iu_eh_callback_t
static iu_eh_callback_t accept_event, ipc_event, rtsock_event;
iu_eh_callback_t dhcp_acknak_global;
iu_eh_callback_t dhcp_packet_lif;
static iu_eh_callback_t vrrpd_sock_handler;
static iu_eh_callback_t vrrpd_rtsock_handler;
static iu_eh_callback_t vrrpd_cmdsock_handler;
iu_register_event(iu_eh_t *eh, int fd, short events, iu_eh_callback_t *callback,
iu_event_id_t iu_register_event(iu_eh_t *, int, short, iu_eh_callback_t *,
iu_eh_callback_t *iuen_callback; /* callback to call */