#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Double quotes to prevent globbing and word splitting is recommended in new
# code but we accept it, especially because there were too many before having
# address all other issues detected by shellcheck.
#shellcheck disable=SC2086
. "$(dirname "${0}")/mptcp_lib.sh"
ns1=""
ns2=""
ns3=""
capture=false
timeout_poll=30
timeout_test=$((timeout_poll * 2 + 1))
# a bit more space: because we have more to display
MPTCP_LIB_TEST_FORMAT="%02u %-60s"
ret=0
bail=0
slack=50
large=""
small=""
sout=""
cout=""
capout=""
size=0
usage() {
echo "Usage: $0 [ -b ] [ -c ] [ -d ] [ -i]"
echo -e "\t-b: bail out after first error, otherwise runs al testcases"
echo -e "\t-c: capture packets for each test using tcpdump (default: no capture)"
echo -e "\t-d: debug this script"
echo -e "\t-i: use 'ip mptcp' instead of 'pm_nl_ctl'"
}
# This function is used in the cleanup trap
#shellcheck disable=SC2317
cleanup()
{
rm -f "$cout" "$sout"
rm -f "$large" "$small"
rm -f "$capout"
mptcp_lib_ns_exit "${ns1}" "${ns2}" "${ns3}"
}
mptcp_lib_check_mptcp
mptcp_lib_check_tools ip tc
# "$ns1" ns2 ns3
# ns1eth1 ns2eth1 ns2eth3 ns3eth1
# netem
# ns1eth2 ns2eth2
# netem
setup()
{
large=$(mktemp)
small=$(mktemp)
sout=$(mktemp)
cout=$(mktemp)
capout=$(mktemp)
size=$((2 * 2048 * 4096))
dd if=/dev/zero of=$small bs=4096 count=20 >/dev/null 2>&1
dd if=/dev/zero of=$large bs=4096 count=$((size / 4096)) >/dev/null 2>&1
trap cleanup EXIT
mptcp_lib_ns_init ns1 ns2 ns3
ip link add ns1eth1 netns "$ns1" type veth peer name ns2eth1 netns "$ns2"
ip link add ns1eth2 netns "$ns1" type veth peer name ns2eth2 netns "$ns2"
ip link add ns2eth3 netns "$ns2" type veth peer name ns3eth1 netns "$ns3"
ip -net "$ns1" addr add 10.0.1.1/24 dev ns1eth1
ip -net "$ns1" addr add dead:beef:1::1/64 dev ns1eth1 nodad
ip -net "$ns1" link set ns1eth1 up mtu 1500
ip -net "$ns1" route add default via 10.0.1.2
ip -net "$ns1" route add default via dead:beef:1::2
ip -net "$ns1" addr add 10.0.2.1/24 dev ns1eth2
ip -net "$ns1" addr add dead:beef:2::1/64 dev ns1eth2 nodad
ip -net "$ns1" link set ns1eth2 up mtu 1500
ip -net "$ns1" route add default via 10.0.2.2 metric 101
ip -net "$ns1" route add default via dead:beef:2::2 metric 101
mptcp_lib_pm_nl_set_limits "${ns1}" 1 1
mptcp_lib_pm_nl_add_endpoint "${ns1}" 10.0.2.1 dev ns1eth2 flags subflow
ip -net "$ns2" addr add 10.0.1.2/24 dev ns2eth1
ip -net "$ns2" addr add dead:beef:1::2/64 dev ns2eth1 nodad
ip -net "$ns2" link set ns2eth1 up mtu 1500
ip -net "$ns2" addr add 10.0.2.2/24 dev ns2eth2
ip -net "$ns2" addr add dead:beef:2::2/64 dev ns2eth2 nodad
ip -net "$ns2" link set ns2eth2 up mtu 1500
ip -net "$ns2" addr add 10.0.3.2/24 dev ns2eth3
ip -net "$ns2" addr add dead:beef:3::2/64 dev ns2eth3 nodad
ip -net "$ns2" link set ns2eth3 up mtu 1500
ip netns exec "$ns2" sysctl -q net.ipv4.ip_forward=1
ip netns exec "$ns2" sysctl -q net.ipv6.conf.all.forwarding=1
ip -net "$ns3" addr add 10.0.3.3/24 dev ns3eth1
ip -net "$ns3" addr add dead:beef:3::3/64 dev ns3eth1 nodad
ip -net "$ns3" link set ns3eth1 up mtu 1500
ip -net "$ns3" route add default via 10.0.3.2
ip -net "$ns3" route add default via dead:beef:3::2
mptcp_lib_pm_nl_set_limits "${ns3}" 1 1
# debug build can slow down measurably the test program
# we use quite tight time limit on the run-time, to ensure
# maximum B/W usage.
# Use kmemleak/lockdep/kasan/prove_locking presence as a rough
# estimate for this being a debug kernel and increase the
# maximum run-time accordingly. Observed run times for CI builds
# running selftests, including kbuild, were used to determine the
# amount of time to add.
grep -q ' kmemleak_init$\| lockdep_init$\| kasan_init$\| prove_locking$' /proc/kallsyms && slack=$((slack+550))
}
do_transfer()
{
local cin=$1
local sin=$2
local max_time=$3
local port
port=$((10000+MPTCP_LIB_TEST_COUNTER))
:> "$cout"
:> "$sout"
:> "$capout"
if $capture; then
local capuser
local rndh="${ns1:4}"
if [ -z $SUDO_USER ] ; then
capuser=""
else
capuser="-Z $SUDO_USER"
fi
local capfile="${rndh}-${port}"
local capopt="-i any -s 65535 -B 32768 ${capuser}"
ip netns exec ${ns3} tcpdump ${capopt} -w "${capfile}-listener.pcap" >> "${capout}" 2>&1 &
local cappid_listener=$!
ip netns exec ${ns1} tcpdump ${capopt} -w "${capfile}-connector.pcap" >> "${capout}" 2>&1 &
local cappid_connector=$!
sleep 1
fi
timeout ${timeout_test} \
ip netns exec ${ns3} \
./mptcp_connect -jt ${timeout_poll} -l -p $port -T $max_time \
0.0.0.0 < "$sin" > "$sout" &
local spid=$!
mptcp_lib_wait_local_port_listen "${ns3}" "${port}"
timeout ${timeout_test} \
ip netns exec ${ns1} \
./mptcp_connect -jt ${timeout_poll} -p $port -T $max_time \
10.0.3.3 < "$cin" > "$cout" &
local cpid=$!
wait $cpid
local retc=$?
wait $spid
local rets=$?
if $capture; then
sleep 1
kill ${cappid_listener}
kill ${cappid_connector}
fi
cmp $sin $cout > /dev/null 2>&1
local cmps=$?
cmp $cin $sout > /dev/null 2>&1
local cmpc=$?
printf "%-16s" " max $max_time "
if [ $retc -eq 0 ] && [ $rets -eq 0 ] && \
[ $cmpc -eq 0 ] && [ $cmps -eq 0 ]; then
mptcp_lib_pr_ok
cat "$capout"
return 0
fi
mptcp_lib_pr_fail
echo "client exit code $retc, server $rets" 1>&2
echo -e "\nnetns ${ns3} socket stat for $port:" 1>&2
ip netns exec ${ns3} ss -nita 1>&2 -o "sport = :$port"
echo -e "\nnetns ${ns1} socket stat for $port:" 1>&2
ip netns exec ${ns1} ss -nita 1>&2 -o "dport = :$port"
ls -l $sin $cout
ls -l $cin $sout
cat "$capout"
return 1
}
run_test()
{
local rate1=$1
local rate2=$2
local delay1=$3
local delay2=$4
local lret
local dev
shift 4
local msg=$*
[ $delay1 -gt 0 ] && delay1="delay ${delay1}ms" || delay1=""
[ $delay2 -gt 0 ] && delay2="delay ${delay2}ms" || delay2=""
for dev in ns1eth1 ns1eth2; do
tc -n $ns1 qdisc del dev $dev root >/dev/null 2>&1
done
for dev in ns2eth1 ns2eth2; do
tc -n $ns2 qdisc del dev $dev root >/dev/null 2>&1
done
tc -n $ns1 qdisc add dev ns1eth1 root netem rate ${rate1}mbit $delay1
tc -n $ns1 qdisc add dev ns1eth2 root netem rate ${rate2}mbit $delay2
tc -n $ns2 qdisc add dev ns2eth1 root netem rate ${rate1}mbit $delay1
tc -n $ns2 qdisc add dev ns2eth2 root netem rate ${rate2}mbit $delay2
# time is measured in ms, account for transfer size, aggregated link speed
# and header overhead (10%)
# ms byte -> bit 10% mbit -> kbit -> bit 10%
local time=$((1000 * size * 8 * 10 / ((rate1 + rate2) * 1000 * 1000 * 9) ))
# mptcp_connect will do some sleeps to allow the mp_join handshake
# completion (see mptcp_connect): 200ms on each side, add some slack
time=$((time + 400 + slack))
mptcp_lib_print_title "$msg"
do_transfer $small $large $time
lret=$?
mptcp_lib_result_code "${lret}" "${msg}"
if [ $lret -ne 0 ] && ! mptcp_lib_subtest_is_flaky; then
ret=$lret
[ $bail -eq 0 ] || exit $ret
fi
msg+=" - reverse direction"
mptcp_lib_print_title "${msg}"
do_transfer $large $small $time
lret=$?
mptcp_lib_result_code "${lret}" "${msg}"
if [ $lret -ne 0 ] && ! mptcp_lib_subtest_is_flaky; then
ret=$lret
[ $bail -eq 0 ] || exit $ret
fi
}
while getopts "bcdhi" option;do
case "$option" in
"h")
usage $0
exit ${KSFT_PASS}
;;
"b")
bail=1
;;
"c")
capture=true
;;
"d")
set -x
;;
"i")
mptcp_lib_set_ip_mptcp
;;
"?")
usage $0
exit ${KSFT_FAIL}
;;
esac
done
setup
mptcp_lib_subtests_last_ts_reset
run_test 10 10 0 0 "balanced bwidth"
run_test 10 10 1 25 "balanced bwidth with unbalanced delay"
# we still need some additional infrastructure to pass the following test-cases
MPTCP_LIB_SUBTEST_FLAKY=1 run_test 10 3 0 0 "unbalanced bwidth"
run_test 10 3 1 25 "unbalanced bwidth with unbalanced delay"
run_test 10 3 25 1 "unbalanced bwidth with opposed, unbalanced delay"
mptcp_lib_result_print_all_tap
exit $ret
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