[onos-2242]OVSDB-based implementation of tunnel config behaviour.

Change-Id: I854a9e572acbfa698ec40309945d93810fb2b471

+/*
+ * 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.net.behaviour;
+
+import java.util.Objects;
+
+import com.google.common.annotations.Beta;
+import org.onlab.packet.IpAddress;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Represent for a tunnel point using ip address.
+ */
+@Beta
+public final class IpTunnelEndPoint implements TunnelEndPoint {
+
+    private final IpAddress ip;
+
+    /**
+     * Public construction is prohibited.
+     * @param ip ip address
+     */
+    private IpTunnelEndPoint(IpAddress ip) {
+        this.ip = ip;
+    }
+
+    /**
+     * Create a IP tunnel end point.
+     * @param ip IP address
+     * @return IpTunnelEndPoint
+     */
+    public static IpTunnelEndPoint ipTunnelPoint(IpAddress ip) {
+        return new IpTunnelEndPoint(ip);
+    }
+
+    /**
+     * Returns IP address.
+     * @return IP address
+     */
+    public IpAddress ip() {
+        return ip;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(ip);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof IpTunnelEndPoint) {
+            final IpTunnelEndPoint other = (IpTunnelEndPoint) obj;
+            return Objects.equals(this.ip, other.ip);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass()).add("ip", ip).toString();
+    }
+}

+/*
+ * 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.driver.ovsdb;
+
+import java.util.Collection;
+
+import java.util.Set;
+
+import org.onlab.packet.IpAddress;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.behaviour.DefaultTunnelDescription;
+import org.onosproject.net.behaviour.IpTunnelEndPoint;
+import org.onosproject.net.behaviour.TunnelConfig;
+import org.onosproject.net.behaviour.TunnelDescription;
+import org.onosproject.net.behaviour.TunnelEndPoint;
+import org.onosproject.net.behaviour.TunnelName;
+import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.onosproject.net.driver.DriverHandler;
+import org.onosproject.ovsdb.controller.OvsdbClientService;
+import org.onosproject.ovsdb.controller.OvsdbController;
+import org.onosproject.ovsdb.controller.OvsdbNodeId;
+import org.onosproject.ovsdb.controller.OvsdbTunnel;
+
+import com.google.common.collect.Sets;
+
+/**
+ * OVSDB-based implementation of tunnel config behaviour.
+ */
+public class OvsdbTunnelConfig extends AbstractHandlerBehaviour
+        implements TunnelConfig {
+
+    private static final String DEFAULT_ADDRESS = "0:0:0:0";
+
+    @Override
+    public void createTunnel(TunnelDescription tunnel) {
+        DriverHandler handler = handler();
+        OvsdbClientService ovsdbNode = getOvsdbNode(handler);
+        IpTunnelEndPoint ipSrc = IpTunnelEndPoint.ipTunnelPoint(IpAddress
+                .valueOf(DEFAULT_ADDRESS));
+        IpTunnelEndPoint ipDst = IpTunnelEndPoint.ipTunnelPoint(IpAddress
+                .valueOf(DEFAULT_ADDRESS));
+        if (tunnel.src() instanceof IpTunnelEndPoint) {
+            ipSrc = (IpTunnelEndPoint) tunnel.src();
+        }
+        if (tunnel.dst() instanceof IpTunnelEndPoint) {
+            ipDst = (IpTunnelEndPoint) tunnel.dst();
+        }
+        //Even if source point ip or destination point ip equals 0:0:0:0, it is still work-in-progress.
+        ovsdbNode.createTunnel(ipSrc.ip(), ipDst.ip());
+    }
+
+    @Override
+    public void removeTunnel(TunnelDescription tunnel) {
+        DriverHandler handler = handler();
+        OvsdbClientService ovsdbNode = getOvsdbNode(handler);
+        IpTunnelEndPoint ipSrc = IpTunnelEndPoint.ipTunnelPoint(IpAddress
+                .valueOf(DEFAULT_ADDRESS));
+        IpTunnelEndPoint ipDst = IpTunnelEndPoint.ipTunnelPoint(IpAddress
+                .valueOf(DEFAULT_ADDRESS));
+        if (tunnel.src() instanceof IpTunnelEndPoint) {
+            ipSrc = (IpTunnelEndPoint) tunnel.src();
+        }
+        if (tunnel.dst() instanceof IpTunnelEndPoint) {
+            ipDst = (IpTunnelEndPoint) tunnel.dst();
+        }
+      //Even if source point ip or destination point ip equals 0:0:0:0, it is still work-in-progress.
+        ovsdbNode.dropTunnel(ipSrc.ip(), ipDst.ip());
+    }
+
+    @Override
+    public void updateTunnel(TunnelDescription tunnel) {
+        // TODO Auto-generated method stub
+
+    }
+
+    @Override
+    public Collection<TunnelDescription> getTunnels() {
+        DriverHandler handler = handler();
+        OvsdbClientService ovsdbNode = getOvsdbNode(handler);
+        Set<OvsdbTunnel> ovsdbSet = ovsdbNode.getTunnels();
+        Collection<TunnelDescription> tunnels = Sets.newHashSet();
+        ovsdbSet.forEach(o -> {
+            TunnelEndPoint ipSrc = IpTunnelEndPoint.ipTunnelPoint(o.localIp());
+            TunnelEndPoint ipDst = IpTunnelEndPoint.ipTunnelPoint(o.remoteIp());
+            TunnelName name = TunnelName.tunnelName(o.tunnelName().toString());
+            TunnelDescription des = new DefaultTunnelDescription(
+                                                                 ipSrc,
+                                                                 ipDst,
+                                                                 TunnelDescription.Type.VXLAN,
+                                                                 name);
+            tunnels.add(des);
+        });
+        return tunnels;
+    }
+
+    // OvsdbNodeId(IP:port) is used in the adaptor while DeviceId(ovsdb:IP:port)
+    // is used in the core. So DeviceId need be changed to OvsdbNodeId.
+    private OvsdbNodeId changeDeviceIdToNodeId(DeviceId deviceId) {
+        int lastColon = deviceId.toString().lastIndexOf(":");
+        int fistColon = deviceId.toString().indexOf(":");
+        String ip = deviceId.toString().substring(fistColon + 1, lastColon - 1);
+        String port = deviceId.toString().substring(lastColon + 1);
+        IpAddress ipAddress = IpAddress.valueOf(ip);
+        long portL = Long.valueOf(port).longValue();
+        return new OvsdbNodeId(ipAddress, portL);
+    }
+
+    private OvsdbClientService getOvsdbNode(DriverHandler handler) {
+        OvsdbController ovsController = handler.get(OvsdbController.class);
+        DeviceId deviceId = handler.data().deviceId();
+        OvsdbNodeId nodeId = changeDeviceIdToNodeId(deviceId);
+        return ovsController.getOvsdbClient(nodeId);
+    }
+}