I'm trying to discover IPv6-only and dual-stacked services and only the IPv4 address of the dual-stacked services are being discovered. Using avahi I can discover the IPv6 services and both addresses of dual-stacked services, and I can use those services on the IPv6 addresses. This happens with every service I've tried (_airplay._tcp, _ipp._tcp, _http._tcp, _ssh._tcp).

Ideally, I would like to be able to specify how to handle IPv6 services:

• Do not show IPv6, only IPv4
• Prefer IPv4, search for both (default)
• Prefer IPv6, search for both
• Do not show IPv4, only IPv6

When both exist, only one service should be returned according to the precedence desired.