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request: stop echoing unhandled EDNS options (#8514)

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Signed-off-by: houyuwushang <liuluoqianqiu@outlook.com>
This commit is contained in:
houyuwushang
2026-09-05 09:14:53 +08:00
committed by GitHub
parent 895eab37e8
commit b6987aeb4a
6 changed files with 77 additions and 64 deletions
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18
request/edns0.go
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@@ -7,24 +7,10 @@ import (
)
func supportedOptions(o []dns.EDNS0) []dns.EDNS0 {
var supported = make([]dns.EDNS0, 0, 3)
// For as long as possible try avoid looking up in the map, because that need an Rlock.
supported := make([]dns.EDNS0, 0, 3)
for _, opt := range o {
switch code := opt.Option(); code {
case dns.EDNS0NSID:
fallthrough
case dns.EDNS0EXPIRE:
fallthrough
case dns.EDNS0COOKIE:
fallthrough
case dns.EDNS0TCPKEEPALIVE:
fallthrough
case dns.EDNS0PADDING:
if edns.SupportedOption(opt.Option()) {
supported = append(supported, opt)
default:
if edns.SupportedOption(code) {
supported = append(supported, opt)
}
}
}
return supported