openssh unix dev - Feb 2009 - Coding help : Where to log X11 forwards?

OpenSSH 5.1p1

I can't grasp why, when connecting with 'ssh -Y' to this
test host, I am not tickling the verbose() call below that
I have added.

I am logging as auth + verbose in sshd_config

The X11 forward for the session works fine as tested with
xterm.

At any rate, I am looking for some guidance on where
to log X11 forwards that are established, ideally with
a username and remote display information, but whatever
I can get, I'll take.

Any help would be great.

session.c:

             packet_check_eom();
             success = session_setup_x11fwd(s);
             if (!success) {
                 xfree(s->auth_proto);
                 xfree(s->auth_data);
                 s->auth_proto = NULL;
                 s->auth_data = NULL;
             } else {
                 verbose("jblaine testing : w00t? : %s",
s->auth_display);
             }

On Thu, 5 Feb 2009, Jeff Blaine wrote:
> OpenSSH 5.1p1
> 
> I can't grasp why, when connecting with 'ssh -Y' to this
> test host, I am not tickling the verbose() call below that
> I have added.
I'm not sure why the verbose isn't triggering here, but:
> At any rate, I am looking for some guidance on where
> to log X11 forwards that are established, ideally with
> a username and remote display information, but whatever
> I can get, I'll take.
You can achieve most of this by specifying a custom xauth program
using sshd_config:XAuthLocation. It could be just a shell script
that logs the parameters and the current user - no modifications to
ssh necessary.

-d

Really confused now.  Neither w00t gets tickled but the
X11 session is established fine.

% strings /linus/tmp/jblaine/sbin/sshd | grep w00t
jblaine testing : pre-w00t
jblaine testing : w00t? : %s
%

% sudo /linus/tmp/jblaine/sbin/sshd -p 3333 -ddd 2>&1 | grep w00t
%

/* session.c */
...
     debug2("jblaine testing : pre-w00t");

     packet_check_eom();
     success = session_setup_x11fwd(s);
     if (!success) {
         xfree(s->auth_proto);
         xfree(s->auth_data);
         s->auth_proto = NULL;
         s->auth_data = NULL;
     } else {
         debug2("jblaine testing : w00t? : %s", s->auth_display);
     }
...

Jeff Blaine wrote:
> OpenSSH 5.1p1
> 
> I can't grasp why, when connecting with 'ssh -Y' to this
> test host, I am not tickling the verbose() call below that
> I have added.
> 
> I am logging as auth + verbose in sshd_config
> 
> The X11 forward for the session works fine as tested with
> xterm.
> 
> At any rate, I am looking for some guidance on where
> to log X11 forwards that are established, ideally with
> a username and remote display information, but whatever
> I can get, I'll take.
> 
> Any help would be great.
> 
> session.c:
> 
>             packet_check_eom();
>             success = session_setup_x11fwd(s);
>             if (!success) {
>                 xfree(s->auth_proto);
>                 xfree(s->auth_data);
>                 s->auth_proto = NULL;
>                 s->auth_data = NULL;
>             } else {
>                 verbose("jblaine testing : w00t? : %s",
s->auth_display);
>             }
>