/usr/include/ccrtp/channel.h is in libccrtp-dev 2.0.9-2.2+b2.
This file is owned by root:root, with mode 0o644.
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//
// 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>
#include <commoncpp/socket.h>
#ifndef _MSWINDOWS_
#include <sys/ioctl.h>
inline size_t ccioctl(int 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
NAMESPACE_COMMONCPP
/**
* @file channel.h
*
* Definition of socket classes for different underlying transport
* and/or network protocols that can be used to instantiate the
* TRTPSessionBase template.
**/
/**
* @defgroup sockets Underlying transport protocol socket classes.
* @{
**/
/**
* @class RTPBaseUDPIPv4Socket
* @short A UDP/IPv4 socket class targeted at RTP stacks.
*
* This class provides a flat interface that includes all the services
* required by an RTP stack.
*
* It can be used in two ways:
*
* To instantiate the DualSocket template, which will be used to
* instantiate an RTP stack template (such as TRTPSessionBase).
*
* To directly instantiate an RTP stack template (such as
* TRTPSessionBase).
*
* This class offers an example of the interface that other classes
* should provide in order to specialize the ccRTP stack for different
* underlying protocols.
*
* @author Federico Montesino Pouzols <fedemp@altern.org>
**/
class RTPBaseUDPIPv4Socket : private UDPSocket
{
public:
/**
* Constructor for receiver.
**/
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); }
/**
* Get size of next datagram waiting to be read.
**/
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); }
/**
* Constructor for transmitter.
**/
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(); }
};
/**
* @class DualUDPIPv4Socket
* @short A socket class based on two UDP/IPv4 sockets.
*
* Defines a communication channel for RTP data and/or RTCP streams.
* Sockets used to instantiate this template must define a framing
* mechanism (UDP does not need any addition, TCP does).
*
* This class implements a socket as a pair of UDP/IPv4 sockets,
* alllowing both transmission and reception of packets in unicast as
* well as multicast mode. The implementation of this class relies on
* the Common C++ UDPSocket class but provides the interface needed by
* a ccRTP stack.
*
* Normally, RTP stacks will use two objects of this class, one for
* RTP data packets transmission/reception and other for RTCP
* (control) transmission/reception.
*
* @author Federico Montesino Pouzols <fedemp@altern.org>
**/
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 RTPBaseUDPIPv4Socket
* @short A UDP/IPv6 socket class targetted at RTP stacks.
*
* This class provides a flat interface that includes all the services
* required by an RTP stack.
*
* It can be used in two ways:
*
* To instantiate the DualSocket template, which will be used to
* instantiate an RTP stack template (such as TRTPSessionBaseIPV6).
*
* To directly instantiate an RTP stack template (such as
* TRTPSessionBaseIPV6).
*
* This class offers an example of the interface that other classes
* should provide in order to specialize the ccRTP stack for different
* underlying protocols.
*
* @author David Sugar <dyfet@gnutelephony.org>
**/
class RTPBaseUDPIPv6Socket : private UDPSocket
{
public:
/**
* Constructor for receiver.
**/
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); }
/**
* Get size of next datagram waiting to be read.
**/
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); }
/**
* Constructor for transmitter.
**/
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(); }
};
/**
* @class DualUDPIPv6Socket
* @short A socket class based on two UDP/IPv6 sockets.
*
* Defines a communication channel for RTP data and/or RTCP streams.
* Sockets used to instantiate this template must define a framing
* mechanism (UDP does not need any addition, TCP does).
*
* This class implements a socket as a pair of UDP/IPv6 sockets,
* alllowing both transmission and reception of packets in unicast as
* well as multicast mode. The implementation of this class relies on
* the Common C++ UDPSocket class but provides the interface needed by
* a ccRTP stack.
*
* Normally, RTP stacks will use two objects of this class, one for
* RTP data packets transmission/reception and other for RTCP
* (control) transmission/reception.
*
* @author David Sugar <dyfet@gnutelephony.org>
**/
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;
/**
* May be used in applications where using the same socket for both
* sending and receiving is not a limitation.
**/
typedef RTPBaseUDPIPv4Socket SingleRTPChannel;
/**
* Actually, RTP with a single channel can be called 'Symmetric RTP'
**/
typedef SingleRTPChannel SymmetricRTPChannel;
/** @}*/ // sockets
END_NAMESPACE
#endif //CCRTP_CHANNEL_H_
/** EMACS **
* Local variables:
* mode: c++
* c-basic-offset: 8
* End:
*/
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