import socket
import unittest
-from logging import *
+import struct
from framework import VppTestCase, VppTestRunner
-
from scapy.layers.inet import IP, TCP, UDP, ICMP
-from scapy.layers.l2 import Ether
+from scapy.layers.l2 import Ether, ARP
+from scapy.data import IP_PROTOS
+from util import ppp
+from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder
class TestSNAT(VppTestCase):
cls.icmp_id_out = 6305
cls.snat_addr = '10.0.0.3'
- cls.create_pg_interfaces(range(7))
+ cls.create_pg_interfaces(range(8))
cls.interfaces = list(cls.pg_interfaces[0:4])
for i in cls.interfaces:
i.config_ip4()
i.resolve_arp()
+ cls.pg0.generate_remote_hosts(2)
+ cls.pg0.configure_ipv4_neighbors()
+
cls.overlapping_interfaces = list(list(cls.pg_interfaces[4:7]))
+ cls.pg4._local_ip4 = "172.16.255.1"
+ cls.pg4._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4)
+ cls.pg4._remote_hosts[0]._ip4 = "172.16.255.2"
+ cls.pg4.set_table_ip4(10)
+ cls.pg5._local_ip4 = "172.16.255.3"
+ cls.pg5._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4)
+ cls.pg5._remote_hosts[0]._ip4 = "172.16.255.4"
+ cls.pg5.set_table_ip4(10)
+ cls.pg6._local_ip4 = "172.16.255.1"
+ cls.pg6._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4)
+ cls.pg6._remote_hosts[0]._ip4 = "172.16.255.2"
+ cls.pg6.set_table_ip4(20)
for i in cls.overlapping_interfaces:
- i._local_ip4 = "172.16.255.1"
- i._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4)
- i._remote_hosts[0]._ip4 = "172.16.255.2"
- i.set_table_ip4(i.sw_if_index)
i.config_ip4()
i.admin_up()
i.resolve_arp()
+ cls.pg7.admin_up()
+
except Exception:
super(TestSNAT, cls).tearDownClass()
raise
:param dst_ip: Destination IP address (Default use global SNAT address)
"""
if dst_ip is None:
- dst_ip=self.snat_addr
+ dst_ip = self.snat_addr
pkts = []
# TCP
p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
if same_port:
self.assertEqual(packet[TCP].sport, self.tcp_port_in)
else:
- self.assertNotEqual(packet[TCP].sport, self.tcp_port_in)
+ self.assertNotEqual(
+ packet[TCP].sport, self.tcp_port_in)
self.tcp_port_out = packet[TCP].sport
elif packet.haslayer(UDP):
if same_port:
self.assertEqual(packet[UDP].sport, self.udp_port_in)
else:
- self.assertNotEqual(packet[UDP].sport, self.udp_port_in)
+ self.assertNotEqual(
+ packet[UDP].sport, self.udp_port_in)
self.udp_port_out = packet[UDP].sport
else:
if same_port:
self.assertNotEqual(packet[ICMP].id, self.icmp_id_in)
self.icmp_id_out = packet[ICMP].id
except:
- error("Unexpected or invalid packet (outside network):")
- error(packet.show())
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(outside network):", packet))
raise
def verify_capture_in(self, capture, in_if, packet_num=3):
else:
self.assertEqual(packet[ICMP].id, self.icmp_id_in)
except:
- error("Unexpected or invalid packet (inside network):")
- error(packet.show())
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(inside network):", packet))
raise
+ def verify_capture_no_translation(self, capture, ingress_if, egress_if):
+ """
+ Verify captured packet that don't have to be translated
+
+ :param capture: Captured packets
+ :param ingress_if: Ingress interface
+ :param egress_if: Egress interface
+ """
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IP].src, ingress_if.remote_ip4)
+ self.assertEqual(packet[IP].dst, egress_if.remote_ip4)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].sport, self.tcp_port_in)
+ elif packet.haslayer(UDP):
+ self.assertEqual(packet[UDP].sport, self.udp_port_in)
+ else:
+ self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(inside network):", packet))
+ raise
+
+ def verify_ipfix_nat44_ses(self, data):
+ """
+ Verify IPFIX NAT44 session create/delete event
+
+ :param data: Decoded IPFIX data records
+ """
+ nat44_ses_create_num = 0
+ nat44_ses_delete_num = 0
+ self.assertEqual(6, len(data))
+ for record in data:
+ # natEvent
+ self.assertIn(ord(record[230]), [4, 5])
+ if ord(record[230]) == 4:
+ nat44_ses_create_num += 1
+ else:
+ nat44_ses_delete_num += 1
+ # sourceIPv4Address
+ self.assertEqual(self.pg0.remote_ip4n, record[8])
+ # postNATSourceIPv4Address
+ self.assertEqual(socket.inet_pton(socket.AF_INET, self.snat_addr),
+ record[225])
+ # ingressVRFID
+ self.assertEqual(struct.pack("!I", 0), record[234])
+ # protocolIdentifier/sourceTransportPort/postNAPTSourceTransportPort
+ if IP_PROTOS.icmp == ord(record[4]):
+ self.assertEqual(struct.pack("!H", self.icmp_id_in), record[7])
+ self.assertEqual(struct.pack("!H", self.icmp_id_out),
+ record[227])
+ elif IP_PROTOS.tcp == ord(record[4]):
+ self.assertEqual(struct.pack("!H", self.tcp_port_in),
+ record[7])
+ self.assertEqual(struct.pack("!H", self.tcp_port_out),
+ record[227])
+ elif IP_PROTOS.udp == ord(record[4]):
+ self.assertEqual(struct.pack("!H", self.udp_port_in),
+ record[7])
+ self.assertEqual(struct.pack("!H", self.udp_port_out),
+ record[227])
+ else:
+ self.fail("Invalid protocol")
+ self.assertEqual(3, nat44_ses_create_num)
+ self.assertEqual(3, nat44_ses_delete_num)
+
+ def verify_ipfix_addr_exhausted(self, data):
+ """
+ Verify IPFIX NAT addresses event
+
+ :param data: Decoded IPFIX data records
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ self.assertEqual(ord(record[230]), 3)
+ # natPoolID
+ self.assertEqual(struct.pack("!I", 0), record[283])
+
def clear_snat(self):
"""
Clear SNAT configuration.
"""
+ if self.pg7.has_ip4_config:
+ self.pg7.unconfig_ip4()
+
+ interfaces = self.vapi.snat_interface_addr_dump()
+ for intf in interfaces:
+ self.vapi.snat_add_interface_addr(intf.sw_if_index, is_add=0)
+
+ self.vapi.snat_ipfix(enable=0)
+
interfaces = self.vapi.snat_interface_dump()
for intf in interfaces:
self.vapi.snat_interface_add_del_feature(intf.sw_if_index,
external_port=sm.external_port,
addr_only=sm.addr_only,
vrf_id=sm.vrf_id,
+ protocol=sm.protocol,
is_add=0)
adresses = self.vapi.snat_address_dump()
addr.ip_address,
is_add=0)
- def snat_add_static_mapping(self, local_ip, external_ip, local_port=0,
- external_port=0, vrf_id=0, is_add=1):
+ def snat_add_static_mapping(self, local_ip, external_ip='0.0.0.0',
+ local_port=0, external_port=0, vrf_id=0,
+ is_add=1, external_sw_if_index=0xFFFFFFFF,
+ proto=0):
"""
Add/delete S-NAT static mapping
:param external_port: External port number (Optional)
:param vrf_id: VRF ID (Default 0)
:param is_add: 1 if add, 0 if delete (Default add)
+ :param external_sw_if_index: External interface instead of IP address
+ :param proto: IP protocol (Mandatory if port specified)
"""
addr_only = 1
if local_port and external_port:
addr_only = 0
l_ip = socket.inet_pton(socket.AF_INET, local_ip)
e_ip = socket.inet_pton(socket.AF_INET, external_ip)
- self.vapi.snat_add_static_mapping(l_ip, e_ip, local_port, external_port,
- addr_only, vrf_id, is_add)
+ self.vapi.snat_add_static_mapping(
+ l_ip,
+ e_ip,
+ external_sw_if_index,
+ local_port,
+ external_port,
+ addr_only,
+ vrf_id,
+ proto,
+ is_add)
def snat_add_address(self, ip, is_add=1):
"""
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture()
+ capture = self.pg1.get_capture(len(pkts))
self.verify_capture_out(capture)
# out2in
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture()
+ capture = self.pg0.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg0)
def test_static_in(self):
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture()
+ capture = self.pg1.get_capture(len(pkts))
self.verify_capture_out(capture, nat_ip, True)
# out2in
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture()
+ capture = self.pg0.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg0)
def test_static_out(self):
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture()
+ capture = self.pg0.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg0)
# in2out
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture()
+ capture = self.pg1.get_capture(len(pkts))
self.verify_capture_out(capture, nat_ip, True)
def test_static_with_port_in(self):
self.snat_add_address(self.snat_addr)
self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr,
- self.tcp_port_in, self.tcp_port_out)
+ self.tcp_port_in, self.tcp_port_out,
+ proto=IP_PROTOS.tcp)
self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr,
- self.udp_port_in, self.udp_port_out)
+ self.udp_port_in, self.udp_port_out,
+ proto=IP_PROTOS.udp)
self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr,
- self.icmp_id_in, self.icmp_id_out)
+ self.icmp_id_in, self.icmp_id_out,
+ proto=IP_PROTOS.icmp)
self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture()
+ capture = self.pg1.get_capture(len(pkts))
self.verify_capture_out(capture)
# out2in
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture()
+ capture = self.pg0.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg0)
def test_static_with_port_out(self):
self.snat_add_address(self.snat_addr)
self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr,
- self.tcp_port_in, self.tcp_port_out)
+ self.tcp_port_in, self.tcp_port_out,
+ proto=IP_PROTOS.tcp)
self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr,
- self.udp_port_in, self.udp_port_out)
+ self.udp_port_in, self.udp_port_out,
+ proto=IP_PROTOS.udp)
self.snat_add_static_mapping(self.pg0.remote_ip4, self.snat_addr,
- self.icmp_id_in, self.icmp_id_out)
+ self.icmp_id_in, self.icmp_id_out,
+ proto=IP_PROTOS.icmp)
self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture()
+ capture = self.pg0.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg0)
# in2out
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture()
+ capture = self.pg1.get_capture(len(pkts))
self.verify_capture_out(capture)
def test_static_vrf_aware(self):
self.icmp_id_out = 6305
self.snat_add_static_mapping(self.pg4.remote_ip4, nat_ip1,
- vrf_id=self.pg4.sw_if_index)
+ vrf_id=10)
self.snat_add_static_mapping(self.pg0.remote_ip4, nat_ip2,
- vrf_id=self.pg4.sw_if_index)
+ vrf_id=10)
self.vapi.snat_interface_add_del_feature(self.pg3.sw_if_index,
is_inside=0)
self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
self.pg4.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg3.get_capture()
+ capture = self.pg3.get_capture(len(pkts))
self.verify_capture_out(capture, nat_ip1, True)
# inside interface VRF don't match SNAT static mapping VRF (packets
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg3.get_capture()
- self.verify_capture_out(capture, packet_num=0)
+ self.pg3.assert_nothing_captured()
def test_multiple_inside_interfaces(self):
- """ SNAT multiple inside interfaces with non-overlapping address space """
+ """ SNAT multiple inside interfaces (non-overlapping address space) """
self.snat_add_address(self.snat_addr)
self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index)
- self.vapi.snat_interface_add_del_feature(self.pg2.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg3.sw_if_index,
is_inside=0)
+ # between two S-NAT inside interfaces (no translation)
+ 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_no_translation(capture, self.pg0, self.pg1)
+
+ # from S-NAT inside to interface without S-NAT feature (no translation)
+ pkts = self.create_stream_in(self.pg0, self.pg2)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg2.get_capture(len(pkts))
+ self.verify_capture_no_translation(capture, self.pg0, self.pg2)
+
# in2out 1st interface
pkts = self.create_stream_in(self.pg0, self.pg3)
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg3.get_capture()
+ capture = self.pg3.get_capture(len(pkts))
self.verify_capture_out(capture)
# out2in 1st interface
self.pg3.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture()
+ capture = self.pg0.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg0)
# in2out 2nd interface
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg3.get_capture()
+ capture = self.pg3.get_capture(len(pkts))
self.verify_capture_out(capture)
# out2in 2nd interface
self.pg3.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture()
+ capture = self.pg1.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg1)
- # in2out 3rd interface
- pkts = self.create_stream_in(self.pg2, self.pg3)
- self.pg2.add_stream(pkts)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.pg3.get_capture()
- self.verify_capture_out(capture)
-
- # out2in 3rd interface
- pkts = self.create_stream_out(self.pg3)
- self.pg3.add_stream(pkts)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.pg2.get_capture()
- self.verify_capture_in(capture, self.pg2)
-
def test_inside_overlapping_interfaces(self):
""" SNAT multiple inside interfaces with overlapping address space """
+ static_nat_ip = "10.0.0.10"
self.snat_add_address(self.snat_addr)
self.vapi.snat_interface_add_del_feature(self.pg3.sw_if_index,
is_inside=0)
self.vapi.snat_interface_add_del_feature(self.pg4.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg5.sw_if_index)
self.vapi.snat_interface_add_del_feature(self.pg6.sw_if_index)
+ self.snat_add_static_mapping(self.pg6.remote_ip4, static_nat_ip,
+ vrf_id=20)
+
+ # between S-NAT inside interfaces with same VRF (no translation)
+ pkts = self.create_stream_in(self.pg4, self.pg5)
+ self.pg4.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg5.get_capture(len(pkts))
+ self.verify_capture_no_translation(capture, self.pg4, self.pg5)
+
+ # between S-NAT inside interfaces with different VRF (hairpinning)
+ p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
+ IP(src=self.pg4.remote_ip4, dst=static_nat_ip) /
+ TCP(sport=1234, dport=5678))
+ self.pg4.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg6.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.snat_addr)
+ self.assertEqual(ip.dst, self.pg6.remote_ip4)
+ self.assertNotEqual(tcp.sport, 1234)
+ self.assertEqual(tcp.dport, 5678)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
# in2out 1st interface
pkts = self.create_stream_in(self.pg4, self.pg3)
self.pg4.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg3.get_capture()
+ capture = self.pg3.get_capture(len(pkts))
self.verify_capture_out(capture)
# out2in 1st interface
self.pg3.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg4.get_capture()
+ capture = self.pg4.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg4)
# in2out 2nd interface
self.pg5.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg3.get_capture()
+ capture = self.pg3.get_capture(len(pkts))
self.verify_capture_out(capture)
# out2in 2nd interface
self.pg3.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg5.get_capture()
+ capture = self.pg5.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg5)
# in2out 3rd interface
self.pg6.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg3.get_capture()
- self.verify_capture_out(capture)
+ capture = self.pg3.get_capture(len(pkts))
+ self.verify_capture_out(capture, static_nat_ip, True)
# out2in 3rd interface
- pkts = self.create_stream_out(self.pg3)
+ pkts = self.create_stream_out(self.pg3, static_nat_ip)
self.pg3.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg6.get_capture()
+ capture = self.pg6.get_capture(len(pkts))
self.verify_capture_in(capture, self.pg6)
+ def test_hairpinning(self):
+ """ SNAT hairpinning """
+
+ host = self.pg0.remote_hosts[0]
+ server = self.pg0.remote_hosts[1]
+ host_in_port = 1234
+ host_out_port = 0
+ server_in_port = 5678
+ server_out_port = 8765
+
+ self.snat_add_address(self.snat_addr)
+ self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ # add static mapping for server
+ self.snat_add_static_mapping(server.ip4, self.snat_addr,
+ server_in_port, server_out_port,
+ proto=IP_PROTOS.tcp)
+
+ # send packet from host to server
+ p = (Ether(src=host.mac, dst=self.pg0.local_mac) /
+ IP(src=host.ip4, dst=self.snat_addr) /
+ TCP(sport=host_in_port, dport=server_out_port))
+ self.pg0.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.snat_addr)
+ self.assertEqual(ip.dst, server.ip4)
+ self.assertNotEqual(tcp.sport, host_in_port)
+ self.assertEqual(tcp.dport, server_in_port)
+ host_out_port = tcp.sport
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # send reply from server to host
+ p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
+ IP(src=server.ip4, dst=self.snat_addr) /
+ TCP(sport=server_in_port, dport=host_out_port))
+ self.pg0.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.snat_addr)
+ self.assertEqual(ip.dst, host.ip4)
+ self.assertEqual(tcp.sport, server_out_port)
+ self.assertEqual(tcp.dport, host_in_port)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:"), p)
+ raise
+
+ def test_max_translations_per_user(self):
+ """ MAX translations per user - recycle the least recently used """
+
+ self.snat_add_address(self.snat_addr)
+ self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # get maximum number of translations per user
+ snat_config = self.vapi.snat_show_config()
+
+ # send more than maximum number of translations per user packets
+ pkts_num = snat_config.max_translations_per_user + 5
+ pkts = []
+ for port in range(0, pkts_num):
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=1025 + port))
+ pkts.append(p)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # verify number of translated packet
+ self.pg1.get_capture(pkts_num)
+
+ def test_interface_addr(self):
+ """ Acquire SNAT addresses from interface """
+ self.vapi.snat_add_interface_addr(self.pg7.sw_if_index)
+
+ # no address in NAT pool
+ adresses = self.vapi.snat_address_dump()
+ self.assertEqual(0, len(adresses))
+
+ # configure interface address and check NAT address pool
+ self.pg7.config_ip4()
+ adresses = self.vapi.snat_address_dump()
+ self.assertEqual(1, len(adresses))
+ self.assertEqual(adresses[0].ip_address[0:4], self.pg7.local_ip4n)
+
+ # remove interface address and check NAT address pool
+ self.pg7.unconfig_ip4()
+ adresses = self.vapi.snat_address_dump()
+ self.assertEqual(0, len(adresses))
+
+ def test_interface_addr_static_mapping(self):
+ """ Static mapping with addresses from interface """
+ self.vapi.snat_add_interface_addr(self.pg7.sw_if_index)
+ self.snat_add_static_mapping('1.2.3.4',
+ external_sw_if_index=self.pg7.sw_if_index)
+
+ # static mappings with external interface
+ static_mappings = self.vapi.snat_static_mapping_dump()
+ self.assertEqual(1, len(static_mappings))
+ self.assertEqual(self.pg7.sw_if_index,
+ static_mappings[0].external_sw_if_index)
+
+ # configure interface address and check static mappings
+ self.pg7.config_ip4()
+ static_mappings = self.vapi.snat_static_mapping_dump()
+ self.assertEqual(1, len(static_mappings))
+ self.assertEqual(static_mappings[0].external_ip_address[0:4],
+ self.pg7.local_ip4n)
+ self.assertEqual(0xFFFFFFFF, static_mappings[0].external_sw_if_index)
+
+ # remove interface address and check static mappings
+ self.pg7.unconfig_ip4()
+ static_mappings = self.vapi.snat_static_mapping_dump()
+ self.assertEqual(0, len(static_mappings))
+
+ def test_ipfix_nat44_sess(self):
+ """ S-NAT IPFIX logging NAT44 session created/delted """
+ self.snat_add_address(self.snat_addr)
+ self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n,
+ src_address=self.pg3.local_ip4n,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.snat_ipfix()
+
+ 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)
+ self.snat_add_address(self.snat_addr, is_add=0)
+ self.vapi.cli("ipfix flush") # FIXME this should be an API call
+ capture = self.pg3.get_capture(3)
+ 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_nat44_ses(data)
+
+ def test_ipfix_addr_exhausted(self):
+ """ S-NAT IPFIX logging NAT addresses exhausted """
+ self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n,
+ src_address=self.pg3.local_ip4n,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.snat_ipfix()
+
+ 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=3025))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(0)
+ self.vapi.cli("ipfix flush") # FIXME this should be an API call
+ capture = self.pg3.get_capture(3)
+ 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_addr_exhausted(data)
+
+ def test_pool_addr_fib(self):
+ """ S-NAT add pool addresses to FIB """
+ static_addr = '10.0.0.10'
+ self.snat_add_address(self.snat_addr)
+ self.vapi.snat_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.snat_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.snat_add_static_mapping(self.pg0.remote_ip4, static_addr)
+
+ # SNAT address
+ p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') /
+ ARP(op=ARP.who_has, pdst=self.snat_addr,
+ psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ self.assertTrue(capture[0].haslayer(ARP))
+ self.assertTrue(capture[0][ARP].op, ARP.is_at)
+
+ # 1:1 NAT address
+ p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') /
+ ARP(op=ARP.who_has, pdst=static_addr,
+ psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ self.assertTrue(capture[0].haslayer(ARP))
+ self.assertTrue(capture[0][ARP].op, ARP.is_at)
+
+ # send ARP to non-SNAT interface
+ p = (Ether(src=self.pg2.remote_mac, dst='ff:ff:ff:ff:ff:ff') /
+ ARP(op=ARP.who_has, pdst=self.snat_addr,
+ psrc=self.pg2.remote_ip4, hwsrc=self.pg2.remote_mac))
+ self.pg2.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(0)
+
+ # remove addresses and verify
+ self.snat_add_address(self.snat_addr, is_add=0)
+ self.snat_add_static_mapping(self.pg0.remote_ip4, static_addr,
+ is_add=0)
+
+ p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') /
+ ARP(op=ARP.who_has, pdst=self.snat_addr,
+ psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(0)
+
+ p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') /
+ ARP(op=ARP.who_has, pdst=static_addr,
+ psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(0)
+
def tearDown(self):
super(TestSNAT, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.cli("show snat verbose"))
self.clear_snat()
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff