I need to listen to Multicast Messages

[andi]

This is discussed some days before, but not enough for me to get to a running program.
helpfull will be an example, with a transmitter and a receiver, where I can select a multicast address, and I can see, that the receiver is able to receive the data. The multicast address can be for example 224.0.0.1 (Input at the transmitter). At that moment, i have no chance, to receive something at the receiver.

Thanks a lot for your help
Andy


I need to listen to Multicast Messages, and Labview Does not provide that capability. At least not that I could find. If it does then I do'nt have to worry. I have written up VI's that do most of the calling to the functions that I need to

[Ben]

There have been posting that discuss "ethernet Sniffers". You should also serach for "packet32.zip". I belive that will contain C source that will let you monitor e-net traffic. With some mods you could integrate that to just look for multicast addresses.

I do not recall the link or topic names but that is the approach you may want to take.



Ben

[MZak]

I have used PowerTCP Winsock Tool from Dart (www.dart.com) to receive multicast traffic. Once the tool is installed you can access it via ActiveX.

[Bimbam]

Some time ago, I started to write some CINs to enable LabView to join and leave multicast groups, to send and receive multicast messages. Strangly enough it worked (I'm not a C-code guru at all). Included is the LabView Library I created, some example programs and a draft documentation. Read the doc, and check it out. Comments are welcome.