gsocket.c

Wxpython Implemented on Windows CE, Source code

  GSocket *connection = NULL ;

  assert(socket != NULL);

  /* Reenable CONNECTION events */
  socket->m_detected &= ~GSOCK_CONNECTION_FLAG;

  /* If the socket has already been created, we exit immediately */
  if (socket->m_endpoint == kOTInvalidEndpointRef || !socket->m_server)
  {
    socket->m_error = GSOCK_INVSOCK;
    return NULL;
  }

  /* Create a GSocket object for the new connection */
  connection = GSocket_new();

  if (!connection)
  {
    socket->m_error = GSOCK_MEMERR;
    return NULL;
  }

  /* Wait for a connection (with timeout) */
  if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
  {
    GSocket_destroy(connection);
    /* socket->m_error set by _GSocket_Input_Timeout */
    return NULL;
  }

// TODO
#if 0
  connection->m_endpoint = accept(socket->m_endpoint, &from, (WX_SOCKLEN_T *) &fromlen);
#endif

  if (connection->m_endpoint == kOTInvalidEndpointRef )
  {
    if (errno == EWOULDBLOCK)
      socket->m_error = GSOCK_WOULDBLOCK;
    else
      socket->m_error = GSOCK_IOERR;

    GSocket_destroy(connection);
    return NULL;
  }

  /* Initialize all fields */
  connection->m_server   = FALSE;
  connection->m_stream   = TRUE;
  connection->m_oriented = TRUE;

  /* Setup the peer address field */
  connection->m_peer = GAddress_new();
  if (!connection->m_peer)
  {
    GSocket_destroy(connection);
    socket->m_error = GSOCK_MEMERR;
    return NULL;
  }
 // TODO
 #if 0
  err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
  if (err != GSOCK_NOERROR)
  {
    GAddress_destroy(connection->m_peer);
    GSocket_destroy(connection);
    socket->m_error = err;
    return NULL;
  }

  ioctl(connection->m_endpoint, FIONBIO, &arg);
#endif
  _GSocket_Enable_Events(connection);

  return connection;
}

/* Datagram sockets */

/* GSocket_SetNonOriented:
 *  Sets up this socket as a non-connection oriented (datagram) socket.
 *  Before using this function, the local address must have been set
 *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 *  on success, or one of the following otherwise.
 *
 *  Error codes:
 *    GSOCK_INVSOCK - the socket is in use.
 *    GSOCK_INVADDR - the local address has not been set.
 *    GSOCK_IOERR   - low-level error.
 */
GSocketError GSocket_SetNonOriented(GSocket *sck)
{
  assert(sck != NULL);

  if (sck->m_endpoint != kOTInvalidEndpointRef )
  {
    sck->m_error = GSOCK_INVSOCK;
    return GSOCK_INVSOCK;
  }

  if (!sck->m_local)
  {
    sck->m_error = GSOCK_INVADDR;
    return GSOCK_INVADDR;
  }

  /* Initialize all fields */
  sck->m_stream   = FALSE;
  sck->m_server   = FALSE;
  sck->m_oriented = FALSE;

  /* Create the socket */

// TODO
#if 0
  sck->m_endpoint = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
  socket_set_ref( sck->m_endpoint , (unsigned long) &gMacNetEvents ,  (unsigned long) sck ) ;
#endif
  if (sck->m_endpoint == kOTInvalidEndpointRef )
  {
    sck->m_error = GSOCK_IOERR;
    return GSOCK_IOERR;
  }

// TODO
#if 0
  ioctl(sck->m_endpoint, FIONBIO, &arg);
#endif
  _GSocket_Enable_Events(sck);

  /* Bind to the local address,
   * and retrieve the actual address bound.
   */
// TODO
#if 0
  if ((bind(sck->m_endpoint, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
      (getsockname(sck->m_endpoint,
                   sck->m_local->m_addr,
                   (WX_SOCKLEN_T *) &sck->m_local->m_len) != 0))
  {
    close(sck->m_endpoint);
    sck->m_endpoint    = -1;
    sck->m_error = GSOCK_IOERR;
    return GSOCK_IOERR;
  }
#endif
  return GSOCK_NOERROR;
}

/* Client specific parts */

/* GSocket_Connect:
 *  For stream (connection oriented) sockets, GSocket_Connect() tries
 *  to establish a client connection to a server using the peer address
 *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 *  connection has been successfully established, or one of the error
 *  codes listed below. Note that for nonblocking sockets, a return
 *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 *  request can be completed later; you should use GSocket_Select()
 *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 *  corresponding asynchronous events.
 *
 *  For datagram (non connection oriented) sockets, GSocket_Connect()
 *  just sets the peer address established with GSocket_SetPeer() as
 *  default destination.
 *
 *  Error codes:
 *    GSOCK_INVSOCK    - the socket is in use or not valid.
 *    GSOCK_INVADDR    - the peer address has not been established.
 *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 *    GSOCK_MEMERR     - couldn't allocate memory.
 *    GSOCK_IOERR      - low-level error.
 */
GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
{
  InetAddress addr ;
  TEndpointInfo	info;
   OSStatus		err = kOTNoError;
  TCall peer ;

  assert(sck != NULL);

  /* Enable CONNECTION events (needed for nonblocking connections) */
  sck->m_detected &= ~GSOCK_CONNECTION_FLAG;

  if (sck->m_endpoint != kOTInvalidEndpointRef )
  {
    sck->m_error = GSOCK_INVSOCK;
    return GSOCK_INVSOCK;
  }

  if (!sck->m_peer)
  {
    sck->m_error = GSOCK_INVADDR;
    return GSOCK_INVADDR;
  }

  /* Streamed or dgram socket? */
  sck->m_stream   = (stream == GSOCK_STREAMED);
  sck->m_oriented = TRUE;
  sck->m_server   = FALSE;

  /* Create the socket */
#if TARGET_CARBON
  sck->m_endpoint =
  	OTOpenEndpointInContext( OTCreateConfiguration( kTCPName) , 0 , &info , &err , NULL ) ;
#else
  sck->m_endpoint =
  	OTOpenEndpoint( OTCreateConfiguration( kTCPName) , 0 , &info , &err ) ;
#endif
  if ( sck->m_endpoint == kOTInvalidEndpointRef || err != kOTNoError )
  {
		sck->m_endpoint = kOTInvalidEndpointRef ;
    	sck->m_error = GSOCK_IOERR;
    	return GSOCK_IOERR;
  }
  err = OTBind( sck->m_endpoint , nil , nil ) ;
  if ( err != kOTNoError )
  {
    	return GSOCK_IOERR;
  }
  SetDefaultEndpointModes( sck->m_endpoint , sck ) ;
// TODO
#if 0
  ioctl(sck->m_endpoint, FIONBIO, &arg);
#endif
  _GSocket_Enable_Events(sck);

  _GAddress_translate_to( sck->m_peer , &addr ) ;
  memset( &peer , 0 , sizeof( TCall ) ) ;
  peer.addr.len = sizeof( InetAddress ) ;
  peer.addr.buf = (unsigned char*) &addr ;
  err = OTConnect( sck->m_endpoint , &peer , nil ) ;
  if ( err != noErr )
  {
    /* If connect failed with EINPROGRESS and the GSocket object
     * is in blocking mode, we select() for the specified timeout
     * checking for writability to see if the connection request
     * completes.
     */
	
    if ((err == kOTNoDataErr ) && (!sck->m_non_blocking))
    {
      if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
      {
      	OTSndOrderlyDisconnect( sck->m_endpoint ) ;
        sck->m_endpoint = kOTInvalidEndpointRef ;
        /* sck->m_error is set in _GSocket_Output_Timeout */
        return GSOCK_TIMEDOUT;
      }
      else
      {
/*
        int error;
        WX_SOCKLEN_T len = sizeof(error);

        getsockopt(sck->m_endpoint, SOL_SOCKET, SO_ERROR, (void*) &error, &len);

        if (!error)
*/
          return GSOCK_NOERROR;
      }
    }

    /* If connect failed with EINPROGRESS and the GSocket object
     * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
     * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
     * this way if the connection completes, a GSOCK_CONNECTION
     * event will be generated, if enabled.
     */
    if ((err == kOTNoDataErr) && (sck->m_non_blocking))
    {
      sck->m_error = GSOCK_WOULDBLOCK;
      return GSOCK_WOULDBLOCK;
    }

    /* If connect failed with an error other than EINPROGRESS,
     * then the call to GSocket_Connect has failed.
     */
    OTSndOrderlyDisconnect( sck->m_endpoint ) ;

    sck->m_endpoint = kOTInvalidEndpointRef ;
    sck->m_error = GSOCK_IOERR;
    return GSOCK_IOERR;
  }
//  OTInetEventHandler(sck, T_CONNECT , kOTNoError , NULL ) ;
  return GSOCK_NOERROR;
}

/* Generic IO */

/* Like recv(), send(), ... */
int GSocket_Read(GSocket *socket, char *buffer, int size)
{
  int ret = 0 ;

  assert(socket != NULL);

  /* Reenable INPUT events */
  socket->m_detected &= ~GSOCK_INPUT_FLAG;

  if (socket->m_endpoint == kOTInvalidEndpointRef || socket->m_server)
  {
    socket->m_error = GSOCK_INVSOCK;
    return -1;
  }

  /* If the socket is blocking, wait for data (with a timeout) */
  if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
    return -1;

  /* Read the data */
  if (socket->m_stream)
    ret = _GSocket_Recv_Stream(socket, buffer, size);
  else
    ret = _GSocket_Recv_Dgram(socket, buffer, size);

  if (ret == -1)
  {
    if (errno == EWOULDBLOCK)
      socket->m_error = GSOCK_WOULDBLOCK;
    else
      socket->m_error = GSOCK_IOERR;
  }

  return ret;
}

int GSocket_Write(GSocket *socket, const char *buffer, int size)
{
  int ret;

  assert(socket != NULL);

  if (socket->m_endpoint == kOTInvalidEndpointRef || socket->m_server)
  {
    socket->m_error = GSOCK_INVSOCK;
    return -1;
  }

  /* If the socket is blocking, wait for writability (with a timeout) */
  if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
    return -1;

  /* Write the data */
  if (socket->m_stream)
    ret = _GSocket_Send_Stream(socket, buffer, size);
  else
    ret = _GSocket_Send_Dgram(socket, buffer, size);

  if (ret == -1)
  {
    if (errno == EWOULDBLOCK)
      socket->m_error = GSOCK_WOULDBLOCK;
    else
      socket->m_error = GSOCK_IOERR;

    /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
     * in MSW). Once the first OUTPUT event is received, users can assume
     * that the socket is writable until a read operation fails. Only then
     * will further OUTPUT events be posted.
     */
    socket->m_detected &= ~GSOCK_OUTPUT_FLAG;
    return -1;
  }

  return ret;
}

/* GSocket_Select:
 *  Polls the socket to determine its status. This function will
 *  check for the events specified in the 'flags' parameter, and
 *  it will return a mask indicating which operations can be
 *  performed. This function won't block, regardless of the
 *  mode (blocking | nonblocking) of the socket.
 */
GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
{
  assert(socket != NULL);
  wxMacProcessNotifierEvents() ;
  /*
  state = OTGetEndpointState(socket->m_endpoint);

  if ( ( flags & GSOCK_INPUT_FLAG ) && ! ( socket->m_detected & GSOCK_INPUT_FLAG ) )
  {
  	size_t sz = 0 ;
  	OTCountDataBytes( socket->m_endpoint , &sz ) ;
  	if ( state == T_INCON || sz > 0 )
  	{
        socket->m_detected |= GSOCK_INPUT_FLAG ;
		(socket->m_cbacks[GSOCK_INPUT])(socket, GSOCK_INPUT, socket->m_data[GSOCK_INPUT]);
 	}
  }
  if ( ( flags & GSOCK_INPUT_FLAG ) && ! ( socket->m_detected & GSOCK_OUTPUT_FLAG ) )
  {
  	if ( state == T_DATAXFER || state == T_INREL )
  	{
        socket->m_detected |=GSOCK_OUTPUT_FLAG ;
		(socket->m_cbacks[GSOCK_OUTPUT])(socket, GSOCK_OUTPUT, socket->m_data[GSOCK_OUTPUT]);
  	}
  }
  */
  return ( flags & socket->m_detected ) ;
}

/* Flags */

/* GSocket_SetNonBlocking:
 *  Sets the socket to non-blocking mode. All IO calls will return
 *  immediately.
 */
void GSocket_SetNonBlocking(GSocket *socket, int non_block)
{
  assert(socket != NULL);

  socket->m_non_blocking = non_block;
}

/* GSocket_SetTimeout:
 *  Sets the timeout for blocking calls. Time is expressed in
 *  milliseconds.
 */
void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
{
  assert(socket != NULL);

//  this is usually set too high and we have not yet been able to detect a closed
//  stream, thus we leave the 10 sec timeout
//  socket->m_timeout = millisec;
}

/* GSocket_GetError:
 *  Returns the last error which occurred for this socket. Note that successful
 *  operations do not clear this back to GSOCK_NOERROR, so use it only
 *  after an error.
 */
GSocketError GSocket_GetError(GSocket *socket)
{
  assert(socket != NULL);

  return socket->m_error;
}

/* Callbacks */

/* GSOCK_INPUT:
 *   There is data to be read in the input buffer. If, after a read
 *   operation, there is still data available, the callback function will
 *   be called again.
 * GSOCK_OUTPUT:
 *   The socket is available for writing. That is, the next write call
 *   won't block. This event is generated only once, when the connection is
 *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
 *   when the output buffer empties again. This means that the app should
 *   assume that it can write since the first OUTPUT event, and no more
 *   OUTPUT events will be generated unless an error occurs.
 * GSOCK_CONNECTION:
 *   Connection successfully established, for client sockets, or incoming
 *   client connection, for server sockets. Wait for this event (also watch
 *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
 * GSOCK_LOST:
 *   The connection is lost (or a connection request failed); this could
 *   be due to a failure, or due to the peer closing it gracefully.
 */

/* GSocket_SetCallback:
 *  Enables the callbacks specified by 'flags'. Note that 'flags'
 *  may be a combination of flags OR'ed toghether, so the same
 *  callback function can be made to accept different events.
 *  The callback function must have the following prototype:
 *
 *  void function(GSocket *socket, GSocketEvent event, char *cdata)
 */
void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
                         GSocketCallback callback, char *cdata)
{
  int count;

  assert(socket != NULL);

  for (count = 0; count < GSOCK_MAX_EVENT; count++)
  {
    if ((flags & (1 << count)) != 0)
    {
      socket->m_cbacks[count] = callback;
      socket->m_data[count] = cdata;
    }
  }
}

/* GSocket_UnsetCallback:
 *  Disables all callbacks specified by 'flags', which may be a
 *  combination of flags OR'ed toghether.
 */
void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
{
  int count;

  assert(socket != NULL);

  for (count = 0; count < GSOCK_MAX_EVENT; count++)
  {
    if ((flags & (1 << count)) != 0)
    {
      socket->m_cbacks[count] = NULL;
      socket->m_data[count] = NULL;
    }
  }
}


#define CALL_CALLBACK(socket, event) {                                  \
  _GSocket_Disable(socket, event);                                      \
  if (socket->m_cbacks[event])                                          \
    socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
}

int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
{
	OTFlags flags ;
	OTResult res ;
	OTByteCount sz = 0 ;

  	OTCountDataBytes( socket->m_endpoint , &sz ) ;
  	if ( size > (int)sz )
  	  size = sz ;
	res = OTRcv( socket->m_endpoint , buffer , size , &flags ) ;
	if ( res < 0 )
	{
		return -1 ;
	}
	
	// we simulate another read event if there are still bytes
	if ( socket->m_takesEvents )
	{
  		OTByteCount sz = 0 ;
  		OTCountDataBytes( socket->m_endpoint , &sz ) ;
  		if ( sz > 0 )
  		{
        	socket->m_detected |= GSOCK_INPUT_FLAG ;
			(socket->m_cbacks[GSOCK_INPUT])(socket, GSOCK_INPUT, socket->m_data[GSOCK_INPUT]);
 		}
 	}
 	return res ;
}

int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
{
// TODO