selftests/net: packetdrill: improve tcp_rcv_neg_window.pkt

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The test depends on accepting a packet that is larger than the
advertised window and that does not trigger an immediate ACK.

Previously, the test might still pass even if kernel behavior changed
unexpectedly. Add assertions verifying that the large packet was
accepted and no ACK was sent.

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Simon Baatz <gmbnomis@gmail.com>
Link: https://patch.msgid.link/20260316-improve_tcp_neg_usable_wnd_test-v1-1-f16d5e365107@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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Simon Baatz 2026-03-16 19:51:10 +01:00 • committed by Paolo Abeni

parent a7fb05cbb8

commit 96a584db75

1 changed files with 11 additions and 3 deletions

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tools/testing/selftests/net/packetdrill/tcp_rcv_neg_window.pkt

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