#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # Send packets with transmit timestamps over loopback with netem # Verify that timestamps correspond to netem delay set -e setup() { # set 1ms delay on lo egress tc qdisc add dev lo root netem delay 1ms # set 2ms delay on ifb0 egress modprobe ifb ip link add ifb_netem0 type ifb ip link set dev ifb_netem0 up tc qdisc add dev ifb_netem0 root netem delay 2ms # redirect lo ingress through ifb0 egress tc qdisc add dev lo handle ffff: ingress tc filter add dev lo parent ffff: \ u32 match mark 0 0xffff \ action mirred egress redirect dev ifb_netem0 } run_test_v4v6() { # SND will be delayed 1000us # ACK will be delayed 6000us: 1 + 2 ms round-trip local -r args="$@ -v 1000 -V 6000" ./txtimestamp ${args} -4 -L 127.0.0.1 ./txtimestamp ${args} -6 -L ::1 } run_test_tcpudpraw() { local -r args=$@ run_test_v4v6 ${args} # tcp run_test_v4v6 ${args} -u # udp run_test_v4v6 ${args} -r # raw run_test_v4v6 ${args} -R # raw (IPPROTO_RAW) run_test_v4v6 ${args} -P # pf_packet } run_test_all() { setup run_test_tcpudpraw # setsockopt run_test_tcpudpraw -C # cmsg run_test_tcpudpraw -n # timestamp w/o data echo "OK. All tests passed" } run_test_one() { setup ./txtimestamp $@ } usage() { echo "Usage: $0 [ -r | --run ] | [ -h | --help ]" echo " (no args) Run all tests" echo " -r|--run Run an individual test with arguments" echo " -h|--help Help" } main() { if [[ $# -eq 0 ]]; then run_test_all else if [[ "$1" = "-r" || "$1" == "--run" ]]; then shift run_test_one $@ else usage fi fi } if [[ -z "$(ip netns identify)" ]]; then ./in_netns.sh $0 $@ else main $@ fi