diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/net/icmp_redirect.sh | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/net/icmp_redirect.sh')
-rwxr-xr-x | tools/testing/selftests/net/icmp_redirect.sh | 537 |
1 files changed, 537 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/icmp_redirect.sh b/tools/testing/selftests/net/icmp_redirect.sh new file mode 100755 index 000000000..104a7a5f1 --- /dev/null +++ b/tools/testing/selftests/net/icmp_redirect.sh @@ -0,0 +1,537 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# redirect test +# +# .253 +----+ +# +----| r1 | +# | +----+ +# +----+ | |.1 +# | h1 |--------------+ | 10.1.1.0/30 2001:db8:1::0/126 +# +----+ .1 | |.2 +# 172.16.1/24 | +----+ +----+ +# 2001:db8:16:1/64 +----| r2 |-------------------| h2 | +# .254 +----+ .254 .2 +----+ +# 172.16.2/24 +# 2001:db8:16:2/64 +# +# Route from h1 to h2 goes through r1, eth1 - connection between r1 and r2. +# Route on r1 changed to go to r2 via eth0. This causes a redirect to be sent +# from r1 to h1 telling h1 to use r2 when talking to h2. + +VERBOSE=0 +PAUSE_ON_FAIL=no + +H1_N1_IP=172.16.1.1 +R1_N1_IP=172.16.1.253 +R2_N1_IP=172.16.1.254 + +H1_N1_IP6=2001:db8:16:1::1 +R1_N1_IP6=2001:db8:16:1::253 +R2_N1_IP6=2001:db8:16:1::254 + +R1_R2_N1_IP=10.1.1.1 +R2_R1_N1_IP=10.1.1.2 + +R1_R2_N1_IP6=2001:db8:1::1 +R2_R1_N1_IP6=2001:db8:1::2 + +H2_N2=172.16.2.0/24 +H2_N2_6=2001:db8:16:2::/64 +H2_N2_IP=172.16.2.2 +R2_N2_IP=172.16.2.254 +H2_N2_IP6=2001:db8:16:2::2 +R2_N2_IP6=2001:db8:16:2::254 + +VRF=red +VRF_TABLE=1111 + +################################################################################ +# helpers + +log_section() +{ + echo + echo "###########################################################################" + echo "$*" + echo "###########################################################################" + echo +} + +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 + [ "$a" = "q" ] && exit 1 + fi + fi +} + +log_debug() +{ + if [ "$VERBOSE" = "1" ]; then + echo "$*" + fi +} + +run_cmd() +{ + local cmd="$*" + local out + local rc + + if [ "$VERBOSE" = "1" ]; then + echo "COMMAND: $cmd" + fi + + out=$(eval $cmd 2>&1) + rc=$? + if [ "$VERBOSE" = "1" -a -n "$out" ]; then + echo "$out" + fi + + [ "$VERBOSE" = "1" ] && echo + + return $rc +} + +get_linklocal() +{ + local ns=$1 + local dev=$2 + local addr + + addr=$(ip -netns $ns -6 -br addr show dev ${dev} | \ + awk '{ + for (i = 3; i <= NF; ++i) { + if ($i ~ /^fe80/) + print $i + } + }' + ) + addr=${addr/\/*} + + [ -z "$addr" ] && return 1 + + echo $addr + + return 0 +} + +################################################################################ +# setup and teardown + +cleanup() +{ + local ns + + for ns in h1 h2 r1 r2; do + ip netns del $ns 2>/dev/null + done +} + +create_vrf() +{ + local ns=$1 + + ip -netns ${ns} link add ${VRF} type vrf table ${VRF_TABLE} + ip -netns ${ns} link set ${VRF} up + ip -netns ${ns} route add vrf ${VRF} unreachable default metric 8192 + ip -netns ${ns} -6 route add vrf ${VRF} unreachable default metric 8192 + + ip -netns ${ns} addr add 127.0.0.1/8 dev ${VRF} + ip -netns ${ns} -6 addr add ::1 dev ${VRF} nodad + + ip -netns ${ns} ru del pref 0 + ip -netns ${ns} ru add pref 32765 from all lookup local + ip -netns ${ns} -6 ru del pref 0 + ip -netns ${ns} -6 ru add pref 32765 from all lookup local +} + +setup() +{ + local ns + + # + # create nodes as namespaces + # + for ns in h1 h2 r1 r2; do + ip netns add $ns + ip -netns $ns li set lo up + + case "${ns}" in + h[12]) ip netns exec $ns sysctl -q -w net.ipv4.conf.all.accept_redirects=1 + ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0 + ip netns exec $ns sysctl -q -w net.ipv6.conf.all.accept_redirects=1 + ip netns exec $ns sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1 + ;; + r[12]) ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1 + ip netns exec $ns sysctl -q -w net.ipv4.conf.all.send_redirects=1 + ip netns exec $ns sysctl -q -w net.ipv4.conf.default.rp_filter=0 + ip netns exec $ns sysctl -q -w net.ipv4.conf.all.rp_filter=0 + + ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1 + ip netns exec $ns sysctl -q -w net.ipv6.route.mtu_expires=10 + esac + done + + # + # create interconnects + # + ip -netns h1 li add eth0 type veth peer name r1h1 + ip -netns h1 li set r1h1 netns r1 name eth0 up + + ip -netns h1 li add eth1 type veth peer name r2h1 + ip -netns h1 li set r2h1 netns r2 name eth0 up + + ip -netns h2 li add eth0 type veth peer name r2h2 + ip -netns h2 li set eth0 up + ip -netns h2 li set r2h2 netns r2 name eth2 up + + ip -netns r1 li add eth1 type veth peer name r2r1 + ip -netns r1 li set eth1 up + ip -netns r1 li set r2r1 netns r2 name eth1 up + + # + # h1 + # + if [ "${WITH_VRF}" = "yes" ]; then + create_vrf "h1" + H1_VRF_ARG="vrf ${VRF}" + H1_PING_ARG="-I ${VRF}" + else + H1_VRF_ARG= + H1_PING_ARG= + fi + ip -netns h1 li add br0 type bridge + if [ "${WITH_VRF}" = "yes" ]; then + ip -netns h1 li set br0 vrf ${VRF} up + else + ip -netns h1 li set br0 up + fi + ip -netns h1 addr add dev br0 ${H1_N1_IP}/24 + ip -netns h1 -6 addr add dev br0 ${H1_N1_IP6}/64 nodad + ip -netns h1 li set eth0 master br0 up + ip -netns h1 li set eth1 master br0 up + + # + # h2 + # + ip -netns h2 addr add dev eth0 ${H2_N2_IP}/24 + ip -netns h2 ro add default via ${R2_N2_IP} dev eth0 + ip -netns h2 -6 addr add dev eth0 ${H2_N2_IP6}/64 nodad + ip -netns h2 -6 ro add default via ${R2_N2_IP6} dev eth0 + + # + # r1 + # + ip -netns r1 addr add dev eth0 ${R1_N1_IP}/24 + ip -netns r1 -6 addr add dev eth0 ${R1_N1_IP6}/64 nodad + ip -netns r1 addr add dev eth1 ${R1_R2_N1_IP}/30 + ip -netns r1 -6 addr add dev eth1 ${R1_R2_N1_IP6}/126 nodad + + # + # r2 + # + ip -netns r2 addr add dev eth0 ${R2_N1_IP}/24 + ip -netns r2 -6 addr add dev eth0 ${R2_N1_IP6}/64 nodad + ip -netns r2 addr add dev eth1 ${R2_R1_N1_IP}/30 + ip -netns r2 -6 addr add dev eth1 ${R2_R1_N1_IP6}/126 nodad + ip -netns r2 addr add dev eth2 ${R2_N2_IP}/24 + ip -netns r2 -6 addr add dev eth2 ${R2_N2_IP6}/64 nodad + + sleep 2 + + R1_LLADDR=$(get_linklocal r1 eth0) + if [ $? -ne 0 ]; then + echo "Error: Failed to get link-local address of r1's eth0" + exit 1 + fi + log_debug "initial gateway is R1's lladdr = ${R1_LLADDR}" + + R2_LLADDR=$(get_linklocal r2 eth0) + if [ $? -ne 0 ]; then + echo "Error: Failed to get link-local address of r2's eth0" + exit 1 + fi + log_debug "initial gateway is R2's lladdr = ${R2_LLADDR}" +} + +change_h2_mtu() +{ + local mtu=$1 + + run_cmd ip -netns h2 li set eth0 mtu ${mtu} + run_cmd ip -netns r2 li set eth2 mtu ${mtu} +} + +check_exception() +{ + local mtu="$1" + local with_redirect="$2" + local desc="$3" + + # From 172.16.1.101: icmp_seq=1 Redirect Host(New nexthop: 172.16.1.102) + if [ "$VERBOSE" = "1" ]; then + echo "Commands to check for exception:" + run_cmd ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} + run_cmd ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} + fi + + if [ -n "${mtu}" ]; then + mtu=" mtu ${mtu}" + fi + if [ "$with_redirect" = "yes" ]; then + ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \ + grep -q "cache <redirected> expires [0-9]*sec${mtu}" + elif [ -n "${mtu}" ]; then + ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \ + grep -q "cache expires [0-9]*sec${mtu}" + else + # want to verify that neither mtu nor redirected appears in + # the route get output. The -v will wipe out the cache line + # if either are set so the last grep -q will not find a match + ip -netns h1 ro get ${H1_VRF_ARG} ${H2_N2_IP} | \ + grep -E -v 'mtu|redirected' | grep -q "cache" + fi + log_test $? 0 "IPv4: ${desc}" + + # No PMTU info for test "redirect" and "mtu exception plus redirect" + if [ "$with_redirect" = "yes" ] && [ "$desc" != "redirect exception plus mtu" ]; then + ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \ + grep -v "mtu" | grep -q "${H2_N2_IP6} .*via ${R2_LLADDR} dev br0" + elif [ -n "${mtu}" ]; then + ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \ + grep -q "${mtu}" + else + # IPv6 is a bit harder. First strip out the match if it + # contains an mtu exception and then look for the first + # gateway - R1's lladdr + ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \ + grep -v "mtu" | grep -q "${R1_LLADDR}" + fi + log_test $? 0 "IPv6: ${desc}" +} + +run_ping() +{ + local sz=$1 + + 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} + 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} +} + +replace_route_new() +{ + # r1 to h2 via r2 and eth0 + run_cmd ip -netns r1 nexthop replace id 1 via ${R2_N1_IP} dev eth0 + run_cmd ip -netns r1 nexthop replace id 2 via ${R2_LLADDR} dev eth0 +} + +reset_route_new() +{ + run_cmd ip -netns r1 nexthop flush + run_cmd ip -netns h1 nexthop flush + + initial_route_new +} + +initial_route_new() +{ + # r1 to h2 via r2 and eth1 + run_cmd ip -netns r1 nexthop add id 1 via ${R2_R1_N1_IP} dev eth1 + run_cmd ip -netns r1 ro add ${H2_N2} nhid 1 + + run_cmd ip -netns r1 nexthop add id 2 via ${R2_R1_N1_IP6} dev eth1 + run_cmd ip -netns r1 -6 ro add ${H2_N2_6} nhid 2 + + # h1 to h2 via r1 + run_cmd ip -netns h1 nexthop add id 1 via ${R1_N1_IP} dev br0 + run_cmd ip -netns h1 ro add ${H1_VRF_ARG} ${H2_N2} nhid 1 + + run_cmd ip -netns h1 nexthop add id 2 via ${R1_LLADDR} dev br0 + run_cmd ip -netns h1 -6 ro add ${H1_VRF_ARG} ${H2_N2_6} nhid 2 +} + +replace_route_legacy() +{ + # r1 to h2 via r2 and eth0 + run_cmd ip -netns r1 ro replace ${H2_N2} via ${R2_N1_IP} dev eth0 + run_cmd ip -netns r1 -6 ro replace ${H2_N2_6} via ${R2_LLADDR} dev eth0 +} + +reset_route_legacy() +{ + run_cmd ip -netns r1 ro del ${H2_N2} + run_cmd ip -netns r1 -6 ro del ${H2_N2_6} + + run_cmd ip -netns h1 ro del ${H1_VRF_ARG} ${H2_N2} + run_cmd ip -netns h1 -6 ro del ${H1_VRF_ARG} ${H2_N2_6} + + initial_route_legacy +} + +initial_route_legacy() +{ + # r1 to h2 via r2 and eth1 + run_cmd ip -netns r1 ro add ${H2_N2} via ${R2_R1_N1_IP} dev eth1 + run_cmd ip -netns r1 -6 ro add ${H2_N2_6} via ${R2_R1_N1_IP6} dev eth1 + + # h1 to h2 via r1 + # - IPv6 redirect only works if gateway is the LLA + run_cmd ip -netns h1 ro add ${H1_VRF_ARG} ${H2_N2} via ${R1_N1_IP} dev br0 + run_cmd ip -netns h1 -6 ro add ${H1_VRF_ARG} ${H2_N2_6} via ${R1_LLADDR} dev br0 +} + +check_connectivity() +{ + local rc + + run_cmd ip netns exec h1 ping -c1 -w1 ${H1_PING_ARG} ${H2_N2_IP} + rc=$? + run_cmd ip netns exec h1 ${ping6} -c1 -w1 ${H1_PING_ARG} ${H2_N2_IP6} + [ $? -ne 0 ] && rc=$? + + return $rc +} + +do_test() +{ + local ttype="$1" + + eval initial_route_${ttype} + + # verify connectivity + check_connectivity + if [ $? -ne 0 ]; then + echo "Error: Basic connectivity is broken" + ret=1 + return + fi + + # redirect exception followed by mtu + eval replace_route_${ttype} + run_ping 64 + check_exception "" "yes" "redirect exception" + + check_connectivity + if [ $? -ne 0 ]; then + echo "Error: Basic connectivity is broken after redirect" + ret=1 + return + fi + + change_h2_mtu 1300 + run_ping 1350 + check_exception "1300" "yes" "redirect exception plus mtu" + + # remove exceptions and restore routing + change_h2_mtu 1500 + eval reset_route_${ttype} + + check_connectivity + if [ $? -ne 0 ]; then + echo "Error: Basic connectivity is broken after reset" + ret=1 + return + fi + check_exception "" "no" "routing reset" + + # MTU exception followed by redirect + change_h2_mtu 1300 + run_ping 1350 + check_exception "1300" "no" "mtu exception" + + eval replace_route_${ttype} + run_ping 64 + check_exception "1300" "yes" "mtu exception plus redirect" + + check_connectivity + if [ $? -ne 0 ]; then + echo "Error: Basic connectivity is broken after redirect" + ret=1 + return + fi +} + +################################################################################ +# usage + +usage() +{ + cat <<EOF +usage: ${0##*/} OPTS + + -p Pause on fail + -v verbose mode (show commands and output) +EOF +} + +################################################################################ +# main + +# Some systems don't have a ping6 binary anymore +which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping) + +ret=0 +nsuccess=0 +nfail=0 + +while getopts :pv o +do + case $o in + p) PAUSE_ON_FAIL=yes;; + v) VERBOSE=$(($VERBOSE + 1));; + *) usage; exit 1;; + esac +done + +trap cleanup EXIT + +cleanup +WITH_VRF=no +setup + +log_section "Legacy routing" +do_test "legacy" + +cleanup +log_section "Legacy routing with VRF" +WITH_VRF=yes +setup +do_test "legacy" + +cleanup +log_section "Routing with nexthop objects" +ip nexthop ls >/dev/null 2>&1 +if [ $? -eq 0 ]; then + WITH_VRF=no + setup + do_test "new" + + cleanup + log_section "Routing with nexthop objects and VRF" + WITH_VRF=yes + setup + do_test "new" +else + echo "Nexthop objects not supported; skipping tests" +fi + +printf "\nTests passed: %3d\n" ${nsuccess} +printf "Tests failed: %3d\n" ${nfail} + +exit $ret |