How do I create, send and receive ethernet packets to UUT

[Ben]

Wow brother!

They are not making it easy on you are they.

To get into the OSI-7 layer model at level 2 is not going to be easy.

There was some recent discussions on the LV list where someone had posted a "sniffer". This will let you look at everything, but writting, that is another story.

Have you got some way of testing this device and possibly using the "sniffer" code to figure out what protocol they are using.

Even if we can figure that out, we still need to know the packets format themselves.

Can you get any doc's from the people that make the widget that may help?


For the time being the best I can do is urge you to find that posting re:sniffer and try to figure it out t
hat way.

Jeffrey Travis wrote a book Internet applications in LabVIEW (?) that was real good.

I recomend it.

I can not tell you what is involved in writing to layer 2 of the OSI-7 layer model.

Doing what I can to help,

Ben

[Ben]

It sounds like you guy are working together.

I suggest you start with a new question posted not only here but also on the LabVIEW >> general group.

Your reader-ship will be much broader. I am not going to be able to get you pass the sniffing part.

I will jump back in on the new thread if I think I can help. I watch both groups.

Ben

[jessejames]

Thanks for the leads, Ben. I'll check them out.

Actually we already know the exact format of the 802.3 packets we need to generate (and receive). They are completely custom. The problem is actually generating them from Labview. The only options in Labview are "too high" in the OSI model. As you said, getting into the OSI model at layer 2 seems to be the hard part. It looks impossible so far to implement in LabView. I'm looking into the "internet development toolkit" add-on for LV, but it seems to be a step in the wrong direction. i.e. FTP, etc. (higher in the OSI model, not lower)

Thanks again...

[Ben]

Re: internet tool kit

I have it.
You are correct! It will not help you with this project.

I guess you are not allowed to share the packet spec.

If so, please post a sample. It's been about 6 years since I lat looked at a packet, but I may be able to dig something up.

Like I said, post to LabVIEW there are some real heavy hitters on that list that just may know.

The other possibility is posting to Info-LabVIEW.

Rolf Kalbermater (sp?) watches that list and can generally answer how to questions that get this deep into the the gears provided by Windows.

Ben