How do I get the username in channel_input_port_open

[MARC KURTZ]

Hello,
Does anyone know how to get the username of the user (already authenticated
and logged in) who is sending data to a forwarded tunnel from the
channel_input_port_open function in channels.c??

I've tried numerous things, and all I can get is the IP address that is
sending the data and where it is going to be sent to. All I want is the
username or the UID

Here is the chain of events that are happening:
User logs on to SSHServer and authenticates
Sets up local listening port on 2323 to forward to RemoteClient:23
User telnets to localhost:2323 and the ssh client forwards this data to
SSHServer

At this point the channel_input_port_open function gets called in the ssh
server loop. In this procedure it knows that data is coming from the
client's IP and is getting forwarded to RemoteClient to Port 23... Is there
a way to determine the connection's user name?

I'm trying to write a solution to the old "how do I limit user's forwarded
connections" problem, so if one already exists then let me know.

Please e-mail mkurtz at backbonesecurity.com because I am not subscribed to
this list...

Thank you,
Marc Kurtz
Security Engineer
Backbone Security
570-422-3493