Zacco a écrit :

Actually, the source address would be more important in my case, as my 
clients (each with different IP address) wants to connect to the same 
server, i.e. to the same address and port.

I dont understand why you need many sockets then.

A single socket should be enough.

I think, the current design is fair enough for server implementations 
and for regular clients. But even though my application is not tipical, 
as far as I know (but it can be important with the fast performance 
growth of regular PCs), the make-up should be general enough to cope 
with special circumstances, like mine. My initial idea was to somehow 
include the complete socket pair, i.e. source address:port and 
destination address:port, keeping in mind that it should work for both 
IPv4 and IPv6. Maybe it's an overkill, I don't know.

Could you send me a copy of your application source, or detailed specs, 
because I am confused right now...