[OpenWrt-Devel] [ModemManager] How can I make ModemManager work right?

[Jeonghum Joh]

Hello Alberto,

Thank you for letting me know the url of ModemManager mailing list.
I posted this question there too.

Thank you.
Jeonghum

2020년 4월 29일 (수) 오후 3:50, Alberto Bursi <bobafetthotmail at gmail.com>님이 작성:

>
>
> On 29/04/20 08:29, Jeonghum Joh wrote:
> > Hello,
> > Thanks to many people in this list, I was able to find ModemManager and
> > I've tried applying it.
> >
> > ==== Testing environment ====
> >
> > Target Model        : MediaTek MT7622 AC4300rfb1 board
> > Firmware Version : LEDE Reboot 17.01-SNAPSHOT unknown / LuCI
> > Kernel Version      : 4.4.124
> > Modem                 : HUCOM HM-900
> > ModemManager
> > Version                 : 1.12.8
> > menuconfig          : (QMI on, MBIM off)
> > git clone URL        :
> > https://github.com/openwrt/packages/tree/master/net/modemmanager
> >
> > Noted Device Files : Those files and paths are noted/watched
> > qmichannel                                            : /dev/cdc-wdm0
> > usbnet_adapter                                      :
> /sys/class/net/wwan0
> > /sys/bus/usb/devices/2-1/manufacturer : QCOM
> > /sys/bus/usb/devices/2-1/idVendor        :05C6
> > /sys/bus/usb/devices/2-1/idProduct       :90db
> > /sys/bus/usb/devices/2-1/speed             :5000
> > /sys/bus/usb/devices/2-1/product          :SDXPRAIRIE-MTP _SN:B02CE51B
> > /sys/bus/usb/devices/2-1/version           :3.20
> > /sys/bus/usb/devices/2-1:1.2/net/wwan0
> > /sys/bus/usb/devices/2-1:1.2/net/wwan0/device/driver
> > /sys/bus/usb/devices/2-1:1.2/net/wwan0/device
> > /sys/bus/usb/devices/2-1:1.2/usbmisc/cdc-wdm0
> > /sys/devices/platform/1a0c0000.usb/usb2/2-1/2-1:1.2
> >
> > Kernel modules watched via lsmod
> > cdc_wdm                 8821  1 qmi_wwan
> > qmi_wwan                6252  0
> > usbcore               153512 20
> >
> option,usb_wwan,qmi_wwan,cdc_ncm,cdc_ether,usbserial,usbnet,usblp,cdc_wdm,cdc_acm,usb_storage,xhci_mtk,xhci_plat_hcd,xhci_pci,xhci_hcd,uhci_hcd,ohci_platform,ohci_hcd,ehci_platform,ehci_hcd
> > usbnet                 19027  3 qmi_wwan,cdc_ncm,cdc_ether
> >
> > Above is original environment.
> > On this circumstances, I disabled CM provided from modem provider :
> hucom-cm
> > And I added one configuration section into the bottom of
> > /etc/config/network :
> > config interface 'broadband'
> >          option device
> '/sys/devices/platform/1a0c0000.usb/usb2/2-1/2-1:1.2'
> >          option proto 'modemmanager'
> >          option apn '5g-internet.sktelecom.com
> > <http://5g-internet.sktelecom.com>'
> >          option username ''
> >          option password ''
> >          option pincode ''
> >          option lowpower '1'
> >
> > Under these settings, I confirmed that
> > - hucom-cm is disabled
> > - ModemManager is alive
> >   4430 root      229m D    /usr/sbin/ModemManager
> >
> > The wwan0 is not shown from ifconfig and ping 8.8.8.8 fails saying
> > Network is unreachable.
> > So, My first trying to utilize MM seemed to be failed.
> >
> > Originally hucom-cm sets bridge mode like shown below:
> > BRIDGE_MODE_FILE : /sys/module/qmi_wwan/parameters/bridge_mode
> > BRIDGE_IPV4_FILE    : /sys/module/qmi_wwan/parameters/bridge_ipv4
> > But under ModemManager these files are not shown.
> >
> > And I've found many plugin libraries under /usr/lib/ModemManager:
> > libmm-plugin-altair-lte.so     libmm-plugin-mtk.so
> >   libmm-plugin-thuraya.so
> >
> > Could someone help me?
> >
> > Do I need to look deeper into ModemManager?
> > Do I need to implement new plugin library for our product?
> > Or do I need to forget about ModemManager?
> >
> > My already given hucom-cm anyway works. It brings data via wwan0 and
> > establish network interface wwan0.
> > Problem is that hucom-cm sets up firewall rules and routing settings
> > redundantly and unnecessarily. So I can make it not to do these unneeded
> > settings. This way would be good approach I believe.
> > But we'd like to make our product indepecntant from specific modem. I
> > guessed that opensource ModemManager infrastructure would give us some
> > sort of independence from specific modem and in other words it would
> > give some abstraction..
> >
> > I am not sure of anything. Could someone give me some light so that I
> > can find the best way to go?
> >
> > Additional question : If I write our own logic as a plugin library of
> > ModemManager, wouldn't it necessarily have to stick to GPL? Can we apply
> > commercial license for the plugin?
> >
> > Thank you very much in advance.
> > Jeonghum
>
> If none answers better in this mailing list, development and licensing
> questions about ModemManager should probably be asked in its own mailing
> list https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
>
> As it is not a package developed by OpenWrt, it is used by desktop Linux
> distributions too (Ubuntu, RHEL, SUSE and most others), Openwrt only
> provides the package and integrates its config with uci.
>
> -Alberto
>
> _______________________________________________
> openwrt-devel mailing list
> openwrt-devel at lists.openwrt.org
> https://lists.openwrt.org/mailman/listinfo/openwrt-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.infradead.org/pipermail/openwrt-devel/attachments/20200429/ece5d725/attachment.htm>
-------------- next part --------------
_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/mailman/listinfo/openwrt-devel