Mohammad Shahid | 30fedc5 | 2017-08-09 11:49:40 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017-present Open Networking Foundation |
| 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.route.impl; |
| 15 | |
| 16 | import org.apache.felix.scr.annotations.Activate; |
| 17 | import org.apache.felix.scr.annotations.Component; |
| 18 | import org.apache.felix.scr.annotations.Deactivate; |
| 19 | import org.apache.felix.scr.annotations.Reference; |
| 20 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 21 | import org.onlab.packet.Ip4Address; |
| 22 | import org.onlab.packet.IpAddress; |
| 23 | import org.onlab.packet.IpPrefix; |
| 24 | import org.onlab.packet.MacAddress; |
| 25 | import org.onosproject.bgp.controller.BgpController; |
| 26 | import org.onosproject.bgp.controller.BgpId; |
| 27 | import org.onosproject.bgp.controller.BgpPeer.FlowSpecOperation; |
| 28 | import org.onosproject.bgp.controller.BgpRouteListener; |
| 29 | import org.onosproject.bgpio.protocol.BgpEvpnNlri; |
| 30 | import org.onosproject.bgpio.protocol.BgpUpdateMsg; |
| 31 | import org.onosproject.bgpio.protocol.evpn.BgpEvpnNlriImpl; |
| 32 | import org.onosproject.bgpio.protocol.evpn.BgpEvpnRouteType; |
| 33 | import org.onosproject.bgpio.protocol.evpn.BgpEvpnRouteType2Nlri; |
| 34 | import org.onosproject.bgpio.types.BgpEvpnEsi; |
| 35 | import org.onosproject.bgpio.types.BgpEvpnLabel; |
| 36 | import org.onosproject.bgpio.types.BgpExtendedCommunity; |
| 37 | import org.onosproject.bgpio.types.BgpNlriType; |
| 38 | import org.onosproject.bgpio.types.BgpValueType; |
| 39 | import org.onosproject.bgpio.types.MpReachNlri; |
| 40 | import org.onosproject.bgpio.types.MpUnReachNlri; |
| 41 | import org.onosproject.bgpio.types.RouteDistinguisher; |
| 42 | import org.onosproject.bgpio.types.RouteTarget; |
Ray Milkey | a95193c | 2017-08-10 15:35:36 -0700 | [diff] [blame] | 43 | import org.onosproject.evpnrouteservice.EvpnRoute; |
| 44 | import org.onosproject.evpnrouteservice.EvpnRoute.Source; |
| 45 | import org.onosproject.evpnrouteservice.EvpnRouteAdminService; |
| 46 | import org.onosproject.evpnrouteservice.EvpnRouteEvent; |
| 47 | import org.onosproject.evpnrouteservice.EvpnRouteListener; |
| 48 | import org.onosproject.evpnrouteservice.VpnRouteTarget; |
Mohammad Shahid | 30fedc5 | 2017-08-09 11:49:40 +0530 | [diff] [blame] | 49 | import org.onosproject.net.provider.AbstractProvider; |
| 50 | import org.onosproject.net.provider.ProviderId; |
| 51 | import org.slf4j.Logger; |
| 52 | import org.slf4j.LoggerFactory; |
| 53 | |
| 54 | import java.net.InetAddress; |
| 55 | import java.util.ArrayList; |
| 56 | import java.util.Collections; |
| 57 | import java.util.Iterator; |
| 58 | import java.util.LinkedList; |
| 59 | import java.util.List; |
| 60 | |
| 61 | /** |
| 62 | * Provider which uses an BGP controller to update/delete route. |
| 63 | */ |
| 64 | @Component(immediate = true) |
| 65 | public class BgpRouteProvider extends AbstractProvider { |
| 66 | |
| 67 | /** |
| 68 | * Creates an instance of BGP route provider. |
| 69 | */ |
| 70 | public BgpRouteProvider() { |
| 71 | super(new ProviderId("route", |
| 72 | "org.onosproject.provider.bgp.route.impl")); |
| 73 | } |
| 74 | |
| 75 | private static final Logger log = LoggerFactory |
| 76 | .getLogger(BgpRouteProvider.class); |
| 77 | |
| 78 | |
| 79 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 80 | protected BgpController controller; |
| 81 | |
| 82 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 83 | protected EvpnRouteAdminService evpnRouteAdminService; |
| 84 | |
| 85 | private final InternalEvpnRouteListener routeListener = new |
| 86 | InternalEvpnRouteListener(); |
| 87 | private final InternalBgpRouteListener bgpRouteListener = new |
| 88 | InternalBgpRouteListener(); |
| 89 | |
| 90 | |
| 91 | @Activate |
| 92 | public void activate() { |
| 93 | controller.addRouteListener(bgpRouteListener); |
| 94 | evpnRouteAdminService.addListener(routeListener); |
| 95 | log.info("Started"); |
| 96 | } |
| 97 | |
| 98 | @Deactivate |
| 99 | public void deactivate() { |
| 100 | controller.removeRouteListener(bgpRouteListener); |
| 101 | evpnRouteAdminService.removeListener(routeListener); |
| 102 | log.info("Stopped"); |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Handles the bgp route update message. |
| 107 | * |
| 108 | * @param operationType operationType |
| 109 | * @param rdString rd |
| 110 | * @param exportRtList rt export |
| 111 | * @param nextHop next hop |
| 112 | * @param macAddress mac address |
| 113 | * @param ipAddress ip address |
| 114 | * @param labelInt label |
| 115 | */ |
| 116 | private void sendUpdateMessage(FlowSpecOperation operationType, |
| 117 | String rdString, |
| 118 | List<VpnRouteTarget> exportRtList, |
| 119 | IpAddress nextHop, |
| 120 | MacAddress macAddress, |
| 121 | InetAddress ipAddress, |
| 122 | int labelInt) { |
| 123 | log.info("sendUpdateMessage 1"); |
| 124 | |
| 125 | List<BgpEvpnNlri> eVpnNlri = new ArrayList<BgpEvpnNlri>(); |
| 126 | RouteDistinguisher rd = stringToRD(rdString); |
| 127 | BgpEvpnEsi esi = new BgpEvpnEsi(new byte[10]); |
| 128 | int ethernetTagID = 0; |
| 129 | BgpEvpnLabel mplsLabel1 = intToLabel(labelInt); |
| 130 | BgpEvpnLabel mplsLabel2 = null; |
| 131 | |
| 132 | List<BgpValueType> extCom = new ArrayList<BgpValueType>(); |
| 133 | if ((operationType == FlowSpecOperation.UPDATE) |
| 134 | && (!exportRtList.isEmpty())) { |
| 135 | for (VpnRouteTarget rt : exportRtList) { |
| 136 | RouteTarget rTarget = stringToRT(rt.getRouteTarget()); |
| 137 | extCom.add(rTarget); |
| 138 | } |
| 139 | } |
| 140 | BgpEvpnRouteType2Nlri routeTypeSpec = |
| 141 | new BgpEvpnRouteType2Nlri(rd, |
| 142 | esi, |
| 143 | ethernetTagID, |
| 144 | macAddress, |
| 145 | ipAddress, |
| 146 | mplsLabel1, |
| 147 | mplsLabel2); |
| 148 | BgpEvpnNlri nlri = new BgpEvpnNlriImpl(BgpEvpnRouteType |
| 149 | .MAC_IP_ADVERTISEMENT |
| 150 | .getType(), |
| 151 | routeTypeSpec); |
| 152 | eVpnNlri.add(nlri); |
| 153 | log.info("sendUpdateMessage 2"); |
| 154 | controller.getPeers().forEach(peer -> { |
| 155 | log.info("Send route update eVpnComponents {} to peer {}", |
| 156 | eVpnNlri, peer); |
| 157 | peer.updateEvpnNlri(operationType, nextHop, extCom, eVpnNlri); |
| 158 | }); |
| 159 | |
| 160 | } |
| 161 | |
| 162 | private static RouteDistinguisher stringToRD(String rdString) { |
| 163 | if (rdString.contains(":")) { |
| 164 | if ((rdString.indexOf(":") != 0) |
| 165 | && (rdString.indexOf(":") != rdString.length() - 1)) { |
| 166 | String[] tem = rdString.split(":"); |
| 167 | short as = (short) Integer.parseInt(tem[0]); |
| 168 | int assignednum = Integer.parseInt(tem[1]); |
| 169 | long rd = ((long) assignednum & 0xFFFFFFFFL) |
| 170 | | (((long) as << 32) & 0xFFFFFFFF00000000L); |
| 171 | return new RouteDistinguisher(rd); |
| 172 | } |
| 173 | } |
| 174 | return null; |
| 175 | |
| 176 | } |
| 177 | |
| 178 | private static String rdToString(RouteDistinguisher rd) { |
| 179 | long rdLong = rd.getRouteDistinguisher(); |
| 180 | int as = (int) ((rdLong & 0xFFFFFFFF00000000L) >> 32); |
| 181 | int assignednum = (int) (rdLong & 0xFFFFFFFFL); |
| 182 | String result = as + ":" + assignednum; |
| 183 | return result; |
| 184 | } |
| 185 | |
| 186 | private static RouteTarget stringToRT(String rdString) { |
| 187 | if (rdString.contains(":")) { |
| 188 | if ((rdString.indexOf(":") != 0) |
| 189 | && (rdString.indexOf(":") != rdString.length() - 1)) { |
| 190 | String[] tem = rdString.split(":"); |
| 191 | short as = Short.parseShort(tem[0]); |
| 192 | int assignednum = Integer.parseInt(tem[1]); |
| 193 | |
| 194 | byte[] rt = new byte[]{(byte) ((as >> 8) & 0xFF), |
| 195 | (byte) (as & 0xFF), |
| 196 | (byte) ((assignednum >> 24) & 0xFF), |
| 197 | (byte) ((assignednum >> 16) & 0xFF), |
| 198 | (byte) ((assignednum >> 8) & 0xFF), |
| 199 | (byte) (assignednum & 0xFF)}; |
| 200 | short type = 0x02; |
| 201 | return new RouteTarget(type, rt); |
| 202 | } |
| 203 | } |
| 204 | return null; |
| 205 | |
| 206 | } |
| 207 | |
| 208 | private static String rtToString(RouteTarget rt) { |
| 209 | byte[] b = rt.getRouteTarget(); |
| 210 | |
| 211 | int assignednum = b[5] & 0xFF | (b[4] & 0xFF) << 8 | (b[3] & 0xFF) << 16 |
| 212 | | (b[2] & 0xFF) << 24; |
| 213 | short as = (short) (b[1] & 0xFF | (b[0] & 0xFF) << 8); |
| 214 | String result = as + ":" + assignednum; |
| 215 | return result; |
| 216 | } |
| 217 | |
| 218 | private static BgpEvpnLabel intToLabel(int labelInt) { |
| 219 | byte[] label = new byte[]{(byte) ((labelInt >> 16) & 0xFF), |
| 220 | (byte) ((labelInt >> 8) & 0xFF), |
| 221 | (byte) (labelInt & 0xFF)}; |
| 222 | |
| 223 | return new BgpEvpnLabel(label); |
| 224 | } |
| 225 | |
| 226 | private static int labelToInt(BgpEvpnLabel label) { |
| 227 | byte[] b = label.getMplsLabel(); |
| 228 | return b[2] & 0xFF | (b[1] & 0xFF) << 8 | (b[0] & 0xFF) << 16; |
| 229 | |
| 230 | } |
| 231 | |
| 232 | private class InternalBgpRouteListener implements BgpRouteListener { |
| 233 | |
| 234 | @Override |
| 235 | public void processRoute(BgpId bgpId, BgpUpdateMsg updateMsg) { |
| 236 | log.info("Evpn route event received from BGP protocol"); |
| 237 | List<BgpValueType> pathAttr = updateMsg.bgpPathAttributes() |
| 238 | .pathAttributes(); |
| 239 | Iterator<BgpValueType> iterator = pathAttr.iterator(); |
| 240 | RouteTarget rt = null; |
| 241 | List<VpnRouteTarget> exportRt = new LinkedList<>(); |
| 242 | List<BgpEvpnNlri> evpnReachNlri = new LinkedList<>(); |
| 243 | List<BgpEvpnNlri> evpnUnreachNlri = new LinkedList<>(); |
| 244 | |
| 245 | Ip4Address ipNextHop = null; |
| 246 | while (iterator.hasNext()) { |
| 247 | BgpValueType attr = iterator.next(); |
| 248 | if (attr instanceof MpReachNlri) { |
| 249 | MpReachNlri mpReachNlri = (MpReachNlri) attr; |
| 250 | ipNextHop = mpReachNlri.nexthop4(); |
| 251 | if (mpReachNlri |
| 252 | .getNlriDetailsType() == BgpNlriType.EVPN) { |
| 253 | evpnReachNlri.addAll(mpReachNlri.bgpEvpnNlri()); |
| 254 | } |
| 255 | |
| 256 | } |
| 257 | if (attr instanceof MpUnReachNlri) { |
| 258 | MpUnReachNlri mpUnReachNlri = (MpUnReachNlri) attr; |
| 259 | if (mpUnReachNlri |
| 260 | .getNlriDetailsType() == BgpNlriType.EVPN) { |
| 261 | evpnUnreachNlri.addAll(mpUnReachNlri.bgpEvpnNlri()); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | if (attr instanceof BgpExtendedCommunity) { |
| 266 | BgpExtendedCommunity extCom = (BgpExtendedCommunity) attr; |
| 267 | Iterator<BgpValueType> extIte = extCom.fsActionTlv() |
| 268 | .iterator(); |
| 269 | while (extIte.hasNext()) { |
| 270 | BgpValueType extAttr = extIte.next(); |
| 271 | if (extAttr instanceof RouteTarget) { |
| 272 | rt = (RouteTarget) extAttr; |
| 273 | exportRt.add(VpnRouteTarget |
| 274 | .routeTarget(rtToString(rt))); |
| 275 | break; |
| 276 | } |
| 277 | } |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | if ((!exportRt.isEmpty()) && (!evpnReachNlri.isEmpty())) { |
| 282 | for (BgpEvpnNlri nlri : evpnReachNlri) { |
| 283 | if (nlri.getRouteType() == BgpEvpnRouteType |
| 284 | .MAC_IP_ADVERTISEMENT) { |
| 285 | BgpEvpnRouteType2Nlri macIpAdvNlri |
| 286 | = (BgpEvpnRouteType2Nlri) nlri |
| 287 | .getNlri(); |
| 288 | MacAddress macAddress = macIpAdvNlri.getMacAddress(); |
| 289 | Ip4Address ipAddress = Ip4Address |
| 290 | .valueOf(macIpAdvNlri.getIpAddress()); |
| 291 | RouteDistinguisher rd = macIpAdvNlri |
| 292 | .getRouteDistinguisher(); |
| 293 | BgpEvpnLabel label = macIpAdvNlri.getMplsLable1(); |
| 294 | log.info("Route Provider received bgp packet {} " + |
| 295 | "to route system.", |
| 296 | macIpAdvNlri.toString()); |
| 297 | // Add route to route system |
| 298 | Source source = Source.REMOTE; |
| 299 | EvpnRoute evpnRoute = new EvpnRoute(source, |
| 300 | macAddress, |
| 301 | IpPrefix.valueOf(ipAddress, 32), |
| 302 | ipNextHop, |
| 303 | rdToString(rd), |
| 304 | null, //empty rt |
| 305 | exportRt, |
| 306 | labelToInt(label)); |
| 307 | |
| 308 | evpnRouteAdminService.update(Collections |
| 309 | .singleton(evpnRoute)); |
| 310 | } |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | if (!evpnUnreachNlri.isEmpty()) { |
| 315 | for (BgpEvpnNlri nlri : evpnUnreachNlri) { |
| 316 | if (nlri.getRouteType() == BgpEvpnRouteType |
| 317 | .MAC_IP_ADVERTISEMENT) { |
| 318 | BgpEvpnRouteType2Nlri macIpAdvNlri |
| 319 | = (BgpEvpnRouteType2Nlri) nlri |
| 320 | .getNlri(); |
| 321 | MacAddress macAddress = macIpAdvNlri.getMacAddress(); |
| 322 | Ip4Address ipAddress = Ip4Address |
| 323 | .valueOf(macIpAdvNlri.getIpAddress()); |
| 324 | RouteDistinguisher rd = macIpAdvNlri |
| 325 | .getRouteDistinguisher(); |
| 326 | BgpEvpnLabel label = macIpAdvNlri.getMplsLable1(); |
| 327 | log.info("Route Provider received bgp packet {} " + |
| 328 | "and remove from route system.", |
| 329 | macIpAdvNlri.toString()); |
| 330 | // Delete route from route system |
| 331 | Source source = Source.REMOTE; |
| 332 | // For mpUnreachNlri, nexthop and rt is null |
| 333 | EvpnRoute evpnRoute = new EvpnRoute(source, |
| 334 | macAddress, |
| 335 | IpPrefix.valueOf(ipAddress, 32), |
| 336 | null, |
| 337 | rdToString(rd), |
| 338 | null, |
| 339 | null, |
| 340 | labelToInt(label)); |
| 341 | |
| 342 | evpnRouteAdminService.withdraw(Collections |
| 343 | .singleton(evpnRoute)); |
| 344 | } |
| 345 | } |
| 346 | } |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | private class InternalEvpnRouteListener implements EvpnRouteListener { |
| 351 | |
| 352 | @Override |
| 353 | public void event(EvpnRouteEvent event) { |
| 354 | log.info("evpnroute event is received from evpn route manager"); |
| 355 | FlowSpecOperation operationType = null; |
| 356 | EvpnRoute route = event.subject(); |
| 357 | EvpnRoute evpnRoute = route; |
| 358 | log.info("Event received for public route {}", evpnRoute); |
| 359 | if (evpnRoute.source().equals(Source.REMOTE)) { |
| 360 | return; |
| 361 | } |
| 362 | switch (event.type()) { |
| 363 | case ROUTE_ADDED: |
| 364 | case ROUTE_UPDATED: |
| 365 | log.info("route added"); |
| 366 | operationType = FlowSpecOperation.UPDATE; |
| 367 | break; |
| 368 | case ROUTE_REMOVED: |
| 369 | log.info("route deleted"); |
| 370 | operationType = FlowSpecOperation.DELETE; |
| 371 | break; |
| 372 | default: |
| 373 | break; |
| 374 | } |
| 375 | |
| 376 | String rdString = evpnRoute.routeDistinguisher() |
| 377 | .getRouteDistinguisher(); |
| 378 | MacAddress macAddress = evpnRoute.prefixMac(); |
| 379 | InetAddress inetAddress = evpnRoute.prefixIp().address().toInetAddress(); |
| 380 | IpAddress nextHop = evpnRoute.ipNextHop(); |
| 381 | List<VpnRouteTarget> exportRtList = evpnRoute |
| 382 | .exportRouteTarget(); |
| 383 | int labelInt = evpnRoute.label().getLabel(); |
| 384 | |
| 385 | sendUpdateMessage(operationType, |
| 386 | rdString, |
| 387 | exportRtList, |
| 388 | nextHop, |
| 389 | macAddress, |
| 390 | inetAddress, |
| 391 | labelInt); |
| 392 | } |
| 393 | } |
Ray Milkey | a95193c | 2017-08-10 15:35:36 -0700 | [diff] [blame] | 394 | } |