netdev - Re: raw PF_PACKET protocol selection

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Message-Id: <1191914858.6682.75.camel@gentoo-jocke.transmode.se>
Date:	Tue, 09 Oct 2007 09:27:38 +0200
From:	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
Cc:	'Herbert Xu' <herbert@...dor.apana.org.au>, netdev@...r.kernel.org
Subject: Re: raw PF_PACKET protocol selection

On Tue, 2007-10-09 at 11:13 +0400, Evgeniy Polyakov wrote:
> On Tue, Oct 09, 2007 at 08:08:22AM +0200, Joakim Tjernlund (joakim.tjernlund@...nsmode.se) wrote:
> > > Your program works fine here.  You did run it as root, right?
> > 
> > Yes and ETH_P_ALL is the only protocol that prints anything
> > I am on 2.6.22
> 
> ETH_P_ARP works too.
> 
> > > Did you try stracing it?
> > 
> > Just did and now it works, it didn't yesterday :(
> > But if I change protocol to ETH_P_MOBITEX, I don't get any
> > pkgs(I did change protocol on sending side too)
> 
> Did you change eth_type_trans() to catch your proto?
> 

Just fond out something:
if I redirect my prog like so:
./sniff > log
and press Ctrl-C after a packet has been sent to it, 
it does NOT work. I don't get ANY output in my "log" file, not
even the printf("---------\n") appears.
But if I run whithout redirect it works(at least with ETH_P_BPQ)
Anyone else see this too?

  Jocke
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