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middleware/file: Add CNAME chain support (#400)

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Up till now we would only chase 1 CNAME. Spec requires we will chase
all. This PR add support for this.  Up to 8 CNAMEs are chased (this
could be longer, by just checking for cycles, but 8 seems enough for
now).

Also add RRSIG of the first CNAME for DNSSEC.
This commit is contained in:
Miek Gieben 2016-11-09 10:02:26 +00:00 • committed by GitHub
parent 6abbe231e5
commit 4ef53081c5
4 changed files with 157 additions and 16 deletions
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4
middleware/file/ds_test.go
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@ -54,7 +54,7 @@ var dsTestCases = []test.Case{
func TestLookupDS(t *testing.T) {
zone, err := Parse(strings.NewReader(dbMiekNLDelegation), testzone, "stdin")
if err != nil {
t.Fatalf("expect no error when reading zone, got %q", err)
t.Fatalf("Expected no error when reading zone, got %q", err)
}
fm := File{Next: test.ErrorHandler(), Zones: Zones{Z: map[string]*Zone{testzone: zone}, Names: []string{testzone}}}
@ -66,7 +66,7 @@ func TestLookupDS(t *testing.T) {
rec := dnsrecorder.New(&test.ResponseWriter{})
_, err := fm.ServeDNS(ctx, rec, m)
if err != nil {
t.Errorf("expected no error, got %v\n", err)
t.Errorf("Expected no error, got %v\n", err)
return
}