Jonathan Hart | a9e2955 | 2016-09-09 07:17:41 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016-present 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 | |
| 17 | package org.onosproject.routing.impl; |
| 18 | |
| 19 | import org.apache.felix.scr.annotations.Activate; |
| 20 | import org.apache.felix.scr.annotations.Component; |
| 21 | import org.apache.felix.scr.annotations.Deactivate; |
| 22 | import org.apache.felix.scr.annotations.Reference; |
| 23 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 24 | import org.onosproject.core.ApplicationId; |
| 25 | import org.onosproject.core.CoreService; |
| 26 | import org.onosproject.incubator.net.intf.Interface; |
| 27 | import org.onosproject.incubator.net.intf.InterfaceEvent; |
| 28 | import org.onosproject.incubator.net.intf.InterfaceListener; |
| 29 | import org.onosproject.incubator.net.intf.InterfaceService; |
| 30 | import org.onosproject.incubator.net.neighbour.NeighbourMessageContext; |
| 31 | import org.onosproject.incubator.net.neighbour.NeighbourMessageHandler; |
| 32 | import org.onosproject.incubator.net.neighbour.NeighbourResolutionService; |
| 33 | import org.onosproject.net.ConnectPoint; |
| 34 | import org.onosproject.net.Host; |
| 35 | import org.onosproject.net.config.NetworkConfigEvent; |
| 36 | import org.onosproject.net.config.NetworkConfigListener; |
| 37 | import org.onosproject.net.config.NetworkConfigService; |
| 38 | import org.onosproject.net.host.HostService; |
| 39 | import org.onosproject.routing.RoutingService; |
| 40 | import org.onosproject.routing.config.BgpConfig; |
| 41 | |
| 42 | import java.util.HashSet; |
| 43 | import java.util.Set; |
| 44 | |
| 45 | import static org.onosproject.net.HostId.hostId; |
| 46 | |
| 47 | /** |
| 48 | * Manages neighbour message handlers for the use case of internal BGP speakers |
| 49 | * connected to the network at some point that are exchanging neighbour |
| 50 | * resolution messages with external routers that are connected behind interfaces. |
| 51 | * <p> |
| 52 | * For each internal speaker port we use a handler that proxies packets from |
| 53 | * that port to the appropriate external-facing interface port. |
| 54 | * For each external interface, we use a handler that responds to requests based |
| 55 | * on the interface configuration and proxies replies back the the internal BGP |
| 56 | * speaker. |
| 57 | * </p> |
| 58 | */ |
| 59 | @Component(immediate = true, enabled = false) |
| 60 | public class BgpSpeakerNeighbourHandler { |
| 61 | |
| 62 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 63 | protected CoreService coreService; |
| 64 | |
| 65 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 66 | protected NetworkConfigService configService; |
| 67 | |
| 68 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 69 | protected InterfaceService interfaceService; |
| 70 | |
| 71 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 72 | protected NeighbourResolutionService neighbourService; |
| 73 | |
| 74 | private ApplicationId appId; |
| 75 | |
| 76 | private Set<ConnectPoint> speakerConnectPoints = new HashSet<>(); |
| 77 | |
| 78 | |
| 79 | private InternalNetworkConfigListener configListener = new InternalNetworkConfigListener(); |
| 80 | private InternalInterfaceListener interfaceListener = new InternalInterfaceListener(); |
| 81 | |
| 82 | private ExternalInterfaceNeighbourHandler externalHandler = new ExternalInterfaceNeighbourHandler(); |
| 83 | private InternalSpeakerNeighbourHandler internalHandler = new InternalSpeakerNeighbourHandler(); |
| 84 | |
| 85 | @Activate |
| 86 | protected void activate() { |
| 87 | appId = coreService.registerApplication(RoutingService.ROUTER_APP_ID); |
| 88 | configService.addListener(configListener); |
| 89 | interfaceService.addListener(interfaceListener); |
| 90 | |
| 91 | interfaceService.getInterfaces().forEach( |
| 92 | intf -> neighbourService.registerNeighbourHandler(intf, externalHandler, appId)); |
| 93 | configureSpeakerHandlers(); |
| 94 | } |
| 95 | |
| 96 | @Deactivate |
| 97 | protected void deactivate() { |
| 98 | configService.removeListener(configListener); |
| 99 | interfaceService.removeListener(interfaceListener); |
| 100 | |
| 101 | neighbourService.unregisterNeighbourHandlers(appId); |
| 102 | } |
| 103 | |
| 104 | private void configureSpeakerHandlers() { |
| 105 | BgpConfig config = configService.getConfig(appId, RoutingService.CONFIG_CLASS); |
| 106 | |
| 107 | if (config == null) { |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | speakerConnectPoints.forEach( |
| 112 | cp -> neighbourService.unregisterNeighbourHandler(cp, internalHandler, appId)); |
| 113 | speakerConnectPoints.clear(); |
| 114 | |
| 115 | config.bgpSpeakers().forEach(speaker -> { |
| 116 | neighbourService.registerNeighbourHandler(speaker.connectPoint(), internalHandler, appId); |
| 117 | speakerConnectPoints.add(speaker.connectPoint()); |
| 118 | }); |
| 119 | } |
| 120 | |
| 121 | private void updateInterface(Interface intf) { |
| 122 | // Only use interfaces that have an IP address |
| 123 | if (!intf.ipAddresses().isEmpty()) { |
| 124 | neighbourService.registerNeighbourHandler(intf, externalHandler, appId); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | private void removeInterface(Interface intf) { |
| 129 | neighbourService.unregisterNeighbourHandler(intf, externalHandler, appId); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Neighbour message handler for external facing ports that have interface |
| 134 | * configuration. |
| 135 | */ |
| 136 | public class ExternalInterfaceNeighbourHandler implements |
| 137 | NeighbourMessageHandler { |
| 138 | |
| 139 | @Override |
| 140 | public void handleMessage(NeighbourMessageContext context, HostService hostService) { |
| 141 | switch (context.type()) { |
| 142 | case REQUEST: |
| 143 | // Reply to requests that target our configured interface IP |
| 144 | // address on this port. Drop all other requests. |
Jonathan Hart | a9e2955 | 2016-09-09 07:17:41 -0700 | [diff] [blame] | 145 | interfaceService.getInterfacesByPort(context.inPort()) |
| 146 | .stream() |
| 147 | .filter(intf -> intf.ipAddresses() |
| 148 | .stream() |
Jonathan Hart | 1e393bb | 2016-09-14 08:51:09 -0700 | [diff] [blame] | 149 | .anyMatch(ia -> ia.ipAddress().equals(context.target()) && |
| 150 | ia.subnetAddress().contains(context.sender()))) |
Jonathan Hart | a9e2955 | 2016-09-09 07:17:41 -0700 | [diff] [blame] | 151 | .forEach(intf -> context.reply(intf.mac())); |
| 152 | |
| 153 | break; |
| 154 | case REPLY: |
| 155 | // Proxy replies over to our internal BGP speaker if the host |
| 156 | // is known to us |
| 157 | Host h = hostService.getHost(hostId(context.dstMac(), context.vlan())); |
| 158 | |
| 159 | if (h == null) { |
| 160 | context.drop(); |
| 161 | } else { |
Jonathan Hart | 8a2e1c4 | 2016-09-21 12:04:45 -0700 | [diff] [blame^] | 162 | context.forward(h.location()); |
Jonathan Hart | a9e2955 | 2016-09-09 07:17:41 -0700 | [diff] [blame] | 163 | } |
| 164 | break; |
| 165 | default: |
| 166 | break; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * Neighbour message handler for ports connected to the internal BGP speakers. |
| 174 | */ |
| 175 | private class InternalSpeakerNeighbourHandler implements |
| 176 | NeighbourMessageHandler { |
| 177 | @Override |
| 178 | public void handleMessage(NeighbourMessageContext context, HostService hostService) { |
| 179 | // For messages coming from a BGP speaker, look at the sender address |
| 180 | // to find the interface to proxy to |
| 181 | interfaceService.getInterfacesByIp(context.sender()) |
| 182 | .stream() |
| 183 | .filter(intf -> intf.vlan().equals(context.vlan())) |
| 184 | .map(intf -> intf.connectPoint()) |
Jonathan Hart | 8a2e1c4 | 2016-09-21 12:04:45 -0700 | [diff] [blame^] | 185 | .forEach(context::forward); |
Jonathan Hart | a9e2955 | 2016-09-09 07:17:41 -0700 | [diff] [blame] | 186 | } |
| 187 | } |
| 188 | |
| 189 | private class InternalNetworkConfigListener implements |
| 190 | NetworkConfigListener { |
| 191 | |
| 192 | @Override |
| 193 | public void event(NetworkConfigEvent event) { |
| 194 | switch (event.type()) { |
| 195 | case CONFIG_REGISTERED: |
| 196 | break; |
| 197 | case CONFIG_UNREGISTERED: |
| 198 | break; |
| 199 | case CONFIG_ADDED: |
| 200 | case CONFIG_UPDATED: |
| 201 | case CONFIG_REMOVED: |
| 202 | if (event.configClass() == RoutingService.CONFIG_CLASS) { |
| 203 | configureSpeakerHandlers(); |
| 204 | } |
| 205 | break; |
| 206 | default: |
| 207 | break; |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | private class InternalInterfaceListener implements InterfaceListener { |
| 213 | |
| 214 | @Override |
| 215 | public void event(InterfaceEvent event) { |
| 216 | switch (event.type()) { |
| 217 | case INTERFACE_ADDED: |
| 218 | updateInterface(event.subject()); |
| 219 | break; |
| 220 | case INTERFACE_UPDATED: |
| 221 | break; |
| 222 | case INTERFACE_REMOVED: |
| 223 | removeInterface(event.subject()); |
| 224 | break; |
| 225 | default: |
| 226 | break; |
| 227 | } |
| 228 | } |
| 229 | } |
| 230 | } |