[lwip-devel] [bug #47485] tcp_close() should not fail on memory error

[Simon Goldschmidt]

Update of bug #47485 (project lwip):

                Category:         sockets/netconn => TCP                    
                 Summary: lwip_netconn_do_close_internal blocks caller during
memory error => tcp_close() should not fail on memory error

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Follow-up Comment #3:

The problem I still see here is that tcp_send_fin() can fail in
tcp_enqueue_flags() due to segment/pbuf allocation failure.

For the rest of the stack (as well as for raw API applications), it would be
easier if this failure would lead to retrying FIN instead of returning an
error. If we could ensure FIN was enqueued at some time, tcp_close() could
just return ERR_OK, which would greatly help to fix this bug.

--> changed summary & category to reflect that this is a tcp core issue

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