| /* |
| * Copyright 2016-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.drivers.bmv2.translators; |
| |
| import com.eclipsesource.json.Json; |
| import com.eclipsesource.json.JsonObject; |
| import com.google.common.annotations.Beta; |
| import com.google.common.collect.Maps; |
| import org.onlab.util.ImmutableByteSequence; |
| import org.onosproject.bmv2.api.model.Bmv2Model; |
| import org.onosproject.bmv2.api.runtime.Bmv2Action; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.flow.criteria.Criterion; |
| import org.onosproject.net.flow.instructions.Instruction; |
| import org.onosproject.net.flow.instructions.Instructions; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.util.Map; |
| |
| /** |
| * Implementation of a Bmv2 flow rule translator configuration for the |
| * simple_pipeline.p4 model. |
| */ |
| @Beta |
| public class Bmv2SimplePipelineTranslatorConfig implements Bmv2FlowRuleTranslator.TranslatorConfig { |
| |
| private static final String JSON_CONFIG_PATH = "/simple_pipeline.json"; |
| private final Map<String, Criterion.Type> fieldMap = Maps.newHashMap(); |
| private final Bmv2Model model; |
| |
| /** |
| * Creates a new simple pipeline translator configuration. |
| */ |
| public Bmv2SimplePipelineTranslatorConfig() { |
| |
| this.model = getModel(); |
| |
| // populate fieldMap |
| fieldMap.put("standard_metadata.ingress_port", Criterion.Type.IN_PORT); |
| fieldMap.put("ethernet.dstAddr", Criterion.Type.ETH_DST); |
| fieldMap.put("ethernet.srcAddr", Criterion.Type.ETH_SRC); |
| fieldMap.put("ethernet.etherType", Criterion.Type.ETH_TYPE); |
| } |
| |
| private static Bmv2Action buildDropAction() { |
| return Bmv2Action.builder() |
| .withName("_drop") |
| .build(); |
| } |
| |
| private static Bmv2Action buildFwdAction(Instructions.OutputInstruction inst) |
| throws Bmv2FlowRuleTranslatorException { |
| |
| Bmv2Action.Builder actionBuilder = Bmv2Action.builder(); |
| |
| actionBuilder.withName("fwd"); |
| |
| if (inst.port().isLogical()) { |
| throw new Bmv2FlowRuleTranslatorException( |
| "Output logic port numbers not supported: " + inst); |
| } |
| |
| actionBuilder.addParameter( |
| ImmutableByteSequence.copyFrom((short) inst.port().toLong())); |
| |
| return actionBuilder.build(); |
| } |
| |
| private static Bmv2Model getModel() { |
| InputStream inputStream = Bmv2SimplePipelineTranslatorConfig.class |
| .getResourceAsStream(JSON_CONFIG_PATH); |
| InputStreamReader reader = new InputStreamReader(inputStream); |
| BufferedReader bufReader = new BufferedReader(reader); |
| JsonObject json = null; |
| try { |
| json = Json.parse(bufReader).asObject(); |
| } catch (IOException e) { |
| throw new RuntimeException("Unable to parse JSON file: " + e.getMessage()); |
| } |
| |
| return Bmv2Model.parse(json); |
| } |
| |
| @Override |
| public Bmv2Model model() { |
| return this.model; |
| } |
| |
| @Override |
| public Map<String, Criterion.Type> fieldToCriterionTypeMap() { |
| return fieldMap; |
| } |
| |
| @Override |
| public Bmv2Action buildAction(TrafficTreatment treatment) |
| throws Bmv2FlowRuleTranslatorException { |
| |
| |
| if (treatment.allInstructions().size() == 0) { |
| // no instructions means drop |
| return buildDropAction(); |
| } else if (treatment.allInstructions().size() > 1) { |
| // otherwise, we understand treatments with only 1 instruction |
| throw new Bmv2FlowRuleTranslatorException( |
| "Treatment not supported, more than 1 instructions found: " |
| + treatment.toString()); |
| } |
| |
| Instruction instruction = treatment.allInstructions().get(0); |
| |
| switch (instruction.type()) { |
| case OUTPUT: |
| return buildFwdAction((Instructions.OutputInstruction) instruction); |
| case NOACTION: |
| return buildDropAction(); |
| default: |
| throw new Bmv2FlowRuleTranslatorException( |
| "Instruction type not supported: " |
| + instruction.type().name()); |
| } |
| } |
| } |