#!/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"
ns=""
timeout_poll=30
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 $((timeout_poll * 10))); do
[ -z "$(ip netns pids "${ns}")" ] && break
sleep 0.1
done
}
# This function is used in the cleanup trap
#shellcheck disable=SC2317
cleanup()
{
ip netns pids "${ns}" | xargs --no-run-if-empty kill -SIGKILL &>/dev/null
mptcp_lib_ns_exit "${ns}"
}
mptcp_lib_check_mptcp
mptcp_lib_check_tools ip ss
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 $command)
mptcp_lib_print_title "$msg"
if [ "$nr" != "$expected" ]; then
if [ "$nr" = "$skip" ] && ! mptcp_lib_expect_all_features; then
mptcp_lib_pr_skip "Feature probably not supported"
mptcp_lib_result_skip "${msg}"
else
mptcp_lib_pr_fail "expected $expected found $nr"
mptcp_lib_result_fail "${msg}"
ret=${KSFT_FAIL}
fi
else
mptcp_lib_pr_ok
mptcp_lib_result_pass "${msg}"
fi
}
__chk_msk_nr()
{
local condition=$1
shift 1
__chk_nr "ss -inmHMN $ns | $condition" "$@"
}
chk_msk_nr()
{
__chk_msk_nr "grep -c token:" "$@"
}
chk_listener_nr()
{
local expected=$1
local msg="$2"
__chk_nr "ss -nlHMON $ns | wc -l" "$expected" "$msg - mptcp" 0
__chk_nr "ss -nlHtON $ns | wc -l" "$expected" "$msg - subflows"
}
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=$((i + 1))
sleep 1
done
mptcp_lib_print_title "$msg"
if [ $i -ge $timeout ]; then
mptcp_lib_pr_fail "timeout while expecting $expected max $max last $nr"
mptcp_lib_result_fail "${msg} # timeout"
ret=${KSFT_FAIL}
elif [ $nr != $expected ]; then
mptcp_lib_pr_fail "expected $expected found $nr"
mptcp_lib_result_fail "${msg} # unexpected result"
ret=${KSFT_FAIL}
else
mptcp_lib_pr_ok
mptcp_lib_result_pass "${msg}"
fi
}
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: 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}" "${msg}" ""
}
msk_info_get_value()
{
local port="${1}"
local info="${2}"
ss -N "${ns}" -inHM dport "${port}" | \
mptcp_lib_get_info_value "${info}" "${info}"
}
chk_msk_info()
{
local port="${1}"
local info="${2}"
local cnt="${3}"
local msg="....chk ${info}"
local delta_ms=250 # half what we waited before, just to be sure
local now
now=$(msk_info_get_value "${port}" "${info}")
mptcp_lib_print_title "${msg}"
if { [ -z "${cnt}" ] || [ -z "${now}" ]; } &&
! mptcp_lib_expect_all_features; then
mptcp_lib_pr_skip "Feature probably not supported"
mptcp_lib_result_skip "${msg}"
elif [ "$((cnt + delta_ms))" -lt "${now}" ]; then
mptcp_lib_pr_ok
mptcp_lib_result_pass "${msg}"
else
mptcp_lib_pr_fail "value of ${info} changed by $((now - cnt))ms," \
"expected at least ${delta_ms}ms"
mptcp_lib_result_fail "${msg}"
ret=${KSFT_FAIL}
fi
}
chk_last_time_info()
{
local port="${1}"
local data_sent data_recv ack_recv
data_sent=$(msk_info_get_value "${port}" "last_data_sent")
data_recv=$(msk_info_get_value "${port}" "last_data_recv")
ack_recv=$(msk_info_get_value "${port}" "last_ack_recv")
sleep 0.5 # wait to check after if the timestamps difference
chk_msk_info "${port}" "last_data_sent" "${data_sent}"
chk_msk_info "${port}" "last_data_recv" "${data_recv}"
chk_msk_info "${port}" "last_ack_recv" "${ack_recv}"
}
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
mptcp_lib_ns_init ns
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 &
mptcp_lib_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_last_time_info 10000
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 &
mptcp_lib_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
mptcp_lib_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"
chk_listener_nr 0 "no listener sockets"
NR_SERVERS=100
for I in $(seq 1 $NR_SERVERS); do
ip netns exec $ns ./mptcp_connect -p $((I + 20001)) \
-t ${timeout_poll} -l 0.0.0.0 >/dev/null 2>&1 &
done
mptcp_lib_wait_local_port_listen $ns $((NR_SERVERS + 20001))
chk_listener_nr $NR_SERVERS "many listener sockets"
# graceful termination
for I in $(seq 1 $NR_SERVERS); do
echo a | ip netns exec $ns ./mptcp_connect -p $((I + 20001)) 127.0.0.1 >/dev/null 2>&1 &
done
flush_pids
mptcp_lib_result_print_all_tap
exit $ret
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