Andreas Papazois | a9964ea | 2016-01-08 15:58:22 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014-2015 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 | |
| 17 | package org.onosproject.sdxl3; |
| 18 | |
| 19 | import com.google.common.collect.ImmutableList; |
| 20 | import org.apache.felix.scr.annotations.Activate; |
| 21 | import org.apache.felix.scr.annotations.Component; |
| 22 | import org.apache.felix.scr.annotations.Deactivate; |
| 23 | import org.apache.felix.scr.annotations.Reference; |
| 24 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 25 | import org.onlab.packet.Ethernet; |
| 26 | import org.onlab.packet.IpAddress; |
| 27 | import org.onlab.packet.IpPrefix; |
| 28 | import org.onlab.packet.MacAddress; |
| 29 | import org.onlab.packet.VlanId; |
| 30 | import org.onosproject.core.ApplicationId; |
| 31 | import org.onosproject.core.CoreService; |
| 32 | import org.onosproject.incubator.net.intf.Interface; |
| 33 | import org.onosproject.incubator.net.intf.InterfaceService; |
| 34 | import org.onosproject.net.ConnectPoint; |
| 35 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 36 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 37 | import org.onosproject.net.flow.TrafficSelector; |
| 38 | import org.onosproject.net.flow.TrafficTreatment; |
| 39 | import org.onosproject.net.intent.Constraint; |
| 40 | import org.onosproject.net.intent.Key; |
| 41 | import org.onosproject.net.intent.MultiPointToSinglePointIntent; |
| 42 | import org.onosproject.net.intent.constraint.PartialFailureConstraint; |
| 43 | import org.onosproject.routing.FibListener; |
| 44 | import org.onosproject.routing.FibUpdate; |
| 45 | import org.onosproject.routing.IntentSynchronizationService; |
| 46 | import org.onosproject.routing.RoutingService; |
| 47 | import org.slf4j.Logger; |
| 48 | import org.slf4j.LoggerFactory; |
| 49 | |
| 50 | import java.util.Collection; |
| 51 | import java.util.HashSet; |
| 52 | import java.util.Map; |
| 53 | import java.util.Set; |
| 54 | import java.util.concurrent.ConcurrentHashMap; |
| 55 | |
| 56 | import static com.google.common.base.Preconditions.checkArgument; |
| 57 | |
| 58 | /** |
| 59 | * FIB component of SDX-L3. |
| 60 | */ |
| 61 | @Component(immediate = true, enabled = false) |
| 62 | public class SdxL3Fib { |
| 63 | private Logger log = LoggerFactory.getLogger(getClass()); |
| 64 | |
| 65 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 66 | protected InterfaceService interfaceService; |
| 67 | |
| 68 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 69 | protected IntentSynchronizationService intentSynchronizer; |
| 70 | |
| 71 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 72 | protected CoreService coreService; |
| 73 | |
| 74 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 75 | protected RoutingService routingService; |
| 76 | |
| 77 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Andreas Papazois | c2c4501 | 2016-01-20 14:26:11 +0200 | [diff] [blame^] | 78 | protected SdxL3PeerService peerService; |
Andreas Papazois | a9964ea | 2016-01-08 15:58:22 +0200 | [diff] [blame] | 79 | |
| 80 | private final InternalFibListener fibListener = new InternalFibListener(); |
| 81 | |
| 82 | private static final int PRIORITY_OFFSET = 100; |
| 83 | private static final int PRIORITY_MULTIPLIER = 5; |
| 84 | protected static final ImmutableList<Constraint> CONSTRAINTS |
| 85 | = ImmutableList.of(new PartialFailureConstraint()); |
| 86 | |
| 87 | private final Map<IpPrefix, MultiPointToSinglePointIntent> routeIntents |
| 88 | = new ConcurrentHashMap<>(); |
| 89 | |
| 90 | private ApplicationId appId; |
| 91 | |
| 92 | @Activate |
| 93 | public void activate() { |
| 94 | appId = coreService.getAppId(SdxL3.SDX_L3_APP); |
| 95 | |
| 96 | routingService.addFibListener(fibListener); |
| 97 | routingService.start(); |
| 98 | } |
| 99 | |
| 100 | @Deactivate |
| 101 | public void deactivate() { |
| 102 | // TODO remove listener |
| 103 | routingService.stop(); |
| 104 | } |
| 105 | |
| 106 | private void update(Collection<FibUpdate> updates, Collection<FibUpdate> withdraws) { |
| 107 | int submitCount = 0, withdrawCount = 0; |
| 108 | // |
| 109 | // NOTE: Semantically, we MUST withdraw existing intents before |
| 110 | // submitting new intents. |
| 111 | // |
| 112 | synchronized (this) { |
| 113 | MultiPointToSinglePointIntent intent; |
| 114 | |
| 115 | // |
| 116 | // Prepare the Intent batch operations for the intents to withdraw |
| 117 | // |
| 118 | for (FibUpdate withdraw : withdraws) { |
| 119 | checkArgument(withdraw.type() == FibUpdate.Type.DELETE, |
| 120 | "FibUpdate with wrong type in withdraws list"); |
| 121 | |
| 122 | IpPrefix prefix = withdraw.entry().prefix(); |
| 123 | intent = routeIntents.remove(prefix); |
| 124 | if (intent == null) { |
| 125 | log.trace("SDX-L3 No intent in routeIntents to delete " + |
| 126 | "for prefix: {}", prefix); |
| 127 | continue; |
| 128 | } |
| 129 | intentSynchronizer.withdraw(intent); |
| 130 | withdrawCount++; |
| 131 | } |
| 132 | |
| 133 | // |
| 134 | // Prepare the Intent batch operations for the intents to submit |
| 135 | // |
| 136 | for (FibUpdate update : updates) { |
| 137 | checkArgument(update.type() == FibUpdate.Type.UPDATE, |
| 138 | "FibUpdate with wrong type in updates list"); |
| 139 | |
| 140 | IpPrefix prefix = update.entry().prefix(); |
| 141 | intent = generateRouteIntent(prefix, update.entry().nextHopIp(), |
| 142 | update.entry().nextHopMac()); |
| 143 | |
| 144 | if (intent == null) { |
| 145 | // This preserves the old semantics - if an intent can't be |
| 146 | // generated, we don't do anything with that prefix. But |
| 147 | // perhaps we should withdraw the old intent anyway? |
| 148 | continue; |
| 149 | } |
| 150 | |
| 151 | routeIntents.put(prefix, intent); |
| 152 | intentSynchronizer.submit(intent); |
| 153 | submitCount++; |
| 154 | } |
| 155 | |
| 156 | log.debug("SDX-L3 submitted {}/{}, withdrew = {}/{}", submitCount, |
| 157 | updates.size(), withdrawCount, withdraws.size()); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Generates a route intent for a prefix, the next hop IP address, and |
| 163 | * the next hop MAC address. |
| 164 | * <p/> |
| 165 | * This method will find the egress interface for the intent. |
| 166 | * Intent will match dst IP prefix and rewrite dst MAC address at all other |
| 167 | * border switches, then forward packets according to dst MAC address. |
| 168 | * |
| 169 | * @param prefix IP prefix of the route to add |
| 170 | * @param nextHopIpAddress IP address of the next hop |
| 171 | * @param nextHopMacAddress MAC address of the next hop |
| 172 | * @return the generated intent, or null if no intent should be submitted |
| 173 | */ |
| 174 | private MultiPointToSinglePointIntent generateRouteIntent( |
| 175 | IpPrefix prefix, |
| 176 | IpAddress nextHopIpAddress, |
| 177 | MacAddress nextHopMacAddress) { |
| 178 | |
| 179 | // Find the attachment point (egress interface) of the next hop |
Andreas Papazois | c2c4501 | 2016-01-20 14:26:11 +0200 | [diff] [blame^] | 180 | Interface egressInterface = peerService.getInterfaceForPeer(nextHopIpAddress); |
Andreas Papazois | a9964ea | 2016-01-08 15:58:22 +0200 | [diff] [blame] | 181 | |
| 182 | if (egressInterface == null) { |
| 183 | log.warn("No outgoing interface found for {}", |
| 184 | nextHopIpAddress); |
| 185 | return null; |
| 186 | } |
| 187 | |
| 188 | // Generate the intent itself |
| 189 | Set<ConnectPoint> ingressPorts = new HashSet<>(); |
| 190 | ConnectPoint egressPort = egressInterface.connectPoint(); |
| 191 | log.debug("Generating intent for prefix {}, next hop mac {}", |
| 192 | prefix, nextHopMacAddress); |
| 193 | |
| 194 | for (Interface intf : interfaceService.getInterfaces()) { |
| 195 | // TODO this should be only peering interfaces |
| 196 | if (!intf.connectPoint().equals(egressInterface.connectPoint())) { |
| 197 | ConnectPoint srcPort = intf.connectPoint(); |
| 198 | ingressPorts.add(srcPort); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | // Match the destination IP prefix at the first hop |
| 203 | TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| 204 | if (prefix.isIp4()) { |
| 205 | selector.matchEthType(Ethernet.TYPE_IPV4); |
| 206 | // if it is default route, then we do not need match destination |
| 207 | // IP address |
| 208 | if (prefix.prefixLength() != 0) { |
| 209 | selector.matchIPDst(prefix); |
| 210 | } |
| 211 | } else { |
| 212 | selector.matchEthType(Ethernet.TYPE_IPV6); |
| 213 | // if it is default route, then we do not need match destination |
| 214 | // IP address |
| 215 | if (prefix.prefixLength() != 0) { |
| 216 | selector.matchIPv6Dst(prefix); |
| 217 | } |
| 218 | |
| 219 | } |
| 220 | |
| 221 | // Rewrite the destination MAC address |
| 222 | TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder() |
| 223 | .setEthDst(nextHopMacAddress); |
| 224 | if (!egressInterface.vlan().equals(VlanId.NONE)) { |
| 225 | treatment.setVlanId(egressInterface.vlan()); |
| 226 | // If we set VLAN ID, we have to make sure a VLAN tag exists. |
| 227 | // TODO support no VLAN -> VLAN routing |
| 228 | selector.matchVlanId(VlanId.ANY); |
| 229 | } |
| 230 | |
| 231 | int priority = |
| 232 | prefix.prefixLength() * PRIORITY_MULTIPLIER + PRIORITY_OFFSET; |
| 233 | Key key = Key.of(prefix.toString(), appId); |
| 234 | return MultiPointToSinglePointIntent.builder() |
| 235 | .appId(appId) |
| 236 | .key(key) |
| 237 | .selector(selector.build()) |
| 238 | .treatment(treatment.build()) |
| 239 | .ingressPoints(ingressPorts) |
| 240 | .egressPoint(egressPort) |
| 241 | .priority(priority) |
| 242 | .constraints(CONSTRAINTS) |
| 243 | .build(); |
| 244 | } |
| 245 | |
| 246 | private class InternalFibListener implements FibListener { |
| 247 | @Override |
| 248 | public void update(Collection<FibUpdate> updates, Collection<FibUpdate> withdraws) { |
| 249 | SdxL3Fib.this.update(updates, withdraws); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | } |