16e50ec5f8
This methods returns an OPT record which can be used to create a new message with the same bufsize and Do bit as the original one.
35 lines
659 B
Go
35 lines
659 B
Go
// Package proxy is middleware that proxies requests.
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package proxy
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import (
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"github.com/miekg/coredns/middleware"
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"github.com/miekg/dns"
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)
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type ReverseProxy struct {
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Host string
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Client Client
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}
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func (p ReverseProxy) ServeDNS(w dns.ResponseWriter, r *dns.Msg, extra []dns.RR) error {
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var (
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reply *dns.Msg
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err error
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)
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state := middleware.State{W: w, Req: r}
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// tls+tcp ?
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if state.Proto() == "tcp" {
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reply, err = middleware.Exchange(p.Client.TCP, r, p.Host)
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} else {
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reply, err = middleware.Exchange(p.Client.UDP, r, p.Host)
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}
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if err != nil {
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return err
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}
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reply.Compress = true
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reply.Id = r.Id
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w.WriteMsg(reply)
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return nil
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}
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