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