tools/pkt_gen/ixnet/ixnet.py

   1 # Copyright 2015-2016 Intel Corporation.
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # 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
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14 """IxNetwork traffic generator model.
  15
  16 Provides a model for an IxNetwork machine and appropriate applications.
  17
  18 This requires the following settings in your config file:
  19
  20 * TRAFFICGEN_IXNET_LIB_PATH
  21     IxNetwork libraries path
  22 * TRAFFICGEN_IXNET_HOST
  23     IxNetwork host IP address
  24 * TRAFFICGEN_IXNET_PORT
  25     IxNetwork host port number
  26 * TRAFFICGEN_IXNET_USER
  27     IxNetwork host user name
  28 * TRAFFICGEN_IXNET_TESTER_RESULT_DIR
  29     The result directory on the IxNetwork computer
  30 * TRAFFICGEN_IXNET_DUT_RESULT_DIR
  31     The result directory on DUT. This needs to map to the same directory
  32     as the previous one
  33
  34 The following settings are also required. These can likely be shared
  35 an 'Ixia' traffic generator instance:
  36
  37 * TRAFFICGEN_IXIA_HOST
  38     IXIA chassis IP address
  39 * TRAFFICGEN_IXIA_CARD
  40     IXIA card
  41 * TRAFFICGEN_IXIA_PORT1
  42     IXIA Tx port
  43 * TRAFFICGEN_IXIA_PORT2
  44     IXIA Rx port
  45
  46 If any of these don't exist, the application will raise an exception
  47 (EAFP).
  48
  49 Additional Configuration:
  50 -------------------------
  51
  52 You will also need to configure the IxNetwork machine to start the IXIA
  53 IxNetworkTclServer. This can be started like so:
  54
  55 1. Connect to the IxNetwork machine using RDP
  56 2. Go to:
  57
  58     Start->
  59       Programs ->
  60         Ixia ->
  61           IxNetwork ->
  62             IxNetwork 7.21.893.14 GA ->
  63               IxNetworkTclServer
  64
  65    Pin a shortcut to this application to the taskbar.
  66 3. Before running it right click the pinned shortcut  and go to
  67    "Properties". Here change the port number to your own port number.
  68    This will be the same value as "TRAFFICGEN_IXNET_PORT" above.
  69 4. You will find this on the shortcut tab under the heading "Target"
  70 5. Finally run it. If you see the following error check that you
  71    followed the above steps exactly:
  72
  73        ERROR: couldn't open socket : connection refused
  74
  75 Debugging:
  76 ----------
  77
  78 This method of automation is quite error prone as the IxNetwork API
  79 does not give any feedback as to the status of tests. As such, it can
  80 be expected that the user have access to the IxNetwork machine should
  81 this trafficgen need to be debugged.
  82 """
  83
  84 import tkinter
  85 import logging
  86 import os
  87 import re
  88 import csv
  89
  90 from collections import OrderedDict
  91 from tools.pkt_gen import trafficgen
  92 from conf import settings
  93 from core.results.results_constants import ResultsConstants
  94
  95 _ROOT_DIR = os.path.dirname(os.path.realpath(__file__))
  96
  97 _RESULT_RE = r'(?:\{kString,result\},\{kString,)(\w+)(?:\})'
  98 _RESULTPATH_RE = r'(?:\{kString,resultPath\},\{kString,)([\\\w\.\-\:]+)(?:\})'
  99
 100
 101 def _build_set_cmds(values, prefix='dict set'):
 102     """Generate a list of 'dict set' args for Tcl.
 103
 104     Parse a dictionary and recursively build the arguments for the
 105     'dict set' Tcl command, given that this is of the format:
 106
 107         dict set [name...] [key] [value]
 108
 109     For example, for a non-nested dict (i.e. a non-dict element):
 110
 111         dict set mydict mykey myvalue
 112
 113     For a nested dict (i.e. a dict element):
 114
 115         dict set mydict mysubdict mykey myvalue
 116
 117     :param values: Dictionary to yield values for
 118     :param prefix: Prefix to append to output string. Generally the
 119         already generated part of the command.
 120
 121     :yields: Output strings to be passed to a `Tcl` instance.
 122     """
 123     for key in values:
 124         value = values[key]
 125
 126         # Not allowing derived dictionary types for now
 127         # pylint: disable=unidiomatic-typecheck
 128         if type(value) == dict:
 129             _prefix = ' '.join([prefix, key]).strip()
 130             for subkey in _build_set_cmds(value, _prefix):
 131                 yield subkey
 132             continue
 133
 134         # pylint: disable=unidiomatic-typecheck
 135         # tcl doesn't recognise the strings "True" or "False", only "1"
 136         # or "0". Special case to convert them
 137         if type(value) == bool:
 138             value = str(int(value))
 139         else:
 140             value = str(value)
 141
 142         if prefix:
 143             yield ' '.join([prefix, key, value]).strip()
 144         else:
 145             yield ' '.join([key, value]).strip()
 146
 147
 148 class IxNet(trafficgen.ITrafficGenerator):
 149     """A wrapper around IXIA IxNetwork applications.
 150
 151     Runs different traffic generator tests through an Ixia traffic
 152     generator chassis by generating TCL scripts from templates.
 153
 154     Currently only the RFC2544 tests are implemented.
 155     """
 156     if settings.getValue('TRAFFICGEN_IXNET_TCL_SCRIPT') == '':
 157         _script = os.path.join(os.path.dirname(__file__), 'ixnetrfc2544.tcl')
 158     else:
 159         _script = os.path.join(os.path.dirname(__file__),
 160                                settings.getValue('TRAFFICGEN_IXNET_TCL_SCRIPT'))
 161     _tclsh = tkinter.Tcl()
 162     _cfg = None
 163     _logger = logging.getLogger(__name__)
 164     _params = None
 165     _bidir = None
 166
 167     def run_tcl(self, cmd):
 168         """Run a TCL script using the TCL interpreter found in ``tkinter``.
 169
 170         :param cmd: Command to execute
 171
 172         :returns: Output of command, where applicable.
 173         """
 174         self._logger.debug('%s%s', trafficgen.CMD_PREFIX, cmd)
 175
 176         output = self._tclsh.eval(cmd)
 177
 178         return output.split()
 179
 180     def connect(self):
 181         """Configure system for IxNetwork.
 182         """
 183         self._cfg = {
 184             'lib_path': settings.getValue('TRAFFICGEN_IXNET_LIB_PATH'),
 185             # IxNetwork machine configuration
 186             'machine': settings.getValue('TRAFFICGEN_IXNET_MACHINE'),
 187             'port': settings.getValue('TRAFFICGEN_IXNET_PORT'),
 188             'user': settings.getValue('TRAFFICGEN_IXNET_USER'),
 189             # IXIA chassis configuration
 190             'chassis': settings.getValue('TRAFFICGEN_IXIA_HOST'),
 191             'card': settings.getValue('TRAFFICGEN_IXIA_CARD'),
 192             'port1': settings.getValue('TRAFFICGEN_IXIA_PORT1'),
 193             'port2': settings.getValue('TRAFFICGEN_IXIA_PORT2'),
 194             'output_dir':
 195                 settings.getValue('TRAFFICGEN_IXNET_TESTER_RESULT_DIR'),
 196         }
 197
 198         self._logger.debug('IXIA configuration configuration : %s', self._cfg)
 199
 200         return self
 201
 202     def disconnect(self):
 203         """Disconnect from Ixia chassis.
 204         """
 205         pass
 206
 207     def send_cont_traffic(self, traffic=None, duration=30):
 208         """See ITrafficGenerator for description
 209         """
 210         self.start_cont_traffic(traffic, duration)
 211
 212         return self.stop_cont_traffic()
 213
 214     def start_cont_traffic(self, traffic=None, duration=30):
 215         """Start transmission.
 216         """
 217         self._bidir = traffic['bidir']
 218         self._params = {}
 219
 220         self._params['config'] = {
 221             'binary': False,  # don't do binary search and send one stream
 222             'duration': duration,
 223             'framerate': traffic['frame_rate'],
 224             'multipleStreams': traffic['multistream'],
 225             'streamType': traffic['stream_type'],
 226             'rfc2544TestType': 'throughput',
 227         }
 228         self._params['traffic'] = self.traffic_defaults.copy()
 229
 230         if traffic:
 231             self._params['traffic'] = trafficgen.merge_spec(
 232                 self._params['traffic'], traffic)
 233         self._cfg['bidir'] = self._bidir
 234
 235         for cmd in _build_set_cmds(self._cfg, prefix='set'):
 236             self.run_tcl(cmd)
 237
 238         for cmd in _build_set_cmds(self._params):
 239             self.run_tcl(cmd)
 240
 241         output = self.run_tcl('source {%s}' % self._script)
 242         if output:
 243             self._logger.critical(
 244                 'An error occured when connecting to IxNetwork machine...')
 245             raise RuntimeError('Ixia failed to initialise.')
 246
 247         self.run_tcl('startRfc2544Test $config $traffic')
 248         if output:
 249             self._logger.critical(
 250                 'Failed to start continuous traffic test')
 251             raise RuntimeError('Continuous traffic test failed to start.')
 252
 253     def stop_cont_traffic(self):
 254         """See ITrafficGenerator for description
 255         """
 256         return self._wait_result()
 257
 258     def send_rfc2544_throughput(self, traffic=None, trials=3, duration=20,
 259                                 lossrate=0.0):
 260         """See ITrafficGenerator for description
 261         """
 262         self.start_rfc2544_throughput(traffic, trials, duration, lossrate)
 263
 264         return self.wait_rfc2544_throughput()
 265
 266     def start_rfc2544_throughput(self, traffic=None, trials=3, duration=20,
 267                                  lossrate=0.0):
 268         """Start transmission.
 269         """
 270         self._bidir = traffic['bidir']
 271         self._params = {}
 272
 273         self._params['config'] = {
 274             'binary': True,
 275             'trials': trials,
 276             'duration': duration,
 277             'lossrate': lossrate,
 278             'multipleStreams': traffic['multistream'],
 279             'streamType': traffic['stream_type'],
 280             'rfc2544TestType': 'throughput',
 281         }
 282         self._params['traffic'] = self.traffic_defaults.copy()
 283
 284         if traffic:
 285             self._params['traffic'] = trafficgen.merge_spec(
 286                 self._params['traffic'], traffic)
 287         self._cfg['bidir'] = self._bidir
 288
 289         for cmd in _build_set_cmds(self._cfg, prefix='set'):
 290             self.run_tcl(cmd)
 291
 292         for cmd in _build_set_cmds(self._params):
 293             self.run_tcl(cmd)
 294
 295         output = self.run_tcl('source {%s}' % self._script)
 296         if output:
 297             self._logger.critical(
 298                 'An error occured when connecting to IxNetwork machine...')
 299             raise RuntimeError('Ixia failed to initialise.')
 300
 301         self.run_tcl('startRfc2544Test $config $traffic')
 302         if output:
 303             self._logger.critical(
 304                 'Failed to start RFC2544 test')
 305             raise RuntimeError('RFC2544 test failed to start.')
 306
 307     def wait_rfc2544_throughput(self):
 308         """See ITrafficGenerator for description
 309         """
 310         return self._wait_result()
 311
 312     def _wait_result(self):
 313         """Wait for results.
 314         """
 315         def parse_result_string(results):
 316             """Get path to results file from output
 317
 318             Check for related errors
 319
 320             :param results: Text stream from test.
 321
 322             :returns: Path to results file.
 323             """
 324             result_status = re.search(_RESULT_RE, results)
 325             result_path = re.search(_RESULTPATH_RE, results)
 326
 327             if not result_status or not result_path:
 328                 self._logger.critical(
 329                     'Could not parse results from IxNetwork machine...')
 330                 raise ValueError('Failed to parse output.')
 331
 332             if result_status.group(1) != 'pass':
 333                 self._logger.critical(
 334                     'An error occured when running tests...')
 335                 raise RuntimeError('Ixia failed to initialise.')
 336
 337             # transform path into someting useful
 338
 339             path = result_path.group(1).replace('\\', '/')
 340             path = os.path.join(path, 'AggregateResults.csv')
 341             path = path.replace(
 342                 settings.getValue('TRAFFICGEN_IXNET_TESTER_RESULT_DIR'),
 343                 settings.getValue('TRAFFICGEN_IXNET_DUT_RESULT_DIR'))
 344             return path
 345
 346         def parse_ixnet_rfc_results(path):
 347             """Parse CSV output of IxNet RFC2544 test run.
 348
 349             :param path: Input file path
 350             """
 351             results = OrderedDict()
 352
 353             with open(path, 'r') as in_file:
 354                 reader = csv.reader(in_file, delimiter=',')
 355                 next(reader)
 356                 for row in reader:
 357                     #Replace null entries added by Ixia with 0s.
 358                     row = [entry if len(entry) > 0 else '0' for entry in row]
 359
 360                     # tx_fps and tx_mps cannot be reliably calculated
 361                     # as the DUT may be modifying the frame size
 362                     tx_fps = 'Unknown'
 363                     tx_mbps = 'Unknown'
 364
 365                     if bool(results.get(ResultsConstants.THROUGHPUT_RX_FPS)) \
 366                                                                 is False:
 367                         prev_percent_rx = 0.0
 368                     else:
 369                         prev_percent_rx = \
 370                         float(results.get(ResultsConstants.THROUGHPUT_RX_FPS))
 371                     if float(row[5]) >= prev_percent_rx:
 372                         results[ResultsConstants.TX_RATE_FPS] = tx_fps
 373                         results[ResultsConstants.THROUGHPUT_RX_FPS] = row[5]
 374                         results[ResultsConstants.TX_RATE_MBPS] = tx_mbps
 375                         results[ResultsConstants.THROUGHPUT_RX_MBPS] = row[6]
 376                         results[ResultsConstants.TX_RATE_PERCENT] = row[3]
 377                         results[ResultsConstants.THROUGHPUT_RX_PERCENT] = row[4]
 378                         results[ResultsConstants.FRAME_LOSS_PERCENT] = row[10]
 379                         results[ResultsConstants.MIN_LATENCY_NS] = row[11]
 380                         results[ResultsConstants.MAX_LATENCY_NS] = row[12]
 381                         results[ResultsConstants.AVG_LATENCY_NS] = row[13]
 382             return results
 383
 384         output = self.run_tcl('waitForRfc2544Test')
 385
 386         # the run_tcl function will return a list with one element. We extract
 387         # that one element (a string representation of an IXIA-specific Tcl
 388         # datatype), parse it to find the path of the results file then parse
 389         # the results file
 390         return parse_ixnet_rfc_results(parse_result_string(output[0]))
 391
 392     def send_rfc2544_back2back(self, traffic=None, trials=50, duration=2,
 393                                lossrate=0.0):
 394         """See ITrafficGenerator for description
 395         """
 396         # NOTE 2 seconds is the recommended duration for a back 2 back
 397         # test in RFC2544. 50 trials is the recommended number from the
 398         # RFC also.
 399         self.start_rfc2544_back2back(traffic, trials, duration, lossrate)
 400
 401         return self.wait_rfc2544_back2back()
 402
 403     def start_rfc2544_back2back(self, traffic=None, trials=50, duration=2,
 404                                 lossrate=0.0):
 405         """Start transmission.
 406         """
 407         self._bidir = traffic['bidir']
 408         self._params = {}
 409
 410         self._params['config'] = {
 411             'binary': True,
 412             'trials': trials,
 413             'duration': duration,
 414             'lossrate': lossrate,
 415             'multipleStreams': traffic['multistream'],
 416             'streamType': traffic['stream_type'],
 417             'rfc2544TestType': 'back2back',
 418         }
 419         self._params['traffic'] = self.traffic_defaults.copy()
 420
 421         if traffic:
 422             self._params['traffic'] = trafficgen.merge_spec(
 423                 self._params['traffic'], traffic)
 424         self._cfg['bidir'] = self._bidir
 425
 426         for cmd in _build_set_cmds(self._cfg, prefix='set'):
 427             self.run_tcl(cmd)
 428
 429         for cmd in _build_set_cmds(self._params):
 430             self.run_tcl(cmd)
 431
 432         output = self.run_tcl('source {%s}' % self._script)
 433         if output:
 434             self._logger.critical(
 435                 'An error occured when connecting to IxNetwork machine...')
 436             raise RuntimeError('Ixia failed to initialise.')
 437
 438         self.run_tcl('startRfc2544Test $config $traffic')
 439         if output:
 440             self._logger.critical(
 441                 'Failed to start RFC2544 test')
 442             raise RuntimeError('RFC2544 test failed to start.')
 443
 444     def wait_rfc2544_back2back(self):
 445         """Wait for results.
 446         """
 447         def parse_result_string(results):
 448             """Get path to results file from output
 449
 450             Check for related errors
 451
 452             :param results: Text stream from test.
 453
 454             :returns: Path to results file.
 455             """
 456             result_status = re.search(_RESULT_RE, results)
 457             result_path = re.search(_RESULTPATH_RE, results)
 458
 459             if not result_status or not result_path:
 460                 self._logger.critical(
 461                     'Could not parse results from IxNetwork machine...')
 462                 raise ValueError('Failed to parse output.')
 463
 464             if result_status.group(1) != 'pass':
 465                 self._logger.critical(
 466                     'An error occured when running tests...')
 467                 raise RuntimeError('Ixia failed to initialise.')
 468
 469             # transform path into something useful
 470
 471             path = result_path.group(1).replace('\\', '/')
 472             path = os.path.join(path, 'iteration.csv')
 473             path = path.replace(
 474                 settings.getValue('TRAFFICGEN_IXNET_TESTER_RESULT_DIR'),
 475                 settings.getValue('TRAFFICGEN_IXNET_DUT_RESULT_DIR'))
 476
 477             return path
 478
 479         def parse_ixnet_rfc_results(path):
 480             """Parse CSV output of IxNet RFC2544 Back2Back test run.
 481
 482             :param path: Input file path
 483
 484             :returns: Best parsed result from CSV file.
 485             """
 486             results = OrderedDict()
 487             results[ResultsConstants.B2B_FRAMES] = 0
 488             results[ResultsConstants.B2B_FRAME_LOSS_PERCENT] = 100
 489
 490             with open(path, 'r') as in_file:
 491                 reader = csv.reader(in_file, delimiter=',')
 492                 next(reader)
 493                 for row in reader:
 494                     # if back2back count higher than previously found, store it
 495                     # Note: row[N] here refers to the Nth column of a row
 496                     if float(row[14]) <= self._params['config']['lossrate']:
 497                         if int(row[12]) > \
 498                          int(results[ResultsConstants.B2B_FRAMES]):
 499                             results[ResultsConstants.B2B_FRAMES] = int(row[12])
 500                             results[ResultsConstants.B2B_FRAME_LOSS_PERCENT] = float(row[14])
 501
 502             return results
 503
 504         output = self.run_tcl('waitForRfc2544Test')
 505
 506         # the run_tcl function will return a list with one element. We extract
 507         # that one element (a string representation of an IXIA-specific Tcl
 508         # datatype), parse it to find the path of the results file then parse
 509         # the results file
 510
 511         return parse_ixnet_rfc_results(parse_result_string(output[0]))
 512
 513
 514 if __name__ == '__main__':
 515     TRAFFIC = {
 516         'l3': {
 517             'proto': 'udp',
 518             'srcip': '10.1.1.1',
 519             'dstip': '10.1.1.254',
 520         },
 521     }
 522
 523     with IxNet() as dev:
 524         print(dev.send_cont_traffic())
 525         print(dev.send_rfc2544_throughput())