>I am unable to receive ICMPv6 messages with type 1,2 & 4. I have made a
>client which sends ICMPv6 messages with these types, but my server
>program doesn't detect them. I'm making an IPv6/IPv4 relay, and would
>like to receive all ICMP messages into userspace. Is there an elegant
>way to get the kernel to hand these type of messages to a userlevel
>program?

	RFC2292 talks about how to manipulate ICMPv6 inbound and outbound
	messages via AF_INET6 (IPPROTO_ICMPV6) sockets.  source code for
	sbin/ping6, usr.sbin/rtsold and sbin/traceroute6 should be a good
	reference.

itojun