MultiCast Messages to multiple clients on the same machine

Posted by Christopher Chase on Stack Overflow See other posts from Stack Overflow or by Christopher Chase
Published on 2010-04-09T02:50:13Z Indexed on 2010/04/12 0:03 UTC
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Filed under:

delphi

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delphi-7

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multicasting

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indy

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indy9

Im trying to write a server/service that broadcasts a message on the lan ever second or so, Kind of like a service discovery.

The message needs to be received by multiple client programs that could be on the same machine or different machines. But there could be more than one program on each machine running at the same time.

Im using delphi7, with indy 9.0.18

where im stuck is if i should be using UDP or IP MultiCast or if its even possible...

Ive managed to get it to work with IP Multi Cast with one client per machine, but even after many trys with different bindings.. max/min ports etc, i cant seem to find a solution.

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