src/linux/device.c: Fix segfault when running without `--net'.

[tinc] / src / linux / device.c

diff --git a/src/linux/device.c b/src/linux/device.c
index 0069f54..4e9591c 100644 (file)
--- a/src/linux/device.c
+++ b/src/linux/device.c
@@ -1,7 +1,7 @@
 /*
     device.c -- Interaction with Linux ethertap and tun/tap device
     Copyright (C) 2001-2005 Ivo Timmermans,
-                  2001-2006 Guus Sliepen <guus@tinc-vpn.org>
+                  2001-2009 Guus Sliepen <guus@tinc-vpn.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -63,7 +63,8 @@ bool setup_device(void)
 
        if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
 #ifdef HAVE_LINUX_IF_TUN_H
-               iface = xstrdup(netname);
+               if (netname != NULL)
+                       iface = xstrdup(netname);
 #else
                iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device);
 #endif