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Date:	Thu, 20 Feb 2014 09:50:55 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: OpenSSH port forwarding bug
Message-ID:	<20140220085055.GD2246@calimero.vinschen.de>
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On Feb 20 09:36, Corinna Vinschen wrote:
> On Feb 19 17:18, Karl M wrote:
> > >>> Subject: Re: OpenSSH port forwarding bug
> > >>> Date: Wed, 12 Feb 2014 22:44:54 -0500
> > >>>
> > >>>> Hi All...
> > >>>> The following example shows the port forwarding problem.
> > >>>>
> > >>>>
> > >>>> ~
> > >>>>
> > >>>> $ ssh raven -W coyote:22
> > >>>> getsockname failed: Bad file descriptor
> > >>>> SSH-2.0-OpenSSH_6.5
> > >>>> Protocol mismatch.
> > >>>> ~
> > >>>>
> > >>>> $ ssh raven nc coyote 22
> > >>>> SSH-2.0-OpenSSH_6.5
> > >>>> Protocol mismatch.
> > >>>
> > >>> What are you trying to do?
> > >>>
> > >>>
> > >>> --
> > > --
> > Hi All...
> >=20
> > So I solved my real problem. It was a typo in my .ssh/config file that =
prevented me from being able to use the proxy command in ssh. I've used it =
for years.
> >=20
> > But there is still a minor bug in ssh, When I use a proxycommand with s=
sh with the -W option, to avoid using an external program such as netcat (n=
c) the error message "getsockname failed: Bad file descriptor" is displayed=
. The proxycommand works, but displays this error message. Using netcat doe=
s not display this error message.
> >=20
> > The example above is a STC showing the error in a more easily visible w=
ay. The names raven and coyote are local names on my network at home.
> >=20
> > I am wishing the error message into the cornfield.
>=20
> Cygwin's getsockname is called with a file descriptor -1.  I tried
> it on Linux and it occurs with the 6.5p1 version as well so it's a=20
> generic problem, still present upstream.

I reported the problem upstream:
http://lists.mindrot.org/pipermail/openssh-unix-dev/2014-February/032244.ht=
ml


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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