Huawei ME906s-158 (a.k.a. HP lt4132) IPv6 support

[Tore Anderson]

* Bjørn Mork

> Having access to the full power of QMI is an advantage if you want to do
> "advanced" stuff like cell monitoring etc. But if you can run QMI over
> MBIM, and then there is absolutely no reason to use the more cumbersome
> configuration.  MBIM is also the safer choice based on what most users
> (Windows) will use.

This reminds me: is there a way to extract any debugging logs or info
from the network activity via any of these interfaces? I.e., something à
la «[adb] logcat -b radio» on an Android device? As an example, I enjoy
testing IPv6 while roaming. When it doesn't work I would like to be
able to inspect the exact 3GPP cause codes returned from the network to
try and understand why.

> Do you see 'qmi' in the MBIM service list?:

Yup:

$ mbimcli -p -d /dev/cdc-wdm0 --query-device-services
[/dev/cdc-wdm0] Device services retrieved:
        Max DSS sessions: '0'
                Services: (12)

[...]
                          Service: 'qmi'
                             UUID: [d1a30bc2-f97a-6e43-bf65-c7e24fb0f0d3]:
                      DSS payload: 0
                Max DSS instances: 0
                             CIDs: msg (1)

Tore