Add netcfg for INT

Use network config subsystem to handle such configs

Change-Id: I8ec14d31c30e3d1d8cd2c703d8db5535bb8b5cd4
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/inbandtelemetry/IntDeviceConfig.java b/core/api/src/main/java/org/onosproject/net/behaviour/inbandtelemetry/IntDeviceConfig.java
index c77b7bd..e1790bc 100644
--- a/core/api/src/main/java/org/onosproject/net/behaviour/inbandtelemetry/IntDeviceConfig.java
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/inbandtelemetry/IntDeviceConfig.java
@@ -20,6 +20,7 @@
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.TpPort;
 
+import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
@@ -54,9 +55,11 @@
     private final MacAddress sinkMac;
     private final TelemetrySpec spec;
     private boolean enabled;
+    private int hopLatencySensitivity;
 
     private IntDeviceConfig(IpAddress collectorIp, TpPort collectorPort, MacAddress collectorNextHopMac,
-                            IpAddress sinkIp, MacAddress sinkMac, TelemetrySpec spec, boolean enabled) {
+                            IpAddress sinkIp, MacAddress sinkMac, TelemetrySpec spec, boolean enabled,
+                            int hopLatencySensitivity) {
         this.collectorIp = collectorIp;
         this.collectorPort = collectorPort;
         this.collectorNextHopMac = collectorNextHopMac;
@@ -64,6 +67,7 @@
         this.sinkMac = sinkMac;
         this.spec = spec;
         this.enabled = enabled;
+        this.hopLatencySensitivity = hopLatencySensitivity;
     }
 
     /**
@@ -145,6 +149,15 @@
     }
 
     /**
+     * Returns the minimal interval of hop latency change for a flow.
+     *
+     * @return the minimal interval of hop latency change for a flow.
+     */
+    public int minFlowHopLatencyChangeNs() {
+        return hopLatencySensitivity;
+    }
+
+    /**
      * Returns a new builder.
      *
      * @return new builder
@@ -165,6 +178,7 @@
         private MacAddress sinkMac;
         private TelemetrySpec spec = TelemetrySpec.INT;
         private boolean enabled = false;
+        int minFlowHopLatencyChangeNs = 0;
 
         /**
          * Assigns a collector IP address to the IntConfig object.
@@ -246,6 +260,17 @@
         }
 
         /**
+         * Sets the minimal interval of hop latency change for a flow.
+         *
+         * @param value the minimal interval of hop latency change for a flow
+         * @return an IntConfig builder
+         */
+        public IntDeviceConfig.Builder withMinFlowHopLatencyChangeNs(int value) {
+            this.minFlowHopLatencyChangeNs = value;
+            return this;
+        }
+
+        /**
          * Builds the IntConfig object.
          *
          * @return an IntConfig object
@@ -253,11 +278,10 @@
         public IntDeviceConfig build() {
             checkNotNull(collectorIp, "Collector IP should be specified.");
             checkNotNull(collectorPort, "Collector port number should be specified.");
-            checkNotNull(collectorNextHopMac, "Next hop MAC address for report packets should be provided.");
-            checkNotNull(sinkIp, "Sink IP address for report packets should be specified.");
-            checkNotNull(sinkMac, "Sink MAC address for report packets should be specified.");
+            checkArgument(minFlowHopLatencyChangeNs >= 0, "Hop latency sensitivity must be positive or zero");
+
             return new IntDeviceConfig(collectorIp, collectorPort, collectorNextHopMac,
-                                 sinkIp, sinkMac, spec, enabled);
+                                 sinkIp, sinkMac, spec, enabled, minFlowHopLatencyChangeNs);
         }
     }
 }
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/inbandtelemetry/IntReportConfig.java b/core/api/src/main/java/org/onosproject/net/behaviour/inbandtelemetry/IntReportConfig.java
new file mode 100644
index 0000000..95a8fe5
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/inbandtelemetry/IntReportConfig.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright 2020-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.net.behaviour.inbandtelemetry;
+
+import com.google.common.annotations.Beta;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.TpPort;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.config.Config;
+import org.onosproject.ui.JsonUtils;
+
+/**
+ * Application level configuration of the INT process.
+ * Config example:
+ * {
+ *   "apps": {
+ *     "org.onosproject.inbandtelemetry": {
+ *       "report": {
+ *         "collectorIp": "192.168.0.1",
+ *         "collectorPort": 5500,
+ *         "minFlowHopLatencyChangeNs": 300
+ *       }
+ *     }
+ *   }
+ * }
+ */
+@Beta
+public final class IntReportConfig extends Config<ApplicationId> {
+    private static final String COLLECTOR_IP = "collectorIp";
+    private static final String COLLECTOR_PORT = "collectorPort";
+    private static final String MIN_FLOW_HOP_LATENCY_CHANGE_NS = "minFlowHopLatencyChangeNs";
+    private static final String COLLECTOR_NEXT_HOP_MAC = "collectorNextHopMac";
+    private static final String SINK_IP = "sinkIp";
+    private static final String SINK_MAC = "sinkMac";
+
+    /**
+     * IP address of the collector.
+     * This is the destination IP address that will be used for all INT reports
+     * generated by all INT devices.
+     *
+     * @return collector IP address, null if not present
+     */
+    public IpAddress collectorIp() {
+        if (object.hasNonNull(COLLECTOR_IP)) {
+            return IpAddress.valueOf(JsonUtils.string(object, COLLECTOR_IP));
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * UDP port number of the collector.
+     * This is the destination UDP port number that will be used for all INT reports
+     * generated by all INT devices.
+     *
+     * @return collector UDP port number, null if not present
+     */
+    public TpPort collectorPort() {
+        if (object.hasNonNull(COLLECTOR_PORT)) {
+            return TpPort.tpPort((int) JsonUtils.number(object, COLLECTOR_PORT));
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Gets the minimal interval of hop latency change for a flow.
+     * This value is used to instruct an INT-capable device to produce reports
+     * only for packets which hop latency changed by at least minFlowHopLatencyChangeNs
+     * from the previously reported value for the same flow (5-tuple), i.e., produce a
+     * report only if `(currentHopLatency - previousHopLatency) > minFlowHopLatencyChangeNs`.
+     * Some device implementations might support only specific intervals, e.g., powers of 2.
+     *
+     * @return Interval in nanoseconds
+     */
+    public int minFlowHopLatencyChangeNs() {
+        if (object.hasNonNull(MIN_FLOW_HOP_LATENCY_CHANGE_NS)) {
+            return (int) JsonUtils.number(object, MIN_FLOW_HOP_LATENCY_CHANGE_NS);
+        } else {
+            return 0;
+        }
+    }
+
+    /**
+     * Returns MAC address of next hop of INT report packets.
+     * This can be either MAC address of the collector or a router.
+     * This is an optional parameter, which means that the usage of this
+     * parameter depends on IntProgrammable implementation.
+     * (e.g., If a report packet needs to be routed to reach the collector,
+     * IntProgrammable will ignore this value and choose next hop router's MAC address.
+     * If a collector itself is the next hop of INT report packets, then
+     * this value will be used as a destination MAC address for all INT report packets.)
+     *
+     * @return MAC address of next hop of INT report packets, null if not present
+     */
+    public MacAddress collectorNextHopMac() {
+        if (object.hasNonNull(COLLECTOR_NEXT_HOP_MAC)) {
+            return MacAddress.valueOf(JsonUtils.string(object, COLLECTOR_NEXT_HOP_MAC));
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Returns IP address of the sink device.
+     * All sink devices share this address as the source IP address
+     * for all INT reports.
+     *
+     * @return sink device's IP address, null if not present
+     */
+    public IpAddress sinkIp() {
+        if (object.hasNonNull(SINK_IP)) {
+            return IpAddress.valueOf(JsonUtils.string(object, SINK_IP));
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Returns MAC address of the sink device.
+     * All sink devices share this address as the source MAC address
+     * for all INT reports.
+     *
+     * @return sink device's MAC address, null if not present
+     */
+    public MacAddress sinkMac() {
+        if (object.hasNonNull(SINK_MAC)) {
+            return MacAddress.valueOf(JsonUtils.string(object, SINK_MAC));
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Sets the collector IP to the config.
+     *
+     * @param collectorIp the collector IP
+     * @return the config
+     */
+    public IntReportConfig setCollectorIp(IpAddress collectorIp) {
+        return (IntReportConfig) setOrClear(COLLECTOR_IP, collectorIp.toString());
+    }
+
+    /**
+     * Sets the collector port to the config.
+     *
+     * @param port the collector port
+     * @return the config
+     */
+    public IntReportConfig setCollectorPort(TpPort port) {
+        return (IntReportConfig) setOrClear(COLLECTOR_PORT, port.toInt());
+    }
+
+    /**
+     * Sets the minimal interval of hop latency change
+     * for a flow to the config.
+     *
+     * @param ns the value of hop latency change
+     * @return the config
+     */
+    public IntReportConfig setMinFlowHopLatencyChangeNs(int ns) {
+        return (IntReportConfig) setOrClear(MIN_FLOW_HOP_LATENCY_CHANGE_NS, ns);
+    }
+
+    /**
+     * Sets collector next hop mac address to the config.
+     *
+     * @param collectorNextHopMac the collector next hop mac address
+     * @return the config
+     */
+    public IntReportConfig setCollectorNextHopMac(MacAddress collectorNextHopMac) {
+        return (IntReportConfig) setOrClear(COLLECTOR_NEXT_HOP_MAC, collectorNextHopMac.toString());
+    }
+
+    /**
+     * Sets the sink IP address to the config.
+     *
+     * @param sinkIp the sink IP address
+     * @return the config
+     */
+    public IntReportConfig setSinkIp(IpAddress sinkIp) {
+        return (IntReportConfig) setOrClear(SINK_IP, sinkIp.toString());
+    }
+
+    /**
+     * Sets the sink mac address to the config.
+     *
+     * @param sinkMac the sink mac address
+     * @return the config
+     */
+    public IntReportConfig setSinkMac(MacAddress sinkMac) {
+        return (IntReportConfig) setOrClear(SINK_MAC, sinkMac.toString());
+    }
+}