sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [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.openstackswitching; |
| 17 | |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame^] | 18 | import org.onlab.packet.ARP; |
| 19 | import org.onlab.packet.Ethernet; |
| 20 | import org.onlab.packet.Ip4Address; |
| 21 | import org.onlab.packet.MacAddress; |
| 22 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 23 | import org.onosproject.net.flow.TrafficTreatment; |
| 24 | import org.onosproject.net.packet.DefaultOutboundPacket; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 25 | import org.onosproject.net.packet.InboundPacket; |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame^] | 26 | import org.onosproject.net.packet.OutboundPacket; |
| 27 | import org.onosproject.net.packet.PacketService; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 28 | import org.slf4j.Logger; |
| 29 | import org.slf4j.LoggerFactory; |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame^] | 30 | import java.nio.ByteBuffer; |
| 31 | import java.util.Map; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 32 | |
| 33 | /** |
| 34 | * It handles ARP packet from VMs. |
| 35 | */ |
| 36 | public class OpenstackArpHandler { |
| 37 | |
| 38 | private static Logger log = LoggerFactory |
| 39 | .getLogger(OpenstackArpHandler.class); |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame^] | 40 | private PacketService packetService; |
| 41 | private Map<String, OpenstackPort> openstackPortMap; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 42 | |
| 43 | /** |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame^] | 44 | * Returns OpenstackArpHandler reference. |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 45 | * |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame^] | 46 | * @param openstackPortMap |
| 47 | * @param packetService |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 48 | */ |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame^] | 49 | public OpenstackArpHandler(Map<String, OpenstackPort> openstackPortMap, PacketService packetService) { |
| 50 | this.openstackPortMap = openstackPortMap; |
| 51 | this.packetService = packetService; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Processes ARP packets. |
| 56 | * |
| 57 | * @param pkt ARP request packet |
| 58 | */ |
| 59 | public void processPacketIn(InboundPacket pkt) { |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame^] | 60 | Ethernet ethernet = pkt.parsed(); |
| 61 | ARP arp = (ARP) ethernet.getPayload(); |
| 62 | |
| 63 | if (arp.getOpCode() == ARP.OP_REQUEST) { |
| 64 | byte[] srcMacAddress = arp.getSenderHardwareAddress(); |
| 65 | byte[] srcIPAddress = arp.getSenderProtocolAddress(); |
| 66 | byte[] dstIPAddress = arp.getTargetProtocolAddress(); |
| 67 | |
| 68 | //Searches the Dst MAC Address based on openstackPortMap |
| 69 | MacAddress macAddress = null; |
| 70 | |
| 71 | OpenstackPort openstackPort = openstackPortMap.values().stream().filter(e -> e.fixedIps(). |
| 72 | containsValue(Ip4Address.valueOf(dstIPAddress))).findAny().orElse(null); |
| 73 | |
| 74 | if (openstackPort != null) { |
| 75 | macAddress = openstackPort.macAddress(); |
| 76 | log.debug("Found MACAddress: {}", macAddress.toString()); |
| 77 | } else { |
| 78 | return; |
| 79 | } |
| 80 | |
| 81 | //Creates a response packet |
| 82 | ARP arpReply = new ARP(); |
| 83 | arpReply.setOpCode(ARP.OP_REPLY) |
| 84 | .setHardwareAddressLength(arp.getHardwareAddressLength()) |
| 85 | .setHardwareType(arp.getHardwareType()) |
| 86 | .setProtocolAddressLength(arp.getProtocolAddressLength()) |
| 87 | .setProtocolType(arp.getProtocolType()) |
| 88 | .setSenderHardwareAddress(macAddress.toBytes()) |
| 89 | .setSenderProtocolAddress(dstIPAddress) |
| 90 | .setTargetHardwareAddress(srcMacAddress) |
| 91 | .setTargetProtocolAddress(srcIPAddress); |
| 92 | |
| 93 | //Sends a response packet |
| 94 | ethernet.setDestinationMACAddress(srcMacAddress) |
| 95 | .setSourceMACAddress(macAddress) |
| 96 | .setEtherType(Ethernet.TYPE_ARP) |
| 97 | .setPayload(arpReply); |
| 98 | |
| 99 | TrafficTreatment.Builder builder = DefaultTrafficTreatment.builder(); |
| 100 | builder.setOutput(pkt.receivedFrom().port()); |
| 101 | OutboundPacket packet = new DefaultOutboundPacket(pkt.receivedFrom().deviceId(), |
| 102 | builder.build(), ByteBuffer.wrap(ethernet.serialize())); |
| 103 | packetService.emit(packet); |
| 104 | } |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 105 | } |
| 106 | } |