SoftRouterPipeline.java 15.9 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432
/*
 * Copyright 2015 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.driver.pipeline;

import org.onlab.osgi.ServiceDirectory;
import org.onlab.packet.Ethernet;
import org.onlab.packet.VlanId;
import org.onlab.util.KryoNamespace;
import org.onosproject.core.ApplicationId;
import org.onosproject.core.CoreService;
import org.onosproject.net.DeviceId;
import org.onosproject.net.behaviour.NextGroup;
import org.onosproject.net.behaviour.Pipeliner;
import org.onosproject.net.behaviour.PipelinerContext;
import org.onosproject.net.driver.AbstractHandlerBehaviour;
import org.onosproject.net.flow.DefaultFlowRule;
import org.onosproject.net.flow.DefaultTrafficSelector;
import org.onosproject.net.flow.DefaultTrafficTreatment;
import org.onosproject.net.flow.FlowRule;
import org.onosproject.net.flow.FlowRuleOperations;
import org.onosproject.net.flow.FlowRuleOperationsContext;
import org.onosproject.net.flow.FlowRuleService;
import org.onosproject.net.flow.TrafficSelector;
import org.onosproject.net.flow.TrafficTreatment;
import org.onosproject.net.flow.criteria.Criteria;
import org.onosproject.net.flow.criteria.Criterion;
import org.onosproject.net.flow.criteria.EthCriterion;
import org.onosproject.net.flow.criteria.EthTypeCriterion;
import org.onosproject.net.flow.criteria.IPCriterion;
import org.onosproject.net.flow.criteria.PortCriterion;
import org.onosproject.net.flow.criteria.VlanIdCriterion;
import org.onosproject.net.flowobjective.FilteringObjective;
import org.onosproject.net.flowobjective.FlowObjectiveStore;
import org.onosproject.net.flowobjective.ForwardingObjective;
import org.onosproject.net.flowobjective.NextObjective;
import org.onosproject.net.flowobjective.Objective;
import org.onosproject.net.flowobjective.ObjectiveError;
import org.onosproject.store.serializers.KryoNamespaces;
import org.slf4j.Logger;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;

import static org.slf4j.LoggerFactory.getLogger;

/**
 *  Simple 2-Table Pipeline for Software/NPU based routers. This pipeline
 *  does not forward IP traffic to next-hop groups. Instead it forwards traffic
 *  using OF FlowMod actions.
 */
public class SoftRouterPipeline extends AbstractHandlerBehaviour implements Pipeliner {

    protected static final int FILTER_TABLE = 0;
    protected static final int FIB_TABLE = 1;

    private static final int DROP_PRIORITY = 0;
    private static final int DEFAULT_PRIORITY = 0x8000;
    private static final int HIGHEST_PRIORITY = 0xffff;

    private ServiceDirectory serviceDirectory;
    protected FlowRuleService flowRuleService;
    private CoreService coreService;
    private FlowObjectiveStore flowObjectiveStore;
    protected DeviceId deviceId;
    protected ApplicationId appId;
    private ApplicationId driverId;

    private KryoNamespace appKryo = new KryoNamespace.Builder()
        .register(DummyGroup.class)
        .register(KryoNamespaces.API)
        .register(byte[].class)
        .build();

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

    @Override
    public void init(DeviceId deviceId, PipelinerContext context) {
        this.serviceDirectory = context.directory();
        this.deviceId = deviceId;
        coreService = serviceDirectory.get(CoreService.class);
        flowRuleService = serviceDirectory.get(FlowRuleService.class);
        flowObjectiveStore = context.store();
        driverId = coreService.registerApplication(
                "org.onosproject.driver.SoftRouterPipeline");

        initializePipeline();
    }

    @Override
    public void filter(FilteringObjective filteringObjective) {
        if (filteringObjective.type() == FilteringObjective.Type.PERMIT) {
            processFilter(filteringObjective,
                          filteringObjective.op() == Objective.Operation.ADD,
                          filteringObjective.appId());
        } else {
            fail(filteringObjective, ObjectiveError.UNSUPPORTED);
        }
    }

    @Override
    public void forward(ForwardingObjective fwd) {
        Collection<FlowRule> rules;
        FlowRuleOperations.Builder flowOpsBuilder = FlowRuleOperations.builder();

        rules = processForward(fwd);
        switch (fwd.op()) {
            case ADD:
                rules.stream()
                        .filter(rule -> rule != null)
                        .forEach(flowOpsBuilder::add);
                break;
            case REMOVE:
                rules.stream()
                        .filter(rule -> rule != null)
                        .forEach(flowOpsBuilder::remove);
                break;
            default:
                fail(fwd, ObjectiveError.UNKNOWN);
                log.warn("Unknown forwarding type {}", fwd.op());
        }


        flowRuleService.apply(flowOpsBuilder.build(new FlowRuleOperationsContext() {
            @Override
            public void onSuccess(FlowRuleOperations ops) {
                pass(fwd);
            }

            @Override
            public void onError(FlowRuleOperations ops) {
                fail(fwd, ObjectiveError.FLOWINSTALLATIONFAILED);
            }
        }));

    }

    @Override
    public void next(NextObjective nextObjective) {
        switch (nextObjective.type()) {
        case SIMPLE:
            Collection<TrafficTreatment> treatments = nextObjective.next();
            if (treatments.size() != 1) {
                log.error("Next Objectives of type Simple should only have a "
                        + "single Traffic Treatment. Next Objective Id:{}", nextObjective.id());
               fail(nextObjective, ObjectiveError.BADPARAMS);
               return;
            }
            processSimpleNextObjective(nextObjective);
            break;
        case HASHED:
        case BROADCAST:
        case FAILOVER:
            fail(nextObjective, ObjectiveError.UNSUPPORTED);
            log.warn("Unsupported next objective type {}", nextObjective.type());
            break;
        default:
            fail(nextObjective, ObjectiveError.UNKNOWN);
            log.warn("Unknown next objective type {}", nextObjective.type());
        }
    }

    private void pass(Objective obj) {
        if (obj.context().isPresent()) {
            obj.context().get().onSuccess(obj);
        }
    }

    private void fail(Objective obj, ObjectiveError error) {
        if (obj.context().isPresent()) {
            obj.context().get().onError(obj, error);
        }
    }

    private void initializePipeline() {
        //Drop rules for both tables
        TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
        TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
        FlowRuleOperations.Builder ops = FlowRuleOperations.builder();

        treatment.drop();

        FlowRule rule = DefaultFlowRule.builder()
                .forDevice(deviceId)
                .withSelector(selector.build())
                .withTreatment(treatment.build())
                .withPriority(DROP_PRIORITY)
                .fromApp(driverId)
                .makePermanent()
                .forTable(FILTER_TABLE)
                .build();
        ops = ops.add(rule);

        rule = DefaultFlowRule.builder().forDevice(deviceId)
                .withSelector(selector.build())
                .withTreatment(treatment.build())
                .withPriority(DROP_PRIORITY)
                .fromApp(driverId)
                .makePermanent()
                .forTable(FIB_TABLE)
                .build();
        ops = ops.add(rule);

        flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
            @Override
            public void onSuccess(FlowRuleOperations ops) {
                log.info("Provisioned drop rules in both tables");
            }

            @Override
            public void onError(FlowRuleOperations ops) {
                log.info("Failed to provision drop rules");
            }
        }));
    }

    private void processFilter(FilteringObjective filt, boolean install,
                               ApplicationId applicationId) {
        // This driver only processes filtering criteria defined with switch
        // ports as the key
        PortCriterion p;
        EthCriterion e = null;
        VlanIdCriterion v = null;

        if (!filt.key().equals(Criteria.dummy()) &&
                filt.key().type() == Criterion.Type.IN_PORT) {
            p = (PortCriterion) filt.key();
        } else {
            log.warn("No key defined in filtering objective from app: {}. Not"
                    + "processing filtering objective", applicationId);
            fail(filt, ObjectiveError.UNKNOWN);
            return;
        }

        // convert filtering conditions for switch-intfs into flowrules
        FlowRuleOperations.Builder ops = FlowRuleOperations.builder();
        for (Criterion c : filt.conditions()) {
            if (c.type() == Criterion.Type.ETH_DST) {
                e = (EthCriterion) c;
            } else if (c.type() == Criterion.Type.VLAN_VID) {
                v = (VlanIdCriterion) c;
            } else {
                log.error("Unsupported filter {}", c);
                fail(filt, ObjectiveError.UNSUPPORTED);
                return;
            }
        }

        log.debug("adding Port/VLAN/MAC filtering rules in filter table: {}/{}/{}",
                  p.port(), v.vlanId(), e.mac());
        TrafficSelector.Builder selector = DefaultTrafficSelector.builder();
        TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder();
        selector.matchInPort(p.port());

        selector.matchEthDst(e.mac());
        selector.matchVlanId(v.vlanId());
        selector.matchEthType(Ethernet.TYPE_IPV4);
        if (!v.vlanId().equals(VlanId.NONE)) {
            treatment.popVlan();
        }
        treatment.transition(FIB_TABLE);
        FlowRule rule = DefaultFlowRule.builder()
                .forDevice(deviceId)
                .withSelector(selector.build())
                .withTreatment(treatment.build())
                .withPriority(DEFAULT_PRIORITY)
                .fromApp(applicationId)
                .makePermanent()
                .forTable(FILTER_TABLE).build();
        ops =  ops.add(rule);

        ops = install ? ops.add(rule) : ops.remove(rule);
        // apply filtering flow rules
        flowRuleService.apply(ops.build(new FlowRuleOperationsContext() {
            @Override
            public void onSuccess(FlowRuleOperations ops) {
                log.info("Applied filtering rules");
                pass(filt);
            }

            @Override
            public void onError(FlowRuleOperations ops) {
                log.info("Failed to apply filtering rules");
                fail(filt, ObjectiveError.FLOWINSTALLATIONFAILED);
            }
        }));
    }

    private Collection<FlowRule> processForward(ForwardingObjective fwd) {
        switch (fwd.flag()) {
        case SPECIFIC:
            return processSpecific(fwd);
        case VERSATILE:
            return processVersatile(fwd);
        default:
            fail(fwd, ObjectiveError.UNKNOWN);
            log.warn("Unknown forwarding flag {}", fwd.flag());
        }
        return Collections.emptySet();
    }

    /**
     * SoftRouter has a single versatile table - the filter table. All versatile
     * flow rules must include the filtering rules.
     *
     * @param fwd The forwarding objective of type versatile
     * @return  A collection of flow rules meant to be delivered to the flowrule
     *          subsystem. May return empty collection in case of failures.
     */
    private Collection<FlowRule> processVersatile(ForwardingObjective fwd) {
        Collection<FlowRule> flowrules = new ArrayList<>();

        FlowRule rule = DefaultFlowRule.builder()
                .withSelector(fwd.selector())
                .withTreatment(fwd.treatment())
                .makePermanent()
                .forDevice(deviceId)
                .fromApp(fwd.appId())
                .withPriority(fwd.priority())
                .build();

        flowrules.add(rule);

        return flowrules;
    }

    /**
     * SoftRouter has a single specific table - the FIB Table. It emulates
     * LPM matching of dstIP by using higher priority flows for longer prefixes.
     * Flows are forwarded using flow-actions
     *
     * @param fwd The forwarding objective of type simple
     * @return A collection of flow rules meant to be delivered to the flowrule
     *         subsystem. Typically the returned collection has a single flowrule.
     *         May return empty collection in case of failures.
     *
     */
    private Collection<FlowRule> processSpecific(ForwardingObjective fwd) {
        log.debug("Processing specific forwarding objective");
        TrafficSelector selector = fwd.selector();
        EthTypeCriterion ethType =
                (EthTypeCriterion) selector.getCriterion(Criterion.Type.ETH_TYPE);
        // XXX currently supporting only the L3 unicast table
        if (ethType == null || ethType.ethType().toShort() != Ethernet.TYPE_IPV4) {
            fail(fwd, ObjectiveError.UNSUPPORTED);
            return Collections.emptySet();
        }

        TrafficSelector filteredSelector =
                DefaultTrafficSelector.builder()
                        .matchEthType(Ethernet.TYPE_IPV4)
                        .matchIPDst(((IPCriterion)
                                selector.getCriterion(Criterion.Type.IPV4_DST)).ip())
                        .build();

        TrafficTreatment tt = null;
        if (fwd.nextId() != null) {
            NextGroup next = flowObjectiveStore.getNextGroup(fwd.nextId());
            if (next == null) {
                log.error("next-id {} does not exist in store", fwd.nextId());
                return Collections.emptySet();
            }
            tt = appKryo.deserialize(next.data());
            if (tt == null)  {
                log.error("Error in deserializing next-id {}", fwd.nextId());
                return Collections.emptySet();
            }
        }

        FlowRule.Builder ruleBuilder = DefaultFlowRule.builder()
                .fromApp(fwd.appId())
                .withPriority(fwd.priority())
                .forDevice(deviceId)
                .withSelector(filteredSelector);

        if (tt != null) {
            ruleBuilder.withTreatment(tt);
        }

        if (fwd.permanent()) {
            ruleBuilder.makePermanent();
        } else {
            ruleBuilder.makeTemporary(fwd.timeout());
        }

        ruleBuilder.forTable(FIB_TABLE);
        return Collections.singletonList(ruleBuilder.build());
    }

    /**
     * Next Objectives are stored as dummy groups for retrieval later
     * when Forwarding Objectives reference the next objective id. At that point
     * the dummy group is fetched from the distributed store and the enclosed
     * treatment is applied as a flow rule action.
     *
     * @param nextObj the next objective of type simple
     */
    private void processSimpleNextObjective(NextObjective nextObj) {
        // Simple next objective has a single treatment (not a collection)
        TrafficTreatment treatment = nextObj.next().iterator().next();
        flowObjectiveStore.putNextGroup(nextObj.id(),
                                        new DummyGroup(treatment));
    }

    private class DummyGroup implements NextGroup {
        TrafficTreatment nextActions;

        public DummyGroup(TrafficTreatment next) {
            this.nextActions = next;
        }

        @Override
        public byte[] data() {
            return appKryo.serialize(nextActions);
        }

    }

}