Date: Wed, 29 Aug 2001 14:07:55 -0500 From: Alfred Perlstein <bright@mu.org> To: Mike Silbersack <silby@silby.com> Cc: freebsd-net@freebsd.org Subject: Re: BPF question Message-ID: <20010829140755.T81307@elvis.mu.org> In-Reply-To: <Pine.BSF.4.30.0108291454041.45090-100000@niwun.pair.com>; from silby@silby.com on Wed, Aug 29, 2001 at 02:56:06PM -0400 References: <Pine.BSF.4.30.0108291454041.45090-100000@niwun.pair.com>
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* Mike Silbersack <silby@silby.com> [010829 13:56] wrote: > Silly question I could probably figure out myself, but thought it would be > quicker to ask here... > > When listening on an ethernet interface, are the packets you see from > yourself intercepted inside the network stack, or are you actually > sniffing them off the wire? I'm helping someone track down corrupted > packets he's seeing in tcpdump, and I'd like to know if I can locate where > the corruption may be occuring more exactly. If you look, I'm pretty sure the tap occurs in ether_input/output, which means that obviously it is up to the driver to get the packet to that point unmolested. -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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