Repo created

TMessagesProj/jni/voip/webrtc/p2p/base/stun_server.h

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+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef P2P_BASE_STUN_SERVER_H_
+#define P2P_BASE_STUN_SERVER_H_
+
+#include <stddef.h>
+
+#include <memory>
+
+#include "absl/strings/string_view.h"
+#include "api/transport/stun.h"
+#include "rtc_base/async_packet_socket.h"
+#include "rtc_base/async_udp_socket.h"
+#include "rtc_base/socket_address.h"
+
+namespace cricket {
+
+const int STUN_SERVER_PORT = 3478;
+
+class StunServer {
+ public:
+  // Creates a STUN server, which will listen on the given socket.
+  explicit StunServer(rtc::AsyncUDPSocket* socket);
+  // Removes the STUN server from the socket and deletes the socket.
+  virtual ~StunServer();
+
+ protected:
+  // Callback for packets from socket.
+  void OnPacket(rtc::AsyncPacketSocket* socket,
+                const rtc::ReceivedPacket& packet);
+
+  // Handlers for the different types of STUN/TURN requests:
+  virtual void OnBindingRequest(StunMessage* msg,
+                                const rtc::SocketAddress& addr);
+  void OnAllocateRequest(StunMessage* msg, const rtc::SocketAddress& addr);
+  void OnSharedSecretRequest(StunMessage* msg, const rtc::SocketAddress& addr);
+  void OnSendRequest(StunMessage* msg, const rtc::SocketAddress& addr);
+
+  // Sends an error response to the given message back to the user.
+  void SendErrorResponse(const StunMessage& msg,
+                         const rtc::SocketAddress& addr,
+                         int error_code,
+                         absl::string_view error_desc);
+
+  // Sends the given message to the appropriate destination.
+  void SendResponse(const StunMessage& msg, const rtc::SocketAddress& addr);
+
+  // A helper method to compose a STUN binding response.
+  void GetStunBindResponse(StunMessage* message,
+                           const rtc::SocketAddress& remote_addr,
+                           StunMessage* response) const;
+
+ private:
+  webrtc::SequenceChecker sequence_checker_;
+  std::unique_ptr<rtc::AsyncUDPSocket> socket_;
+};
+
+}  // namespace cricket
+
+#endif  // P2P_BASE_STUN_SERVER_H_