Establishing connections to multiple PDPs simultaneously with MBIM

[Bjørn Mork]

Dan Williams <dcbw at redhat.com> writes:

> Neal, can you try the attached patch to libmibm?
>
> ip link add link wwan0 name wwan0.1 type vlan id 1
> mbimcli -d /dev/cdc-wdm0 --connect=1:<apn>
> < assign IP and stuff to wwan0.1 >
> mbimcli -d /dev/cdc-wdm0 --query-connect-status=1
> mbimcli -d /dev/cdc-wdm0 --disconnect=1
>
> See if that works, I haven't tested it myself.  And Bjorn may show up to
> tell us we're all crazy and this isn't how it's done...


Looks mostly good to me.  I'm still missing the 'IP type' option so that
I could actually make these APNs behave differently, but the session
mapping seems to work for connect and disconnect:


bjorn at nemi:~$ mbimcli -d /dev/cdc-wdm0  --no-close --no-open=3 --connect=0:telenor.smart
[/dev/cdc-wdm0] Successfully connected

[/dev/cdc-wdm0] Connection status:
              Session ID: '0'
        Activation state: 'activated'
        Voice call state: 'none'
                 IP type: 'ipv4'
            Context type: 'internet'
           Network error: 'unknown'

[/dev/cdc-wdm0] IPv4 configuration available: 'address, gateway, dns'
     IP [0]: '10.130.121.151/24'
    Gateway: '10.130.121.1'
    DNS [0]: '193.213.112.4'
    DNS [1]: '130.67.15.198'

[/dev/cdc-wdm0] IPv6 configuration available: 'none'
[/dev/cdc-wdm0] Session not closed:
            TRID: '5'
bjorn at nemi:~$ mbimcli -d /dev/cdc-wdm0  --no-close --no-open=3 --connect=1:telenor
[/dev/cdc-wdm0] Successfully connected

[/dev/cdc-wdm0] Connection status:
              Session ID: '1'
        Activation state: 'activated'
        Voice call state: 'none'
                 IP type: 'ipv4'
            Context type: 'internet'
           Network error: 'unknown'

[/dev/cdc-wdm0] IPv4 configuration available: 'address, gateway, dns'
     IP [0]: '10.125.165.117/24'
    Gateway: '10.125.165.1'
    DNS [0]: '193.213.112.4'
    DNS [1]: '130.67.15.198'

[/dev/cdc-wdm0] IPv6 configuration available: 'none'
[/dev/cdc-wdm0] Session not closed:
            TRID: '5'



Note that I prefer to use the optional session #0 to VLAN ID 4094
mapping for consistency.  But I use a .0 name matching the MBIM session
ID:

 ip link add link wwan0 name wwan0.0 type vlan id 4094
 ip link add link wwan0 name wwan0.1 type vlan id 1
 ip link set wwan0 up
 ifconfig wwan0.0 10.130.121.151/24
 ifconfig wwan0.1 10.125.165.117/24
 ip route add 198.145.20.140 dev wwan0.0
 ip route add 72.51.34.34 dev wwan0.1
 ping 198.145.20.140
 ping 72.51.34.34


wwan0     Link encap:Ethernet  HWaddr 8e:64:d0:65:2c:e9  
          inet6 addr: fe80::8c64:d0ff:fe65:2ce9/64 Scope:Link
          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1428  Metric:1
          RX packets:78 errors:0 dropped:0 overruns:0 frame:0
          TX packets:126 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:4656 (4.5 KiB)  TX bytes:7536 (7.3 KiB)

wwan0.0   Link encap:Ethernet  HWaddr 8e:64:d0:65:2c:e9  
          inet addr:10.130.121.151  Bcast:10.130.121.255  Mask:255.255.255.0
          inet6 addr: fe80::8c64:d0ff:fe65:2ce9/64 Scope:Link
          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1428  Metric:1
          RX packets:45 errors:0 dropped:0 overruns:0 frame:0
          TX packets:80 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2616 (2.5 KiB)  TX bytes:5908 (5.7 KiB)

wwan0.1   Link encap:Ethernet  HWaddr 8e:64:d0:65:2c:e9  
          inet addr:10.125.165.117  Bcast:10.125.165.255  Mask:255.255.255.0
          inet6 addr: fe80::8c64:d0ff:fe65:2ce9/64 Scope:Link
          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1428  Metric:1
          RX packets:33 errors:0 dropped:0 overruns:0 frame:0
          TX packets:46 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2040 (1.9 KiB)  TX bytes:3392 (3.3 KiB)




Looks like something went wrong with the connection-state part of the
patch:

bjorn at nemi:~$ mbimcli -v -d /dev/cdc-wdm0  --no-close --no-open=3 --query-connection-state=1
[05 Aug 2015, 19:58:03] [Debug] opening device...
[05 Aug 2015, 19:58:04] [Debug] [/dev/cdc-wdm0] Queried max control message size: 512
[05 Aug 2015, 19:58:04] [Debug] MBIM Device at '/dev/cdc-wdm0' ready
Segmentation fault






Bjørn