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safe dns buff size

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This commit is contained in:
rookisbusy 2023-03-30 14:17:25 +08:00
parent 14a0a3c790
commit d0663277dc
1 changed files with 4 additions and 1 deletions
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5
listener/sing_tun/dns.go
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@ -110,7 +110,10 @@ func (h *ListenerHandler) NewPacketConnection(ctx context.Context, conn network.
conn2 = nil
}()
for {
buff := buf.NewPacket()
// safe size which is 1232 from https://dnsflagday.net/2020/.
// so 2048 is enough
buff := buf.NewSize(2 * 1024)
_ = conn.SetReadDeadline(time.Now().Add(DefaultDnsReadTimeout))
dest, err := conn.ReadPacket(buff)
if err != nil {
buff.Release()