Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 1 | package net.onrc.onos.ofcontroller.proxyarp; |
| 2 | |
| 3 | import java.io.IOException; |
| 4 | import java.net.InetAddress; |
| 5 | import java.net.UnknownHostException; |
| 6 | import java.util.ArrayList; |
| 7 | import java.util.Collection; |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 8 | import java.util.HashSet; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 9 | import java.util.Iterator; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 10 | import java.util.List; |
| 11 | import java.util.Map; |
| 12 | import java.util.Set; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 13 | import java.util.Timer; |
| 14 | import java.util.TimerTask; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 15 | |
| 16 | import net.floodlightcontroller.core.FloodlightContext; |
| 17 | import net.floodlightcontroller.core.IFloodlightProviderService; |
| 18 | import net.floodlightcontroller.core.IOFMessageListener; |
| 19 | import net.floodlightcontroller.core.IOFSwitch; |
| 20 | import net.floodlightcontroller.packet.ARP; |
| 21 | import net.floodlightcontroller.packet.Ethernet; |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 22 | import net.floodlightcontroller.packet.IPv4; |
Jonathan Hart | 5afde49 | 2013-10-01 12:30:53 +1300 | [diff] [blame] | 23 | import net.floodlightcontroller.restserver.IRestApiService; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 24 | import net.floodlightcontroller.topology.ITopologyService; |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 25 | import net.floodlightcontroller.util.MACAddress; |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 26 | import net.onrc.onos.datagrid.IDatagridService; |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 27 | import net.onrc.onos.ofcontroller.bgproute.Interface; |
Jonathan Hart | d6ed62b | 2013-11-01 13:18:25 -0700 | [diff] [blame] | 28 | import net.onrc.onos.ofcontroller.core.IDeviceStorage; |
| 29 | import net.onrc.onos.ofcontroller.core.INetMapTopologyObjects.IDeviceObject; |
Jonathan Hart | 9a21e0d | 2013-11-14 15:09:09 -0800 | [diff] [blame] | 30 | import net.onrc.onos.ofcontroller.core.INetMapTopologyObjects.IPortObject; |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 31 | import net.onrc.onos.ofcontroller.core.INetMapTopologyService.ITopoLinkService; |
| 32 | import net.onrc.onos.ofcontroller.core.INetMapTopologyService.ITopoSwitchService; |
Jonathan Hart | ebba1e1 | 2013-10-29 11:37:02 -0700 | [diff] [blame] | 33 | import net.onrc.onos.ofcontroller.core.config.IConfigInfoService; |
Jonathan Hart | d6ed62b | 2013-11-01 13:18:25 -0700 | [diff] [blame] | 34 | import net.onrc.onos.ofcontroller.core.internal.DeviceStorageImpl; |
Jonathan Hart | 9a21e0d | 2013-11-14 15:09:09 -0800 | [diff] [blame] | 35 | import net.onrc.onos.ofcontroller.core.internal.TopoLinkServiceImpl; |
| 36 | import net.onrc.onos.ofcontroller.core.internal.TopoSwitchServiceImpl; |
Jonathan Hart | ba9ced9 | 2013-11-24 16:52:13 -0800 | [diff] [blame^] | 37 | import net.onrc.onos.ofcontroller.util.Dpid; |
| 38 | import net.onrc.onos.ofcontroller.util.Port; |
| 39 | import net.onrc.onos.ofcontroller.util.SwitchPort; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 40 | |
| 41 | import org.openflow.protocol.OFMessage; |
| 42 | import org.openflow.protocol.OFPacketIn; |
| 43 | import org.openflow.protocol.OFPacketOut; |
| 44 | import org.openflow.protocol.OFPort; |
| 45 | import org.openflow.protocol.OFType; |
| 46 | import org.openflow.protocol.action.OFAction; |
| 47 | import org.openflow.protocol.action.OFActionOutput; |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 48 | import org.openflow.util.HexString; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 49 | import org.slf4j.Logger; |
| 50 | import org.slf4j.LoggerFactory; |
| 51 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 52 | import com.google.common.collect.HashMultimap; |
| 53 | import com.google.common.collect.Multimaps; |
| 54 | import com.google.common.collect.SetMultimap; |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 55 | import com.google.common.net.InetAddresses; |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 56 | |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 57 | public class ProxyArpManager implements IProxyArpService, IOFMessageListener, |
| 58 | IArpEventHandler { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 59 | private final static Logger log = LoggerFactory.getLogger(ProxyArpManager.class); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 60 | |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 61 | private final long ARP_TIMER_PERIOD = 60000; //ms (== 1 min) |
Jonathan Hart | da4d0e1 | 2013-09-30 21:00:20 +1300 | [diff] [blame] | 62 | |
| 63 | private static final int ARP_REQUEST_TIMEOUT = 2000; //ms |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 64 | |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 65 | private IFloodlightProviderService floodlightProvider; |
| 66 | private ITopologyService topology; |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 67 | private IDatagridService datagrid; |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 68 | private IConfigInfoService configService; |
| 69 | private IRestApiService restApi; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 70 | |
Jonathan Hart | d6ed62b | 2013-11-01 13:18:25 -0700 | [diff] [blame] | 71 | private IDeviceStorage deviceStorage; |
Jonathan Hart | 9a21e0d | 2013-11-14 15:09:09 -0800 | [diff] [blame] | 72 | private volatile ITopoSwitchService topoSwitchService; |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 73 | private ITopoLinkService topoLinkService; |
Jonathan Hart | d6ed62b | 2013-11-01 13:18:25 -0700 | [diff] [blame] | 74 | |
Jonathan Hart | 1cf9de0 | 2013-10-21 17:42:29 -0700 | [diff] [blame] | 75 | private short vlan; |
| 76 | private static final short NO_VLAN = 0; |
| 77 | |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 78 | private ArpCache arpCache; |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 79 | |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 80 | private SetMultimap<InetAddress, ArpRequest> arpRequests; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 81 | |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 82 | private static class ArpRequest { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 83 | private final IArpRequester requester; |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 84 | private final boolean retry; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 85 | private long requestTime; |
| 86 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 87 | public ArpRequest(IArpRequester requester, boolean retry){ |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 88 | this.requester = requester; |
| 89 | this.retry = retry; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 90 | this.requestTime = System.currentTimeMillis(); |
| 91 | } |
| 92 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 93 | public ArpRequest(ArpRequest old) { |
| 94 | this.requester = old.requester; |
| 95 | this.retry = old.retry; |
| 96 | this.requestTime = System.currentTimeMillis(); |
| 97 | } |
| 98 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 99 | public boolean isExpired() { |
Jonathan Hart | da4d0e1 | 2013-09-30 21:00:20 +1300 | [diff] [blame] | 100 | return (System.currentTimeMillis() - requestTime) > ARP_REQUEST_TIMEOUT; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 101 | } |
| 102 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 103 | public boolean shouldRetry() { |
| 104 | return retry; |
| 105 | } |
| 106 | |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 107 | public void dispatchReply(InetAddress ipAddress, MACAddress replyMacAddress) { |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 108 | requester.arpResponse(ipAddress, replyMacAddress); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 109 | } |
| 110 | } |
| 111 | |
Jonathan Hart | da4d0e1 | 2013-09-30 21:00:20 +1300 | [diff] [blame] | 112 | private class HostArpRequester implements IArpRequester { |
| 113 | private final ARP arpRequest; |
| 114 | private final long dpid; |
| 115 | private final short port; |
| 116 | |
| 117 | public HostArpRequester(ARP arpRequest, long dpid, short port) { |
| 118 | this.arpRequest = arpRequest; |
| 119 | this.dpid = dpid; |
| 120 | this.port = port; |
| 121 | } |
| 122 | |
| 123 | @Override |
| 124 | public void arpResponse(InetAddress ipAddress, MACAddress macAddress) { |
| 125 | ProxyArpManager.this.sendArpReply(arpRequest, dpid, port, macAddress); |
| 126 | } |
| 127 | } |
| 128 | |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 129 | /* |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 130 | public ProxyArpManager(IFloodlightProviderService floodlightProvider, |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 131 | ITopologyService topology, IConfigInfoService configService, |
Jonathan Hart | 5afde49 | 2013-10-01 12:30:53 +1300 | [diff] [blame] | 132 | IRestApiService restApi){ |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 133 | |
| 134 | } |
| 135 | */ |
| 136 | |
| 137 | public void init(IFloodlightProviderService floodlightProvider, |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 138 | ITopologyService topology, IDatagridService datagrid, |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 139 | IConfigInfoService config, IRestApiService restApi){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 140 | this.floodlightProvider = floodlightProvider; |
| 141 | this.topology = topology; |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 142 | this.datagrid = datagrid; |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 143 | this.configService = config; |
Jonathan Hart | 5afde49 | 2013-10-01 12:30:53 +1300 | [diff] [blame] | 144 | this.restApi = restApi; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 145 | |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 146 | arpCache = new ArpCache(); |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 147 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 148 | arpRequests = Multimaps.synchronizedSetMultimap( |
| 149 | HashMultimap.<InetAddress, ArpRequest>create()); |
Jonathan Hart | 9a21e0d | 2013-11-14 15:09:09 -0800 | [diff] [blame] | 150 | |
| 151 | topoSwitchService = new TopoSwitchServiceImpl(); |
| 152 | topoLinkService = new TopoLinkServiceImpl(); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 153 | } |
| 154 | |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 155 | public void startUp() { |
| 156 | this.vlan = configService.getVlan(); |
Jonathan Hart | 1cf9de0 | 2013-10-21 17:42:29 -0700 | [diff] [blame] | 157 | log.info("vlan set to {}", this.vlan); |
| 158 | |
Jonathan Hart | 5afde49 | 2013-10-01 12:30:53 +1300 | [diff] [blame] | 159 | restApi.addRestletRoutable(new ArpWebRoutable()); |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 160 | floodlightProvider.addOFMessageListener(OFType.PACKET_IN, this); |
Jonathan Hart | 5afde49 | 2013-10-01 12:30:53 +1300 | [diff] [blame] | 161 | |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 162 | datagrid.registerArpEventHandler(this); |
| 163 | |
Jonathan Hart | d6ed62b | 2013-11-01 13:18:25 -0700 | [diff] [blame] | 164 | deviceStorage = new DeviceStorageImpl(); |
| 165 | deviceStorage.init(""); |
| 166 | |
Jonathan Hart | 4aa2b4e | 2013-09-24 14:50:23 +1200 | [diff] [blame] | 167 | Timer arpTimer = new Timer("arp-processing"); |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 168 | arpTimer.scheduleAtFixedRate(new TimerTask() { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 169 | @Override |
| 170 | public void run() { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 171 | doPeriodicArpProcessing(); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 172 | } |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 173 | }, 0, ARP_TIMER_PERIOD); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 174 | } |
| 175 | |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 176 | /* |
| 177 | * Function that runs periodically to manage the asynchronous request mechanism. |
| 178 | * It basically cleans up old ARP requests if we don't get a response for them. |
| 179 | * The caller can designate that a request should be retried indefinitely, and |
| 180 | * this task will handle that as well. |
| 181 | */ |
| 182 | private void doPeriodicArpProcessing() { |
| 183 | SetMultimap<InetAddress, ArpRequest> retryList |
| 184 | = HashMultimap.<InetAddress, ArpRequest>create(); |
| 185 | |
| 186 | //Have to synchronize externally on the Multimap while using an iterator, |
| 187 | //even though it's a synchronizedMultimap |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 188 | synchronized (arpRequests) { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 189 | log.debug("Current have {} outstanding requests", |
| 190 | arpRequests.size()); |
| 191 | |
| 192 | Iterator<Map.Entry<InetAddress, ArpRequest>> it |
| 193 | = arpRequests.entries().iterator(); |
| 194 | |
| 195 | while (it.hasNext()) { |
| 196 | Map.Entry<InetAddress, ArpRequest> entry |
| 197 | = it.next(); |
| 198 | ArpRequest request = entry.getValue(); |
| 199 | if (request.isExpired()) { |
| 200 | log.debug("Cleaning expired ARP request for {}", |
| 201 | entry.getKey().getHostAddress()); |
| 202 | |
| 203 | it.remove(); |
| 204 | |
| 205 | if (request.shouldRetry()) { |
| 206 | retryList.put(entry.getKey(), request); |
| 207 | } |
| 208 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 209 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 210 | } |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 211 | |
| 212 | for (Map.Entry<InetAddress, Collection<ArpRequest>> entry |
| 213 | : retryList.asMap().entrySet()) { |
| 214 | |
| 215 | InetAddress address = entry.getKey(); |
| 216 | |
| 217 | log.debug("Resending ARP request for {}", address.getHostAddress()); |
| 218 | |
| 219 | sendArpRequestForAddress(address); |
| 220 | |
| 221 | for (ArpRequest request : entry.getValue()) { |
| 222 | arpRequests.put(address, new ArpRequest(request)); |
| 223 | } |
| 224 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 225 | } |
| 226 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 227 | @Override |
| 228 | public String getName() { |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 229 | return "proxyarpmanager"; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | @Override |
| 233 | public boolean isCallbackOrderingPrereq(OFType type, String name) { |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 234 | if (type == OFType.PACKET_IN) { |
| 235 | return "devicemanager".equals(name); |
| 236 | } |
| 237 | else { |
| 238 | return false; |
| 239 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | @Override |
| 243 | public boolean isCallbackOrderingPostreq(OFType type, String name) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 244 | return false; |
| 245 | } |
| 246 | |
| 247 | @Override |
| 248 | public Command receive( |
| 249 | IOFSwitch sw, OFMessage msg, FloodlightContext cntx) { |
| 250 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 251 | OFPacketIn pi = (OFPacketIn) msg; |
| 252 | |
| 253 | Ethernet eth = IFloodlightProviderService.bcStore.get(cntx, |
| 254 | IFloodlightProviderService.CONTEXT_PI_PAYLOAD); |
| 255 | |
| 256 | if (eth.getEtherType() == Ethernet.TYPE_ARP){ |
Jonathan Hart | 5ea7cc0 | 2013-11-12 11:56:23 -0800 | [diff] [blame] | 257 | ARP arp = (ARP) eth.getPayload(); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 258 | if (arp.getOpCode() == ARP.OP_REQUEST) { |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 259 | //TODO check what the DeviceManager does about propagating |
| 260 | //or swallowing ARPs. We want to go after DeviceManager in the |
| 261 | //chain but we really need it to CONTINUE ARP packets so we can |
| 262 | //get them. |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 263 | handleArpRequest(sw, pi, arp, eth); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 264 | } |
| 265 | else if (arp.getOpCode() == ARP.OP_REPLY) { |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 266 | //handleArpReply(sw, pi, arp); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 267 | } |
| 268 | } |
| 269 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 270 | //TODO should we propagate ARP or swallow it? |
| 271 | //Always propagate for now so DeviceManager can learn the host location |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 272 | return Command.CONTINUE; |
| 273 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 274 | |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 275 | private void handleArpRequest(IOFSwitch sw, OFPacketIn pi, ARP arp, Ethernet eth) { |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 276 | if (log.isTraceEnabled()) { |
| 277 | log.trace("ARP request received for {}", |
| 278 | inetAddressToString(arp.getTargetProtocolAddress())); |
| 279 | } |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 280 | |
| 281 | InetAddress target; |
| 282 | try { |
| 283 | target = InetAddress.getByAddress(arp.getTargetProtocolAddress()); |
| 284 | } catch (UnknownHostException e) { |
| 285 | log.debug("Invalid address in ARP request", e); |
| 286 | return; |
| 287 | } |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 288 | |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 289 | if (configService.fromExternalNetwork(sw.getId(), pi.getInPort())) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 290 | //If the request came from outside our network, we only care if |
| 291 | //it was a request for one of our interfaces. |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 292 | if (configService.isInterfaceAddress(target)) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 293 | log.trace("ARP request for our interface. Sending reply {} => {}", |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 294 | target.getHostAddress(), configService.getRouterMacAddress()); |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 295 | |
| 296 | sendArpReply(arp, sw.getId(), pi.getInPort(), |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 297 | configService.getRouterMacAddress()); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 298 | } |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 299 | |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 300 | return; |
| 301 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 302 | |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 303 | //MACAddress macAddress = arpCache.lookup(target); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 304 | |
Jonathan Hart | d6ed62b | 2013-11-01 13:18:25 -0700 | [diff] [blame] | 305 | IDeviceObject targetDevice = |
| 306 | deviceStorage.getDeviceByIP(InetAddresses.coerceToInteger(target)); |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 307 | |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 308 | log.debug("targetDevice: {}", targetDevice); |
| 309 | |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 310 | if (targetDevice != null) { |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 311 | // We have the device in our database, so send a reply |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 312 | MACAddress macAddress = MACAddress.valueOf(targetDevice.getMACAddress()); |
| 313 | |
| 314 | if (log.isTraceEnabled()) { |
| 315 | log.trace("Sending reply: {} => {} to host at {}/{}", new Object [] { |
| 316 | inetAddressToString(arp.getTargetProtocolAddress()), |
| 317 | macAddress.toString(), |
| 318 | HexString.toHexString(sw.getId()), pi.getInPort()}); |
| 319 | } |
| 320 | |
| 321 | sendArpReply(arp, sw.getId(), pi.getInPort(), macAddress); |
| 322 | } |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 323 | else { |
| 324 | // We don't know the device so broadcast the request out |
| 325 | // the edge of the network |
| 326 | |
| 327 | //Record where the request came from so we know where to send the reply |
| 328 | arpRequests.put(target, new ArpRequest( |
| 329 | new HostArpRequester(arp, sw.getId(), pi.getInPort()), false)); |
| 330 | |
Jonathan Hart | 5ea7cc0 | 2013-11-12 11:56:23 -0800 | [diff] [blame] | 331 | sendToOtherNodes(eth, pi); |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 332 | } |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 333 | |
| 334 | /*if (macAddress == null){ |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 335 | //MAC address is not in our ARP cache. |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 336 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 337 | //Record where the request came from so we know where to send the reply |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 338 | //arpRequests.put(target, new ArpRequest( |
| 339 | //new HostArpRequester(arp, sw.getId(), pi.getInPort()), false)); |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 340 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 341 | //Flood the request out edge ports |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 342 | //sendArpRequestToSwitches(target, pi.getPacketData(), sw.getId(), pi.getInPort()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 343 | } |
| 344 | else { |
| 345 | //We know the address, so send a reply |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 346 | if (log.isTraceEnabled()) { |
| 347 | log.trace("Sending reply: {} => {} to host at {}/{}", new Object [] { |
| 348 | inetAddressToString(arp.getTargetProtocolAddress()), |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 349 | macAddress.toString(), |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 350 | HexString.toHexString(sw.getId()), pi.getInPort()}); |
| 351 | } |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 352 | |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 353 | sendArpReply(arp, sw.getId(), pi.getInPort(), macAddress); |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 354 | }*/ |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 355 | } |
| 356 | |
Jonathan Hart | 1912afc | 2013-10-11 12:02:44 +1300 | [diff] [blame] | 357 | private void handleArpReply(IOFSwitch sw, OFPacketIn pi, ARP arp){ |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 358 | if (log.isTraceEnabled()) { |
| 359 | log.trace("ARP reply recieved: {} => {}, on {}/{}", new Object[] { |
| 360 | inetAddressToString(arp.getSenderProtocolAddress()), |
| 361 | HexString.toHexString(arp.getSenderHardwareAddress()), |
| 362 | HexString.toHexString(sw.getId()), pi.getInPort()}); |
| 363 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 364 | |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 365 | InetAddress senderIpAddress; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 366 | try { |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 367 | senderIpAddress = InetAddress.getByAddress(arp.getSenderProtocolAddress()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 368 | } catch (UnknownHostException e) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 369 | log.debug("Invalid address in ARP reply", e); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 370 | return; |
| 371 | } |
| 372 | |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 373 | MACAddress senderMacAddress = MACAddress.valueOf(arp.getSenderHardwareAddress()); |
| 374 | |
| 375 | arpCache.update(senderIpAddress, senderMacAddress); |
| 376 | |
| 377 | //See if anyone's waiting for this ARP reply |
| 378 | Set<ArpRequest> requests = arpRequests.get(senderIpAddress); |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 379 | |
| 380 | //Synchronize on the Multimap while using an iterator for one of the sets |
Jonathan Hart | e751e1c | 2013-08-23 00:48:47 +1200 | [diff] [blame] | 381 | List<ArpRequest> requestsToSend = new ArrayList<ArpRequest>(requests.size()); |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 382 | synchronized (arpRequests) { |
| 383 | Iterator<ArpRequest> it = requests.iterator(); |
| 384 | while (it.hasNext()) { |
| 385 | ArpRequest request = it.next(); |
| 386 | it.remove(); |
Jonathan Hart | e751e1c | 2013-08-23 00:48:47 +1200 | [diff] [blame] | 387 | requestsToSend.add(request); |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 388 | } |
| 389 | } |
Jonathan Hart | e751e1c | 2013-08-23 00:48:47 +1200 | [diff] [blame] | 390 | |
| 391 | //Don't hold an ARP lock while dispatching requests |
| 392 | for (ArpRequest request : requestsToSend) { |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 393 | request.dispatchReply(senderIpAddress, senderMacAddress); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 394 | } |
| 395 | } |
| 396 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 397 | private void sendArpRequestForAddress(InetAddress ipAddress) { |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 398 | //TODO what should the sender IP address and MAC address be if no |
| 399 | //IP addresses are configured? Will there ever be a need to send |
| 400 | //ARP requests from the controller in that case? |
| 401 | //All-zero MAC address doesn't seem to work - hosts don't respond to it |
| 402 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 403 | byte[] zeroIpv4 = {0x0, 0x0, 0x0, 0x0}; |
| 404 | byte[] zeroMac = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 405 | byte[] genericNonZeroMac = {0x0, 0x0, 0x0, 0x0, 0x0, 0x01}; |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 406 | byte[] broadcastMac = {(byte)0xff, (byte)0xff, (byte)0xff, |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 407 | (byte)0xff, (byte)0xff, (byte)0xff}; |
| 408 | |
| 409 | ARP arpRequest = new ARP(); |
| 410 | |
| 411 | arpRequest.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| 412 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 413 | .setHardwareAddressLength((byte)Ethernet.DATALAYER_ADDRESS_LENGTH) |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 414 | .setProtocolAddressLength((byte)IPv4.ADDRESS_LENGTH) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 415 | .setOpCode(ARP.OP_REQUEST) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 416 | .setTargetHardwareAddress(zeroMac) |
| 417 | .setTargetProtocolAddress(ipAddress.getAddress()); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 418 | |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 419 | MACAddress routerMacAddress = configService.getRouterMacAddress(); |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 420 | //TODO hack for now as it's unclear what the MAC address should be |
| 421 | byte[] senderMacAddress = genericNonZeroMac; |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 422 | if (routerMacAddress != null) { |
| 423 | senderMacAddress = routerMacAddress.toBytes(); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 424 | } |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 425 | arpRequest.setSenderHardwareAddress(senderMacAddress); |
| 426 | |
| 427 | byte[] senderIPAddress = zeroIpv4; |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 428 | Interface intf = configService.getOutgoingInterface(ipAddress); |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 429 | if (intf != null) { |
| 430 | senderIPAddress = intf.getIpAddress().getAddress(); |
| 431 | } |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 432 | |
| 433 | arpRequest.setSenderProtocolAddress(senderIPAddress); |
| 434 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 435 | Ethernet eth = new Ethernet(); |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 436 | eth.setSourceMACAddress(senderMacAddress) |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 437 | .setDestinationMACAddress(broadcastMac) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 438 | .setEtherType(Ethernet.TYPE_ARP) |
| 439 | .setPayload(arpRequest); |
| 440 | |
Jonathan Hart | 1cf9de0 | 2013-10-21 17:42:29 -0700 | [diff] [blame] | 441 | if (vlan != NO_VLAN) { |
| 442 | eth.setVlanID(vlan) |
| 443 | .setPriorityCode((byte)0); |
| 444 | } |
| 445 | |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 446 | sendArpRequestToSwitches(ipAddress, eth.serialize()); |
| 447 | } |
| 448 | |
| 449 | private void sendArpRequestToSwitches(InetAddress dstAddress, byte[] arpRequest) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 450 | sendArpRequestToSwitches(dstAddress, arpRequest, |
| 451 | 0, OFPort.OFPP_NONE.getValue()); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 452 | } |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 453 | |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 454 | private void sendArpRequestToSwitches(InetAddress dstAddress, byte[] arpRequest, |
| 455 | long inSwitch, short inPort) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 456 | |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 457 | if (configService.hasLayer3Configuration()) { |
| 458 | Interface intf = configService.getOutgoingInterface(dstAddress); |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 459 | if (intf != null) { |
| 460 | sendArpRequestOutPort(arpRequest, intf.getDpid(), intf.getPort()); |
| 461 | } |
| 462 | else { |
| 463 | //TODO here it should be broadcast out all non-interface edge ports. |
| 464 | //I think we can assume that if it's not a request for an external |
| 465 | //network, it's an ARP for a host in our own network. So we want to |
| 466 | //send it out all edge ports that don't have an interface configured |
| 467 | //to ensure it reaches all hosts in our network. |
| 468 | log.debug("No interface found to send ARP request for {}", |
| 469 | dstAddress.getHostAddress()); |
| 470 | } |
| 471 | } |
| 472 | else { |
| 473 | broadcastArpRequestOutEdge(arpRequest, inSwitch, inPort); |
| 474 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 475 | } |
| 476 | |
Jonathan Hart | 5ea7cc0 | 2013-11-12 11:56:23 -0800 | [diff] [blame] | 477 | private void sendToOtherNodes(Ethernet eth, OFPacketIn pi) { |
| 478 | ARP arp = (ARP) eth.getPayload(); |
Jonathan Hart | d300325 | 2013-11-15 09:44:46 -0800 | [diff] [blame] | 479 | |
Jonathan Hart | 5ea7cc0 | 2013-11-12 11:56:23 -0800 | [diff] [blame] | 480 | if (log.isTraceEnabled()) { |
| 481 | log.trace("Sending ARP request for {} to other ONOS instances", |
Jonathan Hart | 9a21e0d | 2013-11-14 15:09:09 -0800 | [diff] [blame] | 482 | inetAddressToString(arp.getTargetProtocolAddress())); |
Jonathan Hart | 5ea7cc0 | 2013-11-12 11:56:23 -0800 | [diff] [blame] | 483 | } |
Jonathan Hart | d300325 | 2013-11-15 09:44:46 -0800 | [diff] [blame] | 484 | |
| 485 | InetAddress targetAddress; |
| 486 | try { |
| 487 | targetAddress = InetAddress.getByAddress(arp.getTargetProtocolAddress()); |
| 488 | } catch (UnknownHostException e) { |
| 489 | log.error("Unknown host", e); |
| 490 | return; |
| 491 | } |
| 492 | |
| 493 | datagrid.sendArpRequest(ArpMessage.newRequest(targetAddress, eth.serialize())); |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 494 | } |
| 495 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 496 | private void broadcastArpRequestOutEdge(byte[] arpRequest, long inSwitch, short inPort) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 497 | for (IOFSwitch sw : floodlightProvider.getSwitches().values()){ |
| 498 | Collection<Short> enabledPorts = sw.getEnabledPortNumbers(); |
| 499 | Set<Short> linkPorts = topology.getPortsWithLinks(sw.getId()); |
| 500 | |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 501 | if (linkPorts == null){ |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 502 | //I think this means the switch doesn't have any links. |
| 503 | //continue; |
| 504 | linkPorts = new HashSet<Short>(); |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 505 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 506 | |
Jonathan Hart | a18e479 | 2013-10-31 10:10:54 -0700 | [diff] [blame] | 507 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 508 | OFPacketOut po = new OFPacketOut(); |
| 509 | po.setInPort(OFPort.OFPP_NONE) |
| 510 | .setBufferId(-1) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 511 | .setPacketData(arpRequest); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 512 | |
| 513 | List<OFAction> actions = new ArrayList<OFAction>(); |
| 514 | |
| 515 | for (short portNum : enabledPorts){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 516 | if (linkPorts.contains(portNum) || |
| 517 | (sw.getId() == inSwitch && portNum == inPort)){ |
| 518 | //If this port isn't an edge port or is the ingress port |
| 519 | //for the ARP, don't broadcast out it |
| 520 | continue; |
| 521 | } |
| 522 | |
| 523 | actions.add(new OFActionOutput(portNum)); |
| 524 | } |
| 525 | |
| 526 | po.setActions(actions); |
| 527 | short actionsLength = (short) (actions.size() * OFActionOutput.MINIMUM_LENGTH); |
| 528 | po.setActionsLength(actionsLength); |
| 529 | po.setLengthU(OFPacketOut.MINIMUM_LENGTH + actionsLength |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 530 | + arpRequest.length); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 531 | |
| 532 | List<OFMessage> msgList = new ArrayList<OFMessage>(); |
| 533 | msgList.add(po); |
| 534 | |
| 535 | try { |
| 536 | sw.write(msgList, null); |
| 537 | sw.flush(); |
| 538 | } catch (IOException e) { |
| 539 | log.error("Failure writing packet out to switch", e); |
| 540 | } |
| 541 | } |
| 542 | } |
| 543 | |
Jonathan Hart | 9a21e0d | 2013-11-14 15:09:09 -0800 | [diff] [blame] | 544 | private void broadcastArpRequestOutMyEdge(byte[] arpRequest) { |
Jonathan Hart | ba9ced9 | 2013-11-24 16:52:13 -0800 | [diff] [blame^] | 545 | List<SwitchPort> switchPorts = new ArrayList<SwitchPort>(); |
| 546 | |
Jonathan Hart | 9a21e0d | 2013-11-14 15:09:09 -0800 | [diff] [blame] | 547 | for (IOFSwitch sw : floodlightProvider.getSwitches().values()) { |
| 548 | |
| 549 | OFPacketOut po = new OFPacketOut(); |
| 550 | po.setInPort(OFPort.OFPP_NONE) |
| 551 | .setBufferId(-1) |
| 552 | .setPacketData(arpRequest); |
| 553 | |
| 554 | List<OFAction> actions = new ArrayList<OFAction>(); |
| 555 | |
| 556 | Iterable<IPortObject> ports |
| 557 | = topoSwitchService.getPortsOnSwitch(sw.getStringId()); |
| 558 | if (ports == null) { |
| 559 | continue; |
| 560 | } |
| 561 | |
| 562 | for (IPortObject portObject : ports) { |
| 563 | if (!portObject.getLinkedPorts().iterator().hasNext()) { |
Jonathan Hart | ba9ced9 | 2013-11-24 16:52:13 -0800 | [diff] [blame^] | 564 | switchPorts.add(new SwitchPort(new Dpid(sw.getId()), |
| 565 | new Port(portObject.getNumber()))); |
Jonathan Hart | 9a21e0d | 2013-11-14 15:09:09 -0800 | [diff] [blame] | 566 | actions.add(new OFActionOutput(portObject.getNumber())); |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | po.setActions(actions); |
| 571 | short actionsLength = (short) |
| 572 | (actions.size() * OFActionOutput.MINIMUM_LENGTH); |
| 573 | po.setActionsLength(actionsLength); |
| 574 | po.setLengthU(OFPacketOut.MINIMUM_LENGTH + actionsLength |
| 575 | + arpRequest.length); |
| 576 | |
| 577 | try { |
| 578 | sw.write(po, null); |
| 579 | sw.flush(); |
| 580 | } catch (IOException e) { |
| 581 | log.error("Failure writing packet out to switch", e); |
| 582 | } |
| 583 | } |
Jonathan Hart | ba9ced9 | 2013-11-24 16:52:13 -0800 | [diff] [blame^] | 584 | |
| 585 | log.debug("Broadcast ARP request for to: {}", switchPorts); |
Jonathan Hart | 9a21e0d | 2013-11-14 15:09:09 -0800 | [diff] [blame] | 586 | } |
| 587 | |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 588 | private void sendArpRequestOutPort(byte[] arpRequest, long dpid, short port) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 589 | if (log.isTraceEnabled()) { |
| 590 | log.trace("Sending ARP request out {}/{}", |
| 591 | HexString.toHexString(dpid), port); |
| 592 | } |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 593 | |
| 594 | OFPacketOut po = new OFPacketOut(); |
| 595 | po.setInPort(OFPort.OFPP_NONE) |
| 596 | .setBufferId(-1) |
| 597 | .setPacketData(arpRequest); |
| 598 | |
| 599 | List<OFAction> actions = new ArrayList<OFAction>(); |
| 600 | actions.add(new OFActionOutput(port)); |
| 601 | po.setActions(actions); |
| 602 | short actionsLength = (short) (actions.size() * OFActionOutput.MINIMUM_LENGTH); |
| 603 | po.setActionsLength(actionsLength); |
| 604 | po.setLengthU(OFPacketOut.MINIMUM_LENGTH + actionsLength |
| 605 | + arpRequest.length); |
| 606 | |
| 607 | IOFSwitch sw = floodlightProvider.getSwitches().get(dpid); |
| 608 | |
| 609 | if (sw == null) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 610 | log.warn("Switch not found when sending ARP request"); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 611 | return; |
| 612 | } |
| 613 | |
| 614 | try { |
| 615 | sw.write(po, null); |
| 616 | sw.flush(); |
| 617 | } catch (IOException e) { |
| 618 | log.error("Failure writing packet out to switch", e); |
| 619 | } |
| 620 | } |
| 621 | |
Jonathan Hart | da4d0e1 | 2013-09-30 21:00:20 +1300 | [diff] [blame] | 622 | private void sendArpReply(ARP arpRequest, long dpid, short port, MACAddress targetMac) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 623 | if (log.isTraceEnabled()) { |
| 624 | log.trace("Sending reply {} => {} to {}", new Object[] { |
| 625 | inetAddressToString(arpRequest.getTargetProtocolAddress()), |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 626 | targetMac, |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 627 | inetAddressToString(arpRequest.getSenderProtocolAddress())}); |
| 628 | } |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 629 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 630 | ARP arpReply = new ARP(); |
| 631 | arpReply.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| 632 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 633 | .setHardwareAddressLength((byte)Ethernet.DATALAYER_ADDRESS_LENGTH) |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame] | 634 | .setProtocolAddressLength((byte)IPv4.ADDRESS_LENGTH) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 635 | .setOpCode(ARP.OP_REPLY) |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 636 | .setSenderHardwareAddress(targetMac.toBytes()) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 637 | .setSenderProtocolAddress(arpRequest.getTargetProtocolAddress()) |
| 638 | .setTargetHardwareAddress(arpRequest.getSenderHardwareAddress()) |
| 639 | .setTargetProtocolAddress(arpRequest.getSenderProtocolAddress()); |
| 640 | |
Jonathan Hart | 1cf9de0 | 2013-10-21 17:42:29 -0700 | [diff] [blame] | 641 | |
| 642 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 643 | Ethernet eth = new Ethernet(); |
| 644 | eth.setDestinationMACAddress(arpRequest.getSenderHardwareAddress()) |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 645 | .setSourceMACAddress(targetMac.toBytes()) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 646 | .setEtherType(Ethernet.TYPE_ARP) |
| 647 | .setPayload(arpReply); |
| 648 | |
Jonathan Hart | 1cf9de0 | 2013-10-21 17:42:29 -0700 | [diff] [blame] | 649 | if (vlan != NO_VLAN) { |
| 650 | eth.setVlanID(vlan) |
| 651 | .setPriorityCode((byte)0); |
| 652 | } |
| 653 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 654 | List<OFAction> actions = new ArrayList<OFAction>(); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 655 | actions.add(new OFActionOutput(port)); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 656 | |
| 657 | OFPacketOut po = new OFPacketOut(); |
| 658 | po.setInPort(OFPort.OFPP_NONE) |
| 659 | .setBufferId(-1) |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 660 | .setPacketData(eth.serialize()) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 661 | .setActions(actions) |
| 662 | .setActionsLength((short)OFActionOutput.MINIMUM_LENGTH) |
| 663 | .setLengthU(OFPacketOut.MINIMUM_LENGTH + OFActionOutput.MINIMUM_LENGTH |
| 664 | + po.getPacketData().length); |
| 665 | |
| 666 | List<OFMessage> msgList = new ArrayList<OFMessage>(); |
| 667 | msgList.add(po); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 668 | |
| 669 | IOFSwitch sw = floodlightProvider.getSwitches().get(dpid); |
| 670 | |
| 671 | if (sw == null) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 672 | log.warn("Switch {} not found when sending ARP reply", |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 673 | HexString.toHexString(dpid)); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 674 | return; |
| 675 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 676 | |
| 677 | try { |
| 678 | sw.write(msgList, null); |
| 679 | sw.flush(); |
| 680 | } catch (IOException e) { |
Jonathan Hart | 5b803bc | 2013-09-23 14:46:11 +1200 | [diff] [blame] | 681 | log.error("Failure writing packet out to switch", e); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 682 | } |
| 683 | } |
Jonathan Hart | da4d0e1 | 2013-09-30 21:00:20 +1300 | [diff] [blame] | 684 | |
| 685 | private String inetAddressToString(byte[] bytes) { |
| 686 | try { |
| 687 | return InetAddress.getByAddress(bytes).getHostAddress(); |
| 688 | } catch (UnknownHostException e) { |
| 689 | log.debug("Invalid IP address", e); |
| 690 | return ""; |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | /* |
| 695 | * IProxyArpService methods |
| 696 | */ |
Jonathan Hart | c824ad0 | 2013-07-03 15:58:45 +1200 | [diff] [blame] | 697 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 698 | @Override |
Jonathan Hart | abad6a5 | 2013-09-30 18:17:21 +1300 | [diff] [blame] | 699 | public MACAddress getMacAddress(InetAddress ipAddress) { |
| 700 | return arpCache.lookup(ipAddress); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 701 | } |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 702 | |
| 703 | @Override |
| 704 | public void sendArpRequest(InetAddress ipAddress, IArpRequester requester, |
| 705 | boolean retry) { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 706 | arpRequests.put(ipAddress, new ArpRequest(requester, retry)); |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 707 | |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 708 | //Sanity check to make sure we don't send a request for our own address |
Jonathan Hart | a888764 | 2013-10-28 13:46:54 -0700 | [diff] [blame] | 709 | if (!configService.isInterfaceAddress(ipAddress)) { |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 710 | sendArpRequestForAddress(ipAddress); |
| 711 | } |
| 712 | } |
Jonathan Hart | 5afde49 | 2013-10-01 12:30:53 +1300 | [diff] [blame] | 713 | |
| 714 | @Override |
| 715 | public List<String> getMappings() { |
| 716 | return arpCache.getMappings(); |
| 717 | } |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 718 | |
| 719 | /* |
| 720 | * IArpEventHandler methods |
| 721 | */ |
| 722 | |
| 723 | @Override |
Jonathan Hart | d300325 | 2013-11-15 09:44:46 -0800 | [diff] [blame] | 724 | public void arpRequestNotification(ArpMessage arpMessage) { |
Jonathan Hart | ba9ced9 | 2013-11-24 16:52:13 -0800 | [diff] [blame^] | 725 | //log.debug("Received ARP notification from other instances"); |
Jonathan Hart | d300325 | 2013-11-15 09:44:46 -0800 | [diff] [blame] | 726 | |
| 727 | switch (arpMessage.getType()){ |
| 728 | case REQUEST: |
Jonathan Hart | ba9ced9 | 2013-11-24 16:52:13 -0800 | [diff] [blame^] | 729 | log.debug("Received ARP request notification for {}", |
| 730 | arpMessage.getAddress()); |
Jonathan Hart | d300325 | 2013-11-15 09:44:46 -0800 | [diff] [blame] | 731 | broadcastArpRequestOutMyEdge(arpMessage.getPacket()); |
| 732 | break; |
| 733 | case REPLY: |
Jonathan Hart | ba9ced9 | 2013-11-24 16:52:13 -0800 | [diff] [blame^] | 734 | log.debug("Received ARP reply notification for {}", |
| 735 | arpMessage.getAddress()); |
Jonathan Hart | d300325 | 2013-11-15 09:44:46 -0800 | [diff] [blame] | 736 | sendArpReplyToWaitingRequesters(arpMessage.getAddress()); |
| 737 | break; |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | private void sendArpReplyToWaitingRequesters(InetAddress address) { |
| 742 | log.debug("Sending ARP reply for {} to requesters", |
| 743 | address.getHostAddress()); |
| 744 | |
| 745 | //See if anyone's waiting for this ARP reply |
| 746 | Set<ArpRequest> requests = arpRequests.get(address); |
| 747 | |
| 748 | //Synchronize on the Multimap while using an iterator for one of the sets |
| 749 | List<ArpRequest> requestsToSend = new ArrayList<ArpRequest>(requests.size()); |
| 750 | synchronized (arpRequests) { |
| 751 | Iterator<ArpRequest> it = requests.iterator(); |
| 752 | while (it.hasNext()) { |
| 753 | ArpRequest request = it.next(); |
| 754 | it.remove(); |
| 755 | requestsToSend.add(request); |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | IDeviceObject deviceObject = deviceStorage.getDeviceByIP( |
| 760 | InetAddresses.coerceToInteger(address)); |
| 761 | |
| 762 | MACAddress mac = MACAddress.valueOf(deviceObject.getMACAddress()); |
| 763 | |
| 764 | log.debug("Found {} at {} in network map", |
| 765 | address.getHostAddress(), mac); |
| 766 | |
| 767 | //Don't hold an ARP lock while dispatching requests |
| 768 | for (ArpRequest request : requestsToSend) { |
| 769 | request.dispatchReply(address, mac); |
| 770 | } |
Jonathan Hart | 18ad55c | 2013-11-11 22:49:55 -0800 | [diff] [blame] | 771 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 772 | } |