with http, for 4xx errors.

NewDNSGateway returns a DNS ALG, ready for use.

with http, for 5xx errors.

RegisterAddrs registers IP ports with all dialers for a given hostname.

Req sends q to transport t and returns the answer, if any; errors are unset if answer is not servfail or empty; smm, the in/out parameter, is dns summary as got from t.

pseudo transport ID to tag dns64 responses.

DNS transport types.

encoding type, base32 or base64.

encoding type, base32 or base64.

preset "forced" DNS64/NAT64.

preferred forwarding network, if any ipn.Base is treated as a no-proxy.

preferred network to use with t.Query.

"net.DefaultResolver" dnsx.Goos.

ref: datatracker.ietf.org/doc/html/rfc8880.

used by transport dnsx.System.

Transport represents a DNS query transport.

TransportMult is a hybrid: transport and a multi-transport.