tree c1b299c9233852f063eee3bae2b601b00ac32329
parent edee5ca0b9c6d6fd02d68699c59788081eda3c3f
author Erik Kline <ek@google.com> 1437550705 +0900
committer Lorenzo Colitti <lorenzo@google.com> 1438145951 +0900

ipv6: sysctl to restrict candidate source addresses

Per RFC 6724, section 4, "Candidate Source Addresses":

    It is RECOMMENDED that the candidate source addresses be the set
    of unicast addresses assigned to the interface that will be used
    to send to the destination (the "outgoing" interface).

Add a sysctl to enable this behaviour.

Signed-off-by: Erik Kline <ek@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

[Simplified back-port of net-next 3985e8a3611a93bb36789f65db862e5700aab65e]

Bug: 19470192
Bug: 21832279
Bug: 22464419
Change-Id: Icd96382f814a6f3ea53f05beb98c266b1929c5a3