conf: support prefix wildcard match.

src/dns_client.c

@@ -3372,6 +3372,8 @@ static int _dns_client_setup_server_packet(struct dns_server_info *server_info,
 	struct dns_packet *packet = (struct dns_packet *)packet_buff;
 	struct dns_head head;
 	int encode_len = 0;
+	int repack = 0;
+	int hitchhiking = 0;
 
 	*packet_data = default_packet;
 	*packet_data_len = default_packet_len;
@@ -3381,12 +3383,20 @@ static int _dns_client_setup_server_packet(struct dns_server_info *server_info,
 		return 0;
 	}
 
-	if (server_info->ecs_ipv4.enable == false && query->qtype == DNS_T_A) {
+	if (server_info->ecs_ipv4.enable == true && query->qtype == DNS_T_A) {
-		/* no need to encode packet */
+		repack = 1;
-		return 0;
 	}
 
-	if (server_info->ecs_ipv6.enable == false && query->qtype == DNS_T_AAAA) {
+	if (server_info->ecs_ipv6.enable == true && query->qtype == DNS_T_AAAA) {
+		repack = 1;
+	}
+
+	if ((server_info->flags.server_flag & SERVER_FLAG_HITCHHIKING) != 0) {
+		hitchhiking = 1;
+		repack = 1;
+	}
+
+	if (repack == 0) {
 		/* no need to encode packet */
 		return 0;
 	}
@@ -3406,6 +3416,11 @@ static int _dns_client_setup_server_packet(struct dns_server_info *server_info,
 		return -1;
 	}
 
+	if (hitchhiking != 0 && dns_add_domain(packet, "-", query->qtype, DNS_C_IN) != 0) {
+		tlog(TLOG_ERROR, "add domain to packet failed.");
+		return -1;
+	}
+
 	/* add question */
 	if (dns_add_domain(packet, query->domain, query->qtype, DNS_C_IN) != 0) {
 		tlog(TLOG_ERROR, "add domain to packet failed.");

src/dns_conf.c

@@ -161,6 +161,8 @@ char dns_conf_user[DNS_CONF_USERNAME_LEN];
 int dns_save_fail_packet;
 char dns_save_fail_packet_dir[DNS_MAX_PATH];
 char dns_resolv_file[DNS_MAX_PATH];
+int dns_no_pidfile;
+int dns_no_daemon;
 
 /* ECS */
 struct dns_edns_client_subnet dns_conf_ipv4_ecs;
@@ -508,6 +510,7 @@ static int _config_server(int argc, char *argv[], dns_server_type_t type, int de
 		{"set-mark", required_argument, NULL, 254}, /* set mark */
 		{"bootstrap-dns", no_argument, NULL, 255}, /* set as bootstrap dns */
 		{"subnet", required_argument, NULL, 256}, /* set subnet */
+		{"hitchhiking", no_argument, NULL, 257}, /* hitchhiking */
 		{NULL, no_argument, NULL, 0}
 	};
 	/* clang-format on */
@@ -647,6 +650,9 @@ static int _config_server(int argc, char *argv[], dns_server_type_t type, int de
 			_conf_client_subnet(optarg, &server->ipv4_ecs, &server->ipv6_ecs);
 			break;
 		}
+		case 257: {
+			server_flag |= SERVER_FLAG_HITCHHIKING;
+		}
 		default:
 			break;
 		}
@@ -841,6 +847,8 @@ static int _config_domain_rule_add(const char *domain, enum domain_rule type, vo
 
 	char domain_key[DNS_MAX_CONF_CNAME_LEN];
 	int len = 0;
+	int sub_rule_only = 0;
+	int root_rule_only = 0;
 
 	/* Reverse string, for suffix match */
 	len = strlen(domain);
@@ -849,6 +857,11 @@ static int _config_domain_rule_add(const char *domain, enum domain_rule type, vo
 		goto errout;
 	}
 
+	if (len <= 0) {
+		tlog(TLOG_ERROR, "domain name %s too short", domain);
+		goto errout;
+	}
+
 	if (strncmp(domain, "domain-set:", sizeof("domain-set:") - 1) == 0) {
 		struct dns_set_rule_add_callback_args args;
 		args.type = type;
@@ -858,8 +871,23 @@ static int _config_domain_rule_add(const char *domain, enum domain_rule type, vo
 	}
 
 	reverse_string(domain_key, domain, len, 1);
-	domain_key[len] = '.';
+	if (domain[0] == '*') {
-	len++;
+		/* prefix wildcard */
+		len--;
+		if (domain[1] == '.') {
+			sub_rule_only = 1;
+		}
+	} else if (domain[0] == '-') {
+		/* root match only */
+		len--;
+		if (domain[1] == '.') {
+			root_rule_only = 1;
+		}
+	} else {
+		/* suffix match */
+		domain_key[len] = '.';
+		len++;
+	}
 	domain_key[len] = 0;
 
 	if (type >= DOMAIN_RULE_MAX) {
@@ -884,6 +912,8 @@ static int _config_domain_rule_add(const char *domain, enum domain_rule type, vo
 	}
 
 	domain_rule->rules[type] = rule;
+	domain_rule->sub_rule_only = sub_rule_only;
+	domain_rule->root_rule_only = root_rule_only;
 	_dns_rule_get(rule);
 
 	/* update domain rule */
@@ -3517,6 +3547,8 @@ static struct config_item _config_item[] = {
 	CONF_STRING("ca-path", (char *)&dns_conf_ca_path, DNS_MAX_PATH),
 	CONF_STRING("user", (char *)&dns_conf_user, sizeof(dns_conf_user)),
 	CONF_YESNO("debug-save-fail-packet", &dns_save_fail_packet),
+	CONF_YESNO("no-pidfile", &dns_no_pidfile),
+	CONF_YESNO("no-daemon", &dns_no_daemon),
 	CONF_STRING("resolv-file", (char *)&dns_resolv_file, sizeof(dns_resolv_file)),
 	CONF_STRING("debug-save-fail-packet-dir", (char *)&dns_save_fail_packet_dir, sizeof(dns_save_fail_packet_dir)),
 	CONF_CUSTOM("conf-file", config_additional_file, NULL),

src/dns_conf.h

@@ -119,6 +119,7 @@ typedef enum {
 #define DOMAIN_FLAG_NO_CACHE (1 << 17)
 
 #define SERVER_FLAG_EXCLUDE_DEFAULT (1 << 0)
+#define SERVER_FLAG_HITCHHIKING (1 << 1)
 
 #define BIND_FLAG_NO_RULE_ADDR (1 << 0)
 #define BIND_FLAG_NO_RULE_NAMESERVER (1 << 1)
@@ -217,8 +218,9 @@ extern struct dns_nftset_names dns_conf_nftset_no_speed;
 
 struct dns_domain_rule {
 	struct dns_rule head;
+	unsigned char sub_rule_only : 1;
+	unsigned char root_rule_only : 1;
 	struct dns_rule *rules[DOMAIN_RULE_MAX];
-	int is_sub_rule[DOMAIN_RULE_MAX];
 };
 
 struct dns_nameserver_rule {
@@ -517,6 +519,9 @@ extern int dns_save_fail_packet;
 extern char dns_save_fail_packet_dir[DNS_MAX_PATH];
 extern char dns_resolv_file[DNS_MAX_PATH];
 
+extern int dns_no_pidfile;
+extern int dns_no_daemon;
+
 void dns_server_load_exit(void);
 
 int dns_server_load_conf(const char *file);

src/dns_server.c

@@ -216,6 +216,11 @@ struct dns_request_pending_list {
 	struct hlist_node node;
 };
 
+struct dns_request_domain_rule {
+	struct dns_rule *rules[DOMAIN_RULE_MAX];
+	int is_sub_rule[DOMAIN_RULE_MAX];
+};
+
 typedef DNS_CHILD_POST_RESULT (*child_request_callback)(struct dns_request *request, struct dns_request *child_request,
 														int is_first_resp);
 
@@ -303,7 +308,7 @@ struct dns_request {
 	atomic_t ip_map_num;
 	DECLARE_HASHTABLE(ip_map, 4);
 
-	struct dns_domain_rule domain_rule;
+	struct dns_request_domain_rule domain_rule;
 	int skip_domain_rule;
 	struct dns_domain_check_orders *check_order_list;
 	int check_order;
@@ -710,7 +715,7 @@ static void _dns_server_audit_log(struct dns_server_post_context *context)
 		return;
 	}
 
-	for (j = 1; j < DNS_RRS_END && context->packet; j++) {
+	for (j = 1; j < DNS_RRS_OPT && context->packet; j++) {
 		rrs = dns_get_rrs_start(context->packet, j, &rr_count);
 		for (i = 0; i < rr_count && rrs && left_len > 0; i++, rrs = dns_get_rrs_next(context->packet, rrs)) {
 			switch (rrs->type) {
@@ -1341,7 +1346,7 @@ static int _dns_cache_cname_packet(struct dns_server_post_context *context)
 		return -1;
 	}
 
-	for (j = 1; j < DNS_RRS_END && context->packet; j++) {
+	for (j = 1; j < DNS_RRS_OPT && context->packet; j++) {
 		rrs = dns_get_rrs_start(context->packet, j, &rr_count);
 		for (i = 0; i < rr_count && rrs; i++, rrs = dns_get_rrs_next(context->packet, rrs)) {
 			switch (rrs->type) {
@@ -1699,7 +1704,7 @@ static int _dns_server_setup_ipset_nftset_packet(struct dns_server_post_context
 		timeout_value = _dns_server_get_conf_ttl(request, 0) * 3;
 	}
 
-	for (j = 1; j < DNS_RRS_END; j++) {
+	for (j = 1; j < DNS_RRS_OPT; j++) {
 		rrs = dns_get_rrs_start(context->packet, j, &rr_count);
 		for (i = 0; i < rr_count && rrs; i++, rrs = dns_get_rrs_next(context->packet, rrs)) {
 			switch (rrs->type) {
@@ -2993,7 +2998,7 @@ static int _dns_server_process_answer(struct dns_request *request, const char *d
 		request->rcode = packet->head.rcode;
 	}
 
-	for (j = 1; j < DNS_RRS_END; j++) {
+	for (j = 1; j < DNS_RRS_OPT; j++) {
 		rrs = dns_get_rrs_start(packet, j, &rr_count);
 		for (i = 0; i < rr_count && rrs; i++, rrs = dns_get_rrs_next(packet, rrs)) {
 			switch (rrs->type) {
@@ -3057,7 +3062,7 @@ static int _dns_server_process_answer(struct dns_request *request, const char *d
 				}
 			} break;
 			default:
-				tlog(TLOG_DEBUG, "%s, qtype: %d", name, rrs->type);
+				tlog(TLOG_DEBUG, "%s, qtype: %d, rrstype = %d", name, rrs->type, j);
 				break;
 			}
 		}
@@ -3093,7 +3098,7 @@ static int _dns_server_passthrough_rule_check(struct dns_request *request, const
 		request->rcode = packet->head.rcode;
 	}
 
-	for (j = 1; j < DNS_RRS_END; j++) {
+	for (j = 1; j < DNS_RRS_OPT; j++) {
 		rrs = dns_get_rrs_start(packet, j, &rr_count);
 		for (i = 0; i < rr_count && rrs; i++, rrs = dns_get_rrs_next(packet, rrs)) {
 			switch (rrs->type) {
@@ -3219,7 +3224,7 @@ static int _dns_server_get_answer(struct dns_server_post_context *context)
 	struct dns_request *request = context->request;
 	struct dns_packet *packet = context->packet;
 
-	for (j = 1; j < DNS_RRS_END; j++) {
+	for (j = 1; j < DNS_RRS_OPT; j++) {
 		rrs = dns_get_rrs_start(packet, j, &rr_count);
 		for (i = 0; i < rr_count && rrs; i++, rrs = dns_get_rrs_next(packet, rrs)) {
 			switch (rrs->type) {
@@ -3925,6 +3930,16 @@ static int _dns_server_get_rules(unsigned char *key, uint32_t key_len, int is_su
 		return 0;
 	}
 
+	/* only subkey rule */
+	if (domain_rule->sub_rule_only == 1 && is_subkey == 0) {
+		return 0;
+	}
+
+	/* only root key rule */
+	if (domain_rule->root_rule_only == 1 && is_subkey == 1) {
+		return 0;
+	}
+
 	for (i = 0; i < DOMAIN_RULE_MAX; i++) {
 		if (domain_rule->rules[i] == NULL) {
 			continue;
@@ -4331,7 +4346,7 @@ static int _dns_server_process_cname_pre(struct dns_request *request)
 {
 	struct dns_cname_rule *cname = NULL;
 	struct dns_rule_flags *rule_flag = NULL;
-	struct dns_domain_rule domain_rule;
+	struct dns_request_domain_rule domain_rule;
 
 	if (_dns_server_has_bind_flag(request, BIND_FLAG_NO_RULE_CNAME) == 0) {
 		return 0;

src/smartdns.c

@@ -810,7 +810,7 @@ int main(int argc, char *argv[])
 		goto errout;
 	}
 
-	if (is_foreground == 0) {
+	if (is_foreground == 0 && dns_no_daemon == 0) {
 		daemon_ret = run_daemon();
 		if (daemon_ret < 0) {
 			char buff[4096];
@@ -831,7 +831,7 @@ int main(int argc, char *argv[])
 		_reg_signal();
 	}
 
-	if (strncmp(pid_file, "-", 2) != 0 && create_pid_file(pid_file) != 0) {
+	if (strncmp(pid_file, "-", 2) != 0 && dns_no_pidfile == 0 && create_pid_file(pid_file) != 0) {
 		ret = -2;
 		goto errout;
 	}

test/cases/test-rule.cc

@@ -0,0 +1,262 @@
+/*************************************************************************
+ *
+ * Copyright (C) 2018-2023 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 "client.h"
+#include "dns.h"
+#include "include/utils.h"
+#include "server.h"
+#include "util.h"
+#include "gtest/gtest.h"
+#include <fstream>
+
+class Rule : public ::testing::Test
+{
+  protected:
+	virtual void SetUp() {}
+	virtual void TearDown() {}
+};
+
+TEST_F(Rule, Match)
+{
+	smartdns::MockServer server_upstream;
+	smartdns::Server server;
+
+	server_upstream.Start("udp://0.0.0.0:61053", [&](struct smartdns::ServerRequestContext *request) {
+		if (request->qtype == DNS_T_A) {
+			smartdns::MockServer::AddIP(request, request->domain.c_str(), "1.2.3.4", 700);
+			return smartdns::SERVER_REQUEST_OK;
+		} else if (request->qtype == DNS_T_AAAA) {
+			smartdns::MockServer::AddIP(request, request->domain.c_str(), "64:ff9b::102:304", 700);
+			return smartdns::SERVER_REQUEST_OK;
+		}
+		return smartdns::SERVER_REQUEST_SOA;
+	});
+
+	server.Start(R"""(bind [::]:60053
+server 127.0.0.1:61053
+log-num 0
+log-console yes
+log-level debug
+speed-check-mode none
+address /a.com/5.6.7.8
+cache-persist no)""");
+	smartdns::Client client;
+	ASSERT_TRUE(client.Query("a.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 600);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "5.6.7.8");
+
+	ASSERT_TRUE(client.Query("a.a.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 600);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "5.6.7.8");
+
+	ASSERT_TRUE(client.Query("aa.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "aa.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 700);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
+}
+
+TEST_F(Rule, PrefixWildcardMatch)
+{
+	smartdns::MockServer server_upstream;
+	smartdns::Server server;
+
+	server_upstream.Start("udp://0.0.0.0:61053", [&](struct smartdns::ServerRequestContext *request) {
+		if (request->qtype == DNS_T_A) {
+			smartdns::MockServer::AddIP(request, request->domain.c_str(), "1.2.3.4", 700);
+			return smartdns::SERVER_REQUEST_OK;
+		} else if (request->qtype == DNS_T_AAAA) {
+			smartdns::MockServer::AddIP(request, request->domain.c_str(), "64:ff9b::102:304", 700);
+			return smartdns::SERVER_REQUEST_OK;
+		}
+		return smartdns::SERVER_REQUEST_SOA;
+	});
+
+	server.Start(R"""(bind [::]:60053
+server 127.0.0.1:61053
+log-num 0
+log-console yes
+log-level debug
+speed-check-mode none
+address /*a.com/5.6.7.8
+cache-persist no)""");
+	smartdns::Client client;
+	ASSERT_TRUE(client.Query("a.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 600);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "5.6.7.8");
+
+	ASSERT_TRUE(client.Query("a.a.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 600);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "5.6.7.8");
+
+	ASSERT_TRUE(client.Query("aa.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "aa.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 600);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "5.6.7.8");
+
+	ASSERT_TRUE(client.Query("ab.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "ab.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 700);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
+}
+
+TEST_F(Rule, SubDomainMatchOnly)
+{
+	smartdns::MockServer server_upstream;
+	smartdns::Server server;
+
+	server_upstream.Start("udp://0.0.0.0:61053", [&](struct smartdns::ServerRequestContext *request) {
+		if (request->qtype == DNS_T_A) {
+			smartdns::MockServer::AddIP(request, request->domain.c_str(), "1.2.3.4", 700);
+			return smartdns::SERVER_REQUEST_OK;
+		} else if (request->qtype == DNS_T_AAAA) {
+			smartdns::MockServer::AddIP(request, request->domain.c_str(), "64:ff9b::102:304", 700);
+			return smartdns::SERVER_REQUEST_OK;
+		}
+		return smartdns::SERVER_REQUEST_SOA;
+	});
+
+	server.Start(R"""(bind [::]:60053
+server 127.0.0.1:61053
+log-num 0
+log-console yes
+log-level debug
+speed-check-mode none
+address /*.a.com/5.6.7.8
+cache-persist no)""");
+	smartdns::Client client;
+	ASSERT_TRUE(client.Query("a.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 700);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
+
+	ASSERT_TRUE(client.Query("a.a.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 600);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "5.6.7.8");
+
+	ASSERT_TRUE(client.Query("aa.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "aa.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 700);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
+}
+
+TEST_F(Rule, RootDomainMatchOnly)
+{
+	smartdns::MockServer server_upstream;
+	smartdns::Server server;
+
+	server_upstream.Start("udp://0.0.0.0:61053", [&](struct smartdns::ServerRequestContext *request) {
+		if (request->qtype == DNS_T_A) {
+			smartdns::MockServer::AddIP(request, request->domain.c_str(), "1.2.3.4", 700);
+			return smartdns::SERVER_REQUEST_OK;
+		} else if (request->qtype == DNS_T_AAAA) {
+			smartdns::MockServer::AddIP(request, request->domain.c_str(), "64:ff9b::102:304", 700);
+			return smartdns::SERVER_REQUEST_OK;
+		}
+		return smartdns::SERVER_REQUEST_SOA;
+	});
+
+	server.Start(R"""(bind [::]:60053
+server 127.0.0.1:61053
+log-num 0
+log-console yes
+log-level debug
+speed-check-mode none
+address /-.a.com/5.6.7.8
+cache-persist no)""");
+	smartdns::Client client;
+	ASSERT_TRUE(client.Query("a.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 600);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "5.6.7.8");
+
+	ASSERT_TRUE(client.Query("a.a.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "a.a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 700);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
+
+	ASSERT_TRUE(client.Query("b.a.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "b.a.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 700);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
+
+	ASSERT_TRUE(client.Query("ba.com A", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "ba.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetTTL(), 700);
+	EXPECT_EQ(client.GetAnswer()[0].GetType(), "A");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
+}