[lwip-devel] [bug #62231] LwIP tcp socket stalls when "plug pulled", creates leak when closed

[Brendan McDonnell]

Follow-up Comment #1, bug #62231 (group lwip):

I had a similar issue. In my case, the application had timed out and decided
to abort the transfer, but it was not telling the socket that it wanted to
abort (instead of normal shutdown/close), so the socket stayed alive, trying
to complete the transfer of the in-flight data (whose memory remained
allocated), until the socket timed out.

My solution when the application wants to abort close the connection is to use
lwip_setsockopt() to set linger on, 0 seconds, before lwip_shutdown() /
lwip_close(). As described here:

https://stackoverflow.com/a/41431236/1995714


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