[lwip-users] unpluging cable! how to close a socket cleanly?

[fred]

Hi Forum

i have a Problem using sockets in LWIP 1.1.1. My application is a server
which handles one socket connections.

I have the problem that when i unplug the cable during a datatransfer,
closing the socket fails. The problem occures when i plug the cabel back and
retry a connection this fails due to the one socket connection which is
already in use. 
Afer 1-4 minutes it is possible to reconnect to the socket again, due to i
guess keepalive option in the stack itself. 

The application stack which i use has a function close connections which
simply calls first lwip_recv() (i guess it checks if still data is
availible) and after that lwip_close(). But during debugging i see that the
stack hangs in the netcon_recv() and so blocks the stack.

Is there any way to close one or all sockets cleanly in lwip 1.1.1, without
waiting for the keepalive timeout ?

Regards
Fred



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