>Should this really be a separate program? Shouldn't it just be the
>case that if you ping a v6 address you get v6 ping, and that if there
>is an ambiguity you resolve it with a command line flag? Two programs
>doing just about the same thing seem unnecessary...

	It depends...
	Amount of code that can be shared is small (due to differences between
	icmp and icmp6), and you will end up specifying "ping -6" or "ping -4"
	all the time.  I think it makes sense to make them separate.
	Also, as KAME tries to avoid adding unstability into IPv4 part of
	base system, we decided to make them separate.

	Just keep it here (it makes no harm) and wait for someone dare to merge.
	(I'll be committing traceroute6 soon :-))

itojun