rib_action
error = rib_action(RT_DEFAULT_FIB, RTM_ADD, &info, &rc);
int rib_action(uint32_t fibnum, int action, struct rt_addrinfo *info,
error = rib_action(ifp->if_fib, cmd, &info, &rc);
error = rib_action(fibnum, cmd, info, &rc);
error = rib_action(fibnum, rtm->rtm_type, &info, &rc);
error = rib_action(fibnum, RTM_DELETE, &info, &rc);
error = rib_action(RT_DEFAULT_FIB, RTM_DELETE, &info, &rc);
error = rib_action(RT_DEFAULT_FIB, RTM_ADD, &info, &rc);