--- /dev/null
+/*****************************************************************************
+ * sdp.c : SDP creation helpers
+ *****************************************************************************
+ * Copyright © 2007 Rémi Denis-Courmont
+ * $Id$
+ *
+ * Authors: 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+# include <vlc/vlc.h>
+
+# include <string.h>
+# include <vlc_network.h>
+# include <vlc_charset.h>
+
+# define MAXSDPADDRESS 47
+
+static
+char *AddressToSDP (const struct sockaddr *addr, socklen_t addrlen, char *buf)
+{
+ const char *ttl = NULL;
+ strcpy (buf, "IN IP* ");
+
+ switch (addr->sa_family)
+ {
+ case AF_INET:
+ {
+ if (net_SockAddrIsMulticast (addr, addrlen))
+ ttl = "/255"; // obsolete in RFC4566, dummy value
+ buf[5] = '4';
+ break;
+ }
+
+#ifdef AF_INET6
+ case AF_INET6:
+ buf[5] = '6';
+ break;
+#endif
+
+ default:
+ return NULL;
+ }
+
+ if (vlc_getnameinfo (addr, addrlen, buf + 4, MAXSDPADDRESS - 4, NULL,
+ NI_NUMERICHOST))
+ return NULL;
+
+ if (ttl != NULL)
+ strcat (buf, ttl);
+
+ return buf;
+}
+
+
+char *StartSDP (const char *name,
+ const struct sockaddr *orig, socklen_t origlen,
+ const struct sockaddr *addr, socklen_t addrlen)
+{
+ uint64_t t = NTPtime64 ();
+ char *sdp, machine[MAXSDPADDRESS], conn[MAXSDPADDRESS];
+
+ if (strchr (name, '\r') || strchr (name, '\n') || !IsUTF8 (name)
+ || (AddressToSDP ((struct sockaddr *)&orig, origlen, machine) == NULL)
+ || (AddressToSDP ((struct sockaddr *)&addr, addrlen, conn) == NULL))
+ return NULL;
+
+ if (asprintf (&sdp, "v=0\r\n"
+ "o=- "I64Fu" "I64Fu" %s\r\n"
+ "s=%s\r\n"
+ "i=N/A\r\n" // must be there even if useless
+ // no URL, email and phone here */
+ "c=%s\r\n"
+ // bandwidth not specified
+ "t= 0 0" // one dummy time span
+ // no repeating
+ // no time zone adjustment (silly idea anyway)
+ // no encryption key (deprecated)
+ "a=tool:"PACKAGE_STRING"\r\n"
+ "a=recvonly\r\n"
+ "a=type:broadcast\r\n"
+ "a=charset:UTF-8\r\n",
+ /* o= */ t, t, machine,
+ /* s= */ name,
+ /* c= */ conn) == -1)
+ return NULL;
+ return sdp;
+}
+