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219bfd0493
* middleware/metrics: add more metrics middleware/cache: Add metrics for number of elements in the cache. Also export the total size. Update README to detail the new metrics. middleware/metrics Move metrics into subpackage called "vars". This breaks the import cycle and is cleaner. This allows vars.Report to be used in the the dnsserver to log refused queries. middleware/metrics: tests Add tests to the metrics framework. The metrics/test subpackage allows scraping of the local server. Do a few test scrape of the metrics that are defined in the metrics middleware. This also allows metrics integration tests to check if the caching and dnssec middleware export their metrics correctly. * update README * typos * fix tests
60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
// Package whoami implements a middleware that returns details about the resolving
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// querying it.
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package whoami
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import (
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"net"
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"strconv"
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"github.com/miekg/coredns/middleware"
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"github.com/miekg/coredns/request"
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"github.com/miekg/dns"
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"golang.org/x/net/context"
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)
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// Whoami is a middleware that returns your IP address, port and the protocol used for connecting
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// to CoreDNS.
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type Whoami struct {
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Next middleware.Handler
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}
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// ServeDNS implements the middleware.Handler interface.
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func (wh Whoami) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
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state := request.Request{W: w, Req: r}
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a := new(dns.Msg)
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a.SetReply(r)
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a.Compress = true
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a.Authoritative = true
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ip := state.IP()
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var rr dns.RR
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switch state.Family() {
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case 1:
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rr = new(dns.A)
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rr.(*dns.A).Hdr = dns.RR_Header{Name: state.QName(), Rrtype: dns.TypeA, Class: state.QClass()}
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rr.(*dns.A).A = net.ParseIP(ip).To4()
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case 2:
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rr = new(dns.AAAA)
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rr.(*dns.AAAA).Hdr = dns.RR_Header{Name: state.QName(), Rrtype: dns.TypeAAAA, Class: state.QClass()}
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rr.(*dns.AAAA).AAAA = net.ParseIP(ip)
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}
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srv := new(dns.SRV)
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srv.Hdr = dns.RR_Header{Name: "_" + state.Proto() + "." + state.QName(), Rrtype: dns.TypeSRV, Class: state.QClass()}
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port, _ := strconv.Atoi(state.Port())
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srv.Port = uint16(port)
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srv.Target = "."
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a.Extra = []dns.RR{rr, srv}
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state.SizeAndDo(a)
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w.WriteMsg(a)
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return 0, nil
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}
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func (wh Whoami) Name() string { return "whoami" }
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