netdev - Re: raw PF_PACKET protocol selection

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Message-ID: <20071009073437.GA1951@2ka.mipt.ru>
Date:	Tue, 9 Oct 2007 11:34:38 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
Cc:	"'Herbert Xu'" <herbert@...dor.apana.org.au>,
	netdev@...r.kernel.org
Subject: Re: raw PF_PACKET protocol selection

On Tue, Oct 09, 2007 at 09:27:38AM +0200, Joakim Tjernlund (joakim.tjernlund@...nsmode.se) wrote:
> > 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?

I only tested with IP and ARP packets - I can not say when packet was
actually received and written to log, but it does start filling up, but
maybe not immediately - it can be output buffering in shell though.

-- 
	Evgeniy Polyakov
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