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ext.git/commit/fs?h=packet-loop-back&id=4e28e05aac78dca759c4b2b374ec99306f7ae8ae'>4e28e05aac78dca759c4b2b374ec99306f7ae8ae (patch) treed13b7d82d6263784654faeaf60882e68460d5797 /fs parent93d8be41c619ea6d4b29a1cefd15b60d2d82e764 (diff)
net: packet: Introduce PACKET_XMIT_RECEIVE socket optionpacket-loop-back
The PACKET_XMIT_RECEIVE socket options allows to immediately pump packets sent through PF_PACKET back into the network stack via dev_forward_skb() instead of submitting them to the device driver using dev_queue_xmit(). This feature might be useful to load the network stack with a lot of packets, similar to pktgen. Enable the setting using: int one = 1; setsockopt(fd, SOL_PACKET, PACKET_XMIT_RECEIVE, &one, sizeof(one)); By default, PACKET_XMIT_RECEIVE is disabled and needs to be explicitly enabled on PF_PACKET sockets. Joint work with Daniel Borkmann. Suggested-by: Daniel Borkmann <daniel@iogearbox.net> Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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