| /* |
| * Copyright 2016-present Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.openstacknetworking.routing; |
| |
| import com.google.common.collect.Maps; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.ICMP; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.MacAddress; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.Port; |
| import org.onosproject.net.PortNumber; |
| import org.onosproject.net.device.DeviceService; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.packet.DefaultOutboundPacket; |
| import org.onosproject.net.packet.OutboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketPriority; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.openstackinterface.OpenstackInterfaceService; |
| import org.onosproject.openstackinterface.OpenstackPort; |
| import org.onosproject.openstacknetworking.OpenstackPortInfo; |
| import org.onosproject.openstacknetworking.OpenstackSwitchingService; |
| import org.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Map; |
| import java.util.Optional; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| |
| /** |
| * Handle ICMP packet sent from Openstack Gateway nodes. |
| */ |
| public class OpenstackIcmpHandler { |
| protected final Logger log = getLogger(getClass()); |
| |
| private final PacketService packetService; |
| private final DeviceService deviceService; |
| private final Map<String, OpenstackPortInfo> icmpInfoMap = Maps.newHashMap(); |
| private final OpenstackSwitchingService openstackSwitchingService; |
| private final OpenstackInterfaceService openstackService; |
| private final OpenstackRoutingConfig config; |
| private static final MacAddress GATEWAY_MAC = MacAddress.valueOf("1f:1f:1f:1f:1f:1f"); |
| private static final String NETWORK_ROUTER_INTERFACE = "network:router_interface"; |
| private static final String PORTNAME = "portName"; |
| |
| /** |
| * Default constructor. |
| * |
| * @param packetService packet service |
| * @param deviceService device service |
| * @param openstackService openstackInterface service |
| * @param config openstackRoutingConfig |
| * @param openstackSwitchingService openstackSwitching service |
| */ |
| OpenstackIcmpHandler(PacketService packetService, DeviceService deviceService, |
| OpenstackInterfaceService openstackService, OpenstackRoutingConfig config, |
| OpenstackSwitchingService openstackSwitchingService) { |
| this.packetService = packetService; |
| this.deviceService = deviceService; |
| this.openstackService = checkNotNull(openstackService); |
| this.config = checkNotNull(config); |
| this.openstackSwitchingService = checkNotNull(openstackSwitchingService); |
| } |
| |
| /** |
| * Requests ICMP packet. |
| * |
| * @param appId Application Id |
| */ |
| public void requestPacket(ApplicationId appId) { |
| TrafficSelector icmpSelector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_ICMP) |
| .build(); |
| |
| packetService.requestPackets(icmpSelector, |
| PacketPriority.CONTROL, |
| appId, |
| Optional.of(DeviceId.deviceId(config.gatewayBridgeId()))); |
| } |
| |
| /** |
| * Handles ICMP packet. |
| * |
| * @param context packet context |
| * @param ethernet ethernet |
| */ |
| public void processIcmpPacket(PacketContext context, Ethernet ethernet) { |
| checkNotNull(context, "context can not be null"); |
| checkNotNull(ethernet, "ethernet can not be null"); |
| |
| IPv4 ipPacket = (IPv4) ethernet.getPayload(); |
| |
| log.debug("icmpEvent called from ip {}, mac {}", Ip4Address.valueOf(ipPacket.getSourceAddress()).toString(), |
| ethernet.getSourceMAC().toString()); |
| |
| ICMP icmp = (ICMP) ipPacket.getPayload(); |
| short icmpId = getIcmpId(icmp); |
| |
| DeviceId deviceId = context.inPacket().receivedFrom().deviceId(); |
| if (icmp.getIcmpType() == ICMP.TYPE_ECHO_REQUEST) { |
| //TODO: Considers icmp between internal subnets which are belonged to the same router. |
| |
| OpenstackPortInfo openstackPortInfo = |
| getOpenstackPortInfo(Ip4Address.valueOf(ipPacket.getSourceAddress()), ethernet.getSourceMAC()); |
| |
| checkNotNull(openstackPortInfo, "openstackPortInfo can not be null"); |
| |
| if (ipPacket.getDestinationAddress() == openstackPortInfo.gatewayIP().toInt()) { |
| processIcmpPacketSentToGateway(ipPacket, icmp, openstackPortInfo); |
| } else { |
| Ip4Address pNatIpAddress = pNatIpForPort(openstackPortInfo); |
| checkNotNull(pNatIpAddress, "pNatIpAddress can not be null"); |
| |
| sendRequestPacketToExt(ipPacket, icmp, deviceId, pNatIpAddress); |
| |
| String icmpInfoKey = String.valueOf(icmpId) |
| .concat(String.valueOf(pNatIpAddress.toInt())) |
| .concat(String.valueOf(ipPacket.getDestinationAddress())); |
| icmpInfoMap.putIfAbsent(icmpInfoKey, openstackPortInfo); |
| } |
| } else if (icmp.getIcmpType() == ICMP.TYPE_ECHO_REPLY) { |
| String icmpInfoKey = String.valueOf(icmpId) |
| .concat(String.valueOf(ipPacket.getDestinationAddress())) |
| .concat(String.valueOf(ipPacket.getSourceAddress())); |
| |
| processResponsePacketFromExternalToHost(ipPacket, icmp, icmpInfoMap.get(icmpInfoKey)); |
| |
| icmpInfoMap.remove(icmpInfoKey); |
| } |
| } |
| |
| private void processIcmpPacketSentToGateway(IPv4 icmpRequestIpv4, ICMP icmpRequest, |
| OpenstackPortInfo openstackPortInfo) { |
| icmpRequest.setIcmpType(ICMP.TYPE_ECHO_REPLY) |
| .resetChecksum(); |
| |
| icmpRequestIpv4.setSourceAddress(icmpRequestIpv4.getDestinationAddress()) |
| .setDestinationAddress(openstackPortInfo.ip().toInt()) |
| .resetChecksum(); |
| |
| icmpRequestIpv4.setPayload(icmpRequest); |
| |
| Ethernet icmpResponseEth = new Ethernet(); |
| |
| icmpResponseEth.setEtherType(Ethernet.TYPE_IPV4) |
| .setSourceMACAddress(GATEWAY_MAC) |
| .setDestinationMACAddress(openstackPortInfo.mac()) |
| .setPayload(icmpRequestIpv4); |
| |
| sendResponsePacketToHost(icmpResponseEth, openstackPortInfo); |
| } |
| |
| private void sendRequestPacketToExt(IPv4 icmpRequestIpv4, ICMP icmpRequest, DeviceId deviceId, |
| Ip4Address pNatIpAddress) { |
| icmpRequest.resetChecksum(); |
| icmpRequestIpv4.setSourceAddress(pNatIpAddress.toInt()) |
| .resetChecksum(); |
| icmpRequestIpv4.setPayload(icmpRequest); |
| |
| Ethernet icmpRequestEth = new Ethernet(); |
| |
| icmpRequestEth.setEtherType(Ethernet.TYPE_IPV4) |
| .setSourceMACAddress(MacAddress.valueOf(config.gatewayExternalInterfaceMac())) |
| .setDestinationMACAddress(MacAddress.valueOf(config.physicalRouterMac())) |
| .setPayload(icmpRequestIpv4); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(getPortForAnnotationPortName(DeviceId.deviceId(config.gatewayBridgeId()), |
| config.gatewayExternalInterfaceName())) |
| .build(); |
| |
| OutboundPacket packet = new DefaultOutboundPacket(deviceId, |
| treatment, ByteBuffer.wrap(icmpRequestEth.serialize())); |
| |
| packetService.emit(packet); |
| } |
| |
| private void processResponsePacketFromExternalToHost(IPv4 icmpResponseIpv4, ICMP icmpResponse, |
| OpenstackPortInfo openstackPortInfo) { |
| icmpResponse.resetChecksum(); |
| |
| icmpResponseIpv4.setDestinationAddress(openstackPortInfo.ip().toInt()) |
| .resetChecksum(); |
| icmpResponseIpv4.setPayload(icmpResponse); |
| |
| Ethernet icmpResponseEth = new Ethernet(); |
| |
| icmpResponseEth.setEtherType(Ethernet.TYPE_IPV4) |
| .setSourceMACAddress(GATEWAY_MAC) |
| .setDestinationMACAddress(openstackPortInfo.mac()) |
| .setPayload(icmpResponseIpv4); |
| |
| sendResponsePacketToHost(icmpResponseEth, openstackPortInfo); |
| } |
| |
| private void sendResponsePacketToHost(Ethernet icmpResponseEth, OpenstackPortInfo openstackPortInfo) { |
| Map.Entry<String, OpenstackPortInfo> entry = openstackSwitchingService.openstackPortInfo().entrySet().stream() |
| .filter(e -> e.getValue().mac().equals(openstackPortInfo.mac())) |
| .findAny().orElse(null); |
| |
| if (entry == null) { |
| return; |
| } |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(getPortForAnnotationPortName(openstackPortInfo.deviceId(), entry.getKey())) |
| .build(); |
| |
| OutboundPacket packet = new DefaultOutboundPacket(openstackPortInfo.deviceId(), |
| treatment, ByteBuffer.wrap(icmpResponseEth.serialize())); |
| |
| packetService.emit(packet); |
| } |
| |
| private OpenstackPortInfo getOpenstackPortInfo(Ip4Address sourceIp, MacAddress sourceMac) { |
| checkNotNull(openstackSwitchingService.openstackPortInfo(), "openstackportinfo collection can not be null"); |
| |
| return openstackSwitchingService.openstackPortInfo().values() |
| .stream().filter(p -> p.ip().equals(sourceIp) && p.mac().equals(sourceMac)) |
| .findAny().orElse(null); |
| } |
| |
| private short getIcmpId(ICMP icmp) { |
| return ByteBuffer.wrap(icmp.serialize(), 4, 2).getShort(); |
| } |
| |
| private Ip4Address pNatIpForPort(OpenstackPortInfo openstackPortInfo) { |
| |
| OpenstackPort openstackPort = openstackService.ports().stream() |
| .filter(p -> p.deviceOwner().equals(NETWORK_ROUTER_INTERFACE) && |
| p.networkId().equals(openstackPortInfo.networkId())) |
| .findAny().orElse(null); |
| |
| checkNotNull(openstackPort, "openstackPort can not be null"); |
| |
| return openstackService.router(openstackPort.deviceId()) |
| .gatewayExternalInfo().externalFixedIps().values() |
| .stream().findAny().orElse(null); |
| } |
| |
| private PortNumber getPortForAnnotationPortName(DeviceId deviceId, String match) { |
| Port port = deviceService.getPorts(deviceId).stream() |
| .filter(p -> p.annotations().value(PORTNAME).equals(match)) |
| .findAny().orElse(null); |
| |
| checkNotNull(port, "port cannot be null"); |
| |
| return port.number(); |
| } |
| } |