suppress segfault when AF is unsupported

daemon/call.c

@@ -1319,7 +1319,7 @@ static void __init_interface(struct call_media *media, const str *ifname) {
 		return;
 get:
 	media->logical_intf = get_logical_interface(ifname, media->desired_family);
-	if (!media->logical_intf) {
+	if (G_UNLIKELY(!media->logical_intf)) {
 		/* legacy support */
 		if (!str_cmp(ifname, "internal"))
 			media->desired_family = __get_socket_family_enum(SF_IP4);
@@ -1328,6 +1328,11 @@ get:
 		else
 			ilog(LOG_WARNING, "Interface '"STR_FORMAT"' not found, using default", STR_FMT(ifname));
 		media->logical_intf = get_logical_interface(NULL, media->desired_family);
+		if (!media->logical_intf) {
+			ilog(LOG_WARNING, "Requested address family (%s) not supported",
+					media->desired_family->name);
+			media->logical_intf = get_logical_interface(NULL, NULL);
+		}
 	}
 //	media->local_intf = ifa = get_interface_address(media->logical_intf, media->desired_family);
 //	if (!ifa) {

daemon/media_socket.c

@@ -233,9 +233,20 @@ static GQueue __preferred_lists_for_family[__SF_LAST];
 struct logical_intf *get_logical_interface(const str *name, sockfamily_t *fam) {
 	struct logical_intf d, *lif;
 
-	if (!name || !name->s) {
+	if (G_UNLIKELY(!name || !name->s)) {
 		GQueue *q;
-		q = __interface_list_for_family(fam);
+		if (fam)
+			q = __interface_list_for_family(fam);
+		else {
+			for (int i = 0; i < __SF_LAST; i++) {
+				q = &__preferred_lists_for_family[i];
+				if (q->length)
+					goto got_some;
+			}
+			abort();
+got_some:
+			;
+		}
 		return q->head ? q->head->data : NULL;
 	}