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/* $Id$ */
/*
* Copyright (C) 2003-2007 Benny Prijono <benny@prijono.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
*/
#ifndef __PJMEDIA_TRANSPORT_UDP_H__
#define __PJMEDIA_TRANSPORT_UDP_H__
/**
* @file transport_udp.h
* @brief Stream transport with UDP.
*/
#include <pjmedia/stream.h>
/**
* @defgroup PJMEDIA_TRANSPORT_UDP UDP Socket Transport
* @ingroup PJMEDIA_TRANSPORT_H
* @brief Implementation of media transport with UDP sockets.
* @{
*/
PJ_BEGIN_DECL
/**
* Options that can be specified when creating UDP transport.
*/
enum pjmedia_transport_udp_options
{
/**
* Normally the UDP transport will continuously check the source address
* of incoming packets to see if it is different than the configured
* remote address, and switch the remote address to the source address
* of the packet if they are different after several packets are
* received.
* Specifying this option will disable this feature.
*/
PJMEDIA_UDP_NO_SRC_ADDR_CHECKING = 1
};
/**
* UDP transport info.
*/
typedef struct pjmedia_transport_udp_info
{
/**
* Media socket info.
*/
pjmedia_sock_info skinfo;
} pjmedia_transport_udp_info;
/**
* Create an RTP and RTCP sockets and bind the sockets to the specified
* port to create media transport.
*
* @param endpt The media endpoint instance.
* @param name Optional name to be assigned to the transport.
* @param port UDP port number for the RTP socket. The RTCP port number
* will be set to one above RTP port.
* @param options Options, bitmask of #pjmedia_transport_udp_options.
* @param p_tp Pointer to receive the transport instance.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t) pjmedia_transport_udp_create(pjmedia_endpt *endpt,
const char *name,
int port,
unsigned options,
pjmedia_transport **p_tp);
/**
* Create an RTP and RTCP sockets and bind the sockets to the specified
* address and port to create media transport.
*
* @param endpt The media endpoint instance.
* @param name Optional name to be assigned to the transport.
* @param addr Optional local address to bind the sockets to. If this
* argument is NULL or empty, the sockets will be bound
* to all interface.
* @param port UDP port number for the RTP socket. The RTCP port number
* will be set to one above RTP port.
* @param options Options, bitmask of #pjmedia_transport_udp_options.
* @param p_tp Pointer to receive the transport instance.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t) pjmedia_transport_udp_create2(pjmedia_endpt *endpt,
const char *name,
const pj_str_t *addr,
int port,
unsigned options,
pjmedia_transport **p_tp);
/**
* Get media socket info from the specified UDP transport.
*
* @param tp The UDP transport interface.
* @param info Media socket info to be initialized.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t)
pjmedia_transport_udp_get_info( pjmedia_transport *tp,
pjmedia_transport_udp_info *info);
/**
* Create UDP stream transport from existing sockets. Use this function when
* the sockets have previously been created.
*
* @param endpt The media endpoint instance.
* @param name Optional name to be assigned to the transport.
* @param si Media socket info containing the RTP and RTCP sockets.
* @param options Options, bitmask of #pjmedia_transport_udp_options.
* @param p_tp Pointer to receive the transport instance.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t) pjmedia_transport_udp_attach(pjmedia_endpt *endpt,
const char *name,
const pjmedia_sock_info *si,
unsigned options,
pjmedia_transport **p_tp);
/**
* Simulate packet lost in the specified direction (for testing purposes).
* When enabled, the transport will randomly drop packets to the specified
* direction.
*
* @param tp The UDP media transport.
* @param dir Media direction to which packets will be randomly dropped.
* @param pct_lost Percent lost (0-100). Set to zero to disable packet
* lost simulation.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t) pjmedia_transport_udp_simulate_lost(pjmedia_transport *tp,
pjmedia_dir dir,
unsigned pct_lost);
/**
* Close UDP transport. Application can also use the "destroy" member of
* media transport interface to close the UDP transport.
*
* @param tp The UDP media transport.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t) pjmedia_transport_udp_close(pjmedia_transport *tp);
PJ_END_DECL
/**
* @}
*/
#endif /* __PJMEDIA_TRANSPORT_UDP_H__ */
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