Re: [GXemul-devel] MAC address for emulated hosts

[Jan-Benedict G. <jb...@lu...>]

Hi!

On Sat, 2023-03-25 20:39:37 +0100, Jan-Benedict Glaw <jb...@lu...> wrote:
> I just tried to find a way to configure specific MAC addresses for an
> emulated machine. Couldn't find something in the docs and a quick look
> at the sources seems to indicate that, for all emulated NICs,
> net_generate_unique_mac() is called to calculate a MAC address. It
> seems that for two "VMs" run as separate processes, the same MAC would
> be used?
[...]
>   @Anders: Do you already have private patches to allow for
> configurable MAC addresses? Or maybe I'd cook up something?

I had a closer look. One quite simple way to have configurable MAC
addresses could be to add a command line option (as well as a "mac()"
option in the config file) to supply a list of comma-separated MAC
addresses to be stored in struct machine.

  A helper function could be used to to parse that string and return
(if available) the n'th MAC address (or an error.) This could be
called by net_generate_unique_mac() to either pick a configured MAC
address or place one (as before.)

@Anders: Would you accept a patch like that? Or have a different idea
for supplying / parsing MAC addresses?

MfG, JBG

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