| /* |
| * Copyright 2014-present 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.proxyarp; |
| |
| 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.Modified; |
| import org.apache.felix.scr.annotations.Property; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.ICMP6; |
| import org.onlab.packet.IPv6; |
| import org.onlab.util.Tools; |
| import org.onosproject.cfg.ComponentConfigService; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.packet.InboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.net.proxyarp.ProxyArpService; |
| import org.osgi.service.component.ComponentContext; |
| import org.slf4j.Logger; |
| |
| import java.util.Dictionary; |
| |
| import static org.onlab.packet.Ethernet.TYPE_ARP; |
| import static org.onlab.packet.Ethernet.TYPE_IPV6; |
| import static org.onlab.packet.ICMP6.NEIGHBOR_ADVERTISEMENT; |
| import static org.onlab.packet.ICMP6.NEIGHBOR_SOLICITATION; |
| import static org.onlab.packet.IPv6.PROTOCOL_ICMP6; |
| import static org.onosproject.net.packet.PacketPriority.CONTROL; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Sample reactive proxy arp application. |
| * |
| * @deprecated in Hummingbird release |
| */ |
| @Deprecated |
| @Component(enabled = false) |
| public class ProxyArp { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ProxyArpService proxyArpService; |
| |
| private ProxyArpProcessor processor = new ProxyArpProcessor(); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ComponentConfigService cfgService; |
| |
| private ApplicationId appId; |
| |
| @Property(name = "ipv6NeighborDiscovery", boolValue = false, |
| label = "Enable IPv6 Neighbor Discovery; default is false") |
| protected boolean ipv6NeighborDiscovery = false; |
| |
| @Activate |
| public void activate(ComponentContext context) { |
| cfgService.registerProperties(getClass()); |
| appId = coreService.registerApplication("org.onosproject.proxyarp"); |
| |
| packetService.addProcessor(processor, PacketProcessor.director(1)); |
| readComponentConfiguration(context); |
| requestPackets(); |
| |
| log.info("Started with Application ID {}", appId.id()); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| cfgService.unregisterProperties(getClass(), false); |
| withdrawIntercepts(); |
| packetService.removeProcessor(processor); |
| processor = null; |
| log.info("Stopped"); |
| } |
| |
| @Modified |
| public void modified(ComponentContext context) { |
| readComponentConfiguration(context); |
| requestPackets(); |
| } |
| |
| /** |
| * Request packet in via PacketService. |
| */ |
| private void requestPackets() { |
| TrafficSelector.Builder selectorBuilder = |
| DefaultTrafficSelector.builder(); |
| selectorBuilder.matchEthType(TYPE_ARP); |
| packetService.requestPackets(selectorBuilder.build(), |
| CONTROL, appId); |
| |
| selectorBuilder = DefaultTrafficSelector.builder(); |
| selectorBuilder.matchEthType(TYPE_IPV6); |
| selectorBuilder.matchIPProtocol(PROTOCOL_ICMP6); |
| selectorBuilder.matchIcmpv6Type(NEIGHBOR_SOLICITATION); |
| if (ipv6NeighborDiscovery) { |
| // IPv6 Neighbor Solicitation packet. |
| packetService.requestPackets(selectorBuilder.build(), |
| CONTROL, appId); |
| } else { |
| packetService.cancelPackets(selectorBuilder.build(), |
| CONTROL, appId); |
| } |
| |
| // IPv6 Neighbor Advertisement packet. |
| selectorBuilder = DefaultTrafficSelector.builder(); |
| selectorBuilder.matchEthType(TYPE_IPV6); |
| selectorBuilder.matchIPProtocol(PROTOCOL_ICMP6); |
| selectorBuilder.matchIcmpv6Type(NEIGHBOR_ADVERTISEMENT); |
| if (ipv6NeighborDiscovery) { |
| packetService.requestPackets(selectorBuilder.build(), |
| CONTROL, appId); |
| } else { |
| packetService.cancelPackets(selectorBuilder.build(), |
| CONTROL, appId); |
| } |
| |
| |
| } |
| |
| /** |
| * Cancel requested packet in via packet service. |
| */ |
| private void withdrawIntercepts() { |
| TrafficSelector.Builder selectorBuilder = |
| DefaultTrafficSelector.builder(); |
| selectorBuilder.matchEthType(TYPE_ARP); |
| packetService.cancelPackets(selectorBuilder.build(), CONTROL, appId); |
| selectorBuilder = DefaultTrafficSelector.builder(); |
| selectorBuilder.matchEthType(TYPE_IPV6); |
| selectorBuilder.matchIPProtocol(PROTOCOL_ICMP6); |
| selectorBuilder.matchIcmpv6Type(NEIGHBOR_SOLICITATION); |
| packetService.cancelPackets(selectorBuilder.build(), CONTROL, appId); |
| selectorBuilder = DefaultTrafficSelector.builder(); |
| selectorBuilder.matchEthType(TYPE_IPV6); |
| selectorBuilder.matchIPProtocol(PROTOCOL_ICMP6); |
| selectorBuilder.matchIcmpv6Type(NEIGHBOR_ADVERTISEMENT); |
| packetService.cancelPackets(selectorBuilder.build(), CONTROL, appId); |
| |
| } |
| |
| /** |
| * Extracts properties from the component configuration context. |
| * |
| * @param context the component context |
| */ |
| private void readComponentConfiguration(ComponentContext context) { |
| Dictionary<?, ?> properties = context.getProperties(); |
| Boolean flag; |
| |
| flag = Tools.isPropertyEnabled(properties, "ipv6NeighborDiscovery"); |
| if (flag == null) { |
| log.info("IPv6 Neighbor Discovery is not configured, " + |
| "using current value of {}", ipv6NeighborDiscovery); |
| } else { |
| ipv6NeighborDiscovery = flag; |
| log.info("Configured. IPv6 Neighbor Discovery is {}", |
| ipv6NeighborDiscovery ? "enabled" : "disabled"); |
| } |
| } |
| |
| /** |
| * Packet processor responsible for forwarding packets along their paths. |
| */ |
| private class ProxyArpProcessor implements PacketProcessor { |
| |
| @Override |
| public void process(PacketContext context) { |
| // Stop processing if the packet has been handled, since we |
| // can't do any more to it. |
| if (context.isHandled()) { |
| return; |
| } |
| |
| InboundPacket pkt = context.inPacket(); |
| Ethernet ethPkt = pkt.parsed(); |
| if (ethPkt == null) { |
| return; |
| } |
| |
| if (ethPkt.getEtherType() == TYPE_ARP) { |
| //handle the arp packet. |
| proxyArpService.handlePacket(context); |
| } else if (ipv6NeighborDiscovery && ethPkt.getEtherType() == TYPE_IPV6) { |
| IPv6 ipv6Pkt = (IPv6) ethPkt.getPayload(); |
| if (ipv6Pkt.getNextHeader() == IPv6.PROTOCOL_ICMP6) { |
| ICMP6 icmp6Pkt = (ICMP6) ipv6Pkt.getPayload(); |
| if (icmp6Pkt.getIcmpType() == NEIGHBOR_SOLICITATION || |
| icmp6Pkt.getIcmpType() == NEIGHBOR_ADVERTISEMENT) { |
| // handle ICMPv6 solicitations and advertisements |
| proxyArpService.handlePacket(context); |
| } |
| } |
| } |
| |
| // FIXME why were we listening to IPv4 frames at all? |
| // Do not ARP for multicast packets. Let mfwd handle them. |
| if (ethPkt.getEtherType() == Ethernet.TYPE_IPV4) { |
| if (ethPkt.getDestinationMAC().isMulticast()) { |
| return; |
| } |
| } |
| } |
| } |
| } |