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)],
156 route.add_vpp_config()
158 # configure SRv6 localSID behavior
159 cli_str = "sr localsid address " + \
160 self.sid_list[self.test_sid_index] + \
161 " behavior end.ad" + \
162 " nh " + self.pg1.remote_ip6 + \
163 " oif " + self.pg1.name + \
164 " iif " + self.pg1.name
165 self.vapi.cli(cli_str)
168 self.logger.debug(self.vapi.cli("show sr localsid"))
170 # send one packet per packet size
171 count = len(self.pg_packet_sizes)
173 # prepare IPv6 in SRv6 headers
174 packet_header1 = self.create_packet_header_IPv6_SRH_IPv6(
175 srcaddr=self.src_addr,
176 sidlist=self.sid_list[::-1],
177 segleft=len(self.sid_list) - self.test_sid_index - 1)
179 # generate packets (pg0->pg1)
180 pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
181 self.pg_packet_sizes, count)
183 # send packets and verify received packets
184 self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
185 self.compare_rx_tx_packet_End_AD_IPv6_out)
187 # log the localsid counters
188 self.logger.info(self.vapi.cli("show sr localsid"))
190 # prepare IPv6 header for returning packets
191 packet_header2 = self.create_packet_header_IPv6()
193 # generate returning packets (pg1->pg0)
194 pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
195 self.pg_packet_sizes, count)
197 # send packets and verify received packets
198 self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
199 self.compare_rx_tx_packet_End_AD_IPv6_in)
201 # log the localsid counters
202 self.logger.info(self.vapi.cli("show sr localsid"))
204 # remove SRv6 localSIDs
205 cli_str = "sr localsid del address " + \
206 self.sid_list[self.test_sid_index]
207 self.vapi.cli(cli_str)
210 self.teardown_interfaces()
212 def compare_rx_tx_packet_End_AD_IPv6_out(self, tx_pkt, rx_pkt):
213 """ Compare input and output packet after passing End.AD with IPv6
215 :param tx_pkt: transmitted packet
216 :param rx_pkt: received packet
219 # get first (outer) IPv6 header of rx'ed packet
220 rx_ip = rx_pkt.getlayer(IPv6)
222 tx_ip = tx_pkt.getlayer(IPv6)
223 tx_ip2 = tx_pkt.getlayer(IPv6, 2)
225 # verify if rx'ed packet has no SRH
226 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
228 # the whole rx_ip pkt should be equal to tx_ip2
229 # except for the hlim field
230 # -> adjust tx'ed hlim to expected hlim
231 tx_ip2.hlim = tx_ip2.hlim - 1
233 self.assertEqual(rx_ip, tx_ip2)
235 self.logger.debug("packet verification: SUCCESS")
237 def compare_rx_tx_packet_End_AD_IPv6_in(self, tx_pkt, rx_pkt):
238 """ Compare input and output packet after passing End.AD
240 :param tx_pkt: transmitted packet
241 :param rx_pkt: received packet
244 # get first (outer) IPv6 header of rx'ed packet
245 rx_ip = rx_pkt.getlayer(IPv6)
246 # received ip.src should be equal to SR Policy source
247 self.assertEqual(rx_ip.src, self.src_addr)
248 # received ip.dst should be equal to expected sidlist next segment
249 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
251 # rx'ed packet should have SRH
252 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
255 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
256 # rx'ed seglist should be equal to SID-list in reversed order
257 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
258 # segleft should be equal to previous segleft value minus 1
259 self.assertEqual(rx_srh.segleft,
260 len(self.sid_list) - self.test_sid_index - 2)
261 # lastentry should be equal to the SID-list length minus 1
262 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
264 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
265 # except for the hop-limit field
266 tx_ip = tx_pkt.getlayer(IPv6)
267 # -> update tx'ed hlim to the expected hlim
270 self.assertEqual(rx_srh.payload, tx_ip)
272 self.logger.debug("packet verification: SUCCESS")
274 def test_SRv6_End_AD_IPv4(self):
275 """ Test SRv6 End.AD behavior with IPv4 traffic.
277 self.src_addr = 'a0::'
278 self.sid_list = ['a1::', 'a2::a4', 'a3::']
279 self.test_sid_index = 1
281 # send traffic to one destination interface
282 # source and destination interfaces are IPv6 only
283 self.setup_interfaces(ipv6=[True, False], ipv4=[False, True])
285 # configure route to next segment
286 route = VppIpRoute(self, self.sid_list[self.test_sid_index + 1], 128,
287 [VppRoutePath(self.pg0.remote_ip6,
288 self.pg0.sw_if_index,
289 proto=DpoProto.DPO_PROTO_IP6)],
291 route.add_vpp_config()
293 # configure SRv6 localSID behavior
294 cli_str = "sr localsid address " + \
295 self.sid_list[self.test_sid_index] + \
296 " behavior end.ad" + \
297 " nh " + self.pg1.remote_ip4 + \
298 " oif " + self.pg1.name + \
299 " iif " + self.pg1.name
300 self.vapi.cli(cli_str)
303 self.logger.debug(self.vapi.cli("show sr localsid"))
305 # send one packet per packet size
306 count = len(self.pg_packet_sizes)
308 # prepare IPv4 in SRv6 headers
309 packet_header1 = self.create_packet_header_IPv6_SRH_IPv4(
310 srcaddr=self.src_addr,
311 sidlist=self.sid_list[::-1],
312 segleft=len(self.sid_list) - self.test_sid_index - 1)
314 # generate packets (pg0->pg1)
315 pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
316 self.pg_packet_sizes, count)
318 # send packets and verify received packets
319 self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
320 self.compare_rx_tx_packet_End_AD_IPv4_out)
322 # log the localsid counters
323 self.logger.info(self.vapi.cli("show sr localsid"))
325 # prepare IPv6 header for returning packets
326 packet_header2 = self.create_packet_header_IPv4()
328 # generate returning packets (pg1->pg0)
329 pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
330 self.pg_packet_sizes, count)
332 # send packets and verify received packets
333 self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
334 self.compare_rx_tx_packet_End_AD_IPv4_in)
336 # log the localsid counters
337 self.logger.info(self.vapi.cli("show sr localsid"))
339 # remove SRv6 localSIDs
340 cli_str = "sr localsid del address " + \
341 self.sid_list[self.test_sid_index]
342 self.vapi.cli(cli_str)
345 self.teardown_interfaces()
347 def compare_rx_tx_packet_End_AD_IPv4_out(self, tx_pkt, rx_pkt):
348 """ Compare input and output packet after passing End.AD with IPv4
350 :param tx_pkt: transmitted packet
351 :param rx_pkt: received packet
354 # get IPv4 header of rx'ed packet
355 rx_ip = rx_pkt.getlayer(IP)
357 tx_ip = tx_pkt.getlayer(IPv6)
358 tx_ip2 = tx_pkt.getlayer(IP)
360 # verify if rx'ed packet has no SRH
361 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
363 # the whole rx_ip pkt should be equal to tx_ip2
364 # except for the ttl field and ip checksum
365 # -> adjust tx'ed ttl to expected ttl
366 tx_ip2.ttl = tx_ip2.ttl - 1
367 # -> set tx'ed ip checksum to None and let scapy recompute
369 # read back the pkt (with str()) to force computing these fields
370 # probably other ways to accomplish this are possible
371 tx_ip2 = IP(scapy.compat.raw(tx_ip2))
373 self.assertEqual(rx_ip, tx_ip2)
375 self.logger.debug("packet verification: SUCCESS")
377 def compare_rx_tx_packet_End_AD_IPv4_in(self, tx_pkt, rx_pkt):
378 """ Compare input and output packet after passing End.AD
380 :param tx_pkt: transmitted packet
381 :param rx_pkt: received packet
384 # get first (outer) IPv6 header of rx'ed packet
385 rx_ip = rx_pkt.getlayer(IPv6)
386 # received ip.src should be equal to SR Policy source
387 self.assertEqual(rx_ip.src, self.src_addr)
388 # received ip.dst should be equal to expected sidlist next segment
389 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
391 # rx'ed packet should have SRH
392 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
395 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
396 # rx'ed seglist should be equal to SID-list in reversed order
397 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
398 # segleft should be equal to previous segleft value minus 1
399 self.assertEqual(rx_srh.segleft,
400 len(self.sid_list) - self.test_sid_index - 2)
401 # lastentry should be equal to the SID-list length minus 1
402 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
404 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
405 # except for the ttl field and ip checksum
406 tx_ip = tx_pkt.getlayer(IP)
407 # -> adjust tx'ed ttl to expected ttl
408 tx_ip.ttl = tx_ip.ttl - 1
409 # -> set tx'ed ip checksum to None and let scapy recompute
411 # -> read back the pkt (with str()) to force computing these fields
412 # probably other ways to accomplish this are possible
413 self.assertEqual(rx_srh.payload, IP(scapy.compat.raw(tx_ip)))
415 self.logger.debug("packet verification: SUCCESS")
417 def test_SRv6_End_AD_L2(self):
418 """ Test SRv6 End.AD behavior with L2 traffic.
420 self.src_addr = 'a0::'
421 self.sid_list = ['a1::', 'a2::a4', 'a3::']
422 self.test_sid_index = 1
424 # send traffic to one destination interface
425 # source and destination interfaces are IPv6 only
426 self.setup_interfaces(ipv6=[True, False])
428 # configure route to next segment
429 route = VppIpRoute(self, self.sid_list[self.test_sid_index + 1], 128,
430 [VppRoutePath(self.pg0.remote_ip6,
431 self.pg0.sw_if_index,
432 proto=DpoProto.DPO_PROTO_IP6)],
434 route.add_vpp_config()
436 # configure SRv6 localSID behavior
437 cli_str = "sr localsid address " + \
438 self.sid_list[self.test_sid_index] + \
439 " behavior end.ad" + \
440 " oif " + self.pg1.name + \
441 " iif " + self.pg1.name
442 self.vapi.cli(cli_str)
445 self.logger.debug(self.vapi.cli("show sr localsid"))
447 # send one packet per packet size
448 count = len(self.pg_packet_sizes)
450 # prepare L2 in SRv6 headers
451 packet_header1 = self.create_packet_header_IPv6_SRH_L2(
452 srcaddr=self.src_addr,
453 sidlist=self.sid_list[::-1],
454 segleft=len(self.sid_list) - self.test_sid_index - 1,
457 # generate packets (pg0->pg1)
458 pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
459 self.pg_packet_sizes, count)
461 # send packets and verify received packets
462 self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
463 self.compare_rx_tx_packet_End_AD_L2_out)
465 # log the localsid counters
466 self.logger.info(self.vapi.cli("show sr localsid"))
468 # prepare L2 header for returning packets
469 packet_header2 = self.create_packet_header_L2()
471 # generate returning packets (pg1->pg0)
472 pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
473 self.pg_packet_sizes, count)
475 # send packets and verify received packets
476 self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
477 self.compare_rx_tx_packet_End_AD_L2_in)
479 # log the localsid counters
480 self.logger.info(self.vapi.cli("show sr localsid"))
482 # remove SRv6 localSIDs
483 cli_str = "sr localsid del address " + \
484 self.sid_list[self.test_sid_index]
485 self.vapi.cli(cli_str)
488 self.teardown_interfaces()
490 def compare_rx_tx_packet_End_AD_L2_out(self, tx_pkt, rx_pkt):
491 """ Compare input and output packet after passing End.AD with L2
493 :param tx_pkt: transmitted packet
494 :param rx_pkt: received packet
497 # get IPv4 header of rx'ed packet
498 rx_eth = rx_pkt.getlayer(Ether)
500 tx_ip = tx_pkt.getlayer(IPv6)
501 # we can't just get the 2nd Ether layer
502 # get the Raw content and dissect it as Ether
503 tx_eth1 = Ether(scapy.compat.raw(tx_pkt[Raw]))
505 # verify if rx'ed packet has no SRH
506 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
508 # the whole rx_eth pkt should be equal to tx_eth1
509 self.assertEqual(rx_eth, tx_eth1)
511 self.logger.debug("packet verification: SUCCESS")
513 def compare_rx_tx_packet_End_AD_L2_in(self, tx_pkt, rx_pkt):
514 """ Compare input and output packet after passing End.AD
516 :param tx_pkt: transmitted packet
517 :param rx_pkt: received packet
521 # get first (outer) IPv6 header of rx'ed packet
522 rx_ip = rx_pkt.getlayer(IPv6)
523 # received ip.src should be equal to SR Policy source
524 self.assertEqual(rx_ip.src, self.src_addr)
525 # received ip.dst should be equal to expected sidlist next segment
526 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
528 # rx'ed packet should have SRH
529 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
532 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
533 # rx'ed seglist should be equal to SID-list in reversed order
534 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
535 # segleft should be equal to previous segleft value minus 1
536 self.assertEqual(rx_srh.segleft,
537 len(self.sid_list) - self.test_sid_index - 2)
538 # lastentry should be equal to the SID-list length minus 1
539 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
541 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
542 tx_ether = tx_pkt.getlayer(Ether)
543 self.assertEqual(Ether(scapy.compat.raw(rx_srh.payload)), tx_ether)
545 self.logger.debug("packet verification: SUCCESS")
547 def create_stream(self, src_if, dst_if, packet_header, packet_sizes,
549 """Create SRv6 input packet stream for defined interface.
551 :param VppInterface src_if: Interface to create packet stream for
552 :param VppInterface dst_if: destination interface of packet stream
553 :param packet_header: Layer3 scapy packet headers,
554 L2 is added when not provided,
555 Raw(payload) with packet_info is added
556 :param list packet_sizes: packet stream pckt sizes,sequentially applied
557 to packets in stream have
558 :param int count: number of packets in packet stream
559 :return: list of packets
561 self.logger.info("Creating packets")
563 for i in range(0, count - 1):
564 payload_info = self.create_packet_info(src_if, dst_if)
566 "Creating packet with index %d" % (payload_info.index))
567 payload = self.info_to_payload(payload_info)
568 # add L2 header if not yet provided in packet_header
569 if packet_header.getlayer(0).name == 'Ethernet':
570 p = packet_header / Raw(payload)
572 p = Ether(dst=src_if.local_mac, src=src_if.remote_mac) / \
573 packet_header / Raw(payload)
574 size = packet_sizes[i % len(packet_sizes)]
575 self.logger.debug("Packet size %d" % (size))
576 self.extend_packet(p, size)
577 # we need to store the packet with the automatic fields computed
578 # read back the dumped packet (with str())
579 # to force computing these fields
580 # probably other ways are possible
581 p = Ether(scapy.compat.raw(p))
582 payload_info.data = p.copy()
583 self.logger.debug(ppp("Created packet:", p))
585 self.logger.info("Done creating packets")
588 def send_and_verify_pkts(self, input, pkts, output, compare_func):
589 """Send packets and verify received packets using compare_func
591 :param input: ingress interface of DUT
592 :param pkts: list of packets to transmit
593 :param output: egress interface of DUT
594 :param compare_func: function to compare in and out packets
596 # add traffic stream to input interface
597 input.add_stream(pkts)
599 # enable capture on all interfaces
600 self.pg_enable_capture(self.pg_interfaces)
603 self.logger.info("Starting traffic")
607 self.logger.info("Getting packet capture")
608 capture = output.get_capture()
610 # assert nothing was captured on input interface
611 # input.assert_nothing_captured()
613 # verify captured packets
614 self.verify_captured_pkts(output, capture, compare_func)
616 def create_packet_header_IPv6(self):
617 """Create packet header: IPv6 header, UDP header
619 :param dst: IPv6 destination address
621 IPv6 source address is 1234::1
622 IPv6 destination address is 4321::1
623 UDP source port and destination port are 1234
626 p = IPv6(src='1234::1', dst='4321::1') / UDP(sport=1234, dport=1234)
629 def create_packet_header_IPv6_SRH_IPv6(self, srcaddr, sidlist, segleft):
630 """Create packet header: IPv6 encapsulated in SRv6:
631 IPv6 header with SRH, IPv6 header, UDP header
633 :param int srcaddr: outer source address
634 :param list sidlist: segment list of outer IPv6 SRH
635 :param int segleft: segments-left field of outer IPv6 SRH
637 Outer IPv6 source address is set to srcaddr
638 Outer IPv6 destination address is set to sidlist[segleft]
639 Inner IPv6 source addresses is 1234::1
640 Inner IPv6 destination address is 4321::1
641 UDP source port and destination port are 1234
644 p = IPv6(src=srcaddr, dst=sidlist[segleft]) / \
645 IPv6ExtHdrSegmentRouting(addresses=sidlist,
646 segleft=segleft, nh=41) / \
647 IPv6(src='1234::1', dst='4321::1') / \
648 UDP(sport=1234, dport=1234)
651 def create_packet_header_IPv4(self):
652 """Create packet header: IPv4 header, UDP header
654 :param dst: IPv4 destination address
656 IPv4 source address is 123.1.1.1
657 IPv4 destination address is 124.1.1.1
658 UDP source port and destination port are 1234
661 p = IP(src='123.1.1.1', dst='124.1.1.1') / UDP(sport=1234, dport=1234)
664 def create_packet_header_IPv6_SRH_IPv4(self, srcaddr, sidlist, segleft):
665 """Create packet header: IPv4 encapsulated in SRv6:
666 IPv6 header with SRH, IPv4 header, UDP header
668 :param int srcaddr: outer source address
669 :param list sidlist: segment list of outer IPv6 SRH
670 :param int segleft: segments-left field of outer IPv6 SRH
672 Outer IPv6 source address is set to srcaddr
673 Outer IPv6 destination address is set to sidlist[segleft]
674 Inner IPv4 source address is 123.1.1.1
675 Inner IPv4 destination address is 124.1.1.1
676 UDP source port and destination port are 1234
679 p = IPv6(src=srcaddr, dst=sidlist[segleft]) / \
680 IPv6ExtHdrSegmentRouting(addresses=sidlist,
681 segleft=segleft, nh=4) / \
682 IP(src='123.1.1.1', dst='124.1.1.1') / \
683 UDP(sport=1234, dport=1234)
686 def create_packet_header_L2(self, vlan=0):
687 """Create packet header: L2 header
689 :param vlan: if vlan!=0 then add 802.1q header
691 # Note: the dst addr ('00:55:44:33:22:11') is used in
692 # the compare function compare_rx_tx_packet_T_Encaps_L2
693 # to detect presence of L2 in SRH payload
694 p = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
698 p /= Dot1Q(vlan=vlan, type=etype)
703 def create_packet_header_IPv6_SRH_L2(self, srcaddr, sidlist, segleft,
705 """Create packet header: L2 encapsulated in SRv6:
706 IPv6 header with SRH, L2
708 :param int srcaddr: IPv6 source address
709 :param list sidlist: segment list of outer IPv6 SRH
710 :param int segleft: segments-left field of outer IPv6 SRH
711 :param vlan: L2 vlan; if vlan!=0 then add 802.1q header
713 IPv6 source address is set to srcaddr
714 IPv6 destination address is set to sidlist[segleft]
716 eth = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
720 eth /= Dot1Q(vlan=vlan, type=etype)
724 p = IPv6(src=srcaddr, dst=sidlist[segleft]) / \
725 IPv6ExtHdrSegmentRouting(addresses=sidlist,
726 segleft=segleft, nh=59) / \
730 def get_payload_info(self, packet):
731 """ Extract the payload_info from the packet
733 # in most cases, payload_info is in packet[Raw]
734 # but packet[Raw] gives the complete payload
735 # (incl L2 header) for the T.Encaps L2 case
737 payload_info = self.payload_to_info(packet[Raw])
740 # remote L2 header from packet[Raw]:
741 # take packet[Raw], convert it to an Ether layer
742 # and then extract Raw from it
743 payload_info = self.payload_to_info(
744 Ether(scapy.compat.raw(packet[Raw]))[Raw])
748 def verify_captured_pkts(self, dst_if, capture, compare_func):
750 Verify captured packet stream for specified interface.
751 Compare ingress with egress packets using the specified compare fn
753 :param dst_if: egress interface of DUT
754 :param capture: captured packets
755 :param compare_func: function to compare in and out packet
757 self.logger.info("Verifying capture on interface %s using function %s"
758 % (dst_if.name, compare_func.__name__))
761 for i in self.pg_interfaces:
762 last_info[i.sw_if_index] = None
763 dst_sw_if_index = dst_if.sw_if_index
765 for packet in capture:
767 # extract payload_info from packet's payload
768 payload_info = self.get_payload_info(packet)
769 packet_index = payload_info.index
771 self.logger.debug("Verifying packet with index %d"
773 # packet should have arrived on the expected interface
774 self.assertEqual(payload_info.dst, dst_sw_if_index)
776 "Got packet on interface %s: src=%u (idx=%u)" %
777 (dst_if.name, payload_info.src, packet_index))
779 # search for payload_info with same src and dst if_index
780 # this will give us the transmitted packet
781 next_info = self.get_next_packet_info_for_interface2(
782 payload_info.src, dst_sw_if_index,
783 last_info[payload_info.src])
784 last_info[payload_info.src] = next_info
785 # next_info should not be None
786 self.assertTrue(next_info is not None)
787 # index of tx and rx packets should be equal
788 self.assertEqual(packet_index, next_info.index)
789 # data field of next_info contains the tx packet
790 txed_packet = next_info.data
792 self.logger.debug(ppp("Transmitted packet:",
793 txed_packet)) # ppp=Pretty Print Packet
795 self.logger.debug(ppp("Received packet:", packet))
797 # compare rcvd packet with expected packet using compare_func
798 compare_func(txed_packet, packet)
801 self.logger.error(ppp("Unexpected or invalid packet:", packet))
804 # have all expected packets arrived?
805 for i in self.pg_interfaces:
806 remaining_packet = self.get_next_packet_info_for_interface2(
807 i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
808 self.assertTrue(remaining_packet is None,
809 "Interface %s: Packet expected from interface %s "
810 "didn't arrive" % (dst_if.name, i.name))
813 if __name__ == '__main__':
814 unittest.main(testRunner=VppTestRunner)