| package org.onlab.onos.sdnip; |
| |
| import java.util.HashSet; |
| import java.util.Random; |
| import java.util.Set; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.onlab.onos.net.ConnectPoint; |
| import org.onlab.onos.net.DefaultHost; |
| import org.onlab.onos.net.DeviceId; |
| import org.onlab.onos.net.Host; |
| import org.onlab.onos.net.HostId; |
| import org.onlab.onos.net.HostLocation; |
| import org.onlab.onos.net.host.HostEvent; |
| import org.onlab.onos.net.host.HostListener; |
| import org.onlab.onos.net.host.HostService; |
| import org.onlab.onos.net.host.PortAddresses; |
| import org.onlab.onos.net.provider.ProviderId; |
| import org.onlab.onos.sdnip.Router.InternalHostListener; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.VlanId; |
| |
| import com.google.common.collect.Sets; |
| |
| /** |
| * Test version of the HostService which is used to simulate delays in |
| * receiving ARP replies, as you would see in a real system due to the time |
| * it takes to proxy ARP packets to/from the host. Requests are asynchronous, |
| * and replies may come back to the requestor in a different order than the |
| * requests were sent, which again you would expect to see in a real system. |
| */ |
| public class TestHostService implements HostService { |
| |
| /** |
| * The maximum possible delay before an ARP reply is received. |
| */ |
| private static final int MAX_ARP_REPLY_DELAY = 30; // milliseconds |
| |
| /** |
| * The probability that we already have the MAC address cached when the |
| * caller calls {@link #getHostsByIp(IpAddress ipAddress)}. |
| */ |
| private static final float MAC_ALREADY_KNOWN_PROBABILITY = 0.3f; |
| |
| private final ScheduledExecutorService replyTaskExecutor; |
| private final Random random; |
| |
| /** |
| * Class constructor. |
| */ |
| public TestHostService() { |
| replyTaskExecutor = Executors.newSingleThreadScheduledExecutor(); |
| random = new Random(); |
| } |
| |
| /** |
| * Task used to reply to ARP requests from a different thread. Replies |
| * usually come on a different thread in the real system, so we need to |
| * ensure we test this behavior. |
| */ |
| private class ReplyTask implements Runnable { |
| private HostListener listener; |
| private IpAddress ipAddress; |
| |
| /** |
| * Class constructor. |
| * |
| * @param listener the client who requests and waits the MAC address |
| * @param ipAddress the target IP address of the request |
| */ |
| public ReplyTask(InternalHostListener listener, |
| IpAddress ipAddress) { |
| this.listener = listener; |
| this.ipAddress = ipAddress; |
| } |
| |
| @Override |
| public void run() { |
| Host host = getHostsByIp(ipAddress).iterator().next(); |
| HostEvent hostevent = |
| new HostEvent(HostEvent.Type.HOST_ADDED, host); |
| listener.event(hostevent); |
| } |
| } |
| |
| @Override |
| public Set<Host> getHostsByIp(IpAddress ipAddress) { |
| float replyChance = random.nextFloat(); |
| |
| // We don't care what the attachment point is in the test, |
| // so for all the hosts, we use a same ConnectPoint. |
| Host host = new DefaultHost(ProviderId.NONE, HostId.NONE, |
| SdnIpTest.generateMacAddress(ipAddress), VlanId.NONE, |
| new HostLocation(SdnIpTest.SW1_ETH1, 1), |
| Sets.newHashSet(ipAddress)); |
| |
| if (replyChance < MAC_ALREADY_KNOWN_PROBABILITY) { |
| // Some percentage of the time we already know the MAC address, so |
| // we reply directly when the requestor asks for the MAC address |
| return Sets.newHashSet(host); |
| } |
| return new HashSet<Host>(); |
| } |
| |
| @Override |
| public void startMonitoringIp(IpAddress ipAddress) { |
| |
| // Randomly select an amount of time to delay the reply coming back to |
| int delay = random.nextInt(MAX_ARP_REPLY_DELAY); |
| ReplyTask replyTask = new ReplyTask( |
| (SdnIpTest.router.new InternalHostListener()), ipAddress); |
| replyTaskExecutor.schedule(replyTask, delay, TimeUnit.MILLISECONDS); |
| } |
| |
| @Override |
| public int getHostCount() { |
| return 0; |
| } |
| |
| @Override |
| public Iterable<Host> getHosts() { |
| return null; |
| } |
| |
| @Override |
| public Host getHost(HostId hostId) { |
| return null; |
| } |
| |
| @Override |
| public Set<Host> getHostsByVlan(VlanId vlanId) { |
| return null; |
| } |
| |
| @Override |
| public Set<Host> getHostsByMac(MacAddress mac) { |
| return null; |
| } |
| |
| @Override |
| public Set<Host> getConnectedHosts(ConnectPoint connectPoint) { |
| return null; |
| } |
| |
| @Override |
| public Set<Host> getConnectedHosts(DeviceId deviceId) { |
| return null; |
| } |
| |
| @Override |
| public void stopMonitoringIp(IpAddress ip) { |
| |
| } |
| |
| @Override |
| public void requestMac(IpAddress ip) { |
| |
| } |
| |
| @Override |
| public Set<PortAddresses> getAddressBindings() { |
| return null; |
| } |
| |
| @Override |
| public Set<PortAddresses> getAddressBindingsForPort(ConnectPoint connectPoint) { |
| return null; |
| } |
| |
| @Override |
| public void addListener(HostListener listener) { |
| |
| } |
| |
| @Override |
| public void removeListener(HostListener listener) { |
| |
| } |
| |
| } |