Date: Wed, 13 Nov 2019 19:21:14 +1100 From: Scott <freebsd-lists-5@thismonkey.com> To: Kubilay Kocak <koobs@freebsd.org> Cc: FreeBSD stable <freebsd-stable@freebsd.org>, Ed Schouten <ed@freebsd.org> Subject: Re: syslogd truncating messages on FreeBSD >11.2-R Message-ID: <20191113082114.GA75711@thismonkey.com> In-Reply-To: <5265db9a-2eb2-6911-350a-aa1ed808da59@FreeBSD.org> References: <20191109030811.GA64882@thismonkey.com> <5265db9a-2eb2-6911-350a-aa1ed808da59@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Thanks all.
Scott
On Wed, Nov 13, 2019 at 05:11:51PM +1100, Kubilay Kocak wrote:
> On 9/11/2019 2:08 pm, Scott wrote:
> > Hi,
> >
> > please let me know if there is a better forum for this.
> >
> > As of 11.3-RELEASE syslogd truncates all forwarded messages to 480 bytes for
> > IPV4 and 1180 for IPv6.
> >
> > The change occurs in the added code:
> >
> > switch (f->f_type) {
> > case F_FORW:
> > /* Truncate messages to RFC 5426 recommended size. */
> > dprintf(" %s", f->fu_forw_hname);
> > switch (f->fu_forw_addr->ai_addr->sa_family) {
> > #ifdef INET
> > case AF_INET:
> > dprintf(":%d\n",
> > ntohs(satosin(f->fu_forw_addr->ai_addr)->sin_port));
> > iovlist_truncate(il, 480);
> > break;
> > #endif
> >
> > There's more code for IPv6 and the function iovlist_truncate itself.
> >
> > This change is not turned on by a switch and happens automatically, however I
> > can't find it documented in UPDATING or the release notes. I would have
> > thought that any change in default behaviour of the system should at least be
> > documented.
> >
> > Ideally this change would have been implemented via a switch given that the
> > RFC mentioned in the code (RFC 5426) does not mandate truncation, but
> > recommends it when the network MTU is not known.
> >
> > What's the best way to reach out to the maintainer to suggest a switch to
> > turn on this code?
> >
> > Thanks,
> > Scott
>
>
> Hi Scott,
>
> Looks like this came in in base r332510 [1] via:
>
> https://reviews.freebsd.org/D15011
>
> The commit log message and review history may provide additional context
> for the behaviour change (I haven't reviewed them)
>
> I have CC'd the committer on this email, but in the meantime, and if you
> wouldn't mind, it is worth reporting the issue via Bugzilla, so that we
> track it, and so others can find it.
>
> [1] https://svnweb.freebsd.org/changeset/base/332510
>
> --
> Regards,
>
> koobs
>
>
>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20191113082114.GA75711>