netfilter: ipv6: Preserve link scope traffic original oif
When ip6_route_me_harder is invoked, it resets outgoing interface of: - link-local scoped packets sent by neighbor discovery - multicast packets sent by MLD host - multicast packets send by MLD proxy daemon that sets outgoing interface through IPV6_PKTINFO ipi6_ifindex Link-local and multicast packets must keep their original oif after ip6_route_me_harder is called. Signed-off-by: Alin Nastac <alin.nastac@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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