r_timestamp
if (memcmp(timestamp, r->r_timestamp, NOISE_TIMESTAMP_LEN) > 0)
memcpy(r->r_timestamp, timestamp, NOISE_TIMESTAMP_LEN);
uint8_t r_timestamp[NOISE_TIMESTAMP_LEN];
uint32_t r_timestamp; /* XXX may wrap! */
r->r_timestamp = htonl(ticks);
r_timestamp(&action0);
r_timestamp(&newaction);
r_timestamp(&action0);
r_timestamp(a2);
static void r_timestamp(mousestatus_t *act);