diff options
Diffstat (limited to 'test/test_nat.py')
| -rw-r--r-- | test/test_nat.py | 2041 |
1 files changed, 1105 insertions, 936 deletions
diff --git a/test/test_nat.py b/test/test_nat.py index ad2b9649b7d..8012350b6c6 100644 --- a/test/test_nat.py +++ b/test/test_nat.py @@ -25,6 +25,174 @@ from util import mactobinary class MethodHolder(VppTestCase): """ NAT create capture and verify method holder """ + def clear_nat44(self): + """ + Clear NAT44 configuration. + """ + if hasattr(self, 'pg7') and hasattr(self, 'pg8'): + # I found no elegant way to do this + self.vapi.ip_add_del_route( + dst_address=self.pg7.remote_ip4n, + dst_address_length=32, + next_hop_address=self.pg7.remote_ip4n, + next_hop_sw_if_index=self.pg7.sw_if_index, + is_add=0) + self.vapi.ip_add_del_route( + dst_address=self.pg8.remote_ip4n, + dst_address_length=32, + next_hop_address=self.pg8.remote_ip4n, + next_hop_sw_if_index=self.pg8.sw_if_index, + is_add=0) + + for intf in [self.pg7, self.pg8]: + neighbors = self.vapi.ip_neighbor_dump(intf.sw_if_index) + for n in neighbors: + self.vapi.ip_neighbor_add_del(intf.sw_if_index, + n.mac_address, + n.ip_address, + is_add=0) + + if self.pg7.has_ip4_config: + self.pg7.unconfig_ip4() + + self.vapi.nat44_forwarding_enable_disable(0) + + interfaces = self.vapi.nat44_interface_addr_dump() + for intf in interfaces: + self.vapi.nat44_add_interface_addr(intf.sw_if_index, + twice_nat=intf.twice_nat, + is_add=0) + + self.vapi.nat_ipfix(enable=0, src_port=self.ipfix_src_port, + domain_id=self.ipfix_domain_id) + self.ipfix_src_port = 4739 + self.ipfix_domain_id = 1 + + interfaces = self.vapi.nat44_interface_dump() + for intf in interfaces: + if intf.is_inside > 1: + self.vapi.nat44_interface_add_del_feature(intf.sw_if_index, + 0, + is_add=0) + self.vapi.nat44_interface_add_del_feature(intf.sw_if_index, + intf.is_inside, + is_add=0) + + interfaces = self.vapi.nat44_interface_output_feature_dump() + for intf in interfaces: + self.vapi.nat44_interface_add_del_output_feature(intf.sw_if_index, + intf.is_inside, + is_add=0) + + static_mappings = self.vapi.nat44_static_mapping_dump() + for sm in static_mappings: + self.vapi.nat44_add_del_static_mapping( + sm.local_ip_address, + sm.external_ip_address, + local_port=sm.local_port, + external_port=sm.external_port, + addr_only=sm.addr_only, + vrf_id=sm.vrf_id, + protocol=sm.protocol, + twice_nat=sm.twice_nat, + self_twice_nat=sm.self_twice_nat, + out2in_only=sm.out2in_only, + tag=sm.tag, + external_sw_if_index=sm.external_sw_if_index, + is_add=0) + + lb_static_mappings = self.vapi.nat44_lb_static_mapping_dump() + for lb_sm in lb_static_mappings: + self.vapi.nat44_add_del_lb_static_mapping( + lb_sm.external_addr, + lb_sm.external_port, + lb_sm.protocol, + vrf_id=lb_sm.vrf_id, + twice_nat=lb_sm.twice_nat, + self_twice_nat=lb_sm.self_twice_nat, + out2in_only=lb_sm.out2in_only, + tag=lb_sm.tag, + is_add=0, + local_num=0, + locals=[]) + + identity_mappings = self.vapi.nat44_identity_mapping_dump() + for id_m in identity_mappings: + self.vapi.nat44_add_del_identity_mapping( + addr_only=id_m.addr_only, + ip=id_m.ip_address, + port=id_m.port, + sw_if_index=id_m.sw_if_index, + vrf_id=id_m.vrf_id, + protocol=id_m.protocol, + is_add=0) + + adresses = self.vapi.nat44_address_dump() + for addr in adresses: + self.vapi.nat44_add_del_address_range(addr.ip_address, + addr.ip_address, + twice_nat=addr.twice_nat, + is_add=0) + + self.vapi.nat_set_reass() + self.vapi.nat_set_reass(is_ip6=1) + + def nat44_add_static_mapping(self, local_ip, external_ip='0.0.0.0', + local_port=0, external_port=0, vrf_id=0, + is_add=1, external_sw_if_index=0xFFFFFFFF, + proto=0, twice_nat=0, self_twice_nat=0, + out2in_only=0, tag=""): + """ + Add/delete NAT44 static mapping + + :param local_ip: Local IP address + :param external_ip: External IP address + :param local_port: Local port number (Optional) + :param external_port: External port number (Optional) + :param vrf_id: VRF ID (Default 0) + :param is_add: 1 if add, 0 if delete (Default add) + :param external_sw_if_index: External interface instead of IP address + :param proto: IP protocol (Mandatory if port specified) + :param twice_nat: 1 if translate external host address and port + :param self_twice_nat: 1 if translate external host address and port + whenever external host address equals + local address of internal host + :param out2in_only: if 1 rule is matching only out2in direction + :param tag: Opaque string tag + """ + addr_only = 1 + if local_port and external_port: + addr_only = 0 + l_ip = socket.inet_pton(socket.AF_INET, local_ip) + e_ip = socket.inet_pton(socket.AF_INET, external_ip) + self.vapi.nat44_add_del_static_mapping( + l_ip, + e_ip, + external_sw_if_index, + local_port, + external_port, + addr_only, + vrf_id, + proto, + twice_nat, + self_twice_nat, + out2in_only, + tag, + is_add) + + def nat44_add_address(self, ip, is_add=1, vrf_id=0xFFFFFFFF, twice_nat=0): + """ + Add/delete NAT44 address + + :param ip: IP address + :param is_add: 1 if add, 0 if delete (Default add) + :param twice_nat: twice NAT address for extenal hosts + """ + nat_addr = socket.inet_pton(socket.AF_INET, ip) + self.vapi.nat44_add_del_address_range(nat_addr, nat_addr, is_add, + vrf_id=vrf_id, + twice_nat=twice_nat) + def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64): """ Create packet stream for inside network @@ -895,171 +1063,6 @@ class TestNAT44(MethodHolder): super(TestNAT44, cls).tearDownClass() raise - def clear_nat44(self): - """ - Clear NAT44 configuration. - """ - # I found no elegant way to do this - self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n, - dst_address_length=32, - next_hop_address=self.pg7.remote_ip4n, - next_hop_sw_if_index=self.pg7.sw_if_index, - is_add=0) - self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n, - dst_address_length=32, - next_hop_address=self.pg8.remote_ip4n, - next_hop_sw_if_index=self.pg8.sw_if_index, - is_add=0) - - for intf in [self.pg7, self.pg8]: - neighbors = self.vapi.ip_neighbor_dump(intf.sw_if_index) - for n in neighbors: - self.vapi.ip_neighbor_add_del(intf.sw_if_index, - n.mac_address, - n.ip_address, - is_add=0) - - if self.pg7.has_ip4_config: - self.pg7.unconfig_ip4() - - self.vapi.nat44_forwarding_enable_disable(0) - - interfaces = self.vapi.nat44_interface_addr_dump() - for intf in interfaces: - self.vapi.nat44_add_interface_addr(intf.sw_if_index, - twice_nat=intf.twice_nat, - is_add=0) - - self.vapi.nat_ipfix(enable=0, src_port=self.ipfix_src_port, - domain_id=self.ipfix_domain_id) - self.ipfix_src_port = 4739 - self.ipfix_domain_id = 1 - - interfaces = self.vapi.nat44_interface_dump() - for intf in interfaces: - if intf.is_inside > 1: - self.vapi.nat44_interface_add_del_feature(intf.sw_if_index, - 0, - is_add=0) - self.vapi.nat44_interface_add_del_feature(intf.sw_if_index, - intf.is_inside, - is_add=0) - - interfaces = self.vapi.nat44_interface_output_feature_dump() - for intf in interfaces: - self.vapi.nat44_interface_add_del_output_feature(intf.sw_if_index, - intf.is_inside, - is_add=0) - - static_mappings = self.vapi.nat44_static_mapping_dump() - for sm in static_mappings: - self.vapi.nat44_add_del_static_mapping( - sm.local_ip_address, - sm.external_ip_address, - local_port=sm.local_port, - external_port=sm.external_port, - addr_only=sm.addr_only, - vrf_id=sm.vrf_id, - protocol=sm.protocol, - twice_nat=sm.twice_nat, - self_twice_nat=sm.self_twice_nat, - out2in_only=sm.out2in_only, - tag=sm.tag, - external_sw_if_index=sm.external_sw_if_index, - is_add=0) - - lb_static_mappings = self.vapi.nat44_lb_static_mapping_dump() - for lb_sm in lb_static_mappings: - self.vapi.nat44_add_del_lb_static_mapping( - lb_sm.external_addr, - lb_sm.external_port, - lb_sm.protocol, - vrf_id=lb_sm.vrf_id, - twice_nat=lb_sm.twice_nat, - self_twice_nat=lb_sm.self_twice_nat, - out2in_only=lb_sm.out2in_only, - tag=lb_sm.tag, - is_add=0, - local_num=0, - locals=[]) - - identity_mappings = self.vapi.nat44_identity_mapping_dump() - for id_m in identity_mappings: - self.vapi.nat44_add_del_identity_mapping( - addr_only=id_m.addr_only, - ip=id_m.ip_address, - port=id_m.port, - sw_if_index=id_m.sw_if_index, - vrf_id=id_m.vrf_id, - protocol=id_m.protocol, - is_add=0) - - adresses = self.vapi.nat44_address_dump() - for addr in adresses: - self.vapi.nat44_add_del_address_range(addr.ip_address, - addr.ip_address, - twice_nat=addr.twice_nat, - is_add=0) - - self.vapi.nat_set_reass() - self.vapi.nat_set_reass(is_ip6=1) - - def nat44_add_static_mapping(self, local_ip, external_ip='0.0.0.0', - local_port=0, external_port=0, vrf_id=0, - is_add=1, external_sw_if_index=0xFFFFFFFF, - proto=0, twice_nat=0, self_twice_nat=0, - out2in_only=0, tag=""): - """ - Add/delete NAT44 static mapping - - :param local_ip: Local IP address - :param external_ip: External IP address - :param local_port: Local port number (Optional) - :param external_port: External port number (Optional) - :param vrf_id: VRF ID (Default 0) - :param is_add: 1 if add, 0 if delete (Default add) - :param external_sw_if_index: External interface instead of IP address - :param proto: IP protocol (Mandatory if port specified) - :param twice_nat: 1 if translate external host address and port - :param self_twice_nat: 1 if translate external host address and port - whenever external host address equals - local address of internal host - :param out2in_only: if 1 rule is matching only out2in direction - :param tag: Opaque string tag - """ - addr_only = 1 - if local_port and external_port: - addr_only = 0 - l_ip = socket.inet_pton(socket.AF_INET, local_ip) - e_ip = socket.inet_pton(socket.AF_INET, external_ip) - self.vapi.nat44_add_del_static_mapping( - l_ip, - e_ip, - external_sw_if_index, - local_port, - external_port, - addr_only, - vrf_id, - proto, - twice_nat, - self_twice_nat, - out2in_only, - tag, - is_add) - - def nat44_add_address(self, ip, is_add=1, vrf_id=0xFFFFFFFF, twice_nat=0): - """ - Add/delete NAT44 address - - :param ip: IP address - :param is_add: 1 if add, 0 if delete (Default add) - :param twice_nat: twice NAT address for extenal hosts - """ - nat_addr = socket.inet_pton(socket.AF_INET, ip) - self.vapi.nat44_add_del_address_range(nat_addr, nat_addr, is_add, - vrf_id=vrf_id, - twice_nat=twice_nat) - def test_dynamic(self): """ NAT44 dynamic translation test """ @@ -1249,7 +1252,7 @@ class TestNAT44(MethodHolder): self.verify_capture_out(capture, same_port=True, packet_num=1) self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp) - def test_forwarding(self): + def _test_forwarding(self): """ NAT44 forwarding test """ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) @@ -1464,132 +1467,6 @@ class TestNAT44(MethodHolder): capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture) - def test_static_with_port_out2(self): - """ 1:1 NAPT symmetrical rule """ - - external_port = 80 - local_port = 8080 - - self.vapi.nat44_forwarding_enable_disable(1) - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, out2in_only=1) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, - is_inside=0) - - # 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_vrf_aware(self): """ 1:1 NAT VRF awareness """ @@ -1683,241 +1560,6 @@ class TestNAT44(MethodHolder): self.logger.error(ppp("Unexpected or invalid packet:", p)) raise - def test_static_lb(self): - """ NAT44 local service load balancing """ - external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr) - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - - locals = [{'addr': server1.ip4n, - 'port': local_port, - 'probability': 70}, - {'addr': server2.ip4n, - 'port': local_port, - 'probability': 30}] - - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_add_del_lb_static_mapping(external_addr_n, - external_port, - IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, - is_inside=0) - - # 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.ip4n, 0) - self.assertEqual(len(sessions), 1) - self.assertTrue(sessions[0].ext_host_valid) - self.vapi.nat44_del_session( - sessions[0].inside_ip_address, - sessions[0].inside_port, - sessions[0].protocol, - ext_host_address=sessions[0].ext_host_address, - ext_host_port=sessions[0].ext_host_port) - sessions = self.vapi.nat44_user_session_dump(server.ip4n, 0) - self.assertEqual(len(sessions), 0) - - @unittest.skipUnless(running_extended_tests(), "part of extended tests") - def test_static_lb_multi_clients(self): - """ NAT44 local service load balancing - multiple clients""" - - external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr) - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - - locals = [{'addr': server1.ip4n, - 'port': local_port, - 'probability': 90}, - {'addr': server2.ip4n, - 'port': local_port, - 'probability': 10}] - - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_add_del_lb_static_mapping(external_addr_n, - external_port, - IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, - is_inside=0) - - 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.assertTrue(server1_n > server2_n) - - def test_static_lb_2(self): - """ NAT44 local service load balancing (asymmetrical rule) """ - external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr) - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - - locals = [{'addr': server1.ip4n, - 'port': local_port, - 'probability': 70}, - {'addr': server2.ip4n, - 'port': local_port, - 'probability': 30}] - - self.vapi.nat44_forwarding_enable_disable(1) - self.vapi.nat44_add_del_lb_static_mapping(external_addr_n, - external_port, - IP_PROTOS.tcp, - out2in_only=1, - local_num=len(locals), - locals=locals) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, - is_inside=0) - - # 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_multiple_inside_interfaces(self): """ NAT44 multiple non-overlapping address space inside interfaces """ @@ -3042,125 +2684,6 @@ class TestNAT44(MethodHolder): self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise - def test_unknown_proto(self): - """ NAT44 translate packet with unknown protocol """ - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, - is_inside=0) - - # in2out - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=20)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, self.nat_addr) - self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) - self.assertTrue(packet.haslayer(GRE)) - self.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.pg3.remote_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, self.pg1.remote_ip4) - self.assertEqual(packet[IP].dst, self.pg0.remote_ip4) - self.assertTrue(packet.haslayer(GRE)) - self.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) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, - is_inside=0) - - # add static mapping for server - self.nat44_add_static_mapping(server.ip4, server_nat_ip) - - # host to server - p = (Ether(src=host.mac, dst=self.pg0.local_mac) / - IP(src=host.ip4, dst=server_nat_ip) / - TCP(sport=host_in_port, dport=server_out_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - p = (Ether(dst=self.pg0.local_mac, src=host.mac) / - IP(src=host.ip4, dst=server_nat_ip) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, self.nat_addr) - self.assertEqual(packet[IP].dst, server.ip4) - self.assertTrue(packet.haslayer(GRE)) - self.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.pg3.remote_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, server_nat_ip) - self.assertEqual(packet[IP].dst, host.ip4) - self.assertTrue(packet.haslayer(GRE)) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - def test_output_feature(self): """ NAT44 interface output feature (in2out postrouting) """ self.nat44_add_address(self.nat_addr) @@ -3310,181 +2833,6 @@ class TestNAT44(MethodHolder): self.logger.error(ppp("Unexpected or invalid packet:", p)) 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(1) - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_add_del_identity_mapping(ip=self.pg1.remote_ip4n) - self.nat44_add_static_mapping(self.pg0.remote_ip4, external_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, out2in_only=1) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index, - is_inside=0) - self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index, - is_inside=0) - - # 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) - 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) - - # 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(1) - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index, - is_inside=0) - - # session initiaded 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) - - 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 initiaded from remote host - do not translate - 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(1) - self.nat44_add_address(self.nat_addr) - self.nat44_add_static_mapping(self.pg1.remote_ip4, external_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, out2in_only=1) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index, - is_inside=0) - self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index, - is_inside=0) - - 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_one_armed_nat44(self): """ One armed NAT44 """ remote_host = self.pg9.remote_hosts[0] @@ -3539,67 +2887,6 @@ class TestNAT44(MethodHolder): self.logger.error(ppp("Unexpected or invalid packet:", p)) raise - def test_one_armed_nat44_static(self): - """ One armed NAT44 and 1:1 NAPT symmetrical rule """ - remote_host = self.pg9.remote_hosts[0] - local_host = self.pg9.remote_hosts[1] - external_port = 80 - local_port = 8080 - eh_port_in = 0 - - self.vapi.nat44_forwarding_enable_disable(1) - self.nat44_add_address(self.nat_addr, twice_nat=1) - self.nat44_add_static_mapping(local_host.ip4, self.nat_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, out2in_only=1, - twice_nat=1) - self.vapi.nat44_interface_add_del_feature(self.pg9.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg9.sw_if_index, - is_inside=0) - - # from client to service - p = (Ether(src=self.pg9.remote_mac, dst=self.pg9.local_mac) / - IP(src=remote_host.ip4, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - self.pg9.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg9.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.pg9.remote_mac, dst=self.pg9.local_mac) / - IP(src=local_host.ip4, dst=self.nat_addr) / - TCP(sport=local_port, dport=eh_port_in)) - self.pg9.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg9.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_del_session(self): """ Delete NAT44 session """ self.nat44_add_address(self.nat_addr) @@ -3808,6 +3095,750 @@ class TestNAT44(MethodHolder): self.logger.error(ppp("Unexpected or invalid packet:", p)) raise + def test_ipfix_max_frags(self): + """ IPFIX logging maximum fragments pending reassembly exceeded """ + self.nat44_add_address(self.nat_addr) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, + is_inside=0) + self.vapi.nat_set_reass(max_frag=0) + self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n, + src_address=self.pg3.local_ip4n, + path_mtu=512, + template_interval=10) + self.vapi.nat_ipfix(domain_id=self.ipfix_domain_id, + src_port=self.ipfix_src_port) + + data = "A" * 4 + "B" * 16 + "C" * 3 + self.tcp_port_in = random.randint(1025, 65535) + pkts = self.create_stream_frag(self.pg0, + self.pg1.remote_ip4, + self.tcp_port_in, + 20, + data) + self.pg0.add_stream(pkts[-1]) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + sleep(1) + self.vapi.cli("ipfix flush") # FIXME this should be an API call + capture = self.pg3.get_capture(9) + ipfix = IPFIXDecoder() + # first load template + for p in capture: + self.assertTrue(p.haslayer(IPFIX)) + self.assertEqual(p[IP].src, self.pg3.local_ip4) + self.assertEqual(p[IP].dst, self.pg3.remote_ip4) + self.assertEqual(p[UDP].sport, self.ipfix_src_port) + self.assertEqual(p[UDP].dport, 4739) + self.assertEqual(p[IPFIX].observationDomainID, + self.ipfix_domain_id) + if p.haslayer(Template): + ipfix.add_template(p.getlayer(Template)) + # verify events in data set + for p in capture: + if p.haslayer(Data): + data = ipfix.decode_data_set(p.getlayer(Set)) + self.verify_ipfix_max_fragments_ip4(data, 0, + self.pg0.remote_ip4n) + + def tearDown(self): + super(TestNAT44, self).tearDown() + if not self.vpp_dead: + 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 nat virtual-reassembly")) + self.logger.info(self.vapi.cli("show nat44 hash tables detail")) + self.vapi.cli("nat addr-port-assignment-alg default") + self.clear_nat44() + self.vapi.cli("clear logging") + + +class TestNAT44EndpointDependent(MethodHolder): + """ Endpoint-Dependent mapping and filtering test cases """ + + @classmethod + def setUpConstants(cls): + super(TestNAT44EndpointDependent, cls).setUpConstants() + cls.vpp_cmdline.extend(["nat", "{", "endpoint-dependent", "}"]) + + @classmethod + def setUpClass(cls): + super(TestNAT44EndpointDependent, cls).setUpClass() + cls.vapi.cli("set log class nat level debug") + try: + cls.tcp_port_in = 6303 + cls.tcp_port_out = 6303 + cls.udp_port_in = 6304 + cls.udp_port_out = 6304 + cls.icmp_id_in = 6305 + cls.icmp_id_out = 6305 + cls.nat_addr = '10.0.0.3' + cls.nat_addr_n = socket.inet_pton(socket.AF_INET, cls.nat_addr) + cls.ipfix_src_port = 4739 + cls.ipfix_domain_id = 1 + cls.tcp_external_port = 80 + + cls.create_pg_interfaces(range(5)) + 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() + ip_addr_n = socket.inet_pton(socket.AF_INET, "10.0.0.1") + cls.vapi.sw_interface_add_del_address(cls.pg4.sw_if_index, + ip_addr_n, + 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() + + except Exception: + super(TestNAT44EndpointDependent, cls).tearDownClass() + raise + + def test_dynamic(self): + """ NAT44 dynamic translation test """ + + self.nat44_add_address(self.nat_addr) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, + is_inside=0) + + # in2out + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture) + + # out2in + pkts = self.create_stream_out(self.pg1) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg0) + + def test_forwarding(self): + """ NAT44 forwarding test """ + + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, + is_inside=0) + self.vapi.nat44_forwarding_enable_disable(1) + + real_ip = self.pg0.remote_ip4n + alias_ip = self.nat_addr_n + self.vapi.nat44_add_del_static_mapping(local_ip=real_ip, + external_ip=alias_ip) + + 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.ip4n, 0) + self.assertEqual(len(sessions), 3) + self.assertTrue(sessions[0].ext_host_valid) + self.vapi.nat44_del_session( + sessions[0].inside_ip_address, + sessions[0].inside_port, + sessions[0].protocol, + ext_host_address=sessions[0].ext_host_address, + ext_host_port=sessions[0].ext_host_port) + sessions = self.vapi.nat44_user_session_dump(user.ip4n, 0) + self.assertEqual(len(sessions), 2) + + finally: + self.vapi.nat44_forwarding_enable_disable(0) + self.vapi.nat44_add_del_static_mapping(local_ip=real_ip, + external_ip=alias_ip, + is_add=0) + + def test_static_lb(self): + """ NAT44 local service load balancing """ + external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr) + external_port = 80 + local_port = 8080 + server1 = self.pg0.remote_hosts[0] + server2 = self.pg0.remote_hosts[1] + + locals = [{'addr': server1.ip4n, + 'port': local_port, + 'probability': 70}, + {'addr': server2.ip4n, + 'port': local_port, + 'probability': 30}] + + self.nat44_add_address(self.nat_addr) + self.vapi.nat44_add_del_lb_static_mapping(external_addr_n, + external_port, + IP_PROTOS.tcp, + local_num=len(locals), + locals=locals) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, + is_inside=0) + + # 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.ip4n, 0) + self.assertEqual(len(sessions), 1) + self.assertTrue(sessions[0].ext_host_valid) + self.vapi.nat44_del_session( + sessions[0].inside_ip_address, + sessions[0].inside_port, + sessions[0].protocol, + ext_host_address=sessions[0].ext_host_address, + ext_host_port=sessions[0].ext_host_port) + sessions = self.vapi.nat44_user_session_dump(server.ip4n, 0) + self.assertEqual(len(sessions), 0) + + @unittest.skipUnless(running_extended_tests(), "part of extended tests") + def test_static_lb_multi_clients(self): + """ NAT44 local service load balancing - multiple clients""" + + external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr) + external_port = 80 + local_port = 8080 + server1 = self.pg0.remote_hosts[0] + server2 = self.pg0.remote_hosts[1] + + locals = [{'addr': server1.ip4n, + 'port': local_port, + 'probability': 90}, + {'addr': server2.ip4n, + 'port': local_port, + 'probability': 10}] + + self.nat44_add_address(self.nat_addr) + self.vapi.nat44_add_del_lb_static_mapping(external_addr_n, + external_port, + IP_PROTOS.tcp, + local_num=len(locals), + locals=locals) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, + is_inside=0) + + 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.assertTrue(server1_n > server2_n) + + def test_static_lb_2(self): + """ NAT44 local service load balancing (asymmetrical rule) """ + external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr) + external_port = 80 + local_port = 8080 + server1 = self.pg0.remote_hosts[0] + server2 = self.pg0.remote_hosts[1] + + locals = [{'addr': server1.ip4n, + 'port': local_port, + 'probability': 70}, + {'addr': server2.ip4n, + 'port': local_port, + 'probability': 30}] + + self.vapi.nat44_forwarding_enable_disable(1) + self.vapi.nat44_add_del_lb_static_mapping(external_addr_n, + external_port, + IP_PROTOS.tcp, + out2in_only=1, + local_num=len(locals), + locals=locals) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, + is_inside=0) + + # 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_unknown_proto(self): + """ NAT44 translate packet with unknown protocol """ + self.nat44_add_address(self.nat_addr) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, + is_inside=0) + + # in2out + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / + TCP(sport=self.tcp_port_in, dport=20)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + p = self.pg1.get_capture(1) + + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / + GRE() / + IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) / + TCP(sport=1234, dport=1234)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + p = self.pg1.get_capture(1) + packet = p[0] + try: + self.assertEqual(packet[IP].src, self.nat_addr) + self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) + self.assertTrue(packet.haslayer(GRE)) + self.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.assertTrue(packet.haslayer(GRE)) + 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) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, + is_inside=0) + + # add static mapping for server + self.nat44_add_static_mapping(server.ip4, server_nat_ip) + + # host to server + p = (Ether(src=host.mac, dst=self.pg0.local_mac) / + IP(src=host.ip4, dst=server_nat_ip) / + TCP(sport=host_in_port, dport=server_out_port)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + 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.assertTrue(packet.haslayer(GRE)) + 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.assertTrue(packet.haslayer(GRE)) + 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(1) + self.nat44_add_address(self.nat_addr) + self.vapi.nat44_add_del_identity_mapping(ip=self.pg1.remote_ip4n) + self.nat44_add_static_mapping(self.pg0.remote_ip4, external_addr, + local_port, external_port, + proto=IP_PROTOS.tcp, out2in_only=1) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index, + is_inside=0) + self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index, + is_inside=0) + + # 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) + 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) + + # 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(1) + self.nat44_add_address(self.nat_addr) + self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index, + is_inside=0) + + # session initiaded 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) + + 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 initiaded 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(1) + self.nat44_add_address(self.nat_addr) + self.nat44_add_static_mapping(self.pg1.remote_ip4, external_addr, + local_port, external_port, + proto=IP_PROTOS.tcp, out2in_only=1) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index, + is_inside=0) + self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index, + is_inside=0) + + 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 twice_nat_common(self, self_twice_nat=False, same_pg=False, lb=False, client_id=None): twice_nat_addr = '10.0.1.3' @@ -3979,71 +4010,24 @@ class TestNAT44(MethodHolder): def test_twice_nat_interface_addr(self): """ Acquire twice NAT44 addresses from interface """ - self.vapi.nat44_add_interface_addr(self.pg7.sw_if_index, twice_nat=1) + self.vapi.nat44_add_interface_addr(self.pg3.sw_if_index, twice_nat=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.pg7.config_ip4() + self.pg3.config_ip4() adresses = self.vapi.nat44_address_dump() self.assertEqual(1, len(adresses)) - self.assertEqual(adresses[0].ip_address[0:4], self.pg7.local_ip4n) + self.assertEqual(adresses[0].ip_address[0:4], self.pg3.local_ip4n) self.assertEqual(adresses[0].twice_nat, 1) # remove interface address and check NAT address pool - self.pg7.unconfig_ip4() + self.pg3.unconfig_ip4() adresses = self.vapi.nat44_address_dump() self.assertEqual(0, len(adresses)) - def test_ipfix_max_frags(self): - """ IPFIX logging maximum fragments pending reassembly exceeded """ - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, - is_inside=0) - self.vapi.nat_set_reass(max_frag=0) - self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n, - src_address=self.pg3.local_ip4n, - path_mtu=512, - template_interval=10) - self.vapi.nat_ipfix(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port) - - data = "A" * 4 + "B" * 16 + "C" * 3 - self.tcp_port_in = random.randint(1025, 65535) - pkts = self.create_stream_frag(self.pg0, - self.pg1.remote_ip4, - self.tcp_port_in, - 20, - data) - self.pg0.add_stream(pkts[-1]) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sleep(1) - self.vapi.cli("ipfix flush") # FIXME this should be an API call - capture = self.pg3.get_capture(9) - ipfix = IPFIXDecoder() - # first load template - for p in capture: - self.assertTrue(p.haslayer(IPFIX)) - self.assertEqual(p[IP].src, self.pg3.local_ip4) - self.assertEqual(p[IP].dst, self.pg3.remote_ip4) - self.assertEqual(p[UDP].sport, self.ipfix_src_port) - self.assertEqual(p[UDP].dport, 4739) - self.assertEqual(p[IPFIX].observationDomainID, - self.ipfix_domain_id) - if p.haslayer(Template): - ipfix.add_template(p.getlayer(Template)) - # verify events in data set - for p in capture: - if p.haslayer(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_max_fragments_ip4(data, 0, - self.pg0.remote_ip4n) - def test_tcp_session_close_in(self): """ Close TCP session from inside network """ self.tcp_port_out = 10505 @@ -4225,17 +4209,202 @@ class TestNAT44(MethodHolder): 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(1) + self.nat44_add_address(self.nat_addr, twice_nat=1) + self.nat44_add_static_mapping(local_host.ip4, self.nat_addr, + local_port, external_port, + proto=IP_PROTOS.tcp, out2in_only=1, + twice_nat=1) + self.vapi.nat44_interface_add_del_feature(self.pg4.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg4.sw_if_index, + is_inside=0) + + # 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(1) + self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + local_port, external_port, + proto=IP_PROTOS.tcp, out2in_only=1) + self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index, + is_inside=0) + + # 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 tearDown(self): - super(TestNAT44, self).tearDown() + super(TestNAT44EndpointDependent, self).tearDown() if not self.vpp_dead: 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 nat virtual-reassembly")) self.logger.info(self.vapi.cli("show nat44 hash tables detail")) - self.vapi.cli("nat addr-port-assignment-alg default") self.clear_nat44() self.vapi.cli("clear logging") |