mptcp: use rightmost 64 bits in ADD_ADDR HMAC
This changes the HMAC used in the ADD_ADDR option from the leftmost 64 bits to the rightmost 64 bits as described in RFC 8684, section 3.4.1. This issue was discovered while adding support to packetdrill for the ADD_ADDR v1 option. Fixes: 3df523ab ("mptcp: Add ADD_ADDR handling") Signed-off-by: Todd Malsbary <todd.malsbary@linux.intel.com> Acked-by: Christoph Paasch <cpaasch@apple.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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