mirror of
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64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
package forward
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import (
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"net"
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"strconv"
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"time"
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"github.com/coredns/coredns/plugin/dnstap/msg"
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"github.com/coredns/coredns/request"
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tap "github.com/dnstap/golang-dnstap"
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"github.com/miekg/dns"
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)
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// toDnstap will send the forward and received message to the dnstap plugin.
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func toDnstap(f *Forward, host string, state request.Request, opts options, reply *dns.Msg, start time.Time) {
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// Query
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q := new(tap.Message)
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msg.SetQueryTime(q, start)
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h, p, _ := net.SplitHostPort(host) // this is preparsed and can't err here
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port, _ := strconv.ParseUint(p, 10, 32) // same here
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ip := net.ParseIP(h)
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var ta net.Addr = &net.UDPAddr{IP: ip, Port: int(port)}
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t := state.Proto()
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switch {
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case opts.forceTCP:
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t = "tcp"
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case opts.preferUDP:
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t = "udp"
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}
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if t == "tcp" {
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ta = &net.TCPAddr{IP: ip, Port: int(port)}
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}
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// Forwarder dnstap messages are from the perspective of the downstream server
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// (upstream is the forward server)
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msg.SetQueryAddress(q, state.W.RemoteAddr())
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msg.SetResponseAddress(q, ta)
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if f.tapPlugin.IncludeRawMessage {
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buf, _ := state.Req.Pack()
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q.QueryMessage = buf
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}
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msg.SetType(q, tap.Message_FORWARDER_QUERY)
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f.tapPlugin.TapMessage(q)
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// Response
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if reply != nil {
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r := new(tap.Message)
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if f.tapPlugin.IncludeRawMessage {
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buf, _ := reply.Pack()
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r.ResponseMessage = buf
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}
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msg.SetQueryTime(r, start)
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msg.SetQueryAddress(r, state.W.RemoteAddr())
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msg.SetResponseAddress(r, ta)
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msg.SetResponseTime(r, time.Now())
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msg.SetType(r, tap.Message_FORWARDER_RESPONSE)
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f.tapPlugin.TapMessage(r)
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}
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}
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