+void avahi_interface_update_rrs(AvahiInterface *i, int remove_rrs);
+void avahi_interface_check_relevant(AvahiInterface *i);
+int avahi_interface_is_relevant(AvahiInterface *i);
+
+void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p);
+void avahi_interface_send_packet_unicast(AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, uint16_t port);
+
+int avahi_interface_post_query(AvahiInterface *i, AvahiKey *k, int immediately, unsigned *ret_id);
+int avahi_interface_withraw_query(AvahiInterface *i, unsigned id);
+int avahi_interface_post_response(AvahiInterface *i, AvahiRecord *record, int flush_cache, const AvahiAddress *querier, int immediately);
+int avahi_interface_post_probe(AvahiInterface *i, AvahiRecord *p, int immediately);
+
+int avahi_interface_match(AvahiInterface *i, AvahiIfIndex idx, AvahiProtocol protocol);
+int avahi_interface_address_on_link(AvahiInterface *i, const AvahiAddress *a);
+int avahi_interface_has_address(AvahiInterfaceMonitor *m, AvahiIfIndex iface, const AvahiAddress *a);
+
+AvahiInterface* avahi_interface_monitor_get_interface(AvahiInterfaceMonitor *m, AvahiIfIndex idx, AvahiProtocol protocol);