Hi Ingo,
sorry to disappoint you, but that won't work. First of all, if_cdce.c doesn't
do NCM encoding and second, even if it did this still wouldn't work because
it just describes how data packets are encapsulated. But to talk to an MBIM
device, you need a different set of control messages (e.g. to set the PIN,
to tell the device to connect to the network, etc.)
I'm currently working on an MBIM driver for OpenBSD, but it will take some
more time until it's ready for sending out patches.
Gerhard
On Tue, 20 Jan 2015 23:31:17 +0100 Ingo Feinerer <feine...@logic.at> wrote:
> Has anyone experiences with USB devices (e.g. UMTS modem) offering
> "Mobile Broadband Interface Model" (MBIM) interfaces?
>
> According to
> www.usb.org/developers/docs/devclass_docs/MBIM10Errata1_073013.zip MBIM
> is comparable to NCM ("The largest deviation from NCM 1.0 is that
> devices transfer raw IP packets instead of packets with 802.3 headers.")
> which is supported by cdce(4).
>
> By hardcoding vendor and device ID in sys/dev/usb/if_cdce.c I managed to
> have a modem with MBIM interface attach via cdce:
>
> cdce0 at uhub0 port 4 configuration 1 interface 0 "MediaTek Inc Product" rev
> 2.00/3.00 addr 2
> cdce0: address XX:XX:XX:XX:XX:XX
>
> ifconfig appears to work as well
>
> cdce0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
> lladdr XX:XX:XX:XX:XX:XX
> priority: 0
>
> but dhclient gets no response. /var/log/messages contains
>
> cdce0: watchdog timeout
> cdce0: usb error on tx: TIMEOUT
>
> Any ideas?
>
> Best regards,
> Ingo
>
