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 (
11 SRv6LocalSIDBehaviors,
16 SRv6PolicySteeringTypes,
20 from scapy.packet import Raw
21 from scapy.layers.l2 import Ether, Dot1Q
22 from scapy.layers.inet6 import IPv6, UDP, IPv6ExtHdrSegmentRouting
23 from scapy.layers.inet import IP, UDP
28 class TestSRv6Ad(VppTestCase):
29 """SRv6 Dynamic Proxy plugin Test Case"""
33 super(TestSRv6Ad, self).setUpClass()
36 def tearDownClass(cls):
37 super(TestSRv6Ad, cls).tearDownClass()
40 """Perform test setup before each test case."""
41 super(TestSRv6Ad, self).setUp()
43 # packet sizes, inclusive L2 overhead
44 self.pg_packet_sizes = [64, 512, 1518, 9018]
47 self.reset_packet_infos()
50 """Clean up test setup after each test case."""
51 self.teardown_interfaces()
53 super(TestSRv6Ad, self).tearDown()
55 def configure_interface(
56 self, interface, ipv6=False, ipv4=False, ipv6_table_id=0, ipv4_table_id=0
58 """Configure interface.
59 :param ipv6: configure IPv6 on interface
60 :param ipv4: configure IPv4 on interface
61 :param ipv6_table_id: FIB table_id for IPv6
62 :param ipv4_table_id: FIB table_id for IPv4
64 self.logger.debug("Configuring interface %s" % (interface.name))
66 self.logger.debug("Configuring IPv6")
67 interface.set_table_ip6(ipv6_table_id)
68 interface.config_ip6()
69 interface.resolve_ndp(timeout=5)
71 self.logger.debug("Configuring IPv4")
72 interface.set_table_ip4(ipv4_table_id)
73 interface.config_ip4()
74 interface.resolve_arp()
77 def setup_interfaces(self, ipv6=[], ipv4=[], 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(
114 intf, ipv6[i], ipv4[i], 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 ip4 neighbors"))
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."""
128 self.logger.debug("Tearing down interfaces")
129 # tear down all interfaces
130 # AFAIK they cannot be deleted
131 for i in self.pg_interfaces:
132 self.logger.debug("Tear down interface %s" % (i.name))
138 def test_SRv6_End_AD_IPv6(self):
139 """Test SRv6 End.AD behavior with IPv6 traffic."""
140 self.src_addr = "a0::"
141 self.sid_list = ["a1::", "a2::a6", "a3::"]
142 self.test_sid_index = 1
144 # send traffic to one destination interface
145 # source and destination interfaces are IPv6 only
146 self.setup_interfaces(ipv6=[True, True])
148 # configure route to next segment
151 self.sid_list[self.test_sid_index + 1],
156 self.pg0.sw_if_index,
157 proto=DpoProto.DPO_PROTO_IP6,
161 route.add_vpp_config()
163 # configure SRv6 localSID behavior
165 "sr localsid address "
166 + self.sid_list[self.test_sid_index]
169 + self.pg1.remote_ip6
175 self.vapi.cli(cli_str)
178 self.logger.debug(self.vapi.cli("show sr localsid"))
180 # send one packet per packet size
181 count = len(self.pg_packet_sizes)
183 # prepare IPv6 in SRv6 headers
184 packet_header1 = self.create_packet_header_IPv6_SRH_IPv6(
185 srcaddr=self.src_addr,
186 sidlist=self.sid_list[::-1],
187 segleft=len(self.sid_list) - self.test_sid_index - 1,
190 # generate packets (pg0->pg1)
191 pkts1 = self.create_stream(
192 self.pg0, self.pg1, packet_header1, self.pg_packet_sizes, count
195 # send packets and verify received packets
196 self.send_and_verify_pkts(
197 self.pg0, pkts1, self.pg1, self.compare_rx_tx_packet_End_AD_IPv6_out
200 # log the localsid counters
201 self.logger.info(self.vapi.cli("show sr localsid"))
203 # prepare IPv6 header for returning packets
204 packet_header2 = self.create_packet_header_IPv6()
206 # generate returning packets (pg1->pg0)
207 pkts2 = self.create_stream(
208 self.pg1, self.pg0, packet_header2, self.pg_packet_sizes, count
211 # send packets and verify received packets
212 self.send_and_verify_pkts(
213 self.pg1, pkts2, self.pg0, self.compare_rx_tx_packet_End_AD_IPv6_in
216 # log the localsid counters
217 self.logger.info(self.vapi.cli("show sr localsid"))
219 # remove SRv6 localSIDs
220 cli_str = "sr localsid del address " + self.sid_list[self.test_sid_index]
221 self.vapi.cli(cli_str)
224 self.teardown_interfaces()
226 def compare_rx_tx_packet_End_AD_IPv6_out(self, tx_pkt, rx_pkt):
227 """Compare input and output packet after passing End.AD with IPv6
229 :param tx_pkt: transmitted packet
230 :param rx_pkt: received packet
233 # get first (outer) IPv6 header of rx'ed packet
234 rx_ip = rx_pkt.getlayer(IPv6)
236 tx_ip = tx_pkt.getlayer(IPv6)
237 tx_ip2 = tx_pkt.getlayer(IPv6, 2)
239 # verify if rx'ed packet has no SRH
240 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
242 # the whole rx_ip pkt should be equal to tx_ip2
243 # except for the hlim field
244 # -> adjust tx'ed hlim to expected hlim
245 tx_ip2.hlim = tx_ip2.hlim - 1
247 self.assertEqual(rx_ip, tx_ip2)
249 self.logger.debug("packet verification: SUCCESS")
251 def compare_rx_tx_packet_End_AD_IPv6_in(self, tx_pkt, rx_pkt):
252 """Compare input and output packet after passing End.AD
254 :param tx_pkt: transmitted packet
255 :param rx_pkt: received packet
258 # get first (outer) IPv6 header of rx'ed packet
259 rx_ip = rx_pkt.getlayer(IPv6)
260 # received ip.src should be equal to SR Policy source
261 self.assertEqual(rx_ip.src, self.src_addr)
262 # received ip.dst should be equal to expected sidlist next segment
263 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
265 # rx'ed packet should have SRH
266 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
269 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
270 # rx'ed seglist should be equal to SID-list in reversed order
271 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
272 # segleft should be equal to previous segleft value minus 1
273 self.assertEqual(rx_srh.segleft, len(self.sid_list) - self.test_sid_index - 2)
274 # lastentry should be equal to the SID-list length minus 1
275 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
277 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
278 # except for the hop-limit field
279 tx_ip = tx_pkt.getlayer(IPv6)
280 # -> update tx'ed hlim to the expected hlim
283 self.assertEqual(rx_srh.payload, tx_ip)
285 self.logger.debug("packet verification: SUCCESS")
287 def test_SRv6_End_AD_IPv4(self):
288 """Test SRv6 End.AD behavior with IPv4 traffic."""
289 self.src_addr = "a0::"
290 self.sid_list = ["a1::", "a2::a4", "a3::"]
291 self.test_sid_index = 1
293 # send traffic to one destination interface
294 # source and destination interfaces are IPv6 only
295 self.setup_interfaces(ipv6=[True, False], ipv4=[False, True])
297 # configure route to next segment
300 self.sid_list[self.test_sid_index + 1],
305 self.pg0.sw_if_index,
306 proto=DpoProto.DPO_PROTO_IP6,
310 route.add_vpp_config()
312 # configure SRv6 localSID behavior
314 "sr localsid address "
315 + self.sid_list[self.test_sid_index]
318 + self.pg1.remote_ip4
324 self.vapi.cli(cli_str)
327 self.logger.debug(self.vapi.cli("show sr localsid"))
329 # send one packet per packet size
330 count = len(self.pg_packet_sizes)
332 # prepare IPv4 in SRv6 headers
333 packet_header1 = self.create_packet_header_IPv6_SRH_IPv4(
334 srcaddr=self.src_addr,
335 sidlist=self.sid_list[::-1],
336 segleft=len(self.sid_list) - self.test_sid_index - 1,
339 # generate packets (pg0->pg1)
340 pkts1 = self.create_stream(
341 self.pg0, self.pg1, packet_header1, self.pg_packet_sizes, count
344 # send packets and verify received packets
345 self.send_and_verify_pkts(
346 self.pg0, pkts1, self.pg1, self.compare_rx_tx_packet_End_AD_IPv4_out
349 # log the localsid counters
350 self.logger.info(self.vapi.cli("show sr localsid"))
352 # prepare IPv6 header for returning packets
353 packet_header2 = self.create_packet_header_IPv4()
355 # generate returning packets (pg1->pg0)
356 pkts2 = self.create_stream(
357 self.pg1, self.pg0, packet_header2, self.pg_packet_sizes, count
360 # send packets and verify received packets
361 self.send_and_verify_pkts(
362 self.pg1, pkts2, self.pg0, self.compare_rx_tx_packet_End_AD_IPv4_in
365 # log the localsid counters
366 self.logger.info(self.vapi.cli("show sr localsid"))
368 # remove SRv6 localSIDs
369 cli_str = "sr localsid del address " + self.sid_list[self.test_sid_index]
370 self.vapi.cli(cli_str)
373 self.teardown_interfaces()
375 def compare_rx_tx_packet_End_AD_IPv4_out(self, tx_pkt, rx_pkt):
376 """Compare input and output packet after passing End.AD with IPv4
378 :param tx_pkt: transmitted packet
379 :param rx_pkt: received packet
382 # get IPv4 header of rx'ed packet
383 rx_ip = rx_pkt.getlayer(IP)
385 tx_ip = tx_pkt.getlayer(IPv6)
386 tx_ip2 = tx_pkt.getlayer(IP)
388 # verify if rx'ed packet has no SRH
389 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
391 # the whole rx_ip pkt should be equal to tx_ip2
392 # except for the ttl field and ip checksum
393 # -> adjust tx'ed ttl to expected ttl
394 tx_ip2.ttl = tx_ip2.ttl - 1
395 # -> set tx'ed ip checksum to None and let scapy recompute
397 # read back the pkt (with str()) to force computing these fields
398 # probably other ways to accomplish this are possible
399 tx_ip2 = IP(scapy.compat.raw(tx_ip2))
401 self.assertEqual(rx_ip, tx_ip2)
403 self.logger.debug("packet verification: SUCCESS")
405 def compare_rx_tx_packet_End_AD_IPv4_in(self, tx_pkt, rx_pkt):
406 """Compare input and output packet after passing End.AD
408 :param tx_pkt: transmitted packet
409 :param rx_pkt: received packet
412 # get first (outer) IPv6 header of rx'ed packet
413 rx_ip = rx_pkt.getlayer(IPv6)
414 # received ip.src should be equal to SR Policy source
415 self.assertEqual(rx_ip.src, self.src_addr)
416 # received ip.dst should be equal to expected sidlist next segment
417 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
419 # rx'ed packet should have SRH
420 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
423 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
424 # rx'ed seglist should be equal to SID-list in reversed order
425 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
426 # segleft should be equal to previous segleft value minus 1
427 self.assertEqual(rx_srh.segleft, len(self.sid_list) - self.test_sid_index - 2)
428 # lastentry should be equal to the SID-list length minus 1
429 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
431 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
432 # except for the ttl field and ip checksum
433 tx_ip = tx_pkt.getlayer(IP)
434 # -> adjust tx'ed ttl to expected ttl
435 tx_ip.ttl = tx_ip.ttl - 1
436 # -> set tx'ed ip checksum to None and let scapy recompute
438 # -> read back the pkt (with str()) to force computing these fields
439 # probably other ways to accomplish this are possible
440 self.assertEqual(rx_srh.payload, IP(scapy.compat.raw(tx_ip)))
442 self.logger.debug("packet verification: SUCCESS")
444 def test_SRv6_End_AD_L2(self):
445 """Test SRv6 End.AD behavior with L2 traffic."""
446 self.src_addr = "a0::"
447 self.sid_list = ["a1::", "a2::a4", "a3::"]
448 self.test_sid_index = 1
450 # send traffic to one destination interface
451 # source and destination interfaces are IPv6 only
452 self.setup_interfaces(ipv6=[True, False])
454 # configure route to next segment
457 self.sid_list[self.test_sid_index + 1],
462 self.pg0.sw_if_index,
463 proto=DpoProto.DPO_PROTO_IP6,
467 route.add_vpp_config()
469 # configure SRv6 localSID behavior
471 "sr localsid address "
472 + self.sid_list[self.test_sid_index]
479 self.vapi.cli(cli_str)
482 self.logger.debug(self.vapi.cli("show sr localsid"))
484 # send one packet per packet size
485 count = len(self.pg_packet_sizes)
487 # prepare L2 in SRv6 headers
488 packet_header1 = self.create_packet_header_IPv6_SRH_L2(
489 srcaddr=self.src_addr,
490 sidlist=self.sid_list[::-1],
491 segleft=len(self.sid_list) - self.test_sid_index - 1,
495 # generate packets (pg0->pg1)
496 pkts1 = self.create_stream(
497 self.pg0, self.pg1, packet_header1, self.pg_packet_sizes, count
500 # send packets and verify received packets
501 self.send_and_verify_pkts(
502 self.pg0, pkts1, self.pg1, self.compare_rx_tx_packet_End_AD_L2_out
505 # log the localsid counters
506 self.logger.info(self.vapi.cli("show sr localsid"))
508 # prepare L2 header for returning packets
509 packet_header2 = self.create_packet_header_L2()
511 # generate returning packets (pg1->pg0)
512 pkts2 = self.create_stream(
513 self.pg1, self.pg0, packet_header2, self.pg_packet_sizes, count
516 # send packets and verify received packets
517 self.send_and_verify_pkts(
518 self.pg1, pkts2, self.pg0, self.compare_rx_tx_packet_End_AD_L2_in
521 # log the localsid counters
522 self.logger.info(self.vapi.cli("show sr localsid"))
524 # remove SRv6 localSIDs
525 cli_str = "sr localsid del address " + self.sid_list[self.test_sid_index]
526 self.vapi.cli(cli_str)
529 self.teardown_interfaces()
531 def compare_rx_tx_packet_End_AD_L2_out(self, tx_pkt, rx_pkt):
532 """Compare input and output packet after passing End.AD with L2
534 :param tx_pkt: transmitted packet
535 :param rx_pkt: received packet
538 # get IPv4 header of rx'ed packet
539 rx_eth = rx_pkt.getlayer(Ether)
541 tx_ip = tx_pkt.getlayer(IPv6)
542 # we can't just get the 2nd Ether layer
543 # get the Raw content and dissect it as Ether
544 tx_eth1 = Ether(scapy.compat.raw(tx_pkt[Raw]))
546 # verify if rx'ed packet has no SRH
547 self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
549 # the whole rx_eth pkt should be equal to tx_eth1
550 self.assertEqual(rx_eth, tx_eth1)
552 self.logger.debug("packet verification: SUCCESS")
554 def compare_rx_tx_packet_End_AD_L2_in(self, tx_pkt, rx_pkt):
555 """Compare input and output packet after passing End.AD
557 :param tx_pkt: transmitted packet
558 :param rx_pkt: received packet
562 # get first (outer) IPv6 header of rx'ed packet
563 rx_ip = rx_pkt.getlayer(IPv6)
564 # received ip.src should be equal to SR Policy source
565 self.assertEqual(rx_ip.src, self.src_addr)
566 # received ip.dst should be equal to expected sidlist next segment
567 self.assertEqual(rx_ip.dst, self.sid_list[self.test_sid_index + 1])
569 # rx'ed packet should have SRH
570 self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
573 rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
574 # rx'ed seglist should be equal to SID-list in reversed order
575 self.assertEqual(rx_srh.addresses, self.sid_list[::-1])
576 # segleft should be equal to previous segleft value minus 1
577 self.assertEqual(rx_srh.segleft, len(self.sid_list) - self.test_sid_index - 2)
578 # lastentry should be equal to the SID-list length minus 1
579 self.assertEqual(rx_srh.lastentry, len(self.sid_list) - 1)
581 # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
582 tx_ether = tx_pkt.getlayer(Ether)
583 self.assertEqual(Ether(scapy.compat.raw(rx_srh.payload)), tx_ether)
585 self.logger.debug("packet verification: SUCCESS")
587 def create_stream(self, src_if, dst_if, packet_header, packet_sizes, count):
588 """Create SRv6 input packet stream for defined interface.
590 :param VppInterface src_if: Interface to create packet stream for
591 :param VppInterface dst_if: destination interface of packet stream
592 :param packet_header: Layer3 scapy packet headers,
593 L2 is added when not provided,
594 Raw(payload) with packet_info is added
595 :param list packet_sizes: packet stream pckt sizes,sequentially applied
596 to packets in stream have
597 :param int count: number of packets in packet stream
598 :return: list of packets
600 self.logger.info("Creating packets")
602 for i in range(0, count - 1):
603 payload_info = self.create_packet_info(src_if, dst_if)
604 self.logger.debug("Creating packet with index %d" % (payload_info.index))
605 payload = self.info_to_payload(payload_info)
606 # add L2 header if not yet provided in packet_header
607 if packet_header.getlayer(0).name == "Ethernet":
608 p = packet_header / Raw(payload)
611 Ether(dst=src_if.local_mac, src=src_if.remote_mac)
615 size = packet_sizes[i % len(packet_sizes)]
616 self.logger.debug("Packet size %d" % (size))
617 self.extend_packet(p, size)
618 # we need to store the packet with the automatic fields computed
619 # read back the dumped packet (with str())
620 # to force computing these fields
621 # probably other ways are possible
622 p = Ether(scapy.compat.raw(p))
623 payload_info.data = p.copy()
624 self.logger.debug(ppp("Created packet:", p))
626 self.logger.info("Done creating packets")
629 def send_and_verify_pkts(self, input, pkts, output, compare_func):
630 """Send packets and verify received packets using compare_func
632 :param input: ingress interface of DUT
633 :param pkts: list of packets to transmit
634 :param output: egress interface of DUT
635 :param compare_func: function to compare in and out packets
637 # add traffic stream to input interface
638 input.add_stream(pkts)
640 # enable capture on all interfaces
641 self.pg_enable_capture(self.pg_interfaces)
644 self.logger.info("Starting traffic")
648 self.logger.info("Getting packet capture")
649 capture = output.get_capture()
651 # assert nothing was captured on input interface
652 # input.assert_nothing_captured()
654 # verify captured packets
655 self.verify_captured_pkts(output, capture, compare_func)
657 def create_packet_header_IPv6(self):
658 """Create packet header: IPv6 header, UDP header
660 :param dst: IPv6 destination address
662 IPv6 source address is 1234::1
663 IPv6 destination address is 4321::1
664 UDP source port and destination port are 1234
667 p = IPv6(src="1234::1", dst="4321::1") / UDP(sport=1234, dport=1234)
670 def create_packet_header_IPv6_SRH_IPv6(self, srcaddr, sidlist, segleft):
671 """Create packet header: IPv6 encapsulated in SRv6:
672 IPv6 header with SRH, IPv6 header, UDP header
674 :param int srcaddr: outer source address
675 :param list sidlist: segment list of outer IPv6 SRH
676 :param int segleft: segments-left field of outer IPv6 SRH
678 Outer IPv6 source address is set to srcaddr
679 Outer IPv6 destination address is set to sidlist[segleft]
680 Inner IPv6 source addresses is 1234::1
681 Inner IPv6 destination address is 4321::1
682 UDP source port and destination port are 1234
686 IPv6(src=srcaddr, dst=sidlist[segleft])
687 / IPv6ExtHdrSegmentRouting(addresses=sidlist, segleft=segleft, nh=41)
688 / IPv6(src="1234::1", dst="4321::1")
689 / UDP(sport=1234, dport=1234)
693 def create_packet_header_IPv4(self):
694 """Create packet header: IPv4 header, UDP header
696 :param dst: IPv4 destination address
698 IPv4 source address is 123.1.1.1
699 IPv4 destination address is 124.1.1.1
700 UDP source port and destination port are 1234
703 p = IP(src="123.1.1.1", dst="124.1.1.1") / UDP(sport=1234, dport=1234)
706 def create_packet_header_IPv6_SRH_IPv4(self, srcaddr, sidlist, segleft):
707 """Create packet header: IPv4 encapsulated in SRv6:
708 IPv6 header with SRH, IPv4 header, UDP header
710 :param int srcaddr: outer source address
711 :param list sidlist: segment list of outer IPv6 SRH
712 :param int segleft: segments-left field of outer IPv6 SRH
714 Outer IPv6 source address is set to srcaddr
715 Outer IPv6 destination address is set to sidlist[segleft]
716 Inner IPv4 source address is 123.1.1.1
717 Inner IPv4 destination address is 124.1.1.1
718 UDP source port and destination port are 1234
722 IPv6(src=srcaddr, dst=sidlist[segleft])
723 / IPv6ExtHdrSegmentRouting(addresses=sidlist, segleft=segleft, nh=4)
724 / IP(src="123.1.1.1", dst="124.1.1.1")
725 / UDP(sport=1234, dport=1234)
729 def create_packet_header_L2(self, vlan=0):
730 """Create packet header: L2 header
732 :param vlan: if vlan!=0 then add 802.1q header
734 # Note: the dst addr ('00:55:44:33:22:11') is used in
735 # the compare function compare_rx_tx_packet_T_Encaps_L2
736 # to detect presence of L2 in SRH payload
737 p = Ether(src="00:11:22:33:44:55", dst="00:55:44:33:22:11")
741 p /= Dot1Q(vlan=vlan, type=etype)
746 def create_packet_header_IPv6_SRH_L2(self, srcaddr, sidlist, segleft, vlan=0):
747 """Create packet header: L2 encapsulated in SRv6:
748 IPv6 header with SRH, L2
750 :param int srcaddr: IPv6 source address
751 :param list sidlist: segment list of outer IPv6 SRH
752 :param int segleft: segments-left field of outer IPv6 SRH
753 :param vlan: L2 vlan; if vlan!=0 then add 802.1q header
755 IPv6 source address is set to srcaddr
756 IPv6 destination address is set to sidlist[segleft]
758 eth = Ether(src="00:11:22:33:44:55", dst="00:55:44:33:22:11")
762 eth /= Dot1Q(vlan=vlan, type=etype)
767 IPv6(src=srcaddr, dst=sidlist[segleft])
768 / IPv6ExtHdrSegmentRouting(addresses=sidlist, segleft=segleft, nh=143)
773 def get_payload_info(self, packet):
774 """Extract the payload_info from the packet"""
775 # in most cases, payload_info is in packet[Raw]
776 # but packet[Raw] gives the complete payload
777 # (incl L2 header) for the T.Encaps L2 case
779 payload_info = self.payload_to_info(packet[Raw])
782 # remote L2 header from packet[Raw]:
783 # take packet[Raw], convert it to an Ether layer
784 # and then extract Raw from it
785 payload_info = self.payload_to_info(
786 Ether(scapy.compat.raw(packet[Raw]))[Raw]
791 def verify_captured_pkts(self, dst_if, capture, compare_func):
793 Verify captured packet stream for specified interface.
794 Compare ingress with egress packets using the specified compare fn
796 :param dst_if: egress interface of DUT
797 :param capture: captured packets
798 :param compare_func: function to compare in and out packet
801 "Verifying capture on interface %s using function %s"
802 % (dst_if.name, compare_func.__name__)
806 for i in self.pg_interfaces:
807 last_info[i.sw_if_index] = None
808 dst_sw_if_index = dst_if.sw_if_index
810 for packet in capture:
812 # extract payload_info from packet's payload
813 payload_info = self.get_payload_info(packet)
814 packet_index = payload_info.index
816 self.logger.debug("Verifying packet with index %d" % (packet_index))
817 # packet should have arrived on the expected interface
818 self.assertEqual(payload_info.dst, dst_sw_if_index)
820 "Got packet on interface %s: src=%u (idx=%u)"
821 % (dst_if.name, payload_info.src, packet_index)
824 # search for payload_info with same src and dst if_index
825 # this will give us the transmitted packet
826 next_info = self.get_next_packet_info_for_interface2(
827 payload_info.src, dst_sw_if_index, last_info[payload_info.src]
829 last_info[payload_info.src] = next_info
830 # next_info should not be None
831 self.assertTrue(next_info is not None)
832 # index of tx and rx packets should be equal
833 self.assertEqual(packet_index, next_info.index)
834 # data field of next_info contains the tx packet
835 txed_packet = next_info.data
838 ppp("Transmitted packet:", txed_packet)
839 ) # ppp=Pretty Print Packet
841 self.logger.debug(ppp("Received packet:", packet))
843 # compare rcvd packet with expected packet using compare_func
844 compare_func(txed_packet, packet)
847 self.logger.error(ppp("Unexpected or invalid packet:", packet))
850 # have all expected packets arrived?
851 for i in self.pg_interfaces:
852 remaining_packet = self.get_next_packet_info_for_interface2(
853 i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index]
856 remaining_packet is None,
857 "Interface %s: Packet expected from interface %s "
858 "didn't arrive" % (dst_if.name, i.name),
862 if __name__ == "__main__":
863 unittest.main(testRunner=VppTestRunner)