/**
   * Constructs a BGP intent and put it into the intentList.
   *
   * <p>The purpose of this method is too simplify the setUpBgpIntents() method, and to make the
   * setUpBgpIntents() easy to read.
   *
   * @param srcVlanId ingress VlanId
   * @param dstVlanId egress VlanId
   * @param srcPrefix source IP prefix to match
   * @param dstPrefix destination IP prefix to match
   * @param srcTcpPort source TCP port to match
   * @param dstTcpPort destination TCP port to match
   * @param srcConnectPoint source connect point for PointToPointIntent
   * @param dstConnectPoint destination connect point for PointToPointIntent
   */
  private void bgpPathintentConstructor(
      VlanId srcVlanId,
      VlanId dstVlanId,
      String srcPrefix,
      String dstPrefix,
      Short srcTcpPort,
      Short dstTcpPort,
      ConnectPoint srcConnectPoint,
      ConnectPoint dstConnectPoint) {

    TrafficSelector.Builder builder =
        DefaultTrafficSelector.builder()
            .matchEthType(Ethernet.TYPE_IPV4)
            .matchIPProtocol(IPv4.PROTOCOL_TCP)
            .matchIPSrc(IpPrefix.valueOf(srcPrefix))
            .matchIPDst(IpPrefix.valueOf(dstPrefix));

    if (!srcVlanId.equals(VlanId.NONE)) {
      builder.matchVlanId(srcVlanId);
    }

    TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();

    if (!dstVlanId.equals(VlanId.NONE)) {
      treatment.setVlanId(dstVlanId);
    }

    if (srcTcpPort != null) {
      builder.matchTcpSrc(TpPort.tpPort(srcTcpPort));
    }
    if (dstTcpPort != null) {
      builder.matchTcpDst(TpPort.tpPort(dstTcpPort));
    }

    Key key =
        Key.of(
            srcPrefix.split("/")[0]
                + "-"
                + dstPrefix.split("/")[0]
                + "-"
                + ((srcTcpPort == null) ? "dst" : "src"),
            APPID);

    PointToPointIntent intent =
        PointToPointIntent.builder()
            .appId(APPID)
            .key(key)
            .selector(builder.build())
            .treatment(treatment.build())
            .ingressPoint(srcConnectPoint)
            .egressPoint(dstConnectPoint)
            .build();

    intentList.add(intent);
  }
예제 #2
0
파일: SdnIpFib.java 프로젝트: Mohdrz/Onos
  /**
   * Generates a route intent for a prefix, the next hop IP address, and the next hop MAC address.
   *
   * <p>This method will find the egress interface for the intent. Intent will match dst IP prefix
   * and rewrite dst MAC address at all other border switches, then forward packets according to dst
   * MAC address.
   *
   * @param prefix IP prefix of the route to add
   * @param nextHopIpAddress IP address of the next hop
   * @param nextHopMacAddress MAC address of the next hop
   * @return the generated intent, or null if no intent should be submitted
   */
  private MultiPointToSinglePointIntent generateRouteIntent(
      IpPrefix prefix, IpAddress nextHopIpAddress, MacAddress nextHopMacAddress) {

    // Find the attachment point (egress interface) of the next hop
    Interface egressInterface = interfaceService.getMatchingInterface(nextHopIpAddress);
    if (egressInterface == null) {
      log.warn("No outgoing interface found for {}", nextHopIpAddress);
      return null;
    }

    // Generate the intent itself
    Set<ConnectPoint> ingressPorts = new HashSet<>();
    ConnectPoint egressPort = egressInterface.connectPoint();
    log.debug("Generating intent for prefix {}, next hop mac {}", prefix, nextHopMacAddress);

    for (Interface intf : interfaceService.getInterfaces()) {
      // TODO this should be only peering interfaces
      if (!intf.connectPoint().equals(egressInterface.connectPoint())) {
        ConnectPoint srcPort = intf.connectPoint();
        ingressPorts.add(srcPort);
      }
    }

    // Match the destination IP prefix at the first hop
    TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
    if (prefix.isIp4()) {
      selector.matchEthType(Ethernet.TYPE_IPV4);
      // if it is default route, then we do not need match destination
      // IP address
      if (prefix.prefixLength() != 0) {
        selector.matchIPDst(prefix);
      }
    } else {
      selector.matchEthType(Ethernet.TYPE_IPV6);
      // if it is default route, then we do not need match destination
      // IP address
      if (prefix.prefixLength() != 0) {
        selector.matchIPv6Dst(prefix);
      }
    }

    // Rewrite the destination MAC address
    TrafficTreatment.Builder treatment =
        DefaultTrafficTreatment.builder().setEthDst(nextHopMacAddress);
    if (!egressInterface.vlan().equals(VlanId.NONE)) {
      treatment.setVlanId(egressInterface.vlan());
      // If we set VLAN ID, we have to make sure a VLAN tag exists.
      // TODO support no VLAN -> VLAN routing
      selector.matchVlanId(VlanId.ANY);
    }

    int priority = prefix.prefixLength() * PRIORITY_MULTIPLIER + PRIORITY_OFFSET;
    Key key = Key.of(prefix.toString(), appId);
    return MultiPointToSinglePointIntent.builder()
        .appId(appId)
        .key(key)
        .selector(selector.build())
        .treatment(treatment.build())
        .ingressPoints(ingressPorts)
        .egressPoint(egressPort)
        .priority(priority)
        .constraints(CONSTRAINTS)
        .build();
  }