Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Foundation |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.openstacknetworking.impl; |
| 17 | |
| 18 | import com.google.common.base.Strings; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 19 | import org.onlab.packet.Ethernet; |
| 20 | import org.onlab.packet.ICMP; |
Jian Li | 2fa3ded | 2018-08-10 02:22:47 +0000 | [diff] [blame] | 21 | import org.onlab.packet.ICMPEcho; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 22 | import org.onlab.packet.IPv4; |
| 23 | import org.onlab.packet.IpAddress; |
| 24 | import org.onlab.packet.MacAddress; |
daniel park | 576969a | 2018-03-09 07:07:41 +0900 | [diff] [blame] | 25 | import org.onlab.packet.VlanId; |
sangho | 247232c | 2017-08-24 17:22:08 +0900 | [diff] [blame] | 26 | import org.onlab.util.KryoNamespace; |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 27 | import org.onosproject.cluster.ClusterService; |
| 28 | import org.onosproject.cluster.LeadershipService; |
| 29 | import org.onosproject.cluster.NodeId; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 30 | import org.onosproject.core.ApplicationId; |
| 31 | import org.onosproject.core.CoreService; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 32 | import org.onosproject.net.DeviceId; |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 33 | import org.onosproject.net.flow.DefaultTrafficSelector; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 34 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 35 | import org.onosproject.net.flow.TrafficSelector; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 36 | import org.onosproject.net.flow.TrafficTreatment; |
| 37 | import org.onosproject.net.packet.DefaultOutboundPacket; |
| 38 | import org.onosproject.net.packet.InboundPacket; |
| 39 | import org.onosproject.net.packet.OutboundPacket; |
| 40 | import org.onosproject.net.packet.PacketContext; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 41 | import org.onosproject.net.packet.PacketProcessor; |
| 42 | import org.onosproject.net.packet.PacketService; |
| 43 | import org.onosproject.openstacknetworking.api.Constants; |
daniel park | 576969a | 2018-03-09 07:07:41 +0900 | [diff] [blame] | 44 | import org.onosproject.openstacknetworking.api.ExternalPeerRouter; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 45 | import org.onosproject.openstacknetworking.api.InstancePort; |
| 46 | import org.onosproject.openstacknetworking.api.InstancePortService; |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 47 | import org.onosproject.openstacknetworking.api.OpenstackFlowRuleService; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 48 | import org.onosproject.openstacknetworking.api.OpenstackNetworkService; |
sangho | 3672199 | 2017-08-03 11:13:17 +0900 | [diff] [blame] | 49 | import org.onosproject.openstacknetworking.api.OpenstackRouterService; |
Hyunsun Moon | 0d45736 | 2017-06-27 17:19:41 +0900 | [diff] [blame] | 50 | import org.onosproject.openstacknode.api.OpenstackNode; |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 51 | import org.onosproject.openstacknode.api.OpenstackNodeEvent; |
| 52 | import org.onosproject.openstacknode.api.OpenstackNodeListener; |
Hyunsun Moon | 0d45736 | 2017-06-27 17:19:41 +0900 | [diff] [blame] | 53 | import org.onosproject.openstacknode.api.OpenstackNodeService; |
sangho | 247232c | 2017-08-24 17:22:08 +0900 | [diff] [blame] | 54 | import org.onosproject.store.serializers.KryoNamespaces; |
| 55 | import org.onosproject.store.service.ConsistentMap; |
| 56 | import org.onosproject.store.service.Serializer; |
| 57 | import org.onosproject.store.service.StorageService; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 58 | import org.openstack4j.model.network.Port; |
| 59 | import org.openstack4j.model.network.Router; |
| 60 | import org.openstack4j.model.network.RouterInterface; |
| 61 | import org.openstack4j.model.network.Subnet; |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 62 | import org.osgi.service.component.annotations.Activate; |
| 63 | import org.osgi.service.component.annotations.Component; |
| 64 | import org.osgi.service.component.annotations.Deactivate; |
| 65 | import org.osgi.service.component.annotations.Reference; |
| 66 | import org.osgi.service.component.annotations.ReferenceCardinality; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 67 | import org.slf4j.Logger; |
| 68 | |
| 69 | import java.nio.ByteBuffer; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 70 | import java.util.Objects; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 71 | import java.util.Set; |
| 72 | import java.util.concurrent.ExecutorService; |
| 73 | import java.util.stream.Collectors; |
| 74 | |
sangho | 247232c | 2017-08-24 17:22:08 +0900 | [diff] [blame] | 75 | import static com.google.common.base.Preconditions.checkArgument; |
Daniel Park | 4d48684 | 2018-07-24 17:06:43 +0900 | [diff] [blame] | 76 | import static com.google.common.base.Preconditions.checkNotNull; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 77 | import static java.util.concurrent.Executors.newSingleThreadExecutor; |
Daniel Park | 4d48684 | 2018-07-24 17:06:43 +0900 | [diff] [blame] | 78 | import static org.onlab.packet.ICMP.TYPE_ECHO_REPLY; |
| 79 | import static org.onlab.packet.ICMP.TYPE_ECHO_REQUEST; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 80 | import static org.onlab.util.Tools.groupedThreads; |
sangho | 3672199 | 2017-08-03 11:13:17 +0900 | [diff] [blame] | 81 | import static org.onosproject.openstacknetworking.api.Constants.DEFAULT_GATEWAY_MAC; |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 82 | import static org.onosproject.openstacknetworking.api.Constants.GW_COMMON_TABLE; |
sangho | 3672199 | 2017-08-03 11:13:17 +0900 | [diff] [blame] | 83 | import static org.onosproject.openstacknetworking.api.Constants.OPENSTACK_NETWORKING_APP_ID; |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 84 | import static org.onosproject.openstacknetworking.api.Constants.PRIORITY_INTERNAL_ROUTING_RULE; |
Jian Li | ebde74d | 2018-11-14 00:18:57 +0900 | [diff] [blame] | 85 | import static org.onosproject.openstacknetworking.util.OpenstackNetworkingUtil.externalIpFromSubnet; |
| 86 | import static org.onosproject.openstacknetworking.util.OpenstackNetworkingUtil.externalPeerRouterFromSubnet; |
Hyunsun Moon | 0d45736 | 2017-06-27 17:19:41 +0900 | [diff] [blame] | 87 | import static org.onosproject.openstacknode.api.OpenstackNode.NodeType.GATEWAY; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 88 | import static org.slf4j.LoggerFactory.getLogger; |
| 89 | |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 90 | /** |
| 91 | * Handles ICMP packet received from a gateway node. |
| 92 | * For a request for virtual network subnet gateway, it generates fake ICMP reply. |
| 93 | * For a request for the external network, it does source NAT with the public IP and |
| 94 | * forward the request to the external only if the requested virtual subnet has |
| 95 | * external connectivity. |
| 96 | */ |
| 97 | @Component(immediate = true) |
| 98 | public class OpenstackRoutingIcmpHandler { |
| 99 | |
| 100 | protected final Logger log = getLogger(getClass()); |
| 101 | |
| 102 | private static final String ERR_REQ = "Failed to handle ICMP request: "; |
sangho | 247232c | 2017-08-24 17:22:08 +0900 | [diff] [blame] | 103 | private static final String ERR_DUPLICATE = " already exists"; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 104 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 105 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 106 | protected CoreService coreService; |
| 107 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 108 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 109 | protected PacketService packetService; |
| 110 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 111 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
sangho | 247232c | 2017-08-24 17:22:08 +0900 | [diff] [blame] | 112 | protected StorageService storageService; |
| 113 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 114 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 115 | protected OpenstackNodeService osNodeService; |
| 116 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 117 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 118 | protected InstancePortService instancePortService; |
| 119 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 120 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 121 | protected OpenstackNetworkService osNetworkService; |
| 122 | |
Ray Milkey | d84f89b | 2018-08-17 14:54:17 -0700 | [diff] [blame] | 123 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 124 | protected OpenstackRouterService osRouterService; |
| 125 | |
Ray Milkey | 5739b2c | 2018-11-06 14:04:51 -0800 | [diff] [blame] | 126 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 127 | protected LeadershipService leadershipService; |
| 128 | |
Ray Milkey | 5739b2c | 2018-11-06 14:04:51 -0800 | [diff] [blame] | 129 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 130 | protected OpenstackFlowRuleService osFlowRuleService; |
| 131 | |
Ray Milkey | 5739b2c | 2018-11-06 14:04:51 -0800 | [diff] [blame] | 132 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 133 | protected ClusterService clusterService; |
| 134 | |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 135 | private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| 136 | groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
sangho | 072c4dd | 2017-05-17 10:45:21 +0900 | [diff] [blame] | 137 | private final InternalPacketProcessor packetProcessor = new InternalPacketProcessor(); |
sangho | 247232c | 2017-08-24 17:22:08 +0900 | [diff] [blame] | 138 | private ConsistentMap<String, InstancePort> icmpInfoMap; |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 139 | private final OpenstackNodeListener osNodeListener = new InternalNodeEventListener(); |
sangho | 247232c | 2017-08-24 17:22:08 +0900 | [diff] [blame] | 140 | |
| 141 | private static final KryoNamespace SERIALIZER_ICMP_MAP = KryoNamespace.newBuilder() |
| 142 | .register(KryoNamespaces.API) |
| 143 | .register(InstancePort.class) |
Jian Li | ec5c32b | 2018-07-13 14:28:58 +0900 | [diff] [blame] | 144 | .register(DefaultInstancePort.class) |
| 145 | .register(InstancePort.State.class) |
sangho | 247232c | 2017-08-24 17:22:08 +0900 | [diff] [blame] | 146 | .build(); |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 147 | |
| 148 | private ApplicationId appId; |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 149 | private NodeId localNodeId; |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 150 | |
| 151 | @Activate |
| 152 | protected void activate() { |
| 153 | appId = coreService.registerApplication(OPENSTACK_NETWORKING_APP_ID); |
| 154 | packetService.addProcessor(packetProcessor, PacketProcessor.director(1)); |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 155 | localNodeId = clusterService.getLocalNode().id(); |
| 156 | leadershipService.runForLeadership(appId.name()); |
| 157 | osNodeService.addListener(osNodeListener); |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 158 | |
sangho | 247232c | 2017-08-24 17:22:08 +0900 | [diff] [blame] | 159 | icmpInfoMap = storageService.<String, InstancePort>consistentMapBuilder() |
| 160 | .withSerializer(Serializer.using(SERIALIZER_ICMP_MAP)) |
| 161 | .withName("openstack-icmpmap") |
| 162 | .withApplicationId(appId) |
| 163 | .build(); |
| 164 | |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 165 | log.info("Started"); |
| 166 | } |
| 167 | |
| 168 | @Deactivate |
| 169 | protected void deactivate() { |
| 170 | packetService.removeProcessor(packetProcessor); |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 171 | eventExecutor.shutdown(); |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 172 | leadershipService.withdraw(appId.name()); |
| 173 | osNodeService.removeListener(osNodeListener); |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 174 | |
| 175 | log.info("Stopped"); |
| 176 | } |
| 177 | |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 178 | private class InternalNodeEventListener implements OpenstackNodeListener { |
| 179 | @Override |
| 180 | public boolean isRelevant(OpenstackNodeEvent event) { |
Jian Li | 34220ea | 2018-11-14 01:30:24 +0900 | [diff] [blame] | 181 | return event.subject().type() == GATEWAY; |
| 182 | } |
| 183 | |
| 184 | private boolean isRelevantHelper() { |
| 185 | return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | @Override |
| 189 | public void event(OpenstackNodeEvent event) { |
| 190 | OpenstackNode osNode = event.subject(); |
| 191 | switch (event.type()) { |
| 192 | case OPENSTACK_NODE_COMPLETE: |
Jian Li | 6a47fd0 | 2018-11-27 21:51:03 +0900 | [diff] [blame] | 193 | eventExecutor.execute(() -> processNodeCompletion(osNode)); |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 194 | break; |
| 195 | case OPENSTACK_NODE_INCOMPLETE: |
Jian Li | 6a47fd0 | 2018-11-27 21:51:03 +0900 | [diff] [blame] | 196 | eventExecutor.execute(() -> processNodeInCompletion(osNode)); |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 197 | break; |
| 198 | default: |
| 199 | break; |
| 200 | } |
| 201 | } |
| 202 | |
Jian Li | 6a47fd0 | 2018-11-27 21:51:03 +0900 | [diff] [blame] | 203 | private void processNodeCompletion(OpenstackNode osNode) { |
| 204 | if (!isRelevantHelper()) { |
| 205 | return; |
| 206 | } |
| 207 | |
| 208 | setIcmpReplyRules(osNode.intgBridge(), true); |
| 209 | } |
| 210 | |
| 211 | private void processNodeInCompletion(OpenstackNode osNode) { |
| 212 | if (!isRelevantHelper()) { |
| 213 | return; |
| 214 | } |
| 215 | |
| 216 | setIcmpReplyRules(osNode.intgBridge(), false); |
| 217 | } |
| 218 | |
Daniel Park | 6a2d95e | 2018-11-05 18:50:16 +0900 | [diff] [blame] | 219 | private void setIcmpReplyRules(DeviceId deviceId, boolean install) { |
| 220 | // Sends ICMP response to controller for SNATing ingress traffic |
| 221 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 222 | .matchEthType(Ethernet.TYPE_IPV4) |
| 223 | .matchIPProtocol(IPv4.PROTOCOL_ICMP) |
| 224 | .matchIcmpType(ICMP.TYPE_ECHO_REPLY) |
| 225 | .build(); |
| 226 | |
| 227 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 228 | .punt() |
| 229 | .build(); |
| 230 | |
| 231 | osFlowRuleService.setRule( |
| 232 | appId, |
| 233 | deviceId, |
| 234 | selector, |
| 235 | treatment, |
| 236 | PRIORITY_INTERNAL_ROUTING_RULE, |
| 237 | GW_COMMON_TABLE, |
| 238 | install); |
| 239 | } |
| 240 | } |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 241 | |
| 242 | private class InternalPacketProcessor implements PacketProcessor { |
| 243 | |
| 244 | @Override |
| 245 | public void process(PacketContext context) { |
| 246 | if (context.isHandled()) { |
| 247 | return; |
| 248 | } |
| 249 | |
| 250 | eventExecutor.execute(() -> { |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 251 | |
Jian Li | 34220ea | 2018-11-14 01:30:24 +0900 | [diff] [blame] | 252 | if (!isRelevantHelper(context)) { |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 253 | return; |
| 254 | } |
| 255 | |
| 256 | InboundPacket pkt = context.inPacket(); |
| 257 | Ethernet ethernet = pkt.parsed(); |
| 258 | if (ethernet == null || ethernet.getEtherType() != Ethernet.TYPE_IPV4) { |
| 259 | return; |
| 260 | } |
| 261 | |
| 262 | IPv4 iPacket = (IPv4) ethernet.getPayload(); |
| 263 | |
| 264 | if (iPacket.getProtocol() == IPv4.PROTOCOL_ICMP) { |
| 265 | processIcmpPacket(context, ethernet); |
| 266 | } |
| 267 | }); |
| 268 | } |
| 269 | |
Jian Li | 34220ea | 2018-11-14 01:30:24 +0900 | [diff] [blame] | 270 | private boolean isRelevantHelper(PacketContext context) { |
| 271 | Set<DeviceId> gateways = osNodeService.completeNodes(GATEWAY) |
| 272 | .stream().map(OpenstackNode::intgBridge) |
| 273 | .collect(Collectors.toSet()); |
| 274 | |
| 275 | return gateways.contains(context.inPacket().receivedFrom().deviceId()); |
| 276 | } |
| 277 | |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 278 | private void processIcmpPacket(PacketContext context, Ethernet ethernet) { |
| 279 | IPv4 ipPacket = (IPv4) ethernet.getPayload(); |
| 280 | ICMP icmp = (ICMP) ipPacket.getPayload(); |
| 281 | log.trace("Processing ICMP packet source MAC:{}, source IP:{}," + |
| 282 | "dest MAC:{}, dest IP:{}", |
| 283 | ethernet.getSourceMAC(), |
| 284 | IpAddress.valueOf(ipPacket.getSourceAddress()), |
| 285 | ethernet.getDestinationMAC(), |
| 286 | IpAddress.valueOf(ipPacket.getDestinationAddress())); |
| 287 | |
| 288 | switch (icmp.getIcmpType()) { |
| 289 | case TYPE_ECHO_REQUEST: |
| 290 | if (handleEchoRequest(context.inPacket().receivedFrom().deviceId(), |
Jian Li | 6a47fd0 | 2018-11-27 21:51:03 +0900 | [diff] [blame] | 291 | ethernet.getSourceMAC(), ipPacket, icmp)) { |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 292 | context.block(); |
| 293 | } |
| 294 | break; |
| 295 | case TYPE_ECHO_REPLY: |
| 296 | if (handleEchoReply(ipPacket, icmp)) { |
| 297 | context.block(); |
| 298 | } |
| 299 | break; |
| 300 | default: |
| 301 | break; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | private boolean handleEchoRequest(DeviceId srcDevice, MacAddress srcMac, IPv4 ipPacket, |
| 306 | ICMP icmp) { |
Jian Li | 5ecfd1a | 2018-12-10 11:41:03 +0900 | [diff] [blame] | 307 | // we only handles a request from an instance port |
| 308 | // in case of ehco request to SNAT ip address from an external router, |
| 309 | // we intentionally ignore it |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 310 | InstancePort instPort = instancePortService.instancePort(srcMac); |
| 311 | if (instPort == null) { |
| 312 | log.warn(ERR_REQ + "unknown source host(MAC:{})", srcMac); |
| 313 | return false; |
| 314 | } |
| 315 | |
| 316 | IpAddress srcIp = IpAddress.valueOf(ipPacket.getSourceAddress()); |
| 317 | IpAddress dstIp = IpAddress.valueOf(ipPacket.getDestinationAddress()); |
| 318 | |
| 319 | Subnet srcSubnet = getSourceSubnet(instPort); |
| 320 | if (srcSubnet == null) { |
| 321 | log.warn(ERR_REQ + "unknown source subnet(IP:{})", srcIp); |
| 322 | return false; |
| 323 | } |
| 324 | |
| 325 | if (Strings.isNullOrEmpty(srcSubnet.getGateway())) { |
| 326 | log.warn(ERR_REQ + "source subnet(ID:{}, CIDR:{}) has no gateway", |
| 327 | srcSubnet.getId(), srcSubnet.getCidr()); |
| 328 | return false; |
| 329 | } |
| 330 | |
| 331 | if (isForSubnetGateway(IpAddress.valueOf(ipPacket.getDestinationAddress()), |
| 332 | srcSubnet)) { |
| 333 | // this is a request to a subnet gateway |
| 334 | log.trace("Icmp request to gateway {} from {}", dstIp, srcIp); |
| 335 | processRequestForGateway(ipPacket, instPort); |
| 336 | } else { |
| 337 | // this is a request to an external network |
| 338 | log.trace("Icmp request to external {} from {}", dstIp, srcIp); |
| 339 | |
Jian Li | 5ecfd1a | 2018-12-10 11:41:03 +0900 | [diff] [blame] | 340 | IpAddress externalIp = externalIpFromSubnet(srcSubnet, |
| 341 | osRouterService, osNetworkService); |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 342 | if (externalIp == null) { |
| 343 | log.warn(ERR_REQ + "failed to get external ip"); |
| 344 | return false; |
| 345 | } |
| 346 | |
Jian Li | ebde74d | 2018-11-14 00:18:57 +0900 | [diff] [blame] | 347 | ExternalPeerRouter externalPeerRouter = |
Jian Li | 5ecfd1a | 2018-12-10 11:41:03 +0900 | [diff] [blame] | 348 | externalPeerRouterFromSubnet(srcSubnet, |
| 349 | osRouterService, osNetworkService); |
Jian Li | ebde74d | 2018-11-14 00:18:57 +0900 | [diff] [blame] | 350 | if (externalPeerRouter == null) { |
| 351 | log.warn(ERR_REQ + "failed to get external peer router"); |
| 352 | return false; |
| 353 | } |
| 354 | |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 355 | String icmpInfoKey = icmpInfoKey(icmp, |
| 356 | externalIp.toString(), |
| 357 | IPv4.fromIPv4Address(ipPacket.getDestinationAddress())); |
| 358 | log.trace("Created icmpInfo key is {}", icmpInfoKey); |
| 359 | |
| 360 | sendRequestForExternal(ipPacket, srcDevice, externalIp, externalPeerRouter); |
| 361 | |
| 362 | try { |
| 363 | icmpInfoMap.compute(icmpInfoKey, (id, existing) -> { |
| 364 | checkArgument(existing == null, ERR_DUPLICATE); |
| 365 | return instPort; |
| 366 | }); |
| 367 | } catch (IllegalArgumentException e) { |
| 368 | log.warn("IllegalArgumentException occurred because of {}", e.toString()); |
| 369 | return false; |
| 370 | } |
| 371 | } |
| 372 | return true; |
| 373 | } |
| 374 | |
| 375 | private String icmpInfoKey(ICMP icmp, String srcIp, String dstIp) { |
| 376 | return String.valueOf(getIcmpId(icmp)) |
| 377 | .concat(srcIp) |
| 378 | .concat(dstIp); |
| 379 | } |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 380 | |
| 381 | private boolean handleEchoReply(IPv4 ipPacket, ICMP icmp) { |
| 382 | String icmpInfoKey = icmpInfoKey(icmp, |
| 383 | IPv4.fromIPv4Address(ipPacket.getDestinationAddress()), |
| 384 | IPv4.fromIPv4Address(ipPacket.getSourceAddress())); |
| 385 | log.trace("Retrieved icmpInfo key is {}", icmpInfoKey); |
| 386 | |
| 387 | if (icmpInfoMap.get(icmpInfoKey) != null) { |
| 388 | processReplyFromExternal(ipPacket, icmpInfoMap.get(icmpInfoKey).value()); |
| 389 | icmpInfoMap.remove(icmpInfoKey); |
| 390 | return true; |
| 391 | } else { |
| 392 | log.debug("No ICMP Info for ICMP packet"); |
| 393 | return false; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | private Subnet getSourceSubnet(InstancePort instance) { |
| 398 | checkNotNull(instance); |
| 399 | |
| 400 | Port osPort = osNetworkService.port(instance.portId()); |
| 401 | return osNetworkService.subnets(osPort.getNetworkId()) |
| 402 | .stream().findAny().orElse(null); |
| 403 | } |
| 404 | |
| 405 | private boolean isForSubnetGateway(IpAddress dstIp, Subnet srcSubnet) { |
| 406 | RouterInterface osRouterIface = osRouterService.routerInterfaces().stream() |
| 407 | .filter(i -> Objects.equals(i.getSubnetId(), srcSubnet.getId())) |
| 408 | .findAny().orElse(null); |
| 409 | if (osRouterIface == null) { |
| 410 | log.trace(ERR_REQ + "source subnet(ID:{}, CIDR:{}) has no router", |
| 411 | srcSubnet.getId(), srcSubnet.getCidr()); |
| 412 | return false; |
| 413 | } |
| 414 | |
| 415 | Router osRouter = osRouterService.router(osRouterIface.getId()); |
Jian Li | 5ecfd1a | 2018-12-10 11:41:03 +0900 | [diff] [blame] | 416 | Set<IpAddress> routableGateways = |
| 417 | osRouterService.routerInterfaces(osRouter.getId()) |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 418 | .stream() |
| 419 | .map(iface -> osNetworkService.subnet(iface.getSubnetId()).getGateway()) |
| 420 | .map(IpAddress::valueOf) |
| 421 | .collect(Collectors.toSet()); |
| 422 | |
| 423 | return routableGateways.contains(dstIp); |
| 424 | } |
| 425 | |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 426 | private void processRequestForGateway(IPv4 ipPacket, InstancePort instPort) { |
| 427 | ICMP icmpReq = (ICMP) ipPacket.getPayload(); |
| 428 | icmpReq.setChecksum((short) 0); |
| 429 | icmpReq.setIcmpType(TYPE_ECHO_REPLY); |
| 430 | |
| 431 | int destinationAddress = ipPacket.getSourceAddress(); |
| 432 | |
| 433 | ipPacket.setSourceAddress(ipPacket.getDestinationAddress()) |
| 434 | .setDestinationAddress(destinationAddress) |
| 435 | .resetChecksum(); |
| 436 | |
| 437 | ipPacket.setPayload(icmpReq); |
| 438 | Ethernet icmpReply = new Ethernet(); |
| 439 | icmpReply.setEtherType(Ethernet.TYPE_IPV4) |
| 440 | .setSourceMACAddress(Constants.DEFAULT_GATEWAY_MAC) |
| 441 | .setDestinationMACAddress(instPort.macAddress()) |
| 442 | .setPayload(ipPacket); |
| 443 | |
| 444 | sendReply(icmpReply, instPort); |
| 445 | } |
| 446 | |
Jian Li | 5ecfd1a | 2018-12-10 11:41:03 +0900 | [diff] [blame] | 447 | private void sendRequestForExternal(IPv4 ipPacket, |
| 448 | DeviceId srcDevice, |
| 449 | IpAddress srcNatIp, |
| 450 | ExternalPeerRouter externalPeerRouter) { |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 451 | ICMP icmpReq = (ICMP) ipPacket.getPayload(); |
| 452 | icmpReq.resetChecksum(); |
| 453 | ipPacket.setSourceAddress(srcNatIp.getIp4Address().toInt()).resetChecksum(); |
| 454 | ipPacket.setPayload(icmpReq); |
| 455 | |
| 456 | Ethernet icmpRequestEth = new Ethernet(); |
| 457 | icmpRequestEth.setEtherType(Ethernet.TYPE_IPV4) |
| 458 | .setSourceMACAddress(DEFAULT_GATEWAY_MAC) |
| 459 | .setDestinationMACAddress(externalPeerRouter.macAddress()); |
| 460 | |
| 461 | if (!externalPeerRouter.vlanId().equals(VlanId.NONE)) { |
| 462 | icmpRequestEth.setVlanID(externalPeerRouter.vlanId().toShort()); |
| 463 | } |
| 464 | |
| 465 | icmpRequestEth.setPayload(ipPacket); |
| 466 | |
| 467 | OpenstackNode osNode = osNodeService.node(srcDevice); |
| 468 | if (osNode == null) { |
| 469 | final String error = String.format("Cannot find openstack node for %s", |
| 470 | srcDevice); |
| 471 | throw new IllegalStateException(error); |
| 472 | } |
| 473 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 474 | .setOutput(osNode.uplinkPortNum()) |
| 475 | .build(); |
| 476 | |
| 477 | OutboundPacket packet = new DefaultOutboundPacket( |
| 478 | srcDevice, |
| 479 | treatment, |
| 480 | ByteBuffer.wrap(icmpRequestEth.serialize())); |
| 481 | |
| 482 | packetService.emit(packet); |
| 483 | } |
| 484 | |
| 485 | private void processReplyFromExternal(IPv4 ipPacket, InstancePort instPort) { |
| 486 | |
| 487 | if (instPort.networkId() == null) { |
| 488 | return; |
| 489 | } |
| 490 | |
| 491 | ICMP icmpReply = (ICMP) ipPacket.getPayload(); |
| 492 | |
| 493 | icmpReply.resetChecksum(); |
| 494 | |
| 495 | ipPacket.setDestinationAddress(instPort.ipAddress().getIp4Address().toInt()) |
| 496 | .resetChecksum(); |
| 497 | ipPacket.setPayload(icmpReply); |
| 498 | |
| 499 | Ethernet icmpResponseEth = new Ethernet(); |
| 500 | icmpResponseEth.setEtherType(Ethernet.TYPE_IPV4) |
| 501 | .setSourceMACAddress(Constants.DEFAULT_GATEWAY_MAC) |
| 502 | .setDestinationMACAddress(instPort.macAddress()) |
| 503 | .setPayload(ipPacket); |
| 504 | |
| 505 | sendReply(icmpResponseEth, instPort); |
| 506 | } |
| 507 | |
| 508 | private void sendReply(Ethernet icmpReply, InstancePort instPort) { |
| 509 | TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder() |
| 510 | .setOutput(instPort.portNumber()); |
| 511 | |
| 512 | String netId = instPort.networkId(); |
| 513 | String segId = osNetworkService.segmentId(netId); |
| 514 | |
| 515 | switch (osNetworkService.networkType(netId)) { |
| 516 | case VXLAN: |
Jian Li | 2d68c19 | 2018-12-13 15:52:59 +0900 | [diff] [blame] | 517 | case GRE: |
Jian Li | 2868044 | 2018-11-11 00:35:37 +0900 | [diff] [blame] | 518 | tBuilder.setTunnelId(Long.valueOf(segId)); |
| 519 | break; |
| 520 | case VLAN: |
| 521 | tBuilder.setVlanId(VlanId.vlanId(segId)); |
| 522 | break; |
| 523 | default: |
| 524 | break; |
| 525 | } |
| 526 | |
| 527 | OutboundPacket packet = new DefaultOutboundPacket( |
| 528 | instPort.deviceId(), |
| 529 | tBuilder.build(), |
| 530 | ByteBuffer.wrap(icmpReply.serialize())); |
| 531 | |
| 532 | packetService.emit(packet); |
| 533 | } |
| 534 | |
| 535 | private short getIcmpId(ICMP icmp) { |
| 536 | return ((ICMPEcho) icmp.getPayload()).getIdentifier(); |
| 537 | } |
| 538 | } |
Jian Li | 2d68c19 | 2018-12-13 15:52:59 +0900 | [diff] [blame] | 539 | |
Hyunsun Moon | 44aac66 | 2017-02-18 02:07:01 +0900 | [diff] [blame] | 540 | } |