7f9b7f9f49
Continuation/Part 2 of https://gerrit.fd.io/r/#/c/17092/ Change-Id: Id0122d84eaf2c05d29e5be63a594d5e528ee7c9a Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
896 lines
33 KiB
Python
Executable File
896 lines
33 KiB
Python
Executable File
#!/usr/bin/env python
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import unittest
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import binascii
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from socket import AF_INET6
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from framework import VppTestCase, VppTestRunner
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from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto, VppIpTable
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from vpp_srv6 import SRv6LocalSIDBehaviors, VppSRv6LocalSID, VppSRv6Policy, \
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SRv6PolicyType, VppSRv6Steering, SRv6PolicySteeringTypes
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import scapy.compat
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from scapy.packet import Raw
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from scapy.layers.l2 import Ether, Dot1Q
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from scapy.layers.inet6 import IPv6, UDP, IPv6ExtHdrSegmentRouting
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from scapy.layers.inet import IP, UDP
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from scapy.utils import inet_pton, inet_ntop
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from util import ppp
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class TestSRv6(VppTestCase):
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""" SRv6 Static Proxy plugin Test Case """
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@classmethod
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def setUpClass(self):
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super(TestSRv6, self).setUpClass()
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@classmethod
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def tearDownClass(cls):
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super(TestSRv6, cls).tearDownClass()
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def setUp(self):
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""" Perform test setup before each test case.
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"""
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super(TestSRv6, self).setUp()
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# packet sizes, inclusive L2 overhead
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self.pg_packet_sizes = [64, 512, 1518, 9018]
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# reset packet_infos
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self.reset_packet_infos()
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def tearDown(self):
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""" Clean up test setup after each test case.
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"""
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self.teardown_interfaces()
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super(TestSRv6, self).tearDown()
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def configure_interface(self,
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interface,
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ipv6=False, ipv4=False,
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ipv6_table_id=0, ipv4_table_id=0):
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""" Configure interface.
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:param ipv6: configure IPv6 on interface
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:param ipv4: configure IPv4 on interface
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:param ipv6_table_id: FIB table_id for IPv6
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:param ipv4_table_id: FIB table_id for IPv4
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"""
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self.logger.debug("Configuring interface %s" % (interface.name))
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if ipv6:
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self.logger.debug("Configuring IPv6")
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interface.set_table_ip6(ipv6_table_id)
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interface.config_ip6()
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interface.resolve_ndp(timeout=5)
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if ipv4:
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self.logger.debug("Configuring IPv4")
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interface.set_table_ip4(ipv4_table_id)
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interface.config_ip4()
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interface.resolve_arp()
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interface.admin_up()
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def setup_interfaces(self, ipv6=[], ipv4=[],
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ipv6_table_id=[], ipv4_table_id=[]):
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""" Create and configure interfaces.
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:param ipv6: list of interface IPv6 capabilities
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:param ipv4: list of interface IPv4 capabilities
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:param ipv6_table_id: list of intf IPv6 FIB table_ids
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:param ipv4_table_id: list of intf IPv4 FIB table_ids
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:returns: List of created interfaces.
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"""
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# how many interfaces?
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if len(ipv6):
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count = len(ipv6)
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else:
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count = len(ipv4)
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self.logger.debug("Creating and configuring %d interfaces" % (count))
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# fill up ipv6 and ipv4 lists if needed
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# not enabled (False) is the default
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if len(ipv6) < count:
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ipv6 += (count - len(ipv6)) * [False]
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if len(ipv4) < count:
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ipv4 += (count - len(ipv4)) * [False]
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# fill up table_id lists if needed
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# table_id 0 (global) is the default
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if len(ipv6_table_id) < count:
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ipv6_table_id += (count - len(ipv6_table_id)) * [0]
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if len(ipv4_table_id) < count:
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ipv4_table_id += (count - len(ipv4_table_id)) * [0]
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# create 'count' pg interfaces
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self.create_pg_interfaces(range(count))
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# setup all interfaces
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for i in range(count):
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intf = self.pg_interfaces[i]
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self.configure_interface(intf,
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ipv6[i], ipv4[i],
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ipv6_table_id[i], ipv4_table_id[i])
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if any(ipv6):
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self.logger.debug(self.vapi.cli("show ip6 neighbors"))
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if any(ipv4):
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self.logger.debug(self.vapi.cli("show ip arp"))
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self.logger.debug(self.vapi.cli("show interface"))
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self.logger.debug(self.vapi.cli("show hardware"))
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return self.pg_interfaces
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def teardown_interfaces(self):
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""" Unconfigure and bring down interface.
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"""
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self.logger.debug("Tearing down interfaces")
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# tear down all interfaces
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# AFAIK they cannot be deleted
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for i in self.pg_interfaces:
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self.logger.debug("Tear down interface %s" % (i.name))
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i.admin_down()
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i.unconfig()
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i.set_table_ip4(0)
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i.set_table_ip6(0)
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def test_SRv6_End_AS_IPv6_noSRH(self):
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""" Test SRv6 End.AS behavior with IPv6 traffic and no SRH rewrite.
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"""
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self.run_SRv6_End_AS_IPv6(
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sid_list=['a1::', 'a2::a6', 'a3::'],
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test_sid_index=1,
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rewrite_src_addr='a2::')
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def test_SRv6_End_AS_IPv6_SRH(self):
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""" Test SRv6 End.AS behavior with IPv6 traffic and SRH rewrite.
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"""
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self.run_SRv6_End_AS_IPv6(
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sid_list=['a1::a6', 'a2::', 'a3::'],
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test_sid_index=0,
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rewrite_src_addr='a1::')
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def test_SRv6_End_AS_IPv4_noSRH(self):
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""" Test SRv6 End.AS behavior with IPv4 traffic and no SRH rewrite.
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"""
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self.run_SRv6_End_AS_IPv4(
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sid_list=['a1::', 'a2::a6', 'a3::'],
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test_sid_index=1,
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rewrite_src_addr='a2::')
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def test_SRv6_End_AS_IPv4_SRH(self):
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""" Test SRv6 End.AS behavior with IPv4 traffic and SRH rewrite.
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"""
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self.run_SRv6_End_AS_IPv4(
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sid_list=['a1::a6', 'a2::', 'a3::'],
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test_sid_index=0,
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rewrite_src_addr='a1::')
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def test_SRv6_End_AS_L2_noSRH(self):
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""" Test SRv6 End.AS behavior with L2 traffic and no SRH rewrite.
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"""
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self.run_SRv6_End_AS_L2(
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sid_list=['a1::', 'a2::a6', 'a3::'],
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test_sid_index=1,
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rewrite_src_addr='a2::')
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def test_SRv6_End_AS_L2_SRH(self):
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""" Test SRv6 End.AS behavior with L2 traffic and SRH rewrite.
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"""
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self.run_SRv6_End_AS_L2(
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sid_list=['a1::a6', 'a2::', 'a3::'],
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test_sid_index=0,
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rewrite_src_addr='a1::')
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def run_SRv6_End_AS_L2(self, sid_list, test_sid_index, rewrite_src_addr):
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""" Run SRv6 End.AS test with L2 traffic.
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"""
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self.rewrite_src_addr = rewrite_src_addr
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self.rewrite_sid_list = sid_list[test_sid_index + 1::]
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# send traffic to one destination interface
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# source and destination interfaces are IPv6 only
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self.setup_interfaces(ipv6=[True, False])
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# configure route to next segment
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route = VppIpRoute(self, sid_list[test_sid_index + 1], 128,
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[VppRoutePath(self.pg0.remote_ip6,
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self.pg0.sw_if_index,
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proto=DpoProto.DPO_PROTO_IP6)],
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is_ip6=1)
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route.add_vpp_config()
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# configure SRv6 localSID behavior
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cli_str = "sr localsid address " + sid_list[test_sid_index] \
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+ " behavior end.as" \
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+ " oif " + self.pg1.name \
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+ " iif " + self.pg1.name \
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+ " src " + self.rewrite_src_addr
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for s in self.rewrite_sid_list:
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cli_str += " next " + s
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self.vapi.cli(cli_str)
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# log the localsids
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self.logger.debug(self.vapi.cli("show sr localsid"))
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# send one packet per packet size
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count = len(self.pg_packet_sizes)
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# prepare L2 in SRv6 headers
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packet_header1 = self.create_packet_header_IPv6_SRH_L2(
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sidlist=sid_list[::-1],
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segleft=len(sid_list) - test_sid_index - 1,
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vlan=0)
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# generate packets (pg0->pg1)
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pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
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self.pg_packet_sizes, count)
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# send packets and verify received packets
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self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
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self.compare_rx_tx_packet_End_AS_L2_out)
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# log the localsid counters
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self.logger.info(self.vapi.cli("show sr localsid"))
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# prepare L2 header for returning packets
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packet_header2 = self.create_packet_header_L2()
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# generate returning packets (pg1->pg0)
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pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
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self.pg_packet_sizes, count)
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# send packets and verify received packets
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self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
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self.compare_rx_tx_packet_End_AS_L2_in)
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# log the localsid counters
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self.logger.info(self.vapi.cli("show sr localsid"))
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# remove SRv6 localSIDs
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self.vapi.cli("sr localsid del address " + sid_list[test_sid_index])
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# cleanup interfaces
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self.teardown_interfaces()
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def run_SRv6_End_AS_IPv6(self, sid_list, test_sid_index, rewrite_src_addr):
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""" Run SRv6 End.AS test with IPv6 traffic.
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"""
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self.rewrite_src_addr = rewrite_src_addr
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self.rewrite_sid_list = sid_list[test_sid_index + 1::]
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# send traffic to one destination interface
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# source and destination interfaces are IPv6 only
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self.setup_interfaces(ipv6=[True, True])
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# configure route to next segment
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route = VppIpRoute(self, sid_list[test_sid_index + 1], 128,
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[VppRoutePath(self.pg0.remote_ip6,
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self.pg0.sw_if_index,
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proto=DpoProto.DPO_PROTO_IP6)],
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is_ip6=1)
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route.add_vpp_config()
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# configure SRv6 localSID behavior
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cli_str = "sr localsid address " + sid_list[test_sid_index] \
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+ " behavior end.as" \
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+ " nh " + self.pg1.remote_ip6 \
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+ " oif " + self.pg1.name \
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+ " iif " + self.pg1.name \
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+ " src " + self.rewrite_src_addr
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for s in self.rewrite_sid_list:
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cli_str += " next " + s
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self.vapi.cli(cli_str)
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# log the localsids
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self.logger.debug(self.vapi.cli("show sr localsid"))
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# send one packet per packet size
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count = len(self.pg_packet_sizes)
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# prepare IPv6 in SRv6 headers
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packet_header1 = self.create_packet_header_IPv6_SRH_IPv6(
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sidlist=sid_list[::-1],
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segleft=len(sid_list) - test_sid_index - 1)
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# generate packets (pg0->pg1)
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pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
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self.pg_packet_sizes, count)
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# send packets and verify received packets
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self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
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self.compare_rx_tx_packet_End_AS_IPv6_out)
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# log the localsid counters
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self.logger.info(self.vapi.cli("show sr localsid"))
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# prepare IPv6 header for returning packets
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packet_header2 = self.create_packet_header_IPv6()
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# generate returning packets (pg1->pg0)
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pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
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self.pg_packet_sizes, count)
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# send packets and verify received packets
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self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
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self.compare_rx_tx_packet_End_AS_IPv6_in)
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# log the localsid counters
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self.logger.info(self.vapi.cli("show sr localsid"))
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# remove SRv6 localSIDs
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self.vapi.cli("sr localsid del address " + sid_list[test_sid_index])
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# cleanup interfaces
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self.teardown_interfaces()
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def run_SRv6_End_AS_IPv4(self, sid_list, test_sid_index, rewrite_src_addr):
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""" Run SRv6 End.AS test with IPv4 traffic.
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"""
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self.rewrite_src_addr = rewrite_src_addr
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self.rewrite_sid_list = sid_list[test_sid_index + 1::]
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# send traffic to one destination interface
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# source and destination interfaces are IPv6 only
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self.setup_interfaces(ipv6=[True, False], ipv4=[True, True])
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# configure route to next segment
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route = VppIpRoute(self, sid_list[test_sid_index + 1], 128,
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[VppRoutePath(self.pg0.remote_ip6,
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self.pg0.sw_if_index,
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proto=DpoProto.DPO_PROTO_IP6)],
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is_ip6=1)
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route.add_vpp_config()
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# configure SRv6 localSID behavior
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cli_str = "sr localsid address " + sid_list[test_sid_index] \
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+ " behavior end.as" \
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+ " nh " + self.pg1.remote_ip4 \
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+ " oif " + self.pg1.name \
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+ " iif " + self.pg1.name \
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+ " src " + self.rewrite_src_addr
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for s in self.rewrite_sid_list:
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cli_str += " next " + s
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self.vapi.cli(cli_str)
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# log the localsids
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self.logger.debug(self.vapi.cli("show sr localsid"))
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# send one packet per packet size
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count = len(self.pg_packet_sizes)
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# prepare IPv4 in SRv6 headers
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packet_header1 = self.create_packet_header_IPv6_SRH_IPv4(
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sidlist=sid_list[::-1],
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segleft=len(sid_list) - test_sid_index - 1)
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# generate packets (pg0->pg1)
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pkts1 = self.create_stream(self.pg0, self.pg1, packet_header1,
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self.pg_packet_sizes, count)
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# send packets and verify received packets
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self.send_and_verify_pkts(self.pg0, pkts1, self.pg1,
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self.compare_rx_tx_packet_End_AS_IPv4_out)
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# log the localsid counters
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self.logger.info(self.vapi.cli("show sr localsid"))
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# prepare IPv6 header for returning packets
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packet_header2 = self.create_packet_header_IPv4()
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# generate returning packets (pg1->pg0)
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pkts2 = self.create_stream(self.pg1, self.pg0, packet_header2,
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self.pg_packet_sizes, count)
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# send packets and verify received packets
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self.send_and_verify_pkts(self.pg1, pkts2, self.pg0,
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self.compare_rx_tx_packet_End_AS_IPv4_in)
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# log the localsid counters
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self.logger.info(self.vapi.cli("show sr localsid"))
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# remove SRv6 localSIDs
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self.vapi.cli("sr localsid del address " + sid_list[test_sid_index])
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# cleanup interfaces
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self.teardown_interfaces()
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def compare_rx_tx_packet_End_AS_IPv6_in(self, tx_pkt, rx_pkt):
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""" Compare input and output packet after passing End.AS
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:param tx_pkt: transmitted packet
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:param rx_pkt: received packet
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"""
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# get first (outer) IPv6 header of rx'ed packet
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rx_ip = rx_pkt.getlayer(IPv6)
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rx_srh = None
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tx_ip = tx_pkt.getlayer(IPv6)
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# expected segment-list (SRH order)
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tx_seglist = self.rewrite_sid_list[::-1]
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# received ip.src should be equal to SR Policy source
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self.assertEqual(rx_ip.src, self.rewrite_src_addr)
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# received ip.dst should be equal to expected sidlist[lastentry]
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self.assertEqual(rx_ip.dst, tx_seglist[-1])
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if len(tx_seglist) > 1:
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# rx'ed packet should have SRH
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self.assertTrue(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
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# get SRH
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rx_srh = rx_pkt.getlayer(IPv6ExtHdrSegmentRouting)
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# rx'ed seglist should be equal to expected seglist
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self.assertEqual(rx_srh.addresses, tx_seglist)
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# segleft should be equal to size expected seglist-1
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self.assertEqual(rx_srh.segleft, len(tx_seglist)-1)
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# segleft should be equal to lastentry
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self.assertEqual(rx_srh.segleft, rx_srh.lastentry)
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# get payload
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payload = rx_srh.payload
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else:
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# rx'ed packet should NOT have SRH
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self.assertFalse(rx_pkt.haslayer(IPv6ExtHdrSegmentRouting))
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# get payload
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payload = rx_ip.payload
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# the whole rx'ed pkt beyond SRH should be equal to tx'ed pkt
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# except for the hop-limit field
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# -> update tx'ed hlim to the expected hlim
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tx_ip.hlim = tx_ip.hlim - 1
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self.assertEqual(payload, tx_ip)
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self.logger.debug("packet verification: SUCCESS")
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def compare_rx_tx_packet_End_AS_IPv4_in(self, tx_pkt, rx_pkt):
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""" Compare input and output packet after passing End.AS
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:param tx_pkt: transmitted packet
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:param rx_pkt: received packet
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"""
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# get first (outer) IPv6 header of rx'ed packet
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|
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)
|