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Date: Thu, 2 Sep 2004 09:47:49 +0300
From: Ruslan Ermilov <ru@freebsd.org>
To: Alfred Perlstein <alfred@freebsd.org>
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cc: "Justin T. Gibbs" <gibbs@scsiguy.com>
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cc: Brooks Davis <brooks@freebsd.org>
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Subject: Re: cvs commit: src/sbin/ifconfig ifconfig.c src/sys/net if.c if.h
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On Wed, Sep 01, 2004 at 01:44:52PM -0700, Alfred Perlstein wrote:
> * Justin T. Gibbs <gibbs@scsiguy.com> [040901 13:43] wrote:
> >=20
> > > brooks      2004-09-01 18:22:14 UTC
> > >=20
> > >   FreeBSD src repository
> > >=20
> > >   Modified files:
> > >     sbin/ifconfig        ifconfig.c=20
> > >     sys/net              if.c if.h=20
> > >   Log:
> > >   Use a spare byte in struct if_data to store the structure size with=
out
> > >   increasing it.  Add code to ifconfig to use this size to find the
> > >   sockaddr_dl after the struct if_data in the routing message.  This
> > >   allows struct if_data to grow (up to 255 bytes) without breaking
> > >   ifconfig.
> >=20
> > You could squeeze out 256 bytes if you treat 0 as meaning 256 - just li=
ke
> > the SCSI protocol.
>=20
> Or treat 0 as "look at some other location for length" of int width. :)
>=20
That wouldn't be backwards compatible, which was the intent.


Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer

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