forked from FRRouting/topotests
-
Notifications
You must be signed in to change notification settings - Fork 0
/
topotest.py
802 lines (714 loc) · 30.9 KB
/
topotest.py
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
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
#!/usr/bin/env python
#
# topotest.py
# Library of helper functions for NetDEF Topology Tests
#
# Copyright (c) 2016 by
# Network Device Education Foundation, Inc. ("NetDEF")
#
# Permission to use, copy, modify, and/or distribute this software
# for any purpose with or without fee is hereby granted, provided
# that the above copyright notice and this permission notice appear
# in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
# OF THIS SOFTWARE.
#
import json
import os
import errno
import re
import sys
import glob
import StringIO
import subprocess
import tempfile
import platform
import difflib
import time
from lib.topolog import logger
from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import Node, OVSSwitch, Host
from mininet.log import setLogLevel, info
from mininet.cli import CLI
from mininet.link import Intf
class json_cmp_result(object):
"json_cmp result class for better assertion messages"
def __init__(self):
self.errors = []
def add_error(self, error):
"Append error message to the result"
for line in error.splitlines():
self.errors.append(line)
def has_errors(self):
"Returns True if there were errors, otherwise False."
return len(self.errors) > 0
def json_diff(d1, d2):
"""
Returns a string with the difference between JSON data.
"""
json_format_opts = {
'indent': 4,
'sort_keys': True,
}
dstr1 = json.dumps(d1, **json_format_opts)
dstr2 = json.dumps(d2, **json_format_opts)
return difflines(dstr2, dstr1, title1='Expected value', title2='Current value', n=0)
def json_cmp(d1, d2):
"""
JSON compare function. Receives two parameters:
* `d1`: json value
* `d2`: json subset which we expect
Returns `None` when all keys that `d1` has matches `d2`,
otherwise a string containing what failed.
Note: key absence can be tested by adding a key with value `None`.
"""
squeue = [(d1, d2, 'json')]
result = json_cmp_result()
for s in squeue:
nd1, nd2, parent = s
s1, s2 = set(nd1), set(nd2)
# Expect all required fields to exist.
s2_req = set([key for key in nd2 if nd2[key] is not None])
diff = s2_req - s1
if diff != set({}):
result.add_error('expected key(s) {} in {} (have {}):\n{}'.format(
str(list(diff)), parent, str(list(s1)), json_diff(nd1, nd2)))
for key in s2.intersection(s1):
# Test for non existence of key in d2
if nd2[key] is None:
result.add_error('"{}" should not exist in {} (have {}):\n{}'.format(
key, parent, str(s1), json_diff(nd1[key], nd2[key])))
continue
# If nd1 key is a dict, we have to recurse in it later.
if isinstance(nd2[key], type({})):
if not isinstance(nd1[key], type({})):
result.add_error(
'{}["{}"] has different type than expected '.format(parent, key) +
'(have {}, expected {}):\n{}'.format(
type(nd1[key]), type(nd2[key]), json_diff(nd1[key], nd2[key])))
continue
nparent = '{}["{}"]'.format(parent, key)
squeue.append((nd1[key], nd2[key], nparent))
continue
# Check list items
if isinstance(nd2[key], type([])):
if not isinstance(nd1[key], type([])):
result.add_error(
'{}["{}"] has different type than expected '.format(parent, key) +
'(have {}, expected {}):\n{}'.format(
type(nd1[key]), type(nd2[key]), json_diff(nd1[key], nd2[key])))
continue
# Check list size
if len(nd2[key]) > len(nd1[key]):
result.add_error(
'{}["{}"] too few items '.format(parent, key) +
'(have {}, expected {}:\n {})'.format(
len(nd1[key]), len(nd2[key]),
json_diff(nd1[key], nd2[key])))
continue
# List all unmatched items errors
unmatched = []
for expected in nd2[key]:
matched = False
for value in nd1[key]:
if json_cmp({'json': value}, {'json': expected}) is None:
matched = True
break
if matched:
break
if not matched:
unmatched.append(expected)
# If there are unmatched items, error out.
if unmatched:
result.add_error(
'{}["{}"] value is different (\n{})'.format(
parent, key, json_diff(nd1[key], nd2[key])))
continue
# Compare JSON values
if nd1[key] != nd2[key]:
result.add_error(
'{}["{}"] value is different (\n{})'.format(
parent, key, json_diff(nd1[key], nd2[key])))
continue
if result.has_errors():
return result
return None
def run_and_expect(func, what, count=20, wait=3):
"""
Run `func` and compare the result with `what`. Do it for `count` times
waiting `wait` seconds between tries. By default it tries 20 times with
3 seconds delay between tries.
Returns (True, func-return) on success or
(False, func-return) on failure.
"""
while count > 0:
result = func()
if result != what:
time.sleep(wait)
count -= 1
continue
return (True, result)
return (False, result)
def int2dpid(dpid):
"Converting Integer to DPID"
try:
dpid = hex(dpid)[2:]
dpid = '0'*(16-len(dpid))+dpid
return dpid
except IndexError:
raise Exception('Unable to derive default datapath ID - '
'please either specify a dpid or use a '
'canonical switch name such as s23.')
def pid_exists(pid):
"Check whether pid exists in the current process table."
if pid <= 0:
return False
try:
os.kill(pid, 0)
except OSError as err:
if err.errno == errno.ESRCH:
# ESRCH == No such process
return False
elif err.errno == errno.EPERM:
# EPERM clearly means there's a process to deny access to
return True
else:
# According to "man 2 kill" possible error values are
# (EINVAL, EPERM, ESRCH)
raise
else:
return True
def get_textdiff(text1, text2, title1="", title2="", **opts):
"Returns empty string if same or formatted diff"
diff = '\n'.join(difflib.unified_diff(text1, text2,
fromfile=title1, tofile=title2, **opts))
# Clean up line endings
diff = os.linesep.join([s for s in diff.splitlines() if s])
return diff
def difflines(text1, text2, title1='', title2='', **opts):
"Wrapper for get_textdiff to avoid string transformations."
text1 = ('\n'.join(text1.rstrip().splitlines()) + '\n').splitlines(1)
text2 = ('\n'.join(text2.rstrip().splitlines()) + '\n').splitlines(1)
return get_textdiff(text1, text2, title1, title2, **opts)
def get_file(content):
"""
Generates a temporary file in '/tmp' with `content` and returns the file name.
"""
fde = tempfile.NamedTemporaryFile(mode='w', delete=False)
fname = fde.name
fde.write(content)
fde.close()
return fname
def normalize_text(text):
"""
Strips formating spaces/tabs and carriage returns.
"""
text = re.sub(r'[ \t]+', ' ', text)
text = re.sub(r'\r', '', text)
return text
def version_cmp(v1, v2):
"""
Compare two version strings and returns:
* `-1`: if `v1` is less than `v2`
* `0`: if `v1` is equal to `v2`
* `1`: if `v1` is greater than `v2`
Raises `ValueError` if versions are not well formated.
"""
vregex = r'(?P<whole>\d+(\.(\d+))*)'
v1m = re.match(vregex, v1)
v2m = re.match(vregex, v2)
if v1m is None or v2m is None:
raise ValueError("got a invalid version string")
# Split values
v1g = v1m.group('whole').split('.')
v2g = v2m.group('whole').split('.')
# Get the longest version string
vnum = len(v1g)
if len(v2g) > vnum:
vnum = len(v2g)
# Reverse list because we are going to pop the tail
v1g.reverse()
v2g.reverse()
for _ in range(vnum):
try:
v1n = int(v1g.pop())
except IndexError:
while v2g:
v2n = int(v2g.pop())
if v2n > 0:
return -1
break
try:
v2n = int(v2g.pop())
except IndexError:
if v1n > 0:
return 1
while v1g:
v1n = int(v1g.pop())
if v1n > 0:
return 1
break
if v1n > v2n:
return 1
if v1n < v2n:
return -1
return 0
def ip4_route(node):
"""
Gets a structured return of the command 'ip route'. It can be used in
conjuction with json_cmp() to provide accurate assert explanations.
Return example:
{
'10.0.1.0/24': {
'dev': 'eth0',
'via': '172.16.0.1',
'proto': '188',
},
'10.0.2.0/24': {
'dev': 'eth1',
'proto': 'kernel',
}
}
"""
output = normalize_text(node.run('ip route')).splitlines()
result = {}
for line in output:
columns = line.split(' ')
route = result[columns[0]] = {}
prev = None
for column in columns:
if prev == 'dev':
route['dev'] = column
if prev == 'via':
route['via'] = column
if prev == 'proto':
route['proto'] = column
if prev == 'metric':
route['metric'] = column
if prev == 'scope':
route['scope'] = column
prev = column
return result
def ip6_route(node):
"""
Gets a structured return of the command 'ip -6 route'. It can be used in
conjuction with json_cmp() to provide accurate assert explanations.
Return example:
{
'2001:db8:1::/64': {
'dev': 'eth0',
'proto': '188',
},
'2001:db8:2::/64': {
'dev': 'eth1',
'proto': 'kernel',
}
}
"""
output = normalize_text(node.run('ip -6 route')).splitlines()
result = {}
for line in output:
columns = line.split(' ')
route = result[columns[0]] = {}
prev = None
for column in columns:
if prev == 'dev':
route['dev'] = column
if prev == 'via':
route['via'] = column
if prev == 'proto':
route['proto'] = column
if prev == 'metric':
route['metric'] = column
if prev == 'pref':
route['pref'] = column
prev = column
return result
def sleep(amount, reason=None):
"""
Sleep wrapper that registers in the log the amount of sleep
"""
if reason is None:
logger.info('Sleeping for {} seconds'.format(amount))
else:
logger.info(reason + ' ({} seconds)'.format(amount))
time.sleep(amount)
def checkAddressSanitizerError(output, router, component):
"Checks for AddressSanitizer in output. If found, then logs it and returns true, false otherwise"
addressSantizerError = re.search('(==[0-9]+==)ERROR: AddressSanitizer: ([^\s]*) ', output)
if addressSantizerError:
sys.stderr.write("%s: %s triggered an exception by AddressSanitizer\n" % (router, component))
# Sanitizer Error found in log
pidMark = addressSantizerError.group(1)
addressSantizerLog = re.search('%s(.*)%s' % (pidMark, pidMark), output, re.DOTALL)
if addressSantizerLog:
callingTest = os.path.basename(sys._current_frames().values()[0].f_back.f_back.f_globals['__file__'])
callingProc = sys._getframe(2).f_code.co_name
with open("/tmp/AddressSanitzer.txt", "a") as addrSanFile:
sys.stderr.write('\n'.join(addressSantizerLog.group(1).splitlines()) + '\n')
addrSanFile.write("## Error: %s\n\n" % addressSantizerError.group(2))
addrSanFile.write("### AddressSanitizer error in topotest `%s`, test `%s`, router `%s`\n\n" % (callingTest, callingProc, router))
addrSanFile.write(' '+ '\n '.join(addressSantizerLog.group(1).splitlines()) + '\n')
addrSanFile.write("\n---------------\n")
return True
return False
def addRouter(topo, name):
"Adding a FRRouter (or Quagga) to Topology"
MyPrivateDirs = ['/etc/frr',
'/etc/quagga',
'/var/run/frr',
'/var/run/quagga',
'/var/log']
return topo.addNode(name, cls=Router, privateDirs=MyPrivateDirs)
def set_sysctl(node, sysctl, value):
"Set a sysctl value and return None on success or an error string"
valuestr = '{}'.format(value)
command = "sysctl {0}={1}".format(sysctl, valuestr)
cmdret = node.cmd(command)
matches = re.search(r'([^ ]+) = ([^\s]+)', cmdret)
if matches is None:
return cmdret
if matches.group(1) != sysctl:
return cmdret
if matches.group(2) != valuestr:
return cmdret
return None
def assert_sysctl(node, sysctl, value):
"Set and assert that the sysctl is set with the specified value."
assert set_sysctl(node, sysctl, value) is None
class LinuxRouter(Node):
"A Node with IPv4/IPv6 forwarding enabled."
def config(self, **params):
super(LinuxRouter, self).config(**params)
# Enable forwarding on the router
assert_sysctl(self, 'net.ipv4.ip_forward', 1)
assert_sysctl(self, 'net.ipv6.conf.all.forwarding', 1)
def terminate(self):
"""
Terminate generic LinuxRouter Mininet instance
"""
set_sysctl(self, 'net.ipv4.ip_forward', 0)
set_sysctl(self, 'net.ipv6.conf.all.forwarding', 0)
super(LinuxRouter, self).terminate()
class Router(Node):
"A Node with IPv4/IPv6 forwarding enabled and Quagga as Routing Engine"
def __init__(self, name, **params):
super(Router, self).__init__(name, **params)
self.logdir = params.get('logdir', '/tmp')
self.daemondir = None
self.hasmpls = False
self.routertype = 'frr'
self.daemons = {'zebra': 0, 'ripd': 0, 'ripngd': 0, 'ospfd': 0,
'ospf6d': 0, 'isisd': 0, 'bgpd': 0, 'pimd': 0,
'ldpd': 0, 'eigrpd': 0, 'nhrpd': 0}
self.daemons_options = {'zebra': ''}
def _config_frr(self, **params):
"Configure FRR binaries"
self.daemondir = params.get('frrdir')
if self.daemondir is None:
self.daemondir = '/usr/lib/frr'
zebra_path = os.path.join(self.daemondir, 'zebra')
if not os.path.isfile(zebra_path):
raise Exception("FRR zebra binary doesn't exist at {}".format(zebra_path))
def _config_quagga(self, **params):
"Configure Quagga binaries"
self.daemondir = params.get('quaggadir')
if self.daemondir is None:
self.daemondir = '/usr/lib/quagga'
zebra_path = os.path.join(self.daemondir, 'zebra')
if not os.path.isfile(zebra_path):
raise Exception("Quagga zebra binary doesn't exist at {}".format(zebra_path))
# pylint: disable=W0221
# Some params are only meaningful for the parent class.
def config(self, **params):
super(Router, self).config(**params)
# User did not specify the daemons directory, try to autodetect it.
self.daemondir = params.get('daemondir')
if self.daemondir is None:
self.routertype = params.get('routertype', 'frr')
if self.routertype == 'quagga':
self._config_quagga(**params)
else:
self._config_frr(**params)
else:
# Test the provided path
zpath = os.path.join(self.daemondir, 'zebra')
if not os.path.isfile(zpath):
raise Exception('No zebra binary found in {}'.format(zpath))
# Allow user to specify routertype when the path was specified.
if params.get('routertype') is not None:
self.routertype = self.params.get('routertype')
# Enable forwarding on the router
assert_sysctl(self, 'net.ipv4.ip_forward', 1)
assert_sysctl(self, 'net.ipv6.conf.all.forwarding', 1)
# Enable coredumps
assert_sysctl(self, 'kernel.core_uses_pid', 1)
assert_sysctl(self, 'fs.suid_dumpable', 2)
corefile = '{}/{}_%e_core-sig_%s-pid_%p.dmp'.format(self.logdir, self.name)
assert_sysctl(self, 'kernel.core_pattern', corefile)
self.cmd('ulimit -c unlimited')
# Set ownership of config files
self.cmd('chown {0}:{0}vty /etc/{0}'.format(self.routertype))
def terminate(self):
# Delete Running Quagga or FRR Daemons
self.stopRouter()
# rundaemons = self.cmd('ls -1 /var/run/%s/*.pid' % self.routertype)
# for d in StringIO.StringIO(rundaemons):
# self.cmd('kill -7 `cat %s`' % d.rstrip())
# self.waitOutput()
# Disable forwarding
set_sysctl(self, 'net.ipv4.ip_forward', 0)
set_sysctl(self, 'net.ipv6.conf.all.forwarding', 0)
super(Router, self).terminate()
def stopRouter(self, wait=True):
# Stop Running Quagga or FRR Daemons
rundaemons = self.cmd('ls -1 /var/run/%s/*.pid' % self.routertype)
if re.search(r"No such file or directory", rundaemons):
return
if rundaemons is not None:
numRunning = 0
for d in StringIO.StringIO(rundaemons):
daemonpid = self.cmd('cat %s' % d.rstrip()).rstrip()
if (daemonpid.isdigit() and pid_exists(int(daemonpid))):
logger.info('{}: stopping {}'.format(
self.name,
os.path.basename(d.rstrip().rsplit(".", 1)[0])
))
self.cmd('kill -TERM %s' % daemonpid)
self.waitOutput()
if pid_exists(int(daemonpid)):
numRunning += 1
if wait and numRunning > 0:
sleep(2, '{}: waiting for daemons stopping'.format(self.name))
# 2nd round of kill if daemons didn't exit
for d in StringIO.StringIO(rundaemons):
daemonpid = self.cmd('cat %s' % d.rstrip()).rstrip()
if (daemonpid.isdigit() and pid_exists(int(daemonpid))):
logger.info('{}: killing {}'.format(
self.name,
os.path.basename(d.rstrip().rsplit(".", 1)[0])
))
self.cmd('kill -7 %s' % daemonpid)
self.waitOutput()
self.cmd('rm -- {}'.format(d.rstrip()))
def removeIPs(self):
for interface in self.intfNames():
self.cmd('ip address flush', interface)
def checkCapability(self, daemon, param):
if param is not None:
daemon_path = os.path.join(self.daemondir, daemon)
daemon_search_option = param.replace('-','')
output = self.cmd('{0} -h | grep {1}'.format(
daemon_path, daemon_search_option))
if daemon_search_option not in output:
return False
return True
def loadConf(self, daemon, source=None, param=None):
# print "Daemons before:", self.daemons
if daemon in self.daemons.keys():
self.daemons[daemon] = 1
if param is not None:
self.daemons_options[daemon] = param
if source is None:
self.cmd('touch /etc/%s/%s.conf' % (self.routertype, daemon))
self.waitOutput()
else:
self.cmd('cp %s /etc/%s/%s.conf' % (source, self.routertype, daemon))
self.waitOutput()
self.cmd('chmod 640 /etc/%s/%s.conf' % (self.routertype, daemon))
self.waitOutput()
self.cmd('chown %s:%s /etc/%s/%s.conf' % (self.routertype, self.routertype, self.routertype, daemon))
self.waitOutput()
else:
logger.info('No daemon {} known'.format(daemon))
# print "Daemons after:", self.daemons
def startRouter(self, tgen=None):
# Disable integrated-vtysh-config
self.cmd('echo "no service integrated-vtysh-config" >> /etc/%s/vtysh.conf' % self.routertype)
self.cmd('chown %s:%svty /etc/%s/vtysh.conf' % (self.routertype, self.routertype, self.routertype))
# TODO remove the following lines after all tests are migrated to Topogen.
# Try to find relevant old logfiles in /tmp and delete them
map(os.remove, glob.glob("/tmp/*%s*.log" % self.name))
# Remove old core files
map(os.remove, glob.glob("/tmp/%s*.dmp" % self.name))
# Remove IP addresses from OS first - we have them in zebra.conf
self.removeIPs()
# If ldp is used, check for LDP to be compiled and Linux Kernel to be 4.5 or higher
# No error - but return message and skip all the tests
if self.daemons['ldpd'] == 1:
ldpd_path = os.path.join(self.daemondir, 'ldpd')
if not os.path.isfile(ldpd_path):
logger.info("LDP Test, but no ldpd compiled or installed")
return "LDP Test, but no ldpd compiled or installed"
if version_cmp(platform.release(), '4.5') < 0:
logger.info("LDP Test need Linux Kernel 4.5 minimum")
return "LDP Test need Linux Kernel 4.5 minimum"
# Check if have mpls
if tgen != None:
self.hasmpls = tgen.hasmpls
if self.hasmpls != True:
logger.info("LDP/MPLS Tests will be skipped, platform missing module(s)")
else:
# Test for MPLS Kernel modules available
self.hasmpls = False
if os.system('/sbin/modprobe mpls-router') != 0:
logger.info('MPLS tests will not run (missing mpls-router kernel module)')
elif os.system('/sbin/modprobe mpls-iptunnel') != 0:
logger.info('MPLS tests will not run (missing mpls-iptunnel kernel module)')
else:
self.hasmpls = True
if self.hasmpls != True:
return "LDP/MPLS Tests need mpls kernel modules"
self.cmd('echo 100000 > /proc/sys/net/mpls/platform_labels')
if self.daemons['eigrpd'] == 1:
eigrpd_path = os.path.join(self.daemondir, 'eigrpd')
if not os.path.isfile(eigrpd_path):
logger.info("EIGRP Test, but no eigrpd compiled or installed")
return "EIGRP Test, but no eigrpd compiled or installed"
self.restartRouter()
return ""
def restartRouter(self):
# Starts actuall daemons without init (ie restart)
# Start Zebra first
if self.daemons['zebra'] == 1:
zebra_path = os.path.join(self.daemondir, 'zebra')
zebra_option = self.daemons_options['zebra']
self.cmd('{0} {1} > {2}/{3}-zebra.out 2> {2}/{3}-zebra.err &'.format(
zebra_path, zebra_option, self.logdir, self.name
))
self.waitOutput()
logger.debug('{}: {} zebra started'.format(self, self.routertype))
sleep(1, '{}: waiting for zebra to start'.format(self.name))
# Fix Link-Local Addresses
# Somehow (on Mininet only), Zebra removes the IPv6 Link-Local addresses on start. Fix this
self.cmd('for i in `ls /sys/class/net/` ; do mac=`cat /sys/class/net/$i/address`; IFS=\':\'; set $mac; unset IFS; ip address add dev $i scope link fe80::$(printf %02x $((0x$1 ^ 2)))$2:${3}ff:fe$4:$5$6/64; done')
# Now start all the other daemons
for daemon in self.daemons:
# Skip disabled daemons and zebra
if self.daemons[daemon] == 0 or daemon == 'zebra':
continue
daemon_path = os.path.join(self.daemondir, daemon)
self.cmd('{0} > {1}/{2}-{3}.out 2> {1}/{2}-{3}.err &'.format(
daemon_path, self.logdir, self.name, daemon
))
self.waitOutput()
logger.debug('{}: {} {} started'.format(self, self.routertype, daemon))
def getStdErr(self, daemon):
return self.getLog('err', daemon)
def getStdOut(self, daemon):
return self.getLog('out', daemon)
def getLog(self, log, daemon):
return self.cmd('cat {}/{}-{}.{}'.format(self.logdir, self.name, daemon, log))
def checkRouterRunning(self):
"Check if router daemons are running and collect crashinfo they don't run"
global fatal_error
daemonsRunning = self.cmd('vtysh -c "show log" | grep "Logging configuration for"')
# Look for AddressSanitizer Errors in vtysh output and append to /tmp/AddressSanitzer.txt if found
if checkAddressSanitizerError(daemonsRunning, self.name, "vtysh"):
return "%s: vtysh killed by AddressSanitizer" % (self.name)
for daemon in self.daemons:
if (self.daemons[daemon] == 1) and not (daemon in daemonsRunning):
sys.stderr.write("%s: Daemon %s not running\n" % (self.name, daemon))
# Look for core file
corefiles = glob.glob('{}/{}_{}_core*.dmp'.format(
self.logdir, self.name, daemon))
if (len(corefiles) > 0):
daemon_path = os.path.join(self.daemondir, daemon)
backtrace = subprocess.check_output([
"gdb {} {} --batch -ex bt 2> /dev/null".format(daemon_path, corefiles[0])
], shell=True)
sys.stderr.write("\n%s: %s crashed. Core file found - Backtrace follows:\n" % (self.name, daemon))
sys.stderr.write("%s\n" % backtrace)
else:
# No core found - If we find matching logfile in /tmp, then print last 20 lines from it.
if os.path.isfile('{}/{}-{}.log'.format(self.logdir, self.name, daemon)):
log_tail = subprocess.check_output([
"tail -n20 {}/{}-{}.log 2> /dev/null".format(
self.logdir, self.name, daemon)
], shell=True)
sys.stderr.write("\nFrom %s %s %s log file:\n" % (self.routertype, self.name, daemon))
sys.stderr.write("%s\n" % log_tail)
# Look for AddressSanitizer Errors and append to /tmp/AddressSanitzer.txt if found
if checkAddressSanitizerError(self.getStdErr(daemon), self.name, daemon):
return "%s: Daemon %s not running - killed by AddressSanitizer" % (self.name, daemon)
return "%s: Daemon %s not running" % (self.name, daemon)
return ""
def get_ipv6_linklocal(self):
"Get LinkLocal Addresses from interfaces"
linklocal = []
ifaces = self.cmd('ip -6 address')
# Fix newlines (make them all the same)
ifaces = ('\n'.join(ifaces.splitlines()) + '\n').splitlines()
interface=""
ll_per_if_count=0
for line in ifaces:
m = re.search('[0-9]+: ([^:@]+)[@if0-9:]+ <', line)
if m:
interface = m.group(1)
ll_per_if_count = 0
m = re.search('inet6 (fe80::[0-9a-f]+:[0-9a-f]+:[0-9a-f]+:[0-9a-f]+)[/0-9]* scope link', line)
if m:
local = m.group(1)
ll_per_if_count += 1
if (ll_per_if_count > 1):
linklocal += [["%s-%s" % (interface, ll_per_if_count), local]]
else:
linklocal += [[interface, local]]
return linklocal
def daemon_available(self, daemon):
"Check if specified daemon is installed (and for ldp if kernel supports MPLS)"
daemon_path = os.path.join(self.daemondir, daemon)
if not os.path.isfile(daemon_path):
return False
if (daemon == 'ldpd'):
if version_cmp(platform.release(), '4.5') < 0:
return False
if self.cmd('/sbin/modprobe -n mpls-router' ) != "":
return False
if self.cmd('/sbin/modprobe -n mpls-iptunnel') != "":
return False
return True
def get_routertype(self):
"Return the type of Router (frr or quagga)"
return self.routertype
def report_memory_leaks(self, filename_prefix, testscript):
"Report Memory Leaks to file prefixed with given string"
leakfound = False
filename = filename_prefix + re.sub(r"\.py", "", testscript) + ".txt"
for daemon in self.daemons:
if (self.daemons[daemon] == 1):
log = self.getStdErr(daemon)
if "memstats" in log:
# Found memory leak
logger.info('\nRouter {} {} StdErr Log:\n{}'.format(
self.name, daemon, log))
if not leakfound:
leakfound = True
# Check if file already exists
fileexists = os.path.isfile(filename)
leakfile = open(filename, "a")
if not fileexists:
# New file - add header
leakfile.write("# Memory Leak Detection for topotest %s\n\n" % testscript)
leakfile.write("## Router %s\n" % self.name)
leakfile.write("### Process %s\n" % daemon)
log = re.sub("core_handler: ", "", log)
log = re.sub(r"(showing active allocations in memory group [a-zA-Z0-9]+)", r"\n#### \1\n", log)
log = re.sub("memstats: ", " ", log)
leakfile.write(log)
leakfile.write("\n")
if leakfound:
leakfile.close()
class LegacySwitch(OVSSwitch):
"A Legacy Switch without OpenFlow"
def __init__(self, name, **params):
OVSSwitch.__init__(self, name, failMode='standalone', **params)
self.switchIP = None