Zayne Khouja | 31da33a | 2016-06-16 11:57:12 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 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.learningswitch; |
| 17 | |
| 18 | import com.google.common.collect.Maps; |
| 19 | import org.apache.felix.scr.annotations.Activate; |
| 20 | import org.apache.felix.scr.annotations.Deactivate; |
| 21 | import org.apache.felix.scr.annotations.Component; |
| 22 | import org.apache.felix.scr.annotations.Reference; |
| 23 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 24 | import org.onlab.packet.Ethernet; |
| 25 | import org.onlab.packet.MacAddress; |
| 26 | import org.onosproject.core.ApplicationId; |
| 27 | import org.onosproject.core.CoreService; |
| 28 | import org.onosproject.net.ConnectPoint; |
| 29 | import org.onosproject.net.DeviceId; |
| 30 | import org.onosproject.net.PortNumber; |
| 31 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 32 | import org.onosproject.net.flow.FlowRuleService; |
| 33 | import org.onosproject.net.packet.PacketContext; |
| 34 | import org.onosproject.net.packet.PacketPriority; |
| 35 | import org.onosproject.net.packet.PacketProcessor; |
| 36 | import org.onosproject.net.packet.PacketService; |
| 37 | import org.slf4j.Logger; |
| 38 | import org.slf4j.LoggerFactory; |
| 39 | |
| 40 | import java.util.Map; |
| 41 | import java.util.Optional; |
| 42 | |
| 43 | /** |
| 44 | * Tutorial class used to help build a basic onos learning switch application. |
| 45 | * Edit your code in the activate, deactivate, and actLikeSwitch methods. |
| 46 | */ |
| 47 | @Component(immediate = true) |
| 48 | public class LearningSwitchTutorial { |
| 49 | // Instantiates the relevant services. |
| 50 | |
| 51 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 52 | protected PacketService packetService; |
| 53 | |
| 54 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 55 | protected FlowRuleService flowRuleService; |
| 56 | |
| 57 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 58 | protected CoreService coreService; |
| 59 | |
| 60 | private final Logger log = LoggerFactory.getLogger(getClass()); |
| 61 | |
| 62 | /* |
| 63 | * Defining macTables as a concurrent map allows multiple threads and packets to |
| 64 | * use the map without an issue. |
| 65 | */ |
| 66 | protected Map<DeviceId, Map<MacAddress, PortNumber>> macTables = Maps.newConcurrentMap(); |
| 67 | private ApplicationId appId; |
| 68 | private PacketProcessor processor; |
| 69 | |
| 70 | /** |
| 71 | * Create a variable of the SwitchPacketProcessor class using the PacketProcessor defined above. |
| 72 | * Activates the app. |
| 73 | * |
| 74 | * Create code to add a processor |
| 75 | */ |
| 76 | @Activate |
| 77 | protected void activate() { |
| 78 | log.info("Started"); |
| 79 | appId = coreService.getAppId("org.onosproject.learningswitch"); //equal to the name shown in pom.xml file |
| 80 | |
| 81 | //Create and processor and add it using packetService |
| 82 | |
| 83 | /* |
| 84 | * Restricts packet types to IPV4 and ARP by only requesting those types |
| 85 | */ |
| 86 | packetService.requestPackets(DefaultTrafficSelector.builder() |
| 87 | .matchEthType(Ethernet.TYPE_IPV4).build(), PacketPriority.REACTIVE, appId, Optional.empty()); |
| 88 | packetService.requestPackets(DefaultTrafficSelector.builder() |
| 89 | .matchEthType(Ethernet.TYPE_ARP).build(), PacketPriority.REACTIVE, appId, Optional.empty()); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Deactivates the processor by removing it. |
| 94 | * |
| 95 | * Create code to remove the processor. |
| 96 | */ |
| 97 | @Deactivate |
| 98 | protected void deactivate() { |
| 99 | log.info("Stopped"); |
| 100 | |
| 101 | //Remove the processor |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * This class contains pseudo code that you must replace with your own code in actLikeSwitch. Your job is to |
| 106 | * send the packet out the port previously learned for the destination MAC. If it does not exist, |
| 107 | * flood the packet out (to all ports). |
| 108 | */ |
| 109 | private class SwitchPacketProcesser implements PacketProcessor { |
| 110 | /** |
| 111 | * Learns the source port associated with the packet's DeviceId if it has not already been learned. |
| 112 | * Calls actLikeSwitch to process and send the packet. |
| 113 | * @param pc PacketContext object containing packet info |
| 114 | */ |
| 115 | @Override |
| 116 | public void process(PacketContext pc) { |
| 117 | log.info(pc.toString()); |
| 118 | /* |
| 119 | * Puts the packet's source's device Id into the map macTables if it has not previously been added. |
| 120 | * (learns the output port) |
| 121 | */ |
| 122 | ConnectPoint cp = pc.inPacket().receivedFrom(); |
| 123 | macTables.putIfAbsent(cp.deviceId(), Maps.newConcurrentMap()); |
| 124 | |
| 125 | |
| 126 | |
| 127 | // This method simply floods all ports with the packet. |
| 128 | actLikeHub(pc); |
| 129 | |
| 130 | /* |
| 131 | * This is the call to the actLikeSwitch method you will be creating. When |
| 132 | * you are ready to test it, uncomment the line below, and comment out the |
| 133 | * actLikeHub call above. |
| 134 | * |
| 135 | * NOTE: The perk of an actLikeSwitch method over actLikeHub is speed. |
| 136 | * FlowRule allows much faster processing. |
| 137 | */ |
| 138 | //actLikeSwitch(pc); |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * Example method. Floods packet out of all switch ports. |
| 143 | * |
| 144 | * @param pc the PacketContext object passed through from activate method |
| 145 | */ |
| 146 | public void actLikeHub(PacketContext pc) { |
| 147 | pc.treatmentBuilder().setOutput(PortNumber.FLOOD); |
| 148 | pc.send(); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Ensures packet is of required type. Obtain the port number associated with the packet's source ID. |
| 153 | * If this port has previously been learned (in the process method) build a flow using the packet's |
| 154 | * out port, treatment, destination, and other properties. Send the flow to the learned out port. |
| 155 | * Otherwise, flood packet to all ports if out port has not been learned. |
| 156 | * |
| 157 | * @param pc the PacketContext object passed through from activate() method |
| 158 | */ |
| 159 | public void actLikeSwitch(PacketContext pc) { |
| 160 | |
| 161 | /* |
| 162 | * Ensures the type of packet being processed is only of type IPV4 or ARP (not LLDP or BDDP). |
| 163 | * If it is not, return and do nothing with the packet. actLikeSwitch can only process |
| 164 | * IPV4 and ARP packets. |
| 165 | */ |
| 166 | Short type = pc.inPacket().parsed().getEtherType(); |
| 167 | if (type != Ethernet.TYPE_IPV4 && type != Ethernet.TYPE_ARP) { |
| 168 | return; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * Learn the destination, source, and output port of the packet using a ConnectPoint and the |
| 173 | * associated macTable. If there is a known port associated with the packet's destination MAC Address, |
| 174 | * the output port will not be null. |
| 175 | */ |
| 176 | //find the packets connect point |
| 177 | //save the macTables port value for the deviceID |
| 178 | //save the outPort as a variable |
| 179 | //PortNumber outPort = ... |
| 180 | |
| 181 | /* |
| 182 | * If port is known, set output port to the packet's learned output port and construct a |
| 183 | * FlowRule using a source, destination, treatment and other properties. Send the FlowRule |
| 184 | * to the designated output port. |
| 185 | */ |
| 186 | //if outPort isn't null |
| 187 | //construct FlowRule |
| 188 | //FlowRule fr = ... |
| 189 | //send the packet |
| 190 | |
| 191 | /* |
| 192 | * else, the output port has not been learned yet. Flood the packet to all ports using |
| 193 | * the actLikeHub method |
| 194 | */ |
| 195 | //else |
| 196 | // call actLikeHub method |
| 197 | } |
| 198 | } |
| 199 | } |