From 78c896b3b3127515478090c19447e27dc406427e Mon Sep 17 00:00:00 2001
From: Jianfeng Tan <henry.tjf@antfin.com>
Date: Mon, 18 Nov 2019 06:59:50 +0000
Subject: TLDKv2

Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Signed-off-by: Jielong Zhou <jielong.zjl@antfin.com>
Signed-off-by: Jian Zhang <wuzai.zj@antfin.com>
Signed-off-by: Chen Zhao <winters.zc@antfin.com>
Change-Id: I55c39de4c6cd30f991f35631eb507f770230f08e
---
 .../mss/mss-getsockopt-tcp_maxseg-server-ts.pkt      | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-server-ts.pkt

(limited to 'test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-server-ts.pkt')

diff --git a/test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-server-ts.pkt b/test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-server-ts.pkt
new file mode 100644
index 0000000..5d28c93
--- /dev/null
+++ b/test/packetdrill/tests/linux/mss/mss-getsockopt-tcp_maxseg-server-ts.pkt
@@ -0,0 +1,20 @@
+// Test that getsockopt of TCP_MAXSEG works on passive/server TCP connections.
+// In this variant we test that a simple query of segment size works,
+// in the case where TCP timestamps reduce the usable payload space.
+
+// Set up a listening socket.
+0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0.000 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0.000 bind(3, ..., ...) = 0
+0.000 listen(3, 1) = 0
+
+// Establish a connection
+0.100 < S 0:0(0) win 32792 <mss 1100,sackOK,TS val 100 ecr 0,nop,wscale 7>
+0.100 > S. 0:0(0) ack 1 <mss 1460,sackOK,TS val 100 ecr 100,nop,wscale 6>
+0.200 < . 1:1(0) ack 1 win 257 <nop,nop,TS val 200 ecr 100>
+
+0.300 accept(3, ..., ...) = 4
+
+// Verify that the kernel reduced the returned segment size
+// to account for TCP timestamps.
+0.400 getsockopt(4, SOL_TCP, TCP_MAXSEG, [1088], [4]) = 0
-- 
cgit 1.2.3-korg