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Code Block

language	java
title	ForwardingMapService.java
collapse	true

/*
 * Copyright 2014 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.onlab.onos.net.apps;

import java.util.Map;
import org.onlab.onos.net.HostId;

/**
 * A demonstrative service for the intent reactive forwarding application to
 * export.
 */
public interface ForwardingMapService {

    /**
     * Get the endpoints of the host-to-host intents that were installed.
     *
     * @return maps of source to destination
     */
    public Map<HostId, HostId> getEndPoints();

}

...

Code Block

language	java
title	IntentReactiveForwarding.java
collapse	true

/*
 * Copyright 2014 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.onlab.onos.ifwd;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.apache.felix.scr.annotations.Service;
import org.onlab.onos.core.ApplicationId;
import org.onlab.onos.core.CoreService;
import org.onlab.onos.net.Host;
import org.onlab.onos.net.HostId;
import org.onlab.onos.net.PortNumber;
import org.onlab.onos.net.apps.ForwardingMapService;
import org.onlab.onos.net.flow.DefaultTrafficSelector;
import org.onlab.onos.net.flow.DefaultTrafficTreatment;
import org.onlab.onos.net.flow.TrafficSelector;
import org.onlab.onos.net.flow.TrafficTreatment;
import org.onlab.onos.net.host.HostService;
import org.onlab.onos.net.intent.HostToHostIntent;
import org.onlab.onos.net.intent.IntentService;
import org.onlab.onos.net.packet.DefaultOutboundPacket;
import org.onlab.onos.net.packet.InboundPacket;
import org.onlab.onos.net.packet.OutboundPacket;
import org.onlab.onos.net.packet.PacketContext;
import org.onlab.onos.net.packet.PacketProcessor;
import org.onlab.onos.net.packet.PacketService;
import org.onlab.onos.net.topology.TopologyService;
import org.onlab.packet.Ethernet;
import org.slf4j.Logger;


import static org.slf4j.LoggerFactory.getLogger;


@Component(immediate = true)
@Service
public class IntentReactiveForwarding implements ForwardingMapService {

	private final Logger log = getLogger(getClass());

    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
    protected CoreService coreService;

    // ...<snip>...
 
    // Install a rule forwarding the packet to the specified port.
    private void setUpConnectivity(PacketContext context, HostId srcId, HostId dstId) {
        TrafficSelector selector = DefaultTrafficSelector.builder().build();
        TrafficTreatment treatment = DefaultTrafficTreatment.builder().build();
        HostToHostIntent intent = new HostToHostIntent(appId, srcId, dstId,
                                                       selector, treatment);
        intentService.submit(intent);
    }
 
    // the new service method, to be filled out
    @Override
    public Map<HostId, HostId> getEndPoints() {
        return null;
    }
}

...

Code Block

language	java
title	ForwardingMapCommand.java
collapse	true

/*
 * Copyright 2014 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.onlab.onos.cli.net;

 
import org.apache.karaf.shell.commands.Argument;
import org.apache.karaf.shell.commands.Command;
import org.onlab.onos.cli.AbstractShellCommand;
import org.onlab.onos.net.HostId;

/**
 * Lists the endpoints for which intents are installed.
 */
@Command(scope = "onos", name = "fwdmap",
        description = "Lists the endpoints for which intents are installed")
public class ForwardingMapCommand extends AbstractShellCommand {
 
    @Argument(index = 0, name = "hostId", description = "Host ID of source",
            required = false, multiValued = false)
    private HostId hostId = null;

    @Override
    protected void execute() {
    }
}

...

2. Incorporate the new service.

3. Register the command with Karaf CLI.

Next, we implement the command. In our case, it is pretty simple - we ask the service for its endpoint map, and if we were given a host ID, we search for it in the map. The full class definition looks like this:

Code Block

title	ForwardingMapCommand.java
collapse	true

/*
 * Copyright 2014 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.onlab.onos.cli.net;

import java.util.Map;

import org.apache.karaf.shell.commands.Argument;
import org.apache.karaf.shell.commands.Command;
import org.onlab.onos.cli.AbstractShellCommand;
import org.onlab.onos.net.HostId;
import org.onlab.onos.net.apps.ForwardingMapService;

/**
 * Lists the endpoints for which intents are installed.
 */
@Command(scope = "onos", name = "fwdmap",
        description = "Lists the endpoints for which intents are installed")
public class ForwardingMapCommand extends AbstractShellCommand {
 
    // formatted string for output to CLI
    private static final String FMT = "src=%s, dst=%s";

    @Argument(index = 0, name = "hostId", description = "Host ID of source",
            required = false, multiValued = false)
    private HostId hostId = null;

    // reference to our service
    private ForwardingMapService service;
    // to hold the service's response
    private Map<HostId, HostId> hmap;

    @Override
    protected void execute() {
        // get a reference to our service
        service = get(ForwardingMapService.class);

        /*
         * getEndPoints() returns an empty map even if it contains nothing, so
         * we don't need to check for null hmap here.
         */
        hmap = service.getEndPoints();

        // check for an argument, then display information accordingly
        if (hostId != null) {
            // we were given a hostId to filter on, print only those that match
            for (Map.Entry<HostId, HostId> el : hmap.entrySet()) {
                if (el.getKey().equals(hostId)) {
                    print(FMT, el.getKey(), el.getValue());
                }
            }
        } else {
            // print everything we have
            for (Map.Entry<HostId, HostId> el : hmap.entrySet()) {
                print(FMT, el.getKey(), el.getValue());
            }
        }
    }
}

3. Register the command with Karaf CLI.

Next, we need to tell Karaf about our new command by editing shell-config.xml, located in ONOS_ROOT/cli/src/main/resources/OSGI-INF/blueprint/. need to tell Karaf about our new command by editing shell-config.xml, located in ONOS_ROOT/cli/src/main/resources/OSGI-INF/blueprint/. We append the following to the contents between the <command-bundle></command-bundle> clause:

Code Block

language	xml
title	shell-config.xml

        <command>
            <!--Our command implementation's FQDN-->
            <action class="org.onlab.onos.cli.net.ForwardingMapCommand"/>
            <!--A command completer for Host IDs-->
            <completers>
                <ref component-id="hostIdCompleter"/>
                <null/>
            </completers>
        </command>

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Versions Compared

Old Version 9

New Version 10

Key

2. Incorporate the new service.

3. Register the command with Karaf CLI.

3. Register the command with Karaf CLI.

4. Try the command out.