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 const char *ttl = NULL;
42 strcpy (buf, "IN IP* ");
44 switch (addr->sa_family)
48 if (net_SockAddrIsMulticast (addr, addrlen))
49 ttl = "/255"; // obsolete in RFC4566, dummy value
64 if (vlc_getnameinfo (addr, addrlen, buf + 7, MAXSDPADDRESS - 7, NULL,
75 static vlc_bool_t IsSDPString (const char *str)
77 if (strchr (str, '\r') != NULL)
79 if (strchr (str, '\n') != NULL)
87 char *StartSDP (const char *name, const char *description, const char *url,
88 const char *email, const char *phone, vlc_bool_t ssm,
89 const struct sockaddr *orig, socklen_t origlen,
90 const struct sockaddr *addr, socklen_t addrlen)
92 uint64_t t = NTPtime64 ();
93 char *sdp, machine[MAXSDPADDRESS], conn[MAXSDPADDRESS],
94 sfilter[MAXSDPADDRESS + sizeof ("\r\na=source-filter: incl * ")];
95 const char *preurl = "\r\nu=", *premail = "\r\ne=", *prephone = "\r\np=";
99 if (description == NULL)
104 premail = email = "";
106 prephone = phone = "";
108 if (!IsSDPString (name) || !IsSDPString (description)
109 || !IsSDPString (url) || !IsSDPString (email) || !IsSDPString (phone)
110 || (AddressToSDP ((struct sockaddr *)orig, origlen, machine) == NULL)
111 || (AddressToSDP ((struct sockaddr *)addr, addrlen, conn) == NULL))
115 sprintf (sfilter, "\r\na=source-filter: incl IN IP%c * %s",
116 machine[5], machine + 7);
120 if (asprintf (&sdp, "v=0"
121 "\r\no=- "I64Fu" "I64Fu" %s"
124 "%s%s" // optional URL
125 "%s%s" // optional email
126 "%s%s" // optional phone number
128 // bandwidth not specified
129 "\r\nt=0 0" // one dummy time span
131 // no time zone adjustment (silly idea anyway)
132 // no encryption key (deprecated)
133 "\r\na=tool:"PACKAGE_STRING
135 "\r\na=type:broadcast"
136 "\r\na=charset:UTF-8"
137 "%s" // optional source filter
139 /* o= */ t, t, machine,
141 /* i= */ description,
142 /* u= */ preurl, url,
143 /* e= */ premail, email,
144 /* p= */ prephone, phone,
146 /* source-filter */ sfilter) == -1)