Re: [developer] Raw ethernet packets

[Marcel Telka <marcel@telka.sk>]

On Fri, May 31, 2024 at 11:50:07AM +0200, Marcel Telka wrote:
> On Fri, May 31, 2024 at 02:03:07AM -0700, Joshua M. Clulow via illumos-developer wrote:
> > On Fri, May 31, 2024, 01:43 Marcel Telka <marcel@telka.sk> wrote:
> > 
> > > I'm trying to send a raw ethernet packet from an userland application
> > > but all my attempts so far were unsuccessful.  I basically tried two
> > > approaches (see below) but maybe both are in wrong direction.  I'd
> > > appreciate some help, suggestion or pointer to an working example or
> > > application already doing that.
> > >
> > 
> > You probably want to look at the DLPI, and in particular libdlpi:
> > 
> >     https://illumos.org/man/4P/dlpi
> > 
> > There's a simple program in the gate that demonstrates sending an ethernet
> > frame using libdlpi interfaces:
> > 
> > 
> > https://src.illumos.org/source/xref/illumos-gate/usr/src/cmd/dlutil/dlsend.c?r=20768856
> 
> I'm not sure I'll be able/allowed to use libdlpi for this, but
> definitely this is valuable suggestion.

FYI, the following works:

/usr/lib/dl/dlsend e1000g0 ff:ff:ff:ff:ff:ff

Snooped on another machine:

15:42:09.75924            ? -> (broadcast)  drops: 0 ETHER Type=DEED (Unknown), size=310 bytes

So apparently there is some way how to do that.  I just need to find how
to make it working without libdlpi/libdladm.


Thank you.

-- 
+-------------------------------------------+
| Marcel Telka   e-mail:   marcel@telka.sk  |
|                homepage: http://telka.sk/ |
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