netdev - [PATCH v1 net-next 04/12] selftest: packetdrill: Add test for TFO_SERVER_WO

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Message-ID: <20250926212929.1469257-5-kuniyu@google.com>
Date: Fri, 26 Sep 2025 21:28:58 +0000
From: Kuniyuki Iwashima <kuniyu@...gle.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: Simon Horman <horms@...nel.org>, Kuniyuki Iwashima <kuniyu@...gle.com>, 
	Kuniyuki Iwashima <kuni1840@...il.com>, netdev@...r.kernel.org
Subject: [PATCH v1 net-next 04/12] selftest: packetdrill: Add test for TFO_SERVER_WO_SOCKOPT1.

TFO_SERVER_WO_SOCKOPT1 is no longer enabled by default, and
each server test requires setsockopt(TCP_FASTOPEN).

Let's add a basic test for TFO_SERVER_WO_SOCKOPT1.

Signed-off-by: Kuniyuki Iwashima <kuniyu@...gle.com>
---
 ...cp_fastopen_server_basic-no-setsockopt.pkt | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-no-setsockopt.pkt

diff --git a/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-no-setsockopt.pkt b/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-no-setsockopt.pkt
new file mode 100644
index 000000000000..649997a58099
--- /dev/null
+++ b/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-no-setsockopt.pkt
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Basic TFO server test
+//
+// Test TFO_SERVER_WO_SOCKOPT1 without setsockopt(TCP_FASTOPEN)
+
+`./defaults.sh
+ ./set_sysctls.py /proc/sys/net/ipv4/tcp_fastopen=0x402`
+
+    0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3
+   +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+   +0 bind(3, ..., ...) = 0
+   +0 listen(3, 1) = 0
+
+   +0 < S 0:10(10) win 32792 <mss 1460,sackOK,nop,nop,FO TFO_COOKIE,nop,nop>
+   +0 > S. 0:0(0) ack 11 <mss 1460,nop,nop,sackOK>
+
+   +0 accept(3, ..., ...) = 4
+   +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) != 0, tcpi_options }%
+
+   +0 read(4, ..., 512) = 10
-- 
2.51.0.536.g15c5d4f767-goog