[usocket-devel] bind interface?

[Chris Dean]

"Erik Huelsmann" <ehuels at gmail.com> writes:
> On the CMUCL development list, Chun Tian is lobbying for implementing
> this feature in it, so usocket can use it. However, he's meeting some
> resistance, because people can't envision the use-case - and as a
> matter of fact, so have I. Could you describe yours to us, so we
> understand what it is that you're trying to do?

Sure thing.  Before I do, I will mention that this is a commonly
available in many tools, ssh -b is one example.

The situation I currently have is a machine with two different
ethernet ports and two different IP addresses.  Each of these IP
addresses routes to the Internet through different gateways.  I also
have two services (call them A and B) on the Internet that I access
from this machine.

Due to factors beyond my control, service A is only authorized from IP
address #1 and service B is only authorized from IP address #2.

Binding to different local addresses lets me access both services from
the same application.  This is what I am doing now with the LispWorks
api.

Cheers,
Chris Dean