Beispiel #1
0
  private void sendPacketOut(ConnectPoint outport, Ethernet payload, int sid) {

    IPv4 ipPacket = (IPv4) payload.getPayload();
    Ip4Address destIpAddress = Ip4Address.valueOf(ipPacket.getDestinationAddress());

    if (sid == -1
        || config.getSegmentId(payload.getDestinationMAC()) == sid
        || config.inSameSubnet(outport.deviceId(), destIpAddress)) {
      TrafficTreatment treatment =
          DefaultTrafficTreatment.builder().setOutput(outport.port()).build();
      OutboundPacket packet =
          new DefaultOutboundPacket(
              outport.deviceId(), treatment, ByteBuffer.wrap(payload.serialize()));
      srManager.packetService.emit(packet);
    } else {
      log.info("Send a MPLS packet as a ICMP response");
      TrafficTreatment treatment =
          DefaultTrafficTreatment.builder().setOutput(outport.port()).build();

      payload.setEtherType(Ethernet.MPLS_UNICAST);
      MPLS mplsPkt = new MPLS();
      mplsPkt.setLabel(sid);
      mplsPkt.setTtl(((IPv4) payload.getPayload()).getTtl());
      mplsPkt.setPayload(payload.getPayload());
      payload.setPayload(mplsPkt);

      OutboundPacket packet =
          new DefaultOutboundPacket(
              outport.deviceId(), treatment, ByteBuffer.wrap(payload.serialize()));

      srManager.packetService.emit(packet);
    }
  }
 @Override
 public InboundPacket inPacket() {
   IPv4 ipv4 = new IPv4();
   ipv4.setDestinationAddress("10.0.0.1");
   ipv4.setSourceAddress(IP_ADDRESS.toString());
   Ethernet eth = new Ethernet();
   eth.setEtherType(Ethernet.TYPE_IPV4)
       .setVlanID(VLAN.toShort())
       .setSourceMACAddress(MAC)
       .setDestinationMACAddress(MacAddress.valueOf("00:00:00:00:00:01"))
       .setPayload(ipv4);
   ConnectPoint receivedFrom = new ConnectPoint(deviceId(deviceId), portNumber(INPORT));
   return new DefaultInboundPacket(receivedFrom, eth, ByteBuffer.wrap(eth.serialize()));
 }
  private void transformAndSend(IPv4 ipv4, Interface egressInterface, MacAddress macAddress) {

    Ethernet eth = new Ethernet();
    eth.setDestinationMACAddress(macAddress);
    eth.setSourceMACAddress(egressInterface.mac());
    eth.setEtherType(EthType.EtherType.IPV4.ethType().toShort());
    eth.setPayload(ipv4);
    if (!egressInterface.vlan().equals(VlanId.NONE)) {
      eth.setVlanID(egressInterface.vlan().toShort());
    }

    ipv4.setTtl((byte) (ipv4.getTtl() - 1));
    ipv4.setChecksum((short) 0);

    send(eth, egressInterface.connectPoint());
  }
  private void handle(Ethernet eth) {
    checkNotNull(eth);

    if (!(eth.getEtherType() == EthType.EtherType.IPV4.ethType().toShort())) {
      return;
    }

    IPv4 ipv4 = (IPv4) eth.getPayload().clone();

    Ip4Address dstIp = Ip4Address.valueOf(ipv4.getDestinationAddress());

    Interface egressInterface = interfaceService.getMatchingInterface(dstIp);

    if (egressInterface == null) {
      log.info("No egress interface found for {}", dstIp);
      return;
    }

    Optional<Host> host =
        hostService
            .getHostsByIp(dstIp)
            .stream()
            .filter(h -> h.location().equals(egressInterface.connectPoint()))
            .filter(h -> h.vlan().equals(egressInterface.vlan()))
            .findAny();

    if (host.isPresent()) {
      transformAndSend(ipv4, egressInterface, host.get().mac());
    } else {
      hostService.startMonitoringIp(dstIp);
      ipPacketCache
          .asMap()
          .compute(
              dstIp,
              (ip, queue) -> {
                if (queue == null) {
                  queue = new ConcurrentLinkedQueue();
                }
                queue.add(ipv4);
                return queue;
              });
    }
  }
Beispiel #5
0
  /**
   * Process incoming ICMP packet. If it is an ICMP request to router or known host, then sends an
   * ICMP response. If it is an ICMP packet to known host and forward the packet to the host. If it
   * is an ICMP packet to unknown host in a subnet, then sends an ARP request to the subnet.
   *
   * @param pkt inbound packet
   */
  public void processPacketIn(InboundPacket pkt) {

    Ethernet ethernet = pkt.parsed();
    IPv4 ipv4 = (IPv4) ethernet.getPayload();

    ConnectPoint connectPoint = pkt.receivedFrom();
    DeviceId deviceId = connectPoint.deviceId();
    Ip4Address destinationAddress = Ip4Address.valueOf(ipv4.getDestinationAddress());
    Set<Ip4Address> gatewayIpAddresses = config.getPortIPs(deviceId);
    Ip4Address routerIp;
    try {
      routerIp = config.getRouterIp(deviceId);
    } catch (DeviceConfigNotFoundException e) {
      log.warn(e.getMessage() + " Aborting processPacketIn.");
      return;
    }
    IpPrefix routerIpPrefix = IpPrefix.valueOf(routerIp, IpPrefix.MAX_INET_MASK_LENGTH);
    Ip4Address routerIpAddress = routerIpPrefix.getIp4Prefix().address();

    // ICMP to the router IP or gateway IP
    if (((ICMP) ipv4.getPayload()).getIcmpType() == ICMP.TYPE_ECHO_REQUEST
        && (destinationAddress.equals(routerIpAddress)
            || gatewayIpAddresses.contains(destinationAddress))) {
      sendICMPResponse(ethernet, connectPoint);

      // ICMP for any known host
    } else if (!srManager.hostService.getHostsByIp(destinationAddress).isEmpty()) {
      // TODO: known host packet should not be coming to controller - resend flows?
      srManager.ipHandler.forwardPackets(deviceId, destinationAddress);

      // ICMP for an unknown host in the subnet of the router
    } else if (config.inSameSubnet(deviceId, destinationAddress)) {
      srManager.arpHandler.sendArpRequest(deviceId, destinationAddress, connectPoint);

      // ICMP for an unknown host
    } else {
      log.debug("ICMP request for unknown host {} ", destinationAddress);
      // Do nothing
    }
  }
  // Install a rule forwarding the packet to the specified port.
  private void installRule(PacketContext context, PortNumber portNumber) {
    //
    // We don't support (yet) buffer IDs in the Flow Service so
    // packet out first.
    //
    Ethernet inPkt = context.inPacket().parsed();
    TrafficSelector.Builder selectorBuilder = DefaultTrafficSelector.builder();

    // If PacketOutOnly or ARP packet than forward directly to output port
    if (packetOutOnly || inPkt.getEtherType() == Ethernet.TYPE_ARP) {
      packetOut(context, portNumber);
      return;
    }

    //
    // If matchDstMacOnly
    //    Create flows matching dstMac only
    // Else
    //    Create flows with default matching and include configured fields
    //
    if (matchDstMacOnly) {
      selectorBuilder.matchEthDst(inPkt.getDestinationMAC());
    } else {
      selectorBuilder
          .matchInPort(context.inPacket().receivedFrom().port())
          .matchEthSrc(inPkt.getSourceMAC())
          .matchEthDst(inPkt.getDestinationMAC());

      // If configured Match Vlan ID
      if (matchVlanId && inPkt.getVlanID() != Ethernet.VLAN_UNTAGGED) {
        selectorBuilder.matchVlanId(VlanId.vlanId(inPkt.getVlanID()));
      }

      //
      // If configured and EtherType is IPv4 - Match IPv4 and
      // TCP/UDP/ICMP fields
      //
      if (matchIpv4Address && inPkt.getEtherType() == Ethernet.TYPE_IPV4) {
        IPv4 ipv4Packet = (IPv4) inPkt.getPayload();
        byte ipv4Protocol = ipv4Packet.getProtocol();
        Ip4Prefix matchIp4SrcPrefix =
            Ip4Prefix.valueOf(ipv4Packet.getSourceAddress(), Ip4Prefix.MAX_MASK_LENGTH);
        Ip4Prefix matchIp4DstPrefix =
            Ip4Prefix.valueOf(ipv4Packet.getDestinationAddress(), Ip4Prefix.MAX_MASK_LENGTH);
        selectorBuilder
            .matchEthType(Ethernet.TYPE_IPV4)
            .matchIPSrc(matchIp4SrcPrefix)
            .matchIPDst(matchIp4DstPrefix);

        if (matchIpv4Dscp) {
          byte dscp = ipv4Packet.getDscp();
          byte ecn = ipv4Packet.getEcn();
          selectorBuilder.matchIPDscp(dscp).matchIPEcn(ecn);
        }

        if (matchTcpUdpPorts && ipv4Protocol == IPv4.PROTOCOL_TCP) {
          TCP tcpPacket = (TCP) ipv4Packet.getPayload();
          selectorBuilder
              .matchIPProtocol(ipv4Protocol)
              .matchTcpSrc(tcpPacket.getSourcePort())
              .matchTcpDst(tcpPacket.getDestinationPort());
        }
        if (matchTcpUdpPorts && ipv4Protocol == IPv4.PROTOCOL_UDP) {
          UDP udpPacket = (UDP) ipv4Packet.getPayload();
          selectorBuilder
              .matchIPProtocol(ipv4Protocol)
              .matchUdpSrc(udpPacket.getSourcePort())
              .matchUdpDst(udpPacket.getDestinationPort());
        }
        if (matchIcmpFields && ipv4Protocol == IPv4.PROTOCOL_ICMP) {
          ICMP icmpPacket = (ICMP) ipv4Packet.getPayload();
          selectorBuilder
              .matchIPProtocol(ipv4Protocol)
              .matchIcmpType(icmpPacket.getIcmpType())
              .matchIcmpCode(icmpPacket.getIcmpCode());
        }
      }

      //
      // If configured and EtherType is IPv6 - Match IPv6 and
      // TCP/UDP/ICMP fields
      //
      if (matchIpv6Address && inPkt.getEtherType() == Ethernet.TYPE_IPV6) {
        IPv6 ipv6Packet = (IPv6) inPkt.getPayload();
        byte ipv6NextHeader = ipv6Packet.getNextHeader();
        Ip6Prefix matchIp6SrcPrefix =
            Ip6Prefix.valueOf(ipv6Packet.getSourceAddress(), Ip6Prefix.MAX_MASK_LENGTH);
        Ip6Prefix matchIp6DstPrefix =
            Ip6Prefix.valueOf(ipv6Packet.getDestinationAddress(), Ip6Prefix.MAX_MASK_LENGTH);
        selectorBuilder
            .matchEthType(Ethernet.TYPE_IPV6)
            .matchIPv6Src(matchIp6SrcPrefix)
            .matchIPv6Dst(matchIp6DstPrefix);

        if (matchIpv6FlowLabel) {
          selectorBuilder.matchIPv6FlowLabel(ipv6Packet.getFlowLabel());
        }

        if (matchTcpUdpPorts && ipv6NextHeader == IPv6.PROTOCOL_TCP) {
          TCP tcpPacket = (TCP) ipv6Packet.getPayload();
          selectorBuilder
              .matchIPProtocol(ipv6NextHeader)
              .matchTcpSrc(tcpPacket.getSourcePort())
              .matchTcpDst(tcpPacket.getDestinationPort());
        }
        if (matchTcpUdpPorts && ipv6NextHeader == IPv6.PROTOCOL_UDP) {
          UDP udpPacket = (UDP) ipv6Packet.getPayload();
          selectorBuilder
              .matchIPProtocol(ipv6NextHeader)
              .matchUdpSrc(udpPacket.getSourcePort())
              .matchUdpDst(udpPacket.getDestinationPort());
        }
        if (matchIcmpFields && ipv6NextHeader == IPv6.PROTOCOL_ICMP6) {
          ICMP6 icmp6Packet = (ICMP6) ipv6Packet.getPayload();
          selectorBuilder
              .matchIPProtocol(ipv6NextHeader)
              .matchIcmpv6Type(icmp6Packet.getIcmpType())
              .matchIcmpv6Code(icmp6Packet.getIcmpCode());
        }
      }
    }
    TrafficTreatment treatment = DefaultTrafficTreatment.builder().setOutput(portNumber).build();

    ForwardingObjective forwardingObjective =
        DefaultForwardingObjective.builder()
            .withSelector(selectorBuilder.build())
            .withTreatment(treatment)
            .withPriority(flowPriority)
            .withFlag(ForwardingObjective.Flag.VERSATILE)
            .fromApp(appId)
            .makeTemporary(flowTimeout)
            .add();

    flowObjectiveService.forward(context.inPacket().receivedFrom().deviceId(), forwardingObjective);

    //
    // If packetOutOfppTable
    //  Send packet back to the OpenFlow pipeline to match installed flow
    // Else
    //  Send packet direction on the appropriate port
    //
    if (packetOutOfppTable) {
      packetOut(context, PortNumber.TABLE);
    } else {
      packetOut(context, portNumber);
    }
  }
Beispiel #7
0
  /**
   * Sends an ICMP reply message.
   *
   * <p>Note: we assume that packets sending from the edge switches to the hosts have untagged VLAN.
   *
   * @param icmpRequest the original ICMP request
   * @param outport the output port where the ICMP reply should be sent to
   */
  private void sendICMPResponse(Ethernet icmpRequest, ConnectPoint outport) {
    // Note: We assume that packets arrive at the edge switches have
    // untagged VLAN.
    Ethernet icmpReplyEth = new Ethernet();

    IPv4 icmpRequestIpv4 = (IPv4) icmpRequest.getPayload();
    IPv4 icmpReplyIpv4 = new IPv4();

    int destAddress = icmpRequestIpv4.getDestinationAddress();
    icmpReplyIpv4.setDestinationAddress(icmpRequestIpv4.getSourceAddress());
    icmpReplyIpv4.setSourceAddress(destAddress);
    icmpReplyIpv4.setTtl((byte) 64);
    icmpReplyIpv4.setChecksum((short) 0);

    ICMP icmpReply = new ICMP();
    icmpReply.setPayload(((ICMP) icmpRequestIpv4.getPayload()).getPayload());
    icmpReply.setIcmpType(ICMP.TYPE_ECHO_REPLY);
    icmpReply.setIcmpCode(ICMP.SUBTYPE_ECHO_REPLY);
    icmpReply.setChecksum((short) 0);
    icmpReplyIpv4.setPayload(icmpReply);

    icmpReplyEth.setPayload(icmpReplyIpv4);
    icmpReplyEth.setEtherType(Ethernet.TYPE_IPV4);
    icmpReplyEth.setDestinationMACAddress(icmpRequest.getSourceMACAddress());
    icmpReplyEth.setSourceMACAddress(icmpRequest.getDestinationMACAddress());

    Ip4Address destIpAddress = Ip4Address.valueOf(icmpReplyIpv4.getDestinationAddress());
    Ip4Address destRouterAddress = config.getRouterIpAddressForASubnetHost(destIpAddress);
    int sid = config.getSegmentId(destRouterAddress);
    if (sid < 0) {
      log.warn("Cannot find the Segment ID for {}", destAddress);
      return;
    }

    sendPacketOut(outport, icmpReplyEth, sid);
  }