qtype does not match request family

[wranders]

What happened:

When submitting request using IPv6, the state.QType() of the request is dns.TypeA.

state.Family() correctly denotes the request is IPv6.

What you expected to happen:

I would think that state.Family() returning 2, which correctly denotes the request is IPv6,
would set the state.QType() to dns.TypeAAAA.

How to reproduce it (as minimally and precisely as possible):

Start CoreDNS with a plugin that prints dns.TypeToString[state.QType()].

Submit a request using dig -6 example.com.

Anything else we need to know?:

I'm not sure this is a bug or not, but this does seem pretty counter-intuitive.

In a plugin I'm developing, I'm currently using the following code to correct this:

func (m *MyPlugin) ServeDNS(ctx context.Context, w dns.ResponseWriter,r *dns.Msg) (int, error) {
	state := request.Request{W: w, Req: r}
	qtype := fixQType(state)
	. . .
}

func fixQType(state request.Request) uint16 {
	var qtype uint16
	switch state.QType() {
	case dns.TypeA, dns.TypeAAAA:
		switch state.Family() {
		case 1:
			qtype = dns.TypeA
		case 2:
			qtype = dns.TypeAAAA
		}
		return qtype
	default:
		return state.QType()
	}
}

Environment:

• the version of CoreDNS: v1.11.3