resiprocate/reTurn/UdpRelayServer.cxx

#include <functional>

#include "UdpRelayServer.hxx"
#include "StunMessage.hxx"
#include "TurnAllocation.hxx"
#include "StunTuple.hxx"
#include <rutil/Logger.hxx>
#include "ReTurnSubsystem.hxx"

#define RESIPROCATE_SUBSYSTEM ReTurnSubsystem::RETURN

using namespace std;

namespace reTurn {

UdpRelayServer::UdpRelayServer(asio::io_context& ioService, TurnAllocation& turnAllocation)
: AsyncUdpSocketBase(ioService),
  mTurnAllocation(turnAllocation),
  mStopping(false),
  mBindSuccess(false)
{
   asio::error_code ec = bind(turnAllocation.getRequestedTuple().getAddress(), turnAllocation.getRequestedTuple().getPort());
   if(ec)
   {
      ErrLog(<< "UdpRelayServer failed to start properly.  [" << mTurnAllocation.getRequestedTuple().getAddress().to_string() << ":" << mTurnAllocation.getRequestedTuple().getPort() << "], error=" << ec.value() << "-" << ec.message());
   }
   else
   {
      mBindSuccess = true;
      InfoLog(<< "UdpRelayServer started.  [" << mTurnAllocation.getRequestedTuple().getAddress().to_string() << ":" << mTurnAllocation.getRequestedTuple().getPort() << "]");
   }
}

UdpRelayServer::~UdpRelayServer()
{
   InfoLog(<< "~UdpRelayServer - destroyed.  [" << mTurnAllocation.getRequestedTuple().getAddress().to_string() << ":" << mTurnAllocation.getRequestedTuple().getPort() << "]");
}

bool
UdpRelayServer::startReceiving()
{
   if(mBindSuccess)
   {
      // Note:  This function is required, since you cannot call shared_from_this in the constructor: shared_from_this requires that at least one shared ptr exists already
      doReceive();
      return true;
   }
   else
   {
      stop();
      return false;
   }
}

void 
UdpRelayServer::stop()
{
   asio::error_code ec;
   mStopping = true;
   mSocket.close(ec);
}

void 
UdpRelayServer::onReceiveSuccess(const asio::ip::address& address, unsigned short port, const std::shared_ptr<DataBuffer>& data)
{
   if(mStopping)
   {
      return;
   }
   if (data->size() > 0)
   {      
      DebugLog(<< "Read " << (int)data->size() << " bytes from udp relay socket (" << address.to_string() << ":" << port << "): ");
      /*
      cout << std::hex;
      for(int i = 0; i < (int)data->size(); i++)
      {
         std::cout << (char)(*data)[i] << "(" << int((*data)[i]) << ") ";
      }
      std::cout << std::dec << std::endl;
      */

      // If active destination is not set, then send to client as a DataInd, otherwise send packet as is
      mTurnAllocation.sendDataToClient(StunTuple(StunTuple::UDP, address, port), data);
   }
   doReceive();
}

void 
UdpRelayServer::onReceiveFailure(const asio::error_code& e)
{
   if(!mStopping && e != asio::error::operation_aborted && e != asio::error::bad_descriptor)
   {
      doReceive();
   }
}

void
UdpRelayServer::onSendSuccess()
{
}

void
UdpRelayServer::onSendFailure(const asio::error_code& error)
{
   if(!mStopping && error != asio::error::operation_aborted)
   {
      if(mLastSendErrorCode == error)
      {
         DebugLog(<< "UdpRelayServer::onSendFailure: [" << mTurnAllocation.getRequestedTuple().getAddress().to_string() << ":" << mTurnAllocation.getRequestedTuple().getPort() << "] " << error.value() << "-" << error.message());
      }
      else
      {
         mLastSendErrorCode = error;
         WarningLog(<< "UdpRelayServer::onSendFailure: [" << mTurnAllocation.getRequestedTuple().getAddress().to_string() << ":" << mTurnAllocation.getRequestedTuple().getPort() << "] " << error.value() << "-" << error.message());
      }
   }
}

}


/* ====================================================================

 Copyright (c) 2007-2008, Plantronics, Inc.
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    may be used to endorse or promote products derived from this 
    software without specific prior written permission. 

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