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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 | #!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # Test a "one-armed router" [1] scenario. Packets forwarded between H1 and H2 # should be forwarded by the ASIC, but also trapped so that ICMP redirect # packets could be potentially generated. # # 1. https://en.wikipedia.org/wiki/One-armed_router # # +---------------------------------+ # | H1 (vrf) | # | + $h1 | # | | 192.0.2.1/24 | # | | 2001:db8:1::1/64 | # | | | # | | default via 192.0.2.2 | # | | default via 2001:db8:1::2 | # +----|----------------------------+ # | # +----|----------------------------------------------------------------------+ # | SW | | # | +--|--------------------------------------------------------------------+ | # | | + $swp1 BR0 (802.1d) | | # | | | | # | | 192.0.2.2/24 | | # | | 2001:db8:1::2/64 | | # | | 198.51.100.2/24 | | # | | 2001:db8:2::2/64 | | # | | | | # | | + $swp2 | | # | +--|--------------------------------------------------------------------+ | # | | | # +----|----------------------------------------------------------------------+ # | # +----|----------------------------+ # | | default via 198.51.100.2 | # | | default via 2001:db8:2::2 | # | | | # | | 2001:db8:2::1/64 | # | | 198.51.100.1/24 | # | + $h2 | # | H2 (vrf) | # +---------------------------------+ lib_dir=$(dirname $0)/../../../net/forwarding ALL_TESTS="ping_ipv4 ping_ipv6 fwd_mark_ipv4 fwd_mark_ipv6" NUM_NETIFS=4 source $lib_dir/tc_common.sh source $lib_dir/lib.sh h1_create() { simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64 ip -4 route add default vrf v$h1 nexthop via 192.0.2.2 ip -6 route add default vrf v$h1 nexthop via 2001:db8:1::2 } h1_destroy() { ip -6 route del default vrf v$h1 nexthop via 2001:db8:1::2 ip -4 route del default vrf v$h1 nexthop via 192.0.2.2 simple_if_fini $h1 192.0.2.1/24 2001:db8:1::1/64 } h2_create() { simple_if_init $h2 198.51.100.1/24 2001:db8:2::1/64 ip -4 route add default vrf v$h2 nexthop via 198.51.100.2 ip -6 route add default vrf v$h2 nexthop via 2001:db8:2::2 } h2_destroy() { ip -6 route del default vrf v$h2 nexthop via 2001:db8:2::2 ip -4 route del default vrf v$h2 nexthop via 198.51.100.2 simple_if_fini $h2 198.51.100.1/24 2001:db8:2::1/64 } switch_create() { ip link add name br0 type bridge mcast_snooping 0 ip link set dev br0 up ip link set dev $swp1 master br0 ip link set dev $swp1 up ip link set dev $swp2 master br0 ip link set dev $swp2 up tc qdisc add dev $swp1 clsact tc qdisc add dev $swp2 clsact __addr_add_del br0 add 192.0.2.2/24 2001:db8:1::2/64 __addr_add_del br0 add 198.51.100.2/24 2001:db8:2::2/64 } switch_destroy() { __addr_add_del br0 del 198.51.100.2/24 2001:db8:2::2/64 __addr_add_del br0 del 192.0.2.2/24 2001:db8:1::2/64 tc qdisc del dev $swp2 clsact tc qdisc del dev $swp1 clsact ip link set dev $swp2 down ip link set dev $swp2 nomaster ip link set dev $swp1 down ip link set dev $swp1 nomaster ip link set dev br0 down ip link del dev br0 } ping_ipv4() { ping_test $h1 198.51.100.1 ": h1->h2" } ping_ipv6() { ping6_test $h1 2001:db8:2::1 ": h1->h2" } fwd_mark_ipv4() { # Transmit packets from H1 to H2 and make sure they are trapped at # swp1 due to loopback error, but only forwarded by the ASIC through # swp2 tc filter add dev $swp1 ingress protocol ip pref 1 handle 101 flower \ skip_hw dst_ip 198.51.100.1 ip_proto udp dst_port 52768 \ action pass tc filter add dev $swp2 egress protocol ip pref 1 handle 101 flower \ skip_hw dst_ip 198.51.100.1 ip_proto udp dst_port 52768 \ action pass tc filter add dev $swp2 egress protocol ip pref 2 handle 102 flower \ skip_sw dst_ip 198.51.100.1 ip_proto udp dst_port 52768 \ action pass ip vrf exec v$h1 $MZ $h1 -c 10 -d 100msec -p 64 -A 192.0.2.1 \ -B 198.51.100.1 -t udp dp=52768,sp=42768 -q RET=0 tc_check_packets "dev $swp1 ingress" 101 10 check_err $? log_test "fwd mark: trapping IPv4 packets due to LBERROR" RET=0 tc_check_packets "dev $swp2 egress" 101 0 check_err $? log_test "fwd mark: forwarding IPv4 packets in software" RET=0 tc_check_packets "dev $swp2 egress" 102 10 check_err $? log_test "fwd mark: forwarding IPv4 packets in hardware" tc filter del dev $swp2 egress protocol ip pref 2 handle 102 flower tc filter del dev $swp2 egress protocol ip pref 1 handle 101 flower tc filter del dev $swp1 ingress protocol ip pref 1 handle 101 flower } fwd_mark_ipv6() { tc filter add dev $swp1 ingress protocol ipv6 pref 1 handle 101 flower \ skip_hw dst_ip 2001:db8:2::1 ip_proto udp dst_port 52768 \ action pass tc filter add dev $swp2 egress protocol ipv6 pref 1 handle 101 flower \ skip_hw dst_ip 2001:db8:2::1 ip_proto udp dst_port 52768 \ action pass tc filter add dev $swp2 egress protocol ipv6 pref 2 handle 102 flower \ skip_sw dst_ip 2001:db8:2::1 ip_proto udp dst_port 52768 \ action pass ip vrf exec v$h1 $MZ $h1 -6 -c 10 -d 100msec -p 64 -A 2001:db8:1::1 \ -B 2001:db8:2::1 -t udp dp=52768,sp=42768 -q RET=0 tc_check_packets "dev $swp1 ingress" 101 10 check_err $? log_test "fwd mark: trapping IPv6 packets due to LBERROR" RET=0 tc_check_packets "dev $swp2 egress" 101 0 check_err $? log_test "fwd mark: forwarding IPv6 packets in software" RET=0 tc_check_packets "dev $swp2 egress" 102 10 check_err $? log_test "fwd mark: forwarding IPv6 packets in hardware" tc filter del dev $swp2 egress protocol ipv6 pref 2 handle 102 flower tc filter del dev $swp2 egress protocol ipv6 pref 1 handle 101 flower tc filter del dev $swp1 ingress protocol ipv6 pref 1 handle 101 flower } setup_prepare() { h1=${NETIFS[p1]} swp1=${NETIFS[p2]} swp2=${NETIFS[p3]} h2=${NETIFS[p4]} vrf_prepare forwarding_enable sysctl_set net.ipv4.conf.all.accept_redirects 0 sysctl_set net.ipv6.conf.all.accept_redirects 0 h1_create h2_create switch_create } cleanup() { pre_cleanup switch_destroy h2_destroy h1_destroy sysctl_restore net.ipv6.conf.all.accept_redirects sysctl_restore net.ipv4.conf.all.accept_redirects forwarding_restore vrf_cleanup } trap cleanup EXIT setup_prepare setup_wait tests_run exit $EXIT_STATUS |