NH_LOOPBACK_OUT
HOOK_EVENT_INIT(&ipst->ips_ip4_loopback_out_event, NH_LOOPBACK_OUT);
HOOK_EVENT_INIT(&ipst->ips_ip6_loopback_out_event, NH_LOOPBACK_OUT);
NH_LOOPBACK_OUT, ifs_ipfhook6_loop_out);
NH_LOOPBACK_OUT, ifs_ipfhook4_loop_out);
ifs->ifs_ipf_ipv4, NH_LOOPBACK_OUT,
ifs->ifs_ipf_ipv6, NH_LOOPBACK_OUT,
ifs->ifs_ipf_ipv4, NH_LOOPBACK_OUT,
ifs->ifs_ipf_ipv6, NH_LOOPBACK_OUT,
NH_LOOPBACK_OUT, ifs->ifs_ipfhook4_loop_out) != 0);
NH_LOOPBACK_OUT, ifs->ifs_ipfhook6_loop_out) != 0);