server: fix reading with multicast on macOS (bluenviron/mediamtx#895)

bluenviron · Apr 21, 2022 · aa09a71 · aa09a71
1 parent 1e612f2
commit aa09a71
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/serverudpl.go b/serverudpl.go
@@ -109,10 +109,10 @@ func newServerUDPListener(
 
 		for _, intf := range intfs {
 			if (intf.Flags & net.FlagMulticast) != 0 {
-				err := p.JoinGroup(&intf, &net.UDPAddr{IP: listenIP})
-				if err != nil {
-					return nil, err
-				}
+				// do not check for errors.
+				// on macOS, there are interfaces with the multicast flag but
+				// without support for multicast, that makes this function fail.
+				p.JoinGroup(&intf, &net.UDPAddr{IP: listenIP})
 			}
 		}