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fc667b98e0
* Fix EDNS0 compliance Do SizeAndDo in the server (ScrubWriter) and remove all uses of this from the plugins. Also *always* do it. This is to get into compliance for https://dnsflagday.net/. The pkg/edns0 now exports the EDNS0 options we understand; this is exported to allow plugins add things there. The *rewrite* plugin used this to add custom EDNS0 option codes that the server needs to understand. This also needs a new release of miekg/dns because it triggered a race-condition that was basicly there forever. See: * https://github.com/miekg/dns/issues/857 * https://github.com/miekg/dns/pull/859 Running a test instance and pointing the https://ednscomp.isc.org/ednscomp to it shows the tests are now fixed: ~~~ EDNS Compliance Tester Checking: 'miek.nl' as at 2018-12-01T17:53:15Z miek.nl. @147.75.204.203 (drone.coredns.io.): dns=ok edns=ok edns1=ok edns@512=ok ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok miek.nl. @2604:1380:2002:a000::1 (drone.coredns.io.): dns=ok edns=ok edns1=ok edns@512=ok ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok All Ok Codes ok - test passed. ~~~ Signed-off-by: Miek Gieben <miek@miek.nl> Signed-off-by: Miek Gieben <miek@miek.nl> * typos in comments Signed-off-by: Miek Gieben <miek@miek.nl>
34 lines
606 B
Go
34 lines
606 B
Go
package test
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import (
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"testing"
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"github.com/miekg/dns"
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)
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func TestEDNS0(t *testing.T) {
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corefile := `.:0 {
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whoami
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}
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`
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i, udp, _, err := CoreDNSServerAndPorts(corefile)
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if err != nil {
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t.Fatalf("Could not get CoreDNS serving instance: %s", err)
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}
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defer i.Stop()
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m := new(dns.Msg)
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m.SetQuestion("example.org.", dns.TypeSOA)
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m.SetEdns0(4096, true)
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resp, err := dns.Exchange(m, udp)
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if err != nil {
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t.Fatalf("Expected to receive reply, but didn't: %v", err)
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}
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opt := resp.Extra[len(resp.Extra)-1]
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if opt.Header().Rrtype != dns.TypeOPT {
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t.Errorf("Last RR must be OPT record")
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}
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}
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