I'm trying to figure out, why this code:
Which basically sends a 0-length UDP packet to a server and polls
kqueue events on the server fd.
Return 1 kevent on FreeBSD, and blocks indefinitely without
returning any events on OSX.
So far I could see that FreeBSD and OSX are treating NOTE_LOWAT
FreeBSD's NOTE_LOWAT is overriding SO_RCVLOWAT, and OSX is using
SO_RVCLOWAT as a minimum value. But, since NOTE_LOWAT is not
involved here by default, I'm failing to see where exactly this
event could pass through kqueue filter.
Could anyone with UDP and/or KQueue implementation knowledge
share some insights with me?
Thank you very much!
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