void avahi_dns_packet_free(AvahiDnsPacket *p);
void avahi_dns_packet_set_field(AvahiDnsPacket *p, guint index, guint16 v);
guint16 avahi_dns_packet_get_field(AvahiDnsPacket *p, guint index);
+void avahi_dns_packet_inc_field(AvahiDnsPacket *p, guint index);
guint8 *avahi_dns_packet_extend(AvahiDnsPacket *p, guint l);