// 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 java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.UUID;

import javax.inject.Inject;

import org.apache.log4j.Logger;

import org.apache.cloudstack.acl.ControlledEntity.ACLType;
import org.apache.cloudstack.acl.SecurityChecker.AccessType;
import org.apache.cloudstack.context.CallContext;
import org.apache.cloudstack.engine.orchestration.service.NetworkOrchestrationService;
import org.apache.cloudstack.framework.config.ConfigKey;
import org.apache.cloudstack.framework.config.Configurable;
import org.apache.cloudstack.framework.config.dao.ConfigurationDao;
import org.apache.cloudstack.region.PortableIp;
import org.apache.cloudstack.region.PortableIpDao;
import org.apache.cloudstack.region.PortableIpVO;
import org.apache.cloudstack.region.Region;

import com.cloud.agent.AgentManager;
import com.cloud.alert.AlertManager;
import com.cloud.api.ApiDBUtils;
import com.cloud.configuration.ConfigurationManager;
import com.cloud.configuration.Resource.ResourceType;
import com.cloud.dc.AccountVlanMapVO;
import com.cloud.dc.DataCenter;
import com.cloud.dc.DataCenter.NetworkType;
import com.cloud.dc.Pod;
import com.cloud.dc.PodVlanMapVO;
import com.cloud.dc.Vlan;
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.PodVlanMapDao;
import com.cloud.dc.dao.VlanDao;
import com.cloud.deploy.DeployDestination;
import com.cloud.domain.Domain;
import com.cloud.domain.dao.DomainDao;
import com.cloud.event.ActionEventUtils;
import com.cloud.event.EventTypes;
import com.cloud.event.UsageEventUtils;
import com.cloud.event.dao.UsageEventDao;
import com.cloud.exception.AccountLimitException;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientAddressCapacityException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.InsufficientVirtualNetworkCapcityException;
import com.cloud.exception.InvalidParameterValueException;
import com.cloud.exception.PermissionDeniedException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.exception.ResourceUnavailableException;
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.AddressFormat;
import com.cloud.network.Networks.BroadcastDomainType;
import com.cloud.network.Networks.IsolationType;
import com.cloud.network.Networks.TrafficType;
import com.cloud.network.addr.PublicIp;
import com.cloud.network.dao.AccountGuestVlanMapDao;
import com.cloud.network.dao.FirewallRulesDao;
import com.cloud.network.dao.IPAddressDao;
import com.cloud.network.dao.IPAddressVO;
import com.cloud.network.dao.LoadBalancerDao;
import com.cloud.network.dao.NetworkAccountDao;
import com.cloud.network.dao.NetworkDao;
import com.cloud.network.dao.NetworkDomainDao;
import com.cloud.network.dao.NetworkServiceMapDao;
import com.cloud.network.dao.PhysicalNetworkDao;
import com.cloud.network.dao.PhysicalNetworkServiceProviderDao;
import com.cloud.network.dao.PhysicalNetworkTrafficTypeDao;
import com.cloud.network.dao.UserIpv6AddressDao;
import com.cloud.network.element.IpDeployer;
import com.cloud.network.element.IpDeployingRequester;
import com.cloud.network.element.NetworkElement;
import com.cloud.network.element.StaticNatServiceProvider;
import com.cloud.network.guru.NetworkGuru;
import com.cloud.network.lb.LoadBalancingRulesManager;
import com.cloud.network.rules.FirewallManager;
import com.cloud.network.rules.FirewallRule;
import com.cloud.network.rules.FirewallRule.Purpose;
import com.cloud.network.rules.FirewallRuleVO;
import com.cloud.network.rules.RulesManager;
import com.cloud.network.rules.StaticNat;
import com.cloud.network.rules.dao.PortForwardingRulesDao;
import com.cloud.network.vpc.NetworkACLManager;
import com.cloud.network.vpc.VpcManager;
import com.cloud.network.vpc.dao.PrivateIpDao;
import com.cloud.network.vpn.RemoteAccessVpnService;
import com.cloud.offering.NetworkOffering;
import com.cloud.offering.NetworkOffering.Availability;
import com.cloud.offerings.NetworkOfferingVO;
import com.cloud.offerings.dao.NetworkOfferingDao;
import com.cloud.offerings.dao.NetworkOfferingDetailsDao;
import com.cloud.offerings.dao.NetworkOfferingServiceMapDao;
import com.cloud.org.Grouping;
import com.cloud.user.Account;
import com.cloud.user.AccountManager;
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.Pair;
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.GlobalLock;
import com.cloud.utils.db.JoinBuilder.JoinType;
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.exception.CloudRuntimeException;
import com.cloud.utils.net.Ip;
import com.cloud.utils.net.NetUtils;
import com.cloud.vm.Nic;
import com.cloud.vm.NicProfile;
import com.cloud.vm.ReservationContext;
import com.cloud.vm.ReservationContextImpl;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.VirtualMachineProfile;
import com.cloud.vm.dao.NicDao;
import com.cloud.vm.dao.NicIpAliasDao;
import com.cloud.vm.dao.NicSecondaryIpDao;
import com.cloud.vm.dao.UserVmDao;
import com.cloud.vm.dao.VMInstanceDao;

public class IpAddressManagerImpl extends ManagerBase implements IpAddressManager, Configurable {
    private static final Logger s_logger = Logger.getLogger(IpAddressManagerImpl.class);

    @Inject
    NetworkOrchestrationService _networkMgr = null;
    @Inject
    EntityManager _entityMgr = null;
    @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
    ConfigurationDao _configDao;
    @Inject
    UserVmDao _userVmDao = null;
    @Inject
    AlertManager _alertMgr;
    @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
    LoadBalancingRulesManager _lbMgr;
    @Inject
    RemoteAccessVpnService _vpnMgr;
    @Inject
    PodVlanMapDao _podVlanMapDao;
    @Inject
    NetworkOfferingDetailsDao _ntwkOffDetailsDao;
    @Inject
    AccountGuestVlanMapDao _accountGuestVlanMapDao;
    @Inject
    DataCenterVnetDao _datacenterVnetDao;
    @Inject
    NetworkAccountDao _networkAccountDao;
    @Inject
    protected NicIpAliasDao _nicIpAliasDao;
    @Inject
    protected IPAddressDao _publicIpAddressDao;
    @Inject
    NetworkDomainDao _networkDomainDao;
    @Inject
    VMInstanceDao _vmDao;
    @Inject
    FirewallManager _firewallMgr;
    @Inject
    FirewallRulesDao _firewallDao;
    @Inject
    ResourceLimitService _resourceLimitMgr;

    @Inject
    NetworkOfferingServiceMapDao _ntwkOfferingSrvcDao;
    @Inject
    PhysicalNetworkDao _physicalNetworkDao;
    @Inject
    PhysicalNetworkServiceProviderDao _pNSPDao;
    @Inject
    PortForwardingRulesDao _portForwardingRulesDao;
    @Inject
    LoadBalancerDao _lbDao;
    @Inject
    PhysicalNetworkTrafficTypeDao _pNTrafficTypeDao;
    @Inject
    AgentManager _agentMgr;
    @Inject
    HostDao _hostDao;
    @Inject
    NetworkServiceMapDao _ntwkSrvcDao;
    @Inject
    StorageNetworkManager _stnwMgr;
    @Inject
    VpcManager _vpcMgr;
    @Inject
    PrivateIpDao _privateIpDao;
    @Inject
    NetworkACLManager _networkACLMgr;
    @Inject
    UsageEventDao _usageEventDao;
    @Inject
    NetworkModel _networkModel;
    @Inject
    NicSecondaryIpDao _nicSecondaryIpDao;
    @Inject
    UserIpv6AddressDao _ipv6Dao;
    @Inject
    Ipv6AddressManager _ipv6Mgr;
    @Inject
    PortableIpDao _portableIpDao;
    SearchBuilder<IPAddressVO> AssignIpAddressSearch;
    SearchBuilder<IPAddressVO> AssignIpAddressFromPodVlanSearch;

    @Override
    public boolean configure(String name, Map<String, Object> params) {
        // populate providers
        Map<Network.Service, Set<Network.Provider>> defaultSharedNetworkOfferingProviders = new HashMap<Network.Service, Set<Network.Provider>>();
        Set<Network.Provider> defaultProviders = new HashSet<Network.Provider>();

        defaultProviders.add(Network.Provider.VirtualRouter);
        defaultSharedNetworkOfferingProviders.put(Service.Dhcp, defaultProviders);
        defaultSharedNetworkOfferingProviders.put(Service.Dns, defaultProviders);
        defaultSharedNetworkOfferingProviders.put(Service.UserData, defaultProviders);

        Map<Network.Service, Set<Network.Provider>> defaultIsolatedNetworkOfferingProviders = defaultSharedNetworkOfferingProviders;
        defaultIsolatedNetworkOfferingProviders.put(Service.Dhcp, defaultProviders);
        defaultIsolatedNetworkOfferingProviders.put(Service.Dns, defaultProviders);
        defaultIsolatedNetworkOfferingProviders.put(Service.UserData, defaultProviders);
        defaultIsolatedNetworkOfferingProviders.put(Service.Firewall, defaultProviders);
        defaultIsolatedNetworkOfferingProviders.put(Service.Gateway, defaultProviders);
        defaultIsolatedNetworkOfferingProviders.put(Service.Lb, defaultProviders);
        defaultIsolatedNetworkOfferingProviders.put(Service.StaticNat, defaultProviders);
        defaultIsolatedNetworkOfferingProviders.put(Service.PortForwarding, defaultProviders);
        defaultIsolatedNetworkOfferingProviders.put(Service.Vpn, defaultProviders);

        Map<Network.Service, Set<Network.Provider>> defaultSharedSGEnabledNetworkOfferingProviders = new HashMap<Network.Service, Set<Network.Provider>>();
        defaultSharedSGEnabledNetworkOfferingProviders.put(Service.Dhcp, defaultProviders);
        defaultSharedSGEnabledNetworkOfferingProviders.put(Service.Dns, defaultProviders);
        defaultSharedSGEnabledNetworkOfferingProviders.put(Service.UserData, defaultProviders);
        Set<Provider> sgProviders = new HashSet<Provider>();
        sgProviders.add(Provider.SecurityGroupProvider);
        defaultSharedSGEnabledNetworkOfferingProviders.put(Service.SecurityGroup, sgProviders);

        Map<Network.Service, Set<Network.Provider>> defaultIsolatedSourceNatEnabledNetworkOfferingProviders = new HashMap<Network.Service, Set<Network.Provider>>();
        defaultProviders.clear();
        defaultProviders.add(Network.Provider.VirtualRouter);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.Dhcp, defaultProviders);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.Dns, defaultProviders);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.UserData, defaultProviders);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.Firewall, defaultProviders);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.Gateway, defaultProviders);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.Lb, defaultProviders);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.SourceNat, defaultProviders);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.StaticNat, defaultProviders);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.PortForwarding, defaultProviders);
        defaultIsolatedSourceNatEnabledNetworkOfferingProviders.put(Service.Vpn, defaultProviders);

        Map<Network.Service, Set<Network.Provider>> defaultVPCOffProviders = new HashMap<Network.Service, Set<Network.Provider>>();
        defaultProviders.clear();
        defaultProviders.add(Network.Provider.VirtualRouter);
        defaultVPCOffProviders.put(Service.Dhcp, defaultProviders);
        defaultVPCOffProviders.put(Service.Dns, defaultProviders);
        defaultVPCOffProviders.put(Service.UserData, defaultProviders);
        defaultVPCOffProviders.put(Service.NetworkACL, defaultProviders);
        defaultVPCOffProviders.put(Service.Gateway, defaultProviders);
        defaultVPCOffProviders.put(Service.Lb, defaultProviders);
        defaultVPCOffProviders.put(Service.SourceNat, defaultProviders);
        defaultVPCOffProviders.put(Service.StaticNat, defaultProviders);
        defaultVPCOffProviders.put(Service.PortForwarding, defaultProviders);
        defaultVPCOffProviders.put(Service.Vpn, defaultProviders);


        //#8 - network offering with internal lb service
        Map<Network.Service, Set<Network.Provider>> internalLbOffProviders = new HashMap<Network.Service, Set<Network.Provider>>();
        Set<Network.Provider> defaultVpcProvider = new HashSet<Network.Provider>();
        defaultVpcProvider.add(Network.Provider.VPCVirtualRouter);

        Set<Network.Provider> defaultInternalLbProvider = new HashSet<Network.Provider>();
        defaultInternalLbProvider.add(Network.Provider.InternalLbVm);

        internalLbOffProviders.put(Service.Dhcp, defaultVpcProvider);
        internalLbOffProviders.put(Service.Dns, defaultVpcProvider);
        internalLbOffProviders.put(Service.UserData, defaultVpcProvider);
        internalLbOffProviders.put(Service.NetworkACL, defaultVpcProvider);
        internalLbOffProviders.put(Service.Gateway, defaultVpcProvider);
        internalLbOffProviders.put(Service.Lb, defaultInternalLbProvider);
        internalLbOffProviders.put(Service.SourceNat, defaultVpcProvider);


        Map<Network.Service, Set<Network.Provider>> netscalerServiceProviders = new HashMap<Network.Service, Set<Network.Provider>>();
        Set<Network.Provider> vrProvider = new HashSet<Network.Provider>();
        vrProvider.add(Provider.VirtualRouter);
        Set<Network.Provider> sgProvider = new HashSet<Network.Provider>();
        sgProvider.add(Provider.SecurityGroupProvider);
        Set<Network.Provider> nsProvider = new HashSet<Network.Provider>();
        nsProvider.add(Provider.Netscaler);
        netscalerServiceProviders.put(Service.Dhcp, vrProvider);
        netscalerServiceProviders.put(Service.Dns, vrProvider);
        netscalerServiceProviders.put(Service.UserData, vrProvider);
        netscalerServiceProviders.put(Service.SecurityGroup, sgProvider);
        netscalerServiceProviders.put(Service.StaticNat, nsProvider);
        netscalerServiceProviders.put(Service.Lb, nsProvider);

        Map<Service, Map<Capability, String>> serviceCapabilityMap = new HashMap<Service, Map<Capability, String>>();
        Map<Capability, String> elb = new HashMap<Capability, String>();
        elb.put(Capability.ElasticLb, "true");
        Map<Capability, String> eip = new HashMap<Capability, String>();
        eip.put(Capability.ElasticIp, "true");
        serviceCapabilityMap.put(Service.Lb, elb);
        serviceCapabilityMap.put(Service.StaticNat, eip);


        AssignIpAddressSearch = _ipAddressDao.createSearchBuilder();
        AssignIpAddressSearch.and("dc", AssignIpAddressSearch.entity().getDataCenterId(), Op.EQ);
        AssignIpAddressSearch.and("allocated", AssignIpAddressSearch.entity().getAllocatedTime(), Op.NULL);
        AssignIpAddressSearch.and("vlanId", AssignIpAddressSearch.entity().getVlanId(), Op.IN);
        SearchBuilder<VlanVO> vlanSearch = _vlanDao.createSearchBuilder();
        vlanSearch.and("type", vlanSearch.entity().getVlanType(), Op.EQ);
        vlanSearch.and("networkId", vlanSearch.entity().getNetworkId(), Op.EQ);
        AssignIpAddressSearch.join("vlan", vlanSearch, vlanSearch.entity().getId(), AssignIpAddressSearch.entity().getVlanId(), JoinType.INNER);
        AssignIpAddressSearch.done();

        AssignIpAddressFromPodVlanSearch = _ipAddressDao.createSearchBuilder();
        AssignIpAddressFromPodVlanSearch.and("dc", AssignIpAddressFromPodVlanSearch.entity().getDataCenterId(), Op.EQ);
        AssignIpAddressFromPodVlanSearch.and("allocated", AssignIpAddressFromPodVlanSearch.entity().getAllocatedTime(), Op.NULL);
        SearchBuilder<VlanVO> podVlanSearch = _vlanDao.createSearchBuilder();
        podVlanSearch.and("type", podVlanSearch.entity().getVlanType(), Op.EQ);
        podVlanSearch.and("networkId", podVlanSearch.entity().getNetworkId(), Op.EQ);
        SearchBuilder<PodVlanMapVO> podVlanMapSB = _podVlanMapDao.createSearchBuilder();
        podVlanMapSB.and("podId", podVlanMapSB.entity().getPodId(), Op.EQ);
        AssignIpAddressFromPodVlanSearch.join("podVlanMapSB",
            podVlanMapSB,
            podVlanMapSB.entity().getVlanDbId(),
            AssignIpAddressFromPodVlanSearch.entity().getVlanId(),
            JoinType.INNER);
        AssignIpAddressFromPodVlanSearch.join("vlan", podVlanSearch, podVlanSearch.entity().getId(), AssignIpAddressFromPodVlanSearch.entity().getVlanId(), JoinType.INNER);
        AssignIpAddressFromPodVlanSearch.done();

        Network.State.getStateMachine().registerListener(new NetworkStateListener(_usageEventDao, _networksDao));

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

        return true;
    }

    private IpAddress allocateIP(Account ipOwner, boolean isSystem, long zoneId) throws ResourceAllocationException, InsufficientAddressCapacityException,
        ConcurrentOperationException {
        Account caller = CallContext.current().getCallingAccount();
        long callerUserId = CallContext.current().getCallingUserId();
        // check permissions
        _accountMgr.checkAccess(caller, null, false, ipOwner);

        DataCenter zone = _entityMgr.findById(DataCenter.class, zoneId);

        return allocateIp(ipOwner, isSystem, caller, callerUserId, zone);
    }

    // An IP association is required in below cases
    //  1.there is at least one public IP associated with the network on which first rule (PF/static NAT/LB) is being applied.
    //  2.last rule (PF/static NAT/LB) on the public IP has been revoked. So the public IP should not be associated with any provider
    boolean checkIfIpAssocRequired(Network network, boolean postApplyRules, List<PublicIp> publicIps) {
        for (PublicIp ip : publicIps) {
            if (ip.isSourceNat()) {
                continue;
            } else if (ip.isOneToOneNat()) {
                continue;
            } else {
                Long totalCount = null;
                Long revokeCount = null;
                Long activeCount = null;
                Long addCount = null;

                totalCount = _firewallDao.countRulesByIpId(ip.getId());
                if (postApplyRules) {
                    revokeCount = _firewallDao.countRulesByIpIdAndState(ip.getId(), FirewallRule.State.Revoke);
                } else {
                    activeCount = _firewallDao.countRulesByIpIdAndState(ip.getId(), FirewallRule.State.Active);
                    addCount = _firewallDao.countRulesByIpIdAndState(ip.getId(), FirewallRule.State.Add);
                }

                if (totalCount == null || totalCount.longValue() == 0L) {
                    continue;
                }

                if (postApplyRules) {

                    if (revokeCount != null && revokeCount.longValue() == totalCount.longValue()) {
                        s_logger.trace("All rules are in Revoke state, have to dis-assiciate IP from the backend");
                        return true;
                    }
                } else {
                    if (activeCount != null && activeCount > 0) {
                        continue;
                    } else if (addCount != null && addCount.longValue() == totalCount.longValue()) {
                        s_logger.trace("All rules are in Add state, have to assiciate IP with the backend");
                        return true;
                    } else {
                        continue;
                    }
                }
            }
        }

        // there are no IP's corresponding to this network that need to be associated with provider
        return false;
    }

    @Override
    public boolean applyRules(List<? extends FirewallRule> rules, FirewallRule.Purpose purpose, NetworkRuleApplier applier, boolean continueOnError)
        throws ResourceUnavailableException {
        if (rules == null || rules.size() == 0) {
            s_logger.debug("There are no rules to forward to the network elements");
            return true;
        }

        boolean success = true;
        Network network = _networksDao.findById(rules.get(0).getNetworkId());
        FirewallRuleVO.TrafficType trafficType = rules.get(0).getTrafficType();
        List<PublicIp> publicIps = new ArrayList<PublicIp>();

        if (!(rules.get(0).getPurpose() == FirewallRule.Purpose.Firewall && trafficType == FirewallRule.TrafficType.Egress)) {
            // get the list of public ip's owned by the network
            List<IPAddressVO> userIps = _ipAddressDao.listByAssociatedNetwork(network.getId(), null);
            if (userIps != null && !userIps.isEmpty()) {
                for (IPAddressVO userIp : userIps) {
                    PublicIp publicIp = PublicIp.createFromAddrAndVlan(userIp, _vlanDao.findById(userIp.getVlanId()));
                    publicIps.add(publicIp);
                }
            }
        }
        // rules can not programmed unless IP is associated with network service provider, so run IP assoication for
        // the network so as to ensure IP is associated before applying rules (in add state)
        if (checkIfIpAssocRequired(network, false, publicIps)) {
            applyIpAssociations(network, false, continueOnError, publicIps);
        }

        try {
            applier.applyRules(network, purpose, rules);
        } catch (ResourceUnavailableException e) {
            if (!continueOnError) {
                throw e;
            }
            s_logger.warn("Problems with applying " + purpose + " rules but pushing on", e);
            success = false;
        }

        // if there are no active rules associated with a public IP, then public IP need not be associated with a provider.
        // This IPAssoc ensures, public IP is dis-associated after last active rule is revoked.
        if (checkIfIpAssocRequired(network, true, publicIps)) {
            applyIpAssociations(network, true, continueOnError, publicIps);
        }

        return success;
    }

    protected boolean cleanupIpResources(long ipId, long userId, Account caller) {
        boolean success = true;

        // Revoke all firewall rules for the ip
        try {
            s_logger.debug("Revoking all " + Purpose.Firewall + "rules as a part of public IP id=" + ipId + " release...");
            if (!_firewallMgr.revokeFirewallRulesForIp(ipId, userId, caller)) {
                s_logger.warn("Unable to revoke all the firewall rules for ip id=" + ipId + " as a part of ip release");
                success = false;
            }
        } catch (ResourceUnavailableException e) {
            s_logger.warn("Unable to revoke all firewall rules for ip id=" + ipId + " as a part of ip release", e);
            success = false;
        }

        // Revoke all PF/Static nat rules for the ip
        try {
            s_logger.debug("Revoking all " + Purpose.PortForwarding + "/" + Purpose.StaticNat + " rules as a part of public IP id=" + ipId + " release...");
            if (!_rulesMgr.revokeAllPFAndStaticNatRulesForIp(ipId, userId, caller)) {
                s_logger.warn("Unable to revoke all the port forwarding rules for ip id=" + ipId + " as a part of ip release");
                success = false;
            }
        } catch (ResourceUnavailableException e) {
            s_logger.warn("Unable to revoke all the port forwarding rules for ip id=" + ipId + " as a part of ip release", e);
            success = false;
        }

        s_logger.debug("Revoking all " + Purpose.LoadBalancing + " rules as a part of public IP id=" + ipId + " release...");
        if (!_lbMgr.removeAllLoadBalanacersForIp(ipId, caller, userId)) {
            s_logger.warn("Unable to revoke all the load balancer rules for ip id=" + ipId + " as a part of ip release");
            success = false;
        }

        // remote access vpn can be enabled only for static nat ip, so this part should never be executed under normal
        // conditions
        // only when ip address failed to be cleaned up as a part of account destroy and was marked as Releasing, this part of
        // the code would be triggered
        s_logger.debug("Cleaning up remote access vpns as a part of public IP id=" + ipId + " release...");
        try {
            _vpnMgr.destroyRemoteAccessVpnForIp(ipId, caller);
        } catch (ResourceUnavailableException e) {
            s_logger.warn("Unable to destroy remote access vpn for ip id=" + ipId + " as a part of ip release", e);
            success = false;
        }

        return success;
    }

    @Override
    @DB
    public boolean disassociatePublicIpAddress(long addrId, long userId, Account caller) {

        boolean success = true;
        // Cleanup all ip address resources - PF/LB/Static nat rules
        if (!cleanupIpResources(addrId, userId, caller)) {
            success = false;
            s_logger.warn("Failed to release resources for ip address id=" + addrId);
        }

        IPAddressVO ip = markIpAsUnavailable(addrId);

        assert (ip != null) : "Unable to mark the ip address id=" + addrId + " as unavailable.";
        if (ip == null) {
            return true;
        }

        if (s_logger.isDebugEnabled()) {
            s_logger.debug("Releasing ip id=" + addrId + "; sourceNat = " + ip.isSourceNat());
        }

        if (ip.getAssociatedWithNetworkId() != null) {
            Network network = _networksDao.findById(ip.getAssociatedWithNetworkId());
            try {
                if (!applyIpAssociations(network, true)) {
                    s_logger.warn("Unable to apply ip address associations for " + network);
                    success = false;
                }
            } catch (ResourceUnavailableException e) {
                throw new CloudRuntimeException("We should never get to here because we used true when applyIpAssociations", e);
            }
        } else {
            if (ip.getState() == IpAddress.State.Releasing) {
                _ipAddressDao.unassignIpAddress(ip.getId());
            }
        }

        if (success) {
            if (ip.isPortable()) {
                releasePortableIpAddress(addrId);
            }
            s_logger.debug("Released a public ip id=" + addrId);
        }

        return success;
    }

    @DB
    @Override
    public boolean releasePortableIpAddress(long addrId) {
        Transaction txn = Transaction.currentTxn();
        GlobalLock portableIpLock = GlobalLock.getInternLock("PortablePublicIpRange");

        txn.start();
        try {
            portableIpLock.lock(5);
            IPAddressVO ip = _ipAddressDao.findById(addrId);

            // unassign portable IP
            PortableIpVO portableIp = _portableIpDao.findByIpAddress(ip.getAddress().addr());
            _portableIpDao.unassignIpAddress(portableIp.getId());

            // removed the provisioned vlan
            VlanVO vlan = _vlanDao.findById(ip.getVlanId());
            _vlanDao.remove(vlan.getId());

            // remove the provisioned public ip address
            _ipAddressDao.remove(ip.getId());

            txn.commit();
            return true;
        } finally {
            portableIpLock.releaseRef();
        }
    }

    @Override
    public PublicIp assignPublicIpAddress(long dcId, Long podId, Account owner, VlanType type, Long networkId, String requestedIp, boolean isSystem)
        throws InsufficientAddressCapacityException {
        return fetchNewPublicIp(dcId, podId, null, owner, type, networkId, false, true, requestedIp, isSystem, null);
    }

    @Override
    public PublicIp assignPublicIpAddressFromVlans(long dcId, Long podId, Account owner, VlanType type, List<Long> vlanDbIds, Long networkId, String requestedIp, boolean isSystem)
        throws InsufficientAddressCapacityException {
        return fetchNewPublicIp(dcId, podId, vlanDbIds, owner, type, networkId, false, true, requestedIp, isSystem, null);
    }

    @DB
    public PublicIp fetchNewPublicIp(long dcId, Long podId, List<Long> vlanDbIds, Account owner, VlanType vlanUse, Long guestNetworkId, boolean sourceNat, boolean assign,
        String requestedIp, boolean isSystem, Long vpcId) throws InsufficientAddressCapacityException {
        StringBuilder errorMessage = new StringBuilder("Unable to get ip adress in ");
        boolean fetchFromDedicatedRange = false;
        List<Long> dedicatedVlanDbIds = new ArrayList<Long>();
        List<Long> nonDedicatedVlanDbIds = new ArrayList<Long>();

        Transaction txn = Transaction.currentTxn();
        txn.start();
        SearchCriteria<IPAddressVO> sc = null;
        if (podId != null) {
            sc = AssignIpAddressFromPodVlanSearch.create();
            sc.setJoinParameters("podVlanMapSB", "podId", podId);
            errorMessage.append(" pod id=" + podId);
        } else {
            sc = AssignIpAddressSearch.create();
            errorMessage.append(" zone id=" + dcId);
        }

        // If owner has dedicated Public IP ranges, fetch IP from the dedicated range
        // Otherwise fetch IP from the system pool
        List<AccountVlanMapVO> maps = _accountVlanMapDao.listAccountVlanMapsByAccount(owner.getId());
        for (AccountVlanMapVO map : maps) {
            if (vlanDbIds == null || vlanDbIds.contains(map.getVlanDbId()))
                dedicatedVlanDbIds.add(map.getVlanDbId());
        }
        List<VlanVO> nonDedicatedVlans = _vlanDao.listZoneWideNonDedicatedVlans(dcId);
        for (VlanVO nonDedicatedVlan : nonDedicatedVlans) {
            if (vlanDbIds == null || vlanDbIds.contains(nonDedicatedVlan.getId()))
                nonDedicatedVlanDbIds.add(nonDedicatedVlan.getId());
        }
        if (dedicatedVlanDbIds != null && !dedicatedVlanDbIds.isEmpty()) {
            fetchFromDedicatedRange = true;
            sc.setParameters("vlanId", dedicatedVlanDbIds.toArray());
            errorMessage.append(", vlanId id=" + dedicatedVlanDbIds.toArray());
        } else if (nonDedicatedVlanDbIds != null && !nonDedicatedVlanDbIds.isEmpty()) {
            sc.setParameters("vlanId", nonDedicatedVlanDbIds.toArray());
            errorMessage.append(", vlanId id=" + nonDedicatedVlanDbIds.toArray());
        } else {
            if (podId != null) {
                InsufficientAddressCapacityException ex = new InsufficientAddressCapacityException("Insufficient address capacity", Pod.class, podId);
                ex.addProxyObject(ApiDBUtils.findPodById(podId).getUuid());
                throw ex;
            }
            s_logger.warn(errorMessage.toString());
            InsufficientAddressCapacityException ex = new InsufficientAddressCapacityException("Insufficient address capacity", DataCenter.class, dcId);
            ex.addProxyObject(ApiDBUtils.findZoneById(dcId).getUuid());
            throw ex;
        }

        sc.setParameters("dc", dcId);

        DataCenter zone = _entityMgr.findById(DataCenter.class, dcId);

        // for direct network take ip addresses only from the vlans belonging to the network
        if (vlanUse == VlanType.DirectAttached) {
            sc.setJoinParameters("vlan", "networkId", guestNetworkId);
            errorMessage.append(", network id=" + guestNetworkId);
        }
        sc.setJoinParameters("vlan", "type", vlanUse);

        if (requestedIp != null) {
            sc.addAnd("address", SearchCriteria.Op.EQ, requestedIp);
            errorMessage.append(": requested ip " + requestedIp + " is not available");
        }

        Filter filter = new Filter(IPAddressVO.class, "vlanId", true, 0l, 1l);

        List<IPAddressVO> addrs = _ipAddressDao.lockRows(sc, filter, true);

        // If all the dedicated IPs of the owner are in use fetch an IP from the system pool
        if (addrs.size() == 0 && fetchFromDedicatedRange) {
            // Verify if account is allowed to acquire IPs from the system
            boolean useSystemIps = UseSystemPublicIps.valueIn(owner.getId());
            if (useSystemIps && nonDedicatedVlanDbIds != null && !nonDedicatedVlanDbIds.isEmpty()) {
                fetchFromDedicatedRange = false;
                sc.setParameters("vlanId", nonDedicatedVlanDbIds.toArray());
                errorMessage.append(", vlanId id=" + nonDedicatedVlanDbIds.toArray());
                addrs = _ipAddressDao.lockRows(sc, filter, true);
            }
        }

        if (addrs.size() == 0) {
            if (podId != null) {
                InsufficientAddressCapacityException ex = new InsufficientAddressCapacityException("Insufficient address capacity", Pod.class, podId);
                // for now, we hardcode the table names, but we should ideally do a lookup for the tablename from the VO object.
                ex.addProxyObject(ApiDBUtils.findPodById(podId).getUuid());
                throw ex;
            }
            s_logger.warn(errorMessage.toString());
            InsufficientAddressCapacityException ex = new InsufficientAddressCapacityException("Insufficient address capacity", DataCenter.class, dcId);
            ex.addProxyObject(ApiDBUtils.findZoneById(dcId).getUuid());
            throw ex;
        }

        assert (addrs.size() == 1) : "Return size is incorrect: " + addrs.size();

        if (!fetchFromDedicatedRange) {
            // Check that the maximum number of public IPs for the given accountId will not be exceeded
            try {
                _resourceLimitMgr.checkResourceLimit(owner, ResourceType.public_ip);
            } catch (ResourceAllocationException ex) {
                s_logger.warn("Failed to allocate resource of type " + ex.getResourceType() + " for account " + owner);
                throw new AccountLimitException("Maximum number of public IP addresses for account: " + owner.getAccountName() + " has been exceeded.");
            }
        }

        IPAddressVO addr = addrs.get(0);
        addr.setSourceNat(sourceNat);
        addr.setAllocatedTime(new Date());
        addr.setAllocatedInDomainId(owner.getDomainId());
        addr.setAllocatedToAccountId(owner.getId());
        addr.setSystem(isSystem);

        if (assign) {
            markPublicIpAsAllocated(addr);
        } else {
            addr.setState(IpAddress.State.Allocating);
        }
        addr.setState(assign ? IpAddress.State.Allocated : IpAddress.State.Allocating);

        if (vlanUse != VlanType.DirectAttached) {
            addr.setAssociatedWithNetworkId(guestNetworkId);
            addr.setVpcId(vpcId);
        }

        _ipAddressDao.update(addr.getId(), addr);

        txn.commit();

        if (vlanUse == VlanType.VirtualNetwork) {
            _firewallMgr.addSystemFirewallRules(addr, owner);
        }

        return PublicIp.createFromAddrAndVlan(addr, _vlanDao.findById(addr.getVlanId()));
    }

    @DB
    @Override
    public void markPublicIpAsAllocated(IPAddressVO addr) {

        assert (addr.getState() == IpAddress.State.Allocating || addr.getState() == IpAddress.State.Free) : "Unable to transition from state " + addr.getState() + " to " +
                                                                                                            IpAddress.State.Allocated;

        Transaction txn = Transaction.currentTxn();

        Account owner = _accountMgr.getAccount(addr.getAllocatedToAccountId());

        txn.start();
        addr.setState(IpAddress.State.Allocated);
        _ipAddressDao.update(addr.getId(), addr);

        // Save usage event
        if (owner.getAccountId() != Account.ACCOUNT_ID_SYSTEM) {
            VlanVO vlan = _vlanDao.findById(addr.getVlanId());

            String guestType = vlan.getVlanType().toString();

            if (!isIpDedicated(addr)) {
                UsageEventUtils.publishUsageEvent(EventTypes.EVENT_NET_IP_ASSIGN,
                    owner.getId(),
                    addr.getDataCenterId(),
                    addr.getId(),
                    addr.getAddress().toString(),
                    addr.isSourceNat(),
                    guestType,
                    addr.getSystem(),
                    addr.getClass().getName(),
                    addr.getUuid());
            }

            if (updateIpResourceCount(addr)) {
                _resourceLimitMgr.incrementResourceCount(owner.getId(), ResourceType.public_ip);
            }
        }

        txn.commit();
    }

    private boolean isIpDedicated(IPAddressVO addr) {
        List<AccountVlanMapVO> maps = _accountVlanMapDao.listAccountVlanMapsByVlan(addr.getVlanId());
        if (maps != null && !maps.isEmpty())
            return true;
        return false;
    }

    @Override
    public PublicIp assignSourceNatIpAddressToGuestNetwork(Account owner, Network guestNetwork) throws InsufficientAddressCapacityException, ConcurrentOperationException {
        assert (guestNetwork.getTrafficType() != null) : "You're asking for a source nat but your network "
                                                         + "can't participate in source nat.  What do you have to say for yourself?";
        long dcId = guestNetwork.getDataCenterId();

        IPAddressVO sourceNatIp = getExistingSourceNatInNetwork(owner.getId(), guestNetwork.getId());

        PublicIp ipToReturn = null;
        if (sourceNatIp != null) {
            ipToReturn = PublicIp.createFromAddrAndVlan(sourceNatIp, _vlanDao.findById(sourceNatIp.getVlanId()));
        } else {
            ipToReturn = assignDedicateIpAddress(owner, guestNetwork.getId(), null, dcId, true);
        }

        return ipToReturn;
    }

    @DB
    @Override
    public PublicIp assignDedicateIpAddress(Account owner, Long guestNtwkId, Long vpcId, long dcId, boolean isSourceNat) throws ConcurrentOperationException,
        InsufficientAddressCapacityException {

        long ownerId = owner.getId();

        PublicIp ip = null;
        Transaction txn = Transaction.currentTxn();
        try {
            txn.start();

            owner = _accountDao.acquireInLockTable(ownerId);

            if (owner == null) {
                // this ownerId comes from owner or type Account. See the class "AccountVO" and the annotations in that class
                // to get the table name and field name that is queried to fill this ownerid.
                ConcurrentOperationException ex = new ConcurrentOperationException("Unable to lock account");
                throw ex;
            }
            if (s_logger.isDebugEnabled()) {
                s_logger.debug("lock account " + ownerId + " is acquired");
            }

            ip = fetchNewPublicIp(dcId, null, null, owner, VlanType.VirtualNetwork, guestNtwkId, isSourceNat, false, null, false, vpcId);
            IPAddressVO publicIp = ip.ip();

            markPublicIpAsAllocated(publicIp);
            _ipAddressDao.update(publicIp.getId(), publicIp);

            txn.commit();
            return ip;
        } finally {
            if (owner != null) {
                if (s_logger.isDebugEnabled()) {
                    s_logger.debug("Releasing lock account " + ownerId);
                }

                _accountDao.releaseFromLockTable(ownerId);
            }
            if (ip == null) {
                txn.rollback();
                s_logger.error("Unable to get source nat ip address for account " + ownerId);
            }
        }
    }

    @Override
    public boolean applyIpAssociations(Network network, boolean continueOnError) throws ResourceUnavailableException {
        List<IPAddressVO> userIps = _ipAddressDao.listByAssociatedNetwork(network.getId(), null);
        boolean success = true;

        // CloudStack will take a lazy approach to associate an acquired public IP to a network service provider as
        // it will not know what service an acquired IP will be used for. An IP is actually associated with a provider when first
        // rule is applied. Similarly when last rule on the acquired IP is revoked, IP is not associated with any provider
        // but still be associated with the account. At this point just mark IP as allocated or released.
        for (IPAddressVO addr : userIps) {
            if (addr.getState() == IpAddress.State.Allocating) {
                addr.setAssociatedWithNetworkId(network.getId());
                markPublicIpAsAllocated(addr);
            } else if (addr.getState() == IpAddress.State.Releasing) {
                // Cleanup all the resources for ip address if there are any, and only then un-assign ip in the system
                if (cleanupIpResources(addr.getId(), Account.ACCOUNT_ID_SYSTEM, _accountMgr.getSystemAccount())) {
                    _ipAddressDao.unassignIpAddress(addr.getId());
                } else {
                    success = false;
                    s_logger.warn("Failed to release resources for ip address id=" + addr.getId());
                }
            }
        }

        return success;
    }

    // CloudStack will take a lazy approach to associate an acquired public IP to a network service provider as
    // it will not know what a acquired IP will be used for. An IP is actually associated with a provider when first
    // rule is applied. Similarly when last rule on the acquired IP is revoked, IP is not associated with any provider
    // but still be associated with the account. Its up to caller of this function to decide when to invoke IPAssociation
    @Override
    public boolean applyIpAssociations(Network network, boolean postApplyRules, boolean continueOnError, List<? extends PublicIpAddress> publicIps)
        throws ResourceUnavailableException {
        boolean success = true;

        Map<PublicIpAddress, Set<Service>> ipToServices = _networkModel.getIpToServices(publicIps, postApplyRules, true);
        Map<Provider, ArrayList<PublicIpAddress>> providerToIpList = _networkModel.getProviderToIpList(network, ipToServices);

        for (Provider provider : providerToIpList.keySet()) {
            try {
                ArrayList<PublicIpAddress> ips = providerToIpList.get(provider);
                if (ips == null || ips.isEmpty()) {
                    continue;
                }
                IpDeployer deployer = null;
                NetworkElement element = _networkModel.getElementImplementingProvider(provider.getName());
                if (!(element instanceof IpDeployingRequester)) {
                    throw new CloudRuntimeException("Element " + element + " is not a IpDeployingRequester!");
                }
                deployer = ((IpDeployingRequester)element).getIpDeployer(network);
                if (deployer == null) {
                    throw new CloudRuntimeException("Fail to get ip deployer for element: " + element);
                }
                Set<Service> services = new HashSet<Service>();
                for (PublicIpAddress ip : ips) {
                    if (!ipToServices.containsKey(ip)) {
                        continue;
                    }
                    services.addAll(ipToServices.get(ip));
                }
                deployer.applyIps(network, ips, services);
            } catch (ResourceUnavailableException e) {
                success = false;
                if (!continueOnError) {
                    throw e;
                } else {
                    s_logger.debug("Resource is not available: " + provider.getName(), e);
                }
            }
        }

        return success;
    }

    @DB
    @Override
    public IpAddress allocateIp(Account ipOwner, boolean isSystem, Account caller, long callerUserId, DataCenter zone) throws ConcurrentOperationException,
        ResourceAllocationException, InsufficientAddressCapacityException {

        VlanType vlanType = VlanType.VirtualNetwork;
        boolean assign = false;

        if (Grouping.AllocationState.Disabled == zone.getAllocationState() && !_accountMgr.isRootAdmin(caller.getType())) {
            // zone is of type DataCenter. See DataCenterVO.java.
            PermissionDeniedException ex = new PermissionDeniedException("Cannot perform this operation, " + "Zone is currently disabled");
            ex.addProxyObject(zone.getUuid(), "zoneId");
            throw ex;
        }

        PublicIp ip = null;

        Transaction txn = Transaction.currentTxn();
        Account accountToLock = null;
        try {
            if (s_logger.isDebugEnabled()) {
                s_logger.debug("Associate IP address called by the user " + callerUserId + " account " + ipOwner.getId());
            }
            accountToLock = _accountDao.acquireInLockTable(ipOwner.getId());
            if (accountToLock == null) {
                s_logger.warn("Unable to lock account: " + ipOwner.getId());
                throw new ConcurrentOperationException("Unable to acquire account lock");
            }

            if (s_logger.isDebugEnabled()) {
                s_logger.debug("Associate IP address lock acquired");
            }

            txn.start();

            ip = fetchNewPublicIp(zone.getId(), null, null, ipOwner, vlanType, null, false, assign, null, isSystem, null);

            if (ip == null) {
                InsufficientAddressCapacityException ex = new InsufficientAddressCapacityException("Unable to find available public IP addresses", DataCenter.class, zone.getId());
                ex.addProxyObject(ApiDBUtils.findZoneById(zone.getId()).getUuid());
                throw ex;
            }
            CallContext.current().setEventDetails("Ip Id: " + ip.getId());
            Ip ipAddress = ip.getAddress();

            s_logger.debug("Got " + ipAddress + " to assign for account " + ipOwner.getId() + " in zone " + zone.getId());

            txn.commit();
        } finally {
            if (accountToLock != null) {
                if (s_logger.isDebugEnabled()) {
                    s_logger.debug("Releasing lock account " + ipOwner);
                }
                _accountDao.releaseFromLockTable(ipOwner.getId());
                s_logger.debug("Associate IP address lock released");
            }
        }
        return ip;
    }

    @Override
    @DB
    public IpAddress allocatePortableIp(Account ipOwner, Account caller, long dcId, Long networkId, Long vpcID) throws ConcurrentOperationException, ResourceAllocationException,
        InsufficientAddressCapacityException {

        Transaction txn = Transaction.currentTxn();
        GlobalLock portableIpLock = GlobalLock.getInternLock("PortablePublicIpRange");
        PortableIpVO allocatedPortableIp;
        IPAddressVO ipaddr;

        try {
            portableIpLock.lock(5);

            txn.start();

            List<PortableIpVO> portableIpVOs = _portableIpDao.listByRegionIdAndState(1, PortableIp.State.Free);
            if (portableIpVOs == null || portableIpVOs.isEmpty()) {
                InsufficientAddressCapacityException ex = new InsufficientAddressCapacityException("Unable to find available portable IP addresses", Region.class, new Long(1));
                throw ex;
            }

            // allocate first portable IP to the user
            allocatedPortableIp = portableIpVOs.get(0);
            allocatedPortableIp.setAllocatedTime(new Date());
            allocatedPortableIp.setAllocatedToAccountId(ipOwner.getAccountId());
            allocatedPortableIp.setAllocatedInDomainId(ipOwner.getDomainId());
            allocatedPortableIp.setState(PortableIp.State.Allocated);
            _portableIpDao.update(allocatedPortableIp.getId(), allocatedPortableIp);

            // To make portable IP available as a zone level resource we need to emulate portable IP's (which are
            // provisioned at region level) as public IP provisioned in a zone. user_ip_address and vlan combo give the
            // identity of a public IP in zone. Create entry for portable ip in these tables.

            // provision portable IP range VLAN into the zone
            long physicalNetworkId = _networkModel.getDefaultPhysicalNetworkByZoneAndTrafficType(dcId, TrafficType.Public).getId();
            Network network = _networkModel.getSystemNetworkByZoneAndTrafficType(dcId, TrafficType.Public);
            String range = allocatedPortableIp.getAddress() + "-" + allocatedPortableIp.getAddress();
            VlanVO vlan = new VlanVO(VlanType.VirtualNetwork,
                allocatedPortableIp.getVlan(),
                allocatedPortableIp.getGateway(),
                allocatedPortableIp.getNetmask(),
                dcId,
                range,
                network.getId(),
                physicalNetworkId,
                null,
                null,
                null);
            vlan = _vlanDao.persist(vlan);

            // provision the portable IP in to user_ip_address table
            ipaddr = new IPAddressVO(new Ip(allocatedPortableIp.getAddress()), dcId, networkId, vpcID, physicalNetworkId, network.getId(), vlan.getId(), true);
            ipaddr.setState(State.Allocated);
            ipaddr.setAllocatedTime(new Date());
            ipaddr.setAllocatedInDomainId(ipOwner.getDomainId());
            ipaddr.setAllocatedToAccountId(ipOwner.getId());
            ipaddr = _ipAddressDao.persist(ipaddr);

            UsageEventUtils.publishUsageEvent(EventTypes.EVENT_PORTABLE_IP_ASSIGN,
                ipaddr.getId(),
                ipaddr.getDataCenterId(),
                ipaddr.getId(),
                ipaddr.getAddress().toString(),
                ipaddr.isSourceNat(),
                null,
                ipaddr.getSystem(),
                ipaddr.getClass().getName(),
                ipaddr.getUuid());

            txn.commit();

        } finally {
            portableIpLock.unlock();
        }

        return ipaddr;
    }

    protected IPAddressVO getExistingSourceNatInNetwork(long ownerId, Long networkId) {

        List<? extends IpAddress> addrs = _networkModel.listPublicIpsAssignedToGuestNtwk(ownerId, networkId, true);

        IPAddressVO sourceNatIp = null;
        if (addrs.isEmpty()) {
            return null;
        } else {
            // Account already has ip addresses
            for (IpAddress addr : addrs) {
                if (addr.isSourceNat()) {
                    sourceNatIp = _ipAddressDao.findById(addr.getId());
                    return sourceNatIp;
                }
            }

            assert (sourceNatIp != null) : "How do we get a bunch of ip addresses but none of them are source nat? " + "account=" + ownerId + "; networkId=" + networkId;
        }

        return sourceNatIp;
    }

    @DB
    @Override
    public IPAddressVO associateIPToGuestNetwork(long ipId, long networkId, boolean releaseOnFailure) throws ResourceAllocationException, ResourceUnavailableException,
        InsufficientAddressCapacityException, ConcurrentOperationException {
        Account caller = CallContext.current().getCallingAccount();
        Account owner = null;

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

            DataCenter zone = _entityMgr.findById(DataCenter.class, network.getDataCenterId());
            if (zone.getNetworkType() == NetworkType.Advanced) {
                if (network.getGuestType() == Network.GuestType.Shared) {
                    if (isSharedNetworkOfferingWithServices(network.getNetworkOfferingId())) {
                        _accountMgr.checkAccess(CallContext.current().getCallingAccount(), AccessType.UseNetwork, false, network);
                    } else {
                        throw new InvalidParameterValueException("IP can be associated with guest network of 'shared' type only if "
                                                                 + "network services Source Nat, Static Nat, Port Forwarding, Load balancing, firewall are enabled in the network");
                    }
                }
            } else {
                _accountMgr.checkAccess(caller, null, true, ipToAssoc);
            }
            owner = _accountMgr.getAccount(ipToAssoc.getAllocatedToAccountId());
        } else {
            s_logger.debug("Unable to find ip address by id: " + ipId);
            return null;
        }

        if (ipToAssoc.getAssociatedWithNetworkId() != null) {
            s_logger.debug("IP " + ipToAssoc + " is already assocaited with network id" + networkId);
            return ipToAssoc;
        }

        Network network = _networksDao.findById(networkId);
        if (network != null) {
            _accountMgr.checkAccess(owner, AccessType.UseNetwork, false, network);
        } else {
            s_logger.debug("Unable to find ip address by id: " + ipId);
            return null;
        }

        DataCenter zone = _entityMgr.findById(DataCenter.class, network.getDataCenterId());

        // allow associating IP addresses to guest network only
        if (network.getTrafficType() != TrafficType.Guest) {
            throw new InvalidParameterValueException("Ip address can be associated to the network with trafficType " + TrafficType.Guest);
        }

        // Check that network belongs to IP owner - skip this check
        //     - if zone is basic zone as there is just one guest network,
        //     - if shared network in Advanced zone
        //     - and it belongs to the system
        if (network.getAccountId() != owner.getId()) {
            if (zone.getNetworkType() != NetworkType.Basic && !(zone.getNetworkType() == NetworkType.Advanced && network.getGuestType() == Network.GuestType.Shared)) {
                throw new InvalidParameterValueException("The owner of the network is not the same as owner of the IP");
            }
        }

        // In Advance zone only allow to do IP assoc
        //      - for Isolated networks with source nat service enabled
        //      - for shared networks with source nat service enabled
        if (zone.getNetworkType() == NetworkType.Advanced && !(_networkModel.areServicesSupportedInNetwork(network.getId(), Service.SourceNat))) {
            throw new InvalidParameterValueException("In zone of type " + NetworkType.Advanced + " ip address can be associated only to the network of guest type " +
                                                     GuestType.Isolated + " with the " + Service.SourceNat.getName() + " enabled");
        }

        NetworkOffering offering = _networkOfferingDao.findById(network.getNetworkOfferingId());
        boolean sharedSourceNat = offering.getSharedSourceNat();
        boolean isSourceNat = false;
        if (!sharedSourceNat) {
            if (getExistingSourceNatInNetwork(owner.getId(), networkId) == null) {
                if (network.getGuestType() == GuestType.Isolated && network.getVpcId() == null && !ipToAssoc.isPortable()) {
                    isSourceNat = true;
                }
            }
        }

        s_logger.debug("Associating ip " + ipToAssoc + " to network " + network);

        IPAddressVO ip = _ipAddressDao.findById(ipId);
        //update ip address with networkId
        ip.setAssociatedWithNetworkId(networkId);
        ip.setSourceNat(isSourceNat);
        _ipAddressDao.update(ipId, ip);

        boolean success = false;
        try {
            success = applyIpAssociations(network, false);
            if (success) {
                s_logger.debug("Successfully associated ip address " + ip.getAddress().addr() + " to network " + network);
            } else {
                s_logger.warn("Failed to associate ip address " + ip.getAddress().addr() + " to network " + network);
            }
            return ip;
        } finally {
            if (!success && releaseOnFailure) {
                if (ip != null) {
                    try {
                        s_logger.warn("Failed to associate ip address, so releasing ip from the database " + ip);
                        _ipAddressDao.markAsUnavailable(ip.getId());
                        if (!applyIpAssociations(network, true)) {
                            // if fail to apply ip assciations again, unassign ip address without updating resource
                            // count and generating usage event as there is no need to keep it in the db
                            _ipAddressDao.unassignIpAddress(ip.getId());
                        }
                    } catch (Exception e) {
                        s_logger.warn("Unable to disassociate ip address for recovery", e);
                    }
                }
            }
        }
    }

    protected boolean isSharedNetworkOfferingWithServices(long networkOfferingId) {
        NetworkOfferingVO networkOffering = _networkOfferingDao.findById(networkOfferingId);
        if ((networkOffering.getGuestType() == Network.GuestType.Shared) &&
            (_networkModel.areServicesSupportedByNetworkOffering(networkOfferingId, Service.SourceNat) ||
             _networkModel.areServicesSupportedByNetworkOffering(networkOfferingId, Service.StaticNat) ||
             _networkModel.areServicesSupportedByNetworkOffering(networkOfferingId, Service.Firewall) ||
             _networkModel.areServicesSupportedByNetworkOffering(networkOfferingId, Service.PortForwarding) || _networkModel.areServicesSupportedByNetworkOffering(networkOfferingId,
                Service.Lb))) {
            return true;
        }
        return false;
    }

    @Override
    public IPAddressVO associatePortableIPToGuestNetwork(long ipAddrId, long networkId, boolean releaseOnFailure) throws ResourceAllocationException, ResourceUnavailableException,
        InsufficientAddressCapacityException, ConcurrentOperationException {
        return associateIPToGuestNetwork(ipAddrId, networkId, releaseOnFailure);
    }

    @DB
    @Override
    public IPAddressVO disassociatePortableIPToGuestNetwork(long ipId, long networkId) throws ResourceAllocationException, ResourceUnavailableException,
        InsufficientAddressCapacityException, ConcurrentOperationException {

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

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

        IPAddressVO ipToAssoc = _ipAddressDao.findById(ipId);
        if (ipToAssoc != null) {

            if (ipToAssoc.getAssociatedWithNetworkId() == null) {
                throw new InvalidParameterValueException("IP " + ipToAssoc + " is not associated with any network");
            }

            if (ipToAssoc.getAssociatedWithNetworkId() != network.getId()) {
                throw new InvalidParameterValueException("IP " + ipToAssoc + " is not associated with network id" + networkId);
            }

            DataCenter zone = _entityMgr.findById(DataCenter.class, network.getDataCenterId());
            if (zone.getNetworkType() == NetworkType.Advanced) {
                if (network.getGuestType() == Network.GuestType.Shared) {
                    assert (isSharedNetworkOfferingWithServices(network.getNetworkOfferingId()));
                    _accountMgr.checkAccess(CallContext.current().getCallingAccount(), AccessType.UseNetwork, false, network);
                }
            } else {
                _accountMgr.checkAccess(caller, null, true, ipToAssoc);
            }
            owner = _accountMgr.getAccount(ipToAssoc.getAllocatedToAccountId());
        } else {
            s_logger.debug("Unable to find ip address by id: " + ipId);
            return null;
        }

        DataCenter zone = _entityMgr.findById(DataCenter.class, network.getDataCenterId());

        // Check that network belongs to IP owner - skip this check
        //     - if zone is basic zone as there is just one guest network,
        //     - if shared network in Advanced zone
        //     - and it belongs to the system
        if (network.getAccountId() != owner.getId()) {
            if (zone.getNetworkType() != NetworkType.Basic && !(zone.getNetworkType() == NetworkType.Advanced && network.getGuestType() == Network.GuestType.Shared)) {
                throw new InvalidParameterValueException("The owner of the network is not the same as owner of the IP");
            }
        }

        // Check if IP has any services (rules) associated in the network
        List<PublicIpAddress> ipList = new ArrayList<PublicIpAddress>();
        PublicIp publicIp = PublicIp.createFromAddrAndVlan(ipToAssoc, _vlanDao.findById(ipToAssoc.getVlanId()));
        ipList.add(publicIp);
        Map<PublicIpAddress, Set<Service>> ipToServices = _networkModel.getIpToServices(ipList, false, true);
        if (ipToServices != null & !ipToServices.isEmpty()) {
            Set<Service> services = ipToServices.get(publicIp);
            if (services != null && !services.isEmpty()) {
                throw new InvalidParameterValueException("IP " + ipToAssoc + " has services and rules associated in the network " + networkId);
            }
        }

        IPAddressVO ip = _ipAddressDao.findById(ipId);
        ip.setAssociatedWithNetworkId(null);
        _ipAddressDao.update(ipId, ip);

        try {
            boolean success = applyIpAssociations(network, false);
            if (success) {
                s_logger.debug("Successfully associated ip address " + ip.getAddress().addr() + " to network " + network);
            } else {
                s_logger.warn("Failed to associate ip address " + ip.getAddress().addr() + " to network " + network);
            }
            return ip;
        } finally {

        }
    }

    @Override
    public boolean isPortableIpTransferableFromNetwork(long ipAddrId, long networkId) {
        Network network = _networksDao.findById(networkId);
        if (network == null) {
            throw new InvalidParameterValueException("Invalid network id is given");
        }

        IPAddressVO ip = _ipAddressDao.findById(ipAddrId);
        if (ip == null) {
            throw new InvalidParameterValueException("Invalid network id is given");
        }

        // Check if IP has any services (rules) associated in the network
        List<PublicIpAddress> ipList = new ArrayList<PublicIpAddress>();
        PublicIp publicIp = PublicIp.createFromAddrAndVlan(ip, _vlanDao.findById(ip.getVlanId()));
        ipList.add(publicIp);
        Map<PublicIpAddress, Set<Service>> ipToServices = _networkModel.getIpToServices(ipList, false, true);
        if (ipToServices != null & !ipToServices.isEmpty()) {
            Set<Service> ipServices = ipToServices.get(publicIp);
            if (ipServices != null && !ipServices.isEmpty()) {
                return false;
            }
        }

        return true;
    }

    @DB
    @Override
    public void transferPortableIP(long ipAddrId, long currentNetworkId, long newNetworkId) throws ResourceAllocationException, ResourceUnavailableException,
        InsufficientAddressCapacityException, ConcurrentOperationException {

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

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

        IPAddressVO ip = _ipAddressDao.findById(ipAddrId);
        if (ip == null) {
            throw new InvalidParameterValueException("Invalid portable ip address id is given");
        }

        Transaction txn = Transaction.currentTxn();

        assert (isPortableIpTransferableFromNetwork(ipAddrId, currentNetworkId));

        // disassociate portable IP with current network/VPC network
        if (srcNetwork.getVpcId() != null) {
            _vpcMgr.unassignIPFromVpcNetwork(ipAddrId, currentNetworkId);
        } else {
            disassociatePortableIPToGuestNetwork(ipAddrId, currentNetworkId);
        }

        // If portable IP need to be transferred across the zones, then mark the entry corresponding to portable ip
        // in user_ip_address and vlan tables so as to emulate portable IP as provisioned in destination data center
        if (srcNetwork.getDataCenterId() != dstNetwork.getDataCenterId()) {
            txn.start();

            long physicalNetworkId = _networkModel.getDefaultPhysicalNetworkByZoneAndTrafficType(dstNetwork.getDataCenterId(), TrafficType.Public).getId();
            long publicNetworkId = _networkModel.getSystemNetworkByZoneAndTrafficType(dstNetwork.getDataCenterId(), TrafficType.Public).getId();

            ip.setDataCenterId(dstNetwork.getDataCenterId());
            ip.setPhysicalNetworkId(physicalNetworkId);
            ip.setSourceNetworkId(publicNetworkId);
            _ipAddressDao.update(ipAddrId, ip);

            VlanVO vlan = _vlanDao.findById(ip.getVlanId());
            vlan.setPhysicalNetworkId(physicalNetworkId);
            vlan.setNetworkId(publicNetworkId);
            vlan.setDataCenterId(dstNetwork.getDataCenterId());
            _vlanDao.update(ip.getVlanId(), vlan);

            txn.commit();
        }

        // associate portable IP with new network/VPC network
        associatePortableIPToGuestNetwork(ipAddrId, newNetworkId, false);

        txn.start();

        if (dstNetwork.getVpcId() != null) {
            ip.setVpcId(dstNetwork.getVpcId());
        } else {
            ip.setVpcId(null);
        }

        _ipAddressDao.update(ipAddrId, ip);

        txn.commit();

        // trigger an action event for the transfer of portable IP across the networks, so that external entities
        // monitoring for this event can initiate the route advertisement for the availability of IP from the zoe
        ActionEventUtils.onActionEvent(User.UID_SYSTEM,
            Account.ACCOUNT_ID_SYSTEM,
            Domain.ROOT_DOMAIN,
            EventTypes.EVENT_PORTABLE_IP_TRANSFER,
            "Portable IP associated is transferred from network " + currentNetworkId + " to " + newNetworkId);
    }

    protected List<? extends Network> getIsolatedNetworksWithSourceNATOwnedByAccountInZone(long zoneId, Account owner) {

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

    @Override
    @DB
    public boolean associateIpAddressListToAccount(long userId, long accountId, long zoneId, Long vlanId, Network guestNetwork) throws InsufficientCapacityException,
        ConcurrentOperationException, ResourceUnavailableException, ResourceAllocationException {
        Account owner = _accountMgr.getActiveAccountById(accountId);
        boolean createNetwork = false;

        if (guestNetwork != null && guestNetwork.getTrafficType() != TrafficType.Guest) {
            throw new InvalidParameterValueException("Network " + guestNetwork + " is not of a type " + TrafficType.Guest);
        }

        Transaction txn = Transaction.currentTxn();
        txn.start();

        if (guestNetwork == null) {
            List<? extends Network> networks = getIsolatedNetworksWithSourceNATOwnedByAccountInZone(zoneId, owner);
            if (networks.size() == 0) {
                createNetwork = true;
            } else if (networks.size() == 1) {
                guestNetwork = networks.get(0);
            } else {
                throw new InvalidParameterValueException("Error, more than 1 Guest Isolated Networks with SourceNAT "
                                                         + "service enabled found for this account, cannot assosiate the IP range, please provide the network ID");
            }
        }

        // create new Virtual network (Isolated with SourceNAT) for the user if it doesn't exist
        List<NetworkOfferingVO> requiredOfferings = _networkOfferingDao.listByAvailability(Availability.Required, false);
        if (requiredOfferings.size() < 1) {
            throw new CloudRuntimeException("Unable to find network offering with availability=" + Availability.Required +
                                            " to automatically create the network as part of createVlanIpRange");
        }
        if (createNetwork) {
            if (requiredOfferings.get(0).getState() == NetworkOffering.State.Enabled) {
                long physicalNetworkId = _networkModel.findPhysicalNetworkId(zoneId, requiredOfferings.get(0).getTags(), requiredOfferings.get(0).getTrafficType());
                // Validate physical network
                PhysicalNetwork physicalNetwork = _physicalNetworkDao.findById(physicalNetworkId);
                if (physicalNetwork == null) {
                    throw new InvalidParameterValueException("Unable to find physical network with id: " + physicalNetworkId + " and tag: " + requiredOfferings.get(0).getTags());
                }

                s_logger.debug("Creating network for account " + owner + " from the network offering id=" + requiredOfferings.get(0).getId() +
                               " as a part of createVlanIpRange process");
                guestNetwork = _networkMgr.createGuestNetwork(requiredOfferings.get(0).getId(),
                    owner.getAccountName() + "-network",
                    owner.getAccountName() + "-network",
                    null,
                    null,
                    null,
                    null,
                    owner,
                    null,
                    physicalNetwork,
                    zoneId,
                    ACLType.Account,
                    null,
                    null,
                    null,
                    null,
                    true,
                    null);
                if (guestNetwork == null) {
                    s_logger.warn("Failed to create default Virtual network for the account " + accountId + "in zone " + zoneId);
                    throw new CloudRuntimeException("Failed to create a Guest Isolated Networks with SourceNAT " +
                                                    "service enabled as a part of createVlanIpRange, for the account " + accountId + "in zone " + zoneId);
                }
            } else {
                throw new CloudRuntimeException("Required network offering id=" + requiredOfferings.get(0).getId() + " is not in " + NetworkOffering.State.Enabled);
            }
        }

        // Check if there is a source nat ip address for this account; if not - we have to allocate one
        boolean allocateSourceNat = false;
        List<IPAddressVO> sourceNat = _ipAddressDao.listByAssociatedNetwork(guestNetwork.getId(), true);
        if (sourceNat.isEmpty()) {
            allocateSourceNat = true;
        }

        // update all ips with a network id, mark them as allocated and update resourceCount/usage
        List<IPAddressVO> ips = _ipAddressDao.listByVlanId(vlanId);
        boolean isSourceNatAllocated = false;
        for (IPAddressVO addr : ips) {
            if (addr.getState() != State.Allocated) {
                if (!isSourceNatAllocated && allocateSourceNat) {
                    addr.setSourceNat(true);
                    isSourceNatAllocated = true;
                } else {
                    addr.setSourceNat(false);
                }
                addr.setAssociatedWithNetworkId(guestNetwork.getId());
                addr.setVpcId(guestNetwork.getVpcId());
                addr.setAllocatedTime(new Date());
                addr.setAllocatedInDomainId(owner.getDomainId());
                addr.setAllocatedToAccountId(owner.getId());
                addr.setSystem(false);
                addr.setState(IpAddress.State.Allocating);
                markPublicIpAsAllocated(addr);
            }
        }

        txn.commit();

        // if the network offering has persistent set to true, implement the network
        if (createNetwork && requiredOfferings.get(0).getIsPersistent()) {
            DataCenter zone = _dcDao.findById(zoneId);
            DeployDestination dest = new DeployDestination(zone, null, null, null);
            Account callerAccount = CallContext.current().getCallingAccount();
            UserVO callerUser = _userDao.findById(CallContext.current().getCallingUserId());
            Journal journal = new Journal.LogJournal("Implementing " + guestNetwork, s_logger);
            ReservationContext context = new ReservationContextImpl(UUID.randomUUID().toString(), journal, callerUser, callerAccount);
            s_logger.debug("Implementing network " + guestNetwork + " as a part of network provision for persistent network");
            try {
                Pair<? extends NetworkGuru, ? extends Network> implementedNetwork = _networkMgr.implementNetwork(guestNetwork.getId(), dest, context);
                if (implementedNetwork.first() == null) {
                    s_logger.warn("Failed to implement the network " + guestNetwork);
                }
                guestNetwork = implementedNetwork.second();
            } catch (Exception ex) {
                s_logger.warn("Failed to implement network " + guestNetwork + " elements and resources as a part of" + " network provision due to ", ex);
                CloudRuntimeException e = new CloudRuntimeException("Failed to implement network (with specified id)"
                                                                    + " elements and resources as a part of network provision for persistent network");
                e.addProxyObject(guestNetwork.getUuid(), "networkId");
                throw e;
            }
        }
        return true;
    }

    @DB
    @Override
    public IPAddressVO markIpAsUnavailable(long addrId) {
        Transaction txn = Transaction.currentTxn();

        IPAddressVO ip = _ipAddressDao.findById(addrId);

        if (ip.getAllocatedToAccountId() == null && ip.getAllocatedTime() == null) {
            s_logger.trace("Ip address id=" + addrId + " is already released");
            return ip;
        }

        if (ip.getState() != State.Releasing) {
            txn.start();

            if (updateIpResourceCount(ip)) {
                _resourceLimitMgr.decrementResourceCount(_ipAddressDao.findById(addrId).getAllocatedToAccountId(), ResourceType.public_ip);
            }

            // Save usage event
            if (ip.getAllocatedToAccountId() != null && ip.getAllocatedToAccountId() != Account.ACCOUNT_ID_SYSTEM) {
                VlanVO vlan = _vlanDao.findById(ip.getVlanId());

                String guestType = vlan.getVlanType().toString();
                if (!isIpDedicated(ip)) {
                    String eventType = ip.isPortable() ? EventTypes.EVENT_PORTABLE_IP_RELEASE : EventTypes.EVENT_NET_IP_RELEASE;
                    UsageEventUtils.publishUsageEvent(eventType,
                        ip.getAllocatedToAccountId(),
                        ip.getDataCenterId(),
                        addrId,
                        ip.getAddress().addr(),
                        ip.isSourceNat(),
                        guestType,
                        ip.getSystem(),
                        ip.getClass().getName(),
                        ip.getUuid());
                }
            }

            ip = _ipAddressDao.markAsUnavailable(addrId);

            txn.commit();
        }

        return ip;
    }

    protected boolean updateIpResourceCount(IPAddressVO ip) {
        // don't increment resource count for direct and dedicated ip addresses
        return (ip.getAssociatedWithNetworkId() != null || ip.getVpcId() != null) && !isIpDedicated(ip);
    }

    @Override
    @DB
    public String acquireGuestIpAddress(Network network, String requestedIp) {
        if (requestedIp != null && requestedIp.equals(network.getGateway())) {
            s_logger.warn("Requested ip address " + requestedIp + " is used as a gateway address in network " + network);
            return null;
        }

        Set<Long> availableIps = _networkModel.getAvailableIps(network, requestedIp);

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

        Long[] array = availableIps.toArray(new Long[availableIps.size()]);

        if (requestedIp != null) {
            // check that requested ip has the same cidr
            String[] cidr = network.getCidr().split("/");
            boolean isSameCidr = NetUtils.sameSubnetCIDR(requestedIp, NetUtils.long2Ip(array[0]), Integer.parseInt(cidr[1]));
            if (!isSameCidr) {
                s_logger.warn("Requested ip address " + requestedIp + " doesn't belong to the network " + network + " cidr");
                return null;
            } else {
                return requestedIp;
            }
        }

        String result;
        do {
            result = NetUtils.long2Ip(array[_rand.nextInt(array.length)]);
        } while (result.split("\\.")[3].equals("1"));
        return result;
    }

    Random _rand = new Random(System.currentTimeMillis());

    @Override
    public boolean applyStaticNats(List<? extends StaticNat> staticNats, boolean continueOnError, boolean forRevoke) throws ResourceUnavailableException {
        Network network = _networksDao.findById(staticNats.get(0).getNetworkId());
        boolean success = true;

        if (staticNats == null || staticNats.size() == 0) {
            s_logger.debug("There are no static nat rules for the network elements");
            return true;
        }

        // get the list of public ip's owned by the network
        List<IPAddressVO> userIps = _ipAddressDao.listByAssociatedNetwork(network.getId(), null);
        List<PublicIp> publicIps = new ArrayList<PublicIp>();
        if (userIps != null && !userIps.isEmpty()) {
            for (IPAddressVO userIp : userIps) {
                PublicIp publicIp = PublicIp.createFromAddrAndVlan(userIp, _vlanDao.findById(userIp.getVlanId()));
                publicIps.add(publicIp);
            }
        }

        // static NAT rules can not programmed unless IP is associated with source NAT service provider, so run IP
        // association for the network so as to ensure IP is associated before applying rules
        if (checkStaticNatIPAssocRequired(network, false, forRevoke, publicIps)) {
            applyIpAssociations(network, false, continueOnError, publicIps);
        }

        // get provider
        StaticNatServiceProvider element = _networkMgr.getStaticNatProviderForNetwork(network);
        try {
            success = element.applyStaticNats(network, staticNats);
        } catch (ResourceUnavailableException e) {
            if (!continueOnError) {
                throw e;
            }
            s_logger.warn("Problems with " + element.getName() + " but pushing on", e);
            success = false;
        }

        // For revoked static nat IP, set the vm_id to null, indicate it should be revoked
        for (StaticNat staticNat : staticNats) {
            if (staticNat.isForRevoke()) {
                for (PublicIp publicIp : publicIps) {
                    if (publicIp.getId() == staticNat.getSourceIpAddressId()) {
                        publicIps.remove(publicIp);
                        IPAddressVO ip = _ipAddressDao.findByIdIncludingRemoved(staticNat.getSourceIpAddressId());
                        // ip can't be null, otherwise something wrong happened
                        ip.setAssociatedWithVmId(null);
                        publicIp = PublicIp.createFromAddrAndVlan(ip, _vlanDao.findById(ip.getVlanId()));
                        publicIps.add(publicIp);
                        break;
                    }
                }
            }
        }

        // if the static NAT rules configured on public IP is revoked then, dis-associate IP with static NAT service provider
        if (checkStaticNatIPAssocRequired(network, true, forRevoke, publicIps)) {
            applyIpAssociations(network, true, continueOnError, publicIps);
        }

        return success;
    }

    // checks if there are any public IP assigned to network, that are marked for one-to-one NAT that
    // needs to be associated/dis-associated with static-nat provider
    boolean checkStaticNatIPAssocRequired(Network network, boolean postApplyRules, boolean forRevoke, List<PublicIp> publicIps) {
        for (PublicIp ip : publicIps) {
            if (ip.isOneToOneNat()) {
                Long activeFwCount = null;
                activeFwCount = _firewallDao.countRulesByIpIdAndState(ip.getId(), FirewallRule.State.Active);

                if (!postApplyRules && !forRevoke) {
                    if (activeFwCount > 0) {
                        continue;
                    } else {
                        return true;
                    }
                } else if (postApplyRules && forRevoke) {
                    return true;
                }
            } else {
                continue;
            }
        }
        return false;
    }

    @Override
    public IpAddress assignSystemIp(long networkId, Account owner, boolean forElasticLb, boolean forElasticIp) throws InsufficientAddressCapacityException {
        Network guestNetwork = _networksDao.findById(networkId);
        NetworkOffering off = _entityMgr.findById(NetworkOffering.class, guestNetwork.getNetworkOfferingId());
        IpAddress ip = null;
        if ((off.getElasticLb() && forElasticLb) || (off.getElasticIp() && forElasticIp)) {

            try {
                s_logger.debug("Allocating system IP address for load balancer rule...");
                // allocate ip
                ip = allocateIP(owner, true, guestNetwork.getDataCenterId());
                // apply ip associations
                ip = associateIPToGuestNetwork(ip.getId(), networkId, true);
                ;
            } catch (ResourceAllocationException ex) {
                throw new CloudRuntimeException("Failed to allocate system ip due to ", ex);
            } catch (ConcurrentOperationException ex) {
                throw new CloudRuntimeException("Failed to allocate system lb ip due to ", ex);
            } catch (ResourceUnavailableException ex) {
                throw new CloudRuntimeException("Failed to allocate system lb ip due to ", ex);
            }

            if (ip == null) {
                throw new CloudRuntimeException("Failed to allocate system ip");
            }
        }

        return ip;
    }

    @Override
    public boolean handleSystemIpRelease(IpAddress ip) {
        boolean success = true;
        Long networkId = ip.getAssociatedWithNetworkId();
        if (networkId != null) {
            if (ip.getSystem()) {
                CallContext ctx = CallContext.current();
                if (!disassociatePublicIpAddress(ip.getId(), ctx.getCallingUserId(), ctx.getCallingAccount())) {
                    s_logger.warn("Unable to release system ip address id=" + ip.getId());
                    success = false;
                } else {
                    s_logger.warn("Successfully released system ip address id=" + ip.getId());
                }
            }
        }
        return success;
    }

    @Override
    @DB
    public void allocateDirectIp(NicProfile nic, DataCenter dc, VirtualMachineProfile vm, Network network, String requestedIpv4, String requestedIpv6)
        throws InsufficientVirtualNetworkCapcityException, InsufficientAddressCapacityException {
        //This method allocates direct ip for the Shared network in Advance zones
        boolean ipv4 = false;

        Transaction txn = Transaction.currentTxn();
        txn.start();

        if (network.getGateway() != null) {
            if (nic.getIp4Address() == null) {
                ipv4 = true;
                PublicIp ip = null;

                //Get ip address from the placeholder and don't allocate a new one
                if (requestedIpv4 != null && vm.getType() == VirtualMachine.Type.DomainRouter) {
                    Nic placeholderNic = _networkModel.getPlaceholderNicForRouter(network, null);
                    if (placeholderNic != null) {
                        IPAddressVO userIp = _ipAddressDao.findByIpAndSourceNetworkId(network.getId(), placeholderNic.getIp4Address());
                        ip = PublicIp.createFromAddrAndVlan(userIp, _vlanDao.findById(userIp.getVlanId()));
                        s_logger.debug("Nic got an ip address " + placeholderNic.getIp4Address() + " stored in placeholder nic for the network " + network);
                    }
                }

                if (ip == null) {
                    ip = assignPublicIpAddress(dc.getId(), null, vm.getOwner(), VlanType.DirectAttached, network.getId(), requestedIpv4, false);
                }

                nic.setIp4Address(ip.getAddress().toString());
                nic.setGateway(ip.getGateway());
                nic.setNetmask(ip.getNetmask());
                nic.setIsolationUri(IsolationType.Vlan.toUri(ip.getVlanTag()));
                //nic.setBroadcastType(BroadcastDomainType.Vlan);
                //nic.setBroadcastUri(BroadcastDomainType.Vlan.toUri(ip.getVlanTag()));
                nic.setBroadcastType(network.getBroadcastDomainType());
                nic.setBroadcastUri(network.getBroadcastUri());
                nic.setFormat(AddressFormat.Ip4);
                nic.setReservationId(String.valueOf(ip.getVlanTag()));
                nic.setMacAddress(ip.getMacAddress());
            }
            nic.setDns1(dc.getDns1());
            nic.setDns2(dc.getDns2());
        }

        //FIXME - get ipv6 address from the placeholder if it's stored there
        if (network.getIp6Gateway() != null) {
            if (nic.getIp6Address() == null) {
                UserIpv6Address ip = _ipv6Mgr.assignDirectIp6Address(dc.getId(), vm.getOwner(), network.getId(), requestedIpv6);
                Vlan vlan = _vlanDao.findById(ip.getVlanId());
                nic.setIp6Address(ip.getAddress().toString());
                nic.setIp6Gateway(vlan.getIp6Gateway());
                nic.setIp6Cidr(vlan.getIp6Cidr());
                if (ipv4) {
                    nic.setFormat(AddressFormat.DualStack);
                } else {
                    nic.setIsolationUri(IsolationType.Vlan.toUri(vlan.getVlanTag()));
                    nic.setBroadcastType(BroadcastDomainType.Vlan);
                    nic.setBroadcastUri(BroadcastDomainType.Vlan.toUri(vlan.getVlanTag()));
                    nic.setFormat(AddressFormat.Ip6);
                    nic.setReservationId(String.valueOf(vlan.getVlanTag()));
                    nic.setMacAddress(ip.getMacAddress());
                }
            }
            nic.setIp6Dns1(dc.getIp6Dns1());
            nic.setIp6Dns2(dc.getIp6Dns2());
        }

        txn.commit();
    }

    @Override
    public int getRuleCountForIp(Long addressId, FirewallRule.Purpose purpose, FirewallRule.State state) {
        List<FirewallRuleVO> rules = _firewallDao.listByIpAndPurposeWithState(addressId, purpose, state);
        if (rules == null) {
            return 0;
        }
        return rules.size();
    }

    @Override
    public String allocatePublicIpForGuestNic(Long networkId, DataCenter dc, Pod pod, Account owner, String requestedIp) throws InsufficientAddressCapacityException {
        PublicIp ip = assignPublicIpAddress(dc.getId(), null, owner, VlanType.DirectAttached, networkId, requestedIp, false);
        if (ip == null) {
            s_logger.debug("There is no free public ip address");
            return null;
        }
        Ip ipAddr = ip.getAddress();
        return ipAddr.addr();
    }

    @Override
    public String allocateGuestIP(Account ipOwner, boolean isSystem, long zoneId, Long networkId, String requestedIp) throws InsufficientAddressCapacityException {
        String ipaddr = null;
        Account caller = CallContext.current().getCallingAccount();
        // check permissions
        Network network = _networksDao.findById(networkId);

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

        ipaddr = acquireGuestIpAddress(network, requestedIp);
        return ipaddr;
    }

    @Override
    public String getConfigComponentName() {
        return IpAddressManager.class.getSimpleName();
    }

    @Override
    public ConfigKey<?>[] getConfigKeys() {
        return new ConfigKey<?>[] {UseSystemPublicIps};
    }
}