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vpp/test/test_dslite.py
Klement Sekera d9b0c6fbf7 tests: replace pycodestyle with black 
Drop pycodestyle for code style checking in favor of black. Black is
much faster, stable PEP8 compliant code style checker offering also
automatic formatting. It aims to be very stable and produce smallest
diffs. It's used by many small and big projects.

Running checkstyle with black takes a few seconds with a terse output.
Thus, test-checkstyle-diff is no longer necessary.

Expand scope of checkstyle to all python files in the repo, replacing
test-checkstyle with checkstyle-python.

Also, fixstyle-python is now available for automatic style formatting.

Note: python virtualenv has been consolidated in test/Makefile,
test/requirements*.txt which will eventually be moved to a central
location.  This is required to simply the automated generation of
docker executor images in the CI.

Type: improvement
Change-Id: I022a326603485f58585e879ac0f697fceefbc9c8
Signed-off-by: Klement Sekera <klement.sekera@gmail.com>
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
2022-05-10 18:52:08 +00:00

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#!/usr/bin/env python3
import socket
import unittest
import struct
import random
from framework import tag_fixme_vpp_workers
from framework import VppTestCase, VppTestRunner
import scapy.compat
from scapy.layers.inet import IP, TCP, UDP, ICMP
from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror
from scapy.layers.inet6 import (
IPv6,
ICMPv6EchoRequest,
ICMPv6EchoReply,
ICMPv6ND_NS,
ICMPv6ND_NA,
ICMPv6NDOptDstLLAddr,
fragment6,
)
from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6, IPv6ExtHdrFragment
from scapy.layers.l2 import Ether, ARP, GRE
from scapy.data import IP_PROTOS
from scapy.packet import bind_layers, Raw
from util import ppp
from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder
from time import sleep
from util import ip4_range
from vpp_papi import mac_pton
from syslog_rfc5424_parser import SyslogMessage, ParseError
from syslog_rfc5424_parser.constants import SyslogFacility, SyslogSeverity
from io import BytesIO
from vpp_papi import VppEnum
from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathType
from vpp_neighbor import VppNeighbor
from scapy.all import (
bind_layers,
Packet,
ByteEnumField,
ShortField,
IPField,
IntField,
LongField,
XByteField,
FlagsField,
FieldLenField,
PacketListField,
)
from ipaddress import IPv6Network
@tag_fixme_vpp_workers
class TestDSlite(VppTestCase):
"""DS-Lite Test Cases"""
@classmethod
def setUpClass(cls):
super(TestDSlite, cls).setUpClass()
try:
cls.nat_addr = "10.0.0.3"
cls.create_pg_interfaces(range(3))
cls.pg0.admin_up()
cls.pg0.config_ip4()
cls.pg0.resolve_arp()
cls.pg1.admin_up()
cls.pg1.config_ip6()
cls.pg1.generate_remote_hosts(2)
cls.pg1.configure_ipv6_neighbors()
cls.pg2.admin_up()
cls.pg2.config_ip4()
cls.pg2.resolve_arp()
except Exception:
super(TestDSlite, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestDSlite, cls).tearDownClass()
def verify_syslog_apmadd(self, data, isaddr, isport, xsaddr, xsport, sv6enc, proto):
message = data.decode("utf-8")
try:
message = SyslogMessage.parse(message)
except ParseError as e:
self.logger.error(e)
else:
self.assertEqual(message.severity, SyslogSeverity.info)
self.assertEqual(message.appname, "NAT")
self.assertEqual(message.msgid, "APMADD")
sd_params = message.sd.get("napmap")
self.assertTrue(sd_params is not None)
self.assertEqual(sd_params.get("IATYP"), "IPv4")
self.assertEqual(sd_params.get("ISADDR"), isaddr)
self.assertEqual(sd_params.get("ISPORT"), "%d" % isport)
self.assertEqual(sd_params.get("XATYP"), "IPv4")
self.assertEqual(sd_params.get("XSADDR"), xsaddr)
self.assertEqual(sd_params.get("XSPORT"), "%d" % xsport)
self.assertEqual(sd_params.get("PROTO"), "%d" % proto)
self.assertTrue(sd_params.get("SSUBIX") is not None)
self.assertEqual(sd_params.get("SV6ENC"), sv6enc)
def test_dslite(self):
"""Test DS-Lite"""
self.vapi.dslite_add_del_pool_addr_range(
start_addr=self.nat_addr, end_addr=self.nat_addr, is_add=1
)
aftr_ip4 = "192.0.0.1"
aftr_ip6 = "2001:db8:85a3::8a2e:370:1"
self.vapi.dslite_set_aftr_addr(ip4_addr=aftr_ip4, ip6_addr=aftr_ip6)
self.vapi.syslog_set_sender(self.pg2.local_ip4, self.pg2.remote_ip4)
# UDP
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(dst=aftr_ip6, src=self.pg1.remote_hosts[0].ip6)
/ IP(dst=self.pg0.remote_ip4, src="192.168.1.1")
/ UDP(sport=20000, dport=10000)
)
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg0.get_capture(1)
capture = capture[0]
self.assertFalse(capture.haslayer(IPv6))
self.assertEqual(capture[IP].src, self.nat_addr)
self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
self.assertNotEqual(capture[UDP].sport, 20000)
self.assertEqual(capture[UDP].dport, 10000)
self.assert_packet_checksums_valid(capture)
out_port = capture[UDP].sport
capture = self.pg2.get_capture(1)
self.verify_syslog_apmadd(
capture[0][Raw].load,
"192.168.1.1",
20000,
self.nat_addr,
out_port,
self.pg1.remote_hosts[0].ip6,
IP_PROTOS.udp,
)
p = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IP(dst=self.nat_addr, src=self.pg0.remote_ip4)
/ UDP(sport=10000, dport=out_port)
)
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(1)
capture = capture[0]
self.assertEqual(capture[IPv6].src, aftr_ip6)
self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[0].ip6)
self.assertEqual(capture[IP].src, self.pg0.remote_ip4)
self.assertEqual(capture[IP].dst, "192.168.1.1")
self.assertEqual(capture[UDP].sport, 10000)
self.assertEqual(capture[UDP].dport, 20000)
self.assert_packet_checksums_valid(capture)
# TCP
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(dst=aftr_ip6, src=self.pg1.remote_hosts[1].ip6)
/ IP(dst=self.pg0.remote_ip4, src="192.168.1.1")
/ TCP(sport=20001, dport=10001)
)
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg0.get_capture(1)
capture = capture[0]
self.assertFalse(capture.haslayer(IPv6))
self.assertEqual(capture[IP].src, self.nat_addr)
self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
self.assertNotEqual(capture[TCP].sport, 20001)
self.assertEqual(capture[TCP].dport, 10001)
self.assert_packet_checksums_valid(capture)
out_port = capture[TCP].sport
p = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IP(dst=self.nat_addr, src=self.pg0.remote_ip4)
/ TCP(sport=10001, dport=out_port)
)
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(1)
capture = capture[0]
self.assertEqual(capture[IPv6].src, aftr_ip6)
self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[1].ip6)
self.assertEqual(capture[IP].src, self.pg0.remote_ip4)
self.assertEqual(capture[IP].dst, "192.168.1.1")
self.assertEqual(capture[TCP].sport, 10001)
self.assertEqual(capture[TCP].dport, 20001)
self.assert_packet_checksums_valid(capture)
# ICMP
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(dst=aftr_ip6, src=self.pg1.remote_hosts[1].ip6)
/ IP(dst=self.pg0.remote_ip4, src="192.168.1.1")
/ ICMP(id=4000, type="echo-request")
)
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg0.get_capture(1)
capture = capture[0]
self.assertFalse(capture.haslayer(IPv6))
self.assertEqual(capture[IP].src, self.nat_addr)
self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
self.assertNotEqual(capture[ICMP].id, 4000)
self.assert_packet_checksums_valid(capture)
out_id = capture[ICMP].id
p = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IP(dst=self.nat_addr, src=self.pg0.remote_ip4)
/ ICMP(id=out_id, type="echo-reply")
)
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(1)
capture = capture[0]
self.assertEqual(capture[IPv6].src, aftr_ip6)
self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[1].ip6)
self.assertEqual(capture[IP].src, self.pg0.remote_ip4)
self.assertEqual(capture[IP].dst, "192.168.1.1")
self.assertEqual(capture[ICMP].id, 4000)
self.assert_packet_checksums_valid(capture)
# ping DS-Lite AFTR tunnel endpoint address
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(src=self.pg1.remote_hosts[1].ip6, dst=aftr_ip6)
/ ICMPv6EchoRequest()
)
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(1)
capture = capture[0]
self.assertEqual(capture[IPv6].src, aftr_ip6)
self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[1].ip6)
self.assertTrue(capture.haslayer(ICMPv6EchoReply))
b4s = self.statistics.get_counter("/dslite/total-b4s")
self.assertEqual(b4s[0][0], 2)
sessions = self.statistics.get_counter("/dslite/total-sessions")
self.assertEqual(sessions[0][0], 3)
def tearDown(self):
super(TestDSlite, self).tearDown()
def show_commands_at_teardown(self):
self.logger.info(self.vapi.cli("show dslite pool"))
self.logger.info(self.vapi.cli("show dslite aftr-tunnel-endpoint-address"))
self.logger.info(self.vapi.cli("show dslite sessions"))
class TestDSliteCE(VppTestCase):
"""DS-Lite CE Test Cases"""
@classmethod
def setUpConstants(cls):
super(TestDSliteCE, cls).setUpConstants()
cls.vpp_cmdline.extend(["dslite", "{", "ce", "}"])
@classmethod
def setUpClass(cls):
super(TestDSliteCE, cls).setUpClass()
try:
cls.create_pg_interfaces(range(2))
cls.pg0.admin_up()
cls.pg0.config_ip4()
cls.pg0.resolve_arp()
cls.pg1.admin_up()
cls.pg1.config_ip6()
cls.pg1.generate_remote_hosts(1)
cls.pg1.configure_ipv6_neighbors()
except Exception:
super(TestDSliteCE, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestDSliteCE, cls).tearDownClass()
def test_dslite_ce(self):
"""Test DS-Lite CE"""
b4_ip4 = "192.0.0.2"
b4_ip6 = "2001:db8:62aa::375e:f4c1:1"
self.vapi.dslite_set_b4_addr(ip4_addr=b4_ip4, ip6_addr=b4_ip6)
aftr_ip4 = "192.0.0.1"
aftr_ip6 = "2001:db8:85a3::8a2e:370:1"
aftr_ip6_n = socket.inet_pton(socket.AF_INET6, aftr_ip6)
self.vapi.dslite_set_aftr_addr(ip4_addr=aftr_ip4, ip6_addr=aftr_ip6)
r1 = VppIpRoute(
self,
aftr_ip6,
128,
[VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index)],
)
r1.add_vpp_config()
# UDP encapsulation
p = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IP(dst=self.pg1.remote_ip4, src=self.pg0.remote_ip4)
/ UDP(sport=10000, dport=20000)
)
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(1)
capture = capture[0]
self.assertEqual(capture[IPv6].src, b4_ip6)
self.assertEqual(capture[IPv6].dst, aftr_ip6)
self.assertEqual(capture[IP].src, self.pg0.remote_ip4)
self.assertEqual(capture[IP].dst, self.pg1.remote_ip4)
self.assertEqual(capture[UDP].sport, 10000)
self.assertEqual(capture[UDP].dport, 20000)
self.assert_packet_checksums_valid(capture)
# UDP decapsulation
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(dst=b4_ip6, src=aftr_ip6)
/ IP(dst=self.pg0.remote_ip4, src=self.pg1.remote_ip4)
/ UDP(sport=20000, dport=10000)
)
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg0.get_capture(1)
capture = capture[0]
self.assertFalse(capture.haslayer(IPv6))
self.assertEqual(capture[IP].src, self.pg1.remote_ip4)
self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
self.assertEqual(capture[UDP].sport, 20000)
self.assertEqual(capture[UDP].dport, 10000)
self.assert_packet_checksums_valid(capture)
# ping DS-Lite B4 tunnel endpoint address
p = (
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
/ IPv6(src=self.pg1.remote_hosts[0].ip6, dst=b4_ip6)
/ ICMPv6EchoRequest()
)
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(1)
capture = capture[0]
self.assertEqual(capture[IPv6].src, b4_ip6)
self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[0].ip6)
self.assertTrue(capture.haslayer(ICMPv6EchoReply))
def tearDown(self):
super(TestDSliteCE, self).tearDown()
def show_commands_at_teardown(self):
self.logger.info(self.vapi.cli("show dslite aftr-tunnel-endpoint-address"))
self.logger.info(self.vapi.cli("show dslite b4-tunnel-endpoint-address"))
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