313 lines · bash
1#!/bin/bash2# SPDX-License-Identifier: GPL-2.03#4# Run traceroute/traceroute6 tests5#6 7source lib.sh8VERBOSE=09PAUSE_ON_FAIL=no10 11################################################################################12#13log_test()14{15 local rc=$116 local expected=$217 local msg="$3"18 19 if [ ${rc} -eq ${expected} ]; then20 printf "TEST: %-60s [ OK ]\n" "${msg}"21 nsuccess=$((nsuccess+1))22 else23 ret=124 nfail=$((nfail+1))25 printf "TEST: %-60s [FAIL]\n" "${msg}"26 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then27 echo28 echo "hit enter to continue, 'q' to quit"29 read a30 [ "$a" = "q" ] && exit 131 fi32 fi33}34 35run_cmd()36{37 local ns38 local cmd39 local out40 local rc41 42 ns="$1"43 shift44 cmd="$*"45 46 if [ "$VERBOSE" = "1" ]; then47 printf " COMMAND: $cmd\n"48 fi49 50 out=$(eval ip netns exec ${ns} ${cmd} 2>&1)51 rc=$?52 if [ "$VERBOSE" = "1" -a -n "$out" ]; then53 echo " $out"54 fi55 56 [ "$VERBOSE" = "1" ] && echo57 58 return $rc59}60 61################################################################################62# create namespaces and interconnects63 64create_ns()65{66 local ns=$167 local addr=$268 local addr6=$369 70 [ -z "${addr}" ] && addr="-"71 [ -z "${addr6}" ] && addr6="-"72 73 if [ "${addr}" != "-" ]; then74 ip netns exec ${ns} ip addr add dev lo ${addr}75 fi76 if [ "${addr6}" != "-" ]; then77 ip netns exec ${ns} ip -6 addr add dev lo ${addr6}78 fi79 80 ip netns exec ${ns} ip ro add unreachable default metric 819281 ip netns exec ${ns} ip -6 ro add unreachable default metric 819282 83 ip netns exec ${ns} sysctl -qw net.ipv4.ip_forward=184 ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.keep_addr_on_down=185 ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.forwarding=186 ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.forwarding=187 ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.accept_dad=088}89 90# create veth pair to connect namespaces and apply addresses.91connect_ns()92{93 local ns1=$194 local ns1_dev=$295 local ns1_addr=$396 local ns1_addr6=$497 local ns2=$598 local ns2_dev=$699 local ns2_addr=$7100 local ns2_addr6=$8101 102 ip netns exec ${ns1} ip li add ${ns1_dev} type veth peer name tmp103 ip netns exec ${ns1} ip li set ${ns1_dev} up104 ip netns exec ${ns1} ip li set tmp netns ${ns2} name ${ns2_dev}105 ip netns exec ${ns2} ip li set ${ns2_dev} up106 107 if [ "${ns1_addr}" != "-" ]; then108 ip netns exec ${ns1} ip addr add dev ${ns1_dev} ${ns1_addr}109 fi110 111 if [ "${ns2_addr}" != "-" ]; then112 ip netns exec ${ns2} ip addr add dev ${ns2_dev} ${ns2_addr}113 fi114 115 if [ "${ns1_addr6}" != "-" ]; then116 ip netns exec ${ns1} ip addr add dev ${ns1_dev} ${ns1_addr6}117 fi118 119 if [ "${ns2_addr6}" != "-" ]; then120 ip netns exec ${ns2} ip addr add dev ${ns2_dev} ${ns2_addr6}121 fi122}123 124################################################################################125# traceroute6 test126#127# Verify that in this scenario128#129# ------------------------ N2130# | |131# ------ ------ N3 ----132# | R1 | | R2 |------|H2|133# ------ ------ ----134# | |135# ------------------------ N1136# |137# ----138# |H1|139# ----140#141# where H1's default route goes through R1 and R1's default route goes142# through R2 over N2, traceroute6 from H1 to H2 reports R2's address143# on N2 and not N1.144#145# Addresses are assigned as follows:146#147# N1: 2000:101::/64148# N2: 2000:102::/64149# N3: 2000:103::/64150#151# R1's host part of address: 1152# R2's host part of address: 2153# H1's host part of address: 3154# H2's host part of address: 4155#156# For example:157# the IPv6 address of R1's interface on N2 is 2000:102::1/64158 159cleanup_traceroute6()160{161 cleanup_ns $h1 $h2 $r1 $r2162}163 164setup_traceroute6()165{166 brdev=br0167 168 # start clean169 cleanup_traceroute6170 171 set -e172 setup_ns h1 h2 r1 r2173 create_ns $h1174 create_ns $h2175 create_ns $r1176 create_ns $r2177 178 # Setup N3179 connect_ns $r2 eth3 - 2000:103::2/64 $h2 eth3 - 2000:103::4/64180 ip netns exec $h2 ip route add default via 2000:103::2181 182 # Setup N2183 connect_ns $r1 eth2 - 2000:102::1/64 $r2 eth2 - 2000:102::2/64184 ip netns exec $r1 ip route add default via 2000:102::2185 186 # Setup N1. host-1 and router-2 connect to a bridge in router-1.187 ip netns exec $r1 ip link add name ${brdev} type bridge188 ip netns exec $r1 ip link set ${brdev} up189 ip netns exec $r1 ip addr add 2000:101::1/64 dev ${brdev}190 191 connect_ns $h1 eth0 - 2000:101::3/64 $r1 eth0 - -192 ip netns exec $r1 ip link set dev eth0 master ${brdev}193 ip netns exec $h1 ip route add default via 2000:101::1194 195 connect_ns $r2 eth1 - 2000:101::2/64 $r1 eth1 - -196 ip netns exec $r1 ip link set dev eth1 master ${brdev}197 198 # Prime the network199 ip netns exec $h1 ping6 -c5 2000:103::4 >/dev/null 2>&1200 201 set +e202}203 204run_traceroute6()205{206 if [ ! -x "$(command -v traceroute6)" ]; then207 echo "SKIP: Could not run IPV6 test without traceroute6"208 return209 fi210 211 setup_traceroute6212 213 # traceroute6 host-2 from host-1 (expects 2000:102::2)214 run_cmd $h1 "traceroute6 2000:103::4 | grep -q 2000:102::2"215 log_test $? 0 "IPV6 traceroute"216 217 cleanup_traceroute6218}219 220################################################################################221# traceroute test222#223# Verify that traceroute from H1 to H2 shows 1.0.1.1 in this scenario224#225# 1.0.3.1/24226# ---- 1.0.1.3/24 1.0.1.1/24 ---- 1.0.2.1/24 1.0.2.4/24 ----227# |H1|--------------------------|R1|--------------------------|H2|228# ---- N1 ---- N2 ----229#230# where net.ipv4.icmp_errors_use_inbound_ifaddr is set on R1 and231# 1.0.3.1/24 and 1.0.1.1/24 are respectively R1's primary and secondary232# address on N1.233#234 235cleanup_traceroute()236{237 cleanup_ns $h1 $h2 $router238}239 240setup_traceroute()241{242 # start clean243 cleanup_traceroute244 245 set -e246 setup_ns h1 h2 router247 create_ns $h1248 create_ns $h2249 create_ns $router250 251 connect_ns $h1 eth0 1.0.1.3/24 - \252 $router eth1 1.0.3.1/24 -253 ip netns exec $h1 ip route add default via 1.0.1.1254 255 ip netns exec $router ip addr add 1.0.1.1/24 dev eth1256 ip netns exec $router sysctl -qw \257 net.ipv4.icmp_errors_use_inbound_ifaddr=1258 259 connect_ns $h2 eth0 1.0.2.4/24 - \260 $router eth2 1.0.2.1/24 -261 ip netns exec $h2 ip route add default via 1.0.2.1262 263 # Prime the network264 ip netns exec $h1 ping -c5 1.0.2.4 >/dev/null 2>&1265 266 set +e267}268 269run_traceroute()270{271 if [ ! -x "$(command -v traceroute)" ]; then272 echo "SKIP: Could not run IPV4 test without traceroute"273 return274 fi275 276 setup_traceroute277 278 # traceroute host-2 from host-1 (expects 1.0.1.1). Takes a while.279 run_cmd $h1 "traceroute 1.0.2.4 | grep -q 1.0.1.1"280 log_test $? 0 "IPV4 traceroute"281 282 cleanup_traceroute283}284 285################################################################################286# Run tests287 288run_tests()289{290 run_traceroute6291 run_traceroute292}293 294################################################################################295# main296 297declare -i nfail=0298declare -i nsuccess=0299 300while getopts :pv o301do302 case $o in303 p) PAUSE_ON_FAIL=yes;;304 v) VERBOSE=$(($VERBOSE + 1));;305 *) exit 1;;306 esac307done308 309run_tests310 311printf "\nTests passed: %3d\n" ${nsuccess}312printf "Tests failed: %3d\n" ${nfail}313