Commit e0d4a48a authored by Wim Taymans's avatar Wim Taymans
Browse files

sdp: add method to check for multicast addresses

Expose a previously internal method to check for multicast addresses.

See #634093
parent 36c9ba99
......@@ -322,33 +322,56 @@ gst_sdp_message_free (GstSDPMessage * msg)
return GST_SDP_OK;
}
static gboolean
is_multicast_address (const gchar * host_name, guint * family)
/**
* gst_sdp_address_is_multicast:
* @nettype: a network type
* @addrtype: an address type
* @addr: an address
*
* Check if the given @addr is a multicast address.
*
* Returns: TRUE when @addr is multicast.
*
* Since: 0.10.32
*/
gboolean
gst_sdp_address_is_multicast (const gchar * nettype, const gchar * addrtype,
const gchar * addr)
{
struct addrinfo hints;
struct addrinfo *ai;
struct addrinfo *res;
gboolean ret = FALSE;
g_return_val_if_fail (addr, FALSE);
/* we only support IN */
if (nettype && strcmp (nettype, "IN") != 0)
return FALSE;
memset (&hints, 0, sizeof (hints));
hints.ai_socktype = SOCK_DGRAM;
g_return_val_if_fail (host_name, FALSE);
/* set the address type as a hint */
if (addrtype) {
if (!strcmp (addrtype, "IP4"))
hints.ai_family = AF_INET;
else if (!strcmp (addrtype, "IP6"))
hints.ai_family = AF_INET6;
}
if (getaddrinfo (host_name, NULL, &hints, &res) < 0)
if (getaddrinfo (addr, NULL, &hints, &res) < 0)
return FALSE;
for (ai = res; !ret && ai; ai = ai->ai_next) {
if (ai->ai_family == AF_INET)
ret =
IN_MULTICAST (ntohl (((struct sockaddr_in *) ai->ai_addr)->sin_addr.
s_addr));
IN_MULTICAST (ntohl (((struct sockaddr_in *) ai->ai_addr)->
sin_addr.s_addr));
else
ret =
IN6_IS_ADDR_MULTICAST (&((struct sockaddr_in6 *) ai->ai_addr)->
sin6_addr);
if (ret && family)
*family = ai->ai_family;
IN6_IS_ADDR_MULTICAST (&((struct sockaddr_in6 *) ai->
ai_addr)->sin6_addr);
}
freeaddrinfo (res);
......@@ -408,12 +431,12 @@ gst_sdp_message_as_text (const GstSDPMessage * msg)
if (msg->connection.nettype && msg->connection.addrtype &&
msg->connection.address) {
guint family;
g_string_append_printf (lines, "c=%s %s %s", msg->connection.nettype,
msg->connection.addrtype, msg->connection.address);
if (is_multicast_address (msg->connection.address, &family)) {
if (family == AF_INET)
if (gst_sdp_address_is_multicast (msg->connection.nettype,
msg->connection.addrtype, msg->connection.address)) {
/* only add ttl for IP4 */
if (strcmp (msg->connection.addrtype, "IP4") == 0)
g_string_append_printf (lines, "/%u", msg->connection.ttl);
if (msg->connection.addr_number > 1)
g_string_append_printf (lines, "/%u", msg->connection.addr_number);
......@@ -1341,12 +1364,12 @@ gst_sdp_media_as_text (const GstSDPMedia * media)
const GstSDPConnection *conn = gst_sdp_media_get_connection (media, i);
if (conn->nettype && conn->addrtype && conn->address) {
guint family;
g_string_append_printf (lines, "c=%s %s %s", conn->nettype,
conn->addrtype, conn->address);
if (is_multicast_address (conn->address, &family)) {
if (family == AF_INET)
if (gst_sdp_address_is_multicast (conn->nettype, conn->addrtype,
conn->address)) {
/* only add ttl for IP4 multicast */
if (strcmp (conn->addrtype, "IP4") == 0)
g_string_append_printf (lines, "/%u", conn->ttl);
if (conn->addr_number > 1)
g_string_append_printf (lines, "/%u", conn->addr_number);
......
......@@ -286,6 +286,9 @@ gchar* gst_sdp_message_as_text (const GstSDPMessage
GstSDPResult gst_sdp_message_parse_uri (const gchar *uri, GstSDPMessage *msg);
gchar* gst_sdp_message_as_uri (const gchar *scheme, const GstSDPMessage *msg);
/* utils */
gboolean gst_sdp_address_is_multicast (const gchar *nettype, const gchar *addrtype,
const gchar *addr);
/* v=.. */
const gchar* gst_sdp_message_get_version (const GstSDPMessage *msg);
GstSDPResult gst_sdp_message_set_version (GstSDPMessage *msg, const gchar *version);
......
EXPORTS
gst_sdp_address_is_multicast
gst_sdp_media_add_attribute
gst_sdp_media_add_bandwidth
gst_sdp_media_add_connection
......
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