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

[Kavula Suresh]

Hello,

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



Thanks,
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