Bad package length

[Matt Johnston]

On Mon, Nov 14, 2005 at 05:05:34PM +0800, Matt Johnston wrote:
> On Mon, Nov 14, 2005 at 03:45:01AM -0500, Li, Aubrey wrote:
> > Hi all,
> > 
> > After ported dropbear to my target board, I run dropbear in the
> > INETD_MODE.
> > I got the following error message when I ssh to my target board:
> > - - - - - - - -
> > ssh 192.168.0.15
> > Disconnecting: Bad packet length 1530147165.
> > - - - - - - - -
> > ./configure --disable-zlib --disable-wtmp --disable-openpty
> > --disable-wtmpx --disable-syslog --disable-shadow --disable-lastlog
> > --disable-utmp --disable-utmpx
> >
> >       "ssh stream tcp nowait root /bin/dropbear -i"
> 
> This packet length is 5B34315D in hex, which corresponds to
> 
> 0000000: 5b34 315d                                [41]
> 
> That looks like the standard-error log output that Dropbear
> gives when syslog is disabled, like
> "[41] Nov 14 16:51:40 Not forking" etc.
> 
> Some inetds do put standard-error out the network socket,
> and some don't - I'm not exactly sure what the expected
> behaviour should be (if anyone knows, could you share? :)

Forgot to mention, Dropbear's TRACE mode is a bad idea if
you're running with inetd for similar reasons, unless you
use a wrapper script. (Just saw the other email)

Matt

> or
> 
> 3) Make a wrapper script that runs dropbear but redirects
> stderr somewhere else, ala
> dropbear -i 2> /dev/null