ublox with ipv6

[Aleksander Morgado]

Hey Thomas!

> I am not sure, if I asked it already. ModemManager gets all information about
> IPv6, but it ignores them.
>
> I made a successful IPv6 (dual stack) test with a combination of
> NetworkManager/ModemManager and some manual commands.
>
> I used version 1.14.8. (the latest in tumbleweed)
> I haven't compiled the master version.
>
> I attached the full mm debug log. But in reality only these line were
> interesting:
>
> ModemManager[3506]: <debug> [1623177383.777935] [modem0/ttyACM1/at] device
> open count is 2 (close)
> ModemManager[3506]: <debug> [1623177383.778026] [modem0/ttyACM1/at] <--
> '<CR><LF>+CGEV: ME PDN ACT 5<CR><LF>'
> ModemManager[3506]: <info>  [1623177383.778131] [modem0] mobile equipment
> request to activate context (cid 5)
> ModemManager[3506]: <debug> [1623177383.778221] [modem0/ttyACM1/at] -->
> 'AT+UIPADDR=5<CR>'
> ModemManager[3506]: <debug> [1623177384.037245] [modem0/ttyACM1/at] <--
> '<CR><LF>+UIPADDR:
> 5,"usb0:4","10.212.96.155","255.255.255.0","",""<CR><LF><CR><LF
> >OK<CR><LF>'
> ModemManager[3506]: <debug> [1623177384.037492] [modem0/bearer0] (u-blox) IPv4
> gateway address retrieved: 10.212.96.155
> ModemManager[3506]: <debug> [1623177384.037537] [modem0/bearer0] (u-blox)
> gathering IP and DNS information for PDP context #5...
> ModemManager[3506]: <debug> [1623177384.037594] [modem0/ttyACM1/at] device
> open count is 3 (open)
> ModemManager[3506]: <debug> [1623177384.037657] [modem0/ttyACM1/at] device
> open count is 2 (close)
> ModemManager[3506]: <debug> [1623177384.037727] [modem0/ttyACM1/at] -->
> 'AT+CGCONTRDP=5<CR>'
> ModemManager[3506]: <debug> [1623177384.052348] [modem0/ttyACM1/at] <--
> '<CR><LF>+CGCONTRDP: 5,6,"internet.telekom.MNC001.MCC262.GPRS","'
> ModemManager[3506]: <debug> [1623177384.053180] [modem0/ttyACM1/at] <--
> '10.212.96.100.255.255.255.255","10.212.96.100","10.74.210.210","10.74.210.211","0.0.0.0","0.0.0.0",
> 0<CR><LF>'
> ModemManager[3506]: <debug> [1623177384.053371] [modem0/ttyACM1/at] <--
> '+CGCONTRDP: 5,6,"internet.telekom.MNC001.MCC262.GPRS","'
> ModemManager[3506]: <debug> [1623177384.054811] [modem0/ttyACM1/at] <--
> '42.1.5.152.185.1.249.22.0.1.0.1.106.104.189.236.255.255.255.255.255.255.255.255.255.255.255.255.255.255.255.255","42.1.5.152.185.1.249.22.0.1.0.1.106.104.189.236","42.1.5.152.7.255.0.0.0.16.0.116.2.16.2.16","42.1.5.152.7.255.0.0.0.16.0.116.2.16.2.17","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",
> 0<CR><LF>'
> ModemManager[3506]: <debug> [1623177384.055091] [modem0/ttyACM1/at] <--
> '<CR><LF>OK<CR><LF>'
> ModemManager[3506]: <debug> [1623177384.055319] [modem0/bearer0] (u-blox) IPv4
> address retrieved: 10.212.96.100
> ModemManager[3506]: <debug> [1623177384.055415] [modem0/bearer0] (u-blox) IPv4
> subnet retrieved: 255.255.255.255
> ModemManager[3506]: <debug> [1623177384.055468] [modem0/bearer0] (u-blox)
> primary DNS retrieved: 10.74.210.210
> ModemManager[3506]: <debug> [1623177384.055509] [modem0/bearer0] (u-blox)
> secondary DNS retrieved: 10.74.210.211
> ModemManager[3506]: <debug> [1623177384.055552] [modem0/bearer0] (u-blox)
> finished IP settings retrieval for PDP context #5...
> ModemManager[3506]: <debug> [1623177384.055618] [modem0/wwp0s20u1/net] port
> now connected
> ModemManager[3506]: <debug> [1623177384.055663] [modem0/bearer0] connected
> ModemManager[3506]: <info>  [1623177384.055883] [modem0] state changed
> (connecting -> connected)
>
> The gateway settings are a little bit strange, but it works.
>
> "The default route should be created toward a fake
> IPV6 address on the same network in order to forward the internet traffic on the
> USB link."
>
> So IP address, gateway and DNS-resolvers worked.
> MTU is Ok. Speedtests were Ok too.
>

So this just needs proper implementation in the u-blox plugin then.
I've opened the following gitlab issue to track it:
https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/388

-- 
Aleksander
https://aleksander.es