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; |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 21 | import org.onlab.packet.IpAddress; |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 22 | import org.onlab.packet.MacAddress; |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 23 | import org.onosproject.net.Host; |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 24 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 25 | import org.onosproject.net.flow.TrafficTreatment; |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 26 | import org.onosproject.net.host.HostService; |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 27 | import org.onosproject.net.packet.DefaultOutboundPacket; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 28 | import org.onosproject.net.packet.InboundPacket; |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 29 | import org.onosproject.net.packet.PacketService; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 30 | import org.slf4j.Logger; |
| 31 | import org.slf4j.LoggerFactory; |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 32 | import java.nio.ByteBuffer; |
sanghoshin | f25d2e0 | 2015-11-11 23:07:17 +0900 | [diff] [blame] | 33 | |
| 34 | import static com.google.common.base.Preconditions.checkNotNull; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 35 | |
| 36 | /** |
sanghoshin | 46297d2 | 2015-11-03 17:51:24 +0900 | [diff] [blame] | 37 | * Handles ARP packet from VMs. |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 38 | */ |
| 39 | public class OpenstackArpHandler { |
| 40 | |
| 41 | private static Logger log = LoggerFactory |
| 42 | .getLogger(OpenstackArpHandler.class); |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 43 | private PacketService packetService; |
sanghoshin | f25d2e0 | 2015-11-11 23:07:17 +0900 | [diff] [blame] | 44 | private OpenstackRestHandler restHandler; |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 45 | private HostService hostService; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 46 | |
| 47 | /** |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 48 | * Returns OpenstackArpHandler reference. |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 49 | * |
sanghoshin | f25d2e0 | 2015-11-11 23:07:17 +0900 | [diff] [blame] | 50 | * @param restHandler rest API handler reference |
| 51 | * @param packetService PacketService reference |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 52 | * @param hostService host service |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 53 | */ |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 54 | public OpenstackArpHandler(OpenstackRestHandler restHandler, PacketService packetService, |
| 55 | HostService hostService) { |
sanghoshin | f25d2e0 | 2015-11-11 23:07:17 +0900 | [diff] [blame] | 56 | this.restHandler = checkNotNull(restHandler); |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 57 | this.packetService = packetService; |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 58 | this.hostService = hostService; |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | /** |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 62 | * Processes ARP request packets. |
| 63 | * It checks if the target IP is owned by a known host first and then ask to |
| 64 | * OpenStack if it's not. This ARP proxy does not support overlapping IP. |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 65 | * |
| 66 | * @param pkt ARP request packet |
| 67 | */ |
| 68 | public void processPacketIn(InboundPacket pkt) { |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 69 | Ethernet ethRequest = pkt.parsed(); |
| 70 | ARP arp = (ARP) ethRequest.getPayload(); |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 71 | |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 72 | if (arp.getOpCode() != ARP.OP_REQUEST) { |
| 73 | return; |
| 74 | } |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 75 | |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 76 | IpAddress targetIp = Ip4Address.valueOf(arp.getTargetProtocolAddress()); |
| 77 | MacAddress dstMac = getMacFromHostService(targetIp); |
| 78 | if (dstMac == null) { |
| 79 | dstMac = getMacFromOpenstack(targetIp); |
| 80 | } |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 81 | |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 82 | if (dstMac == null) { |
| 83 | log.debug("Failed to find MAC address for {}", targetIp.toString()); |
| 84 | return; |
| 85 | } |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 86 | |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 87 | Ethernet ethReply = ARP.buildArpReply(targetIp.getIp4Address(), |
| 88 | dstMac, |
| 89 | ethRequest); |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 90 | |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 91 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 92 | .setOutput(pkt.receivedFrom().port()) |
| 93 | .build(); |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 94 | |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 95 | packetService.emit(new DefaultOutboundPacket( |
| 96 | pkt.receivedFrom().deviceId(), |
| 97 | treatment, |
| 98 | ByteBuffer.wrap(ethReply.serialize()))); |
| 99 | } |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 100 | |
Hyunsun Moon | c98e7c5 | 2016-01-11 02:54:27 -0800 | [diff] [blame] | 101 | /** |
| 102 | * Returns MAC address of a host with a given target IP address by asking to |
| 103 | * OpenStack. It does not support overlapping IP. |
| 104 | * |
| 105 | * @param targetIp target ip address |
| 106 | * @return mac address, or null if it fails to fetch the mac |
| 107 | */ |
| 108 | private MacAddress getMacFromOpenstack(IpAddress targetIp) { |
| 109 | checkNotNull(targetIp); |
| 110 | |
| 111 | OpenstackPort openstackPort = restHandler.getPorts() |
| 112 | .stream() |
| 113 | .filter(port -> port.fixedIps().containsValue(targetIp)) |
| 114 | .findFirst() |
| 115 | .orElse(null); |
| 116 | |
| 117 | if (openstackPort != null) { |
| 118 | log.debug("Found MAC from OpenStack for {}", targetIp.toString()); |
| 119 | return openstackPort.macAddress(); |
| 120 | } else { |
| 121 | return null; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Returns MAC address of a host with a given target IP address by asking to |
| 127 | * host service. It does not support overlapping IP. |
| 128 | * |
| 129 | * @param targetIp target ip |
| 130 | * @return mac address, or null if it fails to find the mac |
| 131 | */ |
| 132 | private MacAddress getMacFromHostService(IpAddress targetIp) { |
| 133 | checkNotNull(targetIp); |
| 134 | |
| 135 | Host host = hostService.getHostsByIp(targetIp) |
| 136 | .stream() |
| 137 | .findFirst() |
| 138 | .orElse(null); |
| 139 | |
| 140 | if (host != null) { |
| 141 | log.debug("Found MAC from host service for {}", targetIp.toString()); |
| 142 | return host.mac(); |
| 143 | } else { |
| 144 | return null; |
daniel | bb83ebc | 2015-10-29 15:13:06 +0900 | [diff] [blame] | 145 | } |
sanghoshin | 94872a1 | 2015-10-16 18:04:34 +0900 | [diff] [blame] | 146 | } |
| 147 | } |