From dfca87ba80e8e8fa6855dd60ca6d498955dc825c Mon Sep 17 00:00:00 2001
From: Arceliar <Arceliar@users.noreply.github.com>
Date: Sat, 15 May 2021 16:44:56 -0500
Subject: [PATCH] start a reader to disard traffic if the tun is disabled

---
 src/tuntap/tun.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/tuntap/tun.go b/src/tuntap/tun.go
index e8f7fcbb..6d41f59b 100644
--- a/src/tuntap/tun.go
+++ b/src/tuntap/tun.go
@@ -138,6 +138,15 @@ func (tun *TunAdapter) _start() error {
 	addr := fmt.Sprintf("%s/%d", net.IP(tun.addr[:]).String(), 8*len(address.GetPrefix())-1)
 	if current.IfName == "none" || current.IfName == "dummy" {
 		tun.log.Debugln("Not starting TUN as ifname is none or dummy")
+		go func() {
+			bs := make([]byte, tun.core.PacketConn.MTU())
+			for {
+				// Dump traffic to nowhere
+				if _, _, err := tun.core.PacketConn.ReadFrom(bs); err != nil {
+					return
+				}
+			}
+		}()
 		return nil
 	}
 	mtu := current.IfMTU