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all: set edns0 cookie for shared message

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For cached or singleflight messages, the edns0 cookie is currently
shared among all of them, causing mismatch cookie warning from clients.
The ctrld proxy should re-set client cookies for each request
separately, even though they use the same shared answer.
This commit is contained in:
Cuong Manh Le
2025-05-26 20:49:03 +07:00
committed by Cuong Manh Le
parent a983dfaee2
commit b4faf82f76
4 changed files with 108 additions and 3 deletions
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4
resolver.go
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@@ -305,7 +305,7 @@ func (o *osResolver) Resolve(ctx context.Context, msg *dns.Msg) (*dns.Msg, error
if val, ok := val.(*dns.Msg); ok {
Log(ctx, ProxyLogger.Load().Debug(), "hit hot cached result: %s - %s", domain, dns.TypeToString[qtype])
res := val.Copy()
res.SetRcode(msg, val.Rcode)
SetCacheReply(res, msg, val.Rcode)
return res, nil
}
}
@@ -336,7 +336,7 @@ func (o *osResolver) Resolve(ctx context.Context, msg *dns.Msg) (*dns.Msg, error
return nil, fmt.Errorf("invalid answer for key: %s", key)
}
res := sharedMsg.Copy()
res.SetRcode(msg, sharedMsg.Rcode)
SetCacheReply(res, msg, sharedMsg.Rcode)
if shared {
Log(ctx, ProxyLogger.Load().Debug(), "shared result: %s - %s", domain, dns.TypeToString[qtype])
}