ipd_check_hooks
rval = ipd_check_hooks(ins, IPD_CORRUPT, percent != 0);
rval = ipd_check_hooks(ins, IPD_DELAY, delay != 0);
rval = ipd_check_hooks(ins, IPD_DROP, percent != 0);
(void) ipd_check_hooks(ins, IPD_CORRUPT, B_FALSE);
(void) ipd_check_hooks(ins, IPD_DELAY, B_FALSE);
(void) ipd_check_hooks(ins, IPD_DROP, B_FALSE);