Dual stack with qmicli 1.16.2/1.20.0 and D-Link DWM-222

[Marc Andre Selig]

On Sun, Jun 10, 2018 at 11:54:57AM +0200, Reinhard Speyerer wrote:
> On Sat, Jun 09, 2018 at 09:39:47PM +0200, Marc Andre Selig wrote:
> > I am trying to get a D-Link DWM-222 USB LTE modem to work in dual
> > stack mode using qmicli; I tried versions 1.16.2 and 1.20.0.

> for dualstack to work you need a corresponding IPV4V6 entry
[...]
> and you have to use a second CID for the IPv6 commands as in Bjørn's example.

Thank you very much!  This is what I missed.

This particular modem seems to work with 802-3 as link layer protocol.

In case anybody comes looking, I am attaching a simple init script.
In /etc/network/interfaces, I just added "iface wwan0 inet dhcp" and
"iface wwan0 inet6 auto".

Thanks again!

Marc


------ cut here for /etc/init.d/network-wwan -----
#! /bin/sh
### BEGIN INIT INFO
# Provides:          network-wwan
# Required-Start:    mountkernfs $local_fs $syslog urandom
# Required-Stop: 
# Default-Start:     2 3 4 5
# Default-Stop:
# Short-Description: bring wwan interface up when device is ready
# Description:       This script brings up a wwan interface in dualstack
#                    mode with a D-Link DWM-222 LTE USB modem.
#                    It was tested with qmicli 1.20.0; it definitely does
#                    not work with qmicli 1.16.2 as provided by Debian 9.
### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/sbin:/bin:/usr/bin
LD_LIBRARY_PATH=/usr/local/lib
export LD_LIBRARY_PATH

. /lib/init/vars.sh

PIN=1234
APN=internet.t-mobile
DEV=/dev/cdc-wdm0
SERIAL=/dev/ttyUSB2
DUALSTACK=yes

do_start () {
    DEV="-d $DEV --device-open-qmi"

    i=0
    while [ ! -e /dev/cdc-wdm0 ]; do
	echo "Waited $i seconds for device initialization"
	i=$((i+1))
	sleep 1
    done

    i=0
    qmicli $DEV --dms-uim-verify-pin=PIN,$PIN
    while ! qmicli $DEV --dms-uim-get-state | grep initialization-completed; do
	echo "Waited $i seconds for network registration"
	i=$((i+1))
	sleep 1
    done
    sleep 1

    echo 'AT+CGDCONT=1,"IPV4V6","'$APN'"' >$SERIAL

    QAR="$DEV --client-no-release-cid"

    CID4=$(qmicli $QAR --wds-noop|awk -F\' '/CID/{print $2}')
    qmicli $QAR --client-cid=$CID4 --wds-set-ip-family=4
    qmicli $QAR --client-cid=$CID4 --wds-start-network=apn=$APN
    qmicli $QAR --client-cid=$CID4 --wds-get-current-settings
    echo CID4=$CID4 >/run/network-wwan.cid

    if [ "$DUALSTACK" = yes ]; then
	CID6=$(qmicli $QAR --wds-noop|awk -F\' '/CID/{print $2}')
	qmicli $QAR --client-cid=$CID6 --wds-set-ip-family=6
	qmicli $QAR --client-cid=$CID6 --wds-start-network=apn=$APN
	qmicli $QAR --client-cid=$CID6 --wds-get-current-settings
	echo CID6=$CID6 >>/run/network-wwan.cid
    fi

    ifup wwan0

}

case "$1" in
  start)
	do_start 2>&1 | tee /run/network-wwan.log &
	;;
  restart|reload|force-reload|status)
	echo "Error: argument '$1' not supported" >&2
	exit 3
	;;
  stop)
	ifdown wwan0
	. /run/network-wwan.cid
	[ "$CID4" ] && qmicli -d $DEV --device-open-qmi --client-cid=$CID4 \
	    --wds-stop-network=disable-autoconnect
	[ "$CID6" ] && qmicli -d $DEV --device-open-qmi --client-cid=$CID6 \
	    --wds-stop-network=disable-autoconnect
	mv /run/network-wwan.cid /run/network-wwan.cid~
	;;
  *)
	echo "Usage: $0 start|stop" >&2
	exit 3
	;;
esac

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