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; |
| 8 | import java.util.HashMap; |
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; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 20 | import net.floodlightcontroller.devicemanager.IDeviceService; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 21 | import net.floodlightcontroller.packet.ARP; |
| 22 | import net.floodlightcontroller.packet.Ethernet; |
| 23 | import net.floodlightcontroller.topology.ITopologyService; |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 24 | import net.floodlightcontroller.util.MACAddress; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 25 | |
| 26 | import org.openflow.protocol.OFMessage; |
| 27 | import org.openflow.protocol.OFPacketIn; |
| 28 | import org.openflow.protocol.OFPacketOut; |
| 29 | import org.openflow.protocol.OFPort; |
| 30 | import org.openflow.protocol.OFType; |
| 31 | import org.openflow.protocol.action.OFAction; |
| 32 | import org.openflow.protocol.action.OFActionOutput; |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 33 | import org.openflow.util.HexString; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 34 | import org.slf4j.Logger; |
| 35 | import org.slf4j.LoggerFactory; |
| 36 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 37 | import com.google.common.collect.HashMultimap; |
| 38 | import com.google.common.collect.Multimaps; |
| 39 | import com.google.common.collect.SetMultimap; |
| 40 | |
Jonathan Hart | 32e1822 | 2013-08-07 22:05:42 +1200 | [diff] [blame^] | 41 | //TODO have L2 and also L3 mode, where it takes into account interface addresses |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 42 | public class ProxyArpManager implements IProxyArpService, IOFMessageListener { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 43 | private static Logger log = LoggerFactory.getLogger(ProxyArpManager.class); |
| 44 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 45 | private final long ARP_ENTRY_TIMEOUT = 600000; //ms (== 10 mins) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 46 | |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 47 | private final long ARP_TIMER_PERIOD = 60000; //ms (== 1 min) |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 48 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 49 | protected IFloodlightProviderService floodlightProvider; |
| 50 | protected ITopologyService topology; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 51 | protected IDeviceService devices; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 52 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 53 | protected Map<InetAddress, ArpTableEntry> arpTable; |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 54 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 55 | protected SetMultimap<InetAddress, ArpRequest> arpRequests; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 56 | |
| 57 | private class ArpRequest { |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 58 | private IArpRequester requester; |
| 59 | private boolean retry; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 60 | private long requestTime; |
| 61 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 62 | public ArpRequest(IArpRequester requester, boolean retry){ |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 63 | this.requester = requester; |
| 64 | this.retry = retry; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 65 | this.requestTime = System.currentTimeMillis(); |
| 66 | } |
| 67 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 68 | public ArpRequest(ArpRequest old) { |
| 69 | this.requester = old.requester; |
| 70 | this.retry = old.retry; |
| 71 | this.requestTime = System.currentTimeMillis(); |
| 72 | } |
| 73 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 74 | public boolean isExpired() { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 75 | return (System.currentTimeMillis() - requestTime) |
| 76 | > IProxyArpService.ARP_REQUEST_TIMEOUT; |
| 77 | } |
| 78 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 79 | public boolean shouldRetry() { |
| 80 | return retry; |
| 81 | } |
| 82 | |
Jonathan Hart | 32e1822 | 2013-08-07 22:05:42 +1200 | [diff] [blame^] | 83 | public void dispatchReply(InetAddress ipAddress, byte[] replyMacAddress) { |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 84 | log.debug("Dispatching reply for {} to {}", ipAddress.getHostAddress(), |
| 85 | requester); |
| 86 | requester.arpResponse(ipAddress, replyMacAddress); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 87 | } |
| 88 | } |
| 89 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 90 | public ProxyArpManager(IFloodlightProviderService floodlightProvider, |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 91 | ITopologyService topology, IDeviceService devices){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 92 | this.floodlightProvider = floodlightProvider; |
| 93 | this.topology = topology; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 94 | this.devices = devices; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 95 | |
| 96 | arpTable = new HashMap<InetAddress, ArpTableEntry>(); |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 97 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 98 | arpRequests = Multimaps.synchronizedSetMultimap( |
| 99 | HashMultimap.<InetAddress, ArpRequest>create()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 100 | |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 101 | Timer arpTimer = new Timer(); |
| 102 | arpTimer.scheduleAtFixedRate(new TimerTask() { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 103 | @Override |
| 104 | public void run() { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 105 | doPeriodicArpProcessing(); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 106 | } |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 107 | }, 0, ARP_TIMER_PERIOD); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 108 | } |
| 109 | |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 110 | /* |
| 111 | * Function that runs periodically to manage the asynchronous request mechanism. |
| 112 | * It basically cleans up old ARP requests if we don't get a response for them. |
| 113 | * The caller can designate that a request should be retried indefinitely, and |
| 114 | * this task will handle that as well. |
| 115 | */ |
| 116 | private void doPeriodicArpProcessing() { |
| 117 | SetMultimap<InetAddress, ArpRequest> retryList |
| 118 | = HashMultimap.<InetAddress, ArpRequest>create(); |
| 119 | |
| 120 | //Have to synchronize externally on the Multimap while using an iterator, |
| 121 | //even though it's a synchronizedMultimap |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 122 | synchronized (arpRequests) { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 123 | log.debug("Current have {} outstanding requests", |
| 124 | arpRequests.size()); |
| 125 | |
| 126 | Iterator<Map.Entry<InetAddress, ArpRequest>> it |
| 127 | = arpRequests.entries().iterator(); |
| 128 | |
| 129 | while (it.hasNext()) { |
| 130 | Map.Entry<InetAddress, ArpRequest> entry |
| 131 | = it.next(); |
| 132 | ArpRequest request = entry.getValue(); |
| 133 | if (request.isExpired()) { |
| 134 | log.debug("Cleaning expired ARP request for {}", |
| 135 | entry.getKey().getHostAddress()); |
| 136 | |
| 137 | it.remove(); |
| 138 | |
| 139 | if (request.shouldRetry()) { |
| 140 | retryList.put(entry.getKey(), request); |
| 141 | } |
| 142 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 143 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 144 | } |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 145 | |
| 146 | for (Map.Entry<InetAddress, Collection<ArpRequest>> entry |
| 147 | : retryList.asMap().entrySet()) { |
| 148 | |
| 149 | InetAddress address = entry.getKey(); |
| 150 | |
| 151 | log.debug("Resending ARP request for {}", address.getHostAddress()); |
| 152 | |
| 153 | sendArpRequestForAddress(address); |
| 154 | |
| 155 | for (ArpRequest request : entry.getValue()) { |
| 156 | arpRequests.put(address, new ArpRequest(request)); |
| 157 | } |
| 158 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 159 | } |
| 160 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 161 | @Override |
| 162 | public String getName() { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 163 | return "ProxyArpManager"; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | @Override |
| 167 | public boolean isCallbackOrderingPrereq(OFType type, String name) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 168 | return false; |
| 169 | } |
| 170 | |
| 171 | @Override |
| 172 | public boolean isCallbackOrderingPostreq(OFType type, String name) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 173 | return false; |
| 174 | } |
| 175 | |
| 176 | @Override |
| 177 | public Command receive( |
| 178 | IOFSwitch sw, OFMessage msg, FloodlightContext cntx) { |
| 179 | |
| 180 | if (msg.getType() != OFType.PACKET_IN){ |
| 181 | return Command.CONTINUE; |
| 182 | } |
| 183 | |
| 184 | OFPacketIn pi = (OFPacketIn) msg; |
| 185 | |
| 186 | Ethernet eth = IFloodlightProviderService.bcStore.get(cntx, |
| 187 | IFloodlightProviderService.CONTEXT_PI_PAYLOAD); |
| 188 | |
| 189 | if (eth.getEtherType() == Ethernet.TYPE_ARP){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 190 | ARP arp = (ARP) eth.getPayload(); |
| 191 | |
| 192 | if (arp.getOpCode() == ARP.OP_REQUEST) { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 193 | handleArpRequest(sw, pi, arp); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 194 | } |
| 195 | else if (arp.getOpCode() == ARP.OP_REPLY) { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 196 | handleArpReply(sw, pi, arp); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 197 | } |
| 198 | } |
| 199 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 200 | //TODO should we propagate ARP or swallow it? |
| 201 | //Always propagate for now so DeviceManager can learn the host location |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 202 | return Command.CONTINUE; |
| 203 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 204 | |
| 205 | protected void handleArpRequest(IOFSwitch sw, OFPacketIn pi, ARP arp) { |
| 206 | log.debug("ARP request received for {}", |
| 207 | bytesToStringAddr(arp.getTargetProtocolAddress())); |
| 208 | |
| 209 | byte[] mac = lookupArpTable(arp.getTargetProtocolAddress()); |
| 210 | |
| 211 | if (mac == null){ |
| 212 | //Mac address is not in our arp table. |
| 213 | |
| 214 | //TODO check what the DeviceManager thinks |
| 215 | |
| 216 | //Record where the request came from so we know where to send the reply |
| 217 | InetAddress target; |
| 218 | try { |
| 219 | target = InetAddress.getByAddress(arp.getTargetProtocolAddress()); |
| 220 | } catch (UnknownHostException e) { |
| 221 | log.debug("Invalid address in ARP request", e); |
| 222 | //return Command.CONTINUE; //Continue or stop? |
| 223 | return; |
| 224 | } |
| 225 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 226 | boolean shouldBroadcastRequest = false; |
| 227 | synchronized (arpRequests) { |
| 228 | if (!arpRequests.containsKey(target)) { |
| 229 | shouldBroadcastRequest = true; |
| 230 | } |
| 231 | arpRequests.put(target, new ArpRequest( |
| 232 | new HostArpRequester(this, arp, sw.getId(), pi.getInPort()), false)); |
| 233 | } |
| 234 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 235 | //Flood the request out edge ports |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 236 | if (shouldBroadcastRequest) { |
| 237 | broadcastArpRequestOutEdge(pi.getPacketData(), sw.getId(), pi.getInPort()); |
| 238 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 239 | } |
| 240 | else { |
| 241 | //We know the address, so send a reply |
| 242 | log.debug("Sending reply of {}", MACAddress.valueOf(mac).toString()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 243 | sendArpReply(arp, sw.getId(), pi.getInPort(), mac); |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | protected void handleArpReply(IOFSwitch sw, OFPacketIn pi, ARP arp){ |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 248 | log.debug("ARP reply recieved for {}, is {}, on {}/{}", new Object[] { |
| 249 | bytesToStringAddr(arp.getSenderProtocolAddress()), |
| 250 | HexString.toHexString(arp.getSenderHardwareAddress()), |
| 251 | HexString.toHexString(sw.getId()), pi.getInPort()}); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 252 | |
| 253 | updateArpTable(arp); |
| 254 | |
| 255 | //See if anyone's waiting for this ARP reply |
| 256 | InetAddress addr; |
| 257 | try { |
| 258 | addr = InetAddress.getByAddress(arp.getSenderProtocolAddress()); |
| 259 | } catch (UnknownHostException e) { |
| 260 | return; |
| 261 | } |
| 262 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 263 | Set<ArpRequest> requests = arpRequests.get(addr); |
| 264 | |
| 265 | //Synchronize on the Multimap while using an iterator for one of the sets |
| 266 | synchronized (arpRequests) { |
| 267 | Iterator<ArpRequest> it = requests.iterator(); |
| 268 | while (it.hasNext()) { |
| 269 | ArpRequest request = it.next(); |
| 270 | it.remove(); |
| 271 | request.dispatchReply(addr, arp.getSenderHardwareAddress()); |
| 272 | } |
| 273 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 274 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 275 | |
| 276 | private synchronized byte[] lookupArpTable(byte[] ipAddress){ |
| 277 | InetAddress addr; |
| 278 | try { |
| 279 | addr = InetAddress.getByAddress(ipAddress); |
| 280 | } catch (UnknownHostException e) { |
| 281 | log.warn("Unable to create InetAddress", e); |
| 282 | return null; |
| 283 | } |
| 284 | |
| 285 | ArpTableEntry arpEntry = arpTable.get(addr); |
| 286 | |
| 287 | if (arpEntry == null){ |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 288 | log.debug("MAC for {} unknown", bytesToStringAddr(ipAddress)); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 289 | return null; |
| 290 | } |
| 291 | |
| 292 | if (System.currentTimeMillis() - arpEntry.getTimeLastSeen() |
| 293 | > ARP_ENTRY_TIMEOUT){ |
| 294 | //Entry has timed out so we'll remove it and return null |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 295 | log.debug("Timing out old ARP entry for {}", bytesToStringAddr(ipAddress)); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 296 | arpTable.remove(addr); |
| 297 | return null; |
| 298 | } |
| 299 | |
| 300 | return arpEntry.getMacAddress(); |
| 301 | } |
| 302 | |
| 303 | private synchronized void updateArpTable(ARP arp){ |
| 304 | InetAddress addr; |
| 305 | try { |
| 306 | addr = InetAddress.getByAddress(arp.getSenderProtocolAddress()); |
| 307 | } catch (UnknownHostException e) { |
| 308 | log.warn("Unable to create InetAddress", e); |
| 309 | return; |
| 310 | } |
| 311 | |
| 312 | ArpTableEntry arpEntry = arpTable.get(addr); |
| 313 | |
| 314 | if (arpEntry != null |
| 315 | && arpEntry.getMacAddress() == arp.getSenderHardwareAddress()){ |
| 316 | arpEntry.setTimeLastSeen(System.currentTimeMillis()); |
| 317 | } |
| 318 | else { |
| 319 | arpTable.put(addr, |
| 320 | new ArpTableEntry(arp.getSenderHardwareAddress(), |
| 321 | System.currentTimeMillis())); |
| 322 | } |
| 323 | } |
| 324 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 325 | private void sendArpRequestForAddress(InetAddress ipAddress) { |
Jonathan Hart | 0ee0f02 | 2013-08-03 22:21:54 +1200 | [diff] [blame] | 326 | //TODO what should the sender IP address be? Probably not 0.0.0.0 |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 327 | byte[] zeroIpv4 = {0x0, 0x0, 0x0, 0x0}; |
| 328 | byte[] zeroMac = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 329 | byte[] bgpdMac = {0x0, 0x0, 0x0, 0x0, 0x0, 0x01}; |
| 330 | byte[] broadcastMac = {(byte)0xff, (byte)0xff, (byte)0xff, |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 331 | (byte)0xff, (byte)0xff, (byte)0xff}; |
| 332 | |
| 333 | ARP arpRequest = new ARP(); |
| 334 | |
| 335 | arpRequest.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| 336 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 337 | .setHardwareAddressLength((byte)Ethernet.DATALAYER_ADDRESS_LENGTH) |
| 338 | .setProtocolAddressLength((byte)4) //can't find the constant anywhere |
| 339 | .setOpCode(ARP.OP_REQUEST) |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 340 | .setSenderHardwareAddress(bgpdMac) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 341 | .setSenderProtocolAddress(zeroIpv4) |
| 342 | .setTargetHardwareAddress(zeroMac) |
| 343 | .setTargetProtocolAddress(ipAddress.getAddress()); |
| 344 | |
| 345 | Ethernet eth = new Ethernet(); |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 346 | //eth.setDestinationMACAddress(arpRequest.getSenderHardwareAddress()) |
| 347 | eth.setSourceMACAddress(bgpdMac) |
| 348 | .setDestinationMACAddress(broadcastMac) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 349 | .setEtherType(Ethernet.TYPE_ARP) |
| 350 | .setPayload(arpRequest); |
| 351 | |
| 352 | broadcastArpRequestOutEdge(eth.serialize(), 0, OFPort.OFPP_NONE.getValue()); |
| 353 | } |
| 354 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 355 | private void broadcastArpRequestOutEdge(byte[] arpRequest, long inSwitch, short inPort) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 356 | for (IOFSwitch sw : floodlightProvider.getSwitches().values()){ |
| 357 | Collection<Short> enabledPorts = sw.getEnabledPortNumbers(); |
| 358 | Set<Short> linkPorts = topology.getPortsWithLinks(sw.getId()); |
| 359 | |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 360 | if (linkPorts == null){ |
| 361 | //I think this means the switch isn't known to topology yet. |
| 362 | //Maybe it only just joined. |
| 363 | continue; |
| 364 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 365 | |
| 366 | OFPacketOut po = new OFPacketOut(); |
| 367 | po.setInPort(OFPort.OFPP_NONE) |
| 368 | .setBufferId(-1) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 369 | .setPacketData(arpRequest); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 370 | |
| 371 | List<OFAction> actions = new ArrayList<OFAction>(); |
| 372 | |
| 373 | for (short portNum : enabledPorts){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 374 | if (linkPorts.contains(portNum) || |
| 375 | (sw.getId() == inSwitch && portNum == inPort)){ |
| 376 | //If this port isn't an edge port or is the ingress port |
| 377 | //for the ARP, don't broadcast out it |
| 378 | continue; |
| 379 | } |
| 380 | |
| 381 | actions.add(new OFActionOutput(portNum)); |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 382 | //log.debug("Broadcasting out {}/{}", HexString.toHexString(sw.getId()), portNum); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | po.setActions(actions); |
| 386 | short actionsLength = (short) (actions.size() * OFActionOutput.MINIMUM_LENGTH); |
| 387 | po.setActionsLength(actionsLength); |
| 388 | po.setLengthU(OFPacketOut.MINIMUM_LENGTH + actionsLength |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 389 | + arpRequest.length); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 390 | |
| 391 | List<OFMessage> msgList = new ArrayList<OFMessage>(); |
| 392 | msgList.add(po); |
| 393 | |
| 394 | try { |
| 395 | sw.write(msgList, null); |
| 396 | sw.flush(); |
| 397 | } catch (IOException e) { |
| 398 | log.error("Failure writing packet out to switch", e); |
| 399 | } |
| 400 | } |
| 401 | } |
| 402 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 403 | public void sendArpReply(ARP arpRequest, long dpid, short port, byte[] targetMac) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 404 | ARP arpReply = new ARP(); |
| 405 | arpReply.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| 406 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 407 | .setHardwareAddressLength((byte)Ethernet.DATALAYER_ADDRESS_LENGTH) |
| 408 | .setProtocolAddressLength((byte)4) //can't find the constant anywhere |
| 409 | .setOpCode(ARP.OP_REPLY) |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 410 | .setSenderHardwareAddress(targetMac) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 411 | .setSenderProtocolAddress(arpRequest.getTargetProtocolAddress()) |
| 412 | .setTargetHardwareAddress(arpRequest.getSenderHardwareAddress()) |
| 413 | .setTargetProtocolAddress(arpRequest.getSenderProtocolAddress()); |
| 414 | |
| 415 | Ethernet eth = new Ethernet(); |
| 416 | eth.setDestinationMACAddress(arpRequest.getSenderHardwareAddress()) |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 417 | .setSourceMACAddress(targetMac) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 418 | .setEtherType(Ethernet.TYPE_ARP) |
| 419 | .setPayload(arpReply); |
| 420 | |
| 421 | List<OFAction> actions = new ArrayList<OFAction>(); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 422 | actions.add(new OFActionOutput(port)); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 423 | |
| 424 | OFPacketOut po = new OFPacketOut(); |
| 425 | po.setInPort(OFPort.OFPP_NONE) |
| 426 | .setBufferId(-1) |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 427 | .setPacketData(eth.serialize()) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 428 | .setActions(actions) |
| 429 | .setActionsLength((short)OFActionOutput.MINIMUM_LENGTH) |
| 430 | .setLengthU(OFPacketOut.MINIMUM_LENGTH + OFActionOutput.MINIMUM_LENGTH |
| 431 | + po.getPacketData().length); |
| 432 | |
| 433 | List<OFMessage> msgList = new ArrayList<OFMessage>(); |
| 434 | msgList.add(po); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 435 | |
| 436 | IOFSwitch sw = floodlightProvider.getSwitches().get(dpid); |
| 437 | |
| 438 | if (sw == null) { |
| 439 | return; |
| 440 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 441 | |
| 442 | try { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 443 | log.debug("Sending ARP reply to {}/{}", HexString.toHexString(sw.getId()), port); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 444 | sw.write(msgList, null); |
| 445 | sw.flush(); |
| 446 | } catch (IOException e) { |
| 447 | log.warn("Failure writing packet out to switch", e); |
| 448 | } |
| 449 | } |
Jonathan Hart | c824ad0 | 2013-07-03 15:58:45 +1200 | [diff] [blame] | 450 | |
| 451 | //TODO this should be put somewhere more central. I use it in BgpRoute as well. |
| 452 | //We need a HexString.toHexString() equivalent. |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 453 | private String bytesToStringAddr(byte[] bytes) { |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 454 | InetAddress addr; |
| 455 | try { |
| 456 | addr = InetAddress.getByAddress(bytes); |
| 457 | } catch (UnknownHostException e) { |
Jonathan Hart | c824ad0 | 2013-07-03 15:58:45 +1200 | [diff] [blame] | 458 | log.warn(" ", e); |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 459 | return ""; |
| 460 | } |
| 461 | if (addr == null) return ""; |
| 462 | else return addr.getHostAddress(); |
| 463 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 464 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 465 | @Override |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 466 | public byte[] getMacAddress(InetAddress ipAddress) { |
| 467 | return lookupArpTable(ipAddress.getAddress()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 468 | } |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 469 | |
| 470 | @Override |
| 471 | public void sendArpRequest(InetAddress ipAddress, IArpRequester requester, |
| 472 | boolean retry) { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 473 | arpRequests.put(ipAddress, new ArpRequest(requester, retry)); |
| 474 | //storeRequester(ipAddress, requester, retry); |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 475 | |
| 476 | sendArpRequestForAddress(ipAddress); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 477 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 478 | } |