HOOK_EVENT_INIT
HOOK_EVENT_INIT(&ipst->ips_arp_physical_in_event, NH_PHYSICAL_IN);
HOOK_EVENT_INIT(&ipst->ips_arp_physical_out_event, NH_PHYSICAL_OUT);
HOOK_EVENT_INIT(&ipst->ips_arp_nic_events, NH_NIC_EVENTS);
HOOK_EVENT_INIT(&ipst->ips_ip4_physical_in_event, NH_PHYSICAL_IN);
HOOK_EVENT_INIT(&ipst->ips_ip4_physical_out_event, NH_PHYSICAL_OUT);
HOOK_EVENT_INIT(&ipst->ips_ip4_forwarding_event, NH_FORWARDING);
HOOK_EVENT_INIT(&ipst->ips_ip4_loopback_in_event, NH_LOOPBACK_IN);
HOOK_EVENT_INIT(&ipst->ips_ip4_loopback_out_event, NH_LOOPBACK_OUT);
HOOK_EVENT_INIT(&ipst->ips_ip4_nic_events, NH_NIC_EVENTS);
HOOK_EVENT_INIT(&ipst->ips_ip4_observe, NH_OBSERVE);
HOOK_EVENT_INIT(&ipst->ips_ip6_physical_in_event, NH_PHYSICAL_IN);
HOOK_EVENT_INIT(&ipst->ips_ip6_physical_out_event, NH_PHYSICAL_OUT);
HOOK_EVENT_INIT(&ipst->ips_ip6_forwarding_event, NH_FORWARDING);
HOOK_EVENT_INIT(&ipst->ips_ip6_loopback_in_event, NH_LOOPBACK_IN);
HOOK_EVENT_INIT(&ipst->ips_ip6_loopback_out_event, NH_LOOPBACK_OUT);
HOOK_EVENT_INIT(&ipst->ips_ip6_nic_events, NH_NIC_EVENTS);
HOOK_EVENT_INIT(&ipst->ips_ip6_observe, NH_OBSERVE);
HOOK_EVENT_INIT(&vnh->vnh_event_in, NH_PHYSICAL_IN);
HOOK_EVENT_INIT(&vnh->vnh_event_out, NH_PHYSICAL_OUT);