/*
device.c -- Interaction BSD tun/tap device
Copyright (C) 2001-2005 Ivo Timmermans,
- 2001-2012 Guus Sliepen <guus@tinc-vpn.org>
+ 2001-2016 Guus Sliepen <guus@tinc-vpn.org>
2009 Grzegorz Dymarek <gregd72002@googlemail.com>
This program is free software; you can redistribute it and/or modify
#endif
#define DEFAULT_TUN_DEVICE "/dev/tun0"
-#if defined(HAVE_FREEBSD) || defined(HAVE_NETBSD)
#define DEFAULT_TAP_DEVICE "/dev/tap0"
-#else
-#define DEFAULT_TAP_DEVICE "/dev/tun0"
-#endif
typedef enum device_type {
DEVICE_TYPE_TUN,
#endif
static bool setup_device(void) {
- char *type;
+ // Find out which device file to open
if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
if(routing_mode == RMODE_ROUTER)
device = xstrdup(DEFAULT_TAP_DEVICE);
}
- if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
- iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device);
+ // Find out if it's supposed to be a tun or a tap device
+
+ char *type;
if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
if(!strcasecmp(type, "tun"))
device_type = DEVICE_TYPE_TAP;
}
+ // Open the device
+
switch(device_type) {
#ifdef ENABLE_TUNEMU
case DEVICE_TYPE_TUNEMU: {
fcntl(device_fd, F_SETFD, FD_CLOEXEC);
#endif
+ // Guess what the corresponding interface is called
+
+ char *realname;
+
+#if defined(HAVE_FDEVNAME)
+ realname = fdevname(device_fd) ? : device;
+#elif defined(HAVE_DEVNAME)
+ struct stat buf;
+ if(!fstat(device_fd, &buf))
+ realname = devname(buf.st_rdev, S_IFCHR) ? : device;
+#else
+ realname = device;
+#endif
+
+ if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
+ iface = xstrdup(strrchr(realname, '/') ? strrchr(realname, '/') + 1 : realname);
+ else if(strcmp(iface, strrchr(realname, '/') ? strrchr(realname, '/') + 1 : realname))
+ logger(LOG_WARNING, "Warning: Interface does not match Device. $INTERFACE might be set incorrectly.");
+
+ // Configure the device as best as we can
+
switch(device_type) {
default:
device_type = DEVICE_TYPE_TUN;
#endif
}
+#ifdef SIOCGIFADDR
+ if(overwrite_mac)
+ ioctl(device_fd, SIOCGIFADDR, mymac.x);
+#endif
+
logger(LOG_INFO, "%s is a %s", device, device_info);
return true;