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[client] Handle large DNS packets in dns route resolution (#3441)

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Viktor Liu 2025-03-05 18:57:17 +01:00 committed by GitHub
parent 60ffe0dc87
commit c111675dd8
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1 changed files with 6 additions and 0 deletions
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6
client/internal/routemanager/dnsinterceptor/handler.go
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@ -160,6 +160,12 @@ func (d *DnsInterceptor) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
return
}
// set the AuthenticatedData flag and the EDNS0 buffer size to 4096 bytes to support larger dns records
if r.Extra == nil {
r.SetEdns0(4096, false)
r.MsgHdr.AuthenticatedData = true
}
client := &dns.Client{
Timeout: 5 * time.Second,
Net: "udp",