1 /*****************************************************************************
2 * announce.c : Session announcement
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
6 * Authors: Clément Stenac <zorglub@via.ecp.fr>
7 * Damien Lucas <nitrox@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* free() */
29 #include <errno.h> /* ENOMEM */
30 #include <stdio.h> /* sprintf() */
40 # include <winsock2.h>
41 # include <ws2tcpip.h>
43 # define IN_MULTICAST(a) IN_CLASSD(a)
46 # include <sys/socket.h>
56 #define SAP_IPV4_ADDR "224.2.127.254" /* Standard port and address for SAP */
59 #define SAP_IPV6_ADDR_1 "FF0"
60 #define SAP_IPV6_ADDR_2 "::2:7FFE"
62 #define DEFAULT_PORT "1234"
64 /****************************************************************************
65 * Split : split a string into two parts: the one which is before the delim
66 * and the one which is after.
67 * NULL is returned if delim is not found
68 ****************************************************************************/
69 static char * split( char *psz_in, char *psz_out1, char *psz_out2, char delim)
71 unsigned int i_count = 0; /* pos in input string */
72 unsigned int i_pos1 = 0; /* pos in out2 string */
73 unsigned int i_pos2 = 0;
74 char *psz_cur; /* store the pos of the first delim found */
76 /* Skip spaces at the beginning */
77 while( psz_in[i_count] == ' ' )
82 if( psz_in[i_count] == '\0' )
88 while( psz_in[i_count] && psz_in[i_count] != delim )
90 psz_out1[i_pos1] = psz_in[i_count];
94 /* Mark the end of out1 */
95 psz_out1[i_pos1] = '\0';
97 if( psz_in[i_count] == '\0' )
102 /* store pos of the first delim */
103 psz_cur = psz_in + i_count;
105 /* skip all delim and all spaces */
106 while( psz_in[i_count] == ' ' || psz_in[i_count] == delim )
111 if( psz_in[i_count] == '\0' )
116 /* Store the second string */
117 while( psz_in[i_count] )
119 psz_out2[i_pos2] = psz_in[i_count];
123 psz_out2[i_pos2] = '\0';
128 /*****************************************************************************
129 * sout_SAPNew: Creates a SAP Session
130 *****************************************************************************/
131 sap_session_t * sout_SAPNew ( sout_instance_t *p_sout,
135 char * psz_v6_scope )
137 sap_session_t *p_sap; /* The SAP structure */
138 module_t *p_network; /* Network module */
139 network_socket_t socket_desc; /* Socket descriptor */
140 char *sap_ipv6_addr = NULL; /* IPv6 built address */
141 char *psz_eol; /* Used to parse IPv6 URIs */
142 int i_port; /* Port in numerical format */
144 /* Allocate the SAP structure */
145 p_sap = (sap_session_t *) malloc( sizeof ( sap_session_t ) ) ;
148 msg_Err( p_sout, "out of memory" );
152 /* Fill the information in the structure */
153 if( strstr( psz_url_arg, "[" ) )
155 /* We have an IPv6 address. Do not use ':' as the port separator */
156 psz_eol = strchr( psz_url_arg, ']' );
159 msg_Warn( p_sout, "no matching ], unable to parse URI");
165 sprintf( p_sap->psz_url, "%s", psz_url_arg );
166 sprintf( p_sap->psz_port, "%s", DEFAULT_PORT );
171 sprintf( p_sap->psz_url, "%s", psz_url_arg );
175 sprintf( p_sap->psz_port, "%s", psz_eol );
181 split( psz_url_arg, p_sap->psz_url, p_sap->psz_port, ':' );
184 /* Check if we have a port */
185 if( !strlen( p_sap->psz_port ) )
187 sprintf( p_sap->psz_port, "%s", DEFAULT_PORT );
190 /* Make sure our port is valid and atoi it */
191 i_port = atoi( p_sap->psz_port );
195 sprintf( p_sap->psz_port, "%s", DEFAULT_PORT );
199 sprintf( p_sap->psz_port, "%i", i_port );
202 /* The name that we send */
203 sprintf( p_sap->psz_name, "%s", psz_name_arg );
205 p_sap->i_ip_version = ip_version;
207 /* Only "6" triggers IPv6. IPv4 is default */
208 if( ip_version != 6 )
210 msg_Dbg( p_sout, "creating IPv4 SAP socket" );
212 /* Fill the socket descriptor */
213 socket_desc.i_type = NETWORK_UDP;
214 socket_desc.psz_bind_addr = "";
215 socket_desc.i_bind_port = 0;
216 socket_desc.psz_server_addr = SAP_IPV4_ADDR;
217 socket_desc.i_server_port = SAP_PORT;
218 socket_desc.i_handle = 0;
219 socket_desc.i_ttl = 0;
221 /* Call the network module */
222 p_sout->p_private = (void*) &socket_desc;
223 if( !( p_network = module_Need( p_sout, "network", "ipv4" ) ) )
225 msg_Warn( p_sout, "failed to open a connection (udp)" );
228 module_Unneed( p_sout, p_network );
230 p_sap->i_socket = socket_desc.i_handle;
231 if( p_sap->i_socket < 0 )
233 msg_Warn( p_sout, "unable to initialize SAP" );
239 msg_Dbg( p_sout, "creating IPv6 SAP socket with scope %s",
242 /* Initialize and build the IPv6 address to broadcast to */
243 sap_ipv6_addr = (char *) malloc( 28 * sizeof(char) );
244 if ( !sap_ipv6_addr )
246 msg_Err( p_sout, "out of memory" );
249 sprintf( sap_ipv6_addr, "%s%c%s",
250 SAP_IPV6_ADDR_1, psz_v6_scope[0], SAP_IPV6_ADDR_2 );
252 /* Fill the socket descriptor */
253 socket_desc.i_type = NETWORK_UDP;
254 socket_desc.psz_bind_addr = "";
255 socket_desc.i_bind_port = 0;
256 socket_desc.psz_server_addr = sap_ipv6_addr;
257 socket_desc.i_server_port = SAP_PORT;
258 socket_desc.i_handle = 0;
259 socket_desc.i_ttl = 0;
261 /* Call the network module */
262 p_sout->p_private = (void *) &socket_desc;
263 if( !( p_network = module_Need( p_sout, "network", "ipv6" ) ) )
265 msg_Warn( p_sout, "failed to open a connection (udp)" );
268 module_Unneed( p_sout, p_network );
270 p_sap->i_socket = socket_desc.i_handle;
271 if( p_sap->i_socket <= 0 )
273 msg_Warn( p_sout, "unable to initialize SAP" );
277 /* Free what we allocated */
280 free( sap_ipv6_addr );
284 msg_Dbg( p_sout, "SAP initialization complete" );
289 /*****************************************************************************
290 * sout_SAPDelete: Deletes a SAP Session
291 *****************************************************************************/
292 void sout_SAPDelete( sout_instance_t *p_sout, sap_session_t * p_sap )
296 #if defined( UNDER_CE )
297 i_ret = CloseHandle( (HANDLE)p_sap->i_socket );
298 #elif defined( WIN32 )
299 i_ret = closesocket( p_sap->i_socket );
301 i_ret = close( p_sap->i_socket );
306 msg_Err( p_sout, "unable to close SAP socket" );
312 /*****************************************************************************
313 * sout_SAPSend: Sends a SAP packet
314 *****************************************************************************/
315 void sout_SAPSend( sout_instance_t *p_sout, sap_session_t * p_sap )
317 char psz_msg[1000]; /* SDP content */
318 char *psz_head; /* SAP header */
319 char *psz_send; /* What we send */
320 char *psz_type = "application/sdp";
321 int i_header_size; /* SAP header size */
322 int i_msg_size; /* SDP content size */
323 int i_size; /* Total size */
326 /* We send a packet every 24 calls to the function */
327 if( p_sap->i_calls++ < 24 )
332 i_header_size = 8 + strlen( psz_type ) + 1;
333 psz_head = (char *) malloc( i_header_size * sizeof( char ) );
337 msg_Err( p_sout, "out of memory" );
341 /* Create the SAP headers */
342 psz_head[0] = 0x20; /* Means IPv4, not encrypted, not compressed */
343 psz_head[1] = 0x00; /* No authentification */
344 psz_head[2] = 0x42; /* Version */
345 psz_head[3] = 0x12; /* Version */
347 psz_head[4] = 0x01; /* Source IP FIXME: we should get the real address */
348 psz_head[5] = 0x02; /* idem */
349 psz_head[6] = 0x03; /* idem */
350 psz_head[7] = 0x04; /* idem */
352 strncpy( psz_head + 8, psz_type, 15 );
353 psz_head[ i_header_size-1 ] = '\0';
355 /* Create the SDP content */
356 /* Do not add spaces at beginning of the lines ! */
357 sprintf( psz_msg, "v=0\n"
358 "o=VideoLAN 3247692199 3247895918 IN IP4 VideoLAN\n"
362 "m=video %s udp 33\n"
365 p_sap->psz_name, p_sap->psz_port, p_sap->psz_url );
367 i_msg_size = strlen( psz_msg );
368 i_size = i_msg_size + i_header_size;
370 /* Create the message */
371 psz_send = (char *) malloc( i_size*sizeof(char) );
374 msg_Err( p_sout, "out of memory" );
378 memcpy( psz_send, psz_head, i_header_size );
379 memcpy( psz_send + i_header_size, psz_msg, i_msg_size );
381 if( i_size < 1024 ) /* We mustn't send packets larger than 1024B */
383 i_ret = send( p_sap->i_socket, psz_send, i_size, 0 );
388 msg_Warn( p_sout, "SAP send failed on socket %i (%s)",
389 p_sap->i_socket, strerror(errno) );
394 /* Free what we allocated */
400 /*****************************************************************************
401 * sout_SLPBuildName: Builds a service name according to SLP standard
402 *****************************************************************************/
403 static char * sout_SLPBuildName(char *psz_url,char *psz_name)
408 /* name to build is: service:vlc.services.videolan://$(url) */
410 i_size = 8 + 12 + 12 + 5 + strlen(psz_url) + 1;
412 psz_service=(char *)malloc(i_size * sizeof(char));
414 snprintf( psz_service , i_size,
415 "service:vlc.services.videolan://udp:@%s",
419 psz_service[i_size]='\0'; /* Just to make sure */
425 /*****************************************************************************
426 * sout_SLPReport: Reporting function. Unused at the moment but needed
427 *****************************************************************************/
428 static void sout_SLPReport(SLPHandle slp_handle,SLPError slp_error,void* cookie)
433 /*****************************************************************************
434 * sout_SLPReg: Registers the program with SLP
435 *****************************************************************************/
436 int sout_SLPReg( sout_instance_t *p_sout, char * psz_url,
440 SLPHandle slp_handle;
442 char *psz_service= sout_SLPBuildName(psz_url,psz_name);
444 if( SLPOpen( NULL, SLP_FALSE, &slp_handle ) != SLP_OK)
446 msg_Warn(p_sout,"Unable to initialize SLP");
450 msg_Info(p_sout , "Registering %s (name: %s) in SLP",
451 psz_service , psz_name);
453 slp_res = SLPReg ( slp_handle,
455 SLP_LIFETIME_MAXIMUM,
462 if( slp_res != SLP_OK )
464 msg_Warn(p_sout,"Error while registering service: %i", slp_res );
470 #else /* This function should never be called if this is false */
476 /*****************************************************************************
477 * sout_SLDePReg: Unregisters the program from SLP
478 *****************************************************************************/
479 int sout_SLPDereg( sout_instance_t *p_sout, char * psz_url,
484 SLPHandle slp_handle;
486 char *psz_service= sout_SLPBuildName(psz_url,psz_name);
488 if( SLPOpen( NULL, SLP_FALSE, &slp_handle ) != SLP_OK)
490 msg_Warn(p_sout,"Unable to initialize SLP");
494 msg_Info(p_sout , "Unregistering %s from SLP",
497 slp_res = SLPDereg ( slp_handle,
502 if( slp_res != SLP_OK )
504 msg_Warn(p_sout,"Error while registering service: %i", slp_res );
510 #else /* This function should never be called if this is false */