| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.dhcp.impl; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Lists; |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.jboss.netty.util.Timeout; |
| import org.jboss.netty.util.TimerTask; |
| import org.onlab.packet.ARP; |
| import org.onlab.packet.DHCP; |
| import org.onlab.packet.DHCPOption; |
| import org.onlab.packet.DHCPPacketType; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.TpPort; |
| import org.onlab.packet.UDP; |
| import org.onlab.packet.VlanId; |
| import org.onlab.util.Timer; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.dhcp.DhcpService; |
| import org.onosproject.dhcp.DhcpStore; |
| import org.onosproject.dhcp.IpAssignment; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.Host; |
| import org.onosproject.net.HostId; |
| import org.onosproject.net.HostLocation; |
| import org.onosproject.net.config.ConfigFactory; |
| import org.onosproject.net.config.NetworkConfigEvent; |
| import org.onosproject.net.config.NetworkConfigListener; |
| import org.onosproject.net.config.NetworkConfigRegistry; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.host.DefaultHostDescription; |
| import org.onosproject.net.host.HostProvider; |
| import org.onosproject.net.host.HostProviderRegistry; |
| import org.onosproject.net.host.HostProviderService; |
| import org.onosproject.net.packet.DefaultOutboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketPriority; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.net.provider.AbstractProvider; |
| import org.onosproject.net.provider.ProviderId; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.Date; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.TimeUnit; |
| import static org.onlab.packet.MacAddress.valueOf; |
| import static org.onosproject.net.config.basics.SubjectFactories.APP_SUBJECT_FACTORY; |
| |
| /** |
| * Skeletal ONOS DHCP Server application. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class DhcpManager implements DhcpService { |
| |
| private static final ProviderId PID = new ProviderId("of", "org.onosproject.dhcp", true); |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private final InternalConfigListener cfgListener = new InternalConfigListener(); |
| |
| private final Set<ConfigFactory> factories = ImmutableSet.of( |
| new ConfigFactory<ApplicationId, DhcpConfig>(APP_SUBJECT_FACTORY, |
| DhcpConfig.class, |
| "dhcp") { |
| @Override |
| public DhcpConfig createConfig() { |
| return new DhcpConfig(); |
| } |
| } |
| ); |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected NetworkConfigRegistry cfgService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| private DhcpPacketProcessor processor = new DhcpPacketProcessor(); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DhcpStore dhcpStore; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected HostProviderRegistry hostProviderRegistry; |
| |
| protected HostProviderService hostProviderService; |
| |
| private final HostProvider hostProvider = new InternalHostProvider(); |
| |
| private ApplicationId appId; |
| |
| // Hardcoded values are default values. |
| |
| private static Ip4Address myIP = Ip4Address.valueOf("10.0.0.2"); |
| |
| private static MacAddress myMAC = valueOf("4f:4f:4f:4f:4f:4f"); |
| |
| /** |
| * leaseTime - 10 mins or 600s. |
| * renewalTime - 5 mins or 300s. |
| * rebindingTime - 6 mins or 360s. |
| */ |
| |
| private static int leaseTime = 600; |
| |
| private static int renewalTime = 300; |
| |
| private static int rebindingTime = 360; |
| |
| private static byte packetTTL = (byte) 127; |
| |
| private static Ip4Address subnetMask = Ip4Address.valueOf("255.0.0.0"); |
| |
| private static Ip4Address broadcastAddress = Ip4Address.valueOf("10.255.255.255"); |
| |
| private static Ip4Address routerAddress = Ip4Address.valueOf("10.0.0.2"); |
| |
| private static Ip4Address domainServer = Ip4Address.valueOf("10.0.0.2"); |
| |
| private static final Ip4Address IP_BROADCAST = Ip4Address.valueOf("255.255.255.255"); |
| |
| protected Timeout timeout; |
| |
| protected static int timerDelay = 2; |
| |
| @Activate |
| protected void activate() { |
| // start the dhcp server |
| appId = coreService.registerApplication("org.onosproject.dhcp"); |
| |
| cfgService.addListener(cfgListener); |
| factories.forEach(cfgService::registerConfigFactory); |
| cfgListener.reconfigureNetwork(cfgService.getConfig(appId, DhcpConfig.class)); |
| hostProviderService = hostProviderRegistry.register(hostProvider); |
| packetService.addProcessor(processor, PacketProcessor.director(0)); |
| requestPackets(); |
| timeout = Timer.getTimer().newTimeout(new PurgeListTask(), timerDelay, TimeUnit.MINUTES); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| cfgService.removeListener(cfgListener); |
| factories.forEach(cfgService::unregisterConfigFactory); |
| packetService.removeProcessor(processor); |
| hostProviderRegistry.unregister(hostProvider); |
| hostProviderService = null; |
| cancelPackets(); |
| timeout.cancel(); |
| log.info("Stopped"); |
| } |
| |
| /** |
| * Request packet in via PacketService. |
| */ |
| private void requestPackets() { |
| |
| TrafficSelector.Builder selectorServer = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_UDP) |
| .matchUdpDst(TpPort.tpPort(UDP.DHCP_SERVER_PORT)) |
| .matchUdpSrc(TpPort.tpPort(UDP.DHCP_CLIENT_PORT)); |
| packetService.requestPackets(selectorServer.build(), PacketPriority.CONTROL, appId); |
| |
| selectorServer = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_ARP); |
| packetService.requestPackets(selectorServer.build(), PacketPriority.CONTROL, appId); |
| } |
| |
| /** |
| * Cancel requested packets in via packet service. |
| */ |
| private void cancelPackets() { |
| TrafficSelector.Builder selectorServer = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_UDP) |
| .matchUdpDst(TpPort.tpPort(UDP.DHCP_SERVER_PORT)) |
| .matchUdpSrc(TpPort.tpPort(UDP.DHCP_CLIENT_PORT)); |
| packetService.cancelPackets(selectorServer.build(), PacketPriority.CONTROL, appId); |
| |
| selectorServer = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_ARP); |
| packetService.cancelPackets(selectorServer.build(), PacketPriority.CONTROL, appId); |
| } |
| |
| @Override |
| public Map<HostId, IpAssignment> listMapping() { |
| return dhcpStore.listAssignedMapping(); |
| } |
| |
| @Override |
| public int getLeaseTime() { |
| return leaseTime; |
| } |
| |
| @Override |
| public int getRenewalTime() { |
| return renewalTime; |
| } |
| |
| @Override |
| public int getRebindingTime() { |
| return rebindingTime; |
| } |
| |
| @Override |
| public boolean setStaticMapping(MacAddress macID, Ip4Address ipAddress, boolean rangeNotEnforced, |
| List<Ip4Address> addressList) { |
| log.debug("setStaticMapping is called with Mac: {}, Ip: {} addressList: {}", |
| macID.toString(), ipAddress.toString(), addressList.toString()); |
| |
| return dhcpStore.assignStaticIP(macID, ipAddress, rangeNotEnforced, addressList); |
| } |
| |
| @Override |
| public boolean removeStaticMapping(MacAddress macID) { |
| return dhcpStore.removeStaticIP(macID); |
| } |
| |
| @Override |
| public Iterable<Ip4Address> getAvailableIPs() { |
| return dhcpStore.getAvailableIPs(); |
| } |
| |
| private class DhcpPacketProcessor implements PacketProcessor { |
| |
| /** |
| * Builds the DHCP Reply packet. |
| * |
| * @param packet the incoming Ethernet frame |
| * @param ipOffered the IP offered by the DHCP Server |
| * @param outgoingMessageType the message type of the outgoing packet |
| * @return the Ethernet reply frame |
| */ |
| private Ethernet buildReply(Ethernet packet, Ip4Address ipOffered, byte outgoingMessageType) { |
| |
| Ip4Address subnetMaskReply; |
| Ip4Address dhcpServerReply; |
| Ip4Address routerAddressReply; |
| Ip4Address domainServerReply; |
| IpAssignment ipAssignment; |
| |
| ipAssignment = dhcpStore.getIpAssignmentFromAllocationMap(HostId.hostId(packet.getSourceMAC())); |
| |
| if (ipAssignment != null && ipAssignment.rangeNotEnforced()) { |
| subnetMaskReply = ipAssignment.subnetMask(); |
| dhcpServerReply = ipAssignment.dhcpServer(); |
| domainServerReply = ipAssignment.domainServer(); |
| routerAddressReply = ipAssignment.routerAddress(); |
| } else { |
| subnetMaskReply = subnetMask; |
| dhcpServerReply = myIP; |
| routerAddressReply = routerAddress; |
| domainServerReply = domainServer; |
| } |
| |
| // Ethernet Frame. |
| Ethernet ethReply = new Ethernet(); |
| ethReply.setSourceMACAddress(myMAC); |
| ethReply.setDestinationMACAddress(packet.getSourceMAC()); |
| ethReply.setEtherType(Ethernet.TYPE_IPV4); |
| ethReply.setVlanID(packet.getVlanID()); |
| |
| // IP Packet |
| IPv4 ipv4Packet = (IPv4) packet.getPayload(); |
| IPv4 ipv4Reply = new IPv4(); |
| ipv4Reply.setSourceAddress(dhcpServerReply.toInt()); |
| ipv4Reply.setDestinationAddress(ipOffered.toInt()); |
| ipv4Reply.setTtl(packetTTL); |
| |
| // UDP Datagram. |
| UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| UDP udpReply = new UDP(); |
| udpReply.setSourcePort((byte) UDP.DHCP_SERVER_PORT); |
| udpReply.setDestinationPort((byte) UDP.DHCP_CLIENT_PORT); |
| |
| // DHCP Payload. |
| DHCP dhcpPacket = (DHCP) udpPacket.getPayload(); |
| DHCP dhcpReply = new DHCP(); |
| dhcpReply.setOpCode(DHCP.OPCODE_REPLY); |
| dhcpReply.setFlags(dhcpPacket.getFlags()); |
| dhcpReply.setGatewayIPAddress(dhcpPacket.getGatewayIPAddress()); |
| dhcpReply.setClientHardwareAddress(dhcpPacket.getClientHardwareAddress()); |
| dhcpReply.setTransactionId(dhcpPacket.getTransactionId()); |
| |
| if (outgoingMessageType != DHCPPacketType.DHCPNAK.getValue()) { |
| dhcpReply.setYourIPAddress(ipOffered.toInt()); |
| dhcpReply.setServerIPAddress(dhcpServerReply.toInt()); |
| if (dhcpPacket.getGatewayIPAddress() == 0) { |
| ipv4Reply.setDestinationAddress(IP_BROADCAST.toInt()); |
| } |
| } |
| dhcpReply.setHardwareType(DHCP.HWTYPE_ETHERNET); |
| dhcpReply.setHardwareAddressLength((byte) 6); |
| |
| // DHCP Options. |
| DHCPOption option = new DHCPOption(); |
| List<DHCPOption> optionList = new ArrayList<>(); |
| |
| // DHCP Message Type. |
| option.setCode(DHCP.DHCPOptionCode.OptionCode_MessageType.getValue()); |
| option.setLength((byte) 1); |
| byte[] optionData = {outgoingMessageType}; |
| option.setData(optionData); |
| optionList.add(option); |
| |
| // DHCP Server Identifier. |
| option = new DHCPOption(); |
| option.setCode(DHCP.DHCPOptionCode.OptionCode_DHCPServerIp.getValue()); |
| option.setLength((byte) 4); |
| option.setData(dhcpServerReply.toOctets()); |
| optionList.add(option); |
| |
| if (outgoingMessageType != DHCPPacketType.DHCPNAK.getValue()) { |
| |
| // IP Address Lease Time. |
| option = new DHCPOption(); |
| option.setCode(DHCP.DHCPOptionCode.OptionCode_LeaseTime.getValue()); |
| option.setLength((byte) 4); |
| option.setData(ByteBuffer.allocate(4) |
| .putInt(ipAssignment == null ? leaseTime : ipAssignment.leasePeriod()).array()); |
| optionList.add(option); |
| |
| // IP Address Renewal Time. |
| option = new DHCPOption(); |
| option.setCode(DHCP.DHCPOptionCode.OptionCode_RenewalTime.getValue()); |
| option.setLength((byte) 4); |
| option.setData(ByteBuffer.allocate(4).putInt(renewalTime).array()); |
| optionList.add(option); |
| |
| // IP Address Rebinding Time. |
| option = new DHCPOption(); |
| option.setCode(DHCP.DHCPOptionCode.OPtionCode_RebindingTime.getValue()); |
| option.setLength((byte) 4); |
| option.setData(ByteBuffer.allocate(4).putInt(rebindingTime).array()); |
| optionList.add(option); |
| |
| // Subnet Mask. |
| option = new DHCPOption(); |
| option.setCode(DHCP.DHCPOptionCode.OptionCode_SubnetMask.getValue()); |
| option.setLength((byte) 4); |
| option.setData(subnetMaskReply.toOctets()); |
| optionList.add(option); |
| |
| // Broadcast Address. |
| option = new DHCPOption(); |
| option.setCode(DHCP.DHCPOptionCode.OptionCode_BroadcastAddress.getValue()); |
| option.setLength((byte) 4); |
| option.setData(broadcastAddress.toOctets()); |
| optionList.add(option); |
| |
| // Router Address. |
| option = new DHCPOption(); |
| option.setCode(DHCP.DHCPOptionCode.OptionCode_RouterAddress.getValue()); |
| option.setLength((byte) 4); |
| option.setData(routerAddressReply.toOctets()); |
| optionList.add(option); |
| |
| // DNS Server Address. |
| option = new DHCPOption(); |
| option.setCode(DHCP.DHCPOptionCode.OptionCode_DomainServer.getValue()); |
| option.setLength((byte) 4); |
| option.setData(domainServerReply.toOctets()); |
| optionList.add(option); |
| } |
| |
| // End Option. |
| option = new DHCPOption(); |
| option.setCode(DHCP.DHCPOptionCode.OptionCode_END.getValue()); |
| option.setLength((byte) 1); |
| optionList.add(option); |
| |
| dhcpReply.setOptions(optionList); |
| udpReply.setPayload(dhcpReply); |
| ipv4Reply.setPayload(udpReply); |
| ethReply.setPayload(ipv4Reply); |
| |
| return ethReply; |
| } |
| |
| /** |
| * Sends the Ethernet reply frame via the Packet Service. |
| * |
| * @param context the context of the incoming frame |
| * @param reply the Ethernet reply frame |
| */ |
| private void sendReply(PacketContext context, Ethernet reply) { |
| if (reply != null) { |
| TrafficTreatment.Builder builder = DefaultTrafficTreatment.builder(); |
| ConnectPoint sourcePoint = context.inPacket().receivedFrom(); |
| builder.setOutput(sourcePoint.port()); |
| context.block(); |
| packetService.emit(new DefaultOutboundPacket(sourcePoint.deviceId(), |
| builder.build(), ByteBuffer.wrap(reply.serialize()))); |
| } |
| } |
| |
| /** |
| * Processes the DHCP Payload and initiates a reply to the client. |
| * |
| * @param context context of the incoming message |
| * @param dhcpPayload the extracted DHCP payload |
| */ |
| private void processDhcpPacket(PacketContext context, DHCP dhcpPayload) { |
| Ethernet packet = context.inPacket().parsed(); |
| boolean flagIfRequestedIP = false; |
| boolean flagIfServerIP = false; |
| Ip4Address requestedIP = Ip4Address.valueOf("0.0.0.0"); |
| Ip4Address serverIP = Ip4Address.valueOf("0.0.0.0"); |
| |
| if (dhcpPayload != null) { |
| |
| DHCPPacketType incomingPacketType = DHCPPacketType.getType(0); |
| for (DHCPOption option : dhcpPayload.getOptions()) { |
| if (option.getCode() == DHCP.DHCPOptionCode.OptionCode_MessageType.getValue()) { |
| byte[] data = option.getData(); |
| incomingPacketType = DHCPPacketType.getType(data[0]); |
| } |
| if (option.getCode() == DHCP.DHCPOptionCode.OptionCode_RequestedIP.getValue()) { |
| byte[] data = option.getData(); |
| requestedIP = Ip4Address.valueOf(data); |
| flagIfRequestedIP = true; |
| } |
| if (option.getCode() == DHCP.DHCPOptionCode.OptionCode_DHCPServerIp.getValue()) { |
| byte[] data = option.getData(); |
| serverIP = Ip4Address.valueOf(data); |
| flagIfServerIP = true; |
| } |
| } |
| DHCPPacketType outgoingPacketType; |
| MacAddress clientMac = new MacAddress(dhcpPayload.getClientHardwareAddress()); |
| VlanId vlanId = VlanId.vlanId(packet.getVlanID()); |
| HostId hostId = HostId.hostId(clientMac, vlanId); |
| |
| if (incomingPacketType.getValue() == DHCPPacketType.DHCPDISCOVER.getValue()) { |
| |
| outgoingPacketType = DHCPPacketType.DHCPOFFER; |
| Ip4Address ipOffered = null; |
| ipOffered = dhcpStore.suggestIP(hostId, requestedIP); |
| |
| if (ipOffered != null) { |
| Ethernet ethReply = buildReply(packet, ipOffered, |
| (byte) outgoingPacketType.getValue()); |
| sendReply(context, ethReply); |
| } |
| } else if (incomingPacketType.getValue() == DHCPPacketType.DHCPREQUEST.getValue()) { |
| |
| if (flagIfServerIP && flagIfRequestedIP) { |
| // SELECTING state |
| |
| |
| if (dhcpStore.getIpAssignmentFromAllocationMap(HostId.hostId(clientMac)) |
| .rangeNotEnforced()) { |
| outgoingPacketType = DHCPPacketType.DHCPACK; |
| Ethernet ethReply = buildReply(packet, requestedIP, (byte) outgoingPacketType.getValue()); |
| sendReply(context, ethReply); |
| } else { |
| if (myIP.equals(serverIP)) { |
| if (dhcpStore.assignIP(hostId, requestedIP, leaseTime, false, Lists.newArrayList())) { |
| outgoingPacketType = DHCPPacketType.DHCPACK; |
| discoverHost(context, requestedIP); |
| } else { |
| outgoingPacketType = DHCPPacketType.DHCPNAK; |
| } |
| Ethernet ethReply = buildReply(packet, requestedIP, |
| (byte) outgoingPacketType.getValue()); |
| sendReply(context, ethReply); |
| } |
| } |
| } else if (flagIfRequestedIP) { |
| // INIT-REBOOT state |
| if (dhcpStore.assignIP(hostId, requestedIP, leaseTime, false, Lists.newArrayList())) { |
| outgoingPacketType = DHCPPacketType.DHCPACK; |
| Ethernet ethReply = buildReply(packet, requestedIP, (byte) outgoingPacketType.getValue()); |
| sendReply(context, ethReply); |
| discoverHost(context, requestedIP); |
| } |
| |
| } else { |
| // RENEWING and REBINDING state |
| int ciaadr = dhcpPayload.getClientIPAddress(); |
| if (ciaadr != 0) { |
| Ip4Address clientIaddr = Ip4Address.valueOf(ciaadr); |
| if (dhcpStore.assignIP(hostId, clientIaddr, leaseTime, false, Lists.newArrayList())) { |
| outgoingPacketType = DHCPPacketType.DHCPACK; |
| discoverHost(context, clientIaddr); |
| } else if (packet.getEtherType() == Ethernet.TYPE_IPV4 && |
| ((IPv4) packet.getPayload()).getDestinationAddress() == myIP.toInt()) { |
| outgoingPacketType = DHCPPacketType.DHCPNAK; |
| } else { |
| return; |
| } |
| Ethernet ethReply = buildReply(packet, clientIaddr, (byte) outgoingPacketType.getValue()); |
| sendReply(context, ethReply); |
| } |
| } |
| } else if (incomingPacketType.getValue() == DHCPPacketType.DHCPRELEASE.getValue()) { |
| Ip4Address ip4Address = dhcpStore.releaseIP(hostId); |
| if (ip4Address != null) { |
| hostProviderService.removeIpFromHost(hostId, ip4Address); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Processes the ARP Payload and initiates a reply to the client. |
| * |
| * @param context context of the incoming message |
| * @param packet the ethernet payload |
| */ |
| private void processArpPacket(PacketContext context, Ethernet packet) { |
| |
| ARP arpPacket = (ARP) packet.getPayload(); |
| |
| ARP arpReply = (ARP) arpPacket.clone(); |
| arpReply.setOpCode(ARP.OP_REPLY); |
| |
| arpReply.setTargetProtocolAddress(arpPacket.getSenderProtocolAddress()); |
| arpReply.setTargetHardwareAddress(arpPacket.getSenderHardwareAddress()); |
| arpReply.setSenderProtocolAddress(arpPacket.getTargetProtocolAddress()); |
| arpReply.setSenderHardwareAddress(myMAC.toBytes()); |
| |
| // Ethernet Frame. |
| Ethernet ethReply = new Ethernet(); |
| ethReply.setSourceMACAddress(myMAC); |
| ethReply.setDestinationMACAddress(packet.getSourceMAC()); |
| ethReply.setEtherType(Ethernet.TYPE_ARP); |
| ethReply.setVlanID(packet.getVlanID()); |
| |
| ethReply.setPayload(arpReply); |
| sendReply(context, ethReply); |
| } |
| |
| /** |
| * Integrates hosts learned through DHCP into topology. |
| * @param context context of the incoming message |
| * @param ipAssigned IP Address assigned to the host by DHCP Manager |
| */ |
| private void discoverHost(PacketContext context, Ip4Address ipAssigned) { |
| Ethernet packet = context.inPacket().parsed(); |
| MacAddress mac = packet.getSourceMAC(); |
| VlanId vlanId = VlanId.vlanId(packet.getVlanID()); |
| HostLocation hostLocation = new HostLocation(context.inPacket().receivedFrom(), 0); |
| |
| Set<IpAddress> ips = new HashSet<>(); |
| ips.add(ipAssigned); |
| |
| HostId hostId = HostId.hostId(mac, vlanId); |
| DefaultHostDescription desc = new DefaultHostDescription(mac, vlanId, hostLocation, ips); |
| hostProviderService.hostDetected(hostId, desc, false); |
| } |
| |
| |
| @Override |
| public void process(PacketContext context) { |
| Ethernet packet = context.inPacket().parsed(); |
| if (packet == null) { |
| return; |
| } |
| |
| if (packet.getEtherType() == Ethernet.TYPE_IPV4) { |
| IPv4 ipv4Packet = (IPv4) packet.getPayload(); |
| |
| if (ipv4Packet.getProtocol() == IPv4.PROTOCOL_UDP) { |
| UDP udpPacket = (UDP) ipv4Packet.getPayload(); |
| |
| if (udpPacket.getDestinationPort() == UDP.DHCP_SERVER_PORT && |
| udpPacket.getSourcePort() == UDP.DHCP_CLIENT_PORT) { |
| // This is meant for the dhcp server so process the packet here. |
| |
| DHCP dhcpPayload = (DHCP) udpPacket.getPayload(); |
| processDhcpPacket(context, dhcpPayload); |
| } |
| } |
| } else if (packet.getEtherType() == Ethernet.TYPE_ARP) { |
| ARP arpPacket = (ARP) packet.getPayload(); |
| |
| if ((arpPacket.getOpCode() == ARP.OP_REQUEST) && |
| Objects.equals(myIP, Ip4Address.valueOf(arpPacket.getTargetProtocolAddress()))) { |
| |
| processArpPacket(context, packet); |
| |
| } |
| } |
| } |
| } |
| |
| private class InternalConfigListener implements NetworkConfigListener { |
| |
| /** |
| * Reconfigures the DHCP Server according to the configuration parameters passed. |
| * |
| * @param cfg configuration object |
| */ |
| private void reconfigureNetwork(DhcpConfig cfg) { |
| if (cfg == null) { |
| return; |
| } |
| if (cfg.ip() != null) { |
| myIP = cfg.ip(); |
| } |
| if (cfg.mac() != null) { |
| myMAC = cfg.mac(); |
| } |
| if (cfg.subnetMask() != null) { |
| subnetMask = cfg.subnetMask(); |
| } |
| if (cfg.broadcastAddress() != null) { |
| broadcastAddress = cfg.broadcastAddress(); |
| } |
| if (cfg.routerAddress() != null) { |
| routerAddress = cfg.routerAddress(); |
| } |
| if (cfg.domainServer() != null) { |
| domainServer = cfg.domainServer(); |
| } |
| if (cfg.ttl() != -1) { |
| packetTTL = (byte) cfg.ttl(); |
| } |
| if (cfg.leaseTime() != -1) { |
| leaseTime = cfg.leaseTime(); |
| } |
| if (cfg.renewTime() != -1) { |
| renewalTime = cfg.renewTime(); |
| } |
| if (cfg.rebindTime() != -1) { |
| rebindingTime = cfg.rebindTime(); |
| } |
| if (cfg.defaultTimeout() != -1) { |
| dhcpStore.setDefaultTimeoutForPurge(cfg.defaultTimeout()); |
| } |
| if (cfg.timerDelay() != -1) { |
| timerDelay = cfg.timerDelay(); |
| } |
| if ((cfg.startIp() != null) && (cfg.endIp() != null)) { |
| dhcpStore.populateIPPoolfromRange(cfg.startIp(), cfg.endIp()); |
| } |
| } |
| |
| |
| @Override |
| public void event(NetworkConfigEvent event) { |
| |
| if ((event.type() == NetworkConfigEvent.Type.CONFIG_ADDED || |
| event.type() == NetworkConfigEvent.Type.CONFIG_UPDATED) && |
| event.configClass().equals(DhcpConfig.class)) { |
| |
| DhcpConfig cfg = cfgService.getConfig(appId, DhcpConfig.class); |
| reconfigureNetwork(cfg); |
| log.info("Reconfigured"); |
| } |
| } |
| } |
| |
| private class InternalHostProvider extends AbstractProvider implements HostProvider { |
| |
| /** |
| * Creates a provider with the supplier identifier. |
| */ |
| protected InternalHostProvider() { |
| super(PID); |
| } |
| |
| @Override |
| public void triggerProbe(Host host) { |
| // nothing to do |
| } |
| } |
| |
| private class PurgeListTask implements TimerTask { |
| |
| @Override |
| public void run(Timeout to) { |
| IpAssignment ipAssignment; |
| Date dateNow = new Date(); |
| |
| Map<HostId, IpAssignment> ipAssignmentMap = dhcpStore.listAllMapping(); |
| for (Map.Entry<HostId, IpAssignment> entry: ipAssignmentMap.entrySet()) { |
| ipAssignment = entry.getValue(); |
| |
| long timeLapsed = dateNow.getTime() - ipAssignment.timestamp().getTime(); |
| if ((ipAssignment.assignmentStatus() != IpAssignment.AssignmentStatus.Option_Expired) && |
| (ipAssignment.leasePeriod() > 0) && (timeLapsed > (ipAssignment.leasePeriodMs()))) { |
| |
| Ip4Address ip4Address = dhcpStore.releaseIP(entry.getKey()); |
| if (ip4Address != null) { |
| hostProviderService.removeIpFromHost(entry.getKey(), ipAssignment.ipAddress()); |
| } |
| } |
| } |
| timeout = Timer.getTimer().newTimeout(new PurgeListTask(), timerDelay, TimeUnit.MINUTES); |
| } |
| } |
| } |