From 1cd0056ada373b64cef3e27e688e1dd8ec820d3b Mon Sep 17 00:00:00 2001
From: Joseph Henry <josephjah@gmail.com>
Date: Wed, 20 Feb 2019 16:08:37 -0800
Subject: [PATCH] Added argument checks to VirtualTap::put()

---
 src/VirtualTap.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/VirtualTap.cpp b/src/VirtualTap.cpp
index 58eba34..81b2a94 100644
--- a/src/VirtualTap.cpp
+++ b/src/VirtualTap.cpp
@@ -194,7 +194,9 @@ std::vector<InetAddress> VirtualTap::ips() const
 void VirtualTap::put(const MAC &from,const MAC &to,unsigned int etherType,
 	const void *data,unsigned int len)
 {
-	lwip_eth_rx(this, from, to, etherType, data, len);
+	if (len <= _mtu && _enabled) {
+		lwip_eth_rx(this, from, to, etherType, data, len);
+	}
 }
 
 std::string VirtualTap::deviceName() const