#!/usr/bin/env python3 import ipaddress import random import socket import struct import unittest from io import BytesIO import scapy.compat from framework import VppTestCase, VppTestRunner from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder from scapy.all import bind_layers, Packet, ByteEnumField, ShortField, \ IPField, IntField, LongField, XByteField, FlagsField, FieldLenField, \ 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 IPv6, ICMPv6EchoRequest, ICMPv6EchoReply from scapy.layers.l2 import Ether, ARP, GRE from scapy.packet import Raw from syslog_rfc5424_parser import SyslogMessage, ParseError from syslog_rfc5424_parser.constants import SyslogSeverity from util import ppp 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_nat44_ei_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 NAT44EI 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.NAT44_EI_ADDR_ONLY_MAPPING self.vapi.nat44_ei_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): """ Add/delete NAT44EI address :param ip: IP address :param is_add: 1 if add, 0 if delete (Default add) """ self.vapi.nat44_ei_add_del_address_range(first_ip_address=ip, last_ip_address=ip, vrf_id=vrf_id, is_add=is_add) def create_routes_and_neigbors(self): r1 = VppIpRoute(self, self.pg7.remote_ip4, 32, [VppRoutePath(self.pg7.remote_ip4, self.pg7.sw_if_index)]) r2 = VppIpRoute(self, self.pg8.remote_ip4, 32, [VppRoutePath(self.pg8.remote_ip4, self.pg8.sw_if_index)]) r1.add_vpp_config() r2.add_vpp_config() n1 = VppNeighbor(self, self.pg7.sw_if_index, self.pg7.remote_mac, self.pg7.remote_ip4, is_static=1) n2 = VppNeighbor(self, self.pg8.sw_if_index, self.pg8.remote_mac, self.pg8.remote_ip4, is_static=1) n1.add_vpp_config() n2.add_vpp_config() def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64): """ Create packet stream for inside network :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 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_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 verify_ipfix_nat44_ses(self, data): """ Verify IPFIX NAT44EI 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(f"Invalid protocol {scapy.compat.orb(record[4])}") self.assertEqual(3, nat44_ses_create_num) self.assertEqual(3, nat44_ses_delete_num) def verify_ipfix_addr_exhausted(self, data): 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): 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_no_nat44_user(self): """ Verify that there is no NAT44EI user """ users = self.vapi.nat44_ei_user_dump() self.assertEqual(len(users), 0) users = self.statistics['/nat44-ei/total-users'] self.assertEqual(users[0][0], 0) sessions = self.statistics['/nat44-ei/total-sessions'] self.assertEqual(sessions[0][0], 0) 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_mss_value(self, pkt, 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 reass_hairpinning(self, server_addr, server_in_port, server_out_port, host_in_port, proto=IP_PROTOS.tcp, ignore_port=False): layer = self.proto2layer(proto) if proto == IP_PROTOS.tcp: data = b"A" * 4 + b"B" * 16 + b"C" * 3 else: data = b"A" * 16 + b"B" * 16 + b"C" * 3 # send packet from host to server pkts = self.create_stream_frag(self.pg0, self.nat_addr, host_in_port, server_out_port, data, proto) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() frags = self.pg0.get_capture(len(pkts)) p = self.reass_frags_and_verify(frags, self.nat_addr, server_addr) if proto != IP_PROTOS.icmp: if not ignore_port: self.assertNotEqual(p[layer].sport, host_in_port) se 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 get_nat44_ei_in2out_worker_index(ip, vpp_worker_count): if 0 == vpp_worker_count: return 0 numeric = socket.inet_aton(ip) numeric = struct.unpack("!L", numeric)[0] numeric = socket.htonl(numeric) h = numeric + (numeric >> 8) + (numeric >> 16) + (numeric >> 24) return 1 + h % vpp_worker_count class TestNAT44EI(MethodHolder): """ NAT44EI Test Cases """ max_translations = 10240 max_users = 10240 @classmethod def setUpClass(cls): super(TestNAT44EI, cls).setUpClass() cls.vapi.cli("set log class nat44-ei 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 plugin_enable(self): self.vapi.nat44_ei_plugin_enable_disable( sessions=self.max_translations, users=self.max_users, enable=1) def setUp(self): super(TestNAT44EI, self).setUp() self.plugin_enable() def tearDown(self): super(TestNAT44EI, self).tearDown() if not self.vpp_dead: self.vapi.nat44_ei_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_ei_plugin_enable_disable(enable=0) self.vapi.cli("clear logging") def test_clear_sessions(self): """ NAT44EI session clearing test """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_out(capture) sessions = self.statistics['/nat44-ei/total-sessions'] self.assertGreater(sessions[:, 0].sum(), 0, "Session count invalid") self.logger.info("sessions before clearing: %s" % sessions[0][0]) self.vapi.cli("clear nat44 ei sessions") sessions = self.statistics['/nat44-ei/total-sessions'] self.assertEqual(sessions[:, 0].sum(), 0, "Session count invalid") self.logger.info("sessions after clearing: %s" % sessions[0][0]) def test_dynamic(self): """ NAT44EI dynamic translation test """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) # in2out tcpn = self.statistics['/nat44-ei/in2out/slowpath/tcp'] udpn = self.statistics['/nat44-ei/in2out/slowpath/udp'] icmpn = self.statistics['/nat44-ei/in2out/slowpath/icmp'] drops = self.statistics['/nat44-ei/in2out/slowpath/drops'] 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['/nat44-ei/in2out/slowpath/tcp'] self.assertEqual(cnt[:, if_idx].sum() - tcpn[:, if_idx].sum(), 2) cnt = self.statistics['/nat44-ei/in2out/slowpath/udp'] self.assertEqual(cnt[:, if_idx].sum() - udpn[:, if_idx].sum(), 1) cnt = self.statistics['/nat44-ei/in2out/slowpath/icmp'] self.assertEqual(cnt[:, if_idx].sum() - icmpn[:, if_idx].sum(), 1) cnt = self.statistics['/nat44-ei/in2out/slowpath/drops'] self.assertEqual(cnt[:, if_idx].sum() - drops[:, if_idx].sum(), 0) # out2in tcpn = self.statistics['/nat44-ei/out2in/slowpath/tcp'] udpn = self.statistics['/nat44-ei/out2in/slowpath/udp'] icmpn = self.statistics['/nat44-ei/out2in/slowpath/icmp'] drops = self.statistics['/nat44-ei/out2in/slowpath/drops'] pkts = self.create_stream_out(self.pg1) self.pg1.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg0.get_capture(len(pkts)) self.verify_capture_in(capture, self.pg0) if_idx = self.pg1.sw_if_index cnt = self.statistics['/nat44-ei/out2in/slowpath/tcp'] self.assertEqual(cnt[:, if_idx].sum() - tcpn[:, if_idx].sum(), 2) cnt = self.statistics['/nat44-ei/out2in/slowpath/udp'] self.assertEqual(cnt[:, if_idx].sum() - udpn[:, if_idx].sum(), 1) cnt = self.statistics['/nat44-ei/out2in/slowpath/icmp'] self.assertEqual(cnt[:, if_idx].sum() - icmpn[:, if_idx].sum(), 1) cnt = self.statistics['/nat44-ei/out2in/slowpath/drops'] self.assertEqual(cnt[:, if_idx].sum() - drops[:, if_idx].sum(), 0) users = self.statistics['/nat44-ei/total-users'] self.assertEqual(users[:, 0].sum(), 1) sessions = self.statistics['/nat44-ei/total-sessions'] self.assertEqual(sessions[:, 0].sum(), 3) def test_dynamic_icmp_errors_in2out_ttl_1(self): """ NAT44EI handling of client packets with TTL=1 """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI handling of server packets with TTL=1 """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI handling of error responses to client packets with TTL=2 """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI handling of error responses to server packets with TTL=2 """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI ping out interface from outside network """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI ping internal host from outside network """ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI forwarding test """ flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) self.vapi.nat44_ei_forwarding_enable_disable(enable=1) real_ip = self.pg0.remote_ip4 alias_ip = self.nat_addr flags = self.config_flags.NAT44_EI_ADDR_ONLY_MAPPING self.vapi.nat44_ei_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_ei_forwarding_enable_disable(enable=0) flags = self.config_flags.NAT44_EI_ADDR_ONLY_MAPPING self.vapi.nat44_ei_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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) sm = self.vapi.nat44_ei_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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) sm = self.vapi.nat44_ei_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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg3.sw_if_index, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg4.sw_if_index, flags=flags, is_add=1) # inside interface VRF match NAT44EI static mapping VRF pkts = self.create_stream_in(self.pg4, self.pg3) self.pg4.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg3.get_capture(len(pkts)) self.verify_capture_out(capture, nat_ip1, True) # inside interface VRF don't match NAT44EI static mapping VRF (packets # are dropped) pkts = self.create_stream_in(self.pg0, self.pg3) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() self.pg3.assert_nothing_captured() def test_dynamic_to_static(self): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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_ei_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): """ NAT44EI Identity NAT """ flags = self.config_flags.NAT44_EI_ADDR_ONLY_MAPPING self.vapi.nat44_ei_add_del_identity_mapping( ip_address=self.pg0.remote_ip4, sw_if_index=0xFFFFFFFF, flags=flags, is_add=1) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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_ei_user_session_dump(self.pg0.remote_ip4, 0) self.assertEqual(len(sessions), 0) flags = self.config_flags.NAT44_EI_ADDR_ONLY_MAPPING self.vapi.nat44_ei_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_ei_identity_mapping_dump() self.assertEqual(len(identity_mappings), 2) def test_multiple_inside_interfaces(self): """ NAT44EI multiple non-overlapping address space inside interfaces """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg3.sw_if_index, is_add=1) # between two NAT44EI inside interfaces (no translation) pkts = self.create_stream_in(self.pg0, self.pg1) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(pkts)) self.verify_capture_no_translation(capture, self.pg0, self.pg1) # from inside to interface without translation pkts = self.create_stream_in(self.pg0, self.pg2) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) 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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg3.sw_if_index, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg4.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg5.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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 NAT44EI inside interfaces with same VRF (no translation) pkts = self.create_stream_in(self.pg4, self.pg5) self.pg4.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg5.get_capture(len(pkts)) self.verify_capture_no_translation(capture, self.pg4, self.pg5) # between NAT44EI inside interfaces with different VRF (hairpinning) p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / IP(src=self.pg4.remote_ip4, dst=static_nat_ip) / TCP(sport=1234, dport=5678)) 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_ei_address_dump() self.assertEqual(len(addresses), 1) sessions = self.vapi.nat44_ei_user_session_dump( self.pg5.remote_ip4, 10) self.assertEqual(len(sessions), 3) for session in sessions: self.assertFalse(session.flags & self.config_flags.NAT44_EI_STATIC_MAPPING) 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_ei_user_dump() self.assertGreaterEqual(len(users), 3) addresses = self.vapi.nat44_ei_address_dump() self.assertEqual(len(addresses), 1) for user in users: sessions = self.vapi.nat44_ei_user_session_dump(user.ip_address, user.vrf_id) for session in sessions: self.assertEqual(user.ip_address, session.inside_ip_address) self.assertTrue(session.total_bytes > session.total_pkts > 0) self.assertTrue(session.protocol in [IP_PROTOS.tcp, IP_PROTOS.udp, IP_PROTOS.icmp]) # pg4 session dump sessions = self.vapi.nat44_ei_user_session_dump( self.pg4.remote_ip4, 10) self.assertGreaterEqual(len(sessions), 4) for session in sessions: self.assertFalse( session.flags & self.config_flags.NAT44_EI_STATIC_MAPPING) 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_ei_user_session_dump( self.pg6.remote_ip4, 20) self.assertGreaterEqual(len(sessions), 3) for session in sessions: self.assertTrue( session.flags & self.config_flags.NAT44_EI_STATIC_MAPPING) 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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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['/nat44-ei/hairpinning'] # 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['/nat44-ei/hairpinning'] if_idx = self.pg0.sw_if_index self.assertEqual(after[:, if_idx].sum() - cnt[:, if_idx].sum(), 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['/nat44-ei/hairpinning'] if_idx = self.pg0.sw_if_index self.assertEqual(after[:, if_idx].sum() - cnt[:, if_idx].sum(), 2+(1 if self.vpp_worker_count > 0 else 0)) def test_hairpinning2(self): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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_hairpinning_avoid_inf_loop(self): """ NAT44EI hairpinning - 1:1 NAPT avoid infinite loop """ 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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) # add another static mapping that maps pg0.local_ip4 address to itself self.nat44_add_static_mapping(self.pg0.local_ip4, self.pg0.local_ip4) # send packet from host to VPP (the packet should get dropped) p = (Ether(src=host.mac, dst=self.pg0.local_mac) / IP(src=host.ip4, dst=self.pg0.local_ip4) / TCP(sport=host_in_port, dport=server_out_port)) self.pg0.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Here VPP used to crash due to an infinite loop cnt = self.statistics['/nat44-ei/hairpinning'] # 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['/nat44-ei/hairpinning'] if_idx = self.pg0.sw_if_index self.assertEqual(after[:, if_idx].sum() - cnt[:, if_idx].sum(), 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['/nat44-ei/hairpinning'] if_idx = self.pg0.sw_if_index self.assertEqual(after[:, if_idx].sum() - cnt[:, if_idx].sum(), 2+(1 if self.vpp_worker_count > 0 else 0)) def test_interface_addr(self): """ NAT44EI acquire addresses from interface """ self.vapi.nat44_ei_add_del_interface_addr( is_add=1, sw_if_index=self.pg7.sw_if_index) # no address in NAT pool addresses = self.vapi.nat44_ei_address_dump() self.assertEqual(0, len(addresses)) # configure interface address and check NAT address pool self.pg7.config_ip4() addresses = self.vapi.nat44_ei_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_ei_address_dump() self.assertEqual(0, len(addresses)) def test_interface_addr_static_mapping(self): """ NAT44EI Static mapping with addresses from interface """ tag = "testTAG" self.vapi.nat44_ei_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_ei_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_ei_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_ei_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_ei_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_ei_static_mapping_dump() self.assertEqual(0, len(static_mappings)) def test_interface_addr_identity_nat(self): """ NAT44EI Identity NAT with addresses from interface """ port = 53053 self.vapi.nat44_ei_add_del_interface_addr( is_add=1, sw_if_index=self.pg7.sw_if_index) self.vapi.nat44_ei_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_ei_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_ei_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_ei_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): """ NAT44EI IPFIX logging NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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.nat44_ei_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): """ NAT44EI IPFIX logging NAT addresses exhausted """ flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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.nat44_ei_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() 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) def test_ipfix_max_sessions(self): """ NAT44EI IPFIX logging maximum session entries exceeded """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) max_sessions_per_thread = self.max_translations max_sessions = max(1, self.vpp_worker_count) * max_sessions_per_thread 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.nat44_ei_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() 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_per_thread) def test_syslog_apmap(self): """ NAT44EI syslog address and port mapping creation and deletion """ self.vapi.syslog_set_filter( self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_INFO) self.vapi.syslog_set_sender(self.pg3.local_ip4, self.pg3.remote_ip4) self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI add pool addresses to FIB """ static_addr = '10.0.0.10' self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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) # NAT44EI address p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / ARP(op=ARP.who_has, pdst=self.nat_addr, psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) 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-NAT44EI interface p = (Ether(src=self.pg2.remote_mac, dst='ff:ff:ff:ff:ff:ff') / ARP(op=ARP.who_has, pdst=self.nat_addr, psrc=self.pg2.remote_ip4, hwsrc=self.pg2.remote_mac)) 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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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 test_dynamic_ipless_interfaces(self): """ NAT44EI interfaces without configured IP address """ self.create_routes_and_neigbors() self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg7.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI interfaces without configured IP address - 1:1 NAT """ self.create_routes_and_neigbors() self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg7.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg7.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI 1:1 translate packet with unknown protocol """ nat_ip = "10.0.0.10" self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI 1:1 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI output feature (in2out postrouting) """ self.nat44_add_address(self.nat_addr) self.vapi.nat44_ei_add_del_output_interface( sw_if_index=self.pg3.sw_if_index, is_add=1) # 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): """ NAT44EI 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) self.vapi.nat44_ei_add_del_output_interface( sw_if_index=self.pg3.sw_if_index, is_add=1) # 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): """ NAT44EI output feature hairpinning (in2out postrouting) """ host = self.pg0.remote_hosts[0] server = self.pg0.remote_hosts[1] host_in_port = 1234 host_out_port = 0 server_in_port = 5678 server_out_port = 8765 self.nat44_add_address(self.nat_addr) self.vapi.nat44_ei_add_del_output_interface( sw_if_index=self.pg0.sw_if_index, is_add=1) self.vapi.nat44_ei_add_del_output_interface( 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) # 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): """ NAT44EI One armed NAT """ 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg9.sw_if_index, is_add=1) self.vapi.nat44_ei_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 if self.vpp_worker_count > 1: node = "nat44-ei-handoff-classify" else: node = "nat44-ei-classify" err = self.statistics.get_err_counter('/err/%s/next in2out' % node) self.assertEqual(err, 1) err = self.statistics.get_err_counter('/err/%s/next out2in' % node) self.assertEqual(err, 1) def test_del_session(self): """ NAT44EI delete session """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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_ei_user_session_dump(self.pg0.remote_ip4, 0) nsessions = len(sessions) self.vapi.nat44_ei_del_session( address=sessions[0].inside_ip_address, port=sessions[0].inside_port, protocol=sessions[0].protocol, flags=self.config_flags.NAT44_EI_IF_INSIDE) self.vapi.nat44_ei_del_session( address=sessions[1].outside_ip_address, port=sessions[1].outside_port, protocol=sessions[1].protocol) sessions = self.vapi.nat44_ei_user_session_dump(self.pg0.remote_ip4, 0) self.assertEqual(nsessions - len(sessions), 2) self.vapi.nat44_ei_del_session( address=sessions[0].inside_ip_address, port=sessions[0].inside_port, protocol=sessions[0].protocol, flags=self.config_flags.NAT44_EI_IF_INSIDE) self.verify_no_nat44_user() def test_frag_in_order(self): """ NAT44EI translate fragments arriving in order """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI forwarding fragment test """ self.vapi.nat44_ei_add_del_interface_addr( is_add=1, sw_if_index=self.pg1.sw_if_index) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI fragments hairpinning """ server_addr = self.pg0.remote_hosts[1].ip4 host_in_port = random.randint(1025, 65535) server_in_port = random.randint(1025, 65535) server_out_port = random.randint(1025, 65535) self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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_addr, self.nat_addr, server_in_port, server_out_port, proto=IP_PROTOS.tcp) self.nat44_add_static_mapping(server_addr, self.nat_addr, server_in_port, server_out_port, proto=IP_PROTOS.udp) self.nat44_add_static_mapping(server_addr, self.nat_addr) self.reass_hairpinning(server_addr, server_in_port, server_out_port, host_in_port, proto=IP_PROTOS.tcp) self.reass_hairpinning(server_addr, server_in_port, server_out_port, host_in_port, proto=IP_PROTOS.udp) self.reass_hairpinning(server_addr, server_in_port, server_out_port, host_in_port, proto=IP_PROTOS.icmp) def test_frag_out_of_order(self): """ NAT44EI translate fragments arriving out of order """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI Port restricted NAT44EI (MAP-E CE) """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI External address port range """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) self.vapi.nat44_ei_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): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) self.vapi.nat44_ei_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() def test_mss_clamping(self): """ NAT44EI TCP MSS clamping """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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.nat44_ei_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.nat44_ei_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.nat44_ei_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) def test_ha_send(self): """ NAT44EI Send HA session synchronization events (active) """ flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) self.nat44_add_address(self.nat_addr) self.vapi.nat44_ei_ha_set_listener( ip_address=self.pg3.local_ip4, port=12345, path_mtu=512) self.vapi.nat44_ei_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.nat44_ei_ha_flush() stats = self.statistics['/nat44-ei/ha/add-event-send'] self.assertEqual(stats[:, 0].sum(), 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', thread_index=hanat.thread_index)) self.pg3.add_stream(ack) self.pg_start() stats = self.statistics['/nat44-ei/ha/ack-recv'] self.assertEqual(stats[:, 0].sum(), 1) # delete one session self.pg_enable_capture(self.pg_interfaces) self.vapi.nat44_ei_del_session( address=self.pg0.remote_ip4, port=self.tcp_port_in, protocol=IP_PROTOS.tcp, flags=self.config_flags.NAT44_EI_IF_INSIDE) self.vapi.nat44_ei_ha_flush() stats = self.statistics['/nat44-ei/ha/del-event-send'] self.assertEqual(stats[:, 0].sum(), 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) self.virtual_sleep(12) stats = self.statistics['/nat44-ei/ha/retry-count'] self.assertEqual(stats[:, 0].sum(), 3) stats = self.statistics['/nat44-ei/ha/missed-count'] self.assertEqual(stats[:, 0].sum(), 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.nat44_ei_ha_flush() stats = self.statistics['/nat44-ei/ha/refresh-event-send'] self.assertEqual(stats[:, 0].sum(), 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) stats = self.statistics['/nat44-ei/ha/ack-recv'] 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', thread_index=hanat.thread_index)) self.pg3.add_stream(ack) self.pg_start() stats = self.statistics['/nat44-ei/ha/ack-recv'] self.assertEqual(stats[:, 0].sum(), 2) def test_ha_recv(self): """ NAT44EI Receive HA session synchronization events (passive) """ self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) self.vapi.nat44_ei_ha_set_listener(ip_address=self.pg3.local_ip4, port=12345, path_mtu=512) bind_layers(UDP, HANATStateSync, sport=12345) # this is a bit tricky - HA dictates thread index due to how it's # designed, but once we use HA to create a session, we also want # to pass a packet through said session. so the session must end # up on the correct thread from both directions - in2out (based on # IP address) and out2in (based on outside port) # first choose a thread index which is correct for IP thread_index = get_nat44_ei_in2out_worker_index(self.pg0.remote_ip4, self.vpp_worker_count) # now pick a port which is correct for given thread port_per_thread = int((0xffff-1024) / max(1, self.vpp_worker_count)) self.tcp_port_out = 1024 + random.randint(1, port_per_thread) self.udp_port_out = 1024 + random.randint(1, port_per_thread) if self.vpp_worker_count > 0: self.tcp_port_out += port_per_thread * (thread_index - 1) self.udp_port_out += port_per_thread * (thread_index - 1) # 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)], thread_index=thread_index)) 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, thread_index) stats = self.statistics['/nat44-ei/ha/ack-send'] self.assertEqual(stats[:, 0].sum(), 1) stats = self.statistics['/nat44-ei/ha/add-event-recv'] self.assertEqual(stats[:, 0].sum(), 2) users = self.statistics['/nat44-ei/total-users'] self.assertEqual(users[:, 0].sum(), 1) sessions = self.statistics['/nat44-ei/total-sessions'] self.assertEqual(sessions[:, 0].sum(), 2) users = self.vapi.nat44_ei_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_ei_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)], thread_index=thread_index)) 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_ei_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_ei_user_session_dump(users[0].ip_address, users[0].vrf_id) self.assertEqual(len(sessions), 1) stats = self.statistics['/nat44-ei/ha/del-event-recv'] self.assertEqual(stats[:, 0].sum(), 1) stats = self.statistics.get_err_counter( '/err/nat44-ei-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)], thread_index=thread_index)) 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_ei_user_dump() self.assertEqual(len(users), 1) self.assertEqual(str(users[0].ip_address), self.pg0.remote_ip4) sessions = self.vapi.nat44_ei_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['/nat44-ei/ha/refresh-event-recv'] self.assertEqual(stats[:, 0].sum(), 1) stats = self.statistics.get_err_counter( '/err/nat44-ei-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 reconfigure_frame_queue_nelts(self, frame_queue_nelts): self.vapi.nat44_ei_plugin_enable_disable(enable=0) self.vapi.nat44_ei_set_fq_options(frame_queue_nelts=frame_queue_nelts) # keep plugin configuration persistent self.plugin_enable() return self.vapi.nat44_ei_show_fq_options().frame_queue_nelts def test_set_frame_queue_nelts(self): """ NAT44EI API test - worker handoff frame queue elements """ self.assertEqual(self.reconfigure_frame_queue_nelts(512), 512) def show_commands_at_teardown(self): self.logger.info(self.vapi.cli("show nat44 ei timeouts")) self.logger.info(self.vapi.cli("show nat44 ei addresses")) self.logger.info(self.vapi.cli("show nat44 ei interfaces")) self.logger.info(self.vapi.cli("show nat44 ei static mappings")) self.logger.info(self.vapi.cli("show nat44 ei interface address")) self.logger.info(self.vapi.cli("show nat44 ei sessions detail")) self.logger.info(self.vapi.cli("show nat44 ei hash tables detail")) self.logger.info(self.vapi.cli("show nat44 ei ha")) self.logger.info( self.vapi.cli("show nat44 ei addr-port-assignment-alg")) def test_outside_address_distribution(self): """ Outside address distribution based on source address """ x = 100 nat_addresses = [] for i in range(1, x): a = "10.0.0.%d" % i nat_addresses.append(a) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg1.sw_if_index, is_add=1) self.vapi.nat44_ei_add_del_address_range( first_ip_address=nat_addresses[0], last_ip_address=nat_addresses[-1], vrf_id=0xFFFFFFFF, is_add=1) self.pg0.generate_remote_hosts(x) pkts = [] for i in range(x): info = self.create_packet_info(self.pg0, self.pg1) payload = self.info_to_payload(info) p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_hosts[i].ip4, dst=self.pg1.remote_ip4) / UDP(sport=7000+i, dport=8000+i) / Raw(payload)) info.data = p pkts.append(p) self.pg0.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() recvd = self.pg1.get_capture(len(pkts)) for p_recvd in recvd: payload_info = self.payload_to_info(p_recvd[Raw]) packet_index = payload_info.index info = self._packet_infos[packet_index] self.assertTrue(info is not None) self.assertEqual(packet_index, info.index) p_sent = info.data packed = socket.inet_aton(p_sent[IP].src) numeric = struct.unpack("!L", packed)[0] numeric = socket.htonl(numeric) a = nat_addresses[(numeric-1) % len(nat_addresses)] self.assertEqual( a, p_recvd[IP].src, "Invalid packet (src IP %s translated to %s, but expected %s)" % (p_sent[IP].src, p_recvd[IP].src, a)) def test_default_user_sessions(self): """ NAT44EI default per-user session limit is used and reported """ nat44_ei_config = self.vapi.nat44_ei_show_running_config() # a nonzero default should be reported for user_sessions self.assertNotEqual(nat44_ei_config.user_sessions, 0) class TestNAT44Out2InDPO(MethodHolder): """ NAT44EI Test Cases using out2in DPO """ @classmethod def setUpClass(cls): super(TestNAT44Out2InDPO, cls).setUpClass() cls.vapi.cli("set log class nat44-ei 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() def setUp(self): super(TestNAT44Out2InDPO, self).setUp() flags = self.config_flags.NAT44_EI_OUT2IN_DPO self.vapi.nat44_ei_plugin_enable_disable(enable=1, flags=flags) def tearDown(self): super(TestNAT44Out2InDPO, self).tearDown() if not self.vpp_dead: self.vapi.nat44_ei_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 NAT44EI """ self.configure_xlat() flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags) self.vapi.nat44_ei_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 NAT44EI """ 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) class TestNAT44EIMW(MethodHolder): """ NAT44EI Test Cases (multiple workers) """ vpp_worker_count = 2 max_translations = 10240 max_users = 10240 @classmethod def setUpClass(cls): super(TestNAT44EIMW, 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(TestNAT44EIMW, self).setUp() self.vapi.nat44_ei_plugin_enable_disable( sessions=self.max_translations, users=self.max_users, enable=1) def tearDown(self): super(TestNAT44EIMW, self).tearDown() if not self.vpp_dead: self.vapi.nat44_ei_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_ei_plugin_enable_disable(enable=0) self.vapi.cli("clear logging") def test_hairpinning(self): """ NAT44EI 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 worker_1 = 1 worker_2 = 2 self.nat44_add_address(self.nat_addr) flags = self.config_flags.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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['/nat44-ei/hairpinning'] # 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['/nat44-ei/hairpinning'] if_idx = self.pg0.sw_if_index self.assertEqual(after[worker_2][if_idx] - cnt[worker_1][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['/nat44-ei/hairpinning'] if_idx = self.pg0.sw_if_index self.assertEqual(after[worker_1][if_idx] - cnt[worker_1][if_idx], 1) self.assertEqual(after[worker_2][if_idx] - cnt[worker_2][if_idx], 2) def test_hairpinning2(self): """ NAT44EI 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.NAT44_EI_IF_INSIDE self.vapi.nat44_ei_interface_add_del_feature( sw_if_index=self.pg0.sw_if_index, flags=flags, is_add=1) self.vapi.nat44_ei_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 if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)