openssh bugs - Jul 2007 - [Bug 1328] New: ControlClient uses wrong $DISPLAY.

http://bugzilla.mindrot.org/show_bug.cgi?id=1328

           Summary: ControlClient uses wrong $DISPLAY.
           Product: Portable OpenSSH
           Version: 4.6p1
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ssh
        AssignedTo: bitbucket at mindrot.org
        ReportedBy: dwmw2 at infradead.org


Created an attachment (id=1316)
 --> (http://bugzilla.mindrot.org/attachment.cgi?id=1316)
Handle multiple $DISPLAYs

When using the ControlClient feature, X programs get forwarded to the
$DISPLAY of the _master_, not the client.

The X forwarding support in the SSH protocol doesn't allow for
specifying a display for forwarded connections, but we can achieve it
by generating different 'fake authentication data' for each one, then
using that to infer which display should be used.

(We have a similar bug with agent forwarding, and no 'easy' fix for
that one without a protocol change. It has been suggested that because
we can't fix _that_ bug, we shouldn't fix _this_ bug either, for
'consistency'. That logic seems a little flawed to me. Besides, I've
tripped over the 'wrong display' thing _many_ times and I have not
_once_ been bothered by the fact that I'm using the 'wrong' agent.)


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http://bugzilla.mindrot.org/show_bug.cgi?id=1328





--- Comment #1 from David Woodhouse <dwmw2 at infradead.org>  2007-07-06
01:17:12 ---
Created an attachment (id=1317)
 --> (http://bugzilla.mindrot.org/attachment.cgi?id=1317)
pass display information through controlclient socket

If we're going to use the correct $DISPLAY it's probably a good idea to
let the controlclient tell the master which one to use.


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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
                 CC|                            |djm at mindrot.org




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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|ControlClient uses wrong    |Support multiple X11
                   |$DISPLAY.                   |forwarding in multiplexing
            Version|4.6p1                       |-current
           Platform|Other                       |All
         OS/Version|Linux                       |All




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David Woodhouse <dwmw2 at infradead.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #1316|0                           |1
        is obsolete|                            |

--- Comment #2 from David Woodhouse <dwmw2 at infradead.org>  ---
Created attachment 1856
  --> https://bugzilla.mindrot.org/attachment.cgi?id=1856
Updated multi-display patch against 5.5p1

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David Woodhouse <dwmw2 at infradead.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #1317|0                           |1
        is obsolete|                            |

--- Comment #3 from David Woodhouse <dwmw2 at infradead.org>  ---
Created attachment 1857
  --> https://bugzilla.mindrot.org/attachment.cgi?id=1857
Updated muxclient display patch against 5.5p1

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