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plugin/file/cache: Add metadata for wildcard record responses (#5308)

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For responses synthesized by known wildcard records, publish metadata containing the wildcard record name

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>
This commit is contained in:
Chris O'Haver
2022-07-07 17:07:04 -04:00
committed by GitHub
parent e80d696502
commit 83adb8fa22
5 changed files with 93 additions and 3 deletions
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7
plugin/file/lookup.go
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@@ -6,6 +6,7 @@ import (
"github.com/coredns/coredns/core/dnsserver"
"github.com/coredns/coredns/plugin/file/rrutil"
"github.com/coredns/coredns/plugin/file/tree"
"github.com/coredns/coredns/plugin/metadata"
"github.com/coredns/coredns/request"
"github.com/miekg/dns"
@@ -214,7 +215,10 @@ func (z *Zone) Lookup(ctx context.Context, state request.Request, qname string)
// Found wildcard.
if wildElem != nil {
auth := ap.ns(do)
// set metadata value for the wildcard record that synthesized the result
metadata.SetValueFunc(ctx, "zone/wildcard", func() string {
return wildElem.Name()
})
if rrs := wildElem.TypeForWildcard(dns.TypeCNAME, qname); len(rrs) > 0 && qtype != dns.TypeCNAME {
ctx = context.WithValue(ctx, dnsserver.LoopKey{}, loop+1)
@@ -233,6 +237,7 @@ func (z *Zone) Lookup(ctx context.Context, state request.Request, qname string)
return nil, ret, nil, NoData
}
auth := ap.ns(do)
if do {
// An NSEC is needed to say no longer name exists under this wildcard.
if deny, found := tr.Prev(qname); found {