AvahiAddress *avahi_address_parse(const char *s, AvahiProtocol af, AvahiAddress *ret_addr);
/** Generate the DNS reverse lookup name for an IPv4 or IPv6 address. */
-char* avahi_reverse_lookup_name(char *ret_s, size_t length, const AvahiAddress *a);
+char* avahi_reverse_lookup_name(const AvahiAddress *a, char *ret_s, size_t length);
/** Map AVAHI_PROTO_xxx constants to Unix AF_xxx constants */
int avahi_proto_to_af(AvahiProtocol proto);