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; |
| 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 | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 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 | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 25 | import net.onrc.onos.ofcontroller.bgproute.ILayer3InfoService; |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 26 | import net.onrc.onos.ofcontroller.bgproute.Interface; |
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 | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 39 | import com.google.common.collect.HashMultimap; |
| 40 | import com.google.common.collect.Multimaps; |
| 41 | import com.google.common.collect.SetMultimap; |
| 42 | |
Jonathan Hart | e751e1c | 2013-08-23 00:48:47 +1200 | [diff] [blame] | 43 | //TODO REST API to inspect ARP table |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 44 | public class ProxyArpManager implements IProxyArpService, IOFMessageListener { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 45 | private static Logger log = LoggerFactory.getLogger(ProxyArpManager.class); |
| 46 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 47 | private final long ARP_ENTRY_TIMEOUT = 600000; //ms (== 10 mins) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 48 | |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 49 | private final long ARP_TIMER_PERIOD = 60000; //ms (== 1 min) |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 50 | |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 51 | private IFloodlightProviderService floodlightProvider; |
| 52 | private ITopologyService topology; |
| 53 | private ILayer3InfoService layer3; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 54 | |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 55 | private Map<InetAddress, ArpTableEntry> arpTable; |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 56 | |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 57 | private SetMultimap<InetAddress, ArpRequest> arpRequests; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 58 | |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 59 | //public enum Mode {L2_MODE, L3_MODE} |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 60 | |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 61 | //private Mode mode; |
| 62 | //private IPatriciaTrie<Interface> interfacePtrie = null; |
| 63 | //private Collection<Interface> interfaces = null; |
| 64 | //private MACAddress routerMacAddress = null; |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 65 | //private SwitchPort bgpdAttachmentPoint = null; |
| 66 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 67 | private class ArpRequest { |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 68 | private IArpRequester requester; |
| 69 | private boolean retry; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 70 | private long requestTime; |
| 71 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 72 | public ArpRequest(IArpRequester requester, boolean retry){ |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 73 | this.requester = requester; |
| 74 | this.retry = retry; |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 75 | this.requestTime = System.currentTimeMillis(); |
| 76 | } |
| 77 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 78 | public ArpRequest(ArpRequest old) { |
| 79 | this.requester = old.requester; |
| 80 | this.retry = old.retry; |
| 81 | this.requestTime = System.currentTimeMillis(); |
| 82 | } |
| 83 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 84 | public boolean isExpired() { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 85 | return (System.currentTimeMillis() - requestTime) |
| 86 | > IProxyArpService.ARP_REQUEST_TIMEOUT; |
| 87 | } |
| 88 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 89 | public boolean shouldRetry() { |
| 90 | return retry; |
| 91 | } |
| 92 | |
Jonathan Hart | 32e1822 | 2013-08-07 22:05:42 +1200 | [diff] [blame] | 93 | public void dispatchReply(InetAddress ipAddress, byte[] replyMacAddress) { |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 94 | log.debug("Dispatching reply for {} to {}", ipAddress.getHostAddress(), |
| 95 | requester); |
| 96 | requester.arpResponse(ipAddress, replyMacAddress); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 97 | } |
| 98 | } |
| 99 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 100 | public ProxyArpManager(IFloodlightProviderService floodlightProvider, |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 101 | ITopologyService topology, ILayer3InfoService layer3){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 102 | this.floodlightProvider = floodlightProvider; |
| 103 | this.topology = topology; |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 104 | this.layer3 = layer3; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 105 | |
| 106 | arpTable = new HashMap<InetAddress, ArpTableEntry>(); |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 107 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 108 | arpRequests = Multimaps.synchronizedSetMultimap( |
| 109 | HashMultimap.<InetAddress, ArpRequest>create()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 110 | |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 111 | //mode = Mode.L2_MODE; |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 112 | } |
| 113 | |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 114 | /* |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 115 | public void setL3Mode(IPatriciaTrie<Interface> interfacePtrie, |
| 116 | Collection<Interface> interfaces, MACAddress routerMacAddress) { |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 117 | this.interfacePtrie = interfacePtrie; |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 118 | this.interfaces = interfaces; |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 119 | this.routerMacAddress = routerMacAddress; |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 120 | |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 121 | mode = Mode.L3_MODE; |
| 122 | } |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 123 | */ |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 124 | |
| 125 | public void startUp() { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 126 | Timer arpTimer = new Timer(); |
| 127 | arpTimer.scheduleAtFixedRate(new TimerTask() { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 128 | @Override |
| 129 | public void run() { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 130 | doPeriodicArpProcessing(); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 131 | } |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 132 | }, 0, ARP_TIMER_PERIOD); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 133 | } |
| 134 | |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 135 | /* |
| 136 | * Function that runs periodically to manage the asynchronous request mechanism. |
| 137 | * It basically cleans up old ARP requests if we don't get a response for them. |
| 138 | * The caller can designate that a request should be retried indefinitely, and |
| 139 | * this task will handle that as well. |
| 140 | */ |
| 141 | private void doPeriodicArpProcessing() { |
| 142 | SetMultimap<InetAddress, ArpRequest> retryList |
| 143 | = HashMultimap.<InetAddress, ArpRequest>create(); |
| 144 | |
| 145 | //Have to synchronize externally on the Multimap while using an iterator, |
| 146 | //even though it's a synchronizedMultimap |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 147 | synchronized (arpRequests) { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 148 | log.debug("Current have {} outstanding requests", |
| 149 | arpRequests.size()); |
| 150 | |
| 151 | Iterator<Map.Entry<InetAddress, ArpRequest>> it |
| 152 | = arpRequests.entries().iterator(); |
| 153 | |
| 154 | while (it.hasNext()) { |
| 155 | Map.Entry<InetAddress, ArpRequest> entry |
| 156 | = it.next(); |
| 157 | ArpRequest request = entry.getValue(); |
| 158 | if (request.isExpired()) { |
| 159 | log.debug("Cleaning expired ARP request for {}", |
| 160 | entry.getKey().getHostAddress()); |
| 161 | |
| 162 | it.remove(); |
| 163 | |
| 164 | if (request.shouldRetry()) { |
| 165 | retryList.put(entry.getKey(), request); |
| 166 | } |
| 167 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 168 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 169 | } |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 170 | |
| 171 | for (Map.Entry<InetAddress, Collection<ArpRequest>> entry |
| 172 | : retryList.asMap().entrySet()) { |
| 173 | |
| 174 | InetAddress address = entry.getKey(); |
| 175 | |
| 176 | log.debug("Resending ARP request for {}", address.getHostAddress()); |
| 177 | |
| 178 | sendArpRequestForAddress(address); |
| 179 | |
| 180 | for (ArpRequest request : entry.getValue()) { |
| 181 | arpRequests.put(address, new ArpRequest(request)); |
| 182 | } |
| 183 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 184 | } |
| 185 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 186 | @Override |
| 187 | public String getName() { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 188 | return "ProxyArpManager"; |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | @Override |
| 192 | public boolean isCallbackOrderingPrereq(OFType type, String name) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 193 | return false; |
| 194 | } |
| 195 | |
| 196 | @Override |
| 197 | public boolean isCallbackOrderingPostreq(OFType type, String name) { |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 198 | return false; |
| 199 | } |
| 200 | |
| 201 | @Override |
| 202 | public Command receive( |
| 203 | IOFSwitch sw, OFMessage msg, FloodlightContext cntx) { |
| 204 | |
| 205 | if (msg.getType() != OFType.PACKET_IN){ |
| 206 | return Command.CONTINUE; |
| 207 | } |
| 208 | |
| 209 | OFPacketIn pi = (OFPacketIn) msg; |
| 210 | |
| 211 | Ethernet eth = IFloodlightProviderService.bcStore.get(cntx, |
| 212 | IFloodlightProviderService.CONTEXT_PI_PAYLOAD); |
| 213 | |
| 214 | if (eth.getEtherType() == Ethernet.TYPE_ARP){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 215 | ARP arp = (ARP) eth.getPayload(); |
| 216 | |
| 217 | if (arp.getOpCode() == ARP.OP_REQUEST) { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 218 | handleArpRequest(sw, pi, arp); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 219 | } |
| 220 | else if (arp.getOpCode() == ARP.OP_REPLY) { |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 221 | handleArpReply(sw, pi, arp); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 222 | } |
| 223 | } |
| 224 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 225 | //TODO should we propagate ARP or swallow it? |
| 226 | //Always propagate for now so DeviceManager can learn the host location |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 227 | return Command.CONTINUE; |
| 228 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 229 | |
| 230 | protected void handleArpRequest(IOFSwitch sw, OFPacketIn pi, ARP arp) { |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 231 | if (log.isTraceEnabled()) { |
| 232 | log.trace("ARP request received for {}", |
| 233 | inetAddressToString(arp.getTargetProtocolAddress())); |
| 234 | } |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 235 | |
| 236 | InetAddress target; |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 237 | //InetAddress source; |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 238 | try { |
| 239 | target = InetAddress.getByAddress(arp.getTargetProtocolAddress()); |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 240 | //source = InetAddress.getByAddress(arp.getSenderProtocolAddress()); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 241 | } catch (UnknownHostException e) { |
| 242 | log.debug("Invalid address in ARP request", e); |
| 243 | return; |
| 244 | } |
| 245 | |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 246 | //if (mode == Mode.L3_MODE) { |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 247 | |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 248 | //if (originatedOutsideNetwork(source)) { |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 249 | //if (originatedOutsideNetwork(sw.getId(), pi.getInPort())) { |
| 250 | if (layer3.fromExternalNetwork(sw.getId(), pi.getInPort())) { |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 251 | //If the request came from outside our network, we only care if |
| 252 | //it was a request for one of our interfaces. |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 253 | //if (isInterfaceAddress(target)) { |
| 254 | if (layer3.isInterfaceAddress(target)) { |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 255 | log.trace("ARP request for our interface. Sending reply {} => {}", |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 256 | target.getHostAddress(), layer3.getRouterMacAddress().toString()); |
| 257 | sendArpReply(arp, sw.getId(), pi.getInPort(), layer3.getRouterMacAddress().toBytes()); |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 258 | } |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 259 | return; |
| 260 | } |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 261 | |
| 262 | /* |
| 263 | Interface intf = interfacePtrie.match(new Prefix(target.getAddress(), 32)); |
| 264 | //if (intf != null && target.equals(intf.getIpAddress())) { |
| 265 | if (intf != null) { |
| 266 | if (target.equals(intf.getIpAddress())) { |
| 267 | //ARP request for one of our interfaces, we can reply straight away |
| 268 | sendArpReply(arp, sw.getId(), pi.getInPort(), routerMacAddress.toBytes()); |
| 269 | } |
| 270 | // If we didn't enter the above if block, then we found a matching |
| 271 | // interface for the target IP but the request wasn't for us. |
| 272 | // This is someone else ARPing for a different host in the subnet. |
| 273 | // We shouldn't do anything in this case - if we let processing continue |
| 274 | // we'll end up erroneously re-broadcasting an ARP for someone else. |
| 275 | return; |
| 276 | } |
| 277 | */ |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 278 | //} |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 279 | |
| 280 | byte[] mac = lookupArpTable(arp.getTargetProtocolAddress()); |
| 281 | |
| 282 | if (mac == null){ |
| 283 | //Mac address is not in our arp table. |
| 284 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 285 | //Record where the request came from so we know where to send the reply |
Jonathan Hart | 9ea3121 | 2013-08-12 21:40:34 +1200 | [diff] [blame] | 286 | arpRequests.put(target, new ArpRequest( |
| 287 | new HostArpRequester(this, arp, sw.getId(), pi.getInPort()), false)); |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 288 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 289 | //Flood the request out edge ports |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 290 | //broadcastArpRequestOutEdge(pi.getPacketData(), sw.getId(), pi.getInPort()); |
| 291 | sendArpRequestToSwitches(target, pi.getPacketData(), sw.getId(), pi.getInPort()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 292 | } |
| 293 | else { |
| 294 | //We know the address, so send a reply |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 295 | if (log.isTraceEnabled()) { |
| 296 | log.trace("Sending reply: {} => {} to host at {}/{}", new Object [] { |
| 297 | inetAddressToString(arp.getTargetProtocolAddress()), |
| 298 | MACAddress.valueOf(mac).toString(), |
| 299 | HexString.toHexString(sw.getId()), pi.getInPort()}); |
| 300 | } |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 301 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 302 | sendArpReply(arp, sw.getId(), pi.getInPort(), mac); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | protected void handleArpReply(IOFSwitch sw, OFPacketIn pi, ARP arp){ |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 307 | if (log.isTraceEnabled()) { |
| 308 | log.trace("ARP reply recieved: {} => {}, on {}/{}", new Object[] { |
| 309 | inetAddressToString(arp.getSenderProtocolAddress()), |
| 310 | HexString.toHexString(arp.getSenderHardwareAddress()), |
| 311 | HexString.toHexString(sw.getId()), pi.getInPort()}); |
| 312 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 313 | |
| 314 | updateArpTable(arp); |
| 315 | |
| 316 | //See if anyone's waiting for this ARP reply |
| 317 | InetAddress addr; |
| 318 | try { |
| 319 | addr = InetAddress.getByAddress(arp.getSenderProtocolAddress()); |
| 320 | } catch (UnknownHostException e) { |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 321 | log.debug("Invalid address in ARP request", e); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 322 | return; |
| 323 | } |
| 324 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 325 | Set<ArpRequest> requests = arpRequests.get(addr); |
| 326 | |
| 327 | //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] | 328 | List<ArpRequest> requestsToSend = new ArrayList<ArpRequest>(requests.size()); |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 329 | synchronized (arpRequests) { |
| 330 | Iterator<ArpRequest> it = requests.iterator(); |
| 331 | while (it.hasNext()) { |
| 332 | ArpRequest request = it.next(); |
| 333 | it.remove(); |
Jonathan Hart | e751e1c | 2013-08-23 00:48:47 +1200 | [diff] [blame] | 334 | //request.dispatchReply(addr, arp.getSenderHardwareAddress()); |
| 335 | requestsToSend.add(request); |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 336 | } |
| 337 | } |
Jonathan Hart | e751e1c | 2013-08-23 00:48:47 +1200 | [diff] [blame] | 338 | |
| 339 | //Don't hold an ARP lock while dispatching requests |
| 340 | for (ArpRequest request : requestsToSend) { |
| 341 | request.dispatchReply(addr, arp.getSenderHardwareAddress()); |
| 342 | } |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 343 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 344 | |
| 345 | private synchronized byte[] lookupArpTable(byte[] ipAddress){ |
| 346 | InetAddress addr; |
| 347 | try { |
| 348 | addr = InetAddress.getByAddress(ipAddress); |
| 349 | } catch (UnknownHostException e) { |
| 350 | log.warn("Unable to create InetAddress", e); |
| 351 | return null; |
| 352 | } |
| 353 | |
| 354 | ArpTableEntry arpEntry = arpTable.get(addr); |
| 355 | |
| 356 | if (arpEntry == null){ |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 357 | //log.debug("MAC for {} unknown", bytesToStringAddr(ipAddress)); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 358 | return null; |
| 359 | } |
| 360 | |
| 361 | if (System.currentTimeMillis() - arpEntry.getTimeLastSeen() |
| 362 | > ARP_ENTRY_TIMEOUT){ |
| 363 | //Entry has timed out so we'll remove it and return null |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 364 | log.debug("Timing out old ARP entry for {}", inetAddressToString(ipAddress)); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 365 | arpTable.remove(addr); |
| 366 | return null; |
| 367 | } |
| 368 | |
| 369 | return arpEntry.getMacAddress(); |
| 370 | } |
| 371 | |
| 372 | private synchronized void updateArpTable(ARP arp){ |
| 373 | InetAddress addr; |
| 374 | try { |
| 375 | addr = InetAddress.getByAddress(arp.getSenderProtocolAddress()); |
| 376 | } catch (UnknownHostException e) { |
| 377 | log.warn("Unable to create InetAddress", e); |
| 378 | return; |
| 379 | } |
| 380 | |
| 381 | ArpTableEntry arpEntry = arpTable.get(addr); |
| 382 | |
| 383 | if (arpEntry != null |
| 384 | && arpEntry.getMacAddress() == arp.getSenderHardwareAddress()){ |
| 385 | arpEntry.setTimeLastSeen(System.currentTimeMillis()); |
| 386 | } |
| 387 | else { |
| 388 | arpTable.put(addr, |
| 389 | new ArpTableEntry(arp.getSenderHardwareAddress(), |
| 390 | System.currentTimeMillis())); |
| 391 | } |
| 392 | } |
| 393 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 394 | private void sendArpRequestForAddress(InetAddress ipAddress) { |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 395 | //TODO what should the sender IP address and MAC address be if no |
| 396 | //IP addresses are configured? Will there ever be a need to send |
| 397 | //ARP requests from the controller in that case? |
| 398 | //All-zero MAC address doesn't seem to work - hosts don't respond to it |
| 399 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 400 | byte[] zeroIpv4 = {0x0, 0x0, 0x0, 0x0}; |
| 401 | byte[] zeroMac = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 402 | byte[] genericNonZeroMac = {0x0, 0x0, 0x0, 0x0, 0x0, 0x01}; |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 403 | byte[] broadcastMac = {(byte)0xff, (byte)0xff, (byte)0xff, |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 404 | (byte)0xff, (byte)0xff, (byte)0xff}; |
| 405 | |
| 406 | ARP arpRequest = new ARP(); |
| 407 | |
| 408 | arpRequest.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| 409 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 410 | .setHardwareAddressLength((byte)Ethernet.DATALAYER_ADDRESS_LENGTH) |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 411 | .setProtocolAddressLength((byte)IPv4.ADDRESS_LENGTH) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 412 | .setOpCode(ARP.OP_REQUEST) |
Jonathan Hart | e97fa64 | 2013-08-21 13:37:38 +1200 | [diff] [blame] | 413 | //.setSenderHardwareAddress(bgpdMac) |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 414 | //.setSenderHardwareAddress(routerMacAddress.toBytes()) |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 415 | //.setSenderProtocolAddress(zeroIpv4) |
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 | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 419 | MACAddress routerMacAddress = layer3.getRouterMacAddress(); |
| 420 | byte[] senderMacAddress = null; |
| 421 | if (routerMacAddress != null) { |
| 422 | senderMacAddress = routerMacAddress.toBytes(); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 423 | } |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 424 | else { |
| 425 | //TODO hack for now as it's unclear what the MAC address should be |
| 426 | senderMacAddress = genericNonZeroMac; |
| 427 | } |
| 428 | arpRequest.setSenderHardwareAddress(senderMacAddress); |
| 429 | |
| 430 | byte[] senderIPAddress = zeroIpv4; |
| 431 | //if (mode == Mode.L3_MODE) { |
| 432 | //Interface intf = interfacePtrie.match(new Prefix(ipAddress.getAddress(), 32)); |
| 433 | Interface intf = layer3.getOutgoingInterface(ipAddress); |
| 434 | if (intf != null) { |
| 435 | senderIPAddress = intf.getIpAddress().getAddress(); |
| 436 | } |
| 437 | //} |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 438 | |
| 439 | arpRequest.setSenderProtocolAddress(senderIPAddress); |
| 440 | |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 441 | Ethernet eth = new Ethernet(); |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 442 | //eth.setSourceMACAddress(routerMacAddress.toBytes()) |
| 443 | eth.setSourceMACAddress(senderMacAddress) |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 444 | .setDestinationMACAddress(broadcastMac) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 445 | .setEtherType(Ethernet.TYPE_ARP) |
| 446 | .setPayload(arpRequest); |
| 447 | |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 448 | //broadcastArpRequestOutEdge(eth.serialize(), 0, OFPort.OFPP_NONE.getValue()); |
| 449 | sendArpRequestToSwitches(ipAddress, eth.serialize()); |
| 450 | } |
| 451 | |
| 452 | private void sendArpRequestToSwitches(InetAddress dstAddress, byte[] arpRequest) { |
| 453 | sendArpRequestToSwitches(dstAddress, arpRequest, 0, OFPort.OFPP_NONE.getValue()); |
| 454 | } |
| 455 | private void sendArpRequestToSwitches(InetAddress dstAddress, byte[] arpRequest, |
| 456 | long inSwitch, short inPort) { |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 457 | /* |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 458 | if (mode == Mode.L2_MODE) { |
Jonathan Hart | 64c0b20 | 2013-08-20 15:45:07 +1200 | [diff] [blame] | 459 | //log.debug("mode is l2"); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 460 | broadcastArpRequestOutEdge(arpRequest, inSwitch, inPort); |
| 461 | } |
| 462 | else if (mode == Mode.L3_MODE) { |
Jonathan Hart | 64c0b20 | 2013-08-20 15:45:07 +1200 | [diff] [blame] | 463 | //log.debug("mode is l3"); |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 464 | //TODO the case where it should be broadcast out all non-interface |
| 465 | //edge ports |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 466 | Interface intf = interfacePtrie.match(new Prefix(dstAddress.getAddress(), 32)); |
| 467 | if (intf != null) { |
| 468 | sendArpRequestOutPort(arpRequest, intf.getDpid(), intf.getPort()); |
| 469 | } |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 470 | else { |
| 471 | log.debug("No interface found to send ARP request for {}", |
| 472 | dstAddress.getHostAddress()); |
| 473 | } |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 474 | } |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 475 | */ |
| 476 | if (layer3.hasLayer3Configuration()) { |
| 477 | Interface intf = layer3.getOutgoingInterface(dstAddress); |
| 478 | if (intf != null) { |
| 479 | sendArpRequestOutPort(arpRequest, intf.getDpid(), intf.getPort()); |
| 480 | } |
| 481 | else { |
| 482 | //TODO here it should be broadcast out all non-interface edge ports. |
| 483 | //I think we can assume that if it's not a request for an external |
| 484 | //network, it's an ARP for a host in our own network. So we want to |
| 485 | //send it out all edge ports that don't have an interface configured |
| 486 | //to ensure it reaches all hosts in our network. |
| 487 | log.debug("No interface found to send ARP request for {}", |
| 488 | dstAddress.getHostAddress()); |
| 489 | } |
| 490 | } |
| 491 | else { |
| 492 | broadcastArpRequestOutEdge(arpRequest, inSwitch, inPort); |
| 493 | } |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [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){ |
| 502 | //I think this means the switch isn't known to topology yet. |
| 503 | //Maybe it only just joined. |
| 504 | continue; |
| 505 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 506 | |
| 507 | OFPacketOut po = new OFPacketOut(); |
| 508 | po.setInPort(OFPort.OFPP_NONE) |
| 509 | .setBufferId(-1) |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 510 | .setPacketData(arpRequest); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 511 | |
| 512 | List<OFAction> actions = new ArrayList<OFAction>(); |
| 513 | |
| 514 | for (short portNum : enabledPorts){ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 515 | if (linkPorts.contains(portNum) || |
| 516 | (sw.getId() == inSwitch && portNum == inPort)){ |
| 517 | //If this port isn't an edge port or is the ingress port |
| 518 | //for the ARP, don't broadcast out it |
| 519 | continue; |
| 520 | } |
| 521 | |
| 522 | actions.add(new OFActionOutput(portNum)); |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 523 | //log.debug("Broadcasting out {}/{}", HexString.toHexString(sw.getId()), portNum); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 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 | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 544 | private void sendArpRequestOutPort(byte[] arpRequest, long dpid, short port) { |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 545 | log.debug("Sending ARP request out {}/{}", HexString.toHexString(dpid), port); |
Jonathan Hart | 2f790d2 | 2013-08-15 14:01:24 +1200 | [diff] [blame] | 546 | |
| 547 | OFPacketOut po = new OFPacketOut(); |
| 548 | po.setInPort(OFPort.OFPP_NONE) |
| 549 | .setBufferId(-1) |
| 550 | .setPacketData(arpRequest); |
| 551 | |
| 552 | List<OFAction> actions = new ArrayList<OFAction>(); |
| 553 | actions.add(new OFActionOutput(port)); |
| 554 | po.setActions(actions); |
| 555 | short actionsLength = (short) (actions.size() * OFActionOutput.MINIMUM_LENGTH); |
| 556 | po.setActionsLength(actionsLength); |
| 557 | po.setLengthU(OFPacketOut.MINIMUM_LENGTH + actionsLength |
| 558 | + arpRequest.length); |
| 559 | |
| 560 | IOFSwitch sw = floodlightProvider.getSwitches().get(dpid); |
| 561 | |
| 562 | if (sw == null) { |
| 563 | log.debug("Switch not found when sending ARP request"); |
| 564 | return; |
| 565 | } |
| 566 | |
| 567 | try { |
| 568 | sw.write(po, null); |
| 569 | sw.flush(); |
| 570 | } catch (IOException e) { |
| 571 | log.error("Failure writing packet out to switch", e); |
| 572 | } |
| 573 | } |
| 574 | |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 575 | private String inetAddressToString(byte[] bytes) { |
| 576 | try { |
| 577 | return InetAddress.getByAddress(bytes).getHostAddress(); |
| 578 | } catch (UnknownHostException e) { |
| 579 | log.warn("Invalid IP address", e); |
| 580 | return ""; |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | /* |
| 585 | * IProxyArpService methods |
| 586 | */ |
| 587 | |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 588 | public void sendArpReply(ARP arpRequest, long dpid, short port, byte[] targetMac) { |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 589 | log.trace("Sending reply {} => {} to {}", new Object[] { |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 590 | inetAddressToString(arpRequest.getTargetProtocolAddress()), |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 591 | HexString.toHexString(targetMac), |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 592 | inetAddressToString(arpRequest.getSenderProtocolAddress())}); |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 593 | |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 594 | ARP arpReply = new ARP(); |
| 595 | arpReply.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| 596 | .setProtocolType(ARP.PROTO_TYPE_IP) |
| 597 | .setHardwareAddressLength((byte)Ethernet.DATALAYER_ADDRESS_LENGTH) |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 598 | .setProtocolAddressLength((byte)IPv4.ADDRESS_LENGTH) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 599 | .setOpCode(ARP.OP_REPLY) |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 600 | .setSenderHardwareAddress(targetMac) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 601 | .setSenderProtocolAddress(arpRequest.getTargetProtocolAddress()) |
| 602 | .setTargetHardwareAddress(arpRequest.getSenderHardwareAddress()) |
| 603 | .setTargetProtocolAddress(arpRequest.getSenderProtocolAddress()); |
| 604 | |
| 605 | Ethernet eth = new Ethernet(); |
| 606 | eth.setDestinationMACAddress(arpRequest.getSenderHardwareAddress()) |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 607 | .setSourceMACAddress(targetMac) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 608 | .setEtherType(Ethernet.TYPE_ARP) |
| 609 | .setPayload(arpReply); |
| 610 | |
| 611 | List<OFAction> actions = new ArrayList<OFAction>(); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 612 | actions.add(new OFActionOutput(port)); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 613 | |
| 614 | OFPacketOut po = new OFPacketOut(); |
| 615 | po.setInPort(OFPort.OFPP_NONE) |
| 616 | .setBufferId(-1) |
Jonathan Hart | 8ec133c | 2013-06-26 15:25:18 +1200 | [diff] [blame] | 617 | .setPacketData(eth.serialize()) |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 618 | .setActions(actions) |
| 619 | .setActionsLength((short)OFActionOutput.MINIMUM_LENGTH) |
| 620 | .setLengthU(OFPacketOut.MINIMUM_LENGTH + OFActionOutput.MINIMUM_LENGTH |
| 621 | + po.getPacketData().length); |
| 622 | |
| 623 | List<OFMessage> msgList = new ArrayList<OFMessage>(); |
| 624 | msgList.add(po); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 625 | |
| 626 | IOFSwitch sw = floodlightProvider.getSwitches().get(dpid); |
| 627 | |
| 628 | if (sw == null) { |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 629 | log.error("Switch {} not found when sending ARP reply", |
| 630 | HexString.toHexString(dpid)); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 631 | return; |
| 632 | } |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 633 | |
| 634 | try { |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 635 | log.debug("Sending ARP reply to {}/{}", HexString.toHexString(sw.getId()), port); |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 636 | sw.write(msgList, null); |
| 637 | sw.flush(); |
| 638 | } catch (IOException e) { |
| 639 | log.warn("Failure writing packet out to switch", e); |
| 640 | } |
| 641 | } |
Jonathan Hart | c824ad0 | 2013-07-03 15:58:45 +1200 | [diff] [blame] | 642 | |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 643 | @Override |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 644 | public byte[] getMacAddress(InetAddress ipAddress) { |
| 645 | return lookupArpTable(ipAddress.getAddress()); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 646 | } |
Jonathan Hart | 4dfc365 | 2013-08-02 20:22:36 +1200 | [diff] [blame] | 647 | |
| 648 | @Override |
| 649 | public void sendArpRequest(InetAddress ipAddress, IArpRequester requester, |
| 650 | boolean retry) { |
Jonathan Hart | df6ec33 | 2013-08-04 01:37:14 +1200 | [diff] [blame] | 651 | arpRequests.put(ipAddress, new ArpRequest(requester, retry)); |
Jonathan Hart | f0c0dcb | 2013-07-24 15:28:42 +1200 | [diff] [blame] | 652 | |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 653 | //Sanity check to make sure we don't send a request for our own address |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 654 | //if (!isInterfaceAddress(ipAddress)) { |
| 655 | if (!layer3.isInterfaceAddress(ipAddress)) { |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 656 | sendArpRequestForAddress(ipAddress); |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | /* |
| 661 | * TODO These methods might be more suited to some kind of L3 information service |
| 662 | * that ProxyArpManager could query, rather than having the information |
| 663 | * embedded in ProxyArpManager. There may be many modules that need L3 information. |
| 664 | */ |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 665 | /* |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 666 | private boolean originatedOutsideNetwork(InetAddress source) { |
| 667 | Interface intf = interfacePtrie.match(new Prefix(source.getAddress(), 32)); |
| 668 | if (intf != null) { |
| 669 | if (intf.getIpAddress().equals(source)) { |
| 670 | // This request must have been originated by us (the controller) |
| 671 | return false; |
| 672 | } |
| 673 | else { |
| 674 | // Source was in one of our interface subnets, but wasn't us. |
| 675 | // It must be external. |
| 676 | return true; |
| 677 | } |
| 678 | } |
| 679 | else { |
| 680 | // Source is not in one of our interface subnets. It's probably a host |
| 681 | // in our network as we should only receive ARPs broadcast by external |
| 682 | // hosts if they're in the same subnet. |
| 683 | return false; |
| 684 | } |
| 685 | } |
| 686 | |
Jonathan Hart | 1633a40 | 2013-08-24 11:38:56 +1200 | [diff] [blame] | 687 | private boolean originatedOutsideNetwork(long inDpid, short inPort) { |
| 688 | for (Interface intf : interfaces) { |
| 689 | if (intf.getDpid() == inDpid && intf.getPort() == inPort) { |
| 690 | return true; |
| 691 | } |
| 692 | } |
| 693 | return false; |
| 694 | } |
| 695 | |
Jonathan Hart | 6e61821 | 2013-08-21 22:28:43 +1200 | [diff] [blame] | 696 | private boolean isInterfaceAddress(InetAddress address) { |
| 697 | Interface intf = interfacePtrie.match(new Prefix(address.getAddress(), 32)); |
| 698 | return (intf != null && intf.getIpAddress().equals(address)); |
| 699 | } |
| 700 | |
| 701 | private boolean inInterfaceSubnet(InetAddress address) { |
| 702 | Interface intf = interfacePtrie.match(new Prefix(address.getAddress(), 32)); |
| 703 | return (intf != null && !intf.getIpAddress().equals(address)); |
Jonathan Hart | 6261dcd | 2013-07-22 17:58:35 +1200 | [diff] [blame] | 704 | } |
Jonathan Hart | 08ee852 | 2013-09-22 17:34:43 +1200 | [diff] [blame^] | 705 | */ |
Jonathan Hart | c7ca35d | 2013-06-25 20:54:25 +1200 | [diff] [blame] | 706 | } |