be16enc
be16enc(p + 4, uuid->time_mid);
be16enc(p + 6, uuid->time_hi_and_version);
be16enc((cp), (s)); \
be16enc(buf, (uint16_t)secs);
be16enc(buf, (uint16_t)secs);
be16enc(p + 4, uuid->time_mid);
be16enc(p + 6, uuid->time_hi_and_version);