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| 1 | +#!/bin/bash |
| 2 | +# SPDX-License-Identifier: GPL-2.0 |
| 3 | + |
| 4 | +# +--------------------+ |
| 5 | +# | H1 | |
| 6 | +# | | |
| 7 | +# | $h1.10 + | |
| 8 | +# | 192.0.2.2/24 | | |
| 9 | +# | 2001:db8:1::2/64 | | |
| 10 | +# | | | |
| 11 | +# | $h1 + | |
| 12 | +# | | | |
| 13 | +# +------------------|-+ |
| 14 | +# | |
| 15 | +# +------------------|-+ |
| 16 | +# | SW | | |
| 17 | +# | $swp1 + | |
| 18 | +# | | | |
| 19 | +# | $swp1.10 + | |
| 20 | +# | 192.0.2.1/24 | |
| 21 | +# | 2001:db8:1::1/64 | |
| 22 | +# | | |
| 23 | +# +--------------------+ |
| 24 | + |
| 25 | +ALL_TESTS=" |
| 26 | + ping_ipv4 |
| 27 | + ping_ipv6 |
| 28 | + max_mtu_config_test |
| 29 | + max_mtu_traffic_test |
| 30 | + min_mtu_config_test |
| 31 | + min_mtu_traffic_test |
| 32 | +" |
| 33 | + |
| 34 | +NUM_NETIFS=2 |
| 35 | +source lib.sh |
| 36 | + |
| 37 | +h1_create() |
| 38 | +{ |
| 39 | + simple_if_init $h1 |
| 40 | + vlan_create $h1 10 v$h1 192.0.2.2/24 2001:db8:1::2/64 |
| 41 | +} |
| 42 | + |
| 43 | +h1_destroy() |
| 44 | +{ |
| 45 | + vlan_destroy $h1 10 192.0.2.2/24 2001:db8:1::2/64 |
| 46 | + simple_if_fini $h1 |
| 47 | +} |
| 48 | + |
| 49 | +switch_create() |
| 50 | +{ |
| 51 | + ip li set dev $swp1 up |
| 52 | + vlan_create $swp1 10 "" 192.0.2.1/24 2001:db8:1::1/64 |
| 53 | +} |
| 54 | + |
| 55 | +switch_destroy() |
| 56 | +{ |
| 57 | + ip li set dev $swp1 down |
| 58 | + vlan_destroy $swp1 10 |
| 59 | +} |
| 60 | + |
| 61 | +setup_prepare() |
| 62 | +{ |
| 63 | + h1=${NETIFS[p1]} |
| 64 | + swp1=${NETIFS[p2]} |
| 65 | + |
| 66 | + vrf_prepare |
| 67 | + |
| 68 | + h1_create |
| 69 | + |
| 70 | + switch_create |
| 71 | + |
| 72 | + forwarding_enable |
| 73 | +} |
| 74 | + |
| 75 | +cleanup() |
| 76 | +{ |
| 77 | + pre_cleanup |
| 78 | + |
| 79 | + forwarding_restore |
| 80 | + |
| 81 | + switch_destroy |
| 82 | + |
| 83 | + h1_destroy |
| 84 | + |
| 85 | + vrf_cleanup |
| 86 | +} |
| 87 | + |
| 88 | +ping_ipv4() |
| 89 | +{ |
| 90 | + ping_test $h1.10 192.0.2.1 |
| 91 | +} |
| 92 | + |
| 93 | +ping_ipv6() |
| 94 | +{ |
| 95 | + ping6_test $h1.10 2001:db8:1::1 |
| 96 | +} |
| 97 | + |
| 98 | +min_max_mtu_get_if() |
| 99 | +{ |
| 100 | + local dev=$1; shift |
| 101 | + local min_max=$1; shift |
| 102 | + |
| 103 | + ip -d -j link show $dev | jq ".[].$min_max" |
| 104 | +} |
| 105 | + |
| 106 | +ensure_compatible_min_max_mtu() |
| 107 | +{ |
| 108 | + local min_max=$1; shift |
| 109 | + |
| 110 | + local mtu=$(min_max_mtu_get_if ${NETIFS[p1]} $min_max) |
| 111 | + local i |
| 112 | + |
| 113 | + for ((i = 2; i <= NUM_NETIFS; ++i)); do |
| 114 | + local current_mtu=$(min_max_mtu_get_if ${NETIFS[p$i]} $min_max) |
| 115 | + |
| 116 | + if [ $current_mtu -ne $mtu ]; then |
| 117 | + return 1 |
| 118 | + fi |
| 119 | + done |
| 120 | +} |
| 121 | + |
| 122 | +mtu_set_if() |
| 123 | +{ |
| 124 | + local dev=$1; shift |
| 125 | + local mtu=$1; shift |
| 126 | + local should_fail=${1:-0}; shift |
| 127 | + |
| 128 | + mtu_set $dev $mtu 2>/dev/null |
| 129 | + check_err_fail $should_fail $? "Set MTU $mtu for $dev" |
| 130 | +} |
| 131 | + |
| 132 | +mtu_set_all_if() |
| 133 | +{ |
| 134 | + local mtu=$1; shift |
| 135 | + local i |
| 136 | + |
| 137 | + for ((i = 1; i <= NUM_NETIFS; ++i)); do |
| 138 | + mtu_set_if ${NETIFS[p$i]} $mtu |
| 139 | + mtu_set_if ${NETIFS[p$i]}.10 $mtu |
| 140 | + done |
| 141 | +} |
| 142 | + |
| 143 | +mtu_restore_all_if() |
| 144 | +{ |
| 145 | + local i |
| 146 | + |
| 147 | + for ((i = 1; i <= NUM_NETIFS; ++i)); do |
| 148 | + mtu_restore ${NETIFS[p$i]}.10 |
| 149 | + mtu_restore ${NETIFS[p$i]} |
| 150 | + done |
| 151 | +} |
| 152 | + |
| 153 | +mtu_test_ping4() |
| 154 | +{ |
| 155 | + local mtu=$1; shift |
| 156 | + local should_fail=$1; shift |
| 157 | + |
| 158 | + # Ping adds 8 bytes for ICMP header and 20 bytes for IP header |
| 159 | + local ping_headers_len=$((20 + 8)) |
| 160 | + local pkt_size=$((mtu - ping_headers_len)) |
| 161 | + |
| 162 | + ping_do $h1.10 192.0.2.1 "-s $pkt_size -M do" |
| 163 | + check_err_fail $should_fail $? "Ping, packet size: $pkt_size" |
| 164 | +} |
| 165 | + |
| 166 | +mtu_test_ping6() |
| 167 | +{ |
| 168 | + local mtu=$1; shift |
| 169 | + local should_fail=$1; shift |
| 170 | + |
| 171 | + # Ping adds 8 bytes for ICMP header and 40 bytes for IPv6 header |
| 172 | + local ping6_headers_len=$((40 + 8)) |
| 173 | + local pkt_size=$((mtu - ping6_headers_len)) |
| 174 | + |
| 175 | + ping6_do $h1.10 2001:db8:1::1 "-s $pkt_size -M do" |
| 176 | + check_err_fail $should_fail $? "Ping6, packet size: $pkt_size" |
| 177 | +} |
| 178 | + |
| 179 | +max_mtu_config_test() |
| 180 | +{ |
| 181 | + local i |
| 182 | + |
| 183 | + RET=0 |
| 184 | + |
| 185 | + for ((i = 1; i <= NUM_NETIFS; ++i)); do |
| 186 | + local dev=${NETIFS[p$i]} |
| 187 | + local max_mtu=$(min_max_mtu_get_if $dev "max_mtu") |
| 188 | + local should_fail |
| 189 | + |
| 190 | + should_fail=0 |
| 191 | + mtu_set_if $dev $max_mtu $should_fail |
| 192 | + mtu_restore $dev |
| 193 | + |
| 194 | + should_fail=1 |
| 195 | + mtu_set_if $dev $((max_mtu + 1)) $should_fail |
| 196 | + mtu_restore $dev |
| 197 | + done |
| 198 | + |
| 199 | + log_test "Test maximum MTU configuration" |
| 200 | +} |
| 201 | + |
| 202 | +max_mtu_traffic_test() |
| 203 | +{ |
| 204 | + local should_fail |
| 205 | + local max_mtu |
| 206 | + |
| 207 | + RET=0 |
| 208 | + |
| 209 | + if ! ensure_compatible_min_max_mtu "max_mtu"; then |
| 210 | + log_test_xfail "Topology has incompatible maximum MTU values" |
| 211 | + return |
| 212 | + fi |
| 213 | + |
| 214 | + max_mtu=$(min_max_mtu_get_if ${NETIFS[p1]} "max_mtu") |
| 215 | + |
| 216 | + should_fail=0 |
| 217 | + mtu_set_all_if $max_mtu |
| 218 | + mtu_test_ping4 $max_mtu $should_fail |
| 219 | + mtu_test_ping6 $max_mtu $should_fail |
| 220 | + mtu_restore_all_if |
| 221 | + |
| 222 | + should_fail=1 |
| 223 | + mtu_set_all_if $((max_mtu - 1)) |
| 224 | + mtu_test_ping4 $max_mtu $should_fail |
| 225 | + mtu_test_ping6 $max_mtu $should_fail |
| 226 | + mtu_restore_all_if |
| 227 | + |
| 228 | + log_test "Test traffic, packet size is maximum MTU" |
| 229 | +} |
| 230 | + |
| 231 | +min_mtu_config_test() |
| 232 | +{ |
| 233 | + local i |
| 234 | + |
| 235 | + RET=0 |
| 236 | + |
| 237 | + for ((i = 1; i <= NUM_NETIFS; ++i)); do |
| 238 | + local dev=${NETIFS[p$i]} |
| 239 | + local min_mtu=$(min_max_mtu_get_if $dev "min_mtu") |
| 240 | + local should_fail |
| 241 | + |
| 242 | + should_fail=0 |
| 243 | + mtu_set_if $dev $min_mtu $should_fail |
| 244 | + mtu_restore $dev |
| 245 | + |
| 246 | + should_fail=1 |
| 247 | + mtu_set_if $dev $((min_mtu - 1)) $should_fail |
| 248 | + mtu_restore $dev |
| 249 | + done |
| 250 | + |
| 251 | + log_test "Test minimum MTU configuration" |
| 252 | +} |
| 253 | + |
| 254 | +min_mtu_traffic_test() |
| 255 | +{ |
| 256 | + local should_fail=0 |
| 257 | + local min_mtu |
| 258 | + |
| 259 | + RET=0 |
| 260 | + |
| 261 | + if ! ensure_compatible_min_max_mtu "min_mtu"; then |
| 262 | + log_test_xfail "Topology has incompatible minimum MTU values" |
| 263 | + return |
| 264 | + fi |
| 265 | + |
| 266 | + min_mtu=$(min_max_mtu_get_if ${NETIFS[p1]} "min_mtu") |
| 267 | + mtu_set_all_if $min_mtu |
| 268 | + mtu_test_ping4 $min_mtu $should_fail |
| 269 | + # Do not test minimum MTU with IPv6, as IPv6 requires higher MTU. |
| 270 | + |
| 271 | + mtu_restore_all_if |
| 272 | + |
| 273 | + log_test "Test traffic, packet size is minimum MTU" |
| 274 | +} |
| 275 | + |
| 276 | +trap cleanup EXIT |
| 277 | + |
| 278 | +setup_prepare |
| 279 | +setup_wait |
| 280 | + |
| 281 | +tests_run |
| 282 | + |
| 283 | +exit $EXIT_STATUS |
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