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