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Re: kern/54435: reading TCP urgent data with MSG_OOB doesn't clear poll(2) status
The following reply was made to PR kern/54435; it has been noted by GNATS.
From: Valery Ushakov <uwe%stderr.spb.ru@localhost>
Cc: Christos Zoulas <christos%zoulas.com@localhost>
Subject: Re: kern/54435: reading TCP urgent data with MSG_OOB doesn't clear
Date: Thu, 8 Aug 2019 19:58:36 +0300
On Thu, Aug 08, 2019 at 16:10:02 +0000, Christos Zoulas wrote:
> Darwin vpn1-1.astron.com 18.7.0 Darwin Kernel Version 18.7.0: Thu Jun 20 =
> 18:42:21 PDT 2019; root:xnu-4903.270.47~4/RELEASE_X86_64 x86_64
> reading urgent data with MSG_OOB
> poll: revents =3D 0x93: HUP IN PRI RDBAND
Ah, macos spamming POLLHUP on peer's half-close...
I've put my current test code at http://www.stderr.spb.ru/~uwe/netbsd/oob/
Not pasting it here as I'm still playing with it.
oobserv can now take the send pattern on the command line
n - send a byte
u - send(MSG_OOB) a byte
+ - sleep for 1 second
0 - sleep forever
So you can do ./oobserv nu0 to serve the busy-wait example I mentioned
oobrecv has dropped the stupid "retry" experiment.
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