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