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vlc/modules/access/udp.c
Marc Ariberti 4b664e9ca0 glibc 2.1 port for linupy (linux on a yopy pda) 
* modules/access/*.c : added include <sys/time.h> for struct timeval
* ipv6.c : ipv6 is not fully supported under glibc2.1 (especially multicast)

VLC rulz on Yopy !
2003-02-07 23:36:55 +00:00

494 lines
15 KiB
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/*****************************************************************************
* udp.c: raw UDP & RTP access plug-in
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: udp.c,v 1.12 2003/02/07 23:36:55 marcari Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Tristan Leteurtre <tooney@via.ecp.fr>
*
* 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, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <vlc/vlc.h>
#include <vlc/input.h>
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#elif defined( _MSC_VER ) && defined( _WIN32 )
# include <io.h>
#endif
#ifdef WIN32
# include <winsock2.h>
# include <ws2tcpip.h>
# ifndef IN_MULTICAST
# define IN_MULTICAST(a) IN_CLASSD(a)
# endif
#else
# include <sys/socket.h>
#endif
#include "network.h"
#define RTP_HEADER_LEN 12
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
static ssize_t Read ( input_thread_t *, byte_t *, size_t );
static ssize_t RTPRead ( input_thread_t *, byte_t *, size_t );
static ssize_t RTPChoose( input_thread_t *, byte_t *, size_t );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define CACHING_TEXT N_("caching value in ms")
#define CACHING_LONGTEXT N_( \
"Allows you to modify the default caching value for udp streams. This " \
"value should be set in miliseconds units." )
vlc_module_begin();
set_description( _("raw UDP access module") );
add_category_hint( N_("udp"), NULL );
add_integer( "udp-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT );
set_capability( "access", 0 );
add_shortcut( "udp" );
add_shortcut( "udpstream" );
add_shortcut( "udp4" );
add_shortcut( "udp6" );
add_shortcut( "rtp" );
add_shortcut( "rtp4" );
add_shortcut( "rtp6" );
set_callbacks( Open, Close );
vlc_module_end();
/*****************************************************************************
* Open: open the socket
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
input_thread_t * p_input = (input_thread_t *)p_this;
input_socket_t * p_access_data;
module_t * p_network;
char * psz_network = "";
char * psz_name = strdup(p_input->psz_name);
char * psz_parser = psz_name;
char * psz_server_addr = "";
char * psz_server_port = "";
char * psz_bind_addr = "";
char * psz_bind_port = "";
int i_bind_port = 0, i_server_port = 0;
network_socket_t socket_desc;
if( config_GetInt( p_input, "ipv4" ) )
{
psz_network = "ipv4";
}
if( config_GetInt( p_input, "ipv6" ) )
{
psz_network = "ipv6";
}
if( *p_input->psz_access )
{
/* Find out which shortcut was used */
if( !strncmp( p_input->psz_access, "udp6", 5 ) )
{
psz_network = "ipv6";
}
else if( !strncmp( p_input->psz_access, "udp4", 5 ) )
{
psz_network = "ipv4";
}
}
/* Parse psz_name syntax :
* [serveraddr[:serverport]][@[bindaddr]:[bindport]] */
if( *psz_parser && *psz_parser != '@' )
{
/* Found server */
psz_server_addr = psz_parser;
while( *psz_parser && *psz_parser != ':' && *psz_parser != '@' )
{
if( *psz_parser == '[' )
{
/* IPv6 address */
while( *psz_parser && *psz_parser != ']' )
{
psz_parser++;
}
}
psz_parser++;
}
if( *psz_parser == ':' )
{
/* Found server port */
*psz_parser = '\0'; /* Terminate server name */
psz_parser++;
psz_server_port = psz_parser;
while( *psz_parser && *psz_parser != '@' )
{
psz_parser++;
}
}
}
if( *psz_parser == '@' )
{
/* Found bind address or bind port */
*psz_parser = '\0'; /* Terminate server port or name if necessary */
psz_parser++;
if( *psz_parser && *psz_parser != ':' )
{
/* Found bind address */
psz_bind_addr = psz_parser;
while( *psz_parser && *psz_parser != ':' )
{
if( *psz_parser == '[' )
{
/* IPv6 address */
while( *psz_parser && *psz_parser != ']' )
{
psz_parser++;
}
}
psz_parser++;
}
}
if( *psz_parser == ':' )
{
/* Found bind port */
*psz_parser = '\0'; /* Terminate bind address if necessary */
psz_parser++;
psz_bind_port = psz_parser;
}
}
/* Convert ports format */
if( *psz_server_port )
{
i_server_port = strtol( psz_server_port, &psz_parser, 10 );
if( *psz_parser )
{
msg_Err( p_input, "cannot parse server port near %s", psz_parser );
free(psz_name);
return( -1 );
}
}
if( *psz_bind_port )
{
i_bind_port = strtol( psz_bind_port, &psz_parser, 10 );
if( *psz_parser )
{
msg_Err( p_input, "cannot parse bind port near %s", psz_parser );
free(psz_name);
return( -1 );
}
}
if( i_bind_port == 0 )
{
i_bind_port = config_GetInt( p_this, "server-port" );
}
p_input->pf_read = RTPChoose;
p_input->pf_set_program = input_SetProgram;
p_input->pf_set_area = NULL;
p_input->pf_seek = NULL;
vlc_mutex_lock( &p_input->stream.stream_lock );
p_input->stream.b_pace_control = 0;
p_input->stream.b_seekable = 0;
p_input->stream.b_connected = 0;
p_input->stream.p_selected_area->i_tell = 0;
p_input->stream.i_method = INPUT_METHOD_NETWORK;
vlc_mutex_unlock( &p_input->stream.stream_lock );
if( *psz_server_addr || i_server_port )
{
msg_Err( p_input, "this UDP syntax is deprecated; the server argument will be");
msg_Err( p_input, "ignored (%s:%d). If you wanted to enter a multicast address",
psz_server_addr, i_server_port);
msg_Err( p_input, "or local port, type : %s:@%s:%d",
*p_input->psz_access ? p_input->psz_access : "udp",
psz_server_addr, i_server_port );
i_server_port = 0;
psz_server_addr = "";
}
msg_Dbg( p_input, "opening server=%s:%d local=%s:%d",
psz_server_addr, i_server_port, psz_bind_addr, i_bind_port );
/* Prepare the network_socket_t structure */
socket_desc.i_type = NETWORK_UDP;
socket_desc.psz_bind_addr = psz_bind_addr;
socket_desc.i_bind_port = i_bind_port;
socket_desc.psz_server_addr = psz_server_addr;
socket_desc.i_server_port = i_server_port;
/* Find an appropriate network module */
p_input->p_private = (void*) &socket_desc;
p_network = module_Need( p_input, "network", psz_network );
free(psz_name);
if( p_network == NULL )
{
return( -1 );
}
module_Unneed( p_input, p_network );
p_access_data = malloc( sizeof(input_socket_t) );
p_input->p_access_data = (access_sys_t *)p_access_data;
if( p_access_data == NULL )
{
msg_Err( p_input, "out of memory" );
return( -1 );
}
p_access_data->i_handle = socket_desc.i_handle;
p_input->i_mtu = socket_desc.i_mtu;
/* Update default_pts to a suitable value for udp access */
p_input->i_pts_delay = config_GetInt( p_input, "udp-caching" ) * 1000;
return( 0 );
}
/*****************************************************************************
* Close: free unused data structures
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
input_thread_t * p_input = (input_thread_t *)p_this;
input_socket_t * p_access_data = (input_socket_t *)p_input->p_access_data;
msg_Info( p_input, "closing UDP target `%s'", p_input->psz_source );
#ifdef UNDER_CE
CloseHandle( (HANDLE)p_access_data->i_handle );
#elif defined( WIN32 )
closesocket( p_access_data->i_handle );
#else
close( p_access_data->i_handle );
#endif
free( p_access_data );
}
/*****************************************************************************
* Read: read on a file descriptor, checking b_die periodically
*****************************************************************************/
static ssize_t Read( input_thread_t * p_input, byte_t * p_buffer, size_t i_len )
{
#ifdef UNDER_CE
return -1;
#else
input_socket_t * p_access_data = (input_socket_t *)p_input->p_access_data;
struct timeval timeout;
fd_set fds;
int i_ret;
/* Initialize file descriptor set */
FD_ZERO( &fds );
FD_SET( p_access_data->i_handle, &fds );
/* We'll wait 0.5 second if nothing happens */
timeout.tv_sec = 0;
timeout.tv_usec = 500000;
/* Find if some data is available */
i_ret = select( p_access_data->i_handle + 1, &fds,
NULL, NULL, &timeout );
if( i_ret == -1 && errno != EINTR )
{
msg_Err( p_input, "network select error (%s)", strerror(errno) );
}
else if( i_ret > 0 )
{
ssize_t i_recv = recv( p_access_data->i_handle, p_buffer, i_len, 0 );
if( i_recv < 0 )
{
msg_Err( p_input, "recv failed (%s)", strerror(errno) );
}
return i_recv;
}
return 0;
#endif
}
/*****************************************************************************
* RTPRead : read from the network, and parse the RTP header
*****************************************************************************/
static ssize_t RTPRead( input_thread_t * p_input, byte_t * p_buffer,
size_t i_len )
{
int i_rtp_version;
int i_CSRC_count;
int i_payload_type;
byte_t * p_tmp_buffer = alloca( p_input->i_mtu );
/* Get the raw data from the socket.
* We first assume that RTP header size is the classic RTP_HEADER_LEN. */
ssize_t i_ret = Read( p_input, p_tmp_buffer, p_input->i_mtu );
if ( !i_ret ) return 0;
/* Parse the header and make some verifications.
* See RFC 1889 & RFC 2250. */
i_rtp_version = ( p_tmp_buffer[0] & 0xC0 ) >> 6;
i_CSRC_count = ( p_tmp_buffer[0] & 0x0F );
i_payload_type = ( p_tmp_buffer[1] & 0x7F );
if ( i_rtp_version != 2 )
msg_Dbg( p_input, "RTP version is %u, should be 2", i_rtp_version );
if ( i_payload_type != 33 && i_payload_type != 14
&& i_payload_type != 32 )
msg_Dbg( p_input, "unsupported RTP payload type (%u)", i_payload_type );
/* Return the packet without the RTP header. */
i_ret -= ( RTP_HEADER_LEN + 4 * i_CSRC_count );
if ( (size_t)i_ret > i_len )
{
/* This should NOT happen. */
msg_Warn( p_input, "RTP input trashing %d bytes", i_ret - i_len );
i_ret = i_len;
}
p_input->p_vlc->pf_memcpy( p_buffer,
p_tmp_buffer + RTP_HEADER_LEN + 4 * i_CSRC_count,
i_ret );
return i_ret;
}
/*****************************************************************************
* RTPChoose : read from the network, and decide whether it's UDP or RTP
*****************************************************************************/
static ssize_t RTPChoose( input_thread_t * p_input, byte_t * p_buffer,
size_t i_len )
{
int i_rtp_version;
int i_CSRC_count;
int i_payload_type;
byte_t * p_tmp_buffer = alloca( p_input->i_mtu );
/* Get the raw data from the socket.
* We first assume that RTP header size is the classic RTP_HEADER_LEN. */
ssize_t i_ret = Read( p_input, p_tmp_buffer, p_input->i_mtu );
if ( !i_ret ) return 0;
/* Check that it's not TS. */
if ( p_tmp_buffer[0] == 0x47 )
{
msg_Dbg( p_input, "detected TS over raw UDP" );
p_input->pf_read = Read;
p_input->p_vlc->pf_memcpy( p_buffer, p_tmp_buffer, i_ret );
return i_ret;
}
/* Parse the header and make some verifications.
* See RFC 1889 & RFC 2250. */
i_rtp_version = ( p_tmp_buffer[0] & 0xC0 ) >> 6;
i_CSRC_count = ( p_tmp_buffer[0] & 0x0F );
i_payload_type = ( p_tmp_buffer[1] & 0x7F );
if ( i_rtp_version != 2 )
{
msg_Dbg( p_input, "no RTP header detected" );
p_input->pf_read = Read;
p_input->p_vlc->pf_memcpy( p_buffer, p_tmp_buffer, i_ret );
return i_ret;
}
switch ( i_payload_type )
{
case 33:
msg_Dbg( p_input, "detected TS over RTP" );
break;
case 14:
msg_Dbg( p_input, "detected MPEG audio over RTP" );
break;
case 32:
msg_Dbg( p_input, "detected MPEG video over RTP" );
break;
default:
msg_Dbg( p_input, "no RTP header detected" );
p_input->pf_read = Read;
p_input->p_vlc->pf_memcpy( p_buffer, p_tmp_buffer, i_ret );
return i_ret;
}
/* Return the packet without the RTP header. */
p_input->pf_read = RTPRead;
i_ret -= ( RTP_HEADER_LEN + 4 * i_CSRC_count );
if ( (size_t)i_ret > i_len )
{
/* This should NOT happen. */
msg_Warn( p_input, "RTP input trashing %d bytes", i_ret - i_len );
i_ret = i_len;
}
p_input->p_vlc->pf_memcpy( p_buffer,
p_tmp_buffer + RTP_HEADER_LEN + 4 * i_CSRC_count,
i_ret );
return i_ret;
}
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