channel.h

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// Copyright (C) 2001-2005 Federico Montesino Pouzols <fedemp@altern.org>
// 
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software 
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however    
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.    
//
// This exception applies only to the code released under the name GNU
// ccRTP.  If you copy code from other releases into a copy of GNU
// ccRTP, as the General Public License permits, the exception does
// not apply to the code that you add in this way.  To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
//
// If you write modifications of your own for GNU ccRTP, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.
//

#ifndef CCRTP_CHANNEL_H_
#define CCRTP_CHANNEL_H_

#include <ccrtp/base.h>

#ifndef WIN32
#include <sys/ioctl.h>
inline size_t ccioctl(SOCKET so, int request, size_t& len) 
{ return ::ioctl(so,request,&len); }
#else
inline size_t ccioctl(SOCKET so, int request, size_t& len )
{ 
        unsigned long l; 
        size_t result = 0;
        ::ioctlsocket(so,request,&l); 
        len = l; 
        return result;
}
#endif

#ifdef  CCXX_NAMESPACES
namespace ost {
#endif

class RTPBaseUDPIPv4Socket : private UDPSocket
{
public:
        RTPBaseUDPIPv4Socket(const InetAddress& ia, tpport_t port) :
                UDPSocket(ia,port)
        { }
        
        inline ~RTPBaseUDPIPv4Socket()
        { endSocket(); }
        
        inline bool
        isPendingRecv(microtimeout_t timeout)
        { return UDPSocket::isPending(UDPSocket::pendingInput, timeout); }

        inline InetHostAddress
        getSender(tpport_t& port) const
        { return UDPSocket::getSender(&port); }

        inline size_t
        recv(unsigned char* buffer, size_t len)
        { return UDPSocket::receive(buffer, len); }

        inline size_t
        getNextPacketSize() const
        { size_t len; ccioctl(UDPSocket::so,FIONREAD,len); return len; }

        Socket::Error
        setMulticast(bool enable)
        { return UDPSocket::setMulticast(enable); }

        inline Socket::Error
        join(const InetMcastAddress& ia, uint32 iface)
        { return UDPSocket::join(ia,iface); }

        inline Socket::Error
        drop(const InetMcastAddress& ia)
        { return UDPSocket::drop(ia); }

        inline Socket::Error 
        setTimeToLive(unsigned char ttl)
        { return UDPSocket::setTimeToLive(ttl); }
 
        RTPBaseUDPIPv4Socket() :
                UDPSocket()
        { }

        inline void 
        setPeer(const InetAddress &ia, tpport_t port)
                {UDPSocket::setPeer((InetHostAddress&)ia, port);}

        inline size_t
        send(const unsigned char* const buffer, size_t len)
        { return UDPSocket::send(buffer, len); }

        inline SOCKET getRecvSocket() const
        { return UDPSocket::so; }

        // common
        inline void
        endSocket()
        { UDPSocket::endSocket(); }
};

template<class BaseSocket>
class DualRTPChannel
{
public:
        DualRTPChannel(const InetAddress& ia, tpport_t port)
        { 
                recvSocket = new BaseSocket(ia,port);
                sendSocket = new BaseSocket;
        }

        inline ~DualRTPChannel()
        { delete sendSocket; delete recvSocket; }
        
        inline bool
        isPendingRecv(microtimeout_t timeout) const
        { return recvSocket->isPendingRecv(timeout); }

        inline InetHostAddress
        getSender(tpport_t& port) const
        { return recvSocket->getSender(port); }

        inline size_t
        recv(unsigned char* buffer, size_t len)
        { return recvSocket->recv(buffer, len); }

        inline size_t
        getNextPacketSize() const
        { return recvSocket->getNextPacketSize(); }

        inline Socket::Error
        setMulticast(bool enable)
        { Socket::Error error = recvSocket->setMulticast(enable); 
          if (error) return error;
          return sendSocket->setMulticast(enable); }

        inline Socket::Error
        join(const InetMcastAddress& ia, uint32 iface)
        { return recvSocket->join(ia,iface); }

        inline Socket::Error
        drop(const InetMcastAddress& ia)
        { return recvSocket->drop(ia); }

        inline Socket::Error 
        setTimeToLive(unsigned char ttl)
        { return sendSocket->setTimeToLive(ttl); }
 
        inline void 
        setPeer(const InetAddress& host, tpport_t port)
        { sendSocket->setPeer(host,port); }

        inline size_t
        send(const unsigned char* const buffer, size_t len)               
        { return sendSocket->send(buffer, len); }

        inline SOCKET getRecvSocket() const
        { return recvSocket->getRecvSocket(); }

        // common.
        inline void
        endSocket()
        { sendSocket->endSocket(); recvSocket->endSocket(); }

private:
        BaseSocket* sendSocket;
        BaseSocket* recvSocket;
};

#ifdef  CCXX_IPV6

class RTPBaseUDPIPv6Socket : private UDPSocket
{
public:
        RTPBaseUDPIPv6Socket(const IPV6Address& ia, tpport_t port) :
                UDPSocket(ia,port)
        { }
        
        inline ~RTPBaseUDPIPv6Socket()
        { endSocket(); }
        
        inline bool
        isPendingRecv(microtimeout_t timeout)
        { return UDPSocket::isPending(UDPSocket::pendingInput, timeout); }

        inline IPV6Host
        getSender(tpport_t& port) const
        { return UDPSocket::getIPV6Sender(&port); }

        inline size_t
        recv(unsigned char* buffer, size_t len)
        { return UDPSocket::receive(buffer, len); }

        inline size_t
        getNextPacketSize() const
        { size_t len; ccioctl(UDPSocket::so,FIONREAD,len); return len; }

        Socket::Error
        setMulticast(bool enable)
        { return UDPSocket::setMulticast(enable); }

        inline Socket::Error
        join(const IPV6Multicast& ia, uint32 iface)
        { return Socket::join(ia); }

        inline Socket::Error
        drop(const IPV6Multicast& ia)
        { return UDPSocket::drop(ia); }

        inline Socket::Error 
        setTimeToLive(unsigned char ttl)
        { return UDPSocket::setTimeToLive(ttl); }
 
        RTPBaseUDPIPv6Socket() :
                UDPSocket()
        { }

        inline void 
        setPeer(const IPV6Host &ia, tpport_t port)
                {UDPSocket::setPeer(ia, port);}

        inline size_t
        send(const unsigned char* const buffer, size_t len)
        { return UDPSocket::send(buffer, len); }

        inline SOCKET getRecvSocket() const
        { return UDPSocket::so; }

        // common
        inline void
        endSocket()
        { UDPSocket::endSocket(); }
};

template<class BaseSocket>
class DualRTPChannelIPV6
{
public:
        DualRTPChannelIPV6(const IPV6Host& ia, tpport_t port)
        { 
                recvSocket = new BaseSocket(ia,port);
                sendSocket = new BaseSocket;
        }

        inline ~DualRTPChannelIPV6()
        { delete sendSocket; delete recvSocket; }
        
        inline bool
        isPendingRecv(microtimeout_t timeout) const
        { return recvSocket->isPendingRecv(timeout); }

        inline IPV6Host
        getSender(tpport_t& port) const
        { return recvSocket->getIPV6Sender(port); }

        inline size_t
        recv(unsigned char* buffer, size_t len)
        { return recvSocket->recv(buffer, len); }

        inline size_t
        getNextPacketSize() const
        { return recvSocket->getNextPacketSize(); }

        inline Socket::Error
        setMulticast(bool enable)
        { Socket::Error error = recvSocket->setMulticast(enable); 
          if (error) return error;
          return sendSocket->setMulticast(enable); }

        inline Socket::Error
        join(const IPV6Multicast& ia, uint32 iface)
        { return recvSocket->join(ia,iface); }

        inline Socket::Error
        drop(const IPV6Multicast& ia)
        { return recvSocket->drop(ia); }

        inline Socket::Error 
        setTimeToLive(unsigned char ttl)
        { return sendSocket->setTimeToLive(ttl); }
 
        inline void 
        setPeer(const IPV6Host& host, tpport_t port)
        { sendSocket->setPeer(host,port); }

        inline size_t
        send(const unsigned char* const buffer, size_t len)               
        { return sendSocket->send(buffer, len); }

        inline SOCKET getRecvSocket() const
        { return recvSocket->getRecvSocket(); }

        // common.
        inline void
        endSocket()
        { sendSocket->endSocket(); recvSocket->endSocket(); }

private:
        BaseSocket* sendSocket;
        BaseSocket* recvSocket;
};


typedef DualRTPChannelIPV6<RTPBaseUDPIPv6Socket> DualRTPUDPIPv6Channel; 
typedef RTPBaseUDPIPv6Socket SingleRTPChannelIPV6;
typedef SingleRTPChannelIPV6 SymmetricRTPChannelIPV6;

#endif

typedef DualRTPChannel<RTPBaseUDPIPv4Socket> DualRTPUDPIPv4Channel;

typedef RTPBaseUDPIPv4Socket SingleRTPChannel;

typedef SingleRTPChannel SymmetricRTPChannel;
 // sockets

#ifdef  CCXX_NAMESPACES
}
#endif

#endif  //CCRTP_CHANNEL_H_