Huawei E8278: already online but failed NDISDUP

[Reinhard Speyerer]

On Thu, May 26, 2016 at 11:32:47AM -0600, Daniel Drake wrote:
> On Thu, May 26, 2016 at 9:51 AM, Dan Williams <dcbw at redhat.com> wrote:
> > So with that in mind, the question is how to figure out that the device
> > is capable of HiLink/ethernet mode and expose that somehow to
> > connection managers.
> >
> > If you could run these commands on cdc-wdmX or whatever other serial
> > port the device exposes, what are the results?
> >
> > AT^U2DIAG?
> > AT^U2DIAG=?
> 
> socat - /dev/ttyUSB0
>   AT^U2DIAG=?
>   ERROR
> 
>   AT^U2DIAG?
>   ERROR
> 
> socat - /dev/cdc-wdm0
>   ^DSFLOWRPT:0000029B,00000000,00000000,0000000000000906,0000000000000E07,00000000,00000000
>   ^DSFLOWRPT:0000029D,00000000,00000000,0000000000000906,0000000000000E07,00000000,00000000
>   ^DSFLOWRPT:0000029F,00000000,00000000,0000000000000906,0000000000000E07,00000000,00000000
>   ^RSSI: 13
>   ^HCSQ: "WCDMA",39,34,55
> 
> I get a lot of messages here from the device but it doesn't seem  to
> respond to any commands, not even AT.

Hi,

my guess is that the AT interface may be running in a restricted mode while
HiLink mode is active. I own a E303s-2 which does not provide AT interfaces
at all when running in HiLink mode. For such configurations the API described
in
https://chaddyhv.wordpress.com/2012/08/13/programming-and-installing-huawei-hilink-e3131-under-linux/
may be the only possibility to get at status information or to send SMS.
According to this thread http://xdsl.at/viewtopic.php?f=40&t=55237 (in german)
some HiLink devices also seem to provide UPNP for controlling IP-related
settings.

Please note that there may be potential security problems for some devices
when running in HiLink mode as described here
http://b.fl7.de/2014/05/huawei-e303-sms-vulnerability-CVE-2014-2946.html .

Regards,
Reinhard