[zeromq-dev] Subports

[rektide]

The ability to have subports within a process would be an excellent addition
Martin.

On Tue, May 3, 2011 at 11:17 AM, Martin Sustrik <sustrik at 250bpm.com> wrote:

> Hi all,
>
> Given that there was a strong desire to have subports (multiple 0MQ
> sockets communicating via same TCP port) implemented I've spent couple
> of days on the problem.
>
> It turns out that due to constraints of BSD socket API the functionality
> can be implemtented only in a very limited way:
>
> All the sockets sharing the port have to be in a single process. There's
> no way to coexist with another process using the same port even though
> it is using different NIC, there's no way to use a specific NIC at all etc.
>
> The only systematic solution would be to have a special daemon process
> that would listen on a specific port and pass new connection (via IPC)
> to the libzmq instance that have registered for the relevant subport.
>
> The question is whether such a solution is in any way better than simply
> using different TCP ports for different 0MQ sockets.
>
> Thoughts?
> Martin
>
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