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authorMatus Fabian <matfabia@cisco.com>2017-08-21 07:05:03 -0700
committerOle Trøan <otroan@employees.org>2017-08-23 07:42:10 +0000
commit2ba92e32e0197f676dd905e5edcb4ff3e1bec241 (patch)
tree4d5eba20eda422bde4e9218834e1b8662a43b001 /test/test_nat.py
parentcfc997ef3da9f406afe5caad99fc98a53aab7a77 (diff)
NAT: Rename snat plugin to nat (VPP-955)
Change-Id: I30a7e3da7a4efc6038a91e27b48045d4b07e2764 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'test/test_nat.py')
-rw-r--r--test/test_nat.py3720
1 files changed, 3720 insertions, 0 deletions
diff --git a/test/test_nat.py b/test/test_nat.py
new file mode 100644
index 00000000000..0d622b085e6
--- /dev/null
+++ b/test/test_nat.py
@@ -0,0 +1,3720 @@
+#!/usr/bin/env python
+
+import socket
+import unittest
+import struct
+
+from framework import VppTestCase, VppTestRunner, running_extended_tests
+from scapy.layers.inet import IP, TCP, UDP, ICMP
+from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror
+from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6EchoReply
+from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6
+from scapy.layers.l2 import Ether, ARP, GRE
+from scapy.data import IP_PROTOS
+from scapy.packet import bind_layers
+from util import ppp
+from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder
+from time import sleep
+
+
+class MethodHolder(VppTestCase):
+ """ NAT create capture and verify method holder """
+
+ @classmethod
+ def setUpClass(cls):
+ super(MethodHolder, cls).setUpClass()
+
+ def tearDown(self):
+ super(MethodHolder, self).tearDown()
+
+ def check_ip_checksum(self, pkt):
+ """
+ Check IP checksum of the packet
+
+ :param pkt: Packet to check IP checksum
+ """
+ new = pkt.__class__(str(pkt))
+ del new['IP'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['IP'].chksum, pkt['IP'].chksum)
+
+ def check_tcp_checksum(self, pkt):
+ """
+ Check TCP checksum in IP packet
+
+ :param pkt: Packet to check TCP checksum
+ """
+ new = pkt.__class__(str(pkt))
+ del new['TCP'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['TCP'].chksum, pkt['TCP'].chksum)
+
+ def check_udp_checksum(self, pkt):
+ """
+ Check UDP checksum in IP packet
+
+ :param pkt: Packet to check UDP checksum
+ """
+ new = pkt.__class__(str(pkt))
+ del new['UDP'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['UDP'].chksum, pkt['UDP'].chksum)
+
+ def check_icmp_errror_embedded(self, pkt):
+ """
+ Check ICMP error embeded packet checksum
+
+ :param pkt: Packet to check ICMP error embeded packet checksum
+ """
+ if pkt.haslayer(IPerror):
+ new = pkt.__class__(str(pkt))
+ del new['IPerror'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['IPerror'].chksum, pkt['IPerror'].chksum)
+
+ if pkt.haslayer(TCPerror):
+ new = pkt.__class__(str(pkt))
+ del new['TCPerror'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['TCPerror'].chksum, pkt['TCPerror'].chksum)
+
+ if pkt.haslayer(UDPerror):
+ if pkt['UDPerror'].chksum != 0:
+ new = pkt.__class__(str(pkt))
+ del new['UDPerror'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['UDPerror'].chksum,
+ pkt['UDPerror'].chksum)
+
+ if pkt.haslayer(ICMPerror):
+ del new['ICMPerror'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMPerror'].chksum, pkt['ICMPerror'].chksum)
+
+ def check_icmp_checksum(self, pkt):
+ """
+ Check ICMP checksum in IPv4 packet
+
+ :param pkt: Packet to check ICMP checksum
+ """
+ new = pkt.__class__(str(pkt))
+ del new['ICMP'].chksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMP'].chksum, pkt['ICMP'].chksum)
+ if pkt.haslayer(IPerror):
+ self.check_icmp_errror_embedded(pkt)
+
+ def check_icmpv6_checksum(self, pkt):
+ """
+ Check ICMPv6 checksum in IPv4 packet
+
+ :param pkt: Packet to check ICMPv6 checksum
+ """
+ new = pkt.__class__(str(pkt))
+ if pkt.haslayer(ICMPv6DestUnreach):
+ del new['ICMPv6DestUnreach'].cksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMPv6DestUnreach'].cksum,
+ pkt['ICMPv6DestUnreach'].cksum)
+ self.check_icmp_errror_embedded(pkt)
+ if pkt.haslayer(ICMPv6EchoRequest):
+ del new['ICMPv6EchoRequest'].cksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMPv6EchoRequest'].cksum,
+ pkt['ICMPv6EchoRequest'].cksum)
+ if pkt.haslayer(ICMPv6EchoReply):
+ del new['ICMPv6EchoReply'].cksum
+ new = new.__class__(str(new))
+ self.assertEqual(new['ICMPv6EchoReply'].cksum,
+ pkt['ICMPv6EchoReply'].cksum)
+
+ 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=20))
+ 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=20))
+ 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 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]
+ return socket.inet_ntop(socket.AF_INET6, ''.join(pref_n))
+
+ 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):
+ """
+ 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=20))
+ 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=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=self.icmp_id_out, type='echo-reply'))
+ pkts.append(p)
+
+ return pkts
+
+ def verify_capture_out(self, capture, nat_ip=None, same_port=False,
+ packet_num=3, dst_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: Sorce port number is not translated (Default False)
+ :param packet_num: Expected number of packets (Default 3)
+ :param dst_ip: Destination IP address (Default do not verify)
+ """
+ if nat_ip is None:
+ nat_ip = self.nat_addr
+ self.assertEqual(packet_num, len(capture))
+ for packet in capture:
+ try:
+ self.check_ip_checksum(packet)
+ self.assertEqual(packet[IP].src, nat_ip)
+ if dst_ip is not None:
+ self.assertEqual(packet[IP].dst, dst_ip)
+ if packet.haslayer(TCP):
+ 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.check_tcp_checksum(packet)
+ 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.udp_port_out = packet[UDP].sport
+ else:
+ if same_port:
+ self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ else:
+ self.assertNotEqual(packet[ICMP].id, self.icmp_id_in)
+ self.icmp_id_out = packet[ICMP].id
+ self.check_icmp_checksum(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(outside network):", packet))
+ raise
+
+ def verify_capture_in(self, capture, in_if, packet_num=3):
+ """
+ Verify captured packets on inside network
+
+ :param capture: Captured packets
+ :param in_if: Inside interface
+ :param packet_num: Expected number of packets (Default 3)
+ """
+ self.assertEqual(packet_num, len(capture))
+ for packet in capture:
+ try:
+ self.check_ip_checksum(packet)
+ self.assertEqual(packet[IP].dst, in_if.remote_ip4)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].dport, self.tcp_port_in)
+ self.check_tcp_checksum(packet)
+ elif packet.haslayer(UDP):
+ self.assertEqual(packet[UDP].dport, self.udp_port_in)
+ else:
+ self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ self.check_icmp_checksum(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(inside network):", packet))
+ raise
+
+ def verify_capture_in_ip6(self, capture, src_ip, dst_ip, packet_num=3):
+ """
+ Verify captured IPv6 packets on inside network
+
+ :param capture: Captured packets
+ :param src_ip: Source IP
+ :param dst_ip: Destination IP address
+ :param packet_num: Expected number of packets (Default 3)
+ """
+ self.assertEqual(packet_num, len(capture))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IPv6].src, src_ip)
+ self.assertEqual(packet[IPv6].dst, dst_ip)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].dport, self.tcp_port_in)
+ self.check_tcp_checksum(packet)
+ elif packet.haslayer(UDP):
+ self.assertEqual(packet[UDP].dport, self.udp_port_in)
+ self.check_udp_checksum(packet)
+ else:
+ self.assertEqual(packet[ICMPv6EchoReply].id,
+ self.icmp_id_in)
+ self.check_icmpv6_checksum(packet)
+ except:
+ 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_capture_out_with_icmp_errors(self, capture, src_ip=None,
+ packet_num=3, icmp_type=11):
+ """
+ Verify captured packets with ICMP errors on outside network
+
+ :param capture: Captured packets
+ :param src_ip: Translated IP address or IP address of VPP
+ (Default use global NAT address)
+ :param packet_num: Expected number of packets (Default 3)
+ :param icmp_type: Type of error ICMP packet
+ we are expecting (Default 11)
+ """
+ if src_ip is None:
+ src_ip = self.nat_addr
+ self.assertEqual(packet_num, len(capture))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IP].src, src_ip)
+ self.assertTrue(packet.haslayer(ICMP))
+ icmp = packet[ICMP]
+ self.assertEqual(icmp.type, icmp_type)
+ self.assertTrue(icmp.haslayer(IPerror))
+ inner_ip = icmp[IPerror]
+ if inner_ip.haslayer(TCPerror):
+ self.assertEqual(inner_ip[TCPerror].dport,
+ self.tcp_port_out)
+ elif inner_ip.haslayer(UDPerror):
+ self.assertEqual(inner_ip[UDPerror].dport,
+ self.udp_port_out)
+ else:
+ self.assertEqual(inner_ip[ICMPerror].id, self.icmp_id_out)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(outside network):", packet))
+ raise
+
+ def verify_capture_in_with_icmp_errors(self, capture, in_if, packet_num=3,
+ icmp_type=11):
+ """
+ Verify captured packets with ICMP errors on inside network
+
+ :param capture: Captured packets
+ :param in_if: Inside interface
+ :param packet_num: Expected number of packets (Default 3)
+ :param icmp_type: Type of error ICMP packet
+ we are expecting (Default 11)
+ """
+ self.assertEqual(packet_num, len(capture))
+ for packet in capture:
+ try:
+ self.assertEqual(packet[IP].dst, in_if.remote_ip4)
+ self.assertTrue(packet.haslayer(ICMP))
+ icmp = packet[ICMP]
+ self.assertEqual(icmp.type, icmp_type)
+ self.assertTrue(icmp.haslayer(IPerror))
+ inner_ip = icmp[IPerror]
+ if inner_ip.haslayer(TCPerror):
+ self.assertEqual(inner_ip[TCPerror].sport,
+ self.tcp_port_in)
+ elif inner_ip.haslayer(UDPerror):
+ self.assertEqual(inner_ip[UDPerror].sport,
+ self.udp_port_in)
+ else:
+ self.assertEqual(inner_ip[ICMPerror].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.nat_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])
+
+
+class TestNAT44(MethodHolder):
+ """ NAT44 Test Cases """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestNAT44, cls).setUpClass()
+
+ try:
+ 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.nat_addr = '10.0.0.3'
+ cls.ipfix_src_port = 4739
+ cls.ipfix_domain_id = 1
+
+ cls.create_pg_interfaces(range(9))
+ cls.interfaces = list(cls.pg_interfaces[0:4])
+
+ for i in cls.interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ cls.pg0.generate_remote_hosts(3)
+ 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 = "172.17.255.3"
+ cls.pg5._local_ip4n = socket.inet_pton(socket.AF_INET, i.local_ip4)
+ cls.pg5._remote_hosts[0]._ip4 = "172.17.255.4"
+ 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.config_ip4()
+ i.admin_up()
+ i.resolve_arp()
+
+ cls.pg7.admin_up()
+ cls.pg8.admin_up()
+
+ except Exception:
+ super(TestNAT44, cls).tearDownClass()
+ raise
+
+ def clear_nat44(self):
+ """
+ Clear NAT44 configuration.
+ """
+ # I found no elegant way to do this
+ self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg7.remote_ip4n,
+ next_hop_sw_if_index=self.pg7.sw_if_index,
+ is_add=0)
+ self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg8.remote_ip4n,
+ next_hop_sw_if_index=self.pg8.sw_if_index,
+ is_add=0)
+
+ for intf in [self.pg7, self.pg8]:
+ neighbors = self.vapi.ip_neighbor_dump(intf.sw_if_index)
+ for n in neighbors:
+ self.vapi.ip_neighbor_add_del(intf.sw_if_index,
+ n.mac_address,
+ n.ip_address,
+ is_add=0)
+
+ if self.pg7.has_ip4_config:
+ self.pg7.unconfig_ip4()
+
+ interfaces = self.vapi.nat44_interface_addr_dump()
+ for intf in interfaces:
+ self.vapi.nat44_add_interface_addr(intf.sw_if_index, is_add=0)
+
+ self.vapi.nat_ipfix(enable=0, src_port=self.ipfix_src_port,
+ domain_id=self.ipfix_domain_id)
+ self.ipfix_src_port = 4739
+ self.ipfix_domain_id = 1
+
+ interfaces = self.vapi.nat44_interface_dump()
+ for intf in interfaces:
+ self.vapi.nat44_interface_add_del_feature(intf.sw_if_index,
+ intf.is_inside,
+ is_add=0)
+
+ interfaces = self.vapi.nat44_interface_output_feature_dump()
+ for intf in interfaces:
+ self.vapi.nat44_interface_add_del_output_feature(intf.sw_if_index,
+ intf.is_inside,
+ is_add=0)
+
+ static_mappings = self.vapi.nat44_static_mapping_dump()
+ for sm in static_mappings:
+ self.vapi.nat44_add_del_static_mapping(
+ sm.local_ip_address,
+ sm.external_ip_address,
+ local_port=sm.local_port,
+ external_port=sm.external_port,
+ addr_only=sm.addr_only,
+ vrf_id=sm.vrf_id,
+ protocol=sm.protocol,
+ is_add=0)
+
+ adresses = self.vapi.nat44_address_dump()
+ for addr in adresses:
+ self.vapi.nat44_add_del_address_range(addr.ip_address,
+ addr.ip_address,
+ is_add=0)
+
+ def nat44_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 NAT44 static mapping
+
+ :param local_ip: Local IP address
+ :param external_ip: External IP address
+ :param local_port: Local port number (Optional)
+ :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.nat44_add_del_static_mapping(
+ l_ip,
+ e_ip,
+ external_sw_if_index,
+ local_port,
+ external_port,
+ addr_only,
+ vrf_id,
+ proto,
+ is_add)
+
+ def nat44_add_address(self, ip, is_add=1, vrf_id=0xFFFFFFFF):
+ """
+ Add/delete NAT44 address
+
+ :param ip: IP address
+ :param is_add: 1 if add, 0 if delete (Default add)
+ """
+ nat_addr = socket.inet_pton(socket.AF_INET, ip)
+ self.vapi.nat44_add_del_address_range(nat_addr, nat_addr, is_add,
+ vrf_id=vrf_id)
+
+ def test_dynamic(self):
+ """ NAT44 dynamic translation test """
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ 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)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg1)
+ 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)
+
+ def test_dynamic_icmp_errors_in2out_ttl_1(self):
+ """ NAT44 handling of client packets with TTL=1 """
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # Client side - generate traffic
+ pkts = self.create_stream_in(self.pg0, self.pg1, ttl=1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Client side - verify ICMP type 11 packets
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in_with_icmp_errors(capture, self.pg0)
+
+ def test_dynamic_icmp_errors_out2in_ttl_1(self):
+ """ NAT44 handling of server packets with TTL=1 """
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # Client side - create sessions
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Server side - generate traffic
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+ pkts = self.create_stream_out(self.pg1, ttl=1)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Server side - verify ICMP type 11 packets
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out_with_icmp_errors(capture,
+ src_ip=self.pg1.local_ip4)
+
+ def test_dynamic_icmp_errors_in2out_ttl_2(self):
+ """ NAT44 handling of error responses to client packets with TTL=2 """
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # Client side - generate traffic
+ pkts = self.create_stream_in(self.pg0, self.pg1, ttl=2)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Server side - simulate ICMP type 11 response
+ capture = self.pg1.get_capture(len(pkts))
+ pkts = [Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ ICMP(type=11) / packet[IP] for packet in capture]
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Client side - verify ICMP type 11 packets
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in_with_icmp_errors(capture, self.pg0)
+
+ def test_dynamic_icmp_errors_out2in_ttl_2(self):
+ """ NAT44 handling of error responses to server packets with TTL=2 """
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # Client side - create sessions
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Server side - generate traffic
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+ pkts = self.create_stream_out(self.pg1, ttl=2)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Client side - simulate ICMP type 11 response
+ capture = self.pg0.get_capture(len(pkts))
+ pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ ICMP(type=11) / packet[IP] for packet in capture]
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ # Server side - verify ICMP type 11 packets
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out_with_icmp_errors(capture)
+
+ def test_ping_out_interface_from_outside(self):
+ """ Ping NAT44 out interface from outside network """
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) /
+ ICMP(id=self.icmp_id_out, type='echo-request'))
+ pkts = [p]
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.assertEqual(1, len(capture))
+ packet = capture[0]
+ try:
+ self.assertEqual(packet[IP].src, self.pg1.local_ip4)
+ self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
+ self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ self.assertEqual(packet[ICMP].type, 0) # echo reply
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(outside network):", packet))
+ raise
+
+ def test_ping_internal_host_from_outside(self):
+ """ Ping internal host from outside network """
+
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # out2in
+ pkt = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr, ttl=64) /
+ ICMP(id=self.icmp_id_out, type='echo-request'))
+ self.pg1.add_stream(pkt)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ self.verify_capture_in(capture, self.pg0, packet_num=1)
+ self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp)
+
+ # in2out
+ pkt = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) /
+ ICMP(id=self.icmp_id_in, type='echo-reply'))
+ self.pg0.add_stream(pkt)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ self.verify_capture_out(capture, same_port=True, packet_num=1)
+ self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp)
+
+ def test_static_in(self):
+ """ 1:1 NAT initialized from inside network """
+
+ nat_ip = "10.0.0.10"
+ self.tcp_port_out = 6303
+ self.udp_port_out = 6304
+ self.icmp_id_out = 6305
+
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ 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, True)
+
+ # 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)
+
+ def test_static_out(self):
+ """ 1:1 NAT initialized from outside network """
+
+ nat_ip = "10.0.0.20"
+ self.tcp_port_out = 6303
+ self.udp_port_out = 6304
+ self.icmp_id_out = 6305
+
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # 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)
+
+ # 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, True)
+
+ def test_static_with_port_in(self):
+ """ 1:1 NAPT initialized from inside network """
+
+ self.tcp_port_out = 3606
+ self.udp_port_out = 3607
+ self.icmp_id_out = 3608
+
+ self.nat44_add_address(self.nat_addr)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
+ self.tcp_port_in, self.tcp_port_out,
+ proto=IP_PROTOS.tcp)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
+ self.udp_port_in, self.udp_port_out,
+ proto=IP_PROTOS.udp)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
+ self.icmp_id_in, self.icmp_id_out,
+ proto=IP_PROTOS.icmp)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ 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)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg1)
+ 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)
+
+ def test_static_with_port_out(self):
+ """ 1:1 NAPT initialized from outside network """
+
+ self.tcp_port_out = 30606
+ self.udp_port_out = 30607
+ self.icmp_id_out = 30608
+
+ self.nat44_add_address(self.nat_addr)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
+ self.tcp_port_in, self.tcp_port_out,
+ proto=IP_PROTOS.tcp)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
+ self.udp_port_in, self.udp_port_out,
+ proto=IP_PROTOS.udp)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
+ self.icmp_id_in, self.icmp_id_out,
+ proto=IP_PROTOS.icmp)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg1)
+ 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)
+
+ # 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)
+
+ def test_static_vrf_aware(self):
+ """ 1:1 NAT VRF awareness """
+
+ nat_ip1 = "10.0.0.30"
+ nat_ip2 = "10.0.0.40"
+ self.tcp_port_out = 6303
+ self.udp_port_out = 6304
+ self.icmp_id_out = 6305
+
+ self.nat44_add_static_mapping(self.pg4.remote_ip4, nat_ip1,
+ vrf_id=10)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip2,
+ vrf_id=10)
+ self.vapi.nat44_interface_add_del_feature(self.pg3.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg4.sw_if_index)
+
+ # inside interface VRF match NAT44 static mapping VRF
+ 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(len(pkts))
+ self.verify_capture_out(capture, nat_ip1, True)
+
+ # inside interface VRF don't match NAT44 static mapping VRF (packets
+ # are dropped)
+ pkts = self.create_stream_in(self.pg0, self.pg3)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg3.assert_nothing_captured()
+
+ def test_multiple_inside_interfaces(self):
+ """ NAT44 multiple non-overlapping address space inside interfaces """
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg3.sw_if_index,
+ is_inside=0)
+
+ # between two NAT44 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 NAT44 inside to interface without NAT44 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(len(pkts))
+ self.verify_capture_out(capture)
+
+ # out2in 1st 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.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+
+ # in2out 2nd interface
+ pkts = self.create_stream_in(self.pg1, self.pg3)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg3.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+
+ # out2in 2nd 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.pg1.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg1)
+
+ def test_inside_overlapping_interfaces(self):
+ """ NAT44 multiple inside interfaces with overlapping address space """
+
+ static_nat_ip = "10.0.0.10"
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg3.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_feature(self.pg4.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg5.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg6.sw_if_index)
+ self.nat44_add_static_mapping(self.pg6.remote_ip4, static_nat_ip,
+ vrf_id=20)
+
+ # between NAT44 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 NAT44 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.nat_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(len(pkts))
+ self.verify_capture_out(capture)
+
+ # out2in 1st 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.pg4.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg4)
+
+ # in2out 2nd interface
+ pkts = self.create_stream_in(self.pg5, self.pg3)
+ self.pg5.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg3.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+
+ # out2in 2nd 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.pg5.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg5)
+
+ # pg5 session dump
+ addresses = self.vapi.nat44_address_dump()
+ self.assertEqual(len(addresses), 1)
+ sessions = self.vapi.nat44_user_session_dump(self.pg5.remote_ip4n, 10)
+ self.assertEqual(len(sessions), 3)
+ for session in sessions:
+ self.assertFalse(session.is_static)
+ self.assertEqual(session.inside_ip_address[0:4],
+ self.pg5.remote_ip4n)
+ self.assertEqual(session.outside_ip_address,
+ addresses[0].ip_address)
+ self.assertEqual(sessions[0].protocol, IP_PROTOS.tcp)
+ self.assertEqual(sessions[1].protocol, IP_PROTOS.udp)
+ self.assertEqual(sessions[2].protocol, IP_PROTOS.icmp)
+ self.assertEqual(sessions[0].inside_port, self.tcp_port_in)
+ self.assertEqual(sessions[1].inside_port, self.udp_port_in)
+ self.assertEqual(sessions[2].inside_port, self.icmp_id_in)
+ self.assertEqual(sessions[0].outside_port, self.tcp_port_out)
+ self.assertEqual(sessions[1].outside_port, self.udp_port_out)
+ self.assertEqual(sessions[2].outside_port, self.icmp_id_out)
+
+ # in2out 3rd interface
+ pkts = self.create_stream_in(self.pg6, self.pg3)
+ self.pg6.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ 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, static_nat_ip)
+ self.pg3.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg6.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg6)
+
+ # general user and session dump verifications
+ users = self.vapi.nat44_user_dump()
+ self.assertTrue(len(users) >= 3)
+ addresses = self.vapi.nat44_address_dump()
+ self.assertEqual(len(addresses), 1)
+ for user in users:
+ sessions = self.vapi.nat44_user_session_dump(user.ip_address,
+ user.vrf_id)
+ for session in sessions:
+ self.assertEqual(user.ip_address, session.inside_ip_address)
+ self.assertTrue(session.total_bytes > session.total_pkts > 0)
+ self.assertTrue(session.protocol in
+ [IP_PROTOS.tcp, IP_PROTOS.udp,
+ IP_PROTOS.icmp])
+
+ # pg4 session dump
+ sessions = self.vapi.nat44_user_session_dump(self.pg4.remote_ip4n, 10)
+ self.assertTrue(len(sessions) >= 4)
+ for session in sessions:
+ self.assertFalse(session.is_static)
+ self.assertEqual(session.inside_ip_address[0:4],
+ self.pg4.remote_ip4n)
+ self.assertEqual(session.outside_ip_address,
+ addresses[0].ip_address)
+
+ # pg6 session dump
+ sessions = self.vapi.nat44_user_session_dump(self.pg6.remote_ip4n, 20)
+ self.assertTrue(len(sessions) >= 3)
+ for session in sessions:
+ self.assertTrue(session.is_static)
+ self.assertEqual(session.inside_ip_address[0:4],
+ self.pg6.remote_ip4n)
+ self.assertEqual(map(ord, session.outside_ip_address[0:4]),
+ map(int, static_nat_ip.split('.')))
+ self.assertTrue(session.inside_port in
+ [self.tcp_port_in, self.udp_port_in,
+ self.icmp_id_in])
+
+ def test_hairpinning(self):
+ """ NAT44 hairpinning - 1:1 NAPT """
+
+ 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.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ # add static mapping for server
+ self.nat44_add_static_mapping(server.ip4, self.nat_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.nat_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.nat_addr)
+ self.assertEqual(ip.dst, server.ip4)
+ self.assertNotEqual(tcp.sport, host_in_port)
+ self.assertEqual(tcp.dport, server_in_port)
+ self.check_tcp_checksum(p)
+ 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.nat_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.nat_addr)
+ self.assertEqual(ip.dst, host.ip4)
+ self.assertEqual(tcp.sport, server_out_port)
+ self.assertEqual(tcp.dport, host_in_port)
+ self.check_tcp_checksum(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:"), p)
+ raise
+
+ def test_hairpinning2(self):
+ """ NAT44 hairpinning - 1:1 NAT"""
+
+ server1_nat_ip = "10.0.0.10"
+ server2_nat_ip = "10.0.0.11"
+ host = self.pg0.remote_hosts[0]
+ server1 = self.pg0.remote_hosts[1]
+ server2 = self.pg0.remote_hosts[2]
+ server_tcp_port = 22
+ server_udp_port = 20
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # add static mapping for servers
+ self.nat44_add_static_mapping(server1.ip4, server1_nat_ip)
+ self.nat44_add_static_mapping(server2.ip4, server2_nat_ip)
+
+ # host to server1
+ pkts = []
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=host.ip4, dst=server1_nat_ip) /
+ TCP(sport=self.tcp_port_in, dport=server_tcp_port))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=host.ip4, dst=server1_nat_ip) /
+ UDP(sport=self.udp_port_in, dport=server_udp_port))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=host.ip4, dst=server1_nat_ip) /
+ ICMP(id=self.icmp_id_in, type='echo-request'))
+ 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[IP].src, self.nat_addr)
+ self.assertEqual(packet[IP].dst, server1.ip4)
+ if packet.haslayer(TCP):
+ self.assertNotEqual(packet[TCP].sport, self.tcp_port_in)
+ self.assertEqual(packet[TCP].dport, server_tcp_port)
+ self.tcp_port_out = packet[TCP].sport
+ self.check_tcp_checksum(packet)
+ elif packet.haslayer(UDP):
+ self.assertNotEqual(packet[UDP].sport, self.udp_port_in)
+ self.assertEqual(packet[UDP].dport, server_udp_port)
+ self.udp_port_out = packet[UDP].sport
+ else:
+ self.assertNotEqual(packet[ICMP].id, self.icmp_id_in)
+ self.icmp_id_out = packet[ICMP].id
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # server1 to host
+ pkts = []
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=server1.ip4, dst=self.nat_addr) /
+ TCP(sport=server_tcp_port, dport=self.tcp_port_out))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=server1.ip4, dst=self.nat_addr) /
+ UDP(sport=server_udp_port, dport=self.udp_port_out))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=server1.ip4, dst=self.nat_addr) /
+ ICMP(id=self.icmp_id_out, type='echo-reply'))
+ 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[IP].src, server1_nat_ip)
+ self.assertEqual(packet[IP].dst, host.ip4)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].dport, self.tcp_port_in)
+ self.assertEqual(packet[TCP].sport, server_tcp_port)
+ self.check_tcp_checksum(packet)
+ elif packet.haslayer(UDP):
+ self.assertEqual(packet[UDP].dport, self.udp_port_in)
+ self.assertEqual(packet[UDP].sport, server_udp_port)
+ else:
+ self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # server2 to server1
+ pkts = []
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=server2.ip4, dst=server1_nat_ip) /
+ TCP(sport=self.tcp_port_in, dport=server_tcp_port))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=server2.ip4, dst=server1_nat_ip) /
+ UDP(sport=self.udp_port_in, dport=server_udp_port))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=server2.ip4, dst=server1_nat_ip) /
+ ICMP(id=self.icmp_id_in, type='echo-request'))
+ 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[IP].src, server2_nat_ip)
+ self.assertEqual(packet[IP].dst, server1.ip4)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].sport, self.tcp_port_in)
+ self.assertEqual(packet[TCP].dport, server_tcp_port)
+ self.tcp_port_out = packet[TCP].sport
+ self.check_tcp_checksum(packet)
+ elif packet.haslayer(UDP):
+ self.assertEqual(packet[UDP].sport, self.udp_port_in)
+ self.assertEqual(packet[UDP].dport, server_udp_port)
+ self.udp_port_out = packet[UDP].sport
+ else:
+ self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ self.icmp_id_out = packet[ICMP].id
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # server1 to server2
+ pkts = []
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=server1.ip4, dst=server2_nat_ip) /
+ TCP(sport=server_tcp_port, dport=self.tcp_port_out))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=server1.ip4, dst=server2_nat_ip) /
+ UDP(sport=server_udp_port, dport=self.udp_port_out))
+ pkts.append(p)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=server1.ip4, dst=server2_nat_ip) /
+ ICMP(id=self.icmp_id_out, type='echo-reply'))
+ 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[IP].src, server1_nat_ip)
+ self.assertEqual(packet[IP].dst, server2.ip4)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].dport, self.tcp_port_in)
+ self.assertEqual(packet[TCP].sport, server_tcp_port)
+ self.check_tcp_checksum(packet)
+ elif packet.haslayer(UDP):
+ self.assertEqual(packet[UDP].dport, self.udp_port_in)
+ self.assertEqual(packet[UDP].sport, server_udp_port)
+ else:
+ self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_max_translations_per_user(self):
+ """ MAX translations per user - recycle the least recently used """
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # get maximum number of translations per user
+ nat44_config = self.vapi.nat_show_config()
+
+ # send more than maximum number of translations per user packets
+ pkts_num = nat44_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 NAT44 addresses from interface """
+ self.vapi.nat44_add_interface_addr(self.pg7.sw_if_index)
+
+ # no address in NAT pool
+ adresses = self.vapi.nat44_address_dump()
+ self.assertEqual(0, len(adresses))
+
+ # configure interface address and check NAT address pool
+ self.pg7.config_ip4()
+ adresses = self.vapi.nat44_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.nat44_address_dump()
+ self.assertEqual(0, len(adresses))
+
+ def test_interface_addr_static_mapping(self):
+ """ Static mapping with addresses from interface """
+ self.vapi.nat44_add_interface_addr(self.pg7.sw_if_index)
+ self.nat44_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.nat44_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.nat44_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.nat44_static_mapping_dump()
+ self.assertEqual(0, len(static_mappings))
+
+ def test_ipfix_nat44_sess(self):
+ """ IPFIX logging NAT44 session created/delted """
+ self.ipfix_domain_id = 10
+ self.ipfix_src_port = 20202
+ colector_port = 30303
+ bind_layers(UDP, IPFIX, dport=30303)
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_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,
+ collector_port=colector_port)
+ self.vapi.nat_ipfix(domain_id=self.ipfix_domain_id,
+ src_port=self.ipfix_src_port)
+
+ 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.nat44_add_address(self.nat_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))
+ 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, colector_port)
+ 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_nat44_ses(data)
+
+ def test_ipfix_addr_exhausted(self):
+ """ IPFIX logging NAT addresses exhausted """
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_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.nat_ipfix(domain_id=self.ipfix_domain_id,
+ src_port=self.ipfix_src_port)
+
+ 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))
+ 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_addr_exhausted(data)
+
+ def test_pool_addr_fib(self):
+ """ NAT44 add pool addresses to FIB """
+ static_addr = '10.0.0.10'
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, static_addr)
+
+ # NAT44 address
+ p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') /
+ ARP(op=ARP.who_has, pdst=self.nat_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-NAT44 interface
+ p = (Ether(src=self.pg2.remote_mac, dst='ff:ff:ff:ff:ff:ff') /
+ ARP(op=ARP.who_has, pdst=self.nat_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.nat44_add_address(self.nat_addr, is_add=0)
+ self.nat44_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.nat_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 test_vrf_mode(self):
+ """ NAT44 tenant VRF aware address pool mode """
+
+ vrf_id1 = 1
+ vrf_id2 = 2
+ nat_ip1 = "10.0.0.10"
+ nat_ip2 = "10.0.0.11"
+
+ self.pg0.unconfig_ip4()
+ self.pg1.unconfig_ip4()
+ self.pg0.set_table_ip4(vrf_id1)
+ self.pg1.set_table_ip4(vrf_id2)
+ self.pg0.config_ip4()
+ self.pg1.config_ip4()
+
+ self.nat44_add_address(nat_ip1, vrf_id=vrf_id1)
+ self.nat44_add_address(nat_ip2, vrf_id=vrf_id2)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg2.sw_if_index,
+ is_inside=0)
+
+ # first VRF
+ 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_out(capture, nat_ip1)
+
+ # second VRF
+ pkts = self.create_stream_in(self.pg1, self.pg2)
+ 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_out(capture, nat_ip2)
+
+ def test_vrf_feature_independent(self):
+ """ NAT44 tenant VRF independent address pool mode """
+
+ nat_ip1 = "10.0.0.10"
+ nat_ip2 = "10.0.0.11"
+
+ self.nat44_add_address(nat_ip1)
+ self.nat44_add_address(nat_ip2)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg2.sw_if_index,
+ is_inside=0)
+
+ # first VRF
+ 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_out(capture, nat_ip1)
+
+ # second VRF
+ pkts = self.create_stream_in(self.pg1, self.pg2)
+ 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_out(capture, nat_ip1)
+
+ def test_dynamic_ipless_interfaces(self):
+ """ NAT44 interfaces without configured IP address """
+
+ self.vapi.ip_neighbor_add_del(self.pg7.sw_if_index,
+ self.pg7.remote_mac,
+ self.pg7.remote_ip4n,
+ is_static=1)
+ self.vapi.ip_neighbor_add_del(self.pg8.sw_if_index,
+ self.pg8.remote_mac,
+ self.pg8.remote_ip4n,
+ is_static=1)
+
+ self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg7.remote_ip4n,
+ next_hop_sw_if_index=self.pg7.sw_if_index)
+ self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg8.remote_ip4n,
+ next_hop_sw_if_index=self.pg8.sw_if_index)
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg7.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg8.sw_if_index,
+ is_inside=0)
+
+ # in2out
+ pkts = self.create_stream_in(self.pg7, self.pg8)
+ self.pg7.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg8.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg8, self.nat_addr)
+ self.pg8.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg7.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg7)
+
+ def test_static_ipless_interfaces(self):
+ """ NAT44 interfaces without configured IP address - 1:1 NAT """
+
+ self.vapi.ip_neighbor_add_del(self.pg7.sw_if_index,
+ self.pg7.remote_mac,
+ self.pg7.remote_ip4n,
+ is_static=1)
+ self.vapi.ip_neighbor_add_del(self.pg8.sw_if_index,
+ self.pg8.remote_mac,
+ self.pg8.remote_ip4n,
+ is_static=1)
+
+ self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg7.remote_ip4n,
+ next_hop_sw_if_index=self.pg7.sw_if_index)
+ self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg8.remote_ip4n,
+ next_hop_sw_if_index=self.pg8.sw_if_index)
+
+ self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg7.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg8.sw_if_index,
+ is_inside=0)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg8)
+ self.pg8.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg7.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg7)
+
+ # in2out
+ pkts = self.create_stream_in(self.pg7, self.pg8)
+ self.pg7.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg8.get_capture(len(pkts))
+ self.verify_capture_out(capture, self.nat_addr, True)
+
+ def test_static_with_port_ipless_interfaces(self):
+ """ NAT44 interfaces without configured IP address - 1:1 NAPT """
+
+ self.tcp_port_out = 30606
+ self.udp_port_out = 30607
+ self.icmp_id_out = 30608
+
+ self.vapi.ip_neighbor_add_del(self.pg7.sw_if_index,
+ self.pg7.remote_mac,
+ self.pg7.remote_ip4n,
+ is_static=1)
+ self.vapi.ip_neighbor_add_del(self.pg8.sw_if_index,
+ self.pg8.remote_mac,
+ self.pg8.remote_ip4n,
+ is_static=1)
+
+ self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg7.remote_ip4n,
+ next_hop_sw_if_index=self.pg7.sw_if_index)
+ self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg8.remote_ip4n,
+ next_hop_sw_if_index=self.pg8.sw_if_index)
+
+ self.nat44_add_address(self.nat_addr)
+ self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr,
+ self.tcp_port_in, self.tcp_port_out,
+ proto=IP_PROTOS.tcp)
+ self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr,
+ self.udp_port_in, self.udp_port_out,
+ proto=IP_PROTOS.udp)
+ self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr,
+ self.icmp_id_in, self.icmp_id_out,
+ proto=IP_PROTOS.icmp)
+ self.vapi.nat44_interface_add_del_feature(self.pg7.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg8.sw_if_index,
+ is_inside=0)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg8)
+ self.pg8.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg7.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg7)
+
+ # in2out
+ pkts = self.create_stream_in(self.pg7, self.pg8)
+ self.pg7.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg8.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+
+ def test_static_unknown_proto(self):
+ """ 1:1 NAT translate packet with unknown protocol """
+ nat_ip = "10.0.0.10"
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # in2out
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg3.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, nat_ip)
+ self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.check_ip_checksum(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=nat_ip) /
+ GRE() /
+ IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_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[IP].src, self.pg1.remote_ip4)
+ self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.check_ip_checksum(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_hairpinning_static_unknown_proto(self):
+ """ 1:1 NAT translate packet with unknown protocol - hairpinning """
+
+ host = self.pg0.remote_hosts[0]
+ server = self.pg0.remote_hosts[1]
+
+ host_nat_ip = "10.0.0.10"
+ server_nat_ip = "10.0.0.11"
+
+ self.nat44_add_static_mapping(host.ip4, host_nat_ip)
+ self.nat44_add_static_mapping(server.ip4, server_nat_ip)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # host to server
+ p = (Ether(dst=self.pg0.local_mac, src=host.mac) /
+ IP(src=host.ip4, dst=server_nat_ip) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg3.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[IP].src, host_nat_ip)
+ self.assertEqual(packet[IP].dst, server.ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.check_ip_checksum(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # server to host
+ p = (Ether(dst=self.pg0.local_mac, src=server.mac) /
+ IP(src=server.ip4, dst=host_nat_ip) /
+ GRE() /
+ IP(src=self.pg3.remote_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[IP].src, server_nat_ip)
+ self.assertEqual(packet[IP].dst, host.ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.check_ip_checksum(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_unknown_proto(self):
+ """ NAT44 translate packet with unknown protocol """
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # in2out
+ 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=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) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg3.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.assertTrue(packet.haslayer(GRE))
+ self.check_ip_checksum(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.pg3.remote_ip4, dst=self.pg2.remote_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[IP].src, self.pg1.remote_ip4)
+ self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.check_ip_checksum(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_hairpinning_unknown_proto(self):
+ """ NAT44 translate packet with unknown protocol - 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
+ server_nat_ip = "10.0.0.11"
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # add static mapping for server
+ self.nat44_add_static_mapping(server.ip4, server_nat_ip)
+
+ # host to server
+ p = (Ether(src=host.mac, dst=self.pg0.local_mac) /
+ IP(src=host.ip4, dst=server_nat_ip) /
+ 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 = (Ether(dst=self.pg0.local_mac, src=host.mac) /
+ IP(src=host.ip4, dst=server_nat_ip) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg3.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[IP].src, self.nat_addr)
+ self.assertEqual(packet[IP].dst, server.ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.check_ip_checksum(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # server to host
+ p = (Ether(dst=self.pg0.local_mac, src=server.mac) /
+ IP(src=server.ip4, dst=self.nat_addr) /
+ GRE() /
+ IP(src=self.pg3.remote_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[IP].src, server_nat_ip)
+ self.assertEqual(packet[IP].dst, host.ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.check_ip_checksum(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_output_feature(self):
+ """ NAT44 interface output feature (in2out postrouting) """
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index,
+ 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)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg1)
+ 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)
+
+ def test_output_feature_vrf_aware(self):
+ """ NAT44 interface output feature VRF aware (in2out postrouting) """
+ nat_ip_vrf10 = "10.0.0.10"
+ nat_ip_vrf20 = "10.0.0.20"
+
+ self.vapi.ip_add_del_route(dst_address=self.pg3.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg3.remote_ip4n,
+ next_hop_sw_if_index=self.pg3.sw_if_index,
+ table_id=10)
+ self.vapi.ip_add_del_route(dst_address=self.pg3.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg3.remote_ip4n,
+ next_hop_sw_if_index=self.pg3.sw_if_index,
+ table_id=20)
+
+ self.nat44_add_address(nat_ip_vrf10, vrf_id=10)
+ self.nat44_add_address(nat_ip_vrf20, vrf_id=20)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg4.sw_if_index)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg6.sw_if_index)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg3.sw_if_index,
+ is_inside=0)
+
+ # in2out VRF 10
+ 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(len(pkts))
+ self.verify_capture_out(capture, nat_ip=nat_ip_vrf10)
+
+ # out2in VRF 10
+ pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf10)
+ self.pg3.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg4.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg4)
+
+ # in2out VRF 20
+ pkts = self.create_stream_in(self.pg6, self.pg3)
+ self.pg6.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg3.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=nat_ip_vrf20)
+
+ # out2in VRF 20
+ pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf20)
+ self.pg3.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg6.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg6)
+
+ def test_output_feature_hairpinning(self):
+ """ NAT44 interface output feature hairpinning (in2out postrouting) """
+ 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.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # add static mapping for server
+ self.nat44_add_static_mapping(server.ip4, self.nat_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.nat_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.nat_addr)
+ self.assertEqual(ip.dst, server.ip4)
+ self.assertNotEqual(tcp.sport, host_in_port)
+ self.assertEqual(tcp.dport, server_in_port)
+ self.check_tcp_checksum(p)
+ 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.nat_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.nat_addr)
+ self.assertEqual(ip.dst, host.ip4)
+ self.assertEqual(tcp.sport, server_out_port)
+ self.assertEqual(tcp.dport, host_in_port)
+ self.check_tcp_checksum(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:"), p)
+ raise
+
+ def tearDown(self):
+ super(TestNAT44, self).tearDown()
+ if not self.vpp_dead:
+ self.logger.info(self.vapi.cli("show nat44 verbose"))
+ self.clear_nat44()
+
+
+class TestDeterministicNAT(MethodHolder):
+ """ Deterministic NAT Test Cases """
+
+ @classmethod
+ def setUpConstants(cls):
+ super(TestDeterministicNAT, cls).setUpConstants()
+ cls.vpp_cmdline.extend(["nat", "{", "deterministic", "}"])
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestDeterministicNAT, cls).setUpClass()
+
+ try:
+ 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()
+
+ except Exception:
+ super(TestDeterministicNAT, cls).tearDownClass()
+ raise
+
+ 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, packet_num=3):
+ """
+ Verify captured packets on outside network
+
+ :param capture: Captured packets
+ :param nat_ip: Translated IP address (Default use global NAT address)
+ :param same_port: Sorce port number is not translated (Default False)
+ :param packet_num: Expected number of packets (Default 3)
+ """
+ if nat_ip is None:
+ nat_ip = self.nat_addr
+ self.assertEqual(packet_num, len(capture))
+ 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 initiate_tcp_session(self, in_if, out_if):
+ """
+ Initiates TCP session
+
+ :param in_if: Inside interface
+ :param out_if: Outside interface
+ """
+ try:
+ # 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)
+
+ except:
+ self.logger.error("TCP 3 way handshake failed")
+ raise
+
+ def verify_ipfix_max_entries_per_user(self, data):
+ """
+ Verify IPFIX maximum entries per user exceeded event
+
+ :param data: Decoded IPFIX data records
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ self.assertEqual(ord(record[230]), 13)
+ # natQuotaExceededEvent
+ self.assertEqual('\x03\x00\x00\x00', record[466])
+ # sourceIPv4Address
+ self.assertEqual(self.pg0.remote_ip4n, record[8])
+
+ 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_addr_n = socket.inet_aton(in_addr)
+ out_addr_n = socket.inet_aton(out_addr)
+ in_addr_t_n = socket.inet_aton(in_addr_t)
+ in_plen = 24
+ out_plen = 32
+
+ nat_config = self.vapi.nat_show_config()
+ self.assertEqual(1, nat_config.deterministic)
+
+ self.vapi.nat_det_add_del_map(in_addr_n, in_plen, out_addr_n, out_plen)
+
+ rep1 = self.vapi.nat_det_forward(in_addr_t_n)
+ self.assertEqual(rep1.out_addr[:4], out_addr_n)
+ rep2 = self.vapi.nat_det_reverse(out_addr_n, rep1.out_port_hi)
+ self.assertEqual(rep2.in_addr[:4], in_addr_t_n)
+
+ deterministic_mappings = self.vapi.nat_det_map_dump()
+ self.assertEqual(len(deterministic_mappings), 1)
+ dsm = deterministic_mappings[0]
+ self.assertEqual(in_addr_n, dsm.in_addr[:4])
+ self.assertEqual(in_plen, dsm.in_plen)
+ self.assertEqual(out_addr_n, dsm.out_addr[:4])
+ self.assertEqual(out_plen, dsm.out_plen)
+
+ self.clear_nat_det()
+ deterministic_mappings = self.vapi.nat_det_map_dump()
+ self.assertEqual(len(deterministic_mappings), 0)
+
+ def test_set_timeouts(self):
+ """ Set deterministic NAT timeouts """
+ timeouts_before = self.vapi.nat_det_get_timeouts()
+
+ self.vapi.nat_det_set_timeouts(timeouts_before.udp + 10,
+ timeouts_before.tcp_established + 10,
+ timeouts_before.tcp_transitory + 10,
+ timeouts_before.icmp + 10)
+
+ timeouts_after = self.vapi.nat_det_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_det_in(self):
+ """ Deterministic NAT translation test (TCP, UDP, ICMP) """
+
+ nat_ip = "10.0.0.10"
+
+ self.vapi.nat_det_add_del_map(self.pg0.remote_ip4n,
+ 32,
+ socket.inet_aton(nat_ip),
+ 32)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ 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.nat_det_session_dump(self.pg0.remote_ip4n)
+ self.assertEqual(len(sessions), 3)
+
+ # TCP session
+ s = sessions[0]
+ self.assertEqual(s.ext_addr[:4], self.pg1.remote_ip4n)
+ 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(s.ext_addr[:4], self.pg1.remote_ip4n)
+ 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(s.ext_addr[:4], self.pg1.remote_ip4n)
+ 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.nat_det_add_del_map(host0.ip4n,
+ 24,
+ socket.inet_aton(nat_ip),
+ 32)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ 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.nat_det_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.nat_det_close_session_out(socket.inet_aton(nat_ip),
+ port_out1,
+ self.pg1.remote_ip4n,
+ external_port)
+ dms = self.vapi.nat_det_map_dump()
+ self.assertEqual(dms[0].ses_num, 1)
+
+ self.vapi.nat_det_close_session_in(host0.ip4n,
+ port_in,
+ self.pg1.remote_ip4n,
+ external_port)
+ dms = self.vapi.nat_det_map_dump()
+ self.assertEqual(dms[0].ses_num, 0)
+
+ def test_tcp_session_close_detection_in(self):
+ """ Deterministic NAT TCP session close from inside network """
+ self.vapi.nat_det_add_del_map(self.pg0.remote_ip4n,
+ 32,
+ socket.inet_aton(self.nat_addr),
+ 32)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ 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.nat_det_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.nat_det_add_del_map(self.pg0.remote_ip4n,
+ 32,
+ socket.inet_aton(self.nat_addr),
+ 32)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ 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.nat_det_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.nat_det_add_del_map(self.pg0.remote_ip4n,
+ 32,
+ socket.inet_aton(self.nat_addr),
+ 32)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ self.initiate_tcp_session(self.pg0, self.pg1)
+ self.vapi.nat_det_set_timeouts(5, 5, 5, 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()
+ capture = self.pg1.get_capture(len(pkts))
+ sleep(15)
+
+ dms = self.vapi.nat_det_map_dump()
+ self.assertEqual(0, dms[0].ses_num)
+
+ @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.nat_det_add_del_map(self.pg0.remote_ip4n,
+ 32,
+ socket.inet_aton(self.nat_addr),
+ 32)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.vapi.set_ipfix_exporter(collector_address=self.pg2.remote_ip4n,
+ src_address=self.pg2.local_ip4n,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.nat_ipfix()
+
+ 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()
+ capture = 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()
+ capture = 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.nat_det_map_dump()
+
+ self.assertEqual(1000, dms[0].ses_num)
+
+ # verify IPFIX logging
+ self.vapi.cli("ipfix flush") # FIXME this should be an API call
+ 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)
+
+ def clear_nat_det(self):
+ """
+ Clear deterministic NAT configuration.
+ """
+ self.vapi.nat_ipfix(enable=0)
+ self.vapi.nat_det_set_timeouts()
+ deterministic_mappings = self.vapi.nat_det_map_dump()
+ for dsm in deterministic_mappings:
+ self.vapi.nat_det_add_del_map(dsm.in_addr,
+ dsm.in_plen,
+ dsm.out_addr,
+ dsm.out_plen,
+ is_add=0)
+
+ interfaces = self.vapi.nat44_interface_dump()
+ for intf in interfaces:
+ self.vapi.nat44_interface_add_del_feature(intf.sw_if_index,
+ intf.is_inside,
+ is_add=0)
+
+ def tearDown(self):
+ super(TestDeterministicNAT, self).tearDown()
+ if not self.vpp_dead:
+ self.logger.info(self.vapi.cli("show nat44 detail"))
+ self.clear_nat_det()
+
+
+class TestNAT64(MethodHolder):
+ """ NAT64 Test Cases """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestNAT64, cls).setUpClass()
+
+ try:
+ 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.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.vrf1_nat_addr_n = socket.inet_pton(socket.AF_INET,
+ cls.vrf1_nat_addr)
+
+ cls.create_pg_interfaces(range(3))
+ 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.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()
+
+ except Exception:
+ super(TestNAT64, cls).tearDownClass()
+ raise
+
+ def test_pool(self):
+ """ Add/delete address to NAT64 pool """
+ nat_addr = socket.inet_pton(socket.AF_INET, '1.2.3.4')
+
+ self.vapi.nat64_add_del_pool_addr_range(nat_addr, nat_addr)
+
+ addresses = self.vapi.nat64_pool_addr_dump()
+ self.assertEqual(len(addresses), 1)
+ self.assertEqual(addresses[0].address, nat_addr)
+
+ self.vapi.nat64_add_del_pool_addr_range(nat_addr, nat_addr, 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 """
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+
+ 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.is_inside, 1)
+ pg0_found = True
+ elif intf.sw_if_index == self.pg1.sw_if_index:
+ self.assertEqual(intf.is_inside, 0)
+ pg1_found = True
+ self.assertTrue(pg0_found)
+ self.assertTrue(pg1_found)
+
+ features = self.vapi.cli("show interface features pg0")
+ self.assertNotEqual(features.find('nat64-in2out'), -1)
+ features = self.vapi.cli("show interface features pg1")
+ self.assertNotEqual(features.find('nat64-out2in'), -1)
+
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index, is_add=0)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_add=0)
+
+ interfaces = self.vapi.nat64_interface_dump()
+ self.assertEqual(len(interfaces), 0)
+
+ def test_static_bib(self):
+ """ Add/delete static BIB entry """
+ in_addr = socket.inet_pton(socket.AF_INET6,
+ '2001:db8:85a3::8a2e:370:7334')
+ out_addr = socket.inet_pton(socket.AF_INET, '10.1.1.3')
+ in_port = 1234
+ out_port = 5678
+ proto = IP_PROTOS.tcp
+
+ self.vapi.nat64_add_del_static_bib(in_addr,
+ out_addr,
+ in_port,
+ out_port,
+ proto)
+ bib = self.vapi.nat64_bib_dump(IP_PROTOS.tcp)
+ static_bib_num = 0
+ for bibe in bib:
+ if bibe.is_static:
+ static_bib_num += 1
+ self.assertEqual(bibe.i_addr, in_addr)
+ self.assertEqual(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)
+
+ self.vapi.nat64_add_del_static_bib(in_addr,
+ out_addr,
+ in_port,
+ out_port,
+ proto,
+ is_add=0)
+ bib = self.vapi.nat64_bib_dump(IP_PROTOS.tcp)
+ static_bib_num = 0
+ for bibe in bib:
+ if bibe.is_static:
+ static_bib_num += 1
+ self.assertEqual(static_bib_num, 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_trans, 240)
+ self.assertEqual(timeouts.tcp_est, 7440)
+ self.assertEqual(timeouts.tcp_incoming_syn, 6)
+
+ # set and verify custom values
+ self.vapi.nat64_set_timeouts(udp=200, icmp=30, tcp_trans=250,
+ tcp_est=7450, tcp_incoming_syn=10)
+ timeouts = self.vapi.nat64_get_timeouts()
+ self.assertEqual(timeouts.udp, 200)
+ self.assertEqual(timeouts.icmp, 30)
+ self.assertEqual(timeouts.tcp_trans, 250)
+ self.assertEqual(timeouts.tcp_est, 7450)
+ self.assertEqual(timeouts.tcp_incoming_syn, 10)
+
+ 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(self.nat_addr_n,
+ self.nat_addr_n)
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+
+ # 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))
+ ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4]))
+ self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6)
+
+ # 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(self.vrf1_nat_addr_n,
+ self.vrf1_nat_addr_n,
+ vrf_id=self.vrf1_id)
+ self.vapi.nat64_add_del_interface(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(self.nat_addr_n,
+ self.nat_addr_n)
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+
+ self.vapi.nat64_add_del_static_bib(self.pg0.remote_ip6n,
+ self.nat_addr_n,
+ self.tcp_port_in,
+ self.tcp_port_out,
+ IP_PROTOS.tcp)
+ self.vapi.nat64_add_del_static_bib(self.pg0.remote_ip6n,
+ self.nat_addr_n,
+ self.udp_port_in,
+ self.udp_port_out,
+ IP_PROTOS.udp)
+ self.vapi.nat64_add_del_static_bib(self.pg0.remote_ip6n,
+ self.nat_addr_n,
+ self.icmp_id_in,
+ self.icmp_id_out,
+ IP_PROTOS.icmp)
+
+ # 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(self.nat_addr_n,
+ self.nat_addr_n)
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+ self.vapi.nat64_set_timeouts(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 session after timeout
+ ses_num_after_timeout = self.nat64_get_ses_num()
+ self.assertNotEqual(ses_num_before_timeout, ses_num_after_timeout)
+
+ 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
+
+ ses_num_start = self.nat64_get_ses_num()
+
+ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n,
+ self.nat_addr_n)
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+
+ # 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.check_icmp_checksum(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.check_icmpv6_checksum(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(self.nat_addr_n,
+ self.nat_addr_n)
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+
+ self.vapi.nat64_add_del_static_bib(server.ip6n,
+ self.nat_addr_n,
+ server_tcp_in_port,
+ server_tcp_out_port,
+ IP_PROTOS.tcp)
+ self.vapi.nat64_add_del_static_bib(server.ip6n,
+ self.nat_addr_n,
+ server_udp_in_port,
+ server_udp_out_port,
+ IP_PROTOS.udp)
+
+ # 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)
+ if packet.haslayer(TCP):
+ self.assertNotEqual(packet[TCP].sport, client_tcp_in_port)
+ self.assertEqual(packet[TCP].dport, server_tcp_in_port)
+ self.check_tcp_checksum(packet)
+ 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)
+ self.check_udp_checksum(packet)
+ 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)
+ if packet.haslayer(TCP):
+ self.assertEqual(packet[TCP].sport, server_tcp_out_port)
+ self.assertEqual(packet[TCP].dport, client_tcp_in_port)
+ self.check_tcp_checksum(packet)
+ else:
+ self.assertEqual(packet[UDP].sport, server_udp_out_port)
+ self.assertEqual(packet[UDP].dport, client_udp_in_port)
+ self.check_udp_checksum(packet)
+ 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.check_icmpv6_checksum(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(self.nat_addr_n,
+ self.nat_addr_n)
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+ self.vapi.nat64_add_del_pool_addr_range(self.vrf1_nat_addr_n,
+ self.vrf1_nat_addr_n,
+ vrf_id=self.vrf1_id)
+ self.vapi.nat64_add_del_interface(self.pg2.sw_if_index)
+
+ # Add global prefix
+ global_pref64 = "2001:db8::"
+ global_pref64_n = socket.inet_pton(socket.AF_INET6, global_pref64)
+ global_pref64_len = 32
+ self.vapi.nat64_add_del_prefix(global_pref64_n, global_pref64_len)
+
+ prefix = self.vapi.nat64_prefix_dump()
+ self.assertEqual(len(prefix), 1)
+ self.assertEqual(prefix[0].prefix, global_pref64_n)
+ self.assertEqual(prefix[0].prefix_len, global_pref64_len)
+ self.assertEqual(prefix[0].vrf_id, 0)
+
+ # Add tenant specific prefix
+ vrf1_pref64 = "2001:db8:122:300::"
+ vrf1_pref64_n = socket.inet_pton(socket.AF_INET6, vrf1_pref64)
+ vrf1_pref64_len = 56
+ self.vapi.nat64_add_del_prefix(vrf1_pref64_n,
+ vrf1_pref64_len,
+ vrf_id=self.vrf1_id)
+ 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(self.nat_addr_n,
+ self.nat_addr_n)
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+ 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.assertTrue(packet.haslayer(GRE))
+ self.check_ip_checksum(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_ip_n = socket.inet_pton(socket.AF_INET, server_nat_ip)
+ client_nat_ip_n = socket.inet_pton(socket.AF_INET, client_nat_ip)
+ 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(server_nat_ip_n,
+ client_nat_ip_n)
+ self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+
+ self.vapi.nat64_add_del_static_bib(server.ip6n,
+ server_nat_ip_n,
+ server_tcp_in_port,
+ server_tcp_out_port,
+ IP_PROTOS.tcp)
+
+ self.vapi.nat64_add_del_static_bib(server.ip6n,
+ server_nat_ip_n,
+ 0,
+ 0,
+ IP_PROTOS.gre)
+
+ self.vapi.nat64_add_del_static_bib(client.ip6n,
+ client_nat_ip_n,
+ client_tcp_in_port,
+ client_tcp_out_port,
+ IP_PROTOS.tcp)
+
+ # 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 nat64_get_ses_num(self):
+ """
+ Return number of active NAT64 sessions.
+ """
+ st = self.vapi.nat64_st_dump()
+ return len(st)
+
+ def clear_nat64(self):
+ """
+ Clear NAT64 configuration.
+ """
+ self.vapi.nat64_set_timeouts()
+
+ interfaces = self.vapi.nat64_interface_dump()
+ for intf in interfaces:
+ self.vapi.nat64_add_del_interface(intf.sw_if_index,
+ intf.is_inside,
+ is_add=0)
+
+ bib = self.vapi.nat64_bib_dump(IP_PROTOS.tcp)
+ for bibe in bib:
+ if bibe.is_static:
+ self.vapi.nat64_add_del_static_bib(bibe.i_addr,
+ bibe.o_addr,
+ bibe.i_port,
+ bibe.o_port,
+ bibe.proto,
+ bibe.vrf_id,
+ is_add=0)
+
+ bib = self.vapi.nat64_bib_dump(IP_PROTOS.udp)
+ for bibe in bib:
+ if bibe.is_static:
+ self.vapi.nat64_add_del_static_bib(bibe.i_addr,
+ bibe.o_addr,
+ bibe.i_port,
+ bibe.o_port,
+ bibe.proto,
+ bibe.vrf_id,
+ is_add=0)
+
+ bib = self.vapi.nat64_bib_dump(IP_PROTOS.icmp)
+ for bibe in bib:
+ if bibe.is_static:
+ self.vapi.nat64_add_del_static_bib(bibe.i_addr,
+ bibe.o_addr,
+ bibe.i_port,
+ bibe.o_port,
+ bibe.proto,
+ 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(addr.address,
+ 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.prefix,
+ prefix.prefix_len,
+ vrf_id=prefix.vrf_id,
+ is_add=0)
+
+ def tearDown(self):
+ super(TestNAT64, self).tearDown()
+ if not self.vpp_dead:
+ 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"))
+ self.clear_nat64()
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)