turntcpsocket.cxx

这是国外的resip协议栈

#include "TurnTcpSocket.hxx"
#include <boost/bind.hpp>
#include <rutil/Logger.hxx>
#include "../ReTurnSubsystem.hxx"

#define RESIPROCATE_SUBSYSTEM ReTurnSubsystem::RETURN

using namespace std;

namespace reTurn {

TurnTcpSocket::TurnTcpSocket(const asio::ip::address& address, unsigned short port) : 
   TurnSocket(address,port),
   mSocket(mIOService)
{
   mLocalBinding.setTransportType(StunTuple::TCP);

   asio::error_code errorCode;
   mSocket.open(address.is_v6() ? asio::ip::tcp::v6() : asio::ip::tcp::v4(), errorCode);
   if(!errorCode)
   {
      mSocket.set_option(asio::ip::tcp::no_delay(true)); // ?slg? do we want this?
      mSocket.set_option(asio::ip::tcp::socket::reuse_address(true));
      mSocket.bind(asio::ip::tcp::endpoint(mLocalBinding.getAddress(), mLocalBinding.getPort()), errorCode);
   }
}

asio::error_code 
TurnTcpSocket::connect(const std::string& address, unsigned short port)
{
   // Get a list of endpoints corresponding to the server name.
   asio::ip::tcp::resolver resolver(mIOService);
   resip::Data service(port);
   asio::ip::tcp::resolver::query query(address, service.c_str());   
   asio::ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
   asio::ip::tcp::resolver::iterator end;

   // Try each endpoint until we successfully establish a connection.
   asio::error_code errorCode = asio::error::host_not_found;
   while (errorCode && endpoint_iterator != end)
   {
      mSocket.close();
      mSocket.connect(*endpoint_iterator, errorCode);

      if(!errorCode)
      {
         mConnected = true;
         mConnectedTuple.setTransportType(StunTuple::TCP);
         mConnectedTuple.setAddress(endpoint_iterator->endpoint().address());
         mConnectedTuple.setPort(endpoint_iterator->endpoint().port());
      }
      endpoint_iterator++;
   }

   return errorCode;
}

asio::error_code 
TurnTcpSocket::rawWrite(const char* buffer, unsigned int size)
{
   asio::error_code errorCode;
   asio::write(mSocket, asio::buffer(buffer, size), asio::transfer_all(), errorCode);
   return errorCode;
}

asio::error_code 
TurnTcpSocket::rawWrite(const std::vector<asio::const_buffer>& buffers)
{
   asio::error_code errorCode;
   asio::write(mSocket, buffers, asio::transfer_all(), errorCode);
   return errorCode;
}

asio::error_code 
TurnTcpSocket::rawRead(unsigned int timeout, unsigned int* bytesRead, asio::ip::address* sourceAddress, unsigned short* sourcePort)
{
   startReadTimer(timeout);   
   readHeader();

   // Wait for timer and read to end
   mIOService.run();
   mIOService.reset();

   *bytesRead = (unsigned int)mBytesRead+4;
   if(!mReadErrorCode)
   {
      if(sourceAddress)
      {
         *sourceAddress = mConnectedTuple.getAddress();
      }
      if(sourcePort)
      {
         *sourcePort = mConnectedTuple.getPort();
      }
   }
   return mReadErrorCode;
}

void 
TurnTcpSocket::readHeader()
{
   asio::async_read(mSocket, asio::buffer(mReadBuffer, 4),
                    boost::bind(&TurnTcpSocket::handleReadHeader, this, asio::placeholders::error));
}

void 
TurnTcpSocket::readBody(unsigned int len)
{
   asio::async_read(mSocket, asio::buffer(&mReadBuffer[4], len),
                    boost::bind(&TurnTcpSocket::handleRawRead, this, asio::placeholders::error, asio::placeholders::bytes_transferred));
}

void
TurnTcpSocket::cancelSocket()
{
   mSocket.cancel();
}

void 
TurnTcpSocket::handleReadHeader(const asio::error_code& e)
{
   if (!e)
   {
      /*
      std::cout << "Read header from turn tcp socket: " << std::endl;
      for(unsigned int i = 0; i < 4; i++)
      {
         std::cout << (char)mReadBuffer[i] << "(" << (int)mReadBuffer[i] << ") ";
      }
      std::cout << std::endl;
      */

      // All Turn messaging will be framed
      UInt16 dataLen;
      memcpy(&dataLen, &mReadBuffer[2], 2);
      dataLen = ntohs(dataLen);

      readBody(dataLen);
   }
   else 
   {
      mBytesRead = 0;
      mReadErrorCode = e;
      if (e != asio::error::operation_aborted)
      {
         WarningLog(<< "Read header error: " << e.value() << "-" << e.message());
         mReadTimer.cancel();
      }
   }
}

} // namespace


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

 Original contribution Copyright (C) 2007 Plantronics, Inc.
 Provided under the terms of the Vovida Software License, Version 2.0.

 The Vovida Software License, Version 2.0 
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
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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. 
 
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 NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
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