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-rw-r--r--src/plugins/nat/test/test_det44.py682
1 files changed, 682 insertions, 0 deletions
diff --git a/src/plugins/nat/test/test_det44.py b/src/plugins/nat/test/test_det44.py
new file mode 100644
index 00000000000..ced77468959
--- /dev/null
+++ b/src/plugins/nat/test/test_det44.py
@@ -0,0 +1,682 @@
+#!/usr/bin/env python3
+
+import socket
+import struct
+import unittest
+import scapy.compat
+from time import sleep
+from framework import VppTestCase, running_extended_tests
+from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder
+from scapy.layers.inet import IP, TCP, UDP, ICMP
+from scapy.layers.inet import IPerror, UDPerror
+from scapy.layers.l2 import Ether
+from util import ppp
+
+
+class TestDET44(VppTestCase):
+ """ Deterministic NAT Test Cases """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestDET44, cls).setUpClass()
+ cls.vapi.cli("set log class det44 level debug")
+
+ cls.tcp_port_in = 6303
+ cls.tcp_external_port = 6303
+ cls.udp_port_in = 6304
+ cls.udp_external_port = 6304
+ cls.icmp_id_in = 6305
+ cls.nat_addr = '10.0.0.3'
+
+ cls.create_pg_interfaces(range(3))
+ cls.interfaces = list(cls.pg_interfaces)
+
+ for i in cls.interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ cls.pg0.generate_remote_hosts(2)
+ cls.pg0.configure_ipv4_neighbors()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestDET44, cls).tearDownClass()
+
+ def setUp(self):
+ super(TestDET44, self).setUp()
+ self.vapi.det44_plugin_enable_disable(enable=1)
+
+ def tearDown(self):
+ super(TestDET44, self).tearDown()
+ if not self.vpp_dead:
+ self.vapi.det44_plugin_enable_disable(enable=0)
+
+ def show_commands_at_teardown(self):
+ self.logger.info(self.vapi.cli("show det44 interfaces"))
+ self.logger.info(self.vapi.cli("show det44 timeouts"))
+ self.logger.info(self.vapi.cli("show det44 mappings"))
+ self.logger.info(self.vapi.cli("show det44 sessions"))
+
+ def verify_capture_in(self, capture, in_if):
+ """
+ Verify captured packets on inside network
+
+ :param capture: Captured packets
+ :param in_if: Inside interface
+ """
+ fired = False
+ for packet in capture:
+ try:
+ self.assert_packet_checksums_valid(packet)
+ self.assertEqual(packet[IP].dst, in_if.remote_ip4)
+ 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[ICMP].id, self.icmp_id_in)
+ except:
+ fired = True
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(inside network):", packet))
+ if fired:
+ raise
+
+ def verify_ipfix_max_entries_per_user(self, data, limit, src_addr):
+ """
+ Verify IPFIX maximum entries per user exceeded event
+
+ :param data: Decoded IPFIX data records
+ :param limit: Number of maximum entries per user
+ :param src_addr: IPv4 source address
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ self.assertEqual(scapy.compat.orb(record[230]), 13)
+ # natQuotaExceededEvent
+ self.assertEqual(struct.pack("I", 3), record[466])
+ # maxEntriesPerUser
+ self.assertEqual(struct.pack("I", limit), record[473])
+ # sourceIPv4Address
+ self.assertEqual(socket.inet_pton(socket.AF_INET, src_addr), record[8])
+
+ def initiate_tcp_session(self, in_if, out_if):
+ """
+ Initiates TCP session 3 WAY HAND SHAKE
+
+ :param in_if: Inside interface
+ :param out_if: Outside interface
+ """
+
+ # SYN packet in->out
+ p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
+ IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
+ flags="S"))
+ in_if.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = out_if.get_capture(1)
+ p = capture[0]
+ self.tcp_port_out = p[TCP].sport
+
+ # SYN + ACK packet out->in
+ p = (Ether(src=out_if.remote_mac, dst=out_if.local_mac) /
+ IP(src=out_if.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=self.tcp_external_port, dport=self.tcp_port_out,
+ flags="SA"))
+ out_if.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ in_if.get_capture(1)
+
+ # ACK packet in->out
+ p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
+ IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
+ flags="A"))
+ in_if.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ out_if.get_capture(1)
+
+ def create_stream_in(self, in_if, out_if, ttl=64):
+ """
+ Create packet stream for inside network
+
+ :param in_if: Inside interface
+ :param out_if: Outside interface
+ :param ttl: TTL of generated packets
+ """
+ pkts = []
+ # TCP
+ p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
+ IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port))
+ pkts.append(p)
+
+ # UDP
+ p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
+ IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) /
+ UDP(sport=self.udp_port_in, dport=self.udp_external_port))
+ pkts.append(p)
+
+ # ICMP
+ p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
+ IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) /
+ ICMP(id=self.icmp_id_in, type='echo-request'))
+ pkts.append(p)
+
+ return pkts
+
+ def create_stream_out(self, out_if, dst_ip=None, ttl=64):
+ """
+ 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
+ """
+ if dst_ip is None:
+ dst_ip = self.nat_addr
+ 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=self.tcp_port_out, sport=self.tcp_external_port))
+ pkts.append(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=self.udp_port_out, sport=self.udp_external_port))
+ 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=self.icmp_external_id, type='echo-reply'))
+ pkts.append(p)
+
+ return pkts
+
+ def verify_capture_out(self, capture, nat_ip=None):
+ """
+ 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)
+ """
+ if nat_ip is None:
+ nat_ip = self.nat_addr
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IP].src, nat_ip)
+ if packet.haslayer(TCP):
+ self.tcp_port_out = packet[TCP].sport
+ elif packet.haslayer(UDP):
+ self.udp_port_out = packet[UDP].sport
+ else:
+ self.icmp_external_id = packet[ICMP].id
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(outside network):", packet))
+ raise
+
+ def test_deterministic_mode(self):
+ """ NAT plugin run deterministic mode """
+ in_addr = '172.16.255.0'
+ out_addr = '172.17.255.50'
+ in_addr_t = '172.16.255.20'
+ in_plen = 24
+ out_plen = 32
+
+ self.vapi.det44_add_del_map(is_add=1, in_addr=in_addr,
+ in_plen=in_plen, out_addr=out_addr,
+ out_plen=out_plen)
+
+ rep1 = self.vapi.det44_forward(in_addr_t)
+ self.assertEqual(str(rep1.out_addr), out_addr)
+ rep2 = self.vapi.det44_reverse(rep1.out_port_hi, out_addr)
+
+ self.assertEqual(str(rep2.in_addr), in_addr_t)
+
+ deterministic_mappings = self.vapi.det44_map_dump()
+ self.assertEqual(len(deterministic_mappings), 1)
+ dsm = deterministic_mappings[0]
+ self.assertEqual(in_addr, str(dsm.in_addr))
+ self.assertEqual(in_plen, dsm.in_plen)
+ self.assertEqual(out_addr, str(dsm.out_addr))
+ self.assertEqual(out_plen, dsm.out_plen)
+
+ def test_set_timeouts(self):
+ """ Set deterministic NAT timeouts """
+ timeouts_before = self.vapi.det44_get_timeouts()
+
+ self.vapi.det44_set_timeouts(
+ udp=timeouts_before.udp + 10,
+ tcp_established=timeouts_before.tcp_established + 10,
+ tcp_transitory=timeouts_before.tcp_transitory + 10,
+ icmp=timeouts_before.icmp + 10)
+
+ timeouts_after = self.vapi.det44_get_timeouts()
+
+ self.assertNotEqual(timeouts_before.udp, timeouts_after.udp)
+ self.assertNotEqual(timeouts_before.icmp, timeouts_after.icmp)
+ self.assertNotEqual(timeouts_before.tcp_established,
+ timeouts_after.tcp_established)
+ self.assertNotEqual(timeouts_before.tcp_transitory,
+ timeouts_after.tcp_transitory)
+
+ def test_in(self):
+ """ DET44 translation test (TCP, UDP, ICMP) """
+
+ nat_ip = "10.0.0.10"
+
+ self.vapi.det44_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4,
+ in_plen=32,
+ out_addr=socket.inet_aton(nat_ip),
+ out_plen=32)
+
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg0.sw_if_index,
+ is_add=1, is_inside=1)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg1.sw_if_index,
+ is_add=1, is_inside=0)
+
+ # in2out
+ pkts = self.create_stream_in(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)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg1, nat_ip)
+ 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(capture, self.pg0)
+
+ # session dump test
+ sessions = self.vapi.det44_session_dump(self.pg0.remote_ip4)
+ self.assertEqual(len(sessions), 3)
+
+ # TCP session
+ s = sessions[0]
+ self.assertEqual(str(s.ext_addr), self.pg1.remote_ip4)
+ self.assertEqual(s.in_port, self.tcp_port_in)
+ self.assertEqual(s.out_port, self.tcp_port_out)
+ self.assertEqual(s.ext_port, self.tcp_external_port)
+
+ # UDP session
+ s = sessions[1]
+ self.assertEqual(str(s.ext_addr), self.pg1.remote_ip4)
+ self.assertEqual(s.in_port, self.udp_port_in)
+ self.assertEqual(s.out_port, self.udp_port_out)
+ self.assertEqual(s.ext_port, self.udp_external_port)
+
+ # ICMP session
+ s = sessions[2]
+ self.assertEqual(str(s.ext_addr), self.pg1.remote_ip4)
+ self.assertEqual(s.in_port, self.icmp_id_in)
+ self.assertEqual(s.out_port, self.icmp_external_id)
+
+ def test_multiple_users(self):
+ """ Deterministic NAT multiple users """
+
+ nat_ip = "10.0.0.10"
+ port_in = 80
+ external_port = 6303
+
+ host0 = self.pg0.remote_hosts[0]
+ host1 = self.pg0.remote_hosts[1]
+
+ self.vapi.det44_add_del_map(is_add=1, in_addr=host0.ip4, in_plen=24,
+ out_addr=socket.inet_aton(nat_ip),
+ out_plen=32)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg0.sw_if_index,
+ is_add=1, is_inside=1)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg1.sw_if_index,
+ is_add=1, is_inside=0)
+
+ # host0 to out
+ p = (Ether(src=host0.mac, dst=self.pg0.local_mac) /
+ IP(src=host0.ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=port_in, dport=external_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, nat_ip)
+ self.assertEqual(ip.dst, self.pg1.remote_ip4)
+ self.assertEqual(tcp.dport, external_port)
+ port_out0 = tcp.sport
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # host1 to out
+ p = (Ether(src=host1.mac, dst=self.pg0.local_mac) /
+ IP(src=host1.ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=port_in, dport=external_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, nat_ip)
+ self.assertEqual(ip.dst, self.pg1.remote_ip4)
+ self.assertEqual(tcp.dport, external_port)
+ port_out1 = tcp.sport
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ dms = self.vapi.det44_map_dump()
+ self.assertEqual(1, len(dms))
+ self.assertEqual(2, dms[0].ses_num)
+
+ # out to host0
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=nat_ip) /
+ TCP(sport=external_port, dport=port_out0))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.pg1.remote_ip4)
+ self.assertEqual(ip.dst, host0.ip4)
+ self.assertEqual(tcp.dport, port_in)
+ self.assertEqual(tcp.sport, external_port)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # out to host1
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=nat_ip) /
+ TCP(sport=external_port, dport=port_out1))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.pg1.remote_ip4)
+ self.assertEqual(ip.dst, host1.ip4)
+ self.assertEqual(tcp.dport, port_in)
+ self.assertEqual(tcp.sport, external_port)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet", p))
+ raise
+
+ # session close api test
+ self.vapi.det44_close_session_out(socket.inet_aton(nat_ip),
+ port_out1,
+ self.pg1.remote_ip4,
+ external_port)
+ dms = self.vapi.det44_map_dump()
+ self.assertEqual(dms[0].ses_num, 1)
+
+ self.vapi.det44_close_session_in(host0.ip4,
+ port_in,
+ self.pg1.remote_ip4,
+ external_port)
+ dms = self.vapi.det44_map_dump()
+ self.assertEqual(dms[0].ses_num, 0)
+
+ def test_tcp_session_close_detection_in(self):
+ """ DET44 TCP session close from inside network """
+ self.vapi.det44_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4,
+ in_plen=32,
+ out_addr=socket.inet_aton(self.nat_addr),
+ out_plen=32)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg0.sw_if_index,
+ is_add=1, is_inside=1)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg1.sw_if_index,
+ is_add=1, is_inside=0)
+
+ self.initiate_tcp_session(self.pg0, self.pg1)
+
+ # close the session from inside
+ try:
+ # FIN packet in -> out
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
+ flags="F"))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(1)
+
+ pkts = []
+
+ # ACK packet out -> in
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=self.tcp_external_port, dport=self.tcp_port_out,
+ flags="A"))
+ pkts.append(p)
+
+ # FIN packet out -> in
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=self.tcp_external_port, dport=self.tcp_port_out,
+ flags="F"))
+ pkts.append(p)
+
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg0.get_capture(2)
+
+ # ACK packet in -> out
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
+ flags="A"))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(1)
+
+ # Check if deterministic NAT44 closed the session
+ dms = self.vapi.det44_map_dump()
+ self.assertEqual(0, dms[0].ses_num)
+ except:
+ self.logger.error("TCP session termination failed")
+ raise
+
+ def test_tcp_session_close_detection_out(self):
+ """ Deterministic NAT TCP session close from outside network """
+ self.vapi.det44_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4,
+ in_plen=32,
+ out_addr=socket.inet_aton(self.nat_addr),
+ out_plen=32)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg0.sw_if_index,
+ is_add=1, is_inside=1)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg1.sw_if_index,
+ is_add=1, is_inside=0)
+
+ self.initiate_tcp_session(self.pg0, self.pg1)
+
+ # close the session from outside
+ try:
+ # FIN packet out -> in
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=self.tcp_external_port, dport=self.tcp_port_out,
+ flags="F"))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg0.get_capture(1)
+
+ pkts = []
+
+ # ACK packet in -> out
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
+ flags="A"))
+ pkts.append(p)
+
+ # ACK packet in -> out
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
+ flags="F"))
+ pkts.append(p)
+
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(2)
+
+ # ACK packet out -> in
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=self.tcp_external_port, dport=self.tcp_port_out,
+ flags="A"))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg0.get_capture(1)
+
+ # Check if deterministic NAT44 closed the session
+ dms = self.vapi.det44_map_dump()
+ self.assertEqual(0, dms[0].ses_num)
+ except:
+ self.logger.error("TCP session termination failed")
+ raise
+
+ @unittest.skipUnless(running_extended_tests, "part of extended tests")
+ def test_session_timeout(self):
+ """ Deterministic NAT session timeouts """
+ self.vapi.det44_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4,
+ in_plen=32,
+ out_addr=socket.inet_aton(self.nat_addr),
+ out_plen=32)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg0.sw_if_index,
+ is_add=1, is_inside=1)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg1.sw_if_index,
+ is_add=1, is_inside=0)
+
+ self.initiate_tcp_session(self.pg0, self.pg1)
+ self.vapi.det44_set_timeouts(udp=5, tcp_established=5,
+ tcp_transitory=5, icmp=5)
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(len(pkts))
+ sleep(15)
+
+ dms = self.vapi.det44_map_dump()
+ self.assertEqual(0, dms[0].ses_num)
+
+ # TODO: ipfix needs to be separated from NAT base plugin
+ @unittest.skipUnless(running_extended_tests, "part of extended tests")
+ def test_session_limit_per_user(self):
+ """ Deterministic NAT maximum sessions per user limit """
+ self.vapi.det44_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4,
+ in_plen=32,
+ out_addr=socket.inet_aton(self.nat_addr),
+ out_plen=32)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg0.sw_if_index,
+ is_add=1, is_inside=1)
+ self.vapi.det44_interface_add_del_feature(
+ sw_if_index=self.pg1.sw_if_index,
+ is_add=1, is_inside=0)
+ self.vapi.set_ipfix_exporter(collector_address=self.pg2.remote_ip4,
+ src_address=self.pg2.local_ip4,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.nat_ipfix_enable_disable(domain_id=1, src_port=4739,
+ enable=1)
+
+ pkts = []
+ for port in range(1025, 2025):
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ UDP(sport=port, dport=port))
+ pkts.append(p)
+
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(len(pkts))
+
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ UDP(sport=3001, dport=3002))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.assert_nothing_captured()
+
+ # verify ICMP error packet
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ self.assertTrue(p.haslayer(ICMP))
+ icmp = p[ICMP]
+ self.assertEqual(icmp.type, 3)
+ self.assertEqual(icmp.code, 1)
+ self.assertTrue(icmp.haslayer(IPerror))
+ inner_ip = icmp[IPerror]
+ self.assertEqual(inner_ip[UDPerror].sport, 3001)
+ self.assertEqual(inner_ip[UDPerror].dport, 3002)
+
+ dms = self.vapi.det44_map_dump()
+
+ self.assertEqual(1000, dms[0].ses_num)
+
+ # verify IPFIX logging
+ self.vapi.ipfix_flush()
+ sleep(1)
+ capture = self.pg2.get_capture(2)
+ ipfix = IPFIXDecoder()
+ # first load template
+ for p in capture:
+ self.assertTrue(p.haslayer(IPFIX))
+ 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_entries_per_user(data,
+ 1000,
+ self.pg0.remote_ip4)
+ self.vapi.nat_ipfix_enable_disable(domain_id=1, src_port=4739,
+ enable=0)