CARP now seems to do what it's supposed to do on my NetBSD 
installations.  In other words, a backup becomes master if the master 
goes off-line.  And only the master listens on the virtual IP address.  
Still a lot of testing to do, though.  Sorry to everyone who downloaded 
the old patches just to see CARP not work.  This mod is a lot better 
than that.

There were some timer issues I fixed that took care of the "invalid 
hash" check.  The ether_input thing had me stumped for a bit, but I 
changed the call to carp_forus to be similar to the bridge_input call... 
also had to change the carp_forus function quite a bit.  After all that 
it stopped responding to requests for the virtual host when in the 
backup state (that's a good thing ;-)... the details are in the diff.

I'm fairly confident that if you apply the new patches to -current you 
will be able to configure and test/use CARP.

ftp://63.251.83.132/pub/NetBSD/patches/README
ftp://63.251.83.132/pub/NetBSD/patches/CARP-111903.diff


As for file versions, you'll notice I didn't mess with that.  I don't 
know what I'm doing there.  I mean, I know how to count and all that... 
just don't want to assume anything.

~Mike.