connectiontcpclient.cpp

/*
  Copyright (c) 2004-2019 by Jakob Schröter <js@camaya.net>
  This file is part of the gloox library. http://camaya.net/gloox

  This software is distributed under a license. The full license
  agreement can be found in the file LICENSE in this distribution.
  This software may not be copied, modified, sold or distributed
  other than expressed in the named license agreement.

  This software is distributed without any warranty.
*/


#include "config.h"

#include "gloox.h"

#include "connectiontcpclient.h"
#include "dns.h"
#include "logsink.h"
#include "mutexguard.h"
#include "util.h"

#ifdef __MINGW32__
# include <winsock.h>
#endif

#if ( !defined( _WIN32 ) && !defined( _WIN32_WCE ) ) || defined( __SYMBIAN32__ )
# include <sys/types.h>
# include <sys/socket.h>
# include <sys/select.h>
# include <unistd.h>
# include <string.h>
# include <errno.h>
#elif ( defined( _WIN32 ) || defined( _WIN32_WCE ) ) && !defined( __SYMBIAN32__ )
# include <winsock.h>
#endif

#include <cstdlib>
#include <string>

namespace gloox
{

  ConnectionTCPClient::ConnectionTCPClient( const LogSink& logInstance,
                                            const std::string& server, int port )
    : ConnectionTCPBase( logInstance, server, port )
  {
  }

  ConnectionTCPClient::ConnectionTCPClient( ConnectionDataHandler* cdh, const LogSink& logInstance,
                                            const std::string& server, int port )
    : ConnectionTCPBase( cdh, logInstance, server, port )
  {
  }


  ConnectionTCPClient::~ConnectionTCPClient()
  {
  }

  ConnectionBase* ConnectionTCPClient::newInstance() const
  {
    return new ConnectionTCPClient( m_handler, m_logInstance, m_server, m_port );
  }

  ConnectionError ConnectionTCPClient::connect()
  {
    m_sendMutex.lock();
// FIXME CHECKME
    if( !m_handler )
    {
      m_sendMutex.unlock();
      return ConnNotConnected;
    }

    if( m_socket >= 0 && m_state > StateDisconnected )
    {
      m_sendMutex.unlock();
      return ConnNoError;
    }

    m_state = StateConnecting;

    if( m_socket < 0 )
    {
      if( m_port == -1 )
        m_socket = DNS::connect( m_server, m_logInstance );
      else
        m_socket = DNS::connect( m_server, m_port, m_logInstance );
    }

    m_sendMutex.unlock();

    if( m_socket < 0 )
    {
      switch( m_socket )
      {
        case -ConnConnectionRefused:
          m_logInstance.err( LogAreaClassConnectionTCPClient,
                             m_server + ": connection refused" );
          break;
        case -ConnDnsError:
          m_logInstance.err( LogAreaClassConnectionTCPClient,
                             m_server + ": host not found" );
          break;
        default:
          m_logInstance.err( LogAreaClassConnectionTCPClient,
                             "Unknown error condition" );
          break;
      }
      m_handler->handleDisconnect( this, static_cast<ConnectionError>( -m_socket ) );
      return static_cast<ConnectionError>( -m_socket );
    }
    else
    {
      m_state = StateConnected;
    }

    m_cancel = false;
    m_handler->handleConnect( this );
    return ConnNoError;
  }

  ConnectionError ConnectionTCPClient::recv( int timeout )
  {
    m_recvMutex.lock();

    if( m_cancel || m_socket < 0 )
    {
      m_recvMutex.unlock();
      return ConnNotConnected;
    }

    if( !dataAvailable( timeout ) )
    {
      m_recvMutex.unlock();
      return ConnNoError;
    }

#if defined( _WIN32 ) && !defined( __SYMBIAN32__ )
    int size = static_cast<int>( ::recv( m_socket, m_buf, m_bufsize, 0 ) );
#else
    int size = static_cast<int>( ::recv( m_socket, m_buf, m_bufsize, MSG_DONTWAIT ) );
#endif
    if( size > 0 )
      m_totalBytesIn += size;

    m_recvMutex.unlock();

    if( size <= 0 )
    {
      if( size == -1 )
      {

#if defined(__unix__)
      if( errno == EAGAIN || errno == EWOULDBLOCK )
        return ConnNoError;
#endif

        // recv() failed for an unexpected reason
        std::string message = "recv() failed. "
#if defined( _WIN32 ) && !defined( __SYMBIAN32__ )
          "WSAGetLastError: " + util::int2string( ::WSAGetLastError() );
#else
          "errno: " + util::int2string( errno ) + ": " + strerror( errno );
#endif
        m_logInstance.err( LogAreaClassConnectionTCPClient, message );
      }

      ConnectionError error = ( size ? ConnIoError : ConnStreamClosed );
      if( m_handler )
        m_handler->handleDisconnect( this, error );
      return error;
    }

    m_buf[size] = '\0';

    if( m_handler )
      m_handler->handleReceivedData( this, std::string( m_buf, size ) );

    return ConnNoError;
  }

}