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.HashSet; |
| 10 | import java.util.Iterator; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 11 | import java.util.List; |
| 12 | import java.util.Map; |
| 13 | import java.util.Set; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 14 | import java.util.Timer; |
| 15 | import java.util.TimerTask; |
| 16 | import java.util.concurrent.ConcurrentHashMap; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 17 | |
| 18 | import net.floodlightcontroller.core.FloodlightContext; |
| 19 | import net.floodlightcontroller.core.IFloodlightProviderService; |
| 20 | import net.floodlightcontroller.core.IOFMessageListener; |
| 21 | import net.floodlightcontroller.core.IOFSwitch; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 22 | import net.floodlightcontroller.devicemanager.IDeviceService; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 23 | import net.floodlightcontroller.packet.ARP; |
| 24 | import net.floodlightcontroller.packet.Ethernet; |
| 25 | import net.floodlightcontroller.topology.ITopologyService; |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 26 | import net.floodlightcontroller.util.MACAddress; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 27 | |
| 28 | import org.openflow.protocol.OFMessage; |
| 29 | import org.openflow.protocol.OFPacketIn; |
| 30 | import org.openflow.protocol.OFPacketOut; |
| 31 | import org.openflow.protocol.OFPort; |
| 32 | import org.openflow.protocol.OFType; |
| 33 | import org.openflow.protocol.action.OFAction; |
| 34 | import org.openflow.protocol.action.OFActionOutput; |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 35 | import org.openflow.util.HexString; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 36 | import org.slf4j.Logger; |
| 37 | import org.slf4j.LoggerFactory; |
| 38 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 39 | public class ProxyArpManager implements IProxyArpService, IOFMessageListener { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 40 | private static Logger log = LoggerFactory.getLogger(ProxyArpManager.class); |
| 41 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 42 | private final long ARP_ENTRY_TIMEOUT = 600000; //ms (== 10 mins) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 43 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 44 | private final long ARP_REQUEST_TIMEOUT_THREAD_PERIOD = 60000; //ms (== 1 min) |
| 45 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 46 | protected IFloodlightProviderService floodlightProvider; |
| 47 | protected ITopologyService topology; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 48 | protected IDeviceService devices; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 49 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 50 | protected Map<InetAddress, ArpTableEntry> arpTable; |
| 51 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 52 | //protected ConcurrentHashMap<InetAddress, Set<ArpRequest>> arpRequests; |
| 53 | protected ConcurrentHashMap<InetAddress, ArpRequest> arpRequests; |
| 54 | |
| 55 | private class ArpRequest { |
| 56 | private Set<IArpRequester> requesters; |
| 57 | private long requestTime; |
| 58 | |
| 59 | public ArpRequest(){ |
| 60 | this.requesters = new HashSet<IArpRequester>(); |
| 61 | this.requestTime = System.currentTimeMillis(); |
| 62 | } |
| 63 | |
| 64 | public synchronized void addRequester(IArpRequester requester){ |
| 65 | requestTime = System.currentTimeMillis(); |
| 66 | requesters.add(requester); |
| 67 | } |
| 68 | |
| 69 | public boolean isExpired(){ |
| 70 | return (System.currentTimeMillis() - requestTime) |
| 71 | > IProxyArpService.ARP_REQUEST_TIMEOUT; |
| 72 | } |
| 73 | |
| 74 | public synchronized void dispatchReply(byte[] replyMacAddress){ |
| 75 | for (IArpRequester requester : requesters){ |
| 76 | requester.arpResponse(replyMacAddress); |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 81 | public ProxyArpManager(IFloodlightProviderService floodlightProvider, |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 82 | ITopologyService topology, IDeviceService devices){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 83 | this.floodlightProvider = floodlightProvider; |
| 84 | this.topology = topology; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 85 | this.devices = devices; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 86 | |
| 87 | arpTable = new HashMap<InetAddress, ArpTableEntry>(); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 88 | //arpRequests = new ConcurrentHashMap<InetAddress, Set<ArpRequest>>(); |
| 89 | arpRequests = new ConcurrentHashMap<InetAddress, ArpRequest>(); |
| 90 | |
| 91 | Timer arpRequestTimeoutTimer = new Timer(); |
| 92 | arpRequestTimeoutTimer.scheduleAtFixedRate(new TimerTask() { |
| 93 | @Override |
| 94 | public void run() { |
| 95 | synchronized (arpRequests) { |
| 96 | log.debug("Current have {} outstanding requests", |
| 97 | arpRequests.size()); |
| 98 | |
| 99 | Iterator<Map.Entry<InetAddress, ArpRequest>> it |
| 100 | = arpRequests.entrySet().iterator(); |
| 101 | |
| 102 | while (it.hasNext()){ |
| 103 | Map.Entry<InetAddress, ArpRequest> entry |
| 104 | = it.next(); |
| 105 | |
| 106 | if (entry.getValue().isExpired()){ |
| 107 | log.debug("Cleaning expired ARP request for {}", |
| 108 | entry.getKey().getHostAddress()); |
| 109 | it.remove(); |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | }, 0, ARP_REQUEST_TIMEOUT_THREAD_PERIOD); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 115 | } |
| 116 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame^] | 117 | private void storeRequester(InetAddress address, IArpRequester requester) { |
| 118 | synchronized (arpRequests) { |
| 119 | if (arpRequests.get(address) == null) { |
| 120 | arpRequests.put(address, new ArpRequest()); |
| 121 | } |
| 122 | ArpRequest request = arpRequests.get(address); |
| 123 | |
| 124 | request.addRequester(requester); |
| 125 | } |
| 126 | } |
| 127 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 128 | @Override |
| 129 | public String getName() { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 130 | return "ProxyArpManager"; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | @Override |
| 134 | public boolean isCallbackOrderingPrereq(OFType type, String name) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 135 | return false; |
| 136 | } |
| 137 | |
| 138 | @Override |
| 139 | public boolean isCallbackOrderingPostreq(OFType type, String name) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 140 | return false; |
| 141 | } |
| 142 | |
| 143 | @Override |
| 144 | public Command receive( |
| 145 | IOFSwitch sw, OFMessage msg, FloodlightContext cntx) { |
| 146 | |
| 147 | if (msg.getType() != OFType.PACKET_IN){ |
| 148 | return Command.CONTINUE; |
| 149 | } |
| 150 | |
| 151 | OFPacketIn pi = (OFPacketIn) msg; |
| 152 | |
| 153 | Ethernet eth = IFloodlightProviderService.bcStore.get(cntx, |
| 154 | IFloodlightProviderService.CONTEXT_PI_PAYLOAD); |
| 155 | |
| 156 | if (eth.getEtherType() == Ethernet.TYPE_ARP){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 157 | ARP arp = (ARP) eth.getPayload(); |
| 158 | |
| 159 | if (arp.getOpCode() == ARP.OP_REQUEST) { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 160 | handleArpRequest(sw, pi, arp); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 161 | } |
| 162 | else if (arp.getOpCode() == ARP.OP_REPLY) { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 163 | handleArpReply(sw, pi, arp); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 164 | } |
| 165 | } |
| 166 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 167 | //TODO should we propagate ARP or swallow it? |
| 168 | //Always propagate for now so DeviceManager can learn the host location |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 169 | return Command.CONTINUE; |
| 170 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 171 | |
| 172 | protected void handleArpRequest(IOFSwitch sw, OFPacketIn pi, ARP arp) { |
| 173 | log.debug("ARP request received for {}", |
| 174 | bytesToStringAddr(arp.getTargetProtocolAddress())); |
| 175 | |
| 176 | byte[] mac = lookupArpTable(arp.getTargetProtocolAddress()); |
| 177 | |
| 178 | if (mac == null){ |
| 179 | //Mac address is not in our arp table. |
| 180 | |
| 181 | //TODO check what the DeviceManager thinks |
| 182 | |
| 183 | //Record where the request came from so we know where to send the reply |
| 184 | InetAddress target; |
| 185 | try { |
| 186 | target = InetAddress.getByAddress(arp.getTargetProtocolAddress()); |
| 187 | } catch (UnknownHostException e) { |
| 188 | log.debug("Invalid address in ARP request", e); |
| 189 | //return Command.CONTINUE; //Continue or stop? |
| 190 | return; |
| 191 | } |
| 192 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame^] | 193 | storeRequester(target, new HostArpRequester(this, arp, sw.getId(), |
| 194 | pi.getInPort())); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 195 | |
| 196 | //Flood the request out edge ports |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame^] | 197 | broadcastArpRequestOutEdge(pi.getPacketData(), sw.getId(), pi.getInPort()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 198 | } |
| 199 | else { |
| 200 | //We know the address, so send a reply |
| 201 | log.debug("Sending reply of {}", MACAddress.valueOf(mac).toString()); |
| 202 | //sendArpReply(arp, pi, mac, sw); |
| 203 | sendArpReply(arp, sw.getId(), pi.getInPort(), mac); |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | protected void handleArpReply(IOFSwitch sw, OFPacketIn pi, ARP arp){ |
| 208 | log.debug("ARP reply recieved for {}", |
| 209 | bytesToStringAddr(arp.getSenderProtocolAddress())); |
| 210 | |
| 211 | updateArpTable(arp); |
| 212 | |
| 213 | //See if anyone's waiting for this ARP reply |
| 214 | InetAddress addr; |
| 215 | try { |
| 216 | addr = InetAddress.getByAddress(arp.getSenderProtocolAddress()); |
| 217 | } catch (UnknownHostException e) { |
| 218 | return; |
| 219 | } |
| 220 | |
| 221 | ArpRequest request = null; |
| 222 | synchronized (arpRequests) { |
| 223 | request = arpRequests.get(addr); |
| 224 | if (request != null) { |
| 225 | arpRequests.remove(addr); |
| 226 | } |
| 227 | } |
| 228 | if (request != null && !request.isExpired()) { |
| 229 | request.dispatchReply(arp.getSenderHardwareAddress()); |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | Set<ArpRequest> requests = arpRequests.get(addr); |
| 234 | if (requests != null){ |
| 235 | |
| 236 | synchronized (requests) { |
| 237 | for (ArpRequest request : requests) { |
| 238 | if (!request.isExpired()){ |
| 239 | request.getRequester().arpResponse( |
| 240 | arp.getSenderHardwareAddress()); |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | }*/ |
| 245 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 246 | |
| 247 | private synchronized byte[] lookupArpTable(byte[] ipAddress){ |
| 248 | InetAddress addr; |
| 249 | try { |
| 250 | addr = InetAddress.getByAddress(ipAddress); |
| 251 | } catch (UnknownHostException e) { |
| 252 | log.warn("Unable to create InetAddress", e); |
| 253 | return null; |
| 254 | } |
| 255 | |
| 256 | ArpTableEntry arpEntry = arpTable.get(addr); |
| 257 | |
| 258 | if (arpEntry == null){ |
| 259 | return null; |
| 260 | } |
| 261 | |
| 262 | if (System.currentTimeMillis() - arpEntry.getTimeLastSeen() |
| 263 | > ARP_ENTRY_TIMEOUT){ |
| 264 | //Entry has timed out so we'll remove it and return null |
| 265 | arpTable.remove(addr); |
| 266 | return null; |
| 267 | } |
| 268 | |
| 269 | return arpEntry.getMacAddress(); |
| 270 | } |
| 271 | |
| 272 | private synchronized void updateArpTable(ARP arp){ |
| 273 | InetAddress addr; |
| 274 | try { |
| 275 | addr = InetAddress.getByAddress(arp.getSenderProtocolAddress()); |
| 276 | } catch (UnknownHostException e) { |
| 277 | log.warn("Unable to create InetAddress", e); |
| 278 | return; |
| 279 | } |
| 280 | |
| 281 | ArpTableEntry arpEntry = arpTable.get(addr); |
| 282 | |
| 283 | if (arpEntry != null |
| 284 | && arpEntry.getMacAddress() == arp.getSenderHardwareAddress()){ |
| 285 | arpEntry.setTimeLastSeen(System.currentTimeMillis()); |
| 286 | } |
| 287 | else { |
| 288 | arpTable.put(addr, |
| 289 | new ArpTableEntry(arp.getSenderHardwareAddress(), |
| 290 | System.currentTimeMillis())); |
| 291 | } |
| 292 | } |
| 293 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame^] | 294 | private void sendArpRequestForAddress(InetAddress ipAddress) { |
| 295 | byte[] zeroIpv4 = {0x0, 0x0, 0x0, 0x0}; |
| 296 | byte[] zeroMac = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
| 297 | byte[] broadcastMac = {(byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff, |
| 298 | (byte)0xff, (byte)0xff, (byte)0xff}; |
| 299 | |
| 300 | ARP arpRequest = new ARP(); |
| 301 | |
| 302 | arpRequest.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| 303 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 304 | .setHardwareAddressLength((byte)Ethernet.DATALAYER_ADDRESS_LENGTH) |
| 305 | .setProtocolAddressLength((byte)4) //can't find the constant anywhere |
| 306 | .setOpCode(ARP.OP_REQUEST) |
| 307 | .setSenderHardwareAddress(zeroMac) |
| 308 | .setSenderProtocolAddress(zeroIpv4) |
| 309 | .setTargetHardwareAddress(zeroMac) |
| 310 | .setTargetProtocolAddress(ipAddress.getAddress()); |
| 311 | |
| 312 | Ethernet eth = new Ethernet(); |
| 313 | eth.setDestinationMACAddress(arpRequest.getSenderHardwareAddress()) |
| 314 | .setSourceMACAddress(broadcastMac) |
| 315 | .setEtherType(Ethernet.TYPE_ARP) |
| 316 | .setPayload(arpRequest); |
| 317 | |
| 318 | broadcastArpRequestOutEdge(eth.serialize(), 0, OFPort.OFPP_NONE.getValue()); |
| 319 | } |
| 320 | |
| 321 | //private void broadcastArpRequestOutEdge(OFPacketIn pi, long inSwitch, short inPort){ |
| 322 | private void broadcastArpRequestOutEdge(byte[] arpRequest, long inSwitch, short inPort) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 323 | for (IOFSwitch sw : floodlightProvider.getSwitches().values()){ |
| 324 | Collection<Short> enabledPorts = sw.getEnabledPortNumbers(); |
| 325 | Set<Short> linkPorts = topology.getPortsWithLinks(sw.getId()); |
| 326 | |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 327 | if (linkPorts == null){ |
| 328 | //I think this means the switch isn't known to topology yet. |
| 329 | //Maybe it only just joined. |
| 330 | continue; |
| 331 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 332 | |
| 333 | OFPacketOut po = new OFPacketOut(); |
| 334 | po.setInPort(OFPort.OFPP_NONE) |
| 335 | .setBufferId(-1) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame^] | 336 | .setPacketData(arpRequest); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 337 | |
| 338 | List<OFAction> actions = new ArrayList<OFAction>(); |
| 339 | |
| 340 | for (short portNum : enabledPorts){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 341 | if (linkPorts.contains(portNum) || |
| 342 | (sw.getId() == inSwitch && portNum == inPort)){ |
| 343 | //If this port isn't an edge port or is the ingress port |
| 344 | //for the ARP, don't broadcast out it |
| 345 | continue; |
| 346 | } |
| 347 | |
| 348 | actions.add(new OFActionOutput(portNum)); |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 349 | log.debug("Broadcasting out {}/{}", HexString.toHexString(sw.getId()), portNum); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | po.setActions(actions); |
| 353 | short actionsLength = (short) (actions.size() * OFActionOutput.MINIMUM_LENGTH); |
| 354 | po.setActionsLength(actionsLength); |
| 355 | po.setLengthU(OFPacketOut.MINIMUM_LENGTH + actionsLength |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame^] | 356 | + arpRequest.length); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 357 | |
| 358 | List<OFMessage> msgList = new ArrayList<OFMessage>(); |
| 359 | msgList.add(po); |
| 360 | |
| 361 | try { |
| 362 | sw.write(msgList, null); |
| 363 | sw.flush(); |
| 364 | } catch (IOException e) { |
| 365 | log.error("Failure writing packet out to switch", e); |
| 366 | } |
| 367 | } |
| 368 | } |
| 369 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 370 | public void sendArpReply(ARP arpRequest, long dpid, short port, byte[] targetMac) { |
| 371 | //private void sendArpReply(ARP arpRequest, OFPacketIn pi, byte[] macRequested, IOFSwitch sw){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 372 | ARP arpReply = new ARP(); |
| 373 | arpReply.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| 374 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 375 | .setHardwareAddressLength((byte)Ethernet.DATALAYER_ADDRESS_LENGTH) |
| 376 | .setProtocolAddressLength((byte)4) //can't find the constant anywhere |
| 377 | .setOpCode(ARP.OP_REPLY) |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 378 | //.setSenderHardwareAddress(macRequested) |
| 379 | .setSenderHardwareAddress(targetMac) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 380 | .setSenderProtocolAddress(arpRequest.getTargetProtocolAddress()) |
| 381 | .setTargetHardwareAddress(arpRequest.getSenderHardwareAddress()) |
| 382 | .setTargetProtocolAddress(arpRequest.getSenderProtocolAddress()); |
| 383 | |
| 384 | Ethernet eth = new Ethernet(); |
| 385 | eth.setDestinationMACAddress(arpRequest.getSenderHardwareAddress()) |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 386 | //.setSourceMACAddress(macRequested) |
| 387 | .setSourceMACAddress(targetMac) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 388 | .setEtherType(Ethernet.TYPE_ARP) |
| 389 | .setPayload(arpReply); |
| 390 | |
| 391 | List<OFAction> actions = new ArrayList<OFAction>(); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 392 | //actions.add(new OFActionOutput(pi.getInPort())); |
| 393 | actions.add(new OFActionOutput(port)); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 394 | |
| 395 | OFPacketOut po = new OFPacketOut(); |
| 396 | po.setInPort(OFPort.OFPP_NONE) |
| 397 | .setBufferId(-1) |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 398 | .setPacketData(eth.serialize()) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 399 | .setActions(actions) |
| 400 | .setActionsLength((short)OFActionOutput.MINIMUM_LENGTH) |
| 401 | .setLengthU(OFPacketOut.MINIMUM_LENGTH + OFActionOutput.MINIMUM_LENGTH |
| 402 | + po.getPacketData().length); |
| 403 | |
| 404 | List<OFMessage> msgList = new ArrayList<OFMessage>(); |
| 405 | msgList.add(po); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 406 | |
| 407 | IOFSwitch sw = floodlightProvider.getSwitches().get(dpid); |
| 408 | |
| 409 | if (sw == null) { |
| 410 | return; |
| 411 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 412 | |
| 413 | try { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 414 | log.debug("Sending ARP reply to {}/{}", HexString.toHexString(sw.getId()), port); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 415 | sw.write(msgList, null); |
| 416 | sw.flush(); |
| 417 | } catch (IOException e) { |
| 418 | log.warn("Failure writing packet out to switch", e); |
| 419 | } |
| 420 | } |
Jonathan Hart | c824ad0 | 2013-07-03 15:58:45 +1200 | [diff] [blame] | 421 | |
| 422 | //TODO this should be put somewhere more central. I use it in BgpRoute as well. |
| 423 | //We need a HexString.toHexString() equivalent. |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame^] | 424 | private String bytesToStringAddr(byte[] bytes) { |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 425 | InetAddress addr; |
| 426 | try { |
| 427 | addr = InetAddress.getByAddress(bytes); |
| 428 | } catch (UnknownHostException e) { |
Jonathan Hart | c824ad0 | 2013-07-03 15:58:45 +1200 | [diff] [blame] | 429 | log.warn(" ", e); |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 430 | return ""; |
| 431 | } |
| 432 | if (addr == null) return ""; |
| 433 | else return addr.getHostAddress(); |
| 434 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 435 | |
| 436 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame^] | 437 | public byte[] getMacAddress(InetAddress ipAddress) { |
| 438 | return lookupArpTable(ipAddress.getAddress()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 439 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame^] | 440 | |
| 441 | public byte[] sendArpRequest(InetAddress ipAddress, IArpRequester requester) { |
| 442 | byte[] lookupMac; |
| 443 | if ((lookupMac = lookupArpTable(ipAddress.getAddress())) == null) { |
| 444 | return lookupMac; |
| 445 | } |
| 446 | |
| 447 | sendArpRequestForAddress(ipAddress); |
| 448 | |
| 449 | storeRequester(ipAddress, requester); |
| 450 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 451 | return null; |
| 452 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 453 | } |