/*
 *  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 WEBRTC_P2P_BASE_ASYNCSTUNTCPSOCKET_H_
#define WEBRTC_P2P_BASE_ASYNCSTUNTCPSOCKET_H_

#include "webrtc/base/asynctcpsocket.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/base/socketfactory.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);
  virtual ~AsyncStunTCPSocket() {}

  virtual int Send(const void* pv, size_t cb,
                   const rtc::PacketOptions& options);
  virtual void ProcessInput(char* data, size_t* len);
  virtual void HandleIncomingConnection(rtc::AsyncSocket* socket);

 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  // WEBRTC_P2P_BASE_ASYNCSTUNTCPSOCKET_H_
