AsyncTcpSocketBase.cxx

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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
#include <functional>
 
#include "AsyncTcpSocketBase.hxx"
#include "AsyncSocketBaseHandler.hxx"
#include <rutil/Logger.hxx>
#include "ReTurnSubsystem.hxx"
 
#define RESIPROCATE_SUBSYSTEM ReTurnSubsystem::RETURN
 
using namespace std;
 
namespace reTurn {
 
AsyncTcpSocketBase::AsyncTcpSocketBase(asio::io_context& ioService) 
 : AsyncSocketBase(ioService),
   mSocket(ioService), 
   mResolver(ioService)
{
}
 
unsigned int 
AsyncTcpSocketBase::getSocketDescriptor() 
{ 
   return (unsigned int)mSocket.native_handle(); 
}
 
asio::error_code 
AsyncTcpSocketBase::bind(const asio::ip::address& address, unsigned short port)
{
   // connect() binds the socket again, for each address it tries
   mLocalTcpEndpoint = asio::ip::tcp::endpoint(address, port);
   return openAndBind(mSocket);
}
 
void
AsyncTcpSocketBase::connect(const std::string& address, unsigned short port)
{
   // Start an asynchronous resolve to translate the address
   // into a list of endpoints.
   resip::Data service(port);
   mResolver.async_resolve(mLocalTcpEndpoint.protocol(), address, service.c_str(),
        std::bind(&AsyncSocketBase::handleTcpResolve, shared_from_this(),
                    std::placeholders::_1,
                    std::placeholders::_2));
}
 
void 
AsyncTcpSocketBase::handleTcpResolve(const asio::error_code& ec,
                                     const asio::ip::tcp::resolver::results_type& endpoints)
{
   if (!ec)
   {
      // Attempt a connection to the first endpoint in the list. Each endpoint
      // will be tried until we successfully establish a connection.
      asyncConnect(mSocket, endpoints);
   }
   else
   {
      onConnectFailure(ec);
   }
}
 
void 
AsyncTcpSocketBase::handleConnect(const asio::error_code& ec,
                                  const asio::ip::tcp::endpoint& endpoint)
{
   if (!ec)
   {
      // The connection was successful.
      mConnected = true;
      mConnectedAddress = endpoint.address();
      mConnectedPort = endpoint.port();
 
      onConnectSuccess();
   }
   else
   {
      onConnectFailure(ec);
   }
}
 
void
AsyncTcpSocketBase::setConnectedAddressAndPort()
{
   asio::error_code ec;
   mConnectedAddress = mSocket.remote_endpoint(ec).address();
   mConnectedPort = mSocket.remote_endpoint(ec).port();
}
 
asio::ip::address 
AsyncTcpSocketBase::getSenderEndpointAddress() 
{ 
   return mConnectedAddress; 
}
 
unsigned short 
AsyncTcpSocketBase::getSenderEndpointPort() 
{ 
   return mConnectedPort; 
}
 
void 
AsyncTcpSocketBase::transportSend(const StunTuple& destination, std::vector<asio::const_buffer>& buffers)
{
   // Note: destination is ignored for TCP
   asio::async_write(mSocket, buffers, 
                     std::bind(&AsyncTcpSocketBase::handleSend, shared_from_this(), std::placeholders::_1));
}
 
void 
AsyncTcpSocketBase::transportReceive()
{
   mSocket.async_read_some(asio::buffer((void*)mReceiveBuffer->data(), RECEIVE_BUFFER_SIZE),
                           std::bind(&AsyncTcpSocketBase::handleReceive, shared_from_this(), std::placeholders::_1, std::placeholders::_2));
}
 
void 
AsyncTcpSocketBase::transportFramedReceive()
{
   asio::async_read(mSocket, asio::buffer((void*)mReceiveBuffer->data(), 4),
                    std::bind(&AsyncSocketBase::handleReadHeader, shared_from_this(), std::placeholders::_1));
}
 
void 
AsyncTcpSocketBase::handleReadHeader(const asio::error_code& e)
{
   if (!e)
   {
      /*      
      std::cout << "Read header from tcp socket: " << std::endl;
      for(unsigned int i = 0; i < 4; i++)
      {
         std::cout << (char)(*mReceiveBuffer)[i] << "(" << (int)(*mReceiveBuffer)[i] << ") ";
      }
      std::cout << std::endl;
      */
 
      // Note:  For both StunMessages and ChannelData messages the length in bytes 3 and 4
      uint16_t dataLen;
      memcpy(&dataLen, &(*mReceiveBuffer)[2], 2);
      dataLen = ntohs(dataLen);
 
      // ChannelData's padding is read with it, but not passed on
      size_t padding = 0;
      if(((*mReceiveBuffer)[0] & 0xC0) == 0)  // If first 2 bits are 00 then this is a stun message
      {
         dataLen += 16;  // There are 20 bytes in total in the header, and we have already read 4 - read the rest of the header + the body
      }
      else
      {
         padding = channelDataPadding(dataLen);
      }
      if (dataLen + padding + 4U < RECEIVE_BUFFER_SIZE)
      {
         asio::async_read(mSocket, asio::buffer(&(*mReceiveBuffer)[4], dataLen + padding),
                          std::bind(&AsyncTcpSocketBase::handleReceive, shared_from_this(), std::placeholders::_1, dataLen+4));
      }
      else
      {
         WarningLog(<< "Receive buffer (" << RECEIVE_BUFFER_SIZE << ") is not large enough to accommodate incoming framed data (" << dataLen+4 << ") closing connection.");
         close();
      }
   }
   else if (e != asio::error::operation_aborted)
   {
      if(e != asio::error::eof && 
#ifdef _WIN32
         e.value() != ERROR_CONNECTION_ABORTED &&  // This happens on Windows 7 when closing the socket
#endif
         e != asio::error::connection_reset)
      {
         WarningLog(<< "Read header error: " << e.value() << "-" << e.message());
      }
      close();
   }
}
 
void 
AsyncTcpSocketBase::transportClose()
{
   if (mOnBeforeSocketCloseFp)
   {
      mOnBeforeSocketCloseFp((unsigned int)mSocket.native_handle());
   }
 
   asio::error_code ec;
   mSocket.close(ec);
}
 
}
 
 
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 Copyright (c) 2008-2026 SIP Spectrum, Inc. https://www.sipspectrum.com
 Copyright (c) 2007-2008, Plantronics, Inc.
 All rights reserved.
 
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    notice, this list of conditions and the following disclaimer. 
 
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    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution. 
 
 3. Neither the name of Plantronics nor the names of its contributors 
    may be used to endorse or promote products derived from this 
    software without specific prior written permission. 
 
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 "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 COPYRIGHT 
 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
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 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
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