tom | be98831 | 2014-09-19 18:38:47 -0700 | [diff] [blame] | 1 | package org.onlab.onos.net.host.impl; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 2 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 3 | import java.nio.ByteBuffer; |
| 4 | import java.util.ArrayList; |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 5 | import java.util.Collections; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 6 | import java.util.List; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 7 | import java.util.Set; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 8 | import java.util.concurrent.ConcurrentHashMap; |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 9 | import java.util.concurrent.ConcurrentMap; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 10 | import java.util.concurrent.TimeUnit; |
| 11 | |
| 12 | import org.jboss.netty.util.Timeout; |
| 13 | import org.jboss.netty.util.TimerTask; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 14 | import org.onlab.onos.net.ConnectPoint; |
| 15 | import org.onlab.onos.net.Device; |
| 16 | import org.onlab.onos.net.DeviceId; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 17 | import org.onlab.onos.net.Host; |
| 18 | import org.onlab.onos.net.Port; |
| 19 | import org.onlab.onos.net.device.DeviceService; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 20 | import org.onlab.onos.net.flow.DefaultTrafficTreatment; |
| 21 | import org.onlab.onos.net.flow.TrafficTreatment; |
| 22 | import org.onlab.onos.net.flow.instructions.Instruction; |
| 23 | import org.onlab.onos.net.flow.instructions.Instructions; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 24 | import org.onlab.onos.net.host.HostProvider; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 25 | import org.onlab.onos.net.host.PortAddresses; |
| 26 | import org.onlab.onos.net.packet.DefaultOutboundPacket; |
| 27 | import org.onlab.onos.net.packet.OutboundPacket; |
| 28 | import org.onlab.onos.net.packet.PacketService; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 29 | import org.onlab.onos.net.provider.ProviderId; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 30 | import org.onlab.packet.ARP; |
| 31 | import org.onlab.packet.Ethernet; |
| 32 | import org.onlab.packet.IpAddress; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 33 | import org.onlab.packet.IpPrefix; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 34 | import org.onlab.packet.MacAddress; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 35 | import org.onlab.util.Timer; |
| 36 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 37 | /** |
| 38 | * Monitors hosts on the dataplane to detect changes in host data. |
| 39 | * <p/> |
| 40 | * The HostMonitor can monitor hosts that have already been detected for |
| 41 | * changes. At an application's request, it can also monitor and actively |
| 42 | * probe for hosts that have not yet been detected (specified by IP address). |
| 43 | */ |
tom | 202175a | 2014-09-19 19:00:11 -0700 | [diff] [blame] | 44 | public class HostMonitor implements TimerTask { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 45 | private DeviceService deviceService; |
| 46 | private PacketService packetService; |
| 47 | private HostManager hostManager; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 48 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 49 | private final Set<IpAddress> monitoredAddresses; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 50 | |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 51 | private final ConcurrentMap<ProviderId, HostProvider> hostProviders; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 52 | |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 53 | private static final long DEFAULT_PROBE_RATE = 30000; // milliseconds |
| 54 | private long probeRate = DEFAULT_PROBE_RATE; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 55 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 56 | private Timeout timeout; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 57 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 58 | /** |
| 59 | * Creates a new host monitor. |
| 60 | * |
| 61 | * @param deviceService device service used to find edge ports |
| 62 | * @param packetService packet service used to send packets on the data plane |
Jonathan Hart | b4758a9 | 2014-09-24 10:46:45 -0700 | [diff] [blame] | 63 | * @param hostManager host manager used to look up host information and |
| 64 | * probe existing hosts |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 65 | */ |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 66 | public HostMonitor(DeviceService deviceService, PacketService packetService, |
Jonathan Hart | b4758a9 | 2014-09-24 10:46:45 -0700 | [diff] [blame] | 67 | HostManager hostManager) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 68 | |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 69 | this.deviceService = deviceService; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 70 | this.packetService = packetService; |
Jonathan Hart | b4758a9 | 2014-09-24 10:46:45 -0700 | [diff] [blame] | 71 | this.hostManager = hostManager; |
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 | monitoredAddresses = Collections.newSetFromMap( |
| 74 | new ConcurrentHashMap<IpAddress, Boolean>()); |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 75 | hostProviders = new ConcurrentHashMap<>(); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 76 | |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 77 | timeout = Timer.getTimer().newTimeout(this, 0, TimeUnit.MILLISECONDS); |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 78 | } |
| 79 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 80 | /** |
| 81 | * Adds an IP address to be monitored by the host monitor. The monitor will |
| 82 | * periodically probe the host to detect changes. |
| 83 | * |
| 84 | * @param ip IP address of the host to monitor |
| 85 | */ |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 86 | void addMonitoringFor(IpAddress ip) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 87 | monitoredAddresses.add(ip); |
| 88 | } |
| 89 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 90 | /** |
| 91 | * Stops monitoring the given IP address. |
| 92 | * |
| 93 | * @param ip IP address to stop monitoring on |
| 94 | */ |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 95 | void stopMonitoring(IpAddress ip) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 96 | monitoredAddresses.remove(ip); |
| 97 | } |
| 98 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 99 | /** |
| 100 | * Starts the host monitor. Does nothing if the monitor is already running. |
| 101 | */ |
| 102 | void start() { |
| 103 | synchronized (this) { |
| 104 | if (timeout == null) { |
| 105 | timeout = Timer.getTimer().newTimeout(this, 0, TimeUnit.MILLISECONDS); |
| 106 | } |
| 107 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 108 | } |
| 109 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 110 | /** |
| 111 | * Stops the host monitor. |
| 112 | */ |
| 113 | void shutdown() { |
| 114 | synchronized (this) { |
| 115 | timeout.cancel(); |
| 116 | timeout = null; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Registers a host provider with the host monitor. The monitor can use the |
| 122 | * provider to probe hosts. |
| 123 | * |
| 124 | * @param provider the host provider to register |
| 125 | */ |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 126 | void registerHostProvider(HostProvider provider) { |
| 127 | hostProviders.put(provider.id(), provider); |
| 128 | } |
| 129 | |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 130 | @Override |
| 131 | public void run(Timeout timeout) throws Exception { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 132 | for (IpAddress ip : monitoredAddresses) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 133 | // TODO have to convert right now because the HostService API uses IpPrefix |
| 134 | IpPrefix prefix = IpPrefix.valueOf(ip.toOctets()); |
| 135 | |
| 136 | Set<Host> hosts = hostManager.getHostsByIp(prefix); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 137 | |
| 138 | if (hosts.isEmpty()) { |
| 139 | sendArpRequest(ip); |
| 140 | } else { |
| 141 | for (Host host : hosts) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 142 | HostProvider provider = hostProviders.get(host.providerId()); |
Jonathan Hart | 34ed2fd | 2014-10-02 19:08:55 -0700 | [diff] [blame] | 143 | if (provider == null) { |
| 144 | hostProviders.remove(host.providerId(), null); |
| 145 | } else { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 146 | provider.triggerProbe(host); |
| 147 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 148 | } |
| 149 | } |
| 150 | } |
| 151 | |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 152 | this.timeout = Timer.getTimer().newTimeout(this, probeRate, TimeUnit.MILLISECONDS); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | /** |
| 156 | * Sends an ARP request for the given IP address. |
| 157 | * |
| 158 | * @param targetIp IP address to ARP for |
| 159 | */ |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 160 | private void sendArpRequest(IpAddress targetIp) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 161 | // Find ports with an IP address in the target's subnet and sent ARP |
| 162 | // probes out those ports. |
| 163 | for (Device device : deviceService.getDevices()) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 164 | for (Port port : deviceService.getPorts(device.id())) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 165 | ConnectPoint cp = new ConnectPoint(device.id(), port.number()); |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 166 | PortAddresses addresses = hostManager.getAddressBindingsForPort(cp); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 167 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 168 | for (IpPrefix prefix : addresses.ips()) { |
Jonathan Hart | 09585c6 | 2014-09-23 16:58:04 -0700 | [diff] [blame] | 169 | if (prefix.contains(targetIp)) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 170 | sendProbe(device.id(), port, targetIp, |
| 171 | prefix.toIpAddress(), addresses.mac()); |
Jonathan Hart | 09585c6 | 2014-09-23 16:58:04 -0700 | [diff] [blame] | 172 | } |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 173 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 174 | } |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 175 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 176 | } |
| 177 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 178 | private void sendProbe(DeviceId deviceId, Port port, IpAddress targetIp, |
| 179 | IpAddress sourceIp, MacAddress sourceMac) { |
| 180 | Ethernet arpPacket = buildArpRequest(targetIp, sourceIp, sourceMac); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 181 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 182 | List<Instruction> instructions = new ArrayList<>(); |
| 183 | instructions.add(Instructions.createOutput(port.number())); |
| 184 | |
tom | 9a693fd | 2014-10-03 11:32:19 -0700 | [diff] [blame] | 185 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame] | 186 | .setOutput(port.number()) |
| 187 | .build(); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 188 | |
| 189 | OutboundPacket outboundPacket = |
| 190 | new DefaultOutboundPacket(deviceId, treatment, |
| 191 | ByteBuffer.wrap(arpPacket.serialize())); |
| 192 | |
| 193 | packetService.emit(outboundPacket); |
| 194 | } |
| 195 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 196 | private Ethernet buildArpRequest(IpAddress targetIp, IpAddress sourceIp, |
| 197 | MacAddress sourceMac) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 198 | |
| 199 | ARP arp = new ARP(); |
| 200 | arp.setHardwareType(ARP.HW_TYPE_ETHERNET) |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 201 | .setHardwareAddressLength((byte) Ethernet.DATALAYER_ADDRESS_LENGTH) |
| 202 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 203 | .setProtocolAddressLength((byte) IpPrefix.INET_LEN) |
| 204 | .setOpCode(ARP.OP_REQUEST); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 205 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 206 | arp.setSenderHardwareAddress(sourceMac.getAddress()) |
| 207 | .setSenderProtocolAddress(sourceIp.toOctets()) |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 208 | .setTargetHardwareAddress(MacAddress.ZERO_MAC_ADDRESS) |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 209 | .setTargetProtocolAddress(targetIp.toOctets()); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 210 | |
| 211 | Ethernet ethernet = new Ethernet(); |
| 212 | ethernet.setEtherType(Ethernet.TYPE_ARP) |
Jonathan Hart | 8f6f1ea | 2014-10-03 16:05:19 -0700 | [diff] [blame] | 213 | .setDestinationMACAddress(MacAddress.BROADCAST_MAC) |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame] | 214 | .setSourceMACAddress(sourceMac.getAddress()) |
| 215 | .setPayload(arp); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 216 | |
| 217 | return ethernet; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 218 | } |
| 219 | } |