[ONOS-2363]Implementation of Open and Error messages.

Change-Id: Id4aa762caf1847a6b5e56517cb159608fd54eefb
diff --git a/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/OSPFareaIDsubTlv.java b/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/OSPFareaIDsubTlv.java
new file mode 100644
index 0000000..fc2f723
--- /dev/null
+++ b/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/OSPFareaIDsubTlv.java
@@ -0,0 +1,132 @@
+/*

+ * Copyright 2014 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.pcepio.types;

+

+import java.util.Objects;

+import org.jboss.netty.buffer.ChannelBuffer;

+import org.onosproject.pcepio.protocol.PcepVersion;

+import org.slf4j.Logger;

+import org.slf4j.LoggerFactory;

+

+import com.google.common.base.MoreObjects;

+

+/**

+ * Provides area ID for OSPF area.

+ */

+public class OSPFareaIDsubTlv implements PcepValueType {

+

+    /* Reference :draft-ietf-idr-ls-distribution-10.

+     *  0                   1                   2                   3

+      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+     |           Type=[TBD12]         |             Length=4         |

+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+     |                    opaque value (32 Bit AS Number)            |

+     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+     */

+

+    protected static final Logger log = LoggerFactory.getLogger(OSPFareaIDsubTlv.class);

+

+    public static final short TYPE = 600; //TODD:change this TBD12

+    public static final short LENGTH = 4;

+

+    private final int rawValue;

+

+    /**

+     * constructor to initialize rawValue.

+     *

+     * @param rawValue area ID for OSPF area.

+     */

+    public OSPFareaIDsubTlv(int rawValue) {

+        this.rawValue = rawValue;

+    }

+

+    /**

+     * Returns newly created OSPFareaIDsubTlv object.

+     *

+     * @param raw opaque value of AreaID

+     * @return new object of OSPF area ID sub TLV

+     */

+    public static OSPFareaIDsubTlv of(final int raw) {

+        return new OSPFareaIDsubTlv(raw);

+    }

+

+    /**

+     * Returns RawValue opaque value of AreaID.

+     *

+     * @return rawValue Area ID

+     */

+    public int getInt() {

+        return rawValue;

+    }

+

+    @Override

+    public PcepVersion getVersion() {

+        return PcepVersion.PCEP_1;

+    }

+

+    @Override

+    public short getType() {

+        return TYPE;

+    }

+

+    @Override

+    public short getLength() {

+        return LENGTH;

+    }

+

+    @Override

+    public int hashCode() {

+        return Objects.hash(rawValue);

+    }

+

+    @Override

+    public boolean equals(Object obj) {

+        if (this == obj) {

+            return true;

+        }

+        if (obj instanceof OSPFareaIDsubTlv) {

+            OSPFareaIDsubTlv other = (OSPFareaIDsubTlv) obj;

+            return Objects.equals(this.rawValue, other.rawValue);

+        }

+        return false;

+    }

+

+    @Override

+    public int write(ChannelBuffer c) {

+        int iLenStartIndex = c.writerIndex();

+        c.writeShort(TYPE);

+        c.writeShort(LENGTH);

+        c.writeInt(rawValue);

+        return c.writerIndex() - iLenStartIndex;

+    }

+

+    /**

+     * Reads the channel buffer and returns object of OSPFAreaIdSubTlv.

+     *

+     * @param c input channel buffer

+     * @return object of OSPFAreaIdSubTlv

+     */

+    public static OSPFareaIDsubTlv read(ChannelBuffer c) {

+        return OSPFareaIDsubTlv.of(c.readInt());

+    }

+

+    @Override

+    public String toString() {

+        return MoreObjects.toStringHelper(getClass()).add("Type", TYPE).add("Length", LENGTH).add("Value", rawValue)

+                .toString();

+    }

+}