diff options
| author |   Filip Varga <fivarga@cisco.com> | 2020-11-09 12:24:03 +0100 |
|---|---|---|
| committer |   Ole Tr�an <otroan@employees.org> | 2020-11-13 15:45:23 +0000 |
| commit | 25fd8ad03e6ef321604437fe8fc56ab2b3858cd7 (patch) | |
| tree | f362bfad633f80ebad6c811dbf7c98ef5a701ddb /src/plugins/nat/test/test_nat44.py | |
| parent | e655240550f0670279b0ca40942887715b8f514e (diff) | |
nat: cleanup & reorganization
Fixed compatibility issue between
nat ei and nat ed modes. Moved nat
syslogging to nat librarry. Deprecating
apis that will be integrated in upcoming
candidate configuration patch.
Type: refactor
Change-Id: I334b1b05b81b74667c5c76a05f768442e0dcf7e8
Signed-off-by: Filip Varga <fivarga@cisco.com>
Diffstat (limited to 'src/plugins/nat/test/test_nat44.py')
| -rw-r--r-- | src/plugins/nat/test/test_nat44.py | 7276 |
1 files changed, 7276 insertions, 0 deletions
diff --git a/src/plugins/nat/test/test_nat44.py b/src/plugins/nat/test/test_nat44.py new file mode 100644 index 00000000000..d635abf9825 --- /dev/null +++ b/src/plugins/nat/test/test_nat44.py @@ -0,0 +1,7276 @@ +#!/usr/bin/env python3 + +import ipaddress +import random +import socket +import struct +import unittest +from io import BytesIO +from time import sleep + +import scapy.compat +from framework import VppTestCase, VppTestRunner, running_extended_tests +from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder +from scapy.all import bind_layers, Packet, ByteEnumField, ShortField, \ + IPField, IntField, LongField, XByteField, FlagsField, FieldLenField, \ + PacketListField +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.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 vpp_ip_route import VppIpRoute, VppRoutePath +from vpp_neighbor import VppNeighbor +from vpp_papi import VppEnum + + +# NAT HA protocol event data +class Event(Packet): + name = "Event" + fields_desc = [ByteEnumField("event_type", None, + {1: "add", 2: "del", 3: "refresh"}), + ByteEnumField("protocol", None, + {0: "other", 1: "udp", 2: "tcp", 3: "icmp"}), + ShortField("flags", 0), + IPField("in_addr", None), + IPField("out_addr", None), + ShortField("in_port", None), + ShortField("out_port", None), + IPField("eh_addr", None), + IPField("ehn_addr", None), + ShortField("eh_port", None), + ShortField("ehn_port", None), + IntField("fib_index", None), + IntField("total_pkts", 0), + LongField("total_bytes", 0)] + + def extract_padding(self, s): + return "", s + + +# NAT HA protocol header +class HANATStateSync(Packet): + name = "HA NAT state sync" + fields_desc = [XByteField("version", 1), + FlagsField("flags", 0, 8, ['ACK']), + FieldLenField("count", None, count_of="events"), + IntField("sequence_number", 1), + IntField("thread_index", 0), + PacketListField("events", [], Event, + count_from=lambda pkt: pkt.count)] + + +class MethodHolder(VppTestCase): + """ NAT create capture and verify method holder """ + + @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 + + 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, tag="", flags=0): + """ + Add/delete NAT44 static mapping + + :param local_ip: Local IP address + :param external_ip: External IP address + :param local_port: Local port number (Optional) + :param external_port: External port number (Optional) + :param vrf_id: VRF ID (Default 0) + :param is_add: 1 if add, 0 if delete (Default add) + :param external_sw_if_index: External interface instead of IP address + :param proto: IP protocol (Mandatory if port specified) + :param tag: Opaque string tag + :param flags: NAT configuration flags + """ + + 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) + + 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 external hosts + """ + flags = self.config_flags.NAT_IS_TWICE_NAT if twice_nat else 0 + self.vapi.nat44_add_del_address_range(first_ip_address=ip, + last_ip_address=ip, + vrf_id=vrf_id, + is_add=is_add, + flags=flags) + + def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64): + """ + Create packet stream for inside network + + :param in_if: Inside interface + :param out_if: Outside interface + :param dst_ip: Destination address + :param ttl: TTL of generated packets + """ + 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 compose_ip6(self, ip4, pref, plen): + """ + Compose IPv4-embedded IPv6 addresses + + :param ip4: IPv4 address + :param pref: IPv6 prefix + :param plen: IPv6 prefix length + :returns: IPv4-embedded IPv6 addresses + """ + pref_n = list(socket.inet_pton(socket.AF_INET6, pref)) + ip4_n = list(socket.inet_pton(socket.AF_INET, ip4)) + if plen == 32: + pref_n[4] = ip4_n[0] + pref_n[5] = ip4_n[1] + pref_n[6] = ip4_n[2] + pref_n[7] = ip4_n[3] + elif plen == 40: + pref_n[5] = ip4_n[0] + pref_n[6] = ip4_n[1] + pref_n[7] = ip4_n[2] + pref_n[9] = ip4_n[3] + elif plen == 48: + pref_n[6] = ip4_n[0] + pref_n[7] = ip4_n[1] + pref_n[9] = ip4_n[2] + pref_n[10] = ip4_n[3] + elif plen == 56: + pref_n[7] = ip4_n[0] + pref_n[9] = ip4_n[1] + pref_n[10] = ip4_n[2] + pref_n[11] = ip4_n[3] + elif plen == 64: + pref_n[9] = ip4_n[0] + pref_n[10] = ip4_n[1] + pref_n[11] = ip4_n[2] + pref_n[12] = ip4_n[3] + elif plen == 96: + pref_n[12] = ip4_n[0] + pref_n[13] = ip4_n[1] + pref_n[14] = ip4_n[2] + pref_n[15] = ip4_n[3] + 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): + """ + Create packet stream for outside network + + :param out_if: Outside interface + :param dst_ip: Destination IP address (Default use global NAT address) + :param ttl: TTL of generated packets + :param use_inside_ports: Use inside NAT ports as destination ports + instead of outside ports + """ + 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_stream_out_ip6(self, out_if, src_ip, dst_ip, hl=64): + """ + Create packet stream for outside network + + :param out_if: Outside interface + :param dst_ip: Destination IP address (Default use global NAT address) + :param hl: HL of generated packets + """ + pkts = [] + # TCP + p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / + IPv6(src=src_ip, dst=dst_ip, hlim=hl) / + TCP(dport=self.tcp_port_out, sport=20)) + pkts.append(p) + + # UDP + p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / + IPv6(src=src_ip, dst=dst_ip, hlim=hl) / + UDP(dport=self.udp_port_out, sport=20)) + pkts.append(p) + + # ICMP + p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / + IPv6(src=src_ip, dst=dst_ip, hlim=hl) / + ICMPv6EchoReply(id=self.icmp_id_out)) + pkts.append(p) + + return pkts + + def verify_capture_out(self, capture, nat_ip=None, same_port=False, + dst_ip=None, is_ip6=False, ignore_port=False): + """ + Verify captured packets on outside network + + :param capture: Captured packets + :param nat_ip: Translated IP address (Default use global NAT address) + :param same_port: Source port number is not translated (Default False) + :param dst_ip: Destination IP address (Default do not verify) + :param is_ip6: If L3 protocol is IPv6 (Default False) + """ + if is_ip6: + IP46 = IPv6 + ICMP46 = ICMPv6EchoRequest + else: + IP46 = IP + ICMP46 = ICMP + if nat_ip is None: + nat_ip = self.nat_addr + for packet in capture: + try: + if not is_ip6: + self.assert_packet_checksums_valid(packet) + self.assertEqual(packet[IP46].src, nat_ip) + if dst_ip is not None: + self.assertEqual(packet[IP46].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[ICMP46].id, self.icmp_id_in) + else: + self.assertNotEqual( + packet[ICMP46].id, self.icmp_id_in) + self.icmp_id_out = packet[ICMP46].id + self.assert_packet_checksums_valid(packet) + except: + self.logger.error(ppp("Unexpected or invalid packet " + "(outside network):", packet)) + raise + + def verify_capture_out_ip6(self, capture, nat_ip, same_port=False, + dst_ip=None): + """ + Verify captured packets on outside network + + :param capture: Captured packets + :param nat_ip: Translated IP address + :param same_port: Source port number is not translated (Default False) + :param dst_ip: Destination IP address (Default do not verify) + """ + return self.verify_capture_out(capture, nat_ip, same_port, dst_ip, + True) + + def verify_capture_in(self, capture, in_if): + """ + Verify captured packets on inside network + + :param capture: Captured packets + :param in_if: Inside interface + """ + 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 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 + + :param capture: Captured packets + :param ingress_if: Ingress interface + :param egress_if: Egress interface + """ + for packet in capture: + try: + self.assertEqual(packet[IP].src, ingress_if.remote_ip4) + self.assertEqual(packet[IP].dst, egress_if.remote_ip4) + if packet.haslayer(TCP): + self.assertEqual(packet[TCP].sport, self.tcp_port_in) + elif packet.haslayer(UDP): + self.assertEqual(packet[UDP].sport, self.udp_port_in) + else: + self.assertEqual(packet[ICMP].id, self.icmp_id_in) + except: + self.logger.error(ppp("Unexpected or invalid packet " + "(inside network):", packet)) + raise + + def verify_capture_out_with_icmp_errors(self, capture, src_ip=None, + icmp_type=11): + """ + Verify captured packets with ICMP errors on outside network + + :param capture: Captured packets + :param src_ip: Translated IP address or IP address of VPP + (Default use global NAT address) + :param icmp_type: Type of error ICMP packet + we are expecting (Default 11) + """ + if src_ip is None: + src_ip = self.nat_addr + for packet in capture: + try: + self.assertEqual(packet[IP].src, src_ip) + self.assertEqual(packet.haslayer(ICMP), 1) + icmp = packet[ICMP] + self.assertEqual(icmp.type, icmp_type) + self.assertTrue(icmp.haslayer(IPerror)) + inner_ip = icmp[IPerror] + if inner_ip.haslayer(TCPerror): + self.assertEqual(inner_ip[TCPerror].dport, + self.tcp_port_out) + elif inner_ip.haslayer(UDPerror): + self.assertEqual(inner_ip[UDPerror].dport, + self.udp_port_out) + else: + self.assertEqual(inner_ip[ICMPerror].id, self.icmp_id_out) + except: + self.logger.error(ppp("Unexpected or invalid packet " + "(outside network):", packet)) + raise + + def verify_capture_in_with_icmp_errors(self, capture, in_if, icmp_type=11): + """ + Verify captured packets with ICMP errors on inside network + + :param capture: Captured packets + :param in_if: Inside interface + :param icmp_type: Type of error ICMP packet + we are expecting (Default 11) + """ + for packet in capture: + try: + self.assertEqual(packet[IP].dst, in_if.remote_ip4) + self.assertEqual(packet.haslayer(ICMP), 1) + icmp = packet[ICMP] + self.assertEqual(icmp.type, icmp_type) + self.assertTrue(icmp.haslayer(IPerror)) + inner_ip = icmp[IPerror] + if inner_ip.haslayer(TCPerror): + self.assertEqual(inner_ip[TCPerror].sport, + self.tcp_port_in) + elif inner_ip.haslayer(UDPerror): + self.assertEqual(inner_ip[UDPerror].sport, + self.udp_port_in) + else: + self.assertEqual(inner_ip[ICMPerror].id, self.icmp_id_in) + except: + self.logger.error(ppp("Unexpected or invalid packet " + "(inside network):", packet)) + raise + + def create_stream_frag(self, src_if, dst, sport, dport, data, + proto=IP_PROTOS.tcp, echo_reply=False): + """ + Create fragmented packet stream + + :param src_if: Source interface + :param dst: Destination IPv4 address + :param sport: Source port + :param dport: Destination port + :param data: Payload data + :param proto: protocol (TCP, UDP, ICMP) + :param echo_reply: use echo_reply if protocol is ICMP + :returns: Fragments + """ + 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 = random.randint(0, 65535) + 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 reass_frags_and_verify(self, frags, src, dst): + """ + Reassemble and verify fragmented packet + + :param frags: Captured fragments + :param src: Source IPv4 address to verify + :param dst: Destination IPv4 address to verify + + :returns: Reassembled IPv4 packet + """ + 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 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 + + :param data: Decoded IPFIX data records + """ + nat44_ses_create_num = 0 + nat44_ses_delete_num = 0 + self.assertEqual(6, len(data)) + for record in data: + # natEvent + self.assertIn(scapy.compat.orb(record[230]), [4, 5]) + if scapy.compat.orb(record[230]) == 4: + nat44_ses_create_num += 1 + else: + nat44_ses_delete_num += 1 + # sourceIPv4Address + self.assertEqual(self.pg0.remote_ip4, + str(ipaddress.IPv4Address(record[8]))) + # postNATSourceIPv4Address + self.assertEqual(socket.inet_pton(socket.AF_INET, self.nat_addr), + record[225]) + # ingressVRFID + self.assertEqual(struct.pack("!I", 0), record[234]) + # protocolIdentifier/sourceTransportPort + # /postNAPTSourceTransportPort + if IP_PROTOS.icmp == scapy.compat.orb(record[4]): + self.assertEqual(struct.pack("!H", self.icmp_id_in), record[7]) + self.assertEqual(struct.pack("!H", self.icmp_id_out), + record[227]) + elif IP_PROTOS.tcp == scapy.compat.orb(record[4]): + self.assertEqual(struct.pack("!H", self.tcp_port_in), + record[7]) + self.assertEqual(struct.pack("!H", self.tcp_port_out), + record[227]) + elif IP_PROTOS.udp == scapy.compat.orb(record[4]): + self.assertEqual(struct.pack("!H", self.udp_port_in), + record[7]) + self.assertEqual(struct.pack("!H", self.udp_port_out), + record[227]) + else: + self.fail("Invalid protocol") + self.assertEqual(3, nat44_ses_create_num) + self.assertEqual(3, nat44_ses_delete_num) + + def verify_ipfix_addr_exhausted(self, data): + """ + Verify IPFIX NAT addresses event + + :param data: Decoded IPFIX data records + """ + self.assertEqual(1, len(data)) + record = data[0] + # natEvent + self.assertEqual(scapy.compat.orb(record[230]), 3) + # natPoolID + 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 + self.assertEqual(scapy.compat.orb(record[230]), 13) + # natQuotaExceededEvent + self.assertEqual(struct.pack("I", 1), record[466]) + # 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 """ + users = self.vapi.nat44_user_dump() + self.assertEqual(len(users), 0) + users = self.statistics.get_counter('/nat44/total-users') + self.assertEqual(users[0][0], 0) + 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: + 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, 'APMADD' if is_add else 'APMDEL') + sd_params = message.sd.get('napmap') + self.assertTrue(sd_params is not None) + self.assertEqual(sd_params.get('IATYP'), 'IPv4') + self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4) + 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.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") + + for option in pkt[TCP].options: + if option[0] == 'MSS': + self.assertEqual(option[1], mss) + self.assert_tcp_checksum_valid(pkt) + + @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") + + 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 = random.randint(1025, 65535) + + # 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 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, 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, + self.host_in_port, + self.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, + self.server.ip4) + 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) + else: + if not ignore_port: + self.assertNotEqual(p[layer].id, self.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 = random.randint(1025, 65535) + + 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 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 """ + + max_translations = 10240 + max_users = 10240 + + @classmethod + def setUpClass(cls): + super(TestNAT44, 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.udp_external_port = 69 + + cls.create_pg_interfaces(range(10)) + cls.interfaces = list(cls.pg_interfaces[0:4]) + + for i in cls.interfaces: + i.admin_up() + i.config_ip4() + i.resolve_arp() + + cls.pg0.generate_remote_hosts(3) + cls.pg0.configure_ipv4_neighbors() + + cls.pg1.generate_remote_hosts(1) + cls.pg1.configure_ipv4_neighbors() + + cls.overlapping_interfaces = list(list(cls.pg_interfaces[4:7])) + cls.vapi.ip_table_add_del(is_add=1, table={'table_id': 10}) + cls.vapi.ip_table_add_del(is_add=1, table={'table_id': 20}) + + cls.pg4._local_ip4 = "172.16.255.1" + cls.pg4._remote_hosts[0]._ip4 = "172.16.255.2" + cls.pg4.set_table_ip4(10) + cls.pg5._local_ip4 = "172.17.255.3" + cls.pg5._remote_hosts[0]._ip4 = "172.17.255.4" + cls.pg5.set_table_ip4(10) + cls.pg6._local_ip4 = "172.16.255.1" + cls.pg6._remote_hosts[0]._ip4 = "172.16.255.2" + cls.pg6.set_table_ip4(20) + for i in cls.overlapping_interfaces: + i.config_ip4() + i.admin_up() + i.resolve_arp() + + cls.pg7.admin_up() + cls.pg8.admin_up() + + cls.pg9.generate_remote_hosts(2) + cls.pg9.config_ip4() + cls.vapi.sw_interface_add_del_address( + sw_if_index=cls.pg9.sw_if_index, + prefix="10.0.0.1/24") + + cls.pg9.admin_up() + cls.pg9.resolve_arp() + cls.pg9._remote_hosts[1]._ip4 = cls.pg9._remote_hosts[0]._ip4 + cls.pg4._remote_ip4 = cls.pg9._remote_hosts[0]._ip4 = "10.0.0.2" + cls.pg9.resolve_arp() + + def setUp(self): + super(TestNAT44, 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() + if not self.vpp_dead: + self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, + src_port=self.ipfix_src_port, + enable=0) + self.ipfix_src_port = 4739 + self.ipfix_domain_id = 1 + + self.vapi.nat44_plugin_enable_disable(enable=0) + self.vapi.cli("clear logging") + + def test_clear_sessions(self): + """ NAT44 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(0, 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) + + sessions = self.statistics.get_counter('/nat44/total-sessions') + self.assertTrue(sessions[0][0] > 0) + self.logger.info("sessions before clearing: %s" % sessions[0][0]) + + self.vapi.cli("clear nat44 sessions") + + 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) + + # in2out + tcpn = self.statistics.get_counter('/nat44/in2out/slowpath/tcp')[0] + udpn = self.statistics.get_counter('/nat44/in2out/slowpath/udp')[0] + icmpn = self.statistics.get_counter('/nat44/in2out/slowpath/icmp')[0] + drops = self.statistics.get_counter('/nat44/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) + + if_idx = self.pg0.sw_if_index + cnt = self.statistics.get_counter('/nat44/in2out/slowpath/tcp')[0] + self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2) + cnt = self.statistics.get_counter('/nat44/in2out/slowpath/udp')[0] + self.assertEqual(cnt[if_idx] - udpn[if_idx], 1) + cnt = self.statistics.get_counter('/nat44/in2out/slowpath/icmp')[0] + self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1) + cnt = self.statistics.get_counter('/nat44/in2out/slowpath/drops')[0] + self.assertEqual(cnt[if_idx] - drops[if_idx], 0) + + # out2in + tcpn = self.statistics.get_counter('/nat44/out2in/slowpath/tcp')[0] + udpn = self.statistics.get_counter('/nat44/out2in/slowpath/udp')[0] + icmpn = self.statistics.get_counter('/nat44/out2in/slowpath/icmp')[0] + drops = self.statistics.get_counter('/nat44/out2in/slowpath/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/out2in/slowpath/tcp')[0] + self.assertEqual(cnt[if_idx] - tcpn[if_idx], 2) + cnt = self.statistics.get_counter('/nat44/out2in/slowpath/udp')[0] + self.assertEqual(cnt[if_idx] - udpn[if_idx], 1) + cnt = self.statistics.get_counter('/nat44/out2in/slowpath/icmp')[0] + self.assertEqual(cnt[if_idx] - icmpn[if_idx], 1) + cnt = self.statistics.get_counter('/nat44/out2in/slowpath/drops')[0] + self.assertEqual(cnt[if_idx] - drops[if_idx], 0) + + users = self.statistics.get_counter('/nat44/total-users') + self.assertEqual(users[0][0], 1) + sessions = self.statistics.get_counter('/nat44/total-sessions') + self.assertEqual(sessions[0][0], 3) + + def test_dynamic_icmp_errors_in2out_ttl_1(self): + """ NAT44 handling of client packets with TTL=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) + + # Client side - generate traffic + pkts = self.create_stream_in(self.pg0, self.pg1, ttl=1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # Client side - verify ICMP type 11 packets + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in_with_icmp_errors(capture, self.pg0) + + def test_dynamic_icmp_errors_out2in_ttl_1(self): + """ NAT44 handling of server packets with TTL=1 """ + + self.nat44_add_address(self.nat_addr) + 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) + + # Client side - create sessions + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # Server side - generate traffic + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture) + pkts = self.create_stream_out(self.pg1, ttl=1) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # Server side - verify ICMP type 11 packets + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out_with_icmp_errors(capture, + src_ip=self.pg1.local_ip4) + + def test_dynamic_icmp_errors_in2out_ttl_2(self): + """ NAT44 handling of error responses to client packets with TTL=2 """ + + self.nat44_add_address(self.nat_addr) + 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) + + # Client side - generate traffic + pkts = self.create_stream_in(self.pg0, self.pg1, ttl=2) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # Server side - simulate ICMP type 11 response + capture = self.pg1.get_capture(len(pkts)) + pkts = [Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + ICMP(type=11) / packet[IP] for packet in capture] + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # Client side - verify ICMP type 11 packets + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in_with_icmp_errors(capture, self.pg0) + + def test_dynamic_icmp_errors_out2in_ttl_2(self): + """ NAT44 handling of error responses to server packets with TTL=2 """ + + self.nat44_add_address(self.nat_addr) + 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) + + # Client side - create sessions + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # Server side - generate traffic + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture) + pkts = self.create_stream_out(self.pg1, ttl=2) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # Client side - simulate ICMP type 11 response + capture = self.pg0.get_capture(len(pkts)) + pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / + ICMP(type=11) / packet[IP] for packet in capture] + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # Server side - verify ICMP type 11 packets + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out_with_icmp_errors(capture) + + def test_ping_out_interface_from_outside(self): + """ Ping NAT44 out interface from outside network """ + + self.nat44_add_address(self.nat_addr) + 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.pg1.local_ip4) / + ICMP(id=self.icmp_id_out, type='echo-request')) + pkts = [p] + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + packet = capture[0] + try: + self.assertEqual(packet[IP].src, self.pg1.local_ip4) + self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) + self.assertEqual(packet[ICMP].id, self.icmp_id_in) + self.assertEqual(packet[ICMP].type, 0) # echo reply + except: + self.logger.error(ppp("Unexpected or invalid packet " + "(outside network):", packet)) + raise + + def test_ping_internal_host_from_outside(self): + """ Ping internal host from outside network """ + + self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr) + 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) + + # out2in + pkt = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr, ttl=64) / + ICMP(id=self.icmp_id_out, type='echo-request')) + self.pg1.add_stream(pkt) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + self.verify_capture_in(capture, self.pg0) + self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp) + + # in2out + pkt = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) / + ICMP(id=self.icmp_id_in, type='echo-reply')) + self.pg0.add_stream(pkt) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(1) + self.verify_capture_out(capture, same_port=True) + self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp) + + 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: + # 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) + + # 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 + + 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_in(self): + """ 1:1 NAT initialized from inside network """ + + nat_ip = "10.0.0.10" + self.tcp_port_out = 6303 + self.udp_port_out = 6304 + self.icmp_id_out = 6305 + + self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) + 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) + sm = self.vapi.nat44_static_mapping_dump() + self.assertEqual(len(sm), 1) + self.assertEqual(sm[0].tag, '') + self.assertEqual(sm[0].protocol, 0) + self.assertEqual(sm[0].local_port, 0) + self.assertEqual(sm[0].external_port, 0) + + # in2out + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture, nat_ip, True) + + # out2in + pkts = self.create_stream_out(self.pg1, nat_ip) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg0) + + def test_static_out(self): + """ 1:1 NAT initialized from outside network """ + + nat_ip = "10.0.0.20" + self.tcp_port_out = 6303 + self.udp_port_out = 6304 + self.icmp_id_out = 6305 + tag = "testTAG" + + self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip, tag=tag) + 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) + sm = self.vapi.nat44_static_mapping_dump() + self.assertEqual(len(sm), 1) + self.assertEqual(sm[0].tag, tag) + + # out2in + pkts = self.create_stream_out(self.pg1, nat_ip) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg0) + + # in2out + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture, nat_ip, True) + + def test_static_with_port_in(self): + """ 1:1 NAPT initialized from inside network """ + + self.tcp_port_out = 3606 + self.udp_port_out = 3607 + self.icmp_id_out = 3608 + + self.nat44_add_address(self.nat_addr) + self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + self.tcp_port_in, self.tcp_port_out, + proto=IP_PROTOS.tcp) + self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + self.udp_port_in, self.udp_port_out, + proto=IP_PROTOS.udp) + self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + self.icmp_id_in, self.icmp_id_out, + proto=IP_PROTOS.icmp) + 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 + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture) + + # out2in + pkts = self.create_stream_out(self.pg1) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg0) + + def test_static_with_port_out(self): + """ 1:1 NAPT initialized from outside network """ + + self.tcp_port_out = 30606 + self.udp_port_out = 30607 + self.icmp_id_out = 30608 + + self.nat44_add_address(self.nat_addr) + self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + self.tcp_port_in, self.tcp_port_out, + proto=IP_PROTOS.tcp) + self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + self.udp_port_in, self.udp_port_out, + proto=IP_PROTOS.udp) + self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, + self.icmp_id_in, self.icmp_id_out, + proto=IP_PROTOS.icmp) + 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) + + # out2in + pkts = self.create_stream_out(self.pg1) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg0) + + # in2out + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture) + + def test_static_vrf_aware(self): + """ 1:1 NAT VRF awareness """ + + nat_ip1 = "10.0.0.30" + nat_ip2 = "10.0.0.40" + self.tcp_port_out = 6303 + self.udp_port_out = 6304 + self.icmp_id_out = 6305 + + self.nat44_add_static_mapping(self.pg4.remote_ip4, nat_ip1, + vrf_id=10) + self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip2, + vrf_id=10) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg3.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.pg4.sw_if_index, + flags=flags, is_add=1) + + # inside interface VRF match NAT44 static mapping VRF + pkts = self.create_stream_in(self.pg4, self.pg3) + self.pg4.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg3.get_capture(len(pkts)) + self.verify_capture_out(capture, nat_ip1, True) + + # inside interface VRF don't match NAT44 static mapping VRF (packets + # are dropped) + pkts = self.create_stream_in(self.pg0, self.pg3) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg3.assert_nothing_captured() + + def test_dynamic_to_static(self): + """ Switch from dynamic translation to 1:1NAT """ + nat_ip = "10.0.0.10" + self.tcp_port_out = 6303 + self.udp_port_out = 6304 + self.icmp_id_out = 6305 + + 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) + + # dynamic + 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) + + # 1:1NAT + self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions), 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, nat_ip, True) + + def test_identity_nat(self): + """ 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, + flags=flags, is_add=1) + 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(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / + IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) / + TCP(sport=12345, dport=56789)) + 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(ip.src, self.pg1.remote_ip4) + self.assertEqual(tcp.dport, 56789) + self.assertEqual(tcp.sport, 12345) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(len(sessions), 0) + 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, + flags=flags, vrf_id=1, is_add=1) + identity_mappings = self.vapi.nat44_identity_mapping_dump() + self.assertEqual(len(identity_mappings), 2) + + def test_multiple_inside_interfaces(self): + """ NAT44 multiple non-overlapping address space inside interfaces """ + + 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, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg3.sw_if_index, + is_add=1) + + # between two NAT44 inside interfaces (no translation) + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_no_translation(capture, self.pg0, self.pg1) + + # from NAT44 inside to interface without NAT44 feature (no translation) + pkts = self.create_stream_in(self.pg0, self.pg2) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg2.get_capture(len(pkts)) + self.verify_capture_no_translation(capture, self.pg0, self.pg2) + + # in2out 1st interface + pkts = self.create_stream_in(self.pg0, self.pg3) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg3.get_capture(len(pkts)) + self.verify_capture_out(capture) + + # out2in 1st interface + pkts = self.create_stream_out(self.pg3) + self.pg3.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg0) + + # in2out 2nd interface + pkts = self.create_stream_in(self.pg1, self.pg3) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg3.get_capture(len(pkts)) + self.verify_capture_out(capture) + + # out2in 2nd interface + pkts = self.create_stream_out(self.pg3) + self.pg3.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg1) + + def test_inside_overlapping_interfaces(self): + """ NAT44 multiple inside interfaces with overlapping address space """ + + static_nat_ip = "10.0.0.10" + self.nat44_add_address(self.nat_addr) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg3.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) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg5.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg6.sw_if_index, + flags=flags, is_add=1) + self.nat44_add_static_mapping(self.pg6.remote_ip4, static_nat_ip, + vrf_id=20) + + # between NAT44 inside interfaces with same VRF (no translation) + pkts = self.create_stream_in(self.pg4, self.pg5) + self.pg4.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg5.get_capture(len(pkts)) + self.verify_capture_no_translation(capture, self.pg4, self.pg5) + + # between NAT44 inside interfaces with different VRF (hairpinning) + p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / + IP(src=self.pg4.remote_ip4, dst=static_nat_ip) / + TCP(sport=1234, dport=5678)) + self.pg4.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg6.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.src, self.nat_addr) + self.assertEqual(ip.dst, self.pg6.remote_ip4) + self.assertNotEqual(tcp.sport, 1234) + self.assertEqual(tcp.dport, 5678) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # in2out 1st interface + pkts = self.create_stream_in(self.pg4, self.pg3) + self.pg4.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg3.get_capture(len(pkts)) + self.verify_capture_out(capture) + + # out2in 1st interface + pkts = self.create_stream_out(self.pg3) + self.pg3.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg4.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg4) + + # in2out 2nd interface + pkts = self.create_stream_in(self.pg5, self.pg3) + self.pg5.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg3.get_capture(len(pkts)) + self.verify_capture_out(capture) + + # out2in 2nd interface + pkts = self.create_stream_out(self.pg3) + self.pg3.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg5.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg5) + + # pg5 session dump + addresses = self.vapi.nat44_address_dump() + self.assertEqual(len(addresses), 1) + sessions = self.vapi.nat44_user_session_dump(self.pg5.remote_ip4, 10) + self.assertEqual(len(sessions), 3) + for session in sessions: + self.assertFalse(session.flags & self.config_flags.NAT_IS_STATIC) + self.assertEqual(str(session.inside_ip_address), + self.pg5.remote_ip4) + self.assertEqual(session.outside_ip_address, + addresses[0].ip_address) + self.assertEqual(sessions[0].protocol, IP_PROTOS.tcp) + self.assertEqual(sessions[1].protocol, IP_PROTOS.udp) + self.assertEqual(sessions[2].protocol, IP_PROTOS.icmp) + self.assertEqual(sessions[0].inside_port, self.tcp_port_in) + self.assertEqual(sessions[1].inside_port, self.udp_port_in) + self.assertEqual(sessions[2].inside_port, self.icmp_id_in) + self.assertEqual(sessions[0].outside_port, self.tcp_port_out) + self.assertEqual(sessions[1].outside_port, self.udp_port_out) + self.assertEqual(sessions[2].outside_port, self.icmp_id_out) + + # in2out 3rd interface + pkts = self.create_stream_in(self.pg6, self.pg3) + self.pg6.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg3.get_capture(len(pkts)) + self.verify_capture_out(capture, static_nat_ip, True) + + # out2in 3rd interface + pkts = self.create_stream_out(self.pg3, static_nat_ip) + self.pg3.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg6.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg6) + + # general user and session dump verifications + users = self.vapi.nat44_user_dump() + self.assertGreaterEqual(len(users), 3) + addresses = self.vapi.nat44_address_dump() + self.assertEqual(len(addresses), 1) + for user in users: + sessions = self.vapi.nat44_user_session_dump(user.ip_address, + user.vrf_id) + for session in sessions: + self.assertEqual(user.ip_address, session.inside_ip_address) + self.assertTrue(session.total_bytes > session.total_pkts > 0) + self.assertTrue(session.protocol in + [IP_PROTOS.tcp, IP_PROTOS.udp, + IP_PROTOS.icmp]) + self.assertFalse(session.flags & + self.config_flags.NAT_IS_EXT_HOST_VALID) + + # pg4 session dump + sessions = self.vapi.nat44_user_session_dump(self.pg4.remote_ip4, 10) + self.assertGreaterEqual(len(sessions), 4) + for session in sessions: + self.assertFalse(session.flags & self.config_flags.NAT_IS_STATIC) + self.assertEqual(str(session.inside_ip_address), + self.pg4.remote_ip4) + self.assertEqual(session.outside_ip_address, + addresses[0].ip_address) + + # pg6 session dump + sessions = self.vapi.nat44_user_session_dump(self.pg6.remote_ip4, 20) + self.assertGreaterEqual(len(sessions), 3) + for session in sessions: + self.assertTrue(session.flags & self.config_flags.NAT_IS_STATIC) + self.assertEqual(str(session.inside_ip_address), + self.pg6.remote_ip4) + self.assertEqual(str(session.outside_ip_address), + static_nat_ip) + self.assertTrue(session.inside_port in + [self.tcp_port_in, self.udp_port_in, + self.icmp_id_in]) + + def test_hairpinning(self): + """ NAT44 hairpinning - 1:1 NAPT """ + + host = self.pg0.remote_hosts[0] + server = self.pg0.remote_hosts[1] + host_in_port = 1234 + host_out_port = 0 + server_in_port = 5678 + server_out_port = 8765 + + self.nat44_add_address(self.nat_addr) + 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, self.nat_addr, + server_in_port, server_out_port, + proto=IP_PROTOS.tcp) + + cnt = self.statistics.get_counter('/nat44/hairpinning')[0] + # send packet from host to server + p = (Ether(src=host.mac, dst=self.pg0.local_mac) / + IP(src=host.ip4, dst=self.nat_addr) / + TCP(sport=host_in_port, dport=server_out_port)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.src, self.nat_addr) + self.assertEqual(ip.dst, server.ip4) + self.assertNotEqual(tcp.sport, host_in_port) + self.assertEqual(tcp.dport, server_in_port) + self.assert_packet_checksums_valid(p) + host_out_port = tcp.sport + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + after = self.statistics.get_counter('/nat44/hairpinning')[0] + if_idx = self.pg0.sw_if_index + self.assertEqual(after[if_idx] - cnt[if_idx], 1) + + # send reply from server to host + p = (Ether(src=server.mac, dst=self.pg0.local_mac) / + IP(src=server.ip4, dst=self.nat_addr) / + TCP(sport=server_in_port, dport=host_out_port)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.src, self.nat_addr) + self.assertEqual(ip.dst, host.ip4) + self.assertEqual(tcp.sport, server_out_port) + self.assertEqual(tcp.dport, host_in_port) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + after = self.statistics.get_counter('/nat44/hairpinning')[0] + if_idx = self.pg0.sw_if_index + self.assertEqual(after[if_idx] - cnt[if_idx], 2) + + def test_hairpinning2(self): + """ NAT44 hairpinning - 1:1 NAT""" + + server1_nat_ip = "10.0.0.10" + server2_nat_ip = "10.0.0.11" + host = self.pg0.remote_hosts[0] + server1 = self.pg0.remote_hosts[1] + server2 = self.pg0.remote_hosts[2] + server_tcp_port = 22 + server_udp_port = 20 + + self.nat44_add_address(self.nat_addr) + 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 servers + self.nat44_add_static_mapping(server1.ip4, server1_nat_ip) + self.nat44_add_static_mapping(server2.ip4, server2_nat_ip) + + # host to server1 + pkts = [] + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=host.ip4, dst=server1_nat_ip) / + TCP(sport=self.tcp_port_in, dport=server_tcp_port)) + pkts.append(p) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=host.ip4, dst=server1_nat_ip) / + UDP(sport=self.udp_port_in, dport=server_udp_port)) + pkts.append(p) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=host.ip4, dst=server1_nat_ip) / + ICMP(id=self.icmp_id_in, type='echo-request')) + pkts.append(p) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + for packet in capture: + try: + self.assertEqual(packet[IP].src, self.nat_addr) + self.assertEqual(packet[IP].dst, server1.ip4) + if packet.haslayer(TCP): + self.assertNotEqual(packet[TCP].sport, self.tcp_port_in) + self.assertEqual(packet[TCP].dport, server_tcp_port) + self.tcp_port_out = packet[TCP].sport + self.assert_packet_checksums_valid(packet) + elif packet.haslayer(UDP): + self.assertNotEqual(packet[UDP].sport, self.udp_port_in) + self.assertEqual(packet[UDP].dport, server_udp_port) + self.udp_port_out = packet[UDP].sport + else: + self.assertNotEqual(packet[ICMP].id, self.icmp_id_in) + self.icmp_id_out = packet[ICMP].id + except: + self.logger.error(ppp("Unexpected or invalid packet:", packet)) + raise + + # server1 to host + pkts = [] + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=server1.ip4, dst=self.nat_addr) / + TCP(sport=server_tcp_port, dport=self.tcp_port_out)) + pkts.append(p) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=server1.ip4, dst=self.nat_addr) / + UDP(sport=server_udp_port, dport=self.udp_port_out)) + pkts.append(p) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=server1.ip4, dst=self.nat_addr) / + ICMP(id=self.icmp_id_out, type='echo-reply')) + pkts.append(p) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + for packet in capture: + try: + self.assertEqual(packet[IP].src, server1_nat_ip) + self.assertEqual(packet[IP].dst, host.ip4) + if packet.haslayer(TCP): + self.assertEqual(packet[TCP].dport, self.tcp_port_in) + self.assertEqual(packet[TCP].sport, server_tcp_port) + self.assert_packet_checksums_valid(packet) + elif packet.haslayer(UDP): + self.assertEqual(packet[UDP].dport, self.udp_port_in) + self.assertEqual(packet[UDP].sport, server_udp_port) + else: + self.assertEqual(packet[ICMP].id, self.icmp_id_in) + except: + self.logger.error(ppp("Unexpected or invalid packet:", packet)) + raise + + # server2 to server1 + pkts = [] + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=server2.ip4, dst=server1_nat_ip) / + TCP(sport=self.tcp_port_in, dport=server_tcp_port)) + pkts.append(p) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=server2.ip4, dst=server1_nat_ip) / + UDP(sport=self.udp_port_in, dport=server_udp_port)) + pkts.append(p) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=server2.ip4, dst=server1_nat_ip) / + ICMP(id=self.icmp_id_in, type='echo-request')) + pkts.append(p) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + for packet in capture: + try: + self.assertEqual(packet[IP].src, server2_nat_ip) + self.assertEqual(packet[IP].dst, server1.ip4) + if packet.haslayer(TCP): + self.assertEqual(packet[TCP].sport, self.tcp_port_in) + self.assertEqual(packet[TCP].dport, server_tcp_port) + self.tcp_port_out = packet[TCP].sport + self.assert_packet_checksums_valid(packet) + elif packet.haslayer(UDP): + self.assertEqual(packet[UDP].sport, self.udp_port_in) + self.assertEqual(packet[UDP].dport, server_udp_port) + self.udp_port_out = packet[UDP].sport + else: + self.assertEqual(packet[ICMP].id, self.icmp_id_in) + self.icmp_id_out = packet[ICMP].id + except: + self.logger.error(ppp("Unexpected or invalid packet:", packet)) + raise + + # server1 to server2 + pkts = [] + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=server1.ip4, dst=server2_nat_ip) / + TCP(sport=server_tcp_port, dport=self.tcp_port_out)) + pkts.append(p) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=server1.ip4, dst=server2_nat_ip) / + UDP(sport=server_udp_port, dport=self.udp_port_out)) + pkts.append(p) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=server1.ip4, dst=server2_nat_ip) / + ICMP(id=self.icmp_id_out, type='echo-reply')) + pkts.append(p) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + for packet in capture: + try: + self.assertEqual(packet[IP].src, server1_nat_ip) + self.assertEqual(packet[IP].dst, server2.ip4) + if packet.haslayer(TCP): + self.assertEqual(packet[TCP].dport, self.tcp_port_in) + self.assertEqual(packet[TCP].sport, server_tcp_port) + self.assert_packet_checksums_valid(packet) + elif packet.haslayer(UDP): + self.assertEqual(packet[UDP].dport, self.udp_port_in) + self.assertEqual(packet[UDP].sport, server_udp_port) + else: + self.assertEqual(packet[ICMP].id, self.icmp_id_in) + except: + self.logger.error(ppp("Unexpected or invalid packet:", packet)) + raise + + def test_interface_addr(self): + """ Acquire NAT44 addresses from interface """ + self.vapi.nat44_add_del_interface_addr( + is_add=1, + sw_if_index=self.pg7.sw_if_index) + + # no address in NAT pool + addresses = self.vapi.nat44_address_dump() + self.assertEqual(0, len(addresses)) + + # configure interface address and check NAT address pool + self.pg7.config_ip4() + addresses = self.vapi.nat44_address_dump() + self.assertEqual(1, len(addresses)) + self.assertEqual(str(addresses[0].ip_address), self.pg7.local_ip4) + + # remove interface address and check NAT address pool + self.pg7.unconfig_ip4() + addresses = self.vapi.nat44_address_dump() + self.assertEqual(0, len(addresses)) + + def test_interface_addr_static_mapping(self): + """ Static mapping with addresses from interface """ + tag = "testTAG" + + self.vapi.nat44_add_del_interface_addr( + is_add=1, + sw_if_index=self.pg7.sw_if_index) + self.nat44_add_static_mapping( + '1.2.3.4', + external_sw_if_index=self.pg7.sw_if_index, + tag=tag) + + # static mappings with external interface + static_mappings = self.vapi.nat44_static_mapping_dump() + self.assertEqual(1, len(static_mappings)) + self.assertEqual(self.pg7.sw_if_index, + static_mappings[0].external_sw_if_index) + self.assertEqual(static_mappings[0].tag, tag) + + # configure interface address and check static mappings + self.pg7.config_ip4() + static_mappings = self.vapi.nat44_static_mapping_dump() + self.assertEqual(2, len(static_mappings)) + resolved = False + for sm in static_mappings: + if sm.external_sw_if_index == 0xFFFFFFFF: + self.assertEqual(str(sm.external_ip_address), + self.pg7.local_ip4) + self.assertEqual(sm.tag, tag) + resolved = True + self.assertTrue(resolved) + + # remove interface address and check static mappings + self.pg7.unconfig_ip4() + static_mappings = self.vapi.nat44_static_mapping_dump() + self.assertEqual(1, len(static_mappings)) + self.assertEqual(self.pg7.sw_if_index, + static_mappings[0].external_sw_if_index) + self.assertEqual(static_mappings[0].tag, tag) + + # configure interface address again and check static mappings + self.pg7.config_ip4() + static_mappings = self.vapi.nat44_static_mapping_dump() + self.assertEqual(2, len(static_mappings)) + resolved = False + for sm in static_mappings: + if sm.external_sw_if_index == 0xFFFFFFFF: + self.assertEqual(str(sm.external_ip_address), + self.pg7.local_ip4) + self.assertEqual(sm.tag, tag) + resolved = True + self.assertTrue(resolved) + + # remove static mapping + self.nat44_add_static_mapping( + '1.2.3.4', + external_sw_if_index=self.pg7.sw_if_index, + tag=tag, + is_add=0) + static_mappings = self.vapi.nat44_static_mapping_dump() + self.assertEqual(0, len(static_mappings)) + + def test_interface_addr_identity_nat(self): + """ Identity NAT with addresses from interface """ + + port = 53053 + self.vapi.nat44_add_del_interface_addr( + is_add=1, + sw_if_index=self.pg7.sw_if_index) + self.vapi.nat44_add_del_identity_mapping( + ip_address=b'0', + sw_if_index=self.pg7.sw_if_index, + port=port, + protocol=IP_PROTOS.tcp, + is_add=1) + + # identity mappings with external interface + identity_mappings = self.vapi.nat44_identity_mapping_dump() + self.assertEqual(1, len(identity_mappings)) + self.assertEqual(self.pg7.sw_if_index, + identity_mappings[0].sw_if_index) + + # configure interface address and check identity mappings + self.pg7.config_ip4() + identity_mappings = self.vapi.nat44_identity_mapping_dump() + resolved = False + self.assertEqual(2, len(identity_mappings)) + for sm in identity_mappings: + if sm.sw_if_index == 0xFFFFFFFF: + self.assertEqual(str(identity_mappings[0].ip_address), + self.pg7.local_ip4) + self.assertEqual(port, identity_mappings[0].port) + self.assertEqual(IP_PROTOS.tcp, identity_mappings[0].protocol) + resolved = True + self.assertTrue(resolved) + + # remove interface address and check identity mappings + self.pg7.unconfig_ip4() + identity_mappings = self.vapi.nat44_identity_mapping_dump() + self.assertEqual(1, len(identity_mappings)) + self.assertEqual(self.pg7.sw_if_index, + identity_mappings[0].sw_if_index) + + def test_ipfix_nat44_sess(self): + """ IPFIX logging NAT44 session created/deleted """ + self.ipfix_domain_id = 10 + self.ipfix_src_port = 20202 + collector_port = 30303 + bind_layers(UDP, IPFIX, dport=30303) + 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.set_ipfix_exporter(collector_address=self.pg3.remote_ip4, + src_address=self.pg3.local_ip4, + path_mtu=512, + template_interval=10, + collector_port=collector_port) + self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, + src_port=self.ipfix_src_port, + enable=1) + + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture) + self.nat44_add_address(self.nat_addr, is_add=0) + self.vapi.ipfix_flush() + capture = self.pg3.get_capture(7) + 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, collector_port) + self.assertEqual(p[IPFIX].observationDomainID, + self.ipfix_domain_id) + if p.haslayer(Template): + ipfix.add_template(p.getlayer(Template)) + # verify events in data set + for p in capture: + if p.haslayer(Data): + data = ipfix.decode_data_set(p.getlayer(Set)) + self.verify_ipfix_nat44_ses(data) + + def test_ipfix_addr_exhausted(self): + """ IPFIX logging NAT addresses exhausted """ + 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.set_ipfix_exporter(collector_address=self.pg3.remote_ip4, + src_address=self.pg3.local_ip4, + path_mtu=512, + template_interval=10) + self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, + src_port=self.ipfix_src_port, + enable=1) + + p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / + IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / + TCP(sport=3025)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + sleep(1) + self.vapi.ipfix_flush() + capture = self.pg3.get_capture(7) + ipfix = IPFIXDecoder() + # first load template + for p in capture: + self.assertTrue(p.haslayer(IPFIX)) + self.assertEqual(p[IP].src, self.pg3.local_ip4) + self.assertEqual(p[IP].dst, self.pg3.remote_ip4) + self.assertEqual(p[UDP].sport, self.ipfix_src_port) + self.assertEqual(p[UDP].dport, 4739) + self.assertEqual(p[IPFIX].observationDomainID, + self.ipfix_domain_id) + if p.haslayer(Template): + ipfix.add_template(p.getlayer(Template)) + # verify events in data set + for p in capture: + if p.haslayer(Data): + data = ipfix.decode_data_set(p.getlayer(Set)) + self.verify_ipfix_addr_exhausted(data) + + @unittest.skipUnless(running_extended_tests, "part of extended tests") + def test_ipfix_max_sessions(self): + """ 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( + 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) + + max_sessions = self.max_translations + + pkts = [] + for i in range(0, max_sessions): + src = "10.10.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=src, dst=self.pg1.remote_ip4) / + TCP(sport=1025)) + pkts.append(p) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + self.pg1.get_capture(max_sessions) + self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4, + src_address=self.pg3.local_ip4, + path_mtu=512, + template_interval=10) + self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, + src_port=self.ipfix_src_port, + enable=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=1025)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + sleep(1) + self.vapi.ipfix_flush() + capture = self.pg3.get_capture(7) + 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_sessions(data, max_sessions) + + def test_syslog_apmap(self): + """ Test 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) + 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=20)) + 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_apmap(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.pg3.get_capture(1) + self.verify_syslog_apmap(capture[0][Raw].load, False) + + def test_pool_addr_fib(self): + """ NAT44 add pool addresses to FIB """ + static_addr = '10.0.0.10' + self.nat44_add_address(self.nat_addr) + 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_static_mapping(self.pg0.remote_ip4, static_addr) + + # NAT44 address + p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / + ARP(op=ARP.who_has, pdst=self.nat_addr, + psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(1) + self.assertTrue(capture[0].haslayer(ARP)) + self.assertTrue(capture[0][ARP].op, ARP.is_at) + + # 1:1 NAT address + p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / + ARP(op=ARP.who_has, pdst=static_addr, + psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(1) + self.assertTrue(capture[0].haslayer(ARP)) + self.assertTrue(capture[0][ARP].op, ARP.is_at) + + # send ARP to non-NAT44 interface + p = (Ether(src=self.pg2.remote_mac, dst='ff:ff:ff:ff:ff:ff') / + ARP(op=ARP.who_has, pdst=self.nat_addr, + psrc=self.pg2.remote_ip4, hwsrc=self.pg2.remote_mac)) + self.pg2.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + + # remove addresses and verify + self.nat44_add_address(self.nat_addr, is_add=0) + self.nat44_add_static_mapping(self.pg0.remote_ip4, static_addr, + is_add=0) + + p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / + ARP(op=ARP.who_has, pdst=self.nat_addr, + psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + + p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / + ARP(op=ARP.who_has, pdst=static_addr, + psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.assert_nothing_captured() + + def test_vrf_mode(self): + """ NAT44 tenant VRF aware address pool mode """ + + vrf_id1 = 1 + vrf_id2 = 2 + nat_ip1 = "10.0.0.10" + nat_ip2 = "10.0.0.11" + + self.pg0.unconfig_ip4() + self.pg1.unconfig_ip4() + self.vapi.ip_table_add_del(is_add=1, table={'table_id': vrf_id1}) + self.vapi.ip_table_add_del(is_add=1, table={'table_id': vrf_id2}) + self.pg0.set_table_ip4(vrf_id1) + self.pg1.set_table_ip4(vrf_id2) + self.pg0.config_ip4() + self.pg1.config_ip4() + self.pg0.resolve_arp() + self.pg1.resolve_arp() + + self.nat44_add_address(nat_ip1, vrf_id=vrf_id1) + self.nat44_add_address(nat_ip2, vrf_id=vrf_id2) + 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, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg2.sw_if_index, + is_add=1) + + try: + # first VRF + pkts = self.create_stream_in(self.pg0, self.pg2) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg2.get_capture(len(pkts)) + self.verify_capture_out(capture, nat_ip1) + + # second VRF + pkts = self.create_stream_in(self.pg1, self.pg2) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg2.get_capture(len(pkts)) + self.verify_capture_out(capture, nat_ip2) + + finally: + self.pg0.unconfig_ip4() + self.pg1.unconfig_ip4() + self.pg0.set_table_ip4(0) + self.pg1.set_table_ip4(0) + self.pg0.config_ip4() + self.pg1.config_ip4() + self.pg0.resolve_arp() + self.pg1.resolve_arp() + self.vapi.ip_table_add_del(is_add=0, table={'table_id': vrf_id1}) + 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 """ + + nat_ip1 = "10.0.0.10" + nat_ip2 = "10.0.0.11" + + self.nat44_add_address(nat_ip1) + self.nat44_add_address(nat_ip2, vrf_id=99) + 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, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg2.sw_if_index, + is_add=1) + + # first VRF + pkts = self.create_stream_in(self.pg0, self.pg2) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg2.get_capture(len(pkts)) + self.verify_capture_out(capture, nat_ip1) + + # second VRF + pkts = self.create_stream_in(self.pg1, self.pg2) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg2.get_capture(len(pkts)) + self.verify_capture_out(capture, nat_ip1) + + def 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 """ + self.create_routes_and_neigbors() + 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.pg7.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg8.sw_if_index, + is_add=1) + + # in2out + pkts = self.create_stream_in(self.pg7, self.pg8) + self.pg7.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg8.get_capture(len(pkts)) + self.verify_capture_out(capture) + + # out2in + pkts = self.create_stream_out(self.pg8, self.nat_addr) + self.pg8.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg7.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg7) + + def test_static_ipless_interfaces(self): + """ NAT44 interfaces without configured IP address - 1:1 NAT """ + + self.create_routes_and_neigbors() + self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg7.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg8.sw_if_index, + is_add=1) + + # out2in + pkts = self.create_stream_out(self.pg8) + self.pg8.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg7.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg7) + + # in2out + pkts = self.create_stream_in(self.pg7, self.pg8) + self.pg7.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg8.get_capture(len(pkts)) + self.verify_capture_out(capture, self.nat_addr, True) + + def test_static_with_port_ipless_interfaces(self): + """ NAT44 interfaces without configured IP address - 1:1 NAPT """ + + self.tcp_port_out = 30606 + self.udp_port_out = 30607 + self.icmp_id_out = 30608 + + self.create_routes_and_neigbors() + self.nat44_add_address(self.nat_addr) + self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr, + self.tcp_port_in, self.tcp_port_out, + proto=IP_PROTOS.tcp) + self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr, + self.udp_port_in, self.udp_port_out, + proto=IP_PROTOS.udp) + self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr, + self.icmp_id_in, self.icmp_id_out, + proto=IP_PROTOS.icmp) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg7.sw_if_index, + flags=flags, is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg8.sw_if_index, + is_add=1) + + # out2in + pkts = self.create_stream_out(self.pg8) + self.pg8.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg7.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg7) + + # in2out + pkts = self.create_stream_in(self.pg7, self.pg8) + self.pg7.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg8.get_capture(len(pkts)) + self.verify_capture_out(capture) + + def test_static_unknown_proto(self): + """ 1:1 NAT translate packet with unknown protocol """ + nat_ip = "10.0.0.10" + self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) + 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) / + GRE() / + IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / + TCP(sport=1234, dport=1234)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + p = self.pg1.get_capture(1) + packet = p[0] + try: + self.assertEqual(packet[IP].src, nat_ip) + self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) + self.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=nat_ip) / + GRE() / + IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) / + TCP(sport=1234, dport=1234)) + self.pg1.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + p = self.pg0.get_capture(1) + packet = p[0] + try: + self.assertEqual(packet[IP].src, self.pg1.remote_ip4) + self.assertEqual(packet[IP].dst, self.pg0.remote_ip4) + self.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_static_unknown_proto(self): + """ 1:1 NAT translate packet with unknown protocol - hairpinning """ + + host = self.pg0.remote_hosts[0] + server = self.pg0.remote_hosts[1] + + host_nat_ip = "10.0.0.10" + server_nat_ip = "10.0.0.11" + + self.nat44_add_static_mapping(host.ip4, host_nat_ip) + self.nat44_add_static_mapping(server.ip4, server_nat_ip) + 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) + + # host to server + p = (Ether(dst=self.pg0.local_mac, src=host.mac) / + IP(src=host.ip4, dst=server_nat_ip) / + GRE() / + IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / + TCP(sport=1234, dport=1234)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + p = self.pg0.get_capture(1) + packet = p[0] + try: + self.assertEqual(packet[IP].src, host_nat_ip) + self.assertEqual(packet[IP].dst, server.ip4) + self.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=host_nat_ip) / + GRE() / + IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) / + TCP(sport=1234, dport=1234)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + p = self.pg0.get_capture(1) + packet = p[0] + try: + self.assertEqual(packet[IP].src, server_nat_ip) + self.assertEqual(packet[IP].dst, host.ip4) + self.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(self): + """ NAT44 interface 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( + is_add=1, flags=flags, + sw_if_index=self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_output_feature( + is_add=1, flags=flags, + sw_if_index=self.pg1.sw_if_index) + self.vapi.nat44_interface_add_del_output_feature( + is_add=1, + sw_if_index=self.pg3.sw_if_index) + + # in2out + pkts = self.create_stream_in(self.pg0, self.pg3) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg3.get_capture(len(pkts)) + self.verify_capture_out(capture) + + # out2in + pkts = self.create_stream_out(self.pg3) + self.pg3.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg0) + + # from non-NAT interface to NAT inside interface + pkts = self.create_stream_in(self.pg2, self.pg0) + self.pg2.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + 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) """ + nat_ip_vrf10 = "10.0.0.10" + nat_ip_vrf20 = "10.0.0.20" + + r1 = VppIpRoute(self, self.pg3.remote_ip4, 32, + [VppRoutePath(self.pg3.remote_ip4, + self.pg3.sw_if_index)], + table_id=10) + r2 = VppIpRoute(self, self.pg3.remote_ip4, 32, + [VppRoutePath(self.pg3.remote_ip4, + self.pg3.sw_if_index)], + table_id=20) + r1.add_vpp_config() + r2.add_vpp_config() + + self.nat44_add_address(nat_ip_vrf10, vrf_id=10) + self.nat44_add_address(nat_ip_vrf20, vrf_id=20) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_output_feature( + is_add=1, flags=flags, + sw_if_index=self.pg4.sw_if_index) + self.vapi.nat44_interface_add_del_output_feature( + is_add=1, flags=flags, + sw_if_index=self.pg6.sw_if_index) + self.vapi.nat44_interface_add_del_output_feature( + is_add=1, + sw_if_index=self.pg3.sw_if_index) + + # in2out VRF 10 + pkts = self.create_stream_in(self.pg4, self.pg3) + self.pg4.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg3.get_capture(len(pkts)) + self.verify_capture_out(capture, nat_ip=nat_ip_vrf10) + + # out2in VRF 10 + pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf10) + self.pg3.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg4.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg4) + + # in2out VRF 20 + pkts = self.create_stream_in(self.pg6, self.pg3) + self.pg6.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg3.get_capture(len(pkts)) + self.verify_capture_out(capture, nat_ip=nat_ip_vrf20) + + # out2in VRF 20 + pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf20) + self.pg3.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg6.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg6) + + def test_output_feature_hairpinning(self): + """ NAT44 interface output feature hairpinning (in2out postrouting) """ + host = self.pg0.remote_hosts[0] + server = self.pg0.remote_hosts[1] + host_in_port = 1234 + host_out_port = 0 + server_in_port = 5678 + server_out_port = 8765 + + self.nat44_add_address(self.nat_addr) + flags = self.config_flags.NAT_IS_INSIDE + self.vapi.nat44_interface_add_del_output_feature( + is_add=1, flags=flags, + sw_if_index=self.pg0.sw_if_index) + self.vapi.nat44_interface_add_del_output_feature( + is_add=1, + sw_if_index=self.pg1.sw_if_index) + + # add static mapping for server + self.nat44_add_static_mapping(server.ip4, self.nat_addr, + server_in_port, server_out_port, + proto=IP_PROTOS.tcp) + + # send packet from host to server + p = (Ether(src=host.mac, dst=self.pg0.local_mac) / + IP(src=host.ip4, dst=self.nat_addr) / + TCP(sport=host_in_port, dport=server_out_port)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.src, self.nat_addr) + self.assertEqual(ip.dst, server.ip4) + self.assertNotEqual(tcp.sport, host_in_port) + self.assertEqual(tcp.dport, server_in_port) + self.assert_packet_checksums_valid(p) + host_out_port = tcp.sport + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # send reply from server to host + p = (Ether(src=server.mac, dst=self.pg0.local_mac) / + IP(src=server.ip4, dst=self.nat_addr) / + TCP(sport=server_in_port, dport=host_out_port)) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(1) + p = capture[0] + try: + ip = p[IP] + tcp = p[TCP] + self.assertEqual(ip.src, self.nat_addr) + self.assertEqual(ip.dst, host.ip4) + self.assertEqual(tcp.sport, server_out_port) + self.assertEqual(tcp.dport, host_in_port) + self.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] + local_host = self.pg9.remote_hosts[1] + external_port = 0 + + 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.pg9.sw_if_index, + is_add=1) + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg9.sw_if_index, + flags=flags, is_add=1) + + # in2out + p = (Ether(src=self.pg9.remote_mac, dst=self.pg9.local_mac) / + IP(src=local_host.ip4, dst=remote_host.ip4) / + TCP(sport=12345, dport=80)) + 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.assertNotEqual(tcp.sport, 12345) + external_port = tcp.sport + self.assertEqual(tcp.dport, 80) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + # out2in + p = (Ether(src=self.pg9.remote_mac, dst=self.pg9.local_mac) / + IP(src=remote_host.ip4, dst=self.nat_addr) / + TCP(sport=80, 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.src, remote_host.ip4) + self.assertEqual(ip.dst, local_host.ip4) + self.assertEqual(tcp.sport, 80) + self.assertEqual(tcp.dport, 12345) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + err = self.statistics.get_err_counter( + '/err/nat44-classify/next in2out') + self.assertEqual(err, 1) + err = self.statistics.get_err_counter( + '/err/nat44-classify/next out2in') + self.assertEqual(err, 1) + + def test_del_session(self): + """ Delete NAT44 session """ + 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) + + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(len(pkts)) + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + nsessions = len(sessions) + + 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.vapi.nat44_del_session(address=sessions[1].outside_ip_address, + port=sessions[1].outside_port, + protocol=sessions[1].protocol) + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, 0) + self.assertEqual(nsessions - len(sessions), 2) + + 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.verify_no_nat44_user() + + 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) + self.frag_in_order(proto=IP_PROTOS.udp) + self.frag_in_order(proto=IP_PROTOS.icmp) + + def test_frag_forwarding(self): + """ NAT44 forwarding fragment test """ + self.vapi.nat44_add_del_interface_addr( + is_add=1, + sw_if_index=self.pg1.sw_if_index) + 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) + + data = b"A" * 16 + b"B" * 16 + b"C" * 3 + pkts = self.create_stream_frag(self.pg1, + self.pg0.remote_ip4, + 4789, + 4789, + data, + proto=IP_PROTOS.udp) + 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) + self.assertEqual(p[UDP].sport, 4789) + self.assertEqual(p[UDP].dport, 4789) + self.assertEqual(data, p[Raw].load) + + 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) + self.reass_hairpinning(proto=IP_PROTOS.udp) + self.reass_hairpinning(proto=IP_PROTOS.icmp) + + 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) + self.frag_out_of_order(proto=IP_PROTOS.udp) + self.frag_out_of_order(proto=IP_PROTOS.icmp) + + def test_port_restricted(self): + """ Port restricted NAT44 (MAP-E CE) """ + 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_addr_and_port_alloc_alg(alg=1, + psid_offset=6, + psid_length=6, + psid=10) + + 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=4567, dport=22)) + 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.dst, self.pg1.remote_ip4) + self.assertEqual(ip.src, self.nat_addr) + self.assertEqual(tcp.dport, 22) + self.assertNotEqual(tcp.sport, 4567) + self.assertEqual((tcp.sport >> 6) & 63, 10) + self.assert_packet_checksums_valid(p) + except: + self.logger.error(ppp("Unexpected or invalid packet:", p)) + raise + + def test_port_range(self): + """ 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( + 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_addr_and_port_alloc_alg(alg=2, + start_port=1025, + end_port=1027) + + pkts = [] + for port in range(0, 5): + 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=1125 + port)) + pkts.append(p) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(3) + for p in capture: + tcp = p[TCP] + self.assertGreaterEqual(tcp.sport, 1025) + self.assertLessEqual(tcp.sport, 1027) + + def test_multiple_outside_vrf(self): + """ Multiple outside VRF """ + vrf_id1 = 1 + vrf_id2 = 2 + + self.pg1.unconfig_ip4() + self.pg2.unconfig_ip4() + self.vapi.ip_table_add_del(is_add=1, table={'table_id': vrf_id1}) + self.vapi.ip_table_add_del(is_add=1, table={'table_id': vrf_id2}) + self.pg1.set_table_ip4(vrf_id1) + self.pg2.set_table_ip4(vrf_id2) + self.pg1.config_ip4() + self.pg2.config_ip4() + self.pg1.resolve_arp() + self.pg2.resolve_arp() + + 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.nat44_interface_add_del_feature( + sw_if_index=self.pg2.sw_if_index, + is_add=1) + + try: + # first VRF + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture, self.nat_addr) + + pkts = self.create_stream_out(self.pg1, self.nat_addr) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg0.get_capture(len(pkts)) + self.verify_capture_in(capture, self.pg0) + + self.tcp_port_in = 60303 + self.udp_port_in = 60304 + self.icmp_id_in = 60305 + + # second VRF + pkts = self.create_stream_in(self.pg0, self.pg2) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg2.get_capture(len(pkts)) + self.verify_capture_out(capture, self.nat_addr) + + pkts = self.create_stream_out(self.pg2, self.nat_addr) + self.pg2.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) + + finally: + self.nat44_add_address(self.nat_addr, is_add=0) + self.pg1.unconfig_ip4() + self.pg2.unconfig_ip4() + self.pg1.set_table_ip4(0) + self.pg2.set_table_ip4(0) + self.pg1.config_ip4() + self.pg2.config_ip4() + self.pg1.resolve_arp() + self.pg2.resolve_arp() + + @unittest.skipUnless(running_extended_tests, "part of extended tests") + def test_session_timeout(self): + """ NAT44 session 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=5, tcp_established=7440, + tcp_transitory=240, icmp=60) + + max_sessions = 1000 + pkts = [] + for i in range(0, max_sessions): + src = "10.10.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=src, dst=self.pg1.remote_ip4) / + UDP(sport=1025, dport=53)) + pkts.append(p) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(max_sessions) + + sleep(6) + + pkts = [] + for i in range(0, max_sessions): + src = "10.10.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=src, dst=self.pg1.remote_ip4) / + UDP(sport=1026, dport=53)) + pkts.append(p) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg1.get_capture(max_sessions) + + nsessions = 0 + users = self.vapi.nat44_user_dump() + for user in users: + nsessions = nsessions + user.nsessions + self.assertLess(nsessions, 2 * max_sessions) + + def test_mss_clamping(self): + """ TCP MSS clamping """ + 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(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="S", options=[('MSS', 1400)])) + + self.vapi.nat_set_mss_clamping(enable=1, mss_value=1000) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(1) + # Negotiated MSS value greater than configured - changed + self.verify_mss_value(capture[0], 1000) + + self.vapi.nat_set_mss_clamping(enable=0, mss_value=1500) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(1) + # MSS clamping disabled - negotiated MSS unchanged + self.verify_mss_value(capture[0], 1400) + + self.vapi.nat_set_mss_clamping(enable=1, mss_value=1500) + self.pg0.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(1) + # Negotiated MSS value smaller than configured - unchanged + self.verify_mss_value(capture[0], 1400) + + @unittest.skipUnless(running_extended_tests, "part of extended tests") + def test_ha_send(self): + """ Send HA session synchronization events (active) """ + 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_ha_set_listener(ip_address=self.pg3.local_ip4, + port=12345, + path_mtu=512) + self.vapi.nat_ha_set_failover(ip_address=self.pg3.remote_ip4, + port=12346, session_refresh_interval=10) + bind_layers(UDP, HANATStateSync, sport=12345) + + # create sessions + pkts = self.create_stream_in(self.pg0, self.pg1) + self.pg0.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + capture = self.pg1.get_capture(len(pkts)) + self.verify_capture_out(capture) + # active send HA events + self.vapi.nat_ha_flush() + stats = self.statistics.get_counter('/nat44/ha/add-event-send') + self.assertEqual(stats[0][0], 3) + capture = self.pg3.get_capture(1) + p = capture[0] + self.assert_packet_checksums_valid(p) + try: + ip = p[IP] + udp = p[UDP] + hanat = p[HANATStateSync] + except IndexError: + self.logger.error(ppp("Invalid packet:", p)) + raise + else: + self.assertEqual(ip.src, self.pg3.local_ip4) + self.assertEqual(ip.dst, self.pg3.remote_ip4) + self.assertEqual(udp.sport, 12345) + self.assertEqual(udp.dport, 12346) + self.assertEqual(hanat.version, 1) + self.assertEqual(hanat.thread_index, 0) + self.assertEqual(hanat.count, 3) + seq = hanat.sequence_number + for event in hanat.events: + self.assertEqual(event.event_type, 1) + self.assertEqual(event.in_addr, self.pg0.remote_ip4) + self.assertEqual(event.out_addr, self.nat_addr) + self.assertEqual(event.fib_index, 0) + + # ACK received events + ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / + IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / + UDP(sport=12346, dport=12345) / + HANATStateSync(sequence_number=seq, flags='ACK')) + self.pg3.add_stream(ack) + self.pg_start() + stats = self.statistics.get_counter('/nat44/ha/ack-recv') + self.assertEqual(stats[0][0], 1) + + # delete one session + self.pg_enable_capture(self.pg_interfaces) + self.vapi.nat44_del_session(address=self.pg0.remote_ip4, + port=self.tcp_port_in, + protocol=IP_PROTOS.tcp, + flags=self.config_flags.NAT_IS_INSIDE) + self.vapi.nat_ha_flush() + stats = self.statistics.get_counter('/nat44/ha/del-event-send') + self.assertEqual(stats[0][0], 1) + capture = self.pg3.get_capture(1) + p = capture[0] + try: + hanat = p[HANATStateSync] + except IndexError: + self.logger.error(ppp("Invalid packet:", p)) + raise + else: + self.assertGreater(hanat.sequence_number, seq) + + # do not send ACK, active retry send HA event again + self.pg_enable_capture(self.pg_interfaces) + sleep(12) + stats = self.statistics.get_counter('/nat44/ha/retry-count') + self.assertEqual(stats[0][0], 3) + stats = self.statistics.get_counter('/nat44/ha/missed-count') + self.assertEqual(stats[0][0], 1) + capture = self.pg3.get_capture(3) + for packet in capture: + self.assertEqual(packet, p) + + # session counters refresh + pkts = self.create_stream_out(self.pg1) + self.pg1.add_stream(pkts) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + self.pg0.get_capture(2) + self.vapi.nat_ha_flush() + stats = self.statistics.get_counter('/nat44/ha/refresh-event-send') + self.assertEqual(stats[0][0], 2) + capture = self.pg3.get_capture(1) + p = capture[0] + self.assert_packet_checksums_valid(p) + try: + ip = p[IP] + udp = p[UDP] + hanat = p[HANATStateSync] + except IndexError: + self.logger.error(ppp("Invalid packet:", p)) + raise + else: + self.assertEqual(ip.src, self.pg3.local_ip4) + self.assertEqual(ip.dst, self.pg3.remote_ip4) + self.assertEqual(udp.sport, 12345) + self.assertEqual(udp.dport, 12346) + self.assertEqual(hanat.version, 1) + self.assertEqual(hanat.count, 2) + seq = hanat.sequence_number + for event in hanat.events: + self.assertEqual(event.event_type, 3) + self.assertEqual(event.out_addr, self.nat_addr) + self.assertEqual(event.fib_index, 0) + self.assertEqual(event.total_pkts, 2) + self.assertGreater(event.total_bytes, 0) + + ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / + IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / + UDP(sport=12346, dport=12345) / + HANATStateSync(sequence_number=seq, flags='ACK')) + self.pg3.add_stream(ack) + self.pg_start() + stats = self.statistics.get_counter('/nat44/ha/ack-recv') + self.assertEqual(stats[0][0], 2) + + def test_ha_recv(self): + """ 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( + 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_ha_set_listener(ip_address=self.pg3.local_ip4, + port=12345, + path_mtu=512) + bind_layers(UDP, HANATStateSync, sport=12345) + + self.tcp_port_out = random.randint(1025, 65535) + self.udp_port_out = random.randint(1025, 65535) + + # send HA session add events to failover/passive + p = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / + IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / + UDP(sport=12346, dport=12345) / + HANATStateSync(sequence_number=1, events=[ + Event(event_type='add', protocol='tcp', + in_addr=self.pg0.remote_ip4, out_addr=self.nat_addr, + in_port=self.tcp_port_in, out_port=self.tcp_port_out, + eh_addr=self.pg1.remote_ip4, + ehn_addr=self.pg1.remote_ip4, + eh_port=self.tcp_external_port, + ehn_port=self.tcp_external_port, fib_index=0), + Event(event_type='add', protocol='udp', + in_addr=self.pg0.remote_ip4, out_addr=self.nat_addr, + in_port=self.udp_port_in, out_port=self.udp_port_out, + eh_addr=self.pg1.remote_ip4, + ehn_addr=self.pg1.remote_ip4, + eh_port=self.udp_external_port, + ehn_port=self.udp_external_port, fib_index=0)])) + + self.pg3.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + # receive ACK + capture = self.pg3.get_capture(1) + p = capture[0] + try: + hanat = p[HANATStateSync] + except IndexError: + self.logger.error(ppp("Invalid packet:", p)) + raise + else: + self.assertEqual(hanat.sequence_number, 1) + self.assertEqual(hanat.flags, 'ACK') + self.assertEqual(hanat.version, 1) + self.assertEqual(hanat.thread_index, 0) + stats = self.statistics.get_counter('/nat44/ha/ack-send') + self.assertEqual(stats[0][0], 1) + stats = self.statistics.get_counter('/nat44/ha/add-event-recv') + self.assertEqual(stats[0][0], 2) + users = self.statistics.get_counter('/nat44/total-users') + self.assertEqual(users[0][0], 1) + sessions = self.statistics.get_counter('/nat44/total-sessions') + self.assertEqual(sessions[0][0], 2) + users = self.vapi.nat44_user_dump() + self.assertEqual(len(users), 1) + self.assertEqual(str(users[0].ip_address), + self.pg0.remote_ip4) + # there should be 2 sessions created by HA + sessions = self.vapi.nat44_user_session_dump(users[0].ip_address, + users[0].vrf_id) + self.assertEqual(len(sessions), 2) + for session in sessions: + self.assertEqual(str(session.inside_ip_address), + self.pg0.remote_ip4) + self.assertEqual(str(session.outside_ip_address), + self.nat_addr) + self.assertIn(session.inside_port, + [self.tcp_port_in, self.udp_port_in]) + self.assertIn(session.outside_port, + [self.tcp_port_out, self.udp_port_out]) + self.assertIn(session.protocol, [IP_PROTOS.tcp, IP_PROTOS.udp]) + + # send HA session delete event to failover/passive + p = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / + IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / + UDP(sport=12346, dport=12345) / + HANATStateSync(sequence_number=2, events=[ + Event(event_type='del', protocol='udp', + in_addr=self.pg0.remote_ip4, out_addr=self.nat_addr, + in_port=self.udp_port_in, out_port=self.udp_port_out, + eh_addr=self.pg1.remote_ip4, + ehn_addr=self.pg1.remote_ip4, + eh_port=self.udp_external_port, + ehn_port=self.udp_external_port, fib_index=0)])) + + self.pg3.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + # receive ACK + capture = self.pg3.get_capture(1) + p = capture[0] + try: + hanat = p[HANATStateSync] + except IndexError: + self.logger.error(ppp("Invalid packet:", p)) + raise + else: + self.assertEqual(hanat.sequence_number, 2) + self.assertEqual(hanat.flags, 'ACK') + self.assertEqual(hanat.version, 1) + users = self.vapi.nat44_user_dump() + self.assertEqual(len(users), 1) + self.assertEqual(str(users[0].ip_address), + self.pg0.remote_ip4) + # now we should have only 1 session, 1 deleted by HA + sessions = self.vapi.nat44_user_session_dump(users[0].ip_address, + users[0].vrf_id) + self.assertEqual(len(sessions), 1) + stats = self.statistics.get_counter('/nat44/ha/del-event-recv') + self.assertEqual(stats[0][0], 1) + + stats = self.statistics.get_err_counter('/err/nat-ha/pkts-processed') + self.assertEqual(stats, 2) + + # send HA session refresh event to failover/passive + p = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / + IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / + UDP(sport=12346, dport=12345) / + HANATStateSync(sequence_number=3, events=[ + Event(event_type='refresh', protocol='tcp', + in_addr=self.pg0.remote_ip4, out_addr=self.nat_addr, + in_port=self.tcp_port_in, out_port=self.tcp_port_out, + eh_addr=self.pg1.remote_ip4, + ehn_addr=self.pg1.remote_ip4, + eh_port=self.tcp_external_port, + ehn_port=self.tcp_external_port, fib_index=0, + total_bytes=1024, total_pkts=2)])) + self.pg3.add_stream(p) + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + # receive ACK + capture = self.pg3.get_capture(1) + p = capture[0] + try: + hanat = p[HANATStateSync] + except IndexError: + self.logger.error(ppp("Invalid packet:", p)) + raise + else: + self.assertEqual(hanat.sequence_number, 3) + self.assertEqual(hanat.flags, 'ACK') + self.assertEqual(hanat.version, 1) + users = self.vapi.nat44_user_dump() + self.assertEqual(len(users), 1) + self.assertEqual(str(users[0].ip_address), + self.pg0.remote_ip4) + sessions = self.vapi.nat44_user_session_dump(users[0].ip_address, + users[0].vrf_id) + self.assertEqual(len(sessions), 1) + session = sessions[0] + self.assertEqual(session.total_bytes, 1024) + self.assertEqual(session.total_pkts, 2) + stats = self.statistics.get_counter('/nat44/ha/refresh-event-recv') + self.assertEqual(stats[0][0], 1) + + stats = self.statistics.get_err_counter('/err/nat-ha/pkts-processed') + self.assertEqual(stats, 3) + + # send packet to test session created by HA + p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / + IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / + TCP(sport=self.tcp_external_port, dport=self.tcp_port_out)) + 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] + except IndexError: + self.logger.error(ppp("Invalid packet:", p)) + raise + else: + self.assertEqual(ip.src, self.pg1.remote_ip4) + self.assertEqual(ip.dst, self.pg0.remote_ip4) + self.assertEqual(tcp.sport, self.tcp_external_port) + self.assertEqual(tcp.dport, self.tcp_port_in) + + def show_commands_at_teardown(self): + 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("show nat addr-port-assignment-alg")) + 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) + + @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 = 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}] + + 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) + 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) + + 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 """ + 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) + + sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4, + 0) + self.assertEqual(len(sessions) - start_sessnum, 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 + + @unittest.skipUnless(running_extended_tests, "part of extended tests") + def test_session_timeout(self): + """ NAT44 session 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=240, icmp=5) + + max_sessions = 1000 + pkts = [] + for i in range(0, max_sessions): + src = "10.10.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=src, dst=self.pg1.remote_ip4) / + ICMP(id=1025, 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(max_sessions) + + sleep(10) + + pkts = [] + for i in range(0, max_sessions): + src = "10.11.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF) + p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / + IP(src=src, dst=self.pg1.remote_ip4) / + ICMP(id=1026, 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(max_sessions) + + nsessions = 0 + users = self.vapi.nat44_user_dump() + for user in users: + nsessions = nsessions + user.nsessions + self.assertLess(nsessions, 2 * max_sessions) + + @unittest.skipUnless(running_extended_tests, "part of extended tests") + 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 """ + + @classmethod + def setUpClass(cls): + super(TestNAT44Out2InDPO, 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.dst_ip4 = '192.168.70.1' + + cls.create_pg_interfaces(range(2)) + + cls.pg0.admin_up() + cls.pg0.config_ip4() + cls.pg0.resolve_arp() + + cls.pg1.admin_up() + cls.pg1.config_ip6() + cls.pg1.resolve_ndp() + + r1 = VppIpRoute(cls, "::", 0, + [VppRoutePath(cls.pg1.remote_ip6, + cls.pg1.sw_if_index)], + 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 + self.vapi.nat44_plugin_enable_disable(enable=1, flags=flags) + + def tearDown(self): + super(TestNAT44Out2InDPO, self).tearDown() + if not self.vpp_dead: + self.vapi.nat44_plugin_enable_disable(enable=0) + self.vapi.cli("clear logging") + + def configure_xlat(self): + self.dst_ip6_pfx = '1:2:3::' + self.dst_ip6_pfx_n = socket.inet_pton(socket.AF_INET6, + self.dst_ip6_pfx) + self.dst_ip6_pfx_len = 96 + self.src_ip6_pfx = '4:5:6::' + self.src_ip6_pfx_n = socket.inet_pton(socket.AF_INET6, + self.src_ip6_pfx) + self.src_ip6_pfx_len = 96 + self.vapi.map_add_domain(self.dst_ip6_pfx_n, self.dst_ip6_pfx_len, + self.src_ip6_pfx_n, self.src_ip6_pfx_len, + '\x00\x00\x00\x00', 0) + + @unittest.skip('Temporary disabled') + def test_464xlat_ce(self): + """ Test 464XLAT CE with NAT44 """ + + nat_config = self.vapi.nat_show_config() + self.assertEqual(1, nat_config.out2in_dpo) + + self.configure_xlat() + + 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_add_del_address_range(first_ip_address=self.nat_addr_n, + last_ip_address=self.nat_addr_n, + vrf_id=0xFFFFFFFF, is_add=1) + + out_src_ip6 = self.compose_ip6(self.dst_ip4, self.dst_ip6_pfx, + self.dst_ip6_pfx_len) + out_dst_ip6 = self.compose_ip6(self.nat_addr, self.src_ip6_pfx, + self.src_ip6_pfx_len) + + try: + pkts = self.create_stream_in(self.pg0, self.pg1, self.dst_ip4) + 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_ip6(capture, nat_ip=out_dst_ip6, + dst_ip=out_src_ip6) + + pkts = self.create_stream_out_ip6(self.pg1, out_src_ip6, + out_dst_ip6) + 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) + finally: + self.vapi.nat44_interface_add_del_feature( + sw_if_index=self.pg0.sw_if_index, + flags=flags) + self.vapi.nat44_add_del_address_range( + first_ip_address=self.nat_addr_n, + last_ip_address=self.nat_addr_n, + vrf_id=0xFFFFFFFF) + + @unittest.skip('Temporary disabled') + def test_464xlat_ce_no_nat(self): + """ Test 464XLAT CE without NAT44 """ + + self.configure_xlat() + + out_src_ip6 = self.compose_ip6(self.dst_ip4, self.dst_ip6_pfx, + self.dst_ip6_pfx_len) + out_dst_ip6 = self.compose_ip6(self.pg0.remote_ip4, self.src_ip6_pfx, + self.src_ip6_pfx_len) + + pkts = self.create_stream_in(self.pg0, self.pg1, self.dst_ip4) + 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_ip6(capture, dst_ip=out_src_ip6, + nat_ip=out_dst_ip6, same_port=True) + + pkts = self.create_stream_out_ip6(self.pg1, out_src_ip6, out_dst_ip6) + 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 __name__ == '__main__': + unittest.main(testRunner=VppTestRunner) |