After qmi-network stop, not able to disconnect with service provider (sometimes).

[Kavula Suresh]

Tried making dhcp client without first attempting to start qmi-network,
couldn't get IP address.

 Is there a way, I can disable auto-connection feature by using libqmil?

Regards,

On Sat, Sep 26, 2015 at 5:20 AM, Aleksander Morgado <
aleksander at aleksander.es> wrote:

> On Fri, Sep 25, 2015 at 11:08 PM, Kavula Suresh <kavulas at gmail.com> wrote:
> > After successful integration libqmi, qmicli and qmi-network script with
> > Sierra MC7354 embedded platform, tested most scenarios and works great.
> > Thanks a lot for library and all of your support.
> >
> > There is the one case even though we generate "/usr/bin/qmi-network
> > /dev/cdc-wdm0 stop", still we are able to ping google.com some times,
> but
> > most cases it disconnects.
> >
> >
> > To disconnect completely with service provider, is there do we need to
> use
> > any other options?
> >
> >
> > Here is the sequence (1 to 9) of commands generated from terminal for
> your
> > references:
> >
> >
> > 1. Start Connect with Service Provider:
> >
> > # /usr/bin/qmi-network /dev/cdc-wdm0 start
> > Checking data format with 'qmicli -d /dev/cdc-wdm0 --wda-get-data-format
> > '...
> > Link layer protocol retrieved: 802-3
> > Starting network with 'qmicli -d /dev/cdc-wdm0 --wds-start-network=
> > --client-no-release-cid'...
> > Saving state... (CID: 9)
> > Saving state... (PDH: 1205837040)
> > Network started successfully
> >
> > 2. Get IP Address:
> >
> > # /sbin/udhcpc -n -i wwan0
> > udhcpc (v1.21.0) started
> > Sending discover...
> > Sending select for 100.126.36.186...
> > Lease of 100.126.36.186 obtained, lease time 7200
> > deleting routers
> > route: SIOCDELRT: No such process
> > adding dns 198.224.148.135
> > adding dns 198.224.149.135
> >
> > 3. Test Connection status by googling:
> >
> > # ping google.com
> > PING google.com (63.84.3.23): 56 data bytes
> > 64 bytes from 63.84.3.23: seq=0 ttl=52 time=60.635 ms
> > 64 bytes from 63.84.3.23: seq=1 ttl=52 time=337.837 ms
> > 64 bytes from 63.84.3.23: seq=2 ttl=52 time=293.348 ms
> > 64 bytes from 63.84.3.23: seq=3 ttl=52 time=243.975 ms
> > 64 bytes from 63.84.3.23: seq=4 ttl=52 time=191.595 ms
> >
> > --- google.com ping statistics ---
> > 5 packets transmitted, 5 packets received, 0% packet loss
> > round-trip min/avg/max = 60.635/225.478/337.837 ms
> >
> > 4. Get network status:
> >
> > # /usr/bin/qmi-network /dev/cdc-wdm0 status
> > Loading previous state...
> >     Previous CID: 9
> >     Previous PDH: 1205837040
> > Getting status with 'qmicli -d /dev/cdc-wdm0
> --wds-get-packet-service-status
> > --client-cid=9 --client-no-release-cid'...
> > Status: connected
> >
> > 5. Test Connection status by googling:
> >
> > # ping google.com
> > PING google.com (63.84.3.21): 56 data bytes
> > 64 bytes from 63.84.3.21: seq=0 ttl=52 time=66.322 ms
> > 64 bytes from 63.84.3.21: seq=1 ttl=52 time=119.481 ms
> > 64 bytes from 63.84.3.21: seq=2 ttl=52 time=68.153 ms
> > [2]+  Stopped                    ping google.com
> >
> >
> > 6. Stop Network connection:
> >
> > # /usr/bin/qmi-network /dev/cdc-wdm0 stop
> > Loading previous state...
> >     Previous CID: 9
> >     Previous PDH: 1205837040
> > Stopping network with 'qmicli -d /dev/cdc-wdm0
> --wds-stop-network=1205837040
> > --client-cid=9'...
> > Network stopped successfully
> > Clearing state...
> >
> >
> > 7. Check is disconnected from service provider or not by googling......,
> no
> > we are not able to disconnect with service provider.
> >
> > # ping google.com
> > PING google.com (63.84.3.21): 56 data bytes
> > 64 bytes from 63.84.3.21: seq=0 ttl=52 time=57.319 ms
> > 64 bytes from 63.84.3.21: seq=1 ttl=52 time=307.718 ms
> > 64 bytes from 63.84.3.21: seq=2 ttl=52 time=249.398 ms
> > [3]+  Stopped                    ping google.com
> >
> >
> > 8. Re-Stop Network connection:
> >
> > # /usr/bin/qmi-network /dev/cdc-wdm0 stop
> > Network already stopped
> > Clearing state...
> >
> > 9. Check once again:
> >
> > # ping google.com
> > PING google.com (63.84.3.25): 56 data bytes
> > 64 bytes from 63.84.3.25: seq=0 ttl=52 time=60.324 ms
> > 64 bytes from 63.84.3.25: seq=1 ttl=52 time=293.281 ms
> > 64 bytes from 63.84.3.25: seq=2 ttl=52 time=241.974 ms
> > [4]+  Stopped                    ping google.com
>
> What does " /usr/bin/qmicli -d /dev/cdc-wdm0
> --wds-get-packet-service-status" say in that case?
>
> The only thing I can think of is that you may have auto-connect
> enabled in the device and it just gets re-connected itself (or never
> disconnected?). You can try to verify that by just ifup-ing the wwan
> interface and trying to call the dhcp client directly on that
> interface; without having qmicli/qmi-network in advance.
>
> --
> Aleksander
> https://aleksander.es
>
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