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Diffstat (limited to 'test/test_srv6.py')
| -rw-r--r-- | test/test_srv6.py | 1997 |
1 files changed, 1997 insertions, 0 deletions
diff --git a/test/test_srv6.py b/test/test_srv6.py new file mode 100644 index 00000000000..a31b30eb619 --- /dev/null +++ b/test/test_srv6.py @@ -0,0 +1,1997 @@ +#!/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) |