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 | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 5 | import java.util.HashSet; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 6 | import java.util.List; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 7 | import java.util.Map; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 8 | import java.util.Set; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 9 | import java.util.concurrent.ConcurrentHashMap; |
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; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 36 | import org.slf4j.Logger; |
| 37 | import org.slf4j.LoggerFactory; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 38 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 39 | /** |
| 40 | * Monitors hosts on the dataplane to detect changes in host data. |
| 41 | * <p/> |
| 42 | * The HostMonitor can monitor hosts that have already been detected for |
| 43 | * changes. At an application's request, it can also monitor and actively |
| 44 | * probe for hosts that have not yet been detected (specified by IP address). |
| 45 | */ |
tom | 202175a | 2014-09-19 19:00:11 -0700 | [diff] [blame] | 46 | public class HostMonitor implements TimerTask { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 47 | private static final Logger log = LoggerFactory.getLogger(HostMonitor.class); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 48 | |
| 49 | private static final byte[] ZERO_MAC_ADDRESS = |
| 50 | MacAddress.valueOf("00:00:00:00:00:00").getAddress(); |
| 51 | |
| 52 | // TODO put on Ethernet |
| 53 | private static final byte[] BROADCAST_MAC = |
| 54 | MacAddress.valueOf("ff:ff:ff:ff:ff:ff").getAddress(); |
| 55 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 56 | private DeviceService deviceService; |
| 57 | private PacketService packetService; |
| 58 | private HostManager hostManager; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 59 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 60 | private final Set<IpAddress> monitoredAddresses; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 61 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 62 | private final Map<ProviderId, HostProvider> hostProviders; |
| 63 | |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 64 | private final long probeRate; |
| 65 | |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame] | 66 | private final Timeout timeout; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 67 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 68 | public HostMonitor( |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame] | 69 | DeviceService deviceService, |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 70 | PacketService packetService, |
| 71 | HostManager hostService) { |
| 72 | |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 73 | this.deviceService = deviceService; |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 74 | this.packetService = packetService; |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 75 | this.hostManager = hostService; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 76 | |
| 77 | monitoredAddresses = new HashSet<>(); |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 78 | hostProviders = new ConcurrentHashMap<>(); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 79 | |
| 80 | probeRate = 30000; // milliseconds |
| 81 | |
| 82 | timeout = Timer.getTimer().newTimeout(this, 0, TimeUnit.MILLISECONDS); |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 83 | |
| 84 | addDefaultAddresses(); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 85 | } |
| 86 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 87 | private void addDefaultAddresses() { |
| 88 | //monitoredAddresses.add(IpAddress.valueOf("10.0.0.1")); |
| 89 | } |
| 90 | |
| 91 | void addMonitoringFor(IpAddress ip) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 92 | monitoredAddresses.add(ip); |
| 93 | } |
| 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 | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 99 | void shutdown() { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 100 | timeout.cancel(); |
| 101 | } |
| 102 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 103 | void registerHostProvider(HostProvider provider) { |
| 104 | hostProviders.put(provider.id(), provider); |
| 105 | } |
| 106 | |
| 107 | void unregisterHostProvider(HostProvider provider) { |
| 108 | // TODO find out how to call this |
| 109 | } |
| 110 | |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 111 | @Override |
| 112 | public void run(Timeout timeout) throws Exception { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 113 | for (IpAddress ip : monitoredAddresses) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 114 | // TODO have to convert right now because the HostService API uses IpPrefix |
| 115 | IpPrefix prefix = IpPrefix.valueOf(ip.toOctets()); |
| 116 | |
| 117 | Set<Host> hosts = hostManager.getHostsByIp(prefix); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 118 | |
| 119 | if (hosts.isEmpty()) { |
| 120 | sendArpRequest(ip); |
| 121 | } else { |
| 122 | for (Host host : hosts) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 123 | HostProvider provider = hostProviders.get(host.providerId()); |
| 124 | if (provider != null) { |
| 125 | provider.triggerProbe(host); |
| 126 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 127 | } |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | timeout = Timer.getTimer().newTimeout(this, probeRate, TimeUnit.MILLISECONDS); |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Sends an ARP request for the given IP address. |
| 136 | * |
| 137 | * @param targetIp IP address to ARP for |
| 138 | */ |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 139 | private void sendArpRequest(IpAddress targetIp) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 140 | // Find ports with an IP address in the target's subnet and sent ARP |
| 141 | // probes out those ports. |
| 142 | for (Device device : deviceService.getDevices()) { |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 143 | for (Port port : deviceService.getPorts(device.id())) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 144 | ConnectPoint cp = new ConnectPoint(device.id(), port.number()); |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 145 | PortAddresses addresses = hostManager.getAddressBindingsForPort(cp); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 146 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 147 | for (IpPrefix prefix : addresses.ips()) { |
Jonathan Hart | 09585c6 | 2014-09-23 16:58:04 -0700 | [diff] [blame] | 148 | if (prefix.contains(targetIp)) { |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 149 | sendProbe(device.id(), port, targetIp, |
| 150 | prefix.toIpAddress(), addresses.mac()); |
Jonathan Hart | 09585c6 | 2014-09-23 16:58:04 -0700 | [diff] [blame] | 151 | } |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 152 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 153 | } |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 154 | } |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 155 | } |
| 156 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 157 | private void sendProbe(DeviceId deviceId, Port port, IpAddress targetIp, |
| 158 | IpAddress sourceIp, MacAddress sourceMac) { |
| 159 | Ethernet arpPacket = buildArpRequest(targetIp, sourceIp, sourceMac); |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 160 | |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 161 | List<Instruction> instructions = new ArrayList<>(); |
| 162 | instructions.add(Instructions.createOutput(port.number())); |
| 163 | |
alshabib | 010c31d | 2014-09-26 10:01:12 -0700 | [diff] [blame] | 164 | TrafficTreatment treatment = new DefaultTrafficTreatment.Builder() |
| 165 | .setOutput(port.number()) |
| 166 | .build(); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 167 | |
| 168 | OutboundPacket outboundPacket = |
| 169 | new DefaultOutboundPacket(deviceId, treatment, |
| 170 | ByteBuffer.wrap(arpPacket.serialize())); |
| 171 | |
| 172 | packetService.emit(outboundPacket); |
| 173 | } |
| 174 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 175 | private Ethernet buildArpRequest(IpAddress targetIp, IpAddress sourceIp, |
| 176 | MacAddress sourceMac) { |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 177 | |
| 178 | ARP arp = new ARP(); |
| 179 | arp.setHardwareType(ARP.HW_TYPE_ETHERNET) |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 180 | .setHardwareAddressLength((byte) Ethernet.DATALAYER_ADDRESS_LENGTH) |
| 181 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 182 | .setProtocolAddressLength((byte) IpPrefix.INET_LEN) |
| 183 | .setOpCode(ARP.OP_REQUEST); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 184 | |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 185 | arp.setSenderHardwareAddress(sourceMac.getAddress()) |
| 186 | .setSenderProtocolAddress(sourceIp.toOctets()) |
| 187 | .setTargetHardwareAddress(ZERO_MAC_ADDRESS) |
| 188 | .setTargetProtocolAddress(targetIp.toOctets()); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 189 | |
| 190 | Ethernet ethernet = new Ethernet(); |
| 191 | ethernet.setEtherType(Ethernet.TYPE_ARP) |
Jonathan Hart | 70da512 | 2014-10-01 16:37:42 -0700 | [diff] [blame^] | 192 | .setDestinationMACAddress(BROADCAST_MAC) |
| 193 | .setSourceMACAddress(sourceMac.getAddress()) |
| 194 | .setPayload(arp); |
Jonathan Hart | 87fbbad | 2014-09-23 08:43:50 -0700 | [diff] [blame] | 195 | |
| 196 | return ethernet; |
Jonathan Hart | fca736c | 2014-09-19 17:26:59 -0700 | [diff] [blame] | 197 | } |
| 198 | } |