drop packet if it looks to be truncated/length field is bogus. be sure to dummy read the packet if memory allocation is failed.
drop packet if it looks to be truncated/length field is bogus.
be sure to dummy read the packet if memory allocation is failed.

XXX more sanity check

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame