Re: Porting umb(4) from OpenBSD

[Maxime Villard <max%m00nbsd.net@localhost>]

Le 30/04/2018 à 15:26, Pierre Pronchery a écrit :
> 			Hi tech-net@,
>
> I am currently trying to port umb(4) from OpenBSD:
>
> > The umb driver provides support for USB MBIM devices.
> > MBIM devices establish connections via cellular networks such as
> > GPRS, UMTS, and LTE. They appear as a regular point-to-point network
> > interface, transporting raw IP frames.
>
> This is apparently required to access Internet with USB modems since
> 4G/LTE (at least on my own Sierra Wireless EM7345).
>
> It does not build yet (therefore also not tested) but I am getting
> there. If anyone feels like reviewing it already, it could save me some
> trouble and help getting it to work faster.
>
> This is probably also missing changes to ifconfig(8), if only to set the
> PIN code; this is the user interface that OpenBSD developers have chosen
> for this. Alternative suggestions are welcome! (sysctl...)

I don't see where sc_tx_buf is initialized, and also the m_copydata looks
highly suspicious to me.

having said that I didn't think really hard so I may be wrong