net: Do not route unicast IP packets twice

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Packets marked with 'offload_l3_fwd_mark' were already forwarded by a
capable device and should not be forwarded again by the kernel.
Therefore, have the kernel consume them.

The check is performed in ip{,6}_forward_finish() in order to allow the
kernel to process such packets in ip{,6}_forward() and generate required
exceptions. For example, ICMP redirects.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Ido Schimmel 2018-12-04 08:15:11 +00:00 • committed by David S. Miller

parent 875e893995

commit f839a6c925

2 changed files with 14 additions and 0 deletions

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7

net/ipv4/ip_forward.c

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7

net/ipv6/ip6_output.c

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