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() */
28 #include <stdio.h> /* sprintf() */
29 #include <string.h> /* strerror() */
39 #define SAP_ADDR "224.2.127.254" /* Standard port and address for SAP */
42 /*****************************************************************************
43 * sout_SAPNew: Creates a SAP Session
44 *****************************************************************************/
45 sap_session_t * sout_SAPNew ( sout_instance_t *p_sout , char * psz_url_arg , char *psz_port_arg , char * psz_name_arg )
49 network_socket_t socket_desc;
51 struct sockaddr_in addr;
54 p_new = (sap_session_t *)malloc( sizeof ( sap_session_t ) ) ;
56 sprintf ( p_new->psz_url , "%s" , psz_url_arg );
57 sprintf ( p_new->psz_name , "%s" , psz_name_arg );
58 sprintf ( p_new->psz_port, "%s" , psz_port_arg ); /* Not implemented in SO */
60 msg_Dbg (p_sout , "Creating SAP Socket" );
62 socket_desc.i_type = NETWORK_UDP;
63 socket_desc.psz_bind_addr = SAP_ADDR;
64 socket_desc.i_bind_port = SAP_PORT;
65 socket_desc.psz_server_addr = "";
66 socket_desc.i_server_port = 0;
67 socket_desc.i_handle = 0;
69 sprintf ( psz_network,"ipv4" );
71 p_sout->p_private=(void*) &socket_desc;
73 if( !( p_network = module_Need( p_sout, "network", psz_network ) ) )
75 msg_Warn( p_sout, "failed to open a connection (udp)" );
78 module_Unneed( p_sout, p_network );
80 p_new->socket = socket_desc.i_handle;
82 memset( &addr , 0 , sizeof(addr) );
83 addr.sin_family = AF_INET;
84 addr.sin_addr.s_addr = inet_addr(SAP_ADDR);
85 addr.sin_port = htons( SAP_PORT );
87 setsockopt( p_new->socket, IPPROTO_IP, IP_MULTICAST_TTL,
88 (void*)&ttl, sizeof(ttl) );
95 /*****************************************************************************
96 * sout_SAPDelete: Deletes a SAP Session
97 *****************************************************************************/
98 void sout_SAPDelete( sap_session_t * p_this )
100 shutdown(p_this->socket,0);
104 /*****************************************************************************
105 * sout_SAPSend: Sends a SAP packet
106 *****************************************************************************/
107 void sout_SAPSend( sout_instance_t *p_sout, sap_session_t * p_this )
112 char *payload_type="application/sdp";
119 if( p_this->sendnow == 1 )
121 i_header_size = 9 + strlen( payload_type );
122 sap_head = ( char * )malloc( i_header_size * sizeof( char ) );
124 sap_head[0]=0x20; /* Means IPv4, not encrypted, not compressed */
125 sap_head[1]=0x00; /* No authentification */
126 sap_head[2]=0x42; /* Version */
127 sap_head[3]=0x12; /* Version */
129 sap_head[4]=0x01; /* Source IP FIXME: we should get the real address */
130 sap_head[5]=0x02; /* idem */
131 sap_head[6]=0x03; /* idem */
132 sap_head[7]=0x04; /* idem */
134 strncpy( sap_head+8 , payload_type , 15 );
135 sap_head[ i_header_size-1 ] = '\0';
137 /* Do not add spaces at beginning of the lines ! */
138 sprintf(sap_msg,"v=0\n\
139 o=VideoLAN 3247692199 3247895918 IN IP4 VideoLAN\n\
145 a=type:test\n", p_this->psz_name , p_this->psz_port , p_this->psz_url );
147 i_msg_size = strlen( sap_msg );
148 i_size = i_msg_size + i_header_size;
150 sap_send = ( char* )malloc( i_size*sizeof(char) );
152 for(i=0 ; i<i_header_size ; i++)
154 sap_send[i] = sap_head[i];
157 for( ; i<i_size; i++)
159 sap_send[i] = sap_msg[i-i_header_size];
162 /* What we send is the SAP header and the SDP packet */
164 if(i_size<1024) /* We mustn't send packets larger than 1024B */
165 i_send_result = sendto( p_this->socket , sap_send , i_size , 0 , (struct sockaddr *)&p_this->addr , sizeof(p_this->addr) );
167 if(i_send_result == -1)
169 msg_Warn(p_sout , "SAP Send failed on socket %i. " , p_this->socket );
173 if(sap_send) free(sap_send);
174 if(sap_head) free(sap_head);