Fix IPv4 multicast subscription

include/network.h

@@ -259,7 +259,7 @@ net_SockAddrIsMulticast (const struct sockaddr *addr, socklen_t len)
             struct sockaddr_in *v4 = (struct sockaddr_in *)addr;
             if (len < sizeof (*v4))
                 return VLC_FALSE;
-            return IN_MULTICAST (v4->sin_addr.s_addr) != 0;
+            return IN_MULTICAST (ntohl (v4->sin_addr.s_addr)) != 0;
         }
 #endif
 

src/network/udp.c

@@ -246,6 +246,8 @@ int net_Subscribe (vlc_object_t *obj, int fd, const struct sockaddr *addr,
             imr.ipv6mr_interface = v6->sin6_scope_id;
             memcpy (&imr.ipv6mr_multiaddr, &v6->sin6_addr, 16);
 
+            msg_Dbg (obj, "IPV6_JOIN_GROUP multicast request");
+
             if (setsockopt (fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &imr,
                             sizeof (imr)))
             {