--- /dev/null
+#!/usr/bin/env python
+
+import unittest
+import binascii
+from socket import AF_INET6
+
+from framework import VppTestCase, VppTestRunner
+from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto, VppIpTable
+from vpp_srv6 import SRv6LocalSIDBehaviors, VppSRv6LocalSID, VppSRv6Policy, \
+ SRv6PolicyType, VppSRv6Steering, SRv6PolicySteeringTypes
+
+from scapy.packet import Raw
+from scapy.layers.l2 import Ether, Dot1Q
+from scapy.layers.inet6 import IPv6, UDP, IPv6ExtHdrSegmentRouting
+from scapy.layers.inet import IP, UDP
+
+from scapy.utils import inet_pton, inet_ntop
+
+from util import ppp
+
+
+class TestSRv6(VppTestCase):
+ """ SRv6 Static Proxy plugin Test Case """
+
+ @classmethod
+ def setUpClass(self):
+ super(TestSRv6, self).setUpClass()
+
+ def setUp(self):
+ """ Perform test setup before each test case.
+ """
+ super(TestSRv6, self).setUp()
+
+ # packet sizes, inclusive L2 overhead
+ self.pg_packet_sizes = [64, 512, 1518, 9018]
+
+ # reset packet_infos
+ self.reset_packet_infos()
+
+ def tearDown(self):
+ """ Clean up test setup after each test case.
+ """
+ self.teardown_interfaces()
+
+ super(TestSRv6, self).tearDown()
+
+ def configure_interface(self,
+ interface,
+ ipv6=False, ipv4=False,
+ ipv6_table_id=0, ipv4_table_id=0):
+ """ Configure interface.
+ :param ipv6: configure IPv6 on interface
+ :param ipv4: configure IPv4 on interface
+ :param ipv6_table_id: FIB table_id for IPv6
+ :param ipv4_table_id: FIB table_id for IPv4
+ """
+ self.logger.debug("Configuring interface %s" % (interface.name))
+ if ipv6:
+ self.logger.debug("Configuring IPv6")
+ interface.set_table_ip6(ipv6_table_id)
+ interface.config_ip6()
+ interface.resolve_ndp(timeout=5)
+ if ipv4:
+ self.logger.debug("Configuring IPv4")
+ interface.set_table_ip4(ipv4_table_id)
+ interface.config_ip4()
+ interface.resolve_arp()
+ interface.admin_up()
+
+ def setup_interfaces(self, ipv6=[], ipv4=[],
+ ipv6_table_id=[], ipv4_table_id=[]):
+ """ Create and configure interfaces.
+
+ :param ipv6: list of interface IPv6 capabilities
+ :param ipv4: list of interface IPv4 capabilities
+ :param ipv6_table_id: list of intf IPv6 FIB table_ids
+ :param ipv4_table_id: list of intf IPv4 FIB table_ids
+ :returns: List of created interfaces.
+ """
+ # how many interfaces?
+ if len(ipv6):
+ count = len(ipv6)
+ else:
+ count = len(ipv4)
+ self.logger.debug("Creating and configuring %d interfaces" % (count))
+
+ # fill up ipv6 and ipv4 lists if needed
+ # not enabled (False) is the default
+ if len(ipv6) < count:
+ ipv6 += (count - len(ipv6)) * [False]
+ if len(ipv4) < count:
+ ipv4 += (count - len(ipv4)) * [False]
+
+ # fill up table_id lists if needed
+ # table_id 0 (global) is the default
+ if len(ipv6_table_id) < count:
+ ipv6_table_id += (count - len(ipv6_table_id)) * [0]
+ if len(ipv4_table_id) < count:
+ ipv4_table_id += (count - len(ipv4_table_id)) * [0]
+
+ # create 'count' pg interfaces
+ self.create_pg_interfaces(range(count))
+
+ # setup all interfaces
+ for i in range(count):
+ intf = self.pg_interfaces[i]
+ self.configure_interface(intf,
+ ipv6[i], ipv4[i],
+ ipv6_table_id[i], ipv4_table_id[i])
+
+ if any(ipv6):
+ self.logger.debug(self.vapi.cli("show ip6 neighbors"))
+ if any(ipv4):
+ self.logger.debug(self.vapi.cli("show ip arp"))
+ self.logger.debug(self.vapi.cli("show interface"))
+ self.logger.debug(self.vapi.cli("show hardware"))
+
+ return self.pg_interfaces
+
+ def teardown_interfaces(self):
+ """ Unconfigure and bring down interface.
+ """
+ self.logger.debug("Tearing down interfaces")
+ # tear down all interfaces
+ # AFAIK they cannot be deleted
+ for i in self.pg_interfaces:
+ self.logger.debug("Tear down interface %s" % (i.name))
+ i.admin_down()
+ i.unconfig()
+ i.set_table_ip4(0)
+ i.set_table_ip6(0)
+
+ def test_SRv6_End_AS_IPv6_noSRH(self):
+ """ Test SRv6 End.AS behavior with IPv6 traffic and no SRH rewrite.
+ """
+ self.run_SRv6_End_AS_IPv6(
+ sid_list=['a1::', 'a2::a6', 'a3::'],
+ test_sid_index=1,
+ rewrite_src_addr='a2::')
+
+ def test_SRv6_End_AS_IPv6_SRH(self):
+ """ Test SRv6 End.AS behavior with IPv6 traffic and SRH rewrite.
+ """
+ self.run_SRv6_End_AS_IPv6(
+ sid_list=['a1::a6', 'a2::', 'a3::'],
+ test_sid_index=0,
+ rewrite_src_addr='a1::')
+
+ def test_SRv6_End_AS_IPv4_noSRH(self):
+ """ Test SRv6 End.AS behavior with IPv4 traffic and no SRH rewrite.
+ """
+ self.run_SRv6_End_AS_IPv4(
+ sid_list=['a1::', 'a2::a6', 'a3::'],
+ test_sid_index=1,
+ rewrite_src_addr='a2::')
+
+ def test_SRv6_End_AS_IPv4_SRH(self):
+ """ Test SRv6 End.AS behavior with IPv4 traffic and SRH rewrite.
+ """
+ self.run_SRv6_End_AS_IPv4(
+ sid_list=['a1::a6', 'a2::', 'a3::'],
+ test_sid_index=0,
+ rewrite_src_addr='a1::')
+
+ def run_SRv6_End_AS_IPv6(self, sid_list, test_sid_index, rewrite_src_addr):
+ """ Run SRv6 End.AS test with IPv6 traffic.
+ """
+ self.rewrite_src_addr = rewrite_src_addr
+ self.rewrite_sid_list = sid_list[test_sid_index + 1::]
+
+ # send traffic to one destination interface
+ # source and destination interfaces are IPv6 only
+ self.setup_interfaces(ipv6=[True, True])
+
+ # configure route to next segment
+ route = VppIpRoute(self, sid_list[test_sid_index + 1], 128,
+ [VppRoutePath(self.pg0.remote_ip6,
+ self.pg0.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+
+ # configure SRv6 localSID behavior
+ cli_str = "sr localsid address " + sid_list[test_sid_index] \
+ + " behavior end.as" \
+ + " nh " + self.pg1.remote_ip6 \
+ + " oif " + self.pg1.name \
+ + " iif " + self.pg1.name \
+ + " src " + self.rewrite_src_addr
+ for s in self.rewrite_sid_list:
+ cli_str += " next " + s
+ self.vapi.cli(cli_str)
+
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # send one packet per packet size
+ count = len(self.pg_packet_sizes)
+
+ # prepare IPv6 in SRv6 headers
+ packet_header1 = self.create_packet_header_IPv6_SRH_IPv6(
+ sidlist=sid_list[::-1],
+ segleft=len(sid_list) - test_sid_index - 1)
+
+ # generate packets (pg0->pg1)
+ pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
+ self.pg_packet_sizes, count)
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
+ self.compare_rx_tx_packet_End_AS_IPv6_out)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # prepare IPv6 header for returning packets
+ packet_header2 = self.create_packet_header_IPv6()
+
+ # generate returning packets (pg1->pg0)
+ pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
+ self.pg_packet_sizes, count)
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
+ self.compare_rx_tx_packet_End_AS_IPv6_in)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ self.vapi.cli("sr localsid del address " + sid_list[test_sid_index])
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def run_SRv6_End_AS_IPv4(self, sid_list, test_sid_index, rewrite_src_addr):
+ """ Run SRv6 End.AS test with IPv4 traffic.
+ """
+ self.rewrite_src_addr = rewrite_src_addr
+ self.rewrite_sid_list = sid_list[test_sid_index + 1::]
+
+ # send traffic to one destination interface
+ # source and destination interfaces are IPv6 only
+ self.setup_interfaces(ipv6=[True, False], ipv4=[True, True])
+
+ # configure route to next segment
+ route = VppIpRoute(self, sid_list[test_sid_index + 1], 128,
+ [VppRoutePath(self.pg0.remote_ip6,
+ self.pg0.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+
+ # configure SRv6 localSID behavior
+ cli_str = "sr localsid address " + sid_list[test_sid_index] \
+ + " behavior end.as" \
+ + " nh " + self.pg1.remote_ip4 \
+ + " oif " + self.pg1.name \
+ + " iif " + self.pg1.name \
+ + " src " + self.rewrite_src_addr
+ for s in self.rewrite_sid_list:
+ cli_str += " next " + s
+ self.vapi.cli(cli_str)
+
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # send one packet per packet size
+ count = len(self.pg_packet_sizes)
+
+ # prepare IPv4 in SRv6 headers
+ packet_header1 = self.create_packet_header_IPv6_SRH_IPv4(
+ sidlist=sid_list[::-1],
+ segleft=len(sid_list) - test_sid_index - 1)
+
+ # generate packets (pg0->pg1)
+ pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
+ self.pg_packet_sizes, count)
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
+ self.compare_rx_tx_packet_End_AS_IPv4_out)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # prepare IPv6 header for returning packets
+ packet_header2 = self.create_packet_header_IPv4()
+
+ # generate returning packets (pg1->pg0)
+ pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
+ self.pg_packet_sizes, count)
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
+ self.compare_rx_tx_packet_End_AS_IPv4_in)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ self.vapi.cli("sr localsid del address " + sid_list[test_sid_index])
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def compare_rx_tx_packet_End_AS_IPv6_in(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing End.AS
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+
+ # get first (outer) IPv6 header of rx'ed packet
+ rx_ip = rx_pkt.getlayer(IPv6)
+ rx_srh = None
+
+ tx_ip = tx_pkt.getlayer(IPv6)
+
+ # expected segment-list (SRH order)
+ tx_seglist = self.rewrite_sid_list[::-1]
+
+ # received ip.src should be equal to SR Policy source
+ self.assertEqual(rx_ip.src, self.rewrite_src_addr)
+ # received ip.dst should be equal to expected sidlist[lastentry]
+ self.assertEqual(rx_ip.dst, tx_seglist[-1])
+
+ if len(tx_seglist) > 1:
+ # rx'ed packet should have SRH
+ self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ # get SRH
+ rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+ # rx'ed seglist should be equal to expected seglist
+ self.assertEqual(rx_srh.addresses, tx_seglist)
+ # segleft should be equal to size expected seglist-1
+ self.assertEqual(rx_srh.segleft, len(tx_seglist)-1)
+ # segleft should be equal to lastentry
+ self.assertEqual(rx_srh.segleft, rx_srh.lastentry)
+ # get payload
+ payload = rx_srh.payload
+ else:
+ # rx'ed packet should NOT have SRH
+ self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ # get payload
+ payload = rx_ip.payload
+
+ # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
+ # except for the hop-limit field
+ # -> update tx'ed hlim to the expected hlim
+ tx_ip.hlim = tx_ip.hlim - 1
+
+ self.assertEqual(payload, tx_ip)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def compare_rx_tx_packet_End_AS_IPv4_in(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing End.AS
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+
+ # get first (outer) IPv6 header of rx'ed packet
+ rx_ip = rx_pkt.getlayer(IPv6)
+ rx_srh = None
+
+ tx_ip = tx_pkt.getlayer(IP)
+
+ # expected segment-list (SRH order)
+ tx_seglist = self.rewrite_sid_list[::-1]
+
+ # received ip.src should be equal to SR Policy source
+ self.assertEqual(rx_ip.src, self.rewrite_src_addr)
+ # received ip.dst should be equal to expected sidlist[lastentry]
+ self.assertEqual(rx_ip.dst, tx_seglist[-1])
+
+ if len(tx_seglist) > 1:
+ # rx'ed packet should have SRH and IPv4 header
+ self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ self.assertTrue(rx_ip.payload.haslayer(IP))
+ # get SRH
+ rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+ # rx'ed seglist should be equal to seglist
+ self.assertEqual(rx_srh.addresses, tx_seglist)
+ # segleft should be equal to size seglist-1
+ self.assertEqual(rx_srh.segleft, len(tx_seglist)-1)
+ # segleft should be equal to lastentry
+ self.assertEqual(rx_srh.segleft, rx_srh.lastentry)
+ payload = rx_srh.payload
+ else:
+ # rx'ed packet should NOT have SRH
+ self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ # get payload
+ payload = rx_ip.payload
+
+ # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
+ # except for the ttl field and ip checksum
+ # -> adjust tx'ed ttl to expected ttl
+ tx_ip.ttl = tx_ip.ttl - 1
+ # -> set tx'ed ip checksum to None and let scapy recompute
+ tx_ip.chksum = None
+ # read back the pkt (with str()) to force computing these fields
+ # probably other ways to accomplish this are possible
+ tx_ip = IP(str(tx_ip))
+
+ self.assertEqual(payload, tx_ip)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def compare_rx_tx_packet_End_AS_IPv6_out(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing End.AS with IPv6
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+
+ # get first (outer) IPv6 header of rx'ed packet
+ rx_ip = rx_pkt.getlayer(IPv6)
+
+ tx_ip = tx_pkt.getlayer(IPv6)
+ tx_ip2 = tx_pkt.getlayer(IPv6, 2)
+
+ # verify if rx'ed packet has no SRH
+ self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+
+ # the whole rx_ip pkt should be equal to tx_ip2
+ # except for the hlim field
+ # -> adjust tx'ed hlim to expected hlim
+ tx_ip2.hlim = tx_ip2.hlim - 1
+
+ self.assertEqual(rx_ip, tx_ip2)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def compare_rx_tx_packet_End_AS_IPv4_out(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing End.AS with IPv4
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+
+ # get IPv4 header of rx'ed packet
+ rx_ip = rx_pkt.getlayer(IP)
+
+ tx_ip = tx_pkt.getlayer(IPv6)
+ tx_ip2 = tx_pkt.getlayer(IP)
+
+ # verify if rx'ed packet has no SRH
+ self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+
+ # the whole rx_ip pkt should be equal to tx_ip2
+ # except for the ttl field and ip checksum
+ # -> adjust tx'ed ttl to expected ttl
+ tx_ip2.ttl = tx_ip2.ttl - 1
+ # -> set tx'ed ip checksum to None and let scapy recompute
+ tx_ip2.chksum = None
+ # read back the pkt (with str()) to force computing these fields
+ # probably other ways to accomplish this are possible
+ tx_ip2 = IP(str(tx_ip2))
+
+ self.assertEqual(rx_ip, tx_ip2)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def create_stream(self, src_if, dst_if, packet_header, packet_sizes,
+ count):
+ """Create SRv6 input packet stream for defined interface.
+
+ :param VppInterface src_if: Interface to create packet stream for
+ :param VppInterface dst_if: destination interface of packet stream
+ :param packet_header: Layer3 scapy packet headers,
+ L2 is added when not provided,
+ Raw(payload) with packet_info is added
+ :param list packet_sizes: packet stream pckt sizes,sequentially applied
+ to packets in stream have
+ :param int count: number of packets in packet stream
+ :return: list of packets
+ """
+ self.logger.info("Creating packets")
+ pkts = []
+ for i in range(0, count-1):
+ payload_info = self.create_packet_info(src_if, dst_if)
+ self.logger.debug(
+ "Creating packet with index %d" % (payload_info.index))
+ payload = self.info_to_payload(payload_info)
+ # add L2 header if not yet provided in packet_header
+ if packet_header.getlayer(0).name == 'Ethernet':
+ p = (packet_header /
+ Raw(payload))
+ else:
+ p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
+ packet_header /
+ Raw(payload))
+ size = packet_sizes[i % len(packet_sizes)]
+ self.logger.debug("Packet size %d" % (size))
+ self.extend_packet(p, size)
+ # we need to store the packet with the automatic fields computed
+ # read back the dumped packet (with str())
+ # to force computing these fields
+ # probably other ways are possible
+ p = Ether(str(p))
+ payload_info.data = p.copy()
+ self.logger.debug(ppp("Created packet:", p))
+ pkts.append(p)
+ self.logger.info("Done creating packets")
+ return pkts
+
+ def send_and_verify_pkts(self, input, pkts, output, compare_func):
+ """Send packets and verify received packets using compare_func
+
+ :param input: ingress interface of DUT
+ :param pkts: list of packets to transmit
+ :param output: egress interface of DUT
+ :param compare_func: function to compare in and out packets
+ """
+ # add traffic stream to input interface
+ input.add_stream(pkts)
+
+ # enable capture on all interfaces
+ self.pg_enable_capture(self.pg_interfaces)
+
+ # start traffic
+ self.logger.info("Starting traffic")
+ self.pg_start()
+
+ # get output capture
+ self.logger.info("Getting packet capture")
+ capture = output.get_capture()
+
+ # assert nothing was captured on input interface
+ # input.assert_nothing_captured()
+
+ # verify captured packets
+ self.verify_captured_pkts(output, capture, compare_func)
+
+ def create_packet_header_IPv6(self):
+ """Create packet header: IPv6 header, UDP header
+
+ :param dst: IPv6 destination address
+
+ IPv6 source address is 1234::1
+ IPv6 destination address is 4321::1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IPv6(src='1234::1', dst='4321::1') /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv6_SRH_IPv6(self, sidlist, segleft):
+ """Create packet header: IPv6 encapsulated in SRv6:
+ IPv6 header with SRH, IPv6 header, UDP header
+
+ :param list sidlist: segment list of outer IPv6 SRH
+ :param int segleft: segments-left field of outer IPv6 SRH
+
+ Outer IPv6 source address is set to 5678::1
+ Outer IPv6 destination address is set to sidlist[segleft]
+ IPv6 source addresses is 1234::1
+ IPv6 destination address is 4321::1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IPv6(src='5678::1', dst=sidlist[segleft]) /
+ IPv6ExtHdrSegmentRouting(addresses=sidlist,
+ segleft=segleft, nh=41) /
+ IPv6(src='1234::1', dst='4321::1') /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv4(self):
+ """Create packet header: IPv4 header, UDP header
+
+ :param dst: IPv4 destination address
+
+ IPv4 source address is 123.1.1.1
+ IPv4 destination address is 124.1.1.1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IP(src='123.1.1.1', dst='124.1.1.1') /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv6_SRH_IPv4(self, sidlist, segleft):
+ """Create packet header: IPv4 encapsulated in SRv6:
+ IPv6 header with SRH, IPv4 header, UDP header
+
+ :param ipv4address dst: inner IPv4 destination address
+ :param list sidlist: segment list of outer IPv6 SRH
+ :param int segleft: segments-left field of outer IPv6 SRH
+
+ Outer IPv6 destination address is set to sidlist[segleft]
+ IPv6 source address is 1234::1
+ IPv4 source address is 123.1.1.1
+ IPv4 destination address is 124.1.1.1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IPv6(src='1234::1', dst=sidlist[segleft]) /
+ IPv6ExtHdrSegmentRouting(addresses=sidlist,
+ segleft=segleft, nh=4) /
+ IP(src='123.1.1.1', dst='124.1.1.1') /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def get_payload_info(self, packet):
+ """ Extract the payload_info from the packet
+ """
+ # in most cases, payload_info is in packet[Raw]
+ # but packet[Raw] gives the complete payload
+ # (incl L2 header) for the T.Encaps L2 case
+ try:
+ payload_info = self.payload_to_info(str(packet[Raw]))
+
+ except:
+ # remote L2 header from packet[Raw]:
+ # take packet[Raw], convert it to an Ether layer
+ # and then extract Raw from it
+ payload_info = self.payload_to_info(
+ str(Ether(str(packet[Raw]))[Raw]))
+
+ return payload_info
+
+ def verify_captured_pkts(self, dst_if, capture, compare_func):
+ """
+ Verify captured packet stream for specified interface.
+ Compare ingress with egress packets using the specified compare fn
+
+ :param dst_if: egress interface of DUT
+ :param capture: captured packets
+ :param compare_func: function to compare in and out packet
+ """
+ self.logger.info("Verifying capture on interface %s using function %s"
+ % (dst_if.name, compare_func.func_name))
+
+ last_info = dict()
+ for i in self.pg_interfaces:
+ last_info[i.sw_if_index] = None
+ dst_sw_if_index = dst_if.sw_if_index
+
+ for packet in capture:
+ try:
+ # extract payload_info from packet's payload
+ payload_info = self.get_payload_info(packet)
+ packet_index = payload_info.index
+
+ self.logger.debug("Verifying packet with index %d"
+ % (packet_index))
+ # packet should have arrived on the expected interface
+ self.assertEqual(payload_info.dst, dst_sw_if_index)
+ self.logger.debug(
+ "Got packet on interface %s: src=%u (idx=%u)" %
+ (dst_if.name, payload_info.src, packet_index))
+
+ # search for payload_info with same src and dst if_index
+ # this will give us the transmitted packet
+ next_info = self.get_next_packet_info_for_interface2(
+ payload_info.src, dst_sw_if_index,
+ last_info[payload_info.src])
+ last_info[payload_info.src] = next_info
+ # next_info should not be None
+ self.assertTrue(next_info is not None)
+ # index of tx and rx packets should be equal
+ self.assertEqual(packet_index, next_info.index)
+ # data field of next_info contains the tx packet
+ txed_packet = next_info.data
+
+ self.logger.debug(ppp("Transmitted packet:",
+ txed_packet)) # ppp=Pretty Print Packet
+
+ self.logger.debug(ppp("Received packet:", packet))
+
+ # compare rcvd packet with expected packet using compare_func
+ compare_func(txed_packet, packet)
+
+ except:
+ print packet.command()
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # have all expected packets arrived?
+ for i in self.pg_interfaces:
+ remaining_packet = self.get_next_packet_info_for_interface2(
+ i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
+ self.assertTrue(remaining_packet is None,
+ "Interface %s: Packet expected from interface %s "
+ "didn't arrive" % (dst_if.name, i.name))
+
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / commitdiff