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/*
* Copyright 2014-2015 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.ui.impl.topo;
import org.onosproject.net.ConnectPoint;
import org.onosproject.net.Device;
import org.onosproject.net.DeviceId;
import org.onosproject.net.Host;
import org.onosproject.net.HostId;
import org.onosproject.net.Link;
import org.onosproject.net.device.DeviceService;
import org.onosproject.net.flow.FlowRule;
import org.onosproject.net.host.HostService;
import org.onosproject.net.intent.FlowRuleIntent;
import org.onosproject.net.intent.HostToHostIntent;
import org.onosproject.net.intent.Intent;
import org.onosproject.net.intent.IntentService;
import org.onosproject.net.intent.LinkCollectionIntent;
import org.onosproject.net.intent.MultiPointToSinglePointIntent;
import org.onosproject.net.intent.OpticalConnectivityIntent;
import org.onosproject.net.intent.PathIntent;
import org.onosproject.net.intent.PointToPointIntent;
import org.onosproject.net.link.LinkService;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import static org.onosproject.net.intent.IntentState.INSTALLED;
/**
* Auxiliary facility to query the intent service based on the specified
* set of end-station hosts, edge points or infrastructure devices.
*/
public class TopoIntentFilter {
private final IntentService intentService;
private final DeviceService deviceService;
private final HostService hostService;
private final LinkService linkService;
/**
* Creates an intent filter.
*
* @param services service references bundle
*/
public TopoIntentFilter(ServicesBundle services) {
this.intentService = services.intentService();
this.deviceService = services.deviceService();
this.hostService = services.hostService();
this.linkService = services.linkService();
}
/**
* Finds all path (host-to-host or point-to-point) intents that pertain
* to the given hosts and devices.
*
* @param hosts set of hosts to query by
* @param devices set of devices to query by
* @return set of intents that 'match' all hosts and devices given
*/
public List<Intent> findPathIntents(Set<Host> hosts, Set<Device> devices) {
// start with all intents
Iterable<Intent> sourceIntents = intentService.getIntents();
// Derive from this the set of edge connect points.
Set<ConnectPoint> edgePoints = getEdgePoints(hosts);
// Iterate over all intents and produce a set that contains only those
// intents that target all selected hosts or derived edge connect points.
return getIntents(hosts, devices, edgePoints, sourceIntents);
}
// Produces a set of edge points from the specified set of hosts.
private Set<ConnectPoint> getEdgePoints(Set<Host> hosts) {
Set<ConnectPoint> edgePoints = new HashSet<>();
for (Host host : hosts) {
edgePoints.add(host.location());
}
return edgePoints;
}
// Produces a list of intents that target all selected hosts, devices or connect points.
private List<Intent> getIntents(Set<Host> hosts, Set<Device> devices,
Set<ConnectPoint> edgePoints,
Iterable<Intent> sourceIntents) {
List<Intent> intents = new ArrayList<>();
if (hosts.isEmpty() && devices.isEmpty()) {
return intents;
}
Set<OpticalConnectivityIntent> opticalIntents = new HashSet<>();
// Search through all intents and see if they are relevant to our search.
for (Intent intent : sourceIntents) {
if (intentService.getIntentState(intent.key()) == INSTALLED) {
boolean isRelevant = false;
if (intent instanceof HostToHostIntent) {
isRelevant = isIntentRelevantToHosts((HostToHostIntent) intent, hosts) &&
isIntentRelevantToDevices(intent, devices);
} else if (intent instanceof PointToPointIntent) {
isRelevant = isIntentRelevant((PointToPointIntent) intent, edgePoints) &&
isIntentRelevantToDevices(intent, devices);
} else if (intent instanceof MultiPointToSinglePointIntent) {
isRelevant = isIntentRelevant((MultiPointToSinglePointIntent) intent, edgePoints) &&
isIntentRelevantToDevices(intent, devices);
} else if (intent instanceof OpticalConnectivityIntent) {
opticalIntents.add((OpticalConnectivityIntent) intent);
}
// TODO: add other intents, e.g. SinglePointToMultiPointIntent
if (isRelevant) {
intents.add(intent);
}
}
}
// As a second pass, try to link up any optical intents with the
// packet-level ones.
for (OpticalConnectivityIntent intent : opticalIntents) {
if (isIntentRelevant(intent, intents) &&
isIntentRelevantToDevices(intent, devices)) {
intents.add(intent);
}
}
return intents;
}
// Indicates whether the specified intent involves all of the given hosts.
private boolean isIntentRelevantToHosts(HostToHostIntent intent, Iterable<Host> hosts) {
for (Host host : hosts) {
HostId id = host.id();
// Bail if intent does not involve this host.
if (!id.equals(intent.one()) && !id.equals(intent.two())) {
return false;
}
}
return true;
}
// Indicates whether the specified intent involves all of the given devices.
private boolean isIntentRelevantToDevices(Intent intent, Iterable<Device> devices) {
List<Intent> installables = intentService.getInstallableIntents(intent.key());
for (Device device : devices) {
if (!isIntentRelevantToDevice(installables, device)) {
return false;
}
}
return true;
}
// Indicates whether the specified intent involves the given device.
private boolean isIntentRelevantToDevice(List<Intent> installables, Device device) {
if (installables != null) {
for (Intent installable : installables) {
if (installable instanceof PathIntent) {
PathIntent pathIntent = (PathIntent) installable;
if (pathContainsDevice(pathIntent.path().links(), device.id())) {
return true;
}
} else if (installable instanceof FlowRuleIntent) {
FlowRuleIntent flowRuleIntent = (FlowRuleIntent) installable;
if (rulesContainDevice(flowRuleIntent.flowRules(), device.id())) {
return true;
}
} else if (installable instanceof LinkCollectionIntent) {
LinkCollectionIntent linksIntent = (LinkCollectionIntent) installable;
if (pathContainsDevice(linksIntent.links(), device.id())) {
return true;
}
}
}
}
return false;
}
// Indicates whether the specified links involve the given device.
private boolean pathContainsDevice(Iterable<Link> links, DeviceId id) {
for (Link link : links) {
if (link.src().elementId().equals(id) || link.dst().elementId().equals(id)) {
return true;
}
}
return false;
}
// Indicates whether the specified flow rules involvesthe given device.
private boolean rulesContainDevice(Collection<FlowRule> flowRules, DeviceId id) {
for (FlowRule rule : flowRules) {
if (rule.deviceId().equals(id)) {
return true;
}
}
return false;
}
private boolean isIntentRelevant(PointToPointIntent intent,
Iterable<ConnectPoint> edgePoints) {
for (ConnectPoint point : edgePoints) {
// Bail if intent does not involve this edge point.
if (!point.equals(intent.egressPoint()) &&
!point.equals(intent.ingressPoint())) {
return false;
}
}
return true;
}
// Indicates whether the specified intent involves all of the given edge points.
private boolean isIntentRelevant(MultiPointToSinglePointIntent intent,
Iterable<ConnectPoint> edgePoints) {
for (ConnectPoint point : edgePoints) {
// Bail if intent does not involve this edge point.
if (!point.equals(intent.egressPoint()) &&
!intent.ingressPoints().contains(point)) {
return false;
}
}
return true;
}
// Indicates whether the specified intent involves all of the given edge points.
private boolean isIntentRelevant(OpticalConnectivityIntent opticalIntent,
Iterable<Intent> intents) {
Link ccSrc = getFirstLink(opticalIntent.getSrc(), false);
Link ccDst = getFirstLink(opticalIntent.getDst(), true);
if (ccSrc == null || ccDst == null) {
return false;
}
for (Intent intent : intents) {
List<Intent> installables = intentService.getInstallableIntents(intent.key());
for (Intent installable : installables) {
if (installable instanceof PathIntent) {
List<Link> links = ((PathIntent) installable).path().links();
if (links.size() == 3) {
Link tunnel = links.get(1);
if (Objects.equals(tunnel.src(), ccSrc.src()) &&
Objects.equals(tunnel.dst(), ccDst.dst())) {
return true;
}
}
}
}
}
return false;
}
private Link getFirstLink(ConnectPoint point, boolean ingress) {
for (Link link : linkService.getLinks(point)) {
if (point.equals(ingress ? link.src() : link.dst())) {
return link;
}
}
return null;
}
}
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