sangho | 0c2a3da | 2016-02-16 13:39:07 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Open Networking Laboratory |
| 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 | * |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
sangho | 0c2a3da | 2016-02-16 13:39:07 +0900 | [diff] [blame] | 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.routing; |
| 17 | |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 18 | import com.google.common.collect.Maps; |
| 19 | import org.onlab.packet.Ethernet; |
| 20 | import org.onlab.packet.ICMP; |
| 21 | import org.onlab.packet.IPv4; |
| 22 | import org.onlab.packet.Ip4Address; |
| 23 | import org.onlab.packet.MacAddress; |
| 24 | import org.onosproject.core.ApplicationId; |
| 25 | import org.onosproject.net.DeviceId; |
| 26 | import org.onosproject.net.Port; |
| 27 | import org.onosproject.net.PortNumber; |
| 28 | import org.onosproject.net.device.DeviceService; |
| 29 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 30 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 31 | import org.onosproject.net.flow.TrafficSelector; |
| 32 | import org.onosproject.net.flow.TrafficTreatment; |
| 33 | import org.onosproject.net.packet.DefaultOutboundPacket; |
| 34 | import org.onosproject.net.packet.OutboundPacket; |
sangho | 0c2a3da | 2016-02-16 13:39:07 +0900 | [diff] [blame] | 35 | import org.onosproject.net.packet.PacketContext; |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 36 | import org.onosproject.net.packet.PacketPriority; |
| 37 | import org.onosproject.net.packet.PacketService; |
| 38 | import org.onosproject.openstackinterface.OpenstackInterfaceService; |
| 39 | import org.onosproject.openstackinterface.OpenstackPort; |
| 40 | import org.onosproject.openstacknetworking.OpenstackPortInfo; |
| 41 | import org.onosproject.openstacknetworking.OpenstackSwitchingService; |
| 42 | import org.slf4j.Logger; |
| 43 | |
| 44 | import java.nio.ByteBuffer; |
| 45 | import java.util.Map; |
| 46 | import java.util.Optional; |
| 47 | |
| 48 | import static com.google.common.base.Preconditions.checkNotNull; |
| 49 | |
| 50 | import static org.slf4j.LoggerFactory.getLogger; |
| 51 | |
sangho | 0c2a3da | 2016-02-16 13:39:07 +0900 | [diff] [blame] | 52 | |
| 53 | /** |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 54 | * Handle ICMP packet sent from Openstack Gateway nodes. |
sangho | 0c2a3da | 2016-02-16 13:39:07 +0900 | [diff] [blame] | 55 | */ |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 56 | public class OpenstackIcmpHandler { |
| 57 | protected final Logger log = getLogger(getClass()); |
sangho | 0c2a3da | 2016-02-16 13:39:07 +0900 | [diff] [blame] | 58 | |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 59 | private final PacketService packetService; |
| 60 | private final DeviceService deviceService; |
| 61 | private final Map<String, OpenstackPortInfo> icmpInfoMap = Maps.newHashMap(); |
| 62 | private final OpenstackSwitchingService openstackSwitchingService; |
| 63 | private final OpenstackInterfaceService openstackService; |
| 64 | private final OpenstackRoutingConfig config; |
| 65 | private static final MacAddress GATEWAY_MAC = MacAddress.valueOf("1f:1f:1f:1f:1f:1f"); |
| 66 | private static final String NETWORK_ROUTER_INTERFACE = "network:router_interface"; |
| 67 | private static final String PORTNAME = "portName"; |
| 68 | |
| 69 | /** |
| 70 | * Default constructor. |
| 71 | * |
| 72 | * @param packetService packet service |
| 73 | * @param deviceService device service |
| 74 | * @param openstackService openstackInterface service |
| 75 | * @param config openstackRoutingConfig |
| 76 | * @param openstackSwitchingService openstackSwitching service |
| 77 | */ |
| 78 | OpenstackIcmpHandler(PacketService packetService, DeviceService deviceService, |
| 79 | OpenstackInterfaceService openstackService, OpenstackRoutingConfig config, |
| 80 | OpenstackSwitchingService openstackSwitchingService) { |
| 81 | this.packetService = packetService; |
| 82 | this.deviceService = deviceService; |
| 83 | this.openstackService = checkNotNull(openstackService); |
| 84 | this.config = checkNotNull(config); |
| 85 | this.openstackSwitchingService = checkNotNull(openstackSwitchingService); |
sangho | 0c2a3da | 2016-02-16 13:39:07 +0900 | [diff] [blame] | 86 | } |
| 87 | |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 88 | /** |
| 89 | * Requests ICMP packet. |
| 90 | * |
| 91 | * @param appId Application Id |
| 92 | */ |
| 93 | public void requestPacket(ApplicationId appId) { |
| 94 | TrafficSelector icmpSelector = DefaultTrafficSelector.builder() |
| 95 | .matchEthType(Ethernet.TYPE_IPV4) |
| 96 | .matchIPProtocol(IPv4.PROTOCOL_ICMP) |
| 97 | .build(); |
| 98 | |
| 99 | packetService.requestPackets(icmpSelector, |
| 100 | PacketPriority.CONTROL, |
| 101 | appId, |
| 102 | Optional.of(DeviceId.deviceId(config.gatewayBridgeId()))); |
sangho | 0c2a3da | 2016-02-16 13:39:07 +0900 | [diff] [blame] | 103 | } |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 104 | |
| 105 | /** |
| 106 | * Handles ICMP packet. |
| 107 | * |
| 108 | * @param context packet context |
| 109 | * @param ethernet ethernet |
| 110 | */ |
| 111 | public void processIcmpPacket(PacketContext context, Ethernet ethernet) { |
| 112 | checkNotNull(context, "context can not be null"); |
| 113 | checkNotNull(ethernet, "ethernet can not be null"); |
| 114 | |
| 115 | IPv4 ipPacket = (IPv4) ethernet.getPayload(); |
| 116 | |
| 117 | log.debug("icmpEvent called from ip {}, mac {}", Ip4Address.valueOf(ipPacket.getSourceAddress()).toString(), |
| 118 | ethernet.getSourceMAC().toString()); |
| 119 | |
| 120 | ICMP icmp = (ICMP) ipPacket.getPayload(); |
| 121 | short icmpId = getIcmpId(icmp); |
| 122 | |
| 123 | DeviceId deviceId = context.inPacket().receivedFrom().deviceId(); |
| 124 | if (icmp.getIcmpType() == ICMP.TYPE_ECHO_REQUEST) { |
| 125 | //TODO: Considers icmp between internal subnets which are belonged to the same router. |
| 126 | |
| 127 | OpenstackPortInfo openstackPortInfo = |
| 128 | getOpenstackPortInfo(Ip4Address.valueOf(ipPacket.getSourceAddress()), ethernet.getSourceMAC()); |
| 129 | |
| 130 | checkNotNull(openstackPortInfo, "openstackPortInfo can not be null"); |
| 131 | |
| 132 | if (ipPacket.getDestinationAddress() == openstackPortInfo.gatewayIP().toInt()) { |
| 133 | processIcmpPacketSentToGateway(ipPacket, icmp, openstackPortInfo); |
| 134 | } else { |
| 135 | Ip4Address pNatIpAddress = pNatIpForPort(openstackPortInfo); |
| 136 | checkNotNull(pNatIpAddress, "pNatIpAddress can not be null"); |
| 137 | |
| 138 | sendRequestPacketToExt(ipPacket, icmp, deviceId, pNatIpAddress); |
| 139 | |
| 140 | String icmpInfoKey = String.valueOf(icmpId) |
| 141 | .concat(String.valueOf(pNatIpAddress.toInt())) |
| 142 | .concat(String.valueOf(ipPacket.getDestinationAddress())); |
| 143 | icmpInfoMap.putIfAbsent(icmpInfoKey, openstackPortInfo); |
| 144 | } |
| 145 | } else if (icmp.getIcmpType() == ICMP.TYPE_ECHO_REPLY) { |
| 146 | String icmpInfoKey = String.valueOf(icmpId) |
| 147 | .concat(String.valueOf(ipPacket.getDestinationAddress())) |
| 148 | .concat(String.valueOf(ipPacket.getSourceAddress())); |
| 149 | |
| 150 | processResponsePacketFromExternalToHost(ipPacket, icmp, icmpInfoMap.get(icmpInfoKey)); |
| 151 | |
| 152 | icmpInfoMap.remove(icmpInfoKey); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | private void processIcmpPacketSentToGateway(IPv4 icmpRequestIpv4, ICMP icmpRequest, |
| 157 | OpenstackPortInfo openstackPortInfo) { |
| 158 | icmpRequest.setIcmpType(ICMP.TYPE_ECHO_REPLY) |
| 159 | .resetChecksum(); |
| 160 | |
| 161 | icmpRequestIpv4.setSourceAddress(icmpRequestIpv4.getDestinationAddress()) |
| 162 | .setDestinationAddress(openstackPortInfo.ip().toInt()) |
| 163 | .resetChecksum(); |
| 164 | |
| 165 | icmpRequestIpv4.setPayload(icmpRequest); |
| 166 | |
| 167 | Ethernet icmpResponseEth = new Ethernet(); |
| 168 | |
| 169 | icmpResponseEth.setEtherType(Ethernet.TYPE_IPV4) |
| 170 | .setSourceMACAddress(GATEWAY_MAC) |
| 171 | .setDestinationMACAddress(openstackPortInfo.mac()) |
| 172 | .setPayload(icmpRequestIpv4); |
| 173 | |
| 174 | sendResponsePacketToHost(icmpResponseEth, openstackPortInfo); |
| 175 | } |
| 176 | |
| 177 | private void sendRequestPacketToExt(IPv4 icmpRequestIpv4, ICMP icmpRequest, DeviceId deviceId, |
| 178 | Ip4Address pNatIpAddress) { |
| 179 | icmpRequest.resetChecksum(); |
| 180 | icmpRequestIpv4.setSourceAddress(pNatIpAddress.toInt()) |
| 181 | .resetChecksum(); |
| 182 | icmpRequestIpv4.setPayload(icmpRequest); |
| 183 | |
| 184 | Ethernet icmpRequestEth = new Ethernet(); |
| 185 | |
| 186 | icmpRequestEth.setEtherType(Ethernet.TYPE_IPV4) |
| 187 | .setSourceMACAddress(MacAddress.valueOf(config.gatewayExternalInterfaceMac())) |
| 188 | .setDestinationMACAddress(MacAddress.valueOf(config.physicalRouterMac())) |
| 189 | .setPayload(icmpRequestIpv4); |
| 190 | |
| 191 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 192 | .setOutput(getPortForAnnotationPortName(DeviceId.deviceId(config.gatewayBridgeId()), |
| 193 | config.gatewayExternalInterfaceName())) |
| 194 | .build(); |
| 195 | |
| 196 | OutboundPacket packet = new DefaultOutboundPacket(deviceId, |
| 197 | treatment, ByteBuffer.wrap(icmpRequestEth.serialize())); |
| 198 | |
| 199 | packetService.emit(packet); |
| 200 | } |
| 201 | |
| 202 | private void processResponsePacketFromExternalToHost(IPv4 icmpResponseIpv4, ICMP icmpResponse, |
| 203 | OpenstackPortInfo openstackPortInfo) { |
| 204 | icmpResponse.resetChecksum(); |
| 205 | |
| 206 | icmpResponseIpv4.setDestinationAddress(openstackPortInfo.ip().toInt()) |
| 207 | .resetChecksum(); |
| 208 | icmpResponseIpv4.setPayload(icmpResponse); |
| 209 | |
| 210 | Ethernet icmpResponseEth = new Ethernet(); |
| 211 | |
| 212 | icmpResponseEth.setEtherType(Ethernet.TYPE_IPV4) |
| 213 | .setSourceMACAddress(GATEWAY_MAC) |
| 214 | .setDestinationMACAddress(openstackPortInfo.mac()) |
| 215 | .setPayload(icmpResponseIpv4); |
| 216 | |
| 217 | sendResponsePacketToHost(icmpResponseEth, openstackPortInfo); |
| 218 | } |
| 219 | |
| 220 | private void sendResponsePacketToHost(Ethernet icmpResponseEth, OpenstackPortInfo openstackPortInfo) { |
| 221 | Map.Entry<String, OpenstackPortInfo> entry = openstackSwitchingService.openstackPortInfo().entrySet().stream() |
| 222 | .filter(e -> e.getValue().mac().equals(openstackPortInfo.mac())) |
| 223 | .findAny().orElse(null); |
| 224 | |
| 225 | if (entry == null) { |
| 226 | return; |
| 227 | } |
| 228 | |
| 229 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 230 | .setOutput(getPortForAnnotationPortName(openstackPortInfo.deviceId(), entry.getKey())) |
| 231 | .build(); |
| 232 | |
| 233 | OutboundPacket packet = new DefaultOutboundPacket(openstackPortInfo.deviceId(), |
| 234 | treatment, ByteBuffer.wrap(icmpResponseEth.serialize())); |
| 235 | |
| 236 | packetService.emit(packet); |
| 237 | } |
| 238 | |
| 239 | private OpenstackPortInfo getOpenstackPortInfo(Ip4Address sourceIp, MacAddress sourceMac) { |
| 240 | checkNotNull(openstackSwitchingService.openstackPortInfo(), "openstackportinfo collection can not be null"); |
| 241 | |
| 242 | return openstackSwitchingService.openstackPortInfo().values() |
| 243 | .stream().filter(p -> p.ip().equals(sourceIp) && p.mac().equals(sourceMac)) |
| 244 | .findAny().orElse(null); |
| 245 | } |
| 246 | |
| 247 | private short getIcmpId(ICMP icmp) { |
| 248 | return ByteBuffer.wrap(icmp.serialize(), 4, 2).getShort(); |
| 249 | } |
| 250 | |
| 251 | private Ip4Address pNatIpForPort(OpenstackPortInfo openstackPortInfo) { |
| 252 | |
| 253 | OpenstackPort openstackPort = openstackService.ports().stream() |
| 254 | .filter(p -> p.deviceOwner().equals(NETWORK_ROUTER_INTERFACE) && |
| 255 | p.networkId().equals(openstackPortInfo.networkId())) |
| 256 | .findAny().orElse(null); |
| 257 | |
| 258 | checkNotNull(openstackPort, "openstackPort can not be null"); |
| 259 | |
| 260 | return openstackService.router(openstackPort.deviceId()) |
| 261 | .gatewayExternalInfo().externalFixedIps().values() |
| 262 | .stream().findAny().orElse(null); |
| 263 | } |
| 264 | |
| 265 | private PortNumber getPortForAnnotationPortName(DeviceId deviceId, String match) { |
| 266 | Port port = deviceService.getPorts(deviceId).stream() |
| 267 | .filter(p -> p.annotations().value(PORTNAME).equals(match)) |
| 268 | .findAny().orElse(null); |
| 269 | |
| 270 | checkNotNull(port, "port cannot be null"); |
| 271 | |
| 272 | return port.number(); |
| 273 | } |
| 274 | } |