1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# redirect test 5# 6# .253 +----+ 7# +----| r1 | 8# | +----+ 9# +----+ | |.1 10# | h1 |--------------+ | 10.1.1.0/30 2001:db8:1::0/126 11# +----+ .1 | |.2 12# 172.16.1/24 | +----+ +----+ 13# 2001:db8:16:1/64 +----| r2 |-------------------| h2 | 14# .254 +----+ .254 .2 +----+ 15# 172.16.2/24 16# 2001:db8:16:2/64 17# 18# Route from h1 to h2 goes through r1, eth1 - connection between r1 and r2. 19# Route on r1 changed to go to r2 via eth0. This causes a redirect to be sent 20# from r1 to h1 telling h1 to use r2 when talking to h2. 21 22VERBOSE=0 23PAUSE_ON_FAIL=no 24 25H1_N1_IP=172.16.1.1 26R1_N1_IP=172.16.1.253 27R2_N1_IP=172.16.1.254 28 29H1_N1_IP6=2001:db8:16:1::1 30R1_N1_IP6=2001:db8:16:1::253 31R2_N1_IP6=2001:db8:16:1::254 32 33R1_R2_N1_IP=10.1.1.1 34R2_R1_N1_IP=10.1.1.2 35 36R1_R2_N1_IP6=2001:db8:1::1 37R2_R1_N1_IP6=2001:db8:1::2 38 39H2_N2=172.16.2.0/24 40H2_N2_6=2001:db8:16:2::/64 41H2_N2_IP=172.16.2.2 42R2_N2_IP=172.16.2.254 43H2_N2_IP6=2001:db8:16:2::2 44R2_N2_IP6=2001:db8:16:2::254 45 46VRF=red 47VRF_TABLE=1111 48 49################################################################################ 50# helpers 51 52log_section() 53{ 54 echo 55 echo "###########################################################################" 56 echo "$*" 57 echo "###########################################################################" 58 echo 59} 60 61log_test() 62{ 63 local rc=$1 64 local expected=$2 65 local msg="$3" 66 local xfail=$4 67 68 if [ ${rc} -eq ${expected} ]; then 69 printf "TEST: %-60s [ OK ]\n" "${msg}" 70 nsuccess=$((nsuccess+1)) 71 elif [ ${rc} -eq ${xfail} ]; then 72 printf "TEST: %-60s [XFAIL]\n" "${msg}" 73 nxfail=$((nxfail+1)) 74 else 75 ret=1 76 nfail=$((nfail+1)) 77 printf "TEST: %-60s [FAIL]\n" "${msg}" 78 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then 79 echo 80 echo "hit enter to continue, 'q' to quit" 81 read a 82 [ "$a" = "q" ] && exit 1 83 fi 84 fi 85} 86 87log_debug() 88{ 89 if [ "$VERBOSE" = "1" ]; then 90 echo "$*" 91 fi 92} 93 94run_cmd() 95{ 96 local cmd="$*" 97 local out 98 local rc 99 100 if [ "$VERBOSE" = "1" ]; then 101 echo "COMMAND: $cmd" 102 fi 103 104 out=$(eval $cmd 2>&1) 105 rc=$? 106 if [ "$VERBOSE" = "1" -a -n "$out" ]; then 107 echo "$out" 108 fi 109 110 [ "$VERBOSE" = "1" ] && echo 111 112 return $rc 113} 114 115get_linklocal() 116{ 117 local ns=$1 118 local dev=$2 119 local addr 120 121 addr=$(ip -netns $ns -6 -br addr show dev ${dev} | \ 122 awk '{ 123 for (i = 3; i <= NF; ++i) { 124 if ($i ~ /^fe80/) 125 print $i 126 } 127 }' 128 ) 129 addr=${addr/\/*} 130 131 [ -z "$addr" ] && return 1 132 133 echo $addr 134 135 return 0 136} 137 138################################################################################ 139# setup and teardown 140 141cleanup() 142{ 143 local ns 144 145 for ns in h1 h2 r1 r2; do 146 ip netns del $ns 2>/dev/null 147 done 148} 149 150create_vrf() 151{ 152 local ns=$1 153 154 ip -netns ${ns} link add ${VRF} type vrf table ${VRF_TABLE} 155 ip -netns ${ns} link set ${VRF} up 156 ip -netns ${ns} route add vrf ${VRF} unreachable default metric 8192 157 ip -netns ${ns} -6 route add vrf ${VRF} unreachable default metric 8192 158 159 ip -netns ${ns} addr add 127.0.0.1/8 dev ${VRF} 160 ip -netns ${ns} -6 addr add ::1 dev ${VRF} nodad 161 162 ip -netns ${ns} ru del pref 0 163 ip -netns ${ns} ru add pref 32765 from all lookup local 164 ip -netns ${ns} -6 ru del pref 0 165 ip -netns ${ns} -6 ru add pref 32765 from all lookup local 166} 167 168setup() 169{ 170 local ns 171 172 # 173 # create nodes as namespaces 174 # 175 for ns in h1 h2 r1 r2; do 176 ip netns add $ns 177 ip -netns $ns li set lo up 178 179 case "${ns}" in 180 h[12]) ip netns exec $ns sysctl -q -w net.ipv4.conf.all.accept_redirects=1 181 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0 182 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.accept_redirects=1 183 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1 184 ;; 185 r[12]) ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1 186 ip netns exec $ns sysctl -q -w net.ipv4.conf.all.send_redirects=1 187 ip netns exec $ns sysctl -q -w net.ipv4.conf.default.rp_filter=0 188 ip netns exec $ns sysctl -q -w net.ipv4.conf.all.rp_filter=0 189 190 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1 191 ip netns exec $ns sysctl -q -w net.ipv6.route.mtu_expires=10 192 esac 193 done 194 195 # 196 # create interconnects 197 # 198 ip -netns h1 li add eth0 type veth peer name r1h1 199 ip -netns h1 li set r1h1 netns r1 name eth0 up 200 201 ip -netns h1 li add eth1 type veth peer name r2h1 202 ip -netns h1 li set r2h1 netns r2 name eth0 up 203 204 ip -netns h2 li add eth0 type veth peer name r2h2 205 ip -netns h2 li set eth0 up 206 ip -netns h2 li set r2h2 netns r2 name eth2 up 207 208 ip -netns r1 li add eth1 type veth peer name r2r1 209 ip -netns r1 li set eth1 up 210 ip -netns r1 li set r2r1 netns r2 name eth1 up 211 212 # 213 # h1 214 # 215 if [ "${WITH_VRF}" = "yes" ]; then 216 create_vrf "h1" 217 H1_VRF_ARG="vrf ${VRF}" 218 H1_PING_ARG="-I ${VRF}" 219 else 220 H1_VRF_ARG= 221 H1_PING_ARG= 222 fi 223 ip -netns h1 li add br0 type bridge 224 if [ "${WITH_VRF}" = "yes" ]; then 225 ip -netns h1 li set br0 vrf ${VRF} up 226 else 227 ip -netns h1 li set br0 up 228 fi 229 ip -netns h1 addr add dev br0 ${H1_N1_IP}/24 230 ip -netns h1 -6 addr add dev br0 ${H1_N1_IP6}/64 nodad 231 ip -netns h1 li set eth0 master br0 up 232 ip -netns h1 li set eth1 master br0 up 233 234 # 235 # h2 236 # 237 ip -netns h2 addr add dev eth0 ${H2_N2_IP}/24 238 ip -netns h2 ro add default via ${R2_N2_IP} dev eth0 239 ip -netns h2 -6 addr add dev eth0 ${H2_N2_IP6}/64 nodad 240 ip -netns h2 -6 ro add default via ${R2_N2_IP6} dev eth0 241 242 # 243 # r1 244 # 245 ip -netns r1 addr add dev eth0 ${R1_N1_IP}/24 246 ip -netns r1 -6 addr add dev eth0 ${R1_N1_IP6}/64 nodad 247 ip -netns r1 addr add dev eth1 ${R1_R2_N1_IP}/30 248 ip -netns r1 -6 addr add dev eth1 ${R1_R2_N1_IP6}/126 nodad 249 250 # 251 # r2 252 # 253 ip -netns r2 addr add dev eth0 ${R2_N1_IP}/24 254 ip -netns r2 -6 addr add dev eth0 ${R2_N1_IP6}/64 nodad 255 ip -netns r2 addr add dev eth1 ${R2_R1_N1_IP}/30 256 ip -netns r2 -6 addr add dev eth1 ${R2_R1_N1_IP6}/126 nodad 257 ip -netns r2 addr add dev eth2 ${R2_N2_IP}/24 258 ip -netns r2 -6 addr add dev eth2 ${R2_N2_IP6}/64 nodad 259 260 sleep 2 261 262 R1_LLADDR=$(get_linklocal r1 eth0) 263 if [ $? -ne 0 ]; then 264 echo "Error: Failed to get link-local address of r1's eth0" 265 exit 1 266 fi 267 log_debug "initial gateway is R1's lladdr = ${R1_LLADDR}" 268 269 R2_LLADDR=$(get_linklocal r2 eth0) 270 if [ $? -ne 0 ]; then 271 echo "Error: Failed to get link-local address of r2's eth0" 272 exit 1 273 fi 274 log_debug "initial gateway is R2's lladdr = ${R2_LLADDR}" 275} 276 277change_h2_mtu() 278{ 279 local mtu=$1 280 281 run_cmd ip -netns h2 li set eth0 mtu ${mtu} 282 run_cmd ip -netns r2 li set eth2 mtu ${mtu} 283} 284 285check_exception() 286{ 287 local mtu="$1" 288 local with_redirect="$2" 289 local desc="$3" 290 291 # From 172.16.1.101: icmp_seq=1 Redirect Host(New nexthop: 172.16.1.102) 292 if [ "$VERBOSE" = "1" ]; then 293 echo "Commands to check for exception:" 294 run_cmd ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} 295 run_cmd ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} 296 fi 297 298 if [ -n "${mtu}" ]; then 299 mtu=" mtu ${mtu}" 300 fi 301 if [ "$with_redirect" = "yes" ]; then 302 ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \ 303 grep -q "cache <redirected> expires [0-9]*sec${mtu}" 304 elif [ -n "${mtu}" ]; then 305 ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \ 306 grep -q "cache expires [0-9]*sec${mtu}" 307 else 308 # want to verify that neither mtu nor redirected appears in 309 # the route get output. The -v will wipe out the cache line 310 # if either are set so the last grep -q will not find a match 311 ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \ 312 grep -E -v 'mtu|redirected' | grep -q "cache" 313 fi 314 log_test $? 0 "IPv4: ${desc}" 315 316 if [ "$with_redirect" = "yes" ]; then 317 ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \ 318 grep -q "${H2_N2_IP6} from :: via ${R2_LLADDR} dev br0.*${mtu}" 319 elif [ -n "${mtu}" ]; then 320 ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \ 321 grep -q "${mtu}" 322 else 323 # IPv6 is a bit harder. First strip out the match if it 324 # contains an mtu exception and then look for the first 325 # gateway - R1's lladdr 326 ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \ 327 grep -v "mtu" | grep -q "${R1_LLADDR}" 328 fi 329 log_test $? 0 "IPv6: ${desc}" 1 330} 331 332run_ping() 333{ 334 local sz=$1 335 336 run_cmd ip netns exec h1 ping -q -M want -i 0.5 -c 10 -w 2 -s ${sz} ${H1_PING_ARG} ${H2_N2_IP} 337 run_cmd ip netns exec h1 ${ping6} -q -M want -i 0.5 -c 10 -w 2 -s ${sz} ${H1_PING_ARG} ${H2_N2_IP6} 338} 339 340replace_route_new() 341{ 342 # r1 to h2 via r2 and eth0 343 run_cmd ip -netns r1 nexthop replace id 1 via ${R2_N1_IP} dev eth0 344 run_cmd ip -netns r1 nexthop replace id 2 via ${R2_LLADDR} dev eth0 345} 346 347reset_route_new() 348{ 349 run_cmd ip -netns r1 nexthop flush 350 run_cmd ip -netns h1 nexthop flush 351 352 initial_route_new 353} 354 355initial_route_new() 356{ 357 # r1 to h2 via r2 and eth1 358 run_cmd ip -netns r1 nexthop add id 1 via ${R2_R1_N1_IP} dev eth1 359 run_cmd ip -netns r1 ro add ${H2_N2} nhid 1 360 361 run_cmd ip -netns r1 nexthop add id 2 via ${R2_R1_N1_IP6} dev eth1 362 run_cmd ip -netns r1 -6 ro add ${H2_N2_6} nhid 2 363 364 # h1 to h2 via r1 365 run_cmd ip -netns h1 nexthop add id 1 via ${R1_N1_IP} dev br0 366 run_cmd ip -netns h1 ro add ${H1_VRF_ARG} ${H2_N2} nhid 1 367 368 run_cmd ip -netns h1 nexthop add id 2 via ${R1_LLADDR} dev br0 369 run_cmd ip -netns h1 -6 ro add ${H1_VRF_ARG} ${H2_N2_6} nhid 2 370} 371 372replace_route_legacy() 373{ 374 # r1 to h2 via r2 and eth0 375 run_cmd ip -netns r1 ro replace ${H2_N2} via ${R2_N1_IP} dev eth0 376 run_cmd ip -netns r1 -6 ro replace ${H2_N2_6} via ${R2_LLADDR} dev eth0 377} 378 379reset_route_legacy() 380{ 381 run_cmd ip -netns r1 ro del ${H2_N2} 382 run_cmd ip -netns r1 -6 ro del ${H2_N2_6} 383 384 run_cmd ip -netns h1 ro del ${H1_VRF_ARG} ${H2_N2} 385 run_cmd ip -netns h1 -6 ro del ${H1_VRF_ARG} ${H2_N2_6} 386 387 initial_route_legacy 388} 389 390initial_route_legacy() 391{ 392 # r1 to h2 via r2 and eth1 393 run_cmd ip -netns r1 ro add ${H2_N2} via ${R2_R1_N1_IP} dev eth1 394 run_cmd ip -netns r1 -6 ro add ${H2_N2_6} via ${R2_R1_N1_IP6} dev eth1 395 396 # h1 to h2 via r1 397 # - IPv6 redirect only works if gateway is the LLA 398 run_cmd ip -netns h1 ro add ${H1_VRF_ARG} ${H2_N2} via ${R1_N1_IP} dev br0 399 run_cmd ip -netns h1 -6 ro add ${H1_VRF_ARG} ${H2_N2_6} via ${R1_LLADDR} dev br0 400} 401 402check_connectivity() 403{ 404 local rc 405 406 run_cmd ip netns exec h1 ping -c1 -w1 ${H1_PING_ARG} ${H2_N2_IP} 407 rc=$? 408 run_cmd ip netns exec h1 ${ping6} -c1 -w1 ${H1_PING_ARG} ${H2_N2_IP6} 409 [ $? -ne 0 ] && rc=$? 410 411 return $rc 412} 413 414do_test() 415{ 416 local ttype="$1" 417 418 eval initial_route_${ttype} 419 420 # verify connectivity 421 check_connectivity 422 if [ $? -ne 0 ]; then 423 echo "Error: Basic connectivity is broken" 424 ret=1 425 return 426 fi 427 428 # redirect exception followed by mtu 429 eval replace_route_${ttype} 430 run_ping 64 431 check_exception "" "yes" "redirect exception" 432 433 check_connectivity 434 if [ $? -ne 0 ]; then 435 echo "Error: Basic connectivity is broken after redirect" 436 ret=1 437 return 438 fi 439 440 change_h2_mtu 1300 441 run_ping 1350 442 check_exception "1300" "yes" "redirect exception plus mtu" 443 444 # remove exceptions and restore routing 445 change_h2_mtu 1500 446 eval reset_route_${ttype} 447 448 check_connectivity 449 if [ $? -ne 0 ]; then 450 echo "Error: Basic connectivity is broken after reset" 451 ret=1 452 return 453 fi 454 check_exception "" "no" "routing reset" 455 456 # MTU exception followed by redirect 457 change_h2_mtu 1300 458 run_ping 1350 459 check_exception "1300" "no" "mtu exception" 460 461 eval replace_route_${ttype} 462 run_ping 64 463 check_exception "1300" "yes" "mtu exception plus redirect" 464 465 check_connectivity 466 if [ $? -ne 0 ]; then 467 echo "Error: Basic connectivity is broken after redirect" 468 ret=1 469 return 470 fi 471} 472 473################################################################################ 474# usage 475 476usage() 477{ 478 cat <<EOF 479usage: ${0##*/} OPTS 480 481 -p Pause on fail 482 -v verbose mode (show commands and output) 483EOF 484} 485 486################################################################################ 487# main 488 489# Some systems don't have a ping6 binary anymore 490which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping) 491 492ret=0 493nsuccess=0 494nfail=0 495nxfail=0 496 497while getopts :pv o 498do 499 case $o in 500 p) PAUSE_ON_FAIL=yes;; 501 v) VERBOSE=$(($VERBOSE + 1));; 502 *) usage; exit 1;; 503 esac 504done 505 506trap cleanup EXIT 507 508cleanup 509WITH_VRF=no 510setup 511 512log_section "Legacy routing" 513do_test "legacy" 514 515cleanup 516log_section "Legacy routing with VRF" 517WITH_VRF=yes 518setup 519do_test "legacy" 520 521cleanup 522log_section "Routing with nexthop objects" 523ip nexthop ls >/dev/null 2>&1 524if [ $? -eq 0 ]; then 525 WITH_VRF=no 526 setup 527 do_test "new" 528 529 cleanup 530 log_section "Routing with nexthop objects and VRF" 531 WITH_VRF=yes 532 setup 533 do_test "new" 534else 535 echo "Nexthop objects not supported; skipping tests" 536fi 537 538printf "\nTests passed: %3d\n" ${nsuccess} 539printf "Tests failed: %3d\n" ${nfail} 540printf "Tests xfailed: %3d\n" ${nxfail} 541 542exit $ret 543