吉藤英明 [off-list ref] writes:

quoted

quoted

+static int addrconf_ifid_random(u8 *eui, struct net_device *dev)

+{
+       get_random_bytes(eui, 8);
+       eui[0] |= 0x02;
+       return 0;
+}
+

Since random identifier is locally assigned, drop the global bit
instead if setting it.

Yes, definitely. Thanks.  I'm considering reusing __ipv6_regen_rndid()
which already does this correctly, and also avoids some locally assigned
addresses with special meanings.

Another issue with the initial RFC is that every prefix will have a new
random ifid, which isn't necessarily what the users expect.  I wonder if
it would be acceptable to abuse the rndid field for storing a "permanent"
random ifid?


Bjørn