Date: Thu, 13 Dec 2001 23:10:01 -0800 (PST) From: Yar Tikhiy <yar@FreeBSD.ORG> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/32816: ntpd/ntpdc incompatibility across the last two versions Message-ID: <200112140710.fBE7A1R67304@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR bin/32816; it has been noted by GNATS.
From: Yar Tikhiy <yar@FreeBSD.ORG>
To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
Cc: FreeBSD-gnats-submit@FreeBSD.ORG
Subject: Re: bin/32816: ntpd/ntpdc incompatibility across the last two versions
Date: Fri, 14 Dec 2001 03:42:23 +0300
On Thu, Dec 13, 2001 at 06:47:00PM -0500, Garrett Wollman wrote:
> <<On Fri, 14 Dec 2001 02:23:32 +0300 (MSK), Yar Tikhiy <yar@comp.chem.msu.su> said:
>
> > If the older ntpdc is used to talk to the newer ntpd or vice versa,
> > a packet format error occurs. That's while no such incompatibility
> > has been announced.
>
> ntpdc is never compatible across versions of ntpd, except by
> fortuitous coincidence. Dave Mills has made it clear that ntpdc's
> mode 7 control messages are specific to the version of ntpd.
Has he in a man page or private mail?
ntpdc(8) reads:
ntpdc uses NTP mode 7 packets to communicate with the NTP
server, and hence can be used to query any compatible server
on the network which permits it.
The same page reads somewhat later:
The operation of ntpdc is specific to the particular
implementation
of the ntpd(8) daemon and can be expected to work only with
this and maybe some previous versions of the daemon.
Looks rather ambiguous. To my mind, the FreeBSD ntpd maintainer
could do something about that, e.g., contact Dave Mills so he
clarifies the issue in the man page. The sentence "ntpdc version
must match that of ntpd exactly" would do much better IMHO than
the current explanation.
--
Yar
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200112140710.fBE7A1R67304>