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authorFilip Varga <fivarga@cisco.com>2020-09-14 11:20:16 +0200
committerOle Tr�an <otroan@employees.org>2020-10-07 09:05:50 +0000
commit1f36023d29137825b8a09578d09b955046c2415b (patch)
treec00726718d9d8b4f5ecc74c45d9a2d790deb0250 /src/plugins/nat/test/test_nat64.py
parentd1762e614d1e05cbeda4d91e921fa663b2b46c03 (diff)
nat: move nat64 to a subfeature
Type: refactor Change-Id: I3b9e17164647d2019b1f40cffeed63393345219e Signed-off-by: Filip Varga <fivarga@cisco.com>
Diffstat (limited to 'src/plugins/nat/test/test_nat64.py')
-rw-r--r--src/plugins/nat/test/test_nat64.py1946
1 files changed, 1946 insertions, 0 deletions
diff --git a/src/plugins/nat/test/test_nat64.py b/src/plugins/nat/test/test_nat64.py
new file mode 100644
index 00000000000..6f88702d16a
--- /dev/null
+++ b/src/plugins/nat/test/test_nat64.py
@@ -0,0 +1,1946 @@
+#!/usr/bin/env python3
+
+import ipaddress
+import random
+import socket
+import struct
+import unittest
+from io import BytesIO
+from time import sleep
+
+import scapy.compat
+from framework import VppTestCase, VppTestRunner, running_extended_tests
+from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder
+from scapy.data import IP_PROTOS
+from scapy.layers.inet import IP, TCP, UDP, ICMP
+from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror
+from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6, IPv6ExtHdrFragment
+from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6EchoReply, \
+ ICMPv6ND_NS, ICMPv6ND_NA, ICMPv6NDOptDstLLAddr, fragment6
+from scapy.layers.l2 import Ether, GRE
+from scapy.packet import Raw
+from syslog_rfc5424_parser import SyslogMessage, ParseError
+from syslog_rfc5424_parser.constants import SyslogSeverity
+from util import ppc, ppp
+from vpp_papi import VppEnum
+
+
+class TestNAT64(VppTestCase):
+ """ NAT64 Test Cases """
+
+ @property
+ def SYSLOG_SEVERITY(self):
+ return VppEnum.vl_api_syslog_severity_t
+
+ @property
+ def config_flags(self):
+ return VppEnum.vl_api_nat_config_flags_t
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestNAT64, cls).setUpClass()
+
+ cls.tcp_port_in = 6303
+ cls.tcp_port_out = 6303
+ cls.udp_port_in = 6304
+ cls.udp_port_out = 6304
+ cls.icmp_id_in = 6305
+ cls.icmp_id_out = 6305
+ cls.tcp_external_port = 80
+ cls.nat_addr = '10.0.0.3'
+ cls.nat_addr_n = socket.inet_pton(socket.AF_INET, cls.nat_addr)
+ cls.vrf1_id = 10
+ cls.vrf1_nat_addr = '10.0.10.3'
+ cls.ipfix_src_port = 4739
+ cls.ipfix_domain_id = 1
+
+ cls.create_pg_interfaces(range(6))
+ cls.ip6_interfaces = list(cls.pg_interfaces[0:1])
+ cls.ip6_interfaces.append(cls.pg_interfaces[2])
+ cls.ip4_interfaces = list(cls.pg_interfaces[1:2])
+
+ cls.vapi.ip_table_add_del(is_add=1,
+ table={'table_id': cls.vrf1_id,
+ 'is_ip6': 1})
+
+ cls.pg_interfaces[2].set_table_ip6(cls.vrf1_id)
+
+ cls.pg0.generate_remote_hosts(2)
+
+ for i in cls.ip6_interfaces:
+ i.admin_up()
+ i.config_ip6()
+ i.configure_ipv6_neighbors()
+
+ for i in cls.ip4_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ cls.pg3.admin_up()
+ cls.pg3.config_ip4()
+ cls.pg3.resolve_arp()
+ cls.pg3.config_ip6()
+ cls.pg3.configure_ipv6_neighbors()
+
+ cls.pg5.admin_up()
+ cls.pg5.config_ip6()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestNAT64, cls).tearDownClass()
+
+ def setUp(self):
+ super(TestNAT64, self).setUp()
+ self.vapi.nat64_plugin_enable_disable(enable=1,
+ bib_buckets=128, st_buckets=256)
+
+ def tearDown(self):
+ super(TestNAT64, self).tearDown()
+ if not self.vpp_dead:
+ self.vapi.nat64_plugin_enable_disable(enable=0)
+
+ def show_commands_at_teardown(self):
+ self.logger.info(self.vapi.cli("show nat64 pool"))
+ self.logger.info(self.vapi.cli("show nat64 interfaces"))
+ self.logger.info(self.vapi.cli("show nat64 prefix"))
+ self.logger.info(self.vapi.cli("show nat64 bib all"))
+ self.logger.info(self.vapi.cli("show nat64 session table all"))
+
+ def create_stream_in_ip6(self, in_if, out_if, hlim=64, pref=None, plen=0):
+ """
+ Create IPv6 packet stream for inside network
+
+ :param in_if: Inside interface
+ :param out_if: Outside interface
+ :param ttl: Hop Limit of generated packets
+ :param pref: NAT64 prefix
+ :param plen: NAT64 prefix length
+ """
+ pkts = []
+ if pref is None:
+ dst = ''.join(['64:ff9b::', out_if.remote_ip4])
+ else:
+ dst = self.compose_ip6(out_if.remote_ip4, pref, plen)
+
+ # TCP
+ p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
+ IPv6(src=in_if.remote_ip6, dst=dst, hlim=hlim) /
+ TCP(sport=self.tcp_port_in, dport=20))
+ pkts.append(p)
+
+ # UDP
+ p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
+ IPv6(src=in_if.remote_ip6, dst=dst, hlim=hlim) /
+ UDP(sport=self.udp_port_in, dport=20))
+ pkts.append(p)
+
+ # ICMP
+ p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
+ IPv6(src=in_if.remote_ip6, dst=dst, hlim=hlim) /
+ ICMPv6EchoRequest(id=self.icmp_id_in))
+ pkts.append(p)
+
+ return pkts
+
+ def create_stream_out(self, out_if, dst_ip=None, ttl=64,
+ use_inside_ports=False):
+ """
+ Create packet stream for outside network
+
+ :param out_if: Outside interface
+ :param dst_ip: Destination IP address (Default use global NAT address)
+ :param ttl: TTL of generated packets
+ :param use_inside_ports: Use inside NAT ports as destination ports
+ instead of outside ports
+ """
+ if dst_ip is None:
+ dst_ip = self.nat_addr
+ if not use_inside_ports:
+ tcp_port = self.tcp_port_out
+ udp_port = self.udp_port_out
+ icmp_id = self.icmp_id_out
+ else:
+ tcp_port = self.tcp_port_in
+ udp_port = self.udp_port_in
+ icmp_id = self.icmp_id_in
+ pkts = []
+ # TCP
+ p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
+ IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
+ TCP(dport=tcp_port, sport=20))
+ pkts.extend([p, p])
+
+ # UDP
+ p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
+ IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
+ UDP(dport=udp_port, sport=20))
+ pkts.append(p)
+
+ # ICMP
+ p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
+ IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
+ ICMP(id=icmp_id, type='echo-reply'))
+ pkts.append(p)
+
+ return pkts
+
+ def verify_capture_out(self, capture, nat_ip=None, same_port=False,
+ dst_ip=None, is_ip6=False, ignore_port=False):
+ """
+ Verify captured packets on outside network
+
+ :param capture: Captured packets
+ :param nat_ip: Translated IP address (Default use global NAT address)
+ :param same_port: Source port number is not translated (Default False)
+ :param dst_ip: Destination IP address (Default do not verify)
+ :param is_ip6: If L3 protocol is IPv6 (Default False)
+ """
+ if is_ip6:
+ IP46 = IPv6
+ ICMP46 = ICMPv6EchoRequest
+ else:
+ IP46 = IP
+ ICMP46 = ICMP
+ if nat_ip is None:
+ nat_ip = self.nat_addr
+ for packet in capture:
+ try:
+ if not is_ip6:
+ self.assert_packet_checksums_valid(packet)
+ self.assertEqual(packet[IP46].src, nat_ip)
+ if dst_ip is not None:
+ self.assertEqual(packet[IP46].dst, dst_ip)
+ if packet.haslayer(TCP):
+ if not ignore_port:
+ if same_port:
+ self.assertEqual(
+ packet[TCP].sport, self.tcp_port_in)
+ else:
+ self.assertNotEqual(
+ packet[TCP].sport, self.tcp_port_in)
+ self.tcp_port_out = packet[TCP].sport
+ self.assert_packet_checksums_valid(packet)
+ elif packet.haslayer(UDP):
+ if not ignore_port:
+ if same_port:
+ self.assertEqual(
+ packet[UDP].sport, self.udp_port_in)
+ else:
+ self.assertNotEqual(
+ packet[UDP].sport, self.udp_port_in)
+ self.udp_port_out = packet[UDP].sport
+ else:
+ if not ignore_port:
+ if same_port:
+ self.assertEqual(
+ packet[ICMP46].id, self.icmp_id_in)
+ else:
+ self.assertNotEqual(
+ packet[ICMP46].id, self.icmp_id_in)
+ self.icmp_id_out = packet[ICMP46].id
+ self.assert_packet_checksums_valid(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(outside network):", packet))
+ raise
+
+ def verify_capture_in_ip6(self, capture, src_ip, dst_ip):
+ """
+ Verify captured IPv6 packets on inside network
+
+ :param capture: Captured packets
+ :param src_ip: Source IP
+ :param dst_ip: Destination IP address
+ """
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IPv6].src, src_ip)
+ self.assertEqual(packet[IPv6].dst, dst_ip)
+ self.assert_packet_checksums_valid(packet)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].dport, self.tcp_port_in)
+ elif packet.haslayer(UDP):
+ self.assertEqual(packet[UDP].dport, self.udp_port_in)
+ else:
+ self.assertEqual(packet[ICMPv6EchoReply].id,
+ self.icmp_id_in)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(inside network):", packet))
+ raise
+
+ def create_stream_frag(self, src_if, dst, sport, dport, data,
+ proto=IP_PROTOS.tcp, echo_reply=False):
+ """
+ Create fragmented packet stream
+
+ :param src_if: Source interface
+ :param dst: Destination IPv4 address
+ :param sport: Source port
+ :param dport: Destination port
+ :param data: Payload data
+ :param proto: protocol (TCP, UDP, ICMP)
+ :param echo_reply: use echo_reply if protocol is ICMP
+ :returns: Fragments
+ """
+ if proto == IP_PROTOS.tcp:
+ p = (IP(src=src_if.remote_ip4, dst=dst) /
+ TCP(sport=sport, dport=dport) /
+ Raw(data))
+ p = p.__class__(scapy.compat.raw(p))
+ chksum = p[TCP].chksum
+ proto_header = TCP(sport=sport, dport=dport, chksum=chksum)
+ elif proto == IP_PROTOS.udp:
+ proto_header = UDP(sport=sport, dport=dport)
+ elif proto == IP_PROTOS.icmp:
+ if not echo_reply:
+ proto_header = ICMP(id=sport, type='echo-request')
+ else:
+ proto_header = ICMP(id=sport, type='echo-reply')
+ else:
+ raise Exception("Unsupported protocol")
+ id = random.randint(0, 65535)
+ pkts = []
+ if proto == IP_PROTOS.tcp:
+ raw = Raw(data[0:4])
+ else:
+ raw = Raw(data[0:16])
+ p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
+ IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=0, id=id) /
+ proto_header /
+ raw)
+ pkts.append(p)
+ if proto == IP_PROTOS.tcp:
+ raw = Raw(data[4:20])
+ else:
+ raw = Raw(data[16:32])
+ p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
+ IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=3, id=id,
+ proto=proto) /
+ raw)
+ pkts.append(p)
+ if proto == IP_PROTOS.tcp:
+ raw = Raw(data[20:])
+ else:
+ raw = Raw(data[32:])
+ p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
+ IP(src=src_if.remote_ip4, dst=dst, frag=5, proto=proto,
+ id=id) /
+ raw)
+ pkts.append(p)
+ return pkts
+
+ def create_stream_frag_ip6(self, src_if, dst, sport, dport, data,
+ pref=None, plen=0, frag_size=128):
+ """
+ Create fragmented packet stream
+
+ :param src_if: Source interface
+ :param dst: Destination IPv4 address
+ :param sport: Source TCP port
+ :param dport: Destination TCP port
+ :param data: Payload data
+ :param pref: NAT64 prefix
+ :param plen: NAT64 prefix length
+ :param fragsize: size of fragments
+ :returns: Fragments
+ """
+ if pref is None:
+ dst_ip6 = ''.join(['64:ff9b::', dst])
+ else:
+ dst_ip6 = self.compose_ip6(dst, pref, plen)
+
+ p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
+ IPv6(src=src_if.remote_ip6, dst=dst_ip6) /
+ IPv6ExtHdrFragment(id=random.randint(0, 65535)) /
+ TCP(sport=sport, dport=dport) /
+ Raw(data))
+
+ return fragment6(p, frag_size)
+
+ def reass_frags_and_verify(self, frags, src, dst):
+ """
+ Reassemble and verify fragmented packet
+
+ :param frags: Captured fragments
+ :param src: Source IPv4 address to verify
+ :param dst: Destination IPv4 address to verify
+
+ :returns: Reassembled IPv4 packet
+ """
+ buffer = BytesIO()
+ for p in frags:
+ self.assertEqual(p[IP].src, src)
+ self.assertEqual(p[IP].dst, dst)
+ self.assert_ip_checksum_valid(p)
+ buffer.seek(p[IP].frag * 8)
+ buffer.write(bytes(p[IP].payload))
+ ip = IP(src=frags[0][IP].src, dst=frags[0][IP].dst,
+ proto=frags[0][IP].proto)
+ if ip.proto == IP_PROTOS.tcp:
+ p = (ip / TCP(buffer.getvalue()))
+ self.logger.debug(ppp("Reassembled:", p))
+ self.assert_tcp_checksum_valid(p)
+ elif ip.proto == IP_PROTOS.udp:
+ p = (ip / UDP(buffer.getvalue()[:8]) /
+ Raw(buffer.getvalue()[8:]))
+ elif ip.proto == IP_PROTOS.icmp:
+ p = (ip / ICMP(buffer.getvalue()))
+ return p
+
+ def reass_frags_and_verify_ip6(self, frags, src, dst):
+ """
+ Reassemble and verify fragmented packet
+
+ :param frags: Captured fragments
+ :param src: Source IPv6 address to verify
+ :param dst: Destination IPv6 address to verify
+
+ :returns: Reassembled IPv6 packet
+ """
+ buffer = BytesIO()
+ for p in frags:
+ self.assertEqual(p[IPv6].src, src)
+ self.assertEqual(p[IPv6].dst, dst)
+ buffer.seek(p[IPv6ExtHdrFragment].offset * 8)
+ buffer.write(bytes(p[IPv6ExtHdrFragment].payload))
+ ip = IPv6(src=frags[0][IPv6].src, dst=frags[0][IPv6].dst,
+ nh=frags[0][IPv6ExtHdrFragment].nh)
+ if ip.nh == IP_PROTOS.tcp:
+ p = (ip / TCP(buffer.getvalue()))
+ elif ip.nh == IP_PROTOS.udp:
+ p = (ip / UDP(buffer.getvalue()))
+ self.logger.debug(ppp("Reassembled:", p))
+ self.assert_packet_checksums_valid(p)
+ return p
+
+ # TODO: ipfix needs to be separated from NAT base plugin
+ @unittest.skipUnless(running_extended_tests, "part of extended tests")
+ def verify_ipfix_max_bibs(self, data, limit):
+ """
+ Verify IPFIX maximum BIB entries exceeded event
+
+ :param data: Decoded IPFIX data records
+ :param limit: Number of maximum BIB entries that can be created.
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ self.assertEqual(scapy.compat.orb(record[230]), 13)
+ # natQuotaExceededEvent
+ self.assertEqual(struct.pack("I", 2), record[466])
+ # maxBIBEntries
+ self.assertEqual(struct.pack("I", limit), record[472])
+
+ # TODO: ipfix needs to be separated from NAT base plugin
+ @unittest.skipUnless(running_extended_tests, "part of extended tests")
+ def verify_ipfix_bib(self, data, is_create, src_addr):
+ """
+ Verify IPFIX NAT64 BIB create and delete events
+
+ :param data: Decoded IPFIX data records
+ :param is_create: Create event if nonzero value otherwise delete event
+ :param src_addr: IPv6 source address
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ if is_create:
+ self.assertEqual(scapy.compat.orb(record[230]), 10)
+ else:
+ self.assertEqual(scapy.compat.orb(record[230]), 11)
+ # sourceIPv6Address
+ self.assertEqual(src_addr, str(ipaddress.IPv6Address(record[27])))
+ # postNATSourceIPv4Address
+ self.assertEqual(self.nat_addr_n, record[225])
+ # protocolIdentifier
+ self.assertEqual(IP_PROTOS.tcp, scapy.compat.orb(record[4]))
+ # ingressVRFID
+ self.assertEqual(struct.pack("!I", 0), record[234])
+ # sourceTransportPort
+ self.assertEqual(struct.pack("!H", self.tcp_port_in), record[7])
+ # postNAPTSourceTransportPort
+ self.assertEqual(struct.pack("!H", self.tcp_port_out), record[227])
+
+ # TODO: ipfix needs to be separated from NAT base plugin
+ @unittest.skipUnless(running_extended_tests, "part of extended tests")
+ def verify_ipfix_nat64_ses(self, data, is_create, src_addr, dst_addr,
+ dst_port):
+ """
+ Verify IPFIX NAT64 session create and delete events
+
+ :param data: Decoded IPFIX data records
+ :param is_create: Create event if nonzero value otherwise delete event
+ :param src_addr: IPv6 source address
+ :param dst_addr: IPv4 destination address
+ :param dst_port: destination TCP port
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ if is_create:
+ self.assertEqual(scapy.compat.orb(record[230]), 6)
+ else:
+ self.assertEqual(scapy.compat.orb(record[230]), 7)
+ # sourceIPv6Address
+ self.assertEqual(src_addr, str(ipaddress.IPv6Address(record[27])))
+ # destinationIPv6Address
+ self.assertEqual(socket.inet_pton(socket.AF_INET6,
+ self.compose_ip6(dst_addr,
+ '64:ff9b::',
+ 96)),
+ record[28])
+ # postNATSourceIPv4Address
+ self.assertEqual(self.nat_addr_n, record[225])
+ # postNATDestinationIPv4Address
+ self.assertEqual(socket.inet_pton(socket.AF_INET, dst_addr),
+ record[226])
+ # protocolIdentifier
+ self.assertEqual(IP_PROTOS.tcp, scapy.compat.orb(record[4]))
+ # ingressVRFID
+ self.assertEqual(struct.pack("!I", 0), record[234])
+ # sourceTransportPort
+ self.assertEqual(struct.pack("!H", self.tcp_port_in), record[7])
+ # postNAPTSourceTransportPort
+ self.assertEqual(struct.pack("!H", self.tcp_port_out), record[227])
+ # destinationTransportPort
+ self.assertEqual(struct.pack("!H", dst_port), record[11])
+ # postNAPTDestinationTransportPort
+ self.assertEqual(struct.pack("!H", dst_port), record[228])
+
+ def verify_syslog_sess(self, data, is_add=True, is_ip6=False):
+ message = data.decode('utf-8')
+ try:
+ message = SyslogMessage.parse(message)
+ except ParseError as e:
+ self.logger.error(e)
+ raise
+ else:
+ self.assertEqual(message.severity, SyslogSeverity.info)
+ self.assertEqual(message.appname, 'NAT')
+ self.assertEqual(message.msgid, 'SADD' if is_add else 'SDEL')
+ sd_params = message.sd.get('nsess')
+ self.assertTrue(sd_params is not None)
+ if is_ip6:
+ self.assertEqual(sd_params.get('IATYP'), 'IPv6')
+ self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip6)
+ else:
+ self.assertEqual(sd_params.get('IATYP'), 'IPv4')
+ self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4)
+ self.assertTrue(sd_params.get('SSUBIX') is not None)
+ self.assertEqual(sd_params.get('ISPORT'), "%d" % self.tcp_port_in)
+ self.assertEqual(sd_params.get('XATYP'), 'IPv4')
+ self.assertEqual(sd_params.get('XSADDR'), self.nat_addr)
+ self.assertEqual(sd_params.get('XSPORT'), "%d" % self.tcp_port_out)
+ self.assertEqual(sd_params.get('PROTO'), "%d" % IP_PROTOS.tcp)
+ self.assertEqual(sd_params.get('SVLAN'), '0')
+ self.assertEqual(sd_params.get('XDADDR'), self.pg1.remote_ip4)
+ self.assertEqual(sd_params.get('XDPORT'),
+ "%d" % self.tcp_external_port)
+
+ def compose_ip6(self, ip4, pref, plen):
+ """
+ Compose IPv4-embedded IPv6 addresses
+
+ :param ip4: IPv4 address
+ :param pref: IPv6 prefix
+ :param plen: IPv6 prefix length
+ :returns: IPv4-embedded IPv6 addresses
+ """
+ pref_n = list(socket.inet_pton(socket.AF_INET6, pref))
+ ip4_n = list(socket.inet_pton(socket.AF_INET, ip4))
+ if plen == 32:
+ pref_n[4] = ip4_n[0]
+ pref_n[5] = ip4_n[1]
+ pref_n[6] = ip4_n[2]
+ pref_n[7] = ip4_n[3]
+ elif plen == 40:
+ pref_n[5] = ip4_n[0]
+ pref_n[6] = ip4_n[1]
+ pref_n[7] = ip4_n[2]
+ pref_n[9] = ip4_n[3]
+ elif plen == 48:
+ pref_n[6] = ip4_n[0]
+ pref_n[7] = ip4_n[1]
+ pref_n[9] = ip4_n[2]
+ pref_n[10] = ip4_n[3]
+ elif plen == 56:
+ pref_n[7] = ip4_n[0]
+ pref_n[9] = ip4_n[1]
+ pref_n[10] = ip4_n[2]
+ pref_n[11] = ip4_n[3]
+ elif plen == 64:
+ pref_n[9] = ip4_n[0]
+ pref_n[10] = ip4_n[1]
+ pref_n[11] = ip4_n[2]
+ pref_n[12] = ip4_n[3]
+ elif plen == 96:
+ pref_n[12] = ip4_n[0]
+ pref_n[13] = ip4_n[1]
+ pref_n[14] = ip4_n[2]
+ pref_n[15] = ip4_n[3]
+ packed_pref_n = b''.join([scapy.compat.chb(x) for x in pref_n])
+ return socket.inet_ntop(socket.AF_INET6, packed_pref_n)
+
+ # TODO: ipfix needs to be separated from NAT base plugin
+ @unittest.skipUnless(running_extended_tests, "part of extended tests")
+ def verify_ipfix_max_sessions(self, data, limit):
+ """
+ Verify IPFIX maximum session entries exceeded event
+
+ :param data: Decoded IPFIX data records
+ :param limit: Number of maximum session entries that can be created.
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ self.assertEqual(scapy.compat.orb(record[230]), 13)
+ # natQuotaExceededEvent
+ self.assertEqual(struct.pack("I", 1), record[466])
+ # maxSessionEntries
+ self.assertEqual(struct.pack("I", limit), record[471])
+
+ def test_nat64_inside_interface_handles_neighbor_advertisement(self):
+ """ NAT64 inside interface handles Neighbor Advertisement """
+
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg5.sw_if_index)
+
+ # Try to send ping
+ ping = (Ether(dst=self.pg5.local_mac, src=self.pg5.remote_mac) /
+ IPv6(src=self.pg5.remote_ip6, dst=self.pg5.local_ip6) /
+ ICMPv6EchoRequest())
+ pkts = [ping]
+ self.pg5.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Wait for Neighbor Solicitation
+ capture = self.pg5.get_capture(len(pkts))
+ packet = capture[0]
+ try:
+ self.assertEqual(packet[IPv6].src, self.pg5.local_ip6)
+ self.assertEqual(packet.haslayer(ICMPv6ND_NS), 1)
+ tgt = packet[ICMPv6ND_NS].tgt
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # Send Neighbor Advertisement
+ p = (Ether(dst=self.pg5.local_mac, src=self.pg5.remote_mac) /
+ IPv6(src=self.pg5.remote_ip6, dst=self.pg5.local_ip6) /
+ ICMPv6ND_NA(tgt=tgt) /
+ ICMPv6NDOptDstLLAddr(lladdr=self.pg5.remote_mac))
+ pkts = [p]
+ self.pg5.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Try to send ping again
+ pkts = [ping]
+ self.pg5.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Wait for ping reply
+ capture = self.pg5.get_capture(len(pkts))
+ packet = capture[0]
+ try:
+ self.assertEqual(packet[IPv6].src, self.pg5.local_ip6)
+ self.assertEqual(packet[IPv6].dst, self.pg5.remote_ip6)
+ self.assertEqual(packet.haslayer(ICMPv6EchoReply), 1)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_pool(self):
+ """ Add/delete address to NAT64 pool """
+ nat_addr = '1.2.3.4'
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=nat_addr,
+ end_addr=nat_addr,
+ vrf_id=0xFFFFFFFF, is_add=1)
+
+ addresses = self.vapi.nat64_pool_addr_dump()
+ self.assertEqual(len(addresses), 1)
+ self.assertEqual(str(addresses[0].address), nat_addr)
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=nat_addr,
+ end_addr=nat_addr,
+ vrf_id=0xFFFFFFFF, is_add=0)
+
+ addresses = self.vapi.nat64_pool_addr_dump()
+ self.assertEqual(len(addresses), 0)
+
+ def test_interface(self):
+ """ Enable/disable NAT64 feature on the interface """
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ interfaces = self.vapi.nat64_interface_dump()
+ self.assertEqual(len(interfaces), 2)
+ pg0_found = False
+ pg1_found = False
+ for intf in interfaces:
+ if intf.sw_if_index == self.pg0.sw_if_index:
+ self.assertEqual(intf.flags, self.config_flags.NAT_IS_INSIDE)
+ pg0_found = True
+ elif intf.sw_if_index == self.pg1.sw_if_index:
+ self.assertEqual(intf.flags, self.config_flags.NAT_IS_OUTSIDE)
+ pg1_found = True
+ self.assertTrue(pg0_found)
+ self.assertTrue(pg1_found)
+
+ features = self.vapi.cli("show interface features pg0")
+ self.assertIn('nat64-in2out', features)
+ features = self.vapi.cli("show interface features pg1")
+ self.assertIn('nat64-out2in', features)
+
+ self.vapi.nat64_add_del_interface(is_add=0, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=0, flags=flags,
+ sw_if_index=self.pg1.sw_if_index)
+
+ interfaces = self.vapi.nat64_interface_dump()
+ self.assertEqual(len(interfaces), 0)
+
+ def test_static_bib(self):
+ """ Add/delete static BIB entry """
+ in_addr = '2001:db8:85a3::8a2e:370:7334'
+ out_addr = '10.1.1.3'
+ in_port = 1234
+ out_port = 5678
+ proto = IP_PROTOS.tcp
+
+ self.vapi.nat64_add_del_static_bib(i_addr=in_addr, o_addr=out_addr,
+ i_port=in_port, o_port=out_port,
+ proto=proto, vrf_id=0, is_add=1)
+ bib = self.vapi.nat64_bib_dump(proto=IP_PROTOS.tcp)
+ static_bib_num = 0
+ for bibe in bib:
+ if bibe.flags & self.config_flags.NAT_IS_STATIC:
+ static_bib_num += 1
+ self.assertEqual(str(bibe.i_addr), in_addr)
+ self.assertEqual(str(bibe.o_addr), out_addr)
+ self.assertEqual(bibe.i_port, in_port)
+ self.assertEqual(bibe.o_port, out_port)
+ self.assertEqual(static_bib_num, 1)
+ bibs = self.statistics.get_counter('/nat64/total-bibs')
+ self.assertEqual(bibs[0][0], 1)
+
+ self.vapi.nat64_add_del_static_bib(i_addr=in_addr, o_addr=out_addr,
+ i_port=in_port, o_port=out_port,
+ proto=proto, vrf_id=0, is_add=0)
+ bib = self.vapi.nat64_bib_dump(proto=IP_PROTOS.tcp)
+ static_bib_num = 0
+ for bibe in bib:
+ if bibe.flags & self.config_flags.NAT_IS_STATIC:
+ static_bib_num += 1
+ self.assertEqual(static_bib_num, 0)
+ bibs = self.statistics.get_counter('/nat64/total-bibs')
+ self.assertEqual(bibs[0][0], 0)
+
+ def test_set_timeouts(self):
+ """ Set NAT64 timeouts """
+ # verify default values
+ timeouts = self.vapi.nat64_get_timeouts()
+ self.assertEqual(timeouts.udp, 300)
+ self.assertEqual(timeouts.icmp, 60)
+ self.assertEqual(timeouts.tcp_transitory, 240)
+ self.assertEqual(timeouts.tcp_established, 7440)
+
+ # set and verify custom values
+ self.vapi.nat64_set_timeouts(udp=200, tcp_established=7450,
+ tcp_transitory=250, icmp=30)
+ timeouts = self.vapi.nat64_get_timeouts()
+ self.assertEqual(timeouts.udp, 200)
+ self.assertEqual(timeouts.icmp, 30)
+ self.assertEqual(timeouts.tcp_transitory, 250)
+ self.assertEqual(timeouts.tcp_established, 7450)
+
+ def test_dynamic(self):
+ """ NAT64 dynamic translation test """
+ self.tcp_port_in = 6303
+ self.udp_port_in = 6304
+ self.icmp_id_in = 6305
+
+ ses_num_start = self.nat64_get_ses_num()
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ # in2out
+ tcpn = self.statistics.get_counter('/nat64/in2out/tcp')[0]
+ udpn = self.statistics.get_counter('/nat64/in2out/udp')[0]
+ icmpn = self.statistics.get_counter('/nat64/in2out/icmp')[0]
+ drops = self.statistics.get_counter('/nat64/in2out/drops')[0]
+
+ pkts = self.create_stream_in_ip6(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.nat_addr,
+ dst_ip=self.pg1.remote_ip4)
+
+ if_idx = self.pg0.sw_if_index
+ cnt = self.statistics.get_counter('/nat64/in2out/tcp')[0]
+ self.assertEqual(cnt[if_idx] - tcpn[if_idx], 1)
+ cnt = self.statistics.get_counter('/nat64/in2out/udp')[0]
+ self.assertEqual(cnt[if_idx] - udpn[if_idx], 1)
+ cnt = self.statistics.get_counter('/nat64/in2out/icmp')[0]
+ self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1)
+ cnt = self.statistics.get_counter('/nat64/in2out/drops')[0]
+ self.assertEqual(cnt[if_idx] - drops[if_idx], 0)
+
+ # out2in
+ tcpn = self.statistics.get_counter('/nat64/out2in/tcp')[0]
+ udpn = self.statistics.get_counter('/nat64/out2in/udp')[0]
+ icmpn = self.statistics.get_counter('/nat64/out2in/icmp')[0]
+ drops = self.statistics.get_counter('/nat64/out2in/drops')[0]
+
+ pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4]))
+ self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6)
+
+ if_idx = self.pg1.sw_if_index
+ cnt = self.statistics.get_counter('/nat64/out2in/tcp')[0]
+ self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2)
+ cnt = self.statistics.get_counter('/nat64/out2in/udp')[0]
+ self.assertEqual(cnt[if_idx] - udpn[if_idx], 1)
+ cnt = self.statistics.get_counter('/nat64/out2in/icmp')[0]
+ self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1)
+ cnt = self.statistics.get_counter('/nat64/out2in/drops')[0]
+ self.assertEqual(cnt[if_idx] - drops[if_idx], 0)
+
+ bibs = self.statistics.get_counter('/nat64/total-bibs')
+ self.assertEqual(bibs[0][0], 3)
+ sessions = self.statistics.get_counter('/nat64/total-sessions')
+ self.assertEqual(sessions[0][0], 3)
+
+ # in2out
+ pkts = self.create_stream_in_ip6(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.nat_addr,
+ dst_ip=self.pg1.remote_ip4)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6)
+
+ ses_num_end = self.nat64_get_ses_num()
+
+ self.assertEqual(ses_num_end - ses_num_start, 3)
+
+ # tenant with specific VRF
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.vrf1_nat_addr,
+ end_addr=self.vrf1_nat_addr,
+ vrf_id=self.vrf1_id, is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg2.sw_if_index)
+
+ pkts = self.create_stream_in_ip6(self.pg2, self.pg1)
+ self.pg2.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.vrf1_nat_addr,
+ dst_ip=self.pg1.remote_ip4)
+
+ pkts = self.create_stream_out(self.pg1, dst_ip=self.vrf1_nat_addr)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg2.get_capture(len(pkts))
+ self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg2.remote_ip6)
+
+ def test_static(self):
+ """ NAT64 static translation test """
+ self.tcp_port_in = 60303
+ self.udp_port_in = 60304
+ self.icmp_id_in = 60305
+ self.tcp_port_out = 60303
+ self.udp_port_out = 60304
+ self.icmp_id_out = 60305
+
+ ses_num_start = self.nat64_get_ses_num()
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ self.vapi.nat64_add_del_static_bib(i_addr=self.pg0.remote_ip6,
+ o_addr=self.nat_addr,
+ i_port=self.tcp_port_in,
+ o_port=self.tcp_port_out,
+ proto=IP_PROTOS.tcp, vrf_id=0,
+ is_add=1)
+ self.vapi.nat64_add_del_static_bib(i_addr=self.pg0.remote_ip6,
+ o_addr=self.nat_addr,
+ i_port=self.udp_port_in,
+ o_port=self.udp_port_out,
+ proto=IP_PROTOS.udp, vrf_id=0,
+ is_add=1)
+ self.vapi.nat64_add_del_static_bib(i_addr=self.pg0.remote_ip6,
+ o_addr=self.nat_addr,
+ i_port=self.icmp_id_in,
+ o_port=self.icmp_id_out,
+ proto=IP_PROTOS.icmp, vrf_id=0,
+ is_add=1)
+
+ # in2out
+ pkts = self.create_stream_in_ip6(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.nat_addr,
+ dst_ip=self.pg1.remote_ip4, same_port=True)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4]))
+ self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6)
+
+ ses_num_end = self.nat64_get_ses_num()
+
+ self.assertEqual(ses_num_end - ses_num_start, 3)
+
+ @unittest.skipUnless(running_extended_tests, "part of extended tests")
+ def test_session_timeout(self):
+ """ NAT64 session timeout """
+ self.icmp_id_in = 1234
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+ self.vapi.nat64_set_timeouts(udp=300, tcp_established=5,
+ tcp_transitory=5,
+ icmp=5)
+
+ pkts = self.create_stream_in_ip6(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+
+ ses_num_before_timeout = self.nat64_get_ses_num()
+
+ sleep(15)
+
+ # ICMP and TCP session after timeout
+ ses_num_after_timeout = self.nat64_get_ses_num()
+ self.assertEqual(ses_num_before_timeout - ses_num_after_timeout, 2)
+
+ def test_icmp_error(self):
+ """ NAT64 ICMP Error message translation """
+ self.tcp_port_in = 6303
+ self.udp_port_in = 6304
+ self.icmp_id_in = 6305
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ # send some packets to create sessions
+ pkts = self.create_stream_in_ip6(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture_ip4 = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture_ip4,
+ nat_ip=self.nat_addr,
+ dst_ip=self.pg1.remote_ip4)
+
+ pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture_ip6 = self.pg0.get_capture(len(pkts))
+ ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4]))
+ self.verify_capture_in_ip6(capture_ip6, ip[IPv6].src,
+ self.pg0.remote_ip6)
+
+ # in2out
+ pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=self.pg0.remote_ip6, dst=ip[IPv6].src) /
+ ICMPv6DestUnreach(code=1) /
+ packet[IPv6] for packet in capture_ip6]
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IP].src, self.nat_addr)
+ self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
+ self.assertEqual(packet[ICMP].type, 3)
+ self.assertEqual(packet[ICMP].code, 13)
+ inner = packet[IPerror]
+ self.assertEqual(inner.src, self.pg1.remote_ip4)
+ self.assertEqual(inner.dst, self.nat_addr)
+ self.assert_packet_checksums_valid(packet)
+ if inner.haslayer(TCPerror):
+ self.assertEqual(inner[TCPerror].dport, self.tcp_port_out)
+ elif inner.haslayer(UDPerror):
+ self.assertEqual(inner[UDPerror].dport, self.udp_port_out)
+ else:
+ self.assertEqual(inner[ICMPerror].id, self.icmp_id_out)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # out2in
+ pkts = [Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ ICMP(type=3, code=13) /
+ packet[IP] for packet in capture_ip4]
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IPv6].src, ip.src)
+ self.assertEqual(packet[IPv6].dst, self.pg0.remote_ip6)
+ icmp = packet[ICMPv6DestUnreach]
+ self.assertEqual(icmp.code, 1)
+ inner = icmp[IPerror6]
+ self.assertEqual(inner.src, self.pg0.remote_ip6)
+ self.assertEqual(inner.dst, ip.src)
+ self.assert_icmpv6_checksum_valid(packet)
+ if inner.haslayer(TCPerror):
+ self.assertEqual(inner[TCPerror].sport, self.tcp_port_in)
+ elif inner.haslayer(UDPerror):
+ self.assertEqual(inner[UDPerror].sport, self.udp_port_in)
+ else:
+ self.assertEqual(inner[ICMPv6EchoRequest].id,
+ self.icmp_id_in)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_hairpinning(self):
+ """ NAT64 hairpinning """
+
+ client = self.pg0.remote_hosts[0]
+ server = self.pg0.remote_hosts[1]
+ server_tcp_in_port = 22
+ server_tcp_out_port = 4022
+ server_udp_in_port = 23
+ server_udp_out_port = 4023
+ client_tcp_in_port = 1234
+ client_udp_in_port = 1235
+ client_tcp_out_port = 0
+ client_udp_out_port = 0
+ ip = IPv6(src=''.join(['64:ff9b::', self.nat_addr]))
+ nat_addr_ip6 = ip.src
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n,
+ o_addr=self.nat_addr,
+ i_port=server_tcp_in_port,
+ o_port=server_tcp_out_port,
+ proto=IP_PROTOS.tcp, vrf_id=0,
+ is_add=1)
+ self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n,
+ o_addr=self.nat_addr,
+ i_port=server_udp_in_port,
+ o_port=server_udp_out_port,
+ proto=IP_PROTOS.udp, vrf_id=0,
+ is_add=1)
+
+ # client to server
+ pkts = []
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=client.ip6, dst=nat_addr_ip6) /
+ TCP(sport=client_tcp_in_port, dport=server_tcp_out_port))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=client.ip6, dst=nat_addr_ip6) /
+ UDP(sport=client_udp_in_port, dport=server_udp_out_port))
+ pkts.append(p)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IPv6].src, nat_addr_ip6)
+ self.assertEqual(packet[IPv6].dst, server.ip6)
+ self.assert_packet_checksums_valid(packet)
+ if packet.haslayer(TCP):
+ self.assertNotEqual(packet[TCP].sport, client_tcp_in_port)
+ self.assertEqual(packet[TCP].dport, server_tcp_in_port)
+ client_tcp_out_port = packet[TCP].sport
+ else:
+ self.assertNotEqual(packet[UDP].sport, client_udp_in_port)
+ self.assertEqual(packet[UDP].dport, server_udp_in_port)
+ client_udp_out_port = packet[UDP].sport
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # server to client
+ pkts = []
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=server.ip6, dst=nat_addr_ip6) /
+ TCP(sport=server_tcp_in_port, dport=client_tcp_out_port))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=server.ip6, dst=nat_addr_ip6) /
+ UDP(sport=server_udp_in_port, dport=client_udp_out_port))
+ pkts.append(p)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IPv6].src, nat_addr_ip6)
+ self.assertEqual(packet[IPv6].dst, client.ip6)
+ self.assert_packet_checksums_valid(packet)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].sport, server_tcp_out_port)
+ self.assertEqual(packet[TCP].dport, client_tcp_in_port)
+ else:
+ self.assertEqual(packet[UDP].sport, server_udp_out_port)
+ self.assertEqual(packet[UDP].dport, client_udp_in_port)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # ICMP error
+ pkts = []
+ pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=client.ip6, dst=nat_addr_ip6) /
+ ICMPv6DestUnreach(code=1) /
+ packet[IPv6] for packet in capture]
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IPv6].src, nat_addr_ip6)
+ self.assertEqual(packet[IPv6].dst, server.ip6)
+ icmp = packet[ICMPv6DestUnreach]
+ self.assertEqual(icmp.code, 1)
+ inner = icmp[IPerror6]
+ self.assertEqual(inner.src, server.ip6)
+ self.assertEqual(inner.dst, nat_addr_ip6)
+ self.assert_packet_checksums_valid(packet)
+ if inner.haslayer(TCPerror):
+ self.assertEqual(inner[TCPerror].sport, server_tcp_in_port)
+ self.assertEqual(inner[TCPerror].dport,
+ client_tcp_out_port)
+ else:
+ self.assertEqual(inner[UDPerror].sport, server_udp_in_port)
+ self.assertEqual(inner[UDPerror].dport,
+ client_udp_out_port)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_prefix(self):
+ """ NAT64 Network-Specific Prefix """
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.vrf1_nat_addr,
+ end_addr=self.vrf1_nat_addr,
+ vrf_id=self.vrf1_id, is_add=1)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg2.sw_if_index)
+
+ # Add global prefix
+ global_pref64 = "2001:db8::"
+ global_pref64_len = 32
+ global_pref64_str = "{}/{}".format(global_pref64, global_pref64_len)
+ self.vapi.nat64_add_del_prefix(prefix=global_pref64_str, vrf_id=0,
+ is_add=1)
+
+ prefix = self.vapi.nat64_prefix_dump()
+ self.assertEqual(len(prefix), 1)
+ self.assertEqual(str(prefix[0].prefix), global_pref64_str)
+ self.assertEqual(prefix[0].vrf_id, 0)
+
+ # Add tenant specific prefix
+ vrf1_pref64 = "2001:db8:122:300::"
+ vrf1_pref64_len = 56
+ vrf1_pref64_str = "{}/{}".format(vrf1_pref64, vrf1_pref64_len)
+ self.vapi.nat64_add_del_prefix(prefix=vrf1_pref64_str,
+ vrf_id=self.vrf1_id, is_add=1)
+
+ prefix = self.vapi.nat64_prefix_dump()
+ self.assertEqual(len(prefix), 2)
+
+ # Global prefix
+ pkts = self.create_stream_in_ip6(self.pg0,
+ self.pg1,
+ pref=global_pref64,
+ plen=global_pref64_len)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.nat_addr,
+ dst_ip=self.pg1.remote_ip4)
+
+ pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ dst_ip = self.compose_ip6(self.pg1.remote_ip4,
+ global_pref64,
+ global_pref64_len)
+ self.verify_capture_in_ip6(capture, dst_ip, self.pg0.remote_ip6)
+
+ # Tenant specific prefix
+ pkts = self.create_stream_in_ip6(self.pg2,
+ self.pg1,
+ pref=vrf1_pref64,
+ plen=vrf1_pref64_len)
+ self.pg2.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.vrf1_nat_addr,
+ dst_ip=self.pg1.remote_ip4)
+
+ pkts = self.create_stream_out(self.pg1, dst_ip=self.vrf1_nat_addr)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg2.get_capture(len(pkts))
+ dst_ip = self.compose_ip6(self.pg1.remote_ip4,
+ vrf1_pref64,
+ vrf1_pref64_len)
+ self.verify_capture_in_ip6(capture, dst_ip, self.pg2.remote_ip6)
+
+ def test_unknown_proto(self):
+ """ NAT64 translate packet with unknown protocol """
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+ remote_ip6 = self.compose_ip6(self.pg1.remote_ip4, '64:ff9b::', 96)
+
+ # in2out
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=self.pg0.remote_ip6, dst=remote_ip6) /
+ TCP(sport=self.tcp_port_in, dport=20))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg1.get_capture(1)
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=self.pg0.remote_ip6, dst=remote_ip6, nh=47) /
+ GRE() /
+ IP(src=self.pg2.local_ip4, dst=self.pg2.remote_ip4) /
+ TCP(sport=1234, dport=1234))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg1.get_capture(1)
+ packet = p[0]
+ try:
+ self.assertEqual(packet[IP].src, self.nat_addr)
+ self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
+ self.assertEqual(packet.haslayer(GRE), 1)
+ self.assert_packet_checksums_valid(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # out2in
+ p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg2.local_ip4) /
+ TCP(sport=1234, dport=1234))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg0.get_capture(1)
+ packet = p[0]
+ try:
+ self.assertEqual(packet[IPv6].src, remote_ip6)
+ self.assertEqual(packet[IPv6].dst, self.pg0.remote_ip6)
+ self.assertEqual(packet[IPv6].nh, 47)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_hairpinning_unknown_proto(self):
+ """ NAT64 translate packet with unknown protocol - hairpinning """
+
+ client = self.pg0.remote_hosts[0]
+ server = self.pg0.remote_hosts[1]
+ server_tcp_in_port = 22
+ server_tcp_out_port = 4022
+ client_tcp_in_port = 1234
+ client_tcp_out_port = 1235
+ server_nat_ip = "10.0.0.100"
+ client_nat_ip = "10.0.0.110"
+ server_nat_ip6 = self.compose_ip6(server_nat_ip, '64:ff9b::', 96)
+ client_nat_ip6 = self.compose_ip6(client_nat_ip, '64:ff9b::', 96)
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=server_nat_ip,
+ end_addr=client_nat_ip,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n,
+ o_addr=server_nat_ip,
+ i_port=server_tcp_in_port,
+ o_port=server_tcp_out_port,
+ proto=IP_PROTOS.tcp, vrf_id=0,
+ is_add=1)
+
+ self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n,
+ o_addr=server_nat_ip, i_port=0,
+ o_port=0,
+ proto=IP_PROTOS.gre, vrf_id=0,
+ is_add=1)
+
+ self.vapi.nat64_add_del_static_bib(i_addr=client.ip6n,
+ o_addr=client_nat_ip,
+ i_port=client_tcp_in_port,
+ o_port=client_tcp_out_port,
+ proto=IP_PROTOS.tcp, vrf_id=0,
+ is_add=1)
+
+ # client to server
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=client.ip6, dst=server_nat_ip6) /
+ TCP(sport=client_tcp_in_port, dport=server_tcp_out_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg0.get_capture(1)
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=client.ip6, dst=server_nat_ip6, nh=IP_PROTOS.gre) /
+ GRE() /
+ IP(src=self.pg2.local_ip4, dst=self.pg2.remote_ip4) /
+ TCP(sport=1234, dport=1234))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg0.get_capture(1)
+ packet = p[0]
+ try:
+ self.assertEqual(packet[IPv6].src, client_nat_ip6)
+ self.assertEqual(packet[IPv6].dst, server.ip6)
+ self.assertEqual(packet[IPv6].nh, IP_PROTOS.gre)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # server to client
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IPv6(src=server.ip6, dst=client_nat_ip6, nh=IP_PROTOS.gre) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg2.local_ip4) /
+ TCP(sport=1234, dport=1234))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg0.get_capture(1)
+ packet = p[0]
+ try:
+ self.assertEqual(packet[IPv6].src, server_nat_ip6)
+ self.assertEqual(packet[IPv6].dst, client.ip6)
+ self.assertEqual(packet[IPv6].nh, IP_PROTOS.gre)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_one_armed_nat64(self):
+ """ One armed NAT64 """
+ external_port = 0
+ remote_host_ip6 = self.compose_ip6(self.pg3.remote_ip4,
+ '64:ff9b::',
+ 96)
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg3.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg3.sw_if_index)
+
+ # in2out
+ p = (Ether(src=self.pg3.remote_mac, dst=self.pg3.local_mac) /
+ IPv6(src=self.pg3.remote_ip6, dst=remote_host_ip6) /
+ TCP(sport=12345, dport=80))
+ self.pg3.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg3.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.nat_addr)
+ self.assertEqual(ip.dst, self.pg3.remote_ip4)
+ self.assertNotEqual(tcp.sport, 12345)
+ external_port = tcp.sport
+ self.assertEqual(tcp.dport, 80)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # out2in
+ p = (Ether(src=self.pg3.remote_mac, dst=self.pg3.local_mac) /
+ IP(src=self.pg3.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=80, dport=external_port))
+ self.pg3.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg3.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IPv6]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, remote_host_ip6)
+ self.assertEqual(ip.dst, self.pg3.remote_ip6)
+ self.assertEqual(tcp.sport, 80)
+ self.assertEqual(tcp.dport, 12345)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ def test_frag_in_order(self):
+ """ NAT64 translate fragments arriving in order """
+ self.tcp_port_in = random.randint(1025, 65535)
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ # in2out
+ data = b'a' * 200
+ pkts = self.create_stream_frag_ip6(self.pg0, self.pg1.remote_ip4,
+ self.tcp_port_in, 20, data)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg1.get_capture(len(pkts))
+ p = self.reass_frags_and_verify(frags,
+ self.nat_addr,
+ self.pg1.remote_ip4)
+ self.assertEqual(p[TCP].dport, 20)
+ self.assertNotEqual(p[TCP].sport, self.tcp_port_in)
+ self.tcp_port_out = p[TCP].sport
+ self.assertEqual(data, p[Raw].load)
+
+ # out2in
+ data = b"A" * 4 + b"b" * 16 + b"C" * 3
+ pkts = self.create_stream_frag(self.pg1,
+ self.nat_addr,
+ 20,
+ self.tcp_port_out,
+ data)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg0.get_capture(len(pkts))
+ self.logger.debug(ppc("Captured:", frags))
+ src = self.compose_ip6(self.pg1.remote_ip4, '64:ff9b::', 96)
+ p = self.reass_frags_and_verify_ip6(frags, src, self.pg0.remote_ip6)
+ self.assertEqual(p[TCP].sport, 20)
+ self.assertEqual(p[TCP].dport, self.tcp_port_in)
+ self.assertEqual(data, p[Raw].load)
+
+ def test_reass_hairpinning(self):
+ """ NAT64 fragments hairpinning """
+ data = b'a' * 200
+ server = self.pg0.remote_hosts[1]
+ server_in_port = random.randint(1025, 65535)
+ server_out_port = random.randint(1025, 65535)
+ client_in_port = random.randint(1025, 65535)
+ ip = IPv6(src=''.join(['64:ff9b::', self.nat_addr]))
+ nat_addr_ip6 = ip.src
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ # add static BIB entry for server
+ self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n,
+ o_addr=self.nat_addr,
+ i_port=server_in_port,
+ o_port=server_out_port,
+ proto=IP_PROTOS.tcp, vrf_id=0,
+ is_add=1)
+
+ # send packet from host to server
+ pkts = self.create_stream_frag_ip6(self.pg0,
+ self.nat_addr,
+ client_in_port,
+ server_out_port,
+ data)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg0.get_capture(len(pkts))
+ self.logger.debug(ppc("Captured:", frags))
+ p = self.reass_frags_and_verify_ip6(frags, nat_addr_ip6, server.ip6)
+ self.assertNotEqual(p[TCP].sport, client_in_port)
+ self.assertEqual(p[TCP].dport, server_in_port)
+ self.assertEqual(data, p[Raw].load)
+
+ def test_frag_out_of_order(self):
+ """ NAT64 translate fragments arriving out of order """
+ self.tcp_port_in = random.randint(1025, 65535)
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ # in2out
+ data = b'a' * 200
+ pkts = self.create_stream_frag_ip6(self.pg0, self.pg1.remote_ip4,
+ self.tcp_port_in, 20, data)
+ pkts.reverse()
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg1.get_capture(len(pkts))
+ p = self.reass_frags_and_verify(frags,
+ self.nat_addr,
+ self.pg1.remote_ip4)
+ self.assertEqual(p[TCP].dport, 20)
+ self.assertNotEqual(p[TCP].sport, self.tcp_port_in)
+ self.tcp_port_out = p[TCP].sport
+ self.assertEqual(data, p[Raw].load)
+
+ # out2in
+ data = b"A" * 4 + b"B" * 16 + b"C" * 3
+ pkts = self.create_stream_frag(self.pg1,
+ self.nat_addr,
+ 20,
+ self.tcp_port_out,
+ data)
+ pkts.reverse()
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg0.get_capture(len(pkts))
+ src = self.compose_ip6(self.pg1.remote_ip4, '64:ff9b::', 96)
+ p = self.reass_frags_and_verify_ip6(frags, src, self.pg0.remote_ip6)
+ self.assertEqual(p[TCP].sport, 20)
+ self.assertEqual(p[TCP].dport, self.tcp_port_in)
+ self.assertEqual(data, p[Raw].load)
+
+ def test_interface_addr(self):
+ """ Acquire NAT64 pool addresses from interface """
+ self.vapi.nat64_add_del_interface_addr(
+ is_add=1,
+ sw_if_index=self.pg4.sw_if_index)
+
+ # no address in NAT64 pool
+ addresses = self.vapi.nat44_address_dump()
+ self.assertEqual(0, len(addresses))
+
+ # configure interface address and check NAT64 address pool
+ self.pg4.config_ip4()
+ addresses = self.vapi.nat64_pool_addr_dump()
+ self.assertEqual(len(addresses), 1)
+
+ self.assertEqual(str(addresses[0].address),
+ self.pg4.local_ip4)
+
+ # remove interface address and check NAT64 address pool
+ self.pg4.unconfig_ip4()
+ addresses = self.vapi.nat64_pool_addr_dump()
+ self.assertEqual(0, len(addresses))
+
+ # TODO: ipfix needs to be separated from NAT base plugin
+ @unittest.skipUnless(running_extended_tests, "part of extended tests")
+ def test_ipfix_max_bibs_sessions(self):
+ """ IPFIX logging maximum session and BIB entries exceeded """
+ max_bibs = 1280
+ max_sessions = 2560
+ remote_host_ip6 = self.compose_ip6(self.pg1.remote_ip4,
+ '64:ff9b::',
+ 96)
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+
+ pkts = []
+ src = ""
+ for i in range(0, max_bibs):
+ src = "fd01:aa::%x" % (i)
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=src, dst=remote_host_ip6) /
+ TCP(sport=12345, dport=80))
+ pkts.append(p)
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=src, dst=remote_host_ip6) /
+ TCP(sport=12345, dport=22))
+ pkts.append(p)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(max_sessions)
+
+ self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4,
+ src_address=self.pg3.local_ip4,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id,
+ src_port=self.ipfix_src_port,
+ enable=1)
+
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=src, dst=remote_host_ip6) /
+ TCP(sport=12345, dport=25))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.assert_nothing_captured()
+ sleep(1)
+ self.vapi.ipfix_flush()
+ capture = self.pg3.get_capture(7)
+ ipfix = IPFIXDecoder()
+ # first load template
+ for p in capture:
+ self.assertTrue(p.haslayer(IPFIX))
+ self.assertEqual(p[IP].src, self.pg3.local_ip4)
+ self.assertEqual(p[IP].dst, self.pg3.remote_ip4)
+ self.assertEqual(p[UDP].sport, self.ipfix_src_port)
+ self.assertEqual(p[UDP].dport, 4739)
+ self.assertEqual(p[IPFIX].observationDomainID,
+ self.ipfix_domain_id)
+ if p.haslayer(Template):
+ ipfix.add_template(p.getlayer(Template))
+ # verify events in data set
+ for p in capture:
+ if p.haslayer(Data):
+ data = ipfix.decode_data_set(p.getlayer(Set))
+ self.verify_ipfix_max_sessions(data, max_sessions)
+
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=self.pg0.remote_ip6, dst=remote_host_ip6) /
+ TCP(sport=12345, dport=80))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.assert_nothing_captured()
+ sleep(1)
+ self.vapi.ipfix_flush()
+ capture = self.pg3.get_capture(1)
+ # verify events in data set
+ for p in capture:
+ self.assertTrue(p.haslayer(IPFIX))
+ self.assertEqual(p[IP].src, self.pg3.local_ip4)
+ self.assertEqual(p[IP].dst, self.pg3.remote_ip4)
+ self.assertEqual(p[UDP].sport, self.ipfix_src_port)
+ self.assertEqual(p[UDP].dport, 4739)
+ self.assertEqual(p[IPFIX].observationDomainID,
+ self.ipfix_domain_id)
+ if p.haslayer(Data):
+ data = ipfix.decode_data_set(p.getlayer(Set))
+ self.verify_ipfix_max_bibs(data, max_bibs)
+
+ # TODO: ipfix needs to be separated from NAT base plugin
+ @unittest.skipUnless(running_extended_tests, "part of extended tests")
+ def test_ipfix_bib_ses(self):
+ """ IPFIX logging NAT64 BIB/session create and delete events """
+ self.tcp_port_in = random.randint(1025, 65535)
+ remote_host_ip6 = self.compose_ip6(self.pg1.remote_ip4,
+ '64:ff9b::',
+ 96)
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+ self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4,
+ src_address=self.pg3.local_ip4,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id,
+ src_port=self.ipfix_src_port,
+ enable=1)
+
+ # Create
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=self.pg0.remote_ip6, dst=remote_host_ip6) /
+ TCP(sport=self.tcp_port_in, dport=25))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg1.get_capture(1)
+ self.tcp_port_out = p[0][TCP].sport
+ self.vapi.ipfix_flush()
+ capture = self.pg3.get_capture(8)
+ ipfix = IPFIXDecoder()
+ # first load template
+ for p in capture:
+ self.assertTrue(p.haslayer(IPFIX))
+ self.assertEqual(p[IP].src, self.pg3.local_ip4)
+ self.assertEqual(p[IP].dst, self.pg3.remote_ip4)
+ self.assertEqual(p[UDP].sport, self.ipfix_src_port)
+ self.assertEqual(p[UDP].dport, 4739)
+ self.assertEqual(p[IPFIX].observationDomainID,
+ self.ipfix_domain_id)
+ if p.haslayer(Template):
+ ipfix.add_template(p.getlayer(Template))
+ # verify events in data set
+ for p in capture:
+ if p.haslayer(Data):
+ data = ipfix.decode_data_set(p.getlayer(Set))
+ if scapy.compat.orb(data[0][230]) == 10:
+ self.verify_ipfix_bib(data, 1, self.pg0.remote_ip6)
+ elif scapy.compat.orb(data[0][230]) == 6:
+ self.verify_ipfix_nat64_ses(data,
+ 1,
+ self.pg0.remote_ip6,
+ self.pg1.remote_ip4,
+ 25)
+ else:
+ self.logger.error(ppp("Unexpected or invalid packet: ", p))
+
+ # Delete
+ self.pg_enable_capture(self.pg_interfaces)
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=0)
+ self.vapi.ipfix_flush()
+ capture = self.pg3.get_capture(2)
+ # verify events in data set
+ for p in capture:
+ self.assertTrue(p.haslayer(IPFIX))
+ self.assertEqual(p[IP].src, self.pg3.local_ip4)
+ self.assertEqual(p[IP].dst, self.pg3.remote_ip4)
+ self.assertEqual(p[UDP].sport, self.ipfix_src_port)
+ self.assertEqual(p[UDP].dport, 4739)
+ self.assertEqual(p[IPFIX].observationDomainID,
+ self.ipfix_domain_id)
+ if p.haslayer(Data):
+ data = ipfix.decode_data_set(p.getlayer(Set))
+ if scapy.compat.orb(data[0][230]) == 11:
+ self.verify_ipfix_bib(data, 0, self.pg0.remote_ip6)
+ elif scapy.compat.orb(data[0][230]) == 7:
+ self.verify_ipfix_nat64_ses(data,
+ 0,
+ self.pg0.remote_ip6,
+ self.pg1.remote_ip4,
+ 25)
+ else:
+ self.logger.error(ppp("Unexpected or invalid packet: ", p))
+
+ def test_syslog_sess(self):
+ """ Test syslog session creation and deletion """
+ self.tcp_port_in = random.randint(1025, 65535)
+ remote_host_ip6 = self.compose_ip6(self.pg1.remote_ip4,
+ '64:ff9b::',
+ 96)
+
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=1)
+ flags = self.config_flags.NAT_IS_INSIDE
+ self.vapi.nat64_add_del_interface(is_add=1, flags=flags,
+ sw_if_index=self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(is_add=1, flags=0,
+ sw_if_index=self.pg1.sw_if_index)
+ self.vapi.syslog_set_filter(
+ self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_INFO)
+ self.vapi.syslog_set_sender(self.pg3.local_ip4, self.pg3.remote_ip4)
+
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=self.pg0.remote_ip6, dst=remote_host_ip6) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg1.get_capture(1)
+ self.tcp_port_out = p[0][TCP].sport
+ capture = self.pg3.get_capture(1)
+ self.verify_syslog_sess(capture[0][Raw].load, is_ip6=True)
+
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr,
+ end_addr=self.nat_addr,
+ vrf_id=0xFFFFFFFF,
+ is_add=0)
+ capture = self.pg3.get_capture(1)
+ self.verify_syslog_sess(capture[0][Raw].load, False, True)
+
+ def nat64_get_ses_num(self):
+ """
+ Return number of active NAT64 sessions.
+ """
+ st = self.vapi.nat64_st_dump(proto=255)
+ return len(st)
+
+ def clear_nat64(self):
+ """
+ Clear NAT64 configuration.
+ """
+ self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id,
+ src_port=self.ipfix_src_port,
+ enable=0)
+ self.ipfix_src_port = 4739
+ self.ipfix_domain_id = 1
+
+ self.vapi.syslog_set_filter(
+ self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_EMERG)
+
+ self.vapi.nat64_set_timeouts(udp=300, tcp_established=7440,
+ tcp_transitory=240, icmp=60)
+
+ interfaces = self.vapi.nat64_interface_dump()
+ for intf in interfaces:
+ self.vapi.nat64_add_del_interface(is_add=0, flags=intf.flags,
+ sw_if_index=intf.sw_if_index)
+
+ bib = self.vapi.nat64_bib_dump(proto=255)
+ for bibe in bib:
+ if bibe.flags & self.config_flags.NAT_IS_STATIC:
+ self.vapi.nat64_add_del_static_bib(i_addr=bibe.i_addr,
+ o_addr=bibe.o_addr,
+ i_port=bibe.i_port,
+ o_port=bibe.o_port,
+ proto=bibe.proto,
+ vrf_id=bibe.vrf_id,
+ is_add=0)
+
+ adresses = self.vapi.nat64_pool_addr_dump()
+ for addr in adresses:
+ self.vapi.nat64_add_del_pool_addr_range(start_addr=addr.address,
+ end_addr=addr.address,
+ vrf_id=addr.vrf_id,
+ is_add=0)
+
+ prefixes = self.vapi.nat64_prefix_dump()
+ for prefix in prefixes:
+ self.vapi.nat64_add_del_prefix(prefix=str(prefix.prefix),
+ vrf_id=prefix.vrf_id, is_add=0)
+
+ bibs = self.statistics.get_counter('/nat64/total-bibs')
+ self.assertEqual(bibs[0][0], 0)
+ sessions = self.statistics.get_counter('/nat64/total-sessions')
+ self.assertEqual(sessions[0][0], 0)
+
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)