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1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4# This test is for checking IPv4 and IPv6 FIB behavior in response to
5# different events.
6
7ret=0
8
9VERBOSE=${VERBOSE:=0}
10PAUSE_ON_FAIL=${PAUSE_ON_FAIL:=no}
11IP="ip -netns testns"
12
13log_test()
14{
15 local rc=$1
16 local expected=$2
17 local msg="$3"
18
19 if [ ${rc} -eq ${expected} ]; then
20 printf " TEST: %-60s [ OK ]\n" "${msg}"
21 else
22 ret=1
23 printf " TEST: %-60s [FAIL]\n" "${msg}"
24 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
25 echo
26 echo "hit enter to continue, 'q' to quit"
27 read a
28 [ "$a" = "q" ] && exit 1
29 fi
30 fi
31}
32
33setup()
34{
35 set -e
36 ip netns add testns
37 $IP link set dev lo up
38
39 $IP link add dummy0 type dummy
40 $IP link set dev dummy0 up
41 $IP address add 198.51.100.1/24 dev dummy0
42 $IP -6 address add 2001:db8:1::1/64 dev dummy0
43 set +e
44
45}
46
47cleanup()
48{
49 $IP link del dev dummy0 &> /dev/null
50 ip netns del testns
51}
52
53get_linklocal()
54{
55 local dev=$1
56 local addr
57
58 addr=$($IP -6 -br addr show dev ${dev} | \
59 awk '{
60 for (i = 3; i <= NF; ++i) {
61 if ($i ~ /^fe80/)
62 print $i
63 }
64 }'
65 )
66 addr=${addr/\/*}
67
68 [ -z "$addr" ] && return 1
69
70 echo $addr
71
72 return 0
73}
74
75fib_unreg_unicast_test()
76{
77 echo
78 echo "Single path route test"
79
80 setup
81
82 echo " Start point"
83 $IP route get fibmatch 198.51.100.2 &> /dev/null
84 log_test $? 0 "IPv4 fibmatch"
85 $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null
86 log_test $? 0 "IPv6 fibmatch"
87
88 set -e
89 $IP link del dev dummy0
90 set +e
91
92 echo " Nexthop device deleted"
93 $IP route get fibmatch 198.51.100.2 &> /dev/null
94 log_test $? 2 "IPv4 fibmatch - no route"
95 $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null
96 log_test $? 2 "IPv6 fibmatch - no route"
97
98 cleanup
99}
100
101fib_unreg_multipath_test()
102{
103
104 echo
105 echo "Multipath route test"
106
107 setup
108
109 set -e
110 $IP link add dummy1 type dummy
111 $IP link set dev dummy1 up
112 $IP address add 192.0.2.1/24 dev dummy1
113 $IP -6 address add 2001:db8:2::1/64 dev dummy1
114
115 $IP route add 203.0.113.0/24 \
116 nexthop via 198.51.100.2 dev dummy0 \
117 nexthop via 192.0.2.2 dev dummy1
118 $IP -6 route add 2001:db8:3::/64 \
119 nexthop via 2001:db8:1::2 dev dummy0 \
120 nexthop via 2001:db8:2::2 dev dummy1
121 set +e
122
123 echo " Start point"
124 $IP route get fibmatch 203.0.113.1 &> /dev/null
125 log_test $? 0 "IPv4 fibmatch"
126 $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null
127 log_test $? 0 "IPv6 fibmatch"
128
129 set -e
130 $IP link del dev dummy0
131 set +e
132
133 echo " One nexthop device deleted"
134 $IP route get fibmatch 203.0.113.1 &> /dev/null
135 log_test $? 2 "IPv4 - multipath route removed on delete"
136
137 $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null
138 # In IPv6 we do not flush the entire multipath route.
139 log_test $? 0 "IPv6 - multipath down to single path"
140
141 set -e
142 $IP link del dev dummy1
143 set +e
144
145 echo " Second nexthop device deleted"
146 $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null
147 log_test $? 2 "IPv6 - no route"
148
149 cleanup
150}
151
152fib_unreg_test()
153{
154 fib_unreg_unicast_test
155 fib_unreg_multipath_test
156}
157
158fib_down_unicast_test()
159{
160 echo
161 echo "Single path, admin down"
162
163 setup
164
165 echo " Start point"
166 $IP route get fibmatch 198.51.100.2 &> /dev/null
167 log_test $? 0 "IPv4 fibmatch"
168 $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null
169 log_test $? 0 "IPv6 fibmatch"
170
171 set -e
172 $IP link set dev dummy0 down
173 set +e
174
175 echo " Route deleted on down"
176 $IP route get fibmatch 198.51.100.2 &> /dev/null
177 log_test $? 2 "IPv4 fibmatch"
178 $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null
179 log_test $? 2 "IPv6 fibmatch"
180
181 cleanup
182}
183
184fib_down_multipath_test_do()
185{
186 local down_dev=$1
187 local up_dev=$2
188
189 $IP route get fibmatch 203.0.113.1 \
190 oif $down_dev &> /dev/null
191 log_test $? 2 "IPv4 fibmatch on down device"
192 $IP -6 route get fibmatch 2001:db8:3::1 \
193 oif $down_dev &> /dev/null
194 log_test $? 2 "IPv6 fibmatch on down device"
195
196 $IP route get fibmatch 203.0.113.1 \
197 oif $up_dev &> /dev/null
198 log_test $? 0 "IPv4 fibmatch on up device"
199 $IP -6 route get fibmatch 2001:db8:3::1 \
200 oif $up_dev &> /dev/null
201 log_test $? 0 "IPv6 fibmatch on up device"
202
203 $IP route get fibmatch 203.0.113.1 | \
204 grep $down_dev | grep -q "dead linkdown"
205 log_test $? 0 "IPv4 flags on down device"
206 $IP -6 route get fibmatch 2001:db8:3::1 | \
207 grep $down_dev | grep -q "dead linkdown"
208 log_test $? 0 "IPv6 flags on down device"
209
210 $IP route get fibmatch 203.0.113.1 | \
211 grep $up_dev | grep -q "dead linkdown"
212 log_test $? 1 "IPv4 flags on up device"
213 $IP -6 route get fibmatch 2001:db8:3::1 | \
214 grep $up_dev | grep -q "dead linkdown"
215 log_test $? 1 "IPv6 flags on up device"
216}
217
218fib_down_multipath_test()
219{
220 echo
221 echo "Admin down multipath"
222
223 setup
224
225 set -e
226 $IP link add dummy1 type dummy
227 $IP link set dev dummy1 up
228
229 $IP address add 192.0.2.1/24 dev dummy1
230 $IP -6 address add 2001:db8:2::1/64 dev dummy1
231
232 $IP route add 203.0.113.0/24 \
233 nexthop via 198.51.100.2 dev dummy0 \
234 nexthop via 192.0.2.2 dev dummy1
235 $IP -6 route add 2001:db8:3::/64 \
236 nexthop via 2001:db8:1::2 dev dummy0 \
237 nexthop via 2001:db8:2::2 dev dummy1
238 set +e
239
240 echo " Verify start point"
241 $IP route get fibmatch 203.0.113.1 &> /dev/null
242 log_test $? 0 "IPv4 fibmatch"
243
244 $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null
245 log_test $? 0 "IPv6 fibmatch"
246
247 set -e
248 $IP link set dev dummy0 down
249 set +e
250
251 echo " One device down, one up"
252 fib_down_multipath_test_do "dummy0" "dummy1"
253
254 set -e
255 $IP link set dev dummy0 up
256 $IP link set dev dummy1 down
257 set +e
258
259 echo " Other device down and up"
260 fib_down_multipath_test_do "dummy1" "dummy0"
261
262 set -e
263 $IP link set dev dummy0 down
264 set +e
265
266 echo " Both devices down"
267 $IP route get fibmatch 203.0.113.1 &> /dev/null
268 log_test $? 2 "IPv4 fibmatch"
269 $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null
270 log_test $? 2 "IPv6 fibmatch"
271
272 $IP link del dev dummy1
273 cleanup
274}
275
276fib_down_test()
277{
278 fib_down_unicast_test
279 fib_down_multipath_test
280}
281
282# Local routes should not be affected when carrier changes.
283fib_carrier_local_test()
284{
285 echo
286 echo "Local carrier tests - single path"
287
288 setup
289
290 set -e
291 $IP link set dev dummy0 carrier on
292 set +e
293
294 echo " Start point"
295 $IP route get fibmatch 198.51.100.1 &> /dev/null
296 log_test $? 0 "IPv4 fibmatch"
297 $IP -6 route get fibmatch 2001:db8:1::1 &> /dev/null
298 log_test $? 0 "IPv6 fibmatch"
299
300 $IP route get fibmatch 198.51.100.1 | \
301 grep -q "linkdown"
302 log_test $? 1 "IPv4 - no linkdown flag"
303 $IP -6 route get fibmatch 2001:db8:1::1 | \
304 grep -q "linkdown"
305 log_test $? 1 "IPv6 - no linkdown flag"
306
307 set -e
308 $IP link set dev dummy0 carrier off
309 sleep 1
310 set +e
311
312 echo " Carrier off on nexthop"
313 $IP route get fibmatch 198.51.100.1 &> /dev/null
314 log_test $? 0 "IPv4 fibmatch"
315 $IP -6 route get fibmatch 2001:db8:1::1 &> /dev/null
316 log_test $? 0 "IPv6 fibmatch"
317
318 $IP route get fibmatch 198.51.100.1 | \
319 grep -q "linkdown"
320 log_test $? 1 "IPv4 - linkdown flag set"
321 $IP -6 route get fibmatch 2001:db8:1::1 | \
322 grep -q "linkdown"
323 log_test $? 1 "IPv6 - linkdown flag set"
324
325 set -e
326 $IP address add 192.0.2.1/24 dev dummy0
327 $IP -6 address add 2001:db8:2::1/64 dev dummy0
328 set +e
329
330 echo " Route to local address with carrier down"
331 $IP route get fibmatch 192.0.2.1 &> /dev/null
332 log_test $? 0 "IPv4 fibmatch"
333 $IP -6 route get fibmatch 2001:db8:2::1 &> /dev/null
334 log_test $? 0 "IPv6 fibmatch"
335
336 $IP route get fibmatch 192.0.2.1 | \
337 grep -q "linkdown"
338 log_test $? 1 "IPv4 linkdown flag set"
339 $IP -6 route get fibmatch 2001:db8:2::1 | \
340 grep -q "linkdown"
341 log_test $? 1 "IPv6 linkdown flag set"
342
343 cleanup
344}
345
346fib_carrier_unicast_test()
347{
348 ret=0
349
350 echo
351 echo "Single path route carrier test"
352
353 setup
354
355 set -e
356 $IP link set dev dummy0 carrier on
357 set +e
358
359 echo " Start point"
360 $IP route get fibmatch 198.51.100.2 &> /dev/null
361 log_test $? 0 "IPv4 fibmatch"
362 $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null
363 log_test $? 0 "IPv6 fibmatch"
364
365 $IP route get fibmatch 198.51.100.2 | \
366 grep -q "linkdown"
367 log_test $? 1 "IPv4 no linkdown flag"
368 $IP -6 route get fibmatch 2001:db8:1::2 | \
369 grep -q "linkdown"
370 log_test $? 1 "IPv6 no linkdown flag"
371
372 set -e
373 $IP link set dev dummy0 carrier off
374 set +e
375
376 echo " Carrier down"
377 $IP route get fibmatch 198.51.100.2 &> /dev/null
378 log_test $? 0 "IPv4 fibmatch"
379 $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null
380 log_test $? 0 "IPv6 fibmatch"
381
382 $IP route get fibmatch 198.51.100.2 | \
383 grep -q "linkdown"
384 log_test $? 0 "IPv4 linkdown flag set"
385 $IP -6 route get fibmatch 2001:db8:1::2 | \
386 grep -q "linkdown"
387 log_test $? 0 "IPv6 linkdown flag set"
388
389 set -e
390 $IP address add 192.0.2.1/24 dev dummy0
391 $IP -6 address add 2001:db8:2::1/64 dev dummy0
392 set +e
393
394 echo " Second address added with carrier down"
395 $IP route get fibmatch 192.0.2.2 &> /dev/null
396 log_test $? 0 "IPv4 fibmatch"
397 $IP -6 route get fibmatch 2001:db8:2::2 &> /dev/null
398 log_test $? 0 "IPv6 fibmatch"
399
400 $IP route get fibmatch 192.0.2.2 | \
401 grep -q "linkdown"
402 log_test $? 0 "IPv4 linkdown flag set"
403 $IP -6 route get fibmatch 2001:db8:2::2 | \
404 grep -q "linkdown"
405 log_test $? 0 "IPv6 linkdown flag set"
406
407 cleanup
408}
409
410fib_carrier_test()
411{
412 fib_carrier_local_test
413 fib_carrier_unicast_test
414}
415
416################################################################################
417# Tests on nexthop spec
418
419# run 'ip route add' with given spec
420add_rt()
421{
422 local desc="$1"
423 local erc=$2
424 local vrf=$3
425 local pfx=$4
426 local gw=$5
427 local dev=$6
428 local cmd out rc
429
430 [ "$vrf" = "-" ] && vrf="default"
431 [ -n "$gw" ] && gw="via $gw"
432 [ -n "$dev" ] && dev="dev $dev"
433
434 cmd="$IP route add vrf $vrf $pfx $gw $dev"
435 if [ "$VERBOSE" = "1" ]; then
436 printf "\n COMMAND: $cmd\n"
437 fi
438
439 out=$(eval $cmd 2>&1)
440 rc=$?
441 if [ "$VERBOSE" = "1" -a -n "$out" ]; then
442 echo " $out"
443 fi
444 log_test $rc $erc "$desc"
445}
446
447fib4_nexthop()
448{
449 echo
450 echo "IPv4 nexthop tests"
451
452 echo "<<< write me >>>"
453}
454
455fib6_nexthop()
456{
457 local lldummy=$(get_linklocal dummy0)
458 local llv1=$(get_linklocal dummy0)
459
460 if [ -z "$lldummy" ]; then
461 echo "Failed to get linklocal address for dummy0"
462 return 1
463 fi
464 if [ -z "$llv1" ]; then
465 echo "Failed to get linklocal address for veth1"
466 return 1
467 fi
468
469 echo
470 echo "IPv6 nexthop tests"
471
472 add_rt "Directly connected nexthop, unicast address" 0 \
473 - 2001:db8:101::/64 2001:db8:1::2
474 add_rt "Directly connected nexthop, unicast address with device" 0 \
475 - 2001:db8:102::/64 2001:db8:1::2 "dummy0"
476 add_rt "Gateway is linklocal address" 0 \
477 - 2001:db8:103::1/64 $llv1 "veth0"
478
479 # fails because LL address requires a device
480 add_rt "Gateway is linklocal address, no device" 2 \
481 - 2001:db8:104::1/64 $llv1
482
483 # local address can not be a gateway
484 add_rt "Gateway can not be local unicast address" 2 \
485 - 2001:db8:105::/64 2001:db8:1::1
486 add_rt "Gateway can not be local unicast address, with device" 2 \
487 - 2001:db8:106::/64 2001:db8:1::1 "dummy0"
488 add_rt "Gateway can not be a local linklocal address" 2 \
489 - 2001:db8:107::1/64 $lldummy "dummy0"
490
491 # VRF tests
492 add_rt "Gateway can be local address in a VRF" 0 \
493 - 2001:db8:108::/64 2001:db8:51::2
494 add_rt "Gateway can be local address in a VRF, with device" 0 \
495 - 2001:db8:109::/64 2001:db8:51::2 "veth0"
496 add_rt "Gateway can be local linklocal address in a VRF" 0 \
497 - 2001:db8:110::1/64 $llv1 "veth0"
498
499 add_rt "Redirect to VRF lookup" 0 \
500 - 2001:db8:111::/64 "" "red"
501
502 add_rt "VRF route, gateway can be local address in default VRF" 0 \
503 red 2001:db8:112::/64 2001:db8:51::1
504
505 # local address in same VRF fails
506 add_rt "VRF route, gateway can not be a local address" 2 \
507 red 2001:db8:113::1/64 2001:db8:2::1
508 add_rt "VRF route, gateway can not be a local addr with device" 2 \
509 red 2001:db8:114::1/64 2001:db8:2::1 "dummy1"
510}
511
512# Default VRF:
513# dummy0 - 198.51.100.1/24 2001:db8:1::1/64
514# veth0 - 192.0.2.1/24 2001:db8:51::1/64
515#
516# VRF red:
517# dummy1 - 192.168.2.1/24 2001:db8:2::1/64
518# veth1 - 192.0.2.2/24 2001:db8:51::2/64
519#
520# [ dummy0 veth0 ]--[ veth1 dummy1 ]
521
522fib_nexthop_test()
523{
524 setup
525
526 set -e
527
528 $IP -4 rule add pref 32765 table local
529 $IP -4 rule del pref 0
530 $IP -6 rule add pref 32765 table local
531 $IP -6 rule del pref 0
532
533 $IP link add red type vrf table 1
534 $IP link set red up
535 $IP -4 route add vrf red unreachable default metric 4278198272
536 $IP -6 route add vrf red unreachable default metric 4278198272
537
538 $IP link add veth0 type veth peer name veth1
539 $IP link set dev veth0 up
540 $IP address add 192.0.2.1/24 dev veth0
541 $IP -6 address add 2001:db8:51::1/64 dev veth0
542
543 $IP link set dev veth1 vrf red up
544 $IP address add 192.0.2.2/24 dev veth1
545 $IP -6 address add 2001:db8:51::2/64 dev veth1
546
547 $IP link add dummy1 type dummy
548 $IP link set dev dummy1 vrf red up
549 $IP address add 192.168.2.1/24 dev dummy1
550 $IP -6 address add 2001:db8:2::1/64 dev dummy1
551 set +e
552
553 sleep 1
554 fib4_nexthop
555 fib6_nexthop
556
557 (
558 $IP link del dev dummy1
559 $IP link del veth0
560 $IP link del red
561 ) 2>/dev/null
562 cleanup
563}
564
565################################################################################
566#
567
568fib_test()
569{
570 if [ -n "$TEST" ]; then
571 eval $TEST
572 else
573 fib_unreg_test
574 fib_down_test
575 fib_carrier_test
576 fib_nexthop_test
577 fi
578}
579
580if [ "$(id -u)" -ne 0 ];then
581 echo "SKIP: Need root privileges"
582 exit 0
583fi
584
585if [ ! -x "$(command -v ip)" ]; then
586 echo "SKIP: Could not run test without ip tool"
587 exit 0
588fi
589
590ip route help 2>&1 | grep -q fibmatch
591if [ $? -ne 0 ]; then
592 echo "SKIP: iproute2 too old, missing fibmatch"
593 exit 0
594fi
595
596# start clean
597cleanup &> /dev/null
598
599fib_test
600
601exit $ret