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; |
| 5 | import java.util.Collections; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 6 | import java.util.HashSet; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 7 | import java.util.List; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 8 | import java.util.Set; |
| 9 | import java.util.concurrent.TimeUnit; |
| 10 | |
| 11 | import org.jboss.netty.util.Timeout; |
| 12 | import org.jboss.netty.util.TimerTask; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 13 | import org.onlab.onos.net.ConnectPoint; |
| 14 | import org.onlab.onos.net.Device; |
| 15 | import org.onlab.onos.net.DeviceId; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 16 | import org.onlab.onos.net.Host; |
| 17 | import org.onlab.onos.net.Port; |
| 18 | import org.onlab.onos.net.device.DeviceService; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 19 | import org.onlab.onos.net.flow.DefaultTrafficTreatment; |
| 20 | import org.onlab.onos.net.flow.TrafficTreatment; |
| 21 | import org.onlab.onos.net.flow.instructions.Instruction; |
| 22 | import org.onlab.onos.net.flow.instructions.Instructions; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 23 | import org.onlab.onos.net.host.HostProvider; |
| 24 | import org.onlab.onos.net.host.HostService; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 25 | import org.onlab.onos.net.host.HostStore; |
| 26 | import org.onlab.onos.net.host.PortAddresses; |
| 27 | import org.onlab.onos.net.packet.DefaultOutboundPacket; |
| 28 | import org.onlab.onos.net.packet.OutboundPacket; |
| 29 | import org.onlab.onos.net.packet.PacketService; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 30 | import org.onlab.onos.net.topology.TopologyService; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 31 | import org.onlab.packet.ARP; |
| 32 | import org.onlab.packet.Ethernet; |
| 33 | import org.onlab.packet.IpAddress; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 34 | import org.onlab.packet.IpPrefix; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 35 | import org.onlab.packet.MacAddress; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 36 | import org.onlab.util.Timer; |
| 37 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 38 | /** |
| 39 | * Monitors hosts on the dataplane to detect changes in host data. |
| 40 | * <p/> |
| 41 | * The HostMonitor can monitor hosts that have already been detected for |
| 42 | * changes. At an application's request, it can also monitor and actively |
| 43 | * probe for hosts that have not yet been detected (specified by IP address). |
| 44 | */ |
tom | 202175a | 2014-09-19 19:00:11 -0700 | [diff] [blame] | 45 | public class HostMonitor implements TimerTask { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 46 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 47 | private static final byte[] DEFAULT_MAC_ADDRESS = |
| 48 | MacAddress.valueOf("00:00:00:00:00:01").getAddress(); |
| 49 | |
| 50 | private static final byte[] ZERO_MAC_ADDRESS = |
| 51 | MacAddress.valueOf("00:00:00:00:00:00").getAddress(); |
| 52 | |
| 53 | // TODO put on Ethernet |
| 54 | private static final byte[] BROADCAST_MAC = |
| 55 | MacAddress.valueOf("ff:ff:ff:ff:ff:ff").getAddress(); |
| 56 | |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 57 | private final HostService hostService; |
| 58 | private final TopologyService topologyService; |
| 59 | private final DeviceService deviceService; |
| 60 | private final HostProvider hostProvider; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 61 | private final PacketService packetService; |
| 62 | private final HostStore hostStore; |
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 | |
| 66 | private final long probeRate; |
| 67 | |
| 68 | private Timeout timeout; |
| 69 | |
tom | 202175a | 2014-09-19 19:00:11 -0700 | [diff] [blame] | 70 | public HostMonitor(HostService hostService, TopologyService topologyService, |
| 71 | DeviceService deviceService, |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 72 | HostProvider hostProvider, PacketService packetService, |
| 73 | HostStore hostStore) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 74 | this.hostService = hostService; |
| 75 | this.topologyService = topologyService; |
| 76 | this.deviceService = deviceService; |
| 77 | this.hostProvider = hostProvider; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 78 | this.packetService = packetService; |
| 79 | this.hostStore = hostStore; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 80 | |
| 81 | monitoredAddresses = new HashSet<>(); |
| 82 | |
| 83 | probeRate = 30000; // milliseconds |
| 84 | |
| 85 | timeout = Timer.getTimer().newTimeout(this, 0, TimeUnit.MILLISECONDS); |
| 86 | } |
| 87 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 88 | public void addMonitoringFor(IpAddress ip) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 89 | monitoredAddresses.add(ip); |
| 90 | } |
| 91 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 92 | public void stopMonitoring(IpAddress ip) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 93 | monitoredAddresses.remove(ip); |
| 94 | } |
| 95 | |
| 96 | public void shutdown() { |
| 97 | timeout.cancel(); |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public void run(Timeout timeout) throws Exception { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 102 | for (IpAddress ip : monitoredAddresses) { |
| 103 | Set<Host> hosts = Collections.emptySet(); //TODO hostService.getHostsByIp(ip); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 104 | |
| 105 | if (hosts.isEmpty()) { |
| 106 | sendArpRequest(ip); |
| 107 | } else { |
| 108 | for (Host host : hosts) { |
| 109 | hostProvider.triggerProbe(host); |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | timeout = Timer.getTimer().newTimeout(this, probeRate, TimeUnit.MILLISECONDS); |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Sends an ARP request for the given IP address. |
| 119 | * |
| 120 | * @param targetIp IP address to ARP for |
| 121 | */ |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 122 | private void sendArpRequest(IpAddress targetIp) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 123 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 124 | // Find ports with an IP address in the target's subnet and sent ARP |
| 125 | // probes out those ports. |
| 126 | for (Device device : deviceService.getDevices()) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 127 | for (Port port : deviceService.getPorts(device.id())) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 128 | ConnectPoint cp = new ConnectPoint(device.id(), port.number()); |
| 129 | PortAddresses addresses = hostStore.getAddressBindingsForPort(cp); |
| 130 | |
| 131 | if (addresses.ip().contains(targetIp)) { |
| 132 | sendProbe(device.id(), port, addresses, targetIp); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 133 | } |
| 134 | } |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 135 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 136 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 137 | // TODO case where no address was found. |
| 138 | // Broadcast out internal edge ports? |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 139 | } |
| 140 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 141 | private void sendProbe(DeviceId deviceId, Port port, PortAddresses portAddresses, |
| 142 | IpAddress targetIp) { |
| 143 | Ethernet arpPacket = createArpFor(targetIp, portAddresses); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 144 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame^] | 145 | List<Instruction> instructions = new ArrayList<>(); |
| 146 | instructions.add(Instructions.createOutput(port.number())); |
| 147 | |
| 148 | TrafficTreatment treatment = |
| 149 | new DefaultTrafficTreatment.Builder() |
| 150 | .add(Instructions.createOutput(port.number())) |
| 151 | .build(); |
| 152 | |
| 153 | OutboundPacket outboundPacket = |
| 154 | new DefaultOutboundPacket(deviceId, treatment, |
| 155 | ByteBuffer.wrap(arpPacket.serialize())); |
| 156 | |
| 157 | packetService.emit(outboundPacket); |
| 158 | } |
| 159 | |
| 160 | private Ethernet createArpFor(IpAddress targetIp, PortAddresses portAddresses) { |
| 161 | |
| 162 | ARP arp = new ARP(); |
| 163 | arp.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| 164 | .setHardwareAddressLength((byte) Ethernet.DATALAYER_ADDRESS_LENGTH) |
| 165 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 166 | .setProtocolAddressLength((byte) IpPrefix.INET_LEN); |
| 167 | |
| 168 | byte[] sourceMacAddress; |
| 169 | if (portAddresses.mac() == null) { |
| 170 | sourceMacAddress = DEFAULT_MAC_ADDRESS; |
| 171 | } else { |
| 172 | sourceMacAddress = portAddresses.mac().getAddress(); |
| 173 | } |
| 174 | |
| 175 | arp.setSenderHardwareAddress(sourceMacAddress) |
| 176 | .setSenderProtocolAddress(portAddresses.ip().toOctets()) |
| 177 | .setTargetHardwareAddress(ZERO_MAC_ADDRESS) |
| 178 | .setTargetProtocolAddress(targetIp.toOctets()); |
| 179 | |
| 180 | Ethernet ethernet = new Ethernet(); |
| 181 | ethernet.setEtherType(Ethernet.TYPE_ARP) |
| 182 | .setDestinationMACAddress(BROADCAST_MAC) |
| 183 | .setSourceMACAddress(sourceMacAddress) |
| 184 | .setPayload(arp); |
| 185 | |
| 186 | return ethernet; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 187 | } |
| 188 | } |