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Date:      Wed, 15 Sep 1999 13:04:05 -0700
From:      Mike Smith <mike@smith.net.au>
To:        nate@mt.sri.com (Nate Williams)
Cc:        "Daniel Hilevich" <danhil@cwnt.com>, freebsd-hackers@FreeBSD.ORG
Subject:   Re: How can I send signals to a network interface 
Message-ID:  <199909152004.NAA01789@dingo.cdrom.com>
In-Reply-To: Your message of "Wed, 15 Sep 1999 14:06:52 MDT." <199909152006.OAA04769@mt.sri.com> 

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> > > I know that in some other Bsd flavours you can use the sysctl functions =
> > > which is part
> > > of the ifnet struct. In FreeBsd I didn't find anything similiar to it.
> > 
> > Sysctl functions aren't "part of the ifnet struct".  You can define 
> > sysctls for your driver, if you wish, but that's the wrong way to go 
> > about doing it.
> 
> Especially since sysctl's are still not yet able to deal with multiple
> interfaces very easily.  (Feel free to correct me if I'm wrong).

You can do it, but it's not pretty, and certainly not something I'd 
recommend in the face of a fully functional alternative.

> Therefore, if you have two 'network interfaces' that are serviced by the
> same driver, it's hard to not have a sysctl change effect them both.

Actually, you can.  Have a look at the way that the kernel environment 
code handles retrieval of individual variables, and apply the same 
principle to indexing interfaces.

-- 
\\  The mind's the standard       \\  Mike Smith
\\  of the man.                   \\  msmith@freebsd.org
\\    -- Joseph Merrick           \\  msmith@cdrom.com




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