Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Laboratory |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +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.routing; |
| 17 | |
| 18 | import org.onlab.packet.ARP; |
| 19 | import org.onlab.packet.EthType; |
| 20 | import org.onlab.packet.Ethernet; |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 21 | import org.onlab.packet.Ip4Address; |
| 22 | import org.onlab.packet.IpAddress; |
| 23 | import org.onlab.packet.MacAddress; |
| 24 | import org.onosproject.core.ApplicationId; |
| 25 | import org.onosproject.net.DeviceId; |
| 26 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 27 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 28 | import org.onosproject.net.flow.TrafficSelector; |
| 29 | import org.onosproject.net.flow.TrafficTreatment; |
| 30 | import org.onosproject.net.packet.DefaultOutboundPacket; |
| 31 | import org.onosproject.net.packet.PacketContext; |
| 32 | import org.onosproject.net.packet.PacketPriority; |
| 33 | import org.onosproject.net.packet.PacketService; |
| 34 | import org.onosproject.openstackinterface.OpenstackInterfaceService; |
| 35 | import org.onosproject.openstackinterface.OpenstackPort; |
sangho | 4890754 | 2016-03-28 16:07:07 +0900 | [diff] [blame] | 36 | import org.onosproject.openstacknetworking.OpenstackNetworkingConfig; |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 37 | import org.slf4j.Logger; |
| 38 | |
| 39 | import java.nio.ByteBuffer; |
| 40 | import java.util.Optional; |
| 41 | |
| 42 | import static com.google.common.base.Preconditions.checkNotNull; |
| 43 | import static org.slf4j.LoggerFactory.getLogger; |
| 44 | |
| 45 | /** |
| 46 | * Handle ARP packet sent from Openstack Gateway nodes. |
| 47 | */ |
| 48 | public class OpenstackRoutingArpHandler { |
| 49 | protected final Logger log = getLogger(getClass()); |
| 50 | |
| 51 | private final PacketService packetService; |
| 52 | private final OpenstackInterfaceService openstackService; |
sangho | 4890754 | 2016-03-28 16:07:07 +0900 | [diff] [blame] | 53 | private final OpenstackNetworkingConfig config; |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 54 | private static final String NETWORK_ROUTER_GATEWAY = "network:router_gateway"; |
| 55 | |
| 56 | /** |
| 57 | * Default constructor. |
| 58 | * |
| 59 | * @param packetService packet service |
| 60 | * @param openstackService openstackInterface service |
| 61 | * @param config openstackRoutingConfig |
| 62 | */ |
| 63 | OpenstackRoutingArpHandler(PacketService packetService, OpenstackInterfaceService openstackService, |
sangho | 4890754 | 2016-03-28 16:07:07 +0900 | [diff] [blame] | 64 | OpenstackNetworkingConfig config) { |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 65 | this.packetService = packetService; |
| 66 | this.openstackService = checkNotNull(openstackService); |
| 67 | this.config = checkNotNull(config); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Requests ARP packet to GatewayNode. |
| 72 | * |
| 73 | * @param appId application id |
| 74 | */ |
| 75 | public void requestPacket(ApplicationId appId) { |
| 76 | |
| 77 | TrafficSelector arpSelector = DefaultTrafficSelector.builder() |
| 78 | .matchEthType(EthType.EtherType.ARP.ethType().toShort()) |
| 79 | .build(); |
| 80 | |
| 81 | packetService.requestPackets(arpSelector, |
| 82 | PacketPriority.CONTROL, |
| 83 | appId, |
| 84 | Optional.of(DeviceId.deviceId(config.gatewayBridgeId()))); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Handles ARP packet. |
| 89 | * |
| 90 | * @param context packet context |
| 91 | * @param ethernet ethernet |
| 92 | */ |
| 93 | public void processArpPacketFromRouter(PacketContext context, Ethernet ethernet) { |
| 94 | checkNotNull(context, "context can not be null"); |
| 95 | checkNotNull(ethernet, "ethernet can not be null"); |
| 96 | |
Daniel Park | f78306f | 2016-04-06 17:57:48 +0900 | [diff] [blame] | 97 | |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 98 | ARP arp = (ARP) ethernet.getPayload(); |
| 99 | |
Daniel Park | f78306f | 2016-04-06 17:57:48 +0900 | [diff] [blame] | 100 | log.debug("arpEvent called from {} to {}", |
| 101 | Ip4Address.valueOf(arp.getSenderProtocolAddress()).toString(), |
| 102 | Ip4Address.valueOf(arp.getTargetProtocolAddress()).toString()); |
| 103 | |
Daniel Park | 81a61a1 | 2016-02-26 08:24:44 +0900 | [diff] [blame] | 104 | if (arp.getOpCode() != ARP.OP_REQUEST) { |
| 105 | return; |
| 106 | } |
| 107 | |
| 108 | IpAddress targetIp = Ip4Address.valueOf(arp.getTargetProtocolAddress()); |
| 109 | MacAddress targetMac = getTargetMacForTargetIp(targetIp.getIp4Address()); |
| 110 | |
| 111 | if (targetMac == MacAddress.NONE) { |
| 112 | return; |
| 113 | } |
| 114 | |
| 115 | Ethernet ethReply = ARP.buildArpReply(targetIp.getIp4Address(), |
| 116 | targetMac, ethernet); |
| 117 | |
| 118 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 119 | .setOutput(context.inPacket().receivedFrom().port()) |
| 120 | .build(); |
| 121 | |
| 122 | packetService.emit(new DefaultOutboundPacket( |
| 123 | context.inPacket().receivedFrom().deviceId(), |
| 124 | treatment, |
| 125 | ByteBuffer.wrap(ethReply.serialize()))); |
| 126 | } |
| 127 | |
| 128 | private MacAddress getTargetMacForTargetIp(Ip4Address targetIp) { |
| 129 | OpenstackPort port = openstackService.ports().stream() |
| 130 | .filter(p -> p.deviceOwner().equals(NETWORK_ROUTER_GATEWAY)) |
| 131 | .filter(p -> p.fixedIps().containsValue(targetIp.getIp4Address())) |
| 132 | .findAny().orElse(null); |
| 133 | |
| 134 | if (port == null) { |
| 135 | return MacAddress.NONE; |
| 136 | } |
| 137 | return port.macAddress(); |
| 138 | } |
| 139 | } |