diff options
Diffstat (limited to 'tools/testing/selftests/net/ndisc_unsolicited_na_test.sh')
| -rwxr-xr-x | tools/testing/selftests/net/ndisc_unsolicited_na_test.sh | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/ndisc_unsolicited_na_test.sh b/tools/testing/selftests/net/ndisc_unsolicited_na_test.sh new file mode 100755 index 000000000000..86e621b7b9c7 --- /dev/null +++ b/tools/testing/selftests/net/ndisc_unsolicited_na_test.sh @@ -0,0 +1,254 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +# This test is for the accept_untracked_na feature to +# enable RFC9131 behaviour. The following is the test-matrix. +# drop accept fwding behaviour +# ---- ------ ------ ---------------------------------------------- +# 1 X X Don't update NC +# 0 0 X Don't update NC +# 0 1 0 Don't update NC +# 0 1 1 Add a STALE NC entry + +ret=0 +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +PAUSE_ON_FAIL=no +PAUSE=no + +HOST_NS="ns-host" +ROUTER_NS="ns-router" + +HOST_INTF="veth-host" +ROUTER_INTF="veth-router" + +ROUTER_ADDR="2000:20::1" +HOST_ADDR="2000:20::2" +SUBNET_WIDTH=64 +ROUTER_ADDR_WITH_MASK="${ROUTER_ADDR}/${SUBNET_WIDTH}" +HOST_ADDR_WITH_MASK="${HOST_ADDR}/${SUBNET_WIDTH}" + +IP_HOST="ip -6 -netns ${HOST_NS}" +IP_HOST_EXEC="ip netns exec ${HOST_NS}" +IP_ROUTER="ip -6 -netns ${ROUTER_NS}" +IP_ROUTER_EXEC="ip netns exec ${ROUTER_NS}" + +tcpdump_stdout= +tcpdump_stderr= + +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 + [ "$a" = "q" ] && exit 1 + fi + fi + + if [ "${PAUSE}" = "yes" ]; then + echo + echo "hit enter to continue, 'q' to quit" + read a + [ "$a" = "q" ] && exit 1 + fi +} + +setup() +{ + set -e + + local drop_unsolicited_na=$1 + local accept_untracked_na=$2 + local forwarding=$3 + + # Setup two namespaces and a veth tunnel across them. + # On end of the tunnel is a router and the other end is a host. + ip netns add ${HOST_NS} + ip netns add ${ROUTER_NS} + ${IP_ROUTER} link add ${ROUTER_INTF} type veth \ + peer name ${HOST_INTF} netns ${HOST_NS} + + # Enable IPv6 on both router and host, and configure static addresses. + # The router here is the DUT + # Setup router configuration as specified by the arguments. + # forwarding=0 case is to check that a non-router + # doesn't add neighbour entries. + ROUTER_CONF=net.ipv6.conf.${ROUTER_INTF} + ${IP_ROUTER_EXEC} sysctl -qw \ + ${ROUTER_CONF}.forwarding=${forwarding} + ${IP_ROUTER_EXEC} sysctl -qw \ + ${ROUTER_CONF}.drop_unsolicited_na=${drop_unsolicited_na} + ${IP_ROUTER_EXEC} sysctl -qw \ + ${ROUTER_CONF}.accept_untracked_na=${accept_untracked_na} + ${IP_ROUTER_EXEC} sysctl -qw ${ROUTER_CONF}.disable_ipv6=0 + ${IP_ROUTER} addr add ${ROUTER_ADDR_WITH_MASK} dev ${ROUTER_INTF} + + # Turn on ndisc_notify on host interface so that + # the host sends unsolicited NAs. + HOST_CONF=net.ipv6.conf.${HOST_INTF} + ${IP_HOST_EXEC} sysctl -qw ${HOST_CONF}.ndisc_notify=1 + ${IP_HOST_EXEC} sysctl -qw ${HOST_CONF}.disable_ipv6=0 + ${IP_HOST} addr add ${HOST_ADDR_WITH_MASK} dev ${HOST_INTF} + + set +e +} + +start_tcpdump() { + set -e + tcpdump_stdout=`mktemp` + tcpdump_stderr=`mktemp` + ${IP_ROUTER_EXEC} timeout 15s \ + tcpdump --immediate-mode -tpni ${ROUTER_INTF} -c 1 \ + "icmp6 && icmp6[0] == 136 && src ${HOST_ADDR}" \ + > ${tcpdump_stdout} 2> /dev/null + set +e +} + +cleanup_tcpdump() +{ + set -e + [[ ! -z ${tcpdump_stdout} ]] && rm -f ${tcpdump_stdout} + [[ ! -z ${tcpdump_stderr} ]] && rm -f ${tcpdump_stderr} + tcpdump_stdout= + tcpdump_stderr= + set +e +} + +cleanup() +{ + cleanup_tcpdump + ip netns del ${HOST_NS} + ip netns del ${ROUTER_NS} +} + +link_up() { + set -e + ${IP_ROUTER} link set dev ${ROUTER_INTF} up + ${IP_HOST} link set dev ${HOST_INTF} up + set +e +} + +verify_ndisc() { + local drop_unsolicited_na=$1 + local accept_untracked_na=$2 + local forwarding=$3 + + neigh_show_output=$(${IP_ROUTER} neigh show \ + to ${HOST_ADDR} dev ${ROUTER_INTF} nud stale) + if [ ${drop_unsolicited_na} -eq 0 ] && \ + [ ${accept_untracked_na} -eq 1 ] && \ + [ ${forwarding} -eq 1 ]; then + # Neighbour entry expected to be present for 011 case + [[ ${neigh_show_output} ]] + else + # Neighbour entry expected to be absent for all other cases + [[ -z ${neigh_show_output} ]] + fi +} + +test_unsolicited_na_common() +{ + # Setup the test bed, but keep links down + setup $1 $2 $3 + + # Bring the link up, wait for the NA, + # and add a delay to ensure neighbour processing is done. + link_up + start_tcpdump + + # Verify the neighbour table + verify_ndisc $1 $2 $3 + +} + +test_unsolicited_na_combination() { + test_unsolicited_na_common $1 $2 $3 + test_msg=("test_unsolicited_na: " + "drop_unsolicited_na=$1 " + "accept_untracked_na=$2 " + "forwarding=$3") + log_test $? 0 "${test_msg[*]}" + cleanup +} + +test_unsolicited_na_combinations() { + # Args: drop_unsolicited_na accept_untracked_na forwarding + + # Expect entry + test_unsolicited_na_combination 0 1 1 + + # Expect no entry + test_unsolicited_na_combination 0 0 0 + test_unsolicited_na_combination 0 0 1 + test_unsolicited_na_combination 0 1 0 + test_unsolicited_na_combination 1 0 0 + test_unsolicited_na_combination 1 0 1 + test_unsolicited_na_combination 1 1 0 + test_unsolicited_na_combination 1 1 1 +} + +############################################################################### +# usage + +usage() +{ + cat <<EOF +usage: ${0##*/} OPTS + -p Pause on fail + -P Pause after each test before cleanup +EOF +} + +############################################################################### +# main + +while getopts :pPh o +do + case $o in + p) PAUSE_ON_FAIL=yes;; + P) PAUSE=yes;; + h) usage; exit 0;; + *) usage; exit 1;; + esac +done + +# make sure we don't pause twice +[ "${PAUSE}" = "yes" ] && PAUSE_ON_FAIL=no + +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 + +# start clean +cleanup &> /dev/null + +test_unsolicited_na_combinations + +printf "\nTests passed: %3d\n" ${nsuccess} +printf "Tests failed: %3d\n" ${nfail} + +exit $ret |