VOL-149: Configure RADIUS Attributes as per subscriber information
VOL-148: RADIUS VLAN ID configurable

Change-Id: I2a51dbf316637e685b7e3c36595a27922c79b23c
diff --git a/src/main/java/org/opencord/aaa/RadiusCommunicator.java b/src/main/java/org/opencord/aaa/RadiusCommunicator.java
new file mode 100755
index 0000000..4809bca
--- /dev/null
+++ b/src/main/java/org/opencord/aaa/RadiusCommunicator.java
@@ -0,0 +1,64 @@
+/*
+ * 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.opencord.aaa;
+
+import org.onlab.packet.RADIUS;
+
+import org.onosproject.net.packet.InboundPacket;
+import org.onosproject.net.packet.PacketContext;
+
+/**
+ * Interface to the implementations for RADIUS server side communication.
+ */
+public interface RadiusCommunicator {
+
+    /**
+     * Does initialization required for the implementation to work and applies the
+     * relevant part of the passed configuration.
+     *
+     * @param newCfg : New configuration to be applied
+     */
+    void initializeLocalState(AaaConfig newCfg);
+    /**
+     * Clears up all local state.
+     */
+    void clearLocalState();
+    /**
+     * Shutdown, called when AAA app is deactivated.
+     */
+    void deactivate();
+    /**
+     * Provision intercepts on the switches if needed.
+     */
+    void requestIntercepts();
+    /**
+     * Clear intercepts from the switches if needed.
+     */
+    void withdrawIntercepts();
+    /**
+     * Send RADIUS packet to the RADIUS server.
+     *
+     * @param radiusPacket RADIUS packet to be sent to server.
+     * @param inPkt        Incoming EAPOL packet
+     */
+    void sendRadiusPacket(RADIUS radiusPacket, InboundPacket inPkt);
+    /**
+     * Handle packet from RADIUS server.
+     *
+     * @param context Incoming packet context.
+     */
+    void handlePacketFromServer(PacketContext context);
+}