[OpenWrt-Devel] [ModemManager] How can I make ModemManager work right?
oosaprogrammer at gmail.com
Wed Apr 29 03:55:26 EDT 2020
Thank you for letting me know the url of ModemManager mailing list.
I posted this question there too.
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/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
> > usbnet 19027 3 qmi_wwan,cdc_ncm,cdc_ether
> > Above is original environment.
> > On this circumstances, I disabled CM provided from modem provider :
> > And I added one configuration section into the bottom of
> > /etc/config/network :
> > config interface 'broadband'
> > option device
> > 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 126.96.36.199 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.
> openwrt-devel mailing list
> openwrt-devel at lists.openwrt.org
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