Sufficient tests to determine that the WWAN0 interface is up and running?

[Ajay Garg]

Hi All.

I have a modem in QMI-mode, and through your help, I have been able to get
it up and running.


Now, my architecture is such ::

*
There is a python-script, which monitors the health of "wwan0" interface.

*
There is an application-binary in C, which uses POSIX-socket APIs to create
a socket (and the socket is created from wwan0, as that is the only active
interface).



Now, things are working fine so far.
I have put in the following tests in the python-script ::

1)
Ensure *power state: 'on' *in output of "mmcli -m modem-id".

2)
Ensure *state: 'connected' *in output of "mmcli -m modem-id".

3)
Ensure there is a ipv4 address assigned to wwan0-interface.


I run the above 3 tests every 30 seconds, and assume that if all 3 match as
expected, then the wwan0-interface is fine (and any user-applications using
POSIX-Socket APIs would continue to achieve new socket-instantiations fine).



Are the 3 tests sufficient?
Or any other tests should/must be put?


Will be grateful for pointers, that could help make the wwan-interface-up
testing bullet-proof.


Thanks and Regards,
Ajay
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