Jan Kundrát | 981fe47 | 2019-10-15 22:44:19 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019-2020 Jan Kundrát, CESNET, <jan.kundrat@cesnet.cz> and Open Networking Foundation |
| 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.drivers.czechlight; |
| 18 | |
| 19 | import com.google.common.collect.Lists; |
| 20 | |
| 21 | import org.apache.commons.configuration.HierarchicalConfiguration; |
| 22 | |
| 23 | import org.onlab.packet.ChassisId; |
| 24 | import org.onlab.util.Frequency; |
| 25 | import org.onosproject.drivers.utilities.XmlConfigParser; |
| 26 | import org.onosproject.net.ChannelSpacing; |
| 27 | import org.onosproject.net.DefaultAnnotations; |
| 28 | import org.onosproject.net.DeviceId; |
| 29 | import org.onosproject.net.Device; |
| 30 | import org.onosproject.net.PortNumber; |
| 31 | import org.onosproject.net.AnnotationKeys; |
| 32 | import org.onosproject.net.device.DefaultDeviceDescription; |
| 33 | import org.onosproject.net.device.DeviceDescription; |
| 34 | import org.onosproject.net.device.DeviceDescriptionDiscovery; |
| 35 | import org.onosproject.net.device.DeviceService; |
| 36 | import org.onosproject.net.device.PortDescription; |
| 37 | import org.onosproject.net.driver.AbstractHandlerBehaviour; |
| 38 | import org.onosproject.netconf.DatastoreId; |
| 39 | import org.onosproject.netconf.NetconfController; |
| 40 | import org.onosproject.netconf.NetconfException; |
| 41 | import org.onosproject.netconf.NetconfSession; |
| 42 | |
| 43 | import org.onosproject.odtn.behaviour.OdtnDeviceDescriptionDiscovery; |
| 44 | import org.slf4j.Logger; |
| 45 | |
| 46 | import java.util.Arrays; |
| 47 | import java.util.List; |
| 48 | |
| 49 | import static com.google.common.base.Preconditions.checkNotNull; |
| 50 | import static org.onosproject.net.optical.device.OmsPortHelper.omsPortDescription; |
| 51 | import static org.slf4j.LoggerFactory.getLogger; |
| 52 | |
| 53 | /** |
| 54 | * Device description behaviour for CzechLight SDN ROADM devices using NETCONF. |
| 55 | */ |
| 56 | public class CzechLightDiscovery |
| 57 | extends AbstractHandlerBehaviour implements DeviceDescriptionDiscovery { |
| 58 | |
| 59 | public enum DeviceType { |
| 60 | LINE_DEGREE, |
| 61 | ADD_DROP_FLEX, |
| 62 | COHERENT_ADD_DROP, |
| 63 | INLINE_AMP, |
| 64 | }; |
| 65 | public static final String DEVICE_TYPE_ANNOTATION = "czechlight.model"; |
| 66 | |
| 67 | public static final int PORT_COMMON = 100; |
| 68 | public static final int PORT_INLINE_WEST = PORT_COMMON + 1; |
| 69 | public static final int PORT_INLINE_EAST = PORT_INLINE_WEST + 1; |
| 70 | public static final ChannelSpacing CHANNEL_SPACING_50 = ChannelSpacing.CHL_50GHZ; |
| 71 | public static final ChannelSpacing CHANNEL_SPACING_NONE = ChannelSpacing.CHL_0GHZ; |
| 72 | public static final Frequency START_CENTER_FREQ_50 = Frequency.ofGHz(191_350); |
| 73 | public static final Frequency END_CENTER_FREQ_50 = Frequency.ofGHz(196_100); |
| 74 | |
| 75 | private static final String MOD_ROADM_DEVICE = "czechlight-roadm-device"; |
| 76 | private static final String MOD_ROADM_DEVICE_DATE = "2019-09-30"; |
| 77 | private static final String MOD_ROADM_FEATURE_LINE_DEGREE = "hw-line-9"; |
| 78 | private static final String MOD_ROADM_FEATURE_FLEX_ADD_DROP = "hw-add-drop-20"; |
| 79 | private static final String MOD_COHERENT_A_D = "czechlight-coherent-add-drop"; |
| 80 | private static final String MOD_COHERENT_A_D_DATE = "2019-09-30"; |
| 81 | private static final String MOD_INLINE_AMP = "czechlight-inline-amp"; |
| 82 | private static final String MOD_INLINE_AMP_DATE = "2019-09-30"; |
| 83 | private static final String NS_CZECHLIGHT_PREFIX = "http://czechlight.cesnet.cz/yang/"; |
| 84 | public static final String NS_CZECHLIGHT_ROADM_DEVICE = NS_CZECHLIGHT_PREFIX + MOD_ROADM_DEVICE; |
| 85 | public static final String NS_CZECHLIGHT_COHERENT_A_D = NS_CZECHLIGHT_PREFIX + MOD_COHERENT_A_D; |
| 86 | public static final String NS_CZECHLIGHT_INLINE_AMP = NS_CZECHLIGHT_PREFIX + MOD_INLINE_AMP; |
| 87 | |
| 88 | private static final String YANGLIB_KEY_REVISION = "data.modules-state.module.revision"; |
| 89 | private static final String YANGLIB_KEY_MODULE_NAME = "data.modules-state.module.name"; |
| 90 | private static final String YANGLIB_XMLNS = "urn:ietf:params:xml:ns:yang:ietf-yang-library"; |
| 91 | private static final String YANGLIB_XML_PREFIX = "yanglib"; |
| 92 | private static final String YANGLIB_XPATH_FILTER = "/" + YANGLIB_XML_PREFIX + ":modules-state/module[(name='" |
| 93 | + MOD_ROADM_DEVICE + "') or (name='" + MOD_COHERENT_A_D + "') or (name='" + MOD_INLINE_AMP + "')]"; |
| 94 | private static final String YANGLIB_PATH_QUERY_FEATURES = "data.modules-state.module.feature"; |
| 95 | |
| 96 | public static final String CHANNEL_DEFS_FILTER = |
| 97 | "<channel-plan xmlns=\"http://czechlight.cesnet.cz/yang/czechlight-roadm-device\">" + |
| 98 | "<channel><lower-frequency/><upper-frequency/></channel>" + |
| 99 | "</channel-plan>"; |
| 100 | private static final String UNIDIR_CFG_SUBSTR = "<port/><attenuation/><power/>"; |
| 101 | public static final String XML_MC_OPEN = "<media-channels " + |
| 102 | "xmlns=\"http://czechlight.cesnet.cz/yang/czechlight-roadm-device\">"; |
| 103 | public static final String XML_MC_CLOSE = "</media-channels>"; |
| 104 | public static final String MC_ROUTING_FILTER = |
| 105 | XML_MC_OPEN + |
| 106 | "<add>" + UNIDIR_CFG_SUBSTR + "</add>" + |
| 107 | "<drop>" + UNIDIR_CFG_SUBSTR + "</drop>" + |
| 108 | XML_MC_CLOSE; |
| 109 | |
| 110 | public static final String LINE_EXPRESS_PREFIX = "E"; |
| 111 | |
| 112 | private static final String DESC_PORT_LINE_WEST = "Line West"; |
| 113 | private static final String DESC_PORT_LINE_EAST = "Line East"; |
| 114 | private static final String DESC_PORT_LINE = "Line"; |
| 115 | private static final String DESC_PORT_EXPRESS = "Express"; |
| 116 | |
| 117 | |
| 118 | private static final Logger log = getLogger(CzechLightDiscovery.class); |
| 119 | |
| 120 | @Override |
| 121 | public DeviceDescription discoverDeviceDetails() { |
| 122 | NetconfSession session = getNetconfSession(); |
| 123 | if (session == null) { |
| 124 | log.error("Cannot request NETCONF session for {}", data().deviceId()); |
| 125 | return null; |
| 126 | } |
| 127 | |
| 128 | DefaultAnnotations.Builder annotations = DefaultAnnotations.builder(); |
| 129 | final var noDevice = new DefaultDeviceDescription(handler().data().deviceId().uri(), Device.Type.OTHER, |
| 130 | null, null, null, null, null, annotations.build()); |
| 131 | |
| 132 | try { |
| 133 | Boolean isLineDegree = false, isAddDrop = false, isCoherentAddDrop = false, isInlineAmp = false; |
| 134 | var data = doGetXPath(getNetconfSession(), YANGLIB_XML_PREFIX, YANGLIB_XMLNS, YANGLIB_XPATH_FILTER); |
| 135 | if (!data.containsKey(YANGLIB_KEY_REVISION)) { |
| 136 | log.error("Not talking to a supported CzechLight device, is that a teapot?"); |
| 137 | return noDevice; |
| 138 | } |
| 139 | final var revision = data.getString(YANGLIB_KEY_REVISION); |
| 140 | if (data.getString(YANGLIB_KEY_MODULE_NAME).equals(MOD_ROADM_DEVICE)) { |
| 141 | if (!revision.equals(MOD_ROADM_DEVICE_DATE)) { |
| 142 | log.error("Revision mismatch for YANG module {}: got {}", MOD_ROADM_DEVICE, revision); |
| 143 | return noDevice; |
| 144 | } |
| 145 | final var features = data.getStringArray(YANGLIB_PATH_QUERY_FEATURES); |
| 146 | isLineDegree = Arrays.stream(features) |
| 147 | .anyMatch(s -> s.equals(MOD_ROADM_FEATURE_LINE_DEGREE)); |
| 148 | isAddDrop = Arrays.stream(features) |
| 149 | .anyMatch(s -> s.equals(MOD_ROADM_FEATURE_FLEX_ADD_DROP)); |
| 150 | if (!isLineDegree && !isAddDrop) { |
| 151 | log.error("Device type not recognized, but {} YANG model is present. Reported YANG features: {}", |
| 152 | MOD_ROADM_DEVICE, String.join(", ", features)); |
| 153 | return noDevice; |
| 154 | } |
| 155 | } else if (data.getString(YANGLIB_KEY_MODULE_NAME).equals(MOD_COHERENT_A_D)) { |
| 156 | if (!revision.equals(MOD_COHERENT_A_D_DATE)) { |
| 157 | log.error("Revision mismatch for YANG module {}: got {}", MOD_COHERENT_A_D, revision); |
| 158 | return noDevice; |
| 159 | } |
| 160 | isCoherentAddDrop = true; |
| 161 | } else if (data.getString(YANGLIB_KEY_MODULE_NAME).equals(MOD_INLINE_AMP)) { |
| 162 | if (!revision.equals(MOD_INLINE_AMP_DATE)) { |
| 163 | log.error("Revision mismatch for YANG module {}: got {}", MOD_INLINE_AMP, revision); |
| 164 | return noDevice; |
| 165 | } |
| 166 | isInlineAmp = true; |
| 167 | } |
| 168 | |
| 169 | if (isLineDegree) { |
| 170 | log.info("Talking to a Line/Degree ROADM node"); |
| 171 | annotations.set(DEVICE_TYPE_ANNOTATION, DeviceType.LINE_DEGREE.toString()); |
| 172 | } else if (isAddDrop) { |
| 173 | log.info("Talking to an Add/Drop ROADM node"); |
| 174 | annotations.set(DEVICE_TYPE_ANNOTATION, DeviceType.ADD_DROP_FLEX.toString()); |
| 175 | } else if (isCoherentAddDrop) { |
| 176 | log.info("Talking to a Coherent Add/Drop ROADM node"); |
| 177 | annotations.set(DEVICE_TYPE_ANNOTATION, DeviceType.COHERENT_ADD_DROP.toString()); |
| 178 | } else if (isInlineAmp) { |
| 179 | log.info("Talking to an inline ampifier, not a ROADM, but we will fake it as a ROADM for now"); |
| 180 | annotations.set(DEVICE_TYPE_ANNOTATION, DeviceType.INLINE_AMP.toString()); |
| 181 | } else { |
| 182 | log.error("Device type not recognized"); |
| 183 | return noDevice; |
| 184 | } |
| 185 | } catch (NetconfException e) { |
| 186 | log.error("Cannot request ietf-yang-library data", e); |
| 187 | return noDevice; |
| 188 | } |
| 189 | |
| 190 | // FIXME: initialize these |
| 191 | String vendor = "CzechLight"; |
| 192 | String hwVersion = "n/a"; |
| 193 | String swVersion = "n/a"; |
| 194 | String serialNumber = "n/a"; |
| 195 | ChassisId chassisId = null; |
| 196 | |
| 197 | return new DefaultDeviceDescription(handler().data().deviceId().uri(), Device.Type.ROADM, |
| 198 | vendor, hwVersion, swVersion, serialNumber, chassisId, annotations.build()); |
| 199 | } |
| 200 | |
| 201 | public static String leafPortName(final DeviceType deviceType, final long number) { |
| 202 | switch (deviceType) { |
| 203 | case LINE_DEGREE: |
| 204 | return LINE_EXPRESS_PREFIX + Long.toString(number); |
| 205 | default: |
| 206 | return Long.toString(number); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | @Override |
| 211 | public List<PortDescription> discoverPortDetails() { |
| 212 | DeviceId deviceId = handler().data().deviceId(); |
| 213 | DeviceService deviceService = checkNotNull(handler().get(DeviceService.class)); |
| 214 | Device device = deviceService.getDevice(deviceId); |
| 215 | var deviceType = DeviceType.valueOf(device.annotations().value(DEVICE_TYPE_ANNOTATION)); |
| 216 | |
| 217 | List<PortDescription> portDescriptions = Lists.newArrayList(); |
| 218 | |
| 219 | if (deviceType == DeviceType.INLINE_AMP) { |
| 220 | DefaultAnnotations.Builder annotations = DefaultAnnotations.builder(); |
| 221 | annotations.set(AnnotationKeys.PORT_NAME, DESC_PORT_LINE_WEST); |
| 222 | annotations.set(OdtnDeviceDescriptionDiscovery.PORT_TYPE, |
| 223 | OdtnDeviceDescriptionDiscovery.OdtnPortType.LINE.toString()); |
| 224 | portDescriptions.add(omsPortDescription(PortNumber.portNumber(PORT_INLINE_WEST), |
| 225 | true, |
| 226 | START_CENTER_FREQ_50, |
| 227 | END_CENTER_FREQ_50, |
| 228 | CHANNEL_SPACING_50.frequency(), |
| 229 | annotations.build())); |
| 230 | |
| 231 | annotations = DefaultAnnotations.builder(); |
| 232 | annotations.set(AnnotationKeys.PORT_NAME, DESC_PORT_LINE_EAST); |
| 233 | annotations.set(OdtnDeviceDescriptionDiscovery.PORT_TYPE, |
| 234 | OdtnDeviceDescriptionDiscovery.OdtnPortType.LINE.toString()); |
| 235 | portDescriptions.add(omsPortDescription(PortNumber.portNumber(PORT_INLINE_EAST), |
| 236 | true, |
| 237 | START_CENTER_FREQ_50, |
| 238 | END_CENTER_FREQ_50, |
| 239 | CHANNEL_SPACING_50.frequency(), |
| 240 | annotations.build())); |
| 241 | |
| 242 | return portDescriptions; |
| 243 | } |
| 244 | |
| 245 | DefaultAnnotations.Builder annotationsForCommon = DefaultAnnotations.builder(); |
| 246 | switch (deviceType) { |
| 247 | case LINE_DEGREE: |
| 248 | annotationsForCommon.set(AnnotationKeys.PORT_NAME, DESC_PORT_LINE); |
| 249 | annotationsForCommon.set(OdtnDeviceDescriptionDiscovery.PORT_TYPE, |
| 250 | OdtnDeviceDescriptionDiscovery.OdtnPortType.LINE.toString()); |
| 251 | break; |
| 252 | case ADD_DROP_FLEX: |
| 253 | case COHERENT_ADD_DROP: |
| 254 | annotationsForCommon.set(AnnotationKeys.PORT_NAME, DESC_PORT_EXPRESS); |
| 255 | break; |
| 256 | case INLINE_AMP: |
| 257 | assert false : "this cannot happen because it's handled above, but I have to type this here anyway"; |
| 258 | default: |
| 259 | assert false : "unhandled device type"; |
| 260 | } |
| 261 | portDescriptions.add(omsPortDescription(PortNumber.portNumber(PORT_COMMON), |
| 262 | true, |
| 263 | START_CENTER_FREQ_50, |
| 264 | END_CENTER_FREQ_50, |
| 265 | CHANNEL_SPACING_50.frequency(), |
| 266 | annotationsForCommon.build())); |
| 267 | |
| 268 | final int leafPortCount; |
| 269 | switch (deviceType) { |
| 270 | case LINE_DEGREE: |
| 271 | leafPortCount = 9; |
| 272 | break; |
| 273 | case ADD_DROP_FLEX: |
| 274 | leafPortCount = 20; |
| 275 | break; |
| 276 | case COHERENT_ADD_DROP: |
| 277 | leafPortCount = 8; |
| 278 | break; |
| 279 | default: |
| 280 | log.error("Unsupported CzechLight device type"); |
| 281 | return null; |
| 282 | } |
| 283 | |
| 284 | for (var i = 1; i <= leafPortCount; ++i) { |
| 285 | DefaultAnnotations.Builder annotations = DefaultAnnotations.builder(); |
| 286 | final Frequency channelSpacing; |
| 287 | annotations.set(AnnotationKeys.PORT_NAME, leafPortName(deviceType, i)); |
| 288 | switch (deviceType) { |
| 289 | case LINE_DEGREE: |
| 290 | channelSpacing = CHANNEL_SPACING_50.frequency(); |
| 291 | break; |
| 292 | case ADD_DROP_FLEX: |
| 293 | annotations.set(OdtnDeviceDescriptionDiscovery.PORT_TYPE, |
| 294 | OdtnDeviceDescriptionDiscovery.OdtnPortType.CLIENT.toString()); |
| 295 | channelSpacing = CHANNEL_SPACING_50.frequency(); |
| 296 | break; |
| 297 | case COHERENT_ADD_DROP: |
| 298 | annotations.set(OdtnDeviceDescriptionDiscovery.PORT_TYPE, |
| 299 | OdtnDeviceDescriptionDiscovery.OdtnPortType.CLIENT.toString()); |
| 300 | channelSpacing = CHANNEL_SPACING_NONE.frequency(); |
| 301 | break; |
| 302 | default: |
| 303 | log.error("Unsupported CzechLight device type"); |
| 304 | return null; |
| 305 | } |
| 306 | portDescriptions.add(omsPortDescription(PortNumber.portNumber(i), |
| 307 | true, |
| 308 | START_CENTER_FREQ_50, |
| 309 | END_CENTER_FREQ_50, |
| 310 | channelSpacing, |
| 311 | annotations.build())); |
| 312 | } |
| 313 | return portDescriptions; |
| 314 | } |
| 315 | |
| 316 | private NetconfSession getNetconfSession() { |
| 317 | NetconfController controller = |
| 318 | checkNotNull(handler().get(NetconfController.class)); |
| 319 | return controller.getNetconfDevice(data().deviceId()).getSession(); |
| 320 | } |
| 321 | |
| 322 | public static double dbmToMilliwatts(final double dbm) { |
| 323 | return java.lang.Math.pow(10, dbm / 10); |
| 324 | } |
| 325 | |
| 326 | public static double milliwattsToDbm(final double mw) { |
| 327 | return 10 * java.lang.Math.log10(mw); |
| 328 | } |
| 329 | |
| 330 | /** Run a <get> NETCONF command with an XPath filter. |
| 331 | * |
| 332 | * @param session well, a NETCONF session |
| 333 | * @param prefix Name of a XML element prefix to use. Can be meaningless, such as "M" |
| 334 | * @param namespace Full URI of the XML namespace to use. This is the real meat. |
| 335 | * @param xpathFilter String with a relative XPath filter. This *MUST* start with "/" followed by 'prefix' and ":". |
| 336 | * @return Result of the <get/> operation via NETCONF as a XmlHierarchicalConfiguration |
| 337 | * @throws NetconfException exactly as session.doWrappedRpc() would do. |
| 338 | * */ |
| 339 | public static HierarchicalConfiguration doGetXPath(final NetconfSession session, final String prefix, |
| 340 | final String namespace, final String xpathFilter) |
| 341 | throws NetconfException { |
| 342 | final var reply = session.doWrappedRpc("<get xmlns=\"urn:ietf:params:xml:ns:netconf:base:1.0\">" |
| 343 | + "<filter type=\"xpath\" xmlns:" + prefix + "=\"" + namespace + "\"" |
| 344 | + " select=\"" + xpathFilter.replace("\"", """) + "\"/>" |
| 345 | + "</get>"); |
| 346 | log.debug("GET RPC w/XPath {}", reply); |
| 347 | var data = XmlConfigParser.loadXmlString(reply); |
| 348 | if (!data.containsKey("data[@xmlns]")) { |
| 349 | log.error("NETCONF <get> w/XPath returned error: {}", reply); |
| 350 | return null; |
| 351 | } |
| 352 | return data; |
| 353 | } |
| 354 | |
| 355 | public static HierarchicalConfiguration doGetSubtree(final NetconfSession session, final String subtreeXml) |
| 356 | throws NetconfException { |
| 357 | final var data = XmlConfigParser.loadXmlString(session.getConfig(DatastoreId.RUNNING, subtreeXml)); |
| 358 | if (!data.containsKey("data[@xmlns]")) { |
| 359 | log.error("NETCONF <get> w/subtree returned error"); |
| 360 | return null; |
| 361 | } |
| 362 | return data; |
| 363 | } |
| 364 | |
| 365 | /** Massage an XPath fragment (without the "/module:" prefix) into a key suitable for XmlConfigParser.getString() |
| 366 | * |
| 367 | * This might or might not work properly for various corner cases. It will fail horribly when XML namespaces are not |
| 368 | * being done in exactly the same manner as the author of this code assumed was the case. |
| 369 | * |
| 370 | * @param xpath XPath subset without the "/module:" prefix, such as "container/another-container/leaf" |
| 371 | * @return a string to be passed to XmlConfigParser.getString(...) of the XmlHierarchicalConfiguration |
| 372 | * */ |
| 373 | public static String xpathToXmlKey(final String xpath) { |
| 374 | return "data." // prefix added by RPC handling |
| 375 | // turn XPath level delimiters into XmlConfigParser's key format |
| 376 | + xpath.replace('/', '.') |
| 377 | // filter out XPath list keys/selectors, they are not visible in XmlConfigParser |
| 378 | .replaceAll("\\[[^]]*\\]", ""); |
| 379 | } |
| 380 | |
| 381 | } |