M7354 IPv6 Problem

[Dan Williams]

On Thu, 2015-09-24 at 18:01 +0200, Aleksander Morgado wrote:
> Hey,
> 
> Have you checked this libqmi thread?
> http://lists.freedesktop.org/archives/libqmi-devel/2014-December/001036.html
> 
> There are some good comments there from Bjørn regarding default
> profiles and the ipv4-or-ipv6 context.

To summarize what Bjorn says, most WWAN modem firmware does *not*
support DHCPv6.  They typically support either static IP configuration
(via values reported from firmware) or IPv6 SLAAC (eg, router
advertisements).  Unfortunately some devices don't pass DNS information
in the RAs, so your only recourse here is to use the static information
or hardcode the DNS servers.

You must also ensure that the context/profile is IPv6 capable, which
ModemManager currently doesn't do (but really, really should).
Otherwise the modem may crash (observed with MC7750 and UML290 at least,
maybe others).

Dan

> Also, see some clarifications below about how to use qmicli along with
> ModemManager, unrelated to your issue.
> 
> >
> > root at router:/home# mmcli -L
> >
> > Found 1 modems:
> >     /org/freedesktop/ModemManager1/Modem/0 [Sierra Wireless, Incorporated]
> > MC7354
> >
> > root at router:/home# mmcli -m 0
> >
> > /org/freedesktop/ModemManager1/Modem/0 (device id
> > '08fd8263ec2eb5f680a533bdcded55eef628d7bb')
> >   -------------------------
> >   Hardware |   manufacturer: 'Sierra Wireless, Incorporated'
> >            |          model: 'MC7354'
> >            |       revision: 'SWI9X15C_05.05.16.03 r22385 carmd-fwbuild1
> > 2014/06/04 15:01:26'
> >            |      supported: 'gsm-umts
> >            |                  cdma-evdo
> >            |                  lte
> >            |                  cdma-evdo, gsm-umts
> >            |                  gsm-umts, lte
> >            |                  cdma-evdo, lte
> >            |                  cdma-evdo, gsm-umts, lte'
> >            |        current: 'lte'
> >            |   equipment id: '359225052167129'
> >   -------------------------
> >   System   |         device: '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1'
> >            |        drivers: 'qmi_wwan, option1'
> >            |         plugin: 'Generic'
> >            |   primary port: 'cdc-wdm2'
> >            |          ports: 'ttyUSB0 (qcdm), ttyUSB2 (at), wwan0 (net),
> > wwan1 (net), cdc-wdm2 (qmi), cdc-wdm1 (qmi)'
> >   -------------------------
> >   Numbers  |           own : '2019196694'
> >   -------------------------
> >   Status   |           lock: 'sim-pin2'
> >            | unlock retries: 'sim-pin (3), sim-pin2 (3), sim-puk (10),
> > sim-puk2 (10)'
> >            |          state: 'disabled'
> >            |    power state: 'on'
> >            |    access tech: 'unknown'
> >            | signal quality: '0' (cached)
> >   -------------------------
> >   Modes    |      supported: 'allowed: 4g; preferred: none'
> >            |        current: 'allowed: 4g; preferred: none'
> >   -------------------------
> >   Bands    |      supported: 'cdma-bc0-cellular-800, cdma-bc1-pcs-1900,
> > cdma-bc10-secondary-800, cdma-bc15-aws, dcs, egsm, pcs, g850, u2100, u1900,
> > u17iv, u850, u900, eutran-ii, eutran-iv, eutran-v, eutran-xiii, eutran-xvii,
> > eutran-xxv'
> >            |        current: 'cdma-bc0-cellular-800, cdma-bc1-pcs-1900,
> > cdma-bc15-aws, dcs, egsm, pcs, g850, u2100, u1900, u850, u900, eutran-iv,
> > eutran-xiii'
> >   -------------------------
> >   IP       |      supported: 'ipv4, ipv6, ipv4v6'
> >   -------------------------
> >   3GPP     |           imei: '359225052167129'
> >            |  enabled locks: 'none'
> >            |    operator id: 'unknown'
> >            |  operator name: 'unknown'
> >            |   registration: 'unknown'
> >   -------------------------
> >   SIM      |           path: '/org/freedesktop/ModemManager1/SIM/0'
> >
> >
> > root at router:/home# qmicli -d /dev/cdc-wdm2 --wds-get-profile-list=3gpp
> > [24 Sep 2015, 11:09:46] -Warning ** Error reading from istream: Resource
> > temporarily unavailable
> > ^Ccancelling the operation...
> >
> > error: couldn't create client for the 'wds' service: CID allocation failed
> > in the CTL client: Transaction aborted
> 
> You shouldn't try to run any QMI command directly in the same
> /dev/cdc-wdm port which is using ModemManager (see "primary port"
> reported above). If you do want to do that, you'll need to add the
> extra "--device-open-proxy" option to your qmicli command (or shorter,
> "-p"). See https://sigquit.wordpress.com/2013/09/13/sharing-a-qmi-port-between-processes/
> 
> > root at router:/home/m2m# qmicli -d /dev/cdc-wdm1 --wds-get-profile-list=3gpp
> > Profile list retrieved:
> >     [1] 3gpp - profile1
> >         APN: 'INTERNET'
> >         PDP type: 'ipv4-or-ipv6'
> >         Auth: 'none'
> >     [2] 3gpp - profile2
> >         APN: 'admin'
> >         PDP type: 'ipv4-or-ipv6'
> >         Auth: 'none'
> >     [3] 3gpp - profile3
> >         APN: 'INTERNET'
> >         PDP type: 'ipv4-or-ipv6'
> >         Auth: 'none'
> >     [4] 3gpp - profile4
> >         APN: 'app'
> >         PDP type: 'ipv4-or-ipv6'
> >         Auth: 'none'
> >     [5] 3gpp - profile5
> >         APN: '800'
> >         PDP type: 'ipv4-or-ipv6'
> >         Auth: 'none'
> >     [9] 3gpp - profile9
> >         APN: 'ims'
> >         PDP type: 'ipv6'
> >         Auth: 'none'
> >     [10] 3gpp - profile10
> >         APN: 'admin'
> >         PDP type: 'ipv4'
> >         Auth: 'none'
> >     [11] 3gpp - profile11
> >         APN: 'INTERNET'
> >         PDP type: 'ipv4'
> >         Auth: 'none'
> >     [12] 3gpp - profile12
> >         APN: 'app'
> >         PDP type: 'ipv4-or-ipv6'
> >         Auth: 'none'
> >     [13] 3gpp - profile13
> >         PDP type: 'ipv4'
> >         Auth: 'none'
> 
> In this case it worked without the "--device-open-proxy" option
> because /dev/cdc-wdm1 wasn't being used by ModemManager.
>