TcpConnection.cxx

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#include "TcpConnection.hxx"
#include <vector>
#include "ConnectionManager.hxx"
#include "RequestHandler.hxx"
#include <rutil/Logger.hxx>
#include "ReTurnSubsystem.hxx"
 
#define RESIPROCATE_SUBSYSTEM ReTurnSubsystem::RETURN
 
using namespace std;
using namespace resip;
 
namespace reTurn {
 
TcpConnection::TcpConnection(asio::io_context& ioService,
    ConnectionManager& manager, RequestHandler& handler)
  : AsyncTcpSocketBase(ioService),
    mConnectionManager(manager),
    mRequestHandler(handler)
{
}
 
TcpConnection::~TcpConnection()
{
   DebugLog(<< "TcpConnection destroyed.");
}
 
asio::ip::tcp::socket& 
TcpConnection::socket()
{
  return mSocket;
}
 
void 
TcpConnection::start()
{
   DebugLog(<< "TcpConnection started.");
   setConnectedAddressAndPort();
   asio::error_code ec;
   mLocalAddress = mSocket.local_endpoint(ec).address();
   mLocalPort = mSocket.local_endpoint(ec).port();
   // Closed if it goes TcpConnectionIdleTimeout without receiving anything while it carries no
   // allocation
   startIdleTimer(mRequestHandler.getConfig().mTcpConnectionIdleTimeout, [this]() { return !mTurnAllocationManager.empty(); });
   doFramedReceive();
}
 
void 
TcpConnection::stop()
{
   stopIdleTimer();
   asio::error_code ec;
   mSocket.close(ec);
}
 
void 
TcpConnection::close()
{
   mConnectionManager.stop(shared_from_this());
}
 
void 
TcpConnection::onReceiveSuccess(const asio::ip::address& address, unsigned short port, const std::shared_ptr<DataBuffer>& data)
{
   noteReceived();
   if (data->size() > 4)
   {
      /*
      std::cout << "Read " << bytesTransferred << " bytes from tcp socket (" << address.to_string() << ":" << port << "): " << std::endl;
      cout << std::hex;
      for(int i = 0; i < data->size(); i++)
      {
         std::cout << (char)(*data)[i] << "(" << int((*data)[i]) << ") ";
      }
      std::cout << std::dec << std::endl;
      */
 
      if(((*data)[0] & 0xC0) == 0)  // Stun/Turn Messages always have bits 0 and 1 as 00 - otherwise ChannelData message
      {
         // Try to parse stun message
         StunMessage request(StunTuple(StunTuple::TCP, mLocalAddress, mLocalPort),
                             StunTuple(StunTuple::TCP, address, port),
                             (char*)&(*data)[0], (unsigned int)data->size());
         if(request.isValid())
         {
            StunMessage response;
            RequestHandler::ProcessResult result = mRequestHandler.processStunMessage(this, mTurnAllocationManager, request, response);
 
            switch(result)
            {
            case RequestHandler::NoResponseToSend:
               // No response to send - just receive next message
               doFramedReceive();
               return;
            case RequestHandler::RespondFromAlternatePort:
            case RequestHandler::RespondFromAlternateIp:
            case RequestHandler::RespondFromAlternateIpPort:
               // These only happen for UDP server for RFC3489 backwards compatibility
               resip_assert(false);
               break;
            case RequestHandler::RespondFromReceiving:
            default:
               break;
            }
            constexpr size_t RESPONSE_BUFFER_SIZE = 1024;
            const auto buffer = allocateBuffer(RESPONSE_BUFFER_SIZE);
            unsigned int responseSize;
            responseSize = response.stunEncodeMessage((char*)buffer->data(), RESPONSE_BUFFER_SIZE);
            buffer->truncate(responseSize);  // set size to real size
 
            doSend(response.mRemoteTuple, buffer);
         }
         else
         {
            WarningLog(<< "Received invalid StunMessage.  Dropping.");
         }
      }
      else // ChannelData message
      {
         unsigned short channelNumber;
         memcpy(&channelNumber, &(*data)[0], 2);
         channelNumber = ntohs(channelNumber);
 
         mRequestHandler.processTurnData(mTurnAllocationManager,
                                         channelNumber,
                                         StunTuple(StunTuple::TCP, mLocalAddress, mLocalPort),
                                         StunTuple(StunTuple::TCP, address, port),
                                         data);
      }
   }
   else
   {
      WarningLog(<< "Not enough data for stun message or framed message.  Closing connection.");
      close();
      return;
   }
 
   doFramedReceive();
}
 
void 
TcpConnection::onReceiveFailure(const asio::error_code& e)
{
   if(e != asio::error::operation_aborted)
   {
      InfoLog(<< "TcpConnection::onReceiveFailure: " << e.value() << "-" << e.message());
      close();
   }
}
 
void
TcpConnection::onSendSuccess()
{
}
 
void
TcpConnection::onSendFailure(const asio::error_code& error)
{
   if(error != asio::error::operation_aborted)
   {
      InfoLog(<< "TcpConnection::onSendFailure: " << error.value() << "-" << error.message());
      close();
   }
}
 
} 
 
 
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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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 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. 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. 
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 "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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