| /* |
| * Copyright 2017-present Open Networking Foundation |
| * |
| * 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.p4runtime; |
| |
| import org.onlab.packet.EthType; |
| import org.onosproject.net.flow.instructions.Instructions; |
| import org.onosproject.net.packet.OutboundPacket; |
| import org.onosproject.net.packet.PacketProgrammable; |
| import org.onosproject.net.pi.model.PiPipelineInterpreter; |
| |
| import java.nio.ByteBuffer; |
| import java.util.stream.Collectors; |
| |
| import static org.onosproject.drivers.p4runtime.P4RuntimeDriverUtils.getInterpreter; |
| import static org.onosproject.net.flow.instructions.Instruction.Type.OUTPUT; |
| |
| /** |
| * Implementation of PacketProgrammable behaviour for P4Runtime. |
| */ |
| public class P4RuntimePacketProgrammable |
| extends AbstractP4RuntimeHandlerBehaviour |
| implements PacketProgrammable { |
| |
| @Override |
| public void emit(OutboundPacket packet) { |
| |
| if (!this.setupBehaviour("emit()")) { |
| return; |
| } |
| |
| final PiPipelineInterpreter interpreter = getInterpreter(handler()); |
| if (interpreter == null) { |
| // Error logged by getInterpreter(). |
| return; |
| } |
| |
| if (log.isTraceEnabled()) { |
| logPacketOut(packet); |
| } |
| |
| try { |
| interpreter.mapOutboundPacket(packet).forEach( |
| op -> client.packetOut(p4DeviceId, op, pipeconf)); |
| } catch (PiPipelineInterpreter.PiInterpreterException e) { |
| log.error("Unable to translate outbound packet for {} with pipeconf {}: {}", |
| deviceId, pipeconf.id(), e.getMessage()); |
| } |
| } |
| |
| private void logPacketOut(OutboundPacket packet) { |
| final EthType.EtherType etherType = getEtherType(packet.data()); |
| final String outPorts = packet.treatment().immediate().stream() |
| .filter(i -> i.type().equals(OUTPUT)) |
| .map(i -> Long.toString(((Instructions.OutputInstruction) i).port().toLong())) |
| .collect(Collectors.joining(",")); |
| final String desc = outPorts.isBlank() |
| ? "treatment=" + packet.treatment().toString() |
| : "egress_ports=" + outPorts; |
| log.trace("Sending PACKET-OUT >>> device={} {} eth_type={}", |
| packet.sendThrough(), desc, |
| etherType.ethType().toString()); |
| } |
| |
| private EthType.EtherType getEtherType(ByteBuffer data) { |
| final short shortEthType = data.getShort(12); |
| data.rewind(); |
| return EthType.EtherType.lookup(shortEthType); |
| } |
| } |