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Subject: Re: RPC clnt_create() adress already in use
To: cygwin AT cygwin DOT com
References: <59D90AF8D70E9740907BACDE2BCB520836DFC167 AT RESW102 DOT resdom01 DOT local>
From: Mark Geisert <mark AT maxrnd DOT com>
Message-ID: <65e84fd3-291a-409c-668d-19c413d078aa@maxrnd.com>
Date: Tue, 30 Jan 2018 01:04:46 -0800
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PAULUS, Raimund, TI-ABN wrote:
> Hi Mark,
> as Corinna wrote in the thread " Cygwin socket option SO_REUSEADDR operates unlike Linux", the cause for the problem in libtirpc is Microsofts implementation of socket handling. If i implement a simple socket client, that is not so much of an issue, because I call the functions separately and can handle the error. Moreover in this case bind() is not necessary.
> But in the case of libtirpc the implementation of clnttcp_create() determines the sequence of bind() and connect() for the local port and you cannot correct the error of bind() after the call of connect(). Therefore I think best is to set the port number to zero (port = 0) before the call to bind().
>
> Raimund
>
>
> -----Ursprüngliche Nachricht-----
> Von: cygwin-owner AT cygwin DOT com [mailto:cygwin-owner AT cygwin DOT com] Im Auftrag von PAULUS, Raimund, TI-ABN
> Gesendet: Dienstag, 9. Januar 2018 09:14
> An: cygwin AT cygwin DOT com
> Betreff: WG: AW: RPC clnt_create() adress already in use
[...]

Hi Raimund,
Where, exactly, would you set the port number to zero?  I can imagine how this 
would solve the problem you're seeing but I'm concerned about other use cases.

It also seems a little odd to me we'd be making a Cygwin-specific patch rather 
than "fixing" Cygwin itself so the patch would not be necessary.  But I don't 
feel strongly either way here.  libtirpc already has Cygwin-specific patches.

..mark


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