1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3 4# Author: Taehee Yoo <ap420073@gmail.com> 5# 6# This script evaluates the AMT driver. 7# There are four network-namespaces, LISTENER, SOURCE, GATEWAY, RELAY. 8# The role of LISTENER is to listen multicast traffic. 9# In order to do that, it send IGMP group join message. 10# The role of SOURCE is to send multicast traffic to listener. 11# The role of GATEWAY is to work Gateway role of AMT interface. 12# The role of RELAY is to work Relay role of AMT interface. 13# 14# 15# +------------------------+ 16# | LISTENER netns | 17# | | 18# | +------------------+ | 19# | | l_gw | | 20# | | 192.168.0.2/24 | | 21# | | 2001:db8::2/64 | | 22# | +------------------+ | 23# | . | 24# +------------------------+ 25# . 26# . 27# +-----------------------------------------------------+ 28# | . GATEWAY netns | 29# | . | 30# |+---------------------------------------------------+| 31# || . br0 || 32# || +------------------+ +------------------+ || 33# || | gw_l | | amtg | || 34# || | 192.168.0.1/24 | +--------+---------+ || 35# || | 2001:db8::1/64 | | || 36# || +------------------+ | || 37# |+-------------------------------------|-------------+| 38# | | | 39# | +--------+---------+ | 40# | | gw_relay | | 41# | | 10.0.0.1/24 | | 42# | +------------------+ | 43# | . | 44# +-----------------------------------------------------+ 45# . 46# . 47# +-----------------------------------------------------+ 48# | RELAY netns . | 49# | +------------------+ | 50# | | relay_gw | | 51# | | 10.0.0.2/24 | | 52# | +--------+---------+ | 53# | | | 54# | | | 55# | +------------------+ +--------+---------+ | 56# | | relay_src | | amtr | | 57# | | 172.17.0.1/24 | +------------------+ | 58# | | 2001:db8:3::1/64 | | 59# | +------------------+ | 60# | . | 61# | . | 62# +-----------------------------------------------------+ 63# . 64# . 65# +------------------------+ 66# | . | 67# | +------------------+ | 68# | | src_relay | | 69# | | 172.17.0.2/24 | | 70# | | 2001:db8:3::2/64 | | 71# | +------------------+ | 72# | SOURCE netns | 73# +------------------------+ 74#============================================================================== 75 76readonly LISTENER=$(mktemp -u listener-XXXXXXXX) 77readonly GATEWAY=$(mktemp -u gateway-XXXXXXXX) 78readonly RELAY=$(mktemp -u relay-XXXXXXXX) 79readonly SOURCE=$(mktemp -u source-XXXXXXXX) 80readonly SMCROUTEDIR="$(mktemp -d)" 81ERR=4 82err=0 83 84exit_cleanup() 85{ 86 for ns in "$@"; do 87 ip netns delete "${ns}" 2>/dev/null || true 88 done 89 if [ -f "$SMCROUTEDIR/amt.pid" ]; then 90 smcpid=$(< $SMCROUTEDIR/amt.pid) 91 kill $smcpid 92 fi 93 rm -rf $SMCROUTEDIR 94 95 exit $ERR 96} 97 98create_namespaces() 99{ 100 ip netns add "${LISTENER}" || exit_cleanup 101 ip netns add "${GATEWAY}" || exit_cleanup "${LISTENER}" 102 ip netns add "${RELAY}" || exit_cleanup "${LISTENER}" "${GATEWAY}" 103 ip netns add "${SOURCE}" || exit_cleanup "${LISTENER}" "${GATEWAY}" \ 104 "${RELAY}" 105} 106 107# The trap function handler 108# 109exit_cleanup_all() 110{ 111 exit_cleanup "${LISTENER}" "${GATEWAY}" "${RELAY}" "${SOURCE}" 112} 113 114setup_interface() 115{ 116 for ns in "${LISTENER}" "${GATEWAY}" "${RELAY}" "${SOURCE}"; do 117 ip -netns "${ns}" link set dev lo up 118 done; 119 120 ip link add l_gw type veth peer name gw_l 121 ip link add gw_relay type veth peer name relay_gw 122 ip link add relay_src type veth peer name src_relay 123 124 ip link set l_gw netns "${LISTENER}" up 125 ip link set gw_l netns "${GATEWAY}" up 126 ip link set gw_relay netns "${GATEWAY}" up 127 ip link set relay_gw netns "${RELAY}" up 128 ip link set relay_src netns "${RELAY}" up 129 ip link set src_relay netns "${SOURCE}" up mtu 1400 130 131 ip netns exec "${LISTENER}" ip a a 192.168.0.2/24 dev l_gw 132 ip netns exec "${LISTENER}" ip r a default via 192.168.0.1 dev l_gw 133 ip netns exec "${LISTENER}" ip a a 2001:db8::2/64 dev l_gw 134 ip netns exec "${LISTENER}" ip r a default via 2001:db8::1 dev l_gw 135 ip netns exec "${LISTENER}" ip a a 239.0.0.1/32 dev l_gw autojoin 136 ip netns exec "${LISTENER}" ip a a ff0e::5:6/128 dev l_gw autojoin 137 138 ip netns exec "${GATEWAY}" ip a a 192.168.0.1/24 dev gw_l 139 ip netns exec "${GATEWAY}" ip a a 2001:db8::1/64 dev gw_l 140 ip netns exec "${GATEWAY}" ip a a 10.0.0.1/24 dev gw_relay 141 ip netns exec "${GATEWAY}" ip link add br0 type bridge 142 ip netns exec "${GATEWAY}" ip link set br0 up 143 ip netns exec "${GATEWAY}" ip link set gw_l master br0 144 ip netns exec "${GATEWAY}" ip link set gw_l up 145 ip netns exec "${GATEWAY}" ip link add amtg master br0 type amt \ 146 mode gateway local 10.0.0.1 discovery 10.0.0.2 dev gw_relay \ 147 gateway_port 2268 relay_port 2268 148 ip netns exec "${RELAY}" ip a a 10.0.0.2/24 dev relay_gw 149 ip netns exec "${RELAY}" ip link add amtr type amt mode relay \ 150 local 10.0.0.2 dev relay_gw relay_port 2268 max_tunnels 4 151 ip netns exec "${RELAY}" ip a a 172.17.0.1/24 dev relay_src 152 ip netns exec "${RELAY}" ip a a 2001:db8:3::1/64 dev relay_src 153 ip netns exec "${SOURCE}" ip a a 172.17.0.2/24 dev src_relay 154 ip netns exec "${SOURCE}" ip a a 2001:db8:3::2/64 dev src_relay 155 ip netns exec "${SOURCE}" ip r a default via 172.17.0.1 dev src_relay 156 ip netns exec "${SOURCE}" ip r a default via 2001:db8:3::1 dev src_relay 157 ip netns exec "${RELAY}" ip link set amtr up 158 ip netns exec "${GATEWAY}" ip link set amtg up 159} 160 161setup_sysctl() 162{ 163 ip netns exec "${RELAY}" sysctl net.ipv4.ip_forward=1 -w -q 164} 165 166setup_iptables() 167{ 168 ip netns exec "${RELAY}" iptables -t mangle -I PREROUTING \ 169 -d 239.0.0.1 -j TTL --ttl-set 2 170 ip netns exec "${RELAY}" ip6tables -t mangle -I PREROUTING \ 171 -j HL --hl-set 2 172} 173 174setup_mcast_routing() 175{ 176 ip netns exec "${RELAY}" smcrouted -P $SMCROUTEDIR/amt.pid 177 ip netns exec "${RELAY}" smcroutectl a relay_src \ 178 172.17.0.2 239.0.0.1 amtr 179 ip netns exec "${RELAY}" smcroutectl a relay_src \ 180 2001:db8:3::2 ff0e::5:6 amtr 181} 182 183test_remote_ip() 184{ 185 REMOTE=$(ip netns exec "${GATEWAY}" \ 186 ip -d -j link show amtg | jq .[0].linkinfo.info_data.remote) 187 if [ $REMOTE == "\"10.0.0.2\"" ]; then 188 printf "TEST: %-60s [ OK ]\n" "amt discovery" 189 else 190 printf "TEST: %-60s [FAIL]\n" "amt discovery" 191 ERR=1 192 fi 193} 194 195send_mcast_torture4() 196{ 197 ip netns exec "${SOURCE}" bash -c \ 198 'cat /dev/urandom | head -c 1G | nc -w 1 -u 239.0.0.1 4001' 199} 200 201 202send_mcast_torture6() 203{ 204 ip netns exec "${SOURCE}" bash -c \ 205 'cat /dev/urandom | head -c 1G | nc -w 1 -u ff0e::5:6 6001' 206} 207 208check_features() 209{ 210 ip link help 2>&1 | grep -q amt 211 if [ $? -ne 0 ]; then 212 echo "Missing amt support in iproute2" >&2 213 exit_cleanup 214 fi 215} 216 217test_ipv4_forward() 218{ 219 RESULT4=$(ip netns exec "${LISTENER}" timeout 15 socat - UDP4-LISTEN:4000,readbytes=128 || true) 220 if echo "$RESULT4" | grep -q "172.17.0.2"; then 221 printf "TEST: %-60s [ OK ]\n" "IPv4 amt multicast forwarding" 222 exit 0 223 else 224 printf "TEST: %-60s [FAIL]\n" "IPv4 amt multicast forwarding" 225 exit 1 226 fi 227} 228 229test_ipv6_forward() 230{ 231 RESULT6=$(ip netns exec "${LISTENER}" timeout 15 socat - UDP6-LISTEN:6000,readbytes=128 || true) 232 if echo "$RESULT6" | grep -q "2001:db8:3::2"; then 233 printf "TEST: %-60s [ OK ]\n" "IPv6 amt multicast forwarding" 234 exit 0 235 else 236 printf "TEST: %-60s [FAIL]\n" "IPv6 amt multicast forwarding" 237 exit 1 238 fi 239} 240 241send_mcast4() 242{ 243 sleep 2 244 ip netns exec "${SOURCE}" bash -c \ 245 'printf "%s %128s" 172.17.0.2 | nc -w 1 -u 239.0.0.1 4000' & 246} 247 248send_mcast6() 249{ 250 sleep 2 251 ip netns exec "${SOURCE}" bash -c \ 252 'printf "%s %128s" 2001:db8:3::2 | nc -w 1 -u ff0e::5:6 6000' & 253} 254 255check_features 256 257create_namespaces 258 259set -e 260trap exit_cleanup_all EXIT 261 262setup_interface 263setup_sysctl 264setup_iptables 265setup_mcast_routing 266test_remote_ip 267test_ipv4_forward & 268pid=$! 269send_mcast4 270wait $pid || err=$? 271if [ $err -eq 1 ]; then 272 ERR=1 273fi 274test_ipv6_forward & 275pid=$! 276send_mcast6 277wait $pid || err=$? 278if [ $err -eq 1 ]; then 279 ERR=1 280fi 281send_mcast_torture4 282printf "TEST: %-60s [ OK ]\n" "IPv4 amt traffic forwarding torture" 283send_mcast_torture6 284printf "TEST: %-60s [ OK ]\n" "IPv6 amt traffic forwarding torture" 285sleep 5 286if [ "${ERR}" -eq 1 ]; then 287 echo "Some tests failed." >&2 288else 289 ERR=0 290fi 291