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cmd/cli: handle . domain query

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By returning FormErr response, the same behavior with ControlD.
This commit is contained in:
Cuong Manh Le
2025-01-10 18:50:39 +07:00
committed by Cuong Manh Le
parent c53a0ca1c4
commit 5db7d3577b
1 changed files with 8 additions and 1 deletions
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9
cmd/cli/dns_proxy.go
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@@ -106,11 +106,18 @@ func (p *prog) serveDNS(listenerNum string) error {
go p.detectLoop(m)
q := m.Question[0]
domain := canonicalName(q.Name)
if domain == selfCheckInternalTestDomain {
switch {
case domain == "":
answer := new(dns.Msg)
answer.SetRcode(m, dns.RcodeFormatError)
_ = w.WriteMsg(answer)
return
case domain == selfCheckInternalTestDomain:
answer := resolveInternalDomainTestQuery(ctx, domain, m)
_ = w.WriteMsg(answer)
return
}
if _, ok := p.cacheFlushDomainsMap[domain]; ok && p.cache != nil {
p.cache.Purge()
ctrld.Log(ctx, mainLog.Load().Debug(), "received query %q, local cache is purged", domain)