Smooth Wireless

[Graaf, Rob]

>From FreeBSD 5.x, all cards inserted/attached and removed/detached, are done
by the devd and not the pccardd. 

My card attaches itself always on wi0, so the configuration becomes:

/etc/devd.conf

attach 100 {
        device-name "wi0";
        action "echo 'starting dhclient though pccard_ether from devd.conf'
>> /var/log/messages";
        action "/etc/pccard_ether $device-name start";
};
detach 100 {
        device-name "wi0";
        # action "/etc/pccard_ether $device-name stop";
};


the pccard script is started, and dhclient uses the configuration in

/etc/dhclient.conf

interface "wi0" {
    send dhcp-client-identifier "dowould";
#    media "nwid 'mynetwork' -nwkey"; # force 'mynetwork' network
    media "nwid '' -nwkey"; # open network
    request subnet-mask, broadcast-address, routers, domain-name-servers,
domain-name, time-servers;
}

Make sure all right settings are in /etc/rc.conf
More on this on my webpage: http://www.rdegraaf.nl/freebsd/


Greetings Rob






-----Original Message-----
From: Kevin Oberman
To: Jason Dusek
Cc: mobile at freebsd.org
Sent: 7/19/04 5:59 PM
Subject: Re: Smooth Wireless 

> Date: Mon, 19 Jul 2004 10:34:40 -0500
> From: Jason Dusek <jason-dusek at uiowa.edu>
> Sender: owner-freebsd-mobile at freebsd.org
> 
> Hi Everyone,
> 
> I would like to know about the right way to set up wireless. I have
> Dell D600 with a Dell TrueMobile 1350 running CURRENT. Ndis works
> well, and I've written a shell script that brings up my wireless
> interface everytime that I boot.  However, running wireless is still
> not very smooth. I have a host of problems:
> 
>   => If I leave a wireless zone and then hook-up an ethernet cord my
computer 
> will not simply switch to the corded interface. I have to run
sysinstall.
>   => If I boot up with the ethernet configured and then enter a
wireless zone, I 
> can't simply switch to the wireless - I have to run sysinstall.
>   => If I go from one wireless zone to another, I have to run
sysinstall.
>   => Sometimes when I bring the wireless up in sysinstall, I get a
'page fault' 
> and my system crashes.

> 
> How do I get my machine to dynamically pick the interface that is
> working? And what do I do about these page faults? I have looked at
> the Handbook, etc., and while there is some useful information there I
> can't find anything that deals with changing one's interface on the
> fly.

OK. I give up. Why are you using sysinstall? I mean,this looks like a
very awkward. 

I don't know of a way to do it dynamically, but something with devd
might be possible. The basic steps to switching are:
Disable old routes. (route flush)
Configure new interface. (This usually means restarting dhclient.)
Enable new routes. (May be a no-op as dhclient should do this.)

That should be it. You might want/need to turn down the old interface
with 'ifconfig INT down'.

I tool to do most of this for you is available at:
https://projects.fsck.ch/profile/

It's still in development, but generally works on current systems. It's
based on rcng, so it will not work on V4 systems.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
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