TUN_IASET         384 net/if_tun.c   	tp->tun_flags &= ~(TUN_IASET|TUN_DSTADDR|TUN_BRDADDR);
TUN_IASET         392 net/if_tun.c   				tp->tun_flags |= TUN_IASET;
TUN_IASET         415 net/if_tun.c   				tp->tun_flags |= TUN_IASET;