b->callback(
b, b->interface, b->protocol, AVAHI_BROWSER_FAILURE, NULL,
b->flags & AVAHI_LOOKUP_USE_WIDE_AREA ? AVAHI_LOOKUP_RESULT_WIDE_AREA : AVAHI_LOOKUP_RESULT_MULTICAST,
b->callback(
b, b->interface, b->protocol, AVAHI_BROWSER_FAILURE, NULL,
b->flags & AVAHI_LOOKUP_USE_WIDE_AREA ? AVAHI_LOOKUP_RESULT_WIDE_AREA : AVAHI_LOOKUP_RESULT_MULTICAST,