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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
. "$(dirname "${0}")/mptcp_lib.sh"
sec=$(date +%s)
rndh=$(printf %x $sec)-$(mktemp -u XXXXXX)
ns="ns1-$rndh"
ksft_skip=4
test_cnt=1
timeout_poll=100
timeout_test=$((timeout_poll * 2 + 1))
ret=0
flush_pids()
{
# mptcp_connect in join mode will sleep a bit before completing,
# give it some time
sleep 1.1
ip netns pids "${ns}" | xargs --no-run-if-empty kill -SIGUSR1 &>/dev/null
for _ in $(seq 10); do
[ -z "$(ip netns pids "${ns}")" ] && break
sleep 0.1
done
}
cleanup()
{
ip netns pids "${ns}" | xargs --no-run-if-empty kill -SIGKILL &>/dev/null
ip netns del $ns
}
mptcp_lib_check_mptcp
ip -Version > /dev/null 2>&1
if [ $? -ne 0 ];then
echo "SKIP: Could not run test without ip tool"
exit $ksft_skip
fi
ss -h | grep -q MPTCP
if [ $? -ne 0 ];then
echo "SKIP: ss tool does not support MPTCP"
exit $ksft_skip
fi
get_msk_inuse()
{
ip netns exec $ns cat /proc/net/protocols | awk '$1~/^MPTCP$/{print $3}'
}
__chk_nr()
{
local command="$1"
local expected=$2
local msg="$3"
local skip="${4-SKIP}"
local nr
nr=$(eval $command)
printf "%-50s" "$msg"
if [ "$nr" != "$expected" ]; then
if [ "$nr" = "$skip" ] && ! mptcp_lib_expect_all_features; then
echo "[ skip ] Feature probably not supported"
mptcp_lib_result_skip "${msg}"
else
echo "[ fail ] expected $expected found $nr"
mptcp_lib_result_fail "${msg}"
ret=${KSFT_FAIL}
fi
else
echo "[ ok ]"
mptcp_lib_result_pass "${msg}"
fi
test_cnt=$((test_cnt+1))
}
__chk_msk_nr()
{
local condition=$1
shift 1
__chk_nr "ss -inmHMN $ns | $condition" "$@"
}
chk_msk_nr()
{
__chk_msk_nr "grep -c token:" "$@"
}
wait_msk_nr()
{
local condition="grep -c token:"
local expected=$1
local timeout=20
local msg nr
local max=0
local i=0
shift 1
msg=$*
while [ $i -lt $timeout ]; do
nr=$(ss -inmHMN $ns | $condition)
[ $nr == $expected ] && break;
[ $nr -gt $max ] && max=$nr
i=$((i + 1))
sleep 1
done
printf "%-50s" "$msg"
if [ $i -ge $timeout ]; then
echo "[ fail ] timeout while expecting $expected max $max last $nr"
mptcp_lib_result_fail "${msg} # timeout"
ret=${KSFT_FAIL}
elif [ $nr != $expected ]; then
echo "[ fail ] expected $expected found $nr"
mptcp_lib_result_fail "${msg} # unexpected result"
ret=${KSFT_FAIL}
else
echo "[ ok ]"
mptcp_lib_result_pass "${msg}"
fi
test_cnt=$((test_cnt+1))
}
chk_msk_fallback_nr()
{
__chk_msk_nr "grep -c fallback" "$@"
}
chk_msk_remote_key_nr()
{
__chk_msk_nr "grep -c remote_key" "$@"
}
__chk_listen()
{
local filter="$1"
local expected=$2
local msg="$3"
__chk_nr "ss -N $ns -Ml '$filter' | grep -c LISTEN" "$expected" "$msg" 0
}
chk_msk_listen()
{
lport=$1
# destination port search should always return empty list
__chk_listen "dport $lport" 0 "listen match for dport $lport"
# should return 'our' mptcp listen socket
__chk_listen "sport $lport" 1 "listen match for sport $lport"
__chk_listen "src inet:0.0.0.0:$lport" 1 "listen match for saddr and sport"
__chk_listen "" 1 "all listen sockets"
nr=$(ss -Ml $filter | wc -l)
}
chk_msk_inuse()
{
local expected=$1
local msg="....chk ${2:-${expected}} msk in use"
local listen_nr
if [ "${expected}" -eq 0 ]; then
msg+=" after flush"
fi
listen_nr=$(ss -N "${ns}" -Ml | grep -c LISTEN)
expected=$((expected + listen_nr))
for _ in $(seq 10); do
if [ $(get_msk_inuse) -eq $expected ];then
break
fi
sleep 0.1
done
__chk_nr get_msk_inuse $expected "${msg}" 0
}
# $1: ns, $2: port
wait_local_port_listen()
{
local listener_ns="${1}"
local port="${2}"
local port_hex i
port_hex="$(printf "%04X" "${port}")"
for i in $(seq 10); do
ip netns exec "${listener_ns}" cat /proc/net/tcp | \
awk "BEGIN {rc=1} {if (\$2 ~ /:${port_hex}\$/ && \$4 ~ /0A/) {rc=0; exit}} END {exit rc}" &&
break
sleep 0.1
done
}
# $1: cestab nr
chk_msk_cestab()
{
local expected=$1
local msg="....chk ${2:-${expected}} cestab"
if [ "${expected}" -eq 0 ]; then
msg+=" after flush"
fi
__chk_nr "mptcp_lib_get_counter ${ns} MPTcpExtMPCurrEstab" \
"${expected}" "${msg}" ""
}
wait_connected()
{
local listener_ns="${1}"
local port="${2}"
local port_hex i
port_hex="$(printf "%04X" "${port}")"
for i in $(seq 10); do
ip netns exec ${listener_ns} grep -q " 0100007F:${port_hex} " /proc/net/tcp && break
sleep 0.1
done
}
trap cleanup EXIT
ip netns add $ns
ip -n $ns link set dev lo up
echo "a" | \
timeout ${timeout_test} \
ip netns exec $ns \
./mptcp_connect -p 10000 -l -t ${timeout_poll} -w 20 \
0.0.0.0 >/dev/null &
wait_local_port_listen $ns 10000
chk_msk_nr 0 "no msk on netns creation"
chk_msk_listen 10000
echo "b" | \
timeout ${timeout_test} \
ip netns exec $ns \
./mptcp_connect -p 10000 -r 0 -t ${timeout_poll} -w 20 \
127.0.0.1 >/dev/null &
wait_connected $ns 10000
chk_msk_nr 2 "after MPC handshake "
chk_msk_remote_key_nr 2 "....chk remote_key"
chk_msk_fallback_nr 0 "....chk no fallback"
chk_msk_inuse 2
chk_msk_cestab 2
flush_pids
chk_msk_inuse 0 "2->0"
chk_msk_cestab 0 "2->0"
echo "a" | \
timeout ${timeout_test} \
ip netns exec $ns \
./mptcp_connect -p 10001 -l -s TCP -t ${timeout_poll} -w 20 \
0.0.0.0 >/dev/null &
wait_local_port_listen $ns 10001
echo "b" | \
timeout ${timeout_test} \
ip netns exec $ns \
./mptcp_connect -p 10001 -r 0 -t ${timeout_poll} -w 20 \
127.0.0.1 >/dev/null &
wait_connected $ns 10001
chk_msk_fallback_nr 1 "check fallback"
chk_msk_inuse 1
chk_msk_cestab 1
flush_pids
chk_msk_inuse 0 "1->0"
chk_msk_cestab 0 "1->0"
NR_CLIENTS=100
for I in `seq 1 $NR_CLIENTS`; do
echo "a" | \
timeout ${timeout_test} \
ip netns exec $ns \
./mptcp_connect -p $((I+10001)) -l -w 20 \
-t ${timeout_poll} 0.0.0.0 >/dev/null &
done
wait_local_port_listen $ns $((NR_CLIENTS + 10001))
for I in `seq 1 $NR_CLIENTS`; do
echo "b" | \
timeout ${timeout_test} \
ip netns exec $ns \
./mptcp_connect -p $((I+10001)) -w 20 \
-t ${timeout_poll} 127.0.0.1 >/dev/null &
done
wait_msk_nr $((NR_CLIENTS*2)) "many msk socket present"
chk_msk_inuse $((NR_CLIENTS*2)) "many"
chk_msk_cestab $((NR_CLIENTS*2)) "many"
flush_pids
chk_msk_inuse 0 "many->0"
chk_msk_cestab 0 "many->0"
mptcp_lib_result_print_all_tap
exit $ret
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