K 10
svn:author
V 2
ae
K 8
svn:date
V 27
2018-02-12T13:52:58.779470Z
K 7
svn:log
V 537
MFC r328876:
  Modify ip6_get_prevhdr() to be able use it safely.

  Instead of returning pointer to the previous header, return its offset.
  In frag6_input() use m_copyback() and determined offset to store next
  header instead of accessing to it by pointer and assuming that the memory
  is contiguous.

  In rip6_input() use offset returned by ip6_get_prevhdr() instead of
  calculating it from pointers arithmetic, because IP header can belong
  to another mbuf in the chain.

  Reported by:	Maxime Villard <max at m00nbsd dot net>

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