From 71a30642aa9b15d6730d8fcafa461fdeddba55ca Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Sat, 31 Jan 2009 02:28:52 +0000
Subject: started to port bsd tundevice to new ifconfig feature removed
 possible null pointer derefernce

---
 src/linux/tunDevice.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/linux/tunDevice.cpp')

diff --git a/src/linux/tunDevice.cpp b/src/linux/tunDevice.cpp
index 8fde8ae..8ab7ff8 100644
--- a/src/linux/tunDevice.cpp
+++ b/src/linux/tunDevice.cpp
@@ -127,6 +127,9 @@ int TunDevice::write(u_int8_t* buf, u_int32_t len)
   if(fd_ < 0)
     return -1;
 
+  if(!buf)
+    return 0;
+
   if(with_pi_)
   {
     struct iovec iov[2];
-- 
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