--- /dev/null
+#!/usr/bin/env python
+
+import unittest
+from socket import AF_INET6
+
+from framework import VppTestCase, VppTestRunner
+from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto
+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 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()
+
+ def test_SRv6_T_Encaps(self):
+ """ Test SRv6 Transit.Encaps behavior for IPv6.
+ """
+ # send traffic to one destination interface
+ # source and destination are IPv6 only
+ self.setup_interfaces(ipv6=[True, True])
+
+ # configure FIB entries
+ route = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+
+ # configure encaps IPv6 source address
+ # needs to be done before SR Policy config
+ # TODO: API?
+ self.vapi.cli("set sr encaps source addr a3::")
+
+ bsid = 'a3::9999:1'
+ # configure SRv6 Policy
+ # Note: segment list order: first -> last
+ sr_policy = VppSRv6Policy(
+ self, bsid=bsid,
+ is_encap=1,
+ sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT,
+ weight=1, fib_table=0,
+ segments=['a4::', 'a5::', 'a6::c7'],
+ source='a3::')
+ sr_policy.add_vpp_config()
+ self.sr_policy = sr_policy
+
+ # log the sr policies
+ self.logger.info(self.vapi.cli("show sr policies"))
+
+ # steer IPv6 traffic to a7::/64 into SRv6 Policy
+ # use the bsid of the above self.sr_policy
+ pol_steering = VppSRv6Steering(
+ self,
+ bsid=self.sr_policy.bsid,
+ prefix="a7::", mask_width=64,
+ traffic_type=SRv6PolicySteeringTypes.SR_STEER_IPV6,
+ sr_policy_index=0, table_id=0,
+ sw_if_index=0)
+ pol_steering.add_vpp_config()
+
+ # log the sr steering policies
+ self.logger.info(self.vapi.cli("show sr steering policies"))
+
+ # create packets
+ count = len(self.pg_packet_sizes)
+ dst_inner = 'a7::1234'
+ pkts = []
+
+ # create IPv6 packets without SRH
+ packet_header = self.create_packet_header_IPv6(dst_inner)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # create IPv6 packets with SRH
+ # packets with segments-left 1, active segment a7::
+ packet_header = self.create_packet_header_IPv6_SRH(
+ sidlist=['a8::', 'a7::', 'a6::'],
+ segleft=1)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # create IPv6 packets with SRH and IPv6
+ # packets with segments-left 1, active segment a7::
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a8::', 'a7::', 'a6::'],
+ segleft=1)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_T_Encaps)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SR steering
+ pol_steering.remove_vpp_config()
+ self.logger.info(self.vapi.cli("show sr steering policies"))
+
+ # remove SR Policies
+ self.sr_policy.remove_vpp_config()
+ self.logger.info(self.vapi.cli("show sr policies"))
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_T_Insert(self):
+ """ Test SRv6 Transit.Insert behavior (IPv6 only).
+ """
+ # send traffic to one destination interface
+ # source and destination are IPv6 only
+ self.setup_interfaces(ipv6=[True, True])
+
+ # configure FIB entries
+ route = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+
+ # configure encaps IPv6 source address
+ # needs to be done before SR Policy config
+ # TODO: API?
+ self.vapi.cli("set sr encaps source addr a3::")
+
+ bsid = 'a3::9999:1'
+ # configure SRv6 Policy
+ # Note: segment list order: first -> last
+ sr_policy = VppSRv6Policy(
+ self, bsid=bsid,
+ is_encap=0,
+ sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT,
+ weight=1, fib_table=0,
+ segments=['a4::', 'a5::', 'a6::c7'],
+ source='a3::')
+ sr_policy.add_vpp_config()
+ self.sr_policy = sr_policy
+
+ # log the sr policies
+ self.logger.info(self.vapi.cli("show sr policies"))
+
+ # steer IPv6 traffic to a7::/64 into SRv6 Policy
+ # use the bsid of the above self.sr_policy
+ pol_steering = VppSRv6Steering(
+ self,
+ bsid=self.sr_policy.bsid,
+ prefix="a7::", mask_width=64,
+ traffic_type=SRv6PolicySteeringTypes.SR_STEER_IPV6,
+ sr_policy_index=0, table_id=0,
+ sw_if_index=0)
+ pol_steering.add_vpp_config()
+
+ # log the sr steering policies
+ self.logger.info(self.vapi.cli("show sr steering policies"))
+
+ # create packets
+ count = len(self.pg_packet_sizes)
+ dst_inner = 'a7::1234'
+ pkts = []
+
+ # create IPv6 packets without SRH
+ packet_header = self.create_packet_header_IPv6(dst_inner)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # create IPv6 packets with SRH
+ # packets with segments-left 1, active segment a7::
+ packet_header = self.create_packet_header_IPv6_SRH(
+ sidlist=['a8::', 'a7::', 'a6::'],
+ segleft=1)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_T_Insert)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SR steering
+ pol_steering.remove_vpp_config()
+ self.logger.info(self.vapi.cli("show sr steering policies"))
+
+ # remove SR Policies
+ self.sr_policy.remove_vpp_config()
+ self.logger.info(self.vapi.cli("show sr policies"))
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_T_Encaps_IPv4(self):
+ """ Test SRv6 Transit.Encaps behavior for IPv4.
+ """
+ # send traffic to one destination interface
+ # source interface is IPv4 only
+ # destination interface is IPv6 only
+ self.setup_interfaces(ipv6=[False, True], ipv4=[True, False])
+
+ # configure FIB entries
+ route = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+
+ # configure encaps IPv6 source address
+ # needs to be done before SR Policy config
+ # TODO: API?
+ self.vapi.cli("set sr encaps source addr a3::")
+
+ bsid = 'a3::9999:1'
+ # configure SRv6 Policy
+ # Note: segment list order: first -> last
+ sr_policy = VppSRv6Policy(
+ self, bsid=bsid,
+ is_encap=1,
+ sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT,
+ weight=1, fib_table=0,
+ segments=['a4::', 'a5::', 'a6::c7'],
+ source='a3::')
+ sr_policy.add_vpp_config()
+ self.sr_policy = sr_policy
+
+ # log the sr policies
+ self.logger.info(self.vapi.cli("show sr policies"))
+
+ # steer IPv4 traffic to 7.1.1.0/24 into SRv6 Policy
+ # use the bsid of the above self.sr_policy
+ pol_steering = VppSRv6Steering(
+ self,
+ bsid=self.sr_policy.bsid,
+ prefix="7.1.1.0", mask_width=24,
+ traffic_type=SRv6PolicySteeringTypes.SR_STEER_IPV4,
+ sr_policy_index=0, table_id=0,
+ sw_if_index=0)
+ pol_steering.add_vpp_config()
+
+ # log the sr steering policies
+ self.logger.info(self.vapi.cli("show sr steering policies"))
+
+ # create packets
+ count = len(self.pg_packet_sizes)
+ dst_inner = '7.1.1.123'
+ pkts = []
+
+ # create IPv4 packets
+ packet_header = self.create_packet_header_IPv4(dst_inner)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_T_Encaps_IPv4)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SR steering
+ pol_steering.remove_vpp_config()
+ self.logger.info(self.vapi.cli("show sr steering policies"))
+
+ # remove SR Policies
+ self.sr_policy.remove_vpp_config()
+ self.logger.info(self.vapi.cli("show sr policies"))
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ @unittest.skip("VPP crashes after running this test")
+ def test_SRv6_T_Encaps_L2(self):
+ """ Test SRv6 Transit.Encaps behavior for L2.
+ """
+ # send traffic to one destination interface
+ # source interface is IPv4 only TODO?
+ # destination interface is IPv6 only
+ self.setup_interfaces(ipv6=[False, True], ipv4=[False, False])
+
+ # configure FIB entries
+ route = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+
+ # configure encaps IPv6 source address
+ # needs to be done before SR Policy config
+ # TODO: API?
+ self.vapi.cli("set sr encaps source addr a3::")
+
+ bsid = 'a3::9999:1'
+ # configure SRv6 Policy
+ # Note: segment list order: first -> last
+ sr_policy = VppSRv6Policy(
+ self, bsid=bsid,
+ is_encap=1,
+ sr_type=SRv6PolicyType.SR_POLICY_TYPE_DEFAULT,
+ weight=1, fib_table=0,
+ segments=['a4::', 'a5::', 'a6::c7'],
+ source='a3::')
+ sr_policy.add_vpp_config()
+ self.sr_policy = sr_policy
+
+ # log the sr policies
+ self.logger.info(self.vapi.cli("show sr policies"))
+
+ # steer L2 traffic into SRv6 Policy
+ # use the bsid of the above self.sr_policy
+ pol_steering = VppSRv6Steering(
+ self,
+ bsid=self.sr_policy.bsid,
+ prefix="::", mask_width=0,
+ traffic_type=SRv6PolicySteeringTypes.SR_STEER_L2,
+ sr_policy_index=0, table_id=0,
+ sw_if_index=self.pg0.sw_if_index)
+ pol_steering.add_vpp_config()
+
+ # log the sr steering policies
+ self.logger.info(self.vapi.cli("show sr steering policies"))
+
+ # create packets
+ count = len(self.pg_packet_sizes)
+ pkts = []
+
+ # create L2 packets without dot1q header
+ packet_header = self.create_packet_header_L2()
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # create L2 packets with dot1q header
+ packet_header = self.create_packet_header_L2(vlan=123)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_T_Encaps_L2)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SR steering
+ pol_steering.remove_vpp_config()
+ self.logger.info(self.vapi.cli("show sr steering policies"))
+
+ # remove SR Policies
+ self.sr_policy.remove_vpp_config()
+ self.logger.info(self.vapi.cli("show sr policies"))
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_End(self):
+ """ Test SRv6 End (without PSP) behavior.
+ """
+ # send traffic to one destination interface
+ # source and destination interfaces are IPv6 only
+ self.setup_interfaces(ipv6=[True, True])
+
+ # configure FIB entries
+ route = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+
+ # configure SRv6 localSID End without PSP behavior
+ localsid = VppSRv6LocalSID(
+ self, localsid_addr='A3::0',
+ behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_END,
+ nh_addr='::',
+ end_psp=0,
+ sw_if_index=0,
+ vlan_index=0,
+ fib_table=0)
+ localsid.add_vpp_config()
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # create IPv6 packets with SRH (SL=2, SL=1, SL=0)
+ # send one packet per SL value per packet size
+ # SL=0 packet with localSID End with USP needs 2nd SRH
+ count = len(self.pg_packet_sizes)
+ dst_inner = 'a4::1234'
+ pkts = []
+
+ # packets with segments-left 2, active segment a3::
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a5::', 'a4::', 'a3::'],
+ segleft=2)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets with segments-left 1, active segment a3::
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a4::', 'a3::', 'a2::'],
+ segleft=1)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # TODO: test behavior with SL=0 packet (needs 2*SRH?)
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_End)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ localsid.remove_vpp_config()
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_End_with_PSP(self):
+ """ Test SRv6 End with PSP behavior.
+ """
+ # send traffic to one destination interface
+ # source and destination interfaces are IPv6 only
+ self.setup_interfaces(ipv6=[True, True])
+
+ # configure FIB entries
+ route = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+
+ # configure SRv6 localSID End with PSP behavior
+ localsid = VppSRv6LocalSID(
+ self, localsid_addr='A3::0',
+ behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_END,
+ nh_addr='::',
+ end_psp=1,
+ sw_if_index=0,
+ vlan_index=0,
+ fib_table=0)
+ localsid.add_vpp_config()
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # create IPv6 packets with SRH (SL=2, SL=1)
+ # send one packet per SL value per packet size
+ # SL=0 packet with localSID End with PSP is dropped
+ count = len(self.pg_packet_sizes)
+ dst_inner = 'a4::1234'
+ pkts = []
+
+ # packets with segments-left 2, active segment a3::
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a5::', 'a4::', 'a3::'],
+ segleft=2)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets with segments-left 1, active segment a3::
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a4::', 'a3::', 'a2::'],
+ segleft=1)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_End_PSP)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ localsid.remove_vpp_config()
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_End_X(self):
+ """ Test SRv6 End.X (without PSP) behavior.
+ """
+ # create three interfaces (1 source, 2 destinations)
+ # source and destination interfaces are IPv6 only
+ self.setup_interfaces(ipv6=[True, True, True])
+
+ # configure FIB entries
+ # a4::/64 via pg1 and pg2
+ route = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6),
+ VppRoutePath(self.pg2.remote_ip6,
+ self.pg2.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+ self.logger.debug(self.vapi.cli("show ip6 fib"))
+
+ # configure SRv6 localSID End.X without PSP behavior
+ # End.X points to interface pg1
+ localsid = VppSRv6LocalSID(
+ self, localsid_addr='A3::C4',
+ behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_X,
+ nh_addr=self.pg1.remote_ip6,
+ end_psp=0,
+ sw_if_index=self.pg1.sw_if_index,
+ vlan_index=0,
+ fib_table=0)
+ localsid.add_vpp_config()
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # create IPv6 packets with SRH (SL=2, SL=1)
+ # send one packet per SL value per packet size
+ # SL=0 packet with localSID End with PSP is dropped
+ count = len(self.pg_packet_sizes)
+ dst_inner = 'a4::1234'
+ pkts = []
+
+ # packets with segments-left 2, active segment a3::c4
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a5::', 'a4::', 'a3::c4'],
+ segleft=2)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets with segments-left 1, active segment a3::c4
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a4::', 'a3::c4', 'a2::'],
+ segleft=1)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ # using same comparison function as End (no PSP)
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_End)
+
+ # assert nothing was received on the other interface (pg2)
+ self.pg2.assert_nothing_captured("mis-directed packet(s)")
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ localsid.remove_vpp_config()
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_End_X_with_PSP(self):
+ """ Test SRv6 End.X with PSP behavior.
+ """
+ # create three interfaces (1 source, 2 destinations)
+ # source and destination interfaces are IPv6 only
+ self.setup_interfaces(ipv6=[True, True, True])
+
+ # configure FIB entries
+ # a4::/64 via pg1 and pg2
+ route = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6),
+ VppRoutePath(self.pg2.remote_ip6,
+ self.pg2.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6)],
+ is_ip6=1)
+ route.add_vpp_config()
+
+ # configure SRv6 localSID End with PSP behavior
+ localsid = VppSRv6LocalSID(
+ self, localsid_addr='A3::C4',
+ behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_X,
+ nh_addr=self.pg1.remote_ip6,
+ end_psp=1,
+ sw_if_index=self.pg1.sw_if_index,
+ vlan_index=0,
+ fib_table=0)
+ localsid.add_vpp_config()
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # create IPv6 packets with SRH (SL=2, SL=1)
+ # send one packet per SL value per packet size
+ # SL=0 packet with localSID End with PSP is dropped
+ count = len(self.pg_packet_sizes)
+ dst_inner = 'a4::1234'
+ pkts = []
+
+ # packets with segments-left 2, active segment a3::
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a5::', 'a4::', 'a3::c4'],
+ segleft=2)
+ # create traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets with segments-left 1, active segment a3::
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a4::', 'a3::c4', 'a2::'],
+ segleft=1)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ # using same comparison function as End with PSP
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_End_PSP)
+
+ # assert nothing was received on the other interface (pg2)
+ self.pg2.assert_nothing_captured("mis-directed packet(s)")
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ localsid.remove_vpp_config()
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_End_DX6(self):
+ """ Test SRv6 End.DX6 behavior.
+ """
+ # send traffic to one destination interface
+ # source and destination interfaces are IPv6 only
+ self.setup_interfaces(ipv6=[True, True])
+
+ # configure SRv6 localSID End.DX6 behavior
+ localsid = VppSRv6LocalSID(
+ self, localsid_addr='a3::c4',
+ behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DX6,
+ nh_addr=self.pg1.remote_ip6,
+ end_psp=0,
+ sw_if_index=self.pg1.sw_if_index,
+ vlan_index=0,
+ fib_table=0)
+ localsid.add_vpp_config()
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # create IPv6 packets with SRH (SL=0)
+ # send one packet per packet size
+ count = len(self.pg_packet_sizes)
+ dst_inner = 'a4::1234' # inner header destination address
+ pkts = []
+
+ # packets with SRH, segments-left 0, active segment a3::c4
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a3::c4', 'a2::', 'a1::'],
+ segleft=0)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets without SRH, IPv6 in IPv6
+ # outer IPv6 dest addr is the localsid End.DX6
+ packet_header = self.create_packet_header_IPv6_IPv6(
+ dst_inner,
+ dst_outer='a3::c4')
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_End_DX6)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ localsid.remove_vpp_config()
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_End_DT6(self):
+ """ Test SRv6 End.DT6 behavior.
+ """
+ # create three interfaces (1 source, 2 destinations)
+ # all interfaces are IPv6 only
+ # source interface in global FIB (0)
+ # destination interfaces in global and vrf
+ vrf_1 = 1
+ self.setup_interfaces(ipv6=[True, True, True],
+ ipv6_table_id=[0, 0, vrf_1])
+
+ # configure FIB entries
+ # a4::/64 is reachable
+ # via pg1 in table 0 (global)
+ # and via pg2 in table vrf_1
+ route0 = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6,
+ nh_table_id=0)],
+ table_id=0,
+ is_ip6=1)
+ route0.add_vpp_config()
+ route1 = VppIpRoute(self, "a4::", 64,
+ [VppRoutePath(self.pg2.remote_ip6,
+ self.pg2.sw_if_index,
+ proto=DpoProto.DPO_PROTO_IP6,
+ nh_table_id=vrf_1)],
+ table_id=vrf_1,
+ is_ip6=1)
+ route1.add_vpp_config()
+ self.logger.debug(self.vapi.cli("show ip6 fib"))
+
+ # configure SRv6 localSID End.DT6 behavior
+ # Note:
+ # fib_table: where the localsid is installed
+ # sw_if_index: in T-variants of localsid this is the vrf table_id
+ localsid = VppSRv6LocalSID(
+ self, localsid_addr='a3::c4',
+ behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DT6,
+ nh_addr='::',
+ end_psp=0,
+ sw_if_index=vrf_1,
+ vlan_index=0,
+ fib_table=0)
+ localsid.add_vpp_config()
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # create IPv6 packets with SRH (SL=0)
+ # send one packet per packet size
+ count = len(self.pg_packet_sizes)
+ dst_inner = 'a4::1234' # inner header destination address
+ pkts = []
+
+ # packets with SRH, segments-left 0, active segment a3::c4
+ packet_header = self.create_packet_header_IPv6_SRH_IPv6(
+ dst_inner,
+ sidlist=['a3::c4', 'a2::', 'a1::'],
+ segleft=0)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets without SRH, IPv6 in IPv6
+ # outer IPv6 dest addr is the localsid End.DT6
+ packet_header = self.create_packet_header_IPv6_IPv6(
+ dst_inner,
+ dst_outer='a3::c4')
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ # using same comparison function as End.DX6
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg2,
+ self.compare_rx_tx_packet_End_DX6)
+
+ # assert nothing was received on the other interface (pg2)
+ self.pg1.assert_nothing_captured("mis-directed packet(s)")
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ localsid.remove_vpp_config()
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_End_DX4(self):
+ """ Test SRv6 End.DX4 behavior.
+ """
+ # send traffic to one destination interface
+ # source interface is IPv6 only
+ # destination interface is IPv4 only
+ self.setup_interfaces(ipv6=[True, False], ipv4=[False, True])
+
+ # configure SRv6 localSID End.DX4 behavior
+ localsid = VppSRv6LocalSID(
+ self, localsid_addr='a3::c4',
+ behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DX4,
+ nh_addr=self.pg1.remote_ip4,
+ end_psp=0,
+ sw_if_index=self.pg1.sw_if_index,
+ vlan_index=0,
+ fib_table=0)
+ localsid.add_vpp_config()
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # send one packet per packet size
+ count = len(self.pg_packet_sizes)
+ dst_inner = '4.1.1.123' # inner header destination address
+ pkts = []
+
+ # packets with SRH, segments-left 0, active segment a3::c4
+ packet_header = self.create_packet_header_IPv6_SRH_IPv4(
+ dst_inner,
+ sidlist=['a3::c4', 'a2::', 'a1::'],
+ segleft=0)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets without SRH, IPv4 in IPv6
+ # outer IPv6 dest addr is the localsid End.DX4
+ packet_header = self.create_packet_header_IPv6_IPv4(
+ dst_inner,
+ dst_outer='a3::c4')
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_End_DX4)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ localsid.remove_vpp_config()
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_End_DT4(self):
+ """ Test SRv6 End.DT4 behavior.
+ """
+ # create three interfaces (1 source, 2 destinations)
+ # source interface is IPv6-only
+ # destination interfaces are IPv4 only
+ # source interface in global FIB (0)
+ # destination interfaces in global and vrf
+ vrf_1 = 1
+ self.setup_interfaces(ipv6=[True, False, False],
+ ipv4=[False, True, True],
+ ipv6_table_id=[0, 0, 0],
+ ipv4_table_id=[0, 0, vrf_1])
+
+ # configure FIB entries
+ # 4.1.1.0/24 is reachable
+ # via pg1 in table 0 (global)
+ # and via pg2 in table vrf_1
+ route0 = VppIpRoute(self, "4.1.1.0", 24,
+ [VppRoutePath(self.pg1.remote_ip4,
+ self.pg1.sw_if_index,
+ nh_table_id=0)],
+ table_id=0,
+ is_ip6=0)
+ route0.add_vpp_config()
+ route1 = VppIpRoute(self, "4.1.1.0", 24,
+ [VppRoutePath(self.pg2.remote_ip4,
+ self.pg2.sw_if_index,
+ nh_table_id=vrf_1)],
+ table_id=vrf_1,
+ is_ip6=0)
+ route1.add_vpp_config()
+ self.logger.debug(self.vapi.cli("show ip fib"))
+
+ # configure SRv6 localSID End.DT6 behavior
+ # Note:
+ # fib_table: where the localsid is installed
+ # sw_if_index: in T-variants of localsid: vrf table_id
+ localsid = VppSRv6LocalSID(
+ self, localsid_addr='a3::c4',
+ behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DT4,
+ nh_addr='::',
+ end_psp=0,
+ sw_if_index=vrf_1,
+ vlan_index=0,
+ fib_table=0)
+ localsid.add_vpp_config()
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # create IPv6 packets with SRH (SL=0)
+ # send one packet per packet size
+ count = len(self.pg_packet_sizes)
+ dst_inner = '4.1.1.123' # inner header destination address
+ pkts = []
+
+ # packets with SRH, segments-left 0, active segment a3::c4
+ packet_header = self.create_packet_header_IPv6_SRH_IPv4(
+ dst_inner,
+ sidlist=['a3::c4', 'a2::', 'a1::'],
+ segleft=0)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets without SRH, IPv6 in IPv6
+ # outer IPv6 dest addr is the localsid End.DX4
+ packet_header = self.create_packet_header_IPv6_IPv4(
+ dst_inner,
+ dst_outer='a3::c4')
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg2, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ # using same comparison function as End.DX4
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg2,
+ self.compare_rx_tx_packet_End_DX4)
+
+ # assert nothing was received on the other interface (pg2)
+ self.pg1.assert_nothing_captured("mis-directed packet(s)")
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ localsid.remove_vpp_config()
+
+ # remove FIB entries
+ # done by tearDown
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def test_SRv6_End_DX2(self):
+ """ Test SRv6 End.DX2 behavior.
+ """
+ # send traffic to one destination interface
+ # source interface is IPv6 only
+ self.setup_interfaces(ipv6=[True, False], ipv4=[False, False])
+
+ # configure SRv6 localSID End.DX2 behavior
+ localsid = VppSRv6LocalSID(
+ self, localsid_addr='a3::c4',
+ behavior=SRv6LocalSIDBehaviors.SR_BEHAVIOR_DX2,
+ nh_addr='::',
+ end_psp=0,
+ sw_if_index=self.pg1.sw_if_index,
+ vlan_index=0,
+ fib_table=0)
+ localsid.add_vpp_config()
+ # log the localsids
+ self.logger.debug(self.vapi.cli("show sr localsid"))
+
+ # send one packet per packet size
+ count = len(self.pg_packet_sizes)
+ pkts = []
+
+ # packets with SRH, segments-left 0, active segment a3::c4
+ # L2 has no dot1q header
+ packet_header = self.create_packet_header_IPv6_SRH_L2(
+ sidlist=['a3::c4', 'a2::', 'a1::'],
+ segleft=0,
+ vlan=0)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets with SRH, segments-left 0, active segment a3::c4
+ # L2 has dot1q header
+ packet_header = self.create_packet_header_IPv6_SRH_L2(
+ sidlist=['a3::c4', 'a2::', 'a1::'],
+ segleft=0,
+ vlan=123)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets without SRH, L2 in IPv6
+ # outer IPv6 dest addr is the localsid End.DX2
+ # L2 has no dot1q header
+ packet_header = self.create_packet_header_IPv6_L2(
+ dst_outer='a3::c4',
+ vlan=0)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # packets without SRH, L2 in IPv6
+ # outer IPv6 dest addr is the localsid End.DX2
+ # L2 has dot1q header
+ packet_header = self.create_packet_header_IPv6_L2(
+ dst_outer='a3::c4',
+ vlan=123)
+ # add to traffic stream pg0->pg1
+ pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header,
+ self.pg_packet_sizes, count))
+
+ # send packets and verify received packets
+ self.send_and_verify_pkts(self.pg0, pkts, self.pg1,
+ self.compare_rx_tx_packet_End_DX2)
+
+ # log the localsid counters
+ self.logger.info(self.vapi.cli("show sr localsid"))
+
+ # remove SRv6 localSIDs
+ localsid.remove_vpp_config()
+
+ # cleanup interfaces
+ self.teardown_interfaces()
+
+ def compare_rx_tx_packet_T_Encaps(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing T.Encaps
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+ # T.Encaps updates the headers as follows:
+ # SR Policy seglist (S3, S2, S1)
+ # SR Policy source C
+ # IPv6:
+ # in: IPv6(A, B2)
+ # out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)IPv6(A, B2)
+ # IPv6 + SRH:
+ # in: IPv6(A, B2)SRH(B3, B2, B1; SL=1)
+ # out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)IPv6(a, B2)SRH(B3, B2, B1; SL=1)
+
+ # 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
+ seglist = self.sr_policy.segments
+ # reverse list to get order as in SRH
+ tx_seglist = seglist[::-1]
+
+ # get source address of SR Policy
+ sr_policy_source = self.sr_policy.source
+
+ # rx'ed packet should have SRH
+ self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ # get SRH
+ rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+
+ # received ip.src should be equal to SR Policy source
+ self.assertEqual(rx_ip.src, sr_policy_source)
+ # received ip.dst should be equal to expected sidlist[lastentry]
+ self.assertEqual(rx_ip.dst, tx_seglist[-1])
+ # 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)
+
+ # 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(rx_srh.payload, tx_ip)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def compare_rx_tx_packet_T_Encaps_IPv4(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing T.Encaps for IPv4
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+ # T.Encaps for IPv4 updates the headers as follows:
+ # SR Policy seglist (S3, S2, S1)
+ # SR Policy source C
+ # IPv4:
+ # in: IPv4(A, B2)
+ # out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)IPv4(A, B2)
+
+ # 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
+ seglist = self.sr_policy.segments
+ # reverse list to get order as in SRH
+ tx_seglist = seglist[::-1]
+
+ # get source address of SR Policy
+ sr_policy_source = self.sr_policy.source
+
+ # checks common to cases tx with and without SRH
+ # 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)
+
+ # received ip.src should be equal to SR Policy source
+ self.assertEqual(rx_ip.src, sr_policy_source)
+ # received ip.dst should be equal to sidlist[lastentry]
+ self.assertEqual(rx_ip.dst, tx_seglist[-1])
+ # 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)
+
+ # 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(rx_srh.payload, tx_ip)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def compare_rx_tx_packet_T_Encaps_L2(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing T.Encaps for L2
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+ # T.Encaps for L2 updates the headers as follows:
+ # SR Policy seglist (S3, S2, S1)
+ # SR Policy source C
+ # L2:
+ # in: L2
+ # out: IPv6(C, S1)SRH(S3, S2, S1; SL=2)L2
+
+ # get first (outer) IPv6 header of rx'ed packet
+ rx_ip = rx_pkt.getlayer(IPv6)
+ rx_srh = None
+
+ tx_ether = tx_pkt.getlayer(Ether)
+
+ # expected segment-list
+ seglist = self.sr_policy.segments
+ # reverse list to get order as in SRH
+ tx_seglist = seglist[::-1]
+
+ # get source address of SR Policy
+ sr_policy_source = self.sr_policy.source
+
+ # rx'ed packet should have SRH
+ self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ # get SRH
+ rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+
+ # received ip.src should be equal to SR Policy source
+ self.assertEqual(rx_ip.src, sr_policy_source)
+ # received ip.dst should be equal to sidlist[lastentry]
+ self.assertEqual(rx_ip.dst, tx_seglist[-1])
+ # 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)
+ # nh should be "No Next Header" (59)
+ self.assertEqual(rx_srh.nh, 59)
+
+ # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
+ self.assertEqual(Ether(str(rx_srh.payload)), tx_ether)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def compare_rx_tx_packet_T_Insert(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing T.Insert
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+ # T.Insert updates the headers as follows:
+ # IPv6:
+ # in: IPv6(A, B2)
+ # out: IPv6(A, S1)SRH(B2, S3, S2, S1; SL=3)
+ # IPv6 + SRH:
+ # in: IPv6(A, B2)SRH(B3, B2, B1; SL=1)
+ # out: IPv6(A, S1)SRH(B2, S3, S2, S1; SL=3)SRH(B3, B2, B1; SL=1)
+
+ # get first (outer) IPv6 header of rx'ed packet
+ rx_ip = rx_pkt.getlayer(IPv6)
+ rx_srh = None
+ rx_ip2 = None
+ rx_srh2 = None
+ rx_ip3 = None
+ rx_udp = rx_pkt[UDP]
+
+ tx_ip = tx_pkt.getlayer(IPv6)
+ tx_srh = None
+ tx_ip2 = None
+ # some packets have been tx'ed with an SRH, some without it
+ # get SRH if tx'ed packet has it
+ if tx_pkt.haslayer(IPv6ExtHdrSegmentRouting):
+ tx_srh = tx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+ tx_ip2 = tx_pkt.getlayer(IPv6, 2)
+ tx_udp = tx_pkt[UDP]
+
+ # expected segment-list (make copy of SR Policy segment list)
+ seglist = self.sr_policy.segments[:]
+ # expected seglist has initial dest addr as last segment
+ seglist.append(tx_ip.dst)
+ # reverse list to get order as in SRH
+ tx_seglist = seglist[::-1]
+
+ # get source address of SR Policy
+ sr_policy_source = self.sr_policy.source
+
+ # checks common to cases tx with and without SRH
+ # rx'ed packet should have SRH and only one IPv6 header
+ self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ self.assertFalse(rx_ip.payload.haslayer(IPv6))
+ # get SRH
+ rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+
+ # rx'ed ip.src should be equal to tx'ed ip.src
+ self.assertEqual(rx_ip.src, tx_ip.src)
+ # rx'ed ip.dst should be equal to sidlist[lastentry]
+ self.assertEqual(rx_ip.dst, tx_seglist[-1])
+
+ # 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)
+
+ if tx_srh: # packet was tx'ed with SRH
+ # packet should have 2nd SRH
+ self.assertTrue(rx_srh.payload.haslayer(IPv6ExtHdrSegmentRouting))
+ # get 2nd SRH
+ rx_srh2 = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting, 2)
+
+ # rx'ed srh2.addresses should be equal to tx'ed srh.addresses
+ self.assertEqual(rx_srh2.addresses, tx_srh.addresses)
+ # rx'ed srh2.segleft should be equal to tx'ed srh.segleft
+ self.assertEqual(rx_srh2.segleft, tx_srh.segleft)
+ # rx'ed srh2.lastentry should be equal to tx'ed srh.lastentry
+ self.assertEqual(rx_srh2.lastentry, tx_srh.lastentry)
+
+ else: # packet was tx'ed without SRH
+ # rx packet should have no other SRH
+ self.assertFalse(rx_srh.payload.haslayer(IPv6ExtHdrSegmentRouting))
+
+ # UDP layer should be unchanged
+ self.assertEqual(rx_udp, tx_udp)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def compare_rx_tx_packet_End(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing End (without PSP)
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+ # End (no PSP) updates the headers as follows:
+ # IPv6 + SRH:
+ # in: IPv6(A, S1)SRH(S3, S2, S1; SL=2)
+ # out: IPv6(A, S2)SRH(S3, S2, S1; SL=1)
+
+ # get first (outer) IPv6 header of rx'ed packet
+ rx_ip = rx_pkt.getlayer(IPv6)
+ rx_srh = None
+ rx_ip2 = None
+ rx_udp = rx_pkt[UDP]
+
+ tx_ip = tx_pkt.getlayer(IPv6)
+ # we know the packet has been tx'ed
+ # with an inner IPv6 header and an SRH
+ tx_ip2 = tx_pkt.getlayer(IPv6, 2)
+ tx_srh = tx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+ tx_udp = tx_pkt[UDP]
+
+ # common checks, regardless of tx segleft value
+ # rx'ed packet should have 2nd IPv6 header
+ self.assertTrue(rx_ip.payload.haslayer(IPv6))
+ # get second (inner) IPv6 header
+ rx_ip2 = rx_pkt.getlayer(IPv6, 2)
+
+ if tx_ip.segleft > 0:
+ # SRH should NOT have been popped:
+ # End SID without PSP does not pop SRH if segleft>0
+ self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+
+ # received ip.src should be equal to expected ip.src
+ self.assertEqual(rx_ip.src, tx_ip.src)
+ # sidlist should be unchanged
+ self.assertEqual(rx_srh.addresses, tx_srh.addresses)
+ # segleft should have been decremented
+ self.assertEqual(rx_srh.segleft, tx_srh.segleft-1)
+ # received ip.dst should be equal to sidlist[segleft]
+ self.assertEqual(rx_ip.dst, rx_srh.addresses[rx_srh.segleft])
+ # lastentry should be unchanged
+ self.assertEqual(rx_srh.lastentry, tx_srh.lastentry)
+ # inner IPv6 packet (ip2) should be unchanged
+ self.assertEqual(rx_ip2.src, tx_ip2.src)
+ self.assertEqual(rx_ip2.dst, tx_ip2.dst)
+ # else: # tx_ip.segleft == 0
+ # TODO: Does this work with 2 SRHs in ingress packet?
+
+ # UDP layer should be unchanged
+ self.assertEqual(rx_udp, tx_udp)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def compare_rx_tx_packet_End_PSP(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing End with PSP
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+ # End (PSP) updates the headers as follows:
+ # IPv6 + SRH (SL>1):
+ # in: IPv6(A, S1)SRH(S3, S2, S1; SL=2)
+ # out: IPv6(A, S2)SRH(S3, S2, S1; SL=1)
+ # IPv6 + SRH (SL=1):
+ # in: IPv6(A, S2)SRH(S3, S2, S1; SL=1)
+ # out: IPv6(A, S3)
+
+ # get first (outer) IPv6 header of rx'ed packet
+ rx_ip = rx_pkt.getlayer(IPv6)
+ rx_srh = None
+ rx_ip2 = None
+ rx_udp = rx_pkt[UDP]
+
+ tx_ip = tx_pkt.getlayer(IPv6)
+ # we know the packet has been tx'ed
+ # with an inner IPv6 header and an SRH
+ tx_ip2 = tx_pkt.getlayer(IPv6, 2)
+ tx_srh = tx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+ tx_udp = tx_pkt[UDP]
+
+ # common checks, regardless of tx segleft value
+ self.assertTrue(rx_ip.payload.haslayer(IPv6))
+ rx_ip2 = rx_pkt.getlayer(IPv6, 2)
+ # inner IPv6 packet (ip2) should be unchanged
+ self.assertEqual(rx_ip2.src, tx_ip2.src)
+ self.assertEqual(rx_ip2.dst, tx_ip2.dst)
+
+ if tx_ip.segleft > 1:
+ # SRH should NOT have been popped:
+ # End SID with PSP does not pop SRH if segleft>1
+ # rx'ed packet should have SRH
+ self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
+
+ # received ip.src should be equal to expected ip.src
+ self.assertEqual(rx_ip.src, tx_ip.src)
+ # sidlist should be unchanged
+ self.assertEqual(rx_srh.addresses, tx_srh.addresses)
+ # segleft should have been decremented
+ self.assertEqual(rx_srh.segleft, tx_srh.segleft-1)
+ # received ip.dst should be equal to sidlist[segleft]
+ self.assertEqual(rx_ip.dst, rx_srh.addresses[rx_srh.segleft])
+ # lastentry should be unchanged
+ self.assertEqual(rx_srh.lastentry, tx_srh.lastentry)
+
+ else: # tx_ip.segleft <= 1
+ # SRH should have been popped:
+ # End SID with PSP and segleft=1 pops SRH
+ # the two IPv6 headers are still present
+ # outer IPv6 header has DA == last segment of popped SRH
+ # SRH should not be present
+ self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+ # outer IPv6 header ip.src should be equal to tx'ed ip.src
+ self.assertEqual(rx_ip.src, tx_ip.src)
+ # outer IPv6 header ip.dst should be = to tx'ed sidlist[segleft-1]
+ self.assertEqual(rx_ip.dst, tx_srh.addresses[tx_srh.segleft-1])
+
+ # UDP layer should be unchanged
+ self.assertEqual(rx_udp, tx_udp)
+
+ self.logger.debug("packet verification: SUCCESS")
+
+ def compare_rx_tx_packet_End_DX6(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing End.DX6
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+ # End.DX6 updates the headers as follows:
+ # IPv6 + SRH (SL=0):
+ # in: IPv6(A, S3)SRH(S3, S2, S1; SL=0)IPv6(B, D)
+ # out: IPv6(B, D)
+ # IPv6:
+ # in: IPv6(A, S3)IPv6(B, D)
+ # out: IPv6(B, D)
+
+ # 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_DX4(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing End.DX4
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+ # End.DX4 updates the headers as follows:
+ # IPv6 + SRH (SL=0):
+ # in: IPv6(A, S3)SRH(S3, S2, S1; SL=0)IPv4(B, D)
+ # out: IPv4(B, D)
+ # IPv6:
+ # in: IPv6(A, S3)IPv4(B, D)
+ # out: IPv4(B, D)
+
+ # 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 compare_rx_tx_packet_End_DX2(self, tx_pkt, rx_pkt):
+ """ Compare input and output packet after passing End.DX2
+
+ :param tx_pkt: transmitted packet
+ :param rx_pkt: received packet
+ """
+ # End.DX2 updates the headers as follows:
+ # IPv6 + SRH (SL=0):
+ # in: IPv6(A, S3)SRH(S3, S2, S1; SL=0)L2
+ # out: L2
+ # IPv6:
+ # in: IPv6(A, S3)L2
+ # out: L2
+
+ # get IPv4 header of rx'ed packet
+ rx_eth = rx_pkt.getlayer(Ether)
+
+ tx_ip = tx_pkt.getlayer(IPv6)
+ # we can't just get the 2nd Ether layer
+ # get the Raw content and dissect it as Ether
+ tx_eth1 = Ether(str(tx_pkt[Raw]))
+
+ # verify if rx'ed packet has no SRH
+ self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
+
+ # the whole rx_eth pkt should be equal to tx_eth1
+ self.assertEqual(rx_eth, tx_eth1)
+
+ 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, dst):
+ """Create packet header: IPv6 header, UDP header
+
+ :param dst: IPv6 destination address
+
+ IPv6 source address is 1234::1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IPv6(src='1234::1', dst=dst) /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv6_SRH(self, sidlist, segleft):
+ """Create packet header: IPv6 header with SRH, UDP header
+
+ :param list sidlist: segment list
+ :param int segleft: segments-left field value
+
+ IPv6 destination address is set to sidlist[segleft]
+ IPv6 source addresses are 1234::1 and 4321::1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IPv6(src='1234::1', dst=sidlist[segleft]) /
+ IPv6ExtHdrSegmentRouting(addresses=sidlist) /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv6_SRH_IPv6(self, dst, sidlist, segleft):
+ """Create packet header: IPv6 encapsulated in SRv6:
+ IPv6 header with SRH, IPv6 header, UDP header
+
+ :param ipv6address dst: inner IPv6 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 addresses are 1234::1 and 4321::1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IPv6(src='1234::1', dst=sidlist[segleft]) /
+ IPv6ExtHdrSegmentRouting(addresses=sidlist,
+ segleft=segleft, nh=41) /
+ IPv6(src='4321::1', dst=dst) /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv6_IPv6(self, dst_inner, dst_outer):
+ """Create packet header: IPv6 encapsulated in IPv6:
+ IPv6 header, IPv6 header, UDP header
+
+ :param ipv6address dst_inner: inner IPv6 destination address
+ :param ipv6address dst_outer: outer IPv6 destination address
+
+ IPv6 source addresses are 1234::1 and 4321::1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IPv6(src='1234::1', dst=dst_outer) /
+ IPv6(src='4321::1', dst=dst_inner) /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv6_SRH_SRH_IPv6(self, dst, sidlist1, segleft1,
+ sidlist2, segleft2):
+ """Create packet header: IPv6 encapsulated in SRv6 with 2 SRH:
+ IPv6 header with SRH, 2nd SRH, IPv6 header, UDP header
+
+ :param ipv6address dst: inner IPv6 destination address
+ :param list sidlist1: segment list of outer IPv6 SRH
+ :param int segleft1: segments-left field of outer IPv6 SRH
+ :param list sidlist2: segment list of inner IPv6 SRH
+ :param int segleft2: segments-left field of inner IPv6 SRH
+
+ Outer IPv6 destination address is set to sidlist[segleft]
+ IPv6 source addresses are 1234::1 and 4321::1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IPv6(src='1234::1', dst=sidlist1[segleft1]) /
+ IPv6ExtHdrSegmentRouting(addresses=sidlist1,
+ segleft=segleft1, nh=43) /
+ IPv6ExtHdrSegmentRouting(addresses=sidlist2,
+ segleft=segleft2, nh=41) /
+ IPv6(src='4321::1', dst=dst) /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv4(self, dst):
+ """Create packet header: IPv4 header, UDP header
+
+ :param dst: IPv4 destination address
+
+ IPv4 source address is 123.1.1.1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IP(src='123.1.1.1', dst=dst) /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv6_IPv4(self, dst_inner, dst_outer):
+ """Create packet header: IPv4 encapsulated in IPv6:
+ IPv6 header, IPv4 header, UDP header
+
+ :param ipv4address dst_inner: inner IPv4 destination address
+ :param ipv6address dst_outer: outer IPv6 destination address
+
+ IPv6 source address is 1234::1
+ IPv4 source address is 123.1.1.1
+ UDP source port and destination port are 1234
+ """
+
+ p = (IPv6(src='1234::1', dst=dst_outer) /
+ IP(src='123.1.1.1', dst=dst_inner) /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_IPv6_SRH_IPv4(self, dst, 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
+ 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=dst) /
+ UDP(sport=1234, dport=1234))
+ return p
+
+ def create_packet_header_L2(self, vlan=0):
+ """Create packet header: L2 header
+
+ :param vlan: if vlan!=0 then add 802.1q header
+ """
+ # Note: the dst addr ('00:55:44:33:22:11') is used in
+ # the compare function compare_rx_tx_packet_T_Encaps_L2
+ # to detect presence of L2 in SRH payload
+ p = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
+ etype = 0x8137 # IPX
+ if vlan:
+ # add 802.1q layer
+ p /= Dot1Q(vlan=vlan, type=etype)
+ else:
+ p.type = etype
+ return p
+
+ def create_packet_header_IPv6_SRH_L2(self, sidlist, segleft, vlan=0):
+ """Create packet header: L2 encapsulated in SRv6:
+ IPv6 header with SRH, L2
+
+ :param list sidlist: segment list of outer IPv6 SRH
+ :param int segleft: segments-left field of outer IPv6 SRH
+ :param vlan: L2 vlan; if vlan!=0 then add 802.1q header
+
+ Outer IPv6 destination address is set to sidlist[segleft]
+ IPv6 source address is 1234::1
+ """
+ eth = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
+ etype = 0x8137 # IPX
+ if vlan:
+ # add 802.1q layer
+ eth /= Dot1Q(vlan=vlan, type=etype)
+ else:
+ eth.type = etype
+
+ p = (IPv6(src='1234::1', dst=sidlist[segleft]) /
+ IPv6ExtHdrSegmentRouting(addresses=sidlist,
+ segleft=segleft, nh=59) /
+ eth)
+ return p
+
+ def create_packet_header_IPv6_L2(self, dst_outer, vlan=0):
+ """Create packet header: L2 encapsulated in IPv6:
+ IPv6 header, L2
+
+ :param ipv6address dst_outer: outer IPv6 destination address
+ :param vlan: L2 vlan; if vlan!=0 then add 802.1q header
+ """
+ eth = Ether(src='00:11:22:33:44:55', dst='00:55:44:33:22:11')
+ etype = 0x8137 # IPX
+ if vlan:
+ # add 802.1q layer
+ eth /= Dot1Q(vlan=vlan, type=etype)
+ else:
+ eth.type = etype
+
+ p = (IPv6(src='1234::1', dst=dst_outer, nh=59) / eth)
+ 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