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 | |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame^] | 68 | private final Timeout timeout; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 69 | |
tom | 202175a | 2014-09-19 19:00:11 -0700 | [diff] [blame] | 70 | public HostMonitor(HostService hostService, TopologyService topologyService, |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame^] | 71 | DeviceService deviceService, |
| 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 | |
Jonathan Hart | 09585c6 | 2014-09-23 16:58:04 -0700 | [diff] [blame] | 131 | /*for (IpPrefix prefix : addresses.ips()) { |
| 132 | if (prefix.contains(targetIp)) { |
| 133 | sendProbe(device.id(), port, addresses, targetIp); |
| 134 | } |
| 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 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 138 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 139 | // TODO case where no address was found. |
| 140 | // Broadcast out internal edge ports? |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 141 | } |
| 142 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 143 | private void sendProbe(DeviceId deviceId, Port port, PortAddresses portAddresses, |
| 144 | IpAddress targetIp) { |
| 145 | Ethernet arpPacket = createArpFor(targetIp, portAddresses); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 146 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 147 | List<Instruction> instructions = new ArrayList<>(); |
| 148 | instructions.add(Instructions.createOutput(port.number())); |
| 149 | |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame^] | 150 | TrafficTreatment treatment = new DefaultTrafficTreatment.Builder() |
| 151 | .setOutput(port.number()) |
| 152 | .build(); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 153 | |
| 154 | OutboundPacket outboundPacket = |
| 155 | new DefaultOutboundPacket(deviceId, treatment, |
| 156 | ByteBuffer.wrap(arpPacket.serialize())); |
| 157 | |
| 158 | packetService.emit(outboundPacket); |
| 159 | } |
| 160 | |
| 161 | private Ethernet createArpFor(IpAddress targetIp, PortAddresses portAddresses) { |
| 162 | |
| 163 | ARP arp = new ARP(); |
| 164 | arp.setHardwareType(ARP.HW_TYPE_ETHERNET) |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame^] | 165 | .setHardwareAddressLength((byte) Ethernet.DATALAYER_ADDRESS_LENGTH) |
| 166 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 167 | .setProtocolAddressLength((byte) IpPrefix.INET_LEN); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 168 | |
| 169 | byte[] sourceMacAddress; |
| 170 | if (portAddresses.mac() == null) { |
| 171 | sourceMacAddress = DEFAULT_MAC_ADDRESS; |
| 172 | } else { |
| 173 | sourceMacAddress = portAddresses.mac().getAddress(); |
| 174 | } |
| 175 | |
| 176 | arp.setSenderHardwareAddress(sourceMacAddress) |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame^] | 177 | //TODO .setSenderProtocolAddress(portAddresses.ips().toOctets()) |
| 178 | .setTargetHardwareAddress(ZERO_MAC_ADDRESS) |
| 179 | .setTargetProtocolAddress(targetIp.toOctets()); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 180 | |
| 181 | Ethernet ethernet = new Ethernet(); |
| 182 | ethernet.setEtherType(Ethernet.TYPE_ARP) |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame^] | 183 | .setDestinationMACAddress(BROADCAST_MAC) |
| 184 | .setSourceMACAddress(sourceMacAddress) |
| 185 | .setPayload(arp); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 186 | |
| 187 | return ethernet; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 188 | } |
| 189 | } |