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authorDave Wallace <dwallacelf@gmail.com>2019-08-22 00:32:29 +0000
committerDave Barach <openvpp@barachs.net>2019-08-22 15:33:59 +0000
commita43c93f8554ad7418e31be3791b3fb71232f60ac (patch)
tree50382fdf248809eac59580d8901ff7aef02a8f17 /src/plugins/nat/test/test_nat.py
parent34af0ccf5cf27d8a72119626d2d009222e4ff0a6 (diff)
tests: move plugin tests to src/plugins/*/test
- Relocate plugin tests for 'make test' into src/plugins/*/test so that plugin test cases are co-located with the plugin source code. Type: refactor Signed-off-by: Dave Wallace <dwallacelf@gmail.com> Change-Id: I503e6a43528e14981799b735fa65674155713f67 Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
Diffstat (limited to 'src/plugins/nat/test/test_nat.py')
-rw-r--r--src/plugins/nat/test/test_nat.py9575
1 files changed, 9575 insertions, 0 deletions
diff --git a/src/plugins/nat/test/test_nat.py b/src/plugins/nat/test/test_nat.py
new file mode 100644
index 00000000000..a64b5709c72
--- /dev/null
+++ b/src/plugins/nat/test/test_nat.py
@@ -0,0 +1,9575 @@
+#!/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)