Cinterion PLS8-X, udhcp fails
Dan Williams
dcbw at redhat.com
Thu Mar 17 15:14:44 UTC 2016
On Thu, 2016-03-17 at 13:24 +0100, José wrote:
> You are right, the beacon is using /dev/ttyACM0. Launching ppp the
> connection works just fine.
>
> Still, it would be nice if ModemManager could use the usbN network
> interfaces. Would a patch to the Cinterion plugin be complicated, or
> just issue some AT commands to configure the modem to use those
> network interfaces?
As long as the usbN interface is handled by an existing kernel driver,
and exposes itself as a normal ethernet interface, it should be fairly
simple. The only complications I can think of are:
1) whether the firmware supports DHCPv4 on the interface or not and how
to detect that
2) whether the device supports IPv6 on the interface, and if so,
whether it supports Router Advertisements with/without DHCPv6 (like
Ericsson and some others) or whether it reports static IPv6 details
through the AT command interface (like some Huawei and Icera devices
do)
Dan
> I don't currently have the AT Command Set document, but I will try to
> get it.
>
> On Wed, Mar 16, 2016 at 1:12 PM, Aleksander Morgado
> <aleksander at aleksander.es> wrote:
> >
> > Hey
> >
> > On Wed, Mar 16, 2016 at 12:57 PM, José <Joseddg92 at gmail.com> wrote:
> > >
> > > I am trying to use a Cinterion PLS8-X with ModemManager. The
> > > modem is
> > > properly identified and enabled, and the connection is properly
> > > established. But when I try to use the network interfaces and get
> > > an
> > > IP from the DHCP server, it fails to get any IP address.
> > >
> > > This is the log:
> > >
> > > root at ccimx6sbc:~# ModemManager &
> > > root at ccimx6sbc:~# ModemManager[827]: <info> ModemManager
> > > (version
> > > 1.4.12) starting in system bus...
> > > ModemManager[827]: <info> Creating modem with plugin 'Cinterion'
> > > and '7' ports
> > > ModemManager[827]: <warn> Could not grab port (tty/ttyACM4):
> > > 'Cannot
> > > add port 'tty/ttyACM4', unhandled serial type'
> > > ModemManager[827]: <warn> Could not grab port (tty/ttyACM3):
> > > 'Cannot
> > > add port 'tty/ttyACM3', unhandled serial type'
> > > ModemManager[827]: <warn> Could not grab port (tty/ttyACM2):
> > > 'Cannot
> > > add port 'tty/ttyACM2', unhandled serial type'
> > > ModemManager[827]: <info> Modem for device at
> > > '/sys/devices/soc0/soc.0/2100000.aips-
> > > bus/2184200.usb/ci_hdrc.1/usb1/1-1/1-1.1'
> > > successfully created
> > > ModemManager[827]: <info> Modem: state changed (unknown ->
> > > disabled)
> > >
> > > root at ccimx6sbc:~#
> > > root at ccimx6sbc:~#
> > > root at ccimx6sbc:~# mmcli -m 0 --simple-connect=movistar.es
> > > Error parsing connect string: 'Couldn't find equal sign
> > > separator'
> > > root at ccimx6sbc:~# mmcli -m 0 --simple-connect=apn=movistar.es
> > > ModemManager[827]: <info> Simple connect started...
> > > ModemManager[827]: <info> Simple connect state (3/8): Enable
> > > ModemManager[827]: <info> Modem
> > > /org/freedesktop/ModemManager1/Modem/0: state changed (disabled
> > > ->
> > > enabling)
> > > ModemManager[827]: <info> Modem
> > > /org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state
> > > changed (unknown -> registering)
> > > ModemManager[827]: <info> Modem
> > > /org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state
> > > changed (registering -> home)
> > > ModemManager[827]: <info> Modem
> > > /org/freedesktop/ModemManager1/Modem/0: state changed (enabling
> > > ->
> > > registered)
> > > ModemManager[827]: <info> Simple connect state (4/8): Wait to
> > > get fully enabled
> > > ModemManager[827]: <info> Simple connect state (5/8): Register
> > > ModemManager[827]: <info> Simple connect state (6/8): Bearer
> > > ModemManager[827]: <info> Simple connect state (7/8): Connect
> > > ModemManager[827]: <info> Modem
> > > /org/freedesktop/ModemManager1/Modem/0: state changed (registered
> > > ->
> > > connecting)
> > > ModemManager[827]: <info> Modem
> > > /org/freedesktop/ModemManager1/Modem/0: state changed (connecting
> > > ->
> > > connected)
> > > ModemManager[827]: <info> Simple connect state (8/8): All done
> > > successfully connected the modem
> > > root at ccimx6sbc:~# mmcli -m 0
> > >
> > > /org/freedesktop/ModemManager1/Modem/0 (device id
> > > 'f19bc7567e36f9fef0e5998b5f6a9f7346785ec1')
> > > -------------------------
> > > Hardware | manufacturer: 'Cinterion'
> > > | model: 'PLS8-X'
> > > | revision: 'REVISION 03.003'
> > > | supported: 'gsm-umts, lte'
> > > | current: 'gsm-umts, lte'
> > > | equipment id: '004401081420651'
> > > -------------------------
> > > System | device:
> > > '/sys/devices/soc0/soc.0/2100000.aips-
> > > bus/2184200.usb/ci_hdrc.1/usb1/1-1/1-1.1'
> > > | drivers: 'cdc_acm, cdc_ether'
> > > | plugin: 'Cinterion'
> > > | primary port: 'ttyACM1'
> > > | ports: 'ttyACM1 (at), ttyACM0 (at), usb0
> > > (net),
> > > usb1 (net)'
> > > -------------------------
> > > Numbers | own : 'unknown'
> > > -------------------------
> > > Status | lock: 'none'
> > > | unlock retries: 'sim-pin (3), sim-pin2 (3), sim-puk
> > > (10),
> > > sim-puk2 (10), ph-net-pin (10), ph-net-puk (32), ph-fsim-pin
> > > (10),
> > > ph-fsim-puk (32)'
> > > | state: 'connected'
> > > | power state: 'on'
> > > | access tech: 'edge'
> > > | signal quality: '20' (recent)
> > > -------------------------
> > > Modes | supported: 'allowed: 2g; preferred: none
> > > | allowed: 3g; preferred: none
> > > | allowed: 2g, 3g; preferred: none
> > > | allowed: 2g, 3g, 4g; preferred:
> > > none'
> > > | current: 'allowed: any; preferred: none'
> > > -------------------------
> > > Bands | supported: 'egsm, dcs, pcs, g850, u1900, u850'
> > > | current: 'egsm, dcs, pcs, g850, u1900, u850'
> > > -------------------------
> > > IP | supported: 'ipv4, ipv6, ipv4v6'
> > > -------------------------
> > > 3GPP | imei: '004401081420651'
> > > | enabled locks: 'none'
> > > | operator id: '21407'
> > > | operator name: 'Movistar'
> > > | subscription: 'unknown'
> > > | registration: 'home'
> > > -------------------------
> > > SIM | path:
> > > '/org/freedesktop/ModemManager1/SIM/0'
> > >
> > > -------------------------
> > > Bearers | paths:
> > > '/org/freedesktop/ModemManager1/Bearer/0'
> > >
> > I bet if you run "mmcli -b 0" to show the bearer details, it will
> > tell
> > you that "PPP" should be used.
> >
> > >
> > > root at ccimx6sbc:~# mmcli -
> > > root at ccimx6sbc:~# udhcpc -i usb0
> > > udhcpc (v1.23.2) started
> > > cdc_ether 1-1.1:1.10 usb0: CDC: unexpected notification 01!
> > > Sending discover...
> > > Sending discover...
> > > ^C
> > > root at ccimx6sbc:~# udhcpc -i usb1
> > > udhcpc (v1.23.2) started
> > > cdc_ether 1-1.1:1.12 usb1: CDC: unexpected notification 01!
> > > Sending discover...
> > >
> > > Any idea why the CDC ether driver warns about that unexpected
> > > notifications, and why is the dhcp client not working?
> > The Cinterion plugin supports either:
> > * AT+PPP
> > * QMI
> >
> > The plugin doesn't currently support AT+USBX; i.e. it doesn't know
> > how
> > to start the connection in a way that the USBX interface can be
> > used.
> > Do you have the AT command reference for that device?
> >
> > --
> > Aleksander
> > https://aleksander.es
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