Shashikanth VH | 1ca26ce | 2015-11-20 23:19:49 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with |
| 5 | * the License. You may obtain a copy of the License at |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on |
| 10 | * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the |
| 11 | * specific language governing permissions and limitations under the License. |
| 12 | */ |
| 13 | |
| 14 | package org.onosproject.provider.bgp.topology.impl; |
| 15 | |
| 16 | import static com.google.common.base.Preconditions.checkNotNull; |
| 17 | import static org.onosproject.bgp.controller.BgpDpid.uri; |
| 18 | import static org.onosproject.net.DeviceId.deviceId; |
| 19 | |
| 20 | import java.util.ArrayList; |
| 21 | import java.util.HashMap; |
| 22 | import java.util.List; |
| 23 | |
| 24 | import org.onlab.packet.ChassisId; |
| 25 | import org.apache.felix.scr.annotations.Activate; |
| 26 | import org.apache.felix.scr.annotations.Component; |
| 27 | import org.apache.felix.scr.annotations.Deactivate; |
| 28 | import org.apache.felix.scr.annotations.Reference; |
| 29 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 30 | import org.onosproject.bgp.controller.BGPController; |
| 31 | import org.onosproject.bgp.controller.BgpDpid; |
| 32 | import org.onosproject.bgp.controller.BgpLinkListener; |
| 33 | import org.onosproject.bgp.controller.BgpNodeListener; |
| 34 | import org.onosproject.bgpio.protocol.linkstate.BgpLinkLsNlriVer4; |
| 35 | import org.onosproject.bgpio.protocol.linkstate.BGPNodeLSNlriVer4; |
| 36 | import org.onosproject.net.ConnectPoint; |
| 37 | import org.onosproject.net.Device; |
| 38 | import org.onosproject.net.DeviceId; |
| 39 | import org.onosproject.net.Link; |
| 40 | import org.onosproject.net.MastershipRole; |
| 41 | import org.onosproject.net.device.DefaultDeviceDescription; |
| 42 | import org.onosproject.net.device.DefaultPortDescription; |
| 43 | import org.onosproject.net.device.DeviceDescription; |
| 44 | import org.onosproject.net.device.DeviceProvider; |
| 45 | import org.onosproject.net.device.DeviceProviderRegistry; |
| 46 | import org.onosproject.net.device.DeviceProviderService; |
| 47 | import org.onosproject.net.device.PortDescription; |
| 48 | import org.onosproject.net.link.DefaultLinkDescription; |
| 49 | import org.onosproject.net.link.LinkDescription; |
| 50 | import org.onosproject.net.link.LinkProvider; |
| 51 | import org.onosproject.net.link.LinkProviderRegistry; |
| 52 | import org.onosproject.net.link.LinkProviderService; |
| 53 | import org.onosproject.net.provider.AbstractProvider; |
| 54 | import org.onosproject.net.provider.ProviderId; |
| 55 | import org.slf4j.Logger; |
| 56 | import org.slf4j.LoggerFactory; |
| 57 | |
| 58 | /** |
| 59 | * Provider which uses an BGP controller to detect network infrastructure topology. |
| 60 | */ |
| 61 | @Component(immediate = true) |
| 62 | public class BgpTopologyProvider extends AbstractProvider implements LinkProvider, DeviceProvider { |
| 63 | |
| 64 | public BgpTopologyProvider() { |
| 65 | super(new ProviderId("bgp", "org.onosproject.provider.bgp")); |
| 66 | } |
| 67 | |
| 68 | private static final Logger log = LoggerFactory.getLogger(BgpTopologyProvider.class); |
| 69 | |
| 70 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 71 | protected LinkProviderRegistry linkProviderRegistry; |
| 72 | |
| 73 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 74 | protected DeviceProviderRegistry deviceProviderRegistry; |
| 75 | |
| 76 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 77 | protected BGPController controller; |
| 78 | |
| 79 | private DeviceProviderService deviceProviderService; |
| 80 | private LinkProviderService linkProviderService; |
| 81 | |
| 82 | private HashMap<String, List<PortDescription>> portMap = new HashMap<>(); |
| 83 | private InternalBgpProvider listener = new InternalBgpProvider(); |
| 84 | private static final String UNKNOWN = "unknown"; |
| 85 | |
| 86 | @Activate |
| 87 | public void activate() { |
| 88 | linkProviderService = linkProviderRegistry.register(this); |
| 89 | deviceProviderService = deviceProviderRegistry.register(this); |
| 90 | controller.addListener(listener); |
| 91 | controller.addLinkListener(listener); |
| 92 | } |
| 93 | |
| 94 | @Deactivate |
| 95 | public void deactivate() { |
| 96 | linkProviderRegistry.unregister(this); |
| 97 | linkProviderService = null; |
| 98 | controller.removeListener(listener); |
| 99 | controller.removeLinkListener(listener); |
| 100 | } |
| 101 | |
| 102 | private List<PortDescription> buildPortDescriptions(String linkUri) { |
| 103 | |
| 104 | List<PortDescription> portList; |
| 105 | |
| 106 | if (portMap.containsKey(linkUri)) { |
| 107 | portList = portMap.get(linkUri); |
| 108 | } else { |
| 109 | portList = new ArrayList<>(); |
| 110 | } |
| 111 | |
| 112 | // TODO: port description |
| 113 | portList.add(new DefaultPortDescription(null, true)); |
| 114 | |
| 115 | portMap.put(linkUri, portList); |
| 116 | return portList; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Build a link description from a bgp link. |
| 121 | * |
| 122 | * @param bgpLink bgp link |
| 123 | * @return linkDescription link description |
| 124 | */ |
| 125 | private LinkDescription buildLinkDescription(BgpLinkLsNlriVer4 bgpLink) { |
| 126 | LinkDescription ld = null; |
| 127 | checkNotNull(bgpLink); |
| 128 | |
| 129 | BgpDpid localNodeUri = new BgpDpid(bgpLink, BgpDpid.NODE_DESCRIPTOR_LOCAL); |
| 130 | DeviceId srcDeviceID = deviceId(uri(localNodeUri.toString())); |
| 131 | |
| 132 | BgpDpid remoteNodeUri = new BgpDpid(bgpLink, BgpDpid.NODE_DESCRIPTOR_REMOTE); |
| 133 | DeviceId dstDeviceID = deviceId(uri(remoteNodeUri.toString())); |
| 134 | |
| 135 | deviceProviderService.updatePorts(srcDeviceID, buildPortDescriptions(localNodeUri.toString())); |
| 136 | |
| 137 | deviceProviderService.updatePorts(dstDeviceID, buildPortDescriptions(remoteNodeUri.toString())); |
| 138 | |
| 139 | ConnectPoint src = new ConnectPoint(srcDeviceID, null); |
| 140 | |
| 141 | ConnectPoint dst = new ConnectPoint(dstDeviceID, null); |
| 142 | |
| 143 | ld = new DefaultLinkDescription(src, dst, Link.Type.INDIRECT); |
| 144 | return ld; |
| 145 | } |
| 146 | |
| 147 | /* |
| 148 | * Implements device and link update. |
| 149 | */ |
| 150 | private class InternalBgpProvider implements BgpNodeListener, BgpLinkListener { |
| 151 | |
| 152 | @Override |
| 153 | public void addNode(BGPNodeLSNlriVer4 nodeNlri) { |
| 154 | log.debug("Add node {}", nodeNlri.toString()); |
| 155 | |
| 156 | if (deviceProviderService == null) { |
| 157 | return; |
| 158 | } |
| 159 | BgpDpid nodeUri = new BgpDpid(nodeNlri); |
| 160 | DeviceId deviceId = deviceId(uri(nodeUri.toString())); |
| 161 | ChassisId cId = new ChassisId(); |
| 162 | |
| 163 | DeviceDescription description = new DefaultDeviceDescription(uri(nodeUri.toString()), Device.Type.ROUTER, |
| 164 | UNKNOWN, UNKNOWN, UNKNOWN, UNKNOWN, cId); |
| 165 | deviceProviderService.deviceConnected(deviceId, description); |
| 166 | |
| 167 | } |
| 168 | |
| 169 | @Override |
| 170 | public void deleteNode(BGPNodeLSNlriVer4 nodeNlri) { |
| 171 | log.debug("Delete node {}", nodeNlri.toString()); |
| 172 | |
| 173 | if (deviceProviderService == null) { |
| 174 | return; |
| 175 | } |
| 176 | |
| 177 | BgpDpid nodeUri = new BgpDpid(nodeNlri); |
| 178 | deviceProviderService.deviceDisconnected(deviceId(uri(nodeUri.toString()))); |
| 179 | } |
| 180 | |
| 181 | @Override |
| 182 | public void addLink(BgpLinkLsNlriVer4 linkNlri) { |
| 183 | log.debug("Add link {}", linkNlri.toString()); |
| 184 | |
| 185 | if (linkProviderService == null) { |
| 186 | return; |
| 187 | } |
| 188 | |
| 189 | LinkDescription ld = buildLinkDescription(linkNlri); |
| 190 | if (ld == null) { |
| 191 | log.error("Invalid link info."); |
| 192 | return; |
| 193 | } |
| 194 | |
| 195 | linkProviderService.linkDetected(ld); |
| 196 | } |
| 197 | |
| 198 | @Override |
| 199 | public void deleteLink(BgpLinkLsNlriVer4 linkNlri) { |
| 200 | log.debug("Delete link {}", linkNlri.toString()); |
| 201 | |
| 202 | if (linkProviderService == null) { |
| 203 | return; |
| 204 | } |
| 205 | |
| 206 | LinkDescription ld = buildLinkDescription(linkNlri); |
| 207 | if (ld == null) { |
| 208 | log.error("Invalid link info."); |
| 209 | return; |
| 210 | } |
| 211 | |
| 212 | linkProviderService.linkVanished(ld); |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | @Override |
| 217 | public void triggerProbe(DeviceId deviceId) { |
| 218 | // TODO Auto-generated method stub |
| 219 | } |
| 220 | |
| 221 | @Override |
| 222 | public void roleChanged(DeviceId deviceId, MastershipRole newRole) { |
| 223 | } |
| 224 | |
| 225 | @Override |
| 226 | public boolean isReachable(DeviceId deviceId) { |
| 227 | // TODO Auto-generated method stub |
| 228 | return true; |
| 229 | } |
| 230 | } |