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ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY
authorJim Westfall <jwestfall@surrealistic.net>
Sun, 14 Jan 2018 12:18:51 +0000 (04:18 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 31 Jan 2018 13:03:44 +0000 (14:03 +0100)
commit42d68bf2a42381642ea5ae460c6a5d86a56213f0
tree5f279770b1a741d3b09b792d28daa0542582ff74
parentf703437099b4ec09a643ad0ae2839ca292601166
ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY

[ Upstream commit cd9ff4de0107c65d69d02253bb25d6db93c3dbc1 ]

Map all lookup neigh keys to INADDR_ANY for loopback/point-to-point devices
to avoid making an entry for every remote ip the device needs to talk to.

This used the be the old behavior but became broken in a263b3093641f
(ipv4: Make neigh lookups directly in output packet path) and later removed
in 0bb4087cbec0 (ipv4: Fix neigh lookup keying over loopback/point-to-point
devices) because it was broken.

Signed-off-by: Jim Westfall <jwestfall@surrealistic.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
include/net/arp.h
net/ipv4/arp.c