@Override
  public List<CiscoVnmcControllerVO> listCiscoVnmcResources(ListCiscoVnmcResourcesCmd cmd) {
    Long physicalNetworkId = cmd.getPhysicalNetworkId();
    Long ciscoVnmcResourceId = cmd.getCiscoVnmcResourceId();
    List<CiscoVnmcControllerVO> responseList = new ArrayList<CiscoVnmcControllerVO>();

    if (physicalNetworkId == null && ciscoVnmcResourceId == null) {
      throw new InvalidParameterValueException(
          "Either physical network Id or vnmc device Id must be specified");
    }

    if (ciscoVnmcResourceId != null) {
      CiscoVnmcControllerVO ciscoVnmcResource = _ciscoVnmcDao.findById(ciscoVnmcResourceId);
      if (ciscoVnmcResource == null) {
        throw new InvalidParameterValueException(
            "Could not find Cisco Vnmc device with id: " + ciscoVnmcResource);
      }
      responseList.add(ciscoVnmcResource);
    } else {
      PhysicalNetworkVO physicalNetwork = _physicalNetworkDao.findById(physicalNetworkId);
      if (physicalNetwork == null) {
        throw new InvalidParameterValueException(
            "Could not find a physical network with id: " + physicalNetworkId);
      }
      responseList = _ciscoVnmcDao.listByPhysicalNetwork(physicalNetworkId);
    }

    return responseList;
  }
  @Override
  public boolean shutdown(Network network, ReservationContext context, boolean cleanup)
      throws ConcurrentOperationException, ResourceUnavailableException {

    unassignAsa1000vFromNetwork(network);

    String vlan = network.getBroadcastUri().getHost();
    long vlanId = Long.parseLong(vlan);
    List<CiscoVnmcControllerVO> devices =
        _ciscoVnmcDao.listByPhysicalNetwork(network.getPhysicalNetworkId());
    if (!devices.isEmpty()) {
      CiscoVnmcControllerVO ciscoVnmcDevice = devices.get(0);
      HostVO ciscoVnmcHost = _hostDao.findById(ciscoVnmcDevice.getHostId());
      cleanupLogicalEdgeFirewall(vlanId, ciscoVnmcHost.getId());
    }

    return true;
  }
  @Override
  public boolean applyStaticNats(Network network, List<? extends StaticNat> rules)
      throws ResourceUnavailableException {
    if (!_networkModel.isProviderSupportServiceInNetwork(
        network.getId(), Service.StaticNat, Provider.CiscoVnmc)) {
      s_logger.error(
          "Static NAT service is not provided by Cisco Vnmc device on network "
              + network.getName());
      return false;
    }

    // Find VNMC host for physical network
    List<CiscoVnmcControllerVO> devices =
        _ciscoVnmcDao.listByPhysicalNetwork(network.getPhysicalNetworkId());
    if (devices.isEmpty()) {
      s_logger.error("No Cisco Vnmc device on network " + network.getName());
      return true;
    }

    // Find if ASA 1000v is associated with network
    NetworkAsa1000vMapVO asaForNetwork = _networkAsa1000vMapDao.findByNetworkId(network.getId());
    if (asaForNetwork == null) {
      s_logger.debug("Cisco ASA 1000v device is not associated with network " + network.getName());
      return true;
    }

    if (network.getState() == Network.State.Allocated) {
      s_logger.debug(
          "External firewall was asked to apply static NAT rules for network with ID "
              + network.getId()
              + "; this network is not implemented. Skipping backend commands.");
      return true;
    }

    CiscoVnmcControllerVO ciscoVnmcDevice = devices.get(0);
    HostVO ciscoVnmcHost = _hostDao.findById(ciscoVnmcDevice.getHostId());

    List<StaticNatRuleTO> rulesTO = new ArrayList<StaticNatRuleTO>();
    for (StaticNat rule : rules) {
      IpAddress sourceIp = _networkModel.getIp(rule.getSourceIpAddressId());
      StaticNatRuleTO ruleTO =
          new StaticNatRuleTO(
              rule.getSourceIpAddressId(),
              sourceIp.getAddress().addr(),
              null,
              null,
              rule.getDestIpAddress(),
              null,
              null,
              null,
              rule.isForRevoke(),
              false);
      rulesTO.add(ruleTO);
    }

    if (!rulesTO.isEmpty()) {
      SetStaticNatRulesCommand cmd = new SetStaticNatRulesCommand(rulesTO, null);
      cmd.setContextParam(
          NetworkElementCommand.GUEST_VLAN_TAG, network.getBroadcastUri().getHost());
      cmd.setContextParam(NetworkElementCommand.GUEST_NETWORK_CIDR, network.getCidr());
      Answer answer = _agentMgr.easySend(ciscoVnmcHost.getId(), cmd);
      if (answer == null || !answer.getResult()) {
        String details = (answer != null) ? answer.getDetails() : "details unavailable";
        String msg =
            "Unable to apply static NAT rules to Cisco ASA 1000v appliance due to: "
                + details
                + ".";
        s_logger.error(msg);
        throw new ResourceUnavailableException(msg, DataCenter.class, network.getDataCenterId());
      }
    }

    return true;
  }
  @Override
  public CiscoVnmcController addCiscoVnmcResource(AddCiscoVnmcResourceCmd cmd) {
    String deviceName = Provider.CiscoVnmc.getName();
    NetworkDevice networkDevice = NetworkDevice.getNetworkDevice(deviceName);
    Long physicalNetworkId = cmd.getPhysicalNetworkId();
    CiscoVnmcController ciscoVnmcResource = null;

    PhysicalNetworkVO physicalNetwork = _physicalNetworkDao.findById(physicalNetworkId);
    if (physicalNetwork == null) {
      throw new InvalidParameterValueException(
          "Could not find phyical network with ID: " + physicalNetworkId);
    }
    long zoneId = physicalNetwork.getDataCenterId();

    PhysicalNetworkServiceProviderVO ntwkSvcProvider =
        _physicalNetworkServiceProviderDao.findByServiceProvider(
            physicalNetwork.getId(), networkDevice.getNetworkServiceProvder());
    if (ntwkSvcProvider == null) {
      throw new CloudRuntimeException(
          "Network Service Provider: "
              + networkDevice.getNetworkServiceProvder()
              + " is not enabled in the physical network: "
              + physicalNetworkId
              + "to add this device");
    } else if (ntwkSvcProvider.getState() == PhysicalNetworkServiceProvider.State.Shutdown) {
      throw new CloudRuntimeException(
          "Network Service Provider: "
              + ntwkSvcProvider.getProviderName()
              + " is in shutdown state in the physical network: "
              + physicalNetworkId
              + "to add this device");
    }

    if (_ciscoVnmcDao.listByPhysicalNetwork(physicalNetworkId).size() != 0) {
      throw new CloudRuntimeException(
          "A Cisco Vnmc device is already configured on this physical network");
    }

    Map<String, String> params = new HashMap<String, String>();
    params.put("guid", UUID.randomUUID().toString());
    params.put("zoneId", String.valueOf(physicalNetwork.getDataCenterId()));
    params.put("physicalNetworkId", String.valueOf(physicalNetwork.getId()));
    params.put("name", "Cisco VNMC Controller - " + cmd.getHost());
    params.put("ip", cmd.getHost());
    params.put("username", cmd.getUsername());
    params.put("password", cmd.getPassword());

    Map<String, Object> hostdetails = new HashMap<String, Object>();
    hostdetails.putAll(params);

    ServerResource resource = new CiscoVnmcResource();
    Transaction txn = Transaction.currentTxn();
    try {
      resource.configure(cmd.getHost(), hostdetails);

      Host host = _resourceMgr.addHost(zoneId, resource, Host.Type.ExternalFirewall, params);
      if (host != null) {
        txn.start();

        ciscoVnmcResource =
            new CiscoVnmcControllerVO(
                host.getId(), physicalNetworkId, ntwkSvcProvider.getProviderName(), deviceName);
        _ciscoVnmcDao.persist((CiscoVnmcControllerVO) ciscoVnmcResource);

        DetailVO detail =
            new DetailVO(host.getId(), "deviceid", String.valueOf(ciscoVnmcResource.getId()));
        _hostDetailsDao.persist(detail);

        txn.commit();
        return ciscoVnmcResource;
      } else {
        throw new CloudRuntimeException("Failed to add Cisco Vnmc device due to internal error.");
      }
    } catch (ConfigurationException e) {
      txn.rollback();
      throw new CloudRuntimeException(e.getMessage());
    }
  }
  @Override
  public boolean implement(
      Network network, NetworkOffering offering, DeployDestination dest, ReservationContext context)
      throws ConcurrentOperationException, ResourceUnavailableException,
          InsufficientCapacityException {
    DataCenter zone = _configMgr.getZone(network.getDataCenterId());

    if (zone.getNetworkType() == NetworkType.Basic) {
      s_logger.debug("Not handling network implement in zone of type " + NetworkType.Basic);
      return false;
    }

    if (!canHandle(network)) {
      return false;
    }

    List<CiscoVnmcControllerVO> devices =
        _ciscoVnmcDao.listByPhysicalNetwork(network.getPhysicalNetworkId());
    if (devices.isEmpty()) {
      s_logger.error("No Cisco Vnmc device on network " + network.getName());
      return false;
    }

    List<CiscoAsa1000vDeviceVO> asaList =
        _ciscoAsa1000vDao.listByPhysicalNetwork(network.getPhysicalNetworkId());
    if (asaList.isEmpty()) {
      s_logger.debug("No Cisco ASA 1000v device on network " + network.getName());
      return false;
    }

    NetworkAsa1000vMapVO asaForNetwork = _networkAsa1000vMapDao.findByNetworkId(network.getId());
    if (asaForNetwork != null) {
      s_logger.debug("Cisco ASA 1000v device already associated with network " + network.getName());
      return true;
    }

    if (!_networkModel.isProviderSupportServiceInNetwork(
        network.getId(), Service.SourceNat, Provider.CiscoVnmc)) {
      s_logger.error(
          "SourceNat service is not provided by Cisco Vnmc device on network " + network.getName());
      return false;
    }

    Transaction txn = Transaction.currentTxn();
    boolean status = false;
    try {
      txn.start();

      // ensure that there is an ASA 1000v assigned to this network
      CiscoAsa1000vDevice assignedAsa = assignAsa1000vToNetwork(network);
      if (assignedAsa == null) {
        s_logger.error("Unable to assign ASA 1000v device to network " + network.getName());
        return false;
      }

      ClusterVO asaCluster = _clusterDao.findById(assignedAsa.getClusterId());
      ClusterVSMMapVO clusterVsmMap = _clusterVsmMapDao.findByClusterId(assignedAsa.getClusterId());
      if (clusterVsmMap == null) {
        s_logger.error(
            "Vmware cluster "
                + asaCluster.getName()
                + " has no Cisco Nexus VSM device associated with it");
        return false;
      }

      CiscoNexusVSMDeviceVO vsmDevice = _vsmDeviceDao.findById(clusterVsmMap.getVsmId());
      if (vsmDevice == null) {
        s_logger.error(
            "Unable to load details of Cisco Nexus VSM device associated with cluster "
                + asaCluster.getName());
        return false;
      }

      CiscoVnmcControllerVO ciscoVnmcDevice = devices.get(0);
      HostVO ciscoVnmcHost = _hostDao.findById(ciscoVnmcDevice.getHostId());
      _hostDao.loadDetails(ciscoVnmcHost);
      Account owner = context.getAccount();
      PublicIp sourceNatIp = _ipAddrMgr.assignSourceNatIpAddressToGuestNetwork(owner, network);
      String vlan = network.getBroadcastUri().getHost();
      long vlanId = Long.parseLong(vlan);

      List<VlanVO> vlanVOList =
          _vlanDao.listVlansByPhysicalNetworkId(network.getPhysicalNetworkId());
      List<String> publicGateways = new ArrayList<String>();
      for (VlanVO vlanVO : vlanVOList) {
        publicGateways.add(vlanVO.getVlanGateway());
      }

      // due to VNMC limitation of not allowing source NAT ip as the outside ip of firewall,
      // an additional public ip needs to acquired for assigning as firewall outside ip.
      // In case there are already additional ip addresses available (network restart) use one
      // of them such that it is not the source NAT ip
      IpAddress outsideIp = null;
      List<IPAddressVO> publicIps = _ipAddressDao.listByAssociatedNetwork(network.getId(), null);
      for (IPAddressVO ip : publicIps) {
        if (!ip.isSourceNat()) {
          outsideIp = ip;
          break;
        }
      }
      if (outsideIp == null) { // none available, acquire one
        try {
          Account caller = CallContext.current().getCallingAccount();
          long callerUserId = CallContext.current().getCallingUserId();
          outsideIp = _ipAddrMgr.allocateIp(owner, false, caller, callerUserId, zone);
        } catch (ResourceAllocationException e) {
          s_logger.error("Unable to allocate additional public Ip address. Exception details " + e);
          return false;
        }

        try {
          outsideIp =
              _ipAddrMgr.associateIPToGuestNetwork(outsideIp.getId(), network.getId(), true);
        } catch (ResourceAllocationException e) {
          s_logger.error(
              "Unable to assign allocated additional public Ip "
                  + outsideIp.getAddress().addr()
                  + " to network with vlan "
                  + vlanId
                  + ". Exception details "
                  + e);
          return false;
        }
      }

      // create logical edge firewall in VNMC
      String gatewayNetmask = NetUtils.getCidrNetmask(network.getCidr());
      // due to ASA limitation of allowing single subnet to be assigned to firewall interfaces,
      // all public ip addresses must be from same subnet, this essentially means single public
      // subnet in zone
      if (!createLogicalEdgeFirewall(
          vlanId,
          network.getGateway(),
          gatewayNetmask,
          outsideIp.getAddress().addr(),
          sourceNatIp.getNetmask(),
          publicGateways,
          ciscoVnmcHost.getId())) {
        s_logger.error(
            "Failed to create logical edge firewall in Cisco VNMC device for network "
                + network.getName());
        return false;
      }

      // create stuff in VSM for ASA device
      if (!configureNexusVsmForAsa(
          vlanId,
          network.getGateway(),
          vsmDevice.getUserName(),
          vsmDevice.getPassword(),
          vsmDevice.getipaddr(),
          assignedAsa.getInPortProfile(),
          ciscoVnmcHost.getId())) {
        s_logger.error(
            "Failed to configure Cisco Nexus VSM "
                + vsmDevice.getipaddr()
                + " for ASA device for network "
                + network.getName());
        return false;
      }

      // configure source NAT
      if (!configureSourceNat(vlanId, network.getCidr(), sourceNatIp, ciscoVnmcHost.getId())) {
        s_logger.error(
            "Failed to configure source NAT in Cisco VNMC device for network " + network.getName());
        return false;
      }

      // associate Asa 1000v instance with logical edge firewall
      if (!associateAsaWithLogicalEdgeFirewall(
          vlanId, assignedAsa.getManagementIp(), ciscoVnmcHost.getId())) {
        s_logger.error(
            "Failed to associate Cisco ASA 1000v ("
                + assignedAsa.getManagementIp()
                + ") with logical edge firewall in VNMC for network "
                + network.getName());
        return false;
      }

      status = true;
      txn.commit();
    } finally {
      if (!status) {
        txn.rollback();
        // FIXME: also undo changes in VNMC, VSM if anything failed
      }
    }

    return true;
  }