Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.reactive.routing; |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 17 | |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 18 | import org.apache.felix.scr.annotations.Activate; |
| 19 | import org.apache.felix.scr.annotations.Component; |
| 20 | import org.apache.felix.scr.annotations.Deactivate; |
| 21 | import org.apache.felix.scr.annotations.Reference; |
| 22 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
Pingping Lin | c9e16bf | 2015-04-10 14:42:41 -0700 | [diff] [blame] | 23 | import org.onlab.packet.ARP; |
Jonathan Hart | 3217d1b | 2015-06-30 16:08:43 -0700 | [diff] [blame] | 24 | import org.onlab.packet.EthType; |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 25 | import org.onlab.packet.Ethernet; |
| 26 | import org.onlab.packet.IPv4; |
Pingping Lin | c9e16bf | 2015-04-10 14:42:41 -0700 | [diff] [blame] | 27 | import org.onlab.packet.Ip4Address; |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 28 | import org.onlab.packet.IpAddress; |
| 29 | import org.onlab.packet.MacAddress; |
| 30 | import org.onosproject.core.ApplicationId; |
| 31 | import org.onosproject.core.CoreService; |
| 32 | import org.onosproject.net.ConnectPoint; |
| 33 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 34 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 35 | import org.onosproject.net.flow.TrafficSelector; |
| 36 | import org.onosproject.net.flow.TrafficTreatment; |
| 37 | import org.onosproject.net.packet.DefaultOutboundPacket; |
| 38 | import org.onosproject.net.packet.InboundPacket; |
| 39 | import org.onosproject.net.packet.OutboundPacket; |
| 40 | import org.onosproject.net.packet.PacketContext; |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 41 | import org.onosproject.net.packet.PacketProcessor; |
| 42 | import org.onosproject.net.packet.PacketService; |
| 43 | import org.onosproject.routing.RoutingService; |
Pingping Lin | c9e16bf | 2015-04-10 14:42:41 -0700 | [diff] [blame] | 44 | import org.onosproject.routing.config.RoutingConfigurationService; |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 45 | import org.slf4j.Logger; |
| 46 | |
Jonathan Hart | 3217d1b | 2015-06-30 16:08:43 -0700 | [diff] [blame] | 47 | import java.nio.ByteBuffer; |
| 48 | |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 49 | import static org.onlab.packet.Ethernet.TYPE_ARP; |
| 50 | import static org.onlab.packet.Ethernet.TYPE_IPV4; |
| 51 | import static org.onosproject.net.packet.PacketPriority.REACTIVE; |
Jonathan Hart | 3217d1b | 2015-06-30 16:08:43 -0700 | [diff] [blame] | 52 | import static org.slf4j.LoggerFactory.getLogger; |
| 53 | |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 54 | /** |
| 55 | * This is reactive routing to handle 3 cases: |
| 56 | * (1) one host wants to talk to another host, both two hosts are in |
| 57 | * SDN network. |
| 58 | * (2) one host in SDN network wants to talk to another host in Internet. |
| 59 | * (3) one host from Internet wants to talk to another host in SDN network. |
| 60 | */ |
| 61 | @Component(immediate = true) |
| 62 | public class SdnIpReactiveRouting { |
| 63 | |
| 64 | private static final String APP_NAME = "org.onosproject.reactive.routing"; |
| 65 | private final Logger log = getLogger(getClass()); |
| 66 | |
| 67 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 68 | protected CoreService coreService; |
| 69 | |
| 70 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 71 | protected PacketService packetService; |
| 72 | |
| 73 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 74 | protected RoutingService routingService; |
| 75 | |
Pingping Lin | c9e16bf | 2015-04-10 14:42:41 -0700 | [diff] [blame] | 76 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 77 | protected RoutingConfigurationService config; |
| 78 | |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 79 | private ApplicationId appId; |
| 80 | |
| 81 | private ReactiveRoutingProcessor processor = |
| 82 | new ReactiveRoutingProcessor(); |
| 83 | |
| 84 | @Activate |
| 85 | public void activate() { |
| 86 | appId = coreService.registerApplication(APP_NAME); |
Brian O'Connor | 3b78326 | 2015-07-29 17:49:24 -0700 | [diff] [blame] | 87 | packetService.addProcessor(processor, PacketProcessor.director(2)); |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 88 | requestIntercepts(); |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 89 | log.info("SDN-IP Reactive Routing Started"); |
| 90 | } |
| 91 | |
| 92 | @Deactivate |
| 93 | public void deactivate() { |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 94 | withdrawIntercepts(); |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 95 | packetService.removeProcessor(processor); |
| 96 | processor = null; |
| 97 | log.info("SDN-IP Reactive Routing Stopped"); |
| 98 | } |
| 99 | |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 100 | /** |
| 101 | * Request packet in via the PacketService. |
| 102 | */ |
| 103 | private void requestIntercepts() { |
| 104 | //TODO: to support IPv6 later |
| 105 | TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| 106 | selector.matchEthType(TYPE_IPV4); |
Thomas Vachuska | c19d829 | 2015-07-06 14:11:34 -0700 | [diff] [blame] | 107 | packetService.requestPackets(selector.build(), REACTIVE, appId); |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 108 | selector.matchEthType(TYPE_ARP); |
Thomas Vachuska | c19d829 | 2015-07-06 14:11:34 -0700 | [diff] [blame] | 109 | packetService.requestPackets(selector.build(), REACTIVE, appId); |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | /** |
| 113 | * Cancel request for packet in via PacketService. |
| 114 | */ |
| 115 | private void withdrawIntercepts() { |
| 116 | TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| 117 | selector.matchEthType(TYPE_IPV4); |
Thomas Vachuska | c19d829 | 2015-07-06 14:11:34 -0700 | [diff] [blame] | 118 | packetService.cancelPackets(selector.build(), REACTIVE, appId); |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 119 | selector = DefaultTrafficSelector.builder(); |
| 120 | selector.matchEthType(TYPE_ARP); |
Thomas Vachuska | c19d829 | 2015-07-06 14:11:34 -0700 | [diff] [blame] | 121 | packetService.cancelPackets(selector.build(), REACTIVE, appId); |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 124 | private class ReactiveRoutingProcessor implements PacketProcessor { |
| 125 | @Override |
| 126 | public void process(PacketContext context) { |
| 127 | |
| 128 | InboundPacket pkt = context.inPacket(); |
| 129 | Ethernet ethPkt = pkt.parsed(); |
| 130 | if (ethPkt == null) { |
| 131 | return; |
| 132 | } |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 133 | ConnectPoint srcConnectPoint = pkt.receivedFrom(); |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 134 | |
Jonathan Hart | 3217d1b | 2015-06-30 16:08:43 -0700 | [diff] [blame] | 135 | switch (EthType.EtherType.lookup(ethPkt.getEtherType())) { |
| 136 | case ARP: |
Pingping Lin | c9e16bf | 2015-04-10 14:42:41 -0700 | [diff] [blame] | 137 | ARP arpPacket = (ARP) ethPkt.getPayload(); |
| 138 | Ip4Address targetIpAddress = Ip4Address |
| 139 | .valueOf(arpPacket.getTargetProtocolAddress()); |
| 140 | // Only when it is an ARP request packet and the target IP |
| 141 | // address is a virtual gateway IP address, then it will be |
| 142 | // processed. |
| 143 | if (arpPacket.getOpCode() == ARP.OP_REQUEST |
| 144 | && config.isVirtualGatewayIpAddress(targetIpAddress)) { |
| 145 | MacAddress gatewayMacAddress = |
| 146 | config.getVirtualGatewayMacAddress(); |
| 147 | if (gatewayMacAddress == null) { |
| 148 | break; |
| 149 | } |
| 150 | Ethernet eth = ARP.buildArpReply(targetIpAddress, |
| 151 | gatewayMacAddress, |
| 152 | ethPkt); |
| 153 | |
| 154 | TrafficTreatment.Builder builder = |
| 155 | DefaultTrafficTreatment.builder(); |
| 156 | builder.setOutput(srcConnectPoint.port()); |
| 157 | packetService.emit(new DefaultOutboundPacket( |
| 158 | srcConnectPoint.deviceId(), |
| 159 | builder.build(), |
| 160 | ByteBuffer.wrap(eth.serialize()))); |
| 161 | } |
| 162 | break; |
Jonathan Hart | 3217d1b | 2015-06-30 16:08:43 -0700 | [diff] [blame] | 163 | case IPV4: |
Pingping Lin | c9e16bf | 2015-04-10 14:42:41 -0700 | [diff] [blame] | 164 | // Parse packet |
| 165 | IPv4 ipv4Packet = (IPv4) ethPkt.getPayload(); |
| 166 | IpAddress dstIp = |
| 167 | IpAddress.valueOf(ipv4Packet.getDestinationAddress()); |
| 168 | IpAddress srcIp = |
| 169 | IpAddress.valueOf(ipv4Packet.getSourceAddress()); |
| 170 | MacAddress srcMac = ethPkt.getSourceMAC(); |
| 171 | routingService.packetReactiveProcessor(dstIp, srcIp, |
| 172 | srcConnectPoint, srcMac); |
| 173 | |
| 174 | // TODO emit packet first or packetReactiveProcessor first |
| 175 | ConnectPoint egressConnectPoint = null; |
| 176 | egressConnectPoint = routingService.getEgressConnectPoint(dstIp); |
| 177 | if (egressConnectPoint != null) { |
| 178 | forwardPacketToDst(context, egressConnectPoint); |
| 179 | } |
| 180 | break; |
| 181 | default: |
| 182 | break; |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Emits the specified packet onto the network. |
| 189 | * |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 190 | * @param context the packet context |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 191 | * @param connectPoint the connect point where the packet should be |
Aaron Kruglikov | 07a923d | 2015-07-03 13:30:57 -0700 | [diff] [blame] | 192 | * sent out |
Pingping Lin | e28ae4c | 2015-03-13 11:37:03 -0700 | [diff] [blame] | 193 | */ |
| 194 | private void forwardPacketToDst(PacketContext context, |
| 195 | ConnectPoint connectPoint) { |
| 196 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 197 | .setOutput(connectPoint.port()).build(); |
| 198 | OutboundPacket packet = |
| 199 | new DefaultOutboundPacket(connectPoint.deviceId(), treatment, |
| 200 | context.inPacket().unparsed()); |
| 201 | packetService.emit(packet); |
| 202 | log.trace("sending packet: {}", packet); |
| 203 | } |
| 204 | |
| 205 | } |
| 206 | |