+static AvahiSRBLookup* lookup_ref(AvahiSRBLookup *l) {
+ assert(l);
+ assert(l->ref >= 1);
+
+ l->ref++;
+ return l;
+}
+
+static AvahiSRBLookup *lookup_find(
+ AvahiSRecordBrowser *b,
+ AvahiIfIndex interface,
+ AvahiProtocol protocol,
+ AvahiLookupFlags flags,
+ AvahiKey *key) {
+
+ AvahiSRBLookup *l;
+
+ assert(b);
+
+ for (l = b->lookups; l; l = l->lookups_next) {
+
+ if ((l->interface == AVAHI_IF_UNSPEC || l->interface == interface) &&
+ (l->interface == AVAHI_PROTO_UNSPEC || l->protocol == protocol) &&
+ l->flags == flags &&
+ avahi_key_equal(l->key, key))
+
+ return l;
+ }
+
+ return NULL;
+}
+
+static void lookup_wide_area_callback(
+ AvahiWideAreaLookupEngine *e,
+ AvahiBrowserEvent event,
+ AvahiLookupResultFlags flags,
+ AvahiRecord *r,
+ void *userdata) {
+
+ AvahiSRBLookup *l = userdata;
+ AvahiSRecordBrowser *b;
+
+ assert(e);
+ assert(l);
+
+ b = l->record_browser;
+
+ if (b->dead)
+ return;
+
+ lookup_ref(l);
+
+ switch (event) {
+ case AVAHI_BROWSER_NEW:
+ assert(r);
+
+ if (r->key->clazz == AVAHI_DNS_CLASS_IN &&
+ r->key->type == AVAHI_DNS_TYPE_CNAME)
+ /* It's a CNAME record, so let's follow it. We only follow it on wide area DNS! */
+ lookup_handle_cname(l, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, AVAHI_LOOKUP_USE_WIDE_AREA, r);
+ else {
+ /* It's a normal record, so let's call the user callback */
+ assert(avahi_key_equal(r->key, l->key));
+
+ b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, event, r, flags, b->userdata);
+ }
+ break;
+
+ case AVAHI_BROWSER_REMOVE:
+ case AVAHI_BROWSER_CACHE_EXHAUSTED:
+ /* Not defined for wide area DNS */
+ abort();
+
+ case AVAHI_BROWSER_ALL_FOR_NOW:
+ case AVAHI_BROWSER_FAILURE:
+
+ b->callback(b, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, event, NULL, flags, b->userdata);
+ break;
+ }