Wireless bridging

David Gibson david at gibson.dropbear.id.au
Sun Jul 21 23:41:09 EST 2002

On Sat, Jul 20, 2002 at 06:35:55PM +1000, Jeremy wrote:
> I did have a look at your page earlier but moved on because I have orinoco cards
> (hermes chipset).

They're actually the same chipset - Prism2 is used in almost every
802.11b wireless card.  But they do have somewhat different firmwares.

> After posting I looked into it a bit more and tracked the error down to hermes_bap_pread
> in orinoco.c  If someone can tell me what a BAP is I might actually be enthused
> enough to do some debugging.

A BAP is a "Buffer Access Path" - the means used to read and write the
memory buffers in the cards.  Each one consists of a selector, offset
and data register - set the selector and offset, then read or write
the data sequentially via the data register.

But I suspect this is a red herring.  The problem is probably
structural, and probably quite simple to fix.

> I've been trialling Brad's zerconf program (zcip) and it's great for laptops.
> Incidentally I am pretty happy with handing out free internet access - no download
> cap means I don't really care if people sneak a bit.  I'm wondering if this
> attitude will become more common.
> >On Sat, 20 Jul 2002, Jeremy wrote:
> >
> >> Has anyone tried bridging a wireless and  wired network?  I've just
> >> spent the whole night trying and it seems to be impossible.  The
> >> highlight was the point where I had the bridge interface responding to
> >> pings from both sides, but still not bridging.
> >
> >Yeah, I talked about it at last CLUG meeting (or so). The way I got it
> >working is documented at:
> >
> >http://www.stillhq.com/cgi-bin/getpage?area=prism2ap&page=index.htm
> >
> >This site might go away for a little while this week as the colo
> >arrangements change...
> >
> >Note that this isn't how I do it any more. This is because it mean
> >unencrypted traffic going out on my driveway. The way I do it now is:
> >
> > - wireless machines are in their own IP range with own DHCP 

David Gibson			| For every complex problem there is a
david at gibson.dropbear.id.au	| solution which is simple, neat and
				| wrong.

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