-
-/* If 'netdev' is a VLAN network device (e.g. one created with vconfig(8)),
- * sets '*vlan_vid' to the VLAN VID associated with that device and returns 0.
- * Otherwise returns a errno value (specifically ENOENT if 'netdev_name' is the
- * name of a network device that is not a VLAN device) and sets '*vlan_vid' to
- * -1. */
-int
-netdev_get_vlan_vid(const struct netdev *netdev, int *vlan_vid)
-{
- int error = (netdev_get_dev(netdev)->netdev_class->get_vlan_vid
- ? netdev_get_dev(netdev)->netdev_class->get_vlan_vid(netdev,
- vlan_vid)
- : ENOENT);
- if (error) {
- *vlan_vid = 0;
- }
- return error;
-}
-
-/* Returns a network device that has 'in4' as its IP address, if one exists,
- * otherwise a null pointer. */
-struct netdev *
-netdev_find_dev_by_in4(const struct in_addr *in4)
-{
- struct netdev *netdev;
- struct sset dev_list = SSET_INITIALIZER(&dev_list);
- const char *name;
-
- netdev_enumerate(&dev_list);
- SSET_FOR_EACH (name, &dev_list) {
- struct in_addr dev_in4;
-
- if (!netdev_open(name, "system", &netdev)
- && !netdev_get_in4(netdev, &dev_in4, NULL)
- && dev_in4.s_addr == in4->s_addr) {
- goto exit;
- }
- netdev_close(netdev);
- }
- netdev = NULL;
-
-exit:
- sset_destroy(&dev_list);
- return netdev;
-}