chunyu/sing-box
1
0
Fork 0
mirror of https://github.com/SagerNet/sing-box.git synced 2025-06-08 03:34:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

Handle EDNS version downgrade

Browse Source
This commit is contained in:
世界 2025-04-30 20:00:32 +08:00
parent 7d149a1d3d
commit 879303f8e6
No known key found for this signature in database
GPG Key ID: CD109927C34A63C4
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
dns/client.go
View File

@ -232,10 +232,20 @@ func (c *Client) Exchange(ctx context.Context, transport adapter.DNSTransport, m
record.Header().Ttl = timeToLive
}
}
response.Id = messageId
if !disableCache {
c.storeCache(transport, question, response, timeToLive)
}
response.Id = messageId
requestEDNSOpt := message.IsEdns0()
responseEDNSOpt := response.IsEdns0()
if responseEDNSOpt != nil && (requestEDNSOpt == nil || requestEDNSOpt.Version() < responseEDNSOpt.Version()) {
response.Extra = common.Filter(response.Extra, func(it dns.RR) bool {
return it.Header().Rrtype != dns.TypeOPT
})
if requestEDNSOpt != nil {
response.SetEdns0(responseEDNSOpt.UDPSize(), responseEDNSOpt.Do())
}
}
logExchangedResponse(c.logger, ctx, response, timeToLive)
return response, err
}