tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2//
3// Basic TFO server test
4//
5// Test zero-payload packet w/ valid TFO cookie - a TFO socket will
6// still be created and accepted but read() will not return until a
7// later pkt with 10 byte.
8
9`./defaults.sh`
10
11 0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3
12 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
13 +0 bind(3, ..., ...) = 0
14 +0 listen(3, 1) = 0
15 +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0
16
17 +0 < S 0:0(0) win 32792 <mss 1460,sackOK,nop,nop,FO TFO_COOKIE,nop,nop>
18 +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK>
19 +0 accept(3, ..., ...) = 4
20 +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) == 0, tcpi_options }%
21
22// A TFO socket is created and is writable.
23 +0 write(4, ..., 100) = 100
24 +0 > P. 1:101(100) ack 1
25 +0...0.300 read(4, ..., 512) = 10
26 +.3 < P. 1:11(10) ack 1 win 5840