tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4# This test is for the accept_untracked_na feature to
5# enable RFC9131 behaviour. The following is the test-matrix.
6# drop accept fwding behaviour
7# ---- ------ ------ ----------------------------------------------
8# 1 X X Don't update NC
9# 0 0 X Don't update NC
10# 0 1 0 Don't update NC
11# 0 1 1 Add a STALE NC entry
12
13source lib.sh
14ret=0
15
16PAUSE_ON_FAIL=no
17PAUSE=no
18
19HOST_INTF="veth-host"
20ROUTER_INTF="veth-router"
21
22ROUTER_ADDR="2000:20::1"
23HOST_ADDR="2000:20::2"
24SUBNET_WIDTH=64
25ROUTER_ADDR_WITH_MASK="${ROUTER_ADDR}/${SUBNET_WIDTH}"
26HOST_ADDR_WITH_MASK="${HOST_ADDR}/${SUBNET_WIDTH}"
27
28tcpdump_stdout=
29tcpdump_stderr=
30
31log_test()
32{
33 local rc=$1
34 local expected=$2
35 local msg="$3"
36
37 if [ ${rc} -eq ${expected} ]; then
38 printf " TEST: %-60s [ OK ]\n" "${msg}"
39 nsuccess=$((nsuccess+1))
40 else
41 ret=1
42 nfail=$((nfail+1))
43 printf " TEST: %-60s [FAIL]\n" "${msg}"
44 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
45 echo
46 echo "hit enter to continue, 'q' to quit"
47 read a
48 [ "$a" = "q" ] && exit 1
49 fi
50 fi
51
52 if [ "${PAUSE}" = "yes" ]; then
53 echo
54 echo "hit enter to continue, 'q' to quit"
55 read a
56 [ "$a" = "q" ] && exit 1
57 fi
58}
59
60setup()
61{
62 set -e
63
64 local drop_unsolicited_na=$1
65 local accept_untracked_na=$2
66 local forwarding=$3
67
68 # Setup two namespaces and a veth tunnel across them.
69 # On end of the tunnel is a router and the other end is a host.
70 setup_ns HOST_NS ROUTER_NS
71 IP_HOST="ip -6 -netns ${HOST_NS}"
72 IP_HOST_EXEC="ip netns exec ${HOST_NS}"
73 IP_ROUTER="ip -6 -netns ${ROUTER_NS}"
74 IP_ROUTER_EXEC="ip netns exec ${ROUTER_NS}"
75
76 ${IP_ROUTER} link add ${ROUTER_INTF} type veth \
77 peer name ${HOST_INTF} netns ${HOST_NS}
78
79 # Enable IPv6 on both router and host, and configure static addresses.
80 # The router here is the DUT
81 # Setup router configuration as specified by the arguments.
82 # forwarding=0 case is to check that a non-router
83 # doesn't add neighbour entries.
84 ROUTER_CONF=net.ipv6.conf.${ROUTER_INTF}
85 ${IP_ROUTER_EXEC} sysctl -qw \
86 ${ROUTER_CONF}.forwarding=${forwarding}
87 ${IP_ROUTER_EXEC} sysctl -qw \
88 ${ROUTER_CONF}.drop_unsolicited_na=${drop_unsolicited_na}
89 ${IP_ROUTER_EXEC} sysctl -qw \
90 ${ROUTER_CONF}.accept_untracked_na=${accept_untracked_na}
91 ${IP_ROUTER_EXEC} sysctl -qw ${ROUTER_CONF}.disable_ipv6=0
92 ${IP_ROUTER} addr add ${ROUTER_ADDR_WITH_MASK} dev ${ROUTER_INTF}
93
94 # Turn on ndisc_notify on host interface so that
95 # the host sends unsolicited NAs.
96 HOST_CONF=net.ipv6.conf.${HOST_INTF}
97 ${IP_HOST_EXEC} sysctl -qw ${HOST_CONF}.ndisc_notify=1
98 ${IP_HOST_EXEC} sysctl -qw ${HOST_CONF}.disable_ipv6=0
99 ${IP_HOST} addr add ${HOST_ADDR_WITH_MASK} dev ${HOST_INTF}
100
101 set +e
102}
103
104start_tcpdump() {
105 set -e
106 tcpdump_stdout=`mktemp`
107 tcpdump_stderr=`mktemp`
108 ${IP_ROUTER_EXEC} timeout 15s \
109 tcpdump --immediate-mode -tpni ${ROUTER_INTF} -c 1 \
110 "icmp6 && icmp6[0] == 136 && src ${HOST_ADDR}" \
111 > ${tcpdump_stdout} 2> /dev/null
112 set +e
113}
114
115cleanup_tcpdump()
116{
117 set -e
118 [[ ! -z ${tcpdump_stdout} ]] && rm -f ${tcpdump_stdout}
119 [[ ! -z ${tcpdump_stderr} ]] && rm -f ${tcpdump_stderr}
120 tcpdump_stdout=
121 tcpdump_stderr=
122 set +e
123}
124
125cleanup()
126{
127 cleanup_tcpdump
128 ip netns del ${HOST_NS}
129 ip netns del ${ROUTER_NS}
130}
131
132link_up() {
133 set -e
134 ${IP_ROUTER} link set dev ${ROUTER_INTF} up
135 ${IP_HOST} link set dev ${HOST_INTF} up
136 set +e
137}
138
139verify_ndisc() {
140 local drop_unsolicited_na=$1
141 local accept_untracked_na=$2
142 local forwarding=$3
143
144 neigh_show_output=$(${IP_ROUTER} neigh show \
145 to ${HOST_ADDR} dev ${ROUTER_INTF} nud stale)
146 if [ ${drop_unsolicited_na} -eq 0 ] && \
147 [ ${accept_untracked_na} -eq 1 ] && \
148 [ ${forwarding} -eq 1 ]; then
149 # Neighbour entry expected to be present for 011 case
150 [[ ${neigh_show_output} ]]
151 else
152 # Neighbour entry expected to be absent for all other cases
153 [[ -z ${neigh_show_output} ]]
154 fi
155}
156
157test_unsolicited_na_common()
158{
159 # Setup the test bed, but keep links down
160 setup $1 $2 $3
161
162 # Bring the link up, wait for the NA,
163 # and add a delay to ensure neighbour processing is done.
164 link_up
165 start_tcpdump
166
167 # Verify the neighbour table
168 verify_ndisc $1 $2 $3
169
170}
171
172test_unsolicited_na_combination() {
173 test_unsolicited_na_common $1 $2 $3
174 test_msg=("test_unsolicited_na: "
175 "drop_unsolicited_na=$1 "
176 "accept_untracked_na=$2 "
177 "forwarding=$3")
178 log_test $? 0 "${test_msg[*]}"
179 cleanup
180}
181
182test_unsolicited_na_combinations() {
183 # Args: drop_unsolicited_na accept_untracked_na forwarding
184
185 # Expect entry
186 test_unsolicited_na_combination 0 1 1
187
188 # Expect no entry
189 test_unsolicited_na_combination 0 0 0
190 test_unsolicited_na_combination 0 0 1
191 test_unsolicited_na_combination 0 1 0
192 test_unsolicited_na_combination 1 0 0
193 test_unsolicited_na_combination 1 0 1
194 test_unsolicited_na_combination 1 1 0
195 test_unsolicited_na_combination 1 1 1
196}
197
198###############################################################################
199# usage
200
201usage()
202{
203 cat <<EOF
204usage: ${0##*/} OPTS
205 -p Pause on fail
206 -P Pause after each test before cleanup
207EOF
208}
209
210###############################################################################
211# main
212
213while getopts :pPh o
214do
215 case $o in
216 p) PAUSE_ON_FAIL=yes;;
217 P) PAUSE=yes;;
218 h) usage; exit 0;;
219 *) usage; exit 1;;
220 esac
221done
222
223# make sure we don't pause twice
224[ "${PAUSE}" = "yes" ] && PAUSE_ON_FAIL=no
225
226if [ "$(id -u)" -ne 0 ];then
227 echo "SKIP: Need root privileges"
228 exit $ksft_skip;
229fi
230
231if [ ! -x "$(command -v ip)" ]; then
232 echo "SKIP: Could not run test without ip tool"
233 exit $ksft_skip
234fi
235
236if [ ! -x "$(command -v tcpdump)" ]; then
237 echo "SKIP: Could not run test without tcpdump tool"
238 exit $ksft_skip
239fi
240
241# start clean
242cleanup &> /dev/null
243
244test_unsolicited_na_combinations
245
246printf "\nTests passed: %3d\n" ${nsuccess}
247printf "Tests failed: %3d\n" ${nfail}
248
249exit $ret