>> 	sorry for vague question: are there any prior art for equal cost
>> 	multipath support (like multiple rt_gateway), specifically in terms
>> 	of modifications to routing socket messages?  if there's some code
>> 	publically available, it would be nicer.
>
>(Sorry, I don't reply for your question.:)
>Don't you mean multiple FIB support in *BSD kernel? Or you includes
>the one also?

	yes.  now I remember that I saw something in INRIA IPv6 tree...
	(but it was mainly for multicast, IIRC)

itojun