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so far I've been trying a single server+single client udp chat application where both server and client should be able to communicate with each other freely(as in regular chat applications). for this I used the select() function.what I initially got to know about this function is that it demultiplexex between more than one sockets. I haven't had much success in doing so.. My question is: am I using the right approach by using select? If no,then what approach should I use to acheive an asychronous udp chat application?

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You can use threads.

Whenever a client connect to the server you create a thread, this thread will call recv(), when a message is received you can verify its integrity, then the thread gice the hand to a message handler and can go back in recv() mode.

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so you are suggesting that I should not go for select()? – Aayman Khalid Apr 23 at 6:25
using select implies you will be polling, and polling is almost always a bad thing. – quickly_now Apr 23 at 6:42
@quickly_now: I don't see why select implies polling. Care to elaborate? – Mat Apr 23 at 8:38
Two important points: (1) using a single thread, (2) for an asynchronous application. Then this implies use of select with some kind of timeout, and thats polling (by definition). If select is used with a very long or infinite timeout, then its not polling (its just waiting) but for the progam to do anything useful it would need to use another thread. – quickly_now Apr 24 at 2:09

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