Using Labview to read Non-protocol ethernet packets

[Andy1]

Using Labview to write a test executive for reading and eventually writing packets of data over the ethernet.  The packets are UDP-like, in the essence there is a broadcast IP address and thats about it.  I tried using UDPread.vi to see any traffic over the port, but to no avail.  Perhaps I did not program it right, but looks fairly staright forward for this application.  I later verified that I am getting "other" formatted data broadcasted using Ethereal and saved the packets to file.  So,

1) I am seeing "other" formatted broadcast data at the port.

2) what tools or VIs do I need to use to see this "other" formatted data.

Any help will be appreciated.

Andy

[Wiebe@CARYA]

Have you looked at the UDP examples that ship with LabVIEW? They seem to do
exactly what you want to do.

Regards,

Wiebe.

[Ben]

Wiebe suggestion is good if your target protocol is really UDP.

Without getting into all of the nasty details of OS's and protocol stacks...

If your protocol is actually UDP then you can harness all of the low level support that comes with LV.

If its not, then search this entire site for "Sniffer" where you will eventually find code that will let you implement Ethereal in LV using ".net".

Ben

"Co-author of the first ethernet Sniffer (written in VAX-Macro circa 1988)"

[Andy1]

Thanks guys,

I should have been a little more specific.  I tried the UDP examples and they see no traffic since it is not UDP formatted packets.  The sender is a UUT that has a user specified packet that was claimed to be "UDP", however using the Ethereal Protocol Anyalyzer and confirmed by asking the designer, it was not.  I just downloaded the "sniffer" and just by reading the description, it looks like the ticket.  Again thanks guys, and I will let you know how I make out.

Andy

[Ben]

" ...and I will let you know how I make out."

Yes please do Andy!

I can't get into the mud on every project I have ever worked on but I do love to hear about others adventures!

Thank you,

Ben