* 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
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 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.
+ * GNU Lesser 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 <vlc/vlc.h>
-# include <string.h>
-# include <vlc_network.h>
-# include <vlc_charset.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <assert.h>
+#include <vlc_network.h>
+#include <vlc_charset.h>
-# include "stream_output.h"
+#include "stream_output.h"
-# define MAXSDPADDRESS 47
+#define MAXSDPADDRESS 47
static
char *AddressToSDP (const struct sockaddr *addr, socklen_t addrlen, char *buf)
{
- const char *ttl = NULL;
+ if (addrlen < offsetof (struct sockaddr, sa_family)
+ + sizeof (addr->sa_family))
+ return NULL;
+
strcpy (buf, "IN IP* ");
+ if (vlc_getnameinfo (addr, addrlen, buf + 7, MAXSDPADDRESS - 7, NULL,
+ NI_NUMERICHOST))
+ return NULL;
+
switch (addr->sa_family)
{
case AF_INET:
{
if (net_SockAddrIsMulticast (addr, addrlen))
- ttl = "/255"; // obsolete in RFC4566, dummy value
+ strcat (buf, "/255"); // obsolete in RFC4566, dummy value
buf[5] = '4';
break;
}
#ifdef AF_INET6
case AF_INET6:
+ {
+ char *ptr = strchr (buf, '%');
+ if (ptr != NULL)
+ *ptr = '\0'; // remove scope ID
buf[5] = '6';
break;
+ }
#endif
default:
return NULL;
}
- if (vlc_getnameinfo (addr, addrlen, buf + 4, MAXSDPADDRESS - 4, NULL,
- NI_NUMERICHOST))
- return NULL;
+ return buf;
+}
- if (ttl != NULL)
- strcat (buf, ttl);
- return buf;
+static vlc_bool_t IsSDPString (const char *str)
+{
+ if (strchr (str, '\r') != NULL)
+ return VLC_FALSE;
+ if (strchr (str, '\n') != NULL)
+ return VLC_FALSE;
+ if (!IsUTF8 (str))
+ return VLC_FALSE;
+ return VLC_TRUE;
}
-char *StartSDP (const char *name,
- const struct sockaddr *orig, socklen_t origlen,
+char *sdp_Start (const char *name, const char *description, const char *url,
+ const char *email, const char *phone,
+ const struct sockaddr *src, socklen_t srclen,
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))
+ uint64_t now = NTPtime64 ();
+ char *sdp;
+ char connection[MAXSDPADDRESS], hostname[256],
+ sfilter[MAXSDPADDRESS + sizeof ("\r\na=source-filter: incl * ")];
+ const char *preurl = "\r\nu=", *premail = "\r\ne=", *prephone = "\r\np=";
+
+ gethostname (hostname, sizeof (hostname));
+
+ if (name == NULL)
+ name = "Unnamed";
+ if (description == NULL)
+ description = "N/A";
+ if (url == NULL)
+ preurl = url = "";
+ if (email == NULL)
+ premail = email = "";
+ if (phone == NULL)
+ prephone = phone = "";
+
+ if (!IsSDPString (name) || !IsSDPString (description)
+ || !IsSDPString (url) || !IsSDPString (email) || !IsSDPString (phone)
+ || (AddressToSDP (addr, addrlen, connection) == 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"
+ strcpy (sfilter, "");
+ if (srclen > 0)
+ {
+ char machine[MAXSDPADDRESS];
+
+ if (AddressToSDP (src, srclen, machine) != NULL)
+ sprintf (sfilter, "\r\na=source-filter: incl IN IP%c * %s",
+ machine[5], machine + 7);
+ }
+
+ if (asprintf (&sdp, "v=0"
+ "\r\no=- "I64Fu" "I64Fu" IN IP%c %s"
+ "\r\ns=%s"
+ "\r\ni=%s"
+ "%s%s" // optional URL
+ "%s%s" // optional email
+ "%s%s" // optional phone number
+ "\r\nc=%s"
// bandwidth not specified
- "t= 0 0" // one dummy time span
+ "\r\nt=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,
+ "\r\na=tool:"PACKAGE_STRING
+ "\r\na=recvonly"
+ "\r\na=type:broadcast"
+ "\r\na=charset:UTF-8"
+ "%s" // optional source filter
+ "\r\n",
+ /* o= */ now, now, connection[5], hostname,
/* s= */ name,
- /* c= */ conn) == -1)
+ /* i= */ description,
+ /* u= */ preurl, url,
+ /* e= */ premail, email,
+ /* p= */ prephone, phone,
+ /* c= */ connection,
+ /* source-filter */ sfilter) == -1)
return NULL;
return sdp;
}
+
+static char *
+vsdp_AddAttribute (char **sdp, const char *name, const char *fmt, va_list ap)
+{
+ size_t oldlen = strlen (*sdp);
+ size_t addlen =
+ sizeof ("a=:\r\n") + strlen (name) + vsnprintf (NULL, 0, fmt, ap);
+ char *ret = realloc (*sdp, oldlen + addlen);
+
+ if (ret == NULL)
+ return NULL;
+
+ oldlen += sprintf (ret + oldlen, "a=%s:", name);
+ sprintf (ret + oldlen, fmt, ap);
+ return *sdp = ret;
+}
+
+
+char *sdp_AddAttribute (char **sdp, const char *name, const char *fmt, ...)
+{
+ char *ret;
+
+ if (fmt != NULL)
+ {
+ va_list ap;
+
+ va_start (ap, fmt);
+ ret = vsdp_AddAttribute (sdp, name, fmt, ap);
+ va_end (ap);
+ }
+ else
+ {
+ size_t oldlen = strlen (*sdp);
+ ret = realloc (*sdp, oldlen + strlen (name) + sizeof ("a=\r\n"));
+ if (ret == NULL)
+ return NULL;
+
+ sprintf (ret + oldlen, "a=%s\r\n", name);
+ }
+ return ret;
+}
+
+
+char *sdp_AddMedia (char **sdp,
+ const char *type, const char *protocol, int dport,
+ unsigned pt, vlc_bool_t bw_indep, unsigned bw,
+ const char *rtpmap, const char *fmtp)
+{
+ char *newsdp, *ptr;
+ size_t inlen = strlen (*sdp), outlen = inlen;
+
+ /* Some default values */
+ if (type == NULL)
+ type = "video";
+ if (protocol == NULL)
+ protocol = "RTP/AVP";
+ assert (pt < 128u);
+
+ outlen += snprintf (NULL, 0,
+ "m=%s %u %s %d\r\n"
+ "b=RR:0\r\n",
+ type, dport, protocol, pt);
+
+ newsdp = realloc (*sdp, outlen + 1);
+ if (newsdp == NULL)
+ return NULL;
+
+ *sdp = newsdp;
+ ptr = newsdp + inlen;
+
+ ptr += sprintf (ptr, "m=%s %u %s %d\r\n"
+ "b=RR:0\r\n",
+ type, dport, protocol, pt);
+
+ /* RTP payload type map */
+ if (rtpmap != NULL)
+ sdp_AddAttribute ("rtpmap", "%u %s", pt, rtpmap);
+ /* Format parameters */
+ if (fmtp != NULL)
+ sdp_AddAttribute ("fmtp", "%u %s", pt, fmtp);
+
+ return newsdp;
+}
projects / vlc / blobdiff