ret != CONF_RET_OK) {
-		printf("process config file '%s' failed at line %d.", file, lineno);
-		if (ret == CONF_RET_ERR || ret == CONF_RET_NOENT) {
-			return -1;
-		}
-
-		return 0;
-	}
-
-	return 0;
-}
-
-int load_conf_file(const char *file, struct config_item *items, conf_error_handler handler)
-{
-	FILE *fp = NULL;
-	char line[MAX_LINE_LEN];
-	char key[MAX_KEY_LEN];
-	char value[MAX_LINE_LEN];
-	int filed_num = 0;
-	int i;
-	int argc;
-	char *argv[1024];
-	int ret = 0;
-	int call_ret = 0;
-	int line_no = 0;
-
-	if (handler == NULL) {
-		handler = load_conf_printf;
-	}
-
-	fp = fopen(file, "r");
-	if (fp == NULL) {
-		return -1;
-	}
-
-	line_no = 0;
-	while (fgets(line, MAX_LINE_LEN, fp)) {
-		line_no++;
-		filed_num = sscanf(line, "%63s %1023[^\r\n]s", key, value);
-		if (filed_num <= 0) {
-			continue;
-		}
-
-		/* comment, skip */
-		if (key[0] == '#') {
-			continue;
-		}
-
-		/* if field format is not key = value, error */
-		if (filed_num != 2) {
-			goto errout;
-		}
-
-		for (i = 0;; i++) {
-			if (items[i].item == NULL) {
-				handler(file, line_no, CONF_RET_NOENT);
-				break;
-			}
-
-			if (strncmp(items[i].item, key, MAX_KEY_LEN) != 0) {
-				continue;
-			}
-
-			if (conf_parse_args(key, value, &argc, argv) != 0) {
-				continue;
-			}
-
-			conf_getopt_reset();
-			/* call item function */
-			call_ret = items[i].item_func(items[i].item, items[i].data, argc, argv);
-			ret = handler(file, line_no, call_ret);
-			if (ret != 0) {
-				conf_getopt_reset();
-				goto errout;
-			}
-
-			conf_getopt_reset();
-
-			break;
-		}
-	}
-
-	fclose(fp);
-
-	return 0;
-errout:
-	if (fp) {
-		fclose(fp);
-	}
-	return -1;
-}
-
-int load_conf(const char *file, struct config_item items[], conf_error_handler handler)
-{
-	return load_conf_file(file, items, handler);
-}
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "conf.h"
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static const char *currrent_conf_file = NULL;
+
+const char *conf_get_conf_file(void)
+{
+	return currrent_conf_file;
+}
+
+int conf_custom(const char *item, void *data, int argc, char *argv[])
+{
+	struct config_item_custom *item_custom = data;
+	return item_custom->custom_func(item_custom->custom_data, argc, argv);
+}
+
+int conf_int(const char *item, void *data, int argc, char *argv[])
+{
+	struct config_item_int *item_int = data;
+	int value = 0;
+	if (argc < 2) {
+		return -1;
+	}
+
+	value = atoi(argv[1]);
+
+	if (value < item_int->min) {
+		value = item_int->min;
+	} else if (value > item_int->max) {
+		value = item_int->max;
+	}
+
+	*(item_int->data) = value;
+
+	return 0;
+}
+
+int conf_string(const char *item, void *data, int argc, char *argv[])
+{
+	struct config_item_string *item_string = data;
+
+	if (argc < 2) {
+		return -1;
+	}
+
+	strncpy(item_string->data, argv[1], item_string->size);
+
+	return 0;
+}
+
+int conf_yesno(const char *item, void *data, int argc, char *argv[])
+{
+	struct config_item_yesno *item_yesno = data;
+	int yes = 0;
+
+	if (argc < 2) {
+		return -1;
+	}
+
+	char *value = argv[1];
+	if (strncmp("auto", value, sizeof("auto")) == 0 || strncmp("AUTO", value, sizeof("AUTO")) == 0) {
+		return 0;
+	}
+
+	if (strncmp("yes", value, sizeof("yes")) == 0 || strncmp("YES", value, sizeof("YES")) == 0) {
+		yes = 1;
+	} else if (strncmp("no", value, sizeof("no")) == 0 || strncmp("NO", value, sizeof("NO")) == 0) {
+		yes = 0;
+	}
+
+	*(item_yesno->data) = yes;
+
+	return 0;
+}
+
+int conf_size(const char *item, void *data, int argc, char *argv[])
+{
+	/* read dns cache size */
+	int base = 1;
+	size_t size = 0;
+	int num = 0;
+	struct config_item_size *item_size = data;
+	char *value = argv[1];
+
+	if (strstr(value, "k") || strstr(value, "K")) {
+		base = 1024;
+	} else if (strstr(value, "m") || strstr(value, "M")) {
+		base = 1024 * 1024;
+	} else if (strstr(value, "g") || strstr(value, "G")) {
+		base = 1024 * 1024 * 1024;
+	}
+
+	num = atoi(value);
+	if (num < 0) {
+		return -1;
+	}
+
+	size = num * base;
+	if (size > item_size->max) {
+		size = item_size->max;
+	} else if (size < item_size->min) {
+		size = item_size->min;
+	}
+
+	*(item_size->data) = size;
+
+	return 0;
+}
+
+void conf_getopt_reset(void)
+{
+	static struct option long_options[] = {{"-", 0, 0, 0}, {0, 0, 0, 0}};
+	int argc = 2;
+	char *argv[3] = {"reset", "", 0};
+
+	optind = 0;
+	opterr = 0;
+	optopt = 0;
+	getopt_long(argc, argv, "", long_options, NULL);
+	optind = 0;
+	opterr = 0;
+	optopt = 0;
+}
+
+int conf_parse_args(char *key, char *value, int *argc, char **argv)
+{
+	char *start = NULL;
+	char *ptr = value;
+	int count = 0;
+	int sep_flag = ' ';
+
+	argv[0] = key;
+	count++;
+
+	while (*ptr != '\0') {
+		if (*ptr == '\\') {
+			char *tmp = ptr + 1;
+			while (*tmp != '\0') {
+				*(tmp - 1) = *tmp;
+				tmp++;
+			}
+			ptr++;
+			continue;
+		}
+
+		if (*ptr == '"' && start == NULL) {
+			sep_flag = '"';
+			start = NULL;
+		}
+
+		if (*ptr != sep_flag && start == NULL) {
+			start = ptr;
+			ptr++;
+			continue;
+		}
+
+		if (*ptr == sep_flag && start == NULL) {
+			ptr++;
+			continue;
+		}
+
+		if (*ptr == sep_flag && start) {
+			argv[count] = start;
+			*ptr = '\0';
+			ptr++;
+			count++;
+			sep_flag = ' ';
+			start = NULL;
+			continue;
+		}
+
+		ptr++;
+	}
+
+	if (start != ptr && start) {
+		argv[count] = start;
+		count++;
+	}
+
+	*argc = count;
+	argv[count] = 0;
+
+	return 0;
+}
+
+void load_exit(void)
+{
+	return;
+}
+
+int load_conf_printf(const char *file, int lineno, int ret)
+{
+	if (ret != CONF_RET_OK) {
+		printf("process config file '%s' failed at line %d.", file, lineno);
+		if (ret == CONF_RET_ERR || ret == CONF_RET_NOENT) {
+			return -1;
+		}
+
+		return 0;
+	}
+
+	return 0;
+}
+
+int load_conf_file(const char *file, struct config_item *items, conf_error_handler handler)
+{
+	FILE *fp = NULL;
+	char line[MAX_LINE_LEN];
+	char key[MAX_KEY_LEN];
+	char value[MAX_LINE_LEN];
+	int filed_num = 0;
+	int i;
+	int argc;
+	char *argv[1024];
+	int ret = 0;
+	int call_ret = 0;
+	int line_no = 0;
+
+	if (handler == NULL) {
+		handler = load_conf_printf;
+	}
+
+	fp = fopen(file, "r");
+	if (fp == NULL) {
+		return -1;
+	}
+
+	line_no = 0;
+	while (fgets(line, MAX_LINE_LEN, fp)) {
+		line_no++;
+		filed_num = sscanf(line, "%63s %1023[^\r\n]s", key, value);
+		if (filed_num <= 0) {
+			continue;
+		}
+
+		/* comment, skip */
+		if (key[0] == '#') {
+			continue;
+		}
+
+		/* if field format is not key = value, error */
+		if (filed_num != 2) {
+			goto errout;
+		}
+
+		for (i = 0;; i++) {
+			if (items[i].item == NULL) {
+				handler(file, line_no, CONF_RET_NOENT);
+				break;
+			}
+
+			if (strncmp(items[i].item, key, MAX_KEY_LEN) != 0) {
+				continue;
+			}
+
+			if (conf_parse_args(key, value, &argc, argv) != 0) {
+				continue;
+			}
+
+			conf_getopt_reset();
+			/* call item function */
+			currrent_conf_file = file;
+			call_ret = items[i].item_func(items[i].item, items[i].data, argc, argv);
+			ret = handler(file, line_no, call_ret);
+			if (ret != 0) {
+				conf_getopt_reset();
+				goto errout;
+			}
+
+			conf_getopt_reset();
+
+			break;
+		}
+	}
+
+	fclose(fp);
+
+	return 0;
+errout:
+	if (fp) {
+		fclose(fp);
+	}
+	return -1;
+}
+
+int load_conf(const char *file, struct config_item items[], conf_error_handler handler)
+{
+	return load_conf_file(file, items, handler);
+}

src/lib/stringutil.c

@@ -0,0 +1,17 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */

src/smartdns.c

@@ -1,412 +1,462 @@
-/*************************************************************************
- *
- * Copyright (C) 2018 Ruilin Peng (Nick) <pymumu@gmail.com>.
- *
- * smartdns is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * smartdns is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#define _GNU_SOURCE
-#include "art.h"
-#include "atomic.h"
-#include "dns_client.h"
-#include "dns_conf.h"
-#include "dns_server.h"
-#include "fast_ping.h"
-#include "hashtable.h"
-#include "list.h"
-#include "rbtree.h"
-#include "tlog.h"
-#include "util.h"
-#include <errno.h>
-#include <fcntl.h>
-#include <libgen.h>
-#include <openssl/err.h>
-#include <openssl/ssl.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <ucontext.h>
-
-#define RESOLVE_FILE "/etc/resolv.conf"
-#define MAX_LINE_LEN 1024
-#define MAX_KEY_LEN 64
-#define SMARTDNS_PID_FILE "/var/run/smartdns.pid"
-#define TMP_BUFF_LEN_32 32
-
-static int verbose_screen;
-
-void help(void)
-{
-	/* clang-format off */
-	char *help = ""
-		"Usage: smartdns [OPTION]...\n"
-		"Start smartdns server.\n"
-		"  -f            run forground.\n"
-		"  -c [conf]     config file.\n"
-		"  -p [pid]      pid file path\n"
-		"  -S            ignore segment fault signal.\n"
-		"  -v            verbose screent.\n"
-		"  -h            show this help message.\n"
-
-		"Online help: http://pymumu.github.io/smartdns\n"
-		"Copyright (C) Nick Peng <pymumu@gmail.com>\n"
-		;
-	/* clang-format on */
-	printf("%s", help);
-}
-
-int smartdns_load_from_resolv(void)
-{
-	FILE *fp = NULL;
-	char line[MAX_LINE_LEN];
-	char key[MAX_KEY_LEN];
-	char value[MAX_LINE_LEN];
-	char ns_ip[DNS_MAX_IPLEN];
-	int port = PORT_NOT_DEFINED;
-	int ret = -1;
-
-	int filed_num = 0;
-	int line_num = 0;
-
-	fp = fopen(RESOLVE_FILE, "r");
-	if (fp == NULL) {
-		tlog(TLOG_ERROR, "open %s failed, %s", RESOLVE_FILE, strerror(errno));
-		return -1;
-	}
-
-	while (fgets(line, MAX_LINE_LEN, fp)) {
-		line_num++;
-		filed_num = sscanf(line, "%63s %1023[^\r\n]s", key, value);
-
-		if (filed_num != 2) {
-			continue;
-		}
-
-		if (strncmp(key, "nameserver", MAX_KEY_LEN) != 0) {
-			continue;
-		}
-
-		if (parse_ip(value, ns_ip, &port) != 0) {
-			continue;
-		}
-
-		if (port == PORT_NOT_DEFINED) {
-			port = DEFAULT_DNS_PORT;
-		}
-
-		strncpy(dns_conf_servers[dns_conf_server_num].server, ns_ip, DNS_MAX_IPLEN);
-		dns_conf_servers[dns_conf_server_num].port = port;
-		dns_conf_servers[dns_conf_server_num].type = DNS_SERVER_UDP;
-		dns_conf_server_num++;
-		ret = 0;
-	}
-
-	fclose(fp);
-
-	return ret;
-}
-
-int smartdns_add_servers(void)
-{
-	int i = 0;
-	int ret = 0;
-	for (i = 0; i < dns_conf_server_num; i++) {
-		ret = dns_add_server(dns_conf_servers[i].server, dns_conf_servers[i].port, dns_conf_servers[i].type, dns_conf_servers[i].result_flag,
-							 dns_conf_servers[i].ttl);
-		if (ret != 0) {
-			tlog(TLOG_ERROR, "add server failed, %s:%d", dns_conf_servers[i].server, dns_conf_servers[i].port);
-			return -1;
-		}
-	}
-
-	return 0;
-}
-
-int smartdns_set_ecs_ip(void)
-{
-	int ret = 0;
-	if (dns_conf_ipv4_ecs.enable) {
-		ret |= dns_client_set_ecs(dns_conf_ipv4_ecs.ip, dns_conf_ipv4_ecs.subnet);
-	}
-
-	if (dns_conf_ipv6_ecs.enable) {
-		ret |= dns_client_set_ecs(dns_conf_ipv6_ecs.ip, dns_conf_ipv6_ecs.subnet);
-	}
-
-	return ret;
-}
-
-int create_pid_file(const char *pid_file)
-{
-	int fd;
-	int flags;
-	char buff[TMP_BUFF_LEN_32];
-
-	/*  create pid file, and lock this file */
-	fd = open(pid_file, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
-	if (fd == -1) {
-		fprintf(stderr, "create pid file failed, %s\n", strerror(errno));
-		return -1;
-	}
-
-	flags = fcntl(fd, F_GETFD);
-	if (flags < 0) {
-		fprintf(stderr, "Could not get flags for PID file %s\n", pid_file);
-		goto errout;
-	}
-
-	flags |= FD_CLOEXEC;
-	if (fcntl(fd, F_SETFD, flags) == -1) {
-		fprintf(stderr, "Could not set flags for PID file %s\n", pid_file);
-		goto errout;
-	}
-
-	if (lockf(fd, F_TLOCK, 0) < 0) {
-		fprintf(stderr, "Server is already running.\n");
-		goto errout;
-	}
-
-	snprintf(buff, TMP_BUFF_LEN_32, "%d\n", getpid());
-
-	if (write(fd, buff, strnlen(buff, TMP_BUFF_LEN_32)) < 0) {
-		fprintf(stderr, "write pid to file failed, %s.\n", strerror(errno));
-		goto errout;
-	}
-
-	return 0;
-errout:
-	if (fd > 0) {
-		close(fd);
-	}
-	return -1;
-}
-
-int smartdns_init_ssl(void)
-{
-	SSL_load_error_strings();
-	SSL_library_init();
-	OpenSSL_add_all_algorithms();
-	SSL_CRYPTO_thread_setup();
-
-	return 0;
-}
-
-int smartdns_destroy_ssl(void)
-{
-	SSL_CRYPTO_thread_cleanup();
-	ERR_free_strings();
-	EVP_cleanup();
-
-	return 0;
-}
-
-int smartdns_init(void)
-{
-	int ret;
-	char *logfile = SMARTDNS_LOG_FILE;
-
-	if (dns_conf_log_file[0] != 0) {
-		logfile = dns_conf_log_file;
-	}
-
-	ret = tlog_init(logfile, dns_conf_log_size, dns_conf_log_num, 1, 0, 0);
-	if (ret != 0) {
-		tlog(TLOG_ERROR, "start tlog failed.\n");
-		goto errout;
-	}
-
-	tlog_setlogscreen(verbose_screen);
-	tlog_setlevel(dns_conf_log_level);
-
-	tlog(TLOG_NOTICE, "smartdns starting...(Copyright (C) Nick Peng <pymumu@gmail.com>, build:%s %s)", __DATE__, __TIME__);
-
-	if (smartdns_init_ssl() != 0) {
-		tlog(TLOG_ERROR, "init ssl failed.");
-		goto errout;
-	}
-
-	if (dns_conf_server_num <= 0) {
-		if (smartdns_load_from_resolv() != 0) {
-			tlog(TLOG_ERROR, "load dns from resolv failed.");
-			goto errout;
-		}
-	}
-
-	ret = fast_ping_init();
-	if (ret != 0) {
-		tlog(TLOG_ERROR, "start ping failed.\n");
-		goto errout;
-	}
-
-	ret = dns_server_init();
-	if (ret != 0) {
-		tlog(TLOG_ERROR, "start dns server failed.\n");
-		goto errout;
-	}
-
-	ret = dns_client_init();
-	if (ret != 0) {
-		tlog(TLOG_ERROR, "start dns client failed.\n");
-		goto errout;
-	}
-	ret = smartdns_add_servers();
-	if (ret != 0) {
-		tlog(TLOG_ERROR, "add servers failed.");
-		goto errout;
-	}
-
-	ret = smartdns_set_ecs_ip();
-	if (ret != 0) {
-		tlog(TLOG_WARN, "set ecs ip address failed.");
-	}
-
-	return 0;
-errout:
-
-	return -1;
-}
-
-int smartdns_run(void)
-{
-	return dns_server_run();
-}
-
-void smartdns_exit(void)
-{
-	dns_server_exit();
-	dns_client_exit();
-	fast_ping_exit();
-	smartdns_destroy_ssl();
-	tlog_exit();
-	dns_server_load_exit();
-}
-
-void sig_exit(int signo)
-{
-	dns_server_stop();
-}
-
-void sig_error_exit(int signo, siginfo_t *siginfo, void *ct)
-{
-	unsigned long PC = 0;
-	ucontext_t *context = ct;
-#if defined(__i386__)
-		int *pgregs = (int*)(&(context->uc_mcontext.gregs));
-		PC = pgregs[REG_EIP];
-#elif defined(__x86_64__) 
-		int *pgregs = (int*)(&(context->uc_mcontext.gregs));
-		PC = pgregs[REG_RIP];
-#elif defined(__aarch64__) || defined(__arm__)
-		PC = context->uc_mcontext.arm_pc;
-#elif defined(__mips__)
-		PC = context->uc_mcontext.pc;
-#endif
-	tlog(TLOG_ERROR, "process exit with signal %d, code = %d, errno = %d, pid = %d, self = %d, pc = %#lx, addr = %#lx, build(%s %s)\n", signo, siginfo->si_code, siginfo->si_errno,
-		 siginfo->si_pid, getpid(), PC, (unsigned long)siginfo->si_addr, __DATE__, __TIME__);
-
-	sleep(1);
-	_exit(0);
-}
-
-int sig_list[] = {SIGSEGV, SIGABRT, SIGBUS, SIGILL, SIGFPE};
-
-int sig_num = sizeof(sig_list) / sizeof(int);
-
-void reg_signal(void)
-{
-	struct sigaction act, old;
-	int i = 0;
-	act.sa_sigaction = sig_error_exit;
-	sigemptyset(&act.sa_mask);
-	act.sa_flags = SA_RESTART | SA_SIGINFO;
-
-	for (i = 0; i < sig_num; i++) {
-		sigaction(sig_list[i], &act, &old);
-	}
-}
-
-int main(int argc, char *argv[])
-{
-	int ret;
-	int is_forground = 0;
-	int opt;
-	char config_file[MAX_LINE_LEN];
-	char pid_file[MAX_LINE_LEN];
-	int signal_ignore = 0;
-
-	strncpy(config_file, SMARTDNS_CONF_FILE, MAX_LINE_LEN);
-	strncpy(pid_file, SMARTDNS_PID_FILE, MAX_LINE_LEN);
-
-	while ((opt = getopt(argc, argv, "fhc:p:Sv")) != -1) {
-		switch (opt) {
-		case 'f':
-			is_forground = 1;
-			break;
-		case 'c':
-			snprintf(config_file, sizeof(config_file), "%s", optarg);
-			break;
-		case 'p':
-			snprintf(pid_file, sizeof(pid_file), "%s", optarg);
-			break;
-		case 'S':
-			signal_ignore = 1;
-			break;
-		case 'v':
-			verbose_screen = 1;
-			break;
-		case 'h':
-			help();
-			return 1;
-		}
-	}
-
-	if (is_forground == 0) {
-		if (daemon(0, 0) < 0) {
-			fprintf(stderr, "run daemon process failed, %s\n", strerror(errno));
-			return 1;
-		}
-	}
-
-	if (signal_ignore == 0) {
-		reg_signal();
-	}
-
-	if (dns_server_load_conf(config_file) != 0) {
-		fprintf(stderr, "load config failed.\n");
-		goto errout;
-	}
-
-	if (create_pid_file(pid_file) != 0) {
-		goto errout;
-	}
-
-	ret = smartdns_init();
-	if (ret != 0) {
-		usleep(100000);
-		goto errout;
-	}
-
-	signal(SIGINT, sig_exit);
-	signal(SIGPIPE, SIG_IGN);
-	atexit(smartdns_exit);
-
-	return smartdns_run();
-
-errout:
-
-	return 1;
-}
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define _GNU_SOURCE
+#include "art.h"
+#include "atomic.h"
+#include "dns_client.h"
+#include "dns_conf.h"
+#include "dns_server.h"
+#include "fast_ping.h"
+#include "hashtable.h"
+#include "list.h"
+#include "rbtree.h"
+#include "tlog.h"
+#include "util.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <libgen.h>
+#include <openssl/err.h>
+#include <openssl/ssl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <ucontext.h>
+
+#define RESOLVE_FILE "/etc/resolv.conf"
+#define MAX_LINE_LEN 1024
+#define MAX_KEY_LEN 64
+#define SMARTDNS_PID_FILE "/var/run/smartdns.pid"
+#define TMP_BUFF_LEN_32 32
+
+static int verbose_screen;
+
+static void _help(void)
+{
+	/* clang-format off */
+	char *help = ""
+		"Usage: smartdns [OPTION]...\n"
+		"Start smartdns server.\n"
+		"  -f            run forground.\n"
+		"  -c [conf]     config file.\n"
+		"  -p [pid]      pid file path\n"
+		"  -S            ignore segment fault signal.\n"
+		"  -x            verbose screen.\n"
+		"  -v            dispaly version.\n"
+		"  -h            show this help message.\n"
+
+		"Online help: http://pymumu.github.io/smartdns\n"
+		"Copyright (C) Nick Peng <pymumu@gmail.com>\n"
+		;
+	/* clang-format on */
+	printf("%s", help);
+}
+
+static void _show_version(void)
+{
+	char str_ver[256] = {0};
+#ifdef SMARTDNS_VERION
+	const char *ver = SMARTDNS_VERION;
+	snprintf(str_ver, sizeof(str_ver), "%s", ver);
+#else
+	struct tm tm;
+	get_compiled_time(&tm);
+	snprintf(str_ver, sizeof(str_ver), "1.%.4d%.2d%.2d-%.2d%.2d", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+			 tm.tm_hour, tm.tm_min);
+#endif
+	printf("smartdns %s\n", str_ver);
+}
+
+static int _smartdns_load_from_resolv(void)
+{
+	FILE *fp = NULL;
+	char line[MAX_LINE_LEN];
+	char key[MAX_KEY_LEN];
+	char value[MAX_LINE_LEN];
+	char ns_ip[DNS_MAX_IPLEN];
+	int port = PORT_NOT_DEFINED;
+	int ret = -1;
+
+	int filed_num = 0;
+	int line_num = 0;
+
+	fp = fopen(RESOLVE_FILE, "r");
+	if (fp == NULL) {
+		tlog(TLOG_ERROR, "open %s failed, %s", RESOLVE_FILE, strerror(errno));
+		return -1;
+	}
+
+	while (fgets(line, MAX_LINE_LEN, fp)) {
+		line_num++;
+		filed_num = sscanf(line, "%63s %1023[^\r\n]s", key, value);
+
+		if (filed_num != 2) {
+			continue;
+		}
+
+		if (strncmp(key, "nameserver", MAX_KEY_LEN) != 0) {
+			continue;
+		}
+
+		if (parse_ip(value, ns_ip, &port) != 0) {
+			continue;
+		}
+
+		if (port == PORT_NOT_DEFINED) {
+			port = DEFAULT_DNS_PORT;
+		}
+
+		safe_strncpy(dns_conf_servers[dns_conf_server_num].server, ns_ip, DNS_MAX_IPLEN);
+		dns_conf_servers[dns_conf_server_num].port = port;
+		dns_conf_servers[dns_conf_server_num].type = DNS_SERVER_UDP;
+		dns_conf_server_num++;
+		ret = 0;
+	}
+
+	fclose(fp);
+
+	return ret;
+}
+
+static int _smartdns_add_servers(void)
+{
+	int i = 0;
+	int j = 0;
+	int ret = 0;
+	struct dns_server_groups *group = NULL;
+	struct dns_servers *server = NULL;
+	struct client_dns_server_flags flags;
+
+	for (i = 0; i < dns_conf_server_num; i++) {
+		memset(&flags, 0, sizeof(flags));
+		switch (dns_conf_servers[i].type) {
+		case DNS_SERVER_UDP: {
+			struct client_dns_server_flag_udp *flag_udp = &flags.udp;
+			flag_udp->ttl = dns_conf_servers[i].ttl;
+		} break;
+		case DNS_SERVER_HTTPS: {
+			struct client_dns_server_flag_https *flag_http = &flags.https;
+			flag_http->spi_len = dns_client_spki_decode(dns_conf_servers[i].spki, (unsigned char *)flag_http->spki);
+			safe_strncpy(flag_http->hostname, dns_conf_servers[i].hostname, sizeof(flag_http->hostname));
+			safe_strncpy(flag_http->path, dns_conf_servers[i].path, sizeof(flag_http->path));
+			safe_strncpy(flag_http->httphost, dns_conf_servers[i].httphost, sizeof(flag_http->httphost));
+			safe_strncpy(flag_http->tls_host_verify, dns_conf_servers[i].tls_host_verify,
+						 sizeof(flag_http->tls_host_verify));
+			flag_http->skip_check_cert = dns_conf_servers[i].skip_check_cert;
+		} break;
+		case DNS_SERVER_TLS: {
+			struct client_dns_server_flag_tls *flag_tls = &flags.tls;
+			flag_tls->spi_len = dns_client_spki_decode(dns_conf_servers[i].spki, (unsigned char *)flag_tls->spki);
+			safe_strncpy(flag_tls->hostname, dns_conf_servers[i].hostname, sizeof(flag_tls->hostname));
+			safe_strncpy(flag_tls->tls_host_verify, dns_conf_servers[i].tls_host_verify,
+						 sizeof(flag_tls->tls_host_verify));
+			flag_tls->skip_check_cert = dns_conf_servers[i].skip_check_cert;
+
+		} break;
+		case DNS_SERVER_TCP:
+			break;
+		default:
+			return -1;
+			break;
+		}
+
+		flags.type = dns_conf_servers[i].type;
+		flags.server_flag = dns_conf_servers[i].server_flag;
+		flags.result_flag = dns_conf_servers[i].result_flag;
+		ret = dns_client_add_server(dns_conf_servers[i].server, dns_conf_servers[i].port, dns_conf_servers[i].type,
+									&flags);
+		if (ret != 0) {
+			tlog(TLOG_ERROR, "add server failed, %s:%d", dns_conf_servers[i].server, dns_conf_servers[i].port);
+			return -1;
+		}
+	}
+
+	hash_for_each(dns_group_table.group, i, group, node)
+	{
+		ret = dns_client_add_group(group->group_name);
+		if (ret != 0) {
+			tlog(TLOG_ERROR, "add group failed, %s", group->group_name);
+			return -1;
+		}
+
+		for (j = 0; j < group->server_num; j++) {
+			server = group->servers[j];
+			if (server == NULL) {
+				continue;
+			}
+			ret = dns_client_add_to_group(group->group_name, server->server, server->port, server->type);
+			if (ret != 0) {
+				tlog(TLOG_ERROR, "add server %s to group %s failed", server->server, group->group_name);
+				return -1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int _smartdns_set_ecs_ip(void)
+{
+	int ret = 0;
+	if (dns_conf_ipv4_ecs.enable) {
+		ret |= dns_client_set_ecs(dns_conf_ipv4_ecs.ip, dns_conf_ipv4_ecs.subnet);
+	}
+
+	if (dns_conf_ipv6_ecs.enable) {
+		ret |= dns_client_set_ecs(dns_conf_ipv6_ecs.ip, dns_conf_ipv6_ecs.subnet);
+	}
+
+	return ret;
+}
+
+static int _smartdns_init_ssl(void)
+{
+#if OPENSSL_API_COMPAT < 0x10100000L
+	SSL_load_error_strings();
+	SSL_library_init();
+	OpenSSL_add_all_algorithms();
+	SSL_CRYPTO_thread_setup();
+#endif
+	return 0;
+}
+
+static int _smartdns_destroy_ssl(void)
+{
+#if OPENSSL_API_COMPAT < 0x10100000L
+	SSL_CRYPTO_thread_cleanup();
+	ERR_free_strings();
+	EVP_cleanup();
+#endif
+	return 0;
+}
+
+static int _smartdns_init(void)
+{
+	int ret;
+	char *logfile = SMARTDNS_LOG_FILE;
+
+	if (dns_conf_log_file[0] != 0) {
+		logfile = dns_conf_log_file;
+	}
+
+	ret = tlog_init(logfile, dns_conf_log_size, dns_conf_log_num, 0, 0);
+	if (ret != 0) {
+		tlog(TLOG_ERROR, "start tlog failed.\n");
+		goto errout;
+	}
+
+	tlog_setlogscreen(verbose_screen);
+	tlog_setlevel(dns_conf_log_level);
+
+	tlog(TLOG_NOTICE, "smartdns starting...(Copyright (C) Nick Peng <pymumu@gmail.com>, build:%s %s)", __DATE__,
+		 __TIME__);
+
+	if (_smartdns_init_ssl() != 0) {
+		tlog(TLOG_ERROR, "init ssl failed.");
+		goto errout;
+	}
+
+	if (dns_conf_server_num <= 0) {
+		if (_smartdns_load_from_resolv() != 0) {
+			tlog(TLOG_ERROR, "load dns from resolv failed.");
+			goto errout;
+		}
+	}
+
+	ret = fast_ping_init();
+	if (ret != 0) {
+		tlog(TLOG_ERROR, "start ping failed.\n");
+		goto errout;
+	}
+
+	ret = dns_server_init();
+	if (ret != 0) {
+		tlog(TLOG_ERROR, "start dns server failed.\n");
+		goto errout;
+	}
+
+	ret = dns_client_init();
+	if (ret != 0) {
+		tlog(TLOG_ERROR, "start dns client failed.\n");
+		goto errout;
+	}
+	ret = _smartdns_add_servers();
+	if (ret != 0) {
+		tlog(TLOG_ERROR, "add servers failed.");
+		goto errout;
+	}
+
+	ret = _smartdns_set_ecs_ip();
+	if (ret != 0) {
+		tlog(TLOG_WARN, "set ecs ip address failed.");
+	}
+
+	return 0;
+errout:
+
+	return -1;
+}
+
+static int _smartdns_run(void)
+{
+	return dns_server_run();
+}
+
+static void _smartdns_exit(void)
+{
+	dns_server_exit();
+	dns_client_exit();
+	fast_ping_exit();
+	_smartdns_destroy_ssl();
+	tlog_exit();
+	dns_server_load_exit();
+}
+
+static void _sig_exit(int signo)
+{
+	dns_server_stop();
+}
+
+static void _sig_error_exit(int signo, siginfo_t *siginfo, void *ct)
+{
+	unsigned long PC = 0;
+	ucontext_t *context = ct;
+	const char *arch = NULL;
+#if defined(__i386__)
+	int *pgregs = (int *)(&(context->uc_mcontext.gregs));
+	PC = pgregs[REG_EIP];
+	arch = "i386";
+#elif defined(__x86_64__)
+	int *pgregs = (int *)(&(context->uc_mcontext.gregs));
+	PC = pgregs[REG_RIP];
+	arch = "x86_64";
+#elif defined(__arm__)
+	PC = context->uc_mcontext.arm_pc;
+	arch = "arm";
+#elif defined(__aarch64__)
+	PC = context->uc_mcontext.pc;
+	arch = "arm64";
+#elif defined(__mips__)
+	PC = context->uc_mcontext.pc;
+	arch = "mips";
+#endif
+	tlog(TLOG_FATAL,
+		 "process exit with signal %d, code = %d, errno = %d, pid = %d, self = %d, pc = %#lx, addr = %#lx, build(%s "
+		 "%s %s)\n",
+		 signo, siginfo->si_code, siginfo->si_errno, siginfo->si_pid, getpid(), PC, (unsigned long)siginfo->si_addr,
+		 __DATE__, __TIME__, arch);
+
+	sleep(1);
+	_exit(0);
+}
+
+static int sig_list[] = {SIGSEGV, SIGABRT, SIGBUS, SIGILL, SIGFPE};
+
+static int sig_num = sizeof(sig_list) / sizeof(int);
+
+static void _reg_signal(void)
+{
+	struct sigaction act, old;
+	int i = 0;
+	act.sa_sigaction = _sig_error_exit;
+	sigemptyset(&act.sa_mask);
+	act.sa_flags = SA_RESTART | SA_SIGINFO;
+
+	for (i = 0; i < sig_num; i++) {
+		sigaction(sig_list[i], &act, &old);
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	int ret;
+	int is_forground = 0;
+	int opt;
+	char config_file[MAX_LINE_LEN];
+	char pid_file[MAX_LINE_LEN];
+	int signal_ignore = 0;
+
+	safe_strncpy(config_file, SMARTDNS_CONF_FILE, MAX_LINE_LEN);
+	safe_strncpy(pid_file, SMARTDNS_PID_FILE, MAX_LINE_LEN);
+
+	while ((opt = getopt(argc, argv, "fhc:p:Svx")) != -1) {
+		switch (opt) {
+		case 'f':
+			is_forground = 1;
+			break;
+		case 'c':
+			snprintf(config_file, sizeof(config_file), "%s", optarg);
+			break;
+		case 'p':
+			snprintf(pid_file, sizeof(pid_file), "%s", optarg);
+			break;
+		case 'S':
+			signal_ignore = 1;
+			break;
+		case 'x':
+			verbose_screen = 1;
+			break;
+		case 'v':
+			_show_version();
+			return 0;
+			break;
+		case 'h':
+			_help();
+			return 1;
+		}
+	}
+
+	if (is_forground == 0) {
+		if (daemon(0, 0) < 0) {
+			fprintf(stderr, "run daemon process failed, %s\n", strerror(errno));
+			return 1;
+		}
+	}
+
+	if (signal_ignore == 0) {
+		_reg_signal();
+	}
+
+	if (create_pid_file(pid_file) != 0) {
+		goto errout;
+	}
+
+	signal(SIGPIPE, SIG_IGN);
+	if (dns_server_load_conf(config_file) != 0) {
+		fprintf(stderr, "load config failed.\n");
+		goto errout;
+	}
+
+	ret = _smartdns_init();
+	if (ret != 0) {
+		usleep(100000);
+		goto errout;
+	}
+
+	signal(SIGINT, _sig_exit);
+	atexit(_smartdns_exit);
+
+	return _smartdns_run();
+
+errout:
+
+	return 1;
+}

src/tlog.h

@@ -1,6 +1,6 @@
 /*
  * tinylog
- * Copyright (C) 2018 Ruilin Peng (Nick) <pymumu@gmail.com>
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>
  * https://github.com/pymumu/tinylog
  */
 
@@ -9,6 +9,11 @@
 #include <stdarg.h>
 
 #ifdef __cplusplus
+#include <string>
+#include <memory>
+#include <sstream>
+#include <iostream>
+#include <functional>
 extern "C" {
 #endif /*__cplusplus */
 
@@ -24,21 +29,44 @@ typedef enum {
 
 struct tlog_time {
     int year;
-    int mon;
-    int mday;
-    int hour;
-    int min;
-    int sec;
-    int usec;
-};
+    unsigned int usec;
+    unsigned char mon;
+    unsigned char mday;
+    unsigned char hour;
+    unsigned char min;
+    unsigned char sec;
+} __attribute__((packed));
 
-struct tlog_info {
-    const char *level;
+#ifndef TLOG_MAX_LINE_LEN
+#define TLOG_MAX_LINE_LEN (1024)
+#endif
+
+/* TLOG FLAGS LIST */
+/* set tlog not compress file when archive */
+#define TLOG_NOCOMPRESS (1 << 0)
+
+/* Set the segmentation mode to process the log, Used by the callback function to return a full log*/
+#define TLOG_SEGMENT (1 << 1)
+
+/*
+ multiwrite: enable multi process write mode.
+            NOTICE: maxlogsize in all prcesses must be same when enable this mode.
+ */
+#define TLOG_MULTI_WRITE (1 << 2)
+
+/* Not Block if buffer is insufficient. */
+#define TLOG_NONBLOCK (1 << 3)
+
+/* enable log to screen */
+#define TLOG_SCREEN (1 << 4)
+
+struct tlog_loginfo {
+    tlog_level level;
     const char *file;
     const char *func;
     int line;
     struct tlog_time time;
-};
+} __attribute__((packed));
 
 /*
 Function: Print log
@@ -48,32 +76,39 @@ format: Log formats
 #ifndef BASE_FILE_NAME
 #define BASE_FILE_NAME __FILE__
 #endif
-#define tlog(level, format, ...) tlog_ext(level, BASE_FILE_NAME, __LINE__, __func__, 0, format, ##__VA_ARGS__)
+#define tlog(level, format, ...) tlog_ext(level, BASE_FILE_NAME, __LINE__, __func__, NULL, format, ##__VA_ARGS__)
 
 extern int tlog_ext(tlog_level level, const char *file, int line, const char *func, void *userptr, const char *format, ...)
-    __attribute__((format(printf, 6, 7)));
+    __attribute__((format(printf, 6, 7))) __attribute__((nonnull (6)));
 extern int tlog_vext(tlog_level level, const char *file, int line, const char *func, void *userptr, const char *format, va_list ap);
 
+/* write buff to log file */
+extern int tlog_write_log(char *buff, int bufflen);
+
 /* set log level */
 extern int tlog_setlevel(tlog_level level);
 
+/* get log level */
+extern tlog_level tlog_getlevel(void);
+
 /* enalbe log to screen */
 extern void tlog_setlogscreen(int enable);
 
 /* enalbe early log to screen */
 extern void tlog_set_early_printf(int enable);
 
+/* Get log level in string */
+extern const char *tlog_get_level_string(tlog_level level);
+
 /*
 Function: Initialize log module
 logfile: log file.
 maxlogsize: The maximum size of a single log file.
 maxlogcount: Number of archived logs.
-block: Blocked if buffer is not sufficient.
 buffsize: Buffer size, zero for default (128K)
-multiwrite: enable multi process write mode.
-            NOTICE: maxlogsize in all prcesses must be same when enable this mode.
+flag: read tlog flags
  */
-extern int tlog_init(const char *logfile, int maxlogsize, int maxlogcount, int block, int buffsize, int multiwrite);
+extern int tlog_init(const char *logfile, int maxlogsize, int maxlogcount, int buffsize, unsigned int flag);
 
 /* flush pending log message, and exit tlog */
 extern void tlog_exit(void);
@@ -86,9 +121,15 @@ steps:
 
 read _tlog_format for example.
 */
-typedef int (*tlog_format_func)(char *buff, int maxlen, struct tlog_info *info, void *userptr, const char *format, va_list ap);
+typedef int (*tlog_format_func)(char *buff, int maxlen, struct tlog_loginfo *info, void *userptr, const char *format, va_list ap);
 extern int tlog_reg_format_func(tlog_format_func func);
 
+/* register log output callback 
+ Note: info is invalid when flag TLOG_SEGMENT is not set.
+ */
+typedef int (*tlog_log_output_func)(struct tlog_loginfo *info, const char *buff, int bufflen, void *private_data);
+extern int tlog_reg_log_output_func(tlog_log_output_func output, void *private_data);
+
 struct tlog_log;
 typedef struct tlog_log tlog_log;
 /*
@@ -96,15 +137,16 @@ Function: open a new log stream, handler should close by tlog_close
 logfile: log file.
 maxlogsize: The maximum size of a single log file.
 maxlogcount: Number of archived logs.
-block: Blocked if buffer is not sufficient.
 buffsize: Buffer size, zero for default (128K)
-multiwrite: enable multi process write mode.
-            NOTICE: maxlogsize in all prcesses must be same when enable this mode.
-
+flag: read tlog flags
 return: log stream handler.
- */
-extern tlog_log *tlog_open(const char *logfile, int maxlogsize, int maxlogcount, int block, int buffsize, int multiwrite);
+*/
+extern tlog_log *tlog_open(const char *logfile, int maxlogsize, int maxlogcount, int buffsize, unsigned int flag);
 
+/* write buff to log file */
+extern int tlog_write(struct tlog_log *log, const char *buff, int bufflen);
+
+/* close log stream */
 extern void tlog_close(tlog_log *log);
 
 /*
@@ -112,7 +154,7 @@ Function: Print log to log stream
 log: log stream
 format: Log formats
 */
-extern int tlog_printf(tlog_log *log, const char *format, ...) __attribute__((format(printf, 2, 3)));
+extern int tlog_printf(tlog_log *log, const char *format, ...) __attribute__((format(printf, 2, 3))) __attribute__((nonnull (1, 2)));
 
 /*
 Function: Print log to log stream with ap
@@ -125,10 +167,79 @@ extern int tlog_vprintf(tlog_log *log, const char *format, va_list ap);
 /* enalbe log to screen */
 extern void tlog_logscreen(tlog_log *log, int enable);
 
+/* register output callback */
+typedef int (*tlog_output_func)(struct tlog_log *log, const char *buff, int bufflen);
+extern int tlog_reg_output_func(tlog_log *log, tlog_output_func output);
+
+/* set private data */
+extern void tlog_set_private(tlog_log *log, void *private_data);
+
+/* get private data */
+extern void *tlog_get_private(tlog_log *log);
+
 /* get local time */
 extern int tlog_localtime(struct tlog_time *tm);
 
 #ifdef __cplusplus
-}
-#endif /*__cplusplus */
+class Tlog {
+    using Stream = std::ostringstream;
+    using Buffer = std::unique_ptr<Stream, std::function<void(Stream*)>>;
+public:
+    Tlog(){}
+    ~Tlog(){}
+
+    static Tlog &Instance() {
+        static Tlog logger;
+        return logger;
+    }
+
+    Buffer LogStream(tlog_level level, const char *file, int line, const char *func, void *userptr) {
+        return Buffer(new Stream, [=](Stream *st) {
+            tlog_ext(level, file, line, func, userptr, "%s", st->str().c_str());
+            delete st;
+        });
+    }
+};
+
+class TlogOut {
+    using Stream = std::ostringstream;
+    using Buffer = std::unique_ptr<Stream, std::function<void(Stream*)>>;
+public:
+    TlogOut(){}
+    ~TlogOut(){}
+
+    static TlogOut &Instance() {
+        static TlogOut logger;
+        return logger;
+    }
+
+    Buffer Out(tlog_log *log) {
+        return Buffer(new Stream, [=](Stream *st) {
+            tlog_printf(log, "%s", st->str().c_str());
+            delete st;
+        });
+    }
+};
+
+#define Tlog_logger (Tlog::Instance())
+#define Tlog_stream(level) if (tlog_getlevel() <= level) *Tlog_logger.LogStream(level, BASE_FILE_NAME, __LINE__, __func__, NULL) 
+#define tlog_debug Tlog_stream(TLOG_DEBUG)
+#define tlog_info Tlog_stream(TLOG_INFO)
+#define tlog_notice Tlog_stream(TLOG_NOTICE)
+#define tlog_warn Tlog_stream(TLOG_WARN)
+#define tlog_error Tlog_stream(TLOG_ERROR)
+#define tlog_fatal Tlog_stream(TLOG_FATAL)
+
+#define Tlog_out_logger (TlogOut::Instance())
+#define tlog_out(stream)  (*Tlog_out_logger.Out(stream))
+
+} /*__cplusplus */
+#else
+#define tlog_debug(...) tlog(TLOG_DEBUG, ##__VA_ARGS__)
+#define tlog_info(...) tlog(TLOG_INFO, ##__VA_ARGS__)
+#define tlog_notice(...) tlog(TLOG_NOTICE, ##__VA_ARGS__)
+#define tlog_warn(...) tlog(TLOG_WARN, ##__VA_ARGS__)
+#define tlog_error(...) tlog(TLOG_ERROR, ##__VA_ARGS__)
+#define tlog_fatal(...) tlog(TLOG_FATAL, ##__VA_ARGS__)
+#endif 
 #endif // !TLOG_H

src/util.c

@@ -1,16 +1,45 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
 #include "util.h"
 #include "dns_conf.h"
 #include <arpa/inet.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <inttypes.h>
+#include <linux/capability.h>
 #include <linux/netlink.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
+#include <netinet/tcp.h>
 #include <openssl/crypto.h>
 #include <openssl/ssl.h>
 #include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/prctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#define TMP_BUFF_LEN_32 32
 
 #define NFNL_SUBSYS_IPSET 6
 
@@ -57,6 +86,7 @@ struct ipset_netlink_msg {
 };
 
 static int ipset_fd;
+static int pidfile_fd;
 
 unsigned long get_tick_count(void)
 {
@@ -67,7 +97,7 @@ unsigned long get_tick_count(void)
 	return (ts.tv_sec * 1000 + ts.tv_nsec / 1000000);
 }
 
-char *gethost_by_addr(char *host, struct sockaddr *addr, socklen_t addr_len)
+char *gethost_by_addr(char *host, int maxsize, struct sockaddr *addr)
 {
 	struct sockaddr_storage *addr_store = (struct sockaddr_storage *)addr;
 	host[0] = 0;
@@ -75,7 +105,7 @@ char *gethost_by_addr(char *host, struct sockaddr *addr, socklen_t addr_len)
 	case AF_INET: {
 		struct sockaddr_in *addr_in;
 		addr_in = (struct sockaddr_in *)addr;
-		inet_ntop(AF_INET, &addr_in->sin_addr, host, addr_len);
+		inet_ntop(AF_INET, &addr_in->sin_addr, host, maxsize);
 	} break;
 	case AF_INET6: {
 		struct sockaddr_in6 *addr_in6;
@@ -84,9 +114,9 @@ char *gethost_by_addr(char *host, struct sockaddr *addr, socklen_t addr_len)
 			struct sockaddr_in addr_in4;
 			memset(&addr_in4, 0, sizeof(addr_in4));
 			memcpy(&addr_in4.sin_addr.s_addr, addr_in6->sin6_addr.s6_addr + 12, sizeof(addr_in4.sin_addr.s_addr));
-			inet_ntop(AF_INET, &addr_in4.sin_addr, host, addr_len);
+			inet_ntop(AF_INET, &addr_in4.sin_addr, host, maxsize);
 		} else {
-			inet_ntop(AF_INET6, &addr_in6->sin6_addr, host, addr_len);
+			inet_ntop(AF_INET6, &addr_in6->sin6_addr, host, maxsize);
 		}
 	} break;
 	default:
@@ -117,6 +147,7 @@ int getaddr_by_host(char *host, struct sockaddr *addr, socklen_t *addr_len)
 		result->ai_addrlen = *addr_len;
 	}
 
+	addr->sa_family = result->ai_family;
 	memcpy(addr, result->ai_addr, result->ai_addrlen);
 	*addr_len = result->ai_addrlen;
 
@@ -130,6 +161,75 @@ errout:
 	return -1;
 }
 
+int getsocknet_inet(int fd, struct sockaddr *addr, socklen_t *addr_len)
+{
+	struct sockaddr_storage addr_store;
+	socklen_t addr_store_len = sizeof(addr_store);
+	if (getsockname(fd, (struct sockaddr *)&addr_store, &addr_store_len) != 0) {
+		goto errout;
+	}
+
+	switch (addr_store.ss_family) {
+	case AF_INET: {
+		struct sockaddr_in *addr_in;
+		addr_in = (struct sockaddr_in *)addr;
+		addr_in->sin_family = AF_INET;
+		*addr_len = sizeof(struct sockaddr_in);
+		memcpy(addr, addr_in, sizeof(struct sockaddr_in));
+	} break;
+	case AF_INET6: {
+		struct sockaddr_in6 *addr_in6;
+		addr_in6 = (struct sockaddr_in6 *)addr;
+		if (IN6_IS_ADDR_V4MAPPED(&addr_in6->sin6_addr)) {
+			struct sockaddr_in addr_in4;
+			memset(&addr_in4, 0, sizeof(addr_in4));
+			memcpy(&addr_in4.sin_addr.s_addr, addr_in6->sin6_addr.s6_addr + 12, sizeof(addr_in4.sin_addr.s_addr));
+			addr_in4.sin_family = AF_INET;
+			addr_in4.sin_port = 0;
+			*addr_len = sizeof(struct sockaddr_in);
+			memcpy(addr, &addr_in4, sizeof(struct sockaddr_in));
+		} else {
+			addr_in6->sin6_family = AF_INET6;
+			*addr_len = sizeof(struct sockaddr_in6);
+			memcpy(addr, addr_in6, sizeof(struct sockaddr_in6));
+		}
+	} break;
+	default:
+		goto errout;
+		break;
+	}
+	return 0;
+errout:
+	return -1;
+}
+
+int fill_sockaddr_by_ip(unsigned char *ip, int ip_len, int port, struct sockaddr *addr, socklen_t *addr_len)
+{
+	if (ip == NULL || addr == NULL || addr_len == NULL) {
+		return -1;
+	}
+
+	if (ip_len == IPV4_ADDR_LEN) {
+		struct sockaddr_in *addr_in = NULL;
+		addr->sa_family = AF_INET;
+		addr_in = (struct sockaddr_in *)addr;
+		addr_in->sin_port = htons(port);
+		addr_in->sin_family = AF_INET;
+		memcpy(&addr_in->sin_addr.s_addr, ip, ip_len);
+		*addr_len = 16;
+	} else if (ip_len == IPV6_ADDR_LEN) {
+		struct sockaddr_in6 *addr_in6 = NULL;
+		addr->sa_family = AF_INET6;
+		addr_in6 = (struct sockaddr_in6 *)addr;
+		addr_in6->sin6_port = htons(port);
+		addr_in6->sin6_family = AF_INET6;
+		memcpy(addr_in6->sin6_addr.s6_addr, ip, ip_len);
+		*addr_len = 28;
+	}
+
+	return -1;
+}
+
 int parse_ip(const char *value, char *ip, int *port)
 {
 	int offset = 0;
@@ -185,6 +285,145 @@ int parse_ip(const char *value, char *ip, int *port)
 	return 0;
 }
 
+static int _check_is_ipv4(const char *ip)
+{
+	const char *ptr = ip;
+	char c = 0;
+	int dot_num = 0;
+	int dig_num = 0;
+
+	while ((c = *ptr++) != '\0') {
+		if (c == '.') {
+			dot_num++;
+			dig_num = 0;
+			continue;
+		}
+
+		/* check number count of one field */
+		if (dig_num >= 4) {
+			return -1;
+		}
+
+		if (c >= '0' && c <= '9') {
+			dig_num++;
+			continue;
+		}
+
+		return -1;
+	}
+
+	/* check field number */
+	if (dot_num != 3) {
+		return -1;
+	}
+
+	return 0;
+}
+static int _check_is_ipv6(const char *ip)
+{
+	const char *ptr = ip;
+	char c = 0;
+	int colon_num = 0;
+	int dig_num = 0;
+
+	while ((c = *ptr++) != '\0') {
+		if (c == '[' || c == ']') {
+			continue;
+		}
+
+		if (c == ':') {
+			colon_num++;
+			dig_num = 0;
+			continue;
+		}
+
+		/* check number count of one field */
+		if (dig_num >= 5) {
+			return -1;
+		}
+
+		dig_num++;
+		if (c >= '0' && c <= '9') {
+			continue;
+		}
+
+		if (c >= 'a' && c <= 'f') {
+			continue;
+		}
+
+		if (c >= 'A' && c <= 'F') {
+			continue;
+		}
+
+		return -1;
+	}
+
+	/* check field number */
+	if (colon_num > 7) {
+		return -1;
+	}
+
+	return 0;
+}
+int check_is_ipaddr(const char *ip)
+{
+	if (strstr(ip, ".")) {
+		/* IPV4 */
+		return _check_is_ipv4(ip);
+	} else if (strstr(ip, ":")) {
+		/* IPV6 */
+		return _check_is_ipv6(ip);
+	}
+	return -1;
+}
+
+int parse_uri(char *value, char *scheme, char *host, int *port, char *path)
+{
+	char *scheme_end = NULL;
+	int field_len = 0;
+	char *process_ptr = value;
+	char host_name[PATH_MAX];
+
+	char *host_end = NULL;
+
+	scheme_end = strstr(value, "://");
+	if (scheme_end) {
+		field_len = scheme_end - value;
+		if (scheme) {
+			memcpy(scheme, value, field_len);
+			scheme[field_len] = 0;
+		}
+		process_ptr += field_len + 3;
+	} else {
+		if (scheme) {
+			scheme[0] = '\0';
+		}
+	}
+
+	host_end = strstr(process_ptr, "/");
+	if (host_end == NULL) {
+		return parse_ip(process_ptr, host, port);
+	};
+
+	field_len = host_end - process_ptr;
+	if (field_len >= sizeof(host_name)) {
+		return -1;
+	}
+	memcpy(host_name, process_ptr, field_len);
+	host_name[field_len] = 0;
+
+	if (parse_ip(host_name, host, port) != 0) {
+		return -1;
+	}
+
+	process_ptr += field_len;
+
+	if (path) {
+		strncpy(path, process_ptr, PATH_MAX);
+	}
+	return 0;
+}
+
 int set_fd_nonblock(int fd, int nonblock)
 {
 	int ret;
@@ -203,7 +442,7 @@ int set_fd_nonblock(int fd, int nonblock)
 	return 0;
 }
 
-char *reverse_string(char *output, char *input, int len)
+char *reverse_string(char *output, const char *input, int len, int to_lower_case)
 {
 	char *begin = output;
 	if (len <= 0) {
@@ -214,6 +453,12 @@ char *reverse_string(char *output, char *input, int len)
 	len--;
 	while (len >= 0) {
 		*output = *(input + len);
+		if (to_lower_case) {
+			if (*output >= 'A' && *output <= 'Z') {
+				/* To lower case */
+				*output = *output + 32;
+			}
+		}
 		output++;
 		len--;
 	}
@@ -248,16 +493,17 @@ static int _ipset_socket_init(void)
 	return 0;
 }
 
-static int _ipset_support_timeout(const char *ipsetname) 
+static int _ipset_support_timeout(const char *ipsetname)
 {
 	if (dns_conf_ipset_timeout_enable) {
 		return 0;
 	}
-	
+
 	return -1;
 }
 
-static int _ipset_operate(const char *ipsetname, const unsigned char addr[], int addr_len, unsigned long timeout, int operate)
+static int _ipset_operate(const char *ipsetname, const unsigned char addr[], int addr_len, unsigned long timeout,
+						  int operate)
 {
 	struct nlmsghdr *netlink_head;
 	struct ipset_netlink_msg *netlink_msg;
@@ -315,7 +561,9 @@ static int _ipset_operate(const char *ipsetname, const unsigned char addr[], int
 	netlink_head->nlmsg_len += NETLINK_ALIGN(sizeof(struct ipset_netlink_attr));
 	nested[1]->type = NLA_F_NESTED | IPSET_ATTR_IP;
 
-	_ipset_add_attr(netlink_head, (af == AF_INET ? IPSET_ATTR_IPADDR_IPV4 : IPSET_ATTR_IPADDR_IPV6) | NLA_F_NET_BYTEORDER, addr_len, addr);
+	_ipset_add_attr(netlink_head,
+					(af == AF_INET ? IPSET_ATTR_IPADDR_IPV4 : IPSET_ATTR_IPADDR_IPV6) | NLA_F_NET_BYTEORDER, addr_len,
+					addr);
 	nested[1]->len = (void *)buffer + NETLINK_ALIGN(netlink_head->nlmsg_len) - (void *)nested[1];
 
 	if (timeout > 0 && _ipset_support_timeout(ipsetname) == 0) {
@@ -326,7 +574,7 @@ static int _ipset_operate(const char *ipsetname, const unsigned char addr[], int
 	nested[0]->len = (void *)buffer + NETLINK_ALIGN(netlink_head->nlmsg_len) - (void *)nested[0];
 
 	for (;;) {
-		rc = sendto(ipset_fd, buffer, netlink_head->nlmsg_len, 0, (struct sockaddr *)&snl, sizeof(snl));
+		rc = sendto(ipset_fd, buffer, netlink_head->nlmsg_len, 0, (const struct sockaddr *)&snl, sizeof(snl));
 		if (rc >= 0) {
 			break;
 		}
@@ -353,60 +601,397 @@ int ipset_del(const char *ipsetname, const unsigned char addr[], int addr_len)
 	return _ipset_operate(ipsetname, addr, addr_len, 0, IPSET_DEL);
 }
 
-#define THREAD_STACK_SIZE (16*1024)
+unsigned char *SSL_SHA256(const unsigned char *d, size_t n, unsigned char *md)
+{
+	SHA256_CTX c;
+	static unsigned char m[SHA256_DIGEST_LENGTH];
+
+	if (md == NULL)
+		md = m;
+	SHA256_Init(&c);
+	SHA256_Update(&c, d, n);
+	SHA256_Final(md, &c);
+	OPENSSL_cleanse(&c, sizeof(c));
+	return (md);
+}
+
+int SSL_base64_decode(const char *in, unsigned char *out)
+{
+	size_t inlen = strlen(in);
+	int outlen;
+
+	if (inlen == 0) {
+		return 0;
+	}
+
+	outlen = EVP_DecodeBlock(out, (unsigned char *)in, inlen);
+	if (outlen < 0) {
+		goto errout;
+	}
+
+	/* Subtract padding bytes from |outlen| */
+	while (in[--inlen] == '=') {
+		--outlen;
+	}
+
+	return outlen;
+errout:
+	return -1;
+}
+
+int create_pid_file(const char *pid_file)
+{
+	int fd;
+	int flags;
+	char buff[TMP_BUFF_LEN_32];
+
+	/*  create pid file, and lock this file */
+	fd = open(pid_file, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
+	if (fd == -1) {
+		fprintf(stderr, "create pid file failed, %s\n", strerror(errno));
+		return -1;
+	}
+
+	flags = fcntl(fd, F_GETFD);
+	if (flags < 0) {
+		fprintf(stderr, "Could not get flags for PID file %s\n", pid_file);
+		goto errout;
+	}
+
+	flags |= FD_CLOEXEC;
+	if (fcntl(fd, F_SETFD, flags) == -1) {
+		fprintf(stderr, "Could not set flags for PID file %s\n", pid_file);
+		goto errout;
+	}
+
+	if (lockf(fd, F_TLOCK, 0) < 0) {
+		fprintf(stderr, "Server is already running.\n");
+		goto errout;
+	}
+
+	snprintf(buff, TMP_BUFF_LEN_32, "%d\n", getpid());
+
+	if (write(fd, buff, strnlen(buff, TMP_BUFF_LEN_32)) < 0) {
+		fprintf(stderr, "write pid to file failed, %s.\n", strerror(errno));
+		goto errout;
+	}
+
+	if (pidfile_fd > 0) {
+		close(pidfile_fd);
+	}
+
+	pidfile_fd = fd;
+
+	return 0;
+errout:
+	if (fd > 0) {
+		close(fd);
+	}
+	return -1;
+}
+
+#if OPENSSL_API_COMPAT < 0x10100000
+#define THREAD_STACK_SIZE (16 * 1024)
 static pthread_mutex_t *lock_cs;
 static long *lock_count;
 
-void pthreads_locking_callback(int mode, int type, const char *file, int line)
+static __attribute__((unused)) void _pthreads_locking_callback(int mode, int type, const char *file, int line)
 {
-    if (mode & CRYPTO_LOCK) {
-        pthread_mutex_lock(&(lock_cs[type]));
-        lock_count[type]++;
-    } else {
-        pthread_mutex_unlock(&(lock_cs[type]));
-    }
+	if (mode & CRYPTO_LOCK) {
+		pthread_mutex_lock(&(lock_cs[type]));
+		lock_count[type]++;
+	} else {
+		pthread_mutex_unlock(&(lock_cs[type]));
+	}
 }
 
-unsigned long pthreads_thread_id(void)
+static __attribute__((unused)) unsigned long _pthreads_thread_id(void)
 {
-    unsigned long ret;
+	unsigned long ret;
 
-    ret = (unsigned long)pthread_self();
-    return (ret);
+	ret = (unsigned long)pthread_self();
+	return (ret);
 }
 
 void SSL_CRYPTO_thread_setup(void)
 {
-    int i;
+	int i;
 
-    lock_cs = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t));
-    lock_count = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(long));
-    if (!lock_cs || !lock_count) {
-        /* Nothing we can do about this...void function! */
-        if (lock_cs)
-            OPENSSL_free(lock_cs);
-        if (lock_count)
-            OPENSSL_free(lock_count);
-        return;
-    }
-    for (i = 0; i < CRYPTO_num_locks(); i++) {
-        lock_count[i] = 0;
-        pthread_mutex_init(&(lock_cs[i]), NULL);
-    }
+	lock_cs = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t));
+	lock_count = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(long));
+	if (!lock_cs || !lock_count) {
+		/* Nothing we can do about this...void function! */
+		if (lock_cs)
+			OPENSSL_free(lock_cs);
+		if (lock_count)
+			OPENSSL_free(lock_count);
+		return;
+	}
+	for (i = 0; i < CRYPTO_num_locks(); i++) {
+		lock_count[i] = 0;
+		pthread_mutex_init(&(lock_cs[i]), NULL);
+	}
 
-    CRYPTO_set_id_callback(pthreads_thread_id);
-    CRYPTO_set_locking_callback(pthreads_locking_callback);
+	CRYPTO_set_id_callback(_pthreads_thread_id);
+	CRYPTO_set_locking_callback(_pthreads_locking_callback);
 }
 
 void SSL_CRYPTO_thread_cleanup(void)
 {
-    int i;
+	int i;
 
-    CRYPTO_set_locking_callback(NULL);
-    for (i = 0; i < CRYPTO_num_locks(); i++) {
-        pthread_mutex_destroy(&(lock_cs[i]));
-    }
-    OPENSSL_free(lock_cs);
-    OPENSSL_free(lock_count);
+	CRYPTO_set_locking_callback(NULL);
+	for (i = 0; i < CRYPTO_num_locks(); i++) {
+		pthread_mutex_destroy(&(lock_cs[i]));
+	}
+	OPENSSL_free(lock_cs);
+	OPENSSL_free(lock_count);
+}
+#endif
+
+#define SERVER_NAME_LEN 256
+#define TLS_HEADER_LEN 5
+#define TLS_HANDSHAKE_CONTENT_TYPE 0x16
+#define TLS_HANDSHAKE_TYPE_CLIENT_HELLO 0x01
+#ifndef MIN
+#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#endif
+
+static int parse_extensions(const char *, size_t, char *, const char **);
+static int parse_server_name_extension(const char *, size_t, char *, const char **);
+
+/* Parse a TLS packet for the Server Name Indication extension in the client
+ * hello handshake, returning the first servername found (pointer to static
+ * array)
+ *
+ * Returns:
+ *  >=0  - length of the hostname and updates *hostname
+ *         caller is responsible for freeing *hostname
+ *  -1   - Incomplete request
+ *  -2   - No Host header included in this request
+ *  -3   - Invalid hostname pointer
+ *  -4   - malloc failure
+ *  < -4 - Invalid TLS client hello
+ */
+int parse_tls_header(const char *data, size_t data_len, char *hostname, const char **hostname_ptr)
+{
+	char tls_content_type;
+	char tls_version_major;
+	char tls_version_minor;
+	size_t pos = TLS_HEADER_LEN;
+	size_t len;
+
+	if (hostname == NULL)
+		return -3;
+
+	/* Check that our TCP payload is at least large enough for a TLS header */
+	if (data_len < TLS_HEADER_LEN)
+		return -1;
+
+	/* SSL 2.0 compatible Client Hello
+	 *
+	 * High bit of first byte (length) and content type is Client Hello
+	 *
+	 * See RFC5246 Appendix E.2
+	 */
+	if (data[0] & 0x80 && data[2] == 1) {
+		return -2;
+	}
+
+	tls_content_type = data[0];
+	if (tls_content_type != TLS_HANDSHAKE_CONTENT_TYPE) {
+		return -5;
+	}
+
+	tls_version_major = data[1];
+	tls_version_minor = data[2];
+	if (tls_version_major < 3) {
+		return -2;
+	}
+
+	/* TLS record length */
+	len = ((unsigned char)data[3] << 8) + (unsigned char)data[4] + TLS_HEADER_LEN;
+	data_len = MIN(data_len, len);
+
+	/* Check we received entire TLS record length */
+	if (data_len < len)
+		return -1;
+
+	/*
+	 * Handshake
+	 */
+	if (pos + 1 > data_len) {
+		return -5;
+	}
+	if (data[pos] != TLS_HANDSHAKE_TYPE_CLIENT_HELLO) {
+		return -5;
+	}
+
+	/* Skip past fixed length records:
+	 * 1	Handshake Type
+	 * 3	Length
+	 * 2	Version (again)
+	 * 32	Random
+	 * to	Session ID Length
+	 */
+	pos += 38;
+
+	/* Session ID */
+	if (pos + 1 > data_len)
+		return -5;
+	len = (unsigned char)data[pos];
+	pos += 1 + len;
+
+	/* Cipher Suites */
+	if (pos + 2 > data_len)
+		return -5;
+	len = ((unsigned char)data[pos] << 8) + (unsigned char)data[pos + 1];
+	pos += 2 + len;
+
+	/* Compression Methods */
+	if (pos + 1 > data_len)
+		return -5;
+	len = (unsigned char)data[pos];
+	pos += 1 + len;
+
+	if (pos == data_len && tls_version_major == 3 && tls_version_minor == 0) {
+		return -2;
+	}
+
+	/* Extensions */
+	if (pos + 2 > data_len)
+		return -5;
+	len = ((unsigned char)data[pos] << 8) + (unsigned char)data[pos + 1];
+	pos += 2;
+
+	if (pos + len > data_len)
+		return -5;
+	return parse_extensions(data + pos, len, hostname, hostname_ptr);
 }
 
+static int parse_extensions(const char *data, size_t data_len, char *hostname, const char **hostname_ptr)
+{
+	size_t pos = 0;
+	size_t len;
+
+	/* Parse each 4 bytes for the extension header */
+	while (pos + 4 <= data_len) {
+		/* Extension Length */
+		len = ((unsigned char)data[pos + 2] << 8) + (unsigned char)data[pos + 3];
+
+		/* Check if it's a server name extension */
+		if (data[pos] == 0x00 && data[pos + 1] == 0x00) {
+			/* There can be only one extension of each type, so we break
+			 * our state and move p to beinnging of the extension here */
+			if (pos + 4 + len > data_len)
+				return -5;
+			return parse_server_name_extension(data + pos + 4, len, hostname, hostname_ptr);
+		}
+		pos += 4 + len; /* Advance to the next extension header */
+	}
+	/* Check we ended where we expected to */
+	if (pos != data_len)
+		return -5;
+
+	return -2;
+}
+
+static int parse_server_name_extension(const char *data, size_t data_len, char *hostname, const char **hostname_ptr)
+{
+	size_t pos = 2; /* skip server name list length */
+	size_t len;
+
+	while (pos + 3 < data_len) {
+		len = ((unsigned char)data[pos + 1] << 8) + (unsigned char)data[pos + 2];
+
+		if (pos + 3 + len > data_len)
+			return -5;
+
+		switch (data[pos]) { /* name type */
+		case 0x00:           /* host_name */
+			strncpy(hostname, data + pos + 3, len);
+			if (hostname_ptr) {
+				*hostname_ptr = data + pos + 3;
+			}
+			hostname[len] = '\0';
+
+			return len;
+		default:
+			break;
+		}
+		pos += 3 + len;
+	}
+	/* Check we ended where we expected to */
+	if (pos != data_len)
+		return -5;
+
+	return -2;
+}
+
+void get_compiled_time(struct tm *tm)
+{
+	char s_month[5];
+	int month, day, year;
+	int hour, min, sec;
+	static const char *month_names = "JanFebMarAprMayJunJulAugSepOctNovDec";
+
+	sscanf(__DATE__, "%5s %d %d", s_month, &day, &year);
+	month = (strstr(month_names, s_month) - month_names) / 3;
+	sscanf(__TIME__, "%d:%d:%d", &hour, &min, &sec);
+	tm->tm_year = year - 1900;
+	tm->tm_mon = month;
+	tm->tm_mday = day;
+	tm->tm_isdst = -1;
+	tm->tm_hour = hour;
+	tm->tm_min = min;
+	tm->tm_sec = sec;
+}
+
+int is_numeric(const char *str)
+{
+	while (*str != '\0') {
+		if (*str < '0' || *str > '9')
+			return -1;
+		str++;
+	}
+	return 0;
+}
+
+int has_network_raw_cap(void)
+{
+	int fd = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
+	if (fd < 0) {
+		return 0;
+	}
+
+	close(fd);
+	return 1;
+}
+
+int set_sock_keepalive(int fd, int keepidle, int keepinterval, int keepcnt)
+{
+	const int yes = 1;
+	if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) != 0) {
+		return -1;
+	}
+
+	setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &keepidle, sizeof(keepidle));
+	setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &keepinterval, sizeof(keepinterval));
+	setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &keepcnt, sizeof(keepcnt));
+
+	return 0;
+}
+
+int set_sock_lingertime(int fd, int time)
+{
+	struct linger l;
+
+	l.l_onoff = 1;
+	l.l_linger = 0;
+
+	if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (const char *)&l, sizeof(l)) != 0) {
+		return -1;
+	}
+
+	return 0;
+}

src/util.h

@@ -1,24 +1,69 @@
-
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
+ *
+ * smartdns is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * smartdns is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #ifndef SMART_DNS_UTIL_H
 #define SMART_DNS_UTIL_H
 
+#include "stringutil.h"
 #include <netdb.h>
+#include <time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /*__cplusplus */
+
+#ifndef TCP_FASTOPEN
+#define TCP_FASTOPEN 23
+#endif
+
+#ifndef TCP_FASTOPEN_CONNECT
+#define TCP_FASTOPEN_CONNECT 30
+#endif
+#ifndef TCP_THIN_LINEAR_TIMEOUTS
+#define TCP_THIN_LINEAR_TIMEOUTS 16
+#endif
+
+#ifndef TCP_THIN_DUPACK
+#define TCP_THIN_DUPACK 17
+#endif
 
 #define PORT_NOT_DEFINED -1
 #define MAX_IP_LEN 64
 
 unsigned long get_tick_count(void);
 
-char *gethost_by_addr(char *host, struct sockaddr *addr, socklen_t addr_len);
+char *gethost_by_addr(char *host, int maxsize, struct sockaddr *addr);
 
 int getaddr_by_host(char *host, struct sockaddr *addr, socklen_t *addr_len);
 
+int getsocknet_inet(int fd, struct sockaddr *addr, socklen_t *addr_len);
+
+int fill_sockaddr_by_ip(unsigned char *ip, int ip_len, int port, struct sockaddr *addr, socklen_t *addr_len);
+
 int parse_ip(const char *value, char *ip, int *port);
 
+int check_is_ipaddr(const char *ip);
+
+int parse_uri(char *value, char *scheme, char *host, int *port, char *path);
+
 int set_fd_nonblock(int fd, int nonblock);
 
-char *reverse_string(char *output, char *input, int len);
+char *reverse_string(char *output, const char *input, int len, int to_lower_case);
 
 void print_stack(void);
 
@@ -30,4 +75,38 @@ void SSL_CRYPTO_thread_setup(void);
 
 void SSL_CRYPTO_thread_cleanup(void);
 
-#endif
+unsigned char *SSL_SHA256(const unsigned char *d, size_t n, unsigned char *md);
+
+int SSL_base64_decode(const char *in, unsigned char *out);
+
+int create_pid_file(const char *pid_file);
+
+/* Parse a TLS packet for the Server Name Indication extension in the client
+ * hello handshake, returning the first servername found (pointer to static
+ * array)
+ *
+ * Returns:
+ *  >=0  - length of the hostname and updates *hostname
+ *         caller is responsible for freeing *hostname
+ *  -1   - Incomplete request
+ *  -2   - No Host header included in this request
+ *  -3   - Invalid hostname pointer
+ *  -4   - malloc failure
+ *  < -4 - Invalid TLS client hello
+ */
+int parse_tls_header(const char *data, size_t data_len, char *hostname, const char **hostname_ptr);
+
+void get_compiled_time(struct tm *tm);
+
+int is_numeric(const char *str);
+
+int has_network_raw_cap(void);
+
+int set_sock_keepalive(int fd, int keepidle, int keepinterval, int keepcnt);
+
+int set_sock_lingertime(int fd, int time);
+
+#ifdef __cplusplus
+}
+#endif /*__cplusplus */
+#endif