dns_server: fix nameserver not working in config group

src/dns_server.c

@@ -6871,7 +6871,7 @@ static void _dns_server_setup_dns_group_name(struct dns_request *request, const
 		group_name = temp_group_name;
 	}
 
-	if (request->dns_group_name[0] != '\0') {
+	if (request->dns_group_name[0] != '\0' && group_name == NULL) {
 		group_name = request->dns_group_name;
 	} else {
 		safe_strncpy(request->dns_group_name, group_name, sizeof(request->dns_group_name));

test/cases/test-client-rule.cc

@@ -144,3 +144,71 @@ acl-enable yes
 	EXPECT_EQ(client.GetAnswer()[0].GetName(), "b.com");
 	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
 }
+
+
+TEST_F(ClientRule, in_group_nameserver) 
+{
+	smartdns::MockServer server_upstream;
+	smartdns::MockServer server_upstream2;
+	smartdns::MockServer server_upstream3;
+	smartdns::Server server;
+
+	server_upstream.Start("udp://0.0.0.0:61053", [](struct smartdns::ServerRequestContext *request) {
+		if (request->qtype != DNS_T_A) {
+			return smartdns::SERVER_REQUEST_SOA;
+		}
+
+		smartdns::MockServer::AddIP(request, request->domain.c_str(), "1.2.3.4", 611);
+		return smartdns::SERVER_REQUEST_OK;
+	});
+
+	server_upstream2.Start("udp://0.0.0.0:62053",
+						   [](struct smartdns::ServerRequestContext *request) {
+		if (request->qtype != DNS_T_A) {
+			return smartdns::SERVER_REQUEST_SOA;
+		}
+
+		smartdns::MockServer::AddIP(request, request->domain.c_str(), "4.5.6.7", 611);
+		return smartdns::SERVER_REQUEST_OK;
+	});
+
+	server_upstream3.Start("udp://0.0.0.0:63053",
+						   [](struct smartdns::ServerRequestContext *request) {
+		if (request->qtype != DNS_T_A) {
+			return smartdns::SERVER_REQUEST_SOA;
+		}
+
+		usleep(10000);
+		smartdns::MockServer::AddIP(request, request->domain.c_str(), "7.8.9.10", 611);
+		return smartdns::SERVER_REQUEST_OK;
+	});
+
+	/* this ip will be discard, but is reachable */
+	server.MockPing(PING_TYPE_ICMP, "1.2.3.4", 60, 10);
+	server.MockPing(PING_TYPE_ICMP, "4.5.6.7", 60, 10);
+	server.MockPing(PING_TYPE_ICMP, "7.8.9.10", 60, 10);
+
+	server.Start(R"""(bind [::]:60053
+server udp://127.0.0.1:62053
+server udp://127.0.0.1:63053 -g in_group
+group-begin client
+server udp://127.0.0.1:61053 -e 
+client-rules 127.0.0.1 
+nameserver /cn/in_group
+group-end
+)""");
+	smartdns::Client client;
+	ASSERT_TRUE(client.Query("b.com", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "b.com");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "1.2.3.4");
+
+	ASSERT_TRUE(client.Query("b.cn", 60053));
+	std::cout << client.GetResult() << std::endl;
+	ASSERT_EQ(client.GetAnswerNum(), 1);
+	EXPECT_EQ(client.GetStatus(), "NOERROR");
+	EXPECT_EQ(client.GetAnswer()[0].GetName(), "b.cn");
+	EXPECT_EQ(client.GetAnswer()[0].GetData(), "7.8.9.10");
+}

test/cases/test-mock-server.cc

@@ -25,12 +25,12 @@ TEST(MockServer, query_fail)
 {
 	smartdns::MockServer server;
 	smartdns::Client client;
-	server.Start("udp://0.0.0.0:7053", [](struct smartdns::ServerRequestContext *request) {
+	server.Start("udp://0.0.0.0:61053", [](struct smartdns::ServerRequestContext *request) {
 		request->response_data_len = 0;
 		return smartdns::SERVER_REQUEST_ERROR;
 	});
 
-	ASSERT_TRUE(client.Query("example.com", 7053));
+	ASSERT_TRUE(client.Query("example.com", 61053));
 	std::cout << client.GetResult() << std::endl;
 	EXPECT_EQ(client.GetStatus(), "SERVFAIL");
 }
@@ -39,10 +39,10 @@ TEST(MockServer, soa)
 {
 	smartdns::MockServer server;
 	smartdns::Client client;
-	server.Start("udp://0.0.0.0:7053",
+	server.Start("udp://0.0.0.0:61053",
 				 [](struct smartdns::ServerRequestContext *request) { return smartdns::SERVER_REQUEST_SOA; });
 
-	ASSERT_TRUE(client.Query("example.com", 7053));
+	ASSERT_TRUE(client.Query("example.com", 61053));
 	std::cout << client.GetResult() << std::endl;
 	EXPECT_EQ(client.GetStatus(), "NXDOMAIN");
 }
@@ -51,10 +51,10 @@ TEST(MockServer, noerror)
 {
 	smartdns::MockServer server;
 	smartdns::Client client;
-	server.Start("udp://0.0.0.0:7053",
+	server.Start("udp://0.0.0.0:61053",
 				 [](struct smartdns::ServerRequestContext *request) { return smartdns::SERVER_REQUEST_OK; });
 
-	ASSERT_TRUE(client.Query("example.com", 7053));
+	ASSERT_TRUE(client.Query("example.com", 61053));
 	std::cout << client.GetResult() << std::endl;
 	EXPECT_EQ(client.GetStatus(), "NOERROR");
 }