[lwip-devel] [task #14395] recv of short buffer should eventually time out

[David van Moolenbroek]

Follow-up Comment #1, task #14395 (project lwip):

FWIW! After looking into this I decided to disregard the PSH flag in my
implementation altogether, instead always returning only whatever is available
when anything is available at all (modulo MSG_WAITALL, SO_RCVLOWAT etc). My
PoV is that while not considering the PSH flag may cause performance issues,
not returning available data may cause correctness issues. As far as I can
tell, the BSDs and Linux also follow the same behavior (ie no timeout), but
don't quote me on that! On Windows it appears there's a 0.5sec timeout which,
as can be expected, causes problems in some scenarios:
http://smallvoid.com/article/winnt-tcp-push-flag.htm

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