luci: support proxy server settings.

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

@@ -269,6 +269,21 @@ msgstr "未运行"
 msgid "No check certificate"
 msgstr "停用证书校验"
 
+msgid "Please set proxy server first."
+msgstr "请先设置代理服务器。"
+
+msgid "Proxy Server"
+msgstr "代理服务器"
+
+msgid "Proxy Server URL, format: [socks5|http]://user:pass@ip:port."
+msgstr "代理服务器地址，格式：[socks5|http]://user:pass@ip:port。"
+
+msgid "Proxy server URL format error, format: [socks5|http]://user:pass@ip:port."
+msgstr "代理服务器地址格式错误，格式：[socks5|http]://user:pass@ip:port。"
+
+msgid "Proxy Server Settings"
+msgstr "代理服务器设置"
+
 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。"
 
@@ -431,6 +446,12 @@ msgstr "设置所有域名的 TTL 值。"
 msgid "Technical Support"
 msgstr "技术支持"
 
+msgid "Use Proxy"
+msgstr "使用代理"
+
+msgid "Use proxy to connect to upstream DNS server."
+msgstr "使用代理连接上游DNS服务器。"
+
 msgid "URL"
 msgstr "URL"
 

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

@@ -34,6 +34,7 @@ s.anonymous = true
 s:tab("settings", translate("General Settings"))
 s:tab("advanced", translate('Advanced Settings'))
 s:tab("seconddns", translate("Second Server Settings"))
+s:tab("proxy", translate("Proxy Server Settings"))
 s:tab("custom", translate("Custom Settings"))
 
 ---- Eanble
@@ -312,6 +313,21 @@ o.cfgvalue    = function(...)
     return Flag.cfgvalue(...) or "0"
 end
 
+----- Proxy server settings
+o = s:taboption("proxy", Value, "proxy_server", translate("Proxy Server"), translate("Proxy Server URL, format: [socks5|http]://user:pass@ip:port."));
+o.datatype = 'string';
+function o.validate(self, value)
+    if (value == "") then
+        return true
+    end
+
+    if (not value:match("^http://") and not value:match("^socks5://")) then
+        return nil, translate("Proxy server URL format error, format: [socks5|http]://user:pass@ip:port.")
+    end
+
+    return value
+end
+
 ----- custom settings
 custom = s:taboption("custom", Value, "Custom Settings",
 	translate(""), 

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

@@ -133,6 +133,23 @@ o.default     = ""
 o.rempty      = true
 o.datatype    = "uinteger"
 
+---- use proxy
+o = s:option(Flag, "use_proxy", translate("Use Proxy"), translate("Use proxy to connect to upstream DNS server."))
+o.rmempty     = true
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+function o.validate(self, value, section)
+    if value == "1" then
+        local proxy = m.uci:get_first("smartdns", "smartdns", "proxy_server")
+        if proxy == nil or proxy == "" then
+            return nil, translate("Please set proxy server first.")
+        end
+    end
+    return value
+end
+
 ---- other args
 o = s:option(Value, "addition_arg", translate("Additional Server Args"), translate("Additional Args for upstream dns servers"))
 o.default     = ""