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fix(wcth): match legacy TH w/ empty DNS reply (#546)

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See https://github.com/ooni/probe/issues/1707#issuecomment-944322725
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Simone Basso 2021-10-15 16:20:07 +02:00 • committed by GitHub
commit 2fa87f0e00
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3 changed files with 11 additions and 3 deletions
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9
internal/cmd/oohelperd/internal/webconnectivity/dns.go
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@ -51,8 +51,13 @@ func dnsMapFailure(failure *string) *string {
// already checking for this specific error string.
s := webconnectivity.DNSNameError
return &s
case netxlite.FailureDNSNoAnswer,
netxlite.FailureDNSNonRecoverableFailure,
case netxlite.FailureDNSNoAnswer:
// In this case the legacy TH would produce an empty
// reply that is not attached to any error.
//
// See https://github.com/ooni/probe/issues/1707#issuecomment-944322725
return nil
case netxlite.FailureDNSNonRecoverableFailure,
netxlite.FailureDNSRefusedError,
netxlite.FailureDNSServerMisbehaving,
netxlite.FailureDNSTemporaryFailure: