Re: Getting a stable MAC address for a RPI CM3+ with ue0 interface

Hi all,

some more research ...

> Am 20.09.2023 um 21:05 schrieb Patrick M. Hausen <pmh@hausen.com>:
> No worky.
> [...]


I could not find any code in the network startup routines in userland that
would generate and configure a random MAC address. So I looked for
the driver.

Apparently the TuringPi uses smsc(4), and there we have it straight from
the driver source:

-------------------
static void
smsc_attach_post(struct usb_ether *ue)
{
[...]
 /* Attempt to get the mac address, if an EEPROM is not attached this
* will just return FF:FF:FF:FF:FF:FF, so in such cases we invent a MAC
* address based on urandom.
*/
[...]
 /* Initialise the chip for the first time */
smsc_chip_init(sc);
}
-------------------

So what we would really need is a tunable - one per driver or possibly a
common one read and acted upon by all of the USB ethernet drivers ...

With no code on our side to perform anything, no wonder the RPI
config files have no effect.

Dang. That's frustrating. With aarch64 having been promoted to "tier 1"
I really expected full support for all RPI platforms and related features
and hardware.

Or am I misreading that? I though that the Pi was *the* aarch64 platform,
at least in numbers ...

Kind regards,
Patrick