[lwip-devel] [task #6930] Implement SO_LINGER

[Simon Goldschmidt]

Follow-up Comment #24, task #6930 (project lwip):

> do you think it's legitimate to recv data on a socket, and next, to set it
in "listen" mode?

That doesn't work right now: tcp_listen() tries to remove the given pcb from
the list 'bound_pcbs'. If that pcb is on the 'active_pcbs' list, it will stay
there and subsequent input packets will be given to it, although it is freed
(memp_free is called in tcp_listen).

So while it looks like it works, it doesn't really and so there should be a
check for it.

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