[ntp:questions] Re: NTP4 has 3 different time formats! Namly (32, 64, 128) bits wide

Danny Mayer mayer at ntp.isc.org
Thu Jul 13 11:39:10 UTC 2006

Richard B. Gilbert wrote:
> Danny Mayer wrote:
>> Richard B. Gilbert wrote:
>>> See RFC-1305 page 50.  In the description of the packet format the four
>>> timestamps are all shown as 64 bits.  AFAIK 32 and 128 bit timestamps
>>> are a figment of someone's imagination.
>> No, they are defined. You can find them in Das Buch and I believe the
>> latest version of the NTP protocol in draft for the IETF WG.
>> Danny
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> They have not been implemented, have they?  They are not yet part of a
> standard are they?
> Wherever someone may have speculated about them, I think that, until
> they become part of an adopted standard and/or are implemented, it is
> fair to call them a figment of someone's imagination!
> I believe that we run out of bits in about thirty years.  It's clear
> that we will need more.  The need for a 32-bit timestamp is less than
> clear!

Well VMS always used 64 bits for time. Windows has now added a 64 bit
version of time_t and introduced 64-bit time functions. I don't think
that the *BSD's will be far behind. Dunno about Linux or Solaris.


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