[LEDE-DEV] Open and secure firmware for Quectel 4G modems [Was: Re: Quectel EC20 QMI autoconnect issues [Was: Re: [LEDE-DEV, 3/3, v3] uqmi: Prevent 'POLICY MISMATCH' error.]]
ynezz at true.cz
Sun Jan 8 16:01:39 PST 2017
Bjørn Mork <bjorn at mork.no> [2017-01-08 23:10:20]:
> The output above comes from the Sierra Wireless EM7455 originally delivered
> as part of my Lenovo X1 Carbon, running bog standard firmare.
Oops. How did you get into the shell of your modem? Is it a root shell also?
Seems like some serial line filtering might be needed in the kernel, to limit
access to such backdoor commands like 'AT+QLINUXCMD' only to certain users :-)
It's like a bad dream, really.
> Trying not to kill the optimism here, but... But this is a project with
> about the same complexity as replacing Android on a phone.
It's not that complex, it's missing the UI part, WiFi, BLE etc. :-) But I
understand the complexity, that's why I'm trying to bring some attention into
this project, probably help little bit also.
> And IMHO it's rather pointless unless you do something about the "baseband"
It's not pointless for me. We do the same with our routers, even if we still
can't control the WiFi binary blob firmwares in majority of them. I would be
happy if I could build custom firmware image for my modem using LEDE. Why not
use the modem as the only CPU in the system? Quectel modems have quite a long
EOL, making it quite viable target.
> Which is probably not feasible due to the complete lack of any source
> code or documentation from Qualcomm.
Yep, time will show :-)
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