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Fix DNS fallthrough incorrectly

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世界 2024-03-15 17:21:52 +08:00
parent f287856162
commit 38eaf15360
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1 changed files with 6 additions and 2 deletions
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8
route/router_dns.go
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@ -138,10 +138,13 @@ func (r *Router) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, er
response, err = r.dnsClient.Exchange(dnsCtx, transport, message, strategy) response, err = r.dnsClient.Exchange(dnsCtx, transport, message, strategy)
} }
cancel() cancel()
var rejected bool
if err != nil { if err != nil {
if errors.Is(err, dns.ErrResponseRejectedCached) { if errors.Is(err, dns.ErrResponseRejectedCached) {
rejected = true
r.dnsLogger.DebugContext(ctx, E.Cause(err, "response rejected for ", formatQuestion(message.Question[0].String())), " (cached)") r.dnsLogger.DebugContext(ctx, E.Cause(err, "response rejected for ", formatQuestion(message.Question[0].String())), " (cached)")
} else if errors.Is(err, dns.ErrResponseRejected) { } else if errors.Is(err, dns.ErrResponseRejected) {
rejected = true
r.dnsLogger.DebugContext(ctx, E.Cause(err, "response rejected for ", formatQuestion(message.Question[0].String()))) r.dnsLogger.DebugContext(ctx, E.Cause(err, "response rejected for ", formatQuestion(message.Question[0].String())))
} else if len(message.Question) > 0 { } else if len(message.Question) > 0 {
r.dnsLogger.ErrorContext(ctx, E.Cause(err, "exchange failed for ", formatQuestion(message.Question[0].String()))) r.dnsLogger.ErrorContext(ctx, E.Cause(err, "exchange failed for ", formatQuestion(message.Question[0].String())))
@ -149,9 +152,10 @@ func (r *Router) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, er
r.dnsLogger.ErrorContext(ctx, E.Cause(err, "exchange failed for <empty query>")) r.dnsLogger.ErrorContext(ctx, E.Cause(err, "exchange failed for <empty query>"))
} }
} }
if !addressLimit || err == nil { if addressLimit && rejected {
break continue
} }
break
} }
} }
if r.dnsReverseMapping != nil && len(message.Question) > 0 && response != nil && len(response.Answer) > 0 { if r.dnsReverseMapping != nil && len(message.Question) > 0 && response != nil && len(response.Answer) > 0 {