+++ /dev/null
-#!/usr/bin/env python
-
-import unittest
-import binascii
-from socket import AF_INET6
-
-from framework import VppTestCase, VppTestRunner
-from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathProto, VppIpTable
-from vpp_srv6 import SRv6LocalSIDBehaviors, VppSRv6LocalSID, VppSRv6Policy, \
- SRv6PolicyType, VppSRv6Steering, SRv6PolicySteeringTypes
-
-import scapy.compat
-from scapy.packet import Raw
-from scapy.layers.l2 import Ether, Dot1Q
-from scapy.layers.inet6 import IPv6, UDP, IPv6ExtHdrSegmentRouting
-from scapy.layers.inet import IP, UDP
-
-from scapy.utils import inet_pton, inet_ntop
-
-from util import ppp
-
-
-class TestSRv6(VppTestCase):
- """ SRv6 Static Proxy plugin Test Case """
-
- @classmethod
- def setUpClass(self):
- super(TestSRv6, self).setUpClass()
-
- @classmethod
- def tearDownClass(cls):
- super(TestSRv6, cls).tearDownClass()
-
- def setUp(self):
- """ Perform test setup before each test case.
- """
- super(TestSRv6, self).setUp()
-
- # packet sizes, inclusive L2 overhead
- self.pg_packet_sizes = [64, 512, 1518, 9018]
-
- # reset packet_infos
- self.reset_packet_infos()
-
- def tearDown(self):
- """ Clean up test setup after each test case.
- """
- self.teardown_interfaces()
-
- super(TestSRv6, self).tearDown()
-
- def configure_interface(self,
- interface,
- ipv6=False, ipv4=False,
- ipv6_table_id=0, ipv4_table_id=0):
- """ Configure interface.
- :param ipv6: configure IPv6 on interface
- :param ipv4: configure IPv4 on interface
- :param ipv6_table_id: FIB table_id for IPv6
- :param ipv4_table_id: FIB table_id for IPv4
- """
- self.logger.debug("Configuring interface %s" % (interface.name))
- if ipv6:
- self.logger.debug("Configuring IPv6")
- interface.set_table_ip6(ipv6_table_id)
- interface.config_ip6()
- interface.resolve_ndp(timeout=5)
- if ipv4:
- self.logger.debug("Configuring IPv4")
- interface.set_table_ip4(ipv4_table_id)
- interface.config_ip4()
- interface.resolve_arp()
- interface.admin_up()
-
- def setup_interfaces(self, ipv6=[], ipv4=[],
- ipv6_table_id=[], ipv4_table_id=[]):
- """ Create and configure interfaces.
-
- :param ipv6: list of interface IPv6 capabilities
- :param ipv4: list of interface IPv4 capabilities
- :param ipv6_table_id: list of intf IPv6 FIB table_ids
- :param ipv4_table_id: list of intf IPv4 FIB table_ids
- :returns: List of created interfaces.
- """
- # how many interfaces?
- if len(ipv6):
- count = len(ipv6)
- else:
- count = len(ipv4)
- self.logger.debug("Creating and configuring %d interfaces" % (count))
-
- # fill up ipv6 and ipv4 lists if needed
- # not enabled (False) is the default
- if len(ipv6) < count:
- ipv6 += (count - len(ipv6)) * [False]
- if len(ipv4) < count:
- ipv4 += (count - len(ipv4)) * [False]
-
- # fill up table_id lists if needed
- # table_id 0 (global) is the default
- if len(ipv6_table_id) < count:
- ipv6_table_id += (count - len(ipv6_table_id)) * [0]
- if len(ipv4_table_id) < count:
- ipv4_table_id += (count - len(ipv4_table_id)) * [0]
-
- # create 'count' pg interfaces
- self.create_pg_interfaces(range(count))
-
- # setup all interfaces
- for i in range(count):
- intf = self.pg_interfaces[i]
- self.configure_interface(intf,
- ipv6[i], ipv4[i],
- ipv6_table_id[i], ipv4_table_id[i])
-
- if any(ipv6):
- self.logger.debug(self.vapi.cli("show ip6 neighbors"))
- if any(ipv4):
- self.logger.debug(self.vapi.cli("show ip arp"))
- self.logger.debug(self.vapi.cli("show interface"))
- self.logger.debug(self.vapi.cli("show hardware"))
-
- return self.pg_interfaces
-
- def teardown_interfaces(self):
- """ Unconfigure and bring down interface.
- """
- self.logger.debug("Tearing down interfaces")
- # tear down all interfaces
- # AFAIK they cannot be deleted
- for i in self.pg_interfaces:
- self.logger.debug("Tear down interface %s" % (i.name))
- i.admin_down()
- i.unconfig()
- i.set_table_ip4(0)
- i.set_table_ip6(0)
-
- def test_SRv6_End_AS_IPv6_noSRH(self):
- """ Test SRv6 End.AS behavior with IPv6 traffic and no SRH rewrite.
- """
- self.run_SRv6_End_AS_IPv6(
- sid_list=['a1::', 'a2::a6', 'a3::'],
- test_sid_index=1,
- rewrite_src_addr='a2::')
-
- def test_SRv6_End_AS_IPv6_SRH(self):
- """ Test SRv6 End.AS behavior with IPv6 traffic and SRH rewrite.
- """
- self.run_SRv6_End_AS_IPv6(
- sid_list=['a1::a6', 'a2::', 'a3::'],
- test_sid_index=0,
- rewrite_src_addr='a1::')
-
- def test_SRv6_End_AS_IPv4_noSRH(self):
- """ Test SRv6 End.AS behavior with IPv4 traffic and no SRH rewrite.
- """
- self.run_SRv6_End_AS_IPv4(
- sid_list=['a1::', 'a2::a6', 'a3::'],
- test_sid_index=1,
- rewrite_src_addr='a2::')
-
- def test_SRv6_End_AS_IPv4_SRH(self):
- """ Test SRv6 End.AS behavior with IPv4 traffic and SRH rewrite.
- """
- self.run_SRv6_End_AS_IPv4(
- sid_list=['a1::a6', 'a2::', 'a3::'],
- test_sid_index=0,
- rewrite_src_addr='a1::')
-
- def test_SRv6_End_AS_L2_noSRH(self):
- """ Test SRv6 End.AS behavior with L2 traffic and no SRH rewrite.
- """
- self.run_SRv6_End_AS_L2(
- sid_list=['a1::', 'a2::a6', 'a3::'],
- test_sid_index=1,
- rewrite_src_addr='a2::')
-
- def test_SRv6_End_AS_L2_SRH(self):
- """ Test SRv6 End.AS behavior with L2 traffic and SRH rewrite.
- """
- self.run_SRv6_End_AS_L2(
- sid_list=['a1::a6', 'a2::', 'a3::'],
- test_sid_index=0,
- rewrite_src_addr='a1::')
-
- def run_SRv6_End_AS_L2(self, sid_list, test_sid_index, rewrite_src_addr):
- """ Run SRv6 End.AS test with L2 traffic.
- """
- self.rewrite_src_addr = rewrite_src_addr
- self.rewrite_sid_list = sid_list[test_sid_index + 1::]
-
- # send traffic to one destination interface
- # source and destination interfaces are IPv6 only
- self.setup_interfaces(ipv6=[True, False])
-
- # configure route to next segment
- route = VppIpRoute(self, sid_list[test_sid_index + 1], 128,
- [VppRoutePath(self.pg0.remote_ip6,
- self.pg0.sw_if_index)])
- route.add_vpp_config()
-
- # configure SRv6 localSID behavior
- cli_str = "sr localsid address " + sid_list[test_sid_index] \
- + " behavior end.as" \
- + " oif " + self.pg1.name \
- + " iif " + self.pg1.name \
- + " src " + self.rewrite_src_addr
- for s in self.rewrite_sid_list:
- cli_str += " next " + s
- self.vapi.cli(cli_str)
-
- # log the localsids
- self.logger.debug(self.vapi.cli("show sr localsid"))
-
- # send one packet per packet size
- count = len(self.pg_packet_sizes)
-
- # prepare L2 in SRv6 headers
- packet_header1 = self.create_packet_header_IPv6_SRH_L2(
- sidlist=sid_list[::-1],
- segleft=len(sid_list) - test_sid_index - 1,
- vlan=0)
-
- # generate packets (pg0->pg1)
- pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
- self.pg_packet_sizes, count)
-
- # send packets and verify received packets
- self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
- self.compare_rx_tx_packet_End_AS_L2_out)
-
- # log the localsid counters
- self.logger.info(self.vapi.cli("show sr localsid"))
-
- # prepare L2 header for returning packets
- packet_header2 = self.create_packet_header_L2()
-
- # generate returning packets (pg1->pg0)
- pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
- self.pg_packet_sizes, count)
-
- # send packets and verify received packets
- self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
- self.compare_rx_tx_packet_End_AS_L2_in)
-
- # log the localsid counters
- self.logger.info(self.vapi.cli("show sr localsid"))
-
- # remove SRv6 localSIDs
- self.vapi.cli("sr localsid del address " + sid_list[test_sid_index])
-
- # cleanup interfaces
- self.teardown_interfaces()
-
- def run_SRv6_End_AS_IPv6(self, sid_list, test_sid_index, rewrite_src_addr):
- """ Run SRv6 End.AS test with IPv6 traffic.
- """
- self.rewrite_src_addr = rewrite_src_addr
- self.rewrite_sid_list = sid_list[test_sid_index + 1::]
-
- # send traffic to one destination interface
- # source and destination interfaces are IPv6 only
- self.setup_interfaces(ipv6=[True, True])
-
- # configure route to next segment
- route = VppIpRoute(self, sid_list[test_sid_index + 1], 128,
- [VppRoutePath(self.pg0.remote_ip6,
- self.pg0.sw_if_index)])
- route.add_vpp_config()
-
- # configure SRv6 localSID behavior
- cli_str = "sr localsid address " + sid_list[test_sid_index] \
- + " behavior end.as" \
- + " nh " + self.pg1.remote_ip6 \
- + " oif " + self.pg1.name \
- + " iif " + self.pg1.name \
- + " src " + self.rewrite_src_addr
- for s in self.rewrite_sid_list:
- cli_str += " next " + s
- self.vapi.cli(cli_str)
-
- # log the localsids
- self.logger.debug(self.vapi.cli("show sr localsid"))
-
- # send one packet per packet size
- count = len(self.pg_packet_sizes)
-
- # prepare IPv6 in SRv6 headers
- packet_header1 = self.create_packet_header_IPv6_SRH_IPv6(
- sidlist=sid_list[::-1],
- segleft=len(sid_list) - test_sid_index - 1)
-
- # generate packets (pg0->pg1)
- pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
- self.pg_packet_sizes, count)
-
- # send packets and verify received packets
- self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
- self.compare_rx_tx_packet_End_AS_IPv6_out)
-
- # log the localsid counters
- self.logger.info(self.vapi.cli("show sr localsid"))
-
- # prepare IPv6 header for returning packets
- packet_header2 = self.create_packet_header_IPv6()
-
- # generate returning packets (pg1->pg0)
- pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
- self.pg_packet_sizes, count)
-
- # send packets and verify received packets
- self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
- self.compare_rx_tx_packet_End_AS_IPv6_in)
-
- # log the localsid counters
- self.logger.info(self.vapi.cli("show sr localsid"))
-
- # remove SRv6 localSIDs
- self.vapi.cli("sr localsid del address " + sid_list[test_sid_index])
-
- # cleanup interfaces
- self.teardown_interfaces()
-
- def run_SRv6_End_AS_IPv4(self, sid_list, test_sid_index, rewrite_src_addr):
- """ Run SRv6 End.AS test with IPv4 traffic.
- """
- self.rewrite_src_addr = rewrite_src_addr
- self.rewrite_sid_list = sid_list[test_sid_index + 1::]
-
- # send traffic to one destination interface
- # source and destination interfaces are IPv6 only
- self.setup_interfaces(ipv6=[True, False], ipv4=[True, True])
-
- # configure route to next segment
- route = VppIpRoute(self, sid_list[test_sid_index + 1], 128,
- [VppRoutePath(self.pg0.remote_ip6,
- self.pg0.sw_if_index)])
- route.add_vpp_config()
-
- # configure SRv6 localSID behavior
- cli_str = "sr localsid address " + sid_list[test_sid_index] \
- + " behavior end.as" \
- + " nh " + self.pg1.remote_ip4 \
- + " oif " + self.pg1.name \
- + " iif " + self.pg1.name \
- + " src " + self.rewrite_src_addr
- for s in self.rewrite_sid_list:
- cli_str += " next " + s
- self.vapi.cli(cli_str)
-
- # log the localsids
- self.logger.debug(self.vapi.cli("show sr localsid"))
-
- # send one packet per packet size
- count = len(self.pg_packet_sizes)
-
- # prepare IPv4 in SRv6 headers
- packet_header1 = self.create_packet_header_IPv6_SRH_IPv4(
- sidlist=sid_list[::-1],
- segleft=len(sid_list) - test_sid_index - 1)
-
- # generate packets (pg0->pg1)
- pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
- self.pg_packet_sizes, count)
-
- # send packets and verify received packets
- self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
- self.compare_rx_tx_packet_End_AS_IPv4_out)
-
- # log the localsid counters
- self.logger.info(self.vapi.cli("show sr localsid"))
-
- # prepare IPv6 header for returning packets
- packet_header2 = self.create_packet_header_IPv4()
-
- # generate returning packets (pg1->pg0)
- pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
- self.pg_packet_sizes, count)
-
- # send packets and verify received packets
- self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
- self.compare_rx_tx_packet_End_AS_IPv4_in)
-
- # log the localsid counters
- self.logger.info(self.vapi.cli("show sr localsid"))
-
- # remove SRv6 localSIDs
- self.vapi.cli("sr localsid del address " + sid_list[test_sid_index])
-
- # cleanup interfaces
- self.teardown_interfaces()
-
- def compare_rx_tx_packet_End_AS_IPv6_in(self, tx_pkt, rx_pkt):
- """ Compare input and output packet after passing End.AS
-
- :param tx_pkt: transmitted packet
- :param rx_pkt: received packet
- """
-
- # get first (outer) IPv6 header of rx'ed packet
- rx_ip = rx_pkt.getlayer(IPv6)
- rx_srh = None
-
- tx_ip = tx_pkt.getlayer(IPv6)
-
- # expected segment-list (SRH order)
- tx_seglist = self.rewrite_sid_list[::-1]
-
- # received ip.src should be equal to SR Policy source
- self.assertEqual(rx_ip.src, self.rewrite_src_addr)
- # received ip.dst should be equal to expected sidlist[lastentry]
- self.assertEqual(rx_ip.dst, tx_seglist[-1])
-
- if len(tx_seglist) > 1:
- # rx'ed packet should have SRH
- self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
- # get SRH
- rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
- # rx'ed seglist should be equal to expected seglist
- self.assertEqual(rx_srh.addresses, tx_seglist)
- # segleft should be equal to size expected seglist-1
- self.assertEqual(rx_srh.segleft, len(tx_seglist)-1)
- # segleft should be equal to lastentry
- self.assertEqual(rx_srh.segleft, rx_srh.lastentry)
- # get payload
- payload = rx_srh.payload
- else:
- # rx'ed packet should NOT have SRH
- self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
- # get payload
- payload = rx_ip.payload
-
- # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
- # except for the hop-limit field
- # -> update tx'ed hlim to the expected hlim
- tx_ip.hlim = tx_ip.hlim - 1
-
- self.assertEqual(payload, tx_ip)
-
- self.logger.debug("packet verification: SUCCESS")
-
- def compare_rx_tx_packet_End_AS_IPv4_in(self, tx_pkt, rx_pkt):
- """ Compare input and output packet after passing End.AS
-
- :param tx_pkt: transmitted packet
- :param rx_pkt: received packet
- """
-
- # get first (outer) IPv6 header of rx'ed packet
- rx_ip = rx_pkt.getlayer(IPv6)
- rx_srh = None
-
- tx_ip = tx_pkt.getlayer(IP)
-
- # expected segment-list (SRH order)
- tx_seglist = self.rewrite_sid_list[::-1]
-
- # received ip.src should be equal to SR Policy source
- self.assertEqual(rx_ip.src, self.rewrite_src_addr)
- # received ip.dst should be equal to expected sidlist[lastentry]
- self.assertEqual(rx_ip.dst, tx_seglist[-1])
-
- if len(tx_seglist) > 1:
- # rx'ed packet should have SRH and IPv4 header
- self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
- self.assertTrue(rx_ip.payload.haslayer(IP))
- # get SRH
- rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
- # rx'ed seglist should be equal to seglist
- self.assertEqual(rx_srh.addresses, tx_seglist)
- # segleft should be equal to size seglist-1
- self.assertEqual(rx_srh.segleft, len(tx_seglist)-1)
- # segleft should be equal to lastentry
- self.assertEqual(rx_srh.segleft, rx_srh.lastentry)
- payload = rx_srh.payload
- else:
- # rx'ed packet should NOT have SRH
- self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
- # get payload
- payload = rx_ip.payload
-
- # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
- # except for the ttl field and ip checksum
- # -> adjust tx'ed ttl to expected ttl
- tx_ip.ttl = tx_ip.ttl - 1
- # -> set tx'ed ip checksum to None and let scapy recompute
- tx_ip.chksum = None
- # read back the pkt (with str()) to force computing these fields
- # probably other ways to accomplish this are possible
- tx_ip = IP(scapy.compat.raw(tx_ip))
-
- self.assertEqual(payload, tx_ip)
-
- self.logger.debug("packet verification: SUCCESS")
-
- def compare_rx_tx_packet_End_AS_L2_in(self, tx_pkt, rx_pkt):
- """ Compare input and output packet after passing End.AS
-
- :param tx_pkt: transmitted packet
- :param rx_pkt: received packet
- """
-
- # get first (outer) IPv6 header of rx'ed packet
- rx_ip = rx_pkt.getlayer(IPv6)
- rx_srh = None
-
- tx_ether = tx_pkt.getlayer(Ether)
-
- # expected segment-list (SRH order)
- tx_seglist = self.rewrite_sid_list[::-1]
-
- # received ip.src should be equal to SR Policy source
- self.assertEqual(rx_ip.src, self.rewrite_src_addr)
- # received ip.dst should be equal to expected sidlist[lastentry]
- self.assertEqual(rx_ip.dst, tx_seglist[-1])
-
- if len(tx_seglist) > 1:
- # rx'ed packet should have SRH
- self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
- # get SRH
- rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
- # rx'ed seglist should be equal to 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)
- # get payload
- payload = rx_srh.payload
- else:
- # rx'ed packet should NOT have SRH
- self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
- # get payload
- payload = rx_ip.payload
-
- # the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
- self.assertEqual(Ether(scapy.compat.raw(payload)), tx_ether)
-
- self.logger.debug("packet verification: SUCCESS")
-
- def compare_rx_tx_packet_End_AS_IPv6_out(self, tx_pkt, rx_pkt):
- """ Compare input and output packet after passing End.AS with IPv6
-
- :param tx_pkt: transmitted packet
- :param rx_pkt: received packet
- """
-
- # get first (outer) IPv6 header of rx'ed packet
- rx_ip = rx_pkt.getlayer(IPv6)
-
- tx_ip = tx_pkt.getlayer(IPv6)
- tx_ip2 = tx_pkt.getlayer(IPv6, 2)
-
- # verify if rx'ed packet has no SRH
- self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
-
- # the whole rx_ip pkt should be equal to tx_ip2
- # except for the hlim field
- # -> adjust tx'ed hlim to expected hlim
- tx_ip2.hlim = tx_ip2.hlim - 1
-
- self.assertEqual(rx_ip, tx_ip2)
-
- self.logger.debug("packet verification: SUCCESS")
-
- def compare_rx_tx_packet_End_AS_IPv4_out(self, tx_pkt, rx_pkt):
- """ Compare input and output packet after passing End.AS with IPv4
-
- :param tx_pkt: transmitted packet
- :param rx_pkt: received packet
- """
-
- # get IPv4 header of rx'ed packet
- rx_ip = rx_pkt.getlayer(IP)
-
- tx_ip = tx_pkt.getlayer(IPv6)
- tx_ip2 = tx_pkt.getlayer(IP)
-
- # verify if rx'ed packet has no SRH
- self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
-
- # the whole rx_ip pkt should be equal to tx_ip2
- # except for the ttl field and ip checksum
- # -> adjust tx'ed ttl to expected ttl
- tx_ip2.ttl = tx_ip2.ttl - 1
- # -> set tx'ed ip checksum to None and let scapy recompute
- tx_ip2.chksum = None
- # read back the pkt (with str()) to force computing these fields
- # probably other ways to accomplish this are possible
- tx_ip2 = IP(scapy.compat.raw(tx_ip2))
-
- self.assertEqual(rx_ip, tx_ip2)
-
- self.logger.debug("packet verification: SUCCESS")
-
- def compare_rx_tx_packet_End_AS_L2_out(self, tx_pkt, rx_pkt):
- """ Compare input and output packet after passing End.AS with L2
-
- :param tx_pkt: transmitted packet
- :param rx_pkt: received packet
- """
-
- # 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(scapy.compat.raw(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(scapy.compat.raw(p))
- payload_info.data = p.copy()
- self.logger.debug(ppp("Created packet:", p))
- pkts.append(p)
- self.logger.info("Done creating packets")
- return pkts
-
- def send_and_verify_pkts(self, input, pkts, output, compare_func):
- """Send packets and verify received packets using compare_func
-
- :param input: ingress interface of DUT
- :param pkts: list of packets to transmit
- :param output: egress interface of DUT
- :param compare_func: function to compare in and out packets
- """
- # add traffic stream to input interface
- input.add_stream(pkts)
-
- # enable capture on all interfaces
- self.pg_enable_capture(self.pg_interfaces)
-
- # start traffic
- self.logger.info("Starting traffic")
- self.pg_start()
-
- # get output capture
- self.logger.info("Getting packet capture")
- capture = output.get_capture()
-
- # assert nothing was captured on input interface
- # input.assert_nothing_captured()
-
- # verify captured packets
- self.verify_captured_pkts(output, capture, compare_func)
-
- def create_packet_header_IPv6(self):
- """Create packet header: IPv6 header, UDP header
-
- :param dst: IPv6 destination address
-
- IPv6 source address is 1234::1
- IPv6 destination address is 4321::1
- UDP source port and destination port are 1234
- """
-
- p = (IPv6(src='1234::1', dst='4321::1') /
- UDP(sport=1234, dport=1234))
- return p
-
- def create_packet_header_IPv6_SRH_IPv6(self, sidlist, segleft):
- """Create packet header: IPv6 encapsulated in SRv6:
- IPv6 header with SRH, IPv6 header, UDP header
-
- :param list sidlist: segment list of outer IPv6 SRH
- :param int segleft: segments-left field of outer IPv6 SRH
-
- Outer IPv6 source address is set to 5678::1
- Outer IPv6 destination address is set to sidlist[segleft]
- IPv6 source addresses is 1234::1
- IPv6 destination address is 4321::1
- UDP source port and destination port are 1234
- """
-
- p = (IPv6(src='5678::1', dst=sidlist[segleft]) /
- IPv6ExtHdrSegmentRouting(addresses=sidlist,
- segleft=segleft, nh=41) /
- IPv6(src='1234::1', dst='4321::1') /
- UDP(sport=1234, dport=1234))
- return p
-
- def create_packet_header_IPv4(self):
- """Create packet header: IPv4 header, UDP header
-
- :param dst: IPv4 destination address
-
- IPv4 source address is 123.1.1.1
- IPv4 destination address is 124.1.1.1
- UDP source port and destination port are 1234
- """
-
- p = (IP(src='123.1.1.1', dst='124.1.1.1') /
- UDP(sport=1234, dport=1234))
- return p
-
- def create_packet_header_IPv6_SRH_IPv4(self, sidlist, segleft):
- """Create packet header: IPv4 encapsulated in SRv6:
- IPv6 header with SRH, IPv4 header, UDP header
-
- :param ipv4address dst: inner IPv4 destination address
- :param list sidlist: segment list of outer IPv6 SRH
- :param int segleft: segments-left field of outer IPv6 SRH
-
- Outer IPv6 destination address is set to sidlist[segleft]
- IPv6 source address is 1234::1
- IPv4 source address is 123.1.1.1
- IPv4 destination address is 124.1.1.1
- UDP source port and destination port are 1234
- """
-
- p = (IPv6(src='1234::1', dst=sidlist[segleft]) /
- IPv6ExtHdrSegmentRouting(addresses=sidlist,
- segleft=segleft, nh=4) /
- IP(src='123.1.1.1', dst='124.1.1.1') /
- UDP(sport=1234, dport=1234))
- return p
-
- def 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 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(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(
- Ether(scapy.compat.raw(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.__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:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
-
- # have all expected packets arrived?
- for i in self.pg_interfaces:
- remaining_packet = self.get_next_packet_info_for_interface2(
- i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
- self.assertTrue(remaining_packet is None,
- "Interface %s: Packet expected from interface %s "
- "didn't arrive" % (dst_if.name, i.name))
-
-
-if __name__ == '__main__':
- unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff