[lwip-devel] [bug #3168] Handling UDP/TCP PCBs upon netif address change.

[Jonathan Larmour]

Follow-up Comment #11, bug #3168 (project lwip):

Systems are allowed to generate additional error codes beyond what  the
standard lists for each function (as per
http://www.opengroup.org/onlinepubs/007908799/xsh/errors.html).

The implication is that there isn't a laid down SUS standard for what to do
here. EBADF definitely wouldn't be right though - that's what you get when
you try to perform an operation on an invalid or closed file
descriptor/socket. The socket isn't closed though - you still need to call
close() on it (in UNIX systems) to free up the resources. For lwIP the
principle would be the same - it still would need to be closed by the
application (not by the stack itself), and until it is, it returns an error.


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