Patch to allow local port forwarding from an existing connection

[Markus Friedl]

On Wed, Sep 19, 2001 at 05:04:51PM -0700, Brian Wellington wrote:
> Hi.  Attached is a patch that introduces a new escape character (~c) that
> opens a command line.  From the command line, a command of the form:
> 
> 	-L port:host:hostport
> 
> can be entered, which will forward the local port, as if the same option
> has been provided on the command line.  I attempted to allow remote port
> forwards to be specified similarly, but the server disconnects with a
> protocol error (and the code is disabled now).
> 
> This is a bit of a hack, but it works, and it's something that I've been
> hoping would be added to ssh for a few years now.
> 
> The patch is against openssh-2.9p2.
> 
> Comments?  Any chance this will get integrated?
> +	fprintf(stderr, "\r\n> ");
> +	s = fgets(string, sizeof string, stdin);

i don't think reading from stdin is correct.
you need to read from the same FD as bin.

can you get the command line from 'bin' ?

or perhaps use readpass.[ch] from -current with echo enabled?

-m