[CORD-1616] Supports PD by DHCP relay App
Change-Id: I9a23534023ca2847bd3f77a3f9ee2b468c5bb422
diff --git a/apps/routing/fpm/app/src/main/java/org/onosproject/routing/fpm/protocol/RouteAttributePriority.java b/apps/routing/fpm/app/src/main/java/org/onosproject/routing/fpm/protocol/RouteAttributePriority.java
new file mode 100644
index 0000000..2c45db0
--- /dev/null
+++ b/apps/routing/fpm/app/src/main/java/org/onosproject/routing/fpm/protocol/RouteAttributePriority.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.routing.fpm.protocol;
+
+import com.google.common.base.MoreObjects;
+import org.onlab.packet.DeserializationException;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import java.nio.ByteBuffer;
+
+/**
+ * Priority route attribute.
+ */
+public final class RouteAttributePriority extends RouteAttribute {
+
+ private static final int VALUE_LENGTH = 4;
+
+ private final long priority;
+
+ /**
+ * Class constructor.
+ *
+ * @param length length
+ * @param type type
+ * @param priority priority
+ */
+ public RouteAttributePriority(int length, int type, long priority) {
+ super(length, type);
+
+ this.priority = priority;
+ }
+
+ /**
+ * Returns the priority.
+ *
+ * @return priority
+ */
+ public long priority() {
+ return priority;
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(getClass())
+ .add("type", type())
+ .add("length", length())
+ .add("priority", priority)
+ .toString();
+ }
+
+ /**
+ * Returns a decoder for a priority route attribute.
+ *
+ * @return priority route attribute decoder
+ */
+ public static RouteAttributeDecoder<RouteAttributePriority> decoder() {
+ return (int length, int type, byte[] value) -> {
+ if (value.length != VALUE_LENGTH) {
+ throw new DeserializationException("Wrong value length");
+ }
+
+ long priority = Integer.reverseBytes(ByteBuffer.wrap(value).getInt());
+
+ return new RouteAttributePriority(length, type, priority);
+ };
+ }
+
+ /**
+ * Encode the RouteAttributePriority contents into the ChannelBuffer.
+ *
+ * @param cb channelbuffer to be filled in
+ */
+ @Override
+ public void encode(ChannelBuffer cb) {
+
+ cb.writeShort(Short.reverseBytes((short) length()));
+ cb.writeShort(Short.reverseBytes((short) type()));
+ cb.writeInt(Integer.reverseBytes((int) priority));
+ }
+}