From nobody Sat Sep 26 12:32:37 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E8CCF484237 for ; Mon, 14 Sep 2026 17:48:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789408099; cv=none; b=NwEuu5KdBHqTTB13eXeBkzx9c3rx80ccgtowa92F8lv1RjNwRnNjTzDdmCGmcO7dRgvI7+PP9HG698k+NvMNPEf21POoIumRR/aGh6j/4io7AlJrvm6f4DSeGZJy8wZDAogJzqjzgry2hB3mKoiRMlDT5p5eSIfJt4PF8k6aKqY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789408099; c=relaxed/simple; bh=AZMGzyvufrHCSWqCmxZbRtabT+G07PL+5bKRQRKV7bU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=Eq97/SV4lR65ADN+acBhVH2dOu79LY7BcBTS5kRr85m9i28sQUfwz1ja9ym5r3IOSJRUoP9UEE7fOwDXzQybtrvfEEY7yuN2MpoB4yTAJ9Cej1IgSaeXoAubmhVEPaIPfC5Gc5FC+SzT217YEEB2FnSEiS59nV6/nT6G4/Ffn9g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=O7EmWUOm; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="O7EmWUOm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2911D1F000FF; Mon, 14 Sep 2026 17:48:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789408097; bh=MsGsU8hIbe5aGNrb5gTk5f6+ExL9Y32IZAjFYLe+YfE=; h=From:Date:Subject:To:Cc; b=O7EmWUOmqhHpv5VdokY4ZNztcGJg5I9IowaLfUdXDa/8Xkl4dt17P1eASJNsIQO6r hQM5+jPP1gir/AjUagiZ/JSy9eJRO+9AIGbt7a1G8bbfF9z4W5zLmbaxk1Vx3IF60I HcqvEkgOjyF1lr4TGrj9gNFEWsbVCYjGIHzkekHyh7BHOYhPCm8V8wxjsaNUzTV2Sz +5qzxfipnn/KRvt0UMO9Uh+wSdi0eFK8Ki02eQ+9qMEW4VvG3yZ30cXkOnqcZ48vsQ ZvFAAcyaSEN1s9XGqS0yaQxTFC8rQx23rDhq6VyyyFQRruQ4p+uQX2pdtPmhy62536 VMh0CBSB/zn5g== From: "Matthieu Baerts (NGI0)" Date: Mon, 14 Sep 2026 19:48:09 +0200 Subject: [PATCH mptcp-next] selftests: mptcp: join: capture on client side for test 020 Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260914-mptcp-sft-join-cap-ns2-v1-1-2f48e4c5f9eb@kernel.org> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/yWM0QqDMAwAf0XyvECtUnC/MvYQu7hFWCxNNwTx3 +3m43HcbWCchQ2uzQaZv2KyaIX20kB8kT4Z5VEZvPPBDW2P71RiQpsKzosoRkqo5pHCSP0QHJP voMYp8yTrf3yDs1FeC9xPZ59x5lh+Z9j3A9wmf/iGAAAA X-Change-ID: 20260914-mptcp-sft-join-cap-ns2-a6ba4960ea23 To: MPTCP Linux Cc: "Matthieu Baerts (NGI0)" X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1553; i=matttbe@kernel.org; h=from:subject:message-id; bh=AZMGzyvufrHCSWqCmxZbRtabT+G07PL+5bKRQRKV7bU=; b=kA0DAAoWfCLwwvNHCpcByyZiAGqoM2Cjb2lc/SytOewGVZlxi8doVicObNvn8pfPADg/NCaH3 oh1BAAWCgAdFiEEG4ZZb5nneg10Sk44fCLwwvNHCpcFAmqoM2AACgkQfCLwwvNHCpegeQD/S2ON 6z0g2JdNRHugXvjYJMvaCYjwWh+Z4xdH9w9dJMcBAPs0Lf7LNy9eud3M4FXhyltu7HJjZGGlwku BlzKSnWAP X-Developer-Key: i=matttbe@kernel.org; a=openpgp; fpr=E8CB85F76877057A6E27F77AF6B7824F4269A073 The test "signal address, TCP-only listener on client" is a bit particular: a TCP-only listening socket is created on the client side, and the kernel will try to connect to this local IP. To be able to understand what's going on in case of issues, it is helpful to have a capture on the client side as well for this particular test. This avoids some confusions. Note that the 2nd tcpdump process will have its standard output redirected to the same file after having truncated it. That's fine for this test, this output file is not very important, no need to have an exception there. Signed-off-by: Matthieu Baerts (NGI0) --- tools/testing/selftests/net/mptcp/mptcp_join.sh | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testin= g/selftests/net/mptcp/mptcp_join.sh index b16e24418e73..690188b01a29 100755 --- a/tools/testing/selftests/net/mptcp/mptcp_join.sh +++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh @@ -2413,7 +2413,10 @@ signal_address_tests() extra_bind=3D$! mptcp_lib_wait_local_port_listen "$ns2" "$port" =20 + # there will be traffic on the client side only: MPJ to loopback + cond_start_capture ${ns2} run_tests $ns1 $ns2 10.0.1.1 + cond_stop_capture join_synack_no_mpjoin=3D1 join_syn_tx=3D1 \ chk_join_nr 0 0 0 =20 --- base-commit: 060af37701a3aca2c02cb5e874d740be6acbf1a2 change-id: 20260914-mptcp-sft-join-cap-ns2-a6ba4960ea23 Best regards, -- =20 Matthieu Baerts (NGI0)