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Diffstat (limited to 'tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh')
| -rwxr-xr-x | tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh b/tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh new file mode 100755 index 000000000000..a40c0e9bd023 --- /dev/null +++ b/tools/testing/selftests/net/arp_ndisc_untracked_subnets.sh @@ -0,0 +1,302 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# 2 namespaces: one host and one router. Use arping from the host to send a +# garp to the router. Router accepts or ignores based on its arp_accept +# or accept_untracked_na configuration. + +source lib.sh + +TESTS="arp ndisc" + +ROUTER_INTF="veth-router" +ROUTER_ADDR="10.0.10.1" +ROUTER_ADDR_V6="2001:db8:abcd:0012::1" + +HOST_INTF="veth-host" +HOST_ADDR="10.0.10.2" +HOST_ADDR_V6="2001:db8:abcd:0012::2" + +SUBNET_WIDTH=24 +PREFIX_WIDTH_V6=64 + +cleanup() { + cleanup_ns ${HOST_NS} ${ROUTER_NS} +} + +cleanup_v6() { + cleanup_ns ${HOST_NS_V6} ${ROUTER_NS_V6} +} + +setup() { + set -e + local arp_accept=$1 + + # Set up two namespaces + setup_ns HOST_NS ROUTER_NS + + # Set up interfaces veth0 and veth1, which are pairs in separate + # namespaces. veth0 is veth-router, veth1 is veth-host. + # first, set up the inteface's link to the namespace + # then, set the interface "up" + ip netns exec ${ROUTER_NS} ip link add name ${ROUTER_INTF} \ + type veth peer name ${HOST_INTF} + + ip netns exec ${ROUTER_NS} ip link set dev ${ROUTER_INTF} up + ip netns exec ${ROUTER_NS} ip link set dev ${HOST_INTF} netns ${HOST_NS} + + ip netns exec ${HOST_NS} ip link set dev ${HOST_INTF} up + ip netns exec ${ROUTER_NS} ip addr add ${ROUTER_ADDR}/${SUBNET_WIDTH} \ + dev ${ROUTER_INTF} + + ip netns exec ${HOST_NS} ip addr add ${HOST_ADDR}/${SUBNET_WIDTH} \ + dev ${HOST_INTF} + ip netns exec ${HOST_NS} ip route add default via ${HOST_ADDR} \ + dev ${HOST_INTF} + ip netns exec ${ROUTER_NS} ip route add default via ${ROUTER_ADDR} \ + dev ${ROUTER_INTF} + + ROUTER_CONF=net.ipv4.conf.${ROUTER_INTF} + ip netns exec ${ROUTER_NS} sysctl -w \ + ${ROUTER_CONF}.arp_accept=${arp_accept} >/dev/null 2>&1 + set +e +} + +setup_v6() { + set -e + local accept_untracked_na=$1 + + # Set up two namespaces + setup_ns HOST_NS_V6 ROUTER_NS_V6 + + # Set up interfaces veth0 and veth1, which are pairs in separate + # namespaces. veth0 is veth-router, veth1 is veth-host. + # first, set up the inteface's link to the namespace + # then, set the interface "up" + ip -6 -netns ${ROUTER_NS_V6} link add name ${ROUTER_INTF} \ + type veth peer name ${HOST_INTF} + + ip -6 -netns ${ROUTER_NS_V6} link set dev ${ROUTER_INTF} up + ip -6 -netns ${ROUTER_NS_V6} link set dev ${HOST_INTF} netns \ + ${HOST_NS_V6} + + ip -6 -netns ${HOST_NS_V6} link set dev ${HOST_INTF} up + ip -6 -netns ${ROUTER_NS_V6} addr add \ + ${ROUTER_ADDR_V6}/${PREFIX_WIDTH_V6} dev ${ROUTER_INTF} nodad + + HOST_CONF=net.ipv6.conf.${HOST_INTF} + ip netns exec ${HOST_NS_V6} sysctl -qw ${HOST_CONF}.ndisc_notify=1 + ip netns exec ${HOST_NS_V6} sysctl -qw ${HOST_CONF}.disable_ipv6=0 + ip -6 -netns ${HOST_NS_V6} addr add ${HOST_ADDR_V6}/${PREFIX_WIDTH_V6} \ + dev ${HOST_INTF} + + ROUTER_CONF=net.ipv6.conf.${ROUTER_INTF} + + ip netns exec ${ROUTER_NS_V6} sysctl -w \ + ${ROUTER_CONF}.forwarding=1 >/dev/null 2>&1 + ip netns exec ${ROUTER_NS_V6} sysctl -w \ + ${ROUTER_CONF}.drop_unsolicited_na=0 >/dev/null 2>&1 + ip netns exec ${ROUTER_NS_V6} sysctl -w \ + ${ROUTER_CONF}.accept_untracked_na=${accept_untracked_na} \ + >/dev/null 2>&1 + set +e +} + +verify_arp() { + local arp_accept=$1 + local same_subnet=$2 + + neigh_show_output=$(ip netns exec ${ROUTER_NS} ip neigh get \ + ${HOST_ADDR} dev ${ROUTER_INTF} 2>/dev/null) + + if [ ${arp_accept} -eq 1 ]; then + # Neighbor entries expected + [[ ${neigh_show_output} ]] + elif [ ${arp_accept} -eq 2 ]; then + if [ ${same_subnet} -eq 1 ]; then + # Neighbor entries expected + [[ ${neigh_show_output} ]] + else + [[ -z "${neigh_show_output}" ]] + fi + else + [[ -z "${neigh_show_output}" ]] + fi + } + +arp_test_gratuitous() { + set -e + local arp_accept=$1 + local same_subnet=$2 + + if [ ${arp_accept} -eq 2 ]; then + test_msg=("test_arp: " + "accept_arp=$1 " + "same_subnet=$2") + if [ ${same_subnet} -eq 0 ]; then + HOST_ADDR=10.0.11.3 + else + HOST_ADDR=10.0.10.3 + fi + else + test_msg=("test_arp: " + "accept_arp=$1") + fi + # Supply arp_accept option to set up which sets it in sysctl + setup ${arp_accept} + ip netns exec ${HOST_NS} arping -A -I ${HOST_INTF} -U ${HOST_ADDR} -c1 2>&1 >/dev/null + + if verify_arp $1 $2; then + printf " TEST: %-60s [ OK ]\n" "${test_msg[*]}" + else + printf " TEST: %-60s [FAIL]\n" "${test_msg[*]}" + fi + cleanup + set +e +} + +arp_test_gratuitous_combinations() { + arp_test_gratuitous 0 + arp_test_gratuitous 1 + arp_test_gratuitous 2 0 # Second entry indicates subnet or not + arp_test_gratuitous 2 1 +} + +cleanup_tcpdump() { + set -e + [[ ! -z ${tcpdump_stdout} ]] && rm -f ${tcpdump_stdout} + [[ ! -z ${tcpdump_stderr} ]] && rm -f ${tcpdump_stderr} + tcpdump_stdout= + tcpdump_stderr= + set +e +} + +start_tcpdump() { + set -e + tcpdump_stdout=`mktemp` + tcpdump_stderr=`mktemp` + ip netns exec ${ROUTER_NS_V6} timeout 15s \ + tcpdump --immediate-mode -tpni ${ROUTER_INTF} -c 1 \ + "icmp6 && icmp6[0] == 136 && src ${HOST_ADDR_V6}" \ + > ${tcpdump_stdout} 2> /dev/null + set +e +} + +verify_ndisc() { + local accept_untracked_na=$1 + local same_subnet=$2 + + neigh_show_output=$(ip -6 -netns ${ROUTER_NS_V6} neigh show \ + to ${HOST_ADDR_V6} dev ${ROUTER_INTF} nud stale) + + if [ ${accept_untracked_na} -eq 1 ]; then + # Neighbour entry expected to be present + [[ ${neigh_show_output} ]] + elif [ ${accept_untracked_na} -eq 2 ]; then + if [ ${same_subnet} -eq 1 ]; then + [[ ${neigh_show_output} ]] + else + [[ -z "${neigh_show_output}" ]] + fi + else + # Neighbour entry expected to be absent for all other cases + [[ -z "${neigh_show_output}" ]] + fi +} + +ndisc_test_untracked_advertisements() { + set -e + test_msg=("test_ndisc: " + "accept_untracked_na=$1") + + local accept_untracked_na=$1 + local same_subnet=$2 + if [ ${accept_untracked_na} -eq 2 ]; then + test_msg=("test_ndisc: " + "accept_untracked_na=$1 " + "same_subnet=$2") + if [ ${same_subnet} -eq 0 ]; then + # Not same subnet + HOST_ADDR_V6=2000:db8:abcd:0013::4 + else + HOST_ADDR_V6=2001:db8:abcd:0012::3 + fi + fi + setup_v6 $1 $2 + start_tcpdump + + if verify_ndisc $1 $2; then + printf " TEST: %-60s [ OK ]\n" "${test_msg[*]}" + else + printf " TEST: %-60s [FAIL]\n" "${test_msg[*]}" + fi + + cleanup_tcpdump + cleanup_v6 + set +e +} + +ndisc_test_untracked_combinations() { + ndisc_test_untracked_advertisements 0 + ndisc_test_untracked_advertisements 1 + ndisc_test_untracked_advertisements 2 0 + ndisc_test_untracked_advertisements 2 1 +} + +################################################################################ +# usage + +usage() +{ + cat <<EOF +usage: ${0##*/} OPTS + + -t <test> Test(s) to run (default: all) + (options: $TESTS) +EOF +} + +################################################################################ +# main + +while getopts ":t:h" opt; do + case $opt in + t) TESTS=$OPTARG;; + h) usage; exit 0;; + *) usage; exit 1;; + esac +done + +if [ "$(id -u)" -ne 0 ];then + echo "SKIP: Need root privileges" + exit $ksft_skip; +fi + +if [ ! -x "$(command -v ip)" ]; then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +if [ ! -x "$(command -v tcpdump)" ]; then + echo "SKIP: Could not run test without tcpdump tool" + exit $ksft_skip +fi + +if [ ! -x "$(command -v arping)" ]; then + echo "SKIP: Could not run test without arping tool" + exit $ksft_skip +fi + +# start clean +cleanup &> /dev/null +cleanup_v6 &> /dev/null + +for t in $TESTS +do + case $t in + arp_test_gratuitous_combinations|arp) arp_test_gratuitous_combinations;; + ndisc_test_untracked_combinations|ndisc) \ + ndisc_test_untracked_combinations;; + help) echo "Test names: $TESTS"; exit 0;; +esac +done |