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Re: [Qemu-devel] [PATCH] add VNC reverse connections

From: Daniel P. Berrange
Subject: Re: [Qemu-devel] [PATCH] add VNC reverse connections
Date: Wed, 16 Jan 2008 16:35:39 +0000
User-agent: Mutt/1.4.1i

On Wed, Jan 16, 2008 at 07:09:03AM -0800, Eddie Kohler wrote:
> Daniel P. Berrange wrote:
> >We already have the ability to pass multiple flags / options to the VNC
> >driver as a post-fix to the host:port pair, so I'm not a fan of introducing
> >a new option as a prefix. If using existing options syntax, it could look
> >like:
> >
> >  -vnc :5500,rev
> >  -vnc read.cs.ucla.edu:5500,rev
> This doesn't feel like an option to me, though; rather a different means of 
> connecting.  Among other things, in "-vnc :0", the QEMU VNC server opens 
> port 5900.  But the client's listening port for reverse connections 
> defaults to 5500.  "-vnc :-400,rev" is clearly insane, but it seems strange 
> for an option like ",rev" to change the meaning of the port field.

Yes that is a valid point. It is a little unfortunate we switched to using
display num instead of port num for the current VNC code. Having a syntax
which makes people use negative display nums for reverse connections would
suck. So reluctantly I think your original proposal may actually be better.

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