Shikong/Clash.Meta
1
0
Fork 0
mirror of https://gitclone.com/github.com/MetaCubeX/Clash.Meta synced 2025-02-23 12:42:27 +08:00
Code Issues Packages Projects Releases Wiki Activity

fix: truncate dns message in udp response

Browse Source 
https://github.com/MetaCubeX/mihomo/issues/1168
This commit is contained in:
wwqgtxx 2024-04-09 14:16:09 +08:00
parent 72df27be44
commit bd703b8ff2
1 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
component/resolver/relay.go
View File

@ -46,7 +46,7 @@ func RelayDnsConn(ctx context.Context, conn net.Conn, readTimeout time.Duration)
ctx, cancel := context.WithTimeout(ctx, DefaultDnsRelayTimeout)
defer cancel()
inData := buff[:n]
msg, err := RelayDnsPacket(ctx, inData, buff)
msg, err := relayDnsPacket(ctx, inData, buff, 0)
if err != nil {
return err
}
@ -69,7 +69,7 @@ func RelayDnsConn(ctx context.Context, conn net.Conn, readTimeout time.Duration)
return nil
}
func RelayDnsPacket(ctx context.Context, payload []byte, target []byte) ([]byte, error) {
func relayDnsPacket(ctx context.Context, payload []byte, target []byte, maxSize int) ([]byte, error) {
msg := &D.Msg{}
if err := msg.Unpack(payload); err != nil {
return nil, err
@ -83,6 +83,14 @@ func RelayDnsPacket(ctx context.Context, payload []byte, target []byte) ([]byte,
}
r.SetRcode(msg, r.Rcode)
if maxSize > 0 {
r.Truncate(maxSize)
}
r.Compress = true
return r.PackBuffer(target)
}
// RelayDnsPacket will truncate udp message up to SafeDnsPacketSize
func RelayDnsPacket(ctx context.Context, payload []byte, target []byte) ([]byte, error) {
return relayDnsPacket(ctx, payload, target, SafeDnsPacketSize)
}