1 #! /bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3
4 . "$(dirname "${0}")/../lib.sh"
5 . "$(dirname "${0}")/../net_helper.sh"
6
7 readonly KSFT_PASS=0
8 readonly KSFT_FAIL=1
9 readonly KSFT_SKIP=4
10
11 # shellcheck disable=SC2155 # declare and assign separately
12 readonly KSFT_TEST="${MPTCP_LIB_KSFT_TEST:-$(basename "${0}" .sh)}"
13
14 # These variables are used in some selftests, read-only
15 declare -rx MPTCP_LIB_EVENT_CREATED=1 # MPTCP_EVENT_CREATED
16 declare -rx MPTCP_LIB_EVENT_ESTABLISHED=2 # MPTCP_EVENT_ESTABLISHED
17 declare -rx MPTCP_LIB_EVENT_CLOSED=3 # MPTCP_EVENT_CLOSED
18 declare -rx MPTCP_LIB_EVENT_ANNOUNCED=6 # MPTCP_EVENT_ANNOUNCED
19 declare -rx MPTCP_LIB_EVENT_REMOVED=7 # MPTCP_EVENT_REMOVED
20 declare -rx MPTCP_LIB_EVENT_SUB_ESTABLISHED=10 # MPTCP_EVENT_SUB_ESTABLISHED
21 declare -rx MPTCP_LIB_EVENT_SUB_CLOSED=11 # MPTCP_EVENT_SUB_CLOSED
22 declare -rx MPTCP_LIB_EVENT_SUB_PRIORITY=13 # MPTCP_EVENT_SUB_PRIORITY
23 declare -rx MPTCP_LIB_EVENT_LISTENER_CREATED=15 # MPTCP_EVENT_LISTENER_CREATED
24 declare -rx MPTCP_LIB_EVENT_LISTENER_CLOSED=16 # MPTCP_EVENT_LISTENER_CLOSED
25
26 declare -rx MPTCP_LIB_AF_INET=2
27 declare -rx MPTCP_LIB_AF_INET6=10
28
29 MPTCP_LIB_SUBTESTS=()
30 MPTCP_LIB_SUBTESTS_DUPLICATED=0
31 MPTCP_LIB_SUBTEST_FLAKY=0
32 MPTCP_LIB_SUBTESTS_LAST_TS_MS=
33 MPTCP_LIB_TEST_COUNTER=0
34 MPTCP_LIB_TEST_FORMAT="%02u %-50s"
35 MPTCP_LIB_IP_MPTCP=0
36
37 # only if supported (or forced) and not disabled, see no-color.org
38 if { [ -t 1 ] || [ "${SELFTESTS_MPTCP_LIB_COLOR_FORCE:-}" = "1" ]; } &&
39 [ "${NO_COLOR:-}" != "1" ]; then
40 readonly MPTCP_LIB_COLOR_RED="\E[1;31m"
41 readonly MPTCP_LIB_COLOR_GREEN="\E[1;32m"
42 readonly MPTCP_LIB_COLOR_YELLOW="\E[1;33m"
43 readonly MPTCP_LIB_COLOR_BLUE="\E[1;34m"
44 readonly MPTCP_LIB_COLOR_RESET="\E[0m"
45 else
46 readonly MPTCP_LIB_COLOR_RED=
47 readonly MPTCP_LIB_COLOR_GREEN=
48 readonly MPTCP_LIB_COLOR_YELLOW=
49 readonly MPTCP_LIB_COLOR_BLUE=
50 readonly MPTCP_LIB_COLOR_RESET=
51 fi
52
53 # SELFTESTS_MPTCP_LIB_OVERRIDE_FLAKY env var can be set not to ignore errors
54 # from subtests marked as flaky
55 mptcp_lib_override_flaky() {
56 [ "${SELFTESTS_MPTCP_LIB_OVERRIDE_FLAKY:-}" = 1 ]
57 }
58
59 mptcp_lib_subtest_is_flaky() {
60 [ "${MPTCP_LIB_SUBTEST_FLAKY}" = 1 ] && ! mptcp_lib_override_flaky
61 }
62
63 # $1: color, $2: text
64 mptcp_lib_print_color() {
65 echo -e "${MPTCP_LIB_START_PRINT:-}${*}${MPTCP_LIB_COLOR_RESET}"
66 }
67
68 mptcp_lib_print_ok() {
69 mptcp_lib_print_color "${MPTCP_LIB_COLOR_GREEN}${*}"
70 }
71
72 mptcp_lib_print_warn() {
73 mptcp_lib_print_color "${MPTCP_LIB_COLOR_YELLOW}${*}"
74 }
75
76 mptcp_lib_print_info() {
77 mptcp_lib_print_color "${MPTCP_LIB_COLOR_BLUE}${*}"
78 }
79
80 mptcp_lib_print_err() {
81 mptcp_lib_print_color "${MPTCP_LIB_COLOR_RED}${*}"
82 }
83
84 # shellcheck disable=SC2120 # parameters are optional
85 mptcp_lib_pr_ok() {
86 mptcp_lib_print_ok "[ OK ]${1:+ ${*}}"
87 }
88
89 mptcp_lib_pr_skip() {
90 mptcp_lib_print_warn "[SKIP]${1:+ ${*}}"
91 }
92
93 mptcp_lib_pr_fail() {
94 local title cmt
95
96 if mptcp_lib_subtest_is_flaky; then
97 title="IGNO"
98 cmt=" (flaky)"
99 else
100 title="FAIL"
101 fi
102
103 mptcp_lib_print_err "[${title}]${cmt}${1:+ ${*}}"
104 }
105
106 mptcp_lib_pr_info() {
107 mptcp_lib_print_info "INFO: ${*}"
108 }
109
110 # SELFTESTS_MPTCP_LIB_EXPECT_ALL_FEATURES env var can be set when validating all
111 # features using the last version of the kernel and the selftests to make sure
112 # a test is not being skipped by mistake.
113 mptcp_lib_expect_all_features() {
114 [ "${SELFTESTS_MPTCP_LIB_EXPECT_ALL_FEATURES:-}" = "1" ]
115 }
116
117 # $1: msg
118 mptcp_lib_fail_if_expected_feature() {
119 if mptcp_lib_expect_all_features; then
120 echo "ERROR: missing feature: ${*}"
121 exit ${KSFT_FAIL}
122 fi
123
124 return 1
125 }
126
127 # $1: file
128 mptcp_lib_has_file() {
129 local f="${1}"
130
131 if [ -f "${f}" ]; then
132 return 0
133 fi
134
135 mptcp_lib_fail_if_expected_feature "${f} file not found"
136 }
137
138 mptcp_lib_check_mptcp() {
139 if ! mptcp_lib_has_file "/proc/sys/net/mptcp/enabled"; then
140 mptcp_lib_pr_skip "MPTCP support is not available"
141 exit ${KSFT_SKIP}
142 fi
143 }
144
145 mptcp_lib_check_kallsyms() {
146 if ! mptcp_lib_has_file "/proc/kallsyms"; then
147 mptcp_lib_pr_skip "CONFIG_KALLSYMS is missing"
148 exit ${KSFT_SKIP}
149 fi
150 }
151
152 # Internal: use mptcp_lib_kallsyms_has() instead
153 __mptcp_lib_kallsyms_has() {
154 local sym="${1}"
155
156 mptcp_lib_check_kallsyms
157
158 grep -q " ${sym}" /proc/kallsyms
159 }
160
161 # $1: part of a symbol to look at, add '$' at the end for full name
162 mptcp_lib_kallsyms_has() {
163 local sym="${1}"
164
165 if __mptcp_lib_kallsyms_has "${sym}"; then
166 return 0
167 fi
168
169 mptcp_lib_fail_if_expected_feature "${sym} symbol not found"
170 }
171
172 # $1: part of a symbol to look at, add '$' at the end for full name
173 mptcp_lib_kallsyms_doesnt_have() {
174 local sym="${1}"
175
176 if ! __mptcp_lib_kallsyms_has "${sym}"; then
177 return 0
178 fi
179
180 mptcp_lib_fail_if_expected_feature "${sym} symbol has been found"
181 }
182
183 # !!!AVOID USING THIS!!!
184 # Features might not land in the expected version and features can be backported
185 #
186 # $1: kernel version, e.g. 6.3
187 mptcp_lib_kversion_ge() {
188 local exp_maj="${1%.*}"
189 local exp_min="${1#*.}"
190 local v maj min
191
192 # If the kernel has backported features, set this env var to 1:
193 if [ "${SELFTESTS_MPTCP_LIB_NO_KVERSION_CHECK:-}" = "1" ]; then
194 return 0
195 fi
196
197 v=$(uname -r | cut -d'.' -f1,2)
198 maj=${v%.*}
199 min=${v#*.}
200
201 if [ "${maj}" -gt "${exp_maj}" ] ||
202 { [ "${maj}" -eq "${exp_maj}" ] && [ "${min}" -ge "${exp_min}" ]; }; then
203 return 0
204 fi
205
206 mptcp_lib_fail_if_expected_feature "kernel version ${1} lower than ${v}"
207 }
208
209 mptcp_lib_subtests_last_ts_reset() {
210 MPTCP_LIB_SUBTESTS_LAST_TS_MS="$(date +%s%3N)"
211 }
212 mptcp_lib_subtests_last_ts_reset
213
214 __mptcp_lib_result_check_duplicated() {
215 local subtest
216
217 for subtest in "${MPTCP_LIB_SUBTESTS[@]}"; do
218 if [[ "${subtest}" == *" - ${KSFT_TEST}: ${*%% #*}" ]]; then
219 MPTCP_LIB_SUBTESTS_DUPLICATED=1
220 mptcp_lib_print_err "Duplicated entry: ${*}"
221 break
222 fi
223 done
224 }
225
226 __mptcp_lib_result_add() {
227 local result="${1}"
228 local time="time="
229 local ts_prev_ms
230 shift
231
232 local id=$((${#MPTCP_LIB_SUBTESTS[@]} + 1))
233
234 __mptcp_lib_result_check_duplicated "${*}"
235
236 # not to add two '#'
237 [[ "${*}" != *"#"* ]] && time="# ${time}"
238
239 ts_prev_ms="${MPTCP_LIB_SUBTESTS_LAST_TS_MS}"
240 mptcp_lib_subtests_last_ts_reset
241 time+="$((MPTCP_LIB_SUBTESTS_LAST_TS_MS - ts_prev_ms))ms"
242
243 MPTCP_LIB_SUBTESTS+=("${result} ${id} - ${KSFT_TEST}: ${*} ${time}")
244 }
245
246 # $1: test name
247 mptcp_lib_result_pass() {
248 __mptcp_lib_result_add "ok" "${1}"
249 }
250
251 # $1: test name
252 mptcp_lib_result_fail() {
253 if mptcp_lib_subtest_is_flaky; then
254 # It might sound better to use 'not ok # TODO' or 'ok # SKIP',
255 # but some CIs don't understand 'TODO' and treat SKIP as errors.
256 __mptcp_lib_result_add "ok" "${1} # IGNORE Flaky"
257 else
258 __mptcp_lib_result_add "not ok" "${1}"
259 fi
260 }
261
262 # $1: test name
263 mptcp_lib_result_skip() {
264 __mptcp_lib_result_add "ok" "${1} # SKIP"
265 }
266
267 # $1: result code ; $2: test name
268 mptcp_lib_result_code() {
269 local ret="${1}"
270 local name="${2}"
271
272 case "${ret}" in
273 "${KSFT_PASS}")
274 mptcp_lib_result_pass "${name}"
275 ;;
276 "${KSFT_FAIL}")
277 mptcp_lib_result_fail "${name}"
278 ;;
279 "${KSFT_SKIP}")
280 mptcp_lib_result_skip "${name}"
281 ;;
282 *)
283 echo "ERROR: wrong result code: ${ret}"
284 exit ${KSFT_FAIL}
285 ;;
286 esac
287 }
288
289 mptcp_lib_result_print_all_tap() {
290 local subtest
291
292 if [ ${#MPTCP_LIB_SUBTESTS[@]} -eq 0 ] ||
293 [ "${SELFTESTS_MPTCP_LIB_NO_TAP:-}" = "1" ]; then
294 return
295 fi
296
297 printf "\nTAP version 13\n"
298 printf "1..%d\n" "${#MPTCP_LIB_SUBTESTS[@]}"
299
300 for subtest in "${MPTCP_LIB_SUBTESTS[@]}"; do
301 printf "%s\n" "${subtest}"
302 done
303
304 if [ "${MPTCP_LIB_SUBTESTS_DUPLICATED}" = 1 ] &&
305 mptcp_lib_expect_all_features; then
306 mptcp_lib_print_err "Duplicated test entries"
307 exit ${KSFT_FAIL}
308 fi
309 }
310
311 # get the value of keyword $1 in the line marked by keyword $2
312 mptcp_lib_get_info_value() {
313 grep "${2}" | sed -n 's/.*\('"${1}"':\)\([0-9a-f:.]*\).*$/\2/p;q'
314 }
315
316 # $1: info name ; $2: evts_ns ; [$3: event type; [$4: addr]]
317 mptcp_lib_evts_get_info() {
318 grep "${4:-}" "${2}" | mptcp_lib_get_info_value "${1}" "^type:${3:-1},"
319 }
320
321 # $1: PID
322 mptcp_lib_kill_wait() {
323 [ "${1}" -eq 0 ] && return 0
324
325 kill -SIGUSR1 "${1}" > /dev/null 2>&1
326 kill "${1}" > /dev/null 2>&1
327 wait "${1}" 2>/dev/null
328 }
329
330 # $1: IP address
331 mptcp_lib_is_v6() {
332 [ -z "${1##*:*}" ]
333 }
334
335 # $1: ns, $2: MIB counter
336 mptcp_lib_get_counter() {
337 local ns="${1}"
338 local counter="${2}"
339 local count
340
341 count=$(ip netns exec "${ns}" nstat -asz "${counter}" |
342 awk 'NR==1 {next} {print $2}')
343 if [ -z "${count}" ]; then
344 mptcp_lib_fail_if_expected_feature "${counter} counter"
345 return 1
346 fi
347
348 echo "${count}"
349 }
350
351 mptcp_lib_make_file() {
352 local name="${1}"
353 local bs="${2}"
354 local size="${3}"
355
356 dd if=/dev/urandom of="${name}" bs="${bs}" count="${size}" 2> /dev/null
357 echo -e "\nMPTCP_TEST_FILE_END_MARKER" >> "${name}"
358 }
359
360 # $1: file
361 mptcp_lib_print_file_err() {
362 ls -l "${1}" 1>&2
363 echo "Trailing bytes are: "
364 tail -c 27 "${1}"
365 }
366
367 # $1: input file ; $2: output file ; $3: what kind of file
368 mptcp_lib_check_transfer() {
369 local in="${1}"
370 local out="${2}"
371 local what="${3}"
372
373 if ! cmp "$in" "$out" > /dev/null 2>&1; then
374 mptcp_lib_pr_fail "$what does not match (in, out):"
375 mptcp_lib_print_file_err "$in"
376 mptcp_lib_print_file_err "$out"
377
378 return 1
379 fi
380
381 return 0
382 }
383
384 # $1: ns, $2: port
385 mptcp_lib_wait_local_port_listen() {
386 wait_local_port_listen "${@}" "tcp"
387 }
388
389 mptcp_lib_check_output() {
390 local err="${1}"
391 local cmd="${2}"
392 local expected="${3}"
393 local cmd_ret=0
394 local out
395
396 if ! out=$(${cmd} 2>"${err}"); then
397 cmd_ret=${?}
398 fi
399
400 if [ ${cmd_ret} -ne 0 ]; then
401 mptcp_lib_pr_fail "command execution '${cmd}' stderr"
402 cat "${err}"
403 return 2
404 elif [ "${out}" = "${expected}" ]; then
405 return 0
406 else
407 mptcp_lib_pr_fail "expected '${expected}' got '${out}'"
408 return 1
409 fi
410 }
411
412 mptcp_lib_check_tools() {
413 local tool
414
415 for tool in "${@}"; do
416 case "${tool}" in
417 "ip")
418 if ! ip -Version &> /dev/null; then
419 mptcp_lib_pr_skip "Could not run test without ip tool"
420 exit ${KSFT_SKIP}
421 fi
422 ;;
423 "tc")
424 if ! tc -help &> /dev/null; then
425 mptcp_lib_pr_skip "Could not run test without tc tool"
426 exit ${KSFT_SKIP}
427 fi
428 ;;
429 "ss")
430 if ! ss -h | grep -q MPTCP; then
431 mptcp_lib_pr_skip "ss tool does not support MPTCP"
432 exit ${KSFT_SKIP}
433 fi
434 ;;
435 "iptables"* | "ip6tables"*)
436 if ! "${tool}" -V &> /dev/null; then
437 mptcp_lib_pr_skip "Could not run all tests without ${tool}"
438 exit ${KSFT_SKIP}
439 fi
440 ;;
441 *)
442 mptcp_lib_pr_fail "Internal error: unsupported tool: ${tool}"
443 exit ${KSFT_FAIL}
444 ;;
445 esac
446 done
447 }
448
449 mptcp_lib_ns_init() {
450 if ! setup_ns "${@}"; then
451 mptcp_lib_pr_fail "Failed to setup namespaces ${*}"
452 exit ${KSFT_FAIL}
453 fi
454
455 local netns
456 for netns in "${@}"; do
457 ip netns exec "${!netns}" sysctl -q net.mptcp.enabled=1
458 ip netns exec "${!netns}" sysctl -q net.ipv4.conf.all.rp_filter=0
459 ip netns exec "${!netns}" sysctl -q net.ipv4.conf.default.rp_filter=0
460 done
461 }
462
463 mptcp_lib_ns_exit() {
464 cleanup_ns "${@}"
465
466 local netns
467 for netns in "${@}"; do
468 rm -f /tmp/"${netns}".{nstat,out}
469 done
470 }
471
472 mptcp_lib_events() {
473 local ns="${1}"
474 local evts="${2}"
475 declare -n pid="${3}"
476
477 :>"${evts}"
478
479 mptcp_lib_kill_wait "${pid:-0}"
480 ip netns exec "${ns}" ./pm_nl_ctl events >> "${evts}" 2>&1 &
481 pid=$!
482 }
483
484 mptcp_lib_print_title() {
485 : "${MPTCP_LIB_TEST_COUNTER:?}"
486 : "${MPTCP_LIB_TEST_FORMAT:?}"
487
488 # shellcheck disable=SC2059 # the format is in a variable
489 printf "${MPTCP_LIB_TEST_FORMAT}" "$((++MPTCP_LIB_TEST_COUNTER))" "${*}"
490 }
491
492 # $1: var name ; $2: prev ret
493 mptcp_lib_check_expected_one() {
494 local var="${1}"
495 local exp="e_${var}"
496 local prev_ret="${2}"
497
498 if [ "${!var}" = "${!exp}" ]; then
499 return 0
500 fi
501
502 if [ "${prev_ret}" = "0" ]; then
503 mptcp_lib_pr_fail
504 fi
505
506 mptcp_lib_print_err "Expected value for '${var}': '${!exp}', got '${!var}'."
507 return 1
508 }
509
510 # $@: all var names to check
511 mptcp_lib_check_expected() {
512 local rc=0
513 local var
514
515 for var in "${@}"; do
516 mptcp_lib_check_expected_one "${var}" "${rc}" || rc=1
517 done
518
519 return "${rc}"
520 }
521
522 # shellcheck disable=SC2034 # Some variables are used below but indirectly
523 mptcp_lib_verify_listener_events() {
524 local evt=${1}
525 local e_type=${2}
526 local e_family=${3}
527 local e_saddr=${4}
528 local e_sport=${5}
529 local type
530 local family
531 local saddr
532 local sport
533 local rc=0
534
535 type=$(mptcp_lib_evts_get_info type "${evt}" "${e_type}")
536 family=$(mptcp_lib_evts_get_info family "${evt}" "${e_type}")
537 if [ "${family}" ] && [ "${family}" = "${AF_INET6}" ]; then
538 saddr=$(mptcp_lib_evts_get_info saddr6 "${evt}" "${e_type}")
539 else
540 saddr=$(mptcp_lib_evts_get_info saddr4 "${evt}" "${e_type}")
541 fi
542 sport=$(mptcp_lib_evts_get_info sport "${evt}" "${e_type}")
543
544 mptcp_lib_check_expected "type" "family" "saddr" "sport" || rc="${?}"
545 return "${rc}"
546 }
547
548 mptcp_lib_set_ip_mptcp() {
549 MPTCP_LIB_IP_MPTCP=1
550 }
551
552 mptcp_lib_is_ip_mptcp() {
553 [ "${MPTCP_LIB_IP_MPTCP}" = "1" ]
554 }
555
556 # format: <id>,<ip>,<flags>,<dev>
557 mptcp_lib_pm_nl_format_endpoints() {
558 local entry id ip flags dev port
559
560 for entry in "${@}"; do
561 IFS=, read -r id ip flags dev port <<< "${entry}"
562 if mptcp_lib_is_ip_mptcp; then
563 echo -n "${ip}"
564 [ -n "${port}" ] && echo -n " port ${port}"
565 echo -n " id ${id}"
566 [ -n "${flags}" ] && echo -n " ${flags}"
567 [ -n "${dev}" ] && echo -n " dev ${dev}"
568 echo " " # always a space at the end
569 else
570 echo -n "id ${id}"
571 echo -n " flags ${flags//" "/","}"
572 [ -n "${dev}" ] && echo -n " dev ${dev}"
573 echo -n " ${ip}"
574 [ -n "${port}" ] && echo -n " ${port}"
575 echo ""
576 fi
577 done
578 }
579
580 mptcp_lib_pm_nl_get_endpoint() {
581 local ns=${1}
582 local id=${2}
583
584 if mptcp_lib_is_ip_mptcp; then
585 ip -n "${ns}" mptcp endpoint show id "${id}"
586 else
587 ip netns exec "${ns}" ./pm_nl_ctl get "${id}"
588 fi
589 }
590
591 mptcp_lib_pm_nl_set_limits() {
592 local ns=${1}
593 local addrs=${2}
594 local subflows=${3}
595
596 if mptcp_lib_is_ip_mptcp; then
597 ip -n "${ns}" mptcp limits set add_addr_accepted "${addrs}" subflows "${subflows}"
598 else
599 ip netns exec "${ns}" ./pm_nl_ctl limits "${addrs}" "${subflows}"
600 fi
601 }
602
603 mptcp_lib_pm_nl_add_endpoint() {
604 local ns=${1}
605 local addr=${2}
606 local flags dev id port
607 local nr=2
608
609 local p
610 for p in "${@}"; do
611 case "${p}" in
612 "flags" | "dev" | "id" | "port")
613 eval "${p}"=\$"${nr}"
614 ;;
615 esac
616
617 nr=$((nr + 1))
618 done
619
620 if mptcp_lib_is_ip_mptcp; then
621 # shellcheck disable=SC2086 # blanks in flags, no double quote
622 ip -n "${ns}" mptcp endpoint add "${addr}" ${flags//","/" "} \
623 ${dev:+dev "${dev}"} ${id:+id "${id}"} ${port:+port "${port}"}
624 else
625 ip netns exec "${ns}" ./pm_nl_ctl add "${addr}" ${flags:+flags "${flags}"} \
626 ${dev:+dev "${dev}"} ${id:+id "${id}"} ${port:+port "${port}"}
627 fi
628 }
629
630 mptcp_lib_pm_nl_del_endpoint() {
631 local ns=${1}
632 local id=${2}
633 local addr=${3}
634
635 if mptcp_lib_is_ip_mptcp; then
636 [ "${id}" -ne 0 ] && addr=''
637 ip -n "${ns}" mptcp endpoint delete id "${id}" ${addr:+"${addr}"}
638 else
639 ip netns exec "${ns}" ./pm_nl_ctl del "${id}" "${addr}"
640 fi
641 }
642
643 mptcp_lib_pm_nl_flush_endpoint() {
644 local ns=${1}
645
646 if mptcp_lib_is_ip_mptcp; then
647 ip -n "${ns}" mptcp endpoint flush
648 else
649 ip netns exec "${ns}" ./pm_nl_ctl flush
650 fi
651 }
652
653 mptcp_lib_pm_nl_show_endpoints() {
654 local ns=${1}
655
656 if mptcp_lib_is_ip_mptcp; then
657 ip -n "${ns}" mptcp endpoint show
658 else
659 ip netns exec "${ns}" ./pm_nl_ctl dump
660 fi
661 }
662
663 mptcp_lib_pm_nl_change_endpoint() {
664 local ns=${1}
665 local id=${2}
666 local flags=${3}
667
668 if mptcp_lib_is_ip_mptcp; then
669 # shellcheck disable=SC2086 # blanks in flags, no double quote
670 ip -n "${ns}" mptcp endpoint change id "${id}" ${flags//","/" "}
671 else
672 ip netns exec "${ns}" ./pm_nl_ctl set id "${id}" flags "${flags}"
673 fi
674 }
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