1 files changed, 154 insertions, 0 deletions
diff --git a/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepKeepaliveMsgVer1.java b/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepKeepaliveMsgVer1.java
new file mode 100644
index 00000000..8b6e9382
--- /dev/null
+++ b/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepKeepaliveMsgVer1.java
@@ -0,0 +1,154 @@
+/*
+ * 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.PcepKeepaliveMsg;
+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;
+
+/**
+ * Provides PCEP keep alive message.
+ */
+class PcepKeepaliveMsgVer1 implements PcepKeepaliveMsg {
+
+    /*
+    <Keepalive Message>::= <Common Header>
+
+     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
+    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+    | Ver |  Flags  |  Message-Type |       Message-Length          |
+    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     */
+
+    protected static final Logger log = LoggerFactory.getLogger(PcepKeepaliveMsgVer1.class);
+    // Pcep version: 1
+    public static final byte PACKET_VERSION = 1;
+    public static final int PACKET_MINIMUM_LENGTH = 4;
+    public static final PcepType MSG_TYPE = PcepType.KEEP_ALIVE;
+
+    public static final PcepKeepaliveMsgVer1.Reader READER = new Reader();
+
+    /**
+     * Reader class for reading PCEP keepalive message from channel buffer.
+     */
+    static class Reader implements PcepMessageReader<PcepKeepaliveMsg> {
+
+        @Override
+        public PcepKeepaliveMsg readFrom(ChannelBuffer cb) throws PcepParseException {
+
+            if (cb.readableBytes() < PACKET_MINIMUM_LENGTH) {
+                throw new PcepParseException("Packet size is less than the minimum required 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.KEEP_ALIVE_1(2), got=" + version);
+            }
+            // fixed value property type == 2
+            byte type = cb.readByte();
+            if (type != MSG_TYPE.getType()) {
+                throw new PcepParseException("Wrong type: Expected=PcepType.KEEP_ALIVE_1(2), got=" + type);
+            }
+            short length = cb.readShort();
+            if (length < PACKET_MINIMUM_LENGTH) {
+                throw new PcepParseException("Wrong length: Expected to be >= " + PACKET_MINIMUM_LENGTH + ", was: "
+                        + length);
+            }
+            return new PcepKeepaliveMsgVer1();
+        }
+    }
+
+    /**
+     * Default constructor.
+     */
+    PcepKeepaliveMsgVer1() {
+    }
+
+    /**
+     * Builder class for PCEP keepalive message.
+     */
+    static class Builder implements PcepKeepaliveMsg.Builder {
+        @Override
+        public PcepVersion getVersion() {
+            return PcepVersion.PCEP_1;
+        }
+
+        @Override
+        public PcepType getType() {
+            return PcepType.KEEP_ALIVE;
+        }
+
+        @Override
+        public PcepKeepaliveMsg build() {
+            return new PcepKeepaliveMsgVer1();
+        }
+    }
+
+    @Override
+    public void writeTo(ChannelBuffer cb) {
+        WRITER.write(cb, this);
+    }
+
+    static final Writer WRITER = new Writer();
+
+    /**
+     * Writer class for writing the PCEP keepalive message to channel buffer.
+     */
+    static class Writer implements PcepMessageWriter<PcepKeepaliveMsgVer1> {
+
+        @Override
+        public void write(ChannelBuffer cb, PcepKeepaliveMsgVer1 message) {
+            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 is length of variable message, will be updated at the end
+            // Store the position of message
+            // length in buffer
+            int msgLenIndex = cb.writerIndex();
+            cb.writeShort((short) 0);
+            // 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 String toString() {
+        return MoreObjects.toStringHelper(getClass()).toString();
+    }
+}