From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: RPC clnt_create() adress already in use
Date: Wed, 31 Jan 2018 09:11:00 -0000 [thread overview]
Message-ID: <20180131091053.GA4223@calimero.vinschen.de> (raw)
In-Reply-To: <812cb3b6-9d28-971c-45eb-38421d817ca4@maxrnd.com>
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On Jan 31 00:15, Mark Geisert wrote:
> PAULUS, Raimund, TI-ABN wrote:
> > Hi Mark,
> >
> > in my email (https://sourceware.org/ml/cygwin/2017-12/msg00194.html) i described 2 approaches. I prefer nr 1.
> > Here the part of the source in bindresvport.c:
> > [...]
> > This causes bind() to search an unused port. I use libtirpc with this fix since several weeks and it works for me. I don't know an other way (fixing Cygwin) to success.
> > The RPC-client on my pc is started every few minutes and has to connect to the RPC-server. Without the fix libtirpc is not usable and I have to use Cygwin 1.5.18 with the old librpc.
> [...]
>
> Hi Raimund,
> Thanks for attaching the complete source for your modified bindresvport.c.
> I had been treating your setting of port to 0 as a workaround rather than as
> a solution. My misunderstanding.
>
> We can't solve the issue that way because when bind() is called with a
> zeroed port number, it picks a random port number that's often outside the
> range of ports bindresvport() is supposed to return (i.e., a port between
> STARTPORT and ENDPORT).
>
> I thought of something similar to your idea but obeying the bindresvport()
> semantics. I add a static short value named 'usecount' to the function's
> local variables. Mid-function, I have this code to choose a port number:
> if (port == 0) {
> port = ((getpid() + usecount++) % NPORTS) + STARTPORT;
> }
>
> Can you try this with your testcase(s) and make sure it works for you?
I'm a bit puzzled here in terms of using your own bindresvport. Cygwin
implements bindresvport{_sa} for quite some time, 2006 or earlier.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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next prev parent reply other threads:[~2018-01-31 9:11 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-30 10:07 PAULUS, Raimund, TI-ABN
2018-01-31 8:15 ` Mark Geisert
2018-01-31 9:11 ` Corinna Vinschen [this message]
2018-01-31 9:35 ` Mark Geisert
2018-02-02 8:11 ` Mark Geisert
-- strict thread matches above, loose matches on Subject: below --
2018-03-08 11:44 PAULUS, Raimund, TI-ABN
2018-03-08 15:24 ` Corinna Vinschen
2018-03-08 23:00 ` Mark Geisert
2018-03-02 10:39 PAULUS, Raimund, TI-ABN
2018-02-27 9:54 PAULUS, Raimund, TI-ABN
2018-02-27 10:37 ` Corinna Vinschen
2018-02-28 6:00 ` Mark Geisert
2018-02-06 11:29 PAULUS, Raimund, TI-ABN
2018-02-06 14:20 ` Corinna Vinschen
2018-02-07 6:54 ` Mark Geisert
2018-02-05 14:58 PAULUS, Raimund, TI-ABN
2018-02-05 8:19 PAULUS, Raimund, TI-ABN
2018-02-05 10:29 ` Mark Geisert
2018-02-05 11:26 ` Corinna Vinschen
2018-02-05 13:34 ` Corinna Vinschen
2018-02-05 14:06 ` Corinna Vinschen
2018-02-05 20:15 ` Corinna Vinschen
2018-02-02 12:58 PAULUS, Raimund, TI-ABN
2018-01-30 7:01 PAULUS, Raimund, TI-ABN
2018-01-30 9:05 ` Mark Geisert
2017-12-19 16:13 PAULUS, Raimund, TI-ABN
2017-12-28 0:03 ` Mark Geisert
2017-09-29 9:52 PAULUS, Raimund, TI-ABN
2017-09-29 17:36 ` Mark Geisert
2017-09-27 12:51 PAULUS, Raimund, TI-ABN
2017-09-25 6:44 PAULUS, Raimund, TI-ABN
2017-09-27 9:50 ` Mark Geisert
2017-09-22 7:22 PAULUS, Raimund, TI-ABN
2017-09-24 9:49 ` Mark Geisert
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