1IFF_UP
2IFF_BROADCAST
3IFF_DEBUG
4IFF_LOOPBACK
5IFF_POINTOPOINT
6IFF_NOTRAILERS
7IFF_RUNNING
8IFF_NOARP
9IFF_PROMISC
10IFF_ALLMULTI
11IFF_MASTER
12IFF_SLAVE
13IFF_MULTICAST
14IFF_PORTSEL
15IFF_AUTOMEDIA
16