1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# Send packets with transmit timestamps over loopback with netem
5# Verify that timestamps correspond to netem delay
6
7set -e
8
9setup() {
10	# set 1ms delay on lo egress
11	tc qdisc add dev lo root netem delay 10ms
12
13	# set 2ms delay on ifb0 egress
14	modprobe ifb
15	ip link add ifb_netem0 type ifb
16	ip link set dev ifb_netem0 up
17	tc qdisc add dev ifb_netem0 root netem delay 20ms
18
19	# redirect lo ingress through ifb0 egress
20	tc qdisc add dev lo handle ffff: ingress
21	tc filter add dev lo parent ffff: \
22		u32 match mark 0 0xffff \
23		action mirred egress redirect dev ifb_netem0
24}
25
26run_test_v4v6() {
27	# SND will be delayed 10ms
28	# ACK will be delayed 60ms: 10 + 20 ms round-trip
29	# allow +/- tolerance of 8ms
30	# wait for ACK to be queued
31	local -r args="$@ -v 10000 -V 60000 -t 8000 -S 80000"
32
33	./txtimestamp ${args} -4 -L 127.0.0.1
34	./txtimestamp ${args} -6 -L ::1
35}
36
37run_test_tcpudpraw() {
38	local -r args=$@
39
40	run_test_v4v6 ${args}		# tcp
41	run_test_v4v6 ${args} -u	# udp
42	run_test_v4v6 ${args} -r	# raw
43	run_test_v4v6 ${args} -R	# raw (IPPROTO_RAW)
44	run_test_v4v6 ${args} -P	# pf_packet
45}
46
47run_test_all() {
48	setup
49	run_test_tcpudpraw		# setsockopt
50	run_test_tcpudpraw -C		# cmsg
51	run_test_tcpudpraw -n		# timestamp w/o data
52	echo "OK. All tests passed"
53}
54
55run_test_one() {
56	setup
57	./txtimestamp $@
58}
59
60usage() {
61	echo "Usage: $0 [ -r | --run ] <txtimestamp args> | [ -h | --help ]"
62	echo "  (no args)  Run all tests"
63	echo "  -r|--run  Run an individual test with arguments"
64	echo "  -h|--help Help"
65}
66
67main() {
68	if [[ $# -eq 0 ]]; then
69		run_test_all
70	else
71		if [[ "$1" = "-r" || "$1" == "--run" ]]; then
72			shift
73			run_test_one $@
74		else
75			usage
76		fi
77	fi
78}
79
80if [[ -z "$(ip netns identify)" ]]; then
81	./in_netns.sh $0 $@
82else
83	main $@
84fi
85