On 2005-10-04, Paul Rubin <> wrote:
> Grant Edwards <[EMAIL PROTECTED]> writes:
>> > In the nomenclature of some of these applications, that kind
>> > of transfer is called a client to client connection. Both
>> > ends are called clients.
>>
>> IIRC, we were talking about TCP sockets.
> So, there's a reasonable application for wanting to open a
> listener port without binding any specific port number. Alice
> would just ask her OS to assign her a port (say it assigns
> 23789) and listen on it, instead of having to contend with
> other apps on the same IP for some specific port number. Then
> she'd send a message through the chat server asking Bob to
> connect to port 23789 on her machine.
Ah. Got it.
> I'm not sure if there's a way to do this. Do you happen to
> know?
IIRC, you just call bind() with a port number of zero, and then
use some method-or-other on the bound socket to find out what
port it's bound to.
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