udpsrc: GstSocketTimestampMessage only for SCM_TIMESTAMPNS

Deserialize socket control messages as GstSocketTimestampMessage only
if (level, type) is (SOL_SOCKET, SCM_TIMESTAMPNS).

Without this patch, messages with types SCM_RIGHTS or SCM_CREDENTIALS
could be deserialized as GstSocketTimestampMessage instead of
GUnixFDMessage or GUnixCredentialsMessage from gio.

Fixes #1736

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3777>

diff --git a/subprojects/gst-plugins-good/gst/udp/gstudpsrc.c b/subprojects/gst-plugins-good/gst/udp/gstudpsrc.c
index f957007..172137a 100644 (file)
--- a/subprojects/gst-plugins-good/gst/udp/gstudpsrc.c
+++ b/subprojects/gst-plugins-good/gst/udp/gstudpsrc.c
@@ -476,7 +476,8 @@ gst_socket_timestamp_message_deserialize (gint level,
 {
   GstSocketTimestampMessage *message;
 
-  if (level != SOL_SOCKET)
+  if (level != SOL_SOCKET
+      || type != gst_socket_timestamp_message_get_msg_type (NULL))
     return NULL;
 
   if (size < sizeof (struct timespec))