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Re: Hacking T-RBYDEUC Firmware - LE40A756 and A856
Posted: Mon Nov 30, 2009 4:41 pm
by erdem_ua
Can't you drop the linux shell via Cable? After you can start telnetd if it exist.
Or inetd program can replace that? S?nce I don't have this tv, It's hard to support.
Re: Hacking T-RBYDEUC Firmware - LE40A756 and A856
Posted: Tue Dec 01, 2009 5:05 pm
by arris69
nobody0472 wrote:HI all,
at the moment there is no way for serial, as the service menu in this model doesn't support event logging to serial or even have RS232 section.
Also no other way of getting in via serial seems to work. Have tried quite many.
But for telnet I inspected the rootfs.img a little bit more carefully, and found the following:
As of my knowledge the telnetd daemon needs a charachter-device cally ttyp0 to work, right ?
That is for sure missing in /dev in the firmware/squashfs files.
I DO have: ptyp0-ptyp6 and tty and tty0-tty9 and ttyS0-ttyS3
So is this maybe the reason why telnet isn't responding ? It seems to start, as the client tries to connect (as described before from the A756-user) it seems to have the open port, but the the connection terminates. I don't get a reason why ... but maybe it's the missing device ? Any thoughts on this ?
If so, is there a way to get this device in there ? Can the B-Model users verify, if that device is there for them, or is telnetd already fine with ptyp0 or any other device ?
Thanks,
N.
hi,
you need /dev/ptmx and /dev/pts/0 so you need to mount devpts
hth
arris
Re: Hacking T-RBYDEUC Firmware - LE40A756 and A856
Posted: Tue Dec 01, 2009 8:19 pm
by arris69
nobody0472 wrote:Well,
I do have /dec/ptmx and /dev/pts
I have also mounted devpts in start.sh, before starting telnetd.
Same result. TV seems to have a listening port, but is closing the connection immediately. No way to enter anything.
As I'm no linux-pro my knowledge is at it's boundaries. Seems, that there is no way in this firmware ...
Thanks anyway,
N.
have you tried to start
instead of telnetd?