[ntp:questions] Re: sntp: rejects packets from ntpd when "disable ntp" is used

Danny Mayer mayer at ntp.isc.org
Tue Mar 21 03:53:34 UTC 2006


Daniel Kabs wrote:
> Harlan,
> 
> thanks for pointing out that sntp does not work with an undisciplined
> clock.
> 
> In this case, one has to resort to ntpdate or patch sntp::main.c:
> 
> --- /tmp/ntp-4.2.0b-rc1/sntp/main.c 2005-12-21 00:33:36.000000000 +0100
> +++ main.c      2006-03-20 13:31:12.378670736 +0100
> @@ -457,7 +457,7 @@
>          failed = (data->mode != NTP_SERVER && data->mode != NTP_PASSIVE);
>          response = 1;
>      }
> -    if (failed || data->status == 3 || data->version < 1 ||
> +    if (failed || data->version < 1 ||
>              data->version > NTP_VERSION_MAX ||
>              data->stratum > NTP_STRATUM_MAX) {
>          if (verbose)
> 
> I will update
>   http://ntp.isc.org/bin/view/Dev/DeprecatingNtpdate
> accordingly
> 

We need to look at the protocol requirements for sntp to see if this
patch conforms, if you want to create a bug report for it. I'm not sure
that it's the right thing to do to synchronize with an undisciplined
clock. Should we move this question to the Working group?

Danny

> Cheers
> Daniel



More information about the questions mailing list