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Commit 8b82ac46 authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont
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Various RTSP conformance fixes: 

 - specify server_port and, if needed, source
 - check for unsupported options
 - use proper default values
 - try transport successively until one works (untested!)
parent 50fc1704
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Showing with 183 additions and 76 deletions
modules/stream_out/rtp.c
View file @ 8b82ac46
......@@ -1756,25 +1756,48 @@ static int RtspCallback( httpd_callback_sys_t *p_args,
return VLC_SUCCESS;
}
/** Finds the next transport choice */
static inline const char *transport_next( const char *str )
{
/* Looks for comma */
str = strchr( str, ',' );
if( str == NULL )
return NULL; /* No more transport options */
str++; /* skips comma */
while( strchr( "\r\n\t ", *str ) )
str++;
return (*str) ? str : NULL;
}
/** Finds the next transport parameter */
static inline const char *parameter_next( const char *str )
{
while( strchr( ",;", *str ) == NULL )
str++;
return (*str == ';') ? (str + 1) : NULL;
}
static int RtspCallbackId( httpd_callback_sys_t *p_args,
httpd_client_t *cl,
httpd_message_t *answer, httpd_message_t *query )
httpd_client_t *cl,
httpd_message_t *answer, httpd_message_t *query )
{
sout_stream_id_t *id = (sout_stream_id_t*)p_args;
sout_stream_t *p_stream = id->p_stream;
sout_stream_sys_t *p_sys = p_stream->p_sys;
char psz_session_init[100];
const char *psz_session = NULL;
const char *psz_cseq = NULL;
char psz_session_init[21];
const char *psz_session;
const char *psz_cseq;
if( answer == NULL || query == NULL )
return VLC_SUCCESS;
//fprintf( stderr, "RtspCallback query: type=%d\n", query->i_type );
/* */
snprintf( psz_session_init, sizeof(psz_session_init), "%d", rand() );
/* */
answer->i_proto = HTTPD_PROTO_RTSP;
answer->i_version= query->i_version;
......@@ -1782,6 +1805,15 @@ static int RtspCallbackId( httpd_callback_sys_t *p_args,
answer->i_body = 0;
answer->p_body = NULL;
/* Create new session ID if needed */
psz_session = httpd_MsgGet( query, "Session" );
if( psz_session == NULL )
{
/* FIXME: should be somewhat secure randomness */
snprintf( psz_session_init, sizeof(psz_session_init), I64Fd,
NTPtime64() + rand() );
}
if( httpd_MsgGet( query, "Require" ) != NULL )
answer->i_status = 551;
else
......@@ -1789,92 +1821,167 @@ static int RtspCallbackId( httpd_callback_sys_t *p_args,
{
case HTTPD_MSG_SETUP:
{
const char *psz_transport = httpd_MsgGet( query, "Transport" );
if( psz_transport == NULL )
{
answer->i_status = 461;
break;
}
//fprintf( stderr, "HTTPD_MSG_SETUP: transport=%s\n", psz_transport );
if( strstr( psz_transport, "multicast" ) && id->psz_destination )
{
//fprintf( stderr, "HTTPD_MSG_SETUP: multicast\n" );
answer->i_status = 200;
psz_session = httpd_MsgGet( query, "Session" );
if( !psz_session )
psz_session = psz_session_init;
answer->i_status = 461;
httpd_MsgAdd( answer, "Transport",
"RTP/AVP/UDP;destination=%s;port=%d-%d;ttl=%d",
id->psz_destination, id->i_port,id->i_port+1,
p_sys->i_ttl > 0 ? p_sys->i_ttl : 1);
}
else if( strstr( psz_transport, "unicast" ) && strstr( psz_transport, "client_port=" ) )
for( const char *tpt = httpd_MsgGet( query, "Transport" );
tpt != NULL;
tpt = transport_next( tpt ) )
{
int i_port = atoi( strstr( psz_transport, "client_port=" ) + strlen("client_port=") );
char ip[NI_MAXNUMERICHOST], psz_access[22], psz_url[NI_MAXNUMERICHOST + 8];
vlc_bool_t b_multicast = VLC_TRUE, b_unsupp = VLC_FALSE;
unsigned loport = 5004, hiport = 5005; /* from RFC3551 */
sout_access_out_t *p_access;
rtsp_client_t *rtsp = NULL;
/* Check transport protocol. */
/* Currently, we only support RTP/AVP over UDP */
if( strncmp( tpt, "RTP/AVP", 7 ) )
continue;
tpt += 7;
if( strncmp( tpt, "/UDP", 4 ) == 0 )
tpt += 4;
if( strchr( ";,", *tpt ) == NULL )
continue;
if( httpd_ClientIP( cl, ip ) == NULL )
/* Parse transport options */
for( const char *opt = parameter_next( tpt );
opt != NULL;
opt = parameter_next( opt ) )
{
answer->i_status = 500;
break;
if( strncmp( opt, "multicast", 9 ) == 0)
b_multicast = VLC_TRUE;
else
if( strncmp( opt, "unicast", 7 ) == 0 )
b_multicast = VLC_FALSE;
else
if( sscanf( opt, "client_port=%u-%u", &loport, &hiport ) == 2 )
;
else
if( strncmp( opt, "mode=", 5 ) == 0 )
{
if( strncasecmp( opt + 5, "\"PLAY\"", 6 ) )
{
/* Not playing?! */
b_unsupp = VLC_TRUE;
break;
}
}
else
{
/*
* Every other option is unsupported:
*
* "source" and "append" are invalid.
*
* For multicast, "port", "layers", "ttl" are set by the
* stream output configuration.
*
* For unicast, we do not allow "destination" as it
* carries a DoS risk, and we decide on "server_port".
*
* "interleaved" and "ssrc" are not implemented.
*/
b_unsupp = VLC_TRUE;
break;
}
}
//fprintf( stderr, "HTTPD_MSG_SETUP: unicast ip=%s port=%d\n", ip, i_port );
if( b_unsupp )
continue;
psz_session = httpd_MsgGet( query, "Session" );
if( !psz_session )
if( b_multicast )
{
psz_session = psz_session_init;
rtsp = RtspClientNew( p_stream, psz_session_init );
if( id->psz_destination == NULL )
continue;
answer->i_status = 200;
httpd_MsgAdd( answer, "Transport",
"RTP/AVP/UDP;destination=%s;port=%d-%d;ttl=%d",
id->psz_destination, id->i_port, id->i_port+1,
( p_sys->i_ttl > 0 ) ? p_sys->i_ttl : 1 );
}
else
{
rtsp = RtspClientGet( p_stream, psz_session );
if( rtsp == NULL )
char ip[NI_MAXNUMERICHOST], psz_access[22],
url[NI_MAXNUMERICHOST + 8];
sout_access_out_t *p_access;
rtsp_client_t *rtsp = NULL;
if( ( hiport - loport ) > 1 )
continue;
if( psz_session == NULL )
{
answer->i_status = 454;
break;
psz_session = psz_session_init;
rtsp = RtspClientNew( p_stream, psz_session );
}
else
{
/* FIXME: we probably need to remove an access out,
* if there is already one for the same ID */
rtsp = RtspClientGet( p_stream, psz_session );
if( rtsp == NULL )
{
answer->i_status = 454;
continue;
}
}
}
/* first try to create the access out */
if( p_sys->i_ttl )
snprintf( psz_access, sizeof( psz_access ),
"udp{raw,rtcp,ttl=%d}", p_sys->i_ttl );
else
strcpy( psz_access, "udp{raw,rtcp}" );
if( httpd_ClientIP( cl, ip ) == NULL )
{
answer->i_status = 500;
continue;
}
snprintf( psz_url, sizeof( psz_url ),
( strchr( ip, ':' ) != NULL ) ? "[%s]:%d" : "%s:%d",
ip, i_port );
if( p_sys->i_ttl )
snprintf( psz_access, sizeof( psz_access ),
"udp{raw,rtcp,ttl=%d}", p_sys->i_ttl );
else
strcpy( psz_access, "udp{raw,rtcp}" );
if( ( p_access = sout_AccessOutNew( p_stream->p_sout, psz_access, psz_url ) ) == NULL )
{
msg_Err( p_stream, "cannot create the access out for %s://%s",
psz_access, psz_url );
answer->i_status = 500;
break;
}
snprintf( url, sizeof( url ),
( strchr( ip, ':' ) != NULL ) ? "[%s]:%d" : "%s:%d",
ip, loport );
TAB_APPEND( rtsp->i_id, rtsp->id, id );
TAB_APPEND( rtsp->i_access, rtsp->access, p_access );
p_access = sout_AccessOutNew( p_stream->p_sout,
psz_access, url );
if( p_access == NULL )
{
msg_Err( p_stream,
"cannot create access output for %s://%s",
psz_access, url );
answer->i_status = 500;
break;
}
answer->i_status = 200;
TAB_APPEND( rtsp->i_id, rtsp->id, id );
TAB_APPEND( rtsp->i_access, rtsp->access, p_access );
httpd_MsgAdd( answer, "Transport",
"RTP/AVP/UDP;client_port=%d-%d", i_port, i_port + 1 );
}
else /* TODO strstr( psz_transport, "interleaved" ) ) */
{
answer->i_status = 461;
char *src = var_GetNonEmptyString (p_access, "src-addr");
int sport = var_GetInteger (p_access, "src-port");
httpd_ServerIP( cl, ip );
fprintf( stderr, "src = %s, ip = %s\n", src, ip );
if( ( src != NULL ) && strcmp( src, ip ) )
{
/* Specify source IP if it is different from the RTSP
* control connection server address */
httpd_MsgAdd( answer, "Transport",
"RTP/AVP/UDP;unicast;source=%s;"
"client_port=%u-%u;server_port=%u-%u",
src, loport, hiport, sport, sport + 1 );
}
else
{
httpd_MsgAdd( answer, "Transport",
"RTP/AVP/UDP;unicast;"
"client_port=%u-%u;server_port=%u-%u",
loport, hiport, sport, sport + 1 );
}
answer->i_status = 200;
free( src );
}
break;
}
break;
}
......@@ -1886,7 +1993,7 @@ static int RtspCallbackId( httpd_callback_sys_t *p_args,
return VLC_EGENERIC;
}
httpd_MsgAdd( answer, "Server", "VLC Server" );
httpd_MsgAdd( answer, "Server", PACKAGE_STRING );
httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
psz_cseq = httpd_MsgGet( query, "Cseq" );
httpd_MsgAdd( answer, "Cseq", "%s", psz_cseq ? psz_cseq : "0");
......
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