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Thread: Help...Another Winsock problem

  1. Jun 11th, 2001, 03:47 PM #1
    snakez
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    Help...Another Winsock problem

    do any one out there know any way to write a LAN multicasting program using vb....for example...

    i would like to have a client with broadcast a signal thru the network to all connected machine and after the machine receive the signal...they all will send back a message...

    the catch is that....i dont know who is connected to the network...thats the problem...
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  2. Jun 12th, 2001, 06:30 AM #2
    JoshT
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    Doesn't multicasting use a reserved special IP address? Just send to that.
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  3. Jun 12th, 2001, 10:22 AM #3
    snakez
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    ok...but theres another problem....how if i dont know the range of the specific ip address in the network? and how to get the specific ip address at first?
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  4. Jun 12th, 2001, 11:07 AM #4
    ccoder
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    I just did a quick Google search and found some sites that may be helpful, especially http://ntrg.cs.tcd.ie/4ba2/multicast/

    I browsed the site briefly and from what I saw, it looks like you will have to use the API rather than the winsock control. The primary reason being that you will have to set some socket options such as TTL.
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