diff options
Diffstat (limited to 'test/test_nat.py')
| -rw-r--r-- | test/test_nat.py | 9575 |
1 files changed, 0 insertions, 9575 deletions
diff --git a/test/test_nat.py b/test/test_nat.py deleted file mode 100644 index a64b5709c72..00000000000 --- a/test/test_nat.py +++ /dev/null @@ -1,9575 +0,0 @@ -#!/usr/bin/env python - -import socket -import unittest -import struct -import random - -from framework import VppTestCase, VppTestRunner, running_extended_tests - -import scapy.compat -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, \ - ICMPv6ND_NS, ICMPv6ND_NA, ICMPv6NDOptDstLLAddr, fragment6 -from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6, IPv6ExtHdrFragment -from scapy.layers.l2 import Ether, ARP, GRE -from scapy.data import IP_PROTOS -from scapy.packet import bind_layers, Raw -from util import ppp -from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder -from time import sleep -from util import ip4_range -from vpp_papi import mac_pton -from syslog_rfc5424_parser import SyslogMessage, ParseError -from syslog_rfc5424_parser.constants import SyslogFacility, SyslogSeverity -from io import BytesIO -from vpp_papi import VppEnum -from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathType -from vpp_neighbor import VppNeighbor -from vpp_ip import VppIpAddress, VppIpPrefix -from scapy.all import bind_layers, Packet, ByteEnumField, ShortField, \ - IPField, IntField, LongField, XByteField, FlagsField, FieldLenField, \ - PacketListField -from ipaddress import IPv6Network - - -# 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: "udp", 1: "tcp", 2: "icmp"}), - ShortField("flags", 0), - IPField("in_addr", None), - IPField("out_addr", None), - ShortField("in_port", None), - ShortField("out_port", None), - IPField("eh_addr", None), - IPField("ehn_addr", None), - ShortField("eh_port", None), - ShortField("ehn_port", None), - IntField("fib_index", None), - IntField("total_pkts", 0), - LongField("total_bytes", 0)] - - def extract_padding(self, s): - return "", s - - -# NAT HA protocol header -class HANATStateSync(Packet): - name = "HA NAT state sync" - fields_desc = [XByteField("version", 1), - FlagsField("flags", 0, 8, ['ACK']), - FieldLenField("count", None, count_of="events"), - IntField("sequence_number", 1), - IntField("thread_index", 0), - PacketListField("events", [], Event, - count_from=lambda pkt: pkt.count)] - - -class MethodHolder(VppTestCase): - """ NAT create capture and verify method holder """ - - @property - def config_flags(self): - return VppEnum.vl_api_nat_config_flags_t - - @property - def SYSLOG_SEVERITY(self): - return VppEnum.vl_api_syslog_severity_t - - def clear_nat44(self): - """ - Clear NAT44 configuration. - """ - if hasattr(self, 'pg7') and hasattr(self, 'pg8'): - if self.pg7.has_ip4_config: - self.pg7.unconfig_ip4() - - self.vapi.nat44_forwarding_enable_disable(enable=0) - - interfaces = self.vapi.nat44_interface_addr_dump() - for intf in interfaces: - self.vapi.nat44_add_del_interface_addr( - is_add=0, - sw_if_index=intf.sw_if_index, - flags=intf.flags) - - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=0) - self.ipfix_src_port = 4739 - self.ipfix_domain_id = 1 - - self.vapi.syslog_set_filter( - self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_EMERG) - - self.vapi.nat_ha_set_listener(ip_address='0.0.0.0', port=0, - path_mtu=512) - self.vapi.nat_ha_set_failover(ip_address='0.0.0.0', port=0, - session_refresh_interval=10) - - interfaces = self.vapi.nat44_interface_dump() - for intf in interfaces: - if intf.flags & self.config_flags.NAT_IS_INSIDE and \ - intf.flags & self.config_flags.NAT_IS_OUTSIDE: - self.vapi.nat44_interface_add_del_feature( - sw_if_index=intf.sw_if_index) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=intf.sw_if_index, - flags=intf.flags) - - interfaces = self.vapi.nat44_interface_output_feature_dump() - for intf in interfaces: - self.vapi.nat44_interface_add_del_output_feature( - is_add=0, - flags=intf.flags, - sw_if_index=intf.sw_if_index) - static_mappings = self.vapi.nat44_static_mapping_dump() - for sm in static_mappings: - self.vapi.nat44_add_del_static_mapping( - is_add=0, - local_ip_address=sm.local_ip_address, - external_ip_address=sm.external_ip_address, - external_sw_if_index=sm.external_sw_if_index, - local_port=sm.local_port, - external_port=sm.external_port, - vrf_id=sm.vrf_id, - protocol=sm.protocol, - flags=sm.flags, tag=sm.tag) - - lb_static_mappings = self.vapi.nat44_lb_static_mapping_dump() - for lb_sm in lb_static_mappings: - self.vapi.nat44_add_del_lb_static_mapping( - is_add=0, - flags=lb_sm.flags, - external_addr=lb_sm.external_addr, - external_port=lb_sm.external_port, - protocol=lb_sm.protocol, - local_num=0, locals=[], - tag=lb_sm.tag) - - identity_mappings = self.vapi.nat44_identity_mapping_dump() - for id_m in identity_mappings: - self.vapi.nat44_add_del_identity_mapping( - ip_address=id_m.ip_address, - sw_if_index=id_m.sw_if_index, - port=id_m.port, - flags=id_m.flags, - vrf_id=id_m.vrf_id, - protocol=id_m.protocol) - - addresses = self.vapi.nat44_address_dump() - for addr in addresses: - self.vapi.nat44_add_del_address_range( - first_ip_address=addr.ip_address, - last_ip_address=addr.ip_address, - vrf_id=0xFFFFFFFF, flags=addr.flags) - - self.vapi.nat_set_reass(timeout=2, max_reass=1024, max_frag=5, - drop_frag=0) - self.vapi.nat_set_reass(timeout=2, max_reass=1024, max_frag=5, - drop_frag=0, is_ip6=1) - self.verify_no_nat44_user() - self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, - tcp_transitory=240, icmp=60) - self.vapi.nat_set_addr_and_port_alloc_alg() - self.vapi.nat_set_mss_clamping(enable=0, mss_value=1500) - - def nat44_add_static_mapping(self, local_ip, external_ip='0.0.0.0', - local_port=0, external_port=0, vrf_id=0, - is_add=1, external_sw_if_index=0xFFFFFFFF, - proto=0, tag="", flags=0): - """ - Add/delete NAT44 static mapping - - :param local_ip: Local IP address - :param external_ip: External IP address - :param local_port: Local port number (Optional) - :param external_port: External port number (Optional) - :param vrf_id: VRF ID (Default 0) - :param is_add: 1 if add, 0 if delete (Default add) - :param external_sw_if_index: External interface instead of IP address - :param proto: IP protocol (Mandatory if port specified) - :param tag: Opaque string tag - :param flags: NAT configuration flags - """ - - if not (local_port and external_port): - flags |= self.config_flags.NAT_IS_ADDR_ONLY - - self.vapi.nat44_add_del_static_mapping( - is_add=is_add, - local_ip_address=local_ip, - external_ip_address=external_ip, - external_sw_if_index=external_sw_if_index, - local_port=local_port, - external_port=external_port, - vrf_id=vrf_id, protocol=proto, - flags=flags, - tag=tag) - - def nat44_add_address(self, ip, is_add=1, vrf_id=0xFFFFFFFF, twice_nat=0): - """ - Add/delete NAT44 address - - :param ip: IP address - :param is_add: 1 if add, 0 if delete (Default add) - :param twice_nat: twice NAT address for external hosts - """ - flags = self.config_flags.NAT_IS_TWICE_NAT if twice_nat else 0 - self.vapi.nat44_add_del_address_range(first_ip_address=ip, - last_ip_address=ip, - vrf_id=vrf_id, - is_add=is_add, - flags=flags) - - def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64): - """ - Create packet stream for inside network - - :param in_if: Inside interface - :param out_if: Outside interface - :param dst_ip: Destination address - :param ttl: TTL of generated packets - """ - if dst_ip is None: - dst_ip = out_if.remote_ip4 - - pkts = [] - # TCP - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) / - TCP(sport=self.tcp_port_in, dport=20)) - pkts.append(p) - - # UDP - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) / - UDP(sport=self.udp_port_in, dport=20)) - pkts.append(p) - - # ICMP - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) / - ICMP(id=self.icmp_id_in, type='echo-request')) - pkts.append(p) - - return pkts - - def compose_ip6(self, ip4, pref, plen): - """ - Compose IPv4-embedded IPv6 addresses - - :param ip4: IPv4 address - :param pref: IPv6 prefix - :param plen: IPv6 prefix length - :returns: IPv4-embedded IPv6 addresses - """ - pref_n = list(socket.inet_pton(socket.AF_INET6, pref)) - ip4_n = list(socket.inet_pton(socket.AF_INET, ip4)) - if plen == 32: - pref_n[4] = ip4_n[0] - pref_n[5] = ip4_n[1] - pref_n[6] = ip4_n[2] - pref_n[7] = ip4_n[3] - elif plen == 40: - pref_n[5] = ip4_n[0] - pref_n[6] = ip4_n[1] - pref_n[7] = ip4_n[2] - pref_n[9] = ip4_n[3] - elif plen == 48: - pref_n[6] = ip4_n[0] - pref_n[7] = ip4_n[1] - pref_n[9] = ip4_n[2] - pref_n[10] = ip4_n[3] - elif plen == 56: - pref_n[7] = ip4_n[0] - pref_n[9] = ip4_n[1] - pref_n[10] = ip4_n[2] - pref_n[11] = ip4_n[3] - elif plen == 64: - pref_n[9] = ip4_n[0] - pref_n[10] = ip4_n[1] - pref_n[11] = ip4_n[2] - pref_n[12] = ip4_n[3] - elif plen == 96: - pref_n[12] = ip4_n[0] - pref_n[13] = ip4_n[1] - pref_n[14] = ip4_n[2] - pref_n[15] = ip4_n[3] - packed_pref_n = b''.join([scapy.compat.chb(x) for x in pref_n]) - return socket.inet_ntop(socket.AF_INET6, packed_pref_n) - - def extract_ip4(self, ip6, plen): - """ - Extract IPv4 address embedded in IPv6 addresses - - :param ip6: IPv6 address - :param plen: IPv6 prefix length - :returns: extracted IPv4 address - """ - ip6_n = list(socket.inet_pton(socket.AF_INET6, ip6)) - ip4_n = [None] * 4 - if plen == 32: - ip4_n[0] = ip6_n[4] - ip4_n[1] = ip6_n[5] - ip4_n[2] = ip6_n[6] - ip4_n[3] = ip6_n[7] - elif plen == 40: - ip4_n[0] = ip6_n[5] - ip4_n[1] = ip6_n[6] - ip4_n[2] = ip6_n[7] - ip4_n[3] = ip6_n[9] - elif plen == 48: - ip4_n[0] = ip6_n[6] - ip4_n[1] = ip6_n[7] - ip4_n[2] = ip6_n[9] - ip4_n[3] = ip6_n[10] - elif plen == 56: - ip4_n[0] = ip6_n[7] - ip4_n[1] = ip6_n[9] - ip4_n[2] = ip6_n[10] - ip4_n[3] = ip6_n[11] - elif plen == 64: - ip4_n[0] = ip6_n[9] - ip4_n[1] = ip6_n[10] - ip4_n[2] = ip6_n[11] - ip4_n[3] = ip6_n[12] - elif plen == 96: - ip4_n[0] = ip6_n[12] - ip4_n[1] = ip6_n[13] - ip4_n[2] = ip6_n[14] - ip4_n[3] = ip6_n[15] - return socket.inet_ntop(socket.AF_INET, ''.join(ip4_n)) - - def create_stream_in_ip6(self, in_if, out_if, hlim=64, pref=None, plen=0): - """ - Create IPv6 packet stream for inside network - - :param in_if: Inside interface - :param out_if: Outside interface - :param ttl: Hop Limit of generated packets - :param pref: NAT64 prefix - :param plen: NAT64 prefix length - """ - pkts = [] - if pref is None: - dst = ''.join(['64:ff9b::', out_if.remote_ip4]) - else: - dst = self.compose_ip6(out_if.remote_ip4, pref, plen) - - # TCP - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IPv6(src=in_if.remote_ip6, dst=dst, hlim=hlim) / - TCP(sport=self.tcp_port_in, dport=20)) - pkts.append(p) - - # UDP - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IPv6(src=in_if.remote_ip6, dst=dst, hlim=hlim) / - UDP(sport=self.udp_port_in, dport=20)) - pkts.append(p) - - # ICMP - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IPv6(src=in_if.remote_ip6, dst=dst, hlim=hlim) / - ICMPv6EchoRequest(id=self.icmp_id_in)) - pkts.append(p) - - return pkts - - def create_stream_out(self, out_if, dst_ip=None, ttl=64, - 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.append(p) - - # UDP - p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / - IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / - UDP(dport=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): - """ - 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 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 same_port: - self.assertEqual(packet[UDP].sport, self.udp_port_in) - else: - self.assertNotEqual( - packet[UDP].sport, self.udp_port_in) - self.udp_port_out = packet[UDP].sport - else: - if same_port: - self.assertEqual(packet[ICMP46].id, self.icmp_id_in) - else: - self.assertNotEqual(packet[ICMP46].id, self.icmp_id_in) - self.icmp_id_out = packet[ICMP46].id - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet " - "(outside network):", packet)) - raise - - def verify_capture_out_ip6(self, capture, nat_ip, same_port=False, - dst_ip=None): - """ - Verify captured packets on outside network - - :param capture: Captured packets - :param nat_ip: Translated IP address - :param same_port: Source port number is not translated (Default False) - :param dst_ip: Destination IP address (Default do not verify) - """ - return self.verify_capture_out(capture, nat_ip, same_port, dst_ip, - True) - - def verify_capture_in(self, capture, in_if): - """ - Verify captured packets on inside network - - :param capture: Captured packets - :param in_if: Inside interface - """ - for packet in capture: - try: - self.assert_packet_checksums_valid(packet) - self.assertEqual(packet[IP].dst, in_if.remote_ip4) - if packet.haslayer(TCP): - self.assertEqual(packet[TCP].dport, self.tcp_port_in) - elif packet.haslayer(UDP): - self.assertEqual(packet[UDP].dport, self.udp_port_in) - else: - self.assertEqual(packet[ICMP].id, self.icmp_id_in) - except: - self.logger.error(ppp("Unexpected or invalid packet " - "(inside network):", packet)) - raise - - def verify_capture_in_ip6(self, capture, src_ip, dst_ip): - """ - Verify captured IPv6 packets on inside network - - :param capture: Captured packets - :param src_ip: Source IP - :param dst_ip: Destination IP address - """ - for packet in capture: - try: - self.assertEqual(packet[IPv6].src, src_ip) - self.assertEqual(packet[IPv6].dst, dst_ip) - self.assert_packet_checksums_valid(packet) - if packet.haslayer(TCP): - self.assertEqual(packet[TCP].dport, self.tcp_port_in) - elif packet.haslayer(UDP): - self.assertEqual(packet[UDP].dport, self.udp_port_in) - else: - self.assertEqual(packet[ICMPv6EchoReply].id, - self.icmp_id_in) - except: - self.logger.error(ppp("Unexpected or invalid packet " - "(inside network):", packet)) - raise - - def verify_capture_no_translation(self, capture, ingress_if, egress_if): - """ - Verify captured packet that don't have to be translated - - :param capture: Captured packets - :param ingress_if: Ingress interface - :param egress_if: Egress interface - """ - for packet in capture: - try: - self.assertEqual(packet[IP].src, ingress_if.remote_ip4) - self.assertEqual(packet[IP].dst, egress_if.remote_ip4) - if packet.haslayer(TCP): - self.assertEqual(packet[TCP].sport, self.tcp_port_in) - elif packet.haslayer(UDP): - self.assertEqual(packet[UDP].sport, self.udp_port_in) - else: - self.assertEqual(packet[ICMP].id, self.icmp_id_in) - except: - self.logger.error(ppp("Unexpected or invalid packet " - "(inside network):", packet)) - raise - - def verify_capture_out_with_icmp_errors(self, capture, src_ip=None, - icmp_type=11): - """ - Verify captured packets with ICMP errors on outside network - - :param capture: Captured packets - :param src_ip: Translated IP address or IP address of VPP - (Default use global NAT address) - :param icmp_type: Type of error ICMP packet - we are expecting (Default 11) - """ - if src_ip is None: - src_ip = self.nat_addr - for packet in capture: - try: - self.assertEqual(packet[IP].src, src_ip) - self.assertEqual(packet.haslayer(ICMP), 1) - icmp = packet[ICMP] - self.assertEqual(icmp.type, icmp_type) - self.assertTrue(icmp.haslayer(IPerror)) - inner_ip = icmp[IPerror] - if inner_ip.haslayer(TCPerror): - self.assertEqual(inner_ip[TCPerror].dport, - self.tcp_port_out) - elif inner_ip.haslayer(UDPerror): - self.assertEqual(inner_ip[UDPerror].dport, - self.udp_port_out) - else: - self.assertEqual(inner_ip[ICMPerror].id, self.icmp_id_out) - except: - self.logger.error(ppp("Unexpected or invalid packet " - "(outside network):", packet)) - raise - - def verify_capture_in_with_icmp_errors(self, capture, in_if, icmp_type=11): - """ - Verify captured packets with ICMP errors on inside network - - :param capture: Captured packets - :param in_if: Inside interface - :param icmp_type: Type of error ICMP packet - we are expecting (Default 11) - """ - for packet in capture: - try: - self.assertEqual(packet[IP].dst, in_if.remote_ip4) - self.assertEqual(packet.haslayer(ICMP), 1) - icmp = packet[ICMP] - self.assertEqual(icmp.type, icmp_type) - self.assertTrue(icmp.haslayer(IPerror)) - inner_ip = icmp[IPerror] - if inner_ip.haslayer(TCPerror): - self.assertEqual(inner_ip[TCPerror].sport, - self.tcp_port_in) - elif inner_ip.haslayer(UDPerror): - self.assertEqual(inner_ip[UDPerror].sport, - self.udp_port_in) - else: - self.assertEqual(inner_ip[ICMPerror].id, self.icmp_id_in) - except: - self.logger.error(ppp("Unexpected or invalid packet " - "(inside network):", packet)) - raise - - def create_stream_frag(self, src_if, dst, sport, dport, data, - proto=IP_PROTOS.tcp, echo_reply=False): - """ - Create fragmented packet stream - - :param src_if: Source interface - :param dst: Destination IPv4 address - :param sport: Source port - :param dport: Destination port - :param data: Payload data - :param proto: protocol (TCP, UDP, ICMP) - :param echo_reply: use echo_reply if protocol is ICMP - :returns: Fragments - """ - if proto == IP_PROTOS.tcp: - p = (IP(src=src_if.remote_ip4, dst=dst) / - TCP(sport=sport, dport=dport) / - Raw(data)) - p = p.__class__(scapy.compat.raw(p)) - chksum = p[TCP].chksum - proto_header = TCP(sport=sport, dport=dport, chksum=chksum) - elif proto == IP_PROTOS.udp: - proto_header = UDP(sport=sport, dport=dport) - elif proto == IP_PROTOS.icmp: - if not echo_reply: - proto_header = ICMP(id=sport, type='echo-request') - else: - proto_header = ICMP(id=sport, type='echo-reply') - else: - raise Exception("Unsupported protocol") - id = random.randint(0, 65535) - pkts = [] - if proto == IP_PROTOS.tcp: - raw = Raw(data[0:4]) - else: - raw = Raw(data[0:16]) - p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) / - IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=0, id=id) / - proto_header / - raw) - pkts.append(p) - if proto == IP_PROTOS.tcp: - raw = Raw(data[4:20]) - else: - raw = Raw(data[16:32]) - p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) / - IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=3, id=id, - proto=proto) / - raw) - pkts.append(p) - if proto == IP_PROTOS.tcp: - raw = Raw(data[20:]) - else: - raw = Raw(data[32:]) - p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) / - IP(src=src_if.remote_ip4, dst=dst, frag=5, proto=proto, - id=id) / - raw) - pkts.append(p) - return pkts - - def create_stream_frag_ip6(self, src_if, dst, sport, dport, data, - pref=None, plen=0, frag_size=128): - """ - Create fragmented packet stream - - :param src_if: Source interface - :param dst: Destination IPv4 address - :param sport: Source TCP port - :param dport: Destination TCP port - :param data: Payload data - :param pref: NAT64 prefix - :param plen: NAT64 prefix length - :param fragsize: size of fragments - :returns: Fragments - """ - if pref is None: - dst_ip6 = ''.join(['64:ff9b::', dst]) - else: - dst_ip6 = self.compose_ip6(dst, pref, plen) - - p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / - IPv6(src=src_if.remote_ip6, dst=dst_ip6) / - IPv6ExtHdrFragment(id=random.randint(0, 65535)) / - TCP(sport=sport, dport=dport) / - Raw(data)) - - return fragment6(p, frag_size) - - 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.assert_tcp_checksum_valid(p) - elif ip.proto == IP_PROTOS.udp: - p = (ip / UDP(buffer.getvalue()[:8]) / - Raw(buffer.getvalue()[8:])) - elif ip.proto == IP_PROTOS.icmp: - p = (ip / ICMP(buffer.getvalue())) - return p - - def reass_frags_and_verify_ip6(self, frags, src, dst): - """ - Reassemble and verify fragmented packet - - :param frags: Captured fragments - :param src: Source IPv6 address to verify - :param dst: Destination IPv6 address to verify - - :returns: Reassembled IPv6 packet - """ - buffer = BytesIO() - for p in frags: - self.assertEqual(p[IPv6].src, src) - self.assertEqual(p[IPv6].dst, dst) - buffer.seek(p[IPv6ExtHdrFragment].offset * 8) - buffer.write(bytes(p[IPv6ExtHdrFragment].payload)) - ip = IPv6(src=frags[0][IPv6].src, dst=frags[0][IPv6].dst, - nh=frags[0][IPv6ExtHdrFragment].nh) - if ip.nh == IP_PROTOS.tcp: - p = (ip / TCP(buffer.getvalue())) - elif ip.nh == IP_PROTOS.udp: - p = (ip / UDP(buffer.getvalue())) - self.assert_packet_checksums_valid(p) - return p - - def initiate_tcp_session(self, in_if, out_if): - """ - Initiates TCP session - - :param in_if: Inside interface - :param out_if: Outside interface - """ - try: - # SYN packet in->out - p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) / - IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="S")) - in_if.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = out_if.get_capture(1) - p = capture[0] - self.tcp_port_out = p[TCP].sport - - # SYN + ACK packet out->in - p = (Ether(src=out_if.remote_mac, dst=out_if.local_mac) / - IP(src=out_if.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="SA")) - out_if.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - in_if.get_capture(1) - - # ACK packet in->out - p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) / - IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="A")) - in_if.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - out_if.get_capture(1) - - except: - self.logger.error("TCP 3 way handshake failed") - raise - - def verify_ipfix_nat44_ses(self, data): - """ - Verify IPFIX NAT44 session create/delete event - - :param data: Decoded IPFIX data records - """ - nat44_ses_create_num = 0 - nat44_ses_delete_num = 0 - self.assertEqual(6, len(data)) - for record in data: - # natEvent - self.assertIn(scapy.compat.orb(record[230]), [4, 5]) - if scapy.compat.orb(record[230]) == 4: - nat44_ses_create_num += 1 - else: - nat44_ses_delete_num += 1 - # sourceIPv4Address - self.assertEqual(self.pg0.remote_ip4n, record[8]) - # postNATSourceIPv4Address - self.assertEqual(socket.inet_pton(socket.AF_INET, self.nat_addr), - record[225]) - # ingressVRFID - self.assertEqual(struct.pack("!I", 0), record[234]) - # protocolIdentifier/sourceTransportPort - # /postNAPTSourceTransportPort - if IP_PROTOS.icmp == scapy.compat.orb(record[4]): - self.assertEqual(struct.pack("!H", self.icmp_id_in), record[7]) - self.assertEqual(struct.pack("!H", self.icmp_id_out), - record[227]) - elif IP_PROTOS.tcp == scapy.compat.orb(record[4]): - self.assertEqual(struct.pack("!H", self.tcp_port_in), - record[7]) - self.assertEqual(struct.pack("!H", self.tcp_port_out), - record[227]) - elif IP_PROTOS.udp == scapy.compat.orb(record[4]): - self.assertEqual(struct.pack("!H", self.udp_port_in), - record[7]) - self.assertEqual(struct.pack("!H", self.udp_port_out), - record[227]) - else: - self.fail("Invalid protocol") - self.assertEqual(3, nat44_ses_create_num) - self.assertEqual(3, nat44_ses_delete_num) - - def verify_ipfix_addr_exhausted(self, data): - """ - Verify IPFIX NAT addresses event - - :param data: Decoded IPFIX data records - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - self.assertEqual(scapy.compat.orb(record[230]), 3) - # natPoolID - self.assertEqual(struct.pack("!I", 0), record[283]) - - def verify_ipfix_max_sessions(self, data, limit): - """ - Verify IPFIX maximum session entries exceeded event - - :param data: Decoded IPFIX data records - :param limit: Number of maximum session entries that can be created. - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - self.assertEqual(scapy.compat.orb(record[230]), 13) - # natQuotaExceededEvent - self.assertEqual(struct.pack("I", 1), record[466]) - # maxSessionEntries - self.assertEqual(struct.pack("I", limit), record[471]) - - def verify_ipfix_max_bibs(self, data, limit): - """ - Verify IPFIX maximum BIB entries exceeded event - - :param data: Decoded IPFIX data records - :param limit: Number of maximum BIB entries that can be created. - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - self.assertEqual(scapy.compat.orb(record[230]), 13) - # natQuotaExceededEvent - self.assertEqual(struct.pack("I", 2), record[466]) - # maxBIBEntries - self.assertEqual(struct.pack("I", limit), record[472]) - - def verify_ipfix_max_fragments_ip6(self, data, limit, src_addr): - """ - Verify IPFIX maximum IPv6 fragments pending reassembly exceeded event - - :param data: Decoded IPFIX data records - :param limit: Number of maximum fragments pending reassembly - :param src_addr: IPv6 source address - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - self.assertEqual(scapy.compat.orb(record[230]), 13) - # natQuotaExceededEvent - self.assertEqual(struct.pack("I", 5), record[466]) - # maxFragmentsPendingReassembly - self.assertEqual(struct.pack("I", limit), record[475]) - # sourceIPv6Address - self.assertEqual(src_addr, record[27]) - - def verify_ipfix_max_fragments_ip4(self, data, limit, src_addr): - """ - Verify IPFIX maximum IPv4 fragments pending reassembly exceeded event - - :param data: Decoded IPFIX data records - :param limit: Number of maximum fragments pending reassembly - :param src_addr: IPv4 source address - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - self.assertEqual(scapy.compat.orb(record[230]), 13) - # natQuotaExceededEvent - self.assertEqual(struct.pack("I", 5), record[466]) - # maxFragmentsPendingReassembly - self.assertEqual(struct.pack("I", limit), record[475]) - # sourceIPv4Address - self.assertEqual(src_addr, record[8]) - - def verify_ipfix_bib(self, data, is_create, src_addr): - """ - Verify IPFIX NAT64 BIB create and delete events - - :param data: Decoded IPFIX data records - :param is_create: Create event if nonzero value otherwise delete event - :param src_addr: IPv6 source address - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - if is_create: - self.assertEqual(scapy.compat.orb(record[230]), 10) - else: - self.assertEqual(scapy.compat.orb(record[230]), 11) - # sourceIPv6Address - self.assertEqual(src_addr, record[27]) - # postNATSourceIPv4Address - self.assertEqual(self.nat_addr_n, record[225]) - # protocolIdentifier - self.assertEqual(IP_PROTOS.tcp, scapy.compat.orb(record[4])) - # ingressVRFID - self.assertEqual(struct.pack("!I", 0), record[234]) - # sourceTransportPort - self.assertEqual(struct.pack("!H", self.tcp_port_in), record[7]) - # postNAPTSourceTransportPort - self.assertEqual(struct.pack("!H", self.tcp_port_out), record[227]) - - def verify_ipfix_nat64_ses(self, data, is_create, src_addr, dst_addr, - dst_port): - """ - Verify IPFIX NAT64 session create and delete events - - :param data: Decoded IPFIX data records - :param is_create: Create event if nonzero value otherwise delete event - :param src_addr: IPv6 source address - :param dst_addr: IPv4 destination address - :param dst_port: destination TCP port - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - if is_create: - self.assertEqual(scapy.compat.orb(record[230]), 6) - else: - self.assertEqual(scapy.compat.orb(record[230]), 7) - # sourceIPv6Address - self.assertEqual(src_addr, record[27]) - # destinationIPv6Address - self.assertEqual(socket.inet_pton(socket.AF_INET6, - self.compose_ip6(dst_addr, - '64:ff9b::', - 96)), - record[28]) - # postNATSourceIPv4Address - self.assertEqual(self.nat_addr_n, record[225]) - # postNATDestinationIPv4Address - self.assertEqual(socket.inet_pton(socket.AF_INET, dst_addr), - record[226]) - # protocolIdentifier - self.assertEqual(IP_PROTOS.tcp, scapy.compat.orb(record[4])) - # ingressVRFID - self.assertEqual(struct.pack("!I", 0), record[234]) - # sourceTransportPort - self.assertEqual(struct.pack("!H", self.tcp_port_in), record[7]) - # postNAPTSourceTransportPort - self.assertEqual(struct.pack("!H", self.tcp_port_out), record[227]) - # destinationTransportPort - self.assertEqual(struct.pack("!H", dst_port), record[11]) - # postNAPTDestinationTransportPort - self.assertEqual(struct.pack("!H", dst_port), record[228]) - - def verify_no_nat44_user(self): - """ Verify that there is no NAT44 user """ - users = self.vapi.nat44_user_dump() - self.assertEqual(len(users), 0) - users = self.statistics.get_counter('/nat44/total-users') - self.assertEqual(users[0][0], 0) - sessions = self.statistics.get_counter('/nat44/total-sessions') - self.assertEqual(sessions[0][0], 0) - - def verify_ipfix_max_entries_per_user(self, data, limit, src_addr): - """ - Verify IPFIX maximum entries per user exceeded event - - :param data: Decoded IPFIX data records - :param limit: Number of maximum entries per user - :param src_addr: IPv4 source address - """ - self.assertEqual(1, len(data)) - record = data[0] - # natEvent - self.assertEqual(scapy.compat.orb(record[230]), 13) - # natQuotaExceededEvent - self.assertEqual(struct.pack("I", 3), record[466]) - # maxEntriesPerUser - self.assertEqual(struct.pack("I", limit), record[473]) - # sourceIPv4Address - self.assertEqual(src_addr, record[8]) - - def verify_syslog_apmap(self, data, is_add=True): - message = data.decode('utf-8') - try: - message = SyslogMessage.parse(message) - except ParseError as e: - self.logger.error(e) - raise - else: - self.assertEqual(message.severity, SyslogSeverity.info) - self.assertEqual(message.appname, 'NAT') - self.assertEqual(message.msgid, 'APMADD' if is_add else 'APMDEL') - sd_params = message.sd.get('napmap') - self.assertTrue(sd_params is not None) - self.assertEqual(sd_params.get('IATYP'), 'IPv4') - self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4) - self.assertEqual(sd_params.get('ISPORT'), "%d" % self.tcp_port_in) - self.assertEqual(sd_params.get('XATYP'), 'IPv4') - self.assertEqual(sd_params.get('XSADDR'), self.nat_addr) - self.assertEqual(sd_params.get('XSPORT'), "%d" % self.tcp_port_out) - self.assertEqual(sd_params.get('PROTO'), "%d" % IP_PROTOS.tcp) - self.assertTrue(sd_params.get('SSUBIX') is not None) - self.assertEqual(sd_params.get('SVLAN'), '0') - - def verify_syslog_sess(self, data, is_add=True, is_ip6=False): - message = data.decode('utf-8') - try: - message = SyslogMessage.parse(message) - except ParseError as e: - self.logger.error(e) - raise - else: - self.assertEqual(message.severity, SyslogSeverity.info) - self.assertEqual(message.appname, 'NAT') - self.assertEqual(message.msgid, 'SADD' if is_add else 'SDEL') - sd_params = message.sd.get('nsess') - self.assertTrue(sd_params is not None) - if is_ip6: - self.assertEqual(sd_params.get('IATYP'), 'IPv6') - self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip6) - else: - self.assertEqual(sd_params.get('IATYP'), 'IPv4') - self.assertEqual(sd_params.get('ISADDR'), self.pg0.remote_ip4) - self.assertTrue(sd_params.get('SSUBIX') is not None) - self.assertEqual(sd_params.get('ISPORT'), "%d" % self.tcp_port_in) - self.assertEqual(sd_params.get('XATYP'), 'IPv4') - self.assertEqual(sd_params.get('XSADDR'), self.nat_addr) - self.assertEqual(sd_params.get('XSPORT'), "%d" % self.tcp_port_out) - self.assertEqual(sd_params.get('PROTO'), "%d" % IP_PROTOS.tcp) - self.assertEqual(sd_params.get('SVLAN'), '0') - self.assertEqual(sd_params.get('XDADDR'), self.pg1.remote_ip4) - self.assertEqual(sd_params.get('XDPORT'), - "%d" % self.tcp_external_port) - - def verify_mss_value(self, pkt, mss): - """ - Verify TCP MSS value - - :param pkt: - :param mss: - """ - if not pkt.haslayer(IP) or not pkt.haslayer(TCP): - raise TypeError("Not a TCP/IP packet") - - for option in pkt[TCP].options: - if option[0] == 'MSS': - self.assertEqual(option[1], mss) - self.assert_tcp_checksum_valid(pkt) - - @staticmethod - def proto2layer(proto): - if proto == IP_PROTOS.tcp: - return TCP - elif proto == IP_PROTOS.udp: - return UDP - elif proto == IP_PROTOS.icmp: - return ICMP - else: - raise Exception("Unsupported protocol") - - def frag_in_order(self, proto=IP_PROTOS.tcp, dont_translate=False): - 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) - - reass = self.vapi.nat_reass_dump() - reass_n_start = len(reass) - - # 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) - self.assertNotEqual(p[layer].sport, self.port_in) - else: - self.assertEqual(p[layer].sport, self.port_in) - else: - 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) - - reass = self.vapi.nat_reass_dump() - reass_n_end = len(reass) - - self.assertEqual(reass_n_end - reass_n_start, 2) - - def frag_in_order_in_plus_out(self, proto=IP_PROTOS.tcp): - layer = self.proto2layer(proto) - - if proto == IP_PROTOS.tcp: - data = b"A" * 4 + b"B" * 16 + b"C" * 3 - else: - data = b"A" * 16 + b"B" * 16 + b"C" * 3 - self.port_in = random.randint(1025, 65535) - - for i in range(2): - reass = self.vapi.nat_reass_dump() - reass_n_start = len(reass) - - # out2in - pkts = self.create_stream_frag(self.pg0, - self.server_out_addr, - self.port_in, - self.server_out_port, - data, - proto) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg1.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.pg0.remote_ip4, - self.server_in_addr) - if proto != IP_PROTOS.icmp: - self.assertEqual(p[layer].sport, self.port_in) - self.assertEqual(p[layer].dport, self.server_in_port) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) - - # in2out - if proto != IP_PROTOS.icmp: - pkts = self.create_stream_frag(self.pg1, - self.pg0.remote_ip4, - self.server_in_port, - p[layer].sport, - data, - proto) - else: - pkts = self.create_stream_frag(self.pg1, - self.pg0.remote_ip4, - p[layer].id, - 0, - data, - proto, - echo_reply=True) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg0.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.server_out_addr, - self.pg0.remote_ip4) - if proto != IP_PROTOS.icmp: - self.assertEqual(p[layer].sport, self.server_out_port) - self.assertEqual(p[layer].dport, self.port_in) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) - - reass = self.vapi.nat_reass_dump() - reass_n_end = len(reass) - - self.assertEqual(reass_n_end - reass_n_start, 2) - - def reass_hairpinning(self, proto=IP_PROTOS.tcp): - layer = self.proto2layer(proto) - - if proto == IP_PROTOS.tcp: - data = b"A" * 4 + b"B" * 16 + b"C" * 3 - else: - data = b"A" * 16 + b"B" * 16 + b"C" * 3 - - # send packet from host to server - pkts = self.create_stream_frag(self.pg0, - self.nat_addr, - self.host_in_port, - self.server_out_port, - data, - proto) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg0.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.nat_addr, - self.server.ip4) - if proto != IP_PROTOS.icmp: - self.assertNotEqual(p[layer].sport, self.host_in_port) - self.assertEqual(p[layer].dport, self.server_in_port) - else: - self.assertNotEqual(p[layer].id, self.host_in_port) - self.assertEqual(data, p[Raw].load) - - def frag_out_of_order(self, proto=IP_PROTOS.tcp, dont_translate=False): - layer = self.proto2layer(proto) - - if proto == IP_PROTOS.tcp: - data = b"A" * 4 + b"B" * 16 + b"C" * 3 - else: - data = b"A" * 16 + b"B" * 16 + b"C" * 3 - self.port_in = random.randint(1025, 65535) - - for i in range(2): - # in2out - pkts = self.create_stream_frag(self.pg0, - self.pg1.remote_ip4, - self.port_in, - 20, - data, - proto) - pkts.reverse() - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg1.get_capture(len(pkts)) - if not dont_translate: - p = self.reass_frags_and_verify(frags, - self.nat_addr, - self.pg1.remote_ip4) - else: - p = self.reass_frags_and_verify(frags, - self.pg0.remote_ip4, - self.pg1.remote_ip4) - if proto != IP_PROTOS.icmp: - if not dont_translate: - self.assertEqual(p[layer].dport, 20) - self.assertNotEqual(p[layer].sport, self.port_in) - else: - self.assertEqual(p[layer].sport, self.port_in) - else: - if not dont_translate: - self.assertNotEqual(p[layer].id, self.port_in) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) - - # out2in - if not dont_translate: - dst_addr = self.nat_addr - else: - dst_addr = self.pg0.remote_ip4 - if proto != IP_PROTOS.icmp: - sport = 20 - dport = p[layer].sport - else: - sport = p[layer].id - dport = 0 - pkts = self.create_stream_frag(self.pg1, - dst_addr, - sport, - dport, - data, - proto, - echo_reply=True) - pkts.reverse() - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg0.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.pg1.remote_ip4, - self.pg0.remote_ip4) - if proto != IP_PROTOS.icmp: - self.assertEqual(p[layer].sport, 20) - self.assertEqual(p[layer].dport, self.port_in) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) - - def frag_out_of_order_in_plus_out(self, proto=IP_PROTOS.tcp): - layer = self.proto2layer(proto) - - if proto == IP_PROTOS.tcp: - data = b"A" * 4 + b"B" * 16 + b"C" * 3 - else: - data = b"A" * 16 + b"B" * 16 + b"C" * 3 - self.port_in = random.randint(1025, 65535) - - for i in range(2): - # out2in - pkts = self.create_stream_frag(self.pg0, - self.server_out_addr, - self.port_in, - self.server_out_port, - data, - proto) - pkts.reverse() - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg1.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.pg0.remote_ip4, - self.server_in_addr) - if proto != IP_PROTOS.icmp: - self.assertEqual(p[layer].dport, self.server_in_port) - self.assertEqual(p[layer].sport, self.port_in) - self.assertEqual(p[layer].dport, self.server_in_port) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) - - # in2out - if proto != IP_PROTOS.icmp: - pkts = self.create_stream_frag(self.pg1, - self.pg0.remote_ip4, - self.server_in_port, - p[layer].sport, - data, - proto) - else: - pkts = self.create_stream_frag(self.pg1, - self.pg0.remote_ip4, - p[layer].id, - 0, - data, - proto, - echo_reply=True) - pkts.reverse() - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg0.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.server_out_addr, - self.pg0.remote_ip4) - if proto != IP_PROTOS.icmp: - self.assertEqual(p[layer].sport, self.server_out_port) - self.assertEqual(p[layer].dport, self.port_in) - else: - self.assertEqual(p[layer].id, self.port_in) - self.assertEqual(data, p[Raw].load) - - -class TestNAT44(MethodHolder): - """ NAT44 Test Cases """ - - @classmethod - def setUpClass(cls): - super(TestNAT44, cls).setUpClass() - cls.vapi.cli("set log class nat level debug") - - try: - cls.tcp_port_in = 6303 - cls.tcp_port_out = 6303 - cls.udp_port_in = 6304 - cls.udp_port_out = 6304 - cls.icmp_id_in = 6305 - cls.icmp_id_out = 6305 - cls.nat_addr = '10.0.0.3' - cls.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_id=10) - cls.vapi.ip_table_add_del(is_add=1, table_id=20) - - cls.pg4._local_ip4 = VppIpPrefix("172.16.255.1", - cls.pg4.local_ip4_prefix.len) - cls.pg4._remote_hosts[0]._ip4 = "172.16.255.2" - cls.pg4.set_table_ip4(10) - cls.pg5._local_ip4 = VppIpPrefix("172.17.255.3", - cls.pg5.local_ip4_prefix.len) - cls.pg5._remote_hosts[0]._ip4 = "172.17.255.4" - cls.pg5.set_table_ip4(10) - cls.pg6._local_ip4 = VppIpPrefix("172.16.255.1", - cls.pg6.local_ip4_prefix.len) - 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=VppIpPrefix("10.0.0.1", 24).encode()) - - 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() - - except Exception: - super(TestNAT44, cls).tearDownClass() - raise - - @classmethod - def tearDownClass(cls): - super(TestNAT44, cls).tearDownClass() - - def test_dynamic(self): - """ NAT44 dynamic translation test """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # in2out - tcpn = self.statistics.get_err_counter( - '/err/nat44-in2out-slowpath/TCP packets') - udpn = self.statistics.get_err_counter( - '/err/nat44-in2out-slowpath/UDP packets') - icmpn = self.statistics.get_err_counter( - '/err/nat44-in2out-slowpath/ICMP packets') - totaln = self.statistics.get_err_counter( - '/err/nat44-in2out-slowpath/good in2out packets processed') - - 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) - - err = self.statistics.get_err_counter( - '/err/nat44-in2out-slowpath/TCP packets') - self.assertEqual(err - tcpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-in2out-slowpath/UDP packets') - self.assertEqual(err - udpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-in2out-slowpath/ICMP packets') - self.assertEqual(err - icmpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-in2out-slowpath/good in2out packets processed') - self.assertEqual(err - totaln, 3) - - # out2in - tcpn = self.statistics.get_err_counter('/err/nat44-out2in/TCP packets') - udpn = self.statistics.get_err_counter('/err/nat44-out2in/UDP packets') - icmpn = self.statistics.get_err_counter( - '/err/nat44-out2in/ICMP packets') - totaln = self.statistics.get_err_counter( - '/err/nat44-out2in/good out2in packets processed') - - 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) - - err = self.statistics.get_err_counter('/err/nat44-out2in/TCP packets') - self.assertEqual(err - tcpn, 1) - err = self.statistics.get_err_counter('/err/nat44-out2in/UDP packets') - self.assertEqual(err - udpn, 1) - err = self.statistics.get_err_counter('/err/nat44-out2in/ICMP packets') - self.assertEqual(err - icmpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-out2in/good out2in packets processed') - self.assertEqual(err - totaln, 3) - - users = self.statistics.get_counter('/nat44/total-users') - self.assertEqual(users[0][0], 1) - sessions = self.statistics.get_counter('/nat44/total-sessions') - self.assertEqual(sessions[0][0], 3) - - def test_dynamic_icmp_errors_in2out_ttl_1(self): - """ NAT44 handling of client packets with TTL=1 """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # Client side - generate traffic - pkts = self.create_stream_in(self.pg0, self.pg1, ttl=1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Client side - verify ICMP type 11 packets - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in_with_icmp_errors(capture, self.pg0) - - def test_dynamic_icmp_errors_out2in_ttl_1(self): - """ NAT44 handling of server packets with TTL=1 """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # Client side - create sessions - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Server side - generate traffic - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - pkts = self.create_stream_out(self.pg1, ttl=1) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Server side - verify ICMP type 11 packets - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out_with_icmp_errors(capture, - src_ip=self.pg1.local_ip4) - - def test_dynamic_icmp_errors_in2out_ttl_2(self): - """ NAT44 handling of error responses to client packets with TTL=2 """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # Client side - generate traffic - pkts = self.create_stream_in(self.pg0, self.pg1, ttl=2) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Server side - simulate ICMP type 11 response - capture = self.pg1.get_capture(len(pkts)) - pkts = [Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - ICMP(type=11) / packet[IP] for packet in capture] - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Client side - verify ICMP type 11 packets - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in_with_icmp_errors(capture, self.pg0) - - def test_dynamic_icmp_errors_out2in_ttl_2(self): - """ NAT44 handling of error responses to server packets with TTL=2 """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # Client side - create sessions - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Server side - generate traffic - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - pkts = self.create_stream_out(self.pg1, ttl=2) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Client side - simulate ICMP type 11 response - capture = self.pg0.get_capture(len(pkts)) - pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - ICMP(type=11) / packet[IP] for packet in capture] - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Server side - verify ICMP type 11 packets - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out_with_icmp_errors(capture) - - def test_ping_out_interface_from_outside(self): - """ Ping NAT44 out interface from outside network """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) / - ICMP(id=self.icmp_id_out, type='echo-request')) - pkts = [p] - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - packet = capture[0] - try: - self.assertEqual(packet[IP].src, self.pg1.local_ip4) - self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) - self.assertEqual(packet[ICMP].id, self.icmp_id_in) - self.assertEqual(packet[ICMP].type, 0) # echo reply - except: - self.logger.error(ppp("Unexpected or invalid packet " - "(outside network):", packet)) - raise - - def test_ping_internal_host_from_outside(self): - """ Ping internal host from outside network """ - - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # out2in - pkt = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr, ttl=64) / - ICMP(id=self.icmp_id_out, type='echo-request')) - self.pg1.add_stream(pkt) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - self.verify_capture_in(capture, self.pg0) - self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp) - - # in2out - pkt = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4, ttl=64) / - ICMP(id=self.icmp_id_in, type='echo-reply')) - self.pg0.add_stream(pkt) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - self.verify_capture_out(capture, same_port=True) - self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp) - - def test_forwarding(self): - """ NAT44 forwarding test """ - - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_forwarding_enable_disable(enable=1) - - real_ip = self.pg0.remote_ip4n - alias_ip = self.nat_addr - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_static_mapping(is_add=1, - local_ip_address=real_ip, - external_ip_address=alias_ip, - external_sw_if_index=0xFFFFFFFF, - flags=flags) - - try: - # static mapping match - - pkts = self.create_stream_out(self.pg1) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, same_port=True) - - # no static mapping match - - host0 = self.pg0.remote_hosts[0] - self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1] - try: - pkts = self.create_stream_out(self.pg1, - dst_ip=self.pg0.remote_ip4, - use_inside_ports=True) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4, - same_port=True) - finally: - self.pg0.remote_hosts[0] = host0 - - finally: - self.vapi.nat44_forwarding_enable_disable(enable=0) - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_static_mapping( - is_add=0, - local_ip_address=real_ip, - external_ip_address=alias_ip, - external_sw_if_index=0xFFFFFFFF, - flags=flags) - - def test_static_in(self): - """ 1:1 NAT initialized from inside network """ - - nat_ip = "10.0.0.10" - self.tcp_port_out = 6303 - self.udp_port_out = 6304 - self.icmp_id_out = 6305 - - self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - sm = self.vapi.nat44_static_mapping_dump() - self.assertEqual(len(sm), 1) - self.assertEqual((sm[0].tag).split(b'\0', 1)[0], b'') - self.assertEqual(sm[0].protocol, 0) - self.assertEqual(sm[0].local_port, 0) - self.assertEqual(sm[0].external_port, 0) - - # in2out - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip, True) - - # out2in - pkts = self.create_stream_out(self.pg1, nat_ip) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - def test_static_out(self): - """ 1:1 NAT initialized from outside network """ - - nat_ip = "10.0.0.20" - self.tcp_port_out = 6303 - self.udp_port_out = 6304 - self.icmp_id_out = 6305 - tag = b"testTAG" - - self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip, tag=tag) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - sm = self.vapi.nat44_static_mapping_dump() - self.assertEqual(len(sm), 1) - self.assertEqual((sm[0].tag).split(b'\0', 1)[0], tag) - - # out2in - pkts = self.create_stream_out(self.pg1, nat_ip) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - # in2out - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip, True) - - def test_static_with_port_in(self): - """ 1:1 NAPT initialized from inside network """ - - self.tcp_port_out = 3606 - self.udp_port_out = 3607 - self.icmp_id_out = 3608 - - self.nat44_add_address(self.nat_addr) - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - self.tcp_port_in, self.tcp_port_out, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - self.udp_port_in, self.udp_port_out, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - self.icmp_id_in, self.icmp_id_out, - proto=IP_PROTOS.icmp) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # in2out - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # out2in - pkts = self.create_stream_out(self.pg1) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - def test_static_with_port_out(self): - """ 1:1 NAPT initialized from outside network """ - - self.tcp_port_out = 30606 - self.udp_port_out = 30607 - self.icmp_id_out = 30608 - - self.nat44_add_address(self.nat_addr) - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - self.tcp_port_in, self.tcp_port_out, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - self.udp_port_in, self.udp_port_out, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - self.icmp_id_in, self.icmp_id_out, - proto=IP_PROTOS.icmp) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # out2in - pkts = self.create_stream_out(self.pg1) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - # in2out - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - - def test_static_vrf_aware(self): - """ 1:1 NAT VRF awareness """ - - nat_ip1 = "10.0.0.30" - nat_ip2 = "10.0.0.40" - self.tcp_port_out = 6303 - self.udp_port_out = 6304 - self.icmp_id_out = 6305 - - self.nat44_add_static_mapping(self.pg4.remote_ip4, nat_ip1, - vrf_id=10) - self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip2, - vrf_id=10) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg3.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg4.sw_if_index, - flags=flags, is_add=1) - - # inside interface VRF match NAT44 static mapping VRF - pkts = self.create_stream_in(self.pg4, self.pg3) - self.pg4.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip1, True) - - # inside interface VRF don't match NAT44 static mapping VRF (packets - # are dropped) - pkts = self.create_stream_in(self.pg0, self.pg3) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg3.assert_nothing_captured() - - def test_dynamic_to_static(self): - """ Switch from dynamic translation to 1:1NAT """ - nat_ip = "10.0.0.10" - self.tcp_port_out = 6303 - self.udp_port_out = 6304 - self.icmp_id_out = 6305 - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # dynamic - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # 1:1NAT - self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0) - self.assertEqual(len(sessions), 0) - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip, True) - - def test_identity_nat(self): - """ Identity NAT """ - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_identity_mapping( - ip_address=self.pg0.remote_ip4n, sw_if_index=0xFFFFFFFF, - flags=flags, is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) / - TCP(sport=12345, dport=56789)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg0.remote_ip4) - self.assertEqual(ip.src, self.pg1.remote_ip4) - self.assertEqual(tcp.dport, 56789) - self.assertEqual(tcp.sport, 12345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0) - self.assertEqual(len(sessions), 0) - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_identity_mapping( - ip_address=self.pg0.remote_ip4n, sw_if_index=0xFFFFFFFF, - flags=flags, vrf_id=1, is_add=1) - identity_mappings = self.vapi.nat44_identity_mapping_dump() - self.assertEqual(len(identity_mappings), 2) - - def test_multiple_inside_interfaces(self): - """ NAT44 multiple non-overlapping address space inside interfaces """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg3.sw_if_index, - is_add=1) - - # between two NAT44 inside interfaces (no translation) - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_no_translation(capture, self.pg0, self.pg1) - - # from NAT44 inside to interface without NAT44 feature (no translation) - pkts = self.create_stream_in(self.pg0, self.pg2) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg2.get_capture(len(pkts)) - self.verify_capture_no_translation(capture, self.pg0, self.pg2) - - # in2out 1st interface - pkts = self.create_stream_in(self.pg0, self.pg3) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # out2in 1st interface - pkts = self.create_stream_out(self.pg3) - self.pg3.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - # in2out 2nd interface - pkts = self.create_stream_in(self.pg1, self.pg3) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # out2in 2nd interface - pkts = self.create_stream_out(self.pg3) - self.pg3.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg1) - - def test_inside_overlapping_interfaces(self): - """ NAT44 multiple inside interfaces with overlapping address space """ - - static_nat_ip = "10.0.0.10" - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg3.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg4.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg5.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg6.sw_if_index, - flags=flags, is_add=1) - self.nat44_add_static_mapping(self.pg6.remote_ip4, static_nat_ip, - vrf_id=20) - - # between NAT44 inside interfaces with same VRF (no translation) - pkts = self.create_stream_in(self.pg4, self.pg5) - self.pg4.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(len(pkts)) - self.verify_capture_no_translation(capture, self.pg4, self.pg5) - - # between NAT44 inside interfaces with different VRF (hairpinning) - p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / - IP(src=self.pg4.remote_ip4, dst=static_nat_ip) / - TCP(sport=1234, dport=5678)) - self.pg4.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(ip.dst, self.pg6.remote_ip4) - self.assertNotEqual(tcp.sport, 1234) - self.assertEqual(tcp.dport, 5678) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # in2out 1st interface - pkts = self.create_stream_in(self.pg4, self.pg3) - self.pg4.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # out2in 1st interface - pkts = self.create_stream_out(self.pg3) - self.pg3.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg4.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg4) - - # in2out 2nd interface - pkts = self.create_stream_in(self.pg5, self.pg3) - self.pg5.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # out2in 2nd interface - pkts = self.create_stream_out(self.pg3) - self.pg3.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg5) - - # pg5 session dump - addresses = self.vapi.nat44_address_dump() - self.assertEqual(len(addresses), 1) - sessions = self.vapi.nat44_user_session_dump(self.pg5.remote_ip4n, 10) - self.assertEqual(len(sessions), 3) - for session in sessions: - self.assertFalse(session.flags & self.config_flags.NAT_IS_STATIC) - self.assertEqual(str(session.inside_ip_address), - self.pg5.remote_ip4) - self.assertEqual(session.outside_ip_address, - addresses[0].ip_address) - self.assertEqual(sessions[0].protocol, IP_PROTOS.tcp) - self.assertEqual(sessions[1].protocol, IP_PROTOS.udp) - self.assertEqual(sessions[2].protocol, IP_PROTOS.icmp) - self.assertEqual(sessions[0].inside_port, self.tcp_port_in) - self.assertEqual(sessions[1].inside_port, self.udp_port_in) - self.assertEqual(sessions[2].inside_port, self.icmp_id_in) - self.assertEqual(sessions[0].outside_port, self.tcp_port_out) - self.assertEqual(sessions[1].outside_port, self.udp_port_out) - self.assertEqual(sessions[2].outside_port, self.icmp_id_out) - - # in2out 3rd interface - pkts = self.create_stream_in(self.pg6, self.pg3) - self.pg6.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(len(pkts)) - self.verify_capture_out(capture, static_nat_ip, True) - - # out2in 3rd interface - pkts = self.create_stream_out(self.pg3, static_nat_ip) - self.pg3.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg6) - - # general user and session dump verifications - users = self.vapi.nat44_user_dump() - self.assertGreaterEqual(len(users), 3) - addresses = self.vapi.nat44_address_dump() - self.assertEqual(len(addresses), 1) - for user in users: - sessions = self.vapi.nat44_user_session_dump(user.ip_address, - user.vrf_id) - for session in sessions: - self.assertEqual(user.ip_address, session.inside_ip_address) - self.assertTrue(session.total_bytes > session.total_pkts > 0) - self.assertTrue(session.protocol in - [IP_PROTOS.tcp, IP_PROTOS.udp, - IP_PROTOS.icmp]) - self.assertFalse(session.flags & - self.config_flags.NAT_IS_EXT_HOST_VALID) - - # pg4 session dump - sessions = self.vapi.nat44_user_session_dump(self.pg4.remote_ip4n, 10) - self.assertGreaterEqual(len(sessions), 4) - for session in sessions: - self.assertFalse(session.flags & self.config_flags.NAT_IS_STATIC) - self.assertEqual(str(session.inside_ip_address), - self.pg4.remote_ip4) - self.assertEqual(session.outside_ip_address, - addresses[0].ip_address) - - # pg6 session dump - sessions = self.vapi.nat44_user_session_dump(self.pg6.remote_ip4n, 20) - self.assertGreaterEqual(len(sessions), 3) - for session in sessions: - self.assertTrue(session.flags & self.config_flags.NAT_IS_STATIC) - self.assertEqual(str(session.inside_ip_address), - self.pg6.remote_ip4) - self.assertEqual(str(session.outside_ip_address), - static_nat_ip) - self.assertTrue(session.inside_port in - [self.tcp_port_in, self.udp_port_in, - self.icmp_id_in]) - - def test_hairpinning(self): - """ NAT44 hairpinning - 1:1 NAPT """ - - host = self.pg0.remote_hosts[0] - server = self.pg0.remote_hosts[1] - host_in_port = 1234 - host_out_port = 0 - server_in_port = 5678 - server_out_port = 8765 - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # add static mapping for server - self.nat44_add_static_mapping(server.ip4, self.nat_addr, - server_in_port, server_out_port, - proto=IP_PROTOS.tcp) - - # 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_hairpinning2(self): - """ NAT44 hairpinning - 1:1 NAT""" - - server1_nat_ip = "10.0.0.10" - server2_nat_ip = "10.0.0.11" - host = self.pg0.remote_hosts[0] - server1 = self.pg0.remote_hosts[1] - server2 = self.pg0.remote_hosts[2] - server_tcp_port = 22 - server_udp_port = 20 - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # add static mapping for servers - self.nat44_add_static_mapping(server1.ip4, server1_nat_ip) - self.nat44_add_static_mapping(server2.ip4, server2_nat_ip) - - # host to server1 - pkts = [] - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=host.ip4, dst=server1_nat_ip) / - TCP(sport=self.tcp_port_in, dport=server_tcp_port)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=host.ip4, dst=server1_nat_ip) / - UDP(sport=self.udp_port_in, dport=server_udp_port)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=host.ip4, dst=server1_nat_ip) / - ICMP(id=self.icmp_id_in, type='echo-request')) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IP].src, self.nat_addr) - self.assertEqual(packet[IP].dst, server1.ip4) - if packet.haslayer(TCP): - self.assertNotEqual(packet[TCP].sport, self.tcp_port_in) - self.assertEqual(packet[TCP].dport, server_tcp_port) - self.tcp_port_out = packet[TCP].sport - self.assert_packet_checksums_valid(packet) - elif packet.haslayer(UDP): - self.assertNotEqual(packet[UDP].sport, self.udp_port_in) - self.assertEqual(packet[UDP].dport, server_udp_port) - self.udp_port_out = packet[UDP].sport - else: - self.assertNotEqual(packet[ICMP].id, self.icmp_id_in) - self.icmp_id_out = packet[ICMP].id - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # server1 to host - pkts = [] - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=server1.ip4, dst=self.nat_addr) / - TCP(sport=server_tcp_port, dport=self.tcp_port_out)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=server1.ip4, dst=self.nat_addr) / - UDP(sport=server_udp_port, dport=self.udp_port_out)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=server1.ip4, dst=self.nat_addr) / - ICMP(id=self.icmp_id_out, type='echo-reply')) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IP].src, server1_nat_ip) - self.assertEqual(packet[IP].dst, host.ip4) - if packet.haslayer(TCP): - self.assertEqual(packet[TCP].dport, self.tcp_port_in) - self.assertEqual(packet[TCP].sport, server_tcp_port) - self.assert_packet_checksums_valid(packet) - elif packet.haslayer(UDP): - self.assertEqual(packet[UDP].dport, self.udp_port_in) - self.assertEqual(packet[UDP].sport, server_udp_port) - else: - self.assertEqual(packet[ICMP].id, self.icmp_id_in) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # server2 to server1 - pkts = [] - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=server2.ip4, dst=server1_nat_ip) / - TCP(sport=self.tcp_port_in, dport=server_tcp_port)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=server2.ip4, dst=server1_nat_ip) / - UDP(sport=self.udp_port_in, dport=server_udp_port)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=server2.ip4, dst=server1_nat_ip) / - ICMP(id=self.icmp_id_in, type='echo-request')) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IP].src, server2_nat_ip) - self.assertEqual(packet[IP].dst, server1.ip4) - if packet.haslayer(TCP): - self.assertEqual(packet[TCP].sport, self.tcp_port_in) - self.assertEqual(packet[TCP].dport, server_tcp_port) - self.tcp_port_out = packet[TCP].sport - self.assert_packet_checksums_valid(packet) - elif packet.haslayer(UDP): - self.assertEqual(packet[UDP].sport, self.udp_port_in) - self.assertEqual(packet[UDP].dport, server_udp_port) - self.udp_port_out = packet[UDP].sport - else: - self.assertEqual(packet[ICMP].id, self.icmp_id_in) - self.icmp_id_out = packet[ICMP].id - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # server1 to server2 - pkts = [] - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=server1.ip4, dst=server2_nat_ip) / - TCP(sport=server_tcp_port, dport=self.tcp_port_out)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=server1.ip4, dst=server2_nat_ip) / - UDP(sport=server_udp_port, dport=self.udp_port_out)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=server1.ip4, dst=server2_nat_ip) / - ICMP(id=self.icmp_id_out, type='echo-reply')) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IP].src, server1_nat_ip) - self.assertEqual(packet[IP].dst, server2.ip4) - if packet.haslayer(TCP): - self.assertEqual(packet[TCP].dport, self.tcp_port_in) - self.assertEqual(packet[TCP].sport, server_tcp_port) - self.assert_packet_checksums_valid(packet) - elif packet.haslayer(UDP): - self.assertEqual(packet[UDP].dport, self.udp_port_in) - self.assertEqual(packet[UDP].sport, server_udp_port) - else: - self.assertEqual(packet[ICMP].id, self.icmp_id_in) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_max_translations_per_user(self): - """ MAX translations per user - recycle the least recently used """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # get maximum number of translations per user - nat44_config = self.vapi.nat_show_config() - - # send more than maximum number of translations per user packets - pkts_num = nat44_config.max_translations_per_user + 5 - pkts = [] - for port in range(0, pkts_num): - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=1025 + port)) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # verify number of translated packet - self.pg1.get_capture(pkts_num) - - users = self.vapi.nat44_user_dump() - for user in users: - if user.ip_address == self.pg0.remote_ip4n: - self.assertEqual(user.nsessions, - nat44_config.max_translations_per_user) - self.assertEqual(user.nstaticsessions, 0) - - tcp_port = 22 - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - tcp_port, tcp_port, - proto=IP_PROTOS.tcp) - 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=tcp_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - users = self.vapi.nat44_user_dump() - for user in users: - if user.ip_address == self.pg0.remote_ip4n: - self.assertEqual(user.nsessions, - nat44_config.max_translations_per_user - 1) - self.assertEqual(user.nstaticsessions, 1) - - def test_interface_addr(self): - """ Acquire NAT44 addresses from interface """ - self.vapi.nat44_add_del_interface_addr( - is_add=1, - sw_if_index=self.pg7.sw_if_index) - - # no address in NAT pool - addresses = self.vapi.nat44_address_dump() - self.assertEqual(0, len(addresses)) - - # configure interface address and check NAT address pool - self.pg7.config_ip4() - addresses = self.vapi.nat44_address_dump() - self.assertEqual(1, len(addresses)) - self.assertEqual(str(addresses[0].ip_address), self.pg7.local_ip4) - - # remove interface address and check NAT address pool - self.pg7.unconfig_ip4() - addresses = self.vapi.nat44_address_dump() - self.assertEqual(0, len(addresses)) - - def test_interface_addr_static_mapping(self): - """ Static mapping with addresses from interface """ - tag = b"testTAG" - - self.vapi.nat44_add_del_interface_addr( - is_add=1, - sw_if_index=self.pg7.sw_if_index) - self.nat44_add_static_mapping( - '1.2.3.4', - external_sw_if_index=self.pg7.sw_if_index, - tag=tag) - - # static mappings with external interface - static_mappings = self.vapi.nat44_static_mapping_dump() - self.assertEqual(1, len(static_mappings)) - self.assertEqual(self.pg7.sw_if_index, - static_mappings[0].external_sw_if_index) - self.assertEqual((static_mappings[0].tag).split(b'\0', 1)[0], tag) - - # configure interface address and check static mappings - self.pg7.config_ip4() - static_mappings = self.vapi.nat44_static_mapping_dump() - self.assertEqual(2, len(static_mappings)) - resolved = False - for sm in static_mappings: - if sm.external_sw_if_index == 0xFFFFFFFF: - self.assertEqual(str(sm.external_ip_address), - self.pg7.local_ip4) - self.assertEqual((sm.tag).split(b'\0', 1)[0], tag) - resolved = True - self.assertTrue(resolved) - - # remove interface address and check static mappings - self.pg7.unconfig_ip4() - static_mappings = self.vapi.nat44_static_mapping_dump() - self.assertEqual(1, len(static_mappings)) - self.assertEqual(self.pg7.sw_if_index, - static_mappings[0].external_sw_if_index) - self.assertEqual((static_mappings[0].tag).split(b'\0', 1)[0], tag) - - # configure interface address again and check static mappings - self.pg7.config_ip4() - static_mappings = self.vapi.nat44_static_mapping_dump() - self.assertEqual(2, len(static_mappings)) - resolved = False - for sm in static_mappings: - if sm.external_sw_if_index == 0xFFFFFFFF: - self.assertEqual(str(sm.external_ip_address), - self.pg7.local_ip4) - self.assertEqual((sm.tag).split(b'\0', 1)[0], tag) - resolved = True - self.assertTrue(resolved) - - # remove static mapping - self.nat44_add_static_mapping( - '1.2.3.4', - external_sw_if_index=self.pg7.sw_if_index, - tag=tag, - is_add=0) - static_mappings = self.vapi.nat44_static_mapping_dump() - self.assertEqual(0, len(static_mappings)) - - def test_interface_addr_identity_nat(self): - """ Identity NAT with addresses from interface """ - - port = 53053 - self.vapi.nat44_add_del_interface_addr( - is_add=1, - sw_if_index=self.pg7.sw_if_index) - self.vapi.nat44_add_del_identity_mapping( - ip_address=b'0', - sw_if_index=self.pg7.sw_if_index, - port=port, - protocol=IP_PROTOS.tcp, - is_add=1) - - # identity mappings with external interface - identity_mappings = self.vapi.nat44_identity_mapping_dump() - self.assertEqual(1, len(identity_mappings)) - self.assertEqual(self.pg7.sw_if_index, - identity_mappings[0].sw_if_index) - - # configure interface address and check identity mappings - self.pg7.config_ip4() - identity_mappings = self.vapi.nat44_identity_mapping_dump() - resolved = False - self.assertEqual(2, len(identity_mappings)) - for sm in identity_mappings: - if sm.sw_if_index == 0xFFFFFFFF: - self.assertEqual(str(identity_mappings[0].ip_address), - self.pg7.local_ip4) - self.assertEqual(port, identity_mappings[0].port) - self.assertEqual(IP_PROTOS.tcp, identity_mappings[0].protocol) - resolved = True - self.assertTrue(resolved) - - # remove interface address and check identity mappings - self.pg7.unconfig_ip4() - identity_mappings = self.vapi.nat44_identity_mapping_dump() - self.assertEqual(1, len(identity_mappings)) - self.assertEqual(self.pg7.sw_if_index, - identity_mappings[0].sw_if_index) - - def test_ipfix_nat44_sess(self): - """ IPFIX logging NAT44 session created/deleted """ - self.ipfix_domain_id = 10 - self.ipfix_src_port = 20202 - collector_port = 30303 - bind_layers(UDP, IPFIX, dport=30303) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n, - src_address=self.pg3.local_ip4n, - path_mtu=512, - template_interval=10, - collector_port=collector_port) - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=1) - - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - self.nat44_add_address(self.nat_addr, is_add=0) - self.vapi.ipfix_flush() - capture = self.pg3.get_capture(9) - ipfix = IPFIXDecoder() - # first load template - for p in capture: - self.assertTrue(p.haslayer(IPFIX)) - self.assertEqual(p[IP].src, self.pg3.local_ip4) - self.assertEqual(p[IP].dst, self.pg3.remote_ip4) - self.assertEqual(p[UDP].sport, self.ipfix_src_port) - self.assertEqual(p[UDP].dport, collector_port) - self.assertEqual(p[IPFIX].observationDomainID, - self.ipfix_domain_id) - if p.haslayer(Template): - ipfix.add_template(p.getlayer(Template)) - # verify events in data set - for p in capture: - if p.haslayer(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_nat44_ses(data) - - def test_ipfix_addr_exhausted(self): - """ IPFIX logging NAT addresses exhausted """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n, - src_address=self.pg3.local_ip4n, - path_mtu=512, - template_interval=10) - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=1) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=3025)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sleep(1) - self.vapi.ipfix_flush() - capture = self.pg3.get_capture(9) - ipfix = IPFIXDecoder() - # first load template - for p in capture: - self.assertTrue(p.haslayer(IPFIX)) - self.assertEqual(p[IP].src, self.pg3.local_ip4) - self.assertEqual(p[IP].dst, self.pg3.remote_ip4) - self.assertEqual(p[UDP].sport, self.ipfix_src_port) - self.assertEqual(p[UDP].dport, 4739) - self.assertEqual(p[IPFIX].observationDomainID, - self.ipfix_domain_id) - if p.haslayer(Template): - ipfix.add_template(p.getlayer(Template)) - # verify events in data set - for p in capture: - if p.haslayer(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_addr_exhausted(data) - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_ipfix_max_sessions(self): - """ IPFIX logging maximum session entries exceeded """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - nat44_config = self.vapi.nat_show_config() - max_sessions = 10 * nat44_config.translation_buckets - - 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_ip4n, - src_address=self.pg3.local_ip4n, - path_mtu=512, - template_interval=10) - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=1) - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=1025)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sleep(1) - self.vapi.ipfix_flush() - capture = self.pg3.get_capture(9) - ipfix = IPFIXDecoder() - # first load template - for p in capture: - self.assertTrue(p.haslayer(IPFIX)) - self.assertEqual(p[IP].src, self.pg3.local_ip4) - self.assertEqual(p[IP].dst, self.pg3.remote_ip4) - self.assertEqual(p[UDP].sport, self.ipfix_src_port) - self.assertEqual(p[UDP].dport, 4739) - self.assertEqual(p[IPFIX].observationDomainID, - self.ipfix_domain_id) - if p.haslayer(Template): - ipfix.add_template(p.getlayer(Template)) - # verify events in data set - for p in capture: - if p.haslayer(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_max_sessions(data, max_sessions) - - def test_syslog_apmap(self): - """ Test syslog address and port mapping creation and deletion """ - self.vapi.syslog_set_filter( - self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_INFO) - self.vapi.syslog_set_sender(self.pg3.local_ip4n, self.pg3.remote_ip4n) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=20)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - self.tcp_port_out = capture[0][TCP].sport - capture = self.pg3.get_capture(1) - self.verify_syslog_apmap(capture[0][Raw].load) - - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.nat44_add_address(self.nat_addr, is_add=0) - capture = self.pg3.get_capture(1) - self.verify_syslog_apmap(capture[0][Raw].load, False) - - def test_pool_addr_fib(self): - """ NAT44 add pool addresses to FIB """ - static_addr = '10.0.0.10' - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.nat44_add_static_mapping(self.pg0.remote_ip4, static_addr) - - # NAT44 address - p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / - ARP(op=ARP.who_has, pdst=self.nat_addr, - psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - self.assertTrue(capture[0].haslayer(ARP)) - self.assertTrue(capture[0][ARP].op, ARP.is_at) - - # 1:1 NAT address - p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / - ARP(op=ARP.who_has, pdst=static_addr, - psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - self.assertTrue(capture[0].haslayer(ARP)) - self.assertTrue(capture[0][ARP].op, ARP.is_at) - - # send ARP to non-NAT44 interface - p = (Ether(src=self.pg2.remote_mac, dst='ff:ff:ff:ff:ff:ff') / - ARP(op=ARP.who_has, pdst=self.nat_addr, - psrc=self.pg2.remote_ip4, hwsrc=self.pg2.remote_mac)) - self.pg2.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - - # remove addresses and verify - self.nat44_add_address(self.nat_addr, is_add=0) - self.nat44_add_static_mapping(self.pg0.remote_ip4, static_addr, - is_add=0) - - p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / - ARP(op=ARP.who_has, pdst=self.nat_addr, - psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - - p = (Ether(src=self.pg1.remote_mac, dst='ff:ff:ff:ff:ff:ff') / - ARP(op=ARP.who_has, pdst=static_addr, - psrc=self.pg1.remote_ip4, hwsrc=self.pg1.remote_mac)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - - def test_vrf_mode(self): - """ NAT44 tenant VRF aware address pool mode """ - - vrf_id1 = 1 - vrf_id2 = 2 - nat_ip1 = "10.0.0.10" - nat_ip2 = "10.0.0.11" - - self.pg0.unconfig_ip4() - self.pg1.unconfig_ip4() - self.vapi.ip_table_add_del(is_add=1, table_id=vrf_id1) - self.vapi.ip_table_add_del(is_add=1, table_id=vrf_id2) - self.pg0.set_table_ip4(vrf_id1) - self.pg1.set_table_ip4(vrf_id2) - self.pg0.config_ip4() - self.pg1.config_ip4() - self.pg0.resolve_arp() - self.pg1.resolve_arp() - - self.nat44_add_address(nat_ip1, vrf_id=vrf_id1) - self.nat44_add_address(nat_ip2, vrf_id=vrf_id2) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg2.sw_if_index, - is_add=1) - - try: - # first VRF - pkts = self.create_stream_in(self.pg0, self.pg2) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg2.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip1) - - # second VRF - pkts = self.create_stream_in(self.pg1, self.pg2) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg2.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip2) - - finally: - self.pg0.unconfig_ip4() - self.pg1.unconfig_ip4() - self.pg0.set_table_ip4(0) - self.pg1.set_table_ip4(0) - self.pg0.config_ip4() - self.pg1.config_ip4() - self.pg0.resolve_arp() - self.pg1.resolve_arp() - self.vapi.ip_table_add_del(is_add=0, table_id=vrf_id1) - self.vapi.ip_table_add_del(is_add=0, table_id=vrf_id2) - - def test_vrf_feature_independent(self): - """ NAT44 tenant VRF independent address pool mode """ - - nat_ip1 = "10.0.0.10" - nat_ip2 = "10.0.0.11" - - self.nat44_add_address(nat_ip1) - self.nat44_add_address(nat_ip2, vrf_id=99) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg2.sw_if_index, - is_add=1) - - # first VRF - pkts = self.create_stream_in(self.pg0, self.pg2) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg2.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip1) - - # second VRF - pkts = self.create_stream_in(self.pg1, self.pg2) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg2.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip1) - - def create_routes_and_neigbors(self): - r1 = VppIpRoute(self, self.pg7.remote_ip4, 32, - [VppRoutePath(self.pg7.remote_ip4, - self.pg7.sw_if_index)]) - r2 = VppIpRoute(self, self.pg8.remote_ip4, 32, - [VppRoutePath(self.pg8.remote_ip4, - self.pg8.sw_if_index)]) - r1.add_vpp_config() - r2.add_vpp_config() - - n1 = VppNeighbor(self, - self.pg7.sw_if_index, - self.pg7.remote_mac, - self.pg7.remote_ip4, - is_static=1) - n2 = VppNeighbor(self, - self.pg8.sw_if_index, - self.pg8.remote_mac, - self.pg8.remote_ip4, - is_static=1) - n1.add_vpp_config() - n2.add_vpp_config() - - def test_dynamic_ipless_interfaces(self): - """ NAT44 interfaces without configured IP address """ - self.create_routes_and_neigbors() - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg7.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg8.sw_if_index, - is_add=1) - - # in2out - pkts = self.create_stream_in(self.pg7, self.pg8) - self.pg7.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg8.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # out2in - pkts = self.create_stream_out(self.pg8, self.nat_addr) - self.pg8.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg7.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg7) - - def test_static_ipless_interfaces(self): - """ NAT44 interfaces without configured IP address - 1:1 NAT """ - - self.create_routes_and_neigbors() - self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg7.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg8.sw_if_index, - is_add=1) - - # out2in - pkts = self.create_stream_out(self.pg8) - self.pg8.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg7.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg7) - - # in2out - pkts = self.create_stream_in(self.pg7, self.pg8) - self.pg7.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg8.get_capture(len(pkts)) - self.verify_capture_out(capture, self.nat_addr, True) - - def test_static_with_port_ipless_interfaces(self): - """ NAT44 interfaces without configured IP address - 1:1 NAPT """ - - self.tcp_port_out = 30606 - self.udp_port_out = 30607 - self.icmp_id_out = 30608 - - self.create_routes_and_neigbors() - self.nat44_add_address(self.nat_addr) - self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr, - self.tcp_port_in, self.tcp_port_out, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr, - self.udp_port_in, self.udp_port_out, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.pg7.remote_ip4, self.nat_addr, - self.icmp_id_in, self.icmp_id_out, - proto=IP_PROTOS.icmp) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg7.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg8.sw_if_index, - is_add=1) - - # out2in - pkts = self.create_stream_out(self.pg8) - self.pg8.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg7.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg7) - - # in2out - pkts = self.create_stream_in(self.pg7, self.pg8) - self.pg7.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg8.get_capture(len(pkts)) - self.verify_capture_out(capture) - - def test_static_unknown_proto(self): - """ 1:1 NAT translate packet with unknown protocol """ - nat_ip = "10.0.0.10" - self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # in2out - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, nat_ip) - self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # out2in - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=nat_ip) / - GRE() / - IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, self.pg1.remote_ip4) - self.assertEqual(packet[IP].dst, self.pg0.remote_ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_hairpinning_static_unknown_proto(self): - """ 1:1 NAT translate packet with unknown protocol - hairpinning """ - - host = self.pg0.remote_hosts[0] - server = self.pg0.remote_hosts[1] - - host_nat_ip = "10.0.0.10" - server_nat_ip = "10.0.0.11" - - self.nat44_add_static_mapping(host.ip4, host_nat_ip) - self.nat44_add_static_mapping(server.ip4, server_nat_ip) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # host to server - p = (Ether(dst=self.pg0.local_mac, src=host.mac) / - IP(src=host.ip4, dst=server_nat_ip) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, host_nat_ip) - self.assertEqual(packet[IP].dst, server.ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # server to host - p = (Ether(dst=self.pg0.local_mac, src=server.mac) / - IP(src=server.ip4, dst=host_nat_ip) / - GRE() / - IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, server_nat_ip) - self.assertEqual(packet[IP].dst, host.ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_output_feature(self): - """ NAT44 interface output feature (in2out postrouting) """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, flags=flags, - sw_if_index=self.pg1.sw_if_index) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg3.sw_if_index) - - # in2out - pkts = self.create_stream_in(self.pg0, self.pg3) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # out2in - pkts = self.create_stream_out(self.pg3) - self.pg3.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - # from non-NAT interface to NAT inside interface - pkts = self.create_stream_in(self.pg2, self.pg0) - self.pg2.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_no_translation(capture, self.pg2, self.pg0) - - def test_output_feature_vrf_aware(self): - """ NAT44 interface output feature VRF aware (in2out postrouting) """ - nat_ip_vrf10 = "10.0.0.10" - nat_ip_vrf20 = "10.0.0.20" - - r1 = VppIpRoute(self, self.pg3.remote_ip4, 32, - [VppRoutePath(self.pg3.remote_ip4, - self.pg3.sw_if_index)], - table_id=10) - r2 = VppIpRoute(self, self.pg3.remote_ip4, 32, - [VppRoutePath(self.pg3.remote_ip4, - self.pg3.sw_if_index)], - table_id=20) - r1.add_vpp_config() - r2.add_vpp_config() - - self.nat44_add_address(nat_ip_vrf10, vrf_id=10) - self.nat44_add_address(nat_ip_vrf20, vrf_id=20) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, flags=flags, - sw_if_index=self.pg4.sw_if_index) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, flags=flags, - sw_if_index=self.pg6.sw_if_index) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg3.sw_if_index) - - # in2out VRF 10 - pkts = self.create_stream_in(self.pg4, self.pg3) - self.pg4.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=nat_ip_vrf10) - - # out2in VRF 10 - pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf10) - self.pg3.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg4.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg4) - - # in2out VRF 20 - pkts = self.create_stream_in(self.pg6, self.pg3) - self.pg6.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=nat_ip_vrf20) - - # out2in VRF 20 - pkts = self.create_stream_out(self.pg3, dst_ip=nat_ip_vrf20) - self.pg3.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg6) - - def test_output_feature_hairpinning(self): - """ NAT44 interface output feature hairpinning (in2out postrouting) """ - host = self.pg0.remote_hosts[0] - server = self.pg0.remote_hosts[1] - host_in_port = 1234 - host_out_port = 0 - server_in_port = 5678 - server_out_port = 8765 - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - - # add static mapping for server - self.nat44_add_static_mapping(server.ip4, self.nat_addr, - server_in_port, server_out_port, - proto=IP_PROTOS.tcp) - - # send packet from host to server - p = (Ether(src=host.mac, dst=self.pg0.local_mac) / - IP(src=host.ip4, dst=self.nat_addr) / - TCP(sport=host_in_port, dport=server_out_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(ip.dst, server.ip4) - self.assertNotEqual(tcp.sport, host_in_port) - self.assertEqual(tcp.dport, server_in_port) - self.assert_packet_checksums_valid(p) - host_out_port = tcp.sport - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # send reply from server to host - p = (Ether(src=server.mac, dst=self.pg0.local_mac) / - IP(src=server.ip4, dst=self.nat_addr) / - TCP(sport=server_in_port, dport=host_out_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(ip.dst, host.ip4) - self.assertEqual(tcp.sport, server_out_port) - self.assertEqual(tcp.dport, host_in_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_one_armed_nat44(self): - """ One armed NAT44 """ - remote_host = self.pg9.remote_hosts[0] - local_host = self.pg9.remote_hosts[1] - external_port = 0 - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg9.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg9.sw_if_index, - flags=flags, is_add=1) - - # in2out - p = (Ether(src=self.pg9.remote_mac, dst=self.pg9.local_mac) / - IP(src=local_host.ip4, dst=remote_host.ip4) / - TCP(sport=12345, dport=80)) - self.pg9.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg9.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(ip.dst, remote_host.ip4) - self.assertNotEqual(tcp.sport, 12345) - external_port = tcp.sport - self.assertEqual(tcp.dport, 80) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # out2in - p = (Ether(src=self.pg9.remote_mac, dst=self.pg9.local_mac) / - IP(src=remote_host.ip4, dst=self.nat_addr) / - TCP(sport=80, dport=external_port)) - self.pg9.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg9.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, remote_host.ip4) - self.assertEqual(ip.dst, local_host.ip4) - self.assertEqual(tcp.sport, 80) - self.assertEqual(tcp.dport, 12345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - err = self.statistics.get_err_counter( - '/err/nat44-classify/next in2out') - self.assertEqual(err, 1) - err = self.statistics.get_err_counter( - '/err/nat44-classify/next out2in') - self.assertEqual(err, 1) - - def test_del_session(self): - """ Delete NAT44 session """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(len(pkts)) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0) - nsessions = len(sessions) - - self.vapi.nat44_del_session(address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=self.config_flags.NAT_IS_INSIDE) - self.vapi.nat44_del_session(address=sessions[1].outside_ip_address, - port=sessions[1].outside_port, - protocol=sessions[1].protocol) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0) - self.assertEqual(nsessions - len(sessions), 2) - - self.vapi.nat44_del_session(address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=self.config_flags.NAT_IS_INSIDE) - - self.verify_no_nat44_user() - - def test_set_get_reass(self): - """ NAT44 set/get virtual fragmentation reassembly """ - reas_cfg1 = self.vapi.nat_get_reass() - - self.vapi.nat_set_reass(timeout=reas_cfg1.ip4_timeout + 5, - max_reass=reas_cfg1.ip4_max_reass * 2, - max_frag=reas_cfg1.ip4_max_frag * 2, - drop_frag=0) - - reas_cfg2 = self.vapi.nat_get_reass() - - self.assertEqual(reas_cfg1.ip4_timeout + 5, reas_cfg2.ip4_timeout) - self.assertEqual(reas_cfg1.ip4_max_reass * 2, reas_cfg2.ip4_max_reass) - self.assertEqual(reas_cfg1.ip4_max_frag * 2, reas_cfg2.ip4_max_frag) - - self.vapi.nat_set_reass(timeout=2, max_reass=1024, max_frag=5, - drop_frag=1) - self.assertTrue(self.vapi.nat_get_reass().ip4_drop_frag) - - def test_frag_in_order(self): - """ NAT44 translate fragments arriving in order """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - reas_cfg1 = self.vapi.nat_get_reass() - # this test was intermittently failing in some cases - # until we temporarily bump the reassembly timeouts - self.vapi.nat_set_reass(timeout=20, max_reass=1024, max_frag=5, - drop_frag=0) - - self.frag_in_order(proto=IP_PROTOS.tcp) - self.frag_in_order(proto=IP_PROTOS.udp) - self.frag_in_order(proto=IP_PROTOS.icmp) - - # restore the reassembly timeouts - self.vapi.nat_set_reass(timeout=reas_cfg1.ip4_timeout, - max_reass=reas_cfg1.ip4_max_reass, - max_frag=reas_cfg1.ip4_max_frag, - drop_frag=reas_cfg1.ip4_drop_frag) - - def test_frag_forwarding(self): - """ NAT44 forwarding fragment test """ - self.vapi.nat44_add_del_interface_addr( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_forwarding_enable_disable(enable=1) - - data = b"A" * 16 + b"B" * 16 + b"C" * 3 - pkts = self.create_stream_frag(self.pg1, - self.pg0.remote_ip4, - 4789, - 4789, - data, - proto=IP_PROTOS.udp) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg0.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.pg1.remote_ip4, - self.pg0.remote_ip4) - self.assertEqual(p[UDP].sport, 4789) - self.assertEqual(p[UDP].dport, 4789) - self.assertEqual(data, p[Raw].load) - - def test_reass_hairpinning(self): - """ NAT44 fragments hairpinning """ - - self.server = self.pg0.remote_hosts[1] - self.host_in_port = random.randint(1025, 65535) - self.server_in_port = random.randint(1025, 65535) - self.server_out_port = random.randint(1025, 65535) - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - # add static mapping for server - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr) - - self.reass_hairpinning(proto=IP_PROTOS.tcp) - self.reass_hairpinning(proto=IP_PROTOS.udp) - self.reass_hairpinning(proto=IP_PROTOS.icmp) - - def test_frag_out_of_order(self): - """ NAT44 translate fragments arriving out of order """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - self.frag_out_of_order(proto=IP_PROTOS.tcp) - self.frag_out_of_order(proto=IP_PROTOS.udp) - self.frag_out_of_order(proto=IP_PROTOS.icmp) - - def test_port_restricted(self): - """ Port restricted NAT44 (MAP-E CE) """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat_set_addr_and_port_alloc_alg(alg=1, - psid_offset=6, - psid_length=6, - psid=10) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=4567, dport=22)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg1.remote_ip4) - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(tcp.dport, 22) - self.assertNotEqual(tcp.sport, 4567) - self.assertEqual((tcp.sport >> 6) & 63, 10) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_port_range(self): - """ External address port range """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat_set_addr_and_port_alloc_alg(alg=2, - start_port=1025, - end_port=1027) - - pkts = [] - for port in range(0, 5): - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=1125 + port)) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(3) - for p in capture: - tcp = p[TCP] - self.assertGreaterEqual(tcp.sport, 1025) - self.assertLessEqual(tcp.sport, 1027) - - def test_ipfix_max_frags(self): - """ IPFIX logging maximum fragments pending reassembly exceeded """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat_set_reass(timeout=2, max_reass=1024, max_frag=1, - drop_frag=0) - self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n, - src_address=self.pg3.local_ip4n, - path_mtu=512, - template_interval=10) - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=1) - - data = b"A" * 4 + b"B" * 16 + b"C" * 3 - self.tcp_port_in = random.randint(1025, 65535) - pkts = self.create_stream_frag(self.pg0, - self.pg1.remote_ip4, - self.tcp_port_in, - 20, - data) - pkts.reverse() - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sleep(1) - self.vapi.ipfix_flush() - capture = self.pg3.get_capture(9) - ipfix = IPFIXDecoder() - # first load template - for p in capture: - self.assertTrue(p.haslayer(IPFIX)) - self.assertEqual(p[IP].src, self.pg3.local_ip4) - self.assertEqual(p[IP].dst, self.pg3.remote_ip4) - self.assertEqual(p[UDP].sport, self.ipfix_src_port) - self.assertEqual(p[UDP].dport, 4739) - self.assertEqual(p[IPFIX].observationDomainID, - self.ipfix_domain_id) - if p.haslayer(Template): - ipfix.add_template(p.getlayer(Template)) - # verify events in data set - for p in capture: - if p.haslayer(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_max_fragments_ip4(data, 1, - self.pg0.remote_ip4n) - - def test_multiple_outside_vrf(self): - """ Multiple outside VRF """ - vrf_id1 = 1 - vrf_id2 = 2 - - self.pg1.unconfig_ip4() - self.pg2.unconfig_ip4() - self.vapi.ip_table_add_del(is_add=1, table_id=vrf_id1) - self.vapi.ip_table_add_del(is_add=1, table_id=vrf_id2) - self.pg1.set_table_ip4(vrf_id1) - self.pg2.set_table_ip4(vrf_id2) - self.pg1.config_ip4() - self.pg2.config_ip4() - self.pg1.resolve_arp() - self.pg2.resolve_arp() - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg2.sw_if_index, - is_add=1) - - try: - # first VRF - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, self.nat_addr) - - pkts = self.create_stream_out(self.pg1, self.nat_addr) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - self.tcp_port_in = 60303 - self.udp_port_in = 60304 - self.icmp_id_in = 60305 - - # second VRF - pkts = self.create_stream_in(self.pg0, self.pg2) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg2.get_capture(len(pkts)) - self.verify_capture_out(capture, self.nat_addr) - - pkts = self.create_stream_out(self.pg2, self.nat_addr) - self.pg2.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - finally: - self.nat44_add_address(self.nat_addr, is_add=0) - self.pg1.unconfig_ip4() - self.pg2.unconfig_ip4() - self.pg1.set_table_ip4(0) - self.pg2.set_table_ip4(0) - self.pg1.config_ip4() - self.pg2.config_ip4() - self.pg1.resolve_arp() - self.pg2.resolve_arp() - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_session_timeout(self): - """ NAT44 session timeouts """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat_set_timeouts(udp=5, tcp_established=7440, - tcp_transitory=240, icmp=60) - - max_sessions = 1000 - pkts = [] - for i in range(0, max_sessions): - src = "10.10.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=src, dst=self.pg1.remote_ip4) / - UDP(sport=1025, dport=53)) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(max_sessions) - - sleep(6) - - pkts = [] - for i in range(0, max_sessions): - src = "10.10.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=src, dst=self.pg1.remote_ip4) / - UDP(sport=1026, dport=53)) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(max_sessions) - - nsessions = 0 - users = self.vapi.nat44_user_dump() - for user in users: - nsessions = nsessions + user.nsessions - self.assertLess(nsessions, 2 * max_sessions) - - def test_mss_clamping(self): - """ TCP MSS clamping """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="S", options=[('MSS', 1400)])) - - self.vapi.nat_set_mss_clamping(enable=1, mss_value=1000) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - # Negotiated MSS value greater than configured - changed - self.verify_mss_value(capture[0], 1000) - - self.vapi.nat_set_mss_clamping(enable=0, mss_value=1500) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - # MSS clamping disabled - negotiated MSS unchanged - self.verify_mss_value(capture[0], 1400) - - self.vapi.nat_set_mss_clamping(enable=1, mss_value=1500) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - # Negotiated MSS value smaller than configured - unchanged - self.verify_mss_value(capture[0], 1400) - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_ha_send(self): - """ Send HA session synchronization events (active) """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat_ha_set_listener(ip_address=self.pg3.local_ip4, - port=12345, - path_mtu=512) - self.vapi.nat_ha_set_failover(ip_address=self.pg3.remote_ip4, - port=12346, session_refresh_interval=10) - bind_layers(UDP, HANATStateSync, sport=12345) - - # create sessions - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - # active send HA events - self.vapi.nat_ha_flush() - stats = self.statistics.get_counter('/nat44/ha/add-event-send') - self.assertEqual(stats[0][0], 3) - capture = self.pg3.get_capture(1) - p = capture[0] - self.assert_packet_checksums_valid(p) - try: - ip = p[IP] - udp = p[UDP] - hanat = p[HANATStateSync] - except IndexError: - self.logger.error(ppp("Invalid packet:", p)) - raise - else: - self.assertEqual(ip.src, self.pg3.local_ip4) - self.assertEqual(ip.dst, self.pg3.remote_ip4) - self.assertEqual(udp.sport, 12345) - self.assertEqual(udp.dport, 12346) - self.assertEqual(hanat.version, 1) - self.assertEqual(hanat.thread_index, 0) - self.assertEqual(hanat.count, 3) - seq = hanat.sequence_number - for event in hanat.events: - self.assertEqual(event.event_type, 1) - self.assertEqual(event.in_addr, self.pg0.remote_ip4) - self.assertEqual(event.out_addr, self.nat_addr) - self.assertEqual(event.fib_index, 0) - - # ACK received events - ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / - UDP(sport=12346, dport=12345) / - HANATStateSync(sequence_number=seq, flags='ACK')) - self.pg3.add_stream(ack) - self.pg_start() - stats = self.statistics.get_counter('/nat44/ha/ack-recv') - self.assertEqual(stats[0][0], 1) - - # delete one session - self.pg_enable_capture(self.pg_interfaces) - self.vapi.nat44_del_session(address=self.pg0.remote_ip4n, - port=self.tcp_port_in, - protocol=IP_PROTOS.tcp, - flags=self.config_flags.NAT_IS_INSIDE) - self.vapi.nat_ha_flush() - stats = self.statistics.get_counter('/nat44/ha/del-event-send') - self.assertEqual(stats[0][0], 1) - capture = self.pg3.get_capture(1) - p = capture[0] - try: - hanat = p[HANATStateSync] - except IndexError: - self.logger.error(ppp("Invalid packet:", p)) - raise - else: - self.assertGreater(hanat.sequence_number, seq) - - # do not send ACK, active retry send HA event again - self.pg_enable_capture(self.pg_interfaces) - sleep(12) - stats = self.statistics.get_counter('/nat44/ha/retry-count') - self.assertEqual(stats[0][0], 3) - stats = self.statistics.get_counter('/nat44/ha/missed-count') - self.assertEqual(stats[0][0], 1) - capture = self.pg3.get_capture(3) - for packet in capture: - self.assertEqual(packet, p) - - # session counters refresh - pkts = self.create_stream_out(self.pg1) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(2) - self.vapi.nat_ha_flush() - stats = self.statistics.get_counter('/nat44/ha/refresh-event-send') - self.assertEqual(stats[0][0], 2) - capture = self.pg3.get_capture(1) - p = capture[0] - self.assert_packet_checksums_valid(p) - try: - ip = p[IP] - udp = p[UDP] - hanat = p[HANATStateSync] - except IndexError: - self.logger.error(ppp("Invalid packet:", p)) - raise - else: - self.assertEqual(ip.src, self.pg3.local_ip4) - self.assertEqual(ip.dst, self.pg3.remote_ip4) - self.assertEqual(udp.sport, 12345) - self.assertEqual(udp.dport, 12346) - self.assertEqual(hanat.version, 1) - self.assertEqual(hanat.count, 2) - seq = hanat.sequence_number - for event in hanat.events: - self.assertEqual(event.event_type, 3) - self.assertEqual(event.out_addr, self.nat_addr) - self.assertEqual(event.fib_index, 0) - self.assertEqual(event.total_pkts, 2) - self.assertGreater(event.total_bytes, 0) - - ack = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / - UDP(sport=12346, dport=12345) / - HANATStateSync(sequence_number=seq, flags='ACK')) - self.pg3.add_stream(ack) - self.pg_start() - stats = self.statistics.get_counter('/nat44/ha/ack-recv') - self.assertEqual(stats[0][0], 2) - - def test_ha_recv(self): - """ Receive HA session synchronization events (passive) """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat_ha_set_listener(ip_address=self.pg3.local_ip4, - port=12345, - path_mtu=512) - bind_layers(UDP, HANATStateSync, sport=12345) - - self.tcp_port_out = random.randint(1025, 65535) - self.udp_port_out = random.randint(1025, 65535) - - # send HA session add events to failover/passive - p = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / - UDP(sport=12346, dport=12345) / - HANATStateSync(sequence_number=1, events=[ - Event(event_type='add', protocol='tcp', - in_addr=self.pg0.remote_ip4, out_addr=self.nat_addr, - in_port=self.tcp_port_in, out_port=self.tcp_port_out, - eh_addr=self.pg1.remote_ip4, - ehn_addr=self.pg1.remote_ip4, - eh_port=self.tcp_external_port, - ehn_port=self.tcp_external_port, fib_index=0), - Event(event_type='add', protocol='udp', - in_addr=self.pg0.remote_ip4, out_addr=self.nat_addr, - in_port=self.udp_port_in, out_port=self.udp_port_out, - eh_addr=self.pg1.remote_ip4, - ehn_addr=self.pg1.remote_ip4, - eh_port=self.udp_external_port, - ehn_port=self.udp_external_port, fib_index=0)])) - - self.pg3.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - # receive ACK - capture = self.pg3.get_capture(1) - p = capture[0] - try: - hanat = p[HANATStateSync] - except IndexError: - self.logger.error(ppp("Invalid packet:", p)) - raise - else: - self.assertEqual(hanat.sequence_number, 1) - self.assertEqual(hanat.flags, 'ACK') - self.assertEqual(hanat.version, 1) - self.assertEqual(hanat.thread_index, 0) - stats = self.statistics.get_counter('/nat44/ha/ack-send') - self.assertEqual(stats[0][0], 1) - stats = self.statistics.get_counter('/nat44/ha/add-event-recv') - self.assertEqual(stats[0][0], 2) - users = self.statistics.get_counter('/nat44/total-users') - self.assertEqual(users[0][0], 1) - sessions = self.statistics.get_counter('/nat44/total-sessions') - self.assertEqual(sessions[0][0], 2) - users = self.vapi.nat44_user_dump() - self.assertEqual(len(users), 1) - self.assertEqual(str(users[0].ip_address), - self.pg0.remote_ip4) - # there should be 2 sessions created by HA - sessions = self.vapi.nat44_user_session_dump(users[0].ip_address, - users[0].vrf_id) - self.assertEqual(len(sessions), 2) - for session in sessions: - self.assertEqual(str(session.inside_ip_address), - self.pg0.remote_ip4) - self.assertEqual(str(session.outside_ip_address), - self.nat_addr) - self.assertIn(session.inside_port, - [self.tcp_port_in, self.udp_port_in]) - self.assertIn(session.outside_port, - [self.tcp_port_out, self.udp_port_out]) - self.assertIn(session.protocol, [IP_PROTOS.tcp, IP_PROTOS.udp]) - - # send HA session delete event to failover/passive - p = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / - UDP(sport=12346, dport=12345) / - HANATStateSync(sequence_number=2, events=[ - Event(event_type='del', protocol='udp', - in_addr=self.pg0.remote_ip4, out_addr=self.nat_addr, - in_port=self.udp_port_in, out_port=self.udp_port_out, - eh_addr=self.pg1.remote_ip4, - ehn_addr=self.pg1.remote_ip4, - eh_port=self.udp_external_port, - ehn_port=self.udp_external_port, fib_index=0)])) - - self.pg3.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - # receive ACK - capture = self.pg3.get_capture(1) - p = capture[0] - try: - hanat = p[HANATStateSync] - except IndexError: - self.logger.error(ppp("Invalid packet:", p)) - raise - else: - self.assertEqual(hanat.sequence_number, 2) - self.assertEqual(hanat.flags, 'ACK') - self.assertEqual(hanat.version, 1) - users = self.vapi.nat44_user_dump() - self.assertEqual(len(users), 1) - self.assertEqual(str(users[0].ip_address), - self.pg0.remote_ip4) - # now we should have only 1 session, 1 deleted by HA - sessions = self.vapi.nat44_user_session_dump(users[0].ip_address, - users[0].vrf_id) - self.assertEqual(len(sessions), 1) - stats = self.statistics.get_counter('/nat44/ha/del-event-recv') - self.assertEqual(stats[0][0], 1) - - stats = self.statistics.get_err_counter('/err/nat-ha/pkts-processed') - self.assertEqual(stats, 2) - - # send HA session refresh event to failover/passive - p = (Ether(dst=self.pg3.local_mac, src=self.pg3.remote_mac) / - IP(src=self.pg3.remote_ip4, dst=self.pg3.local_ip4) / - UDP(sport=12346, dport=12345) / - HANATStateSync(sequence_number=3, events=[ - Event(event_type='refresh', protocol='tcp', - in_addr=self.pg0.remote_ip4, out_addr=self.nat_addr, - in_port=self.tcp_port_in, out_port=self.tcp_port_out, - eh_addr=self.pg1.remote_ip4, - ehn_addr=self.pg1.remote_ip4, - eh_port=self.tcp_external_port, - ehn_port=self.tcp_external_port, fib_index=0, - total_bytes=1024, total_pkts=2)])) - self.pg3.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - # receive ACK - capture = self.pg3.get_capture(1) - p = capture[0] - try: - hanat = p[HANATStateSync] - except IndexError: - self.logger.error(ppp("Invalid packet:", p)) - raise - else: - self.assertEqual(hanat.sequence_number, 3) - self.assertEqual(hanat.flags, 'ACK') - self.assertEqual(hanat.version, 1) - users = self.vapi.nat44_user_dump() - self.assertEqual(len(users), 1) - self.assertEqual(str(users[0].ip_address), - self.pg0.remote_ip4) - sessions = self.vapi.nat44_user_session_dump(users[0].ip_address, - users[0].vrf_id) - self.assertEqual(len(sessions), 1) - session = sessions[0] - self.assertEqual(session.total_bytes, 1024) - self.assertEqual(session.total_pkts, 2) - stats = self.statistics.get_counter('/nat44/ha/refresh-event-recv') - self.assertEqual(stats[0][0], 1) - - stats = self.statistics.get_err_counter('/err/nat-ha/pkts-processed') - self.assertEqual(stats, 3) - - # send packet to test session created by HA - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - except IndexError: - self.logger.error(ppp("Invalid packet:", p)) - raise - else: - self.assertEqual(ip.src, self.pg1.remote_ip4) - self.assertEqual(ip.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.sport, self.tcp_external_port) - self.assertEqual(tcp.dport, self.tcp_port_in) - - def tearDown(self): - super(TestNAT44, self).tearDown() - self.clear_nat44() - self.vapi.cli("clear logging") - - def show_commands_at_teardown(self): - self.logger.info(self.vapi.cli("show nat44 addresses")) - self.logger.info(self.vapi.cli("show nat44 interfaces")) - self.logger.info(self.vapi.cli("show nat44 static mappings")) - self.logger.info(self.vapi.cli("show nat44 interface address")) - self.logger.info(self.vapi.cli("show nat44 sessions detail")) - self.logger.info(self.vapi.cli("show nat virtual-reassembly")) - self.logger.info(self.vapi.cli("show nat44 hash tables detail")) - self.logger.info(self.vapi.cli("show nat timeouts")) - self.logger.info( - self.vapi.cli("show nat addr-port-assignment-alg")) - self.logger.info(self.vapi.cli("show nat ha")) - - -class TestNAT44EndpointDependent(MethodHolder): - """ Endpoint-Dependent mapping and filtering test cases """ - - @classmethod - def setUpConstants(cls): - super(TestNAT44EndpointDependent, cls).setUpConstants() - cls.vpp_cmdline.extend(["nat", "{", "endpoint-dependent", "}"]) - - @classmethod - def setUpClass(cls): - super(TestNAT44EndpointDependent, cls).setUpClass() - cls.vapi.cli("set log class nat level debug") - try: - cls.tcp_port_in = 6303 - cls.tcp_port_out = 6303 - cls.udp_port_in = 6304 - cls.udp_port_out = 6304 - cls.icmp_id_in = 6305 - cls.icmp_id_out = 6305 - cls.nat_addr = '10.0.0.3' - cls.ipfix_src_port = 4739 - cls.ipfix_domain_id = 1 - cls.tcp_external_port = 80 - - cls.create_pg_interfaces(range(7)) - cls.interfaces = list(cls.pg_interfaces[0:3]) - - for i in cls.interfaces: - i.admin_up() - i.config_ip4() - i.resolve_arp() - - cls.pg0.generate_remote_hosts(3) - cls.pg0.configure_ipv4_neighbors() - - cls.pg3.admin_up() - - cls.pg4.generate_remote_hosts(2) - cls.pg4.config_ip4() - cls.vapi.sw_interface_add_del_address( - sw_if_index=cls.pg4.sw_if_index, - prefix=VppIpPrefix("10.0.0.1", 24).encode()) - - cls.pg4.admin_up() - cls.pg4.resolve_arp() - cls.pg4._remote_hosts[1]._ip4 = cls.pg4._remote_hosts[0]._ip4 - cls.pg4.resolve_arp() - - zero_ip4n = socket.inet_pton(socket.AF_INET, "0.0.0.0") - cls.vapi.ip_table_add_del(is_add=1, table_id=1) - - cls.pg5._local_ip4 = VppIpPrefix("10.1.1.1", - cls.pg5.local_ip4_prefix.len) - cls.pg5._remote_hosts[0]._ip4 = "10.1.1.2" - cls.pg5._remote_hosts[0]._ip4n = socket.inet_pton( - socket.AF_INET, cls.pg5.remote_ip4) - cls.pg5.set_table_ip4(1) - cls.pg5.config_ip4() - cls.pg5.admin_up() - r1 = VppIpRoute(cls, cls.pg5.remote_ip4, 32, - [VppRoutePath("0.0.0.0", - cls.pg5.sw_if_index)], - table_id=1, - register=False) - r1.add_vpp_config() - - cls.pg6._local_ip4 = VppIpPrefix("10.1.2.1", - cls.pg6.local_ip4_prefix.len) - cls.pg6._remote_hosts[0]._ip4 = "10.1.2.2" - cls.pg6._remote_hosts[0]._ip4n = socket.inet_pton( - socket.AF_INET, cls.pg6.remote_ip4) - cls.pg6.set_table_ip4(1) - cls.pg6.config_ip4() - cls.pg6.admin_up() - - r2 = VppIpRoute(cls, cls.pg6.remote_ip4, 32, - [VppRoutePath("0.0.0.0", - cls.pg6.sw_if_index)], - table_id=1, - register=False) - r3 = VppIpRoute(cls, cls.pg6.remote_ip4, 16, - [VppRoutePath("0.0.0.0", - 0xffffffff, - nh_table_id=1)], - table_id=0, - register=False) - r4 = VppIpRoute(cls, "0.0.0.0", 0, - [VppRoutePath("0.0.0.0", 0xffffffff, - nh_table_id=0)], - table_id=1, - register=False) - r5 = VppIpRoute(cls, "0.0.0.0", 0, - [VppRoutePath(cls.pg1.local_ip4, - cls.pg1.sw_if_index)], - register=False) - r2.add_vpp_config() - r3.add_vpp_config() - r4.add_vpp_config() - r5.add_vpp_config() - - cls.pg5.resolve_arp() - cls.pg6.resolve_arp() - - except Exception: - super(TestNAT44EndpointDependent, cls).tearDownClass() - raise - - @classmethod - def tearDownClass(cls): - super(TestNAT44EndpointDependent, cls).tearDownClass() - - def test_frag_in_order(self): - """ NAT44 translate fragments arriving in order """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.frag_in_order(proto=IP_PROTOS.tcp) - self.frag_in_order(proto=IP_PROTOS.udp) - self.frag_in_order(proto=IP_PROTOS.icmp) - - def test_frag_in_order_dont_translate(self): - """ NAT44 don't translate fragments arriving in order """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_forwarding_enable_disable(enable=True) - reas_cfg1 = self.vapi.nat_get_reass() - # this test was intermittently failing in some cases - # until we temporarily bump the reassembly timeouts - self.vapi.nat_set_reass(timeout=20, max_reass=1024, max_frag=5, - drop_frag=0) - self.frag_in_order(proto=IP_PROTOS.tcp, dont_translate=True) - # restore the reassembly timeouts - self.vapi.nat_set_reass(timeout=reas_cfg1.ip4_timeout, - max_reass=reas_cfg1.ip4_max_reass, - max_frag=reas_cfg1.ip4_max_frag, - drop_frag=reas_cfg1.ip4_drop_frag) - - def test_frag_out_of_order(self): - """ NAT44 translate fragments arriving out of order """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.frag_out_of_order(proto=IP_PROTOS.tcp) - self.frag_out_of_order(proto=IP_PROTOS.udp) - self.frag_out_of_order(proto=IP_PROTOS.icmp) - - def test_frag_out_of_order_dont_translate(self): - """ NAT44 don't translate fragments arriving out of order """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_forwarding_enable_disable(enable=True) - self.frag_out_of_order(proto=IP_PROTOS.tcp, dont_translate=True) - - def test_frag_in_order_in_plus_out(self): - """ in+out interface fragments in order """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - flags=flags, is_add=1) - - self.server = self.pg1.remote_hosts[0] - - self.server_in_addr = self.server.ip4 - self.server_out_addr = '11.11.11.11' - self.server_in_port = random.randint(1025, 65535) - self.server_out_port = random.randint(1025, 65535) - - self.nat44_add_address(self.server_out_addr) - - # add static mappings for server - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - proto=IP_PROTOS.icmp) - - self.vapi.nat_set_reass(timeout=10, max_reass=1024, max_frag=5, - drop_frag=0) - - self.frag_in_order_in_plus_out(proto=IP_PROTOS.tcp) - self.frag_in_order_in_plus_out(proto=IP_PROTOS.udp) - self.frag_in_order_in_plus_out(proto=IP_PROTOS.icmp) - - def test_frag_out_of_order_in_plus_out(self): - """ in+out interface fragments out of order """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - flags=flags, is_add=1) - - self.server = self.pg1.remote_hosts[0] - - self.server_in_addr = self.server.ip4 - self.server_out_addr = '11.11.11.11' - self.server_in_port = random.randint(1025, 65535) - self.server_out_port = random.randint(1025, 65535) - - self.nat44_add_address(self.server_out_addr) - - # add static mappings for server - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.server_in_addr, - self.server_out_addr, - proto=IP_PROTOS.icmp) - - self.vapi.nat_set_reass(timeout=10, max_reass=1024, max_frag=5, - drop_frag=0) - - self.frag_out_of_order_in_plus_out(proto=IP_PROTOS.tcp) - self.frag_out_of_order_in_plus_out(proto=IP_PROTOS.udp) - self.frag_out_of_order_in_plus_out(proto=IP_PROTOS.icmp) - - def test_reass_hairpinning(self): - """ NAT44 fragments hairpinning """ - self.server = self.pg0.remote_hosts[1] - self.host_in_port = random.randint(1025, 65535) - self.server_in_port = random.randint(1025, 65535) - self.server_out_port = random.randint(1025, 65535) - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - # add static mapping for server - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.tcp) - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr, - self.server_in_port, - self.server_out_port, - proto=IP_PROTOS.udp) - self.nat44_add_static_mapping(self.server.ip4, self.nat_addr) - - self.reass_hairpinning(proto=IP_PROTOS.tcp) - self.reass_hairpinning(proto=IP_PROTOS.udp) - self.reass_hairpinning(proto=IP_PROTOS.icmp) - - def test_dynamic(self): - """ NAT44 dynamic translation test """ - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - nat_config = self.vapi.nat_show_config() - self.assertEqual(1, nat_config.endpoint_dependent) - - # in2out - tcpn = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/TCP packets') - udpn = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/UDP packets') - icmpn = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/ICMP packets') - totaln = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/good in2out packets processed') - - 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) - - err = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/TCP packets') - self.assertEqual(err - tcpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/UDP packets') - self.assertEqual(err - udpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/ICMP packets') - self.assertEqual(err - icmpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-ed-in2out-slowpath/good in2out packets processed') - self.assertEqual(err - totaln, 3) - - # out2in - tcpn = self.statistics.get_err_counter( - '/err/nat44-ed-out2in/TCP packets') - udpn = self.statistics.get_err_counter( - '/err/nat44-ed-out2in/UDP packets') - icmpn = self.statistics.get_err_counter( - '/err/nat44-ed-out2in-slowpath/ICMP packets') - totaln = self.statistics.get_err_counter( - '/err/nat44-ed-out2in/good out2in packets processed') - - 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) - - err = self.statistics.get_err_counter( - '/err/nat44-ed-out2in/TCP packets') - self.assertEqual(err - tcpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-ed-out2in/UDP packets') - self.assertEqual(err - udpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-ed-out2in-slowpath/ICMP packets') - self.assertEqual(err - icmpn, 1) - err = self.statistics.get_err_counter( - '/err/nat44-ed-out2in/good out2in packets processed') - self.assertEqual(err - totaln, 2) - - users = self.statistics.get_counter('/nat44/total-users') - self.assertEqual(users[0][0], 1) - sessions = self.statistics.get_counter('/nat44/total-sessions') - self.assertEqual(sessions[0][0], 3) - - def test_forwarding(self): - """ NAT44 forwarding test """ - - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat44_forwarding_enable_disable(enable=1) - - real_ip = self.pg0.remote_ip4 - alias_ip = self.nat_addr - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_static_mapping(is_add=1, - local_ip_address=real_ip, - external_ip_address=alias_ip, - external_sw_if_index=0xFFFFFFFF, - flags=flags) - - try: - # in2out - static mapping match - - pkts = self.create_stream_out(self.pg1) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, same_port=True) - - # in2out - no static mapping match - - host0 = self.pg0.remote_hosts[0] - self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1] - try: - pkts = self.create_stream_out(self.pg1, - dst_ip=self.pg0.remote_ip4, - use_inside_ports=True) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4, - same_port=True) - finally: - self.pg0.remote_hosts[0] = host0 - - user = self.pg0.remote_hosts[1] - sessions = self.vapi.nat44_user_session_dump(user.ip4n, 0) - self.assertEqual(len(sessions), 3) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_EXT_HOST_VALID) - self.vapi.nat44_del_session( - address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=(self.config_flags.NAT_IS_INSIDE | - self.config_flags.NAT_IS_EXT_HOST_VALID), - ext_host_address=sessions[0].ext_host_address, - ext_host_port=sessions[0].ext_host_port) - sessions = self.vapi.nat44_user_session_dump(user.ip4n, 0) - self.assertEqual(len(sessions), 2) - - finally: - self.vapi.nat44_forwarding_enable_disable(enable=0) - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_static_mapping( - is_add=0, - local_ip_address=real_ip, - external_ip_address=alias_ip, - external_sw_if_index=0xFFFFFFFF, - flags=flags) - - def test_static_lb(self): - """ NAT44 local service load balancing """ - external_addr_n = self.nat_addr - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - - locals = [{'addr': server1.ip4n, - 'port': local_port, - 'probability': 70, - 'vrf_id': 0}, - {'addr': server2.ip4n, - 'port': local_port, - 'probability': 30, - 'vrf_id': 0}] - - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_add_del_lb_static_mapping( - is_add=1, - external_addr=external_addr_n, - external_port=external_port, - protocol=IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # from client to service - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - server = None - try: - ip = p[IP] - tcp = p[TCP] - self.assertIn(ip.dst, [server1.ip4, server2.ip4]) - if ip.dst == server1.ip4: - server = server1 - else: - server = server2 - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - p = (Ether(src=server.mac, dst=self.pg0.local_mac) / - IP(src=server.ip4, dst=self.pg1.remote_ip4) / - TCP(sport=local_port, dport=12345)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - sessions = self.vapi.nat44_user_session_dump(server.ip4n, 0) - self.assertEqual(len(sessions), 1) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_EXT_HOST_VALID) - self.vapi.nat44_del_session( - address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=(self.config_flags.NAT_IS_INSIDE | - self.config_flags.NAT_IS_EXT_HOST_VALID), - ext_host_address=sessions[0].ext_host_address, - ext_host_port=sessions[0].ext_host_port) - sessions = self.vapi.nat44_user_session_dump(server.ip4n, 0) - self.assertEqual(len(sessions), 0) - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_static_lb_multi_clients(self): - """ NAT44 local service load balancing - multiple clients""" - - external_addr = self.nat_addr - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - server3 = self.pg0.remote_hosts[2] - - locals = [{'addr': server1.ip4n, - 'port': local_port, - 'probability': 90, - 'vrf_id': 0}, - {'addr': server2.ip4n, - 'port': local_port, - 'probability': 10, - 'vrf_id': 0}] - - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_add_del_lb_static_mapping(is_add=1, - external_addr=external_addr, - external_port=external_port, - protocol=IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - server1_n = 0 - server2_n = 0 - clients = ip4_range(self.pg1.remote_ip4, 10, 50) - pkts = [] - for client in clients: - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=client, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - pkts.append(p) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for p in capture: - if p[IP].dst == server1.ip4: - server1_n += 1 - else: - server2_n += 1 - self.assertGreater(server1_n, server2_n) - - local = { - 'addr': server3.ip4n, - 'port': local_port, - 'probability': 20, - 'vrf_id': 0 - } - - # add new back-end - self.vapi.nat44_lb_static_mapping_add_del_local( - is_add=1, - external_addr=external_addr, - external_port=external_port, - local=local, - protocol=IP_PROTOS.tcp) - server1_n = 0 - server2_n = 0 - server3_n = 0 - clients = ip4_range(self.pg1.remote_ip4, 60, 110) - pkts = [] - for client in clients: - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=client, dst=self.nat_addr) / - TCP(sport=12346, dport=external_port)) - pkts.append(p) - self.assertGreater(len(pkts), 0) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for p in capture: - if p[IP].dst == server1.ip4: - server1_n += 1 - elif p[IP].dst == server2.ip4: - server2_n += 1 - else: - server3_n += 1 - self.assertGreater(server1_n, 0) - self.assertGreater(server2_n, 0) - self.assertGreater(server3_n, 0) - - local = { - 'addr': server2.ip4n, - 'port': local_port, - 'probability': 10, - 'vrf_id': 0 - } - - # remove one back-end - self.vapi.nat44_lb_static_mapping_add_del_local( - is_add=0, - external_addr=external_addr, - external_port=external_port, - local=local, - protocol=IP_PROTOS.tcp) - server1_n = 0 - server2_n = 0 - server3_n = 0 - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for p in capture: - if p[IP].dst == server1.ip4: - server1_n += 1 - elif p[IP].dst == server2.ip4: - server2_n += 1 - else: - server3_n += 1 - self.assertGreater(server1_n, 0) - self.assertEqual(server2_n, 0) - self.assertGreater(server3_n, 0) - - def test_static_lb_2(self): - """ NAT44 local service load balancing (asymmetrical rule) """ - external_addr = self.nat_addr - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - - locals = [{'addr': server1.ip4n, - 'port': local_port, - 'probability': 70, - 'vrf_id': 0}, - {'addr': server2.ip4n, - 'port': local_port, - 'probability': 30, - 'vrf_id': 0}] - - self.vapi.nat44_forwarding_enable_disable(enable=1) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags, - external_addr=external_addr, - external_port=external_port, - protocol=IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # from client to service - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - server = None - try: - ip = p[IP] - tcp = p[TCP] - self.assertIn(ip.dst, [server1.ip4, server2.ip4]) - if ip.dst == server1.ip4: - server = server1 - else: - server = server2 - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - p = (Ether(src=server.mac, dst=self.pg0.local_mac) / - IP(src=server.ip4, dst=self.pg1.remote_ip4) / - TCP(sport=local_port, dport=12345)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client to server (no translation) - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=server1.ip4) / - TCP(sport=12346, dport=local_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - server = None - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, server1.ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client (no translation) - p = (Ether(src=server1.mac, dst=self.pg0.local_mac) / - IP(src=server1.ip4, dst=self.pg1.remote_ip4) / - TCP(sport=local_port, dport=12346)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, server1.ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_lb_affinity(self): - """ NAT44 local service load balancing affinity """ - external_addr = self.nat_addr - external_port = 80 - local_port = 8080 - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - - locals = [{'addr': server1.ip4n, - 'port': local_port, - 'probability': 50, - 'vrf_id': 0}, - {'addr': server2.ip4n, - 'port': local_port, - 'probability': 50, - 'vrf_id': 0}] - - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_add_del_lb_static_mapping(is_add=1, - external_addr=external_addr, - external_port=external_port, - protocol=IP_PROTOS.tcp, - affinity=10800, - local_num=len(locals), - locals=locals) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=1025, dport=external_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - backend = capture[0][IP].dst - - sessions = self.vapi.nat44_user_session_dump(backend, 0) - self.assertEqual(len(sessions), 1) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_EXT_HOST_VALID) - self.vapi.nat44_del_session( - address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=(self.config_flags.NAT_IS_INSIDE | - self.config_flags.NAT_IS_EXT_HOST_VALID), - ext_host_address=sessions[0].ext_host_address, - ext_host_port=sessions[0].ext_host_port) - - pkts = [] - for port in range(1030, 1100): - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=port, dport=external_port)) - pkts.append(p) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for p in capture: - self.assertEqual(p[IP].dst, backend) - - def test_unknown_proto(self): - """ NAT44 translate packet with unknown protocol """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # in2out - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=20)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, self.nat_addr) - self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # out2in - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, self.pg1.remote_ip4) - self.assertEqual(packet[IP].dst, self.pg0.remote_ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_hairpinning_unknown_proto(self): - """ NAT44 translate packet with unknown protocol - hairpinning """ - host = self.pg0.remote_hosts[0] - server = self.pg0.remote_hosts[1] - host_in_port = 1234 - server_out_port = 8765 - server_nat_ip = "10.0.0.11" - - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # add static mapping for server - self.nat44_add_static_mapping(server.ip4, server_nat_ip) - - # host to server - p = (Ether(src=host.mac, dst=self.pg0.local_mac) / - IP(src=host.ip4, dst=server_nat_ip) / - TCP(sport=host_in_port, dport=server_out_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - p = (Ether(dst=self.pg0.local_mac, src=host.mac) / - IP(src=host.ip4, dst=server_nat_ip) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, self.nat_addr) - self.assertEqual(packet[IP].dst, server.ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # server to host - p = (Ether(dst=self.pg0.local_mac, src=server.mac) / - IP(src=server.ip4, dst=self.nat_addr) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, server_nat_ip) - self.assertEqual(packet[IP].dst, host.ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_output_feature_and_service(self): - """ NAT44 interface output feature and services """ - external_addr = '1.2.3.4' - external_port = 80 - local_port = 8080 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_ADDR_ONLY - self.vapi.nat44_add_del_identity_mapping( - ip_address=self.pg1.remote_ip4n, sw_if_index=0xFFFFFFFF, - flags=flags, is_add=1) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.nat44_add_static_mapping(self.pg0.remote_ip4, external_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - - # from client to service - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=external_addr) / - TCP(sport=12345, dport=external_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=local_port, dport=12345)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, external_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from local network host to external network - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # from external network back to local network host - pkts = self.create_stream_out(self.pg1) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - def test_output_feature_and_service2(self): - """ NAT44 interface output feature and service host direct access """ - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - - # session initiated from service host - translate - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - - pkts = self.create_stream_out(self.pg1) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - # session initiated from remote host - do not translate - self.tcp_port_in = 60303 - self.udp_port_in = 60304 - self.icmp_id_in = 60305 - pkts = self.create_stream_out(self.pg1, - self.pg0.remote_ip4, - use_inside_ports=True) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4, - same_port=True) - - def test_output_feature_and_service3(self): - """ NAT44 interface output feature and DST NAT """ - external_addr = '1.2.3.4' - external_port = 80 - local_port = 8080 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.nat44_add_static_mapping(self.pg1.remote_ip4, external_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=external_addr) / - TCP(sport=12345, dport=external_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg0.remote_ip4) - self.assertEqual(tcp.sport, 12345) - self.assertEqual(ip.dst, self.pg1.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) / - TCP(sport=local_port, dport=12345)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, external_addr) - self.assertEqual(tcp.sport, external_port) - self.assertEqual(ip.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, 12345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_next_src_nat(self): - """ On way back forward packet to nat44-in2out node. """ - twice_nat_addr = '10.0.1.3' - external_port = 80 - local_port = 8080 - post_twice_nat_port = 0 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(twice_nat_addr, twice_nat=1) - flags = (self.config_flags.NAT_IS_OUT2IN_ONLY | - self.config_flags.NAT_IS_SELF_TWICE_NAT) - self.nat44_add_static_mapping(self.pg6.remote_ip4, self.pg1.remote_ip4, - local_port, external_port, - proto=IP_PROTOS.tcp, vrf_id=1, - flags=flags) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg6.sw_if_index, - is_add=1) - - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=12345, dport=external_port)) - self.pg6.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, twice_nat_addr) - self.assertNotEqual(tcp.sport, 12345) - post_twice_nat_port = tcp.sport - self.assertEqual(ip.dst, self.pg6.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=twice_nat_addr) / - TCP(sport=local_port, dport=post_twice_nat_port)) - self.pg6.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg1.remote_ip4) - self.assertEqual(tcp.sport, external_port) - self.assertEqual(ip.dst, self.pg6.remote_ip4) - self.assertEqual(tcp.dport, 12345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def twice_nat_common(self, self_twice_nat=False, same_pg=False, lb=False, - client_id=None): - twice_nat_addr = '10.0.1.3' - - port_in = 8080 - if lb: - if not same_pg: - port_in1 = port_in - port_in2 = port_in - else: - port_in1 = port_in + 1 - port_in2 = port_in + 2 - - port_out = 80 - eh_port_out = 4567 - - server1 = self.pg0.remote_hosts[0] - server2 = self.pg0.remote_hosts[1] - if lb and same_pg: - server2 = server1 - if not lb: - server = server1 - - pg0 = self.pg0 - if same_pg: - pg1 = self.pg0 - else: - pg1 = self.pg1 - - eh_translate = ((not self_twice_nat) or (not lb and same_pg) or - client_id == 1) - - self.nat44_add_address(self.nat_addr) - self.nat44_add_address(twice_nat_addr, twice_nat=1) - - flags = 0 - if self_twice_nat: - flags |= self.config_flags.NAT_IS_SELF_TWICE_NAT - else: - flags |= self.config_flags.NAT_IS_TWICE_NAT - - if not lb: - self.nat44_add_static_mapping(pg0.remote_ip4, self.nat_addr, - port_in, port_out, - proto=IP_PROTOS.tcp, - flags=flags) - else: - locals = [{'addr': server1.ip4n, - 'port': port_in1, - 'probability': 50, - 'vrf_id': 0}, - {'addr': server2.ip4n, - 'port': port_in2, - 'probability': 50, - 'vrf_id': 0}] - out_addr = self.nat_addr - - self.vapi.nat44_add_del_lb_static_mapping(is_add=1, flags=flags, - external_addr=out_addr, - external_port=port_out, - protocol=IP_PROTOS.tcp, - local_num=len(locals), - locals=locals) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=pg1.sw_if_index, - is_add=1) - - if same_pg: - if not lb: - client = server - else: - assert client_id is not None - if client_id == 1: - client = self.pg0.remote_hosts[0] - elif client_id == 2: - client = self.pg0.remote_hosts[1] - else: - client = pg1.remote_hosts[0] - p = (Ether(src=pg1.remote_mac, dst=pg1.local_mac) / - IP(src=client.ip4, dst=self.nat_addr) / - TCP(sport=eh_port_out, dport=port_out)) - pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - if lb: - if ip.dst == server1.ip4: - server = server1 - port_in = port_in1 - else: - server = server2 - port_in = port_in2 - self.assertEqual(ip.dst, server.ip4) - if lb and same_pg: - self.assertIn(tcp.dport, [port_in1, port_in2]) - else: - self.assertEqual(tcp.dport, port_in) - if eh_translate: - self.assertEqual(ip.src, twice_nat_addr) - self.assertNotEqual(tcp.sport, eh_port_out) - else: - self.assertEqual(ip.src, client.ip4) - self.assertEqual(tcp.sport, eh_port_out) - eh_addr_in = ip.src - eh_port_in = tcp.sport - saved_port_in = tcp.dport - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - p = (Ether(src=server.mac, dst=pg0.local_mac) / - IP(src=server.ip4, dst=eh_addr_in) / - TCP(sport=saved_port_in, dport=eh_port_in)) - pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, client.ip4) - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(tcp.dport, eh_port_out) - self.assertEqual(tcp.sport, port_out) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - if eh_translate: - sessions = self.vapi.nat44_user_session_dump(server.ip4n, 0) - self.assertEqual(len(sessions), 1) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_EXT_HOST_VALID) - self.assertTrue(sessions[0].flags & - self.config_flags.NAT_IS_TWICE_NAT) - self.logger.info(self.vapi.cli("show nat44 sessions detail")) - self.vapi.nat44_del_session( - address=sessions[0].inside_ip_address, - port=sessions[0].inside_port, - protocol=sessions[0].protocol, - flags=(self.config_flags.NAT_IS_INSIDE | - self.config_flags.NAT_IS_EXT_HOST_VALID), - ext_host_address=sessions[0].ext_host_nat_address, - ext_host_port=sessions[0].ext_host_nat_port) - sessions = self.vapi.nat44_user_session_dump(server.ip4n, 0) - self.assertEqual(len(sessions), 0) - - def test_twice_nat(self): - """ Twice NAT44 """ - self.twice_nat_common() - - def test_self_twice_nat_positive(self): - """ Self Twice NAT44 (positive test) """ - self.twice_nat_common(self_twice_nat=True, same_pg=True) - - def test_self_twice_nat_negative(self): - """ Self Twice NAT44 (negative test) """ - self.twice_nat_common(self_twice_nat=True) - - def test_twice_nat_lb(self): - """ Twice NAT44 local service load balancing """ - self.twice_nat_common(lb=True) - - def test_self_twice_nat_lb_positive(self): - """ Self Twice NAT44 local service load balancing (positive test) """ - self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True, - client_id=1) - - def test_self_twice_nat_lb_negative(self): - """ Self Twice NAT44 local service load balancing (negative test) """ - self.twice_nat_common(lb=True, self_twice_nat=True, same_pg=True, - client_id=2) - - def test_twice_nat_interface_addr(self): - """ Acquire twice NAT44 addresses from interface """ - flags = self.config_flags.NAT_IS_TWICE_NAT - self.vapi.nat44_add_del_interface_addr( - is_add=1, - sw_if_index=self.pg3.sw_if_index, - flags=flags) - - # no address in NAT pool - adresses = self.vapi.nat44_address_dump() - self.assertEqual(0, len(adresses)) - - # configure interface address and check NAT address pool - self.pg3.config_ip4() - adresses = self.vapi.nat44_address_dump() - self.assertEqual(1, len(adresses)) - self.assertEqual(str(adresses[0].ip_address), - self.pg3.local_ip4) - self.assertEqual(adresses[0].flags, flags) - - # remove interface address and check NAT address pool - self.pg3.unconfig_ip4() - adresses = self.vapi.nat44_address_dump() - self.assertEqual(0, len(adresses)) - - def test_tcp_close(self): - """ Close TCP session from inside network - output feature """ - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.pg1.local_ip4) - twice_nat_addr = '10.0.1.3' - service_ip = '192.168.16.150' - self.nat44_add_address(twice_nat_addr, twice_nat=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - flags = (self.config_flags.NAT_IS_OUT2IN_ONLY | - self.config_flags.NAT_IS_TWICE_NAT) - self.nat44_add_static_mapping(self.pg0.remote_ip4, - service_ip, - 80, - 80, - proto=IP_PROTOS.tcp, - flags=flags) - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0) - start_sessnum = len(sessions) - - # SYN packet out->in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=service_ip) / - TCP(sport=33898, dport=80, flags="S")) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - tcp_port = p[TCP].sport - - # SYN + ACK packet in->out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) / - TCP(sport=80, dport=tcp_port, flags="SA")) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # ACK packet out->in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=service_ip) / - TCP(sport=33898, dport=80, flags="A")) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - # FIN packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) / - TCP(sport=80, dport=tcp_port, flags="FA", seq=100, ack=300)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # FIN+ACK packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=service_ip) / - TCP(sport=33898, dport=80, flags="FA", seq=300, ack=101)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - # ACK packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) / - TCP(sport=80, dport=tcp_port, flags="A", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, - 0) - self.assertEqual(len(sessions) - start_sessnum, 0) - - def test_tcp_session_close_in(self): - """ Close TCP session from inside network """ - self.tcp_port_out = 10505 - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_TWICE_NAT - self.nat44_add_static_mapping(self.pg0.remote_ip4, - self.nat_addr, - self.tcp_port_in, - self.tcp_port_out, - proto=IP_PROTOS.tcp, - flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0) - start_sessnum = len(sessions) - - self.initiate_tcp_session(self.pg0, self.pg1) - - # FIN packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="FA", seq=100, ack=300)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - pkts = [] - - # ACK packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="A", seq=300, ack=101)) - pkts.append(p) - - # FIN packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="FA", seq=300, ack=101)) - pkts.append(p) - - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(2) - - # ACK packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="A", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, - 0) - self.assertEqual(len(sessions) - start_sessnum, 0) - - def test_tcp_session_close_out(self): - """ Close TCP session from outside network """ - self.tcp_port_out = 10505 - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_TWICE_NAT - self.nat44_add_static_mapping(self.pg0.remote_ip4, - self.nat_addr, - self.tcp_port_in, - self.tcp_port_out, - proto=IP_PROTOS.tcp, - flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0) - start_sessnum = len(sessions) - - self.initiate_tcp_session(self.pg0, self.pg1) - - # FIN packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="FA", seq=100, ack=300)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - # FIN+ACK packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="FA", seq=300, ack=101)) - - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # ACK packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="A", seq=101, ack=301)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, - 0) - self.assertEqual(len(sessions) - start_sessnum, 0) - - def test_tcp_session_close_simultaneous(self): - """ Close TCP session from inside network """ - self.tcp_port_out = 10505 - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_TWICE_NAT - self.nat44_add_static_mapping(self.pg0.remote_ip4, - self.nat_addr, - self.tcp_port_in, - self.tcp_port_out, - proto=IP_PROTOS.tcp, - flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0) - start_sessnum = len(sessions) - - self.initiate_tcp_session(self.pg0, self.pg1) - - # FIN packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="FA", seq=100, ack=300)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # FIN packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="FA", seq=300, ack=100)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - # ACK packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="A", seq=101, ack=301)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # ACK packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="A", seq=301, ack=101)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, - 0) - self.assertEqual(len(sessions) - start_sessnum, 0) - - def test_one_armed_nat44_static(self): - """ One armed NAT44 and 1:1 NAPT asymmetrical rule """ - remote_host = self.pg4.remote_hosts[0] - local_host = self.pg4.remote_hosts[1] - external_port = 80 - local_port = 8080 - eh_port_in = 0 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr, twice_nat=1) - flags = (self.config_flags.NAT_IS_OUT2IN_ONLY | - self.config_flags.NAT_IS_TWICE_NAT) - self.nat44_add_static_mapping(local_host.ip4, self.nat_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg4.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg4.sw_if_index, - flags=flags, is_add=1) - - # from client to service - p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / - IP(src=remote_host.ip4, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - self.pg4.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg4.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, local_host.ip4) - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(tcp.dport, local_port) - self.assertNotEqual(tcp.sport, 12345) - eh_port_in = tcp.sport - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) / - IP(src=local_host.ip4, dst=self.nat_addr) / - TCP(sport=local_port, dport=eh_port_in)) - self.pg4.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg4.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(ip.dst, remote_host.ip4) - self.assertEqual(tcp.sport, external_port) - self.assertEqual(tcp.dport, 12345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_static_with_port_out2(self): - """ 1:1 NAPT asymmetrical rule """ - - external_port = 80 - local_port = 8080 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr, - local_port, external_port, - proto=IP_PROTOS.tcp, flags=flags) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # from client to service - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=12345, dport=external_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # ICMP error - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - ICMP(type=11) / capture[0][IP]) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - self.assertEqual(p[IP].src, self.nat_addr) - inner = p[IPerror] - self.assertEqual(inner.dst, self.nat_addr) - self.assertEqual(inner[TCPerror].dport, external_port) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=local_port, dport=12345)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # ICMP error - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - ICMP(type=11) / capture[0][IP]) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - self.assertEqual(p[IP].dst, self.pg0.remote_ip4) - inner = p[IPerror] - self.assertEqual(inner.src, self.pg0.remote_ip4) - self.assertEqual(inner[TCPerror].sport, local_port) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client to server (no translation) - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) / - TCP(sport=12346, dport=local_port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client (no translation) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=local_port, dport=12346)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg0.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - def test_output_feature(self): - """ NAT44 interface output feature (in2out postrouting) """ - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - - # in2out - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture) - - # 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_multiple_vrf(self): - """ Multiple VRF setup """ - external_addr = '1.2.3.4' - external_port = 80 - local_port = 8080 - port = 0 - - self.vapi.nat44_forwarding_enable_disable(enable=1) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_output_feature( - is_add=1, - sw_if_index=self.pg1.sw_if_index) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg5.sw_if_index, - is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg5.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg6.sw_if_index, - is_add=1) - flags = self.config_flags.NAT_IS_OUT2IN_ONLY - self.nat44_add_static_mapping(self.pg5.remote_ip4, external_addr, - local_port, external_port, vrf_id=1, - proto=IP_PROTOS.tcp, flags=flags) - self.nat44_add_static_mapping( - self.pg0.remote_ip4, - external_sw_if_index=self.pg0.sw_if_index, - local_port=local_port, - vrf_id=0, - external_port=external_port, - proto=IP_PROTOS.tcp, - flags=flags - ) - - # from client to service (both VRF1) - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=external_addr) / - TCP(sport=12345, dport=external_port)) - self.pg6.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service back to client (both VRF1) - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12345)) - self.pg5.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, external_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # dynamic NAT from VRF1 to VRF0 (output-feature) - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=2345, dport=22)) - self.pg5.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.nat_addr) - self.assertNotEqual(tcp.sport, 2345) - self.assert_packet_checksums_valid(p) - port = tcp.sport - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=22, dport=port)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, 2345) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client VRF1 to service VRF0 - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=self.pg0.local_ip4) / - TCP(sport=12346, dport=external_port)) - self.pg6.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg0.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service VRF0 back to client VRF1 - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12346)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg0.local_ip4) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client VRF0 to service VRF1 - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=external_addr) / - TCP(sport=12347, dport=external_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from service VRF1 back to client VRF0 - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) / - TCP(sport=local_port, dport=12347)) - self.pg5.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, external_addr) - self.assertEqual(tcp.sport, external_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client to server (both VRF1, no translation) - p = (Ether(src=self.pg6.remote_mac, dst=self.pg6.local_mac) / - IP(src=self.pg6.remote_ip4, dst=self.pg5.remote_ip4) / - TCP(sport=12348, dport=local_port)) - self.pg6.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from server back to client (both VRF1, no translation) - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12348)) - self.pg5.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg5.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client VRF1 to server VRF0 (no translation) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12349)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg0.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from server VRF0 back to client VRF1 (no translation) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg6.remote_ip4) / - TCP(sport=local_port, dport=12349)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg6.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg0.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from client VRF0 to server VRF1 (no translation) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg5.remote_ip4) / - TCP(sport=12344, dport=local_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg5.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.dst, self.pg5.remote_ip4) - self.assertEqual(tcp.dport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # from server VRF1 back to client VRF0 (no translation) - p = (Ether(src=self.pg5.remote_mac, dst=self.pg5.local_mac) / - IP(src=self.pg5.remote_ip4, dst=self.pg0.remote_ip4) / - TCP(sport=local_port, dport=12344)) - self.pg5.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg5.remote_ip4) - self.assertEqual(tcp.sport, local_port) - self.assert_packet_checksums_valid(p) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_session_timeout(self): - """ NAT44 session timeouts """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, - tcp_transitory=240, icmp=5) - - max_sessions = 1000 - pkts = [] - for i in range(0, max_sessions): - src = "10.10.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=src, dst=self.pg1.remote_ip4) / - ICMP(id=1025, type='echo-request')) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(max_sessions) - - sleep(10) - - pkts = [] - for i in range(0, max_sessions): - src = "10.11.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=src, dst=self.pg1.remote_ip4) / - ICMP(id=1026, type='echo-request')) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(max_sessions) - - nsessions = 0 - users = self.vapi.nat44_user_dump() - for user in users: - nsessions = nsessions + user.nsessions - self.assertLess(nsessions, 2 * max_sessions) - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_session_rst_timeout(self): - """ NAT44 session RST timeouts """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, - tcp_transitory=5, icmp=60) - - self.initiate_tcp_session(self.pg0, self.pg1) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="R")) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - sleep(6) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in + 1, dport=self.tcp_external_port + 1, - flags="S")) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - nsessions = 0 - users = self.vapi.nat44_user_dump() - self.assertEqual(len(users), 1) - self.assertEqual(str(users[0].ip_address), - self.pg0.remote_ip4) - self.assertEqual(users[0].nsessions, 1) - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_session_limit_per_user(self): - """ Maximum sessions per user limit """ - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.set_ipfix_exporter(collector_address=self.pg2.remote_ip4n, - src_address=self.pg2.local_ip4n, - path_mtu=512, - template_interval=10) - self.vapi.nat_set_timeouts(udp=5, tcp_established=7440, - tcp_transitory=240, icmp=60) - - # get maximum number of translations per user - nat44_config = self.vapi.nat_show_config() - - pkts = [] - for port in range(0, nat44_config.max_translations_per_user): - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - UDP(sport=1025 + port, dport=1025 + port)) - pkts.append(p) - - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=1) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - UDP(sport=3001, dport=3002)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.assert_nothing_captured() - - # verify IPFIX logging - self.vapi.ipfix_flush() - sleep(1) - capture = self.pg2.get_capture(10) - ipfix = IPFIXDecoder() - # first load template - for p in capture: - self.assertTrue(p.haslayer(IPFIX)) - if p.haslayer(Template): - ipfix.add_template(p.getlayer(Template)) - # verify events in data set - for p in capture: - if p.haslayer(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_max_entries_per_user( - data, - nat44_config.max_translations_per_user, - self.pg0.remote_ip4n) - - sleep(6) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - UDP(sport=3001, dport=3002)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - def test_syslog_sess(self): - """ Test syslog session creation and deletion """ - self.vapi.syslog_set_filter( - self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_INFO) - self.vapi.syslog_set_sender(self.pg2.local_ip4n, self.pg2.remote_ip4n) - self.nat44_add_address(self.nat_addr) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - self.tcp_port_out = capture[0][TCP].sport - capture = self.pg2.get_capture(1) - self.verify_syslog_sess(capture[0][Raw].load) - - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.nat44_add_address(self.nat_addr, is_add=0) - capture = self.pg2.get_capture(1) - self.verify_syslog_sess(capture[0][Raw].load, False) - - def tearDown(self): - super(TestNAT44EndpointDependent, self).tearDown() - if not self.vpp_dead: - self.clear_nat44() - self.vapi.cli("clear logging") - - def show_commands_at_teardown(self): - self.logger.info(self.vapi.cli("show nat44 addresses")) - self.logger.info(self.vapi.cli("show nat44 interfaces")) - self.logger.info(self.vapi.cli("show nat44 static mappings")) - self.logger.info(self.vapi.cli("show nat44 interface address")) - self.logger.info(self.vapi.cli("show nat44 sessions detail")) - self.logger.info(self.vapi.cli("show nat44 hash tables detail")) - self.logger.info(self.vapi.cli("show nat timeouts")) - - -class TestNAT44Out2InDPO(MethodHolder): - """ NAT44 Test Cases using out2in DPO """ - - @classmethod - def setUpConstants(cls): - super(TestNAT44Out2InDPO, cls).setUpConstants() - cls.vpp_cmdline.extend(["nat", "{", "out2in dpo", "}"]) - - @classmethod - def setUpClass(cls): - super(TestNAT44Out2InDPO, cls).setUpClass() - cls.vapi.cli("set log class nat level debug") - - try: - cls.tcp_port_in = 6303 - cls.tcp_port_out = 6303 - cls.udp_port_in = 6304 - cls.udp_port_out = 6304 - cls.icmp_id_in = 6305 - cls.icmp_id_out = 6305 - cls.nat_addr = '10.0.0.3' - cls.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() - - except Exception: - super(TestNAT44Out2InDPO, cls).tearDownClass() - raise - - @classmethod - def tearDownClass(cls): - super(TestNAT44Out2InDPO, cls).tearDownClass() - - def configure_xlat(self): - self.dst_ip6_pfx = '1:2:3::' - self.dst_ip6_pfx_n = socket.inet_pton(socket.AF_INET6, - self.dst_ip6_pfx) - self.dst_ip6_pfx_len = 96 - self.src_ip6_pfx = '4:5:6::' - self.src_ip6_pfx_n = socket.inet_pton(socket.AF_INET6, - self.src_ip6_pfx) - self.src_ip6_pfx_len = 96 - self.vapi.map_add_domain(self.dst_ip6_pfx_n, self.dst_ip6_pfx_len, - self.src_ip6_pfx_n, self.src_ip6_pfx_len, - '\x00\x00\x00\x00', 0) - - @unittest.skip('Temporary disabled') - def test_464xlat_ce(self): - """ Test 464XLAT CE with NAT44 """ - - nat_config = self.vapi.nat_show_config() - self.assertEqual(1, nat_config.out2in_dpo) - - self.configure_xlat() - - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_add_del_address_range(first_ip_address=self.nat_addr_n, - last_ip_address=self.nat_addr_n, - vrf_id=0xFFFFFFFF, is_add=1) - - out_src_ip6 = self.compose_ip6(self.dst_ip4, self.dst_ip6_pfx, - self.dst_ip6_pfx_len) - out_dst_ip6 = self.compose_ip6(self.nat_addr, self.src_ip6_pfx, - self.src_ip6_pfx_len) - - try: - pkts = self.create_stream_in(self.pg0, self.pg1, self.dst_ip4) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out_ip6(capture, nat_ip=out_dst_ip6, - dst_ip=out_src_ip6) - - pkts = self.create_stream_out_ip6(self.pg1, out_src_ip6, - out_dst_ip6) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - finally: - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags) - self.vapi.nat44_add_del_address_range( - first_ip_address=self.nat_addr_n, - last_ip_address=self.nat_addr_n, - vrf_id=0xFFFFFFFF) - - @unittest.skip('Temporary disabled') - def test_464xlat_ce_no_nat(self): - """ Test 464XLAT CE without NAT44 """ - - self.configure_xlat() - - out_src_ip6 = self.compose_ip6(self.dst_ip4, self.dst_ip6_pfx, - self.dst_ip6_pfx_len) - out_dst_ip6 = self.compose_ip6(self.pg0.remote_ip4, self.src_ip6_pfx, - self.src_ip6_pfx_len) - - pkts = self.create_stream_in(self.pg0, self.pg1, self.dst_ip4) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out_ip6(capture, dst_ip=out_src_ip6, - nat_ip=out_dst_ip6, same_port=True) - - pkts = self.create_stream_out_ip6(self.pg1, out_src_ip6, out_dst_ip6) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - -class TestDeterministicNAT(MethodHolder): - """ Deterministic NAT Test Cases """ - - @classmethod - def setUpConstants(cls): - super(TestDeterministicNAT, cls).setUpConstants() - cls.vpp_cmdline.extend(["nat", "{", "deterministic", "}"]) - - @classmethod - def setUpClass(cls): - super(TestDeterministicNAT, cls).setUpClass() - cls.vapi.cli("set log class nat level debug") - - try: - cls.tcp_port_in = 6303 - cls.tcp_external_port = 6303 - cls.udp_port_in = 6304 - cls.udp_external_port = 6304 - cls.icmp_id_in = 6305 - cls.nat_addr = '10.0.0.3' - - cls.create_pg_interfaces(range(3)) - cls.interfaces = list(cls.pg_interfaces) - - for i in cls.interfaces: - i.admin_up() - i.config_ip4() - i.resolve_arp() - - cls.pg0.generate_remote_hosts(2) - cls.pg0.configure_ipv4_neighbors() - - except Exception: - super(TestDeterministicNAT, cls).tearDownClass() - raise - - @classmethod - def tearDownClass(cls): - super(TestDeterministicNAT, cls).tearDownClass() - - def create_stream_in(self, in_if, out_if, ttl=64): - """ - Create packet stream for inside network - - :param in_if: Inside interface - :param out_if: Outside interface - :param ttl: TTL of generated packets - """ - pkts = [] - # TCP - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port)) - pkts.append(p) - - # UDP - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) / - UDP(sport=self.udp_port_in, dport=self.udp_external_port)) - pkts.append(p) - - # ICMP - p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) / - IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) / - ICMP(id=self.icmp_id_in, type='echo-request')) - pkts.append(p) - - return pkts - - def create_stream_out(self, out_if, dst_ip=None, ttl=64): - """ - Create packet stream for outside network - - :param out_if: Outside interface - :param dst_ip: Destination IP address (Default use global NAT address) - :param ttl: TTL of generated packets - """ - if dst_ip is None: - dst_ip = self.nat_addr - pkts = [] - # TCP - p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / - IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / - TCP(dport=self.tcp_port_out, sport=self.tcp_external_port)) - pkts.append(p) - - # UDP - p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / - IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / - UDP(dport=self.udp_port_out, sport=self.udp_external_port)) - pkts.append(p) - - # ICMP - p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) / - IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) / - ICMP(id=self.icmp_external_id, type='echo-reply')) - pkts.append(p) - - return pkts - - def verify_capture_out(self, capture, nat_ip=None): - """ - 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) - """ - if nat_ip is None: - nat_ip = self.nat_addr - for packet in capture: - try: - self.assertEqual(packet[IP].src, nat_ip) - if packet.haslayer(TCP): - self.tcp_port_out = packet[TCP].sport - elif packet.haslayer(UDP): - self.udp_port_out = packet[UDP].sport - else: - self.icmp_external_id = packet[ICMP].id - except: - self.logger.error(ppp("Unexpected or invalid packet " - "(outside network):", packet)) - raise - - def test_deterministic_mode(self): - """ NAT plugin run deterministic mode """ - in_addr = '172.16.255.0' - out_addr = '172.17.255.50' - in_addr_t = '172.16.255.20' - in_plen = 24 - out_plen = 32 - - nat_config = self.vapi.nat_show_config() - self.assertEqual(1, nat_config.deterministic) - - self.vapi.nat_det_add_del_map(is_add=1, in_addr=in_addr, - in_plen=in_plen, out_addr=out_addr, - out_plen=out_plen) - - rep1 = self.vapi.nat_det_forward(in_addr_t) - self.assertEqual(str(rep1.out_addr), out_addr) - rep2 = self.vapi.nat_det_reverse(rep1.out_port_hi, out_addr) - - self.assertEqual(str(rep2.in_addr), in_addr_t) - - deterministic_mappings = self.vapi.nat_det_map_dump() - self.assertEqual(len(deterministic_mappings), 1) - dsm = deterministic_mappings[0] - self.assertEqual(in_addr, str(dsm.in_addr)) - self.assertEqual(in_plen, dsm.in_plen) - self.assertEqual(out_addr, str(dsm.out_addr)) - self.assertEqual(out_plen, dsm.out_plen) - - self.clear_nat_det() - deterministic_mappings = self.vapi.nat_det_map_dump() - self.assertEqual(len(deterministic_mappings), 0) - - def test_set_timeouts(self): - """ Set deterministic NAT timeouts """ - timeouts_before = self.vapi.nat_get_timeouts() - - self.vapi.nat_set_timeouts( - udp=timeouts_before.udp + 10, - tcp_established=timeouts_before.tcp_established + 10, - tcp_transitory=timeouts_before.tcp_transitory + 10, - icmp=timeouts_before.icmp + 10) - - timeouts_after = self.vapi.nat_get_timeouts() - - self.assertNotEqual(timeouts_before.udp, timeouts_after.udp) - self.assertNotEqual(timeouts_before.icmp, timeouts_after.icmp) - self.assertNotEqual(timeouts_before.tcp_established, - timeouts_after.tcp_established) - self.assertNotEqual(timeouts_before.tcp_transitory, - timeouts_after.tcp_transitory) - - def test_det_in(self): - """ Deterministic NAT translation test (TCP, UDP, ICMP) """ - - nat_ip = "10.0.0.10" - - self.vapi.nat_det_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4n, - in_plen=32, - out_addr=socket.inet_aton(nat_ip), - out_plen=32) - - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # in2out - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip) - - # out2in - pkts = self.create_stream_out(self.pg1, nat_ip) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in(capture, self.pg0) - - # session dump test - sessions = self.vapi.nat_det_session_dump(self.pg0.remote_ip4n) - self.assertEqual(len(sessions), 3) - - # TCP session - s = sessions[0] - self.assertEqual(str(s.ext_addr), self.pg1.remote_ip4) - self.assertEqual(s.in_port, self.tcp_port_in) - self.assertEqual(s.out_port, self.tcp_port_out) - self.assertEqual(s.ext_port, self.tcp_external_port) - - # UDP session - s = sessions[1] - self.assertEqual(str(s.ext_addr), self.pg1.remote_ip4) - self.assertEqual(s.in_port, self.udp_port_in) - self.assertEqual(s.out_port, self.udp_port_out) - self.assertEqual(s.ext_port, self.udp_external_port) - - # ICMP session - s = sessions[2] - self.assertEqual(str(s.ext_addr), self.pg1.remote_ip4) - self.assertEqual(s.in_port, self.icmp_id_in) - self.assertEqual(s.out_port, self.icmp_external_id) - - def test_multiple_users(self): - """ Deterministic NAT multiple users """ - - nat_ip = "10.0.0.10" - port_in = 80 - external_port = 6303 - - host0 = self.pg0.remote_hosts[0] - host1 = self.pg0.remote_hosts[1] - - self.vapi.nat_det_add_del_map(is_add=1, in_addr=host0.ip4n, in_plen=24, - out_addr=socket.inet_aton(nat_ip), - out_plen=32) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - # host0 to out - p = (Ether(src=host0.mac, dst=self.pg0.local_mac) / - IP(src=host0.ip4, dst=self.pg1.remote_ip4) / - TCP(sport=port_in, dport=external_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, nat_ip) - self.assertEqual(ip.dst, self.pg1.remote_ip4) - self.assertEqual(tcp.dport, external_port) - port_out0 = tcp.sport - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # host1 to out - p = (Ether(src=host1.mac, dst=self.pg0.local_mac) / - IP(src=host1.ip4, dst=self.pg1.remote_ip4) / - TCP(sport=port_in, dport=external_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, nat_ip) - self.assertEqual(ip.dst, self.pg1.remote_ip4) - self.assertEqual(tcp.dport, external_port) - port_out1 = tcp.sport - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - dms = self.vapi.nat_det_map_dump() - self.assertEqual(1, len(dms)) - self.assertEqual(2, dms[0].ses_num) - - # out to host0 - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=nat_ip) / - TCP(sport=external_port, dport=port_out0)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg1.remote_ip4) - self.assertEqual(ip.dst, host0.ip4) - self.assertEqual(tcp.dport, port_in) - self.assertEqual(tcp.sport, external_port) - except: - self.logger.error(ppp("Unexpected or invalid packet:", p)) - raise - - # out to host1 - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=nat_ip) / - TCP(sport=external_port, dport=port_out1)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - p = capture[0] - try: - ip = p[IP] - tcp = p[TCP] - self.assertEqual(ip.src, self.pg1.remote_ip4) - self.assertEqual(ip.dst, host1.ip4) - self.assertEqual(tcp.dport, port_in) - self.assertEqual(tcp.sport, external_port) - except: - self.logger.error(ppp("Unexpected or invalid packet", p)) - raise - - # session close api test - self.vapi.nat_det_close_session_out(socket.inet_aton(nat_ip), - port_out1, - self.pg1.remote_ip4n, - external_port) - dms = self.vapi.nat_det_map_dump() - self.assertEqual(dms[0].ses_num, 1) - - self.vapi.nat_det_close_session_in(host0.ip4n, - port_in, - self.pg1.remote_ip4n, - external_port) - dms = self.vapi.nat_det_map_dump() - self.assertEqual(dms[0].ses_num, 0) - - def test_tcp_session_close_detection_in(self): - """ Deterministic NAT TCP session close from inside network """ - self.vapi.nat_det_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4n, - in_plen=32, - out_addr=socket.inet_aton(self.nat_addr), - out_plen=32) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - self.initiate_tcp_session(self.pg0, self.pg1) - - # close the session from inside - try: - # FIN packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="F")) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - pkts = [] - - # ACK packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="A")) - pkts.append(p) - - # FIN packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="F")) - pkts.append(p) - - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(2) - - # ACK packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="A")) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(1) - - # Check if deterministic NAT44 closed the session - dms = self.vapi.nat_det_map_dump() - self.assertEqual(0, dms[0].ses_num) - except: - self.logger.error("TCP session termination failed") - raise - - def test_tcp_session_close_detection_out(self): - """ Deterministic NAT TCP session close from outside network """ - self.vapi.nat_det_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4n, - in_plen=32, - out_addr=socket.inet_aton(self.nat_addr), - out_plen=32) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - self.initiate_tcp_session(self.pg0, self.pg1) - - # close the session from outside - try: - # FIN packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="F")) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - pkts = [] - - # ACK packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="A")) - pkts.append(p) - - # ACK packet in -> out - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port, - flags="F")) - pkts.append(p) - - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.get_capture(2) - - # ACK packet out -> in - p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - TCP(sport=self.tcp_external_port, dport=self.tcp_port_out, - flags="A")) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg0.get_capture(1) - - # Check if deterministic NAT44 closed the session - dms = self.vapi.nat_det_map_dump() - self.assertEqual(0, dms[0].ses_num) - except: - self.logger.error("TCP session termination failed") - raise - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_session_timeout(self): - """ Deterministic NAT session timeouts """ - self.vapi.nat_det_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4n, - in_plen=32, - out_addr=socket.inet_aton(self.nat_addr), - out_plen=32) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - - self.initiate_tcp_session(self.pg0, self.pg1) - self.vapi.nat_set_timeouts(udp=5, tcp_established=5, tcp_transitory=5, - icmp=5) - pkts = self.create_stream_in(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - sleep(15) - - dms = self.vapi.nat_det_map_dump() - self.assertEqual(0, dms[0].ses_num) - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_session_limit_per_user(self): - """ Deterministic NAT maximum sessions per user limit """ - self.vapi.nat_det_add_del_map(is_add=1, in_addr=self.pg0.remote_ip4n, - in_plen=32, - out_addr=socket.inet_aton(self.nat_addr), - out_plen=32) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg0.sw_if_index, - flags=flags, is_add=1) - self.vapi.nat44_interface_add_del_feature( - sw_if_index=self.pg1.sw_if_index, - is_add=1) - self.vapi.set_ipfix_exporter(collector_address=self.pg2.remote_ip4n, - src_address=self.pg2.local_ip4n, - path_mtu=512, - template_interval=10) - self.vapi.nat_ipfix_enable_disable(domain_id=1, src_port=4739, - enable=1) - - pkts = [] - for port in range(1025, 2025): - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - UDP(sport=port, dport=port)) - pkts.append(p) - - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / - UDP(sport=3001, dport=3002)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.assert_nothing_captured() - - # verify ICMP error packet - capture = self.pg0.get_capture(1) - p = capture[0] - self.assertTrue(p.haslayer(ICMP)) - icmp = p[ICMP] - self.assertEqual(icmp.type, 3) - self.assertEqual(icmp.code, 1) - self.assertTrue(icmp.haslayer(IPerror)) - inner_ip = icmp[IPerror] - self.assertEqual(inner_ip[UDPerror].sport, 3001) - self.assertEqual(inner_ip[UDPerror].dport, 3002) - - dms = self.vapi.nat_det_map_dump() - - self.assertEqual(1000, dms[0].ses_num) - - # verify IPFIX logging - self.vapi.ipfix_flush() - sleep(1) - capture = self.pg2.get_capture(2) - ipfix = IPFIXDecoder() - # first load template - for p in capture: - self.assertTrue(p.haslayer(IPFIX)) - if p.haslayer(Template): - ipfix.add_template(p.getlayer(Template)) - # verify events in data set - for p in capture: - if p.haslayer(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_max_entries_per_user(data, - 1000, - self.pg0.remote_ip4n) - - def clear_nat_det(self): - """ - Clear deterministic NAT configuration. - """ - self.vapi.nat_ipfix_enable_disable(domain_id=1, src_port=4739, - enable=0) - self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, - tcp_transitory=240, icmp=60) - deterministic_mappings = self.vapi.nat_det_map_dump() - for dsm in deterministic_mappings: - self.vapi.nat_det_add_del_map(is_add=0, in_addr=dsm.in_addr, - in_plen=dsm.in_plen, - out_addr=dsm.out_addr, - out_plen=dsm.out_plen) - - interfaces = self.vapi.nat44_interface_dump() - for intf in interfaces: - self.vapi.nat44_interface_add_del_feature( - sw_if_index=intf.sw_if_index, - flags=intf.flags) - - def tearDown(self): - super(TestDeterministicNAT, self).tearDown() - if not self.vpp_dead: - self.clear_nat_det() - - def show_commands_at_teardown(self): - self.logger.info(self.vapi.cli("show nat44 interfaces")) - self.logger.info(self.vapi.cli("show nat timeouts")) - self.logger.info( - self.vapi.cli("show nat44 deterministic mappings")) - self.logger.info( - self.vapi.cli("show nat44 deterministic sessions")) - - -class TestNAT64(MethodHolder): - """ NAT64 Test Cases """ - - @classmethod - def setUpConstants(cls): - super(TestNAT64, cls).setUpConstants() - cls.vpp_cmdline.extend(["nat", "{", "nat64 bib hash buckets 128", - "nat64 st hash buckets 256", "}"]) - - @classmethod - def setUpClass(cls): - super(TestNAT64, cls).setUpClass() - - try: - cls.tcp_port_in = 6303 - cls.tcp_port_out = 6303 - cls.udp_port_in = 6304 - cls.udp_port_out = 6304 - cls.icmp_id_in = 6305 - cls.icmp_id_out = 6305 - cls.tcp_external_port = 80 - cls.nat_addr = '10.0.0.3' - cls.nat_addr_n = socket.inet_pton(socket.AF_INET, cls.nat_addr) - cls.vrf1_id = 10 - cls.vrf1_nat_addr = '10.0.10.3' - cls.ipfix_src_port = 4739 - cls.ipfix_domain_id = 1 - - cls.create_pg_interfaces(range(6)) - cls.ip6_interfaces = list(cls.pg_interfaces[0:1]) - cls.ip6_interfaces.append(cls.pg_interfaces[2]) - cls.ip4_interfaces = list(cls.pg_interfaces[1:2]) - - cls.vapi.ip_table_add_del(is_ipv6=1, is_add=1, - table_id=cls.vrf1_id) - - cls.pg_interfaces[2].set_table_ip6(cls.vrf1_id) - - cls.pg0.generate_remote_hosts(2) - - for i in cls.ip6_interfaces: - i.admin_up() - i.config_ip6() - i.configure_ipv6_neighbors() - - for i in cls.ip4_interfaces: - i.admin_up() - i.config_ip4() - i.resolve_arp() - - cls.pg3.admin_up() - cls.pg3.config_ip4() - cls.pg3.resolve_arp() - cls.pg3.config_ip6() - cls.pg3.configure_ipv6_neighbors() - - cls.pg5.admin_up() - cls.pg5.config_ip6() - - except Exception: - super(TestNAT64, cls).tearDownClass() - raise - - @classmethod - def tearDownClass(cls): - super(TestNAT64, cls).tearDownClass() - - def test_nat64_inside_interface_handles_neighbor_advertisement(self): - """ NAT64 inside interface handles Neighbor Advertisement """ - - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg5.sw_if_index) - - # Try to send ping - ping = (Ether(dst=self.pg5.local_mac, src=self.pg5.remote_mac) / - IPv6(src=self.pg5.remote_ip6, dst=self.pg5.local_ip6) / - ICMPv6EchoRequest()) - pkts = [ping] - self.pg5.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Wait for Neighbor Solicitation - capture = self.pg5.get_capture(len(pkts)) - packet = capture[0] - try: - self.assertEqual(packet[IPv6].src, self.pg5.local_ip6) - self.assertEqual(packet.haslayer(ICMPv6ND_NS), 1) - tgt = packet[ICMPv6ND_NS].tgt - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # Send Neighbor Advertisement - p = (Ether(dst=self.pg5.local_mac, src=self.pg5.remote_mac) / - IPv6(src=self.pg5.remote_ip6, dst=self.pg5.local_ip6) / - ICMPv6ND_NA(tgt=tgt) / - ICMPv6NDOptDstLLAddr(lladdr=self.pg5.remote_mac)) - pkts = [p] - self.pg5.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Try to send ping again - pkts = [ping] - self.pg5.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - - # Wait for ping reply - capture = self.pg5.get_capture(len(pkts)) - packet = capture[0] - try: - self.assertEqual(packet[IPv6].src, self.pg5.local_ip6) - self.assertEqual(packet[IPv6].dst, self.pg5.remote_ip6) - self.assertEqual(packet.haslayer(ICMPv6EchoReply), 1) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_pool(self): - """ Add/delete address to NAT64 pool """ - nat_addr = '1.2.3.4' - - self.vapi.nat64_add_del_pool_addr_range(start_addr=nat_addr, - end_addr=nat_addr, - vrf_id=0xFFFFFFFF, is_add=1) - - addresses = self.vapi.nat64_pool_addr_dump() - self.assertEqual(len(addresses), 1) - self.assertEqual(str(addresses[0].address), nat_addr) - - self.vapi.nat64_add_del_pool_addr_range(start_addr=nat_addr, - end_addr=nat_addr, - vrf_id=0xFFFFFFFF, is_add=0) - - addresses = self.vapi.nat64_pool_addr_dump() - self.assertEqual(len(addresses), 0) - - def test_interface(self): - """ Enable/disable NAT64 feature on the interface """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - interfaces = self.vapi.nat64_interface_dump() - self.assertEqual(len(interfaces), 2) - pg0_found = False - pg1_found = False - for intf in interfaces: - if intf.sw_if_index == self.pg0.sw_if_index: - self.assertEqual(intf.flags, self.config_flags.NAT_IS_INSIDE) - pg0_found = True - elif intf.sw_if_index == self.pg1.sw_if_index: - self.assertEqual(intf.flags, self.config_flags.NAT_IS_OUTSIDE) - pg1_found = True - self.assertTrue(pg0_found) - self.assertTrue(pg1_found) - - features = self.vapi.cli("show interface features pg0") - self.assertIn('nat64-in2out', features) - features = self.vapi.cli("show interface features pg1") - self.assertIn('nat64-out2in', features) - - self.vapi.nat64_add_del_interface(is_add=0, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=0, flags=flags, - sw_if_index=self.pg1.sw_if_index) - - interfaces = self.vapi.nat64_interface_dump() - self.assertEqual(len(interfaces), 0) - - def test_static_bib(self): - """ Add/delete static BIB entry """ - in_addr = '2001:db8:85a3::8a2e:370:7334' - out_addr = '10.1.1.3' - in_port = 1234 - out_port = 5678 - proto = IP_PROTOS.tcp - - self.vapi.nat64_add_del_static_bib(i_addr=in_addr, o_addr=out_addr, - i_port=in_port, o_port=out_port, - proto=proto, vrf_id=0, is_add=1) - bib = self.vapi.nat64_bib_dump(proto=IP_PROTOS.tcp) - static_bib_num = 0 - for bibe in bib: - if bibe.flags & self.config_flags.NAT_IS_STATIC: - static_bib_num += 1 - self.assertEqual(str(bibe.i_addr), in_addr) - self.assertEqual(str(bibe.o_addr), out_addr) - self.assertEqual(bibe.i_port, in_port) - self.assertEqual(bibe.o_port, out_port) - self.assertEqual(static_bib_num, 1) - bibs = self.statistics.get_counter('/nat64/total-bibs') - self.assertEqual(bibs[0][0], 1) - - self.vapi.nat64_add_del_static_bib(i_addr=in_addr, o_addr=out_addr, - i_port=in_port, o_port=out_port, - proto=proto, vrf_id=0, is_add=0) - bib = self.vapi.nat64_bib_dump(proto=IP_PROTOS.tcp) - static_bib_num = 0 - for bibe in bib: - if bibe.flags & self.config_flags.NAT_IS_STATIC: - static_bib_num += 1 - self.assertEqual(static_bib_num, 0) - bibs = self.statistics.get_counter('/nat64/total-bibs') - self.assertEqual(bibs[0][0], 0) - - def test_set_timeouts(self): - """ Set NAT64 timeouts """ - # verify default values - timeouts = self.vapi.nat_get_timeouts() - self.assertEqual(timeouts.udp, 300) - self.assertEqual(timeouts.icmp, 60) - self.assertEqual(timeouts.tcp_transitory, 240) - self.assertEqual(timeouts.tcp_established, 7440) - - # set and verify custom values - self.vapi.nat_set_timeouts(udp=200, tcp_established=7450, - tcp_transitory=250, icmp=30) - timeouts = self.vapi.nat_get_timeouts() - self.assertEqual(timeouts.udp, 200) - self.assertEqual(timeouts.icmp, 30) - self.assertEqual(timeouts.tcp_transitory, 250) - self.assertEqual(timeouts.tcp_established, 7450) - - def test_dynamic(self): - """ NAT64 dynamic translation test """ - self.tcp_port_in = 6303 - self.udp_port_in = 6304 - self.icmp_id_in = 6305 - - ses_num_start = self.nat64_get_ses_num() - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - # in2out - tcpn = self.statistics.get_err_counter('/err/nat64-in2out/TCP packets') - udpn = self.statistics.get_err_counter('/err/nat64-in2out/UDP packets') - icmpn = self.statistics.get_err_counter( - '/err/nat64-in2out/ICMP packets') - totaln = self.statistics.get_err_counter( - '/err/nat64-in2out/good in2out packets processed') - - pkts = self.create_stream_in_ip6(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=self.nat_addr, - dst_ip=self.pg1.remote_ip4) - - err = self.statistics.get_err_counter('/err/nat64-in2out/TCP packets') - self.assertEqual(err - tcpn, 1) - err = self.statistics.get_err_counter('/err/nat64-in2out/UDP packets') - self.assertEqual(err - udpn, 1) - err = self.statistics.get_err_counter('/err/nat64-in2out/ICMP packets') - self.assertEqual(err - icmpn, 1) - err = self.statistics.get_err_counter( - '/err/nat64-in2out/good in2out packets processed') - self.assertEqual(err - totaln, 3) - - # out2in - tcpn = self.statistics.get_err_counter('/err/nat64-out2in/TCP packets') - udpn = self.statistics.get_err_counter('/err/nat64-out2in/UDP packets') - icmpn = self.statistics.get_err_counter( - '/err/nat64-out2in/ICMP packets') - totaln = self.statistics.get_err_counter( - '/err/nat64-out2in/good out2in packets processed') - - pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4])) - self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6) - - err = self.statistics.get_err_counter('/err/nat64-out2in/TCP packets') - self.assertEqual(err - tcpn, 1) - err = self.statistics.get_err_counter('/err/nat64-out2in/UDP packets') - self.assertEqual(err - udpn, 1) - err = self.statistics.get_err_counter('/err/nat64-out2in/ICMP packets') - self.assertEqual(err - icmpn, 1) - err = self.statistics.get_err_counter( - '/err/nat64-out2in/good out2in packets processed') - self.assertEqual(err - totaln, 3) - - bibs = self.statistics.get_counter('/nat64/total-bibs') - self.assertEqual(bibs[0][0], 3) - sessions = self.statistics.get_counter('/nat64/total-sessions') - self.assertEqual(sessions[0][0], 3) - - # in2out - pkts = self.create_stream_in_ip6(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=self.nat_addr, - dst_ip=self.pg1.remote_ip4) - - # out2in - pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6) - - ses_num_end = self.nat64_get_ses_num() - - self.assertEqual(ses_num_end - ses_num_start, 3) - - # tenant with specific VRF - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.vrf1_nat_addr, - end_addr=self.vrf1_nat_addr, - vrf_id=self.vrf1_id, is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg2.sw_if_index) - - pkts = self.create_stream_in_ip6(self.pg2, self.pg1) - self.pg2.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=self.vrf1_nat_addr, - dst_ip=self.pg1.remote_ip4) - - pkts = self.create_stream_out(self.pg1, dst_ip=self.vrf1_nat_addr) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg2.get_capture(len(pkts)) - self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg2.remote_ip6) - - def test_static(self): - """ NAT64 static translation test """ - self.tcp_port_in = 60303 - self.udp_port_in = 60304 - self.icmp_id_in = 60305 - self.tcp_port_out = 60303 - self.udp_port_out = 60304 - self.icmp_id_out = 60305 - - ses_num_start = self.nat64_get_ses_num() - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - self.vapi.nat64_add_del_static_bib(i_addr=self.pg0.remote_ip6n, - o_addr=self.nat_addr, - i_port=self.tcp_port_in, - o_port=self.tcp_port_out, - proto=IP_PROTOS.tcp, vrf_id=0, - is_add=1) - self.vapi.nat64_add_del_static_bib(i_addr=self.pg0.remote_ip6n, - o_addr=self.nat_addr, - i_port=self.udp_port_in, - o_port=self.udp_port_out, - proto=IP_PROTOS.udp, vrf_id=0, - is_add=1) - self.vapi.nat64_add_del_static_bib(i_addr=self.pg0.remote_ip6n, - o_addr=self.nat_addr, - i_port=self.icmp_id_in, - o_port=self.icmp_id_out, - proto=IP_PROTOS.icmp, vrf_id=0, - is_add=1) - - # in2out - pkts = self.create_stream_in_ip6(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=self.nat_addr, - dst_ip=self.pg1.remote_ip4, same_port=True) - - # out2in - pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4])) - self.verify_capture_in_ip6(capture, ip[IPv6].src, self.pg0.remote_ip6) - - ses_num_end = self.nat64_get_ses_num() - - self.assertEqual(ses_num_end - ses_num_start, 3) - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_session_timeout(self): - """ NAT64 session timeout """ - self.icmp_id_in = 1234 - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - self.vapi.nat_set_timeouts(udp=300, tcp_established=5, - tcp_transitory=5, - icmp=5) - - pkts = self.create_stream_in_ip6(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - - ses_num_before_timeout = self.nat64_get_ses_num() - - sleep(15) - - # ICMP and TCP session after timeout - ses_num_after_timeout = self.nat64_get_ses_num() - self.assertEqual(ses_num_before_timeout - ses_num_after_timeout, 2) - - def test_icmp_error(self): - """ NAT64 ICMP Error message translation """ - self.tcp_port_in = 6303 - self.udp_port_in = 6304 - self.icmp_id_in = 6305 - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - # send some packets to create sessions - pkts = self.create_stream_in_ip6(self.pg0, self.pg1) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture_ip4 = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture_ip4, - nat_ip=self.nat_addr, - dst_ip=self.pg1.remote_ip4) - - pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture_ip6 = self.pg0.get_capture(len(pkts)) - ip = IPv6(src=''.join(['64:ff9b::', self.pg1.remote_ip4])) - self.verify_capture_in_ip6(capture_ip6, ip[IPv6].src, - self.pg0.remote_ip6) - - # in2out - pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=self.pg0.remote_ip6, dst=ip[IPv6].src) / - ICMPv6DestUnreach(code=1) / - packet[IPv6] for packet in capture_ip6] - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IP].src, self.nat_addr) - self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) - self.assertEqual(packet[ICMP].type, 3) - self.assertEqual(packet[ICMP].code, 13) - inner = packet[IPerror] - self.assertEqual(inner.src, self.pg1.remote_ip4) - self.assertEqual(inner.dst, self.nat_addr) - self.assert_packet_checksums_valid(packet) - if inner.haslayer(TCPerror): - self.assertEqual(inner[TCPerror].dport, self.tcp_port_out) - elif inner.haslayer(UDPerror): - self.assertEqual(inner[UDPerror].dport, self.udp_port_out) - else: - self.assertEqual(inner[ICMPerror].id, self.icmp_id_out) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # out2in - pkts = [Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - ICMP(type=3, code=13) / - packet[IP] for packet in capture_ip4] - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IPv6].src, ip.src) - self.assertEqual(packet[IPv6].dst, self.pg0.remote_ip6) - icmp = packet[ICMPv6DestUnreach] - self.assertEqual(icmp.code, 1) - inner = icmp[IPerror6] - self.assertEqual(inner.src, self.pg0.remote_ip6) - self.assertEqual(inner.dst, ip.src) - self.assert_icmpv6_checksum_valid(packet) - if inner.haslayer(TCPerror): - self.assertEqual(inner[TCPerror].sport, self.tcp_port_in) - elif inner.haslayer(UDPerror): - self.assertEqual(inner[UDPerror].sport, self.udp_port_in) - else: - self.assertEqual(inner[ICMPv6EchoRequest].id, - self.icmp_id_in) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_hairpinning(self): - """ NAT64 hairpinning """ - - client = self.pg0.remote_hosts[0] - server = self.pg0.remote_hosts[1] - server_tcp_in_port = 22 - server_tcp_out_port = 4022 - server_udp_in_port = 23 - server_udp_out_port = 4023 - client_tcp_in_port = 1234 - client_udp_in_port = 1235 - client_tcp_out_port = 0 - client_udp_out_port = 0 - ip = IPv6(src=''.join(['64:ff9b::', self.nat_addr])) - nat_addr_ip6 = ip.src - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n, - o_addr=self.nat_addr, - i_port=server_tcp_in_port, - o_port=server_tcp_out_port, - proto=IP_PROTOS.tcp, vrf_id=0, - is_add=1) - self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n, - o_addr=self.nat_addr, - i_port=server_udp_in_port, - o_port=server_udp_out_port, - proto=IP_PROTOS.udp, vrf_id=0, - is_add=1) - - # client to server - pkts = [] - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=client.ip6, dst=nat_addr_ip6) / - TCP(sport=client_tcp_in_port, dport=server_tcp_out_port)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=client.ip6, dst=nat_addr_ip6) / - UDP(sport=client_udp_in_port, dport=server_udp_out_port)) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IPv6].src, nat_addr_ip6) - self.assertEqual(packet[IPv6].dst, server.ip6) - self.assert_packet_checksums_valid(packet) - if packet.haslayer(TCP): - self.assertNotEqual(packet[TCP].sport, client_tcp_in_port) - self.assertEqual(packet[TCP].dport, server_tcp_in_port) - client_tcp_out_port = packet[TCP].sport - else: - self.assertNotEqual(packet[UDP].sport, client_udp_in_port) - self.assertEqual(packet[UDP].dport, server_udp_in_port) - client_udp_out_port = packet[UDP].sport - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # server to client - pkts = [] - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=server.ip6, dst=nat_addr_ip6) / - TCP(sport=server_tcp_in_port, dport=client_tcp_out_port)) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=server.ip6, dst=nat_addr_ip6) / - UDP(sport=server_udp_in_port, dport=client_udp_out_port)) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IPv6].src, nat_addr_ip6) - self.assertEqual(packet[IPv6].dst, client.ip6) - self.assert_packet_checksums_valid(packet) - if packet.haslayer(TCP): - self.assertEqual(packet[TCP].sport, server_tcp_out_port) - self.assertEqual(packet[TCP].dport, client_tcp_in_port) - else: - self.assertEqual(packet[UDP].sport, server_udp_out_port) - self.assertEqual(packet[UDP].dport, client_udp_in_port) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # ICMP error - pkts = [] - pkts = [Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=client.ip6, dst=nat_addr_ip6) / - ICMPv6DestUnreach(code=1) / - packet[IPv6] for packet in capture] - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IPv6].src, nat_addr_ip6) - self.assertEqual(packet[IPv6].dst, server.ip6) - icmp = packet[ICMPv6DestUnreach] - self.assertEqual(icmp.code, 1) - inner = icmp[IPerror6] - self.assertEqual(inner.src, server.ip6) - self.assertEqual(inner.dst, nat_addr_ip6) - self.assert_packet_checksums_valid(packet) - if inner.haslayer(TCPerror): - self.assertEqual(inner[TCPerror].sport, server_tcp_in_port) - self.assertEqual(inner[TCPerror].dport, - client_tcp_out_port) - else: - self.assertEqual(inner[UDPerror].sport, server_udp_in_port) - self.assertEqual(inner[UDPerror].dport, - client_udp_out_port) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_prefix(self): - """ NAT64 Network-Specific Prefix """ - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.vrf1_nat_addr, - end_addr=self.vrf1_nat_addr, - vrf_id=self.vrf1_id, is_add=1) - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg2.sw_if_index) - - # Add global prefix - global_pref64 = "2001:db8::" - global_pref64_len = 32 - global_pref64_str = "{}/{}".format(global_pref64, global_pref64_len) - self.vapi.nat64_add_del_prefix(prefix=global_pref64_str, vrf_id=0, - is_add=1) - - prefix = self.vapi.nat64_prefix_dump() - self.assertEqual(len(prefix), 1) - self.assertEqual(prefix[0].prefix, - IPv6Network(unicode(global_pref64_str))) - self.assertEqual(prefix[0].vrf_id, 0) - - # Add tenant specific prefix - vrf1_pref64 = "2001:db8:122:300::" - vrf1_pref64_len = 56 - vrf1_pref64_str = "{}/{}".format(vrf1_pref64, vrf1_pref64_len) - self.vapi.nat64_add_del_prefix(prefix=vrf1_pref64_str, - vrf_id=self.vrf1_id, is_add=1) - - prefix = self.vapi.nat64_prefix_dump() - self.assertEqual(len(prefix), 2) - - # Global prefix - pkts = self.create_stream_in_ip6(self.pg0, - self.pg1, - pref=global_pref64, - plen=global_pref64_len) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=self.nat_addr, - dst_ip=self.pg1.remote_ip4) - - pkts = self.create_stream_out(self.pg1, dst_ip=self.nat_addr) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - dst_ip = self.compose_ip6(self.pg1.remote_ip4, - global_pref64, - global_pref64_len) - self.verify_capture_in_ip6(capture, dst_ip, self.pg0.remote_ip6) - - # Tenant specific prefix - pkts = self.create_stream_in_ip6(self.pg2, - self.pg1, - pref=vrf1_pref64, - plen=vrf1_pref64_len) - self.pg2.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - self.verify_capture_out(capture, nat_ip=self.vrf1_nat_addr, - dst_ip=self.pg1.remote_ip4) - - pkts = self.create_stream_out(self.pg1, dst_ip=self.vrf1_nat_addr) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg2.get_capture(len(pkts)) - dst_ip = self.compose_ip6(self.pg1.remote_ip4, - vrf1_pref64, - vrf1_pref64_len) - self.verify_capture_in_ip6(capture, dst_ip, self.pg2.remote_ip6) - - def test_unknown_proto(self): - """ NAT64 translate packet with unknown protocol """ - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - remote_ip6 = self.compose_ip6(self.pg1.remote_ip4, '64:ff9b::', 96) - - # in2out - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=self.pg0.remote_ip6, dst=remote_ip6) / - TCP(sport=self.tcp_port_in, dport=20)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=self.pg0.remote_ip6, dst=remote_ip6, nh=47) / - GRE() / - IP(src=self.pg2.local_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IP].src, self.nat_addr) - self.assertEqual(packet[IP].dst, self.pg1.remote_ip4) - self.assertEqual(packet.haslayer(GRE), 1) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # out2in - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IP(src=self.pg1.remote_ip4, dst=self.nat_addr) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg2.local_ip4) / - TCP(sport=1234, dport=1234)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IPv6].src, remote_ip6) - self.assertEqual(packet[IPv6].dst, self.pg0.remote_ip6) - self.assertEqual(packet[IPv6].nh, 47) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_hairpinning_unknown_proto(self): - """ NAT64 translate packet with unknown protocol - hairpinning """ - - client = self.pg0.remote_hosts[0] - server = self.pg0.remote_hosts[1] - server_tcp_in_port = 22 - server_tcp_out_port = 4022 - client_tcp_in_port = 1234 - client_tcp_out_port = 1235 - server_nat_ip = "10.0.0.100" - client_nat_ip = "10.0.0.110" - server_nat_ip6 = self.compose_ip6(server_nat_ip, '64:ff9b::', 96) - client_nat_ip6 = self.compose_ip6(client_nat_ip, '64:ff9b::', 96) - - self.vapi.nat64_add_del_pool_addr_range(start_addr=server_nat_ip, - end_addr=client_nat_ip, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n, - o_addr=server_nat_ip, - i_port=server_tcp_in_port, - o_port=server_tcp_out_port, - proto=IP_PROTOS.tcp, vrf_id=0, - is_add=1) - - self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n, - o_addr=server_nat_ip, i_port=0, - o_port=0, - proto=IP_PROTOS.gre, vrf_id=0, - is_add=1) - - self.vapi.nat64_add_del_static_bib(i_addr=client.ip6n, - o_addr=client_nat_ip, - i_port=client_tcp_in_port, - o_port=client_tcp_out_port, - proto=IP_PROTOS.tcp, vrf_id=0, - is_add=1) - - # client to server - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=client.ip6, dst=server_nat_ip6) / - TCP(sport=client_tcp_in_port, dport=server_tcp_out_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=client.ip6, dst=server_nat_ip6, nh=IP_PROTOS.gre) / - GRE() / - IP(src=self.pg2.local_ip4, dst=self.pg2.remote_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IPv6].src, client_nat_ip6) - self.assertEqual(packet[IPv6].dst, server.ip6) - self.assertEqual(packet[IPv6].nh, IP_PROTOS.gre) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # server to client - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=server.ip6, dst=client_nat_ip6, nh=IP_PROTOS.gre) / - GRE() / - IP(src=self.pg2.remote_ip4, dst=self.pg2.local_ip4) / - TCP(sport=1234, dport=1234)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg0.get_capture(1) - packet = p[0] - try: - self.assertEqual(packet[IPv6].src, server_nat_ip6) - self.assertEqual(packet[IPv6].dst, client.ip6) - self.assertEqual(packet[IPv6].nh, IP_PROTOS.gre) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def test_one_armed_nat64(self): - """ One armed NAT64 """ - external_port = 0 - remote_host_ip6 = self.compose_ip6(self.pg3.remote_ip4, - '64:ff9b::', - 96) - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg3.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg3.sw_if_index) - - # in2out - p = (Ether(src=self.pg3.remote_mac, dst=self.pg3.local_mac) / - IPv6(src=self.pg3.remote_ip6, dst=remote_host_ip6) / - TCP(sport=12345, dport=80)) - self.pg3.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.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.pg3.remote_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.pg3.remote_mac, dst=self.pg3.local_mac) / - IP(src=self.pg3.remote_ip4, dst=self.nat_addr) / - TCP(sport=80, dport=external_port)) - self.pg3.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg3.get_capture(1) - p = capture[0] - try: - ip = p[IPv6] - tcp = p[TCP] - self.assertEqual(ip.src, remote_host_ip6) - self.assertEqual(ip.dst, self.pg3.remote_ip6) - 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 - - def test_frag_in_order(self): - """ NAT64 translate fragments arriving in order """ - self.tcp_port_in = random.randint(1025, 65535) - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - reass = self.vapi.nat_reass_dump() - reass_n_start = len(reass) - - # in2out - data = b'a' * 200 - pkts = self.create_stream_frag_ip6(self.pg0, self.pg1.remote_ip4, - self.tcp_port_in, 20, data) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg1.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.nat_addr, - self.pg1.remote_ip4) - self.assertEqual(p[TCP].dport, 20) - self.assertNotEqual(p[TCP].sport, self.tcp_port_in) - self.tcp_port_out = p[TCP].sport - self.assertEqual(data, p[Raw].load) - - # out2in - data = b"A" * 4 + b"b" * 16 + b"C" * 3 - pkts = self.create_stream_frag(self.pg1, - self.nat_addr, - 20, - self.tcp_port_out, - data) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg0.get_capture(len(pkts)) - src = self.compose_ip6(self.pg1.remote_ip4, '64:ff9b::', 96) - p = self.reass_frags_and_verify_ip6(frags, src, self.pg0.remote_ip6) - self.assertEqual(p[TCP].sport, 20) - self.assertEqual(p[TCP].dport, self.tcp_port_in) - self.assertEqual(data, p[Raw].load) - - reass = self.vapi.nat_reass_dump() - reass_n_end = len(reass) - - self.assertEqual(reass_n_end - reass_n_start, 2) - - def test_reass_hairpinning(self): - """ NAT64 fragments hairpinning """ - data = 'a' * 200 - server = self.pg0.remote_hosts[1] - server_in_port = random.randint(1025, 65535) - server_out_port = random.randint(1025, 65535) - client_in_port = random.randint(1025, 65535) - ip = IPv6(src=''.join(['64:ff9b::', self.nat_addr])) - nat_addr_ip6 = ip.src - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - # add static BIB entry for server - self.vapi.nat64_add_del_static_bib(i_addr=server.ip6n, - o_addr=self.nat_addr, - i_port=server_in_port, - o_port=server_out_port, - proto=IP_PROTOS.tcp, vrf_id=0, - is_add=1) - - # send packet from host to server - pkts = self.create_stream_frag_ip6(self.pg0, - self.nat_addr, - client_in_port, - server_out_port, - data) - 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_ip6(frags, nat_addr_ip6, server.ip6) - self.assertNotEqual(p[TCP].sport, client_in_port) - self.assertEqual(p[TCP].dport, server_in_port) - self.assertEqual(data, p[Raw].load) - - def test_frag_out_of_order(self): - """ NAT64 translate fragments arriving out of order """ - self.tcp_port_in = random.randint(1025, 65535) - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - # in2out - data = b'a' * 200 - pkts = self.create_stream_frag_ip6(self.pg0, self.pg1.remote_ip4, - self.tcp_port_in, 20, data) - pkts.reverse() - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg1.get_capture(len(pkts)) - p = self.reass_frags_and_verify(frags, - self.nat_addr, - self.pg1.remote_ip4) - self.assertEqual(p[TCP].dport, 20) - self.assertNotEqual(p[TCP].sport, self.tcp_port_in) - self.tcp_port_out = p[TCP].sport - self.assertEqual(data, p[Raw].load) - - # out2in - data = b"A" * 4 + b"B" * 16 + b"C" * 3 - pkts = self.create_stream_frag(self.pg1, - self.nat_addr, - 20, - self.tcp_port_out, - data) - pkts.reverse() - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - frags = self.pg0.get_capture(len(pkts)) - src = self.compose_ip6(self.pg1.remote_ip4, '64:ff9b::', 96) - p = self.reass_frags_and_verify_ip6(frags, src, self.pg0.remote_ip6) - self.assertEqual(p[TCP].sport, 20) - self.assertEqual(p[TCP].dport, self.tcp_port_in) - self.assertEqual(data, p[Raw].load) - - def test_interface_addr(self): - """ Acquire NAT64 pool addresses from interface """ - self.vapi.nat64_add_del_interface_addr( - is_add=1, - sw_if_index=self.pg4.sw_if_index) - - # no address in NAT64 pool - addresses = self.vapi.nat44_address_dump() - self.assertEqual(0, len(addresses)) - - # configure interface address and check NAT64 address pool - self.pg4.config_ip4() - addresses = self.vapi.nat64_pool_addr_dump() - self.assertEqual(len(addresses), 1) - - self.assertEqual(str(addresses[0].address), - self.pg4.local_ip4) - - # remove interface address and check NAT64 address pool - self.pg4.unconfig_ip4() - addresses = self.vapi.nat64_pool_addr_dump() - self.assertEqual(0, len(addresses)) - - @unittest.skipUnless(running_extended_tests, "part of extended tests") - def test_ipfix_max_bibs_sessions(self): - """ IPFIX logging maximum session and BIB entries exceeded """ - max_bibs = 1280 - max_sessions = 2560 - remote_host_ip6 = self.compose_ip6(self.pg1.remote_ip4, - '64:ff9b::', - 96) - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - - pkts = [] - src = "" - for i in range(0, max_bibs): - src = "fd01:aa::%x" % (i) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IPv6(src=src, dst=remote_host_ip6) / - TCP(sport=12345, dport=80)) - pkts.append(p) - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IPv6(src=src, dst=remote_host_ip6) / - TCP(sport=12345, dport=22)) - 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_ip4n, - src_address=self.pg3.local_ip4n, - path_mtu=512, - template_interval=10) - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=1) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IPv6(src=src, dst=remote_host_ip6) / - TCP(sport=12345, dport=25)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sleep(1) - self.vapi.ipfix_flush() - capture = self.pg3.get_capture(9) - ipfix = IPFIXDecoder() - # first load template - for p in capture: - self.assertTrue(p.haslayer(IPFIX)) - self.assertEqual(p[IP].src, self.pg3.local_ip4) - self.assertEqual(p[IP].dst, self.pg3.remote_ip4) - self.assertEqual(p[UDP].sport, self.ipfix_src_port) - self.assertEqual(p[UDP].dport, 4739) - self.assertEqual(p[IPFIX].observationDomainID, - self.ipfix_domain_id) - if p.haslayer(Template): - ipfix.add_template(p.getlayer(Template)) - # verify events in data set - for p in capture: - if p.haslayer(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_max_sessions(data, max_sessions) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IPv6(src=self.pg0.remote_ip6, dst=remote_host_ip6) / - TCP(sport=12345, dport=80)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sleep(1) - self.vapi.ipfix_flush() - capture = self.pg3.get_capture(1) - # verify events in data set - 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(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_max_bibs(data, max_bibs) - - def test_ipfix_max_frags(self): - """ IPFIX logging maximum fragments pending reassembly exceeded """ - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - self.vapi.nat_set_reass(timeout=2, max_reass=1024, max_frag=1, - drop_frag=0, is_ip6=1) - self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n, - src_address=self.pg3.local_ip4n, - path_mtu=512, - template_interval=10) - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=1) - - data = b'a' * 200 - pkts = self.create_stream_frag_ip6(self.pg0, self.pg1.remote_ip4, - self.tcp_port_in, 20, data) - pkts.reverse() - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.pg1.assert_nothing_captured() - sleep(1) - self.vapi.ipfix_flush() - capture = self.pg3.get_capture(9) - ipfix = IPFIXDecoder() - # first load template - for p in capture: - self.assertTrue(p.haslayer(IPFIX)) - self.assertEqual(p[IP].src, self.pg3.local_ip4) - self.assertEqual(p[IP].dst, self.pg3.remote_ip4) - self.assertEqual(p[UDP].sport, self.ipfix_src_port) - self.assertEqual(p[UDP].dport, 4739) - self.assertEqual(p[IPFIX].observationDomainID, - self.ipfix_domain_id) - if p.haslayer(Template): - ipfix.add_template(p.getlayer(Template)) - # verify events in data set - for p in capture: - if p.haslayer(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - self.verify_ipfix_max_fragments_ip6(data, 1, - self.pg0.remote_ip6n) - - def test_ipfix_bib_ses(self): - """ IPFIX logging NAT64 BIB/session create and delete events """ - self.tcp_port_in = random.randint(1025, 65535) - remote_host_ip6 = self.compose_ip6(self.pg1.remote_ip4, - '64:ff9b::', - 96) - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n, - src_address=self.pg3.local_ip4n, - path_mtu=512, - template_interval=10) - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=1) - - # Create - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IPv6(src=self.pg0.remote_ip6, dst=remote_host_ip6) / - TCP(sport=self.tcp_port_in, dport=25)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - self.tcp_port_out = p[0][TCP].sport - self.vapi.ipfix_flush() - capture = self.pg3.get_capture(10) - 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)) - if scapy.compat.orb(data[0][230]) == 10: - self.verify_ipfix_bib(data, 1, self.pg0.remote_ip6n) - elif scapy.compat.orb(data[0][230]) == 6: - self.verify_ipfix_nat64_ses(data, - 1, - self.pg0.remote_ip6n, - self.pg1.remote_ip4, - 25) - else: - self.logger.error(ppp("Unexpected or invalid packet: ", p)) - - # Delete - self.pg_enable_capture(self.pg_interfaces) - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=0) - self.vapi.ipfix_flush() - capture = self.pg3.get_capture(2) - # verify events in data set - 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(Data): - data = ipfix.decode_data_set(p.getlayer(Set)) - if scapy.compat.orb(data[0][230]) == 11: - self.verify_ipfix_bib(data, 0, self.pg0.remote_ip6n) - elif scapy.compat.orb(data[0][230]) == 7: - self.verify_ipfix_nat64_ses(data, - 0, - self.pg0.remote_ip6n, - self.pg1.remote_ip4, - 25) - else: - self.logger.error(ppp("Unexpected or invalid packet: ", p)) - - def test_syslog_sess(self): - """ Test syslog session creation and deletion """ - self.tcp_port_in = random.randint(1025, 65535) - remote_host_ip6 = self.compose_ip6(self.pg1.remote_ip4, - '64:ff9b::', - 96) - - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=1) - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat64_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat64_add_del_interface(is_add=1, flags=0, - sw_if_index=self.pg1.sw_if_index) - self.vapi.syslog_set_filter( - self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_INFO) - self.vapi.syslog_set_sender(self.pg3.local_ip4n, self.pg3.remote_ip4n) - - p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / - IPv6(src=self.pg0.remote_ip6, dst=remote_host_ip6) / - TCP(sport=self.tcp_port_in, dport=self.tcp_external_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - p = self.pg1.get_capture(1) - self.tcp_port_out = p[0][TCP].sport - capture = self.pg3.get_capture(1) - self.verify_syslog_sess(capture[0][Raw].load, is_ip6=True) - - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - self.vapi.nat64_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - vrf_id=0xFFFFFFFF, - is_add=0) - capture = self.pg3.get_capture(1) - self.verify_syslog_sess(capture[0][Raw].load, False, True) - - def nat64_get_ses_num(self): - """ - Return number of active NAT64 sessions. - """ - st = self.vapi.nat64_st_dump(proto=255) - return len(st) - - def clear_nat64(self): - """ - Clear NAT64 configuration. - """ - self.vapi.nat_ipfix_enable_disable(domain_id=self.ipfix_domain_id, - src_port=self.ipfix_src_port, - enable=0) - self.ipfix_src_port = 4739 - self.ipfix_domain_id = 1 - - self.vapi.syslog_set_filter( - self.SYSLOG_SEVERITY.SYSLOG_API_SEVERITY_EMERG) - - self.vapi.nat_set_timeouts(udp=300, tcp_established=7440, - tcp_transitory=240, icmp=60) - - interfaces = self.vapi.nat64_interface_dump() - for intf in interfaces: - self.vapi.nat64_add_del_interface(is_add=0, flags=intf.flags, - sw_if_index=intf.sw_if_index) - - bib = self.vapi.nat64_bib_dump(proto=255) - for bibe in bib: - if bibe.flags & self.config_flags.NAT_IS_STATIC: - self.vapi.nat64_add_del_static_bib(i_addr=bibe.i_addr, - o_addr=bibe.o_addr, - i_port=bibe.i_port, - o_port=bibe.o_port, - proto=bibe.proto, - vrf_id=bibe.vrf_id, - is_add=0) - - adresses = self.vapi.nat64_pool_addr_dump() - for addr in adresses: - self.vapi.nat64_add_del_pool_addr_range(start_addr=addr.address, - end_addr=addr.address, - vrf_id=addr.vrf_id, - is_add=0) - - prefixes = self.vapi.nat64_prefix_dump() - for prefix in prefixes: - self.vapi.nat64_add_del_prefix(prefix=str(prefix.prefix), - vrf_id=prefix.vrf_id, is_add=0) - - bibs = self.statistics.get_counter('/nat64/total-bibs') - self.assertEqual(bibs[0][0], 0) - sessions = self.statistics.get_counter('/nat64/total-sessions') - self.assertEqual(sessions[0][0], 0) - - def tearDown(self): - super(TestNAT64, self).tearDown() - if not self.vpp_dead: - self.clear_nat64() - - def show_commands_at_teardown(self): - self.logger.info(self.vapi.cli("show nat64 pool")) - self.logger.info(self.vapi.cli("show nat64 interfaces")) - self.logger.info(self.vapi.cli("show nat64 prefix")) - self.logger.info(self.vapi.cli("show nat64 bib all")) - self.logger.info(self.vapi.cli("show nat64 session table all")) - self.logger.info(self.vapi.cli("show nat virtual-reassembly")) - - -class TestDSlite(MethodHolder): - """ DS-Lite Test Cases """ - - @classmethod - def setUpClass(cls): - super(TestDSlite, cls).setUpClass() - - try: - cls.nat_addr = '10.0.0.3' - - cls.create_pg_interfaces(range(3)) - cls.pg0.admin_up() - cls.pg0.config_ip4() - cls.pg0.resolve_arp() - cls.pg1.admin_up() - cls.pg1.config_ip6() - cls.pg1.generate_remote_hosts(2) - cls.pg1.configure_ipv6_neighbors() - cls.pg2.admin_up() - cls.pg2.config_ip4() - cls.pg2.resolve_arp() - - except Exception: - super(TestDSlite, cls).tearDownClass() - raise - - @classmethod - def tearDownClass(cls): - super(TestDSlite, cls).tearDownClass() - - def verify_syslog_apmadd(self, data, isaddr, isport, xsaddr, xsport, - sv6enc, proto): - message = data.decode('utf-8') - try: - message = SyslogMessage.parse(message) - except ParseError as e: - self.logger.error(e) - else: - self.assertEqual(message.severity, SyslogSeverity.info) - self.assertEqual(message.appname, 'NAT') - self.assertEqual(message.msgid, 'APMADD') - 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'), isaddr) - self.assertEqual(sd_params.get('ISPORT'), "%d" % isport) - self.assertEqual(sd_params.get('XATYP'), 'IPv4') - self.assertEqual(sd_params.get('XSADDR'), xsaddr) - self.assertEqual(sd_params.get('XSPORT'), "%d" % xsport) - self.assertEqual(sd_params.get('PROTO'), "%d" % proto) - self.assertTrue(sd_params.get('SSUBIX') is not None) - self.assertEqual(sd_params.get('SV6ENC'), sv6enc) - - def test_dslite(self): - """ Test DS-Lite """ - nat_config = self.vapi.nat_show_config() - self.assertEqual(0, nat_config.dslite_ce) - - self.vapi.dslite_add_del_pool_addr_range(start_addr=self.nat_addr, - end_addr=self.nat_addr, - is_add=1) - aftr_ip4 = '192.0.0.1' - aftr_ip6 = '2001:db8:85a3::8a2e:370:1' - self.vapi.dslite_set_aftr_addr(ip4_addr=aftr_ip4, ip6_addr=aftr_ip6) - self.vapi.syslog_set_sender(self.pg2.local_ip4n, self.pg2.remote_ip4n) - - # UDP - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(dst=aftr_ip6, src=self.pg1.remote_hosts[0].ip6) / - IP(dst=self.pg0.remote_ip4, src='192.168.1.1') / - UDP(sport=20000, dport=10000)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - capture = capture[0] - self.assertFalse(capture.haslayer(IPv6)) - self.assertEqual(capture[IP].src, self.nat_addr) - self.assertEqual(capture[IP].dst, self.pg0.remote_ip4) - self.assertNotEqual(capture[UDP].sport, 20000) - self.assertEqual(capture[UDP].dport, 10000) - self.assert_packet_checksums_valid(capture) - out_port = capture[UDP].sport - capture = self.pg2.get_capture(1) - self.verify_syslog_apmadd(capture[0][Raw].load, '192.168.1.1', - 20000, self.nat_addr, out_port, - self.pg1.remote_hosts[0].ip6, IP_PROTOS.udp) - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(dst=self.nat_addr, src=self.pg0.remote_ip4) / - UDP(sport=10000, dport=out_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - capture = capture[0] - self.assertEqual(capture[IPv6].src, aftr_ip6) - self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[0].ip6) - self.assertEqual(capture[IP].src, self.pg0.remote_ip4) - self.assertEqual(capture[IP].dst, '192.168.1.1') - self.assertEqual(capture[UDP].sport, 10000) - self.assertEqual(capture[UDP].dport, 20000) - self.assert_packet_checksums_valid(capture) - - # TCP - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(dst=aftr_ip6, src=self.pg1.remote_hosts[1].ip6) / - IP(dst=self.pg0.remote_ip4, src='192.168.1.1') / - TCP(sport=20001, dport=10001)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - capture = capture[0] - self.assertFalse(capture.haslayer(IPv6)) - self.assertEqual(capture[IP].src, self.nat_addr) - self.assertEqual(capture[IP].dst, self.pg0.remote_ip4) - self.assertNotEqual(capture[TCP].sport, 20001) - self.assertEqual(capture[TCP].dport, 10001) - self.assert_packet_checksums_valid(capture) - out_port = capture[TCP].sport - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(dst=self.nat_addr, src=self.pg0.remote_ip4) / - TCP(sport=10001, dport=out_port)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - capture = capture[0] - self.assertEqual(capture[IPv6].src, aftr_ip6) - self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[1].ip6) - self.assertEqual(capture[IP].src, self.pg0.remote_ip4) - self.assertEqual(capture[IP].dst, '192.168.1.1') - self.assertEqual(capture[TCP].sport, 10001) - self.assertEqual(capture[TCP].dport, 20001) - self.assert_packet_checksums_valid(capture) - - # ICMP - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(dst=aftr_ip6, src=self.pg1.remote_hosts[1].ip6) / - IP(dst=self.pg0.remote_ip4, src='192.168.1.1') / - ICMP(id=4000, type='echo-request')) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - capture = capture[0] - self.assertFalse(capture.haslayer(IPv6)) - self.assertEqual(capture[IP].src, self.nat_addr) - self.assertEqual(capture[IP].dst, self.pg0.remote_ip4) - self.assertNotEqual(capture[ICMP].id, 4000) - self.assert_packet_checksums_valid(capture) - out_id = capture[ICMP].id - - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(dst=self.nat_addr, src=self.pg0.remote_ip4) / - ICMP(id=out_id, type='echo-reply')) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - capture = capture[0] - self.assertEqual(capture[IPv6].src, aftr_ip6) - self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[1].ip6) - self.assertEqual(capture[IP].src, self.pg0.remote_ip4) - self.assertEqual(capture[IP].dst, '192.168.1.1') - self.assertEqual(capture[ICMP].id, 4000) - self.assert_packet_checksums_valid(capture) - - # ping DS-Lite AFTR tunnel endpoint address - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(src=self.pg1.remote_hosts[1].ip6, dst=aftr_ip6) / - ICMPv6EchoRequest()) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - capture = capture[0] - self.assertEqual(capture[IPv6].src, aftr_ip6) - self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[1].ip6) - self.assertTrue(capture.haslayer(ICMPv6EchoReply)) - - b4s = self.statistics.get_counter('/dslite/total-b4s') - self.assertEqual(b4s[0][0], 2) - sessions = self.statistics.get_counter('/dslite/total-sessions') - self.assertEqual(sessions[0][0], 3) - - def tearDown(self): - super(TestDSlite, self).tearDown() - - def show_commands_at_teardown(self): - self.logger.info(self.vapi.cli("show dslite pool")) - self.logger.info( - self.vapi.cli("show dslite aftr-tunnel-endpoint-address")) - self.logger.info(self.vapi.cli("show dslite sessions")) - - -class TestDSliteCE(MethodHolder): - """ DS-Lite CE Test Cases """ - - @classmethod - def setUpConstants(cls): - super(TestDSliteCE, cls).setUpConstants() - cls.vpp_cmdline.extend(["nat", "{", "dslite ce", "}"]) - - @classmethod - def setUpClass(cls): - super(TestDSliteCE, cls).setUpClass() - - try: - 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.generate_remote_hosts(1) - cls.pg1.configure_ipv6_neighbors() - - except Exception: - super(TestDSliteCE, cls).tearDownClass() - raise - - @classmethod - def tearDownClass(cls): - super(TestDSliteCE, cls).tearDownClass() - - def test_dslite_ce(self): - """ Test DS-Lite CE """ - - nat_config = self.vapi.nat_show_config() - self.assertEqual(1, nat_config.dslite_ce) - - b4_ip4 = '192.0.0.2' - b4_ip6 = '2001:db8:62aa::375e:f4c1:1' - self.vapi.dslite_set_b4_addr(ip4_addr=b4_ip4, ip6_addr=b4_ip6) - - aftr_ip4 = '192.0.0.1' - aftr_ip6 = '2001:db8:85a3::8a2e:370:1' - aftr_ip6_n = socket.inet_pton(socket.AF_INET6, aftr_ip6) - self.vapi.dslite_set_aftr_addr(ip4_addr=aftr_ip4, ip6_addr=aftr_ip6) - - r1 = VppIpRoute(self, aftr_ip6, 128, - [VppRoutePath(self.pg1.remote_ip6, - self.pg1.sw_if_index)]) - r1.add_vpp_config() - - # UDP encapsulation - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IP(dst=self.pg1.remote_ip4, src=self.pg0.remote_ip4) / - UDP(sport=10000, dport=20000)) - self.pg0.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - capture = capture[0] - self.assertEqual(capture[IPv6].src, b4_ip6) - self.assertEqual(capture[IPv6].dst, aftr_ip6) - self.assertEqual(capture[IP].src, self.pg0.remote_ip4) - self.assertEqual(capture[IP].dst, self.pg1.remote_ip4) - self.assertEqual(capture[UDP].sport, 10000) - self.assertEqual(capture[UDP].dport, 20000) - self.assert_packet_checksums_valid(capture) - - # UDP decapsulation - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(dst=b4_ip6, src=aftr_ip6) / - IP(dst=self.pg0.remote_ip4, src=self.pg1.remote_ip4) / - UDP(sport=20000, dport=10000)) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(1) - capture = capture[0] - self.assertFalse(capture.haslayer(IPv6)) - self.assertEqual(capture[IP].src, self.pg1.remote_ip4) - self.assertEqual(capture[IP].dst, self.pg0.remote_ip4) - self.assertEqual(capture[UDP].sport, 20000) - self.assertEqual(capture[UDP].dport, 10000) - self.assert_packet_checksums_valid(capture) - - # ping DS-Lite B4 tunnel endpoint address - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(src=self.pg1.remote_hosts[0].ip6, dst=b4_ip6) / - ICMPv6EchoRequest()) - self.pg1.add_stream(p) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - capture = capture[0] - self.assertEqual(capture[IPv6].src, b4_ip6) - self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[0].ip6) - self.assertTrue(capture.haslayer(ICMPv6EchoReply)) - - def tearDown(self): - super(TestDSliteCE, self).tearDown() - - def show_commands_at_teardown(self): - self.logger.info( - self.vapi.cli("show dslite aftr-tunnel-endpoint-address")) - self.logger.info( - self.vapi.cli("show dslite b4-tunnel-endpoint-address")) - - -class TestNAT66(MethodHolder): - """ NAT66 Test Cases """ - - @classmethod - def setUpClass(cls): - super(TestNAT66, cls).setUpClass() - - try: - cls.nat_addr = 'fd01:ff::2' - - cls.create_pg_interfaces(range(2)) - cls.interfaces = list(cls.pg_interfaces) - - for i in cls.interfaces: - i.admin_up() - i.config_ip6() - i.configure_ipv6_neighbors() - - except Exception: - super(TestNAT66, cls).tearDownClass() - raise - - @classmethod - def tearDownClass(cls): - super(TestNAT66, cls).tearDownClass() - - def test_static(self): - """ 1:1 NAT66 test """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat66_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat66_add_del_interface(is_add=1, - sw_if_index=self.pg1.sw_if_index) - self.vapi.nat66_add_del_static_mapping( - local_ip_address=self.pg0.remote_ip6n, - external_ip_address=self.nat_addr, - is_add=1) - - # in2out - pkts = [] - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6) / - TCP()) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6) / - UDP()) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6) / - ICMPv6EchoRequest()) - pkts.append(p) - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6) / - GRE() / IP() / TCP()) - pkts.append(p) - self.pg0.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IPv6].src, self.nat_addr) - self.assertEqual(packet[IPv6].dst, self.pg1.remote_ip6) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - # out2in - pkts = [] - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr) / - TCP()) - pkts.append(p) - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr) / - UDP()) - pkts.append(p) - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr) / - ICMPv6EchoReply()) - pkts.append(p) - p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / - IPv6(src=self.pg1.remote_ip6, dst=self.nat_addr) / - GRE() / IP() / TCP()) - pkts.append(p) - self.pg1.add_stream(pkts) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg0.get_capture(len(pkts)) - for packet in capture: - try: - self.assertEqual(packet[IPv6].src, self.pg1.remote_ip6) - self.assertEqual(packet[IPv6].dst, self.pg0.remote_ip6) - self.assert_packet_checksums_valid(packet) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - sm = self.vapi.nat66_static_mapping_dump() - self.assertEqual(len(sm), 1) - self.assertEqual(sm[0].total_pkts, 8) - - def test_check_no_translate(self): - """ NAT66 translate only when egress interface is outside interface """ - flags = self.config_flags.NAT_IS_INSIDE - self.vapi.nat66_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg0.sw_if_index) - self.vapi.nat66_add_del_interface(is_add=1, flags=flags, - sw_if_index=self.pg1.sw_if_index) - self.vapi.nat66_add_del_static_mapping( - local_ip_address=self.pg0.remote_ip6n, - external_ip_address=self.nat_addr, - is_add=1) - - # in2out - p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / - IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6) / - UDP()) - self.pg0.add_stream([p]) - self.pg_enable_capture(self.pg_interfaces) - self.pg_start() - capture = self.pg1.get_capture(1) - packet = capture[0] - try: - self.assertEqual(packet[IPv6].src, self.pg0.remote_ip6) - self.assertEqual(packet[IPv6].dst, self.pg1.remote_ip6) - except: - self.logger.error(ppp("Unexpected or invalid packet:", packet)) - raise - - def clear_nat66(self): - """ - Clear NAT66 configuration. - """ - interfaces = self.vapi.nat66_interface_dump() - for intf in interfaces: - self.vapi.nat66_add_del_interface(is_add=0, flags=intf.flags, - sw_if_index=intf.sw_if_index) - - static_mappings = self.vapi.nat66_static_mapping_dump() - for sm in static_mappings: - self.vapi.nat66_add_del_static_mapping( - local_ip_address=sm.local_ip_address, - external_ip_address=sm.external_ip_address, vrf_id=sm.vrf_id, - is_add=0) - - def tearDown(self): - super(TestNAT66, self).tearDown() - self.clear_nat66() - - def show_commands_at_teardown(self): - self.logger.info(self.vapi.cli("show nat66 interfaces")) - self.logger.info(self.vapi.cli("show nat66 static mappings")) - - -if __name__ == '__main__': - unittest.main(testRunner=VppTestRunner) |