SWAPLONG
rec->caplen = SWAPLONG(rec->caplen);
rec->wirelen = SWAPLONG(rec->wirelen);
rec->seconds = SWAPLONG(rec->seconds);
rec->microseconds = SWAPLONG(rec->microseconds);
p->timezone = SWAPLONG(p->timezone);
p->sigfigs = SWAPLONG(p->sigfigs);
p->snaplen = SWAPLONG(p->snaplen);
p->type = SWAPLONG(p->type);
if (SWAPLONG(ph.id) != 0xa1b2c3d4) {