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vlc/modules/access/mms/mmsh.c

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/*****************************************************************************
* mmsh.c:
*****************************************************************************
* Copyright (C) 2001, 2002 the VideoLAN team
* $Id$
*
* 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 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., 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_network.h>
#include <vlc_url.h>
#include "asf.h"
#include "buffer.h"
#include "mms.h"
#include "mmsh.h"
/* TODO:
* - authentication
*/
/*****************************************************************************
* Local prototypes
*****************************************************************************/
int MMSHOpen ( access_t * );
void MMSHClose ( access_t * );
static block_t *Block( access_t *p_access );
static ssize_t ReadRedirect( access_t *, uint8_t *, size_t );
static int Seek( access_t *, int64_t );
static int Control( access_t *, int, va_list );
static int Describe( access_t *, char **ppsz_location );
static int Start( access_t *, int64_t );
static void Stop( access_t * );
static int GetPacket( access_t *, chunk_t * );
static void GetHeader( access_t *p_access );
static int Restart( access_t * );
static int Reset( access_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( access_t *p_access )
{
access_sys_t *p_sys;
char *psz_location = NULL;
char *psz_proxy;
STANDARD_BLOCK_ACCESS_INIT
p_sys->i_proto= MMS_PROTO_HTTP;
p_sys->fd = -1;
/* Handle proxy */
p_sys->b_proxy = false;
memset( &p_sys->proxy, 0, sizeof(p_sys->proxy) );
/* Check proxy */
/* TODO reuse instead http-proxy from http access ? */
psz_proxy = var_CreateGetString( p_access, "mmsh-proxy" );
if( !*psz_proxy )
{
char *psz_http_proxy = config_GetPsz( p_access, "http-proxy" );
if( psz_http_proxy && *psz_http_proxy )
{
free( psz_proxy );
psz_proxy = psz_http_proxy;
var_SetString( p_access, "mmsh-proxy", psz_proxy );
}
else
{
free( psz_http_proxy );
}
}
if( *psz_proxy )
{
p_sys->b_proxy = true;
vlc_UrlParse( &p_sys->proxy, psz_proxy, 0 );
}
#ifdef HAVE_GETENV
else
{
char *psz_proxy = getenv( "http_proxy" );
if( psz_proxy && *psz_proxy )
{
p_sys->b_proxy = true;
vlc_UrlParse( &p_sys->proxy, psz_proxy, 0 );
}
}
#endif
free( psz_proxy );
if( p_sys->b_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_path, 0 );
if( ( p_sys->url.psz_host == NULL ) ||
( *p_sys->url.psz_host == '\0' ) )
{
msg_Err( p_access, "invalid host" );
vlc_UrlClean( &p_sys->proxy );
vlc_UrlClean( &p_sys->url );
free( p_sys );
return VLC_EGENERIC;
}
if( p_sys->url.i_port <= 0 )
p_sys->url.i_port = 80;
if( Describe( p_access, &psz_location ) )
{
vlc_UrlClean( &p_sys->proxy );
vlc_UrlClean( &p_sys->url );
free( p_sys );
return VLC_EGENERIC;
}
/* Handle redirection */
if( psz_location && *psz_location )
{
msg_Dbg( p_access, "redirection to %s", psz_location );
input_thread_t * p_input = vlc_object_find( p_access, VLC_OBJECT_INPUT, FIND_PARENT );
input_item_t * p_new_loc;
if( !p_input )
{
vlc_UrlClean( &p_sys->proxy );
vlc_UrlClean( &p_sys->url );
free( p_sys );
free( psz_location );
return VLC_EGENERIC;
}
/** \bug we do not autodelete here */
p_new_loc = input_item_New( p_access, psz_location, psz_location );
input_item_AddSubItem( input_GetItem( p_input ), p_new_loc );
vlc_gc_decref( p_new_loc );
vlc_object_release( p_input );
free( psz_location );
p_access->pf_block = NULL;
p_access->pf_read = ReadRedirect;
return VLC_SUCCESS;
}
free( psz_location );
/* Start playing */
if( Start( p_access, 0 ) )
{
msg_Err( p_access, "cannot start stream" );
free( p_sys->p_header );
vlc_UrlClean( &p_sys->proxy );
vlc_UrlClean( &p_sys->url );
free( p_sys );
return VLC_EGENERIC;
}
if( !p_sys->b_broadcast )
{
p_access->info.i_size = p_sys->asfh.i_file_size;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: free unused data structures
*****************************************************************************/
void MMSHClose ( access_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
Stop( p_access );
free( p_sys->p_header );
vlc_UrlClean( &p_sys->proxy );
vlc_UrlClean( &p_sys->url );
free( p_sys );
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( access_t *p_access, int i_query, va_list args )
{
access_sys_t *p_sys = p_access->p_sys;
bool *pb_bool;
bool b_bool;
int64_t *pi_64;
int i_int;
switch( i_query )
{
/* */
case ACCESS_CAN_SEEK:
pb_bool = (bool*)va_arg( args, bool* );
*pb_bool = !p_sys->b_broadcast;
break;
case ACCESS_CAN_FASTSEEK:
pb_bool = (bool*)va_arg( args, bool* );
*pb_bool = false;
break;
case ACCESS_CAN_PAUSE:
case ACCESS_CAN_CONTROL_PACE:
pb_bool = (bool*)va_arg( args, bool* );
*pb_bool = true;
break;
/* */
case ACCESS_GET_PTS_DELAY:
pi_64 = (int64_t*)va_arg( args, int64_t * );
*pi_64 = (int64_t)var_GetInteger( p_access, "mms-caching" ) * INT64_C(1000);
break;
case ACCESS_GET_PRIVATE_ID_STATE:
i_int = (int)va_arg( args, int );
pb_bool = (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 ACCESS_SET_PAUSE_STATE:
b_bool = (bool)va_arg( args, int );
if( b_bool )
Stop( p_access );
else
Seek( p_access, p_access->info.i_pos );
break;
case ACCESS_GET_TITLE_INFO:
case ACCESS_SET_TITLE:
case ACCESS_SET_SEEKPOINT:
case ACCESS_SET_PRIVATE_ID_STATE:
case ACCESS_GET_CONTENT_TYPE:
return VLC_EGENERIC;
default:
msg_Warn( p_access, "unimplemented query in control" );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Seek: try to go at the right place
*****************************************************************************/
static int Seek( access_t *p_access, int64_t i_pos )
{
access_sys_t *p_sys = p_access->p_sys;
chunk_t ck;
off_t i_offset;
off_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 );
while( vlc_object_alive (p_access) )
{
if( GetPacket( p_access, &ck ) )
break;
/* skip headers */
if( ck.i_type != 0x4824 )
break;
msg_Warn( p_access, "skipping header" );
}
p_access->info.i_pos = i_pos;
p_access->info.b_eof = false;
p_sys->i_packet_used += i_offset;
return VLC_SUCCESS;
}
/*****************************************************************************
* ReadRedirect:
*****************************************************************************/
static ssize_t ReadRedirect( access_t *p_access, uint8_t *p, size_t i_len )
{
VLC_UNUSED(p_access); VLC_UNUSED(p); VLC_UNUSED(i_len);
return 0;
}
/*****************************************************************************
* Block:
*****************************************************************************/
static block_t *Block( access_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
const unsigned i_packet_min = p_sys->asfh.i_min_data_packet_size;
if( p_access->info.i_pos < p_sys->i_start + p_sys->i_header )
{
const size_t i_offset = p_access->info.i_pos - p_sys->i_start;
const size_t i_copy = p_sys->i_header - i_offset;
block_t *p_block = block_New( p_access, i_copy );
if( !p_block )
return NULL;
memcpy( p_block->p_buffer, &p_sys->p_header[i_offset], i_copy );
p_access->info.i_pos += 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_New( p_access, 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_access->info.i_pos += 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 )
{
p_access->info.b_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( access_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_access->info.i_pos;
/* */
msg_Dbg( p_access, "stoping 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;
}
/* */
if( Start( p_access, 0 ) )
{
msg_Err( p_access, "Start failed" );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
static int Reset( access_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_access->info.i_pos;
/* */
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 );
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_CreateGetInteger( p_access, "mms-maxbitrate" ),
var_CreateGetInteger( p_access, "mms-all" ),
var_CreateGetInteger( p_access, "audio" ),
var_CreateGetInteger( 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 int OpenConnection( access_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
vlc_url_t srv = p_sys->b_proxy ? p_sys->proxy : p_sys->url;
if( ( p_sys->fd = net_ConnectTCP( p_access,
srv.psz_host, srv.i_port ) ) < 0 )
{
msg_Err( p_access, "cannot connect to %s:%d",
srv.psz_host, srv.i_port );
return VLC_EGENERIC;
}
if( p_sys->b_proxy )
{
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"GET http://%s:%d%s HTTP/1.0\r\n",
p_sys->url.psz_host, p_sys->url.i_port,
( (p_sys->url.psz_path == NULL) ||
(*p_sys->url.psz_path == '\0') ) ?
"/" : p_sys->url.psz_path );
/* Proxy Authentication */
if( p_sys->proxy.psz_username && *p_sys->proxy.psz_username )
{
char *buf;
char *b64;
if( asprintf( &buf, "%s:%s", p_sys->proxy.psz_username,
p_sys->proxy.psz_password ? p_sys->proxy.psz_password : "" ) == -1 )
return VLC_ENOMEM;
b64 = vlc_b64_encode( buf );
free( buf );
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"Proxy-Authorization: Basic %s\r\n", b64 );
free( b64 );
}
}
else
{
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"GET %s HTTP/1.0\r\n"
"Host: %s:%d\r\n",
( (p_sys->url.psz_path == NULL) ||
(*p_sys->url.psz_path == '\0') ) ?
"/" : p_sys->url.psz_path,
p_sys->url.psz_host, p_sys->url.i_port );
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Describe:
*****************************************************************************/
static int Describe( access_t *p_access, char **ppsz_location )
{
access_sys_t *p_sys = p_access->p_sys;
char *psz_location = NULL;
char *psz;
int i_code;
/* 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 );
if( OpenConnection( p_access ) )
return VLC_EGENERIC;
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"Accept: */*\r\n"
"User-Agent: "MMSH_USER_AGENT"\r\n"
"Pragma: no-cache,rate=1.000000,stream-time=0,stream-offset=0:0,request-context=%d,max-duration=0\r\n"
"Pragma: xClientGUID={"GUID_FMT"}\r\n"
"Connection: Close\r\n",
p_sys->i_request_context++,
GUID_PRINT( p_sys->guid ) );
if( net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL, "\r\n" ) < 0 )
{
msg_Err( p_access, "failed to send request" );
goto error;
}
/* Receive the http header */
if( ( psz = net_Gets( p_access, p_sys->fd, NULL ) ) == 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( ;; )
{
char *psz = net_Gets( p_access, p_sys->fd, NULL );
char *p;
if( psz == NULL )
{
msg_Err( p_access, "failed to read answer" );
goto error;
}
if( *psz == '\0' )
{
free( psz );
break;
}
if( ( p = strchr( psz, ':' ) ) == NULL )
{
msg_Err( p_access, "malformed header line: %s", psz );
free( psz );
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, "unknow stream types (%s)", p );
p_sys->b_broadcast = false;
}
}
}
else if( !strcasecmp( psz, "Location" ) )
{
psz_location = strdup( p );
}
free( psz );
}
/* Handle the redirection */
if( ( (i_code == 301) || (i_code == 302) ||
(i_code == 303) || (i_code == 307) ) &&
psz_location && *psz_location )
{
msg_Dbg( p_access, "redirection to %s", psz_location );
net_Close( p_sys->fd ); p_sys->fd = -1;
*ppsz_location = psz_location;
return VLC_SUCCESS;
}
/* Read the asf header */
GetHeader( p_access );
if( p_sys->i_header <= 0 )
{
msg_Err( p_access, "header size == 0" );
goto error;
}
/* close this connection */
net_Close( p_sys->fd );
p_sys->fd = -1;
/* *** 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_CreateGetInteger( p_access, "mms-maxbitrate" ),
var_CreateGetInteger( p_access, "mms-all" ),
var_CreateGetInteger( p_access, "audio" ),
var_CreateGetInteger( p_access, "video" ) );
return VLC_SUCCESS;
error:
if( p_sys->fd > 0 )
{
net_Close( p_sys->fd );
p_sys->fd = -1;
}
return VLC_EGENERIC;
}
static void GetHeader( access_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
/* Read the asf header */
p_sys->i_header = 0;
free( p_sys->p_header );
p_sys->p_header = NULL;
for( ;; )
{
chunk_t ck;
if( GetPacket( p_access, &ck ) || ck.i_type != 0x4824 )
break;
if( ck.i_data > 0 )
{
p_sys->i_header += ck.i_data;
p_sys->p_header = realloc( 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( access_t *p_access, int64_t i_pos )
{
access_sys_t *p_sys = p_access->p_sys;
int i_streams = 0;
int i_streams_selected = 0;
int i;
char *psz = NULL;
msg_Dbg( p_access, "starting stream" );
for( i = 1; i < 128; i++ )
{
if( p_sys->asfh.stream[i].i_cat == ASF_STREAM_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;
}
if( OpenConnection( p_access ) )
return VLC_EGENERIC;
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"Accept: */*\r\n"
"User-Agent: "MMSH_USER_AGENT"\r\n" );
if( p_sys->b_broadcast )
{
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"Pragma: no-cache,rate=1.000000,request-context=%d\r\n",
p_sys->i_request_context++ );
}
else
{
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"Pragma: no-cache,rate=1.000000,stream-time=0,stream-offset=%u:%u,request-context=%d,max-duration=0\r\n",
(uint32_t)((i_pos >> 32)&0xffffffff),
(uint32_t)(i_pos&0xffffffff),
p_sys->i_request_context++ );
}
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"Pragma: xPlayStrm=1\r\n"
"Pragma: xClientGUID={"GUID_FMT"}\r\n"
"Pragma: stream-switch-count=%d\r\n"
"Pragma: stream-switch-entry=",
GUID_PRINT( p_sys->guid ),
i_streams);
for( i = 1; i < 128; i++ )
{
if( p_sys->asfh.stream[i].i_cat != ASF_STREAM_UNKNOWN )
{
int i_select = 2;
if( p_sys->asfh.stream[i].i_selected )
{
i_select = 0;
}
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"ffff:%d:%d ", i, i_select );
}
}
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL, "\r\n" );
net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL,
"Connection: Close\r\n" );
if( net_Printf( VLC_OBJECT(p_access), p_sys->fd, NULL, "\r\n" ) < 0 )
{
msg_Err( p_access, "failed to send request" );
return VLC_EGENERIC;
}
psz = net_Gets( p_access, p_sys->fd, NULL );
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( ;; )
{
char *psz = net_Gets( p_access, p_sys->fd, NULL );
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( access_t *p_access )
{
access_sys_t *p_sys = p_access->p_sys;
msg_Dbg( p_access, "closing stream" );
if( p_sys->fd > 0 )
{
net_Close( p_sys->fd );
p_sys->fd = -1;
}
}
/*****************************************************************************
* get packet
*****************************************************************************/
static int GetPacket( access_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( net_Read( p_access, p_sys->fd, NULL, 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( net_Read( p_access, p_sys->fd, NULL, 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 ) // Transfer complete
{
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 )
{
/* 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) )
{
msg_Err( p_access, "invalid chunk FATAL (0x%x)", p_ck->i_type );
return VLC_EGENERIC;
}
if( (p_ck->i_data > 0) &&
(net_Read( p_access, p_sys->fd, NULL, &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;
}