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 """ Perform test setup before each test case.
34 super(TestSRv6, self).setUp()
36 # packet sizes, inclusive L2 overhead
37 self.pg_packet_sizes = [64, 512, 1518, 9018]
40 self.reset_packet_infos()
43 """ Clean up test setup after each test case.
45 self.teardown_interfaces()
47 super(TestSRv6, self).tearDown()
49 def configure_interface(self,
51 ipv6=False, ipv4=False,
52 ipv6_table_id=0, ipv4_table_id=0):
53 """ Configure interface.
54 :param ipv6: configure IPv6 on interface
55 :param ipv4: configure IPv4 on interface
56 :param ipv6_table_id: FIB table_id for IPv6
57 :param ipv4_table_id: FIB table_id for IPv4
59 self.logger.debug("Configuring interface %s" % (interface.name))
61 self.logger.debug("Configuring IPv6")
62 interface.set_table_ip6(ipv6_table_id)
63 interface.config_ip6()
64 interface.resolve_ndp(timeout=5)
66 self.logger.debug("Configuring IPv4")
67 interface.set_table_ip4(ipv4_table_id)
68 interface.config_ip4()
69 interface.resolve_arp()
72 def setup_interfaces(self, ipv6=[], ipv4=[],
73 ipv6_table_id=[], ipv4_table_id=[]):
74 """ Create and configure interfaces.
76 :param ipv6: list of interface IPv6 capabilities
77 :param ipv4: list of interface IPv4 capabilities
78 :param ipv6_table_id: list of intf IPv6 FIB table_ids
79 :param ipv4_table_id: list of intf IPv4 FIB table_ids
80 :returns: List of created interfaces.
82 # how many interfaces?
87 self.logger.debug("Creating and configuring %d interfaces" % (count))
89 # fill up ipv6 and ipv4 lists if needed
90 # not enabled (False) is the default
92 ipv6 += (count - len(ipv6)) * [False]
94 ipv4 += (count - len(ipv4)) * [False]
96 # fill up table_id lists if needed
97 # table_id 0 (global) is the default
98 if len(ipv6_table_id) < count:
99 ipv6_table_id += (count - len(ipv6_table_id)) * [0]
100 if len(ipv4_table_id) < count:
101 ipv4_table_id += (count - len(ipv4_table_id)) * [0]
103 # create 'count' pg interfaces
104 self.create_pg_interfaces(range(count))
106 # setup all interfaces
107 for i in range(count):
108 intf = self.pg_interfaces[i]
109 self.configure_interface(intf,
111 ipv6_table_id[i], ipv4_table_id[i])
114 self.logger.debug(self.vapi.cli("show ip6 neighbors"))
116 self.logger.debug(self.vapi.cli("show ip arp"))
117 self.logger.debug(self.vapi.cli("show interface"))
118 self.logger.debug(self.vapi.cli("show hardware"))
120 return self.pg_interfaces
122 def teardown_interfaces(self):
123 """ Unconfigure and bring down interface.
125 self.logger.debug("Tearing down interfaces")
126 # tear down all interfaces
127 # AFAIK they cannot be deleted
128 for i in self.pg_interfaces:
129 self.logger.debug("Tear down interface %s" % (i.name))
135 def test_SRv6_End_AD_IPv6(self):
136 """ Test SRv6 End.AD behavior with IPv6 traffic.
138 self.src_addr = 'a0::'
139 self.sid_list = ['a1::', 'a2::a6', 'a3::']
140 self.test_sid_index = 1
142 # send traffic to one destination interface
143 # source and destination interfaces are IPv6 only
144 self.setup_interfaces(ipv6=[True, True])
146 # configure route to next segment
147 route = VppIpRoute(self, self.sid_list[self.test_sid_index + 1], 128,
148 [VppRoutePath(self.pg0.remote_ip6,
149 self.pg0.sw_if_index,
150 proto=DpoProto.DPO_PROTO_IP6)],
152 route.add_vpp_config()
154 # configure SRv6 localSID behavior
155 cli_str = "sr localsid address " + \
156 self.sid_list[self.test_sid_index] + \
157 " behavior end.ad" + \
158 " nh " + self.pg1.remote_ip6 + \
159 " oif " + self.pg1.name + \
160 " iif " + self.pg1.name
161 self.vapi.cli(cli_str)
164 self.logger.debug(self.vapi.cli("show sr localsid"))
166 # send one packet per packet size
167 count = len(self.pg_packet_sizes)
169 # prepare IPv6 in SRv6 headers
170 packet_header1 = self.create_packet_header_IPv6_SRH_IPv6(
171 srcaddr=self.src_addr,
172 sidlist=self.sid_list[::-1],
173 segleft=len(self.sid_list) - self.test_sid_index - 1)
175 # generate packets (pg0->pg1)
176 pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
177 self.pg_packet_sizes, count)
179 # send packets and verify received packets
180 self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
181 self.compare_rx_tx_packet_End_AD_IPv6_out)
183 # log the localsid counters
184 self.logger.info(self.vapi.cli("show sr localsid"))
186 # prepare IPv6 header for returning packets
187 packet_header2 = self.create_packet_header_IPv6()
189 # generate returning packets (pg1->pg0)
190 pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
191 self.pg_packet_sizes, count)
193 # send packets and verify received packets
194 self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
195 self.compare_rx_tx_packet_End_AD_IPv6_in)
197 # log the localsid counters
198 self.logger.info(self.vapi.cli("show sr localsid"))
200 # remove SRv6 localSIDs
201 cli_str = "sr localsid del address " + \
202 self.sid_list[self.test_sid_index]
203 self.vapi.cli(cli_str)
206 self.teardown_interfaces()
208 def compare_rx_tx_packet_End_AD_IPv6_out(self, tx_pkt, rx_pkt):
209 """ Compare input and output packet after passing End.AD with IPv6
211 :param tx_pkt: transmitted packet
212 :param rx_pkt: received packet
215 # get first (outer) IPv6 header of rx'ed packet
216 rx_ip = rx_pkt.getlayer(IPv6)
218 tx_ip = tx_pkt.getlayer(IPv6)
219 tx_ip2 = tx_pkt.getlayer(IPv6, 2)
221 # verify if rx'ed packet has no SRH
222 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
224 # the whole rx_ip pkt should be equal to tx_ip2
225 # except for the hlim field
226 # -> adjust tx'ed hlim to expected hlim
227 tx_ip2.hlim = tx_ip2.hlim - 1
229 self.assertEqual(rx_ip, tx_ip2)
231 self.logger.debug("packet verification: SUCCESS")
233 def compare_rx_tx_packet_End_AD_IPv6_in(self, tx_pkt, rx_pkt):
234 """ Compare input and output packet after passing End.AD
236 :param tx_pkt: transmitted packet
237 :param rx_pkt: received packet
240 # get first (outer) IPv6 header of rx'ed packet
241 rx_ip = rx_pkt.getlayer(IPv6)
242 # received ip.src should be equal to SR Policy source
243 self.assertEqual(rx_ip.src, self.src_addr)
244 # received ip.dst should be equal to expected sidlist next segment
245 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
247 # rx'ed packet should have SRH
248 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
251 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
252 # rx'ed seglist should be equal to SID-list in reversed order
253 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
254 # segleft should be equal to previous segleft value minus 1
255 self.assertEqual(rx_srh.segleft,
256 len(self.sid_list) - self.test_sid_index - 2)
257 # lastentry should be equal to the SID-list length minus 1
258 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
260 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
261 # except for the hop-limit field
262 tx_ip = tx_pkt.getlayer(IPv6)
263 # -> update tx'ed hlim to the expected hlim
266 self.assertEqual(rx_srh.payload, tx_ip)
268 self.logger.debug("packet verification: SUCCESS")
270 def test_SRv6_End_AD_IPv4(self):
271 """ Test SRv6 End.AD behavior with IPv4 traffic.
273 self.src_addr = 'a0::'
274 self.sid_list = ['a1::', 'a2::a4', 'a3::']
275 self.test_sid_index = 1
277 # send traffic to one destination interface
278 # source and destination interfaces are IPv6 only
279 self.setup_interfaces(ipv6=[True, False], ipv4=[False, True])
281 # configure route to next segment
282 route = VppIpRoute(self, self.sid_list[self.test_sid_index + 1], 128,
283 [VppRoutePath(self.pg0.remote_ip6,
284 self.pg0.sw_if_index,
285 proto=DpoProto.DPO_PROTO_IP6)],
287 route.add_vpp_config()
289 # configure SRv6 localSID behavior
290 cli_str = "sr localsid address " + \
291 self.sid_list[self.test_sid_index] + \
292 " behavior end.ad" + \
293 " nh " + self.pg1.remote_ip4 + \
294 " oif " + self.pg1.name + \
295 " iif " + self.pg1.name
296 self.vapi.cli(cli_str)
299 self.logger.debug(self.vapi.cli("show sr localsid"))
301 # send one packet per packet size
302 count = len(self.pg_packet_sizes)
304 # prepare IPv4 in SRv6 headers
305 packet_header1 = self.create_packet_header_IPv6_SRH_IPv4(
306 srcaddr=self.src_addr,
307 sidlist=self.sid_list[::-1],
308 segleft=len(self.sid_list) - self.test_sid_index - 1)
310 # generate packets (pg0->pg1)
311 pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
312 self.pg_packet_sizes, count)
314 # send packets and verify received packets
315 self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
316 self.compare_rx_tx_packet_End_AD_IPv4_out)
318 # log the localsid counters
319 self.logger.info(self.vapi.cli("show sr localsid"))
321 # prepare IPv6 header for returning packets
322 packet_header2 = self.create_packet_header_IPv4()
324 # generate returning packets (pg1->pg0)
325 pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
326 self.pg_packet_sizes, count)
328 # send packets and verify received packets
329 self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
330 self.compare_rx_tx_packet_End_AD_IPv4_in)
332 # log the localsid counters
333 self.logger.info(self.vapi.cli("show sr localsid"))
335 # remove SRv6 localSIDs
336 cli_str = "sr localsid del address " + \
337 self.sid_list[self.test_sid_index]
338 self.vapi.cli(cli_str)
341 self.teardown_interfaces()
343 def compare_rx_tx_packet_End_AD_IPv4_out(self, tx_pkt, rx_pkt):
344 """ Compare input and output packet after passing End.AD with IPv4
346 :param tx_pkt: transmitted packet
347 :param rx_pkt: received packet
350 # get IPv4 header of rx'ed packet
351 rx_ip = rx_pkt.getlayer(IP)
353 tx_ip = tx_pkt.getlayer(IPv6)
354 tx_ip2 = tx_pkt.getlayer(IP)
356 # verify if rx'ed packet has no SRH
357 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
359 # the whole rx_ip pkt should be equal to tx_ip2
360 # except for the ttl field and ip checksum
361 # -> adjust tx'ed ttl to expected ttl
362 tx_ip2.ttl = tx_ip2.ttl - 1
363 # -> set tx'ed ip checksum to None and let scapy recompute
365 # read back the pkt (with str()) to force computing these fields
366 # probably other ways to accomplish this are possible
367 tx_ip2 = IP(scapy.compat.raw(tx_ip2))
369 self.assertEqual(rx_ip, tx_ip2)
371 self.logger.debug("packet verification: SUCCESS")
373 def compare_rx_tx_packet_End_AD_IPv4_in(self, tx_pkt, rx_pkt):
374 """ Compare input and output packet after passing End.AD
376 :param tx_pkt: transmitted packet
377 :param rx_pkt: received packet
380 # get first (outer) IPv6 header of rx'ed packet
381 rx_ip = rx_pkt.getlayer(IPv6)
382 # received ip.src should be equal to SR Policy source
383 self.assertEqual(rx_ip.src, self.src_addr)
384 # received ip.dst should be equal to expected sidlist next segment
385 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
387 # rx'ed packet should have SRH
388 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
391 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
392 # rx'ed seglist should be equal to SID-list in reversed order
393 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
394 # segleft should be equal to previous segleft value minus 1
395 self.assertEqual(rx_srh.segleft,
396 len(self.sid_list) - self.test_sid_index - 2)
397 # lastentry should be equal to the SID-list length minus 1
398 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
400 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
401 # except for the ttl field and ip checksum
402 tx_ip = tx_pkt.getlayer(IP)
403 # -> adjust tx'ed ttl to expected ttl
404 tx_ip.ttl = tx_ip.ttl - 1
405 # -> set tx'ed ip checksum to None and let scapy recompute
407 # -> read back the pkt (with str()) to force computing these fields
408 # probably other ways to accomplish this are possible
409 self.assertEqual(rx_srh.payload, IP(scapy.compat.raw(tx_ip)))
411 self.logger.debug("packet verification: SUCCESS")
413 def test_SRv6_End_AD_L2(self):
414 """ Test SRv6 End.AD behavior with L2 traffic.
416 self.src_addr = 'a0::'
417 self.sid_list = ['a1::', 'a2::a4', 'a3::']
418 self.test_sid_index = 1
420 # send traffic to one destination interface
421 # source and destination interfaces are IPv6 only
422 self.setup_interfaces(ipv6=[True, False])
424 # configure route to next segment
425 route = VppIpRoute(self, self.sid_list[self.test_sid_index + 1], 128,
426 [VppRoutePath(self.pg0.remote_ip6,
427 self.pg0.sw_if_index,
428 proto=DpoProto.DPO_PROTO_IP6)],
430 route.add_vpp_config()
432 # configure SRv6 localSID behavior
433 cli_str = "sr localsid address " + \
434 self.sid_list[self.test_sid_index] + \
435 " behavior end.ad" + \
436 " oif " + self.pg1.name + \
437 " iif " + self.pg1.name
438 self.vapi.cli(cli_str)
441 self.logger.debug(self.vapi.cli("show sr localsid"))
443 # send one packet per packet size
444 count = len(self.pg_packet_sizes)
446 # prepare L2 in SRv6 headers
447 packet_header1 = self.create_packet_header_IPv6_SRH_L2(
448 srcaddr=self.src_addr,
449 sidlist=self.sid_list[::-1],
450 segleft=len(self.sid_list) - self.test_sid_index - 1,
453 # generate packets (pg0->pg1)
454 pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
455 self.pg_packet_sizes, count)
457 # send packets and verify received packets
458 self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
459 self.compare_rx_tx_packet_End_AD_L2_out)
461 # log the localsid counters
462 self.logger.info(self.vapi.cli("show sr localsid"))
464 # prepare L2 header for returning packets
465 packet_header2 = self.create_packet_header_L2()
467 # generate returning packets (pg1->pg0)
468 pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
469 self.pg_packet_sizes, count)
471 # send packets and verify received packets
472 self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
473 self.compare_rx_tx_packet_End_AD_L2_in)
475 # log the localsid counters
476 self.logger.info(self.vapi.cli("show sr localsid"))
478 # remove SRv6 localSIDs
479 cli_str = "sr localsid del address " + \
480 self.sid_list[self.test_sid_index]
481 self.vapi.cli(cli_str)
484 self.teardown_interfaces()
486 def compare_rx_tx_packet_End_AD_L2_out(self, tx_pkt, rx_pkt):
487 """ Compare input and output packet after passing End.AD with L2
489 :param tx_pkt: transmitted packet
490 :param rx_pkt: received packet
493 # get IPv4 header of rx'ed packet
494 rx_eth = rx_pkt.getlayer(Ether)
496 tx_ip = tx_pkt.getlayer(IPv6)
497 # we can't just get the 2nd Ether layer
498 # get the Raw content and dissect it as Ether
499 tx_eth1 = Ether(scapy.compat.raw(tx_pkt[Raw]))
501 # verify if rx'ed packet has no SRH
502 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
504 # the whole rx_eth pkt should be equal to tx_eth1
505 self.assertEqual(rx_eth, tx_eth1)
507 self.logger.debug("packet verification: SUCCESS")
509 def compare_rx_tx_packet_End_AD_L2_in(self, tx_pkt, rx_pkt):
510 """ Compare input and output packet after passing End.AD
512 :param tx_pkt: transmitted packet
513 :param rx_pkt: received packet
517 # get first (outer) IPv6 header of rx'ed packet
518 rx_ip = rx_pkt.getlayer(IPv6)
519 # received ip.src should be equal to SR Policy source
520 self.assertEqual(rx_ip.src, self.src_addr)
521 # received ip.dst should be equal to expected sidlist next segment
522 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
524 # rx'ed packet should have SRH
525 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
528 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
529 # rx'ed seglist should be equal to SID-list in reversed order
530 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
531 # segleft should be equal to previous segleft value minus 1
532 self.assertEqual(rx_srh.segleft,
533 len(self.sid_list) - self.test_sid_index - 2)
534 # lastentry should be equal to the SID-list length minus 1
535 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
537 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
538 tx_ether = tx_pkt.getlayer(Ether)
539 self.assertEqual(Ether(scapy.compat.raw(rx_srh.payload)), tx_ether)
541 self.logger.debug("packet verification: SUCCESS")
543 def create_stream(self, src_if, dst_if, packet_header, packet_sizes,
545 """Create SRv6 input packet stream for defined interface.
547 :param VppInterface src_if: Interface to create packet stream for
548 :param VppInterface dst_if: destination interface of packet stream
549 :param packet_header: Layer3 scapy packet headers,
550 L2 is added when not provided,
551 Raw(payload) with packet_info is added
552 :param list packet_sizes: packet stream pckt sizes,sequentially applied
553 to packets in stream have
554 :param int count: number of packets in packet stream
555 :return: list of packets
557 self.logger.info("Creating packets")
559 for i in range(0, count - 1):
560 payload_info = self.create_packet_info(src_if, dst_if)
562 "Creating packet with index %d" % (payload_info.index))
563 payload = self.info_to_payload(payload_info)
564 # add L2 header if not yet provided in packet_header
565 if packet_header.getlayer(0).name == 'Ethernet':
566 p = packet_header / Raw(payload)
568 p = Ether(dst=src_if.local_mac, src=src_if.remote_mac) / \
569 packet_header / Raw(payload)
570 size = packet_sizes[i % len(packet_sizes)]
571 self.logger.debug("Packet size %d" % (size))
572 self.extend_packet(p, size)
573 # we need to store the packet with the automatic fields computed
574 # read back the dumped packet (with str())
575 # to force computing these fields
576 # probably other ways are possible
577 p = Ether(scapy.compat.raw(p))
578 payload_info.data = p.copy()
579 self.logger.debug(ppp("Created packet:", p))
581 self.logger.info("Done creating packets")
584 def send_and_verify_pkts(self, input, pkts, output, compare_func):
585 """Send packets and verify received packets using compare_func
587 :param input: ingress interface of DUT
588 :param pkts: list of packets to transmit
589 :param output: egress interface of DUT
590 :param compare_func: function to compare in and out packets
592 # add traffic stream to input interface
593 input.add_stream(pkts)
595 # enable capture on all interfaces
596 self.pg_enable_capture(self.pg_interfaces)
599 self.logger.info("Starting traffic")
603 self.logger.info("Getting packet capture")
604 capture = output.get_capture()
606 # assert nothing was captured on input interface
607 # input.assert_nothing_captured()
609 # verify captured packets
610 self.verify_captured_pkts(output, capture, compare_func)
612 def create_packet_header_IPv6(self):
613 """Create packet header: IPv6 header, UDP header
615 :param dst: IPv6 destination address
617 IPv6 source address is 1234::1
618 IPv6 destination address is 4321::1
619 UDP source port and destination port are 1234
622 p = IPv6(src='1234::1', dst='4321::1') / UDP(sport=1234, dport=1234)
625 def create_packet_header_IPv6_SRH_IPv6(self, srcaddr, sidlist, segleft):
626 """Create packet header: IPv6 encapsulated in SRv6:
627 IPv6 header with SRH, IPv6 header, UDP header
629 :param int srcaddr: outer source address
630 :param list sidlist: segment list of outer IPv6 SRH
631 :param int segleft: segments-left field of outer IPv6 SRH
633 Outer IPv6 source address is set to srcaddr
634 Outer IPv6 destination address is set to sidlist[segleft]
635 Inner IPv6 source addresses is 1234::1
636 Inner IPv6 destination address is 4321::1
637 UDP source port and destination port are 1234
640 p = IPv6(src=srcaddr, dst=sidlist[segleft]) / \
641 IPv6ExtHdrSegmentRouting(addresses=sidlist,
642 segleft=segleft, nh=41) / \
643 IPv6(src='1234::1', dst='4321::1') / \
644 UDP(sport=1234, dport=1234)
647 def create_packet_header_IPv4(self):
648 """Create packet header: IPv4 header, UDP header
650 :param dst: IPv4 destination address
652 IPv4 source address is 123.1.1.1
653 IPv4 destination address is 124.1.1.1
654 UDP source port and destination port are 1234
657 p = IP(src='123.1.1.1', dst='124.1.1.1') / UDP(sport=1234, dport=1234)
660 def create_packet_header_IPv6_SRH_IPv4(self, srcaddr, sidlist, segleft):
661 """Create packet header: IPv4 encapsulated in SRv6:
662 IPv6 header with SRH, IPv4 header, UDP header
664 :param int srcaddr: outer source address
665 :param list sidlist: segment list of outer IPv6 SRH
666 :param int segleft: segments-left field of outer IPv6 SRH
668 Outer IPv6 source address is set to srcaddr
669 Outer IPv6 destination address is set to sidlist[segleft]
670 Inner IPv4 source address is 123.1.1.1
671 Inner IPv4 destination address is 124.1.1.1
672 UDP source port and destination port are 1234
675 p = IPv6(src=srcaddr, dst=sidlist[segleft]) / \
676 IPv6ExtHdrSegmentRouting(addresses=sidlist,
677 segleft=segleft, nh=4) / \
678 IP(src='123.1.1.1', dst='124.1.1.1') / \
679 UDP(sport=1234, dport=1234)
682 def create_packet_header_L2(self, vlan=0):
683 """Create packet header: L2 header
685 :param vlan: if vlan!=0 then add 802.1q header
687 # Note: the dst addr ('00:55:44:33:22:11') is used in
688 # the compare function compare_rx_tx_packet_T_Encaps_L2
689 # to detect presence of L2 in SRH payload
690 p = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
694 p /= Dot1Q(vlan=vlan, type=etype)
699 def create_packet_header_IPv6_SRH_L2(self, srcaddr, sidlist, segleft,
701 """Create packet header: L2 encapsulated in SRv6:
702 IPv6 header with SRH, L2
704 :param int srcaddr: IPv6 source address
705 :param list sidlist: segment list of outer IPv6 SRH
706 :param int segleft: segments-left field of outer IPv6 SRH
707 :param vlan: L2 vlan; if vlan!=0 then add 802.1q header
709 IPv6 source address is set to srcaddr
710 IPv6 destination address is set to sidlist[segleft]
712 eth = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
716 eth /= Dot1Q(vlan=vlan, type=etype)
720 p = IPv6(src=srcaddr, dst=sidlist[segleft]) / \
721 IPv6ExtHdrSegmentRouting(addresses=sidlist,
722 segleft=segleft, nh=59) / \
726 def get_payload_info(self, packet):
727 """ Extract the payload_info from the packet
729 # in most cases, payload_info is in packet[Raw]
730 # but packet[Raw] gives the complete payload
731 # (incl L2 header) for the T.Encaps L2 case
733 payload_info = self.payload_to_info(packet[Raw])
736 # remote L2 header from packet[Raw]:
737 # take packet[Raw], convert it to an Ether layer
738 # and then extract Raw from it
739 payload_info = self.payload_to_info(
740 Ether(scapy.compat.raw(packet[Raw]))[Raw])
744 def verify_captured_pkts(self, dst_if, capture, compare_func):
746 Verify captured packet stream for specified interface.
747 Compare ingress with egress packets using the specified compare fn
749 :param dst_if: egress interface of DUT
750 :param capture: captured packets
751 :param compare_func: function to compare in and out packet
753 self.logger.info("Verifying capture on interface %s using function %s"
754 % (dst_if.name, compare_func.__name__))
757 for i in self.pg_interfaces:
758 last_info[i.sw_if_index] = None
759 dst_sw_if_index = dst_if.sw_if_index
761 for packet in capture:
763 # extract payload_info from packet's payload
764 payload_info = self.get_payload_info(packet)
765 packet_index = payload_info.index
767 self.logger.debug("Verifying packet with index %d"
769 # packet should have arrived on the expected interface
770 self.assertEqual(payload_info.dst, dst_sw_if_index)
772 "Got packet on interface %s: src=%u (idx=%u)" %
773 (dst_if.name, payload_info.src, packet_index))
775 # search for payload_info with same src and dst if_index
776 # this will give us the transmitted packet
777 next_info = self.get_next_packet_info_for_interface2(
778 payload_info.src, dst_sw_if_index,
779 last_info[payload_info.src])
780 last_info[payload_info.src] = next_info
781 # next_info should not be None
782 self.assertTrue(next_info is not None)
783 # index of tx and rx packets should be equal
784 self.assertEqual(packet_index, next_info.index)
785 # data field of next_info contains the tx packet
786 txed_packet = next_info.data
788 self.logger.debug(ppp("Transmitted packet:",
789 txed_packet)) # ppp=Pretty Print Packet
791 self.logger.debug(ppp("Received packet:", packet))
793 # compare rcvd packet with expected packet using compare_func
794 compare_func(txed_packet, packet)
797 self.logger.error(ppp("Unexpected or invalid packet:", packet))
800 # have all expected packets arrived?
801 for i in self.pg_interfaces:
802 remaining_packet = self.get_next_packet_info_for_interface2(
803 i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
804 self.assertTrue(remaining_packet is None,
805 "Interface %s: Packet expected from interface %s "
806 "didn't arrive" % (dst_if.name, i.name))
809 if __name__ == '__main__':
810 unittest.main(testRunner=VppTestRunner)