void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p);
void avahi_interface_send_packet_unicast(AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, guint16 port);
void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p);
void avahi_interface_send_packet_unicast(AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, guint16 port);