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4375ac61a0
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 3985e8a361]
Bug: 19470192
Bug: 21832279
Bug: 22464419
Change-Id: Ib74ef945dcabe64215064f15ee1660b6524d65ce
(cherry picked from commit 0633924e7776754ccb473d649e5fa9ee45617a46)