int avahi_send_dns_packet_ipv4(int fd, int iface, AvahiDnsPacket *p, const AvahiIPv4Address *a, uint16_t port);
int avahi_send_dns_packet_ipv6(int fd, int iface, AvahiDnsPacket *p, const AvahiIPv6Address *a, uint16_t port);
int avahi_send_dns_packet_ipv4(int fd, int iface, AvahiDnsPacket *p, const AvahiIPv4Address *a, uint16_t port);
int avahi_send_dns_packet_ipv6(int fd, int iface, AvahiDnsPacket *p, const AvahiIPv6Address *a, uint16_t port);