| #!/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) |