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vlc/modules/access/mms/mmsh.c

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/*****************************************************************************
* mmsh.c:
*****************************************************************************
* Copyright (C) 2001, 2002 VLC authors and VideoLAN
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_access.h>
#include <vlc_strings.h>
#include <vlc_input.h>
#include <vlc_tls.h>
#include <vlc_url.h>
#include <vlc_memstream.h>
#include "asf.h"
#include "buffer.h"
#include "mms.h"
#include "mmsh.h"
#include "assert.h"
/* TODO:
* - authentication
*/
/*****************************************************************************
* Local prototypes
*****************************************************************************/
int MMSHOpen ( stream_t * );
void MMSHClose ( stream_t * );
static block_t *Block( stream_t *p_access, bool * );
static int Seek( stream_t *, uint64_t );
static int Control( stream_t *, int, va_list );
static int Describe( stream_t *, char **ppsz_location );
static int Start( stream_t *, uint64_t );
static void Stop( stream_t * );
static int GetPacket( stream_t *, chunk_t * );
static void GetHeader( stream_t *p_access, int i_content_length );
static int Restart( stream_t * );
static int Reset( stream_t * );
//#define MMSH_USER_AGENT "NSPlayer/4.1.0.3856"
#define MMSH_USER_AGENT "NSPlayer/7.10.0.3059"
/****************************************************************************
* Open: connect to ftp server and ask for file
****************************************************************************/
int MMSHOpen( stream_t *p_access )
{
access_sys_t *p_sys = calloc( 1, sizeof( *p_sys ) );
char *psz_location = NULL;
if( unlikely(p_sys == NULL) )
return VLC_ENOMEM;
p_access->p_sys = p_sys;
p_sys->i_proto= MMS_PROTO_HTTP;
p_sys->stream = NULL;
p_sys->i_position = 0;
/* Handle proxy */
p_sys->b_proxy = false;
/* Check proxy */
char *psz_proxy = vlc_getProxyUrl( p_access->psz_url );
if( psz_proxy != NULL )
{
p_sys->b_proxy = true;
vlc_UrlParse( &p_sys->proxy, psz_proxy );
free( psz_proxy );
if( ( p_sys->proxy.psz_host == NULL ) ||
( *p_sys->proxy.psz_host == '\0' ) )
{
msg_Warn( p_access, "invalid proxy host" );
vlc_UrlClean( &p_sys->proxy );
free( p_sys );
return VLC_EGENERIC;
}
if( p_sys->proxy.i_port <= 0 )
p_sys->proxy.i_port = 80;
msg_Dbg( p_access, "Using http proxy %s:%d",
p_sys->proxy.psz_host, p_sys->proxy.i_port );
}
/* open a tcp connection */
vlc_UrlParse( &p_sys->url, p_access->psz_url );
if( ( p_sys->url.psz_host == NULL ) ||
( *p_sys->url.psz_host == '\0' ) )
{
msg_Err( p_access, "invalid host" );
goto error;
}
if( p_sys->url.i_port <= 0 )
p_sys->url.i_port = 80;
if( Describe( p_access, &psz_location ) )
goto error;
/* Handle redirection */
if( psz_location != NULL )
{
msg_Dbg( p_access, "redirection to %s", psz_location );
p_access->psz_url = psz_location;
vlc_UrlClean( &p_sys->url );
vlc_UrlClean( &p_sys->proxy );
free( p_sys );
return VLC_ACCESS_REDIRECT;
}
/* Start playing */
if( Start( p_access, 0 ) )
{
msg_Err( p_access, "cannot start stream" );
free( p_sys->p_header );
goto error;
}
ACCESS_SET_CALLBACKS( NULL, Block, Control, Seek );
return VLC_SUCCESS;
error:
if( p_sys->b_proxy )
vlc_UrlClean( &p_sys->proxy );
vlc_UrlClean( &p_sys->url );
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
* Close: free unused data structures
*****************************************************************************/
void MMSHClose ( stream_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
Stop( p_access );
free( p_sys->p_header );
if( p_sys->b_proxy )
vlc_UrlClean( &p_sys->proxy );
vlc_UrlClean( &p_sys->url );
free( p_sys );
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( stream_t *p_access, int i_query, va_list args )
{
access_sys_t *p_sys = p_access->p_sys;
bool *pb_bool;
bool b_bool;
int i_int;
switch( i_query )
{
case STREAM_CAN_SEEK:
pb_bool = va_arg( args, bool * );
*pb_bool = !p_sys->b_broadcast;
break;
case STREAM_CAN_FASTSEEK:
pb_bool = va_arg( args, bool * );
*pb_bool = false;
break;
case STREAM_CAN_PAUSE:
case STREAM_CAN_CONTROL_PACE:
pb_bool = va_arg( args, bool * );
*pb_bool = true;
break;
case STREAM_GET_SIZE:
{
uint64_t *s = va_arg( args, uint64_t * );
if (p_sys->b_broadcast)
return VLC_EGENERIC;
*s = p_sys->asfh.i_file_size;
return VLC_SUCCESS;
}
case STREAM_GET_PTS_DELAY:
*va_arg( args, vlc_tick_t * ) =
VLC_TICK_FROM_MS(var_InheritInteger( p_access, "network-caching" ));
break;
case STREAM_GET_PRIVATE_ID_STATE:
i_int = va_arg( args, int );
pb_bool = va_arg( args, bool * );
if( (i_int < 0) || (i_int > 127) )
return VLC_EGENERIC;
*pb_bool = p_sys->asfh.stream[i_int].i_selected ? true : false;
break;
case STREAM_SET_PRIVATE_ID_STATE:
{
i_int = va_arg( args, int );
b_bool = (bool)va_arg( args, int );
int i_cat;
if( i_int > 127 )
return VLC_EGENERIC;
else if ( i_int < 0 )
{
/* Deselecting all ES in this category */
assert( !b_bool );
i_cat = -1 * i_int;
if ( i_cat > ES_CATEGORY_COUNT )
return VLC_EGENERIC;
}
else
{
/* Chose another ES */
assert( b_bool );
i_cat = p_sys->asfh.stream[i_int].i_cat;
}
for ( int i=0; i< 128; i++ )
{
/* First unselect all streams from the same cat */
if ( i_cat == p_sys->asfh.stream[i].i_cat )
p_sys->asfh.stream[i].i_selected = false;
}
if ( i_int > 0 )
p_sys->asfh.stream[i_int].i_selected = true;
Stop( p_access );
Seek( p_access, p_sys->i_position );
return VLC_SUCCESS;
}
case STREAM_SET_PAUSE_STATE:
b_bool = (bool)va_arg( args, int );
if( b_bool )
Stop( p_access );
else
Seek( p_access, p_sys->i_position );
break;
default:
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Seek: try to go at the right place
*****************************************************************************/
static int Seek( stream_t *p_access, uint64_t i_pos )
{
access_sys_t *p_sys = p_access->p_sys;
chunk_t ck;
uint64_t i_offset;
uint64_t i_packet;
msg_Dbg( p_access, "seeking to %"PRId64, i_pos );
i_packet = ( i_pos - p_sys->i_header ) / p_sys->asfh.i_min_data_packet_size;
i_offset = ( i_pos - p_sys->i_header ) % p_sys->asfh.i_min_data_packet_size;
Stop( p_access );
Start( p_access, i_packet * p_sys->asfh.i_min_data_packet_size );
for( ;; )
{
if( GetPacket( p_access, &ck ) )
break;
/* skip headers */
if( ck.i_type != 0x4824 )
break;
msg_Warn( p_access, "skipping header" );
}
p_sys->i_position = i_pos;
p_sys->i_packet_used += i_offset;
return VLC_SUCCESS;
}
/*****************************************************************************
* Block:
*****************************************************************************/
static block_t *Block( stream_t *p_access, bool *restrict eof )
{
access_sys_t *p_sys = p_access->p_sys;
const unsigned i_packet_min = p_sys->asfh.i_min_data_packet_size;
if( p_sys->i_position < p_sys->i_start + p_sys->i_header )
{
const size_t i_offset = p_sys->i_position - p_sys->i_start;
const size_t i_copy = p_sys->i_header - i_offset;
block_t *p_block = block_Alloc( i_copy );
if( !p_block )
return NULL;
memcpy( p_block->p_buffer, &p_sys->p_header[i_offset], i_copy );
p_sys->i_position += i_copy;
return p_block;
}
else if( p_sys->i_packet_length > 0 &&
p_sys->i_packet_used < __MAX( p_sys->i_packet_length, i_packet_min ) )
{
size_t i_copy = 0;
size_t i_padding = 0;
if( p_sys->i_packet_used < p_sys->i_packet_length )
i_copy = p_sys->i_packet_length - p_sys->i_packet_used;
if( __MAX( p_sys->i_packet_used, p_sys->i_packet_length ) < i_packet_min )
i_padding = i_packet_min - __MAX( p_sys->i_packet_used, p_sys->i_packet_length );
block_t *p_block = block_Alloc( i_copy + i_padding );
if( !p_block )
return NULL;
if( i_copy > 0 )
memcpy( &p_block->p_buffer[0], &p_sys->p_packet[p_sys->i_packet_used], i_copy );
if( i_padding > 0 )
memset( &p_block->p_buffer[i_copy], 0, i_padding );
p_sys->i_packet_used += i_copy + i_padding;
p_sys->i_position += i_copy + i_padding;
return p_block;
}
chunk_t ck;
if( GetPacket( p_access, &ck ) )
{
int i_ret = -1;
if( p_sys->b_broadcast )
{
if( (ck.i_type == 0x4524) && (ck.i_sequence != 0) )
i_ret = Restart( p_access );
else if( ck.i_type == 0x4324 )
i_ret = Reset( p_access );
}
if( i_ret )
{
*eof = true;
return 0;
}
}
if( ck.i_type != 0x4424 )
{
p_sys->i_packet_used = 0;
p_sys->i_packet_length = 0;
}
return NULL;
}
/* */
static int Restart( stream_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
char *psz_location = NULL;
msg_Dbg( p_access, "Restart the stream" );
p_sys->i_start = p_sys->i_position;
/* */
msg_Dbg( p_access, "stopping the stream" );
Stop( p_access );
/* */
msg_Dbg( p_access, "describe the stream" );
if( Describe( p_access, &psz_location ) )
{
msg_Err( p_access, "describe failed" );
return VLC_EGENERIC;
}
free( psz_location );
/* */
if( Start( p_access, 0 ) )
{
msg_Err( p_access, "Start failed" );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
static int Reset( stream_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
asf_header_t old_asfh = p_sys->asfh;
int i;
msg_Dbg( p_access, "Reset the stream" );
p_sys->i_start = p_sys->i_position;
/* */
p_sys->i_packet_sequence = 0;
p_sys->i_packet_used = 0;
p_sys->i_packet_length = 0;
p_sys->p_packet = NULL;
/* Get the next header FIXME memory loss ? */
GetHeader( p_access, -1 );
if( p_sys->i_header <= 0 )
return VLC_EGENERIC;
asf_HeaderParse ( &p_sys->asfh,
p_sys->p_header, p_sys->i_header );
msg_Dbg( p_access, "packet count=%"PRId64" packet size=%d",
p_sys->asfh.i_data_packets_count,
p_sys->asfh.i_min_data_packet_size );
asf_StreamSelect( &p_sys->asfh,
var_InheritInteger( p_access, "mms-maxbitrate" ),
var_InheritBool( p_access, "mms-all" ),
var_InheritBool( p_access, "audio" ),
var_InheritBool( p_access, "video" ) );
/* Check we have comptible asfh */
for( i = 1; i < 128; i++ )
{
asf_stream_t *p_old = &old_asfh.stream[i];
asf_stream_t *p_new = &p_sys->asfh.stream[i];
if( p_old->i_cat != p_new->i_cat || p_old->i_selected != p_new->i_selected )
break;
}
if( i < 128 )
{
msg_Warn( p_access, "incompatible asf header, restart" );
return Restart( p_access );
}
/* */
p_sys->i_packet_used = 0;
p_sys->i_packet_length = 0;
return VLC_SUCCESS;
}
static void WriteRequestLine( const access_sys_t *sys,
struct vlc_memstream *restrict stream )
{
vlc_memstream_open( stream );
vlc_memstream_puts( stream, "GET " );
if( sys->b_proxy )
vlc_memstream_printf( stream, "http://%s:%d", sys->url.psz_host,
sys->url.i_port );
if( (sys->url.psz_path == NULL) || (sys->url.psz_path[0] == '\0') )
vlc_memstream_putc( stream, '/' );
else
vlc_memstream_puts( stream, sys->url.psz_path );
if( sys->url.psz_option != NULL )
vlc_memstream_printf( stream, "?%s", sys->url.psz_option );
vlc_memstream_puts( stream, " HTTP/1.0\r\n" );
vlc_memstream_printf( stream, "Host: %s:%d\r\n", sys->url.psz_host,
sys->url.i_port );
/* Proxy Authentication */
const vlc_url_t *proxy = &sys->proxy;
if( sys->b_proxy && proxy->psz_username != NULL )
{
const char *pw = proxy->psz_password ? proxy->psz_password : "";
char *buf;
if( asprintf( &buf, "%s:%s", proxy->psz_username, pw ) != -1 )
{
char *b64 = vlc_b64_encode( buf );
free( buf );
if( b64 != NULL )
{
vlc_memstream_printf( stream, "Proxy-Authorization: "
"Basic %s\r\n", b64 );
free( b64 );
}
}
}
vlc_memstream_puts( stream, "Accept: */*\r\n" );
vlc_memstream_printf( stream, "User-Agent: %s\r\n", MMSH_USER_AGENT );
}
static int OpenConnection( stream_t *p_access,
struct vlc_memstream *restrict stream )
{
access_sys_t *p_sys = p_access->p_sys;
const vlc_url_t *srv = p_sys->b_proxy ? &p_sys->proxy : &p_sys->url;
/* XXX: This is useless: HTTP/1.0 closes connection by default */
vlc_memstream_puts( stream, "Connection: Close\r\n" );
vlc_memstream_puts( stream, "\r\n" ); /* end of HTTP request header */
if( vlc_memstream_close( stream ) )
return VLC_ENOMEM;
vlc_tls_t *sock = vlc_tls_SocketOpenTCP( VLC_OBJECT(p_access),
srv->psz_host, srv->i_port );
if( sock == NULL )
{
free( stream->ptr );
return VLC_EGENERIC;
}
msg_Dbg( p_access, "sending request:\n%s", stream->ptr );
ssize_t val = vlc_tls_Write( sock, stream->ptr, stream->length );
free( stream->ptr );
if( val < (ssize_t)stream->length )
{
msg_Err( p_access, "failed to send request" );
vlc_tls_Close( sock );
stream = NULL;
}
p_sys->stream = sock;
return (sock != NULL) ? VLC_SUCCESS : VLC_EGENERIC;
}
/*****************************************************************************
* Describe:
*****************************************************************************/
static int Describe( stream_t *p_access, char **ppsz_location )
{
access_sys_t *p_sys = p_access->p_sys;
char *psz_location = NULL;
int i_content_length = -1;
bool b_keepalive = false;
int i_code;
struct vlc_memstream stream;
/* Reinit context */
p_sys->b_broadcast = true;
p_sys->i_request_context = 1;
p_sys->i_packet_sequence = 0;
p_sys->i_packet_used = 0;
p_sys->i_packet_length = 0;
p_sys->p_packet = NULL;
GenerateGuid ( &p_sys->guid );
WriteRequestLine( p_sys, &stream );
vlc_memstream_printf( &stream, "Pragma: no-cache,rate=1.000000,"
"stream-time=0,stream-offset=0:0,"
"request-context=%d,max-duration=0\r\n",
p_sys->i_request_context++ );
vlc_memstream_printf( &stream, "Pragma: xClientGUID={"GUID_FMT"}\r\n",
GUID_PRINT(p_sys->guid) );
if( OpenConnection( p_access, &stream ) )
return VLC_EGENERIC;
/* Receive the http header */
char *psz = vlc_tls_GetLine( p_sys->stream );
if( psz == NULL )
{
msg_Err( p_access, "failed to read answer" );
goto error;
}
if( strncmp( psz, "HTTP/1.", 7 ) )
{
msg_Err( p_access, "invalid HTTP reply '%s'", psz );
free( psz );
goto error;
}
i_code = atoi( &psz[9] );
if( i_code >= 400 )
{
msg_Err( p_access, "error: %s", psz );
free( psz );
goto error;
}
msg_Dbg( p_access, "HTTP reply '%s'", psz );
free( psz );
for( ;; )
{
psz = vlc_tls_GetLine( p_sys->stream );
if( psz == NULL )
{
msg_Err( p_access, "failed to read answer" );
free( psz_location );
goto error;
}
if( *psz == '\0' )
{
free( psz );
break;
}
char *p = strchr( psz, ':' );
if( p == NULL )
{
msg_Err( p_access, "malformed header line: %s", psz );
free( psz );
free( psz_location );
goto error;
}
*p++ = '\0';
while( *p == ' ' ) p++;
/* FIXME FIXME test Content-Type to see if it's a plain stream or an
* asx FIXME */
if( !strcasecmp( psz, "Pragma" ) )
{
if( strstr( p, "features" ) )
{
/* FIXME, it is a bit badly done here ..... */
if( strstr( p, "broadcast" ) )
{
msg_Dbg( p_access, "stream type = broadcast" );
p_sys->b_broadcast = true;
}
else if( strstr( p, "seekable" ) )
{
msg_Dbg( p_access, "stream type = seekable" );
p_sys->b_broadcast = false;
}
else
{
msg_Warn( p_access, "unknown stream types (%s)", p );
p_sys->b_broadcast = false;
}
}
}
else if( !strcasecmp( psz, "Location" ) )
{
free( psz_location );
psz_location = vlc_uri_resolve( p_access->psz_url, p );
}
else if( !strcasecmp( psz, "Content-Length" ) )
{
i_content_length = atoi( p );
msg_Dbg( p_access, "content-length = %d", i_content_length );
}
else if( !strcasecmp( psz, "Connection" ) )
{
if( strcasestr( p, "Keep-Alive" ) )
{
msg_Dbg( p_access, "Keep-Alive header found" );
b_keepalive = true;
}
}
free( psz );
}
/* Handle the redirection */
if( ( (i_code == 301) || (i_code == 302) ||
(i_code == 303) || (i_code == 307) ) &&
psz_location )
{
msg_Dbg( p_access, "redirection to %s", psz_location );
vlc_tls_Close( p_sys->stream );
p_sys->stream = NULL;
*ppsz_location = psz_location;
return VLC_SUCCESS;
}
free( psz_location );
/* Read the asf header */
GetHeader( p_access, b_keepalive ? i_content_length : -1);
if( p_sys->i_header <= 0 )
{
msg_Err( p_access, "header size == 0" );
goto error;
}
/* close this connection */
vlc_tls_Close( p_sys->stream );
p_sys->stream = NULL;
/* *** parse header and get stream and their id *** */
/* get all streams properties,
*
* TODO : stream bitrates properties(optional)
* and bitrate mutual exclusion(optional) */
asf_HeaderParse ( &p_sys->asfh,
p_sys->p_header, p_sys->i_header );
msg_Dbg( p_access, "packet count=%"PRId64" packet size=%d",
p_sys->asfh.i_data_packets_count,
p_sys->asfh.i_min_data_packet_size );
if( p_sys->asfh.i_min_data_packet_size <= 0 )
goto error;
asf_StreamSelect( &p_sys->asfh,
var_InheritInteger( p_access, "mms-maxbitrate" ),
var_InheritBool( p_access, "mms-all" ),
var_InheritBool( p_access, "audio" ),
var_InheritBool( p_access, "video" ) );
return VLC_SUCCESS;
error:
if( p_sys->stream != NULL )
{
vlc_tls_Close( p_sys->stream );
p_sys->stream = NULL;
}
return VLC_EGENERIC;
}
static void GetHeader( stream_t *p_access, int i_content_length )
{
access_sys_t *p_sys = p_access->p_sys;
int i_read_content = 0;
/* Read the asf header */
p_sys->i_header = 0;
free( p_sys->p_header );
p_sys->p_header = NULL;
for( ;; )
{
chunk_t ck;
if( (i_content_length >= 0 && i_read_content >= i_content_length) || GetPacket( p_access, &ck ) || ck.i_type != 0x4824 )
break;
i_read_content += (4+ck.i_size);
if( ck.i_data > 0 )
{
p_sys->i_header += ck.i_data;
p_sys->p_header = xrealloc( p_sys->p_header, p_sys->i_header );
memcpy( &p_sys->p_header[p_sys->i_header - ck.i_data],
ck.p_data, ck.i_data );
}
}
msg_Dbg( p_access, "complete header size=%d", p_sys->i_header );
}
/*****************************************************************************
* Start stream
****************************************************************************/
static int Start( stream_t *p_access, uint64_t i_pos )
{
access_sys_t *p_sys = p_access->p_sys;
int i_streams = 0;
int i_streams_selected = 0;
struct vlc_memstream stream;
msg_Dbg( p_access, "starting stream" );
for( unsigned i = 1; i < 128; i++ )
{
if( p_sys->asfh.stream[i].i_cat == ASF_CODEC_TYPE_UNKNOWN )
continue;
i_streams++;
if( p_sys->asfh.stream[i].i_selected )
i_streams_selected++;
}
if( i_streams_selected <= 0 )
{
msg_Err( p_access, "no stream selected" );
return VLC_EGENERIC;
}
WriteRequestLine( p_sys, &stream );
vlc_memstream_puts( &stream, "Pragma: no-cache,rate=1.000000" );
if( !p_sys->b_broadcast )
vlc_memstream_printf( &stream, ",stream-time=0,stream-offset="
"%"PRIu32":%"PRIu32, (uint32_t)(i_pos >> 32),
(uint32_t)i_pos );
vlc_memstream_printf( &stream, ",request-context=%d",
p_sys->i_request_context++ );
if( !p_sys->b_broadcast )
vlc_memstream_puts( &stream, ",max-duration=0" );
vlc_memstream_puts( &stream, "\r\n" );
vlc_memstream_puts( &stream, "Pragma: xPlayStrm=1\r\n" );
vlc_memstream_printf( &stream, "Pragma: xClientGUID={"GUID_FMT"}\r\n",
GUID_PRINT(p_sys->guid) );
vlc_memstream_printf( &stream, "Pragma: stream-switch-count=%d\r\n",
i_streams );
vlc_memstream_puts( &stream, "Pragma: stream-switch-entry=" );
for( unsigned i = 1; i < 128; i++ )
{
if( p_sys->asfh.stream[i].i_cat != ASF_CODEC_TYPE_UNKNOWN )
{
int i_select = p_sys->asfh.stream[i].i_selected ? 0 : 2;
vlc_memstream_printf( &stream, "ffff:%x:%d ", i, i_select );
}
}
vlc_memstream_puts( &stream, "\r\n" );
if( OpenConnection( p_access, &stream ) )
return VLC_EGENERIC;
char *psz = vlc_tls_GetLine( p_sys->stream );
if( psz == NULL )
{
msg_Err( p_access, "cannot read data 0" );
return VLC_EGENERIC;
}
if( atoi( &psz[9] ) >= 400 )
{
msg_Err( p_access, "error: %s", psz );
free( psz );
return VLC_EGENERIC;
}
msg_Dbg( p_access, "HTTP reply '%s'", psz );
free( psz );
/* FIXME check HTTP code */
for( ;; )
{
psz = vlc_tls_GetLine( p_sys->stream );
if( psz == NULL )
{
msg_Err( p_access, "cannot read data 1" );
return VLC_EGENERIC;
}
if( *psz == '\0' )
{
free( psz );
break;
}
msg_Dbg( p_access, "%s", psz );
free( psz );
}
p_sys->i_packet_used = 0;
p_sys->i_packet_length = 0;
return VLC_SUCCESS;
}
/*****************************************************************************
* closing stream
*****************************************************************************/
static void Stop( stream_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
msg_Dbg( p_access, "closing stream" );
if( p_sys->stream != NULL )
{
vlc_tls_Close( p_sys->stream );
p_sys->stream = NULL;
}
}
/*****************************************************************************
* get packet
*****************************************************************************/
static int GetPacket( stream_t * p_access, chunk_t *p_ck )
{
access_sys_t *p_sys = p_access->p_sys;
int restsize;
/* chunk_t */
memset( p_ck, 0, sizeof( chunk_t ) );
/* Read the chunk header */
/* Some headers are short, like 0x4324. Reading 12 bytes will cause us
* to lose synchronization with the stream. Just read to the length
* (4 bytes), decode and then read up to 8 additional bytes to get the
* entire header.
*/
if( vlc_tls_Read( p_sys->stream, p_sys->buffer, 4, true ) < 4 )
{
msg_Err( p_access, "cannot read data 2" );
return VLC_EGENERIC;
}
p_ck->i_type = GetWLE( p_sys->buffer);
p_ck->i_size = GetWLE( p_sys->buffer + 2);
restsize = p_ck->i_size;
if( restsize > 8 )
restsize = 8;
if( vlc_tls_Read( p_sys->stream, p_sys->buffer + 4, restsize, true ) < restsize )
{
msg_Err( p_access, "cannot read data 3" );
return VLC_EGENERIC;
}
p_ck->i_sequence = GetDWLE( p_sys->buffer + 4);
p_ck->i_unknown = GetWLE( p_sys->buffer + 8);
/* Set i_size2 to 8 if this header was short, since a real value won't be
* present in the buffer. Using 8 avoid reading additional data for the
* packet.
*/
if( restsize < 8 )
p_ck->i_size2 = 8;
else
p_ck->i_size2 = GetWLE( p_sys->buffer + 10);
p_ck->p_data = p_sys->buffer + 12;
p_ck->i_data = p_ck->i_size2 - 8;
if( p_ck->i_type == 0x4524 ) // $E (End-of-Stream Notification) Packet
{
if( p_ck->i_sequence == 0 )
{
msg_Warn( p_access, "EOF" );
return VLC_EGENERIC;
}
else
{
msg_Warn( p_access, "next stream following" );
return VLC_EGENERIC;
}
}
else if( p_ck->i_type == 0x4324 ) // $C (Stream Change Notification) Packet
{
/* 0x4324 is CHUNK_TYPE_RESET: a new stream will follow with a sequence of 0 */
msg_Warn( p_access, "next stream following (reset) seq=%d", p_ck->i_sequence );
return VLC_EGENERIC;
}
else if( (p_ck->i_type != 0x4824) && (p_ck->i_type != 0x4424) )
{
/* Unsupported so far:
* $M (Metadata) Packet 0x4D24
* $P (Packet-Pair) Packet 0x5024
* $T (Test Data Notification) Packet 0x5424
*/
msg_Err( p_access, "unrecognized chunk FATAL (0x%x)", p_ck->i_type );
return VLC_EGENERIC;
}
if( (p_ck->i_data > 0) &&
(vlc_tls_Read( p_sys->stream, &p_sys->buffer[12], p_ck->i_data,
true ) < p_ck->i_data) )
{
msg_Err( p_access, "cannot read data 4" );
return VLC_EGENERIC;
}
#if 0
if( (p_sys->i_packet_sequence != 0) &&
(p_ck->i_sequence != p_sys->i_packet_sequence) )
{
msg_Warn( p_access, "packet lost ? (%d != %d)", p_ck->i_sequence, p_sys->i_packet_sequence );
}
#endif
p_sys->i_packet_sequence = p_ck->i_sequence + 1;
p_sys->i_packet_used = 0;
p_sys->i_packet_length = p_ck->i_data;
p_sys->p_packet = p_ck->p_data;
return VLC_SUCCESS;
}