* sap.c : SAP interface module
*****************************************************************************
* Copyright (C) 2004-2005 the VideoLAN team
+ * Copyright © 2007 Rémi Denis-Courmont
* $Id$
*
* Authors: Clément Stenac <zorglub@videolan.org>
+ * Rémi Denis-Courmont
*
* 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
/*****************************************************************************
* Includes
*****************************************************************************/
-#define _GNU_SOURCE
-#include <stdlib.h> /* malloc(), free() */
-
#include <vlc/vlc.h>
+#include <assert.h>
+
#include <vlc_playlist.h>
#include <vlc_demux.h>
# include <zlib.h>
#endif
+#ifndef WIN32
+# include <net/if.h>
+#endif
+
/************************************************************************
* Macros and definitions
************************************************************************/
#define SAP_V4_LINK_ADDRESS "224.0.0.255"
#define ADD_SESSION 1
-#define SAP_V6_1 "FF0"
-/* Scope is inserted between them */
-#define SAP_V6_2 "::2:7FFE"
-/* See RFC3513 for list of valid scopes */
-/* FIXME: find a way to listen to link-local scope */
-static const char ipv6_scopes[] = "1456789ABCDE";
-
-
/*****************************************************************************
* Module descriptor
*****************************************************************************/
"can specify a specific address." )
#define SAP_IPV4_TEXT N_( "IPv4 SAP" )
#define SAP_IPV4_LONGTEXT N_( \
- "Listen to IPv4 announcements " \
- "on the standard address." )
+ "Listen to IPv4 announcements on the standard addresses." )
#define SAP_IPV6_TEXT N_( "IPv6 SAP" )
#define SAP_IPV6_LONGTEXT N_( \
- "Listen to IPv6 announcements " \
- "on the standard addresses." )
+ "Listen to IPv6 announcements on the standard addresses." )
#define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
#define SAP_SCOPE_LONGTEXT N_( \
"Scope for IPv6 announcements (default is 8)." )
set_callbacks( Open, Close );
add_submodule();
- set_description( _("SDP file parser for UDP") );
+ set_description( _("SDP Descriptions parser") );
add_shortcut( "sdp" );
set_capability( "demux2", 51 );
set_callbacks( OpenDemux, CloseDemux );
typedef struct attribute_t attribute_t;
typedef struct sap_announce_t sap_announce_t;
+
+struct sdp_media_t
+{
+ struct sdp_t *parent;
+ char *fmt;
+ struct sockaddr_storage addr;
+ socklen_t addrlen;
+ unsigned n_addr;
+ int i_attributes;
+ attribute_t **pp_attributes;
+};
+
+
/* The structure that contains sdp information */
struct sdp_t
{
- char *psz_sdp;
+ const char *psz_sdp;
+
+ /* o field */
+ char username[64];
+ uint64_t session_id;
+ uint64_t session_version;
+ unsigned orig_ip_version;
+ char orig_host[1024];
/* s= field */
char *psz_sessionname;
- /* Raw m= and c= fields */
- char *psz_connection;
- char *psz_media;
-
- /* o field */
- char *psz_username;
- char *psz_network_type;
- char *psz_address_type;
- char *psz_address;
- int64_t i_session_id;
-
+ /* old cruft */
/* "computed" URI */
char *psz_uri;
-
- int i_in; /* IP version */
-
- int i_media;
int i_media_type;
+ /* a= global attributes */
int i_attributes;
attribute_t **pp_attributes;
+
+ /* medias (well, we only support one atm) */
+ unsigned mediac;
+ struct sdp_media_t *mediav;
};
struct attribute_t
{
- char *psz_field;
- char *psz_value;
+ const char *value;
+ char name[0];
};
struct sap_announce_t
sdp_t *p_sdp;
int i_input_id;
- int i_item_id_cat;
- int i_item_id_one;
};
struct services_discovery_sys_t
int i_fd;
int *pi_fd;
- /* playlist node */
- playlist_item_t *p_node_cat;
- playlist_item_t *p_node_one;
-
/* Table of announces */
int i_announces;
struct sap_announce_t **pp_announces;
static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
/* Helper functions */
- static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
+ static inline attribute_t *MakeAttribute (const char *str);
+ static const char *GetAttribute (attribute_t **tab, unsigned n, const char *name);
+ static inline void FreeAttribute (attribute_t *a);
+ static const char *FindAttribute (const sdp_t *sdp, unsigned media,
+ const char *name);
+
static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
static int InitSocket( services_discovery_t *p_sd, const char *psz_address, int i_port );
static int Decompress( const unsigned char *psz_src, unsigned char **_dst, int i_len );
#endif
/* Cache sap_timeshift value */
- p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
- ? VLC_TRUE : VLC_FALSE;
+ p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" );
- /* Create our playlist node */
- pl_Yield( p_sd );
+ /* Set our name */
+ services_discovery_SetLocalizedName( p_sd, _("SAP") );
- playlist_NodesPairCreate( pl_Get( p_sd ), _("SAP sessions"),
- &p_sys->p_node_cat, &p_sys->p_node_one,
- VLC_TRUE );
- p_sys->p_node_cat->p_input->b_prefers_tree = VLC_TRUE;
p_sys->i_announces = 0;
p_sys->pp_announces = NULL;
static int OpenDemux( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t *)p_this;
- uint8_t *p_peek;
- int i_max_sdp = 1024;
- int i_sdp = 0;
+ const uint8_t *p_peek;
char *psz_sdp = NULL;
sdp_t *p_sdp = NULL;
+ int errval = VLC_EGENERIC;
+ size_t i_len;
if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
{
return VLC_EGENERIC;
}
- /* Probe for SDP */
- if( p_demux->s )
- {
- if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
+ assert( p_demux->s ); /* this is NOT an access_demux */
- if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
- strncmp( (char*)p_peek, "v=0\n", 4 ) &&
- ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
- {
- return VLC_EGENERIC;
- }
- }
+ /* Probe for SDP */
+ if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 )
+ return VLC_EGENERIC;
- psz_sdp = (char *)malloc( i_max_sdp );
- if( !psz_sdp ) return VLC_EGENERIC;
+ if( memcmp( p_peek, "v=0\r\no=", 7 ) && memcmp( p_peek, "v=0\no=", 6 ) )
+ return VLC_EGENERIC;
/* Gather the complete sdp file */
- for( ;; )
+ for( i_len = 0, psz_sdp = NULL; i_len < 65536; )
{
- int i_read = stream_Read( p_demux->s,
- &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
-
- if( i_read < 0 )
+ const int i_read_max = 1024;
+ char *psz_sdp_new = realloc( psz_sdp, i_len + i_read_max );
+ size_t i_read;
+ if( psz_sdp_new == NULL )
{
- msg_Err( p_demux, "failed to read SDP" );
+ errval = VLC_ENOMEM;
goto error;
}
+ psz_sdp = psz_sdp_new;
- i_sdp += i_read;
-
- if( i_read < i_max_sdp - i_sdp - 1 )
+ i_read = stream_Read( p_demux->s, &psz_sdp[i_len], i_read_max );
+ if( i_read < 0 )
{
- psz_sdp[i_sdp] = '\0';
- break;
+ msg_Err( p_demux, "cannot read SDP" );
+ goto error;
}
+ i_len += i_read;
- i_max_sdp += 1000;
- psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
+ psz_sdp[i_len] = '\0';
+
+ if( i_read < i_read_max )
+ break; // EOF
}
p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
goto error;
}
- if( p_sdp->i_media > 1 )
- {
- goto error;
- }
-
if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
{
p_sdp->psz_uri = NULL;
FREENULL( psz_sdp );
if( p_sdp ) FreeSDP( p_sdp ); p_sdp = NULL;
stream_Seek( p_demux->s, 0 );
- return VLC_EGENERIC;
+ return errval;
}
/*****************************************************************************
}
FREENULL( p_sys->pp_announces );
- playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_cat, VLC_TRUE,
- VLC_TRUE );
- playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_one, VLC_TRUE,
- VLC_TRUE );
pl_Release( p_sd );
free( p_sys );
}
}
if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
{
- char psz_address[] = SAP_V6_1"0"SAP_V6_2;
- const char *c_scope;
+ char psz_address[NI_MAXNUMERICHOST] = "ff02::2:7ffe%";
+
+#ifndef WIN32
+ struct if_nameindex *l = if_nameindex ();
+ if (l != NULL)
+ {
+ char *ptr = strchr (psz_address, '%') + 1;
+ for (unsigned i = 0; l[i].if_index; i++)
+ {
+ strcpy (ptr, l[i].if_name);
+ InitSocket (p_sd, psz_address, SAP_PORT);
+ }
+ if_freenameindex (l);
+ }
+#else
+ /* this is the Winsock2 equivalant of SIOCGIFCONF on BSD stacks,
+ which if_nameindex uses internally anyway */
+
+ // first create a dummy socket to pin down the protocol family
+ SOCKET s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
+ if( s != INVALID_SOCKET )
+ {
+ INTERFACE_INFO ifaces[10]; // Assume there will be no more than 10 IP interfaces
+ size_t len = sizeof(ifaces);
- for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
+ if( SOCKET_ERROR != WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0, &ifaces, len, &len, NULL, NULL) )
+ {
+ unsigned ifcount = len/sizeof(INTERFACE_INFO);
+ char *ptr = strchr (psz_address, '%') + 1;
+ for(unsigned i = 1; i<=ifcount; ++i )
+ {
+ // append link-local zone identifier
+ sprintf(ptr, "%d", i);
+ }
+ }
+ closesocket(s);
+ }
+#endif
+ *strchr (psz_address, '%') = '\0';
+
+ static const char ipv6_scopes[] = "1456789ABCDE";
+ for (const char *c_scope = ipv6_scopes; *c_scope; c_scope++)
{
- psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
+ psz_address[3] = *c_scope;
InitSocket( p_sd, psz_address, SAP_PORT );
}
}
int i_read;
uint8_t p_buffer[MAX_SAP_BUFFER+1];
- i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
+ i_read = net_Select( p_sd, p_sd->p_sys->pi_fd,
p_sd->p_sys->i_fd, p_buffer,
- MAX_SAP_BUFFER, 500000 );
+ MAX_SAP_BUFFER );
/* Check for items that need deletion */
for( i = 0; i < p_sd->p_sys->i_announces; i++ )
return VLC_EGENERIC;
}
- p_parent_input = input_GetItem(p_input);
+ p_parent_input = input_GetItem( p_input );
+
+ input_item_SetURI( p_parent_input, p_sdp->psz_uri );
+ input_item_SetName( p_parent_input, p_sdp->psz_sessionname );
vlc_mutex_lock( &p_parent_input->lock );
- FREENULL( p_parent_input->psz_uri );
- p_parent_input->psz_uri = strdup( p_sdp->psz_uri );
- FREENULL( p_parent_input->psz_name );
- p_parent_input->psz_name = strdup( EnsureUTF8( p_sdp->psz_sessionname ) );
+
p_parent_input->i_type = ITEM_TYPE_NET;
if( p_playlist->status.p_item &&
int newsize = Decompress (buf, &decomp, end - buf);
if (newsize < 0)
{
- msg_Warn( p_sd, "decompression of sap packet failed" );
+ msg_Dbg( p_sd, "decompression of SAP packet failed" );
return VLC_EGENERIC;
}
decomp = realloc (decomp, newsize + 1);
decomp[newsize] = '\0';
-
psz_sdp = (const char *)decomp;
len = newsize;
}
p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
if( p_sdp == NULL )
- {
return VLC_EGENERIC;
- }
+
+ p_sdp->psz_sdp = psz_sdp;
/* Decide whether we should add a playlist item for this SDP */
/* Parse connection information (c= & m= ) */
if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
- {
p_sdp->psz_uri = NULL;
- }
/* Multi-media or no-parse -> pass to LIVE.COM */
- if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
- p_sdp->i_media_type != 32 &&
- p_sdp->i_media_type != 33) ||
- p_sd->p_sys->b_parse == VLC_FALSE )
+ if( ( p_sdp->i_media_type != 14
+ && p_sdp->i_media_type != 32
+ && p_sdp->i_media_type != 33)
+ || p_sd->p_sys->b_parse == VLC_FALSE )
{
- if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
- asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
+ free( p_sdp->psz_uri );
+ if (asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp ) == -1)
+ p_sdp->psz_uri = NULL;
}
if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
return VLC_SUCCESS;
}
}
- /* Add item */
- if( p_sdp->i_media > 1 )
- {
- msg_Dbg( p_sd, "passing to liveMedia" );
- }
CreateAnnounce( p_sd, i_hash, p_sdp );
sdp_t *p_sdp )
{
input_item_t *p_input;
- playlist_item_t *p_item, *p_child;
- char *psz_value;
+ const char *psz_value;
sap_announce_t *p_sap = (sap_announce_t *)malloc(
sizeof(sap_announce_t ) );
services_discovery_sys_t *p_sys;
p_sys = p_sd->p_sys;
- EnsureUTF8( p_sdp->psz_sessionname );
p_sap->i_last = mdate();
p_sap->i_hash = i_hash;
p_sap->p_sdp = p_sdp;
if( p_sys->b_timeshift )
input_ItemAddOption( p_input, ":access-filter=timeshift" );
- psz_value = GetAttribute( p_sap->p_sdp, "tool" );
+ psz_value = GetAttribute( p_sap->p_sdp->pp_attributes, p_sap->p_sdp->i_attributes, "tool" );
if( psz_value != NULL )
{
- input_ItemAddInfo( p_input, _("Session"),_("Tool"), psz_value );
+ input_ItemAddInfo( p_input, _("Session"), _("Tool"), "%s",
+ psz_value );
}
- if( strcmp( p_sdp->psz_username, "-" ) )
+ if( strcmp( p_sdp->username, "-" ) )
{
- input_ItemAddInfo( p_input, _("Session"),
- _("User"), p_sdp->psz_username );
+ input_ItemAddInfo( p_input, _("Session"), _("User"), "%s",
+ p_sdp->username );
}
/* Handle group */
- psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
- if( psz_value == NULL )
- psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
-
- if( psz_value != NULL )
- {
- EnsureUTF8( psz_value );
-
- p_child = playlist_ChildSearchName( p_sys->p_node_cat, psz_value );
-
- if( p_child == NULL )
- {
- p_child = playlist_NodeCreate( pl_Get( p_sd ), psz_value,
- p_sys->p_node_cat );
- p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
- }
- }
+ if (p_sap->p_sdp->mediac >= 1)
+ psz_value = FindAttribute (p_sap->p_sdp, 0, "x-plgroup");
else
- {
- p_child = p_sys->p_node_cat;
- }
-
- p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input, p_child,
- PLAYLIST_APPEND, PLAYLIST_END );
- p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
- p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
- p_sap->i_item_id_cat = p_item->i_id;
+ psz_value = GetAttribute( p_sap->p_sdp->pp_attributes, p_sap->p_sdp->i_attributes, "x-plgroup" );
- p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input,
- p_sys->p_node_one, PLAYLIST_APPEND, PLAYLIST_END );
- p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
- p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
- p_sap->i_item_id_one = p_item->i_id;
+ services_discovery_AddItem( p_sd, p_input, psz_value /* category name */ );
TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
return p_sap;
}
-static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
-{
- int i;
- for( i = 0 ; i< p_sdp->i_attributes; i++ )
- {
- if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
- strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
- {
- return p_sdp->pp_attributes[i]->psz_value;
- }
- }
- return NULL;
+static const char *FindAttribute (const sdp_t *sdp, unsigned media,
+ const char *name)
+{
+ /* Look for media attribute, and fallback to session */
+ return GetAttribute (sdp->mediav[media].pp_attributes,
+ sdp->mediav[media].i_attributes, name)
+ ?: GetAttribute (sdp->pp_attributes, sdp->i_attributes, name);
}
/* Fill p_sdp->psz_uri */
static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
{
- char *psz_eof = NULL;
- char *psz_parse = NULL;
- char psz_uri[1026];
- char *psz_proto = NULL;
- int i_port = 0;
-
- /* Parse c= field */
- if( p_sdp->psz_connection )
+ if (p_sdp->mediac == 0)
{
- char hostname[1024];
- int ipv;
+ msg_Dbg (p_obj, "Ignoring SDP with no media");
+ return VLC_EGENERIC;
+ }
- /*
- * NOTE: we ignore the TTL parameter on-purpose, as some SAP
- * advertisers don't include it (and it is utterly useless).
- */
- if (sscanf (p_sdp->psz_connection, "IN IP%d %1023[^/]", &ipv,
- hostname) != 2)
+ for (unsigned i = 1; i < p_sdp->mediac; i++)
+ {
+ if ((p_sdp->mediav[i].n_addr != p_sdp->mediav->n_addr)
+ || (p_sdp->mediav[i].addrlen != p_sdp->mediav->addrlen)
+ || memcmp (&p_sdp->mediav[i].addr, &p_sdp->mediav->addr,
+ p_sdp->mediav->addrlen))
{
- msg_Warn (p_obj, "unable to parse c field: \"%s\"",
- p_sdp->psz_connection);
+ msg_Dbg (p_obj, "Multiple media ports not supported -> live555");
return VLC_EGENERIC;
}
+ }
- switch (ipv)
- {
- case 4:
- case 6:
- break;
+ if (p_sdp->mediav->n_addr != 1)
+ {
+ msg_Dbg (p_obj, "Layered encoding not supported -> live555");
+ return VLC_EGENERIC;
+ }
- default:
- msg_Warn (p_obj, "unknown IP version %d", ipv);
- return VLC_EGENERIC;
- }
+ char psz_uri[1026];
+ const char *host;
+ int port;
- if (strchr (hostname, ':') != NULL)
- sprintf (psz_uri, "[%s]", hostname);
- else
- strcpy (psz_uri, hostname);
+ psz_uri[0] = '[';
+ if (vlc_getnameinfo ((struct sockaddr *)&(p_sdp->mediav->addr),
+ p_sdp->mediav->addrlen, psz_uri + 1,
+ sizeof (psz_uri) - 2, &port, NI_NUMERICHOST))
+ return VLC_EGENERIC;
+
+ if (strchr (psz_uri + 1, ':'))
+ {
+ host = psz_uri;
+ psz_uri[strlen (psz_uri)] = ']';
}
+ else
+ host = psz_uri + 1;
/* Parse m= field */
- if( p_sdp->psz_media )
+ char *sdp_proto = strdup (p_sdp->mediav[0].fmt);
+ if (sdp_proto == NULL)
+ return VLC_ENOMEM;
+
+ char *subtype = strchr (sdp_proto, ' ');
+ if (subtype == NULL)
{
- psz_parse = p_sdp->psz_media;
+ msg_Dbg (p_obj, "missing SDP media subtype: %s", sdp_proto);
+ p_sdp->i_media_type = 0;
+ }
+ else
+ {
+ *subtype++ = '\0';
+ p_sdp->i_media_type = atoi (subtype);
+ }
+ if (p_sdp->i_media_type == 0)
+ p_sdp->i_media_type = 33;
+
+ /* RTP protocol, nul, VLC shortcut, nul, flags byte as follow:
+ * 0x1: Connection-Oriented media. */
+ static const char proto_match[] =
+ "udp\0" "udp\0\0"
+ "RTP/AVP\0" "rtp\0\0"
+ "UDPLite/RTP/AVP\0" "udplite\0\0"
+ "DCCP/RTP/AVP\0" "dccp\0\1"
+ "TCP/RTP/AVP\0" "rtptcp\0\1"
+ "\0";
+
+ const char *vlc_proto = NULL;
+ uint8_t flags = 0;
+ for (const char *proto = proto_match; *proto;)
+ {
+ if (strcasecmp (proto, sdp_proto) == 0)
+ {
+ vlc_proto = proto + strlen (proto) + 1;
+ flags = vlc_proto[strlen (vlc_proto) + 1];
+ break;
+ }
+ proto += strlen (proto) + 1;
+ proto += strlen (proto) + 2;
+ }
- psz_eof = strchr( psz_parse, ' ' );
+ free (sdp_proto);
+ if (vlc_proto == NULL)
+ {
+ msg_Dbg (p_obj, "unknown SDP media protocol: %s",
+ p_sdp->mediav[0].fmt);
+ return VLC_EGENERIC;
+ }
- if( psz_eof )
- {
- *psz_eof = '\0';
-
- /*
- * That's ugly. We should go through every media, and make sure
- * at least one of them is audio or video. In the mean time, I
- * need to accept data too.
- */
- if( strncmp( psz_parse, "audio", 5 )
- && strncmp( psz_parse, "video", 5 )
- && strncmp( psz_parse, "data", 4 ) )
- {
- msg_Warn( p_obj, "unhandled media type \"%s\"", psz_parse );
- return VLC_EGENERIC;
- }
+ if (flags & 1)
+ {
+ /* Connection-oriented media */
+ const char *setup = FindAttribute (p_sdp, 0, "setup");
+ if (setup == NULL)
+ setup = "active"; /* default value */
- psz_parse = psz_eof + 1;
- }
- else
+ if (strcmp (setup, "actpass") && strcmp (setup, "passive"))
{
- msg_Warn( p_obj, "unable to parse m field (1)");
+ msg_Dbg (p_obj, "unsupported COMEDIA mode: %s", setup);
return VLC_EGENERIC;
}
- psz_eof = strchr( psz_parse, ' ' );
+ if (asprintf (&p_sdp->psz_uri, "%s://%s:%d", vlc_proto,
+ host, port) == -1)
+ return VLC_ENOMEM;
+ }
+ else
+ {
+ /* Non-connected (normally multicast) media */
- if( psz_eof )
+ char psz_source[258] = "";
+ const char *sfilter = FindAttribute (p_sdp, 0, "source-filter");
+ if (sfilter != NULL)
{
- *psz_eof = '\0';
-
- /* FIXME : multiple port ! */
- i_port = atoi( psz_parse );
+ char psz_source_ip[256];
+ unsigned ipv;
- if( i_port <= 0 || i_port >= 65536 )
+ if (sscanf (sfilter, " incl IN IP%u %*s %255s ", &ipv,
+ psz_source_ip) == 2)
{
- msg_Warn( p_obj, "invalid transport port %i", i_port );
+ /* According to RFC4570, FQDNs can be used for source-filters,
+ * but -seriously- this is impractical */
+ switch (ipv)
+ {
+#ifdef AF_INET6
+ case 6:
+ {
+ struct in6_addr addr;
+ if ((inet_pton (AF_INET6, psz_source_ip, &addr) > 0)
+ && (inet_ntop (AF_INET6, &addr, psz_source + 1,
+ sizeof (psz_source) - 2) != NULL))
+ {
+ psz_source[0] = '[';
+ psz_source[strlen (psz_source)] = ']';
+ }
+ break;
+ }
+#endif
+ case 4:
+ {
+ struct in_addr addr;
+ if ((inet_pton (AF_INET, psz_source_ip, &addr) > 0)
+ && (inet_ntop (AF_INET, &addr, psz_source,
+ sizeof (psz_source)) == NULL))
+ *psz_source = '\0';
+ break;
+ }
+ }
}
-
- psz_parse = psz_eof + 1;
- }
- else
- {
- msg_Warn( p_obj, "unable to parse m field (2)");
- return VLC_EGENERIC;
}
- psz_eof = strchr( psz_parse, ' ' );
+ if (asprintf (&p_sdp->psz_uri, "%s://%s@%s:%i", vlc_proto, psz_source,
+ host, port) == -1)
+ return VLC_ENOMEM;
+ }
- if( psz_eof )
- {
- *psz_eof = '\0';
- psz_proto = strdup( psz_parse );
+ return VLC_SUCCESS;
+}
- psz_parse = psz_eof + 1;
- p_sdp->i_media_type = atoi( psz_parse );
- }
- else
- {
- msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
- p_sdp->i_media_type = 33;
- psz_proto = strdup( psz_parse );
- }
- }
+static int ParseSDPConnection (const char *str, struct sockaddr_storage *addr,
+ socklen_t *addrlen, unsigned *number)
+{
+ char host[60];
+ unsigned fam, n1, n2;
- if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
- {
- free( psz_proto );
- psz_proto = strdup( "rtp" );
- }
- if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
- {
- free( psz_proto );
- psz_proto = strdup( "udp" );
- }
+ int res = sscanf (str, "IN IP%u %59[^/]/%u/%u", &fam, host, &n1, &n2);
+ if (res < 2)
+ return -1;
- if( i_port == 0 )
+ switch (fam)
{
- i_port = 1234;
- }
+#ifdef AF_INET6
+ case 6:
+ addr->ss_family = AF_INET6;
+# ifdef HAVE_SA_LEN
+ addr->ss_len =
+# endif
+ *addrlen = sizeof (struct sockaddr_in6);
+
+ if (inet_pton (AF_INET6, host,
+ &((struct sockaddr_in6 *)addr)->sin6_addr) <= 0)
+ return -1;
+
+ *number = (res >= 3) ? n1 : 1;
+ break;
+#endif
- /* handle SSM case */
- psz_parse = GetAttribute( p_sdp, "source-filter" );
- char psz_source[258] = "";
- if (psz_parse != NULL)
- {
- char psz_source_ip[256];
+ case 4:
+ addr->ss_family = AF_INET;
+# ifdef HAVE_SA_LEN
+ addr->ss_len =
+# endif
+ *addrlen = sizeof (struct sockaddr_in);
- if (sscanf (psz_parse, " incl IN IP%*c %*s %255s ", psz_source_ip) == 1)
- {
- if (strchr (psz_source_ip, ':') != NULL)
- sprintf (psz_source, "[%s]", psz_source_ip);
- else
- strcpy (psz_source, psz_source_ip);
- }
- }
+ if (inet_pton (AF_INET, host,
+ &((struct sockaddr_in *)addr)->sin_addr) <= 0)
+ return -1;
- asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
- psz_uri, i_port );
+ *number = (res >= 4) ? n2 : 1;
+ break;
- FREENULL( psz_proto );
- return VLC_SUCCESS;
+ default:
+ return -1;
+ }
+ return 0;
}
+
/***********************************************************************
* ParseSDP : SDP parsing
* *********************************************************************
***********************************************************************/
static sdp_t *ParseSDP (vlc_object_t *p_obj, const char *psz_sdp)
{
- sdp_t *p_sdp;
- vlc_bool_t b_invalid = VLC_FALSE;
- vlc_bool_t b_end = VLC_FALSE;
if( psz_sdp == NULL )
- {
return NULL;
- }
- if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
- {
- msg_Warn( p_obj, "bad packet" );
- return NULL;
- }
-
- p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
- if( p_sdp == NULL )
+ sdp_t *p_sdp = calloc (1, sizeof (*p_sdp));
+ if (p_sdp == NULL)
return NULL;
- /* init to 0 */
- memset( p_sdp, 0, sizeof( sdp_t ) );
+ char expect = 'V';
+ struct sockaddr_storage glob_addr;
+ memset (&glob_addr, 0, sizeof (glob_addr));
+ socklen_t glob_len = 0;
+ unsigned glob_count = 1;
+ int port = 0;
- p_sdp->psz_sdp = strdup( psz_sdp );
- if( p_sdp->psz_sdp == NULL )
+ /* TODO: use iconv and charset attribute instead of EnsureUTF8 */
+ while (*psz_sdp)
{
- free( p_sdp );
- return NULL;
- }
-
- while( *psz_sdp != '\0' && b_end == VLC_FALSE )
- {
- char *psz_eol = NULL;
- char *psz_eof = NULL;
- char *psz_parse = NULL;
- char *psz_sess_id = NULL;
-
- while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
- *psz_sdp == ' ' || *psz_sdp == '\t' )
+ /* Extract one line */
+ char *eol = strchr (psz_sdp, '\n');
+ size_t linelen = eol ? (size_t)(eol - psz_sdp) : strlen (psz_sdp);
+ char line[linelen + 1];
+ memcpy (line, psz_sdp, linelen);
+ line[linelen] = '\0';
+
+ psz_sdp += linelen + 1;
+
+ /* Remove carriage return if present */
+ eol = strchr (line, '\r');
+ if (eol != NULL)
{
- psz_sdp++;
+ linelen = eol - line;
+ line[linelen] = '\0';
}
- if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
+ /* Validate line */
+ char cat = line[0], *data = line + 2;
+ if (!cat || (strchr ("vosiuepcbtrzkam", cat) == NULL))
{
- psz_eol = (char *)psz_sdp + strlen( psz_sdp );
- b_end = VLC_TRUE;
+ /* MUST ignore SDP with unknown line type */
+ msg_Dbg (p_obj, "unknown SDP line type: 0x%02x", (int)cat);
+ goto error;
}
- if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
+ if (line[1] != '=')
{
- psz_eol--;
+ msg_Dbg (p_obj, "invalid SDP line: %s", line);
+ goto error;
}
- if( psz_eol <= psz_sdp )
- {
- break;
- }
- *psz_eol++ = '\0';
+ assert (linelen >= 2);
- /* no space allowed between fields */
- if( psz_sdp[1] != '=' )
- {
- msg_Warn( p_obj, "invalid packet" ) ;
- FreeSDP( p_sdp ); p_sdp = NULL;
- return NULL;
- }
-
- /* Now parse each line */
- switch( psz_sdp[0] )
+ /* SDP parsing state machine
+ * We INTERNALLY use uppercase for session, lowercase for media
+ */
+ switch (expect)
{
- case( 'v' ):
- break;
- case( 's' ):
- p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
+ /* Session description */
+ case 'V':
+ expect = 'O';
+ if (cat != 'v')
+ {
+ msg_Dbg (p_obj, "missing SDP version");
+ goto error;
+ }
+ if (strcmp (data, "0"))
+ {
+ msg_Dbg (p_obj, "unknown SDP version: %s", data);
+ goto error;
+ }
break;
- case ( 'o' ):
+
+ case 'O':
{
- int i_field = 0;
- /* o field is <username> <session id> <version>
- * <network type> <address type> <address> */
-
-#define GET_FIELD( store ) \
- psz_eof = strchr( psz_parse, ' ' ); \
- if( psz_eof ) \
- { \
- *psz_eof=0; store = strdup( psz_parse ); \
- } \
- else \
- { \
- if( i_field != 5 ) \
- { \
- b_invalid = VLC_TRUE; break; \
- } \
- else \
- { \
- store = strdup( psz_parse ); \
- } \
- }; \
- psz_parse = psz_eof + 1; i_field++;
-
-
- psz_parse = (char *)&psz_sdp[2];
- GET_FIELD( p_sdp->psz_username );
- GET_FIELD( psz_sess_id );
-
- p_sdp->i_session_id = atoll( psz_sess_id );
-
- FREENULL( psz_sess_id );
-
- GET_FIELD( psz_sess_id );
- FREENULL( psz_sess_id );
-
- GET_FIELD( p_sdp->psz_network_type );
- GET_FIELD( p_sdp->psz_address_type );
- GET_FIELD( p_sdp->psz_address );
+ expect = 'S';
+ if (cat != 'o')
+ {
+ msg_Dbg (p_obj, "missing SDP originator");
+ goto error;
+ }
+ if ((sscanf (data, "%63s "I64Fu" "I64Fu" IN IP%u %1023s",
+ p_sdp->username, &p_sdp->session_id,
+ &p_sdp->session_version, &p_sdp->orig_ip_version,
+ p_sdp->orig_host) != 5)
+ || ((p_sdp->orig_ip_version != 4)
+ && (p_sdp->orig_ip_version != 6)))
+ {
+ msg_Dbg (p_obj, "SDP origin not supported: %s\n", data);
+ /* Or maybe out-of-range, but this looks suspicious */
+ return NULL;
+ }
+ EnsureUTF8 (p_sdp->orig_host);
break;
}
- case( 'i' ):
- case( 'u' ):
- case( 'e' ):
- case( 'p' ):
- case( 't' ):
- case( 'r' ):
- break;
- case( 'a' ): /* attribute */
- {
- char *psz_eon = strchr( &psz_sdp[2], ':' );
- attribute_t *p_attr = malloc( sizeof( attribute_t ) );
- /* Attribute with value */
- if( psz_eon )
+ case 'S':
+ {
+ expect = 'I';
+ if ((cat != 's') || !*data)
{
- *psz_eon++ = '\0';
+ /* MUST be present AND non-empty */
+ msg_Dbg (p_obj, "missing SDP session name");
+ goto error;
+ }
+ assert (p_sdp->psz_sessionname == NULL); // no memleak here
+ p_sdp->psz_sessionname = strdup (data);
+ EnsureUTF8 (p_sdp->psz_sessionname);
+ if (p_sdp->psz_sessionname == NULL)
+ goto error;
+ break;
+ }
- p_attr->psz_field = strdup( &psz_sdp[2] );
- p_attr->psz_value = strdup( psz_eon );
+ case 'I':
+ expect = 'U';
+ if (cat == 'i')
+ break;
+ case 'U':
+ expect = 'E';
+ if (cat == 'u')
+ break;
+ case 'E':
+ expect = 'E';
+ if (cat == 'e')
+ break;
+ case 'P':
+ expect = 'P';
+ if (cat == 'p')
+ break;
+ case 'C':
+ expect = 'B';
+ if (cat == 'c')
+ {
+ if (ParseSDPConnection (data, &glob_addr, &glob_len,
+ &glob_count))
+ {
+ msg_Dbg (p_obj, "SDP connection infos not supported: "
+ "%s", data);
+ goto error;
+ }
+ break;
}
- else /* Attribute without value */
+ case 'B':
+ assert (expect == 'B');
+ if (cat == 'b')
+ break;
+ case 'T':
+ expect = 'R';
+ if (cat != 't')
{
- p_attr->psz_field = strdup( &psz_sdp[2] );
- p_attr->psz_value = NULL;
+ msg_Dbg (p_obj, "missing SDP time description");
+ goto error;
}
-
- TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
break;
- }
- case( 'm' ): /* Media announcement */
+ case 'R':
+ if ((cat == 't') || (cat == 'r'))
+ break;
+
+ case 'Z':
+ expect = 'K';
+ if (cat == 'z')
+ break;
+ case 'K':
+ expect = 'A';
+ if (cat == 'k')
+ break;
+ case 'A':
+ //expect = 'A';
+ if (cat == 'a')
+ {
+ attribute_t *p_attr = MakeAttribute (data);
+ TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
+ break;
+ }
+
+ /* Media description */
+ case 'm':
+ media:
{
- /* If we have several medias, we pass the announcement to
- * LIVE.COM, so just count them */
- p_sdp->i_media++;
- if( p_sdp->i_media == 1 )
+ expect = 'i';
+ if (cat != 'm')
+ {
+ msg_Dbg (p_obj, "missing SDP media description");
+ goto error;
+ }
+ struct sdp_media_t *m;
+ m = realloc (p_sdp->mediav, (p_sdp->mediac + 1) * sizeof (*m));
+ if (m == NULL)
+ goto error;
+
+ p_sdp->mediav = m;
+ m += p_sdp->mediac;
+ p_sdp->mediac++;
+
+ memset (m, 0, sizeof (*m));
+ memcpy (&m->addr, &glob_addr, m->addrlen = glob_len);
+ m->n_addr = glob_count;
+
+ /* TODO: remember media type (if we need multiple medias) */
+ data = strchr (data, ' ');
+ if (data == NULL)
+ {
+ msg_Dbg (p_obj, "missing SDP media port");
+ goto error;
+ }
+ port = atoi (++data);
+ if (port <= 0 || port >= 65536)
+ {
+ msg_Dbg (p_obj, "invalid transport port %d", port);
+ goto error;
+ }
+ net_SetPort ((struct sockaddr *)&m->addr, htons (port));
+
+ data = strchr (data, ' ');
+ if (data == NULL)
{
- p_sdp->psz_media = strdup( &psz_sdp[2] );
+ msg_Dbg (p_obj, "missing SDP media format");
+ goto error;
}
+ m->fmt = strdup (++data);
+ if (m->fmt == NULL)
+ goto error;
+
break;
}
+ case 'i':
+ expect = 'c';
+ if (cat == 'i')
+ break;
+ case 'c':
+ expect = 'b';
+ if (cat == 'c')
+ {
+ struct sdp_media_t *m = p_sdp->mediav + p_sdp->mediac - 1;
+ if (ParseSDPConnection (data, &m->addr, &m->addrlen,
+ &m->n_addr))
+ {
+ msg_Dbg (p_obj, "SDP connection infos not supported: "
+ "%s", data);
+ goto error;
+ }
+ net_SetPort ((struct sockaddr *)&m->addr, htons (port));
+ break;
+ }
+ case 'b':
+ expect = 'b';
+ if (cat == 'b')
+ break;
+ case 'k':
+ expect = 'a';
+ if (cat == 'k')
+ break;
+ case 'a':
+ assert (expect == 'a');
+ if (cat == 'a')
+ {
+ attribute_t *p_attr = MakeAttribute (data);
+ if (p_attr == NULL)
+ goto error;
- case( 'c' ):
- {
- if( p_sdp->psz_connection != NULL ) // FIXME
+ TAB_APPEND (p_sdp->mediav[p_sdp->mediac - 1].i_attributes,
+ p_sdp->mediav[p_sdp->mediac - 1].pp_attributes, p_attr);
break;
+ }
- p_sdp->psz_connection = strdup( &psz_sdp[2] );
+ if (cat == 'm')
+ goto media;
+
+ if (cat != 'm')
+ {
+ msg_Dbg (p_obj, "unexpected SDP line: 0x%02x", (int)cat);
+ goto error;
+ }
break;
- }
default:
- break;
- }
-
- if( b_invalid )
- {
- FreeSDP( p_sdp ); p_sdp = NULL;
- return NULL;
+ msg_Err (p_obj, "*** BUG in SDP parser! ***");
+ goto error;
}
-
- psz_sdp = psz_eol;
}
return p_sdp;
+
+error:
+ FreeSDP (p_sdp);
+ return NULL;
}
static int InitSocket( services_discovery_t *p_sd, const char *psz_address,
if (i_fd == -1)
return VLC_EGENERIC;
- net_StopSend( i_fd );
+ shutdown( i_fd, SHUT_WR );
INSERT_ELEM (p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
p_sd->p_sys->i_fd, i_fd);
return VLC_SUCCESS;
static void FreeSDP( sdp_t *p_sdp )
{
- int i;
- FREENULL( p_sdp->psz_sdp );
- FREENULL( p_sdp->psz_sessionname );
- FREENULL( p_sdp->psz_connection );
- FREENULL( p_sdp->psz_media );
- FREENULL( p_sdp->psz_uri );
- FREENULL( p_sdp->psz_username );
- FREENULL( p_sdp->psz_network_type );
-
- FREENULL( p_sdp->psz_address );
- FREENULL( p_sdp->psz_address_type );
-
- for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
+ free( p_sdp->psz_sessionname );
+ free( p_sdp->psz_uri );
+
+ for (unsigned j = 0; j < p_sdp->mediac; j++)
{
- struct attribute_t *p_attr = p_sdp->pp_attributes[i];
- FREENULL( p_sdp->pp_attributes[i]->psz_field );
- FREENULL( p_sdp->pp_attributes[i]->psz_value );
- REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
- FREENULL( p_attr );
+ free (p_sdp->mediav[j].fmt);
+ for (int i = 0; i < p_sdp->mediav[j].i_attributes; i++)
+ FreeAttribute (p_sdp->mediav[j].pp_attributes[i]);
+ free (p_sdp->mediav[j].pp_attributes);
}
- FREENULL( p_sdp );
+ free (p_sdp->mediav);
+
+ for (int i = 0; i < p_sdp->i_attributes; i++)
+ FreeAttribute (p_sdp->pp_attributes[i]);
+
+ free (p_sdp->pp_attributes);
+ free (p_sdp);
}
static int RemoveAnnounce( services_discovery_t *p_sd,
static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
{
/* A session is identified by
- * username, session_id, network type, address type and address */
- if( p_sdp1->psz_username && p_sdp2->psz_username &&
- p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
- p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
- p_sdp1->psz_address && p_sdp2->psz_address )
+ * - username,
+ * - session_id,
+ * - network type (which is always IN),
+ * - address type (currently, this means IP version),
+ * - and hostname.
+ */
+ if (strcmp (p_sdp1->username, p_sdp2->username)
+ || (p_sdp1->session_id != p_sdp2->session_id)
+ || (p_sdp1->orig_ip_version != p_sdp2->orig_ip_version)
+ || strcmp (p_sdp1->orig_host, p_sdp2->orig_host))
+ return VLC_FALSE;
+
+ return VLC_TRUE;
+}
+
+
+static inline attribute_t *MakeAttribute (const char *str)
+{
+ attribute_t *a = malloc (sizeof (*a) + strlen (str) + 1);
+ if (a == NULL)
+ return NULL;
+
+ strcpy (a->name, str);
+ EnsureUTF8 (a->name);
+ char *value = strchr (a->name, ':');
+ if (value != NULL)
{
- if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
- !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
- !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
- !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
- p_sdp1->i_session_id == p_sdp2->i_session_id )
- {
- return VLC_TRUE;
- }
- else
- {
- return VLC_FALSE;
- }
+ *value++ = '\0';
+ a->value = value;
}
else
- {
- return VLC_FALSE;
- }
+ a->value = "";
+ return a;
+}
+
+
+static const char *GetAttribute (attribute_t **tab, unsigned n,
+ const char *name)
+{
+ for (unsigned i = 0; i < n; i++)
+ if (strcasecmp (tab[i]->name, name) == 0)
+ return tab[i]->value;
+ return NULL;
+}
+
+
+static inline void FreeAttribute (attribute_t *a)
+{
+ free (a);
}
projects / vlc / blobdiff