selftests/net: test PACKET_IGNORE_OUTGOING

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Test that setsockopt PACKET_IGNORE_OUTGOING:

 - works with valid values (0 and 1),
 - rejects values outside of that range, and

When enabled for a loopback sniffer, it only produces 1 copy of the
packet (rx) instead of two copies (tx and rx). Use sll_pkttype to check
the direction of the packet to ensure the correct packet is sniffed.

Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260728160935.4128982-6-joe@dama.to
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Joe Damato 2026-07-28 09:09:30 -07:00 • committed by Jakub Kicinski

parent f5a445d2a2

commit b75609e42b

2 changed files with 87 additions and 2 deletions

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84

tools/testing/selftests/net/psock_snd.c

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5

tools/testing/selftests/net/psock_snd.sh

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