ISIS protocol manual merge from 1.6 due to cherry pick merge conflict

Change-Id: I6c3abf6a83ddaeba76293dc7864fcec88e9b4e7e
diff --git a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisLink.java b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisLink.java
new file mode 100644
index 0000000..2df4276
--- /dev/null
+++ b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisLink.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed 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 org.onosproject.isis.controller.impl.topology;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.isis.controller.topology.IsisLink;
+import org.onosproject.isis.controller.topology.IsisLinkTed;
+
+/**
+ * Representation of an ISIS Link.
+ */
+public class DefaultIsisLink implements IsisLink {
+
+    private String remoteSystemId;
+    private String localSystemId;
+    private Ip4Address interfaceIp;
+    private Ip4Address neighborIp;
+    private IsisLinkTed linkTed;
+
+    @Override
+    public String remoteSystemId() {
+        return this.remoteSystemId;
+    }
+
+    @Override
+    public String localSystemId() {
+        return this.localSystemId;
+    }
+
+    @Override
+    public Ip4Address interfaceIp() {
+        return this.interfaceIp;
+    }
+
+    @Override
+    public Ip4Address neighborIp() {
+        return this.neighborIp;
+    }
+
+    @Override
+    public IsisLinkTed linkTed() {
+        return this.linkTed;
+    }
+
+    @Override
+    public void setRemoteSystemId(String remoteSystemId) {
+        this.remoteSystemId = remoteSystemId;
+    }
+
+    @Override
+    public void setLocalSystemId(String localSystemId) {
+        this.localSystemId = localSystemId;
+    }
+
+    @Override
+    public void setInterfaceIp(Ip4Address interfaceIp) {
+        this.interfaceIp = interfaceIp;
+    }
+
+    @Override
+    public void setNeighborIp(Ip4Address neighborIp) {
+        this.neighborIp = neighborIp;
+    }
+
+    @Override
+    public void setLinkTed(IsisLinkTed linkTed) {
+        this.linkTed = linkTed;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("remoteSystemId", remoteSystemId)
+                .add("localSystemId", localSystemId)
+                .add("interfaceIp", interfaceIp)
+                .add("neighborIp", neighborIp)
+                .add("linkTed", linkTed)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        DefaultIsisLink that = (DefaultIsisLink) o;
+        return Objects.equal(remoteSystemId, that.remoteSystemId) &&
+                Objects.equal(localSystemId, that.localSystemId) &&
+                Objects.equal(interfaceIp, that.interfaceIp) &&
+                Objects.equal(neighborIp, that.neighborIp) &&
+                Objects.equal(linkTed, that.linkTed);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(remoteSystemId, localSystemId, interfaceIp, neighborIp, linkTed);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisLinkInformation.java b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisLinkInformation.java
new file mode 100644
index 0000000..574f440
--- /dev/null
+++ b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisLinkInformation.java
@@ -0,0 +1,166 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed 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 org.onosproject.isis.controller.impl.topology;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.isis.controller.topology.LinkInformation;
+
+/**
+ * Representation of an ISIS link information..
+ */
+public class DefaultIsisLinkInformation implements LinkInformation {
+
+    String linkId;
+    String linkSourceId;
+    String linkDestinationId;
+    Ip4Address interfaceIp;
+    Ip4Address neighborIp;
+    boolean alreadyCreated;
+
+    /**
+     * Gets link id.
+     *
+     * @return link id
+     */
+    public String linkId() {
+        return linkId;
+    }
+
+    /**
+     * Sets link id.DefaultIsisDeviceInformation.
+     *
+     * @param linkId link id
+     */
+    public void setLinkId(String linkId) {
+        this.linkId = linkId;
+    }
+
+    /**
+     * Gets is already created or not.
+     *
+     * @return true if already created else false
+     */
+    public boolean isAlreadyCreated() {
+        return alreadyCreated;
+    }
+
+    /**
+     * Sets is already created or not.
+     *
+     * @param alreadyCreated true or false
+     */
+    public void setAlreadyCreated(boolean alreadyCreated) {
+        this.alreadyCreated = alreadyCreated;
+    }
+
+    /**
+     * Gets link destination id.
+     *
+     * @return link destination id
+     */
+    public String linkDestinationId() {
+        return linkDestinationId;
+    }
+
+    /**
+     * Sets link destination id.
+     *
+     * @param linkDestinationId link destination id
+     */
+    public void setLinkDestinationId(String linkDestinationId) {
+        this.linkDestinationId = linkDestinationId;
+    }
+
+    /**
+     * Gets link source id.
+     *
+     * @return link source id
+     */
+    public String linkSourceId() {
+        return linkSourceId;
+    }
+
+    /**
+     * Sets link source id.
+     *
+     * @param linkSourceId link source id
+     */
+    public void setLinkSourceId(String linkSourceId) {
+        this.linkSourceId = linkSourceId;
+    }
+
+    /**
+     * Gets interface IP address.
+     *
+     * @return interface IP address
+     */
+    public Ip4Address interfaceIp() {
+        return interfaceIp;
+    }
+
+    /**
+     * Sets interface IP address.
+     *
+     * @param interfaceIp interface IP address
+     */
+    public void setInterfaceIp(Ip4Address interfaceIp) {
+        this.interfaceIp = interfaceIp;
+    }
+
+    @Override
+    public Ip4Address neighborIp() {
+        return this.neighborIp;
+    }
+
+    @Override
+    public void setNeighborIp(Ip4Address neighborIp) {
+        this.neighborIp = neighborIp;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("linkId", linkId)
+                .add("linkSourceId", linkSourceId)
+                .add("linkDestinationId", linkDestinationId)
+                .add("interfaceIp", interfaceIp)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        DefaultIsisLinkInformation that = (DefaultIsisLinkInformation) o;
+        return Objects.equal(linkId, that.linkId) &&
+                Objects.equal(linkSourceId, that.linkSourceId) &&
+                Objects.equal(linkDestinationId, that.linkDestinationId) &&
+                Objects.equal(interfaceIp, that.interfaceIp);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(linkId, linkSourceId, linkDestinationId,
+                interfaceIp);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisLinkTed.java b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisLinkTed.java
new file mode 100644
index 0000000..6122c9a
--- /dev/null
+++ b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisLinkTed.java
@@ -0,0 +1,145 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * Licensed 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 org.onosproject.isis.controller.impl.topology;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import org.onlab.packet.Ip4Address;
+import org.onlab.util.Bandwidth;
+import org.onosproject.isis.controller.topology.IsisLinkTed;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Representation of an ISIS device information.
+ */
+public class DefaultIsisLinkTed implements IsisLinkTed {
+    private int administrativeGroup;
+    private Ip4Address ipv4InterfaceAddress;
+    private Ip4Address ipv4NeighborAddress;
+    private Bandwidth maximumLinkBandwidth;
+    private Bandwidth maximumReservableLinkBandwidth;
+    private List<Bandwidth> unreservedBandwidth = new ArrayList<>();
+    private long teDefaultMetric;
+
+    @Override
+    public int administrativeGroup() {
+        return administrativeGroup;
+    }
+
+    @Override
+    public void setAdministrativeGroup(int administrativeGroup) {
+        this.administrativeGroup = administrativeGroup;
+    }
+
+    @Override
+    public Ip4Address ipv4InterfaceAddress() {
+        return ipv4InterfaceAddress;
+    }
+
+    @Override
+    public void setIpv4InterfaceAddress(Ip4Address interfaceAddress) {
+        this.ipv4InterfaceAddress = interfaceAddress;
+    }
+
+    @Override
+    public Ip4Address ipv4NeighborAddress() {
+        return ipv4NeighborAddress;
+    }
+
+    @Override
+    public void setIpv4NeighborAddress(Ip4Address neighborAddress) {
+        this.ipv4NeighborAddress = neighborAddress;
+    }
+
+    @Override
+    public Bandwidth maximumLinkBandwidth() {
+        return maximumLinkBandwidth;
+    }
+
+    @Override
+    public void setMaximumLinkBandwidth(Bandwidth bandwidth) {
+        this.maximumLinkBandwidth = bandwidth;
+    }
+
+    @Override
+    public Bandwidth maximumReservableLinkBandwidth() {
+        return maximumReservableLinkBandwidth;
+    }
+
+    @Override
+    public void setMaximumReservableLinkBandwidth(Bandwidth bandwidth) {
+        this.maximumReservableLinkBandwidth = bandwidth;
+    }
+
+    @Override
+    public List<Bandwidth> unreservedBandwidth() {
+        return this.unreservedBandwidth;
+    }
+
+    @Override
+    public void setUnreservedBandwidth(List<Bandwidth> bandwidth) {
+        this.unreservedBandwidth.addAll(bandwidth);
+    }
+
+    @Override
+    public long teDefaultMetric() {
+        return teDefaultMetric;
+    }
+
+    @Override
+    public void setTeDefaultMetric(long teMetric) {
+        this.teDefaultMetric = teMetric;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("administrativeGroup", administrativeGroup)
+                .add("ipv4InterfaceAddress", ipv4InterfaceAddress)
+                .add("ipv4NeighborAddress", ipv4NeighborAddress)
+                .add("maximumLinkBandwidth", maximumLinkBandwidth)
+                .add("maximumReservableLinkBandwidth", maximumReservableLinkBandwidth)
+                .add("teDefaultMetric", teDefaultMetric)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        DefaultIsisLinkTed that = (DefaultIsisLinkTed) o;
+        return Objects.equal(administrativeGroup, that.administrativeGroup) &&
+                Objects.equal(ipv4InterfaceAddress, that.ipv4InterfaceAddress) &&
+                Objects.equal(ipv4NeighborAddress, that.ipv4NeighborAddress) &&
+                Objects.equal(maximumLinkBandwidth, that.maximumLinkBandwidth) &&
+                Objects.equal(maximumReservableLinkBandwidth,
+                              that.maximumReservableLinkBandwidth) &&
+                Objects.equal(teDefaultMetric, that.teDefaultMetric);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(administrativeGroup, ipv4InterfaceAddress,
+                                ipv4NeighborAddress, maximumLinkBandwidth, teDefaultMetric);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisRouter.java b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisRouter.java
new file mode 100644
index 0000000..216ce37
--- /dev/null
+++ b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/DefaultIsisRouter.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed 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 org.onosproject.isis.controller.impl.topology;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.isis.controller.topology.IsisRouter;
+
+/**
+ * Representation of an ISIS Router.
+ */
+public class DefaultIsisRouter implements IsisRouter {
+
+    private String systemId;
+    private Ip4Address neighborRouterId;
+    private Ip4Address interfaceId;
+    private boolean isDis;
+
+    /**
+     * Gets the system ID.
+     *
+     * @return systemId system ID
+     */
+    public String systemId() {
+        return systemId;
+    }
+
+    /**
+     * Sets IP address of the Router.
+     */
+    public void setSystemId(String systemId) {
+        this.systemId = systemId;
+    }
+
+    /**
+     * Gets IP address of the interface.
+     *
+     * @return IP address of the interface
+     */
+    public Ip4Address interfaceId() {
+        return interfaceId;
+    }
+
+    /**
+     * Gets IP address of the interface.
+     *
+     * @param interfaceId IP address of the interface
+     */
+    public void setInterfaceId(Ip4Address interfaceId) {
+        this.interfaceId = interfaceId;
+    }
+
+    /**
+     * Gets neighbor's Router id.
+     *
+     * @return neighbor's Router id
+     */
+    public Ip4Address neighborRouterId() {
+        return neighborRouterId;
+    }
+
+    /**
+     * Sets neighbor's Router id.
+     *
+     * @param advertisingRouterId neighbor's Router id
+     */
+    public void setNeighborRouterId(Ip4Address advertisingRouterId) {
+        this.neighborRouterId = advertisingRouterId;
+    }
+
+    /**
+     * Gets if DR or not.
+     *
+     * @return true if DR else false
+     */
+    public boolean isDis() {
+        return isDis;
+    }
+
+    /**
+     * Sets dis or not.
+     *
+     * @param dis true if DIS else false
+     */
+    public void setDis(boolean dis) {
+        isDis = dis;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("systemId", systemId)
+                .add("neighborRouterId", neighborRouterId)
+                .add("interfaceId", interfaceId)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        DefaultIsisRouter that = (DefaultIsisRouter) o;
+        return Objects.equal(systemId, that.systemId) &&
+                Objects.equal(neighborRouterId, that.neighborRouterId) &&
+                Objects.equal(interfaceId, that.interfaceId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(systemId, neighborRouterId, interfaceId);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/TopologyForDeviceAndLinkImpl.java b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/TopologyForDeviceAndLinkImpl.java
new file mode 100644
index 0000000..8682a4a
--- /dev/null
+++ b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/TopologyForDeviceAndLinkImpl.java
@@ -0,0 +1,490 @@
+/*
+* Copyright 2016 Open Networking Laboratory
+*
+* Licensed 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 org.onosproject.isis.controller.impl.topology;
+
+import org.onlab.util.Bandwidth;
+import org.onosproject.isis.controller.topology.DeviceInformation;
+import org.onosproject.isis.controller.topology.IsisRouter;
+import org.onosproject.isis.controller.topology.LinkInformation;
+import org.onosproject.isis.controller.topology.TopologyForDeviceAndLink;
+import org.onosproject.isis.controller.topology.IsisLinkTed;
+import org.onosproject.isis.io.isispacket.pdu.LsPdu;
+import org.onosproject.isis.io.isispacket.tlv.IsExtendedReachability;
+import org.onosproject.isis.io.isispacket.tlv.IsisTlv;
+import org.onosproject.isis.io.isispacket.tlv.NeighborForExtendedIs;
+
+import org.onosproject.isis.io.isispacket.tlv.subtlv.TrafficEngineeringSubTlv;
+import org.onosproject.isis.io.isispacket.tlv.subtlv.InterfaceIpAddress;
+import org.onosproject.isis.io.isispacket.tlv.subtlv.NeighborIpAddress;
+import org.onosproject.isis.io.isispacket.tlv.subtlv.AdministrativeGroup;
+import org.onosproject.isis.io.isispacket.tlv.subtlv.TrafficEngineeringMetric;
+import org.onosproject.isis.io.isispacket.tlv.subtlv.UnreservedBandwidth;
+import org.onosproject.isis.io.isispacket.tlv.subtlv.MaximumReservableBandwidth;
+import org.onosproject.isis.io.isispacket.tlv.subtlv.MaximumBandwidth;
+import org.onosproject.isis.io.util.IsisConstants;
+import org.onosproject.isis.io.util.IsisUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Represents device and link topology information.
+ */
+public class TopologyForDeviceAndLinkImpl implements TopologyForDeviceAndLink {
+
+    private static final Logger log = LoggerFactory.getLogger(TopologyForDeviceAndLinkImpl.class);
+    private Map<String, DeviceInformation> deviceInformationMap = new LinkedHashMap<>();
+    private Map<String, IsisRouter> isisRouterDetails = new LinkedHashMap<>();
+    private Map<String, DeviceInformation> deviceInformationMapForPointToPoint = new LinkedHashMap<>();
+    private Map<String, DeviceInformation> deviceInformationMapToDelete = new LinkedHashMap<>();
+    private Map<String, LinkInformation> addedLinkInformationMap = new LinkedHashMap<>();
+
+    /**
+     * Gets device information.
+     *
+     * @return device information
+     */
+    public Map<String, DeviceInformation> deviceInformationMap() {
+        return deviceInformationMap;
+    }
+
+    /**
+     * Gets ISIS router list information.
+     *
+     * @return router information
+     */
+    public Map<String, IsisRouter> isisDeviceList() {
+        return isisRouterDetails;
+    }
+
+    /**
+     * Sets device information.
+     *
+     * @param key                  key used to add in map
+     * @param deviceInformationMap device information instance
+     */
+    public void setDeviceInformationMap(String key, DeviceInformation deviceInformationMap) {
+        if (deviceInformationMap != null) {
+            this.deviceInformationMap.put(key, deviceInformationMap);
+        }
+
+    }
+
+    /**
+     * Gets deviceInformation as map for Point-To-Point.
+     *
+     * @return deviceInformationMap
+     */
+    public Map<String, DeviceInformation> deviceInformationMapForPointToPoint() {
+        return deviceInformationMapForPointToPoint;
+    }
+
+    /**
+     * Sets deviceInformation as map for Point-To-Point..
+     *
+     * @param key                  key used to add in map
+     * @param deviceInformationMap device information instance
+     */
+    public void setDeviceInformationMapForPointToPoint(String key, DeviceInformation deviceInformationMap) {
+        if (deviceInformationMap != null) {
+            this.deviceInformationMapForPointToPoint.put(key, deviceInformationMap);
+        }
+
+    }
+
+    /**
+     * Gets deviceInformation as map.
+     *
+     * @return deviceInformationMap to delete from core
+     */
+    public Map<String, DeviceInformation> deviceInformationMapToDelete() {
+        return deviceInformationMapToDelete;
+    }
+
+    /**
+     * Sets device information for removal.
+     *
+     * @param key                          ket used to add in map
+     * @param deviceInformationMapToDelete map from device information to remove
+     */
+    public void setDeviceInformationMapToDelete(String key, DeviceInformation deviceInformationMapToDelete) {
+        if (deviceInformationMapToDelete != null) {
+            this.deviceInformationMapToDelete.put(key, deviceInformationMapToDelete);
+        }
+    }
+
+    /**
+     * Removes Device Information.
+     *
+     * @param key ket used to remove from map
+     */
+    public void removeDeviceInformationMapFromDeleteMap(String key) {
+        removeDeviceInformationMap(key);
+        if (this.deviceInformationMapToDelete.containsKey(key)) {
+            this.deviceInformationMapToDelete.remove(key);
+        }
+    }
+
+    /**
+     * Gets Device Information.
+     *
+     * @param key system id as key to store in map
+     * @return Device Information
+     */
+    public DeviceInformation deviceInformation(String key) {
+        DeviceInformation deviceInformation = this.deviceInformationMap.get(key);
+        return deviceInformation;
+    }
+
+    /**
+     * Removes Device Information from map.
+     *
+     * @param key key used to remove from map
+     */
+    public void removeDeviceInformationMap(String key) {
+        if (this.deviceInformationMap.containsKey(key)) {
+            this.deviceInformationMap.remove(key);
+        }
+    }
+
+    @Override
+    public void removeLinks(String linkId) {
+        this.addedLinkInformationMap.remove(linkId);
+    }
+
+    /**
+     * Gets link information as map.
+     *
+     * @return link information as map
+     */
+    public Map<String, LinkInformation> linkInformationMap() {
+        return addedLinkInformationMap;
+    }
+
+    private LinkInformation getLinkInformation(String key) {
+        LinkInformation linkInformation = this.addedLinkInformationMap.get(key);
+        return linkInformation;
+    }
+
+    /**
+     * Sets link information in map.
+     *
+     * @param key                key used to add in map
+     * @param linkInformationMap link information instance
+     */
+    public void setLinkInformationMap(String key, LinkInformation linkInformationMap) {
+        if (!this.addedLinkInformationMap.containsKey(key)) {
+            this.addedLinkInformationMap.put(key, linkInformationMap);
+        }
+    }
+
+    /**
+     * Gets linkInformation as map for PointToPoint.
+     *
+     * @return linkInformationMap
+     */
+    public Map<String, LinkInformation> linkInformationMapForPointToPoint() {
+        return addedLinkInformationMap;
+    }
+
+    /**
+     * Sets linkInformation as map for PointToPoint.
+     *
+     * @param key                key used to add in map
+     * @param linkInformationMap link information instance
+     */
+    public void setLinkInformationMapForPointToPoint(String key, LinkInformation linkInformationMap) {
+        if (!this.addedLinkInformationMap.containsKey(key)) {
+            this.addedLinkInformationMap.put(key, linkInformationMap);
+        }
+    }
+
+    /**
+     * Removes Link Information from linkInformationMap.
+     *
+     * @param key key used to remove in map
+     */
+    public void removeLinkInformationMap(String key) {
+        if (this.addedLinkInformationMap.containsKey(key)) {
+            this.addedLinkInformationMap.remove(key);
+        }
+    }
+
+    /**
+     * Returns the ISIS router instance.
+     *
+     * @param systemId system ID to get router details
+     * @return ISIS router instance
+     */
+    public IsisRouter isisRouter(String systemId) {
+        String routerId = IsisUtil.removeTailingZeros(systemId);
+        IsisRouter isisRouter = isisRouterDetails.get(routerId);
+        if (isisRouter != null) {
+            return isisRouter;
+        } else {
+            log.debug("IsisRouter is not available");
+            IsisRouter isisRouterCheck = new DefaultIsisRouter();
+            isisRouterCheck.setSystemId(routerId);
+            return isisRouterCheck;
+        }
+    }
+
+    /**
+     * Removes the ISIS router instance from map.
+     *
+     * @param systemId system ID to remove router details
+     */
+    public void removeRouter(String systemId) {
+        String routerId = IsisUtil.removeTailingZeros(systemId);
+        isisRouterDetails.remove(systemId);
+    }
+
+    /**
+     * Creates Device instance.
+     *
+     * @param lsPdu ISIS LSPDU instance
+     * @return isisRouter isisRouter instance
+     */
+    public IsisRouter createDeviceInfo(LsPdu lsPdu) {
+        IsisRouter isisRouter = createIsisRouter(lsPdu);
+
+        if (isisRouter.systemId() != null) {
+            if (isisRouter.interfaceId() == null && isisRouter.neighborRouterId() == null) {
+                isisRouter.setInterfaceId(IsisConstants.DEFAULTIP);
+                isisRouter.setNeighborRouterId(IsisConstants.DEFAULTIP);
+                isisRouterDetails.put(isisRouter.systemId(), isisRouter);
+            }
+        }
+        return isisRouter;
+    }/*
+
+    *//**
+     * Removes Device and Link instance.
+     *
+     * @param lsPdu ISIS LSPDU instance
+     * @return isisRouter isisRouter instance
+     *//*
+    public IsisRouter removeDeviceAndLinkInfo(LsPdu lsPdu) {
+        IsisRouter isisRouter = createIsisRouter(lsPdu);
+        return isisRouter;
+    }*/
+
+    /**
+     * Creates link information.
+     *
+     * @param lsPdu       ls pdu instance
+     * @param ownSystemId system ID
+     * @return link information
+     */
+    public Map<String, LinkInformation> createLinkInfo(LsPdu lsPdu, String ownSystemId) {
+        for (IsisTlv isisTlv : lsPdu.tlvs()) {
+            if (isisTlv instanceof IsExtendedReachability) {
+                IsExtendedReachability isExtendedReachability = (IsExtendedReachability) isisTlv;
+                List<NeighborForExtendedIs> neighborForExtendedIsList = isExtendedReachability.neighbours();
+                for (NeighborForExtendedIs neighbor : neighborForExtendedIsList) {
+                    String neighbourId = neighbor.neighborId();
+                    String routerId = IsisUtil.removeTailingZeros(lsPdu.lspId());
+                    if (!(neighbourId.equals(ownSystemId))) {
+                        IsisRouter isisRouter = isisRouterDetails.get(neighbourId);
+                        if (isisRouter != null) {
+                            String linkId = "link:" + routerId + "-" + neighbourId;
+                            addedLinkInformationMap.put(linkId, createLinkInformation(lsPdu, linkId,
+                                    routerId, neighbourId));
+                        } else {
+                            createIsisRouterDummy(neighbourId);
+                            String linkId = "link:" + routerId + "-" + neighbourId;
+                            LinkInformation linkInformation = createLinkInformation(lsPdu, linkId,
+                                    routerId, neighbourId);
+                            linkInformation.setAlreadyCreated(true);
+                            addedLinkInformationMap.put(linkId, linkInformation);
+                        }
+                    }
+
+                }
+            }
+        }
+        return addedLinkInformationMap;
+    }
+
+    /**
+     * Removes link information.
+     *
+     * @param systemId system ID to remove link information
+     * @return updated link information
+     */
+    public Map<String, LinkInformation> removeLinkInfo(String systemId) {
+        String routerId = IsisUtil.removeTailingZeros(systemId);
+        Map<String, LinkInformation> removeLinkInformationMap = new LinkedHashMap<>();
+        for (String key : addedLinkInformationMap.keySet()) {
+            if (key.contains(routerId)) {
+                removeLinkInformationMap.put(key, addedLinkInformationMap.get(key));
+            }
+        }
+        return removeLinkInformationMap;
+    }
+
+    /**
+     * Creates link information.
+     *
+     * @param lsPdu       link state pdu
+     * @param linkId      link id
+     * @param localRouter local router system id
+     * @param neighborId  destination router system id
+     * @return linkInformation instance
+     */
+    private LinkInformation createLinkInformation(LsPdu lsPdu, String linkId, String localRouter, String neighborId) {
+        LinkInformation linkInformation = new DefaultIsisLinkInformation();
+        IsisRouter isisRouter = isisRouterDetails.get(neighborId);
+        for (IsisTlv isisTlv : lsPdu.tlvs()) {
+            if (isisTlv instanceof IsExtendedReachability) {
+                IsExtendedReachability isExtendedReachability = (IsExtendedReachability) isisTlv;
+                List<NeighborForExtendedIs> neighbours = isExtendedReachability.neighbours();
+                for (NeighborForExtendedIs teTlv : neighbours) {
+                    List<TrafficEngineeringSubTlv> teSubTlvs = teTlv.teSubTlv();
+                    for (TrafficEngineeringSubTlv teSubTlv : teSubTlvs) {
+                        if (teSubTlv instanceof InterfaceIpAddress) {
+                            InterfaceIpAddress localIpAddress = (InterfaceIpAddress) teSubTlv;
+                            linkInformation.setInterfaceIp(localIpAddress.localInterfaceIPAddress());
+                        } else if (teSubTlv instanceof NeighborIpAddress) {
+                            NeighborIpAddress neighborIpAddress = (NeighborIpAddress) teSubTlv;
+                            linkInformation.setNeighborIp(neighborIpAddress.neighborIPAddress());
+                        }
+
+                    }
+                }
+            }
+        }
+        linkInformation.setLinkId(linkId);
+        linkInformation.setAlreadyCreated(false);
+        linkInformation.setLinkDestinationId(neighborId);
+        linkInformation.setLinkSourceId(localRouter);
+        return linkInformation;
+    }
+
+    /**
+     * Creates ISIS router instance.
+     *
+     * @param lsPdu lsp instance
+     * @return isisRouter instance
+     */
+    private IsisRouter createIsisRouter(LsPdu lsPdu) {
+        IsisRouter isisRouter = new DefaultIsisRouter();
+        if (IsisUtil.checkIsDis(lsPdu.lspId())) {
+            isisRouter.setDis(true);
+        } else {
+            isisRouter.setDis(false);
+        }
+        isisRouter.setSystemId(IsisUtil.removeTailingZeros(lsPdu.lspId()));
+        for (IsisTlv isisTlv : lsPdu.tlvs()) {
+            if (isisTlv instanceof IsExtendedReachability) {
+                IsExtendedReachability isExtendedReachability = (IsExtendedReachability) isisTlv;
+                List<NeighborForExtendedIs> neighbours = isExtendedReachability.neighbours();
+                for (NeighborForExtendedIs teTlv : neighbours) {
+                    List<TrafficEngineeringSubTlv> teSubTlvs = teTlv.teSubTlv();
+                    for (TrafficEngineeringSubTlv teSubTlv : teSubTlvs) {
+                        if (teSubTlv instanceof InterfaceIpAddress) {
+                            InterfaceIpAddress localIpAddress = (InterfaceIpAddress) teSubTlv;
+                            isisRouter.setInterfaceId(localIpAddress.localInterfaceIPAddress());
+                        } else if (teSubTlv instanceof NeighborIpAddress) {
+                            NeighborIpAddress neighborIpAddress = (NeighborIpAddress) teSubTlv;
+                            isisRouter.setNeighborRouterId(neighborIpAddress.neighborIPAddress());
+                        }
+
+                    }
+                }
+            }
+        }
+        return isisRouter;
+    }
+
+    /**
+     * Creates ISIS router instance.
+     *
+     * @param systemId system ID
+     * @return isisRouter instance
+     */
+    private IsisRouter createIsisRouterDummy(String systemId) {
+        IsisRouter isisRouter = new DefaultIsisRouter();
+        isisRouter.setSystemId(systemId);
+        isisRouter.setDis(false);
+        isisRouter.setInterfaceId(IsisConstants.DEFAULTIP);
+        isisRouter.setNeighborRouterId(IsisConstants.DEFAULTIP);
+
+        return isisRouter;
+    }
+
+    /**
+     * Creates the ISIS link TED information.
+     *
+     * @param lsPdu link state PDU
+     * @return isisLinkTed
+     */
+    public IsisLinkTed createIsisLinkTedInfo(LsPdu lsPdu) {
+        IsisLinkTed isisLinkTed = new DefaultIsisLinkTed();
+        for (IsisTlv isisTlv : lsPdu.tlvs()) {
+            if (isisTlv instanceof IsExtendedReachability) {
+                IsExtendedReachability isExtendedReachability = (IsExtendedReachability) isisTlv;
+                List<NeighborForExtendedIs> neighbours = isExtendedReachability.neighbours();
+                for (NeighborForExtendedIs teTlv : neighbours) {
+                    List<TrafficEngineeringSubTlv> teSubTlvs = teTlv.teSubTlv();
+                    for (TrafficEngineeringSubTlv teSubTlv : teSubTlvs) {
+                        if (teSubTlv instanceof AdministrativeGroup) {
+                            AdministrativeGroup ag = (AdministrativeGroup) teSubTlv;
+                            isisLinkTed.setAdministrativeGroup(ag.administrativeGroup());
+                        }
+                        if (teSubTlv instanceof InterfaceIpAddress) {
+                            InterfaceIpAddress localIpAddress = (InterfaceIpAddress) teSubTlv;
+                            isisLinkTed.setIpv4InterfaceAddress(localIpAddress.localInterfaceIPAddress());
+                        }
+                        if (teSubTlv instanceof NeighborIpAddress) {
+                            NeighborIpAddress neighborIpAddress = (NeighborIpAddress) teSubTlv;
+                            isisLinkTed.setIpv4NeighborAddress(neighborIpAddress.neighborIPAddress());
+                        }
+                        if (teSubTlv instanceof TrafficEngineeringMetric) {
+                            TrafficEngineeringMetric teM = (TrafficEngineeringMetric) teSubTlv;
+                            isisLinkTed.setTeDefaultMetric(teM.getTrafficEngineeringMetricValue());
+                        }
+                        if (teSubTlv instanceof MaximumBandwidth) {
+                            MaximumBandwidth maxLinkBandwidth = (MaximumBandwidth) teSubTlv;
+                            isisLinkTed.setMaximumLinkBandwidth(
+                                    Bandwidth.bps(maxLinkBandwidth.getMaximumBandwidthValue()));
+                        }
+                        if (teSubTlv instanceof MaximumReservableBandwidth) {
+                            MaximumReservableBandwidth maxReservableBw = (MaximumReservableBandwidth) teSubTlv;
+                            isisLinkTed.setMaximumReservableLinkBandwidth(
+                                    Bandwidth.bps(maxReservableBw.getMaximumBandwidthValue()));
+                        }
+                        if (teSubTlv instanceof UnreservedBandwidth) {
+                            UnreservedBandwidth unReservedBandwidth = (UnreservedBandwidth) teSubTlv;
+                            List<Bandwidth> bandwidthList = new ArrayList<>();
+                            List<Float> unReservedBandwidthList = unReservedBandwidth.unReservedBandwidthValue();
+                            for (Float unReservedBandwidthFloatValue : unReservedBandwidthList) {
+                                Bandwidth bandwidth = Bandwidth.bps(unReservedBandwidthFloatValue);
+                                bandwidthList.add(bandwidth);
+                            }
+                            isisLinkTed.setUnreservedBandwidth(bandwidthList);
+                        }
+                    }
+                }
+            }
+        }
+        return isisLinkTed;
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/package-info.java b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/package-info.java
new file mode 100644
index 0000000..f9b4c0c
--- /dev/null
+++ b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed 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.
+ */
+
+/**
+ * Implementation of the ISIS controller topology.
+ */
+package org.onosproject.isis.controller.impl.topology;
\ No newline at end of file