NetworkServiceImpl.java

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 com.cloud.network;

import com.cloud.api.ApiDBUtils;
import com.cloud.configuration.Config;
import com.cloud.configuration.ConfigurationManager;
import com.cloud.configuration.Resource;
import com.cloud.dc.DataCenter;
import com.cloud.dc.DataCenter.NetworkType;
import com.cloud.dc.DataCenterVO;
import com.cloud.dc.DataCenterVnetVO;
import com.cloud.dc.Vlan.VlanType;
import com.cloud.dc.VlanVO;
import com.cloud.dc.dao.AccountVlanMapDao;
import com.cloud.dc.dao.DataCenterDao;
import com.cloud.dc.dao.DataCenterVnetDao;
import com.cloud.dc.dao.HostPodDao;
import com.cloud.dc.dao.VlanDao;
import com.cloud.deploy.DeployDestination;
import com.cloud.domain.Domain;
import com.cloud.domain.DomainVO;
import com.cloud.domain.dao.DomainDao;
import com.cloud.event.ActionEvent;
import com.cloud.event.EventTypes;
import com.cloud.event.UsageEventUtils;
import com.cloud.event.dao.EventDao;
import com.cloud.event.dao.UsageEventDao;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientAddressCapacityException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.InvalidParameterValueException;
import com.cloud.exception.PermissionDeniedException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.exception.UnsupportedServiceException;
import com.cloud.host.dao.HostDao;
import com.cloud.network.IpAddress.State;
import com.cloud.network.Network.Capability;
import com.cloud.network.Network.GuestType;
import com.cloud.network.Network.Provider;
import com.cloud.network.Network.Service;
import com.cloud.network.Networks.BroadcastDomainType;
import com.cloud.network.Networks.TrafficType;
import com.cloud.network.PhysicalNetwork.BroadcastDomainRange;
import com.cloud.network.VirtualRouterProvider.Type;
import com.cloud.network.addr.PublicIp;
import com.cloud.network.dao.AccountGuestVlanMapDao;
import com.cloud.network.dao.AccountGuestVlanMapVO;
import com.cloud.network.dao.FirewallRulesDao;
import com.cloud.network.dao.IPAddressDao;
import com.cloud.network.dao.IPAddressVO;
import com.cloud.network.dao.LoadBalancerVMMapDao;
import com.cloud.network.dao.NetworkDao;
import com.cloud.network.dao.NetworkDomainDao;
import com.cloud.network.dao.NetworkDomainVO;
import com.cloud.network.dao.NetworkServiceMapDao;
import com.cloud.network.dao.NetworkVO;
import com.cloud.network.dao.OvsProviderDao;
import com.cloud.network.dao.PhysicalNetworkDao;
import com.cloud.network.dao.PhysicalNetworkServiceProviderDao;
import com.cloud.network.dao.PhysicalNetworkServiceProviderVO;
import com.cloud.network.dao.PhysicalNetworkTrafficTypeDao;
import com.cloud.network.dao.PhysicalNetworkTrafficTypeVO;
import com.cloud.network.dao.PhysicalNetworkVO;
import com.cloud.network.element.NetworkElement;
import com.cloud.network.element.OvsProviderVO;
import com.cloud.network.element.VirtualRouterElement;
import com.cloud.network.element.VpcVirtualRouterElement;
import com.cloud.network.guru.NetworkGuru;
import com.cloud.network.lb.LoadBalancingRulesService;
import com.cloud.network.rules.FirewallRule.Purpose;
import com.cloud.network.rules.FirewallRuleVO;
import com.cloud.network.rules.RulesManager;
import com.cloud.network.rules.dao.PortForwardingRulesDao;
import com.cloud.network.security.SecurityGroupService;
import com.cloud.network.vpc.NetworkACL;
import com.cloud.network.vpc.PrivateIpVO;
import com.cloud.network.vpc.Vpc;
import com.cloud.network.vpc.VpcManager;
import com.cloud.network.vpc.dao.NetworkACLDao;
import com.cloud.network.vpc.dao.PrivateIpDao;
import com.cloud.network.vpc.dao.VpcDao;
import com.cloud.offering.NetworkOffering;
import com.cloud.offerings.NetworkOfferingVO;
import com.cloud.offerings.dao.NetworkOfferingDao;
import com.cloud.offerings.dao.NetworkOfferingServiceMapDao;
import com.cloud.org.Grouping;
import com.cloud.projects.Project;
import com.cloud.projects.ProjectManager;
import com.cloud.server.ResourceTag.ResourceObjectType;
import com.cloud.tags.ResourceTagVO;
import com.cloud.tags.dao.ResourceTagDao;
import com.cloud.user.Account;
import com.cloud.user.AccountManager;
import com.cloud.user.AccountVO;
import com.cloud.user.DomainManager;
import com.cloud.user.ResourceLimitService;
import com.cloud.user.User;
import com.cloud.user.UserVO;
import com.cloud.user.dao.AccountDao;
import com.cloud.user.dao.UserDao;
import com.cloud.utils.Journal;
import com.cloud.utils.NumbersUtil;
import com.cloud.utils.Pair;
import com.cloud.utils.StringUtils;
import com.cloud.utils.component.ManagerBase;
import com.cloud.utils.db.DB;
import com.cloud.utils.db.EntityManager;
import com.cloud.utils.db.Filter;
import com.cloud.utils.db.JoinBuilder;
import com.cloud.utils.db.QueryBuilder;
import com.cloud.utils.db.SearchBuilder;
import com.cloud.utils.db.SearchCriteria;
import com.cloud.utils.db.SearchCriteria.Op;
import com.cloud.utils.db.Transaction;
import com.cloud.utils.db.TransactionCallback;
import com.cloud.utils.db.TransactionCallbackNoReturn;
import com.cloud.utils.db.TransactionCallbackWithException;
import com.cloud.utils.db.TransactionLegacy;
import com.cloud.utils.db.TransactionStatus;
import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.utils.exception.ExceptionUtil;
import com.cloud.utils.net.NetUtils;
import com.cloud.vm.Nic;
import com.cloud.vm.NicSecondaryIp;
import com.cloud.vm.NicVO;
import com.cloud.vm.ReservationContext;
import com.cloud.vm.ReservationContextImpl;
import com.cloud.vm.SecondaryStorageVmVO;
import com.cloud.vm.UserVmVO;
import com.cloud.vm.VMInstanceVO;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.dao.NicDao;
import com.cloud.vm.dao.NicSecondaryIpDao;
import com.cloud.vm.dao.NicSecondaryIpVO;
import com.cloud.vm.dao.UserVmDao;
import com.cloud.vm.dao.VMInstanceDao;
import org.apache.cloudstack.acl.ControlledEntity.ACLType;
import org.apache.cloudstack.acl.SecurityChecker.AccessType;
import org.apache.cloudstack.api.command.admin.network.CreateNetworkCmdByAdmin;
import org.apache.cloudstack.api.command.admin.network.DedicateGuestVlanRangeCmd;
import org.apache.cloudstack.api.command.admin.network.ListDedicatedGuestVlanRangesCmd;
import org.apache.cloudstack.api.command.admin.usage.ListTrafficTypeImplementorsCmd;
import org.apache.cloudstack.api.command.user.network.CreateNetworkCmd;
import org.apache.cloudstack.api.command.user.network.ListNetworksCmd;
import org.apache.cloudstack.api.command.user.network.RestartNetworkCmd;
import org.apache.cloudstack.api.command.user.vm.ListNicsCmd;
import org.apache.cloudstack.context.CallContext;
import org.apache.cloudstack.engine.orchestration.service.NetworkOrchestrationService;
import org.apache.cloudstack.framework.config.dao.ConfigurationDao;
import org.apache.cloudstack.network.element.InternalLoadBalancerElementService;
import org.apache.log4j.Logger;

import javax.ejb.Local;
import javax.inject.Inject;
import javax.naming.ConfigurationException;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.URI;
import java.net.UnknownHostException;
import java.security.InvalidParameterException;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import java.util.UUID;

/**
 * NetworkServiceImpl implements NetworkService.
 */
@Local(value = {NetworkService.class})
public class NetworkServiceImpl extends ManagerBase implements  NetworkService {
    private static final Logger s_logger = Logger.getLogger(NetworkServiceImpl.class);

    private static final long MIN_VLAN_ID = 0L;
    private static final long MAX_VLAN_ID = 4095L; // 2^12 - 1
    private static final long MIN_GRE_KEY = 0L;
    private static final long MAX_GRE_KEY = 4294967295L; // 2^32 -1
    private static final long MIN_VXLAN_VNI = 0L;
    private static final long MAX_VXLAN_VNI = 16777214L; // 2^24 -2
    // MAX_VXLAN_VNI should be 16777215L (2^24-1), but Linux vxlan interface doesn't accept VNI:2^24-1 now.
    // It seems a bug.

    @Inject
    DataCenterDao _dcDao = null;
    @Inject
    VlanDao _vlanDao = null;
    @Inject
    IPAddressDao _ipAddressDao = null;
    @Inject
    AccountDao _accountDao = null;
    @Inject
    DomainDao _domainDao = null;
    @Inject
    UserDao _userDao = null;
    @Inject
    EventDao _eventDao = null;
    @Inject
    ConfigurationDao _configDao;
    @Inject
    UserVmDao _userVmDao = null;

    @Inject
    AccountManager _accountMgr;
    @Inject
    ConfigurationManager _configMgr;
    @Inject
    AccountVlanMapDao _accountVlanMapDao;
    @Inject
    NetworkOfferingDao _networkOfferingDao = null;
    @Inject
    NetworkDao _networksDao = null;
    @Inject
    NicDao _nicDao = null;
    @Inject
    RulesManager _rulesMgr;

    @Inject
    UsageEventDao _usageEventDao;

    List<NetworkGuru> _networkGurus;

    @Inject
    NetworkDomainDao _networkDomainDao;
    @Inject
    VMInstanceDao _vmDao;

    @Inject
    FirewallRulesDao _firewallDao;

    @Inject
    ResourceLimitService _resourceLimitMgr;

    @Inject
    DomainManager _domainMgr;
    @Inject
    ProjectManager _projectMgr;
    @Inject
    NetworkOfferingServiceMapDao _ntwkOfferingSrvcDao;
    @Inject
    PhysicalNetworkDao _physicalNetworkDao;
    @Inject
    PhysicalNetworkServiceProviderDao _pNSPDao;

    @Inject
    PhysicalNetworkTrafficTypeDao _pNTrafficTypeDao;

    @Inject
    NetworkServiceMapDao _ntwkSrvcDao;
    @Inject
    StorageNetworkManager _stnwMgr;
    @Inject
    VpcManager _vpcMgr;
    @Inject
    PrivateIpDao _privateIpDao;
    @Inject
    ResourceTagDao _resourceTagDao;
    @Inject
    NetworkOrchestrationService _networkMgr;
    @Inject
    NetworkModel _networkModel;

    @Inject
    NicSecondaryIpDao _nicSecondaryIpDao;

    @Inject
    PortForwardingRulesDao _portForwardingDao;
    @Inject
    HostDao _hostDao;
    @Inject
    HostPodDao _hostPodDao;
    @Inject
    InternalLoadBalancerElementService _internalLbElementSvc;
    @Inject
    DataCenterVnetDao _datacneterVnet;
    @Inject
    AccountGuestVlanMapDao _accountGuestVlanMapDao;
    @Inject
    VpcDao _vpcDao;
    @Inject
    NetworkACLDao _networkACLDao;
    @Inject
    OvsProviderDao _ovsProviderDao;
    @Inject
    IpAddressManager _ipAddrMgr;
    @Inject
    EntityManager _entityMgr;
    @Inject
    LoadBalancerVMMapDao _lbVmMapDao;

    @Inject
    LoadBalancingRulesService _lbService;

    @Inject
    public SecurityGroupService _securityGroupService;

    int _cidrLimit;
    boolean _allowSubdomainNetworkAccess;

    private Map<String, String> _configs;

    /* Get a list of IPs, classify them by service */
    protected Map<PublicIp, Set<Service>> getIpToServices(List<PublicIp> publicIps, boolean rulesRevoked, boolean includingFirewall) {
        Map<PublicIp, Set<Service>> ipToServices = new HashMap<PublicIp, Set<Service>>();

        if (publicIps != null && !publicIps.isEmpty()) {
            Set<Long> networkSNAT = new HashSet<Long>();
            for (PublicIp ip : publicIps) {
                Set<Service> services = ipToServices.get(ip);
                if (services == null) {
                    services = new HashSet<Service>();
                }
                if (ip.isSourceNat()) {
                    if (!networkSNAT.contains(ip.getAssociatedWithNetworkId())) {
                        services.add(Service.SourceNat);
                        networkSNAT.add(ip.getAssociatedWithNetworkId());
                    } else {
                        CloudRuntimeException ex = new CloudRuntimeException("Multiple generic soure NAT IPs provided for network");
                        // see the IPAddressVO.java class.
                        IPAddressVO ipAddr = ApiDBUtils.findIpAddressById(ip.getAssociatedWithNetworkId());
                        String ipAddrUuid = ip.getAssociatedWithNetworkId().toString();
                        if (ipAddr != null) {
                            ipAddrUuid = ipAddr.getUuid();
                        }
                        ex.addProxyObject(ipAddrUuid, "networkId");
                        throw ex;
                    }
                }
                ipToServices.put(ip, services);

                // if IP in allocating state then it will not have any rules attached so skip IPAssoc to network service
                // provider
                if (ip.getState() == State.Allocating) {
                    continue;
                }

                // check if any active rules are applied on the public IP
                Set<Purpose> purposes = getPublicIpPurposeInRules(ip, false, includingFirewall);
                // Firewall rules didn't cover static NAT
                if (ip.isOneToOneNat() && ip.getAssociatedWithVmId() != null) {
                    if (purposes == null) {
                        purposes = new HashSet<Purpose>();
                    }
                    purposes.add(Purpose.StaticNat);
                }
                if (purposes == null || purposes.isEmpty()) {
                    // since no active rules are there check if any rules are applied on the public IP but are in
// revoking state

                    purposes = getPublicIpPurposeInRules(ip, true, includingFirewall);
                    if (ip.isOneToOneNat()) {
                        if (purposes == null) {
                            purposes = new HashSet<Purpose>();
                        }
                        purposes.add(Purpose.StaticNat);
                    }
                    if (purposes == null || purposes.isEmpty()) {
                        // IP is not being used for any purpose so skip IPAssoc to network service provider
                        continue;
                    } else {
                        if (rulesRevoked) {
                            // no active rules/revoked rules are associated with this public IP, so remove the
// association with the provider
                            ip.setState(State.Releasing);
                        } else {
                            if (ip.getState() == State.Releasing) {
                                // rules are not revoked yet, so don't let the network service provider revoke the IP
// association
                                // mark IP is allocated so that IP association will not be removed from the provider
                                ip.setState(State.Allocated);
                            }
                        }
                    }
                }
                if (purposes.contains(Purpose.StaticNat)) {
                    services.add(Service.StaticNat);
                }
                if (purposes.contains(Purpose.LoadBalancing)) {
                    services.add(Service.Lb);
                }
                if (purposes.contains(Purpose.PortForwarding)) {
                    services.add(Service.PortForwarding);
                }
                if (purposes.contains(Purpose.Vpn)) {
                    services.add(Service.Vpn);
                }
                if (purposes.contains(Purpose.Firewall)) {
                    services.add(Service.Firewall);
                }
                if (services.isEmpty()) {
                    continue;
                }
                ipToServices.put(ip, services);
            }
        }
        return ipToServices;
    }

    protected boolean canIpUsedForNonConserveService(PublicIp ip, Service service) {
        // If it's non-conserve mode, then the new ip should not be used by any other services
        List<PublicIp> ipList = new ArrayList<PublicIp>();
        ipList.add(ip);
        Map<PublicIp, Set<Service>> ipToServices = getIpToServices(ipList, false, false);
        Set<Service> services = ipToServices.get(ip);
        // Not used currently, safe
        if (services == null || services.isEmpty()) {
            return true;
        }
        // Since it's non-conserve mode, only one service should used for IP
        if (services.size() != 1) {
            throw new InvalidParameterException("There are multiple services used ip " + ip.getAddress() + ".");
        }
        if (service != null && !((Service)services.toArray()[0] == service || service.equals(Service.Firewall))) {
            throw new InvalidParameterException("The IP " + ip.getAddress() + " is already used as " + ((Service)services.toArray()[0]).getName() + " rather than "
                    + service.getName());
        }
        return true;
    }

    protected boolean canIpsUsedForNonConserve(List<PublicIp> publicIps) {
        boolean result = true;
        for (PublicIp ip : publicIps) {
            result = canIpUsedForNonConserveService(ip, null);
            if (!result) {
                break;
            }
        }
        return result;
    }

    private boolean canIpsUseOffering(List<PublicIp> publicIps, long offeringId) {
        Map<PublicIp, Set<Service>> ipToServices = getIpToServices(publicIps, false, true);
        Map<Service, Set<Provider>> serviceToProviders = _networkModel.getNetworkOfferingServiceProvidersMap(offeringId);
        NetworkOfferingVO offering = _networkOfferingDao.findById(offeringId);
        //For inline mode checking, using firewall provider for LB instead, because public ip would apply on firewall provider
        if (offering.isInline()) {
            Provider firewallProvider = null;
            if (serviceToProviders.containsKey(Service.Firewall)) {
                firewallProvider = (Provider)serviceToProviders.get(Service.Firewall).toArray()[0];
            }
            Set<Provider> p = new HashSet<Provider>();
            p.add(firewallProvider);
            serviceToProviders.remove(Service.Lb);
            serviceToProviders.put(Service.Lb, p);
        }
        for (PublicIp ip : ipToServices.keySet()) {
            Set<Service> services = ipToServices.get(ip);
            Provider provider = null;
            for (Service service : services) {
                Set<Provider> curProviders = serviceToProviders.get(service);
                if (curProviders == null || curProviders.isEmpty()) {
                    continue;
                }
                Provider curProvider = (Provider)curProviders.toArray()[0];
                if (provider == null) {
                    provider = curProvider;
                    continue;
                }
                // We don't support multiple providers for one service now
                if (!provider.equals(curProvider)) {
                    throw new InvalidParameterException("There would be multiple providers for IP " + ip.getAddress() + " with the new network offering!");
                }
            }
        }
        return true;
    }

    private Set<Purpose> getPublicIpPurposeInRules(PublicIp ip, boolean includeRevoked, boolean includingFirewall) {
        Set<Purpose> result = new HashSet<Purpose>();
        List<FirewallRuleVO> rules = null;
        if (includeRevoked) {
            rules = _firewallDao.listByIp(ip.getId());
        } else {
            rules = _firewallDao.listByIpAndNotRevoked(ip.getId());
        }

        if (rules == null || rules.isEmpty()) {
            return null;
        }

        for (FirewallRuleVO rule : rules) {
            if (rule.getPurpose() != Purpose.Firewall || includingFirewall) {
                result.add(rule.getPurpose());
            }
        }

        return result;
    }

    @Override
    public List<? extends Network> getIsolatedNetworksOwnedByAccountInZone(long zoneId, Account owner) {

        return _networksDao.listByZoneAndGuestType(owner.getId(), zoneId, Network.GuestType.Isolated, false);
    }

    @Override
    public List<? extends Network> getIsolatedNetworksWithSourceNATOwnedByAccountInZone(long zoneId, Account owner) {

        return _networksDao.listSourceNATEnabledNetworks(owner.getId(), zoneId, Network.GuestType.Isolated);
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_NET_IP_ASSIGN, eventDescription = "allocating Ip", create = true)
    public IpAddress allocateIP(Account ipOwner, long zoneId, Long networkId, Boolean displayIp) throws ResourceAllocationException, InsufficientAddressCapacityException,
            ConcurrentOperationException {

        Account caller = CallContext.current().getCallingAccount();
        long callerUserId = CallContext.current().getCallingUserId();
        DataCenter zone = _entityMgr.findById(DataCenter.class, zoneId);

        if (networkId != null) {
            Network network = _networksDao.findById(networkId);
            if (network == null) {
                throw new InvalidParameterValueException("Invalid network id is given");
            }

            if (network.getGuestType() == Network.GuestType.Shared) {
                if (zone == null) {
                    throw new InvalidParameterValueException("Invalid zone Id is given");
                }
                // if shared network in the advanced zone, then check the caller against the network for 'AccessType.UseNetwork'
                if (zone.getNetworkType() == NetworkType.Advanced) {
                    if (isSharedNetworkOfferingWithServices(network.getNetworkOfferingId())) {
                        _accountMgr.checkAccess(caller, AccessType.UseEntry, false, network);
                        if (s_logger.isDebugEnabled()) {
                            s_logger.debug("Associate IP address called by the user " + callerUserId + " account " + ipOwner.getId());
                        }
                        return _ipAddrMgr.allocateIp(ipOwner, false, caller, callerUserId, zone, displayIp);
                    } else {
                        throw new InvalidParameterValueException("Associate IP address can only be called on the shared networks in the advanced zone"
                                + " with Firewall/Source Nat/Static Nat/Port Forwarding/Load balancing services enabled");
                    }
                }
            }
        } else {
            _accountMgr.checkAccess(caller, null, false, ipOwner);
        }

        return _ipAddrMgr.allocateIp(ipOwner, false, caller, callerUserId, zone, displayIp);
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_PORTABLE_IP_ASSIGN, eventDescription = "allocating portable public Ip", create = true)
    public IpAddress allocatePortableIP(Account ipOwner, int regionId, Long zoneId, Long networkId, Long vpcId) throws ResourceAllocationException,
            InsufficientAddressCapacityException, ConcurrentOperationException {
        Account caller = CallContext.current().getCallingAccount();
        long callerUserId = CallContext.current().getCallingUserId();
        DataCenter zone = _entityMgr.findById(DataCenter.class, zoneId);

        if ((networkId == null && vpcId == null) || (networkId != null && vpcId != null)) {
            throw new InvalidParameterValueException("One of Network id or VPC is should be passed");
        }

        if (networkId != null) {
            Network network = _networksDao.findById(networkId);
            if (network == null) {
                throw new InvalidParameterValueException("Invalid network id is given");
            }

            if (network.getGuestType() == Network.GuestType.Shared) {
                if (zone == null) {
                    throw new InvalidParameterValueException("Invalid zone Id is given");
                }
                // if shared network in the advanced zone, then check the caller against the network for 'AccessType.UseNetwork'
                if (zone.getNetworkType() == NetworkType.Advanced) {
                    if (isSharedNetworkOfferingWithServices(network.getNetworkOfferingId())) {
                        _accountMgr.checkAccess(caller, AccessType.UseEntry, false, network);
                        if (s_logger.isDebugEnabled()) {
                            s_logger.debug("Associate IP address called by the user " + callerUserId + " account " + ipOwner.getId());
                        }
                        return _ipAddrMgr.allocatePortableIp(ipOwner, caller, zoneId, networkId, null);
                    } else {
                        throw new InvalidParameterValueException("Associate IP address can only be called on the shared networks in the advanced zone"
                                + " with Firewall/Source Nat/Static Nat/Port Forwarding/Load balancing services enabled");
                    }
                }
            }
        }

        if (vpcId != null) {
            Vpc vpc = _vpcDao.findById(vpcId);
            if (vpc == null) {
                throw new InvalidParameterValueException("Invalid vpc id is given");
            }
        }

        _accountMgr.checkAccess(caller, null, false, ipOwner);

        return _ipAddrMgr.allocatePortableIp(ipOwner, caller, zoneId, null, null);
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_PORTABLE_IP_RELEASE, eventDescription = "disassociating portable Ip", async = true)
    public boolean releasePortableIpAddress(long ipAddressId) {
        try {
            return releaseIpAddressInternal(ipAddressId);
        } catch (Exception e) {
           return false;
        }
    }

    @Override
    @DB
    public boolean configure(final String name, final Map<String, Object> params) throws ConfigurationException {
        _configs = _configDao.getConfiguration("Network", params);

        _cidrLimit = NumbersUtil.parseInt(_configs.get(Config.NetworkGuestCidrLimit.key()), 22);

        _allowSubdomainNetworkAccess = Boolean.valueOf(_configs.get(Config.SubDomainNetworkAccess.key()));

        s_logger.info("Network Service is configured.");

        return true;
    }

    @Override
    public boolean start() {
        return true;
    }

    @Override
    public boolean stop() {
        return true;
    }

    protected NetworkServiceImpl() {
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_NIC_SECONDARY_IP_CONFIGURE, eventDescription = "Configuring secondary ip " +
            "rules",  async = true)
    public boolean configureNicSecondaryIp(NicSecondaryIp secIp, boolean isZoneSgEnabled) {
        boolean success = false;

        if (isZoneSgEnabled) {
            success = _securityGroupService.securityGroupRulesForVmSecIp(secIp.getNicId(), secIp.getIp4Address(), true);
            s_logger.info("Associated ip address to NIC : " + secIp.getIp4Address());
        } else {
            success = true;
        }
        return success;
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_NIC_SECONDARY_IP_ASSIGN, eventDescription = "assigning secondary ip to nic", create = true)
    public NicSecondaryIp allocateSecondaryGuestIP(final long nicId, String requestedIp) throws InsufficientAddressCapacityException {

        Account caller = CallContext.current().getCallingAccount();

        //check whether the nic belongs to user vm.
        final NicVO nicVO = _nicDao.findById(nicId);
        if (nicVO == null) {
            throw new InvalidParameterValueException("There is no nic for the " + nicId);
        }

        if (nicVO.getVmType() != VirtualMachine.Type.User) {
            throw new InvalidParameterValueException("The nic is not belongs to user vm");
        }

        VirtualMachine vm = _userVmDao.findById(nicVO.getInstanceId());
        if (vm == null) {
            throw new InvalidParameterValueException("There is no vm with the nic");
        }

        final long networkId = nicVO.getNetworkId();
        final Account ipOwner = _accountMgr.getAccount(vm.getAccountId());

        // verify permissions
        _accountMgr.checkAccess(caller, null, true, vm);

        Network network = _networksDao.findById(networkId);
        if (network == null) {
            throw new InvalidParameterValueException("Invalid network id is given");
        }

        int maxAllowedIpsPerNic = NumbersUtil.parseInt(_configDao.getValue(Config.MaxNumberOfSecondaryIPsPerNIC.key()), 10);
        Long nicWiseIpCount = _nicSecondaryIpDao.countByNicId(nicId);
        if(nicWiseIpCount.intValue() >= maxAllowedIpsPerNic) {
            s_logger.error("Maximum Number of Ips \"vm.network.nic.max.secondary.ipaddresses = \"" + maxAllowedIpsPerNic + " per Nic has been crossed for the nic " +  nicId + ".");
            throw new InsufficientAddressCapacityException("Maximum Number of Ips per Nic has been crossed.", Nic.class, nicId);
        }


        s_logger.debug("Calling the ip allocation ...");
        String ipaddr = null;
        //Isolated network can exist in Basic zone only, so no need to verify the zone type
        if (network.getGuestType() == Network.GuestType.Isolated) {
            try {
                ipaddr = _ipAddrMgr.allocateGuestIP(network, requestedIp);
            } catch (InsufficientAddressCapacityException e) {
                throw new InvalidParameterValueException("Allocating guest ip for nic failed");
            }
        } else if (network.getGuestType() == Network.GuestType.Shared) {
            //for basic zone, need to provide the podId to ensure proper ip alloation
            Long podId = null;
            DataCenter dc = _dcDao.findById(network.getDataCenterId());

            if (dc.getNetworkType() == NetworkType.Basic) {
            VMInstanceVO vmi = (VMInstanceVO)vm;
                podId = vmi.getPodIdToDeployIn();
            if (podId == null) {
                    throw new InvalidParameterValueException("vm pod id is null in Basic zone; can't decide the range for ip allocation");
            }
            }

            try {
                ipaddr = _ipAddrMgr.allocatePublicIpForGuestNic(network, podId, ipOwner, requestedIp);
                if (ipaddr == null) {
                    throw new InvalidParameterValueException("Allocating ip to guest nic " + nicId + " failed");
                }
            } catch (InsufficientAddressCapacityException e) {
                s_logger.error("Allocating ip to guest nic " + nicId + " failed");
                return null;
            }
        } else {
            s_logger.error("AddIpToVMNic is not supported in this network...");
            return null;
        }

        if (ipaddr != null) {
            // we got the ip addr so up the nics table and secodary ip
            final String addrFinal = ipaddr;
            long id = Transaction.execute(new TransactionCallback<Long>() {
                @Override
                public Long doInTransaction(TransactionStatus status) {
            boolean nicSecondaryIpSet = nicVO.getSecondaryIp();
            if (!nicSecondaryIpSet) {
                nicVO.setSecondaryIp(true);
                // commit when previously set ??
                s_logger.debug("Setting nics table ...");
                _nicDao.update(nicId, nicVO);
            }

            s_logger.debug("Setting nic_secondary_ip table ...");
                    Long vmId = nicVO.getInstanceId();
                    NicSecondaryIpVO secondaryIpVO = new NicSecondaryIpVO(nicId, addrFinal, vmId, ipOwner.getId(), ipOwner.getDomainId(), networkId);
            _nicSecondaryIpDao.persist(secondaryIpVO);
                    return secondaryIpVO.getId();
                }
            });

           return getNicSecondaryIp(id);
        } else {
            return null;
        }
    }

    @Override
    @DB
    @ActionEvent(eventType = EventTypes.EVENT_NIC_SECONDARY_IP_UNASSIGN, eventDescription = "Removing secondary ip " +
            "from nic", async = true)
    public boolean releaseSecondaryIpFromNic(long ipAddressId) {
        Account caller = CallContext.current().getCallingAccount();
        boolean success = false;

        // Verify input parameters
        NicSecondaryIpVO secIpVO = _nicSecondaryIpDao.findById(ipAddressId);
        if (secIpVO == null) {
            throw new InvalidParameterValueException("Unable to find secondary ip address by id");
        }

        VirtualMachine vm = _userVmDao.findById(secIpVO.getVmId());
        if (vm == null) {
            throw new InvalidParameterValueException("There is no vm with the given secondary ip");
        }
        // verify permissions
        _accountMgr.checkAccess(caller, null, true, vm);

        Network network = _networksDao.findById(secIpVO.getNetworkId());

        if (network == null) {
            throw new InvalidParameterValueException("Invalid network id is given");
        }

        // Validate network offering
        NetworkOfferingVO ntwkOff = _networkOfferingDao.findById(network.getNetworkOfferingId());

        Long nicId = secIpVO.getNicId();
        s_logger.debug("ip id = " + ipAddressId + " nic id = " + nicId);
        //check is this the last secondary ip for NIC
        List<NicSecondaryIpVO> ipList = _nicSecondaryIpDao.listByNicId(nicId);
        boolean lastIp = false;
        if (ipList.size() == 1) {
            // this is the last secondary ip to nic
            lastIp = true;
        }

        DataCenter dc = _dcDao.findById(network.getDataCenterId());
        if (dc == null) {
            throw new InvalidParameterValueException("Invalid zone Id is given");
        }

        s_logger.debug("Calling secondary ip " + secIpVO.getIp4Address() + " release ");
        if (dc.getNetworkType() == NetworkType.Advanced && network.getGuestType() == Network.GuestType.Isolated) {
            //check PF or static NAT is configured on this ip address
            String secondaryIp = secIpVO.getIp4Address();
            List<FirewallRuleVO> fwRulesList =  _firewallDao.listByNetworkAndPurpose(network.getId(), Purpose.PortForwarding);

            if (fwRulesList.size() != 0) {
                for (FirewallRuleVO rule : fwRulesList) {
                    if (_portForwardingDao.findByIdAndIp(rule.getId(), secondaryIp) != null) {
                        s_logger.debug("VM nic IP " + secondaryIp + " is associated with the port forwarding rule");
                        throw new InvalidParameterValueException("Can't remove the secondary ip " + secondaryIp + " is associate with the port forwarding rule");
                    }
                }
            }
            //check if the secondary ip associated with any static nat rule
            IPAddressVO publicIpVO = _ipAddressDao.findByVmIp(secondaryIp);
            if (publicIpVO != null) {
                s_logger.debug("VM nic IP " + secondaryIp + " is associated with the static NAT rule public IP address id " + publicIpVO.getId());
                throw new InvalidParameterValueException("Can' remove the ip " + secondaryIp + "is associate with static NAT rule public IP address id " + publicIpVO.getId());
            }

            if (_lbService.isLbRuleMappedToVmGuestIp(secondaryIp)) {
                s_logger.debug("VM nic IP " + secondaryIp + " is mapped to load balancing rule");
                throw new InvalidParameterValueException("Can't remove the secondary ip " + secondaryIp + " is mapped to load balancing rule");
            }

        } else if (dc.getNetworkType() == NetworkType.Basic || ntwkOff.getGuestType() == Network.GuestType.Shared) {
            final IPAddressVO ip = _ipAddressDao.findByIpAndSourceNetworkId(secIpVO.getNetworkId(), secIpVO.getIp4Address());
            if (ip != null) {
                Transaction.execute(new TransactionCallbackNoReturn() {
                    @Override
                    public void doInTransactionWithoutResult(TransactionStatus status) {
                _ipAddrMgr.markIpAsUnavailable(ip.getId());
                _ipAddressDao.unassignIpAddress(ip.getId());
                    }
                });
            }
        } else {
            throw new InvalidParameterValueException("Not supported for this network now");
        }

        success = removeNicSecondaryIP(secIpVO, lastIp);
        return success;
    }

    boolean removeNicSecondaryIP(final NicSecondaryIpVO ipVO, final boolean lastIp) {
        final long nicId = ipVO.getNicId();
        final NicVO nic = _nicDao.findById(nicId);

        Transaction.execute(new TransactionCallbackNoReturn() {
            @Override
            public void doInTransactionWithoutResult(TransactionStatus status) {
        if (lastIp) {
            nic.setSecondaryIp(false);
            s_logger.debug("Setting nics secondary ip to false ...");
            _nicDao.update(nicId, nic);
        }

        s_logger.debug("Revoving nic secondary ip entry ...");
        _nicSecondaryIpDao.remove(ipVO.getId());
            }
        });

        return true;
    }

    NicSecondaryIp getNicSecondaryIp(long id) {
        NicSecondaryIp nicSecIp = _nicSecondaryIpDao.findById(id);
        if (nicSecIp == null) {
            return null;
        }
        return nicSecIp;
    }

    @Override
    @ActionEvent(eventType = EventTypes.EVENT_NET_IP_RELEASE, eventDescription = "disassociating Ip", async = true)
    public boolean releaseIpAddress(long ipAddressId) throws InsufficientAddressCapacityException {
        return releaseIpAddressInternal(ipAddressId);
    }

    @DB
    private boolean releaseIpAddressInternal(long ipAddressId) throws InsufficientAddressCapacityException {
        Long userId = CallContext.current().getCallingUserId();
        Account caller = CallContext.current().getCallingAccount();

        // Verify input parameters
        IPAddressVO ipVO = _ipAddressDao.findById(ipAddressId);
        if (ipVO == null) {
            throw new InvalidParameterValueException("Unable to find ip address by id");
        }

        if (ipVO.getAllocatedTime() == null) {
            s_logger.debug("Ip Address id= " + ipAddressId + " is not allocated, so do nothing.");
            return true;
        }

        // verify permissions
        if (ipVO.getAllocatedToAccountId() != null) {
            _accountMgr.checkAccess(caller, null, true, ipVO);
        }

        if (ipVO.isSourceNat()) {
            throw new IllegalArgumentException("ip address is used for source nat purposes and can not be disassociated.");
        }

        VlanVO vlan = _vlanDao.findById(ipVO.getVlanId());
        if (!vlan.getVlanType().equals(VlanType.VirtualNetwork)) {
            throw new IllegalArgumentException("only ip addresses that belong to a virtual network may be disassociated.");
        }

        // don't allow releasing system ip address
        if (ipVO.getSystem()) {
            InvalidParameterValueException ex = new InvalidParameterValueException("Can't release system IP address with specified id");
            ex.addProxyObject(ipVO.getUuid(), "systemIpAddrId");
            throw ex;
        }

        boolean success = _ipAddrMgr.disassociatePublicIpAddress(ipAddressId, userId, caller);

        if (success) {
            Long networkId = ipVO.getAssociatedWithNetworkId();
            if (networkId != null) {
                Network guestNetwork = getNetwork(networkId);
                NetworkOffering offering = _entityMgr.findById(NetworkOffering.class, guestNetwork.getNetworkOfferingId());
                Long vmId = ipVO.getAssociatedWithVmId();
                if (offering.getElasticIp() && vmId != null) {
                    _rulesMgr.getSystemIpAndEnableStaticNatForVm(_userVmDao.findById(vmId), true);
                    return true;
                }
            }
        } else {
            s_logger.warn("Failed to release public ip address id=" + ipAddressId);
        }
        return success;
    }

    @Override
    @DB
    public Network getNetwork(long id) {
        return _networksDao.findById(id);
    }

    private void checkSharedNetworkCidrOverlap(Long zoneId, long physicalNetworkId, String cidr) {
        if (zoneId == null || cidr == null) {
            return;
        }

        DataCenter zone = _dcDao.findById(zoneId);
        List<NetworkVO> networks = _networksDao.listByZone(zoneId);
        Map<Long, String> networkToCidr = new HashMap<Long, String>();

        // check for CIDR overlap with all possible CIDR for isolated guest networks
        // in the zone when using external networking
        PhysicalNetworkVO pNetwork = _physicalNetworkDao.findById(physicalNetworkId);
        if (pNetwork.getVnet() != null) {
            List<Pair<Integer, Integer>> vlanList = pNetwork.getVnet();
            for (Pair<Integer, Integer> vlanRange : vlanList) {
                Integer lowestVlanTag = vlanRange.first();
                Integer highestVlanTag = vlanRange.second();
                for (int vlan = lowestVlanTag; vlan <= highestVlanTag; ++vlan) {
                    int offset = vlan - lowestVlanTag;
                    String globalVlanBits = _configDao.getValue(Config.GuestVlanBits.key());
                    int cidrSize = 8 + Integer.parseInt(globalVlanBits);
                    String guestNetworkCidr = zone.getGuestNetworkCidr();
                    String[] cidrTuple = guestNetworkCidr.split("\\/");
                    long newCidrAddress = (NetUtils.ip2Long(cidrTuple[0]) & 0xff000000) | (offset << (32 - cidrSize));
                    if (NetUtils.isNetworksOverlap(NetUtils.long2Ip(newCidrAddress), cidr)) {
                        throw new InvalidParameterValueException("Specified CIDR for shared network conflict with CIDR that is reserved for zone vlan " + vlan);
                    }
                }
            }
        }

        // check for CIDR overlap with all CIDR's of the shared networks in the zone
        for (NetworkVO network : networks) {
            if (network.getGuestType() == GuestType.Isolated) {
                continue;
            }
            if (network.getCidr() != null) {
                networkToCidr.put(network.getId(), network.getCidr());
            }
        }
        if (networkToCidr != null && !networkToCidr.isEmpty()) {
            for (long networkId : networkToCidr.keySet()) {