diff options
Diffstat (limited to 'src/plugins')
| -rw-r--r-- | src/plugins/nat/nat.c | 9 | ||||
| -rw-r--r-- | src/plugins/nat/test/test_nat44_ed.py | 3532 | ||||
| -rw-r--r-- | src/plugins/nat/test/test_nat44_ei.py (renamed from src/plugins/nat/test/test_nat44.py) | 3719 |
3 files changed, 3662 insertions, 3598 deletions
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c index e02a11a604f..eeaa443bfe4 100644 --- a/src/plugins/nat/nat.c +++ b/src/plugins/nat/nat.c @@ -4388,16 +4388,13 @@ nat44_sessions_clear () /* *INDENT-OFF* */ vec_foreach (tsm, sm->per_thread_data) { - u32 ti; - nat44_db_free (tsm); nat44_db_init (tsm); - - ti = tsm->snat_thread_index; - vlib_set_simple_counter (&sm->total_users, ti, 0, 0); - vlib_set_simple_counter (&sm->total_sessions, ti, 0, 0); } /* *INDENT-ON* */ + + vlib_zero_simple_counter (&sm->total_users, 0); + vlib_zero_simple_counter (&sm->total_sessions, 0); } static void diff --git a/src/plugins/nat/test/test_nat44_ed.py b/src/plugins/nat/test/test_nat44_ed.py new file mode 100644 index 00000000000..0f4a7371048 --- /dev/null +++ b/src/plugins/nat/test/test_nat44_ed.py @@ -0,0 +1,3532 @@ +#!/usr/bin/env python3 + +import unittest +from io import BytesIO +from random import randint + +import scapy.compat +from framework import VppTestCase, VppTestRunner +from scapy.data import IP_PROTOS +from scapy.layers.inet import IP, TCP, UDP, ICMP, GRE +from scapy.layers.inet import IPerror, TCPerror +from scapy.layers.l2 import Ether +from scapy.packet import Raw +from syslog_rfc5424_parser import SyslogMessage, ParseError +from syslog_rfc5424_parser.constants import SyslogSeverity +from util import ppp, ip4_range +from vpp_acl import AclRule, VppAcl, VppAclInterface +from vpp_ip_route import VppIpRoute, VppRoutePath +from vpp_papi import VppEnum + + +class NAT44EDTestCase(VppTestCase): + + nat_addr = '10.0.0.3' + + tcp_port_in = 6303 + tcp_port_out = 6303 + + udp_port_in = 6304 + udp_port_out = 6304 + + icmp_id_in = 6305 + icmp_id_out = 6305 + + tcp_external_port = 80 + + max_sessions = 100 + + def setUp(self): + super(NAT44EDTestCase, self).setUp() + self.plugin_enable() + + def tearDown(self): + super(NAT44EDTestCase, self).tearDown() + if not self.vpp_dead: + self.plugin_disable() + + def plugin_enable(self): + self.vapi.nat44_plugin_enable_disable( + flags=self.nat44_config_flags.NAT44_IS_ENDPOINT_DEPENDENT, + sessions=self.max_sessions, enable=1) + + def plugin_disable(self): + self.vapi.nat44_plugin_enable_disable(enable=0) + + @property + def config_flags(self): + return VppEnum.vl_api_nat_config_flags_t + + @property + def nat44_config_flags(self): + return VppEnum.vl_api_nat44_config_flags_t + + @property + def syslog_severity(self): + return VppEnum.vl_api_syslog_severity_t + + @property + def server_addr(self): + return self.pg1.remote_hosts[0].ip4 + + @staticmethod + def random_port(): + return randint(1025, 65535) + + @staticmethod + def proto2layer(proto): + if proto == IP_PROTOS.tcp: + return TCP + elif proto == IP_PROTOS.udp: + return UDP + elif proto == IP_PROTOS.icmp: + return ICMP + else: + raise Exception("Unsupported protocol") + + @classmethod + def create_and_add_ip4_table(cls, i, table_id=0): + cls.vapi.ip_table_add_del(is_add=1, table={'table_id': table_id}) + i.set_table_ip4(table_id) + + @classmethod + def configure_ip4_interface(cls, i, hosts=0, table_id=None): + if table_id: + cls.create_and_add_ip4_table(i, table_id) + + i.admin_up() + i.unconfig_ip4() + i.config_ip4() + i.resolve_arp() + + if hosts: + i.generate_remote_hosts(hosts) + i.configure_ipv4_neighbors() + + @classmethod + def nat_add_interface_address(cls, i): + cls.vapi.nat44_add_del_interface_addr( + sw_if_index=i.sw_if_index, is_add=1) + + def nat_add_inside_interface(self, i): + self.vapi.nat44_interface_add_del_feature( + flags=self.config_flags.NAT_IS_INSIDE, + sw_if_index=i.sw_if_index, is_add=1) + + def nat_add_outside_interface(self, i): + self.vapi.nat44_interface_add_del_feature( + flags=self.config_flags.NAT_IS_OUTSIDE, + sw_if_index=i.sw_if_index, is_add=1) + + def nat_add_address(self, address, twice_nat=0, + vrf_id=0xFFFFFFFF, is_add=1): + flags = self.config_flags.NAT_IS_TWICE_NAT if twice_nat else 0 + self.vapi.nat44_add_del_address_range(first_ip_address=address, + last_ip_address=address, + vrf_id=vrf_id, + is_add=is_add, + flags=flags) + + def nat_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, tag="", flags=0): + + if not (local_port and external_port): + flags |= self.config_flags.NAT_IS_ADDR_ONLY + + self.vapi.nat44_add_del_static_mapping( + is_add=is_add, + local_ip_address=local_ip, + external_ip_address=external_ip, + external_sw_if_index=external_sw_if_index, + local_port=local_port, + external_port=external_port, + vrf_id=vrf_id, protocol=proto, + flags=flags, + tag=tag) + + @classmethod + def setUpClass(cls): + super(NAT44EDTestCase, cls).setUpClass() + cls.vapi.cli("set log class nat level debug") + + cls.create_pg_interfaces(range(12)) + cls.interfaces = list(cls.pg_interfaces[:4]) + + cls.create_and_add_ip4_table(cls.pg2, 10) + + for i in cls.interfaces: + cls.configure_ip4_interface(i, hosts=3) + + # test specific (test-multiple-vrf) + cls.vapi.ip_table_add_del(is_add=1, table={'table_id': 1}) + + # test specific (test-one-armed-nat44-static) + cls.pg4.generate_remote_hosts(2) + cls.pg4.config_ip4() + cls.vapi.sw_interface_add_del_address( + sw_if_index=cls.pg4.sw_if_index, + prefix="10.0.0.1/24") + cls.pg4.admin_up() + cls.pg4.resolve_arp() + cls.pg4._remote_hosts[1]._ip4 = cls.pg4._remote_hosts[0]._ip4 + cls.pg4.resolve_arp() + + # test specific interface (pg5) + cls.pg5._local_ip4 = "10.1.1.1" + cls.pg5._remote_hosts[0]._ip4 = "10.1.1.2" + cls.pg5.set_table_ip4(1) + cls.pg5.config_ip4() + cls.pg5.admin_up() + cls.pg5.resolve_arp() + + # test specific interface (pg6) + cls.pg6._local_ip4 = "10.1.2.1" + cls.pg6._remote_hosts[0]._ip4 = "10.1.2.2" + cls.pg6.set_table_ip4(1) + cls.pg6.config_ip4() + cls.pg6.admin_up() + cls.pg6.resolve_arp() + + rl = list() + + rl.append(VppIpRoute(cls, "0.0.0.0", 0, + [VppRoutePath("0.0.0.0", 0xffffffff, + nh_table_id=0)], + register=False, table_id=1)) + rl.append(VppIpRoute(cls, "0.0.0.0", 0, + [VppRoutePath(cls.pg1.local_ip4, + cls.pg1.sw_if_index)], + register=False)) + rl.append(VppIpRoute(cls, cls.pg5.remote_ip4, 32, + [VppRoutePath("0.0.0.0", + cls.pg5.sw_if_index)], + register=False, table_id=1)) + rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 32, + [VppRoutePath("0.0.0.0", + cls.pg6.sw_if_index)], + register=False, table_id=1)) + rl.append(VppIpRoute(cls, cls.pg6.remote_ip4, 16, + [VppRoutePath("0.0.0.0", 0xffffffff, + nh_table_id=1)], + register=False, table_id=0)) + + for r in rl: + r.add_vpp_config() + + def get_err_counter(self, path): + return self.statistics.get_err_counter(path) + + def get_stats_counter(self, path, worker=0): + return self.statistics.get_counter(path)[worker] + + def reass_hairpinning(self, server_addr, server_in_port, server_out_port, + host_in_port, proto=IP_PROTOS.tcp, + ignore_port=False): + layer = self.proto2layer(proto) + + if proto == IP_PROTOS.tcp: + data = b"A" * 4 + b"B" * 16 + b"C" * 3 + else: + data = b"A" * 16 + b"B" * 16 + b"C" * 3 + + # send packet from host to server + pkts = self.create_stream_frag(self.pg0, + self.nat_addr, + host_in_port, + server_out_port, + data, + proto) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + frags = self.pg0.get_capture(len(pkts)) + p = self.reass_frags_and_verify(frags, + self.nat_addr, + server_addr) + if proto != IP_PROTOS.icmp: + if not ignore_port: + self.assertNotEqual(p[layer].sport, host_in_port) + self.assertEqual(p[layer].dport, server_in_port) + else: + if not ignore_port: + self.assertNotEqual(p[layer].id, host_in_port) + self.assertEqual(data, p[Raw].load) + + def frag_out_of_order(self, proto=IP_PROTOS.tcp, dont_translate=False, + ignore_port=False): + layer = self.proto2layer(proto) + + if proto == IP_PROTOS.tcp: + data = b"A" * 4 + b"B" * 16 + b"C" * 3 + else: + data = b"A" * 16 + b"B" * 16 + b"C" * 3 + self.port_in = self.random_port() + + for i in range(2): + # in2out + pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4, + self.port_in, 20, data, proto) + pkts.reverse() + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + frags = self.pg1.get_capture(len(pkts)) + if not dont_translate: + p = self.reass_frags_and_verify(frags, + self.nat_addr, + self.pg1.remote_ip4) + else: + p = self.reass_frags_and_verify(frags, + self.pg0.remote_ip4, + self.pg1.remote_ip4) + if proto != IP_PROTOS.icmp: + if not dont_translate: + self.assertEqual(p[layer].dport, 20) + if not ignore_port: + self.assertNotEqual(p[layer].sport, self.port_in) + else: + self.assertEqual(p[layer].sport, self.port_in) + else: + if not ignore_port: + if not dont_translate: + self.assertNotEqual(p[layer].id, self.port_in) + else: + self.assertEqual(p[layer].id, self.port_in) + self.assertEqual(data, p[Raw].load) + + # out2in + if not dont_translate: + dst_addr = self.nat_addr + else: + dst_addr = self.pg0.remote_ip4 + if proto != IP_PROTOS.icmp: + sport = 20 + dport = p[layer].sport + else: + sport = p[layer].id + dport = 0 + pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport, + data, proto, echo_reply=True) + pkts.reverse() + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + frags = self.pg0.get_capture(len(pkts)) + p = self.reass_frags_and_verify(frags, + self.pg1.remote_ip4, + self.pg0.remote_ip4) + if proto != IP_PROTOS.icmp: + self.assertEqual(p[layer].sport, 20) + self.assertEqual(p[layer].dport, self.port_in) + else: + self.assertEqual(p[layer].id, self.port_in) + self.assertEqual(data, p[Raw].load) + + def reass_frags_and_verify(self, frags, src, dst): + buffer = BytesIO() + for p in frags: + self.assertEqual(p[IP].src, src) + self.assertEqual(p[IP].dst, dst) + self.assert_ip_checksum_valid(p) + buffer.seek(p[IP].frag * 8) + buffer.write(bytes(p[IP].payload)) + ip = IP(src=frags[0][IP].src, dst=frags[0][IP].dst, + proto=frags[0][IP].proto) + if ip.proto == IP_PROTOS.tcp: + p = (ip / TCP(buffer.getvalue())) + self.logger.debug(ppp("Reassembled:", p)) + self.assert_tcp_checksum_valid(p) + elif ip.proto == IP_PROTOS.udp: + p = (ip / UDP(buffer.getvalue()[:8]) / + Raw(buffer.getvalue()[8:])) + elif ip.proto == IP_PROTOS.icmp: + p = (ip / ICMP(buffer.getvalue())) + return p + + def frag_in_order(self, proto=IP_PROTOS.tcp, dont_translate=False, + ignore_port=False): + layer = self.proto2layer(proto) + + if proto == IP_PROTOS.tcp: + data = b"A" * 4 + b"B" * 16 + b"C" * 3 + else: + data = b"A" * 16 + b"B" * 16 + b"C" * 3 + self.port_in = self.random_port() + + # in2out + pkts = self.create_stream_frag(self.pg0, self.pg1.remote_ip4, + self.port_in, 20, data, proto) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + frags = self.pg1.get_capture(len(pkts)) + if not dont_translate: + p = self.reass_frags_and_verify(frags, + self.nat_addr, + self.pg1.remote_ip4) + else: + p = self.reass_frags_and_verify(frags, + self.pg0.remote_ip4, + self.pg1.remote_ip4) + if proto != IP_PROTOS.icmp: + if not dont_translate: + self.assertEqual(p[layer].dport, 20) + if not ignore_port: + self.assertNotEqual(p[layer].sport, self.port_in) + else: + self.assertEqual(p[layer].sport, self.port_in) + else: + if not ignore_port: + if not dont_translate: + self.assertNotEqual(p[layer].id, self.port_in) + else: + self.assertEqual(p[layer].id, self.port_in) + self.assertEqual(data, p[Raw].load) + + # out2in + if not dont_translate: + dst_addr = self.nat_addr + else: + dst_addr = self.pg0.remote_ip4 + if proto != IP_PROTOS.icmp: + sport = 20 + dport = p[layer].sport + else: + sport = p[layer].id + dport = 0 + pkts = self.create_stream_frag(self.pg1, dst_addr, sport, dport, data, + proto, echo_reply=True) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + frags = self.pg0.get_capture(len(pkts)) + p = self.reass_frags_and_verify(frags, + self.pg1.remote_ip4, + self.pg0.remote_ip4) + if proto != IP_PROTOS.icmp: + self.assertEqual(p[layer].sport, 20) + self.assertEqual(p[layer].dport, self.port_in) + else: + self.assertEqual(p[layer].id, self.port_in) + self.assertEqual(data, p[Raw].load) + + def verify_capture_out(self, capture, nat_ip=None, same_port=False, + dst_ip=None, ignore_port=False): + if nat_ip is None: + nat_ip = self.nat_addr + for packet in capture: + try: + self.assert_packet_checksums_valid(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 not ignore_port: + if same_port: + self.assertEqual( + packet[TCP].sport, self.tcp_port_in) + else: + self.assertNotEqual( + packet[TCP].sport, self.tcp_port_in) + self.tcp_port_out = packet[TCP].sport + self.assert_packet_checksums_valid(packet) + elif packet.haslayer(UDP): + if not ignore_port: + if same_port: + self.assertEqual( + packet[UDP].sport, self.udp_port_in) + else: + self.assertNotEqual( + packet[UDP].sport, self.udp_port_in) + self.udp_port_out = packet[UDP].sport + else: + if not ignore_port: + if same_port: + self.assertEqual( + packet[ICMP].id, self.icmp_id_in) + else: + self.assertNotEqual( + packet[ICMP].id, self.icmp_id_in) + self.icmp_id_out = packet[ICMP].id + self.assert_packet_checksums_valid(packet) + except: + self.logger.error(ppp("Unexpected or invalid packet " + "(outside network):", packet)) + raise + + def verify_capture_in(self, capture, in_if): + for packet in capture: + try: + self.assert_packet_checksums_valid(packet) + self.assertEqual(packet[IP].dst, in_if.remote_ip4) + if packet.haslayer(TCP): + self.assertEqual(packet[TCP].dport, self.tcp_port_in) + elif packet.haslayer(UDP): + self.assertEqual(packet[UDP].dport, self.udp_port_in) + else: + self.assertEqual(packet[ICMP].id, self.icmp_id_in) + except: + self.logger.error(ppp("Unexpected or invalid packet " + "(inside network):", packet)) + raise + + def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64): + if dst_ip is None: + dst_ip = out_if.remote_ip4 + + pkts = [] + # TCP + p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / + IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) / + TCP(sport=self.tcp_port_in, dport=20)) + pkts.extend([p, p]) + + # UDP + p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / + IP(src=in_if.remote_ip4, dst=dst_ip, 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=dst_ip, 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, + use_inside_ports=False): + if dst_ip is None: + dst_ip = self.nat_addr + if not use_inside_ports: + tcp_port = self.tcp_port_out + udp_port = self.udp_port_out + icmp_id = self.icmp_id_out + else: + tcp_port = self.tcp_port_in + udp_port = self.udp_port_in + icmp_id = self.icmp_id_in + pkts = [] + # TCP + p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / + IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / + TCP(dport=tcp_port, sport=20)) + pkts.extend([p, p]) + + # UDP + p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / + IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / + UDP(dport=udp_port, sport=20)) + pkts.append(p) + + # ICMP + p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / + IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / + ICMP(id=icmp_id, type='echo-reply')) + pkts.append(p) + + return pkts + + def create_tcp_stream(self, in_if, out_if, count): + pkts = [] + port = 6303 + + for i in range(count): + p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / + IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=64) / + TCP(sport=port + i, dport=20)) + pkts.append(p) + + return pkts + + def create_stream_frag(self, src_if, dst, sport, dport, data, + proto=IP_PROTOS.tcp, echo_reply=False): + if proto == IP_PROTOS.tcp: + p = (IP(src=src_if.remote_ip4, dst=dst) / + TCP(sport=sport, dport=dport) / + Raw(data)) + p = p.__class__(scapy.compat.raw(p)) + chksum = p[TCP].chksum + proto_header = TCP(sport=sport, dport=dport, chksum=chksum) + elif proto == IP_PROTOS.udp: + proto_header = UDP(sport=sport, dport=dport) + elif proto == IP_PROTOS.icmp: + if not echo_reply: + proto_header = ICMP(id=sport, type='echo-request') + else: + proto_header = ICMP(id=sport, type='echo-reply') + else: + raise Exception("Unsupported protocol") + id = self.random_port() + pkts = [] + if proto == IP_PROTOS.tcp: + raw = Raw(data[0:4]) + else: + raw = Raw(data[0:16]) + p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) / + IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=0, id=id) / + proto_header / + raw) + pkts.append(p) + if proto == IP_PROTOS.tcp: + raw = Raw(data[4:20]) + else: + raw = Raw(data[16:32]) + p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) / + IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=3, id=id, + proto=proto) / + raw) + pkts.append(p) + if proto == IP_PROTOS.tcp: + raw = Raw(data[20:]) + else: + raw = Raw(data[32:]) + p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) / + IP(src=src_if.remote_ip4, dst=dst, frag=5, proto=proto, + id=id) / + raw) + pkts.append(p) + return pkts + + def frag_in_order_in_plus_out(self, in_addr, out_addr, in_port, out_port, + proto=IP_PROTOS.tcp): + + layer = self.proto2layer(proto) + + if proto == IP_PROTOS.tcp: + data = b"A" * 4 + b"B" * 16 + b"C" * 3 + else: + data = b"A" * 16 + b"B" * 16 + b"C" * 3 + port_in = self.random_port() + + for i in range(2): + # out2in + pkts = self.create_stream_frag(self.pg0, out_addr, + port_in, out_port, + data, proto) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + frags = self.pg1.get_capture(len(pkts)) + p = self.reass_frags_and_verify(frags, + self.pg0.remote_ip4, + in_addr) + if proto != IP_PROTOS.icmp: + self.assertEqual(p[layer].sport, port_in) + self.assertEqual(p[layer].dport, in_port) + else: + self.assertEqual(p[layer].id, port_in) + self.assertEqual(data, p[Raw].load) + + # in2out + if proto != IP_PROTOS.icmp: + pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4, + in_port, + p[layer].sport, data, proto) + else: + pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4, + p[layer].id, 0, data, proto, + echo_reply=True) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + frags = self.pg0.get_capture(len(pkts)) + p = self.reass_frags_and_verify(frags, + out_addr, + self.pg0.remote_ip4) + if proto != IP_PROTOS.icmp: + self.assertEqual(p[layer].sport, out_port) + self.assertEqual(p[layer].dport, port_in) + else: + self.assertEqual(p[layer].id, port_in) + self.assertEqual(data, p[Raw].load) + + def frag_out_of_order_in_plus_out(self, in_addr, out_addr, in_port, + out_port, proto=IP_PROTOS.tcp): + + layer = self.proto2layer(proto) + + if proto == IP_PROTOS.tcp: + data = b"A" * 4 + b"B" * 16 + b"C" * 3 + else: + data = b"A" * 16 + b"B" * 16 + b"C" * 3 + port_in = self.random_port() + + for i in range(2): + # out2in + pkts = self.create_stream_frag(self.pg0, out_addr, + port_in, out_port, + data, proto) + pkts.reverse() + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + frags = self.pg1.get_capture(len(pkts)) + p = self.reass_frags_and_verify(frags, + self.pg0.remote_ip4, + in_addr) + if proto != IP_PROTOS.icmp: + self.assertEqual(p[layer].dport, in_port) + self.assertEqual(p[layer].sport, port_in) + self.assertEqual(p[layer].dport, in_port) + else: + self.assertEqual(p[layer].id, port_in) + self.assertEqual(data, p[Raw].load) + + # in2out + if proto != IP_PROTOS.icmp: + pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4, + in_port, + p[layer].sport, data, proto) + else: + pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4, + p[layer].id, 0, data, proto, + echo_reply=True) + pkts.reverse() + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + frags = self.pg0.get_capture(len(pkts)) + p = self.reass_frags_and_verify(frags, + out_addr, + self.pg0.remote_ip4) + if proto != IP_PROTOS.icmp: + self.assertEqual(p[layer].sport, out_port) + self.assertEqual(p[layer].dport, port_in) + else: + self.assertEqual(p[layer].id, port_in) + self.assertEqual(data, p[Raw].load) + + def init_tcp_session(self, in_if, out_if, in_port, ext_port): + # 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=in_port, dport=ext_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] + out_port = 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=ext_port, dport=out_port, 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=in_port, dport=ext_port, flags="A")) + in_if.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + out_if.get_capture(1) + + return out_port + + def twice_nat_common(self, self_twice_nat=False, same_pg=False, lb=False, + client_id=None): + twice_nat_addr = '10.0.1.3' + + port_in = 8080 + if lb: + if not same_pg: + port_in1 = port_in + port_in2 = port_in + else: + port_in1 = port_in + 1 + port_in2 = port_in + 2 + + port_out = 80 + eh_port_out = 4567 + + server1 = self.pg0.remote_hosts[0] + server2 = self.pg0.remote_hosts[1] + if lb and same_pg: + server2 = server1 + if not lb: + server = server1 + + pg0 = self.pg0 + if same_pg: + pg1 = self.pg0 + else: + pg1 = self.pg1 + + eh_translate = ((not self_twice_nat) or (not lb and same_pg) or + client_id == 1) + + self.nat_add_address(self.nat_addr) + self.nat_add_address(twice_nat_addr, twice_nat=1) + + flags = 0 + if self_twice_nat: + flags |= self.config_flags.NAT_IS_SELF_TWICE_NAT + else: + flags |= self.config_flags.NAT_IS_TWICE_NAT + + if not lb: + self.nat_add_static_mapping(pg0.remote_ip4, self.nat_addr, + port_in, port_out, + proto=IP_PROTOS.tcp, + flags=flags) + else: + locals = [{'addr': server1.ip4, + 'port': port_in1, + 'probability': 50, + 'vrf_id': 0}, + {'addr': server2.ip4, + 'port': port_in2, + 'probability': 50, + 'vrf_id': 0}] + out_addr = self.nat_addr + + self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags, + external_addr=out_addr, + external_port=port_out, + protocol=IP_PROTOS.tcp, + local_num=len(locals), + locals=locals) + self.nat_add_inside_interface(pg0) + self.nat_add_outside_interface(pg1) + + if same_pg: + if not lb: + client = server + else: + assert client_id is not None + if client_id == 1: + client = self.pg0.remote_hosts[0] + elif client_id == 2: + client = self.pg0.remote_hosts[1] + else: + client = pg1.remote_hosts[0] + p = (Ether(src=pg1.remote_mac, dst=pg1.local_mac) / + IP(src=client.ip4, dst=self.nat_addr) / + TCP(sport=eh_port_out, dport=port_out)) + pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = pg0.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + if lb: + if ip.dst == server1.ip4: + server = server1 + port_in = port_in1 + else: + server = server2 + port_in = port_in2 + self.assertEqual(ip.dst, server.ip4) + if lb and same_pg: + self.assertIn(tcp.dport, [port_in1, port_in2]) + else: + self.assertEqual(tcp.dport, port_in) + if eh_translate: + self.assertEqual(ip.src, twice_nat_addr) + self.assertNotEqual(tcp.sport, eh_port_out) + else: + self.assertEqual(ip.src, client.ip4) + self.assertEqual(tcp.sport, eh_port_out) + eh_addr_in = ip.src + eh_port_in = tcp.sport + saved_port_in = tcp.dport + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + p = (Ether(src=server.mac, dst=pg0.local_mac) / + IP(src=server.ip4, dst=eh_addr_in) / + TCP(sport=saved_port_in, dport=eh_port_in)) + pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = pg1.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.dst, client.ip4) + self.assertEqual(ip.src, self.nat_addr) + self.assertEqual(tcp.dport, eh_port_out) + self.assertEqual(tcp.sport, port_out) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + if eh_translate: + sessions = self.vapi.nat44_user_session_dump(server.ip4, 0) + self.assertEqual(len(sessions), 1) + self.assertTrue(sessions[0].flags & + self.config_flags.NAT_IS_EXT_HOST_VALID) + self.assertTrue(sessions[0].flags & + self.config_flags.NAT_IS_TWICE_NAT) + self.logger.info(self.vapi.cli("show nat44 sessions detail")) + self.vapi.nat44_del_session( + address=sessions[0].inside_ip_address, + port=sessions[0].inside_port, + protocol=sessions[0].protocol, + flags=(self.config_flags.NAT_IS_INSIDE | + self.config_flags.NAT_IS_EXT_HOST_VALID), + ext_host_address=sessions[0].ext_host_nat_address, + ext_host_port=sessions[0].ext_host_nat_port) + sessions = self.vapi.nat44_user_session_dump(server.ip4, 0) + self.assertEqual(len(sessions), 0) + + def verify_syslog_sess(self, data, is_add=True, is_ip6=False): + message = data.decode('utf-8') + try: + message = SyslogMessage.parse(message) + except ParseError as e: + self.logger.error(e) + raise + else: + self.assertEqual(message.severity, SyslogSeverity.info) + self.assertEqual(message.appname, 'NAT') + self.assertEqual(message.msgid, 'SADD' if is_add else 'SDEL') + sd_params = message.sd.get('nsess') + self.assertTrue(sd_params is not None) + if is_ip6: + self.assertEqual(sd_params.get('IATYP'), 'IPv6') + self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip6) + else: + self.assertEqual(sd_params.get('IATYP'), 'IPv4') + self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4) + self.assertTrue(sd_params.get('SSUBIX') is not None) + self.assertEqual(sd_params.get('ISPORT'), "%d" % self.tcp_port_in) + self.assertEqual(sd_params.get('XATYP'), 'IPv4') + self.assertEqual(sd_params.get('XSADDR'), self.nat_addr) + self.assertEqual(sd_params.get('XSPORT'), "%d" % self.tcp_port_out) + self.assertEqual(sd_params.get('PROTO'), "%d" % IP_PROTOS.tcp) + self.assertEqual(sd_params.get('SVLAN'), '0') + self.assertEqual(sd_params.get('XDADDR'), self.pg1.remote_ip4) + self.assertEqual(sd_params.get('XDPORT'), + "%d" % self.tcp_external_port) + + +class TestNAT44ED(NAT44EDTestCase): + """ NAT44ED Test Case """ + + def test_users_dump(self): + """ NAT44ED API test - nat44_user_dump """ + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + self.vapi.nat44_forwarding_enable_disable(enable=1) + + local_ip = self.pg0.remote_ip4 + external_ip = self.nat_addr + self.nat_add_static_mapping(local_ip, external_ip) + + users = self.vapi.nat44_user_dump() + self.assertEqual(len(users), 0) + + # in2out - static mapping match + + 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) + + 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, same_port=True) + + users = self.vapi.nat44_user_dump() + self.assertEqual(len(users), 1) + static_user = users[0] + self.assertEqual(static_user.nstaticsessions, 3) + self.assertEqual(static_user.nsessions, 0) + + # in2out - no static mapping match (forwarding test) + + host0 = self.pg0.remote_hosts[0] + self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1] + try: + pkts = self.create_stream_out(self.pg1, + dst_ip=self.pg0.remote_ip4, + use_inside_ports=True) + 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) + + 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=self.pg0.remote_ip4, + same_port=True) + finally: + self.pg0.remote_hosts[0] = host0 + + users = self.vapi.nat44_user_dump() + self.assertEqual(len(users), 2) + if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4: + non_static_user = users[1] + static_user = users[0] + else: + non_static_user = users[0] + static_user = users[1] + self.assertEqual(static_user.nstaticsessions, 3) + self.assertEqual(static_user.nsessions, 0) + self.assertEqual(non_static_user.nstaticsessions, 0) + self.assertEqual(non_static_user.nsessions, 3) + + users = self.vapi.nat44_user_dump() + self.assertEqual(len(users), 2) + if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4: + non_static_user = users[1] + static_user = users[0] + else: + non_static_user = users[0] + static_user = users[1] + self.assertEqual(static_user.nstaticsessions, 3) + self.assertEqual(static_user.nsessions, 0) + self.assertEqual(non_static_user.nstaticsessions, 0) + self.assertEqual(non_static_user.nsessions, 3) + + def test_frag_out_of_order_do_not_translate(self): + """ NAT44ED don't translate fragments arriving out of order """ + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + self.vapi.nat44_forwarding_enable_disable(enable=True) + self.frag_out_of_order(proto=IP_PROTOS.tcp, dont_translate=True) + + def test_forwarding(self): + """ NAT44ED forwarding test """ + + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + self.vapi.nat44_forwarding_enable_disable(enable=1) + + real_ip = self.pg0.remote_ip4 + alias_ip = self.nat_addr + flags = self.config_flags.NAT_IS_ADDR_ONLY + self.vapi.nat44_add_del_static_mapping(is_add=1, + local_ip_address=real_ip, + external_ip_address=alias_ip, + external_sw_if_index=0xFFFFFFFF, + flags=flags) + + try: + # in2out - static mapping match + + 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) + + 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, same_port=True) + + # in2out - no static mapping match + + host0 = self.pg0.remote_hosts[0] + self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1] + try: + pkts = self.create_stream_out(self.pg1, + dst_ip=self.pg0.remote_ip4, + use_inside_ports=True) + 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) + + 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=self.pg0.remote_ip4, + same_port=True) + finally: + self.pg0.remote_hosts[0] = host0 + + user = self.pg0.remote_hosts[1] + sessions = self.vapi.nat44_user_session_dump(user.ip4, 0) + self.assertEqual(len(sessions), 3) + self.assertTrue(sessions[0].flags & + self.config_flags.NAT_IS_EXT_HOST_VALID) + self.vapi.nat44_del_session( + address=sessions[0].inside_ip_address, + port=sessions[0].inside_port, + protocol=sessions[0].protocol, + flags=(self.config_flags.NAT_IS_INSIDE | + self.config_flags.NAT_IS_EXT_HOST_VALID), + ext_host_address=sessions[0].ext_host_address, + ext_host_port=sessions[0].ext_host_port) + sessions = self.vapi.nat44_user_session_dump(user.ip4, 0) + self.assertEqual(len(sessions), 2) + + finally: + self.vapi.nat44_forwarding_enable_disable(enable=0) + flags = self.config_flags.NAT_IS_ADDR_ONLY + self.vapi.nat44_add_del_static_mapping( + is_add=0, + local_ip_address=real_ip, + external_ip_address=alias_ip, + external_sw_if_index=0xFFFFFFFF, + flags=flags) + + def test_output_feature_and_service2(self): + """ NAT44ED interface output feature and service host direct access """ + self.vapi.nat44_forwarding_enable_disable(enable=1) + self.nat_add_address(self.nat_addr) + + self.vapi.nat44_interface_add_del_output_feature( + sw_if_index=self.pg1.sw_if_index, is_add=1,) + + # session initiated from service host - translate + 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, ignore_port=True) + + 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) + + # session initiated from remote host - do not translate + tcp_port_in = self.tcp_port_in + udp_port_in = self.udp_port_in + icmp_id_in = self.icmp_id_in + + self.tcp_port_in = 60303 + self.udp_port_in = 60304 + self.icmp_id_in = 60305 + + try: + pkts = self.create_stream_out(self.pg1, + self.pg0.remote_ip4, + use_inside_ports=True) + 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) + + 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=self.pg0.remote_ip4, + same_port=True) + finally: + self.tcp_port_in = tcp_port_in + self.udp_port_in = udp_port_in + self.icmp_id_in = icmp_id_in + + def test_twice_nat(self): + """ NAT44ED Twice NAT """ + self.twice_nat_common() + + def test_self_twice_nat_positive(self): + """ NAT44ED Self Twice NAT (positive test) """ + self.twice_nat_common(self_twice_nat=True, same_pg=True) + + def test_self_twice_nat_lb_positive(self): + """ NAT44ED Self Twice NAT local service load balancing (positive test) + """ + self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True, + client_id=1) + + def test_twice_nat_lb(self): + """ NAT44ED Twice NAT local service load balancing """ + self.twice_nat_common(lb=True) + + def test_output_feature(self): + """ NAT44ED interface output feature (in2out postrouting) """ + self.vapi.nat44_forwarding_enable_disable(enable=1) + self.nat_add_address(self.nat_addr) + + self.nat_add_outside_interface(self.pg0) + self.vapi.nat44_interface_add_del_output_feature( + sw_if_index=self.pg1.sw_if_index, is_add=1) + + # 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, ignore_port=True) + + # 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_out2(self): + """ NAT44ED 1:1 NAPT asymmetrical rule """ + + external_port = 80 + local_port = 8080 + + self.vapi.nat44_forwarding_enable_disable(enable=1) + flags = self.config_flags.NAT_IS_OUT2IN_ONLY + self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + local_port, external_port, + proto=IP_PROTOS.tcp, flags=flags) + + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + # from client to service + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=12345, dport=external_port)) + 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.dst, self.pg0.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # ICMP error + p = (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) / capture[0][IP]) + 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: + self.assertEqual(p[IP].src, self.nat_addr) + inner = p[IPerror] + self.assertEqual(inner.dst, self.nat_addr) + self.assertEqual(inner[TCPerror].dport, external_port) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service back to client + 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=local_port, dport=12345)) + 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, self.nat_addr) + self.assertEqual(tcp.sport, external_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # ICMP error + p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + ICMP(type=11) / capture[0][IP]) + 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: + self.assertEqual(p[IP].dst, self.pg0.remote_ip4) + inner = p[IPerror] + self.assertEqual(inner.src, self.pg0.remote_ip4) + self.assertEqual(inner[TCPerror].sport, local_port) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from client to server (no translation) + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) / + TCP(sport=12346, dport=local_port)) + 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.dst, self.pg0.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service back to client (no translation) + 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=local_port, dport=12346)) + 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, self.pg0.remote_ip4) + self.assertEqual(tcp.sport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + def test_static_lb(self): + """ NAT44ED local service load balancing """ + external_addr_n = self.nat_addr + external_port = 80 + local_port = 8080 + server1 = self.pg0.remote_hosts[0] + server2 = self.pg0.remote_hosts[1] + + locals = [{'addr': server1.ip4, + 'port': local_port, + 'probability': 70, + 'vrf_id': 0}, + {'addr': server2.ip4, + 'port': local_port, + 'probability': 30, + 'vrf_id': 0}] + + self.nat_add_address(self.nat_addr) + self.vapi.nat44_add_del_lb_static_mapping( + is_add=1, + external_addr=external_addr_n, + external_port=external_port, + protocol=IP_PROTOS.tcp, + local_num=len(locals), + locals=locals) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg0.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg1.sw_if_index, + is_add=1) + + # from client to service + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=12345, dport=external_port)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + p = capture[0] + server = None + try: + ip = p[IP] + tcp = p[TCP] + self.assertIn(ip.dst, [server1.ip4, server2.ip4]) + if ip.dst == server1.ip4: + server = server1 + else: + server = server2 + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service back to client + p = (Ether(src=server.mac, dst=self.pg0.local_mac) / + IP(src=server.ip4, dst=self.pg1.remote_ip4) / + TCP(sport=local_port, dport=12345)) + 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, self.nat_addr) + self.assertEqual(tcp.sport, external_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + sessions = self.vapi.nat44_user_session_dump(server.ip4, 0) + self.assertEqual(len(sessions), 1) + self.assertTrue(sessions[0].flags & + self.config_flags.NAT_IS_EXT_HOST_VALID) + self.vapi.nat44_del_session( + address=sessions[0].inside_ip_address, + port=sessions[0].inside_port, + protocol=sessions[0].protocol, + flags=(self.config_flags.NAT_IS_INSIDE | + self.config_flags.NAT_IS_EXT_HOST_VALID), + ext_host_address=sessions[0].ext_host_address, + ext_host_port=sessions[0].ext_host_port) + sessions = self.vapi.nat44_user_session_dump(server.ip4, 0) + self.assertEqual(len(sessions), 0) + + def test_static_lb_2(self): + """ NAT44ED local service load balancing (asymmetrical rule) """ + external_addr = self.nat_addr + external_port = 80 + local_port = 8080 + server1 = self.pg0.remote_hosts[0] + server2 = self.pg0.remote_hosts[1] + + locals = [{'addr': server1.ip4, + 'port': local_port, + 'probability': 70, + 'vrf_id': 0}, + {'addr': server2.ip4, + 'port': local_port, + 'probability': 30, + 'vrf_id': 0}] + + self.vapi.nat44_forwarding_enable_disable(enable=1) + flags = self.config_flags.NAT_IS_OUT2IN_ONLY + self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags, + external_addr=external_addr, + external_port=external_port, + protocol=IP_PROTOS.tcp, + local_num=len(locals), + locals=locals) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg0.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg1.sw_if_index, + is_add=1) + + # from client to service + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=12345, dport=external_port)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + p = capture[0] + server = None + try: + ip = p[IP] + tcp = p[TCP] + self.assertIn(ip.dst, [server1.ip4, server2.ip4]) + if ip.dst == server1.ip4: + server = server1 + else: + server = server2 + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service back to client + p = (Ether(src=server.mac, dst=self.pg0.local_mac) / + IP(src=server.ip4, dst=self.pg1.remote_ip4) / + TCP(sport=local_port, dport=12345)) + 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, self.nat_addr) + self.assertEqual(tcp.sport, external_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from client to server (no translation) + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=server1.ip4) / + TCP(sport=12346, dport=local_port)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + p = capture[0] + server = None + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.dst, server1.ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service back to client (no translation) + p = (Ether(src=server1.mac, dst=self.pg0.local_mac) / + IP(src=server1.ip4, dst=self.pg1.remote_ip4) / + TCP(sport=local_port, dport=12346)) + 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, server1.ip4) + self.assertEqual(tcp.sport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + def test_lb_affinity(self): + """ NAT44ED local service load balancing affinity """ + external_addr = self.nat_addr + external_port = 80 + local_port = 8080 + server1 = self.pg0.remote_hosts[0] + server2 = self.pg0.remote_hosts[1] + + locals = [{'addr': server1.ip4, + 'port': local_port, + 'probability': 50, + 'vrf_id': 0}, + {'addr': server2.ip4, + 'port': local_port, + 'probability': 50, + 'vrf_id': 0}] + + self.nat_add_address(self.nat_addr) + self.vapi.nat44_add_del_lb_static_mapping(is_add=1, + external_addr=external_addr, + external_port=external_port, + protocol=IP_PROTOS.tcp, + affinity=10800, + local_num=len(locals), + locals=locals) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg0.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg1.sw_if_index, + is_add=1) + + p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=1025, dport=external_port)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + backend = capture[0][IP].dst + + sessions = self.vapi.nat44_user_session_dump(backend, 0) + self.assertEqual(len(sessions), 1) + self.assertTrue(sessions[0].flags & + self.config_flags.NAT_IS_EXT_HOST_VALID) + self.vapi.nat44_del_session( + address=sessions[0].inside_ip_address, + port=sessions[0].inside_port, + protocol=sessions[0].protocol, + flags=(self.config_flags.NAT_IS_INSIDE | + self.config_flags.NAT_IS_EXT_HOST_VALID), + ext_host_address=sessions[0].ext_host_address, + ext_host_port=sessions[0].ext_host_port) + + pkts = [] + for port in range(1030, 1100): + p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=port, dport=external_port)) + pkts.append(p) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + for p in capture: + self.assertEqual(p[IP].dst, backend) + + def test_multiple_vrf(self): + """ NAT44ED Multiple VRF setup """ + + external_addr = '1.2.3.4' + external_port = 80 + local_port = 8080 + port = 0 + + self.vapi.nat44_forwarding_enable_disable(enable=1) + self.nat_add_address(self.nat_addr) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg0.sw_if_index, + is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg0.sw_if_index, + is_add=1, flags=flags) + self.vapi.nat44_interface_add_del_output_feature( + sw_if_index=self.pg1.sw_if_index, + is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg5.sw_if_index, + is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg5.sw_if_index, + is_add=1, flags=flags) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg6.sw_if_index, + is_add=1) + flags = self.config_flags.NAT_IS_OUT2IN_ONLY + self.nat_add_static_mapping(self.pg5.remote_ip4, external_addr, + local_port, external_port, vrf_id=1, + proto=IP_PROTOS.tcp, flags=flags) + self.nat_add_static_mapping( + self.pg0.remote_ip4, + external_sw_if_index=self.pg0.sw_if_index, + local_port=local_port, + vrf_id=0, + external_port=external_port, + proto=IP_PROTOS.tcp, + flags=flags + ) + + # from client to service (both VRF1) + p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / + IP(src=self.pg6.remote_ip4, dst=external_addr) / + TCP(sport=12345, dport=external_port)) + self.pg6.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg5.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.dst, self.pg5.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service back to client (both VRF1) + p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / + IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) / + TCP(sport=local_port, dport=12345)) + self.pg5.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, external_addr) + self.assertEqual(tcp.sport, external_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # dynamic NAT from VRF1 to VRF0 (output-feature) + p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / + IP(src=self.pg5.remote_ip4, dst=self.pg1.remote_ip4) / + TCP(sport=2345, dport=22)) + self.pg5.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, self.nat_addr) + self.assert_packet_checksums_valid(p) + port = tcp.sport + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=22, dport=port)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg5.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.dst, self.pg5.remote_ip4) + self.assertEqual(tcp.dport, 2345) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from client VRF1 to service VRF0 + p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / + IP(src=self.pg6.remote_ip4, dst=self.pg0.local_ip4) / + TCP(sport=12346, dport=external_port)) + self.pg6.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.dst, self.pg0.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service VRF0 back to client VRF1 + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) / + TCP(sport=local_port, dport=12346)) + self.pg0.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.pg0.local_ip4) + self.assertEqual(tcp.sport, external_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from client VRF0 to service VRF1 + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=external_addr) / + TCP(sport=12347, dport=external_port)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg5.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.dst, self.pg5.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service VRF1 back to client VRF0 + p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / + IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) / + TCP(sport=local_port, dport=12347)) + self.pg5.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, external_addr) + self.assertEqual(tcp.sport, external_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from client to server (both VRF1, no translation) + p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / + IP(src=self.pg6.remote_ip4, dst=self.pg5.remote_ip4) / + TCP(sport=12348, dport=local_port)) + self.pg6.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg5.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.dst, self.pg5.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from server back to client (both VRF1, no translation) + p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / + IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) / + TCP(sport=local_port, dport=12348)) + self.pg5.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.pg5.remote_ip4) + self.assertEqual(tcp.sport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from client VRF1 to server VRF0 (no translation) + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) / + TCP(sport=local_port, dport=12349)) + self.pg0.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.pg0.remote_ip4) + self.assertEqual(tcp.sport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from server VRF0 back to client VRF1 (no translation) + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) / + TCP(sport=local_port, dport=12349)) + self.pg0.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.pg0.remote_ip4) + self.assertEqual(tcp.sport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from client VRF0 to server VRF1 (no translation) + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg5.remote_ip4) / + TCP(sport=12344, dport=local_port)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg5.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.dst, self.pg5.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from server VRF1 back to client VRF0 (no translation) + p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / + IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) / + TCP(sport=local_port, dport=12344)) + self.pg5.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.pg5.remote_ip4) + self.assertEqual(tcp.sport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + +class TestNAT44EDMW(TestNAT44ED): + """ NAT44ED MW Test Case """ + worker_config = "workers 1" + + def get_stats_counter(self, path, worker=1): + return super(TestNAT44EDMW, self).get_stats_counter(path, worker) + + @unittest.skip('MW fix required') + def test_users_dump(self): + """ NAT44ED API test - nat44_user_dump """ + + @unittest.skip('MW fix required') + def test_frag_out_of_order_do_not_translate(self): + """ NAT44ED don't translate fragments arriving out of order """ + + @unittest.skip('MW fix required') + def test_forwarding(self): + """ NAT44ED forwarding test """ + + @unittest.skip('MW fix required') + def test_twice_nat(self): + """ NAT44ED Twice NAT """ + + @unittest.skip('MW fix required') + def test_twice_nat_lb(self): + """ NAT44ED Twice NAT local service load balancing """ + + @unittest.skip('MW fix required') + def test_output_feature(self): + """ NAT44ED interface output feature (in2out postrouting) """ + + @unittest.skip('MW fix required') + def test_static_with_port_out2(self): + """ NAT44ED 1:1 NAPT asymmetrical rule """ + + @unittest.skip('MW fix required') + def test_output_feature_and_service2(self): + """ NAT44ED interface output feature and service host direct access """ + + @unittest.skip('MW fix required') + def test_static_lb(self): + """ NAT44ED local service load balancing """ + + @unittest.skip('MW fix required') + def test_static_lb_2(self): + """ NAT44ED local service load balancing (asymmetrical rule) """ + + @unittest.skip('MW fix required') + def test_lb_affinity(self): + """ NAT44ED local service load balancing affinity """ + + @unittest.skip('MW fix required') + def test_multiple_vrf(self): + """ NAT44ED Multiple VRF setup """ + + @unittest.skip('MW fix required') + def test_self_twice_nat_positive(self): + """ NAT44ED Self Twice NAT (positive test) """ + + @unittest.skip('MW fix required') + def test_self_twice_nat_lb_positive(self): + """ NAT44ED Self Twice NAT local service load balancing (positive test) + """ + + def test_dynamic(self): + """ NAT44ED dynamic translation test """ + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + # in2out + tc1 = self.get_stats_counter('/nat44/ed/in2out/slowpath/tcp') + uc1 = self.get_stats_counter('/nat44/ed/in2out/slowpath/udp') + ic1 = self.get_stats_counter('/nat44/ed/in2out/slowpath/icmp') + dc1 = self.get_stats_counter('/nat44/ed/in2out/slowpath/drops') + + pkts = self.create_stream_in(self.pg0, self.pg1) + # TODO: specify worker=idx, also stats have to + # know from which worker to take capture + 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, ignore_port=True) + + if_idx = self.pg0.sw_if_index + tc2 = self.get_stats_counter('/nat44/ed/in2out/slowpath/tcp') + uc2 = self.get_stats_counter('/nat44/ed/in2out/slowpath/udp') + ic2 = self.get_stats_counter('/nat44/ed/in2out/slowpath/icmp') + dc2 = self.get_stats_counter('/nat44/ed/in2out/slowpath/drops') + + self.assertEqual(tc2[if_idx] - tc1[if_idx], 2) + self.assertEqual(uc2[if_idx] - uc1[if_idx], 1) + self.assertEqual(ic2[if_idx] - ic1[if_idx], 1) + self.assertEqual(dc2[if_idx] - dc1[if_idx], 0) + + # out2in + tc1 = self.get_stats_counter('/nat44/ed/out2in/fastpath/tcp') + uc1 = self.get_stats_counter('/nat44/ed/out2in/fastpath/udp') + ic1 = self.get_stats_counter('/nat44/ed/out2in/slowpath/icmp') + dc1 = self.get_stats_counter('/nat44/ed/out2in/fastpath/drops') + + 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) + + if_idx = self.pg1.sw_if_index + tc2 = self.get_stats_counter('/nat44/ed/out2in/fastpath/tcp') + uc2 = self.get_stats_counter('/nat44/ed/out2in/fastpath/udp') + ic2 = self.get_stats_counter('/nat44/ed/out2in/slowpath/icmp') + dc2 = self.get_stats_counter('/nat44/ed/out2in/fastpath/drops') + + self.assertEqual(tc2[if_idx] - tc1[if_idx], 2) + self.assertEqual(uc2[if_idx] - uc1[if_idx], 1) + self.assertEqual(ic2[if_idx] - ic1[if_idx], 1) + self.assertEqual(dc2[if_idx] - dc1[if_idx], 0) + + sc = self.get_stats_counter('/nat44/total-sessions') + self.assertEqual(sc[0], 3) + + def test_frag_in_order(self): + """ NAT44ED translate fragments arriving in order """ + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + self.frag_in_order(proto=IP_PROTOS.tcp, ignore_port=True) + self.frag_in_order(proto=IP_PROTOS.udp, ignore_port=True) + self.frag_in_order(proto=IP_PROTOS.icmp, ignore_port=True) + + def test_frag_in_order_do_not_translate(self): + """ NAT44ED don't translate fragments arriving in order """ + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + self.vapi.nat44_forwarding_enable_disable(enable=True) + + self.frag_in_order(proto=IP_PROTOS.tcp, dont_translate=True) + + def test_frag_out_of_order(self): + """ NAT44ED translate fragments arriving out of order """ + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + self.frag_out_of_order(proto=IP_PROTOS.tcp, ignore_port=True) + self.frag_out_of_order(proto=IP_PROTOS.udp, ignore_port=True) + self.frag_out_of_order(proto=IP_PROTOS.icmp, ignore_port=True) + + def test_frag_in_order_in_plus_out(self): + """ NAT44ED in+out interface fragments in order """ + + in_port = self.random_port() + out_port = self.random_port() + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg0) + self.nat_add_inside_interface(self.pg1) + self.nat_add_outside_interface(self.pg1) + + # add static mappings for server + self.nat_add_static_mapping(self.server_addr, + self.nat_addr, + in_port, + out_port, + proto=IP_PROTOS.tcp) + self.nat_add_static_mapping(self.server_addr, + self.nat_addr, + in_port, + out_port, + proto=IP_PROTOS.udp) + self.nat_add_static_mapping(self.server_addr, + self.nat_addr, + proto=IP_PROTOS.icmp) + + # run tests for each protocol + self.frag_in_order_in_plus_out(self.server_addr, + self.nat_addr, + in_port, + out_port, + IP_PROTOS.tcp) + self.frag_in_order_in_plus_out(self.server_addr, + self.nat_addr, + in_port, + out_port, + IP_PROTOS.udp) + self.frag_in_order_in_plus_out(self.server_addr, + self.nat_addr, + in_port, + out_port, + IP_PROTOS.icmp) + + def test_frag_out_of_order_in_plus_out(self): + """ NAT44ED in+out interface fragments out of order """ + + in_port = self.random_port() + out_port = self.random_port() + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg0) + self.nat_add_inside_interface(self.pg1) + self.nat_add_outside_interface(self.pg1) + + # add static mappings for server + self.nat_add_static_mapping(self.server_addr, + self.nat_addr, + in_port, + out_port, + proto=IP_PROTOS.tcp) + self.nat_add_static_mapping(self.server_addr, + self.nat_addr, + in_port, + out_port, + proto=IP_PROTOS.udp) + self.nat_add_static_mapping(self.server_addr, + self.nat_addr, + proto=IP_PROTOS.icmp) + + # run tests for each protocol + self.frag_out_of_order_in_plus_out(self.server_addr, + self.nat_addr, + in_port, + out_port, + IP_PROTOS.tcp) + self.frag_out_of_order_in_plus_out(self.server_addr, + self.nat_addr, + in_port, + out_port, + IP_PROTOS.udp) + self.frag_out_of_order_in_plus_out(self.server_addr, + self.nat_addr, + in_port, + out_port, + IP_PROTOS.icmp) + + def test_reass_hairpinning(self): + """ NAT44ED fragments hairpinning """ + + server_addr = self.pg0.remote_hosts[1].ip4 + + host_in_port = self.random_port() + server_in_port = self.random_port() + server_out_port = self.random_port() + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + # add static mapping for server + self.nat_add_static_mapping(server_addr, self.nat_addr, + server_in_port, server_out_port, + proto=IP_PROTOS.tcp) + self.nat_add_static_mapping(server_addr, self.nat_addr, + server_in_port, server_out_port, + proto=IP_PROTOS.udp) + self.nat_add_static_mapping(server_addr, self.nat_addr) + + self.reass_hairpinning(server_addr, server_in_port, server_out_port, + host_in_port, proto=IP_PROTOS.tcp, + ignore_port=True) + self.reass_hairpinning(server_addr, server_in_port, server_out_port, + host_in_port, proto=IP_PROTOS.udp, + ignore_port=True) + self.reass_hairpinning(server_addr, server_in_port, server_out_port, + host_in_port, proto=IP_PROTOS.icmp, + ignore_port=True) + + def test_session_limit_per_vrf(self): + """ NAT44ED per vrf session limit """ + + inside = self.pg0 + inside_vrf10 = self.pg2 + outside = self.pg1 + + limit = 5 + + # 2 interfaces pg0, pg1 (vrf10, limit 1 tcp session) + # non existing vrf_id makes process core dump + self.vapi.nat44_set_session_limit(session_limit=limit, vrf_id=10) + + self.nat_add_inside_interface(inside) + self.nat_add_inside_interface(inside_vrf10) + self.nat_add_outside_interface(outside) + + # vrf independent + self.nat_add_interface_address(outside) + + # BUG: causing core dump - when bad vrf_id is specified + # self.nat_add_address(outside.local_ip4, vrf_id=20) + + stream = self.create_tcp_stream(inside_vrf10, outside, limit * 2) + inside_vrf10.add_stream(stream) + + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + capture = outside.get_capture(limit) + + stream = self.create_tcp_stream(inside, outside, limit * 2) + inside.add_stream(stream) + + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + capture = outside.get_capture(len(stream)) + + def test_clear_sessions(self): + """ NAT44ED session clearing test """ + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + 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, ignore_port=True) + + sessions = self.get_stats_counter('/nat44/total-sessions') + self.assertTrue(sessions[0] > 0) + + self.vapi.cli("clear nat44 sessions") + + sessions = self.get_stats_counter('/nat44/total-sessions') + self.assertEqual(sessions[0], 0) + + def test_show_max_translations(self): + """ NAT44ED API test - max translations per thread """ + nat_config = self.vapi.nat_show_config_2() + self.assertEqual(self.max_sessions, + nat_config.max_translations_per_thread) + + def test_lru_cleanup(self): + """ NAT44ED LRU cleanup algorithm """ + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + self.vapi.nat_set_timeouts( + udp=1, tcp_established=7440, tcp_transitory=30, icmp=1) + + tcp_port_out = self.init_tcp_session(self.pg0, self.pg1, 2000, 80) + pkts = [] + for i in range(0, self.max_sessions - 1): + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) / + UDP(sport=7000+i, dport=80)) + pkts.append(p) + + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(len(pkts)) + self.sleep(1.5, "wait for timeouts") + + pkts = [] + for i in range(0, self.max_sessions - 1): + p = (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=8000+i, type='echo-request')) + pkts.append(p) + + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(len(pkts)) + + def test_session_rst_timeout(self): + """ NAT44ED session RST timeouts """ + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, + tcp_transitory=5, icmp=60) + + self.init_tcp_session(self.pg0, self.pg1, self.tcp_port_in, + self.tcp_external_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=self.tcp_port_in, dport=self.tcp_external_port, + flags="R")) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(1) + + self.sleep(6) + + 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 + 1, dport=self.tcp_external_port + 1, + flags="S")) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(1) + + def test_dynamic_out_of_ports(self): + """ NAT44ED dynamic translation test: out of ports """ + + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + # in2out and no NAT addresses added + err_old = self.statistics.get_err_counter( + '/err/nat44-ed-in2out-slowpath/out of ports') + + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(0, timeout=1) + + err_new = self.statistics.get_err_counter( + '/err/nat44-ed-in2out-slowpath/out of ports') + + self.assertEqual(err_new - err_old, len(pkts)) + + # in2out after NAT addresses added + self.nat_add_address(self.nat_addr) + + err_old = self.statistics.get_err_counter( + '/err/nat44-ed-in2out-slowpath/out of ports') + + 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, ignore_port=True) + + err_new = self.statistics.get_err_counter( + '/err/nat44-ed-in2out-slowpath/out of ports') + + self.assertEqual(err_new, err_old) + + def test_unknown_proto(self): + """ NAT44ED translate packet with unknown protocol """ + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + # 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.pg2.remote_ip4) / + TCP(sport=1234, dport=1234)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + p = self.pg1.get_capture(1) + packet = p[0] + try: + self.assertEqual(packet[IP].src, self.nat_addr) + self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) + self.assertEqual(packet.haslayer(GRE), 1) + self.assert_packet_checksums_valid(packet) + except: + self.logger.error(ppp("Unexpected or invalid packet:", packet)) + raise + + # out2in + p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + GRE() / + IP(src=self.pg2.remote_ip4, dst=self.pg2.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.assertEqual(packet.haslayer(GRE), 1) + self.assert_packet_checksums_valid(packet) + except: + self.logger.error(ppp("Unexpected or invalid packet:", packet)) + raise + + def test_hairpinning_unknown_proto(self): + """ NAT44ED translate packet with unknown protocol - hairpinning """ + host = self.pg0.remote_hosts[0] + server = self.pg0.remote_hosts[1] + host_in_port = 1234 + server_out_port = 8765 + server_nat_ip = "10.0.0.11" + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + # add static mapping for server + self.nat_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() + 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.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, self.nat_addr) + self.assertEqual(packet[IP].dst, server.ip4) + self.assertEqual(packet.haslayer(GRE), 1) + self.assert_packet_checksums_valid(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.pg2.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.assertEqual(packet.haslayer(GRE), 1) + self.assert_packet_checksums_valid(packet) + except: + self.logger.error(ppp("Unexpected or invalid packet:", packet)) + raise + + def test_output_feature_and_service(self): + """ NAT44ED interface output feature and services """ + external_addr = '1.2.3.4' + external_port = 80 + local_port = 8080 + + self.vapi.nat44_forwarding_enable_disable(enable=1) + self.nat_add_address(self.nat_addr) + flags = self.config_flags.NAT_IS_ADDR_ONLY + self.vapi.nat44_add_del_identity_mapping( + ip_address=self.pg1.remote_ip4, sw_if_index=0xFFFFFFFF, + flags=flags, is_add=1) + flags = self.config_flags.NAT_IS_OUT2IN_ONLY + self.nat_add_static_mapping(self.pg0.remote_ip4, external_addr, + local_port, external_port, + proto=IP_PROTOS.tcp, flags=flags) + + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg0) + self.vapi.nat44_interface_add_del_output_feature( + sw_if_index=self.pg1.sw_if_index, is_add=1) + + # from client to service + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=external_addr) / + TCP(sport=12345, dport=external_port)) + 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.dst, self.pg0.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service back to client + 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=local_port, dport=12345)) + 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, external_addr) + self.assertEqual(tcp.sport, external_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from local network host to external network + 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, ignore_port=True) + 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, ignore_port=True) + + # from external network back to local network host + 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_and_service3(self): + """ NAT44ED interface output feature and DST NAT """ + external_addr = '1.2.3.4' + external_port = 80 + local_port = 8080 + + self.vapi.nat44_forwarding_enable_disable(enable=1) + self.nat_add_address(self.nat_addr) + flags = self.config_flags.NAT_IS_OUT2IN_ONLY + self.nat_add_static_mapping(self.pg1.remote_ip4, external_addr, + local_port, external_port, + proto=IP_PROTOS.tcp, flags=flags) + + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg0) + self.vapi.nat44_interface_add_del_output_feature( + sw_if_index=self.pg1.sw_if_index, is_add=1) + + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=external_addr) / + TCP(sport=12345, 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, self.pg0.remote_ip4) + self.assertEqual(tcp.sport, 12345) + self.assertEqual(ip.dst, self.pg1.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) / + TCP(sport=local_port, dport=12345)) + 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, external_addr) + self.assertEqual(tcp.sport, external_port) + self.assertEqual(ip.dst, self.pg0.remote_ip4) + self.assertEqual(tcp.dport, 12345) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + def test_self_twice_nat_lb_negative(self): + """ NAT44ED Self Twice NAT local service load balancing (negative test) + """ + self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True, + client_id=2) + + def test_self_twice_nat_negative(self): + """ NAT44ED Self Twice NAT (negative test) """ + self.twice_nat_common(self_twice_nat=True) + + def test_static_lb_multi_clients(self): + """ NAT44ED local service load balancing - multiple clients""" + + external_addr = self.nat_addr + external_port = 80 + local_port = 8080 + server1 = self.pg0.remote_hosts[0] + server2 = self.pg0.remote_hosts[1] + server3 = self.pg0.remote_hosts[2] + + locals = [{'addr': server1.ip4, + 'port': local_port, + 'probability': 90, + 'vrf_id': 0}, + {'addr': server2.ip4, + 'port': local_port, + 'probability': 10, + 'vrf_id': 0}] + + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg0.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg1.sw_if_index, + is_add=1) + + self.nat_add_address(self.nat_addr) + self.vapi.nat44_add_del_lb_static_mapping(is_add=1, + external_addr=external_addr, + external_port=external_port, + protocol=IP_PROTOS.tcp, + local_num=len(locals), + locals=locals) + + server1_n = 0 + server2_n = 0 + clients = ip4_range(self.pg1.remote_ip4, 10, 50) + pkts = [] + for client in clients: + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=client, dst=self.nat_addr) / + TCP(sport=12345, dport=external_port)) + pkts.append(p) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + for p in capture: + if p[IP].dst == server1.ip4: + server1_n += 1 + else: + server2_n += 1 + self.assertGreater(server1_n, server2_n) + + local = { + 'addr': server3.ip4, + 'port': local_port, + 'probability': 20, + 'vrf_id': 0 + } + + # add new back-end + self.vapi.nat44_lb_static_mapping_add_del_local( + is_add=1, + external_addr=external_addr, + external_port=external_port, + local=local, + protocol=IP_PROTOS.tcp) + server1_n = 0 + server2_n = 0 + server3_n = 0 + clients = ip4_range(self.pg1.remote_ip4, 60, 110) + pkts = [] + for client in clients: + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=client, dst=self.nat_addr) / + TCP(sport=12346, dport=external_port)) + pkts.append(p) + self.assertGreater(len(pkts), 0) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + for p in capture: + if p[IP].dst == server1.ip4: + server1_n += 1 + elif p[IP].dst == server2.ip4: + server2_n += 1 + else: + server3_n += 1 + self.assertGreater(server1_n, 0) + self.assertGreater(server2_n, 0) + self.assertGreater(server3_n, 0) + + local = { + 'addr': server2.ip4, + 'port': local_port, + 'probability': 10, + 'vrf_id': 0 + } + + # remove one back-end + self.vapi.nat44_lb_static_mapping_add_del_local( + is_add=0, + external_addr=external_addr, + external_port=external_port, + local=local, + protocol=IP_PROTOS.tcp) + server1_n = 0 + server2_n = 0 + server3_n = 0 + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + for p in capture: + if p[IP].dst == server1.ip4: + server1_n += 1 + elif p[IP].dst == server2.ip4: + server2_n += 1 + else: + server3_n += 1 + self.assertGreater(server1_n, 0) + self.assertEqual(server2_n, 0) + self.assertGreater(server3_n, 0) + + def test_syslog_sess(self): + """ NAT44ED Test syslog session creation and deletion """ + self.vapi.syslog_set_filter( + self.syslog_severity.SYSLOG_API_SEVERITY_INFO) + self.vapi.syslog_set_sender(self.pg3.local_ip4, self.pg3.remote_ip4) + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + + 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=self.tcp_external_port)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(1) + self.tcp_port_out = capture[0][TCP].sport + capture = self.pg3.get_capture(1) + self.verify_syslog_sess(capture[0][Raw].load) + + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.nat_add_address(self.nat_addr, is_add=0) + capture = self.pg3.get_capture(1) + self.verify_syslog_sess(capture[0][Raw].load, False) + + def test_twice_nat_interface_addr(self): + """ NAT44ED Acquire twice NAT addresses from interface """ + flags = self.config_flags.NAT_IS_TWICE_NAT + self.vapi.nat44_add_del_interface_addr( + sw_if_index=self.pg11.sw_if_index, + flags=flags, is_add=1) + + # 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.pg11.config_ip4() + adresses = self.vapi.nat44_address_dump() + self.assertEqual(1, len(adresses)) + self.assertEqual(str(adresses[0].ip_address), + self.pg11.local_ip4) + self.assertEqual(adresses[0].flags, flags) + + # remove interface address and check NAT address pool + self.pg11.unconfig_ip4() + adresses = self.vapi.nat44_address_dump() + self.assertEqual(0, len(adresses)) + + def test_output_feature_stateful_acl(self): + """ NAT44ED output feature works with stateful ACL """ + + self.nat_add_address(self.nat_addr) + self.vapi.nat44_interface_add_del_output_feature( + sw_if_index=self.pg0.sw_if_index, + flags=self.config_flags.NAT_IS_INSIDE, is_add=1) + self.vapi.nat44_interface_add_del_output_feature( + sw_if_index=self.pg1.sw_if_index, + flags=self.config_flags.NAT_IS_OUTSIDE, is_add=1) + + # First ensure that the NAT is working sans ACL + + # send packets out2in, no sessions yet so packets should drop + pkts_out2in = self.create_stream_out(self.pg1) + self.send_and_assert_no_replies(self.pg1, pkts_out2in) + + # send packets into inside intf, ensure received via outside intf + pkts_in2out = self.create_stream_in(self.pg0, self.pg1) + capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1, + len(pkts_in2out)) + self.verify_capture_out(capture, ignore_port=True) + + # send out2in again, with sessions created it should work now + pkts_out2in = self.create_stream_out(self.pg1) + capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0, + len(pkts_out2in)) + self.verify_capture_in(capture, self.pg0) + + # Create an ACL blocking everything + out2in_deny_rule = AclRule(is_permit=0) + out2in_acl = VppAcl(self, rules=[out2in_deny_rule]) + out2in_acl.add_vpp_config() + + # create an ACL to permit/reflect everything + in2out_reflect_rule = AclRule(is_permit=2) + in2out_acl = VppAcl(self, rules=[in2out_reflect_rule]) + in2out_acl.add_vpp_config() + + # apply as input acl on interface and confirm it blocks everything + acl_if = VppAclInterface(self, sw_if_index=self.pg1.sw_if_index, + n_input=1, acls=[out2in_acl]) + acl_if.add_vpp_config() + self.send_and_assert_no_replies(self.pg1, pkts_out2in) + + # apply output acl + acl_if.acls = [out2in_acl, in2out_acl] + acl_if.add_vpp_config() + # send in2out to generate ACL state (NAT state was created earlier) + capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1, + len(pkts_in2out)) + self.verify_capture_out(capture, ignore_port=True) + + # send out2in again. ACL state exists so it should work now. + # TCP packets with the syn flag set also need the ack flag + for p in pkts_out2in: + if p.haslayer(TCP) and p[TCP].flags & 0x02: + p[TCP].flags |= 0x10 + capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0, + len(pkts_out2in)) + self.verify_capture_in(capture, self.pg0) + self.logger.info(self.vapi.cli("show trace")) + + def test_tcp_close(self): + """ NAT44ED Close TCP session from inside network - output feature """ + old_timeouts = self.vapi.nat_get_timeouts() + new_transitory = 2 + self.vapi.nat_set_timeouts( + udp=old_timeouts.udp, + tcp_established=old_timeouts.tcp_established, + icmp=old_timeouts.icmp, + tcp_transitory=new_transitory) + + self.vapi.nat44_forwarding_enable_disable(enable=1) + self.nat_add_address(self.pg1.local_ip4) + twice_nat_addr = '10.0.1.3' + service_ip = '192.168.16.150' + self.nat_add_address(twice_nat_addr, twice_nat=1) + + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg0.sw_if_index, + is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg0.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_output_feature( + is_add=1, + sw_if_index=self.pg1.sw_if_index) + + flags = (self.config_flags.NAT_IS_OUT2IN_ONLY | + self.config_flags.NAT_IS_TWICE_NAT) + self.nat_add_static_mapping(self.pg0.remote_ip4, + service_ip, 80, 80, + proto=IP_PROTOS.tcp, + flags=flags) + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + start_sessnum = len(sessions) + + # SYN packet out->in + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=service_ip) / + TCP(sport=33898, dport=80, flags="S")) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + p = capture[0] + tcp_port = p[TCP].sport + + # SYN + ACK packet in->out + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) / + TCP(sport=80, dport=tcp_port, flags="SA")) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(1) + + # ACK packet out->in + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=service_ip) / + TCP(sport=33898, dport=80, flags="A")) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.get_capture(1) + + # FIN packet in -> out + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) / + TCP(sport=80, dport=tcp_port, flags="FA", seq=100, ack=300)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(1) + + # FIN+ACK packet out -> in + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=service_ip) / + TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.get_capture(1) + + # ACK packet in -> out + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) / + TCP(sport=80, dport=tcp_port, flags="A", seq=101, ack=301)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(1) + + # session now in transitory timeout + # try SYN packet out->in - should be dropped + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=service_ip) / + TCP(sport=33898, dport=80, flags="S")) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + self.sleep(new_transitory, "wait for transitory timeout") + self.pg0.assert_nothing_captured(0) + + # session should still exist + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions) - start_sessnum, 1) + + # send FIN+ACK packet out -> in - will cause session to be wiped + # but won't create a new session + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=service_ip) / + TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions) - start_sessnum, 0) + self.pg0.assert_nothing_captured(0) + + def test_tcp_session_close_in(self): + """ NAT44ED Close TCP session from inside network """ + + in_port = self.tcp_port_in + out_port = 10505 + ext_port = self.tcp_external_port + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + in_port, out_port, proto=IP_PROTOS.tcp, + flags=self.config_flags.NAT_IS_TWICE_NAT) + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + session_n = len(sessions) + + self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, + tcp_transitory=2, icmp=5) + + self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port) + + # 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=in_port, dport=ext_port, + flags="FA", seq=100, ack=300)) + 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=ext_port, dport=out_port, + flags="A", seq=300, ack=101)) + 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=ext_port, dport=out_port, + flags="FA", seq=300, ack=101)) + 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=in_port, dport=ext_port, + flags="A", seq=101, ack=301)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(1) + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions) - session_n, 1) + + out2in_drops = self.get_err_counter( + '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') + in2out_drops = self.get_err_counter( + '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') + + # extra FIN packet out -> in - this should be dropped + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=ext_port, dport=out_port, + flags="FA", seq=300, ack=101)) + + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.assert_nothing_captured() + + # extra ACK packet in -> out - this should be dropped + 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=in_port, dport=ext_port, + flags="A", seq=101, ack=301)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + + stats = self.get_err_counter( + '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') + self.assertEqual(stats - out2in_drops, 1) + stats = self.get_err_counter( + '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') + self.assertEqual(stats - in2out_drops, 1) + + self.sleep(3) + # extra ACK packet in -> out - this will cause session to be wiped + 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=in_port, dport=ext_port, + flags="A", seq=101, ack=301)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions) - session_n, 0) + + def test_tcp_session_close_out(self): + """ NAT44ED Close TCP session from outside network """ + + in_port = self.tcp_port_in + out_port = 10505 + ext_port = self.tcp_external_port + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + in_port, out_port, proto=IP_PROTOS.tcp, + flags=self.config_flags.NAT_IS_TWICE_NAT) + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + session_n = len(sessions) + + self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, + tcp_transitory=2, icmp=5) + + _ = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port) + + # 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=ext_port, dport=out_port, + flags="FA", seq=100, ack=300)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.get_capture(1) + + # FIN+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=in_port, dport=ext_port, + flags="FA", seq=300, ack=101)) + + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(1) + + # 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=ext_port, dport=out_port, + flags="A", seq=101, ack=301)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.get_capture(1) + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions) - session_n, 1) + + out2in_drops = self.get_err_counter( + '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') + in2out_drops = self.get_err_counter( + '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') + + # extra FIN packet out -> in - this should be dropped + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=ext_port, dport=out_port, + flags="FA", seq=300, ack=101)) + + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.assert_nothing_captured() + + # extra ACK packet in -> out - this should be dropped + 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=in_port, dport=ext_port, + flags="A", seq=101, ack=301)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + + stats = self.get_err_counter( + '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') + self.assertEqual(stats - out2in_drops, 1) + stats = self.get_err_counter( + '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') + self.assertEqual(stats - in2out_drops, 1) + + self.sleep(3) + # extra ACK packet in -> out - this will cause session to be wiped + 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=in_port, dport=ext_port, + flags="A", seq=101, ack=301)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions) - session_n, 0) + + def test_tcp_session_close_simultaneous(self): + """ NAT44ED Close TCP session from inside network """ + + in_port = self.tcp_port_in + ext_port = 10505 + + self.nat_add_address(self.nat_addr) + self.nat_add_inside_interface(self.pg0) + self.nat_add_outside_interface(self.pg1) + self.nat_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + in_port, ext_port, proto=IP_PROTOS.tcp, + flags=self.config_flags.NAT_IS_TWICE_NAT) + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + session_n = len(sessions) + + self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, + tcp_transitory=2, icmp=5) + + out_port = self.init_tcp_session(self.pg0, self.pg1, in_port, ext_port) + + # 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=in_port, dport=ext_port, + flags="FA", seq=100, ack=300)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(1) + + # 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=ext_port, dport=out_port, + flags="FA", seq=300, ack=100)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.get_capture(1) + + # 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=in_port, dport=ext_port, + flags="A", seq=101, ack=301)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(1) + + # 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=ext_port, dport=out_port, + flags="A", seq=301, ack=101)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.get_capture(1) + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions) - session_n, 1) + + out2in_drops = self.get_err_counter( + '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') + in2out_drops = self.get_err_counter( + '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') + + # extra FIN packet out -> in - this should be dropped + p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=ext_port, dport=out_port, + flags="FA", seq=300, ack=101)) + + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.assert_nothing_captured() + + # extra ACK packet in -> out - this should be dropped + 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=in_port, dport=ext_port, + flags="A", seq=101, ack=301)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + + stats = self.get_err_counter( + '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') + self.assertEqual(stats - out2in_drops, 1) + stats = self.get_err_counter( + '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') + self.assertEqual(stats - in2out_drops, 1) + + self.sleep(3) + # extra ACK packet in -> out - this will cause session to be wiped + 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=in_port, dport=ext_port, + flags="A", seq=101, ack=301)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions) - session_n, 0) + + def test_dynamic_output_feature_vrf(self): + """ NAT44ED dynamic translation test: output-feature, VRF""" + + # other then default (0) + new_vrf_id = 22 + + self.nat_add_address(self.nat_addr) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_output_feature( + sw_if_index=self.pg7.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_output_feature( + sw_if_index=self.pg8.sw_if_index, + is_add=1) + + try: + self.configure_ip4_interface(self.pg7, table_id=new_vrf_id) + self.configure_ip4_interface(self.pg8, table_id=new_vrf_id) + + # in2out + tcpn = self.get_stats_counter( + '/nat44/ed/in2out/slowpath/tcp') + udpn = self.get_stats_counter( + '/nat44/ed/in2out/slowpath/udp') + icmpn = self.get_stats_counter( + '/nat44/ed/in2out/slowpath/icmp') + drops = self.get_stats_counter( + '/nat44/ed/in2out/slowpath/drops') + + 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, ignore_port=True) + + if_idx = self.pg7.sw_if_index + cnt = self.get_stats_counter( + '/nat44/ed/in2out/slowpath/tcp') + self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2) + cnt = self.get_stats_counter( + '/nat44/ed/in2out/slowpath/udp') + self.assertEqual(cnt[if_idx] - udpn[if_idx], 1) + cnt = self.get_stats_counter( + '/nat44/ed/in2out/slowpath/icmp') + self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1) + cnt = self.get_stats_counter( + '/nat44/ed/in2out/slowpath/drops') + self.assertEqual(cnt[if_idx] - drops[if_idx], 0) + + # out2in + tcpn = self.get_stats_counter( + '/nat44/ed/out2in/fastpath/tcp') + udpn = self.get_stats_counter( + '/nat44/ed/out2in/fastpath/udp') + icmpn = self.get_stats_counter( + '/nat44/ed/out2in/slowpath/icmp') + drops = self.get_stats_counter( + '/nat44/ed/out2in/fastpath/drops') + + 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) + + if_idx = self.pg8.sw_if_index + cnt = self.get_stats_counter( + '/nat44/ed/out2in/fastpath/tcp') + self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2) + cnt = self.get_stats_counter( + '/nat44/ed/out2in/fastpath/udp') + self.assertEqual(cnt[if_idx] - udpn[if_idx], 1) + cnt = self.get_stats_counter( + '/nat44/ed/out2in/slowpath/icmp') + self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1) + cnt = self.get_stats_counter( + '/nat44/ed/out2in/fastpath/drops') + self.assertEqual(cnt[if_idx] - drops[if_idx], 0) + + sessions = self.get_stats_counter('/nat44/total-sessions') + self.assertEqual(sessions[0], 3) + + finally: + self.configure_ip4_interface(self.pg7, table_id=0) + self.configure_ip4_interface(self.pg8, table_id=0) + + self.vapi.ip_table_add_del(is_add=0, + table={'table_id': new_vrf_id}) + + def test_next_src_nat(self): + """ NAT44ED On way back forward packet to nat44-in2out node. """ + + twice_nat_addr = '10.0.1.3' + external_port = 80 + local_port = 8080 + post_twice_nat_port = 0 + + self.vapi.nat44_forwarding_enable_disable(enable=1) + self.nat_add_address(twice_nat_addr, twice_nat=1) + flags = (self.config_flags.NAT_IS_OUT2IN_ONLY | + self.config_flags.NAT_IS_SELF_TWICE_NAT) + self.nat_add_static_mapping(self.pg6.remote_ip4, self.pg1.remote_ip4, + local_port, external_port, + proto=IP_PROTOS.tcp, vrf_id=1, + flags=flags) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg6.sw_if_index, + is_add=1) + + p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / + IP(src=self.pg6.remote_ip4, dst=self.pg1.remote_ip4) / + TCP(sport=12345, dport=external_port)) + self.pg6.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, twice_nat_addr) + self.assertNotEqual(tcp.sport, 12345) + post_twice_nat_port = tcp.sport + self.assertEqual(ip.dst, self.pg6.remote_ip4) + self.assertEqual(tcp.dport, local_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / + IP(src=self.pg6.remote_ip4, dst=twice_nat_addr) / + TCP(sport=local_port, dport=post_twice_nat_port)) + self.pg6.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.pg1.remote_ip4) + self.assertEqual(tcp.sport, external_port) + self.assertEqual(ip.dst, self.pg6.remote_ip4) + self.assertEqual(tcp.dport, 12345) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + def test_one_armed_nat44_static(self): + """ NAT44ED One armed NAT and 1:1 NAPT asymmetrical rule """ + + remote_host = self.pg4.remote_hosts[0] + local_host = self.pg4.remote_hosts[1] + external_port = 80 + local_port = 8080 + eh_port_in = 0 + + self.vapi.nat44_forwarding_enable_disable(enable=1) + self.nat_add_address(self.nat_addr, twice_nat=1) + flags = (self.config_flags.NAT_IS_OUT2IN_ONLY | + self.config_flags.NAT_IS_TWICE_NAT) + self.nat_add_static_mapping(local_host.ip4, self.nat_addr, + local_port, external_port, + proto=IP_PROTOS.tcp, flags=flags) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg4.sw_if_index, + is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg4.sw_if_index, + flags=flags, is_add=1) + + # from client to service + p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / + IP(src=remote_host.ip4, dst=self.nat_addr) / + TCP(sport=12345, dport=external_port)) + self.pg4.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg4.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.dst, local_host.ip4) + self.assertEqual(ip.src, self.nat_addr) + self.assertEqual(tcp.dport, local_port) + self.assertNotEqual(tcp.sport, 12345) + eh_port_in = tcp.sport + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # from service back to client + p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / + IP(src=local_host.ip4, dst=self.nat_addr) / + TCP(sport=local_port, dport=eh_port_in)) + self.pg4.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg4.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.src, self.nat_addr) + self.assertEqual(ip.dst, remote_host.ip4) + self.assertEqual(tcp.sport, external_port) + self.assertEqual(tcp.dport, 12345) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + +if __name__ == '__main__': + unittest.main(testRunner=VppTestRunner) diff --git a/src/plugins/nat/test/test_nat44.py b/src/plugins/nat/test/test_nat44_ei.py index 0dcf6d5f2ab..16a3376e9b2 100644 --- a/src/plugins/nat/test/test_nat44.py +++ b/src/plugins/nat/test/test_nat44_ei.py @@ -9,7 +9,7 @@ from io import BytesIO from time import sleep import scapy.compat -from framework import VppTestCase, VppTestRunner, running_extended_tests +from framework import VppTestCase, VppTestRunner from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder from scapy.all import bind_layers, Packet, ByteEnumField, ShortField, \ IPField, IntField, LongField, XByteField, FlagsField, FieldLenField, \ @@ -17,16 +17,12 @@ from scapy.all import bind_layers, Packet, ByteEnumField, ShortField, \ from scapy.data import IP_PROTOS from scapy.layers.inet import IP, TCP, UDP, ICMP from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror -from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6, IPv6ExtHdrFragment -from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6EchoReply, \ - ICMPv6ND_NS, ICMPv6ND_NA, ICMPv6NDOptDstLLAddr, fragment6 +from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6EchoReply from scapy.layers.l2 import Ether, ARP, GRE from scapy.packet import Raw from syslog_rfc5424_parser import SyslogMessage, ParseError from syslog_rfc5424_parser.constants import SyslogSeverity -from util import ip4_range -from util import ppc, ppp -from vpp_acl import AclRule, VppAcl, VppAclInterface +from util import ppp from vpp_ip_route import VppIpRoute, VppRoutePath from vpp_neighbor import VppNeighbor from vpp_papi import VppEnum @@ -88,7 +84,7 @@ class MethodHolder(VppTestCase): is_add=1, external_sw_if_index=0xFFFFFFFF, proto=0, tag="", flags=0): """ - Add/delete NAT44 static mapping + Add/delete NAT44EI static mapping :param local_ip: Local IP address :param external_ip: External IP address @@ -118,7 +114,7 @@ class MethodHolder(VppTestCase): def nat44_add_address(self, ip, is_add=1, vrf_id=0xFFFFFFFF, twice_nat=0): """ - Add/delete NAT44 address + Add/delete NAT44EI address :param ip: IP address :param is_add: 1 if add, 0 if delete (Default add) @@ -131,6 +127,29 @@ class MethodHolder(VppTestCase): is_add=is_add, flags=flags) + def create_routes_and_neigbors(self): + r1 = VppIpRoute(self, self.pg7.remote_ip4, 32, + [VppRoutePath(self.pg7.remote_ip4, + self.pg7.sw_if_index)]) + r2 = VppIpRoute(self, self.pg8.remote_ip4, 32, + [VppRoutePath(self.pg8.remote_ip4, + self.pg8.sw_if_index)]) + r1.add_vpp_config() + r2.add_vpp_config() + + n1 = VppNeighbor(self, + self.pg7.sw_if_index, + self.pg7.remote_mac, + self.pg7.remote_ip4, + is_static=1) + n2 = VppNeighbor(self, + self.pg8.sw_if_index, + self.pg8.remote_mac, + self.pg8.remote_ip4, + is_static=1) + n1.add_vpp_config() + n2.add_vpp_config() + def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64): """ Create packet stream for inside network @@ -208,48 +227,6 @@ class MethodHolder(VppTestCase): packed_pref_n = b''.join([scapy.compat.chb(x) for x in pref_n]) return socket.inet_ntop(socket.AF_INET6, packed_pref_n) - def extract_ip4(self, ip6, plen): - """ - Extract IPv4 address embedded in IPv6 addresses - - :param ip6: IPv6 address - :param plen: IPv6 prefix length - :returns: extracted IPv4 address - """ - ip6_n = list(socket.inet_pton(socket.AF_INET6, ip6)) - ip4_n = [None] * 4 - if plen == 32: - ip4_n[0] = ip6_n[4] - ip4_n[1] = ip6_n[5] - ip4_n[2] = ip6_n[6] - ip4_n[3] = ip6_n[7] - elif plen == 40: - ip4_n[0] = ip6_n[5] - ip4_n[1] = ip6_n[6] - ip4_n[2] = ip6_n[7] - ip4_n[3] = ip6_n[9] - elif plen == 48: - ip4_n[0] = ip6_n[6] - ip4_n[1] = ip6_n[7] - ip4_n[2] = ip6_n[9] - ip4_n[3] = ip6_n[10] - elif plen == 56: - ip4_n[0] = ip6_n[7] - ip4_n[1] = ip6_n[9] - ip4_n[2] = ip6_n[10] - ip4_n[3] = ip6_n[11] - elif plen == 64: - ip4_n[0] = ip6_n[9] - ip4_n[1] = ip6_n[10] - ip4_n[2] = ip6_n[11] - ip4_n[3] = ip6_n[12] - elif plen == 96: - ip4_n[0] = ip6_n[12] - ip4_n[1] = ip6_n[13] - ip4_n[2] = ip6_n[14] - ip4_n[3] = ip6_n[15] - return socket.inet_ntop(socket.AF_INET, ''.join(ip4_n)) - def create_stream_out(self, out_if, dst_ip=None, ttl=64, use_inside_ports=False): """ @@ -416,31 +393,6 @@ class MethodHolder(VppTestCase): "(inside network):", packet)) raise - def verify_capture_in_ip6(self, capture, src_ip, dst_ip): - """ - Verify captured IPv6 packets on inside network - - :param capture: Captured packets - :param src_ip: Source IP - :param dst_ip: Destination IP address - """ - for packet in capture: - try: - self.assertEqual(packet[IPv6].src, src_ip) - self.assertEqual(packet[IPv6].dst, dst_ip) - self.assert_packet_checksums_valid(packet) - if packet.haslayer(TCP): - self.assertEqual(packet[TCP].dport, self.tcp_port_in) - elif packet.haslayer(UDP): - self.assertEqual(packet[UDP].dport, self.udp_port_in) - else: - self.assertEqual(packet[ICMPv6EchoReply].id, - self.icmp_id_in) - except: - self.logger.error(ppp("Unexpected or invalid packet " - "(inside network):", packet)) - raise - def verify_capture_no_translation(self, capture, ingress_if, egress_if): """ Verify captured packet that don't have to be translated @@ -619,79 +571,9 @@ class MethodHolder(VppTestCase): p = (ip / ICMP(buffer.getvalue())) return p - def reass_frags_and_verify_ip6(self, frags, src, dst): - """ - Reassemble and verify fragmented packet - - :param frags: Captured fragments - :param src: Source IPv6 address to verify - :param dst: Destination IPv6 address to verify - - :returns: Reassembled IPv6 packet - """ - buffer = BytesIO() - for p in frags: - self.assertEqual(p[IPv6].src, src) - self.assertEqual(p[IPv6].dst, dst) - buffer.seek(p[IPv6ExtHdrFragment].offset * 8) - buffer.write(bytes(p[IPv6ExtHdrFragment].payload)) - ip = IPv6(src=frags[0][IPv6].src, dst=frags[0][IPv6].dst, - nh=frags[0][IPv6ExtHdrFragment].nh) - if ip.nh == IP_PROTOS.tcp: - p = (ip / TCP(buffer.getvalue())) - elif ip.nh == IP_PROTOS.udp: - p = (ip / UDP(buffer.getvalue())) - self.logger.debug(ppp("Reassembled:", p)) - self.assert_packet_checksums_valid(p) - return p - - 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_nat44_ses(self, data): """ - Verify IPFIX NAT44 session create/delete event + Verify IPFIX NAT44EI session create/delete event :param data: Decoded IPFIX data records """ @@ -735,11 +617,6 @@ class MethodHolder(VppTestCase): 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 @@ -748,12 +625,6 @@ class MethodHolder(VppTestCase): self.assertEqual(struct.pack("!I", 0), record[283]) def verify_ipfix_max_sessions(self, data, limit): - """ - Verify IPFIX maximum session entries exceeded event - - :param data: Decoded IPFIX data records - :param limit: Number of maximum session entries that can be created. - """ self.assertEqual(1, len(data)) record = data[0] # natEvent @@ -763,24 +634,8 @@ class MethodHolder(VppTestCase): # maxSessionEntries self.assertEqual(struct.pack("I", limit), record[471]) - def verify_ipfix_max_bibs(self, data, limit): - """ - Verify IPFIX maximum BIB entries exceeded event - - :param data: Decoded IPFIX data records - :param limit: Number of maximum BIB entries that can be created. - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - self.assertEqual(scapy.compat.orb(record[230]), 13) - # natQuotaExceededEvent - self.assertEqual(struct.pack("I", 2), record[466]) - # maxBIBEntries - self.assertEqual(struct.pack("I", limit), record[472]) - def verify_no_nat44_user(self): - """ Verify that there is no NAT44 user """ + """ Verify that there is no NAT44EI user """ users = self.vapi.nat44_user_dump() self.assertEqual(len(users), 0) users = self.statistics.get_counter('/nat44/total-users') @@ -788,25 +643,6 @@ class MethodHolder(VppTestCase): sessions = self.statistics.get_counter('/nat44/total-sessions') self.assertEqual(sessions[0][0], 0) - def verify_ipfix_max_entries_per_user(self, data, limit, src_addr): - """ - Verify IPFIX maximum entries per user exceeded event - - :param data: Decoded IPFIX data records - :param limit: Number of maximum entries per user - :param src_addr: IPv4 source address - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - self.assertEqual(scapy.compat.orb(record[230]), 13) - # natQuotaExceededEvent - self.assertEqual(struct.pack("I", 3), record[466]) - # maxEntriesPerUser - self.assertEqual(struct.pack("I", limit), record[473]) - # sourceIPv4Address - self.assertEqual(socket.inet_pton(socket.AF_INET, src_addr), record[8]) - def verify_syslog_apmap(self, data, is_add=True): message = data.decode('utf-8') try: @@ -830,43 +666,7 @@ class MethodHolder(VppTestCase): self.assertTrue(sd_params.get('SSUBIX') is not None) self.assertEqual(sd_params.get('SVLAN'), '0') - def verify_syslog_sess(self, data, is_add=True, is_ip6=False): - message = data.decode('utf-8') - try: - message = SyslogMessage.parse(message) - except ParseError as e: - self.logger.error(e) - raise - else: - self.assertEqual(message.severity, SyslogSeverity.info) - self.assertEqual(message.appname, 'NAT') - self.assertEqual(message.msgid, 'SADD' if is_add else 'SDEL') - sd_params = message.sd.get('nsess') - self.assertTrue(sd_params is not None) - if is_ip6: - self.assertEqual(sd_params.get('IATYP'), 'IPv6') - self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip6) - else: - self.assertEqual(sd_params.get('IATYP'), 'IPv4') - self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4) - self.assertTrue(sd_params.get('SSUBIX') is not None) - self.assertEqual(sd_params.get('ISPORT'), "%d" % self.tcp_port_in) - self.assertEqual(sd_params.get('XATYP'), 'IPv4') - self.assertEqual(sd_params.get('XSADDR'), self.nat_addr) - self.assertEqual(sd_params.get('XSPORT'), "%d" % self.tcp_port_out) - self.assertEqual(sd_params.get('PROTO'), "%d" % IP_PROTOS.tcp) - self.assertEqual(sd_params.get('SVLAN'), '0') - self.assertEqual(sd_params.get('XDADDR'), self.pg1.remote_ip4) - self.assertEqual(sd_params.get('XDPORT'), - "%d" % self.tcp_external_port) - def verify_mss_value(self, pkt, mss): - """ - Verify TCP MSS value - - :param pkt: - :param mss: - """ if not pkt.haslayer(IP) or not pkt.haslayer(TCP): raise TypeError("Not a TCP/IP packet") @@ -953,58 +753,10 @@ class MethodHolder(VppTestCase): self.assertEqual(p[layer].id, self.port_in) self.assertEqual(data, p[Raw].load) - def frag_in_order_in_plus_out(self, proto=IP_PROTOS.tcp): - layer = self.proto2layer(proto) - - if proto == IP_PROTOS.tcp: - data = b"A" * 4 + b"B" * 16 + b"C" * 3 - else: - data = b"A" * 16 + b"B" * 16 + b"C" * 3 - self.port_in = random.randint(1025, 65535) - - for i in range(2): - # out2in - pkts = self.create_stream_frag(self.pg0, self.server_out_addr, - self.port_in, self.server_out_port, - data, proto) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg1.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.pg0.remote_ip4, - self.server_in_addr) - if proto != IP_PROTOS.icmp: - self.assertEqual(p[layer].sport, self.port_in) - self.assertEqual(p[layer].dport, self.server_in_port) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) - - # in2out - if proto != IP_PROTOS.icmp: - pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4, - self.server_in_port, - p[layer].sport, data, proto) - else: - pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4, - p[layer].id, 0, data, proto, - echo_reply=True) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg0.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.server_out_addr, - self.pg0.remote_ip4) - if proto != IP_PROTOS.icmp: - self.assertEqual(p[layer].sport, self.server_out_port) - self.assertEqual(p[layer].dport, self.port_in) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) + def reass_hairpinning(self, server_addr, server_in_port, server_out_port, + host_in_port, proto=IP_PROTOS.tcp, + ignore_port=False): - def reass_hairpinning(self, proto=IP_PROTOS.tcp, ignore_port=False): layer = self.proto2layer(proto) if proto == IP_PROTOS.tcp: @@ -1015,8 +767,8 @@ class MethodHolder(VppTestCase): # send packet from host to server pkts = self.create_stream_frag(self.pg0, self.nat_addr, - self.host_in_port, - self.server_out_port, + host_in_port, + server_out_port, data, proto) self.pg0.add_stream(pkts) @@ -1025,14 +777,14 @@ class MethodHolder(VppTestCase): frags = self.pg0.get_capture(len(pkts)) p = self.reass_frags_and_verify(frags, self.nat_addr, - self.server.ip4) + server_addr) if proto != IP_PROTOS.icmp: if not ignore_port: - self.assertNotEqual(p[layer].sport, self.host_in_port) - self.assertEqual(p[layer].dport, self.server_in_port) + self.assertNotEqual(p[layer].sport, host_in_port) + self.assertEqual(p[layer].dport, server_in_port) else: if not ignore_port: - self.assertNotEqual(p[layer].id, self.host_in_port) + self.assertNotEqual(p[layer].id, host_in_port) self.assertEqual(data, p[Raw].load) def frag_out_of_order(self, proto=IP_PROTOS.tcp, dont_translate=False, @@ -1105,95 +857,16 @@ class MethodHolder(VppTestCase): self.assertEqual(p[layer].id, self.port_in) self.assertEqual(data, p[Raw].load) - def frag_out_of_order_in_plus_out(self, proto=IP_PROTOS.tcp): - layer = self.proto2layer(proto) - - if proto == IP_PROTOS.tcp: - data = b"A" * 4 + b"B" * 16 + b"C" * 3 - else: - data = b"A" * 16 + b"B" * 16 + b"C" * 3 - self.port_in = random.randint(1025, 65535) - for i in range(2): - # out2in - pkts = self.create_stream_frag(self.pg0, self.server_out_addr, - self.port_in, self.server_out_port, - data, proto) - pkts.reverse() - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg1.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.pg0.remote_ip4, - self.server_in_addr) - if proto != IP_PROTOS.icmp: - self.assertEqual(p[layer].dport, self.server_in_port) - self.assertEqual(p[layer].sport, self.port_in) - self.assertEqual(p[layer].dport, self.server_in_port) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) - - # in2out - if proto != IP_PROTOS.icmp: - pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4, - self.server_in_port, - p[layer].sport, data, proto) - else: - pkts = self.create_stream_frag(self.pg1, self.pg0.remote_ip4, - p[layer].id, 0, data, proto, - echo_reply=True) - pkts.reverse() - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg0.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.server_out_addr, - self.pg0.remote_ip4) - if proto != IP_PROTOS.icmp: - self.assertEqual(p[layer].sport, self.server_out_port) - self.assertEqual(p[layer].dport, self.port_in) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) - - -class TestNATMisc(MethodHolder): - """ NAT misc Test Cases """ - - max_translations = 10240 - max_users = 10240 - - def setUp(self): - super(TestNATMisc, self).setUp() - self.vapi.nat44_plugin_enable_disable( - sessions=self.max_translations, - users=self.max_users, enable=1) - - def tearDown(self): - super(TestNATMisc, self).tearDown() - if not self.vpp_dead: - self.vapi.nat44_plugin_enable_disable(enable=0) - self.vapi.cli("clear logging") - - def test_show_max_translations(self): - """ API test - max translations per thread """ - nat_config = self.vapi.nat_show_config_2() - self.assertEqual(self.max_translations, - nat_config.max_translations_per_thread) - - -class TestNAT44(MethodHolder): - """ NAT44 Test Cases """ +class TestNAT44EI(MethodHolder): + """ NAT44EI Test Cases """ max_translations = 10240 max_users = 10240 @classmethod def setUpClass(cls): - super(TestNAT44, cls).setUpClass() + super(TestNAT44EI, cls).setUpClass() cls.vapi.cli("set log class nat level debug") cls.tcp_port_in = 6303 @@ -1256,17 +929,13 @@ class TestNAT44(MethodHolder): cls.pg9.resolve_arp() def setUp(self): - super(TestNAT44, self).setUp() + super(TestNAT44EI, self).setUp() self.vapi.nat44_plugin_enable_disable( sessions=self.max_translations, users=self.max_users, enable=1) - @classmethod - def tearDownClass(cls): - super(TestNAT44, cls).tearDownClass() - def tearDown(self): - super(TestNAT44, self).tearDown() + super(TestNAT44EI, self).tearDown() if not self.vpp_dead: self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, src_port=self.ipfix_src_port, @@ -1278,7 +947,7 @@ class TestNAT44(MethodHolder): self.vapi.cli("clear logging") def test_clear_sessions(self): - """ NAT44 session clearing test """ + """ NAT44EI session clearing test """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -1310,7 +979,7 @@ class TestNAT44(MethodHolder): self.logger.info("sessions after clearing: %s" % sessions[0][0]) def test_dynamic(self): - """ NAT44 dynamic translation test """ + """ NAT44EI dynamic translation test """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( @@ -1372,7 +1041,7 @@ class TestNAT44(MethodHolder): self.assertEqual(sessions[0][0], 3) def test_dynamic_icmp_errors_in2out_ttl_1(self): - """ NAT44 handling of client packets with TTL=1 """ + """ NAT44EI handling of client packets with TTL=1 """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -1394,7 +1063,7 @@ class TestNAT44(MethodHolder): 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 """ + """ NAT44EI handling of server packets with TTL=1 """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -1425,7 +1094,8 @@ class TestNAT44(MethodHolder): 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 """ + """ NAT44EI handling of error responses to client packets with TTL=2 + """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -1456,7 +1126,8 @@ class TestNAT44(MethodHolder): 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 """ + """ NAT44EI handling of error responses to server packets with TTL=2 + """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -1495,7 +1166,7 @@ class TestNAT44(MethodHolder): self.verify_capture_out_with_icmp_errors(capture) def test_ping_out_interface_from_outside(self): - """ Ping NAT44 out interface from outside network """ + """ NAT44EI ping out interface from outside network """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -1526,7 +1197,7 @@ class TestNAT44(MethodHolder): raise def test_ping_internal_host_from_outside(self): - """ Ping internal host from outside network """ + """ NAT44EI ping internal host from outside network """ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -1560,7 +1231,7 @@ class TestNAT44(MethodHolder): self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp) def test_forwarding(self): - """ NAT44 forwarding test """ + """ NAT44EI forwarding test """ flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( @@ -1632,7 +1303,7 @@ class TestNAT44(MethodHolder): flags=flags) def test_static_in(self): - """ 1:1 NAT initialized from inside network """ + """ NAT44EI 1:1 NAT initialized from inside network """ nat_ip = "10.0.0.10" self.tcp_port_out = 6303 @@ -1671,7 +1342,7 @@ class TestNAT44(MethodHolder): self.verify_capture_in(capture, self.pg0) def test_static_out(self): - """ 1:1 NAT initialized from outside network """ + """ NAT44EI 1:1 NAT initialized from outside network """ nat_ip = "10.0.0.20" self.tcp_port_out = 6303 @@ -1708,7 +1379,7 @@ class TestNAT44(MethodHolder): self.verify_capture_out(capture, nat_ip, True) def test_static_with_port_in(self): - """ 1:1 NAPT initialized from inside network """ + """ NAT44EI 1:1 NAPT initialized from inside network """ self.tcp_port_out = 3606 self.udp_port_out = 3607 @@ -1749,7 +1420,7 @@ class TestNAT44(MethodHolder): self.verify_capture_in(capture, self.pg0) def test_static_with_port_out(self): - """ 1:1 NAPT initialized from outside network """ + """ NAT44EI 1:1 NAPT initialized from outside network """ self.tcp_port_out = 30606 self.udp_port_out = 30607 @@ -1790,7 +1461,7 @@ class TestNAT44(MethodHolder): self.verify_capture_out(capture) def test_static_vrf_aware(self): - """ 1:1 NAT VRF awareness """ + """ NAT44EI 1:1 NAT VRF awareness """ nat_ip1 = "10.0.0.30" nat_ip2 = "10.0.0.40" @@ -1813,7 +1484,7 @@ class TestNAT44(MethodHolder): sw_if_index=self.pg4.sw_if_index, flags=flags, is_add=1) - # inside interface VRF match NAT44 static mapping VRF + # inside interface VRF match NAT44EI static mapping VRF pkts = self.create_stream_in(self.pg4, self.pg3) self.pg4.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) @@ -1821,7 +1492,7 @@ class TestNAT44(MethodHolder): 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 + # inside interface VRF don't match NAT44EI static mapping VRF (packets # are dropped) pkts = self.create_stream_in(self.pg0, self.pg3) self.pg0.add_stream(pkts) @@ -1830,7 +1501,7 @@ class TestNAT44(MethodHolder): self.pg3.assert_nothing_captured() def test_dynamic_to_static(self): - """ Switch from dynamic translation to 1:1NAT """ + """ NAT44EI Switch from dynamic translation to 1:1NAT """ nat_ip = "10.0.0.10" self.tcp_port_out = 6303 self.udp_port_out = 6304 @@ -1865,7 +1536,7 @@ class TestNAT44(MethodHolder): self.verify_capture_out(capture, nat_ip, True) def test_identity_nat(self): - """ Identity NAT """ + """ NAT44EI Identity NAT """ flags = self.config_flags.NAT_IS_ADDR_ONLY self.vapi.nat44_add_del_identity_mapping( ip_address=self.pg0.remote_ip4, sw_if_index=0xFFFFFFFF, @@ -1908,7 +1579,8 @@ class TestNAT44(MethodHolder): self.assertEqual(len(identity_mappings), 2) def test_multiple_inside_interfaces(self): - """ NAT44 multiple non-overlapping address space inside interfaces """ + """ NAT44EI multiple non-overlapping address space inside interfaces + """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -1922,7 +1594,7 @@ class TestNAT44(MethodHolder): sw_if_index=self.pg3.sw_if_index, is_add=1) - # between two NAT44 inside interfaces (no translation) + # between two NAT44EI 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) @@ -1930,7 +1602,7 @@ class TestNAT44(MethodHolder): 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) + # from inside to interface without translation pkts = self.create_stream_in(self.pg0, self.pg2) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) @@ -1971,7 +1643,8 @@ class TestNAT44(MethodHolder): self.verify_capture_in(capture, self.pg1) def test_inside_overlapping_interfaces(self): - """ NAT44 multiple inside interfaces with overlapping address space """ + """ NAT44EI multiple inside interfaces with overlapping address space + """ static_nat_ip = "10.0.0.10" self.nat44_add_address(self.nat_addr) @@ -1991,7 +1664,7 @@ class TestNAT44(MethodHolder): self.nat44_add_static_mapping(self.pg6.remote_ip4, static_nat_ip, vrf_id=20) - # between NAT44 inside interfaces with same VRF (no translation) + # between NAT44EI 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) @@ -1999,7 +1672,7 @@ class TestNAT44(MethodHolder): 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) + # between NAT44EI 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)) @@ -2129,7 +1802,7 @@ class TestNAT44(MethodHolder): self.icmp_id_in]) def test_hairpinning(self): - """ NAT44 hairpinning - 1:1 NAPT """ + """ NAT44EI hairpinning - 1:1 NAPT """ host = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] @@ -2205,7 +1878,7 @@ class TestNAT44(MethodHolder): self.assertEqual(after[if_idx] - cnt[if_idx], 2) def test_hairpinning2(self): - """ NAT44 hairpinning - 1:1 NAT""" + """ NAT44EI hairpinning - 1:1 NAT""" server1_nat_ip = "10.0.0.10" server2_nat_ip = "10.0.0.11" @@ -2463,7 +2136,7 @@ class TestNAT44(MethodHolder): self.assertEqual(after[if_idx] - cnt[if_idx], 2) def test_interface_addr(self): - """ Acquire NAT44 addresses from interface """ + """ NAT44EI acquire addresses from interface """ self.vapi.nat44_add_del_interface_addr( is_add=1, sw_if_index=self.pg7.sw_if_index) @@ -2484,7 +2157,7 @@ class TestNAT44(MethodHolder): self.assertEqual(0, len(addresses)) def test_interface_addr_static_mapping(self): - """ Static mapping with addresses from interface """ + """ NAT44EI Static mapping with addresses from interface """ tag = "testTAG" self.vapi.nat44_add_del_interface_addr( @@ -2546,7 +2219,7 @@ class TestNAT44(MethodHolder): self.assertEqual(0, len(static_mappings)) def test_interface_addr_identity_nat(self): - """ Identity NAT with addresses from interface """ + """ NAT44EI Identity NAT with addresses from interface """ port = 53053 self.vapi.nat44_add_del_interface_addr( @@ -2587,7 +2260,7 @@ class TestNAT44(MethodHolder): identity_mappings[0].sw_if_index) def test_ipfix_nat44_sess(self): - """ IPFIX logging NAT44 session created/deleted """ + """ NAT44EI IPFIX logging NAT44EI session created/deleted """ self.ipfix_domain_id = 10 self.ipfix_src_port = 20202 collector_port = 30303 @@ -2637,7 +2310,7 @@ class TestNAT44(MethodHolder): self.verify_ipfix_nat44_ses(data) def test_ipfix_addr_exhausted(self): - """ IPFIX logging NAT addresses exhausted """ + """ NAT44EI IPFIX logging NAT addresses exhausted """ flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, @@ -2682,7 +2355,7 @@ class TestNAT44(MethodHolder): self.verify_ipfix_addr_exhausted(data) def test_ipfix_max_sessions(self): - """ IPFIX logging maximum session entries exceeded """ + """ NAT44EI IPFIX logging maximum session entries exceeded """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( @@ -2743,7 +2416,7 @@ class TestNAT44(MethodHolder): self.verify_ipfix_max_sessions(data, max_sessions) def test_syslog_apmap(self): - """ Test syslog address and port mapping creation and deletion """ + """ NAT44EI syslog address and port mapping creation and deletion """ self.vapi.syslog_set_filter( self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_INFO) self.vapi.syslog_set_sender(self.pg3.local_ip4, self.pg3.remote_ip4) @@ -2774,7 +2447,7 @@ class TestNAT44(MethodHolder): self.verify_syslog_apmap(capture[0][Raw].load, False) def test_pool_addr_fib(self): - """ NAT44 add pool addresses to FIB """ + """ NAT44EI add pool addresses to FIB """ static_addr = '10.0.0.10' self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -2786,7 +2459,7 @@ class TestNAT44(MethodHolder): is_add=1) self.nat44_add_static_mapping(self.pg0.remote_ip4, static_addr) - # NAT44 address + # NAT44EI 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)) @@ -2808,7 +2481,7 @@ class TestNAT44(MethodHolder): self.assertTrue(capture[0].haslayer(ARP)) self.assertTrue(capture[0][ARP].op, ARP.is_at) - # send ARP to non-NAT44 interface + # send ARP to non-NAT44EI 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)) @@ -2839,7 +2512,7 @@ class TestNAT44(MethodHolder): self.pg1.assert_nothing_captured() def test_vrf_mode(self): - """ NAT44 tenant VRF aware address pool mode """ + """ NAT44EI tenant VRF aware address pool mode """ vrf_id1 = 1 vrf_id2 = 2 @@ -2900,7 +2573,7 @@ class TestNAT44(MethodHolder): self.vapi.ip_table_add_del(is_add=0, table={'table_id': vrf_id2}) def test_vrf_feature_independent(self): - """ NAT44 tenant VRF independent address pool mode """ + """ NAT44EI tenant VRF independent address pool mode """ nat_ip1 = "10.0.0.10" nat_ip2 = "10.0.0.11" @@ -2934,31 +2607,8 @@ class TestNAT44(MethodHolder): capture = self.pg2.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip1) - def create_routes_and_neigbors(self): - r1 = VppIpRoute(self, self.pg7.remote_ip4, 32, - [VppRoutePath(self.pg7.remote_ip4, - self.pg7.sw_if_index)]) - r2 = VppIpRoute(self, self.pg8.remote_ip4, 32, - [VppRoutePath(self.pg8.remote_ip4, - self.pg8.sw_if_index)]) - r1.add_vpp_config() - r2.add_vpp_config() - - n1 = VppNeighbor(self, - self.pg7.sw_if_index, - self.pg7.remote_mac, - self.pg7.remote_ip4, - is_static=1) - n2 = VppNeighbor(self, - self.pg8.sw_if_index, - self.pg8.remote_mac, - self.pg8.remote_ip4, - is_static=1) - n1.add_vpp_config() - n2.add_vpp_config() - def test_dynamic_ipless_interfaces(self): - """ NAT44 interfaces without configured IP address """ + """ NAT44EI interfaces without configured IP address """ self.create_routes_and_neigbors() self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -2986,7 +2636,7 @@ class TestNAT44(MethodHolder): self.verify_capture_in(capture, self.pg7) def test_static_ipless_interfaces(self): - """ NAT44 interfaces without configured IP address - 1:1 NAT """ + """ NAT44EI interfaces without configured IP address - 1:1 NAT """ self.create_routes_and_neigbors() self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr) @@ -3015,7 +2665,7 @@ class TestNAT44(MethodHolder): 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 """ + """ NAT44EI interfaces without configured IP address - 1:1 NAPT """ self.tcp_port_out = 30606 self.udp_port_out = 30607 @@ -3057,7 +2707,7 @@ class TestNAT44(MethodHolder): self.verify_capture_out(capture) def test_static_unknown_proto(self): - """ 1:1 NAT translate packet with unknown protocol """ + """ NAT44EI 1:1 translate packet with unknown protocol """ nat_ip = "10.0.0.10" self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) flags = self.config_flags.NAT_IS_INSIDE @@ -3109,7 +2759,8 @@ class TestNAT44(MethodHolder): raise def test_hairpinning_static_unknown_proto(self): - """ 1:1 NAT translate packet with unknown protocol - hairpinning """ + """ NAT44EI 1:1 translate packet with unknown protocol - hairpinning + """ host = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] @@ -3168,7 +2819,7 @@ class TestNAT44(MethodHolder): raise def test_output_feature(self): - """ NAT44 interface output feature (in2out postrouting) """ + """ NAT44EI output feature (in2out postrouting) """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_output_feature( @@ -3206,7 +2857,7 @@ class TestNAT44(MethodHolder): self.verify_capture_no_translation(capture, self.pg2, self.pg0) def test_output_feature_vrf_aware(self): - """ NAT44 interface output feature VRF aware (in2out postrouting) """ + """ NAT44EI output feature VRF aware (in2out postrouting) """ nat_ip_vrf10 = "10.0.0.10" nat_ip_vrf20 = "10.0.0.20" @@ -3267,7 +2918,7 @@ class TestNAT44(MethodHolder): self.verify_capture_in(capture, self.pg6) def test_output_feature_hairpinning(self): - """ NAT44 interface output feature hairpinning (in2out postrouting) """ + """ NAT44EI output feature hairpinning (in2out postrouting) """ host = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] host_in_port = 1234 @@ -3333,7 +2984,7 @@ class TestNAT44(MethodHolder): raise def test_one_armed_nat44(self): - """ One armed NAT44 """ + """ NAT44EI One armed NAT """ remote_host = self.pg9.remote_hosts[0] local_host = self.pg9.remote_hosts[1] external_port = 0 @@ -3398,7 +3049,7 @@ class TestNAT44(MethodHolder): self.assertEqual(err, 1) def test_del_session(self): - """ Delete NAT44 session """ + """ NAT44EI delete session """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( @@ -3436,7 +3087,7 @@ class TestNAT44(MethodHolder): self.verify_no_nat44_user() def test_frag_in_order(self): - """ NAT44 translate fragments arriving in order """ + """ NAT44EI translate fragments arriving in order """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -3452,7 +3103,7 @@ class TestNAT44(MethodHolder): self.frag_in_order(proto=IP_PROTOS.icmp) def test_frag_forwarding(self): - """ NAT44 forwarding fragment test """ + """ NAT44EI forwarding fragment test """ self.vapi.nat44_add_del_interface_addr( is_add=1, sw_if_index=self.pg1.sw_if_index) @@ -3484,12 +3135,12 @@ class TestNAT44(MethodHolder): self.assertEqual(data, p[Raw].load) def test_reass_hairpinning(self): - """ NAT44 fragments hairpinning """ + """ NAT44EI fragments hairpinning """ - self.server = self.pg0.remote_hosts[1] - self.host_in_port = random.randint(1025, 65535) - self.server_in_port = random.randint(1025, 65535) - self.server_out_port = random.randint(1025, 65535) + server_addr = self.pg0.remote_hosts[1].ip4 + host_in_port = random.randint(1025, 65535) + server_in_port = random.randint(1025, 65535) + server_out_port = random.randint(1025, 65535) self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -3500,22 +3151,25 @@ class TestNAT44(MethodHolder): sw_if_index=self.pg1.sw_if_index, is_add=1) # add static mapping for server - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr, - self.server_in_port, - self.server_out_port, + self.nat44_add_static_mapping(server_addr, self.nat_addr, + server_in_port, + server_out_port, proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr, - self.server_in_port, - self.server_out_port, + self.nat44_add_static_mapping(server_addr, self.nat_addr, + server_in_port, + server_out_port, proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr) + self.nat44_add_static_mapping(server_addr, self.nat_addr) - self.reass_hairpinning(proto=IP_PROTOS.tcp) - self.reass_hairpinning(proto=IP_PROTOS.udp) - self.reass_hairpinning(proto=IP_PROTOS.icmp) + self.reass_hairpinning(server_addr, server_in_port, server_out_port, + host_in_port, proto=IP_PROTOS.tcp) + self.reass_hairpinning(server_addr, server_in_port, server_out_port, + host_in_port, proto=IP_PROTOS.udp) + self.reass_hairpinning(server_addr, server_in_port, server_out_port, + host_in_port, proto=IP_PROTOS.icmp) def test_frag_out_of_order(self): - """ NAT44 translate fragments arriving out of order """ + """ NAT44EI translate fragments arriving out of order """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE @@ -3531,7 +3185,7 @@ class TestNAT44(MethodHolder): self.frag_out_of_order(proto=IP_PROTOS.icmp) def test_port_restricted(self): - """ Port restricted NAT44 (MAP-E CE) """ + """ NAT44EI Port restricted NAT44EI (MAP-E CE) """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( @@ -3567,7 +3221,7 @@ class TestNAT44(MethodHolder): raise def test_port_range(self): - """ External address port range """ + """ NAT44EI External address port range """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( @@ -3596,7 +3250,7 @@ class TestNAT44(MethodHolder): self.assertLessEqual(tcp.sport, 1027) def test_multiple_outside_vrf(self): - """ Multiple outside VRF """ + """ NAT44EI Multiple outside VRF """ vrf_id1 = 1 vrf_id2 = 2 @@ -3670,7 +3324,7 @@ class TestNAT44(MethodHolder): self.pg2.resolve_arp() def test_mss_clamping(self): - """ TCP MSS clamping """ + """ NAT44EI TCP MSS clamping """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( @@ -3710,7 +3364,7 @@ class TestNAT44(MethodHolder): self.verify_mss_value(capture[0], 1400) def test_ha_send(self): - """ Send HA session synchronization events (active) """ + """ NAT44EI Send HA session synchronization events (active) """ flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, @@ -3847,7 +3501,7 @@ class TestNAT44(MethodHolder): self.assertEqual(stats[0][0], 2) def test_ha_recv(self): - """ Receive HA session synchronization events (passive) """ + """ NAT44EI Receive HA session synchronization events (passive) """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT_IS_INSIDE self.vapi.nat44_interface_add_del_feature( @@ -4047,3123 +3701,8 @@ class TestNAT44(MethodHolder): self.logger.info(self.vapi.cli("show nat ha")) -class TestNAT44EndpointDependent2(MethodHolder): - """ Endpoint-Dependent mapping and filtering test cases """ - - @classmethod - def tearDownClass(cls): - super(TestNAT44EndpointDependent2, cls).tearDownClass() - - def tearDown(self): - super(TestNAT44EndpointDependent2, self).tearDown() - - @classmethod - def create_and_add_ip4_table(cls, i, table_id): - cls.vapi.ip_table_add_del(is_add=1, table={'table_id': table_id}) - i.set_table_ip4(table_id) - - @classmethod - def setUpClass(cls): - super(TestNAT44EndpointDependent2, cls).setUpClass() - - cls.create_pg_interfaces(range(3)) - cls.interfaces = list(cls.pg_interfaces) - - cls.create_and_add_ip4_table(cls.pg1, 10) - - for i in cls.interfaces: - i.admin_up() - i.config_ip4() - i.resolve_arp() - - i.generate_remote_hosts(1) - i.configure_ipv4_neighbors() - - def setUp(self): - super(TestNAT44EndpointDependent2, self).setUp() - flags = self.nat44_config_flags.NAT44_IS_ENDPOINT_DEPENDENT - self.vapi.nat44_plugin_enable_disable(enable=1, flags=flags) - - def tearDown(self): - super(TestNAT44EndpointDependent2, self).tearDown() - if not self.vpp_dead: - self.vapi.nat44_plugin_enable_disable(enable=0) - self.vapi.cli("clear logging") - - def nat_add_inside_interface(self, i): - self.vapi.nat44_interface_add_del_feature( - flags=self.config_flags.NAT_IS_INSIDE, - sw_if_index=i.sw_if_index, is_add=1) - - def nat_add_outside_interface(self, i): - self.vapi.nat44_interface_add_del_feature( - flags=self.config_flags.NAT_IS_OUTSIDE, - sw_if_index=i.sw_if_index, is_add=1) - - def nat_add_interface_address(self, i): - self.nat_addr = i.local_ip4 - self.vapi.nat44_add_del_interface_addr( - sw_if_index=i.sw_if_index, is_add=1) - - def nat_add_address(self, address, vrf_id=0xFFFFFFFF): - self.nat_addr = address - self.nat44_add_address(address, vrf_id=vrf_id) - - def cli(self, command): - result = self.vapi.cli(command) - self.logger.info(result) - # print(result) - - def show_configuration(self): - self.cli("show interface") - self.cli("show interface address") - self.cli("show nat44 addresses") - self.cli("show nat44 interfaces") - - def create_tcp_stream(self, in_if, out_if, count): - """ - Create tcp packet stream - - :param in_if: Inside interface - :param out_if: Outside interface - :param count: count of packets to generate - """ - pkts = [] - port = 6303 - - for i in range(count): - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=64) / - TCP(sport=port + i, dport=20)) - pkts.append(p) - - return pkts - - def test_session_limit_per_vrf(self): - - inside = self.pg0 - inside_vrf10 = self.pg1 - outside = self.pg2 - - limit = 5 - - # 2 interfaces pg0, pg1 (vrf10, limit 1 tcp session) - # non existing vrf_id makes process core dump - self.vapi.nat44_set_session_limit(session_limit=limit, vrf_id=10) - - self.nat_add_inside_interface(inside) - self.nat_add_inside_interface(inside_vrf10) - self.nat_add_outside_interface(outside) - - # vrf independent - self.nat_add_interface_address(outside) - - # BUG: causing core dump - when bad vrf_id is specified - # self.nat44_add_address(outside.local_ip4, vrf_id=20) - - self.show_configuration() - - stream = self.create_tcp_stream(inside_vrf10, outside, limit * 2) - inside_vrf10.add_stream(stream) - - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - capture = outside.get_capture(limit) - - stream = self.create_tcp_stream(inside, outside, limit * 2) - inside.add_stream(stream) - - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - capture = outside.get_capture(len(stream)) - - -class TestNAT44EndpointDependent(MethodHolder): - """ Endpoint-Dependent mapping and filtering test cases """ - - @classmethod - def setUpClass(cls): - super(TestNAT44EndpointDependent, cls).setUpClass() - cls.vapi.cli("set log class nat level debug") - - 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.tcp_external_port = 80 - - cls.create_pg_interfaces(range(9)) - cls.interfaces = list(cls.pg_interfaces[0:3]) - - 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.pg3.admin_up() - - cls.pg4.generate_remote_hosts(2) - cls.pg4.config_ip4() - cls.vapi.sw_interface_add_del_address( - sw_if_index=cls.pg4.sw_if_index, - prefix="10.0.0.1/24") - - cls.pg4.admin_up() - cls.pg4.resolve_arp() - cls.pg4._remote_hosts[1]._ip4 = cls.pg4._remote_hosts[0]._ip4 - cls.pg4.resolve_arp() - - zero_ip4 = socket.inet_pton(socket.AF_INET, "0.0.0.0") - cls.vapi.ip_table_add_del(is_add=1, table={'table_id': 1}) - - cls.pg5._local_ip4 = "10.1.1.1" - cls.pg5._remote_hosts[0]._ip4 = "10.1.1.2" - cls.pg5.set_table_ip4(1) - cls.pg5.config_ip4() - cls.pg5.admin_up() - r1 = VppIpRoute(cls, cls.pg5.remote_ip4, 32, - [VppRoutePath("0.0.0.0", - cls.pg5.sw_if_index)], - table_id=1, - register=False) - r1.add_vpp_config() - - cls.pg6._local_ip4 = "10.1.2.1" - cls.pg6._remote_hosts[0]._ip4 = "10.1.2.2" - cls.pg6.set_table_ip4(1) - cls.pg6.config_ip4() - cls.pg6.admin_up() - - r2 = VppIpRoute(cls, cls.pg6.remote_ip4, 32, - [VppRoutePath("0.0.0.0", - cls.pg6.sw_if_index)], - table_id=1, - register=False) - r3 = VppIpRoute(cls, cls.pg6.remote_ip4, 16, - [VppRoutePath("0.0.0.0", - 0xffffffff, - nh_table_id=1)], - table_id=0, - register=False) - r4 = VppIpRoute(cls, "0.0.0.0", 0, - [VppRoutePath("0.0.0.0", 0xffffffff, - nh_table_id=0)], - table_id=1, - register=False) - r5 = VppIpRoute(cls, "0.0.0.0", 0, - [VppRoutePath(cls.pg1.local_ip4, - cls.pg1.sw_if_index)], - register=False) - r2.add_vpp_config() - r3.add_vpp_config() - r4.add_vpp_config() - r5.add_vpp_config() - - cls.pg5.resolve_arp() - cls.pg6.resolve_arp() - - cls.pg7.admin_up() - cls.pg7.config_ip4() - cls.pg7.resolve_arp() - cls.pg7.generate_remote_hosts(3) - cls.pg7.configure_ipv4_neighbors() - - cls.pg8.admin_up() - cls.pg8.config_ip4() - cls.pg8.resolve_arp() - - @classmethod - def tearDownClass(cls): - super(TestNAT44EndpointDependent, cls).tearDownClass() - - def setUp(self): - super(TestNAT44EndpointDependent, self).setUp() - flags = self.nat44_config_flags.NAT44_IS_ENDPOINT_DEPENDENT - self.vapi.nat44_plugin_enable_disable(enable=1, flags=flags) - self.vapi.nat_set_timeouts( - udp=300, tcp_established=7440, - tcp_transitory=240, icmp=60) - - def tearDown(self): - super(TestNAT44EndpointDependent, self).tearDown() - if not self.vpp_dead: - self.vapi.nat44_plugin_enable_disable(enable=0) - self.vapi.cli("clear logging") - - def test_frag_in_order(self): - """ NAT44 translate fragments arriving in order """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.frag_in_order(proto=IP_PROTOS.tcp, ignore_port=True) - self.frag_in_order(proto=IP_PROTOS.udp, ignore_port=True) - self.frag_in_order(proto=IP_PROTOS.icmp, ignore_port=True) - - def test_frag_in_order_dont_translate(self): - """ NAT44 don't translate fragments arriving in order """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_forwarding_enable_disable(enable=True) - self.frag_in_order(proto=IP_PROTOS.tcp, dont_translate=True) - - def test_frag_out_of_order(self): - """ NAT44 translate fragments arriving out of order """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.frag_out_of_order(proto=IP_PROTOS.tcp, ignore_port=True) - self.frag_out_of_order(proto=IP_PROTOS.udp, ignore_port=True) - self.frag_out_of_order(proto=IP_PROTOS.icmp, ignore_port=True) - - def test_frag_out_of_order_dont_translate(self): - """ NAT44 don't translate fragments arriving out of order """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_forwarding_enable_disable(enable=True) - self.frag_out_of_order(proto=IP_PROTOS.tcp, dont_translate=True) - - def test_frag_in_order_in_plus_out(self): - """ in+out interface fragments in order """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - flags=flags, is_add=1) - - self.server = self.pg1.remote_hosts[0] - - self.server_in_addr = self.server.ip4 - self.server_out_addr = '11.11.11.11' - self.server_in_port = random.randint(1025, 65535) - self.server_out_port = random.randint(1025, 65535) - - self.nat44_add_address(self.server_out_addr) - - # add static mappings for server - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - proto=IP_PROTOS.icmp) - - self.frag_in_order_in_plus_out(proto=IP_PROTOS.tcp) - self.frag_in_order_in_plus_out(proto=IP_PROTOS.udp) - self.frag_in_order_in_plus_out(proto=IP_PROTOS.icmp) - - def test_frag_out_of_order_in_plus_out(self): - """ in+out interface fragments out of order """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - flags=flags, is_add=1) - - self.server = self.pg1.remote_hosts[0] - - self.server_in_addr = self.server.ip4 - self.server_out_addr = '11.11.11.11' - self.server_in_port = random.randint(1025, 65535) - self.server_out_port = random.randint(1025, 65535) - - self.nat44_add_address(self.server_out_addr) - - # add static mappings for server - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - proto=IP_PROTOS.icmp) - - self.frag_out_of_order_in_plus_out(proto=IP_PROTOS.tcp) - self.frag_out_of_order_in_plus_out(proto=IP_PROTOS.udp) - self.frag_out_of_order_in_plus_out(proto=IP_PROTOS.icmp) - - def test_reass_hairpinning(self): - """ NAT44 fragments hairpinning """ - self.server = self.pg0.remote_hosts[1] - self.host_in_port = random.randint(1025, 65535) - self.server_in_port = random.randint(1025, 65535) - self.server_out_port = random.randint(1025, 65535) - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - # add static mapping for server - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr) - - self.reass_hairpinning(proto=IP_PROTOS.tcp, ignore_port=True) - self.reass_hairpinning(proto=IP_PROTOS.udp, ignore_port=True) - self.reass_hairpinning(proto=IP_PROTOS.icmp, ignore_port=True) - - def test_clear_sessions(self): - """ NAT44 ED session clearing test """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - nat_config = self.vapi.nat_show_config() - self.assertEqual(1, nat_config.endpoint_dependent) - - 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, ignore_port=True) - - sessions = self.statistics.get_counter('/nat44/total-sessions') - self.assertTrue(sessions[0][0] > 0) - self.logger.info("sessions before clearing: %s" % sessions[0][0]) - - # just for testing purposes - self.logger.info(self.vapi.cli("show nat44 summary")) - - self.vapi.cli("clear nat44 sessions") - - self.logger.info(self.vapi.cli("show nat44 summary")) - - sessions = self.statistics.get_counter('/nat44/total-sessions') - self.assertEqual(sessions[0][0], 0) - self.logger.info("sessions after clearing: %s" % sessions[0][0]) - - def test_dynamic(self): - """ NAT44 dynamic translation test """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - nat_config = self.vapi.nat_show_config() - self.assertEqual(1, nat_config.endpoint_dependent) - - # in2out - tcpn = self.statistics.get_counter('/nat44/ed/in2out/slowpath/tcp')[0] - udpn = self.statistics.get_counter('/nat44/ed/in2out/slowpath/udp')[0] - icmpn = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/icmp')[0] - drops = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/drops')[0] - - 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, ignore_port=True) - - if_idx = self.pg0.sw_if_index - cnt = self.statistics.get_counter('/nat44/ed/in2out/slowpath/tcp')[0] - self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2) - cnt = self.statistics.get_counter('/nat44/ed/in2out/slowpath/udp')[0] - self.assertEqual(cnt[if_idx] - udpn[if_idx], 1) - cnt = self.statistics.get_counter('/nat44/ed/in2out/slowpath/icmp')[0] - self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1) - cnt = self.statistics.get_counter('/nat44/ed/in2out/slowpath/drops')[0] - self.assertEqual(cnt[if_idx] - drops[if_idx], 0) - - # out2in - tcpn = self.statistics.get_counter('/nat44/ed/out2in/fastpath/tcp')[0] - udpn = self.statistics.get_counter('/nat44/ed/out2in/fastpath/udp')[0] - icmpn = self.statistics.get_counter( - '/nat44/ed/out2in/slowpath/icmp')[0] - drops = self.statistics.get_counter( - '/nat44/ed/out2in/fastpath/drops')[0] - - 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) - - if_idx = self.pg1.sw_if_index - cnt = self.statistics.get_counter('/nat44/ed/out2in/fastpath/tcp')[0] - self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2) - cnt = self.statistics.get_counter('/nat44/ed/out2in/fastpath/udp')[0] - self.assertEqual(cnt[if_idx] - udpn[if_idx], 1) - cnt = self.statistics.get_counter('/nat44/ed/out2in/slowpath/icmp')[0] - self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1) - cnt = self.statistics.get_counter('/nat44/ed/out2in/fastpath/drops')[0] - self.assertEqual(cnt[if_idx] - drops[if_idx], 0) - - sessions = self.statistics.get_counter('/nat44/total-sessions') - self.assertEqual(sessions[0][0], 3) - - def test_dynamic_out_of_ports(self): - """ NAT44 dynamic translation test: out of ports """ - - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - nat_config = self.vapi.nat_show_config() - self.assertEqual(1, nat_config.endpoint_dependent) - - # in2out and no NAT addresses added - err_old = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/out of ports') - - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(0, timeout=1) - - err_new = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/out of ports') - - self.assertEqual(err_new - err_old, len(pkts)) - - # in2out after NAT addresses added - self.nat44_add_address(self.nat_addr) - - err_old = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/out of ports') - - 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, ignore_port=True) - - err_new = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/out of ports') - - self.assertEqual(err_new, err_old) - - def test_dynamic_output_feature_vrf(self): - """ NAT44 dynamic translation test: output-feature, VRF""" - - # other then default (0) - new_vrf_id = 22 - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_output_feature( - sw_if_index=self.pg7.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - sw_if_index=self.pg8.sw_if_index, - is_add=1) - - try: - self.vapi.ip_table_add_del(is_add=1, - table={'table_id': new_vrf_id}) - - self.pg7.unconfig_ip4() - self.pg7.set_table_ip4(new_vrf_id) - self.pg7.config_ip4() - self.pg7.resolve_arp() - - self.pg8.unconfig_ip4() - self.pg8.set_table_ip4(new_vrf_id) - self.pg8.config_ip4() - self.pg8.resolve_arp() - - nat_config = self.vapi.nat_show_config() - self.assertEqual(1, nat_config.endpoint_dependent) - - # in2out - tcpn = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/tcp')[0] - udpn = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/udp')[0] - icmpn = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/icmp')[0] - drops = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/drops')[0] - - 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, ignore_port=True) - - if_idx = self.pg7.sw_if_index - cnt = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/tcp')[0] - self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2) - cnt = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/udp')[0] - self.assertEqual(cnt[if_idx] - udpn[if_idx], 1) - cnt = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/icmp')[0] - self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1) - cnt = self.statistics.get_counter( - '/nat44/ed/in2out/slowpath/drops')[0] - self.assertEqual(cnt[if_idx] - drops[if_idx], 0) - - # out2in - tcpn = self.statistics.get_counter( - '/nat44/ed/out2in/fastpath/tcp')[0] - udpn = self.statistics.get_counter( - '/nat44/ed/out2in/fastpath/udp')[0] - icmpn = self.statistics.get_counter( - '/nat44/ed/out2in/slowpath/icmp')[0] - drops = self.statistics.get_counter( - '/nat44/ed/out2in/fastpath/drops')[0] - - 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) - - if_idx = self.pg8.sw_if_index - cnt = self.statistics.get_counter( - '/nat44/ed/out2in/fastpath/tcp')[0] - self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2) - cnt = self.statistics.get_counter( - '/nat44/ed/out2in/fastpath/udp')[0] - self.assertEqual(cnt[if_idx] - udpn[if_idx], 1) - cnt = self.statistics.get_counter( - '/nat44/ed/out2in/slowpath/icmp')[0] - self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1) - cnt = self.statistics.get_counter( - '/nat44/ed/out2in/fastpath/drops')[0] - self.assertEqual(cnt[if_idx] - drops[if_idx], 0) - - sessions = self.statistics.get_counter('/nat44/total-sessions') - self.assertEqual(sessions[0][0], 3) - - finally: - self.pg7.unconfig_ip4() - self.pg7.set_table_ip4(1) - self.pg7.config_ip4() - self.pg7.resolve_arp() - - self.pg8.unconfig_ip4() - self.pg8.set_table_ip4(1) - self.pg8.config_ip4() - self.pg8.resolve_arp() - - self.vapi.ip_table_add_del(is_add=0, - table={'table_id': new_vrf_id}) - - def test_forwarding(self): - """ NAT44 forwarding test """ - - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_forwarding_enable_disable(enable=1) - - real_ip = self.pg0.remote_ip4 - alias_ip = self.nat_addr - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_static_mapping(is_add=1, - local_ip_address=real_ip, - external_ip_address=alias_ip, - external_sw_if_index=0xFFFFFFFF, - flags=flags) - - try: - # in2out - static mapping match - - 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) - - 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, same_port=True) - - # in2out - no static mapping match - - host0 = self.pg0.remote_hosts[0] - self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1] - try: - pkts = self.create_stream_out(self.pg1, - dst_ip=self.pg0.remote_ip4, - use_inside_ports=True) - 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) - - 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=self.pg0.remote_ip4, - same_port=True) - finally: - self.pg0.remote_hosts[0] = host0 - - user = self.pg0.remote_hosts[1] - sessions = self.vapi.nat44_user_session_dump(user.ip4, 0) - self.assertEqual(len(sessions), 3) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_EXT_HOST_VALID) - self.vapi.nat44_del_session( - address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=(self.config_flags.NAT_IS_INSIDE | - self.config_flags.NAT_IS_EXT_HOST_VALID), - ext_host_address=sessions[0].ext_host_address, - ext_host_port=sessions[0].ext_host_port) - sessions = self.vapi.nat44_user_session_dump(user.ip4, 0) - self.assertEqual(len(sessions), 2) - - finally: - self.vapi.nat44_forwarding_enable_disable(enable=0) - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_static_mapping( - is_add=0, - local_ip_address=real_ip, - external_ip_address=alias_ip, - external_sw_if_index=0xFFFFFFFF, - flags=flags) - - def test_static_lb(self): - """ NAT44 local service load balancing """ - external_addr_n = self.nat_addr - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - - locals = [{'addr': server1.ip4, - 'port': local_port, - 'probability': 70, - 'vrf_id': 0}, - {'addr': server2.ip4, - 'port': local_port, - 'probability': 30, - 'vrf_id': 0}] - - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_add_del_lb_static_mapping( - is_add=1, - external_addr=external_addr_n, - external_port=external_port, - protocol=IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # from client to service - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - server = None - try: - ip = p[IP] - tcp = p[TCP] - self.assertIn(ip.dst, [server1.ip4, server2.ip4]) - if ip.dst == server1.ip4: - server = server1 - else: - server = server2 - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - p = (Ether(src=server.mac, dst=self.pg0.local_mac) / - IP(src=server.ip4, dst=self.pg1.remote_ip4) / - TCP(sport=local_port, dport=12345)) - 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, self.nat_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - sessions = self.vapi.nat44_user_session_dump(server.ip4, 0) - self.assertEqual(len(sessions), 1) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_EXT_HOST_VALID) - self.vapi.nat44_del_session( - address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=(self.config_flags.NAT_IS_INSIDE | - self.config_flags.NAT_IS_EXT_HOST_VALID), - ext_host_address=sessions[0].ext_host_address, - ext_host_port=sessions[0].ext_host_port) - sessions = self.vapi.nat44_user_session_dump(server.ip4, 0) - self.assertEqual(len(sessions), 0) - - def test_static_lb_multi_clients(self): - """ NAT44 local service load balancing - multiple clients""" - - external_addr = self.nat_addr - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - server3 = self.pg0.remote_hosts[2] - - locals = [{'addr': server1.ip4, - 'port': local_port, - 'probability': 90, - 'vrf_id': 0}, - {'addr': server2.ip4, - 'port': local_port, - 'probability': 10, - 'vrf_id': 0}] - - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_add_del_lb_static_mapping(is_add=1, - external_addr=external_addr, - external_port=external_port, - protocol=IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - - server1_n = 0 - server2_n = 0 - clients = ip4_range(self.pg1.remote_ip4, 10, 50) - pkts = [] - for client in clients: - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=client, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - pkts.append(p) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for p in capture: - if p[IP].dst == server1.ip4: - server1_n += 1 - else: - server2_n += 1 - self.assertGreater(server1_n, server2_n) - - local = { - 'addr': server3.ip4, - 'port': local_port, - 'probability': 20, - 'vrf_id': 0 - } - - # add new back-end - self.vapi.nat44_lb_static_mapping_add_del_local( - is_add=1, - external_addr=external_addr, - external_port=external_port, - local=local, - protocol=IP_PROTOS.tcp) - server1_n = 0 - server2_n = 0 - server3_n = 0 - clients = ip4_range(self.pg1.remote_ip4, 60, 110) - pkts = [] - for client in clients: - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=client, dst=self.nat_addr) / - TCP(sport=12346, dport=external_port)) - pkts.append(p) - self.assertGreater(len(pkts), 0) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for p in capture: - if p[IP].dst == server1.ip4: - server1_n += 1 - elif p[IP].dst == server2.ip4: - server2_n += 1 - else: - server3_n += 1 - self.assertGreater(server1_n, 0) - self.assertGreater(server2_n, 0) - self.assertGreater(server3_n, 0) - - local = { - 'addr': server2.ip4, - 'port': local_port, - 'probability': 10, - 'vrf_id': 0 - } - - # remove one back-end - self.vapi.nat44_lb_static_mapping_add_del_local( - is_add=0, - external_addr=external_addr, - external_port=external_port, - local=local, - protocol=IP_PROTOS.tcp) - server1_n = 0 - server2_n = 0 - server3_n = 0 - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for p in capture: - if p[IP].dst == server1.ip4: - server1_n += 1 - elif p[IP].dst == server2.ip4: - server2_n += 1 - else: - server3_n += 1 - self.assertGreater(server1_n, 0) - self.assertEqual(server2_n, 0) - self.assertGreater(server3_n, 0) - - def test_static_lb_2(self): - """ NAT44 local service load balancing (asymmetrical rule) """ - external_addr = self.nat_addr - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - - locals = [{'addr': server1.ip4, - 'port': local_port, - 'probability': 70, - 'vrf_id': 0}, - {'addr': server2.ip4, - 'port': local_port, - 'probability': 30, - 'vrf_id': 0}] - - self.vapi.nat44_forwarding_enable_disable(enable=1) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags, - external_addr=external_addr, - external_port=external_port, - protocol=IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # from client to service - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - server = None - try: - ip = p[IP] - tcp = p[TCP] - self.assertIn(ip.dst, [server1.ip4, server2.ip4]) - if ip.dst == server1.ip4: - server = server1 - else: - server = server2 - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - p = (Ether(src=server.mac, dst=self.pg0.local_mac) / - IP(src=server.ip4, dst=self.pg1.remote_ip4) / - TCP(sport=local_port, dport=12345)) - 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, self.nat_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client to server (no translation) - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=server1.ip4) / - TCP(sport=12346, dport=local_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - server = None - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, server1.ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client (no translation) - p = (Ether(src=server1.mac, dst=self.pg0.local_mac) / - IP(src=server1.ip4, dst=self.pg1.remote_ip4) / - TCP(sport=local_port, dport=12346)) - 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, server1.ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_lb_affinity(self): - """ NAT44 local service load balancing affinity """ - external_addr = self.nat_addr - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - - locals = [{'addr': server1.ip4, - 'port': local_port, - 'probability': 50, - 'vrf_id': 0}, - {'addr': server2.ip4, - 'port': local_port, - 'probability': 50, - 'vrf_id': 0}] - - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_add_del_lb_static_mapping(is_add=1, - external_addr=external_addr, - external_port=external_port, - protocol=IP_PROTOS.tcp, - affinity=10800, - local_num=len(locals), - locals=locals) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=1025, dport=external_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - backend = capture[0][IP].dst - - sessions = self.vapi.nat44_user_session_dump(backend, 0) - self.assertEqual(len(sessions), 1) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_EXT_HOST_VALID) - self.vapi.nat44_del_session( - address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=(self.config_flags.NAT_IS_INSIDE | - self.config_flags.NAT_IS_EXT_HOST_VALID), - ext_host_address=sessions[0].ext_host_address, - ext_host_port=sessions[0].ext_host_port) - - pkts = [] - for port in range(1030, 1100): - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=port, dport=external_port)) - pkts.append(p) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for p in capture: - self.assertEqual(p[IP].dst, backend) - - def test_unknown_proto(self): - """ NAT44 translate packet with unknown protocol """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # 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.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, self.nat_addr) - self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # out2in - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg2.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.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(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 - server_out_port = 8765 - server_nat_ip = "10.0.0.11" - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # 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() - 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.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, self.nat_addr) - self.assertEqual(packet[IP].dst, server.ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(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.pg2.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.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_output_feature_and_service(self): - """ NAT44 interface output feature and services """ - external_addr = '1.2.3.4' - external_port = 80 - local_port = 8080 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_identity_mapping( - ip_address=self.pg1.remote_ip4, sw_if_index=0xFFFFFFFF, - flags=flags, is_add=1) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.nat44_add_static_mapping(self.pg0.remote_ip4, external_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - - # from client to service - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=external_addr) / - TCP(sport=12345, dport=external_port)) - 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.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - 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=local_port, dport=12345)) - 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, external_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from local network host to external network - 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, ignore_port=True) - 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, ignore_port=True) - - # from external network back to local network host - 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_and_service2(self): - """ NAT44 interface output feature and service host direct access """ - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - - # session initiated from service host - translate - 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, ignore_port=True) - - 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) - - # session initiated from remote host - do not translate - self.tcp_port_in = 60303 - self.udp_port_in = 60304 - self.icmp_id_in = 60305 - pkts = self.create_stream_out(self.pg1, - self.pg0.remote_ip4, - use_inside_ports=True) - 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) - - 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=self.pg0.remote_ip4, - same_port=True) - - def test_output_feature_and_service3(self): - """ NAT44 interface output feature and DST NAT """ - external_addr = '1.2.3.4' - external_port = 80 - local_port = 8080 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.nat44_add_static_mapping(self.pg1.remote_ip4, external_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=external_addr) / - TCP(sport=12345, 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, self.pg0.remote_ip4) - self.assertEqual(tcp.sport, 12345) - self.assertEqual(ip.dst, self.pg1.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) / - TCP(sport=local_port, dport=12345)) - 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, external_addr) - self.assertEqual(tcp.sport, external_port) - self.assertEqual(ip.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, 12345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_next_src_nat(self): - """ On way back forward packet to nat44-in2out node. """ - twice_nat_addr = '10.0.1.3' - external_port = 80 - local_port = 8080 - post_twice_nat_port = 0 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(twice_nat_addr, twice_nat=1) - flags = (self.config_flags.NAT_IS_OUT2IN_ONLY | - self.config_flags.NAT_IS_SELF_TWICE_NAT) - self.nat44_add_static_mapping(self.pg6.remote_ip4, self.pg1.remote_ip4, - local_port, external_port, - proto=IP_PROTOS.tcp, vrf_id=1, - flags=flags) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg6.sw_if_index, - is_add=1) - - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=12345, dport=external_port)) - self.pg6.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, twice_nat_addr) - self.assertNotEqual(tcp.sport, 12345) - post_twice_nat_port = tcp.sport - self.assertEqual(ip.dst, self.pg6.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=twice_nat_addr) / - TCP(sport=local_port, dport=post_twice_nat_port)) - self.pg6.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.pg1.remote_ip4) - self.assertEqual(tcp.sport, external_port) - self.assertEqual(ip.dst, self.pg6.remote_ip4) - self.assertEqual(tcp.dport, 12345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def twice_nat_common(self, self_twice_nat=False, same_pg=False, lb=False, - client_id=None): - twice_nat_addr = '10.0.1.3' - - port_in = 8080 - if lb: - if not same_pg: - port_in1 = port_in - port_in2 = port_in - else: - port_in1 = port_in + 1 - port_in2 = port_in + 2 - - port_out = 80 - eh_port_out = 4567 - - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - if lb and same_pg: - server2 = server1 - if not lb: - server = server1 - - pg0 = self.pg0 - if same_pg: - pg1 = self.pg0 - else: - pg1 = self.pg1 - - eh_translate = ((not self_twice_nat) or (not lb and same_pg) or - client_id == 1) - - self.nat44_add_address(self.nat_addr) - self.nat44_add_address(twice_nat_addr, twice_nat=1) - - flags = 0 - if self_twice_nat: - flags |= self.config_flags.NAT_IS_SELF_TWICE_NAT - else: - flags |= self.config_flags.NAT_IS_TWICE_NAT - - if not lb: - self.nat44_add_static_mapping(pg0.remote_ip4, self.nat_addr, - port_in, port_out, - proto=IP_PROTOS.tcp, - flags=flags) - else: - locals = [{'addr': server1.ip4, - 'port': port_in1, - 'probability': 50, - 'vrf_id': 0}, - {'addr': server2.ip4, - 'port': port_in2, - 'probability': 50, - 'vrf_id': 0}] - out_addr = self.nat_addr - - self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags, - external_addr=out_addr, - external_port=port_out, - protocol=IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=pg1.sw_if_index, - is_add=1) - - if same_pg: - if not lb: - client = server - else: - assert client_id is not None - if client_id == 1: - client = self.pg0.remote_hosts[0] - elif client_id == 2: - client = self.pg0.remote_hosts[1] - else: - client = pg1.remote_hosts[0] - p = (Ether(src=pg1.remote_mac, dst=pg1.local_mac) / - IP(src=client.ip4, dst=self.nat_addr) / - TCP(sport=eh_port_out, dport=port_out)) - pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - if lb: - if ip.dst == server1.ip4: - server = server1 - port_in = port_in1 - else: - server = server2 - port_in = port_in2 - self.assertEqual(ip.dst, server.ip4) - if lb and same_pg: - self.assertIn(tcp.dport, [port_in1, port_in2]) - else: - self.assertEqual(tcp.dport, port_in) - if eh_translate: - self.assertEqual(ip.src, twice_nat_addr) - self.assertNotEqual(tcp.sport, eh_port_out) - else: - self.assertEqual(ip.src, client.ip4) - self.assertEqual(tcp.sport, eh_port_out) - eh_addr_in = ip.src - eh_port_in = tcp.sport - saved_port_in = tcp.dport - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - p = (Ether(src=server.mac, dst=pg0.local_mac) / - IP(src=server.ip4, dst=eh_addr_in) / - TCP(sport=saved_port_in, dport=eh_port_in)) - pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, client.ip4) - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(tcp.dport, eh_port_out) - self.assertEqual(tcp.sport, port_out) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - if eh_translate: - sessions = self.vapi.nat44_user_session_dump(server.ip4, 0) - self.assertEqual(len(sessions), 1) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_EXT_HOST_VALID) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_TWICE_NAT) - self.logger.info(self.vapi.cli("show nat44 sessions detail")) - self.vapi.nat44_del_session( - address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=(self.config_flags.NAT_IS_INSIDE | - self.config_flags.NAT_IS_EXT_HOST_VALID), - ext_host_address=sessions[0].ext_host_nat_address, - ext_host_port=sessions[0].ext_host_nat_port) - sessions = self.vapi.nat44_user_session_dump(server.ip4, 0) - self.assertEqual(len(sessions), 0) - - def test_twice_nat(self): - """ Twice NAT44 """ - self.twice_nat_common() - - def test_self_twice_nat_positive(self): - """ Self Twice NAT44 (positive test) """ - self.twice_nat_common(self_twice_nat=True, same_pg=True) - - def test_self_twice_nat_negative(self): - """ Self Twice NAT44 (negative test) """ - self.twice_nat_common(self_twice_nat=True) - - def test_twice_nat_lb(self): - """ Twice NAT44 local service load balancing """ - self.twice_nat_common(lb=True) - - def test_self_twice_nat_lb_positive(self): - """ Self Twice NAT44 local service load balancing (positive test) """ - self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True, - client_id=1) - - def test_self_twice_nat_lb_negative(self): - """ Self Twice NAT44 local service load balancing (negative test) """ - self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True, - client_id=2) - - def test_twice_nat_interface_addr(self): - """ Acquire twice NAT44 addresses from interface """ - flags = self.config_flags.NAT_IS_TWICE_NAT - self.vapi.nat44_add_del_interface_addr( - is_add=1, - sw_if_index=self.pg3.sw_if_index, - flags=flags) - - # 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.pg3.config_ip4() - adresses = self.vapi.nat44_address_dump() - self.assertEqual(1, len(adresses)) - self.assertEqual(str(adresses[0].ip_address), - self.pg3.local_ip4) - self.assertEqual(adresses[0].flags, flags) - - # remove interface address and check NAT address pool - self.pg3.unconfig_ip4() - adresses = self.vapi.nat44_address_dump() - self.assertEqual(0, len(adresses)) - - def test_tcp_close(self): - """ Close TCP session from inside network - output feature """ - old_timeouts = self.vapi.nat_get_timeouts() - new_transitory = 2 - self.vapi.nat_set_timeouts( - udp=old_timeouts.udp, - tcp_established=old_timeouts.tcp_established, - icmp=old_timeouts.icmp, - tcp_transitory=new_transitory) - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.pg1.local_ip4) - twice_nat_addr = '10.0.1.3' - service_ip = '192.168.16.150' - self.nat44_add_address(twice_nat_addr, twice_nat=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - flags = (self.config_flags.NAT_IS_OUT2IN_ONLY | - self.config_flags.NAT_IS_TWICE_NAT) - self.nat44_add_static_mapping(self.pg0.remote_ip4, - service_ip, - 80, - 80, - proto=IP_PROTOS.tcp, - flags=flags) - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - start_sessnum = len(sessions) - - # SYN packet out->in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=service_ip) / - TCP(sport=33898, dport=80, flags="S")) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - tcp_port = p[TCP].sport - - # SYN + ACK packet in->out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) / - TCP(sport=80, dport=tcp_port, flags="SA")) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # ACK packet out->in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=service_ip) / - TCP(sport=33898, dport=80, flags="A")) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - # FIN packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) / - TCP(sport=80, dport=tcp_port, flags="FA", seq=100, ack=300)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # FIN+ACK packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=service_ip) / - TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - # ACK packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) / - TCP(sport=80, dport=tcp_port, flags="A", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # session now in transitory timeout - # try SYN packet out->in - should be dropped - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=service_ip) / - TCP(sport=33898, dport=80, flags="S")) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - self.sleep(new_transitory, "wait for transitory timeout") - self.pg0.assert_nothing_captured(0) - - # session should still exist - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - self.assertEqual(len(sessions) - start_sessnum, 1) - - # send FIN+ACK packet out -> in - will cause session to be wiped - # but won't create a new session - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=service_ip) / - TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - self.assertEqual(len(sessions) - start_sessnum, 0) - self.pg0.assert_nothing_captured(0) - - def test_tcp_session_close_in(self): - """ Close TCP session from inside network """ - self.tcp_port_out = 10505 - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_TWICE_NAT - self.nat44_add_static_mapping(self.pg0.remote_ip4, - self.nat_addr, - self.tcp_port_in, - self.tcp_port_out, - proto=IP_PROTOS.tcp, - flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - start_sessnum = len(sessions) - - self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, - tcp_transitory=2, icmp=5) - - self.initiate_tcp_session(self.pg0, self.pg1) - - # 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="FA", seq=100, ack=300)) - 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", seq=300, ack=101)) - 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="FA", seq=300, ack=101)) - 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", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - self.assertEqual(len(sessions) - start_sessnum, 1) - - stats = self.statistics.get_counter( - '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') - out2in_drops = stats[0] - stats = self.statistics.get_counter( - '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') - in2out_drops = stats[0] - - # extra FIN packet out -> in - this should be dropped - 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="FA", seq=300, ack=101)) - - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.assert_nothing_captured() - - # extra ACK packet in -> out - this should be dropped - 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", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - - stats = self.statistics.get_counter( - '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') - self.assertEqual(stats[0] - out2in_drops, 1) - stats = self.statistics.get_counter( - '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') - self.assertEqual(stats[0] - in2out_drops, 1) - - self.sleep(3) - # extra ACK packet in -> out - this will cause session to be wiped - 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", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - self.assertEqual(len(sessions) - start_sessnum, 0) - - def test_tcp_session_close_out(self): - """ Close TCP session from outside network """ - self.tcp_port_out = 10505 - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_TWICE_NAT - self.nat44_add_static_mapping(self.pg0.remote_ip4, - self.nat_addr, - self.tcp_port_in, - self.tcp_port_out, - proto=IP_PROTOS.tcp, - flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - start_sessnum = len(sessions) - - self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, - tcp_transitory=2, icmp=5) - - self.initiate_tcp_session(self.pg0, self.pg1) - - # 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="FA", seq=100, ack=300)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - # FIN+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="FA", seq=300, ack=101)) - - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # 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", seq=101, ack=301)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - self.assertEqual(len(sessions) - start_sessnum, 1) - - stats = self.statistics.get_counter( - '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') - out2in_drops = stats[0] - stats = self.statistics.get_counter( - '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') - in2out_drops = stats[0] - - # extra FIN packet out -> in - this should be dropped - 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="FA", seq=300, ack=101)) - - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.assert_nothing_captured() - - # extra ACK packet in -> out - this should be dropped - 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", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - - stats = self.statistics.get_counter( - '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') - self.assertEqual(stats[0] - out2in_drops, 1) - stats = self.statistics.get_counter( - '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') - self.assertEqual(stats[0] - in2out_drops, 1) - - self.sleep(3) - # extra ACK packet in -> out - this will cause session to be wiped - 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", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - self.assertEqual(len(sessions) - start_sessnum, 0) - - def test_tcp_session_close_simultaneous(self): - """ Close TCP session from inside network """ - self.tcp_port_out = 10505 - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_TWICE_NAT - self.nat44_add_static_mapping(self.pg0.remote_ip4, - self.nat_addr, - self.tcp_port_in, - self.tcp_port_out, - proto=IP_PROTOS.tcp, - flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - start_sessnum = len(sessions) - - self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, - tcp_transitory=2, icmp=5) - - self.initiate_tcp_session(self.pg0, self.pg1) - - # 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="FA", seq=100, ack=300)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # 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="FA", seq=300, ack=100)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - # 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", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # 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", seq=301, ack=101)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - self.assertEqual(len(sessions) - start_sessnum, 1) - - stats = self.statistics.get_counter( - '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') - out2in_drops = stats[0] - stats = self.statistics.get_counter( - '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') - in2out_drops = stats[0] - - # extra FIN packet out -> in - this should be dropped - 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="FA", seq=300, ack=101)) - - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.assert_nothing_captured() - - # extra ACK packet in -> out - this should be dropped - 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", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - - stats = self.statistics.get_counter( - '/err/nat44-ed-out2in/drops due to TCP in transitory timeout') - self.assertEqual(stats[0] - out2in_drops, 1) - stats = self.statistics.get_counter( - '/err/nat44-ed-in2out/drops due to TCP in transitory timeout') - self.assertEqual(stats[0] - in2out_drops, 1) - - self.sleep(3) - # extra ACK packet in -> out - this will cause session to be wiped - 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", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) - self.assertEqual(len(sessions) - start_sessnum, 0) - - def test_one_armed_nat44_static(self): - """ One armed NAT44 and 1:1 NAPT asymmetrical rule """ - remote_host = self.pg4.remote_hosts[0] - local_host = self.pg4.remote_hosts[1] - external_port = 80 - local_port = 8080 - eh_port_in = 0 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr, twice_nat=1) - flags = (self.config_flags.NAT_IS_OUT2IN_ONLY | - self.config_flags.NAT_IS_TWICE_NAT) - self.nat44_add_static_mapping(local_host.ip4, self.nat_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg4.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg4.sw_if_index, - flags=flags, is_add=1) - - # from client to service - p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / - IP(src=remote_host.ip4, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - self.pg4.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg4.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, local_host.ip4) - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(tcp.dport, local_port) - self.assertNotEqual(tcp.sport, 12345) - eh_port_in = tcp.sport - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / - IP(src=local_host.ip4, dst=self.nat_addr) / - TCP(sport=local_port, dport=eh_port_in)) - self.pg4.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg4.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(ip.dst, remote_host.ip4) - self.assertEqual(tcp.sport, external_port) - self.assertEqual(tcp.dport, 12345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_static_with_port_out2(self): - """ 1:1 NAPT asymmetrical rule """ - - external_port = 80 - local_port = 8080 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # from client to service - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - 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.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # ICMP error - p = (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) / capture[0][IP]) - 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: - self.assertEqual(p[IP].src, self.nat_addr) - inner = p[IPerror] - self.assertEqual(inner.dst, self.nat_addr) - self.assertEqual(inner[TCPerror].dport, external_port) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - 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=local_port, dport=12345)) - 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, self.nat_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # ICMP error - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - ICMP(type=11) / capture[0][IP]) - 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: - self.assertEqual(p[IP].dst, self.pg0.remote_ip4) - inner = p[IPerror] - self.assertEqual(inner.src, self.pg0.remote_ip4) - self.assertEqual(inner[TCPerror].sport, local_port) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client to server (no translation) - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) / - TCP(sport=12346, dport=local_port)) - 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.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client (no translation) - 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=local_port, dport=12346)) - 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, self.pg0.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_output_feature(self): - """ NAT44 interface output feature (in2out postrouting) """ - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - - # 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, ignore_port=True) - - # 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_stateful_acl(self): - """ NAT44 endpoint-dependent output feature works with stateful ACL """ - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_interface_add_del_output_feature( - sw_if_index=self.pg0.sw_if_index, - flags=self.config_flags.NAT_IS_INSIDE, - is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - sw_if_index=self.pg1.sw_if_index, - flags=self.config_flags.NAT_IS_OUTSIDE, - is_add=1) - - # First ensure that the NAT is working sans ACL - - # send packets out2in, no sessions yet so packets should drop - pkts_out2in = self.create_stream_out(self.pg1) - self.send_and_assert_no_replies(self.pg1, pkts_out2in) - - # send packets into inside intf, ensure received via outside intf - pkts_in2out = self.create_stream_in(self.pg0, self.pg1) - capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1, - len(pkts_in2out)) - self.verify_capture_out(capture, ignore_port=True) - - # send out2in again, with sessions created it should work now - pkts_out2in = self.create_stream_out(self.pg1) - capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0, - len(pkts_out2in)) - self.verify_capture_in(capture, self.pg0) - - # Create an ACL blocking everything - out2in_deny_rule = AclRule(is_permit=0) - out2in_acl = VppAcl(self, rules=[out2in_deny_rule]) - out2in_acl.add_vpp_config() - - # create an ACL to permit/reflect everything - in2out_reflect_rule = AclRule(is_permit=2) - in2out_acl = VppAcl(self, rules=[in2out_reflect_rule]) - in2out_acl.add_vpp_config() - - # apply as input acl on interface and confirm it blocks everything - acl_if = VppAclInterface(self, sw_if_index=self.pg1.sw_if_index, - n_input=1, acls=[out2in_acl]) - acl_if.add_vpp_config() - self.send_and_assert_no_replies(self.pg1, pkts_out2in) - - # apply output acl - acl_if.acls = [out2in_acl, in2out_acl] - acl_if.add_vpp_config() - # send in2out to generate ACL state (NAT state was created earlier) - capture = self.send_and_expect(self.pg0, pkts_in2out, self.pg1, - len(pkts_in2out)) - self.verify_capture_out(capture, ignore_port=True) - - # send out2in again. ACL state exists so it should work now. - # TCP packets with the syn flag set also need the ack flag - for p in pkts_out2in: - if p.haslayer(TCP) and p[TCP].flags & 0x02: - p[TCP].flags |= 0x10 - capture = self.send_and_expect(self.pg1, pkts_out2in, self.pg0, - len(pkts_out2in)) - self.verify_capture_in(capture, self.pg0) - self.logger.info(self.vapi.cli("show trace")) - - def test_multiple_vrf(self): - """ Multiple VRF setup """ - external_addr = '1.2.3.4' - external_port = 80 - local_port = 8080 - port = 0 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1, flags=flags) - self.vapi.nat44_interface_add_del_output_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg5.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg5.sw_if_index, - is_add=1, flags=flags) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg6.sw_if_index, - is_add=1) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.nat44_add_static_mapping(self.pg5.remote_ip4, external_addr, - local_port, external_port, vrf_id=1, - proto=IP_PROTOS.tcp, flags=flags) - self.nat44_add_static_mapping( - self.pg0.remote_ip4, - external_sw_if_index=self.pg0.sw_if_index, - local_port=local_port, - vrf_id=0, - external_port=external_port, - proto=IP_PROTOS.tcp, - flags=flags - ) - - # from client to service (both VRF1) - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=external_addr) / - TCP(sport=12345, dport=external_port)) - self.pg6.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client (both VRF1) - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12345)) - self.pg5.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, external_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # dynamic NAT from VRF1 to VRF0 (output-feature) - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=2345, dport=22)) - self.pg5.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, self.nat_addr) - self.assert_packet_checksums_valid(p) - port = tcp.sport - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=22, dport=port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, 2345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client VRF1 to service VRF0 - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=self.pg0.local_ip4) / - TCP(sport=12346, dport=external_port)) - self.pg6.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.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service VRF0 back to client VRF1 - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12346)) - self.pg0.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.pg0.local_ip4) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client VRF0 to service VRF1 - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=external_addr) / - TCP(sport=12347, dport=external_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service VRF1 back to client VRF0 - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) / - TCP(sport=local_port, dport=12347)) - self.pg5.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, external_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client to server (both VRF1, no translation) - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=self.pg5.remote_ip4) / - TCP(sport=12348, dport=local_port)) - self.pg6.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from server back to client (both VRF1, no translation) - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12348)) - self.pg5.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.pg5.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client VRF1 to server VRF0 (no translation) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12349)) - self.pg0.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.pg0.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from server VRF0 back to client VRF1 (no translation) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12349)) - self.pg0.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.pg0.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client VRF0 to server VRF1 (no translation) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg5.remote_ip4) / - TCP(sport=12344, dport=local_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from server VRF1 back to client VRF0 (no translation) - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) / - TCP(sport=local_port, dport=12344)) - self.pg5.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.pg5.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_session_rst_timeout(self): - """ NAT44 session RST timeouts """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, - tcp_transitory=5, icmp=60) - - self.initiate_tcp_session(self.pg0, self.pg1) - 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="R")) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - sleep(6) - - 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 + 1, dport=self.tcp_external_port + 1, - flags="S")) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - def test_syslog_sess(self): - """ Test syslog session creation and deletion """ - self.vapi.syslog_set_filter( - self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_INFO) - self.vapi.syslog_set_sender(self.pg2.local_ip4, self.pg2.remote_ip4) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - 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=self.tcp_external_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - self.tcp_port_out = capture[0][TCP].sport - capture = self.pg2.get_capture(1) - self.verify_syslog_sess(capture[0][Raw].load) - - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.nat44_add_address(self.nat_addr, is_add=0) - capture = self.pg2.get_capture(1) - self.verify_syslog_sess(capture[0][Raw].load, False) - - def test_ed_users_dump(self): - """ API test - nat44_user_dump """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_forwarding_enable_disable(enable=1) - - real_ip = self.pg0.remote_ip4 - alias_ip = self.nat_addr - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_static_mapping(is_add=1, - local_ip_address=real_ip, - external_ip_address=alias_ip, - external_sw_if_index=0xFFFFFFFF, - flags=flags) - - users = self.vapi.nat44_user_dump() - self.assertEqual(len(users), 0) - try: - # in2out - static mapping match - - 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) - - 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, same_port=True) - - users = self.vapi.nat44_user_dump() - self.assertEqual(len(users), 1) - static_user = users[0] - self.assertEqual(static_user.nstaticsessions, 3) - self.assertEqual(static_user.nsessions, 0) - - # in2out - no static mapping match - - host0 = self.pg0.remote_hosts[0] - self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1] - try: - pkts = self.create_stream_out(self.pg1, - dst_ip=self.pg0.remote_ip4, - use_inside_ports=True) - 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) - - 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=self.pg0.remote_ip4, - same_port=True) - finally: - self.pg0.remote_hosts[0] = host0 - - users = self.vapi.nat44_user_dump() - self.assertEqual(len(users), 2) - if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4: - non_static_user = users[1] - static_user = users[0] - else: - non_static_user = users[0] - static_user = users[1] - self.assertEqual(static_user.nstaticsessions, 3) - self.assertEqual(static_user.nsessions, 0) - self.assertEqual(non_static_user.nstaticsessions, 0) - self.assertEqual(non_static_user.nsessions, 3) - - users = self.vapi.nat44_user_dump() - self.assertEqual(len(users), 2) - if str(users[0].ip_address) == self.pg0.remote_hosts[0].ip4: - non_static_user = users[1] - static_user = users[0] - else: - non_static_user = users[0] - static_user = users[1] - self.assertEqual(static_user.nstaticsessions, 3) - self.assertEqual(static_user.nsessions, 0) - self.assertEqual(non_static_user.nstaticsessions, 0) - self.assertEqual(non_static_user.nsessions, 3) - - finally: - self.vapi.nat44_forwarding_enable_disable(enable=0) - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_static_mapping( - is_add=0, - local_ip_address=real_ip, - external_ip_address=alias_ip, - external_sw_if_index=0xFFFFFFFF, - flags=flags) - - def show_commands_at_teardown(self): - self.logger.info(self.vapi.cli("show errors")) - self.logger.info(self.vapi.cli("show nat44 addresses")) - self.logger.info(self.vapi.cli("show nat44 interfaces")) - self.logger.info(self.vapi.cli("show nat44 static mappings")) - self.logger.info(self.vapi.cli("show nat44 interface address")) - self.logger.info(self.vapi.cli("show nat44 sessions detail")) - self.logger.info(self.vapi.cli("show nat44 hash tables detail")) - self.logger.info(self.vapi.cli("show nat timeouts")) - self.logger.info(self.vapi.cli("debug nat44 fib registration")) - - -class TestNAT44EndpointDependent3(MethodHolder): - """ Endpoint-Dependent mapping and filtering extra test cases """ - - max_translations = 50 - - @classmethod - def setUpClass(cls): - super(TestNAT44EndpointDependent3, cls).setUpClass() - cls.vapi.cli("set log class nat level debug") - - cls.nat_addr = '10.0.0.3' - - cls.create_pg_interfaces(range(2)) - - for i in cls.pg_interfaces: - i.admin_up() - i.config_ip4() - i.resolve_arp() - - def setUp(self): - super(TestNAT44EndpointDependent3, self).setUp() - flags = self.nat44_config_flags.NAT44_IS_ENDPOINT_DEPENDENT - self.vapi.nat44_plugin_enable_disable( - sessions=self.max_translations, - flags=flags, enable=1) - self.vapi.nat_set_timeouts( - udp=1, tcp_established=7440, tcp_transitory=30, icmp=1) - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, is_add=1) - - @classmethod - def tearDownClass(cls): - super(TestNAT44EndpointDependent3, cls).tearDownClass() - - def tearDown(self): - super(TestNAT44EndpointDependent3, self).tearDown() - if not self.vpp_dead: - self.vapi.nat44_plugin_enable_disable(enable=0) - self.vapi.cli("clear logging") - - def init_tcp_session(self, in_if, out_if, sport, ext_dport): - # 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=sport, dport=ext_dport, 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] - 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=ext_dport, dport=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=sport, dport=ext_dport, flags="A")) - in_if.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - out_if.get_capture(1) - - return tcp_port_out - - def test_lru_cleanup(self): - """ LRU cleanup algorithm """ - tcp_port_out = self.init_tcp_session(self.pg0, self.pg1, 2000, 80) - pkts = [] - for i in range(0, self.max_translations - 1): - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) / - UDP(sport=7000+i, dport=80)) - pkts.append(p) - - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(len(pkts)) - self.sleep(1.5, "wait for timeouts") - - pkts = [] - for i in range(0, self.max_translations - 1): - p = (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=8000+i, type='echo-request')) - pkts.append(p) - - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(len(pkts)) - - class TestNAT44Out2InDPO(MethodHolder): - """ NAT44 Test Cases using out2in DPO """ + """ NAT44EI Test Cases using out2in DPO """ @classmethod def setUpClass(cls): @@ -7195,10 +3734,6 @@ class TestNAT44Out2InDPO(MethodHolder): register=False) r1.add_vpp_config() - @classmethod - def tearDownClass(cls): - super(TestNAT44Out2InDPO, cls).tearDownClass() - def setUp(self): super(TestNAT44Out2InDPO, self).setUp() flags = self.nat44_config_flags.NAT44_API_IS_OUT2IN_DPO @@ -7225,7 +3760,7 @@ class TestNAT44Out2InDPO(MethodHolder): @unittest.skip('Temporary disabled') def test_464xlat_ce(self): - """ Test 464XLAT CE with NAT44 """ + """ Test 464XLAT CE with NAT44EI """ nat_config = self.vapi.nat_show_config() self.assertEqual(1, nat_config.out2in_dpo) @@ -7272,7 +3807,7 @@ class TestNAT44Out2InDPO(MethodHolder): @unittest.skip('Temporary disabled') def test_464xlat_ce_no_nat(self): - """ Test 464XLAT CE without NAT44 """ + """ Test 464XLAT CE without NAT44EI """ self.configure_xlat() |