5 from socket import AF_INET6
7 from framework import VppTestCase, VppTestRunner
8 from vpp_ip import DpoProto
9 from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable
10 from vpp_srv6 import SRv6LocalSIDBehaviors, VppSRv6LocalSID, VppSRv6Policy, \
11 SRv6PolicyType, VppSRv6Steering, SRv6PolicySteeringTypes
14 from scapy.packet import Raw
15 from scapy.layers.l2 import Ether, Dot1Q
16 from scapy.layers.inet6 import IPv6, UDP, IPv6ExtHdrSegmentRouting
17 from scapy.layers.inet import IP, UDP
19 from scapy.utils import inet_pton, inet_ntop
24 class TestSRv6(VppTestCase):
25 """ SRv6 Dynamic Proxy plugin Test Case """
29 super(TestSRv6, self).setUpClass()
32 def tearDownClass(cls):
33 super(TestSRv6, cls).tearDownClass()
36 """ Perform test setup before each test case.
38 super(TestSRv6, self).setUp()
40 # packet sizes, inclusive L2 overhead
41 self.pg_packet_sizes = [64, 512, 1518, 9018]
44 self.reset_packet_infos()
47 """ Clean up test setup after each test case.
49 self.teardown_interfaces()
51 super(TestSRv6, self).tearDown()
53 def configure_interface(self,
55 ipv6=False, ipv4=False,
56 ipv6_table_id=0, ipv4_table_id=0):
57 """ Configure interface.
58 :param ipv6: configure IPv6 on interface
59 :param ipv4: configure IPv4 on interface
60 :param ipv6_table_id: FIB table_id for IPv6
61 :param ipv4_table_id: FIB table_id for IPv4
63 self.logger.debug("Configuring interface %s" % (interface.name))
65 self.logger.debug("Configuring IPv6")
66 interface.set_table_ip6(ipv6_table_id)
67 interface.config_ip6()
68 interface.resolve_ndp(timeout=5)
70 self.logger.debug("Configuring IPv4")
71 interface.set_table_ip4(ipv4_table_id)
72 interface.config_ip4()
73 interface.resolve_arp()
76 def setup_interfaces(self, ipv6=[], ipv4=[],
77 ipv6_table_id=[], ipv4_table_id=[]):
78 """ Create and configure interfaces.
80 :param ipv6: list of interface IPv6 capabilities
81 :param ipv4: list of interface IPv4 capabilities
82 :param ipv6_table_id: list of intf IPv6 FIB table_ids
83 :param ipv4_table_id: list of intf IPv4 FIB table_ids
84 :returns: List of created interfaces.
86 # how many interfaces?
91 self.logger.debug("Creating and configuring %d interfaces" % (count))
93 # fill up ipv6 and ipv4 lists if needed
94 # not enabled (False) is the default
96 ipv6 += (count - len(ipv6)) * [False]
98 ipv4 += (count - len(ipv4)) * [False]
100 # fill up table_id lists if needed
101 # table_id 0 (global) is the default
102 if len(ipv6_table_id) < count:
103 ipv6_table_id += (count - len(ipv6_table_id)) * [0]
104 if len(ipv4_table_id) < count:
105 ipv4_table_id += (count - len(ipv4_table_id)) * [0]
107 # create 'count' pg interfaces
108 self.create_pg_interfaces(range(count))
110 # setup all interfaces
111 for i in range(count):
112 intf = self.pg_interfaces[i]
113 self.configure_interface(intf,
115 ipv6_table_id[i], ipv4_table_id[i])
118 self.logger.debug(self.vapi.cli("show ip6 neighbors"))
120 self.logger.debug(self.vapi.cli("show ip arp"))
121 self.logger.debug(self.vapi.cli("show interface"))
122 self.logger.debug(self.vapi.cli("show hardware"))
124 return self.pg_interfaces
126 def teardown_interfaces(self):
127 """ Unconfigure and bring down interface.
129 self.logger.debug("Tearing down interfaces")
130 # tear down all interfaces
131 # AFAIK they cannot be deleted
132 for i in self.pg_interfaces:
133 self.logger.debug("Tear down interface %s" % (i.name))
139 def test_SRv6_End_AD_IPv6(self):
140 """ Test SRv6 End.AD behavior with IPv6 traffic.
142 self.src_addr = 'a0::'
143 self.sid_list = ['a1::', 'a2::a6', 'a3::']
144 self.test_sid_index = 1
146 # send traffic to one destination interface
147 # source and destination interfaces are IPv6 only
148 self.setup_interfaces(ipv6=[True, True])
150 # configure route to next segment
151 route = VppIpRoute(self, self.sid_list[self.test_sid_index + 1], 128,
152 [VppRoutePath(self.pg0.remote_ip6,
153 self.pg0.sw_if_index,
154 proto=DpoProto.DPO_PROTO_IP6)])
155 route.add_vpp_config()
157 # configure SRv6 localSID behavior
158 cli_str = "sr localsid address " + \
159 self.sid_list[self.test_sid_index] + \
160 " behavior end.ad" + \
161 " nh " + self.pg1.remote_ip6 + \
162 " oif " + self.pg1.name + \
163 " iif " + self.pg1.name
164 self.vapi.cli(cli_str)
167 self.logger.debug(self.vapi.cli("show sr localsid"))
169 # send one packet per packet size
170 count = len(self.pg_packet_sizes)
172 # prepare IPv6 in SRv6 headers
173 packet_header1 = self.create_packet_header_IPv6_SRH_IPv6(
174 srcaddr=self.src_addr,
175 sidlist=self.sid_list[::-1],
176 segleft=len(self.sid_list) - self.test_sid_index - 1)
178 # generate packets (pg0->pg1)
179 pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
180 self.pg_packet_sizes, count)
182 # send packets and verify received packets
183 self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
184 self.compare_rx_tx_packet_End_AD_IPv6_out)
186 # log the localsid counters
187 self.logger.info(self.vapi.cli("show sr localsid"))
189 # prepare IPv6 header for returning packets
190 packet_header2 = self.create_packet_header_IPv6()
192 # generate returning packets (pg1->pg0)
193 pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
194 self.pg_packet_sizes, count)
196 # send packets and verify received packets
197 self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
198 self.compare_rx_tx_packet_End_AD_IPv6_in)
200 # log the localsid counters
201 self.logger.info(self.vapi.cli("show sr localsid"))
203 # remove SRv6 localSIDs
204 cli_str = "sr localsid del address " + \
205 self.sid_list[self.test_sid_index]
206 self.vapi.cli(cli_str)
209 self.teardown_interfaces()
211 def compare_rx_tx_packet_End_AD_IPv6_out(self, tx_pkt, rx_pkt):
212 """ Compare input and output packet after passing End.AD with IPv6
214 :param tx_pkt: transmitted packet
215 :param rx_pkt: received packet
218 # get first (outer) IPv6 header of rx'ed packet
219 rx_ip = rx_pkt.getlayer(IPv6)
221 tx_ip = tx_pkt.getlayer(IPv6)
222 tx_ip2 = tx_pkt.getlayer(IPv6, 2)
224 # verify if rx'ed packet has no SRH
225 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
227 # the whole rx_ip pkt should be equal to tx_ip2
228 # except for the hlim field
229 # -> adjust tx'ed hlim to expected hlim
230 tx_ip2.hlim = tx_ip2.hlim - 1
232 self.assertEqual(rx_ip, tx_ip2)
234 self.logger.debug("packet verification: SUCCESS")
236 def compare_rx_tx_packet_End_AD_IPv6_in(self, tx_pkt, rx_pkt):
237 """ Compare input and output packet after passing End.AD
239 :param tx_pkt: transmitted packet
240 :param rx_pkt: received packet
243 # get first (outer) IPv6 header of rx'ed packet
244 rx_ip = rx_pkt.getlayer(IPv6)
245 # received ip.src should be equal to SR Policy source
246 self.assertEqual(rx_ip.src, self.src_addr)
247 # received ip.dst should be equal to expected sidlist next segment
248 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
250 # rx'ed packet should have SRH
251 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
254 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
255 # rx'ed seglist should be equal to SID-list in reversed order
256 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
257 # segleft should be equal to previous segleft value minus 1
258 self.assertEqual(rx_srh.segleft,
259 len(self.sid_list) - self.test_sid_index - 2)
260 # lastentry should be equal to the SID-list length minus 1
261 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
263 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
264 # except for the hop-limit field
265 tx_ip = tx_pkt.getlayer(IPv6)
266 # -> update tx'ed hlim to the expected hlim
269 self.assertEqual(rx_srh.payload, tx_ip)
271 self.logger.debug("packet verification: SUCCESS")
273 def test_SRv6_End_AD_IPv4(self):
274 """ Test SRv6 End.AD behavior with IPv4 traffic.
276 self.src_addr = 'a0::'
277 self.sid_list = ['a1::', 'a2::a4', 'a3::']
278 self.test_sid_index = 1
280 # send traffic to one destination interface
281 # source and destination interfaces are IPv6 only
282 self.setup_interfaces(ipv6=[True, False], ipv4=[False, True])
284 # configure route to next segment
285 route = VppIpRoute(self, self.sid_list[self.test_sid_index + 1], 128,
286 [VppRoutePath(self.pg0.remote_ip6,
287 self.pg0.sw_if_index,
288 proto=DpoProto.DPO_PROTO_IP6)])
289 route.add_vpp_config()
291 # configure SRv6 localSID behavior
292 cli_str = "sr localsid address " + \
293 self.sid_list[self.test_sid_index] + \
294 " behavior end.ad" + \
295 " nh " + self.pg1.remote_ip4 + \
296 " oif " + self.pg1.name + \
297 " iif " + self.pg1.name
298 self.vapi.cli(cli_str)
301 self.logger.debug(self.vapi.cli("show sr localsid"))
303 # send one packet per packet size
304 count = len(self.pg_packet_sizes)
306 # prepare IPv4 in SRv6 headers
307 packet_header1 = self.create_packet_header_IPv6_SRH_IPv4(
308 srcaddr=self.src_addr,
309 sidlist=self.sid_list[::-1],
310 segleft=len(self.sid_list) - self.test_sid_index - 1)
312 # generate packets (pg0->pg1)
313 pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
314 self.pg_packet_sizes, count)
316 # send packets and verify received packets
317 self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
318 self.compare_rx_tx_packet_End_AD_IPv4_out)
320 # log the localsid counters
321 self.logger.info(self.vapi.cli("show sr localsid"))
323 # prepare IPv6 header for returning packets
324 packet_header2 = self.create_packet_header_IPv4()
326 # generate returning packets (pg1->pg0)
327 pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
328 self.pg_packet_sizes, count)
330 # send packets and verify received packets
331 self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
332 self.compare_rx_tx_packet_End_AD_IPv4_in)
334 # log the localsid counters
335 self.logger.info(self.vapi.cli("show sr localsid"))
337 # remove SRv6 localSIDs
338 cli_str = "sr localsid del address " + \
339 self.sid_list[self.test_sid_index]
340 self.vapi.cli(cli_str)
343 self.teardown_interfaces()
345 def compare_rx_tx_packet_End_AD_IPv4_out(self, tx_pkt, rx_pkt):
346 """ Compare input and output packet after passing End.AD with IPv4
348 :param tx_pkt: transmitted packet
349 :param rx_pkt: received packet
352 # get IPv4 header of rx'ed packet
353 rx_ip = rx_pkt.getlayer(IP)
355 tx_ip = tx_pkt.getlayer(IPv6)
356 tx_ip2 = tx_pkt.getlayer(IP)
358 # verify if rx'ed packet has no SRH
359 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
361 # the whole rx_ip pkt should be equal to tx_ip2
362 # except for the ttl field and ip checksum
363 # -> adjust tx'ed ttl to expected ttl
364 tx_ip2.ttl = tx_ip2.ttl - 1
365 # -> set tx'ed ip checksum to None and let scapy recompute
367 # read back the pkt (with str()) to force computing these fields
368 # probably other ways to accomplish this are possible
369 tx_ip2 = IP(scapy.compat.raw(tx_ip2))
371 self.assertEqual(rx_ip, tx_ip2)
373 self.logger.debug("packet verification: SUCCESS")
375 def compare_rx_tx_packet_End_AD_IPv4_in(self, tx_pkt, rx_pkt):
376 """ Compare input and output packet after passing End.AD
378 :param tx_pkt: transmitted packet
379 :param rx_pkt: received packet
382 # get first (outer) IPv6 header of rx'ed packet
383 rx_ip = rx_pkt.getlayer(IPv6)
384 # received ip.src should be equal to SR Policy source
385 self.assertEqual(rx_ip.src, self.src_addr)
386 # received ip.dst should be equal to expected sidlist next segment
387 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
389 # rx'ed packet should have SRH
390 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
393 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
394 # rx'ed seglist should be equal to SID-list in reversed order
395 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
396 # segleft should be equal to previous segleft value minus 1
397 self.assertEqual(rx_srh.segleft,
398 len(self.sid_list) - self.test_sid_index - 2)
399 # lastentry should be equal to the SID-list length minus 1
400 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
402 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
403 # except for the ttl field and ip checksum
404 tx_ip = tx_pkt.getlayer(IP)
405 # -> adjust tx'ed ttl to expected ttl
406 tx_ip.ttl = tx_ip.ttl - 1
407 # -> set tx'ed ip checksum to None and let scapy recompute
409 # -> read back the pkt (with str()) to force computing these fields
410 # probably other ways to accomplish this are possible
411 self.assertEqual(rx_srh.payload, IP(scapy.compat.raw(tx_ip)))
413 self.logger.debug("packet verification: SUCCESS")
415 def test_SRv6_End_AD_L2(self):
416 """ Test SRv6 End.AD behavior with L2 traffic.
418 self.src_addr = 'a0::'
419 self.sid_list = ['a1::', 'a2::a4', 'a3::']
420 self.test_sid_index = 1
422 # send traffic to one destination interface
423 # source and destination interfaces are IPv6 only
424 self.setup_interfaces(ipv6=[True, False])
426 # configure route to next segment
427 route = VppIpRoute(self, self.sid_list[self.test_sid_index + 1], 128,
428 [VppRoutePath(self.pg0.remote_ip6,
429 self.pg0.sw_if_index,
430 proto=DpoProto.DPO_PROTO_IP6)])
431 route.add_vpp_config()
433 # configure SRv6 localSID behavior
434 cli_str = "sr localsid address " + \
435 self.sid_list[self.test_sid_index] + \
436 " behavior end.ad" + \
437 " oif " + self.pg1.name + \
438 " iif " + self.pg1.name
439 self.vapi.cli(cli_str)
442 self.logger.debug(self.vapi.cli("show sr localsid"))
444 # send one packet per packet size
445 count = len(self.pg_packet_sizes)
447 # prepare L2 in SRv6 headers
448 packet_header1 = self.create_packet_header_IPv6_SRH_L2(
449 srcaddr=self.src_addr,
450 sidlist=self.sid_list[::-1],
451 segleft=len(self.sid_list) - self.test_sid_index - 1,
454 # generate packets (pg0->pg1)
455 pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
456 self.pg_packet_sizes, count)
458 # send packets and verify received packets
459 self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
460 self.compare_rx_tx_packet_End_AD_L2_out)
462 # log the localsid counters
463 self.logger.info(self.vapi.cli("show sr localsid"))
465 # prepare L2 header for returning packets
466 packet_header2 = self.create_packet_header_L2()
468 # generate returning packets (pg1->pg0)
469 pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
470 self.pg_packet_sizes, count)
472 # send packets and verify received packets
473 self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
474 self.compare_rx_tx_packet_End_AD_L2_in)
476 # log the localsid counters
477 self.logger.info(self.vapi.cli("show sr localsid"))
479 # remove SRv6 localSIDs
480 cli_str = "sr localsid del address " + \
481 self.sid_list[self.test_sid_index]
482 self.vapi.cli(cli_str)
485 self.teardown_interfaces()
487 def compare_rx_tx_packet_End_AD_L2_out(self, tx_pkt, rx_pkt):
488 """ Compare input and output packet after passing End.AD with L2
490 :param tx_pkt: transmitted packet
491 :param rx_pkt: received packet
494 # get IPv4 header of rx'ed packet
495 rx_eth = rx_pkt.getlayer(Ether)
497 tx_ip = tx_pkt.getlayer(IPv6)
498 # we can't just get the 2nd Ether layer
499 # get the Raw content and dissect it as Ether
500 tx_eth1 = Ether(scapy.compat.raw(tx_pkt[Raw]))
502 # verify if rx'ed packet has no SRH
503 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
505 # the whole rx_eth pkt should be equal to tx_eth1
506 self.assertEqual(rx_eth, tx_eth1)
508 self.logger.debug("packet verification: SUCCESS")
510 def compare_rx_tx_packet_End_AD_L2_in(self, tx_pkt, rx_pkt):
511 """ Compare input and output packet after passing End.AD
513 :param tx_pkt: transmitted packet
514 :param rx_pkt: received packet
518 # get first (outer) IPv6 header of rx'ed packet
519 rx_ip = rx_pkt.getlayer(IPv6)
520 # received ip.src should be equal to SR Policy source
521 self.assertEqual(rx_ip.src, self.src_addr)
522 # received ip.dst should be equal to expected sidlist next segment
523 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
525 # rx'ed packet should have SRH
526 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
529 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
530 # rx'ed seglist should be equal to SID-list in reversed order
531 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
532 # segleft should be equal to previous segleft value minus 1
533 self.assertEqual(rx_srh.segleft,
534 len(self.sid_list) - self.test_sid_index - 2)
535 # lastentry should be equal to the SID-list length minus 1
536 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
538 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
539 tx_ether = tx_pkt.getlayer(Ether)
540 self.assertEqual(Ether(scapy.compat.raw(rx_srh.payload)), tx_ether)
542 self.logger.debug("packet verification: SUCCESS")
544 def create_stream(self, src_if, dst_if, packet_header, packet_sizes,
546 """Create SRv6 input packet stream for defined interface.
548 :param VppInterface src_if: Interface to create packet stream for
549 :param VppInterface dst_if: destination interface of packet stream
550 :param packet_header: Layer3 scapy packet headers,
551 L2 is added when not provided,
552 Raw(payload) with packet_info is added
553 :param list packet_sizes: packet stream pckt sizes,sequentially applied
554 to packets in stream have
555 :param int count: number of packets in packet stream
556 :return: list of packets
558 self.logger.info("Creating packets")
560 for i in range(0, count - 1):
561 payload_info = self.create_packet_info(src_if, dst_if)
563 "Creating packet with index %d" % (payload_info.index))
564 payload = self.info_to_payload(payload_info)
565 # add L2 header if not yet provided in packet_header
566 if packet_header.getlayer(0).name == 'Ethernet':
567 p = packet_header / Raw(payload)
569 p = Ether(dst=src_if.local_mac, src=src_if.remote_mac) / \
570 packet_header / Raw(payload)
571 size = packet_sizes[i % len(packet_sizes)]
572 self.logger.debug("Packet size %d" % (size))
573 self.extend_packet(p, size)
574 # we need to store the packet with the automatic fields computed
575 # read back the dumped packet (with str())
576 # to force computing these fields
577 # probably other ways are possible
578 p = Ether(scapy.compat.raw(p))
579 payload_info.data = p.copy()
580 self.logger.debug(ppp("Created packet:", p))
582 self.logger.info("Done creating packets")
585 def send_and_verify_pkts(self, input, pkts, output, compare_func):
586 """Send packets and verify received packets using compare_func
588 :param input: ingress interface of DUT
589 :param pkts: list of packets to transmit
590 :param output: egress interface of DUT
591 :param compare_func: function to compare in and out packets
593 # add traffic stream to input interface
594 input.add_stream(pkts)
596 # enable capture on all interfaces
597 self.pg_enable_capture(self.pg_interfaces)
600 self.logger.info("Starting traffic")
604 self.logger.info("Getting packet capture")
605 capture = output.get_capture()
607 # assert nothing was captured on input interface
608 # input.assert_nothing_captured()
610 # verify captured packets
611 self.verify_captured_pkts(output, capture, compare_func)
613 def create_packet_header_IPv6(self):
614 """Create packet header: IPv6 header, UDP header
616 :param dst: IPv6 destination address
618 IPv6 source address is 1234::1
619 IPv6 destination address is 4321::1
620 UDP source port and destination port are 1234
623 p = IPv6(src='1234::1', dst='4321::1') / UDP(sport=1234, dport=1234)
626 def create_packet_header_IPv6_SRH_IPv6(self, srcaddr, sidlist, segleft):
627 """Create packet header: IPv6 encapsulated in SRv6:
628 IPv6 header with SRH, IPv6 header, UDP header
630 :param int srcaddr: outer source address
631 :param list sidlist: segment list of outer IPv6 SRH
632 :param int segleft: segments-left field of outer IPv6 SRH
634 Outer IPv6 source address is set to srcaddr
635 Outer IPv6 destination address is set to sidlist[segleft]
636 Inner IPv6 source addresses is 1234::1
637 Inner IPv6 destination address is 4321::1
638 UDP source port and destination port are 1234
641 p = IPv6(src=srcaddr, dst=sidlist[segleft]) / \
642 IPv6ExtHdrSegmentRouting(addresses=sidlist,
643 segleft=segleft, nh=41) / \
644 IPv6(src='1234::1', dst='4321::1') / \
645 UDP(sport=1234, dport=1234)
648 def create_packet_header_IPv4(self):
649 """Create packet header: IPv4 header, UDP header
651 :param dst: IPv4 destination address
653 IPv4 source address is 123.1.1.1
654 IPv4 destination address is 124.1.1.1
655 UDP source port and destination port are 1234
658 p = IP(src='123.1.1.1', dst='124.1.1.1') / UDP(sport=1234, dport=1234)
661 def create_packet_header_IPv6_SRH_IPv4(self, srcaddr, sidlist, segleft):
662 """Create packet header: IPv4 encapsulated in SRv6:
663 IPv6 header with SRH, IPv4 header, UDP header
665 :param int srcaddr: outer source address
666 :param list sidlist: segment list of outer IPv6 SRH
667 :param int segleft: segments-left field of outer IPv6 SRH
669 Outer IPv6 source address is set to srcaddr
670 Outer IPv6 destination address is set to sidlist[segleft]
671 Inner IPv4 source address is 123.1.1.1
672 Inner IPv4 destination address is 124.1.1.1
673 UDP source port and destination port are 1234
676 p = IPv6(src=srcaddr, dst=sidlist[segleft]) / \
677 IPv6ExtHdrSegmentRouting(addresses=sidlist,
678 segleft=segleft, nh=4) / \
679 IP(src='123.1.1.1', dst='124.1.1.1') / \
680 UDP(sport=1234, dport=1234)
683 def create_packet_header_L2(self, vlan=0):
684 """Create packet header: L2 header
686 :param vlan: if vlan!=0 then add 802.1q header
688 # Note: the dst addr ('00:55:44:33:22:11') is used in
689 # the compare function compare_rx_tx_packet_T_Encaps_L2
690 # to detect presence of L2 in SRH payload
691 p = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
695 p /= Dot1Q(vlan=vlan, type=etype)
700 def create_packet_header_IPv6_SRH_L2(self, srcaddr, sidlist, segleft,
702 """Create packet header: L2 encapsulated in SRv6:
703 IPv6 header with SRH, L2
705 :param int srcaddr: IPv6 source address
706 :param list sidlist: segment list of outer IPv6 SRH
707 :param int segleft: segments-left field of outer IPv6 SRH
708 :param vlan: L2 vlan; if vlan!=0 then add 802.1q header
710 IPv6 source address is set to srcaddr
711 IPv6 destination address is set to sidlist[segleft]
713 eth = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
717 eth /= Dot1Q(vlan=vlan, type=etype)
721 p = IPv6(src=srcaddr, dst=sidlist[segleft]) / \
722 IPv6ExtHdrSegmentRouting(addresses=sidlist,
723 segleft=segleft, nh=59) / \
727 def get_payload_info(self, packet):
728 """ Extract the payload_info from the packet
730 # in most cases, payload_info is in packet[Raw]
731 # but packet[Raw] gives the complete payload
732 # (incl L2 header) for the T.Encaps L2 case
734 payload_info = self.payload_to_info(packet[Raw])
737 # remote L2 header from packet[Raw]:
738 # take packet[Raw], convert it to an Ether layer
739 # and then extract Raw from it
740 payload_info = self.payload_to_info(
741 Ether(scapy.compat.raw(packet[Raw]))[Raw])
745 def verify_captured_pkts(self, dst_if, capture, compare_func):
747 Verify captured packet stream for specified interface.
748 Compare ingress with egress packets using the specified compare fn
750 :param dst_if: egress interface of DUT
751 :param capture: captured packets
752 :param compare_func: function to compare in and out packet
754 self.logger.info("Verifying capture on interface %s using function %s"
755 % (dst_if.name, compare_func.__name__))
758 for i in self.pg_interfaces:
759 last_info[i.sw_if_index] = None
760 dst_sw_if_index = dst_if.sw_if_index
762 for packet in capture:
764 # extract payload_info from packet's payload
765 payload_info = self.get_payload_info(packet)
766 packet_index = payload_info.index
768 self.logger.debug("Verifying packet with index %d"
770 # packet should have arrived on the expected interface
771 self.assertEqual(payload_info.dst, dst_sw_if_index)
773 "Got packet on interface %s: src=%u (idx=%u)" %
774 (dst_if.name, payload_info.src, packet_index))
776 # search for payload_info with same src and dst if_index
777 # this will give us the transmitted packet
778 next_info = self.get_next_packet_info_for_interface2(
779 payload_info.src, dst_sw_if_index,
780 last_info[payload_info.src])
781 last_info[payload_info.src] = next_info
782 # next_info should not be None
783 self.assertTrue(next_info is not None)
784 # index of tx and rx packets should be equal
785 self.assertEqual(packet_index, next_info.index)
786 # data field of next_info contains the tx packet
787 txed_packet = next_info.data
789 self.logger.debug(ppp("Transmitted packet:",
790 txed_packet)) # ppp=Pretty Print Packet
792 self.logger.debug(ppp("Received packet:", packet))
794 # compare rcvd packet with expected packet using compare_func
795 compare_func(txed_packet, packet)
798 self.logger.error(ppp("Unexpected or invalid packet:", packet))
801 # have all expected packets arrived?
802 for i in self.pg_interfaces:
803 remaining_packet = self.get_next_packet_info_for_interface2(
804 i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
805 self.assertTrue(remaining_packet is None,
806 "Interface %s: Packet expected from interface %s "
807 "didn't arrive" % (dst_if.name, i.name))
810 if __name__ == '__main__':
811 unittest.main(testRunner=VppTestRunner)