Am I being pinged?

[exo]

I need a vi that tells me if I am being pinged by a specific computer.  I've tried several things with no luck.
Where do I start? Does anybody have a vi I can use?
Thanks

[altenbach]

The ping response is a system service that is independent from LabVIEW.

If you are running windows, you might be able to do something with WinPCAP, see e.g.:

http://forums.ni.com/ni/board/message?board.id=170&thread.id=175885&jump=true

What do you actually want to do with all this?

[exo]

I'm running a process on one machine (Linux) and when the process is done, I need to move a file over to a MAC.  I've been having trouble doing this for reasons I don't  understand. ( I can transfer the file from the command line, but the same command in a script isn't working).  I thought that if I were to have the Linux machine ping the MAC when the process was done, I could pull the file over instead of trying to push it over. However, in order to do this, I need to tell that I  am being pinged.

[altenbach]

If both sides are running LaVIEW based code, you might just create some simple custom services in LabVIEW that exchange messages via UDP or datasocket.

In newer LabVIEW versions, you can also use network shared variables to communicate between the processes.

Message Edited by altenbach on 02-10-2008 03:40 PM

[exo]

No such luck. The linux side is running a c program.

[Hillary_C_E]

Hi exo,

You could set up a case structure based on using something like this post. Set your vi on the listening computer to have a loop continually check until it receives a tcp/ip command. Then stop the loop and receive the data. 

[MikeS81]

Hi exo,

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Hillary_C_E wrote:

Hi exo,

You could set up a case structure based on using something like this post. Set your vi on the listening computer to have a loop continually check until it receives a tcp/ip command. Then stop the loop and receive the data. 

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i don´t want to be the killjoy, but i think to listen on the tcp/ip connection will not be work, because a PING is a "Internet Control Message Protocol (ICM)" and this work on layer 3 while tcp works on layer 4.

Mike

[exo]

Mike, I think you are right. Beside having been unsuccessful in listening for a ping, I have found out that you need something call a sniffer.
Can I use any of the LabVIEW vi's to listen for an ftp or scp transfer?

Thanks

[Hillary_C_E]

Hi Exo,

For FTPing in LabVIEW, there are VIs. They are part of the Internet Toolkit. For more information you might want to look at the FAQ for the Internet Toolkit.

[aeastet]

The easiest way I ound to do this was to use a packet snier called Ethereal. I am not sure if they have a Linux version but it works great.