neighbor discovery protocol basics, just for fun and for radv slaac
this is a working version, but code is not perfect,
just commit to save the checkpoint -- this isn't the master, is it?
now reproduced also in UDP, not only ICMP
This patch also allows for a better ISO/OSI layer separation between
IPv6 and upper layers, and upper layers can use the same common
interface
actually only one packet is managed at a time,
then a packetin+packetout buffer area has been created for IPv6 packets.
Upper layers can then access this data by means of pointer,
avoiding further allocations on the stack.
Obviously, packetin is read-only (eg. upper layers can only read it)
giomba