| /* |
| * 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.pim.impl; |
| |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.PIM; |
| import org.onlab.packet.VlanId; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.incubator.net.intf.Interface; |
| import org.onosproject.net.ConnectPoint; |
| 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.packet.DefaultOutboundPacket; |
| import org.onosproject.net.packet.InboundPacket; |
| import org.onosproject.net.packet.OutboundPacket; |
| 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.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Handing Incoming and outgoing PIM packets. |
| */ |
| public final class PIMPacketHandler { |
| private final Logger log = getLogger(getClass()); |
| |
| private static PIMPacketHandler instance = null; |
| |
| private PacketService packetService; |
| private PIMPacketProcessor processor = new PIMPacketProcessor(); |
| private MacAddress pimDestinationMac = MacAddress.valueOf("01:00:5E:00:00:0d"); |
| |
| // Utility class |
| private PIMPacketHandler() {} |
| |
| public static PIMPacketHandler getInstance() { |
| if (null == instance) { |
| instance = new PIMPacketHandler(); |
| } |
| return instance; |
| } |
| |
| /** |
| * Initialize the packet handling service. |
| * |
| * @param ps the packetService |
| * @param appId our application ID |
| */ |
| public void initialize(PacketService ps, ApplicationId appId) { |
| packetService = ps; |
| |
| // Build a traffic selector for all multicast traffic |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| selector.matchEthType(Ethernet.TYPE_IPV4); |
| selector.matchIPProtocol(IPv4.PROTOCOL_PIM); |
| packetService.requestPackets(selector.build(), PacketPriority.REACTIVE, appId); |
| |
| packetService.addProcessor(processor, PacketProcessor.director(1)); |
| } |
| |
| /** |
| * Shutdown the packet handling service. |
| */ |
| public void stop() { |
| packetService.removeProcessor(processor); |
| processor = null; |
| } |
| |
| /** |
| * Packet processor responsible for handling IGMP packets. |
| */ |
| public class PIMPacketProcessor implements PacketProcessor { |
| private final Logger log = getLogger(getClass()); |
| |
| @Override |
| public void process(PacketContext context) { |
| // Stop processing if the packet has been handled, since we |
| // can't do any more to it. |
| if (context.isHandled()) { |
| return; |
| } |
| |
| InboundPacket pkt = context.inPacket(); |
| if (pkt == null) { |
| return; |
| } |
| |
| Ethernet ethPkt = pkt.parsed(); |
| if (ethPkt == null) { |
| return; |
| } |
| |
| /* |
| * IPv6 MLD packets are handled by ICMP6. We'll only deal |
| * with IPv4. |
| */ |
| if (ethPkt.getEtherType() != Ethernet.TYPE_IPV4) { |
| return; |
| } |
| |
| IPv4 ip = (IPv4) ethPkt.getPayload(); |
| IpAddress gaddr = IpAddress.valueOf(ip.getDestinationAddress()); |
| IpAddress saddr = Ip4Address.valueOf(ip.getSourceAddress()); |
| log.debug("Packet (" + saddr.toString() + ", " + gaddr.toString() + |
| "\tingress port: " + context.inPacket().receivedFrom().toString()); |
| |
| if (ip.getProtocol() != IPv4.PROTOCOL_PIM) { |
| log.debug("PIM Picked up a non PIM packet: IP protocol: " + ip.getProtocol()); |
| return; |
| } |
| |
| // TODO: check incoming to be PIM.PIM_ADDRESS or "Our" address. |
| IpPrefix spfx = IpPrefix.valueOf(saddr, 32); |
| IpPrefix gpfx = IpPrefix.valueOf(gaddr, 32); |
| |
| PIM pim = (PIM) ip.getPayload(); |
| switch (pim.getPimMsgType()) { |
| |
| case PIM.TYPE_HELLO: |
| processHello(ethPkt, context.inPacket().receivedFrom()); |
| break; |
| |
| case PIM.TYPE_JOIN_PRUNE_REQUEST: |
| // Create the function |
| break; |
| |
| case PIM.TYPE_ASSERT: |
| case PIM.TYPE_BOOTSTRAP: |
| case PIM.TYPE_CANDIDATE_RP_ADV: |
| case PIM.TYPE_GRAFT: |
| case PIM.TYPE_GRAFT_ACK: |
| case PIM.TYPE_REGISTER: |
| case PIM.TYPE_REGISTER_STOP: |
| log.debug("Unsupported PIM message type: " + pim.getPimMsgType()); |
| break; |
| |
| default: |
| log.debug("Unkown PIM message type: " + pim.getPimMsgType()); |
| break; |
| } |
| } |
| |
| /** |
| * Process incoming hello message, we will need the Macaddress and IP address of the sender. |
| * |
| * @param ethPkt the ethernet header |
| * @param receivedFrom the connect point we recieved this message from |
| */ |
| private void processHello(Ethernet ethPkt, ConnectPoint receivedFrom) { |
| checkNotNull(ethPkt); |
| checkNotNull(receivedFrom); |
| |
| // It is a problem if we don't have the |
| PIMInterfaces pintfs = PIMInterfaces.getInstance(); |
| PIMInterface intf = pintfs.getInterface(receivedFrom); |
| if (intf == null) { |
| log.error("We received a PIM message on an interface we were not supposed to"); |
| return; |
| } |
| intf.processHello(ethPkt, receivedFrom); |
| } |
| } |
| |
| // Create an ethernet header and serialize then send |
| public void sendPacket(PIM pim, PIMInterface pimIntf) { |
| |
| Interface theInterface = pimIntf.getInterface(); |
| |
| // Create the ethernet packet |
| Ethernet eth = new Ethernet(); |
| eth.setDestinationMACAddress(pimDestinationMac); |
| eth.setSourceMACAddress(theInterface.mac()); |
| eth.setEtherType(Ethernet.TYPE_IPV4); |
| if (theInterface.vlan() != VlanId.NONE) { |
| eth.setVlanID(theInterface.vlan().toShort()); |
| } |
| |
| // Create the IP Packet |
| IPv4 ip = new IPv4(); |
| ip.setVersion((byte) 4); |
| ip.setTtl((byte) 20); |
| ip.setProtocol(IPv4.PROTOCOL_PIM); |
| ip.setChecksum((short) 0); |
| ip.setSourceAddress(checkNotNull(pimIntf.getIpAddress()).getIp4Address().toInt()); |
| ip.setDestinationAddress(PIM.PIM_ADDRESS.getIp4Address().toInt()); |
| eth.setPayload(ip); |
| ip.setParent(eth); |
| |
| // Now set pim |
| ip.setPayload(pim); |
| pim.setParent(ip); |
| |
| ConnectPoint cp = theInterface.connectPoint(); |
| checkNotNull(cp); |
| |
| TrafficTreatment treat = DefaultTrafficTreatment.builder().setOutput(cp.port()).build(); |
| ByteBuffer bb = ByteBuffer.wrap(eth.serialize()); |
| OutboundPacket packet = new DefaultOutboundPacket(cp.deviceId(), treat, bb); |
| checkNotNull(packet); |
| |
| packetService.emit(packet); |
| } |
| } |