lishuai
Committed by Gerrit Code Review

[ONOS-3478] Add the implementation of SnatService interface.

Change-Id: Idae0300b8254a01e8e49abd77f9abd13c4b357fe
/*
* 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());
}
}
}