unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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ipv6: do not create neighbor entries for local delivery

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They will be created at output, if ever needed. This avoids creating
empty neighbor entries when TPROXYing/Forwarding packets for addresses
that are not even directly reachable.

Note that IPv4 already handles it this way. No neighbor entries are
created for local input.

Tested by myself and customer.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcelo Ricardo Leitner 2013-01-29 22:26:08 +00:00 committed by David S. Miller
parent 70c37bf97f
commit bd30e94720
1 changed files with 1 additions and 1 deletions
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2
net/ipv6/route.c
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@ -928,7 +928,7 @@ static struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
dst_hold(&rt->dst);
read_unlock_bh(&table->tb6_lock);
if (!rt->n && !(rt->rt6i_flags & RTF_NONEXTHOP))
if (!rt->n && !(rt->rt6i_flags & (RTF_NONEXTHOP | RTF_LOCAL)))
nrt = rt6_alloc_cow(rt, &fl6->daddr, &fl6->saddr);
else if (!(rt->dst.flags & DST_HOST))
nrt = rt6_alloc_clone(rt, &fl6->daddr);