test: add test framework

test/server.h

@@ -0,0 +1,91 @@
+/*************************************************************************
+ *
+ * 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/>.
+ */
+
+#ifndef _SMARTDNS_SERVER_
+#define _SMARTDNS_SERVER_
+
+#include "dns.h"
+#include <functional>
+#include <string>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <thread>
+
+namespace smartdns
+{
+
+class Server
+{
+  public:
+	enum CONF_TYPE {
+		CONF_TYPE_STRING,
+		CONF_TYPE_FILE,
+	};
+	Server();
+	virtual ~Server();
+
+	bool Start(const std::string &conf, enum CONF_TYPE type = CONF_TYPE_STRING);
+	void Stop(bool graceful = true);
+	bool IsRunning();
+
+  private:
+	pid_t pid_;
+	int fd_;
+	std::string conf_file_;
+	bool clean_conf_file_{false};
+};
+
+struct ServerRequestContext {
+	std::string domain;
+	dns_type qtype;
+	int qclass;
+	struct sockaddr_storage *from;
+	socklen_t fromlen;
+	struct dns_packet *packet;
+	uint8_t *request_data;
+	int request_data_len;
+	uint8_t *response_data;
+	int response_data_max_len;
+	int response_data_len;
+};
+
+using ServerRequest = std::function<bool(struct ServerRequestContext *request)>;
+
+class MockServer
+{
+  public:
+	MockServer();
+	virtual ~MockServer();
+
+	bool Start(const std::string &url, ServerRequest callback);
+	void Stop();
+	bool IsRunning();
+
+  private:
+	void Run();
+
+	bool GetAddr(const std::string &host, const std::string port, int type, int protocol, struct sockaddr_storage *addr,
+				 socklen_t *addrlen);
+	int fd_;
+	std::thread thread_;
+	bool run_;
+	ServerRequest callback_;
+};
+
+} // namespace smartdns
+#endif // _SMARTDNS_SERVER_