Netgraph and non-ethernet nodes?
ru at freebsd.org
Mon Apr 19 01:12:36 PDT 2004
On Mon, Apr 19, 2004 at 01:02:31AM -0700, Julian Elischer wrote:
> On Mon, 19 Apr 2004, Daniel O'Connor wrote:
> > On Mon, 19 Apr 2004 13:09, Brooks Davis wrote:
> > > On Mon, Apr 19, 2004 at 12:56:24PM +0930, Daniel O'Connor wrote:
> > > > The recent emails about the bridge code from NetBSD made me interested in
> > > > using netgraph to run snort on the combined traffic rather than having to
> > > > run 2 copies (since we tunnel our class C using gif over IP over
> > > > ethernet), however I can't see how to hook netgraph into a non-ethernet
> > > > node :(
> > > >
> > > > Does anyone know if/how you can do it? (Specifically for gif)
> > >
> > > How about nf_gif(4)?
> > Hmm, I see the man page, but no module.. Ahh, it doesn't appear to be built by
> > default..
> > And it's not on my -stable box, guess I should do a manual merge :)
> there are some basic differences between netgraph nodes in -current and
> in 4.x
> check out the differences in a few nodes (e.g. ng_sample.c)
> to see what they are.
> in particular... in 4.x and earlier, the mbuf and metadaa are handled
> separatly as arguments to things but in 5.x
> they are both held in (well a pointer is in..) a struct item.
> which is passed around... the item structure needs to be freed if you
> destroy it and there are macros to extract the mbuf and metadata
> from the item. This is because in 5.x we often need to queue teh packet
> including metadata and the 'item' is what is queued.
While we're on this topic, I wonder if you have plans to get rid
of non-funcional diffs for ng_sample.[ch] between RELENG_4 and
HEAD? If not, I could do it, and send you a patch (for RELENG_4)
ru at FreeBSD.org
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