id_ts
start = sizeof (struct id_ts); /* skip for ICMP timestamps */
if (cc_left < sizeof (struct id_ts)) {
#define icmp_otime icmp_dun.id_ts.its_otime
#define icmp_rtime icmp_dun.id_ts.its_rtime
#define icmp_ttime icmp_dun.id_ts.its_ttime
} id_ts;