Feature request: DHCPv6 - use real MAC address from dhcp6 request (mac-sources=raw)

This is a request to implement

"mac-sources": [ "raw" ]

within DHCPv6 configuration.

As the documentation suggests, in principle DHCPv6 server could extract MAC/hardware address information from raw sockets. 🙏 Please do so.

Neither Kea nor ISC DHCP nor any DHCPv6 server known to me can do this.

Is your feature request related to a problem? Please describe. Yes. Deployment of IPv6 itself. It's no-go without reliable MAC-address-based DHCP in a large scale networks. All the other methods (ipv6-link-local, client-link-addr-option, etc) aren't reliable. And unfortunately the whole concept of DUIDs is wrong.

Describe the solution you'd like

We simply need the reservation configuration like this

  {
   "hw-address": "00:01:02:03:04:05",
   "ip-addresses": [ "2001:db8:1::101", "2001:db8:1::102" ]
  },

to work reliably.

Describe alternatives you've considered

• rely on client-link-addr-option (option 79) ... many clients provide wrong MAC address here (for example of their other interface)
• try manage to acquire DUID of all current and future client hardware pieces ... too complicated (DUID not printed on stickers; many don't even show it on web interface; some randomly change it on firmware upgrade; dual-boot PCs have more than one)

Funding its development ... no

Participating in development ... I am willing to participate in the feature development. I'm a seasoned developer, new to Kea though. With some basic steering, I'd be able to help.

Contacting you ... E-mail in my profile.