[ONOS-3478] Add the implementation of SnatService interface.
Change-Id: Idae0300b8254a01e8e49abd77f9abd13c4b357fe
diff --git a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/impl/SnatServiceImpl.java b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/impl/SnatServiceImpl.java
new file mode 100644
index 0000000..0f09095
--- /dev/null
+++ b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/impl/SnatServiceImpl.java
@@ -0,0 +1,90 @@
+/*
+ * 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.vtn.table.impl;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.slf4j.LoggerFactory.getLogger;
+
+import org.onlab.osgi.DefaultServiceDirectory;
+import org.onlab.osgi.ServiceDirectory;
+import org.onlab.packet.Ethernet;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.IpPrefix;
+import org.onlab.packet.MacAddress;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.flowobjective.DefaultForwardingObjective;
+import org.onosproject.net.flowobjective.FlowObjectiveService;
+import org.onosproject.net.flowobjective.ForwardingObjective;
+import org.onosproject.net.flowobjective.ForwardingObjective.Flag;
+import org.onosproject.net.flowobjective.Objective;
+import org.onosproject.vtn.table.SnatService;
+import org.onosproject.vtnrsc.SegmentationId;
+import org.slf4j.Logger;
+
+/**
+ * Provides implementation of SnatService.
+ */
+public class SnatServiceImpl implements SnatService {
+ private final Logger log = getLogger(getClass());
+
+ private static final int SNAT_PRIORITY = 0xffff;
+ private static final int PREFIC_LENGTH = 32;
+
+ private final FlowObjectiveService flowObjectiveService;
+ private final ApplicationId appId;
+
+ /**
+ * Construct a SnatServiceImpl object.
+ *
+ * @param appId the application id of vtn
+ */
+ public SnatServiceImpl(ApplicationId appId) {
+ this.appId = checkNotNull(appId, "ApplicationId can not be null");
+ ServiceDirectory serviceDirectory = new DefaultServiceDirectory();
+ this.flowObjectiveService = serviceDirectory.get(FlowObjectiveService.class);
+ }
+
+ @Override
+ public void programRules(DeviceId deviceId, SegmentationId matchVni,
+ IpAddress srcIP, MacAddress ethDst,
+ MacAddress ethSrc, IpAddress ipSrc,
+ SegmentationId actionVni, Objective.Operation type) {
+ TrafficSelector selector = DefaultTrafficSelector.builder()
+ .matchEthType(Ethernet.TYPE_IPV4)
+ .matchTunnelId(Long.parseLong(matchVni.segmentationId()))
+ .matchIPSrc(IpPrefix.valueOf(srcIP, PREFIC_LENGTH)).build();
+
+ TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
+ treatment.setEthDst(ethDst).setEthSrc(ethSrc).setIpSrc(ipSrc)
+ .setTunnelId(Long.parseLong(actionVni.segmentationId()));
+ ForwardingObjective.Builder objective = DefaultForwardingObjective
+ .builder().withTreatment(treatment.build())
+ .withSelector(selector).fromApp(appId).withFlag(Flag.SPECIFIC)
+ .withPriority(SNAT_PRIORITY);
+ if (type.equals(Objective.Operation.ADD)) {
+ log.debug("RouteRules-->ADD");
+ flowObjectiveService.forward(deviceId, objective.add());
+ } else {
+ log.debug("RouteRules-->REMOVE");
+ flowObjectiveService.forward(deviceId, objective.remove());
+ }
+ }
+}