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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 | #!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # L2TPv3 tunnel between 2 hosts # # host-1 | router | host-2 # | | # lo l2tp | | l2tp lo # 172.16.101.1 172.16.1.1 | | 172.16.1.2 172.16.101.2 # fc00:101::1 fc00:1::1 | | fc00:1::2 fc00:101::2 # | | # eth0 | | eth0 # 10.1.1.1 | | 10.1.2.1 # 2001:db8:1::1 | | 2001:db8:2::1 VERBOSE=0 PAUSE_ON_FAIL=no which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping) ################################################################################ # log_test() { local rc=$1 local expected=$2 local msg="$3" if [ ${rc} -eq ${expected} ]; then printf "TEST: %-60s [ OK ]\n" "${msg}" nsuccess=$((nsuccess+1)) else ret=1 nfail=$((nfail+1)) printf "TEST: %-60s [FAIL]\n" "${msg}" if [ "${PAUSE_ON_FAIL}" = "yes" ]; then echo echo "hit enter to continue, 'q' to quit" read a [ "$a" = "q" ] && exit 1 fi fi } run_cmd() { local ns local cmd local out local rc ns="$1" shift cmd="$*" if [ "$VERBOSE" = "1" ]; then printf " COMMAND: $cmd\n" fi out=$(eval ip netns exec ${ns} ${cmd} 2>&1) rc=$? if [ "$VERBOSE" = "1" -a -n "$out" ]; then echo " $out" fi [ "$VERBOSE" = "1" ] && echo return $rc } ################################################################################ # create namespaces and interconnects create_ns() { local ns=$1 local addr=$2 local addr6=$3 [ -z "${addr}" ] && addr="-" [ -z "${addr6}" ] && addr6="-" ip netns add ${ns} ip -netns ${ns} link set lo up if [ "${addr}" != "-" ]; then ip -netns ${ns} addr add dev lo ${addr} fi if [ "${addr6}" != "-" ]; then ip -netns ${ns} -6 addr add dev lo ${addr6} fi ip -netns ${ns} ro add unreachable default metric 8192 ip -netns ${ns} -6 ro add unreachable default metric 8192 ip netns exec ${ns} sysctl -qw net.ipv4.ip_forward=1 ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1 ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.forwarding=1 ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.forwarding=1 ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.accept_dad=0 } # create veth pair to connect namespaces and apply addresses. connect_ns() { local ns1=$1 local ns1_dev=$2 local ns1_addr=$3 local ns1_addr6=$4 local ns2=$5 local ns2_dev=$6 local ns2_addr=$7 local ns2_addr6=$8 ip -netns ${ns1} li add ${ns1_dev} type veth peer name tmp ip -netns ${ns1} li set ${ns1_dev} up ip -netns ${ns1} li set tmp netns ${ns2} name ${ns2_dev} ip -netns ${ns2} li set ${ns2_dev} up if [ "${ns1_addr}" != "-" ]; then ip -netns ${ns1} addr add dev ${ns1_dev} ${ns1_addr} ip -netns ${ns2} addr add dev ${ns2_dev} ${ns2_addr} fi if [ "${ns1_addr6}" != "-" ]; then ip -netns ${ns1} addr add dev ${ns1_dev} ${ns1_addr6} ip -netns ${ns2} addr add dev ${ns2_dev} ${ns2_addr6} fi } ################################################################################ # test setup cleanup() { local ns for ns in host-1 host-2 router do ip netns del ${ns} 2>/dev/null done } setup_l2tp_ipv4() { # # configure l2tpv3 tunnel on host-1 # ip -netns host-1 l2tp add tunnel tunnel_id 1041 peer_tunnel_id 1042 \ encap ip local 10.1.1.1 remote 10.1.2.1 ip -netns host-1 l2tp add session name l2tp4 tunnel_id 1041 \ session_id 1041 peer_session_id 1042 ip -netns host-1 link set dev l2tp4 up ip -netns host-1 addr add dev l2tp4 172.16.1.1 peer 172.16.1.2 # # configure l2tpv3 tunnel on host-2 # ip -netns host-2 l2tp add tunnel tunnel_id 1042 peer_tunnel_id 1041 \ encap ip local 10.1.2.1 remote 10.1.1.1 ip -netns host-2 l2tp add session name l2tp4 tunnel_id 1042 \ session_id 1042 peer_session_id 1041 ip -netns host-2 link set dev l2tp4 up ip -netns host-2 addr add dev l2tp4 172.16.1.2 peer 172.16.1.1 # # add routes to loopback addresses # ip -netns host-1 ro add 172.16.101.2/32 via 172.16.1.2 ip -netns host-2 ro add 172.16.101.1/32 via 172.16.1.1 } setup_l2tp_ipv6() { # # configure l2tpv3 tunnel on host-1 # ip -netns host-1 l2tp add tunnel tunnel_id 1061 peer_tunnel_id 1062 \ encap ip local 2001:db8:1::1 remote 2001:db8:2::1 ip -netns host-1 l2tp add session name l2tp6 tunnel_id 1061 \ session_id 1061 peer_session_id 1062 ip -netns host-1 link set dev l2tp6 up ip -netns host-1 addr add dev l2tp6 fc00:1::1 peer fc00:1::2 # # configure l2tpv3 tunnel on host-2 # ip -netns host-2 l2tp add tunnel tunnel_id 1062 peer_tunnel_id 1061 \ encap ip local 2001:db8:2::1 remote 2001:db8:1::1 ip -netns host-2 l2tp add session name l2tp6 tunnel_id 1062 \ session_id 1062 peer_session_id 1061 ip -netns host-2 link set dev l2tp6 up ip -netns host-2 addr add dev l2tp6 fc00:1::2 peer fc00:1::1 # # add routes to loopback addresses # ip -netns host-1 -6 ro add fc00:101::2/128 via fc00:1::2 ip -netns host-2 -6 ro add fc00:101::1/128 via fc00:1::1 } setup() { # start clean cleanup set -e create_ns host-1 172.16.101.1/32 fc00:101::1/128 create_ns host-2 172.16.101.2/32 fc00:101::2/128 create_ns router connect_ns host-1 eth0 10.1.1.1/24 2001:db8:1::1/64 \ router eth1 10.1.1.2/24 2001:db8:1::2/64 connect_ns host-2 eth0 10.1.2.1/24 2001:db8:2::1/64 \ router eth2 10.1.2.2/24 2001:db8:2::2/64 ip -netns host-1 ro add 10.1.2.0/24 via 10.1.1.2 ip -netns host-1 -6 ro add 2001:db8:2::/64 via 2001:db8:1::2 ip -netns host-2 ro add 10.1.1.0/24 via 10.1.2.2 ip -netns host-2 -6 ro add 2001:db8:1::/64 via 2001:db8:2::2 setup_l2tp_ipv4 setup_l2tp_ipv6 set +e } setup_ipsec() { # # IPv4 # run_cmd host-1 ip xfrm policy add \ src 10.1.1.1 dst 10.1.2.1 dir out \ tmpl proto esp mode transport run_cmd host-1 ip xfrm policy add \ src 10.1.2.1 dst 10.1.1.1 dir in \ tmpl proto esp mode transport run_cmd host-2 ip xfrm policy add \ src 10.1.1.1 dst 10.1.2.1 dir in \ tmpl proto esp mode transport run_cmd host-2 ip xfrm policy add \ src 10.1.2.1 dst 10.1.1.1 dir out \ tmpl proto esp mode transport ip -netns host-1 xfrm state add \ src 10.1.1.1 dst 10.1.2.1 \ spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \ 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport ip -netns host-1 xfrm state add \ src 10.1.2.1 dst 10.1.1.1 \ spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \ 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport ip -netns host-2 xfrm state add \ src 10.1.1.1 dst 10.1.2.1 \ spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \ 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport ip -netns host-2 xfrm state add \ src 10.1.2.1 dst 10.1.1.1 \ spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \ 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport # # IPV6 # run_cmd host-1 ip -6 xfrm policy add \ src 2001:db8:1::1 dst 2001:db8:2::1 dir out \ tmpl proto esp mode transport run_cmd host-1 ip -6 xfrm policy add \ src 2001:db8:2::1 dst 2001:db8:1::1 dir in \ tmpl proto esp mode transport run_cmd host-2 ip -6 xfrm policy add \ src 2001:db8:1::1 dst 2001:db8:2::1 dir in \ tmpl proto esp mode transport run_cmd host-2 ip -6 xfrm policy add \ src 2001:db8:2::1 dst 2001:db8:1::1 dir out \ tmpl proto esp mode transport ip -netns host-1 -6 xfrm state add \ src 2001:db8:1::1 dst 2001:db8:2::1 \ spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \ 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport ip -netns host-1 -6 xfrm state add \ src 2001:db8:2::1 dst 2001:db8:1::1 \ spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \ 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport ip -netns host-2 -6 xfrm state add \ src 2001:db8:1::1 dst 2001:db8:2::1 \ spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \ 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport ip -netns host-2 -6 xfrm state add \ src 2001:db8:2::1 dst 2001:db8:1::1 \ spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \ 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport } teardown_ipsec() { run_cmd host-1 ip xfrm state flush run_cmd host-1 ip xfrm policy flush run_cmd host-2 ip xfrm state flush run_cmd host-2 ip xfrm policy flush } ################################################################################ # generate traffic through tunnel for various cases run_ping() { local desc="$1" run_cmd host-1 ping -c1 -w1 172.16.1.2 log_test $? 0 "IPv4 basic L2TP tunnel ${desc}" run_cmd host-1 ping -c1 -w1 -I 172.16.101.1 172.16.101.2 log_test $? 0 "IPv4 route through L2TP tunnel ${desc}" run_cmd host-1 ${ping6} -c1 -w1 fc00:1::2 log_test $? 0 "IPv6 basic L2TP tunnel ${desc}" run_cmd host-1 ${ping6} -c1 -w1 -I fc00:101::1 fc00:101::2 log_test $? 0 "IPv6 route through L2TP tunnel ${desc}" } run_tests() { local desc setup run_ping setup_ipsec run_ping "- with IPsec" run_cmd host-1 ping -c1 -w1 172.16.1.2 log_test $? 0 "IPv4 basic L2TP tunnel ${desc}" run_cmd host-1 ping -c1 -w1 -I 172.16.101.1 172.16.101.2 log_test $? 0 "IPv4 route through L2TP tunnel ${desc}" run_cmd host-1 ${ping6} -c1 -w1 fc00:1::2 log_test $? 0 "IPv6 basic L2TP tunnel - with IPsec" run_cmd host-1 ${ping6} -c1 -w1 -I fc00:101::1 fc00:101::2 log_test $? 0 "IPv6 route through L2TP tunnel - with IPsec" teardown_ipsec run_ping "- after IPsec teardown" } ################################################################################ # main declare -i nfail=0 declare -i nsuccess=0 while getopts :pv o do case $o in p) PAUSE_ON_FAIL=yes;; v) VERBOSE=$(($VERBOSE + 1));; *) exit 1;; esac done run_tests cleanup printf "\nTests passed: %3d\n" ${nsuccess} printf "Tests failed: %3d\n" ${nfail} |