Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 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 | * |
| 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 | */ |
tom | be98831 | 2014-09-19 18:38:47 -0700 | [diff] [blame] | 16 | package org.onlab.onos.net.host.impl; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 17 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 18 | import java.nio.ByteBuffer; |
| 19 | import java.util.ArrayList; |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 20 | import java.util.Collections; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 21 | import java.util.List; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 22 | import java.util.Set; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 23 | import java.util.concurrent.ConcurrentHashMap; |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 24 | import java.util.concurrent.ConcurrentMap; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 25 | import java.util.concurrent.TimeUnit; |
| 26 | |
| 27 | import org.jboss.netty.util.Timeout; |
| 28 | import org.jboss.netty.util.TimerTask; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 29 | import org.onlab.onos.net.ConnectPoint; |
| 30 | import org.onlab.onos.net.Device; |
| 31 | import org.onlab.onos.net.DeviceId; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 32 | import org.onlab.onos.net.Host; |
| 33 | import org.onlab.onos.net.Port; |
| 34 | import org.onlab.onos.net.device.DeviceService; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 35 | import org.onlab.onos.net.flow.DefaultTrafficTreatment; |
| 36 | import org.onlab.onos.net.flow.TrafficTreatment; |
| 37 | import org.onlab.onos.net.flow.instructions.Instruction; |
| 38 | import org.onlab.onos.net.flow.instructions.Instructions; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 39 | import org.onlab.onos.net.host.HostProvider; |
Pavlin Radoslavov | 76b0ae2 | 2014-10-27 15:33:19 -0700 | [diff] [blame] | 40 | import org.onlab.onos.net.host.InterfaceIpAddress; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 41 | import org.onlab.onos.net.host.PortAddresses; |
| 42 | import org.onlab.onos.net.packet.DefaultOutboundPacket; |
| 43 | import org.onlab.onos.net.packet.OutboundPacket; |
| 44 | import org.onlab.onos.net.packet.PacketService; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 45 | import org.onlab.onos.net.provider.ProviderId; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 46 | import org.onlab.packet.ARP; |
| 47 | import org.onlab.packet.Ethernet; |
| 48 | import org.onlab.packet.IpAddress; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 49 | import org.onlab.packet.MacAddress; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 50 | import org.onlab.util.Timer; |
| 51 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 52 | /** |
| 53 | * Monitors hosts on the dataplane to detect changes in host data. |
| 54 | * <p/> |
| 55 | * The HostMonitor can monitor hosts that have already been detected for |
| 56 | * changes. At an application's request, it can also monitor and actively |
| 57 | * probe for hosts that have not yet been detected (specified by IP address). |
| 58 | */ |
tom | 202175a | 2014-09-19 19:00:11 -0700 | [diff] [blame] | 59 | public class HostMonitor implements TimerTask { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 60 | private DeviceService deviceService; |
| 61 | private PacketService packetService; |
| 62 | private HostManager hostManager; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 63 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 64 | private final Set<IpAddress> monitoredAddresses; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 65 | |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 66 | private final ConcurrentMap<ProviderId, HostProvider> hostProviders; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 67 | |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 68 | private static final long DEFAULT_PROBE_RATE = 30000; // milliseconds |
| 69 | private long probeRate = DEFAULT_PROBE_RATE; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 70 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 71 | private Timeout timeout; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 72 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 73 | /** |
| 74 | * Creates a new host monitor. |
| 75 | * |
| 76 | * @param deviceService device service used to find edge ports |
| 77 | * @param packetService packet service used to send packets on the data plane |
Jonathan Hart | b4758a9 | 2014-09-24 10:46:45 -0700 | [diff] [blame] | 78 | * @param hostManager host manager used to look up host information and |
| 79 | * probe existing hosts |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 80 | */ |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 81 | public HostMonitor(DeviceService deviceService, PacketService packetService, |
Jonathan Hart | b4758a9 | 2014-09-24 10:46:45 -0700 | [diff] [blame] | 82 | HostManager hostManager) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 83 | |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 84 | this.deviceService = deviceService; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 85 | this.packetService = packetService; |
Jonathan Hart | b4758a9 | 2014-09-24 10:46:45 -0700 | [diff] [blame] | 86 | this.hostManager = hostManager; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 87 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 88 | monitoredAddresses = Collections.newSetFromMap( |
| 89 | new ConcurrentHashMap<IpAddress, Boolean>()); |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 90 | hostProviders = new ConcurrentHashMap<>(); |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 91 | } |
| 92 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 93 | /** |
| 94 | * Adds an IP address to be monitored by the host monitor. The monitor will |
| 95 | * periodically probe the host to detect changes. |
| 96 | * |
| 97 | * @param ip IP address of the host to monitor |
| 98 | */ |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 99 | void addMonitoringFor(IpAddress ip) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 100 | monitoredAddresses.add(ip); |
| 101 | } |
| 102 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 103 | /** |
| 104 | * Stops monitoring the given IP address. |
| 105 | * |
| 106 | * @param ip IP address to stop monitoring on |
| 107 | */ |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 108 | void stopMonitoring(IpAddress ip) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 109 | monitoredAddresses.remove(ip); |
| 110 | } |
| 111 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 112 | /** |
| 113 | * Starts the host monitor. Does nothing if the monitor is already running. |
| 114 | */ |
| 115 | void start() { |
| 116 | synchronized (this) { |
| 117 | if (timeout == null) { |
| 118 | timeout = Timer.getTimer().newTimeout(this, 0, TimeUnit.MILLISECONDS); |
| 119 | } |
| 120 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 121 | } |
| 122 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 123 | /** |
| 124 | * Stops the host monitor. |
| 125 | */ |
| 126 | void shutdown() { |
| 127 | synchronized (this) { |
| 128 | timeout.cancel(); |
| 129 | timeout = null; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Registers a host provider with the host monitor. The monitor can use the |
| 135 | * provider to probe hosts. |
| 136 | * |
| 137 | * @param provider the host provider to register |
| 138 | */ |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 139 | void registerHostProvider(HostProvider provider) { |
| 140 | hostProviders.put(provider.id(), provider); |
| 141 | } |
| 142 | |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 143 | @Override |
| 144 | public void run(Timeout timeout) throws Exception { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 145 | for (IpAddress ip : monitoredAddresses) { |
Pavlin Radoslavov | 33f228a | 2014-10-27 19:33:16 -0700 | [diff] [blame] | 146 | Set<Host> hosts = hostManager.getHostsByIp(ip); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 147 | |
| 148 | if (hosts.isEmpty()) { |
| 149 | sendArpRequest(ip); |
| 150 | } else { |
| 151 | for (Host host : hosts) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 152 | HostProvider provider = hostProviders.get(host.providerId()); |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 153 | if (provider == null) { |
| 154 | hostProviders.remove(host.providerId(), null); |
| 155 | } else { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 156 | provider.triggerProbe(host); |
| 157 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 158 | } |
| 159 | } |
| 160 | } |
| 161 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 162 | this.timeout = Timer.getTimer().newTimeout(this, probeRate, TimeUnit.MILLISECONDS); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Sends an ARP request for the given IP address. |
| 167 | * |
| 168 | * @param targetIp IP address to ARP for |
| 169 | */ |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 170 | private void sendArpRequest(IpAddress targetIp) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 171 | // Find ports with an IP address in the target's subnet and sent ARP |
| 172 | // probes out those ports. |
| 173 | for (Device device : deviceService.getDevices()) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 174 | for (Port port : deviceService.getPorts(device.id())) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 175 | ConnectPoint cp = new ConnectPoint(device.id(), port.number()); |
Pavlin Radoslavov | 76b0ae2 | 2014-10-27 15:33:19 -0700 | [diff] [blame] | 176 | PortAddresses portAddresses = |
| 177 | hostManager.getAddressBindingsForPort(cp); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 178 | |
Pavlin Radoslavov | 76b0ae2 | 2014-10-27 15:33:19 -0700 | [diff] [blame] | 179 | for (InterfaceIpAddress ia : portAddresses.ipAddresses()) { |
| 180 | if (ia.subnetAddress().contains(targetIp)) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 181 | sendProbe(device.id(), port, targetIp, |
Pavlin Radoslavov | 76b0ae2 | 2014-10-27 15:33:19 -0700 | [diff] [blame] | 182 | ia.ipAddress(), portAddresses.mac()); |
Jonathan Hart | 09585c6 | 2014-09-23 16:58:04 -0700 | [diff] [blame] | 183 | } |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 184 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 185 | } |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 186 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 189 | private void sendProbe(DeviceId deviceId, Port port, IpAddress targetIp, |
| 190 | IpAddress sourceIp, MacAddress sourceMac) { |
| 191 | Ethernet arpPacket = buildArpRequest(targetIp, sourceIp, sourceMac); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 192 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 193 | List<Instruction> instructions = new ArrayList<>(); |
| 194 | instructions.add(Instructions.createOutput(port.number())); |
| 195 | |
tom | 9a693fd | 2014-10-03 11:32:19 -0700 | [diff] [blame] | 196 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame] | 197 | .setOutput(port.number()) |
| 198 | .build(); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 199 | |
| 200 | OutboundPacket outboundPacket = |
| 201 | new DefaultOutboundPacket(deviceId, treatment, |
| 202 | ByteBuffer.wrap(arpPacket.serialize())); |
| 203 | |
| 204 | packetService.emit(outboundPacket); |
| 205 | } |
| 206 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 207 | private Ethernet buildArpRequest(IpAddress targetIp, IpAddress sourceIp, |
| 208 | MacAddress sourceMac) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 209 | |
| 210 | ARP arp = new ARP(); |
| 211 | arp.setHardwareType(ARP.HW_TYPE_ETHERNET) |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 212 | .setHardwareAddressLength((byte) Ethernet.DATALAYER_ADDRESS_LENGTH) |
| 213 | .setProtocolType(ARP.PROTO_TYPE_IP) |
Pavlin Radoslavov | 52307e6 | 2014-10-29 15:07:37 -0700 | [diff] [blame] | 214 | .setProtocolAddressLength((byte) IpAddress.INET_BYTE_LENGTH) |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 215 | .setOpCode(ARP.OP_REQUEST); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 216 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 217 | arp.setSenderHardwareAddress(sourceMac.getAddress()) |
| 218 | .setSenderProtocolAddress(sourceIp.toOctets()) |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 219 | .setTargetHardwareAddress(MacAddress.ZERO_MAC_ADDRESS) |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 220 | .setTargetProtocolAddress(targetIp.toOctets()); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 221 | |
| 222 | Ethernet ethernet = new Ethernet(); |
| 223 | ethernet.setEtherType(Ethernet.TYPE_ARP) |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 224 | .setDestinationMACAddress(MacAddress.BROADCAST_MAC) |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 225 | .setSourceMACAddress(sourceMac.getAddress()) |
| 226 | .setPayload(arp); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 227 | |
| 228 | return ethernet; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 229 | } |
| 230 | } |