Re: [Boost-users] [Asio] How can you detect port collsions?

Subject: Re: [Boost-users] [Asio] How can you detect port collsions?
From: Martin Dyring-Andersen (mda_at_[hidden])
Date: 2009-07-24 06:03:07

> I am allocating port numbers on tcp connections dynamically, and must allocate
> and reserve the port number without blocking. I also have multiple instances of
> the process which needs to do this, and I'm plagued by port collisions.
>
> How do I detect, and avoid, port number collsions?

This is not ASIO, specific but hopefully it is possible using ASIO:

1) bind() socket to port 0. The IP stack should now assign a free port to the socket.
2) obtain the assigned port number using getsockname().
3) listen() / profit. :-)

Best regards,
Martin Dyring-Andersen