More on the Orinoco + XI-825 + StrongARM platform...

[David Gibson]

On Wed, Feb 20, 2002 at 10:30:31PM -0700, Ben Greear wrote:
> 
> 
> David Gibson wrote:
> 
> 
> >
> >Huh, weirder and weirder.  The de-encapsulated packet data looks
> >correct but eth_trans_type() appears to be misbehaving.  The Ethernet
> >header is big-endian so the 08 00 protocol should give protocol 0x800,
> >not 0x8 - so it looks like there is some subtl endian problem, buried
> >within there.
> 
> 
> I added some more printing...the ntohs() value for the header seems
> correct.  The really baffling thing is that arps seem to work
> (as shown by the tcpdump trace I just sent):
> 
> I'll be more than happy to throw in some ntohs or visa/versa
> calls to test things out...but I'm unclear of exactly where
> I should start poking...
> 
> Note that the regular ethernet driver works fine, too, so I
> suspect the orinoco somehow...

Well, that's logical.  Except that at the point you're printing out
the data the packet looks fine.  In fact I just figured out that even
the protocol is ok, because skb->protocol is stored in network order.
But by the time the packet reaches tcpdump, the first two bytes of the
IP header have gone missing.  But I can't see anything in the driver
which could possibly mangle the data between your printk()s and the
netif_rx().  The IP header is even 4-byte aligned.

-- 
David Gibson			| For every complex problem there is a
david at gibson.dropbear.id.au	| solution which is simple, neat and
				| wrong.  -- H.L. Mencken
http://www.ozlabs.org/people/dgibson