From 7bf7fb77da37559954d6aa2139b664dc78d1fae3 Mon Sep 17 00:00:00 2001
From: dovholuknf <46322585+dovholuknf@users.noreply.github.com>
Date: Fri, 31 Jul 2020 11:38:00 -0400
Subject: [PATCH] fix mtu to not overflow uint16

---
 service/ziti-tunnel/service/ipc.go   | 4 ++--
 service/ziti-tunnel/service/state.go | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/service/ziti-tunnel/service/ipc.go b/service/ziti-tunnel/service/ipc.go
index c55c5eff..bbe122f0 100644
--- a/service/ziti-tunnel/service/ipc.go
+++ b/service/ziti-tunnel/service/ipc.go
@@ -259,12 +259,12 @@ func setTunInfo(s *dto.TunnelStatus, ipv4 string, ipv4mask int) {
 		log.Errorf("error reading MTU - using 0 for MTU: (%v)", err)
 		mtu = 0
 	}
-
+	umtu := uint16(mtu)
 	//set the tun info into the state
 	s.IpInfo = &dto.TunIpInfo{
 		Ip:     ipv4,
 		DNS:    Ipv4dns,
-		MTU:    uint16(mtu),
+		MTU:    umtu,
 		Subnet: ipv4MaskString(ipnet.Mask),
 	}
 }
diff --git a/service/ziti-tunnel/service/state.go b/service/ziti-tunnel/service/state.go
index 4e86942c..a46b9ea2 100644
--- a/service/ziti-tunnel/service/state.go
+++ b/service/ziti-tunnel/service/state.go
@@ -120,7 +120,7 @@ func (t *RuntimeState) CreateTun(ipv4 string, ipv4mask int) error {
 	}
 
 	log.Infof("creating TUN device: %s", TunName)
-	tunDevice, err := tun.CreateTUN(TunName, 64*1024)
+	tunDevice, err := tun.CreateTUN(TunName, 64*1024 - 1)
 	if err == nil {
 		t.tun = &tunDevice
 		tunName, err2 := tunDevice.Name()