Date: Sat, 09 Dec 2000 20:49:26 +0000 From: Brian Somers <brian@Awfulhak.org> To: "Patrick Bihan-Faou" <patrick@netzuno.com> Cc: "Ruslan Ermilov" <ru@FreeBSD.ORG>, freebsd-net@FreeBSD.ORG, "Brian Somers" <brian@FreeBSD.ORG>, brian@Awfulhak.org Subject: Re: Problem with PPP, tcpmssd and routing socket messages Message-ID: <200012092049.eB9KnQl54447@hak.lan.Awfulhak.org> In-Reply-To: Message from "Patrick Bihan-Faou" <patrick@netzuno.com> of "Fri, 08 Dec 2000 13:02:56 EST." <POEDLEGGIEKJJIOGHEJNOEJMCDAA.patrick@netzuno.com>
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> Hi Ruslan,
>
> >
> > I do not know what happens here, though that's me who originally added
> > the support for MTU change reports through route(4) socket:
> >
> > RCS file: /home/ncvs/src/sys/net/if.c,v
> > Working file: if.c
> > head: 1.95
> > branch:
> > locks: strict
> > access list:
> > keyword substitution: kv
> > total revisions: 116; selected revisions: 1
> > description:
> > ----------------------------
> > revision 1.83
> > date: 2000/01/24 08:53:39; author: ru; state: Exp; lines: +4 -2
> > Notify user processes about interface's MTU change.
> > Reviewed by: wollman, freebsd-net
> > ====================================================================
> >
> > Probably, if_tun.c needs a similar functionality added.
> > Sorry, I can't investigate more at this time...
> > I would suggest you to communicate with Brian Somers.
> >
>
>
> I've looked in if.c already. Isn't the code you did called for all interface
> related IOCTLs ? Namely if I do a "ioctl(s, SIOCSIFMTU, &ifr)", it should be
> first handled by if.c then dispatched to if_tun.c right ? So that means that
> in all cases the RTM_IFINFO message should be sent.
>
> The funny thing is that if I do a ifconfig tun0 mtu 1333, I see the proper
> RTM_IFINFO messages...
ppp sets the interface mtu using TUNSIFINFO rather than SIOCSIFMTU.
See src/usr.sbin/ppp/tun.c.
> Patrick.
--
Brian <brian@Awfulhak.org> <brian@[uk.]FreeBSD.org>
<http://www.Awfulhak.org>; <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !
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