Harlan Stenn wrote: >>>> In article <[EMAIL PROTECTED]>, "Mastuac" <[EMAIL PROTECTED]> writes: > > Mastuac> Hello, I'm implementing sntp on a small micro. Is there any > Mastuac> problem if I send the sntp request message with the Originate > Mastuac> Timestamp (T1) always as zero? So the offset would be t= (T2 - 0) > Mastuac> + (T3 - T4 ). The only utility of T1 is to allow the client to > Mastuac> distinguish from delayed server responses? >
That's wrong. The correct calculation is: theta = T(B) - T(A) = 1/2 * [(T2-T1) + (T3-T4)] See the NTP V4 protocol draft. (The corrected latest one as this was wrong in the previous draft). Note that there is no concept of T1 being zero, it always has a non-zero value and the protocol REQUIRES you send a T1 timestamp from the client of your local system clock in GMT in NTP timestamp format. Danny Danny _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
