text: /*
   * libjingle
   * Copyright 2004--2005, Google Inc.
   *
   * Redistribution and use in source and binary forms, with or without 
   * modification, are permitted provided that the following conditions are met:
   *
   *  1. Redistributions of source code must retain the above copyright notice, 
   *     this list of conditions and the following disclaimer.
   *  2. Redistributions in binary form must reproduce the above copyright notice,
   *     this list of conditions and the following disclaimer in the documentation
   *     and/or other materials provided with the distribution.
   *  3. The name of the author may not be used to endorse or promote products 
   *     derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
   * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
   * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #if defined(_MSC_VER) && _MSC_VER < 1300
  #pragma warning(disable:4786)
  #endif
  
  #include "talk/base/asyncudpsocket.h"
  #include "talk/base/logging.h"
  
  namespace talk_base {
  
  const int BUF_SIZE = 64 * 1024;
  
  AsyncUDPSocket::AsyncUDPSocket(AsyncSocket* socket)
      : AsyncPacketSocket(socket) {
    ASSERT(socket_ != NULL);
    size_ = BUF_SIZE;
    buf_ = new char[size_];
  
    // The socket should start out readable but not writable.
    socket_->SignalReadEvent.connect(this, &AsyncUDPSocket::OnReadEvent);
  }
  
  AsyncUDPSocket::~AsyncUDPSocket() {
    delete [] buf_;
  }
  
  void AsyncUDPSocket::OnReadEvent(AsyncSocket* socket) {
    ASSERT(socket == socket_);
  
    SocketAddress remote_addr;
  
  //  LOG(LS_VERBOSE) << "AsyncUDPSocket::OnReadEvent";
  
    int len = socket_->RecvFrom(buf_, size_, &remote_addr);
    if (len < 0) {
      // An error here typically means we got an ICMP error in response to our
      // send datagram, indicating the remote address was unreachable.
      // When doing ICE, this kind of thing will often happen.
      // TODO: Do something better like forwarding the error to the user.
      SocketAddress local_addr = socket_->GetLocalAddress();
      LOG(LS_INFO) << "AsyncUDPSocket[" << local_addr.ToString() << "] "
                   << "receive failed with error " << socket_->GetError();
      return;
    }
  
    // TODO: Make sure that we got all of the packet.
    // If we did not, then we should resize our buffer to be large enough.
    SignalReadPacket(buf_, (size_t)len, remote_addr, this);
  }
  
  }  // namespace talk_base
  