svn commit: r253590 - in head/sys: kern net sys

[Bruce Simpson]

On 24/07/13 05:24, Marcel Moolenaar wrote:
> Log:
>    Decouple the UUID generator from network interfaces by having MAC
>    addresses added to the UUID generator using uuid_ether_add(). The
>    UUID generator keeps an arbitrary number of MAC addresses, under
>    the assumption that they are rarely removed (= uuid_ether_del()).
>    This achieves the following:
>    1.  It brings up closer to having the network stack as a loadable
>        module.
>    2.  It allows the UUID generator to filter MAC addresses for best
>        results (= highest chance of uniqeness).
>    3.  MAC addresses can come from anywhere, irrespactive of whether
>        it's used for an interface or not.

I like this change, because it's interface agnostic. The fallback 
behaviour in uuidgen (of choosing the first Ethernet interface) isn't 
desirable in many situations.

Also I like the line of thinking in point 1. In some embedded and niche 
environments, not having any IP4/6 at all is quite desirable (kernel 
size, security).