[time-nuts] Google public NTP service

Bob Camp kb8tq at n1k.org
Wed Nov 30 15:42:58 EST 2016


Hi

I believe the point was: If you start tossing around packets that are odd sized, it is 
likely to break a lot of existing code.

Bob

> On Nov 30, 2016, at 3:35 PM, Gary E. Miller <gem at rellim.com> wrote:
> 
> Yo Poul-Henning!
> 
> On Wed, 30 Nov 2016 20:31:09 +0000
> "Poul-Henning Kamp" <phk at phk.freebsd.dk> wrote:
> 
>> --------
>> In message <F80F97D3-CE19-43B9-B37F-BE5D5F186D7E at n1k.org>, Bob Camp
>> writes:
>> 
>>>> I would support an RFC to mark the type a time an chimer is
>>>> servings. Not only smeared and UTC, but also TAI, UT, UT0, UT1,
>>>> UT2, ET, TDT, TDB, TT, TCG, TCB, GPS, etc…  
>>> 
>>> That would probably be a good point to make on the NTP list :)
>>> 
>>> The gotcha is that there is essentially zero time to approve and
>>> implement something like that before the end of next month …  
>> 
>> And no space in the NTP packets for the bits.
> 
> Not true.  NTP has provision for arbitrrary extensions to an ntp packet.
> 
> See RFC 5905. https://www.ietf.org/rfc/rfc5905.txt section 7.3:
> 
>    "The packet format consists of three components: the header itself,
>    one or more optional extension fields, and an optional message
>    authentication code (MAC). "
> 
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
> 	gem at rellim.com  Tel:+1 541 382 8588
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