connectiontcpbase.cpp

/*
  Copyright (c) 2004-2008 by Jakob Schroeter <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 "gloox.h"

#include "connectiontcpbase.h"
#include "dns.h"
#include "logsink.h"
#include "prep.h"
#include "mutexguard.h"

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

#if !defined( _WIN32 ) && !defined( _WIN32_WCE )
# include <sys/types.h>
# include <sys/socket.h>
# include <sys/select.h>
# include <unistd.h>
#else
# include <winsock.h>
#endif

#include <time.h>

#include <cstdlib>
#include <string>

#ifndef _WIN32_WCE
# include <sstream>
#endif

namespace gloox
{

  ConnectionTCPBase::ConnectionTCPBase( const LogSink& logInstance,
                                        const std::string& server, int port )
    : ConnectionBase( 0 ),
      m_logInstance( logInstance ), m_buf( 0 ), m_socket( -1 ), m_totalBytesIn( 0 ),
      m_totalBytesOut( 0 ), m_bufsize( 1024 ), m_cancel( true )
  {
    init( server, port );
  }

  ConnectionTCPBase::ConnectionTCPBase( ConnectionDataHandler *cdh, const LogSink& logInstance,
                                        const std::string& server, int port )
    : ConnectionBase( cdh ),
      m_logInstance( logInstance ), m_buf( 0 ), m_socket( -1 ), m_totalBytesIn( 0 ),
      m_totalBytesOut( 0 ), m_bufsize( 1024 ), m_cancel( true )
  {
    init( server, port );
  }

  void ConnectionTCPBase::init( const std::string& server, int port )
  {
    m_server = prep::idna( server );
    m_port = port;
    m_buf = (char*)calloc( m_bufsize + 1, sizeof( char ) );
  }

  ConnectionTCPBase::~ConnectionTCPBase()
  {
    cleanup();
    free( m_buf );
    m_buf = 0;
  }

  void ConnectionTCPBase::disconnect()
  {
    MutexGuard rm( m_recvMutex );
    m_cancel = true;
  }

  bool ConnectionTCPBase::dataAvailable( int timeout )
  {
    if( m_socket < 0 )
      return true; // let recv() catch the closed fd

    fd_set fds;
    struct timeval tv;

    FD_ZERO( &fds );
    FD_SET( m_socket, &fds );

    tv.tv_sec = timeout / 1000000;
    tv.tv_usec = timeout % 1000000;

    return ( ( select( m_socket + 1, &fds, 0, 0, timeout == -1 ? 0 : &tv ) > 0 )
             && FD_ISSET( m_socket, &fds ) != 0 );
  }

  ConnectionError ConnectionTCPBase::receive()
  {
    if( m_socket < 0 )
      return ConnNotConnected;

    ConnectionError err = ConnNoError;
    while( !m_cancel && ( err = recv( 10 ) ) == ConnNoError )
      ;
    return err == ConnNoError ? ConnNotConnected : err;
  }

  bool ConnectionTCPBase::send( const std::string& data )
  {
    m_sendMutex.lock();

    if( data.empty() || ( m_socket < 0 ) )
    {
      m_sendMutex.unlock();
      return false;
    }

    int sent = 0;
    for( size_t num = 0, len = data.length(); sent != -1 && num < len; num += sent )
    {
#ifdef SKYOS
      sent = ::send( m_socket, (unsigned char*)(data.c_str()+num), len - num, 0 );
#else
      sent = ::send( m_socket, (data.c_str()+num), len - num, 0 );
#endif
    }

    m_totalBytesOut += data.length();

    m_sendMutex.unlock();

    if( sent == -1 && m_handler )
      m_handler->handleDisconnect( this, ConnIoError );

    return sent != -1;
  }

  void ConnectionTCPBase::getStatistics( int &totalIn, int &totalOut )
  {
    totalIn = m_totalBytesIn;
    totalOut = m_totalBytesOut;
  }

  void ConnectionTCPBase::cleanup()
  {
    if( m_socket >= 0 )
    {
      DNS::closeSocket( m_socket );
      m_socket = -1;
    }

    MutexGuard sm( m_sendMutex );
    MutexGuard rm( m_recvMutex );
    m_state = StateDisconnected;
    m_cancel = true;
    m_totalBytesIn = 0;
    m_totalBytesOut = 0;
  }

}