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fix(dns): avoid early return when dns query refused (#2878)

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* avoid early return when dns query refused

* address reviews
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dop-bot 2024-01-02 12:03:36 +08:00 committed by GitHub
parent 44bb83033f
commit 60f7a03e1b
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 1 deletions
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3
app/dns/dns.go
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@ -215,7 +215,8 @@ func (s *DNS) LookupIP(domain string, option dns.IPOption) ([]net.IP, error) {
newError("failed to lookup ip for domain ", domain, " at server ", client.Name()).Base(err).WriteToLog()
errs = append(errs, err)
}
if err != context.Canceled && err != context.DeadlineExceeded && err != errExpectedIPNonMatch && err != dns.ErrEmptyResponse {
// 5 for RcodeRefused in miekg/dns, hardcode to reduce binary size
if err != context.Canceled && err != context.DeadlineExceeded && err != errExpectedIPNonMatch && err != dns.ErrEmptyResponse && dns.RCodeFromError(err) != 5 {
return nil, err
}
}