datagramsocket.cxx

RTP协议

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
 * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
 * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 *
 */


static const char* const DatagramSocket_cxx_Version = 
    "$Id: DatagramSocket.cxx,v 1.23 2001/10/30 21:48:47 icahoon Exp $";


#include "global.h"
#include "TransportCommon.hxx"
#include "DatagramSocket.hxx"
#include "SystemException.hxx"
#include "SystemStatus.hxx"
#include "VLog.hxx"
#include <cerrno>
#include <sys/types.h>


using Vocal::Transport::DatagramSocket;
using Vocal::Transport::Socket;
using Vocal::Transport::TransportAddress;
using Vocal::Transport::AddressFamily;
using Vocal::Transport::SocketType;
using Vocal::Logging::VLog;


DatagramSocket::DatagramSocket(
    const AddressFamily     	&   addressFamily,
    const char      	    	*   name
)
throw ( Vocal::SystemException )
    : 	Socket( addressFamily, 
    	    	SocketType(SOCK_DGRAM), 
		(name ? name : "Datagram")),
    	remoteAddr_(0),
	localAddrUpdated_(false)
{
}

DatagramSocket::DatagramSocket(
    const TransportAddress  	&   localAddr,
    const char      	    	*   name
)
throw ( Vocal::SystemException )
    : 	Socket(localAddr, 
    	    	SocketType(SOCK_DGRAM), 
		(name ? name : "Datagram")),
    	remoteAddr_(0),
	localAddrUpdated_(false)
{
}


DatagramSocket::DatagramSocket(
    const TransportAddress  	&   localAddr,
    const TransportAddress  	&   remoteAddr,
    const char      	    	*   name
)
    throw ( Vocal::SystemException )
    : 	Socket(localAddr, 
    	    	SocketType(SOCK_DGRAM), 
		(name ? name : "Datagram")),
    	remoteAddr_(0),
	localAddrUpdated_(false)
{
    connect(remoteAddr);
}


DatagramSocket::~DatagramSocket()
{
}


void	
DatagramSocket::connect(
    const TransportAddress  & 	remoteAddr
)
throw ( Vocal::SystemException )
{
    const string    fn("DatagramSocket::connect");
    VLog    	    log(fn);
    
    if ( remoteAddr_ == 0 )
    {
        remoteAddr_ = remoteAddr.clone();
    }
    
    if	(   ::connect(fd_, 
    	    	     remoteAddr_->getAddress(), 
		     remoteAddr_->getAddressLength()) < SUCCESS
	)
    {
    	throw Vocal::SystemException(fn + " on connect(): " + strerror(errno), 
	    	    	    	__FILE__, __LINE__, errno);
    }

    VDEBUG(log) << fn << ": fd = " << fd_ 
    	    	<< " connected to remote address = "
		<< *remoteAddr_ << VDEBUG_END(log);
}    

void	
DatagramSocket::disconnect()
throw ( Vocal::SystemException )
{
    const string    fn("DatagramSocket::disconnect");
    VLog    	    log(fn);

    if ( !remoteAddr_ )
    {
    	return;
    }
    
    sockaddr	sa;
    sa.sa_family = AF_UNSPEC;
    
    if ( ::connect(fd_, &sa, sizeof(sa)) )
    {
    	throw Vocal::SystemException(fn + " on disconnect(): " + strerror(errno), 
	    	    	    	__FILE__, __LINE__, errno);
    }

    VDEBUG(log) << fn << ": fd = " << fd_ 
    	    	<< " disconnected from remote address = "
		<< *remoteAddr_ << VDEBUG_END(log);

    remoteAddr_ = 0;
}
			    	

int 	
DatagramSocket::send(const string & message)
throw ( Vocal::SystemException, Vocal::SystemStatus )
{
    if ( !remoteAddr_ || message.size() == 0 )
    {
    	return ( 0 );
    }

    void * msg = reinterpret_cast<void *>(const_cast<char *>(message.c_str()));
    
    return ( sendMessage(msg, message.size(), 0) );
}


int 	
DatagramSocket::send(const char * message)
throw ( Vocal::SystemException, Vocal::SystemStatus )
{
    size_t  messageLength = ( message ? strlen(message) : 0 );
    
    if ( !remoteAddr_ || messageLength == 0 )
    {
    	return ( 0 );
    }

    void * msg = reinterpret_cast<void *>(const_cast<char *>(message));
    
    return ( sendMessage(msg, messageLength, 0) );
}


int 	
DatagramSocket::send(const vector<u_int8_t> & message)
throw ( Vocal::SystemException, Vocal::SystemStatus )
{
    if ( !remoteAddr_ || message.size() == 0 )
    {
    	return ( 0 );
    }

    void * msg = reinterpret_cast<void *>(const_cast<u_int8_t *>(&message[0]));

    return ( sendMessage(msg, message.size(), 0) );
}


int 	
DatagramSocket::send(const u_int8_t * message, size_t messageLength)
throw ( Vocal::SystemException, Vocal::SystemStatus )
{
    if ( !remoteAddr_ || message == 0 || messageLength == 0 )
    {
    	return ( 0 );
    }

    void * msg = reinterpret_cast<void *>(const_cast<u_int8_t *>(message));

    return ( sendMessage(msg, messageLength, 0) );
}


int 	
DatagramSocket::sendTo(
    const string    	    & 	message, 
    const TransportAddress  &	remoteAddress
)
throw ( Vocal::SystemException, Vocal::SystemStatus )
{
    if ( message.size() == 0 )
    {
    	return ( 0 );
    }

    void * msg = reinterpret_cast<void *>(const_cast<char *>(message.c_str()));

    return ( sendMessage(msg, message.size(), &remoteAddress) );
}


int 	
DatagramSocket::sendTo(
    const char    	    * 	message, 
    const TransportAddress  &	remoteAddress
)
throw ( Vocal::SystemException, Vocal::SystemStatus )
{
    size_t messageLength = ( message ? strlen(message) : 0 );
    
    if ( messageLength == 0 )
    {
    	return ( 0 );
    }

    void * msg = reinterpret_cast<void *>(const_cast<char *>(message));

    return ( sendMessage(msg, messageLength, &remoteAddress) );
}


int 	
DatagramSocket::sendTo( 
    const vector<u_int8_t>  & 	message,
    const TransportAddress  &	remoteAddress
)
throw ( Vocal::SystemException, Vocal::SystemStatus )
{
    if ( message.size() == 0 )
    {
    	return ( 0 );
    }

    void * msg = reinterpret_cast<void *>(const_cast<u_int8_t *>(&message[0]));

    return ( sendMessage(msg, message.size(), &remoteAddress) );
}


int 	
DatagramSocket::sendTo( 
    const u_int8_t  	    * 	message,
    size_t  	    	    	messageLength,
    const TransportAddress  &	remoteAddress
)
throw ( Vocal::SystemException, Vocal::SystemStatus )
{
    if ( message == 0 || messageLength == 0 )
    {
    	return ( 0 );
    }

    void * msg = reinterpret_cast<void *>(const_cast<u_int8_t *>(message));

    return ( sendMessage(msg, messageLength, &remoteAddress) );
}


int 	
DatagramSocket::receive(string & message)
throw ( Vocal::SystemException, Vocal::SystemStatus )