58 lines
1.1 KiB
Go
58 lines
1.1 KiB
Go
package pancheri
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import (
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"github.com/miekg/dns"
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"github.com/sirupsen/logrus"
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)
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type Handler struct {
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C *Config
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R *Resolver
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}
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func (h *Handler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
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// figure out how we should resolve this
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// is this in our list of authoritative domains?
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// TODO
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// okay, do we have upstream resolution enabled?
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if h.C.Resolver.Enable {
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// alright, resolve it with the resolver
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msg := new(dns.Msg)
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msg.SetReply(r)
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msg.Authoritative = true
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for _, question := range r.Question {
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answers, err := h.R.Resolve(question.Name, question.Qtype)
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if err != nil {
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logrus.Errorf("error resolving: %s", err)
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return
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}
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msg.Answer = append(msg.Answer, answers...)
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}
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err := w.WriteMsg(msg)
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if err != nil {
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logrus.Errorf("error responding: %s", err)
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return
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}
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} else {
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// alright, send an nxdomain
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msg := new(dns.Msg)
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msg.SetReply(r)
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msg.Authoritative = true
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if r.RecursionDesired {
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msg.RecursionAvailable = true
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}
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msg.Rcode = dns.RcodeNameError
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err := w.WriteMsg(msg)
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if err != nil {
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logrus.Errorf("error responding: %s", err)
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return
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}
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}
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}
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