Re: Request for UDP Help

I agree with others that this is a fairly trivial problem but I'll try to be
slightly more helpful. I think you have made the problem more complicated
by conceptualizing it as a "switch" from UDP to TCP. A simple construction
of this problem is:
1. A server sends a UDP broadcast, perhaps periodically, advertising a
service capability. The broadcast includes a TCP port for the service
connection.
2. Interested clients create a TCP socket and attempt to connect to the
server port.

1 and 2 are only related logically - there is no "switch" involved. The
solution is "trivial" because it is composed of two independent trivial
components, i.e. sending a UDP broadcast and creating/accepting a TCP
connection. You might implement each as a thread in the same process.
Changing #1 to a multi-cast makes the solution only marginally more
complicated.

Boris

"alijsyed" <alijsyed@xxxxxxxxxxx> wrote in message
news:1149853614.570461.221310@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi:

I would like to ask all of you if there is any reference code relating
to the following:

1) I need a server to broadcast a general multicast packet to all
listening CLients
2) CLients repsond back and both switch to TCP

This sounds trivial but trust me I can't find much on this.
I find a lot of stuff on UDP clients initializing the conversation but
not the server.

Any help would be appreciated. (I am trying to do this in C not C++).


Thanks

Ali



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