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
|
import socket
import scapy.compat
from scapy.layers.inet import IP, UDP
from scapy.layers.inet6 import IPv6
from scapy.layers.l2 import Ether, GRE
from scapy.packet import Raw
from scapy.data import IP_PROTOS
from framework import VppTestCase
from util import ppp
from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_ip import INVALID_INDEX
""" TestLB is a subclass of VPPTestCase classes.
TestLB class defines Load Balancer test cases for:
- IP4 to GRE4 encap on per-port vip case
- IP4 to GRE6 encap on per-port vip case
- IP6 to GRE4 encap on per-port vip case
- IP6 to GRE6 encap on per-port vip case
- IP4 to L3DSR encap on vip case
- IP4 to L3DSR encap on per-port vip case
- IP4 to NAT4 encap on per-port vip case
- IP6 to NAT6 encap on per-port vip case
As stated in comments below, GRE has issues with IPv6.
All test cases involving IPv6 are executed, but
received packets are not parsed and checked.
"""
class TestLB(VppTestCase):
""" Load Balancer Test Case """
@classmethod
def setUpClass(cls):
super(TestLB, cls).setUpClass()
cls.ass = range(5)
cls.packets = range(1)
try:
cls.create_pg_interfaces(range(2))
cls.interfaces = list(cls.pg_interfaces)
for i in cls.interfaces:
i.admin_up()
i.config_ip4()
i.config_ip6()
i.disable_ipv6_ra()
i.resolve_arp()
i.resolve_ndp()
dst4 = VppIpRoute(cls, "10.0.0.0", 24,
[VppRoutePath(cls.pg1.remote_ip4,
INVALID_INDEX)],
register=False)
dst4.add_vpp_config()
dst6 = VppIpRoute(cls, "2002::", 16,
[VppRoutePath(cls.pg1.remote_ip6,
INVALID_INDEX)],
register=False)
dst6.add_vpp_config()
cls.vapi.lb_conf(ip4_src_address="39.40.41.42",
ip6_src_address="2004::1")
except Exception:
super(TestLB, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestLB, cls).tearDownClass()
def tearDown(self):
super(TestLB, self).tearDown()
def show_commands_at_teardown(self):
self.logger.info(self.vapi.cli("show lb vip verbose"))
def getIPv4Flow(self, id):
return (IP(dst="90.0.%u.%u" % (id / 255, id % 255),
src="40.0.%u.%u" % (id / 255, id % 255)) /
UDP(sport=10000 + id, dport=20000))
def getIPv6Flow(self, id):
return (IPv6(dst="2001::%u" % (id), src="fd00:f00d:ffff::%u" % (id)) /
UDP(sport=10000 + id, dport=20000))
def generatePackets(self, src_if, isv4):
self.reset_packet_infos()
pkts = []
for pktid in self.packets:
info = self.create_packet_info(src_if, self.pg1)
payload = self.info_to_payload(info)
ip = self.getIPv4Flow(pktid) if isv4 else self.getIPv6Flow(pktid)
packet = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
ip /
Raw(payload))
self.extend_packet(packet, 128)
info.data = packet.copy()
pkts.append(packet)
return pkts
def checkInner(self, gre, isv4):
IPver = IP if isv4 else IPv6
self.assertEqual(gre.proto, 0x0800 if isv4 else 0x86DD)
self.assertEqual(gre.flags, 0)
self.assertEqual(gre.version, 0)
inner = IPver(scapy.compat.raw(gre.payload))
payload_info = self.payload_to_info(inner[Raw])
self.info = self.packet_infos[payload_info.index]
self.assertEqual(payload_info.src, self.pg0.sw_if_index)
self.assertEqual(scapy.compat.raw(inner),
scapy.compat.raw(self.info.data[IPver]))
def checkCapture(self, encap, isv4):
self.pg0.assert_nothing_captured()
out = self.pg1.get_capture(len(self.packets))
load = [0] * len(self.ass)
self.info = None
for p in out:
try:
asid = 0
gre = None
if (encap == 'gre4'):
ip = p[IP]
asid = int(ip.dst.split(".")[3])
self.assertEqual(ip.version, 4)
self.assertEqual(ip.flags, 0)
self.assertEqual(ip.src, "39.40.41.42")
self.assertEqual(ip.dst, "10.0.0.%u" % asid)
self.assertEqual(ip.proto, 47)
self.assertEqual(len(ip.options), 0)
gre = p[GRE]
self.checkInner(gre, isv4)
elif (encap == 'gre6'):
ip = p[IPv6]
asid = ip.dst.split(":")
asid = asid[len(asid) - 1]
asid = 0 if asid == "" else int(asid)
self.assertEqual(ip.version, 6)
self.assertEqual(ip.tc, 0)
self.assertEqual(ip.fl, 0)
self.assertEqual(ip.src, "2004::1")
self.assertEqual(
socket.inet_pton(socket.AF_INET6, ip.dst),
socket.inet_pton(socket.AF_INET6, "2002::%u" % asid)
)
self.assertEqual(ip.nh, 47)
# self.assertEqual(len(ip.options), 0)
gre = GRE(scapy.compat.raw(p[IPv6].payload))
self.checkInner(gre, isv4)
elif (encap == 'l3dsr'):
ip = p[IP]
asid = int(ip.dst.split(".")[3])
self.assertEqual(ip.version, 4)
self.assertEqual(ip.flags, 0)
self.assertEqual(ip.dst, "10.0.0.%u" % asid)
self.assertEqual(ip.tos, 0x1c)
self.assertEqual(len(ip.options), 0)
self.assert_ip_checksum_valid(p)
if ip.proto == IP_PROTOS.tcp:
self.assert_tcp_checksum_valid(p)
elif ip.proto == IP_PROTOS.udp:
self.assert_udp_checksum_valid(p)
elif (encap == 'nat4'):
ip = p[IP]
asid = int(ip.dst.split(".")[3])
self.assertEqual(ip.version, 4)
self.assertEqual(ip.flags, 0)
self.assertEqual(ip.dst, "10.0.0.%u" % asid)
self.assertEqual(ip.proto, 17)
self.assertEqual(len(ip.options), 0)
udp = p[UDP]
self.assertEqual(udp.dport, 3307)
elif (encap == 'nat6'):
ip = p[IPv6]
asid = ip.dst.split(":")
asid = asid[len(asid) - 1]
asid = 0 if asid == "" else int(asid)
self.assertEqual(ip.version, 6)
self.assertEqual(ip.tc, 0)
self.assertEqual(ip.fl, 0)
self.assertEqual(
socket.inet_pton(socket.AF_INET6, ip.dst),
socket.inet_pton(socket.AF_INET6, "2002::%u" % asid)
)
self.assertEqual(ip.nh, 17)
self.assertGreaterEqual(ip.hlim, 63)
udp = UDP(scapy.compat.raw(p[IPv6].payload))
self.assertEqual(udp.dport, 3307)
load[asid] += 1
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
# This is just to roughly check that the balancing algorithm
# is not completely biased.
for asid in self.ass:
if load[asid] < int(len(self.packets) / (len(self.ass) * 2)):
self.logger.error(
"ASS is not balanced: load[%d] = %d" % (asid, load[asid]))
raise Exception("Load Balancer algorithm is biased")
def test_lb_ip4_gre4(self):
""" Load Balancer IP4 GRE4 on vip case """
try:
self.vapi.cli(
"lb vip 90.0.0.0/8 encap gre4")
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 10.0.0.%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='gre4', isv4=True)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 10.0.0.%u del"
% (asid))
self.vapi.cli(
"lb vip 90.0.0.0/8 encap gre4 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip6_gre4(self):
""" Load Balancer IP6 GRE4 on vip case """
try:
self.vapi.cli(
"lb vip 2001::/16 encap gre4")
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 10.0.0.%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='gre4', isv4=False)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 10.0.0.%u del"
% (asid))
self.vapi.cli(
"lb vip 2001::/16 encap gre4 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip4_gre6(self):
""" Load Balancer IP4 GRE6 on vip case """
try:
self.vapi.cli(
"lb vip 90.0.0.0/8 encap gre6")
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 2002::%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='gre6', isv4=True)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 2002::%u del"
% (asid))
self.vapi.cli(
"lb vip 90.0.0.0/8 encap gre6 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip6_gre6(self):
""" Load Balancer IP6 GRE6 on vip case """
try:
self.vapi.cli(
"lb vip 2001::/16 encap gre6")
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 2002::%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='gre6', isv4=False)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 2002::%u del"
% (asid))
self.vapi.cli(
"lb vip 2001::/16 encap gre6 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip4_gre4_port(self):
""" Load Balancer IP4 GRE4 on per-port-vip case """
try:
self.vapi.cli(
"lb vip 90.0.0.0/8 protocol udp port 20000 encap gre4")
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='gre4', isv4=True)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u del"
% (asid))
self.vapi.cli(
"lb vip 90.0.0.0/8 protocol udp port 20000 encap gre4 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip6_gre4_port(self):
""" Load Balancer IP6 GRE4 on per-port-vip case """
try:
self.vapi.cli(
"lb vip 2001::/16 protocol udp port 20000 encap gre4")
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 protocol udp port 20000 10.0.0.%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='gre4', isv4=False)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 protocol udp port 20000 10.0.0.%u del"
% (asid))
self.vapi.cli(
"lb vip 2001::/16 protocol udp port 20000 encap gre4 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip4_gre6_port(self):
""" Load Balancer IP4 GRE6 on per-port-vip case """
try:
self.vapi.cli(
"lb vip 90.0.0.0/8 protocol udp port 20000 encap gre6")
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 protocol udp port 20000 2002::%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='gre6', isv4=True)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 protocol udp port 20000 2002::%u del"
% (asid))
self.vapi.cli(
"lb vip 90.0.0.0/8 protocol udp port 20000 encap gre6 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip6_gre6_port(self):
""" Load Balancer IP6 GRE6 on per-port-vip case """
try:
self.vapi.cli(
"lb vip 2001::/16 protocol udp port 20000 encap gre6")
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 protocol udp port 20000 2002::%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='gre6', isv4=False)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 protocol udp port 20000 2002::%u del"
% (asid))
self.vapi.cli(
"lb vip 2001::/16 protocol udp port 20000 encap gre6 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip4_l3dsr(self):
""" Load Balancer IP4 L3DSR on vip case """
try:
self.vapi.cli(
"lb vip 90.0.0.0/8 encap l3dsr dscp 7")
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 10.0.0.%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='l3dsr', isv4=True)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 10.0.0.%u del"
% (asid))
self.vapi.cli(
"lb vip 90.0.0.0/8 encap l3dsr"
" dscp 7 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip4_l3dsr_port(self):
""" Load Balancer IP4 L3DSR on per-port-vip case """
try:
self.vapi.cli(
"lb vip 90.0.0.0/8 protocol udp port 20000 encap l3dsr dscp 7")
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='l3dsr', isv4=True)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u del"
% (asid))
self.vapi.cli(
"lb vip 90.0.0.0/8 protocol udp port 20000 encap l3dsr"
" dscp 7 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip4_nat4_port(self):
""" Load Balancer IP4 NAT4 on per-port-vip case """
try:
self.vapi.cli(
"lb vip 90.0.0.0/8 protocol udp port 20000 encap nat4"
" type clusterip target_port 3307")
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='nat4', isv4=True)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 90.0.0.0/8 protocol udp port 20000 10.0.0.%u del"
% (asid))
self.vapi.cli(
"lb vip 90.0.0.0/8 protocol udp port 20000 encap nat4"
" type clusterip target_port 3307 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip6_nat6_port(self):
""" Load Balancer IP6 NAT6 on per-port-vip case """
try:
self.vapi.cli(
"lb vip 2001::/16 protocol udp port 20000 encap nat6"
" type clusterip target_port 3307")
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 protocol udp port 20000 2002::%u"
% (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='nat6', isv4=False)
finally:
for asid in self.ass:
self.vapi.cli(
"lb as 2001::/16 protocol udp port 20000 2002::%u del"
% (asid))
self.vapi.cli(
"lb vip 2001::/16 protocol udp port 20000 encap nat6"
" type clusterip target_port 3307 del")
self.vapi.cli("test lb flowtable flush")
|
