text: /*
   *  Copyright 2013 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_ASYNC_STUN_TCP_SOCKET_H_
  #define P2P_BASE_ASYNC_STUN_TCP_SOCKET_H_
  
  #include <stddef.h>
  
  #include "rtc_base/async_packet_socket.h"
  #include "rtc_base/async_socket.h"
  #include "rtc_base/async_tcp_socket.h"
  #include "rtc_base/constructor_magic.h"
  #include "rtc_base/socket_address.h"
  
  namespace cricket {
  
  class AsyncStunTCPSocket : public rtc::AsyncTCPSocketBase {
   public:
    // Binds and connects |socket| and creates AsyncTCPSocket for
    // it. Takes ownership of |socket|. Returns NULL if bind() or
    // connect() fail (|socket| is destroyed in that case).
    static AsyncStunTCPSocket* Create(rtc::AsyncSocket* socket,
                                      const rtc::SocketAddress& bind_address,
                                      const rtc::SocketAddress& remote_address);
  
    AsyncStunTCPSocket(rtc::AsyncSocket* socket, bool listen);
  
    int Send(const void* pv,
             size_t cb,
             const rtc::PacketOptions& options) override;
    void ProcessInput(char* data, size_t* len) override;
    void HandleIncomingConnection(rtc::AsyncSocket* socket) override;
  
   private:
    // This method returns the message hdr + length written in the header.
    // This method also returns the number of padding bytes needed/added to the
    // turn message. |pad_bytes| should be used only when |is_turn| is true.
    size_t GetExpectedLength(const void* data, size_t len, int* pad_bytes);
  
    RTC_DISALLOW_COPY_AND_ASSIGN(AsyncStunTCPSocket);
  };
  
  }  // namespace cricket
  
  #endif  // P2P_BASE_ASYNC_STUN_TCP_SOCKET_H_
  