aboutsummaryrefslogtreecommitdiffstats
path: root/tools/pkt_gen/ixnet/ixnet.py
blob: 96936e14b65730f7cc2729d7116a81fdc2e78366 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
# Copyright 2015-2016 Intel Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""IxNetwork traffic generator model.

Provides a model for an IxNetwork machine and appropriate applications.

This requires the following settings in your config file:

* TRAFFICGEN_IXNET_LIB_PATH
    IxNetwork libraries path
* TRAFFICGEN_IXNET_HOST
    IxNetwork host IP address
* TRAFFICGEN_IXNET_PORT
    IxNetwork host port number
* TRAFFICGEN_IXNET_USER
    IxNetwork host user name
* TRAFFICGEN_IXNET_TESTER_RESULT_DIR
    The result directory on the IxNetwork computer
* TRAFFICGEN_IXNET_DUT_RESULT_DIR
    The result directory on DUT. This needs to map to the same directory
    as the previous one

The following settings are also required. These can likely be shared
an 'Ixia' traffic generator instance:

* TRAFFICGEN_IXIA_HOST
    IXIA chassis IP address
* TRAFFICGEN_IXIA_CARD
    IXIA card
* TRAFFICGEN_IXIA_PORT1
    IXIA Tx port
* TRAFFICGEN_IXIA_PORT2
    IXIA Rx port

If any of these don't exist, the application will raise an exception
(EAFP).

Additional Configuration:
-------------------------

You will also need to configure the IxNetwork machine to start the IXIA
IxNetworkTclServer. This can be started like so:

1. Connect to the IxNetwork machine using RDP
2. Go to:

    Start->
      Programs ->
        Ixia ->
          IxNetwork ->
            IxNetwork 7.21.893.14 GA ->
              IxNetworkTclServer

   Pin a shortcut to this application to the taskbar.
3. Before running it right click the pinned shortcut  and go to
   "Properties". Here change the port number to your own port number.
   This will be the same value as "TRAFFICGEN_IXNET_PORT" above.
4. You will find this on the shortcut tab under the heading "Target"
5. Finally run it. If you see the following error check that you
   followed the above steps exactly:

       ERROR: couldn't open socket : connection refused

Debugging:
----------

This method of automation is quite error prone as the IxNetwork API
does not give any feedback as to the status of tests. As such, it can
be expected that the user have access to the IxNetwork machine should
this trafficgen need to be debugged.
"""

import tkinter
import logging
import os
import re
import csv

from collections import OrderedDict
from tools.pkt_gen import trafficgen
from conf import settings
from core.results.results_constants import ResultsConstants

_ROOT_DIR = os.path.dirname(os.path.realpath(__file__))

_RESULT_RE = r'(?:\{kString,result\},\{kString,)(\w+)(?:\})'
_RESULTPATH_RE = r'(?:\{kString,resultPath\},\{kString,)([\\\w\.\-\:]+)(?:\})'


def _build_set_cmds(values, prefix='dict set'):
    """Generate a list of 'dict set' args for Tcl.

    Parse a dictionary and recursively build the arguments for the
    'dict set' Tcl command, given that this is of the format:

        dict set [name...] [key] [value]

    For example, for a non-nested dict (i.e. a non-dict element):

        dict set mydict mykey myvalue

    For a nested dict (i.e. a dict element):

        dict set mydict mysubdict mykey myvalue

    :param values: Dictionary to yield values for
    :param prefix: Prefix to append to output string. Generally the
        already generated part of the command.

    :yields: Output strings to be passed to a `Tcl` instance.
    """
    for key in values:
        value = values[key]

        # Not allowing derived dictionary types for now
        # pylint: disable=unidiomatic-typecheck
        if type(value) == dict:
            _prefix = ' '.join([prefix, key]).strip()
            for subkey in _build_set_cmds(value, _prefix):
                yield subkey
            continue

        # pylint: disable=unidiomatic-typecheck
        # tcl doesn't recognise the strings "True" or "False", only "1"
        # or "0". Special case to convert them
        if type(value) == bool:
            value = str(int(value))
        else:
            value = str(value)

        if prefix:
            yield ' '.join([prefix, key, value]).strip()
        else:
            yield ' '.join([key, value]).strip()


class IxNet(trafficgen.ITrafficGenerator):
    """A wrapper around IXIA IxNetwork applications.

    Runs different traffic generator tests through an Ixia traffic
    generator chassis by generating TCL scripts from templates.

    Currently only the RFC2544 tests are implemented.
    """
    if settings.getValue('TRAFFICGEN_IXNET_TCL_SCRIPT') == '':
        _script = os.path.join(os.path.dirname(__file__), 'ixnetrfc2544.tcl')
    else:
        _script = os.path.join(os.path.dirname(__file__),
                               settings.getValue('TRAFFICGEN_IXNET_TCL_SCRIPT'))
    _tclsh = tkinter.Tcl()
    _cfg = None
    _logger = logging.getLogger(__name__)
    _params = None
    _bidir = None

    def run_tcl(self, cmd):
        """Run a TCL script using the TCL interpreter found in ``tkinter``.

        :param cmd: Command to execute

        :returns: Output of command, where applicable.
        """
        self._logger.debug('%s%s', trafficgen.CMD_PREFIX, cmd)

        output = self._tclsh.eval(cmd)

        return output.split()

    def connect(self):
        """Configure system for IxNetwork.
        """
        self._cfg = {
            'lib_path': settings.getValue('TRAFFICGEN_IXNET_LIB_PATH'),
            # IxNetwork machine configuration
            'machine': settings.getValue('TRAFFICGEN_IXNET_MACHINE'),
            'port': settings.getValue('TRAFFICGEN_IXNET_PORT'),
            'user': settings.getValue('TRAFFICGEN_IXNET_USER'),
            # IXIA chassis configuration
            'chassis': settings.getValue('TRAFFICGEN_IXIA_HOST'),
            'card': settings.getValue('TRAFFICGEN_IXIA_CARD'),
            'port1': settings.getValue('TRAFFICGEN_IXIA_PORT1'),
            'port2': settings.getValue('TRAFFICGEN_IXIA_PORT2'),
            'output_dir':
                settings.getValue('TRAFFICGEN_IXNET_TESTER_RESULT_DIR'),
        }

        self._logger.debug('IXIA configuration configuration : %s', self._cfg)

        return self

    def disconnect(self):
        """Disconnect from Ixia chassis.
        """
        pass

    def send_cont_traffic(self, traffic=None, duration=30, multistream=False):
        """See ITrafficGenerator for description
        """
        self.start_cont_traffic(traffic, duration)

        return self.stop_cont_traffic()

    def start_cont_traffic(self, traffic=None, duration=30):
        """Start transmission.
        """
        self._bidir = traffic['bidir']
        self._params = {}

        self._params['config'] = {
            'binary': False,  # don't do binary search and send one stream
            'duration': duration,
            'framerate': traffic['frame_rate'],
            'multipleStreams': traffic['multistream'],
            'streamType': traffic['stream_type'],
            'rfc2544TestType': 'throughput',
        }
        self._params['traffic'] = self.traffic_defaults.copy()

        if traffic:
            self._params['traffic'] = trafficgen.merge_spec(
                self._params['traffic'], traffic)
        self._cfg['bidir'] = self._bidir

        for cmd in _build_set_cmds(self._cfg, prefix='set'):
            self.run_tcl(cmd)

        for cmd in _build_set_cmds(self._params):
            self.run_tcl(cmd)

        output = self.run_tcl('source {%s}' % self._script)
        if output:
            self._logger.critical(
                'An error occured when connecting to IxNetwork machine...')
            raise RuntimeError('Ixia failed to initialise.')

        self.run_tcl('startRfc2544Test $config $traffic')
        if output:
            self._logger.critical(
                'Failed to start continuous traffic test')
            raise RuntimeError('Continuous traffic test failed to start.')

    def stop_cont_traffic(self):
        """See ITrafficGenerator for description
        """
        return self._wait_result()

    def send_rfc2544_throughput(self, traffic=None, trials=3, duration=20,
                                lossrate=0.0, multistream=False):
        """See ITrafficGenerator for description
        """
        self.start_rfc2544_throughput(traffic, trials, duration, lossrate)

        return self.wait_rfc2544_throughput()

    def start_rfc2544_throughput(self, traffic=None, trials=3, duration=20,
                                 lossrate=0.0):
        """Start transmission.
        """
        self._bidir = traffic['bidir']
        self._params = {}

        self._params['config'] = {
            'binary': True,
            'trials': trials,
            'duration': duration,
            'lossrate': lossrate,
            'multipleStreams': traffic['multistream'],
            'streamType': traffic['stream_type'],
            'rfc2544TestType': 'throughput',
        }
        self._params['traffic'] = self.traffic_defaults.copy()

        if traffic:
            self._params['traffic'] = trafficgen.merge_spec(
                self._params['traffic'], traffic)
        self._cfg['bidir'] = self._bidir

        for cmd in _build_set_cmds(self._cfg, prefix='set'):
            self.run_tcl(cmd)

        for cmd in _build_set_cmds(self._params):
            self.run_tcl(cmd)

        output = self.run_tcl('source {%s}' % self._script)
        if output:
            self._logger.critical(
                'An error occured when connecting to IxNetwork machine...')
            raise RuntimeError('Ixia failed to initialise.')

        self.run_tcl('startRfc2544Test $config $traffic')
        if output:
            self._logger.critical(
                'Failed to start RFC2544 test')
            raise RuntimeError('RFC2544 test failed to start.')

    def wait_rfc2544_throughput(self):
        """See ITrafficGenerator for description
        """
        return self._wait_result()

    def _wait_result(self):
        """Wait for results.
        """
        def parse_result_string(results):
            """Get path to results file from output

            Check for related errors

            :param results: Text stream from test.

            :returns: Path to results file.
            """
            result_status = re.search(_RESULT_RE, results)
            result_path = re.search(_RESULTPATH_RE, results)

            if not result_status or not result_path:
                self._logger.critical(
                    'Could not parse results from IxNetwork machine...')
                raise ValueError('Failed to parse output.')

            if result_status.group(1) != 'pass':
                self._logger.critical(
                    'An error occured when running tests...')
                raise RuntimeError('Ixia failed to initialise.')

            # transform path into someting useful

            path = result_path.group(1).replace('\\', '/')
            path = os.path.join(path, 'AggregateResults.csv')
            path = path.replace(
                settings.getValue('TRAFFICGEN_IXNET_TESTER_RESULT_DIR'),
                settings.getValue('TRAFFICGEN_IXNET_DUT_RESULT_DIR'))
            return path

        def parse_ixnet_rfc_results(path):
            """Parse CSV output of IxNet RFC2544 test run.

            :param path: Input file path
            """
            results = OrderedDict()

            with open(path, 'r') as in_file:
                reader = csv.reader(in_file, delimiter=',')
                next(reader)
                for row in reader:
                    #Replace null entries added by Ixia with 0s.
                    row = [entry if len(entry) > 0 else '0' for entry in row]

                    # tx_fps and tx_mps cannot be reliably calculated
                    # as the DUT may be modifying the frame size
                    tx_fps = 'Unknown'
                    tx_mbps = 'Unknown'

                    if bool(results.get(ResultsConstants.THROUGHPUT_RX_FPS)) \
                                                                is False:
                        prev_percent_rx = 0.0
                    else:
                        prev_percent_rx = \
                        float(results.get(ResultsConstants.THROUGHPUT_RX_FPS))
                    if float(row[5]) >= prev_percent_rx:
                        results[ResultsConstants.TX_RATE_FPS] = tx_fps
                        results[ResultsConstants.THROUGHPUT_RX_FPS] = row[5]
                        results[ResultsConstants.TX_RATE_MBPS] = tx_mbps
                        results[ResultsConstants.THROUGHPUT_RX_MBPS] = row[6]
                        results[ResultsConstants.TX_RATE_PERCENT] = row[3]
                        results[ResultsConstants.THROUGHPUT_RX_PERCENT] = row[4]
                        results[ResultsConstants.MIN_LATENCY_NS] = row[11]
                        results[ResultsConstants.MAX_LATENCY_NS] = row[12]
                        results[ResultsConstants.AVG_LATENCY_NS] = row[13]
            return results

        output = self.run_tcl('waitForRfc2544Test')

        # the run_tcl function will return a list with one element. We extract
        # that one element (a string representation of an IXIA-specific Tcl
        # datatype), parse it to find the path of the results file then parse
        # the results file
        return parse_ixnet_rfc_results(parse_result_string(output[0]))

    def send_rfc2544_back2back(self, traffic=None, trials=50, duration=2,
                               lossrate=0.0):
        """See ITrafficGenerator for description
        """
        # NOTE 2 seconds is the recommended duration for a back 2 back
        # test in RFC2544. 50 trials is the recommended number from the
        # RFC also.
        self.start_rfc2544_back2back(traffic, trials, duration, lossrate)

        return self.wait_rfc2544_back2back()

    def start_rfc2544_back2back(self, traffic=None, trials=50, duration=2,
                                lossrate=0.0):
        """Start transmission.
        """
        self._bidir = traffic['bidir']
        self._params = {}

        self._params['config'] = {
            'binary': True,
            'trials': trials,
            'duration': duration,
            'lossrate': lossrate,
            'multipleStreams': traffic['multistream'],
            'streamType': traffic['stream_type'],
            'rfc2544TestType': 'back2back',
        }
        self._params['traffic'] = self.traffic_defaults.copy()

        if traffic:
            self._params['traffic'] = trafficgen.merge_spec(
                self._params['traffic'], traffic)
        self._cfg['bidir'] = self._bidir

        for cmd in _build_set_cmds(self._cfg, prefix='set'):
            self.run_tcl(cmd)

        for cmd in _build_set_cmds(self._params):
            self.run_tcl(cmd)

        output = self.run_tcl('source {%s}' % self._script)
        if output:
            self._logger.critical(
                'An error occured when connecting to IxNetwork machine...')
            raise RuntimeError('Ixia failed to initialise.')

        self.run_tcl('startRfc2544Test $config $traffic')
        if output:
            self._logger.critical(
                'Failed to start RFC2544 test')
            raise RuntimeError('RFC2544 test failed to start.')

    def wait_rfc2544_back2back(self):
        """Wait for results.
        """
        def parse_result_string(results):
            """Get path to results file from output

            Check for related errors

            :param results: Text stream from test.

            :returns: Path to results file.
            """
            result_status = re.search(_RESULT_RE, results)
            result_path = re.search(_RESULTPATH_RE, results)

            if not result_status or not result_path:
                self._logger.critical(
                    'Could not parse results from IxNetwork machine...')
                raise ValueError('Failed to parse output.')

            if result_status.group(1) != 'pass':
                self._logger.critical(
                    'An error occured when running tests...')
                raise RuntimeError('Ixia failed to initialise.')

            # transform path into something useful

            path = result_path.group(1).replace('\\', '/')
            path = os.path.join(path, 'iteration.csv')
            path = path.replace(
                settings.getValue('TRAFFICGEN_IXNET_TESTER_RESULT_DIR'),
                settings.getValue('TRAFFICGEN_IXNET_DUT_RESULT_DIR'))

            return path

        def parse_ixnet_rfc_results(path):
            """Parse CSV output of IxNet RFC2544 Back2Back test run.

            :param path: Input file path

            :returns: Best parsed result from CSV file.
            """
            results = OrderedDict()
            results[ResultsConstants.B2B_FRAMES] = 0

            with open(path, 'r') as in_file:
                reader = csv.reader(in_file, delimiter=',')
                next(reader)
                for row in reader:
                    # if back2back count higher than previously found, store it
                    # Note: row[N] here refers to the Nth column of a row
                    if float(row[14]) <= self._params['config']['lossrate']:
                        if int(row[12]) > \
                         int(results[ResultsConstants.B2B_FRAMES]):
                            results[ResultsConstants.B2B_FRAMES] = int(row[12])

            return results

        output = self.run_tcl('waitForRfc2544Test')

        # the run_tcl function will return a list with one element. We extract
        # that one element (a string representation of an IXIA-specific Tcl
        # datatype), parse it to find the path of the results file then parse
        # the results file

        return parse_ixnet_rfc_results(parse_result_string(output[0]))


if __name__ == '__main__':
    TRAFFIC = {
        'l3': {
            'proto': 'udp',
            'srcip': '10.1.1.1',
            'dstip': '10.1.1.254',
        },
    }

    with IxNet() as dev:
        print(dev.send_cont_traffic())
        print(dev.send_rfc2544_throughput())