| package net.onrc.onos.apps.proxyarp; |
| |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.Timer; |
| import java.util.TimerTask; |
| |
| import net.floodlightcontroller.core.module.FloodlightModuleContext; |
| import net.floodlightcontroller.core.module.IFloodlightModule; |
| import net.floodlightcontroller.core.module.IFloodlightService; |
| import net.floodlightcontroller.restserver.IRestApiService; |
| import net.floodlightcontroller.util.MACAddress; |
| import net.onrc.onos.api.packet.IPacketListener; |
| import net.onrc.onos.api.packet.IPacketService; |
| import net.onrc.onos.apps.proxyarp.web.ArpWebRoutable; |
| import net.onrc.onos.apps.sdnip.Interface; |
| import net.onrc.onos.core.datagrid.IDatagridService; |
| import net.onrc.onos.core.datagrid.IEventChannel; |
| import net.onrc.onos.core.datagrid.IEventChannelListener; |
| import net.onrc.onos.core.main.config.IConfigInfoService; |
| import net.onrc.onos.core.packet.ARP; |
| import net.onrc.onos.core.packet.Ethernet; |
| import net.onrc.onos.core.packet.IPv4; |
| import net.onrc.onos.core.topology.Host; |
| import net.onrc.onos.core.topology.ITopologyService; |
| import net.onrc.onos.core.topology.Port; |
| import net.onrc.onos.core.topology.Switch; |
| import net.onrc.onos.core.topology.MutableTopology; |
| import net.onrc.onos.core.util.Dpid; |
| import net.onrc.onos.core.util.PortNumber; |
| import net.onrc.onos.core.util.SwitchPort; |
| |
| import org.projectfloodlight.openflow.util.HexString; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.collect.HashMultimap; |
| import com.google.common.collect.Multimaps; |
| import com.google.common.collect.SetMultimap; |
| import com.google.common.net.InetAddresses; |
| |
| public class ProxyArpManager implements IProxyArpService, IFloodlightModule, |
| IPacketListener { |
| private static final Logger log = LoggerFactory |
| .getLogger(ProxyArpManager.class); |
| |
| private static long arpTimerPeriodConfig = 2000; // ms |
| private static int arpRequestTimeoutConfig = 2000; // ms |
| private long arpCleaningTimerPeriodConfig = 60 * 1000; // ms (1 min) |
| |
| private IDatagridService datagrid; |
| private IEventChannel<Long, ArpReplyNotification> arpReplyEventChannel; |
| private IEventChannel<String, ArpCacheNotification> arpCacheEventChannel; |
| private static final String ARP_REPLY_CHANNEL_NAME = "onos.arp_reply"; |
| private static final String ARP_CACHE_CHANNEL_NAME = "onos.arp_cache"; |
| private final ArpReplyEventHandler arpReplyEventHandler = new ArpReplyEventHandler(); |
| private final ArpCacheEventHandler arpCacheEventHandler = new ArpCacheEventHandler(); |
| |
| private IConfigInfoService configService; |
| private IRestApiService restApi; |
| |
| private ITopologyService topologyService; |
| private MutableTopology mutableTopology; |
| private IPacketService packetService; |
| |
| private short vlan; |
| private static final short NO_VLAN = 0; |
| |
| private SetMultimap<InetAddress, ArpRequest> arpRequests; |
| |
| private ArpCache arpCache; |
| |
| private class ArpReplyEventHandler implements |
| IEventChannelListener<Long, ArpReplyNotification> { |
| |
| @Override |
| public void entryAdded(ArpReplyNotification arpReply) { |
| log.debug("Received ARP reply notification for ip {}, mac {}", |
| arpReply.getTargetAddress(), arpReply.getTargetMacAddress()); |
| |
| InetAddress addr = InetAddresses.fromInteger(arpReply.getTargetAddress()); |
| |
| sendArpReplyToWaitingRequesters(addr, |
| arpReply.getTargetMacAddress()); |
| } |
| |
| @Override |
| public void entryUpdated(ArpReplyNotification arpReply) { |
| entryAdded(arpReply); |
| } |
| |
| @Override |
| public void entryRemoved(ArpReplyNotification arpReply) { |
| //Not implemented. ArpReplyEventHandler is used only for remote messaging. |
| } |
| } |
| |
| private class ArpCacheEventHandler implements |
| IEventChannelListener<String, ArpCacheNotification> { |
| |
| /** |
| * Startup processing. |
| */ |
| private void startUp() { |
| // |
| // TODO: Read all state from the database: |
| // For now, as a shortcut we read it from the datagrid |
| // |
| Collection<ArpCacheNotification> arpCacheEvents = |
| arpCacheEventChannel.getAllEntries(); |
| |
| for (ArpCacheNotification arpCacheEvent : arpCacheEvents) { |
| entryAdded(arpCacheEvent); |
| } |
| } |
| |
| @Override |
| public void entryAdded(ArpCacheNotification value) { |
| try { |
| InetAddress targetIpAddress = |
| InetAddress.getByAddress(value.getTargetAddress()); |
| |
| log.debug("Received entryAdded for ARP cache notification " + |
| "for ip {}, mac {}", targetIpAddress, value.getTargetMacAddress()); |
| arpCache.update(targetIpAddress, |
| MACAddress.valueOf(value.getTargetMacAddress())); |
| } catch (UnknownHostException e) { |
| log.error("Unknown host", e); |
| } |
| } |
| |
| @Override |
| public void entryRemoved(ArpCacheNotification value) { |
| log.debug("Received entryRemoved for ARP cache notification for ip {}, mac {}", |
| value.getTargetAddress(), value.getTargetMacAddress()); |
| try { |
| arpCache.remove(InetAddress.getByAddress(value.getTargetAddress())); |
| } catch (UnknownHostException e) { |
| log.error("Unknown host", e); |
| } |
| } |
| |
| @Override |
| public void entryUpdated(ArpCacheNotification value) { |
| try { |
| InetAddress targetIpAddress = |
| InetAddress.getByAddress(value.getTargetAddress()); |
| |
| log.debug("Received entryUpdated for ARP cache notification " + |
| "for ip {}, mac {}", targetIpAddress, value.getTargetMacAddress()); |
| arpCache.update(targetIpAddress, |
| MACAddress.valueOf(value.getTargetMacAddress())); |
| } catch (UnknownHostException e) { |
| log.error("Unknown host", e); |
| } |
| } |
| } |
| |
| private static class ArpRequest { |
| private final IArpRequester requester; |
| private final boolean retry; |
| private long requestTime; |
| |
| public ArpRequest(IArpRequester requester, boolean retry) { |
| this.requester = requester; |
| this.retry = retry; |
| |
| requestTime = System.currentTimeMillis(); |
| } |
| |
| public ArpRequest(ArpRequest old) { |
| this.requester = old.requester; |
| this.retry = old.retry; |
| } |
| |
| public boolean isExpired() { |
| return ((System.currentTimeMillis() - requestTime) |
| > arpRequestTimeoutConfig); |
| } |
| |
| public boolean shouldRetry() { |
| return retry; |
| } |
| |
| public void dispatchReply(InetAddress ipAddress, |
| MACAddress replyMacAddress) { |
| requester.arpResponse(ipAddress, replyMacAddress); |
| } |
| } |
| |
| private class HostArpRequester implements IArpRequester { |
| private final ARP arpRequest; |
| private final long dpid; |
| private final short port; |
| |
| public HostArpRequester(ARP arpRequest, long dpid, short port) { |
| this.arpRequest = arpRequest; |
| this.dpid = dpid; |
| this.port = port; |
| } |
| |
| @Override |
| public void arpResponse(InetAddress ipAddress, MACAddress macAddress) { |
| ProxyArpManager.this.sendArpReply(arpRequest, dpid, port, |
| macAddress); |
| } |
| } |
| |
| @Override |
| public Collection<Class<? extends IFloodlightService>> getModuleServices() { |
| Collection<Class<? extends IFloodlightService>> l = |
| new ArrayList<Class<? extends IFloodlightService>>(); |
| l.add(IProxyArpService.class); |
| return l; |
| } |
| |
| @Override |
| public Map<Class<? extends IFloodlightService>, IFloodlightService> getServiceImpls() { |
| Map<Class<? extends IFloodlightService>, IFloodlightService> m = |
| new HashMap<Class<? extends IFloodlightService>, IFloodlightService>(); |
| m.put(IProxyArpService.class, this); |
| return m; |
| } |
| |
| @Override |
| public Collection<Class<? extends IFloodlightService>> getModuleDependencies() { |
| Collection<Class<? extends IFloodlightService>> dependencies = |
| new ArrayList<Class<? extends IFloodlightService>>(); |
| dependencies.add(IRestApiService.class); |
| dependencies.add(IDatagridService.class); |
| dependencies.add(IConfigInfoService.class); |
| dependencies.add(ITopologyService.class); |
| dependencies.add(IPacketService.class); |
| return dependencies; |
| } |
| |
| @Override |
| public void init(FloodlightModuleContext context) { |
| this.configService = context.getServiceImpl(IConfigInfoService.class); |
| this.restApi = context.getServiceImpl(IRestApiService.class); |
| this.datagrid = context.getServiceImpl(IDatagridService.class); |
| this.topologyService = context.getServiceImpl(ITopologyService.class); |
| this.packetService = context.getServiceImpl(IPacketService.class); |
| |
| arpRequests = Multimaps.synchronizedSetMultimap(HashMultimap |
| .<InetAddress, ArpRequest>create()); |
| } |
| |
| @Override |
| public void startUp(FloodlightModuleContext context) { |
| Map<String, String> configOptions = context.getConfigParams(this); |
| |
| try { |
| arpCleaningTimerPeriodConfig = |
| Long.parseLong(configOptions.get("cleanupmsec")); |
| } catch (NumberFormatException e) { |
| log.debug("ArpCleaningTimerPeriod related config options were " + |
| "not set. Using default."); |
| } |
| |
| Long agingmsec = null; |
| try { |
| agingmsec = Long.parseLong(configOptions.get("agingmsec")); |
| } catch (NumberFormatException e) { |
| log.debug("ArpEntryTimeout related config options were " + |
| "not set. Using default."); |
| } |
| |
| arpCache = new ArpCache(); |
| if (agingmsec != null) { |
| arpCache.setArpEntryTimeoutConfig(agingmsec); |
| } |
| |
| this.vlan = configService.getVlan(); |
| log.info("vlan set to {}", this.vlan); |
| |
| restApi.addRestletRoutable(new ArpWebRoutable()); |
| packetService.registerPacketListener(this); |
| mutableTopology = topologyService.getTopology(); |
| |
| // |
| // Event notification setup: channels and event handlers |
| // |
| |
| arpReplyEventChannel = datagrid.addListener(ARP_REPLY_CHANNEL_NAME, |
| arpReplyEventHandler, |
| Long.class, |
| ArpReplyNotification.class); |
| |
| arpCacheEventChannel = datagrid.addListener(ARP_CACHE_CHANNEL_NAME, |
| arpCacheEventHandler, |
| String.class, |
| ArpCacheNotification.class); |
| arpCacheEventHandler.startUp(); |
| |
| Timer arpTimer = new Timer("arp-processing"); |
| arpTimer.scheduleAtFixedRate(new TimerTask() { |
| @Override |
| public void run() { |
| doPeriodicArpProcessing(); |
| } |
| }, 0, arpTimerPeriodConfig); |
| |
| Timer arpCacheTimer = new Timer("arp-cleaning"); |
| arpCacheTimer.scheduleAtFixedRate(new TimerTask() { |
| @Override |
| public void run() { |
| doPeriodicArpCleaning(); |
| } |
| }, 0, arpCleaningTimerPeriodConfig); |
| } |
| |
| /* |
| * Function that runs periodically to manage the asynchronous request mechanism. |
| * It basically cleans up old ARP requests if we don't get a response for them. |
| * The caller can designate that a request should be retried indefinitely, and |
| * this task will handle that as well. |
| */ |
| private void doPeriodicArpProcessing() { |
| SetMultimap<InetAddress, ArpRequest> retryList = HashMultimap |
| .<InetAddress, ArpRequest>create(); |
| |
| // We must synchronize externally on the Multimap while using an |
| // iterator, even though it's a synchronizedMultimap |
| synchronized (arpRequests) { |
| Iterator<Map.Entry<InetAddress, ArpRequest>> it = arpRequests |
| .entries().iterator(); |
| |
| while (it.hasNext()) { |
| Map.Entry<InetAddress, ArpRequest> entry = it.next(); |
| ArpRequest request = entry.getValue(); |
| if (request.isExpired()) { |
| log.debug("Cleaning expired ARP request for {}", entry |
| .getKey().getHostAddress()); |
| |
| it.remove(); |
| |
| if (request.shouldRetry()) { |
| retryList.put(entry.getKey(), request); |
| } |
| } |
| } |
| } |
| |
| for (Map.Entry<InetAddress, Collection<ArpRequest>> entry : retryList |
| .asMap().entrySet()) { |
| |
| InetAddress address = entry.getKey(); |
| |
| log.debug("Resending ARP request for {}", address.getHostAddress()); |
| |
| // Only ARP requests sent by the controller will have the retry flag |
| // set, so for now we can just send a new ARP request for that |
| // address. |
| sendArpRequestForAddress(address); |
| |
| for (ArpRequest request : entry.getValue()) { |
| arpRequests.put(address, new ArpRequest(request)); |
| } |
| } |
| } |
| |
| @Override |
| public void receive(Switch sw, Port inPort, Ethernet eth) { |
| |
| if (eth.getEtherType() == Ethernet.TYPE_ARP) { |
| ARP arp = (ARP) eth.getPayload(); |
| learnArp(arp); |
| if (arp.getOpCode() == ARP.OP_REQUEST) { |
| handleArpRequest(sw.getDpid().value(), inPort.getNumber().shortValue(), |
| arp, eth); |
| } else if (arp.getOpCode() == ARP.OP_REPLY) { |
| // For replies we simply send a notification via Hazelcast |
| sendArpReplyNotification(eth); |
| } |
| } |
| } |
| |
| private void learnArp(ARP arp) { |
| ArpCacheNotification arpCacheNotification = null; |
| |
| arpCacheNotification = new ArpCacheNotification( |
| arp.getSenderProtocolAddress(), arp.getSenderHardwareAddress()); |
| |
| try { |
| arpCacheEventChannel.addEntry(InetAddress.getByAddress( |
| arp.getSenderProtocolAddress()).toString(), arpCacheNotification); |
| } catch (UnknownHostException e) { |
| log.error("Unknown host", e); |
| } |
| } |
| |
| private void handleArpRequest(long dpid, short inPort, ARP arp, Ethernet eth) { |
| if (log.isTraceEnabled()) { |
| log.trace("ARP request received for {}", |
| inetAddressToString(arp.getTargetProtocolAddress())); |
| } |
| |
| InetAddress target; |
| InetAddress sender; |
| try { |
| target = InetAddress.getByAddress(arp.getTargetProtocolAddress()); |
| sender = InetAddress.getByAddress(arp.getSenderProtocolAddress()); |
| |
| } catch (UnknownHostException e) { |
| log.debug("Invalid address in ARP request", e); |
| return; |
| } |
| |
| // Handle ARP from external network |
| if (configService.fromExternalNetwork(dpid, inPort)) { |
| // If the request came from outside our network, we only care if |
| // it was a request for one of our interfaces. |
| if (configService.isInterfaceAddress(target)) { |
| log.trace( |
| "ARP request for our interface. Sending reply {} => {}", |
| target.getHostAddress(), |
| configService.getRouterMacAddress()); |
| |
| //TODO: learn MAC address dynamically rather than from configuration |
| sendArpReply(arp, dpid, inPort, |
| configService.getRouterMacAddress()); |
| } |
| |
| return; |
| } |
| |
| // Handle ARP to external network |
| if (configService.inConnectedNetwork(target) |
| && configService.isInterfaceAddress(sender)) { |
| SwitchPort switchPort = |
| configService.getOutgoingInterface(target).getSwitchPort(); |
| arpRequests.put(target, new ArpRequest( |
| new HostArpRequester(arp, dpid, inPort), false)); |
| packetService.sendPacket(eth, switchPort); |
| return; |
| } |
| |
| //MACAddress mac = arpCache.lookup(target); |
| |
| arpRequests.put(target, new ArpRequest( |
| new HostArpRequester(arp, dpid, inPort), false)); |
| |
| mutableTopology.acquireReadLock(); |
| Host targetHost = mutableTopology.getHostByMac( |
| MACAddress.valueOf(arp.getTargetHardwareAddress())); |
| mutableTopology.releaseReadLock(); |
| |
| if (targetHost == null) { |
| if (log.isTraceEnabled()) { |
| log.trace("No device info found for {} - broadcasting", |
| target.getHostAddress()); |
| } |
| |
| // We don't know the device so broadcast the request out |
| packetService.broadcastPacketOutInternalEdge(eth, |
| new SwitchPort(dpid, inPort)); |
| } else { |
| // Even if the device exists in our database, we do not reply to |
| // the request directly, but check whether the device is still valid |
| MACAddress macAddress = MACAddress.valueOf(arp.getTargetHardwareAddress()); |
| |
| if (log.isTraceEnabled()) { |
| log.trace("The target Host Record in DB is: {} => {} " + |
| "from ARP request host at {}/{}", new Object[]{ |
| inetAddressToString(arp.getTargetProtocolAddress()), |
| macAddress, HexString.toHexString(dpid), inPort}); |
| } |
| |
| // sendArpReply(arp, sw.getId(), pi.getInPort(), macAddress); |
| |
| Iterable<Port> outPorts = targetHost.getAttachmentPoints(); |
| |
| if (!outPorts.iterator().hasNext()) { |
| if (log.isTraceEnabled()) { |
| log.trace("Host {} exists but is not connected to any ports" + |
| " - broadcasting", macAddress); |
| } |
| |
| packetService.broadcastPacketOutInternalEdge(eth, |
| new SwitchPort(dpid, inPort)); |
| } else { |
| for (Port portObject : outPorts) { |
| |
| if (portObject.getOutgoingLink() != null || |
| portObject.getIncomingLink() != null) { |
| continue; |
| } |
| |
| PortNumber outPort = portObject.getNumber(); |
| Switch outSwitchObject = portObject.getSwitch(); |
| Dpid outSwitch = outSwitchObject.getDpid(); |
| |
| if (log.isTraceEnabled()) { |
| log.trace("Probing device {} on port {}/{}", |
| new Object[]{macAddress, |
| outSwitch, outPort}); |
| } |
| |
| packetService.sendPacket( |
| eth, new SwitchPort(outSwitch, outPort)); |
| } |
| } |
| } |
| } |
| |
| // TODO this method has not been tested after recent implementation changes. |
| private void sendArpRequestForAddress(InetAddress ipAddress) { |
| // TODO what should the sender IP address and MAC address be if no |
| // IP addresses are configured? Will there ever be a need to send |
| // ARP requests from the controller in that case? |
| // All-zero MAC address doesn't seem to work - hosts don't respond to it |
| |
| byte[] zeroIpv4 = {0x0, 0x0, 0x0, 0x0}; |
| byte[] zeroMac = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
| byte[] genericNonZeroMac = {0x0, 0x0, 0x0, 0x0, 0x0, 0x01}; |
| byte[] broadcastMac = {(byte) 0xff, (byte) 0xff, (byte) 0xff, |
| (byte) 0xff, (byte) 0xff, (byte) 0xff}; |
| |
| ARP arpRequest = new ARP(); |
| |
| arpRequest |
| .setHardwareType(ARP.HW_TYPE_ETHERNET) |
| .setProtocolType(ARP.PROTO_TYPE_IP) |
| .setHardwareAddressLength( |
| (byte) Ethernet.DATALAYER_ADDRESS_LENGTH) |
| .setProtocolAddressLength((byte) IPv4.ADDRESS_LENGTH) |
| .setOpCode(ARP.OP_REQUEST).setTargetHardwareAddress(zeroMac) |
| .setTargetProtocolAddress(ipAddress.getAddress()); |
| |
| MACAddress routerMacAddress = configService.getRouterMacAddress(); |
| // As for now, it's unclear what the MAC address should be |
| byte[] senderMacAddress = genericNonZeroMac; |
| if (routerMacAddress != null) { |
| senderMacAddress = routerMacAddress.toBytes(); |
| } |
| arpRequest.setSenderHardwareAddress(senderMacAddress); |
| |
| byte[] senderIPAddress = zeroIpv4; |
| Interface intf = configService.getOutgoingInterface(ipAddress); |
| if (intf == null) { |
| // TODO handle the case where the controller needs to send an ARP |
| // request but there's not IP configuration. In this case the |
| // request should be broadcast out all edge ports in the network. |
| log.warn("Cannot send ARP: there is no outgoing interface in the " |
| + "configuration"); |
| return; |
| } |
| |
| senderIPAddress = intf.getIpAddress().getAddress(); |
| |
| arpRequest.setSenderProtocolAddress(senderIPAddress); |
| |
| Ethernet eth = new Ethernet(); |
| eth.setSourceMACAddress(senderMacAddress) |
| .setDestinationMACAddress(broadcastMac) |
| .setEtherType(Ethernet.TYPE_ARP).setPayload(arpRequest); |
| |
| if (vlan != NO_VLAN) { |
| eth.setVlanID(vlan).setPriorityCode((byte) 0); |
| } |
| |
| // sendArpRequestToSwitches(ipAddress, eth.serialize()); |
| |
| packetService.sendPacket( |
| eth, new SwitchPort(intf.getDpid(), intf.getPort())); |
| } |
| |
| // Please leave it for now because this code is needed for SDN-IP. |
| // It will be removed soon. |
| /* |
| private void sendArpRequestToSwitches(InetAddress dstAddress, byte[] arpRequest) { |
| sendArpRequestToSwitches(dstAddress, arpRequest, |
| 0, OFPort.OFPP_NONE.getValue()); |
| } |
| |
| private void sendArpRequestToSwitches(InetAddress dstAddress, byte[] arpRequest, |
| long inSwitch, short inPort) { |
| |
| if (configService.hasLayer3Configuration()) { |
| Interface intf = configService.getOutgoingInterface(dstAddress); |
| if (intf != null) { |
| sendArpRequestOutPort(arpRequest, intf.getDpid(), intf.getPort()); |
| } |
| else { |
| //TODO here it should be broadcast out all non-interface edge ports. |
| //I think we can assume that if it's not a request for an external |
| //network, it's an ARP for a host in our own network. So we want to |
| //send it out all edge ports that don't have an interface configured |
| //to ensure it reaches all hosts in our network. |
| log.debug("No interface found to send ARP request for {}", |
| dstAddress.getHostAddress()); |
| } |
| } |
| else { |
| broadcastArpRequestOutEdge(arpRequest, inSwitch, inPort); |
| } |
| } |
| */ |
| |
| private void sendArpReplyNotification(Ethernet eth) { |
| ARP arp = (ARP) eth.getPayload(); |
| |
| if (log.isTraceEnabled()) { |
| log.trace("Sending ARP reply for {} to other ONOS instances", |
| inetAddressToString(arp.getSenderProtocolAddress())); |
| } |
| |
| InetAddress targetAddress; |
| |
| try { |
| targetAddress = InetAddress.getByAddress(arp |
| .getSenderProtocolAddress()); |
| } catch (UnknownHostException e) { |
| log.error("Unknown host", e); |
| return; |
| } |
| |
| int intAddress = InetAddresses.coerceToInteger(targetAddress); |
| |
| MACAddress mac = new MACAddress(arp.getSenderHardwareAddress()); |
| |
| ArpReplyNotification value = new ArpReplyNotification(intAddress, mac); |
| |
| log.debug("ArpReplyNotification ip {}, mac {}", intAddress, mac); |
| arpReplyEventChannel.addTransientEntry(mac.toLong(), value); |
| } |
| |
| private void sendArpReply(ARP arpRequest, long dpid, short port, |
| MACAddress targetMac) { |
| if (log.isTraceEnabled()) { |
| log.trace("Sending reply {} => {} to {}", |
| new Object[]{ |
| inetAddressToString(arpRequest.getTargetProtocolAddress()), |
| targetMac, inetAddressToString(arpRequest |
| .getSenderProtocolAddress())}); |
| } |
| |
| ARP arpReply = new ARP(); |
| arpReply.setHardwareType(ARP.HW_TYPE_ETHERNET) |
| .setProtocolType(ARP.PROTO_TYPE_IP) |
| .setHardwareAddressLength( |
| (byte) Ethernet.DATALAYER_ADDRESS_LENGTH) |
| .setProtocolAddressLength((byte) IPv4.ADDRESS_LENGTH) |
| .setOpCode(ARP.OP_REPLY) |
| .setSenderHardwareAddress(targetMac.toBytes()) |
| .setSenderProtocolAddress(arpRequest.getTargetProtocolAddress()) |
| .setTargetHardwareAddress(arpRequest.getSenderHardwareAddress()) |
| .setTargetProtocolAddress(arpRequest.getSenderProtocolAddress()); |
| |
| Ethernet eth = new Ethernet(); |
| eth.setDestinationMACAddress(arpRequest.getSenderHardwareAddress()) |
| .setSourceMACAddress(targetMac.toBytes()) |
| .setEtherType(Ethernet.TYPE_ARP).setPayload(arpReply); |
| |
| if (vlan != NO_VLAN) { |
| eth.setVlanID(vlan).setPriorityCode((byte) 0); |
| } |
| |
| packetService.sendPacket(eth, new SwitchPort(dpid, port)); |
| } |
| |
| private String inetAddressToString(byte[] bytes) { |
| try { |
| return InetAddress.getByAddress(bytes).getHostAddress(); |
| } catch (UnknownHostException e) { |
| log.debug("Invalid IP address", e); |
| return ""; |
| } |
| } |
| |
| /* |
| * IProxyArpService methods |
| */ |
| |
| @Override |
| public MACAddress getMacAddress(InetAddress ipAddress) { |
| return arpCache.lookup(ipAddress); |
| } |
| |
| @Override |
| public void sendArpRequest(InetAddress ipAddress, IArpRequester requester, |
| boolean retry) { |
| arpRequests.put(ipAddress, new ArpRequest(requester, retry)); |
| |
| // Sanity check to make sure we don't send a request for our own address |
| if (!configService.isInterfaceAddress(ipAddress)) { |
| sendArpRequestForAddress(ipAddress); |
| } |
| } |
| |
| @Override |
| public List<String> getMappings() { |
| return arpCache.getMappings(); |
| } |
| |
| private void sendArpReplyToWaitingRequesters(InetAddress address, |
| MACAddress mac) { |
| log.debug("Sending ARP reply for {} to requesters", |
| address.getHostAddress()); |
| |
| // See if anyone's waiting for this ARP reply |
| Set<ArpRequest> requests = arpRequests.get(address); |
| |
| // Synchronize on the Multimap while using an iterator for one of the |
| // sets |
| List<ArpRequest> requestsToSend = new ArrayList<ArpRequest>( |
| requests.size()); |
| synchronized (arpRequests) { |
| Iterator<ArpRequest> it = requests.iterator(); |
| while (it.hasNext()) { |
| ArpRequest request = it.next(); |
| it.remove(); |
| requestsToSend.add(request); |
| } |
| } |
| |
| // Don't hold an ARP lock while dispatching requests |
| for (ArpRequest request : requestsToSend) { |
| request.dispatchReply(address, mac); |
| } |
| } |
| |
| private void doPeriodicArpCleaning() { |
| List<InetAddress> expiredipslist = arpCache.getExpiredArpCacheIps(); |
| for (InetAddress expireIp : expiredipslist) { |
| log.debug("call arpCacheEventChannel.removeEntry, ip {}", expireIp); |
| arpCacheEventChannel.removeEntry(expireIp.toString()); |
| } |
| } |
| |
| public long getArpEntryTimeout() { |
| return arpCache.getArpEntryTimeout(); |
| } |
| |
| public long getArpCleaningTimerPeriod() { |
| return arpCleaningTimerPeriodConfig; |
| } |
| |
| /** |
| * Replaces the internal ArpCache. |
| * |
| * @param cache ArpCache instance |
| * |
| * @exclude Backdoor for unit testing purpose only, do not use. |
| */ |
| void debugReplaceArpCache(final ArpCache cache) { |
| this.arpCache = cache; |
| } |
| } |