1 /*****************************************************************************
2 * sdp.c : SDP creation helpers
3 *****************************************************************************
4 * Copyright © 2007 Rémi Denis-Courmont
7 * Authors: Rémi Denis-Courmont
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
27 #include <vlc_network.h>
28 #include <vlc_charset.h>
30 #include "stream_output.h"
32 #define MAXSDPADDRESS 47
35 char *AddressToSDP (const struct sockaddr *addr, socklen_t addrlen, char *buf)
37 if (addrlen < offsetof (struct sockaddr, sa_family)
38 + sizeof (addr->sa_family))
41 strcpy (buf, "IN IP* ");
43 if (vlc_getnameinfo (addr, addrlen, buf + 7, MAXSDPADDRESS - 7, NULL,
47 switch (addr->sa_family)
51 if (net_SockAddrIsMulticast (addr, addrlen))
52 strcat (buf, "/255"); // obsolete in RFC4566, dummy value
60 char *ptr = strchr (buf, '%');
62 *ptr = '\0'; // remove scope ID
76 static vlc_bool_t IsSDPString (const char *str)
78 if (strchr (str, '\r') != NULL)
80 if (strchr (str, '\n') != NULL)
88 char *StartSDP (const char *name, const char *description, const char *url,
89 const char *email, const char *phone, vlc_bool_t ssm,
90 const struct sockaddr *orig, socklen_t origlen,
91 const struct sockaddr *addr, socklen_t addrlen)
93 uint64_t t = NTPtime64 ();
94 char *sdp, machine[MAXSDPADDRESS], conn[MAXSDPADDRESS],
95 sfilter[MAXSDPADDRESS + sizeof ("\r\na=source-filter: incl * ")];
96 const char *preurl = "\r\nu=", *premail = "\r\ne=", *prephone = "\r\np=";
100 if (description == NULL)
105 premail = email = "";
107 prephone = phone = "";
109 if (!IsSDPString (name) || !IsSDPString (description)
110 || !IsSDPString (url) || !IsSDPString (email) || !IsSDPString (phone)
111 || (AddressToSDP ((struct sockaddr *)orig, origlen, machine) == NULL)
112 || (AddressToSDP ((struct sockaddr *)addr, addrlen, conn) == NULL))
116 sprintf (sfilter, "\r\na=source-filter: incl IN IP%c * %s",
117 machine[5], machine + 7);
121 if (asprintf (&sdp, "v=0"
122 "\r\no=- "I64Fu" "I64Fu" %s"
125 "%s%s" // optional URL
126 "%s%s" // optional email
127 "%s%s" // optional phone number
129 // bandwidth not specified
130 "\r\nt=0 0" // one dummy time span
132 // no time zone adjustment (silly idea anyway)
133 // no encryption key (deprecated)
134 "\r\na=tool:"PACKAGE_STRING
136 "\r\na=type:broadcast"
137 "\r\na=charset:UTF-8"
138 "%s" // optional source filter
140 /* o= */ t, t, machine,
142 /* i= */ description,
143 /* u= */ preurl, url,
144 /* e= */ premail, email,
145 /* p= */ prephone, phone,
147 /* source-filter */ sfilter) == -1)