[ONOS-2359]Implementation of PCEP LabelReserve message
Change-Id: Ie74340f5fe5e93d9bb277dd3551ba175ac74494c
diff --git a/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepLabelRangeResvMsgVer1.java b/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepLabelRangeResvMsgVer1.java
new file mode 100644
index 0000000..2b6b9c8
--- /dev/null
+++ b/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepLabelRangeResvMsgVer1.java
@@ -0,0 +1,189 @@
+/*
+ * 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.protocol.ver1;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.pcepio.exceptions.PcepParseException;
+import org.onosproject.pcepio.protocol.PcepLabelRange;
+import org.onosproject.pcepio.protocol.PcepLabelRangeResvMsg;
+import org.onosproject.pcepio.protocol.PcepMessageReader;
+import org.onosproject.pcepio.protocol.PcepMessageWriter;
+import org.onosproject.pcepio.protocol.PcepType;
+import org.onosproject.pcepio.protocol.PcepVersion;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.MoreObjects;
+
+class PcepLabelRangeResvMsgVer1 implements PcepLabelRangeResvMsg {
+
+ // Pcep version: 1
+
+ /*
+ The format of a PCLRResv message is as follows:
+
+ PCLRResv Message>::= <Common Header>
+ <label-range>
+ Where:
+
+ <label-range> ::= <SRP>
+ <labelrange-list>
+
+ Where
+ <labelrange-list>::=<LABEL-RANGE>[<labelrange-list>]
+ */
+ protected static final Logger log = LoggerFactory.getLogger(PcepLabelRangeResvMsgVer1.class);
+
+ public static final byte PACKET_VERSION = 1;
+ // LabelRangeResvMsgMinLength = COMMON-HEADER(4)+SrpObjMinLentgh(12)+LABEL-RANGE-MIN-LENGTH(12)
+ public static final int PACKET_MINIMUM_LENGTH = 28;
+ public static final PcepType MSG_TYPE = PcepType.LABEL_RANGE_RESERV;
+ //<label-range>
+ PcepLabelRange labelRange;
+
+ public static final PcepLabelRangeResvMsgVer1.Reader READER = new Reader();
+
+ //Reader reads LabelRangeResv Message from the channel.
+ static class Reader implements PcepMessageReader<PcepLabelRangeResvMsg> {
+
+ @Override
+ public PcepLabelRangeResvMsg readFrom(ChannelBuffer cb) throws PcepParseException {
+
+ if (cb.readableBytes() < PACKET_MINIMUM_LENGTH) {
+ throw new PcepParseException("Channel buffer has less readable bytes than Packet minimum length.");
+ }
+ // fixed value property version == 1
+ byte version = cb.readByte();
+ version = (byte) (version >> PcepMessageVer1.SHIFT_FLAG);
+ if (version != PACKET_VERSION) {
+ throw new PcepParseException("Wrong version. Expected=PcepVersion.PCEP_1(1), got=" + version);
+ }
+ // fixed value property type == 15
+ byte type = cb.readByte();
+ if (type != MSG_TYPE.getType()) {
+ throw new PcepParseException("Wrong type. Expected=PcepType.LABEL_RANGE_RESERV(15), got=" + type);
+ }
+ short length = cb.readShort();
+ if (length < PACKET_MINIMUM_LENGTH) {
+ throw new PcepParseException("Wrong length.Expected to be >= " + PACKET_MINIMUM_LENGTH + ", is: "
+ + length);
+ }
+ // parse <label-range>
+ PcepLabelRange labelRange = PcepLabelRangeVer1.read(cb);
+ return new PcepLabelRangeResvMsgVer1(labelRange);
+ }
+ }
+
+ /**
+ * Constructor to initialize PCEP label range.
+ *
+ * @param labelRange PCEP label range
+ */
+ PcepLabelRangeResvMsgVer1(PcepLabelRange labelRange) {
+ this.labelRange = labelRange;
+ }
+
+ /**
+ * Builder class for PCEP label range reserve message.
+ */
+ static class Builder implements PcepLabelRangeResvMsg.Builder {
+
+ PcepLabelRange labelRange = new PcepLabelRangeVer1();
+
+ @Override
+ public PcepVersion getVersion() {
+ return PcepVersion.PCEP_1;
+ }
+
+ @Override
+ public PcepType getType() {
+ return PcepType.LABEL_RANGE_RESERV;
+ }
+
+ @Override
+ public PcepLabelRangeResvMsg build() {
+ return new PcepLabelRangeResvMsgVer1(this.labelRange);
+ }
+
+ @Override
+ public PcepLabelRange getLabelRange() {
+ return this.labelRange;
+ }
+
+ @Override
+ public Builder setLabelRange(PcepLabelRange labelRange) {
+ this.labelRange = labelRange;
+ return this;
+ }
+ }
+
+ @Override
+ public void writeTo(ChannelBuffer cb) throws PcepParseException {
+ WRITER.write(cb, this);
+ }
+
+ static final Writer WRITER = new Writer();
+
+ //Writer writes LabelRangeResv Message to the channel.
+ static class Writer implements PcepMessageWriter<PcepLabelRangeResvMsgVer1> {
+
+ @Override
+ public void write(ChannelBuffer cb, PcepLabelRangeResvMsgVer1 message) throws PcepParseException {
+
+ int startIndex = cb.writerIndex();
+ // first 3 bits set to version
+ cb.writeByte((byte) (PACKET_VERSION << PcepMessageVer1.SHIFT_FLAG));
+ // message type
+ cb.writeByte(MSG_TYPE.getType());
+ // Length will be set after calculating length, but currently set it as 0.
+ int msgLenIndex = cb.writerIndex();
+
+ cb.writeShort((short) 0);
+ //write Label Range
+ message.labelRange.write(cb);
+
+ // update message length field
+ int length = cb.writerIndex() - startIndex;
+ cb.setShort(msgLenIndex, (short) length);
+ }
+ }
+
+ @Override
+ public PcepVersion getVersion() {
+ return PcepVersion.PCEP_1;
+ }
+
+ @Override
+ public PcepType getType() {
+ return MSG_TYPE;
+ }
+
+ @Override
+ public PcepLabelRange getLabelRange() {
+ return this.labelRange;
+ }
+
+ @Override
+ public void setLabelRange(PcepLabelRange lr) {
+ this.labelRange = lr;
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(getClass()).add("labelRange", labelRange).toString();
+ }
+}