How to instantly close a TCP listen socket (a BSD one)

Hello everyone.

I'm wirting an application for an LPC Controller using Keil/Arm MDK and BSD Sockets.

In the application I close a TCP listen socket and want to reopen it a short time later. I get an Error trying after closing it and trying to bind the newly created Socket: BSD_EADDRINUSE (-17). Seems to indicate that it is in something of a TIME_WAIT state, so I can't reuse that port until the set time passed.

This would be perfectly fine for a connection socket. But for a listen socket, I don't see the point. After closing it no connection would be accepted any more anyway. setsockopt() exists but SO_REUSEADDR is not implemented by the MDK. So how would I try to work around this?

Thanks for any help.