[ONOS-2344]Implementation of PCEP report messages.

Change-Id: I9258a34ad7b09a583dcd0e56f90a36958c3acb34

+/*
+ * 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.protocol.ver1;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.pcepio.exceptions.PcepParseException;
+import org.onosproject.pcepio.protocol.PcepInterLayerObject;
+import org.onosproject.pcepio.types.PcepObjectHeader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.MoreObjects;
+
+/*
+ *      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
+    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+    |    Reserved                                               |N|I|
+    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+public class PcepInterLayerObjectVer1 implements PcepInterLayerObject {
+
+    protected static final Logger log = LoggerFactory.getLogger(PcepInterLayerObjectVer1.class);
+
+    public static final byte INTER_LAYER_OBJ_TYPE = 1;
+    public static final byte INTER_LAYER_OBJ_CLASS = 18;
+    public static final byte INTER_LAYER_OBJECT_VERSION = 1;
+    public static final short INTER_LAYER_OBJ_MINIMUM_LENGTH = 8;
+    public static final boolean DEFAULT_IFLAG = false;
+    public static final boolean DEFAULT_NFLAG = false;
+    public static final int OBJECT_HEADER_LENGTH = 4;
+    public static final int NFLAG_SHIFT_VALUE = 0x02;
+    public static final int IFLAG_SHIFT_VALUE = 0x01;
+    public static final int FLAGS_SET_VALUE = 1;
+
+    static final PcepObjectHeader DEFAULT_INTER_LAYER_OBJECT_HEADER = new PcepObjectHeader(INTER_LAYER_OBJ_CLASS,
+            INTER_LAYER_OBJ_TYPE, PcepObjectHeader.REQ_OBJ_OPTIONAL_PROCESS, PcepObjectHeader.RSP_OBJ_PROCESSED,
+            INTER_LAYER_OBJ_MINIMUM_LENGTH);
+
+    private PcepObjectHeader interLayerObjHeader;
+    private boolean bNFlag;
+    private boolean bIFlag;
+
+    /**
+     * Constructor to initialize all parameters for Pcep Inter Layer Object.
+     *
+     * @param interLayerObjHeader inter layer object header
+     * @param bNFlag N flag
+     * @param bIFlag I flag
+     */
+    public PcepInterLayerObjectVer1(PcepObjectHeader interLayerObjHeader, boolean bNFlag, boolean bIFlag) {
+
+        this.interLayerObjHeader = interLayerObjHeader;
+        this.bNFlag = bNFlag;
+        this.bIFlag = bIFlag;
+    }
+
+    /**
+     * Sets Object Header.
+     *
+     * @param obj object header
+     */
+    public void setInterLayerObjHeader(PcepObjectHeader obj) {
+        this.interLayerObjHeader = obj;
+    }
+
+    @Override
+    public void setbNFlag(boolean bNFlag) {
+        this.bNFlag = bNFlag;
+    }
+
+    @Override
+    public void setbIFlag(boolean bIFlag) {
+        this.bIFlag = bIFlag;
+    }
+
+    /**
+     * Returns object header.
+     *
+     * @return inter Layer Object Header
+     */
+    public PcepObjectHeader getInterLayerObjHeader() {
+        return this.interLayerObjHeader;
+    }
+
+    @Override
+    public boolean getbNFlag() {
+        return this.bNFlag;
+    }
+
+    @Override
+    public boolean getbIFlag() {
+        return this.bIFlag;
+    }
+
+    /**
+     * Reads channel buffer and returns object of PcepInterLayerObject.
+     *
+     * @param cb of type channel buffer
+     * @return object of PcepInterLayerObject
+     * @throws PcepParseException when fails to read from channel buffer
+     */
+    public static PcepInterLayerObject read(ChannelBuffer cb) throws PcepParseException {
+
+        PcepObjectHeader interLayerObjHeader;
+        boolean bNFlag;
+        boolean bIFlag;
+
+        interLayerObjHeader = PcepObjectHeader.read(cb);
+
+        //take only InterLayerObject buffer.
+        ChannelBuffer tempCb = cb.readBytes(interLayerObjHeader.getObjLen() - OBJECT_HEADER_LENGTH);
+
+        int iTemp = tempCb.readInt();
+        bIFlag = ((iTemp & (byte) IFLAG_SHIFT_VALUE) == FLAGS_SET_VALUE) ? true : false;
+        bNFlag = ((iTemp & (byte) NFLAG_SHIFT_VALUE) == FLAGS_SET_VALUE) ? true : false;
+
+        return new PcepInterLayerObjectVer1(interLayerObjHeader, bNFlag, bIFlag);
+    }
+
+    @Override
+    public int write(ChannelBuffer cb) throws PcepParseException {
+
+        //write Object header
+        int objStartIndex = cb.writerIndex();
+
+        int objLenIndex = interLayerObjHeader.write(cb);
+
+        if (objLenIndex <= 0) {
+            throw new PcepParseException(" ObjectLength Index is " + objLenIndex);
+        }
+
+        int iTemp = 0;
+
+        if (bIFlag) {
+            iTemp = iTemp | (byte) IFLAG_SHIFT_VALUE;
+        }
+        if (bNFlag) {
+            iTemp = iTemp | (byte) NFLAG_SHIFT_VALUE;
+        }
+
+        cb.writeInt(iTemp);
+
+        //Update object length now
+        int length = cb.writerIndex() - objStartIndex;
+        //will be helpful during print().
+        interLayerObjHeader.setObjLen((short) length);
+        cb.setShort(objLenIndex, (short) length);
+
+        objLenIndex = cb.writerIndex();
+        return objLenIndex;
+    }
+
+    /**
+     * Builder class for PCEP inter layer object.
+     */
+    public static class Builder implements PcepInterLayerObject.Builder {
+
+        private boolean bIsHeaderSet = false;
+        private boolean bIsNFlagset = false;
+        private boolean bIsIFlagset = false;
+
+        private PcepObjectHeader interLayerObjHeader;
+        private boolean bNFlag;
+        private boolean bIFlag;
+
+        private boolean bIsPFlagSet = false;
+        private boolean bPFalg;
+
+        private boolean bIsIFlagSet = false;
+        private boolean iFlag;
+
+        @Override
+        public PcepInterLayerObject build() {
+            PcepObjectHeader interLayerObjHeader = this.bIsHeaderSet ? this.interLayerObjHeader
+                    : DEFAULT_INTER_LAYER_OBJECT_HEADER;
+
+            boolean bNFlag = this.bIsNFlagset ? this.bNFlag : DEFAULT_NFLAG;
+            boolean bIFlag = this.bIsIFlagset ? this.bIFlag : DEFAULT_IFLAG;
+
+            if (bIsPFlagSet) {
+                interLayerObjHeader.setPFlag(bPFalg);
+            }
+
+            if (bIsIFlagSet) {
+                interLayerObjHeader.setIFlag(iFlag);
+            }
+            return new PcepInterLayerObjectVer1(interLayerObjHeader, bNFlag, bIFlag);
+        }
+
+        @Override
+        public PcepObjectHeader getInterLayerObjHeader() {
+            return this.interLayerObjHeader;
+        }
+
+        @Override
+        public Builder setInterLayerObjHeader(PcepObjectHeader obj) {
+            this.interLayerObjHeader = obj;
+            this.bIsHeaderSet = true;
+            return this;
+        }
+
+        @Override
+        public boolean getbNFlag() {
+            return this.bNFlag;
+        }
+
+        @Override
+        public Builder setbNFlag(boolean value) {
+            this.bNFlag = value;
+            this.bIsNFlagset = true;
+            return this;
+        }
+
+        @Override
+        public boolean getbIFlag() {
+            return this.bIFlag;
+        }
+
+        @Override
+        public Builder setbIFlag(boolean value) {
+            this.bIFlag = value;
+            this.bIsIFlagset = true;
+            return this;
+        }
+
+        @Override
+        public Builder setPFlag(boolean value) {
+            this.bPFalg = value;
+            this.bIsPFlagSet = true;
+            return this;
+        }
+
+        @Override
+        public Builder setIFlag(boolean value) {
+            this.iFlag = value;
+            this.bIsIFlagSet = true;
+            return this;
+        }
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass()).add("IFlag", bIFlag).add("NFlag", bNFlag).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.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;
+
+/**
+ * LabelSubObject: Provides a LabelSubObject.
+ */
+public class LabelSubObject implements PcepValueType {
+
+    /* Reference : RFC 3209
+     * LABEL Sub Object
+     *
+    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      |     Length    |    Flags      |   C-Type      |
+    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+    |       Contents of Label Object                                |
+    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     */
+    protected static final Logger log = LoggerFactory.getLogger(LabelSubObject.class);
+
+    public static final short TYPE = 0x03;
+    public static final short LENGTH = 8;
+    private final byte flags;
+    private final byte cType;
+    private final int contents;
+
+    /**
+     * constructor to initialize parameters for LabelSubObject.
+     *
+     * @param flags flags
+     * @param cType C-Type
+     * @param contents Contents of label object
+     */
+    public LabelSubObject(byte flags, byte cType, int contents) {
+        this.flags = flags;
+        this.cType = cType;
+        this.contents = contents;
+    }
+
+    /**
+     * Return an object of LabelSubObject.
+     *
+     * @param flags flags
+     * @param cType C-type
+     * @param contents contents of label objects
+     * @return object of LabelSubObject
+     */
+    public static LabelSubObject of(byte flags, byte cType, int contents) {
+        return new LabelSubObject(flags, cType, contents);
+    }
+
+    /**
+     * Returns Flags.
+     *
+     * @return flags
+     */
+    public byte getFlags() {
+        return flags;
+    }
+
+    /**
+     * Returns cType.
+     *
+     * @return cType
+     */
+    public byte getCtype() {
+        return cType;
+    }
+
+    /**
+     * Returns contents.
+     *
+     * @return contents
+     */
+    public int getContents() {
+        return contents;
+    }
+
+    @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(flags, cType, contents);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof LabelSubObject) {
+            LabelSubObject other = (LabelSubObject) obj;
+            return Objects.equals(this.flags, other.flags) && Objects.equals(this.cType, other.cType)
+                    && Objects.equals(this.contents, other.contents);
+        }
+        return false;
+    }
+
+    @Override
+    public int write(ChannelBuffer c) {
+        int iStartIndex = c.writerIndex();
+        c.writeShort(TYPE);
+        c.writeShort(LENGTH);
+        c.writeByte(flags);
+        c.writeByte(cType);
+        c.writeByte(contents);
+        return c.writerIndex() - iStartIndex;
+    }
+
+    /**
+     * Reads the channel buffer and returns object of LabelSubObject.
+     *
+     * @param c type of channel buffer
+     * @return object of LabelSubObject
+     */
+    public static PcepValueType read(ChannelBuffer c) {
+        byte flags = c.readByte();
+        byte cType = c.readByte();
+        int contents = c.readInt();
+        return new LabelSubObject(flags, cType, contents);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass()).add("type", TYPE).add("Length", LENGTH).add("flags", flags)
+                .add("C-type", cType).add("contents", contents).toString();
+    }
+}