import random
from framework import VppTestCase, VppTestRunner, running_extended_tests
-from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto
from scapy.layers.inet import IP, TCP, UDP, ICMP
from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror
-from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6EchoReply
+from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest, ICMPv6EchoReply, \
+ ICMPv6ND_NS, ICMPv6ND_NA, ICMPv6NDOptDstLLAddr
from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6, IPv6ExtHdrFragment
from scapy.layers.l2 import Ether, ARP, GRE
from scapy.data import IP_PROTOS
class MethodHolder(VppTestCase):
""" NAT create capture and verify method holder """
- @classmethod
- def setUpClass(cls):
- super(MethodHolder, cls).setUpClass()
+ def clear_nat44(self):
+ """
+ Clear NAT44 configuration.
+ """
+ if hasattr(self, 'pg7') and hasattr(self, 'pg8'):
+ # I found no elegant way to do this
+ self.vapi.ip_add_del_route(
+ dst_address=self.pg7.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg7.remote_ip4n,
+ next_hop_sw_if_index=self.pg7.sw_if_index,
+ is_add=0)
+ self.vapi.ip_add_del_route(
+ dst_address=self.pg8.remote_ip4n,
+ dst_address_length=32,
+ next_hop_address=self.pg8.remote_ip4n,
+ next_hop_sw_if_index=self.pg8.sw_if_index,
+ is_add=0)
- def tearDown(self):
- super(MethodHolder, self).tearDown()
+ for intf in [self.pg7, self.pg8]:
+ neighbors = self.vapi.ip_neighbor_dump(intf.sw_if_index)
+ for n in neighbors:
+ self.vapi.ip_neighbor_add_del(intf.sw_if_index,
+ n.mac_address,
+ n.ip_address,
+ is_add=0)
- def check_ip_checksum(self, pkt):
- """
- Check IP checksum of the packet
+ if self.pg7.has_ip4_config:
+ self.pg7.unconfig_ip4()
- :param pkt: Packet to check IP checksum
- """
- new = pkt.__class__(str(pkt))
- del new['IP'].chksum
- new = new.__class__(str(new))
- self.assertEqual(new['IP'].chksum, pkt['IP'].chksum)
+ self.vapi.nat44_forwarding_enable_disable(0)
- def check_tcp_checksum(self, pkt):
- """
- Check TCP checksum in IP packet
+ interfaces = self.vapi.nat44_interface_addr_dump()
+ for intf in interfaces:
+ self.vapi.nat44_add_interface_addr(intf.sw_if_index,
+ twice_nat=intf.twice_nat,
+ is_add=0)
- :param pkt: Packet to check TCP checksum
- """
- new = pkt.__class__(str(pkt))
- del new['TCP'].chksum
- new = new.__class__(str(new))
- self.assertEqual(new['TCP'].chksum, pkt['TCP'].chksum)
+ self.vapi.nat_ipfix(enable=0, src_port=self.ipfix_src_port,
+ domain_id=self.ipfix_domain_id)
+ self.ipfix_src_port = 4739
+ self.ipfix_domain_id = 1
- def check_udp_checksum(self, pkt):
- """
- Check UDP checksum in IP packet
+ interfaces = self.vapi.nat44_interface_dump()
+ for intf in interfaces:
+ if intf.is_inside > 1:
+ self.vapi.nat44_interface_add_del_feature(intf.sw_if_index,
+ 0,
+ is_add=0)
+ self.vapi.nat44_interface_add_del_feature(intf.sw_if_index,
+ intf.is_inside,
+ is_add=0)
- :param pkt: Packet to check UDP checksum
- """
- new = pkt.__class__(str(pkt))
- del new['UDP'].chksum
- new = new.__class__(str(new))
- self.assertEqual(new['UDP'].chksum, pkt['UDP'].chksum)
+ interfaces = self.vapi.nat44_interface_output_feature_dump()
+ for intf in interfaces:
+ self.vapi.nat44_interface_add_del_output_feature(intf.sw_if_index,
+ intf.is_inside,
+ is_add=0)
- def check_icmp_errror_embedded(self, pkt):
- """
- Check ICMP error embeded packet checksum
+ static_mappings = self.vapi.nat44_static_mapping_dump()
+ for sm in static_mappings:
+ self.vapi.nat44_add_del_static_mapping(
+ sm.local_ip_address,
+ sm.external_ip_address,
+ local_port=sm.local_port,
+ external_port=sm.external_port,
+ addr_only=sm.addr_only,
+ vrf_id=sm.vrf_id,
+ protocol=sm.protocol,
+ twice_nat=sm.twice_nat,
+ self_twice_nat=sm.self_twice_nat,
+ out2in_only=sm.out2in_only,
+ tag=sm.tag,
+ external_sw_if_index=sm.external_sw_if_index,
+ is_add=0)
- :param pkt: Packet to check ICMP error embeded packet checksum
- """
- if pkt.haslayer(IPerror):
- new = pkt.__class__(str(pkt))
- del new['IPerror'].chksum
- new = new.__class__(str(new))
- self.assertEqual(new['IPerror'].chksum, pkt['IPerror'].chksum)
-
- if pkt.haslayer(TCPerror):
- new = pkt.__class__(str(pkt))
- del new['TCPerror'].chksum
- new = new.__class__(str(new))
- self.assertEqual(new['TCPerror'].chksum, pkt['TCPerror'].chksum)
-
- if pkt.haslayer(UDPerror):
- if pkt['UDPerror'].chksum != 0:
- new = pkt.__class__(str(pkt))
- del new['UDPerror'].chksum
- new = new.__class__(str(new))
- self.assertEqual(new['UDPerror'].chksum,
- pkt['UDPerror'].chksum)
-
- if pkt.haslayer(ICMPerror):
- del new['ICMPerror'].chksum
- new = new.__class__(str(new))
- self.assertEqual(new['ICMPerror'].chksum, pkt['ICMPerror'].chksum)
-
- def check_icmp_checksum(self, pkt):
+ lb_static_mappings = self.vapi.nat44_lb_static_mapping_dump()
+ for lb_sm in lb_static_mappings:
+ self.vapi.nat44_add_del_lb_static_mapping(
+ lb_sm.external_addr,
+ lb_sm.external_port,
+ lb_sm.protocol,
+ twice_nat=lb_sm.twice_nat,
+ self_twice_nat=lb_sm.self_twice_nat,
+ out2in_only=lb_sm.out2in_only,
+ tag=lb_sm.tag,
+ is_add=0,
+ local_num=0,
+ locals=[])
+
+ identity_mappings = self.vapi.nat44_identity_mapping_dump()
+ for id_m in identity_mappings:
+ self.vapi.nat44_add_del_identity_mapping(
+ addr_only=id_m.addr_only,
+ ip=id_m.ip_address,
+ port=id_m.port,
+ sw_if_index=id_m.sw_if_index,
+ vrf_id=id_m.vrf_id,
+ protocol=id_m.protocol,
+ is_add=0)
+
+ adresses = self.vapi.nat44_address_dump()
+ for addr in adresses:
+ self.vapi.nat44_add_del_address_range(addr.ip_address,
+ addr.ip_address,
+ twice_nat=addr.twice_nat,
+ is_add=0)
+
+ self.vapi.nat_set_reass()
+ self.vapi.nat_set_reass(is_ip6=1)
+ self.verify_no_nat44_user()
+ self.vapi.nat_set_timeouts()
+ self.vapi.nat_set_addr_and_port_alloc_alg()
+
+ def nat44_add_static_mapping(self, local_ip, external_ip='0.0.0.0',
+ local_port=0, external_port=0, vrf_id=0,
+ is_add=1, external_sw_if_index=0xFFFFFFFF,
+ proto=0, twice_nat=0, self_twice_nat=0,
+ out2in_only=0, tag=""):
"""
- Check ICMP checksum in IPv4 packet
+ Add/delete NAT44 static mapping
- :param pkt: Packet to check ICMP checksum
+ :param local_ip: Local IP address
+ :param external_ip: External IP address
+ :param local_port: Local port number (Optional)
+ :param external_port: External port number (Optional)
+ :param vrf_id: VRF ID (Default 0)
+ :param is_add: 1 if add, 0 if delete (Default add)
+ :param external_sw_if_index: External interface instead of IP address
+ :param proto: IP protocol (Mandatory if port specified)
+ :param twice_nat: 1 if translate external host address and port
+ :param self_twice_nat: 1 if translate external host address and port
+ whenever external host address equals
+ local address of internal host
+ :param out2in_only: if 1 rule is matching only out2in direction
+ :param tag: Opaque string tag
"""
- new = pkt.__class__(str(pkt))
- del new['ICMP'].chksum
- new = new.__class__(str(new))
- self.assertEqual(new['ICMP'].chksum, pkt['ICMP'].chksum)
- if pkt.haslayer(IPerror):
- self.check_icmp_errror_embedded(pkt)
-
- def check_icmpv6_checksum(self, pkt):
+ addr_only = 1
+ if local_port and external_port:
+ addr_only = 0
+ l_ip = socket.inet_pton(socket.AF_INET, local_ip)
+ e_ip = socket.inet_pton(socket.AF_INET, external_ip)
+ self.vapi.nat44_add_del_static_mapping(
+ l_ip,
+ e_ip,
+ external_sw_if_index,
+ local_port,
+ external_port,
+ addr_only,
+ vrf_id,
+ proto,
+ twice_nat,
+ self_twice_nat,
+ out2in_only,
+ tag,
+ is_add)
+
+ def nat44_add_address(self, ip, is_add=1, vrf_id=0xFFFFFFFF, twice_nat=0):
"""
- Check ICMPv6 checksum in IPv4 packet
+ Add/delete NAT44 address
- :param pkt: Packet to check ICMPv6 checksum
+ :param ip: IP address
+ :param is_add: 1 if add, 0 if delete (Default add)
+ :param twice_nat: twice NAT address for extenal hosts
"""
- new = pkt.__class__(str(pkt))
- if pkt.haslayer(ICMPv6DestUnreach):
- del new['ICMPv6DestUnreach'].cksum
- new = new.__class__(str(new))
- self.assertEqual(new['ICMPv6DestUnreach'].cksum,
- pkt['ICMPv6DestUnreach'].cksum)
- self.check_icmp_errror_embedded(pkt)
- if pkt.haslayer(ICMPv6EchoRequest):
- del new['ICMPv6EchoRequest'].cksum
- new = new.__class__(str(new))
- self.assertEqual(new['ICMPv6EchoRequest'].cksum,
- pkt['ICMPv6EchoRequest'].cksum)
- if pkt.haslayer(ICMPv6EchoReply):
- del new['ICMPv6EchoReply'].cksum
- new = new.__class__(str(new))
- self.assertEqual(new['ICMPv6EchoReply'].cksum,
- pkt['ICMPv6EchoReply'].cksum)
+ nat_addr = socket.inet_pton(socket.AF_INET, ip)
+ self.vapi.nat44_add_del_address_range(nat_addr, nat_addr, is_add,
+ vrf_id=vrf_id,
+ twice_nat=twice_nat)
def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64):
"""
return pkts
def verify_capture_out(self, capture, nat_ip=None, same_port=False,
- packet_num=3, dst_ip=None, is_ip6=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: Sorce port number is not translated (Default False)
- :param packet_num: Expected number of packets (Default 3)
:param dst_ip: Destination IP address (Default do not verify)
:param is_ip6: If L3 protocol is IPv6 (Default False)
"""
ICMP46 = ICMP
if nat_ip is None:
nat_ip = self.nat_addr
- self.assertEqual(packet_num, len(capture))
for packet in capture:
try:
if not is_ip6:
- self.check_ip_checksum(packet)
+ 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)
self.assertNotEqual(
packet[TCP].sport, self.tcp_port_in)
self.tcp_port_out = packet[TCP].sport
- self.check_tcp_checksum(packet)
+ 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[ICMP46].id, self.icmp_id_in)
self.icmp_id_out = packet[ICMP46].id
- if is_ip6:
- self.check_icmpv6_checksum(packet)
- else:
- self.check_icmp_checksum(packet)
+ 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,
- packet_num=3, dst_ip=None):
+ dst_ip=None):
"""
Verify captured packets on outside network
:param capture: Captured packets
:param nat_ip: Translated IP address
:param same_port: Sorce port number is not translated (Default False)
- :param packet_num: Expected number of packets (Default 3)
:param dst_ip: Destination IP address (Default do not verify)
"""
- return self.verify_capture_out(capture, nat_ip, same_port, packet_num,
- dst_ip, True)
+ return self.verify_capture_out(capture, nat_ip, same_port, dst_ip,
+ True)
- def verify_capture_in(self, capture, in_if, packet_num=3):
+ def verify_capture_in(self, capture, in_if):
"""
Verify captured packets on inside network
:param capture: Captured packets
:param in_if: Inside interface
- :param packet_num: Expected number of packets (Default 3)
"""
- self.assertEqual(packet_num, len(capture))
for packet in capture:
try:
- self.check_ip_checksum(packet)
+ 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)
- self.check_tcp_checksum(packet)
elif packet.haslayer(UDP):
self.assertEqual(packet[UDP].dport, self.udp_port_in)
else:
self.assertEqual(packet[ICMP].id, self.icmp_id_in)
- self.check_icmp_checksum(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet "
"(inside network):", packet))
raise
- def verify_capture_in_ip6(self, capture, src_ip, dst_ip, packet_num=3):
+ 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
- :param packet_num: Expected number of packets (Default 3)
"""
- self.assertEqual(packet_num, len(capture))
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)
- self.check_tcp_checksum(packet)
elif packet.haslayer(UDP):
self.assertEqual(packet[UDP].dport, self.udp_port_in)
- self.check_udp_checksum(packet)
else:
self.assertEqual(packet[ICMPv6EchoReply].id,
self.icmp_id_in)
- self.check_icmpv6_checksum(packet)
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,
- packet_num=3, icmp_type=11):
+ 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 packet_num: Expected number of packets (Default 3)
:param icmp_type: Type of error ICMP packet
we are expecting (Default 11)
"""
if src_ip is None:
src_ip = self.nat_addr
- self.assertEqual(packet_num, len(capture))
for packet in capture:
try:
self.assertEqual(packet[IP].src, src_ip)
"(outside network):", packet))
raise
- def verify_capture_in_with_icmp_errors(self, capture, in_if, packet_num=3,
- icmp_type=11):
+ 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 packet_num: Expected number of packets (Default 3)
:param icmp_type: Type of error ICMP packet
we are expecting (Default 11)
"""
- self.assertEqual(packet_num, len(capture))
for packet in capture:
try:
self.assertEqual(packet[IP].dst, in_if.remote_ip4)
for p in frags:
self.assertEqual(p[IP].src, src)
self.assertEqual(p[IP].dst, dst)
- self.check_ip_checksum(p)
+ self.assert_ip_checksum_valid(p)
buffer.seek(p[IP].frag * 8)
buffer.write(p[IP].payload)
ip = frags[0].getlayer(IP)
proto=frags[0][IP].proto)
if ip.proto == IP_PROTOS.tcp:
p = (ip / TCP(buffer.getvalue()))
- self.check_tcp_checksum(p)
+ self.assert_tcp_checksum_valid(p)
elif ip.proto == IP_PROTOS.udp:
p = (ip / UDP(buffer.getvalue()))
return p
nh=frags[0][IPv6ExtHdrFragment].nh)
if ip.nh == IP_PROTOS.tcp:
p = (ip / TCP(buffer.getvalue()))
- self.check_tcp_checksum(p)
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
# 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)
+
+ 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(ord(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])
+
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.nat_addr_n = socket.inet_pton(socket.AF_INET, cls.nat_addr)
cls.ipfix_src_port = 4739
cls.ipfix_domain_id = 1
+ cls.tcp_external_port = 80
cls.create_pg_interfaces(range(10))
cls.interfaces = list(cls.pg_interfaces[0:4])
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(10, is_add=1)
cls.vapi.ip_table_add_del(20, is_add=1)
super(TestNAT44, cls).tearDownClass()
raise
- def clear_nat44(self):
- """
- Clear NAT44 configuration.
- """
- # I found no elegant way to do this
- self.vapi.ip_add_del_route(dst_address=self.pg7.remote_ip4n,
- dst_address_length=32,
- next_hop_address=self.pg7.remote_ip4n,
- next_hop_sw_if_index=self.pg7.sw_if_index,
- is_add=0)
- self.vapi.ip_add_del_route(dst_address=self.pg8.remote_ip4n,
- dst_address_length=32,
- next_hop_address=self.pg8.remote_ip4n,
- next_hop_sw_if_index=self.pg8.sw_if_index,
- is_add=0)
-
- for intf in [self.pg7, self.pg8]:
- neighbors = self.vapi.ip_neighbor_dump(intf.sw_if_index)
- for n in neighbors:
- self.vapi.ip_neighbor_add_del(intf.sw_if_index,
- n.mac_address,
- n.ip_address,
- is_add=0)
+ def test_dynamic(self):
+ """ NAT44 dynamic translation test """
- if self.pg7.has_ip4_config:
- self.pg7.unconfig_ip4()
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
- interfaces = self.vapi.nat44_interface_addr_dump()
- for intf in interfaces:
- self.vapi.nat44_add_interface_addr(intf.sw_if_index,
- twice_nat=intf.twice_nat,
- is_add=0)
+ # 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)
- self.vapi.nat_ipfix(enable=0, src_port=self.ipfix_src_port,
- domain_id=self.ipfix_domain_id)
- self.ipfix_src_port = 4739
- self.ipfix_domain_id = 1
+ # 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)
- interfaces = self.vapi.nat44_interface_dump()
- for intf in interfaces:
- if intf.is_inside > 1:
- self.vapi.nat44_interface_add_del_feature(intf.sw_if_index,
- 0,
- is_add=0)
- self.vapi.nat44_interface_add_del_feature(intf.sw_if_index,
- intf.is_inside,
- is_add=0)
+ def test_dynamic_icmp_errors_in2out_ttl_1(self):
+ """ NAT44 handling of client packets with TTL=1 """
- interfaces = self.vapi.nat44_interface_output_feature_dump()
- for intf in interfaces:
- self.vapi.nat44_interface_add_del_output_feature(intf.sw_if_index,
- intf.is_inside,
- is_add=0)
-
- static_mappings = self.vapi.nat44_static_mapping_dump()
- for sm in static_mappings:
- self.vapi.nat44_add_del_static_mapping(
- sm.local_ip_address,
- sm.external_ip_address,
- local_port=sm.local_port,
- external_port=sm.external_port,
- addr_only=sm.addr_only,
- vrf_id=sm.vrf_id,
- protocol=sm.protocol,
- twice_nat=sm.twice_nat,
- is_add=0)
-
- lb_static_mappings = self.vapi.nat44_lb_static_mapping_dump()
- for lb_sm in lb_static_mappings:
- self.vapi.nat44_add_del_lb_static_mapping(
- lb_sm.external_addr,
- lb_sm.external_port,
- lb_sm.protocol,
- vrf_id=lb_sm.vrf_id,
- twice_nat=lb_sm.twice_nat,
- is_add=0,
- local_num=0,
- locals=[])
-
- identity_mappings = self.vapi.nat44_identity_mapping_dump()
- for id_m in identity_mappings:
- self.vapi.nat44_add_del_identity_mapping(
- addr_only=id_m.addr_only,
- ip=id_m.ip_address,
- port=id_m.port,
- sw_if_index=id_m.sw_if_index,
- vrf_id=id_m.vrf_id,
- protocol=id_m.protocol,
- is_add=0)
-
- adresses = self.vapi.nat44_address_dump()
- for addr in adresses:
- self.vapi.nat44_add_del_address_range(addr.ip_address,
- addr.ip_address,
- twice_nat=addr.twice_nat,
- is_add=0)
-
- self.vapi.nat_set_reass()
- self.vapi.nat_set_reass(is_ip6=1)
-
- def nat44_add_static_mapping(self, local_ip, external_ip='0.0.0.0',
- local_port=0, external_port=0, vrf_id=0,
- is_add=1, external_sw_if_index=0xFFFFFFFF,
- proto=0, twice_nat=0):
- """
- Add/delete NAT44 static mapping
-
- :param local_ip: Local IP address
- :param external_ip: External IP address
- :param local_port: Local port number (Optional)
- :param external_port: External port number (Optional)
- :param vrf_id: VRF ID (Default 0)
- :param is_add: 1 if add, 0 if delete (Default add)
- :param external_sw_if_index: External interface instead of IP address
- :param proto: IP protocol (Mandatory if port specified)
- :param twice_nat: 1 if translate external host address and port
- """
- addr_only = 1
- if local_port and external_port:
- addr_only = 0
- l_ip = socket.inet_pton(socket.AF_INET, local_ip)
- e_ip = socket.inet_pton(socket.AF_INET, external_ip)
- self.vapi.nat44_add_del_static_mapping(
- l_ip,
- e_ip,
- external_sw_if_index,
- local_port,
- external_port,
- addr_only,
- vrf_id,
- proto,
- twice_nat,
- is_add)
-
- def nat44_add_address(self, ip, is_add=1, vrf_id=0xFFFFFFFF, twice_nat=0):
- """
- Add/delete NAT44 address
-
- :param ip: IP address
- :param is_add: 1 if add, 0 if delete (Default add)
- :param twice_nat: twice NAT address for extenal hosts
- """
- nat_addr = socket.inet_pton(socket.AF_INET, ip)
- self.vapi.nat44_add_del_address_range(nat_addr, nat_addr, is_add,
- vrf_id=vrf_id,
- twice_nat=twice_nat)
-
- def test_dynamic(self):
- """ NAT44 dynamic translation test """
-
- self.nat44_add_address(self.nat_addr)
- self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
- self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
- is_inside=0)
-
- # in2out
- pkts = self.create_stream_in(self.pg0, self.pg1)
- self.pg0.add_stream(pkts)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.pg1.get_capture(len(pkts))
- self.verify_capture_out(capture)
-
- # out2in
- pkts = self.create_stream_out(self.pg1)
- self.pg1.add_stream(pkts)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.pg0.get_capture(len(pkts))
- self.verify_capture_in(capture, self.pg0)
-
- def test_dynamic_icmp_errors_in2out_ttl_1(self):
- """ NAT44 handling of client packets with TTL=1 """
-
- self.nat44_add_address(self.nat_addr)
- self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
- self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
- is_inside=0)
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
# Client side - generate traffic
pkts = self.create_stream_in(self.pg0, self.pg1, ttl=1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(len(pkts))
- self.assertEqual(1, len(capture))
packet = capture[0]
try:
self.assertEqual(packet[IP].src, self.pg1.local_ip4)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg0.get_capture(1)
- self.verify_capture_in(capture, self.pg0, packet_num=1)
+ self.verify_capture_in(capture, self.pg0)
self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp)
# in2out
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(1)
- self.verify_capture_out(capture, same_port=True, packet_num=1)
+ self.verify_capture_out(capture, same_port=True)
self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp)
def test_forwarding(self):
external_ip=alias_ip)
try:
- # in2out - static mapping match
+ # static mapping match
pkts = self.create_stream_out(self.pg1)
self.pg1.add_stream(pkts)
capture = self.pg1.get_capture(len(pkts))
self.verify_capture_out(capture, same_port=True)
- # in2out - no static mapping match
+ # no static mapping match
host0 = self.pg0.remote_hosts[0]
self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
+ sm = self.vapi.nat44_static_mapping_dump()
+ self.assertEqual(len(sm), 1)
+ self.assertEqual((sm[0].tag).split('\0', 1)[0], '')
+ 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.tcp_port_out = 6303
self.udp_port_out = 6304
self.icmp_id_out = 6305
+ tag = "testTAG"
- self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip, tag=tag)
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
+ sm = self.vapi.nat44_static_mapping_dump()
+ self.assertEqual(len(sm), 1)
+ self.assertEqual((sm[0].tag).split('\0', 1)[0], tag)
# out2in
pkts = self.create_stream_out(self.pg1, nat_ip)
self.pg_start()
self.pg3.assert_nothing_captured()
- def test_identity_nat(self):
- """ Identity NAT """
+ 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.vapi.nat44_add_del_identity_mapping(ip=self.pg0.remote_ip4n)
+ self.nat44_add_address(self.nat_addr)
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
- 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)
+ # 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.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.check_tcp_checksum(p)
- self.check_ip_checksum(p)
- except:
- self.logger.error(ppp("Unexpected or invalid packet:", p))
- raise
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture)
- def test_static_lb(self):
- """ NAT44 local service load balancing """
- external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr)
- external_port = 80
- local_port = 8080
- server1 = self.pg0.remote_hosts[0]
- server2 = self.pg0.remote_hosts[1]
+ # 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)
- locals = [{'addr': server1.ip4n,
- 'port': local_port,
- 'probability': 70},
- {'addr': server2.ip4n,
- 'port': local_port,
- 'probability': 30}]
+ def test_identity_nat(self):
+ """ Identity NAT """
- self.nat44_add_address(self.nat_addr)
- self.vapi.nat44_add_del_lb_static_mapping(external_addr_n,
- external_port,
- IP_PROTOS.tcp,
- local_num=len(locals),
- locals=locals)
+ self.vapi.nat44_add_del_identity_mapping(ip=self.pg0.remote_ip4n)
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
- # from client to service
p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
- IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
- TCP(sport=12345, dport=external_port))
+ 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]
- 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.check_tcp_checksum(p)
- self.check_ip_checksum(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.check_tcp_checksum(p)
- self.check_ip_checksum(p)
+ 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
- # multiple clients
- server1_n = 0
- server2_n = 0
- clients = ip4_range(self.pg1.remote_ip4, 10, 20)
- pkts = []
- for client in clients:
- p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
- IP(src=client, dst=self.nat_addr) /
- TCP(sport=12345, dport=external_port))
- pkts.append(p)
- self.pg1.add_stream(pkts)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.pg0.get_capture(len(pkts))
- for p in capture:
- if p[IP].dst == server1.ip4:
- server1_n += 1
- else:
- server2_n += 1
- self.assertTrue(server1_n > server2_n)
-
def test_multiple_inside_interfaces(self):
""" NAT44 multiple non-overlapping address space inside interfaces """
self.assertTrue(session.protocol in
[IP_PROTOS.tcp, IP_PROTOS.udp,
IP_PROTOS.icmp])
+ self.assertFalse(session.ext_host_valid)
# pg4 session dump
sessions = self.vapi.nat44_user_session_dump(self.pg4.remote_ip4n, 10)
self.assertEqual(ip.dst, server.ip4)
self.assertNotEqual(tcp.sport, host_in_port)
self.assertEqual(tcp.dport, server_in_port)
- self.check_tcp_checksum(p)
+ self.assert_packet_checksums_valid(p)
host_out_port = tcp.sport
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
self.assertEqual(ip.dst, host.ip4)
self.assertEqual(tcp.sport, server_out_port)
self.assertEqual(tcp.dport, host_in_port)
- self.check_tcp_checksum(p)
+ self.assert_packet_checksums_valid(p)
except:
- self.logger.error(ppp("Unexpected or invalid packet:"), p)
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
def test_hairpinning2(self):
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.check_tcp_checksum(packet)
+ 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)
if packet.haslayer(TCP):
self.assertEqual(packet[TCP].dport, self.tcp_port_in)
self.assertEqual(packet[TCP].sport, server_tcp_port)
- self.check_tcp_checksum(packet)
+ 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)
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.check_tcp_checksum(packet)
+ 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)
if packet.haslayer(TCP):
self.assertEqual(packet[TCP].dport, self.tcp_port_in)
self.assertEqual(packet[TCP].sport, server_tcp_port)
- self.check_tcp_checksum(packet)
+ 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)
# 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_interface_addr(self.pg7.sw_if_index)
def test_interface_addr_static_mapping(self):
""" Static mapping with addresses from interface """
+ tag = "testTAG"
+
self.vapi.nat44_add_interface_addr(self.pg7.sw_if_index)
self.nat44_add_static_mapping(
'1.2.3.4',
- external_sw_if_index=self.pg7.sw_if_index)
+ 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('\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(1, len(static_mappings))
- self.assertEqual(static_mappings[0].external_ip_address[0:4],
- self.pg7.local_ip4n)
- self.assertEqual(0xFFFFFFFF, static_mappings[0].external_sw_if_index)
+ self.assertEqual(2, len(static_mappings))
+ resolved = False
+ for sm in static_mappings:
+ if sm.external_sw_if_index == 0xFFFFFFFF:
+ self.assertEqual(sm.external_ip_address[0:4],
+ self.pg7.local_ip4n)
+ self.assertEqual((sm.tag).split('\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('\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(sm.external_ip_address[0:4],
+ self.pg7.local_ip4n)
+ self.assertEqual((sm.tag).split('\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):
# configure interface address and check identity mappings
self.pg7.config_ip4()
identity_mappings = self.vapi.nat44_identity_mapping_dump()
- self.assertEqual(1, len(identity_mappings))
- self.assertEqual(identity_mappings[0].ip_address,
- self.pg7.local_ip4n)
- self.assertEqual(0xFFFFFFFF, identity_mappings[0].sw_if_index)
- self.assertEqual(port, identity_mappings[0].port)
- self.assertEqual(IP_PROTOS.tcp, identity_mappings[0].protocol)
+ resolved = False
+ self.assertEqual(2, len(identity_mappings))
+ for sm in identity_mappings:
+ if sm.sw_if_index == 0xFFFFFFFF:
+ self.assertEqual(identity_mappings[0].ip_address,
+ self.pg7.local_ip4n)
+ 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(0, len(identity_mappings))
-
+ 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/delted """
self.ipfix_domain_id = 10
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture(0)
+ self.pg1.assert_nothing_captured()
+ sleep(1)
self.vapi.cli("ipfix flush") # FIXME this should be an API call
capture = self.pg3.get_capture(9)
ipfix = IPFIXDecoder()
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- self.pg1.get_capture(0)
+ self.pg1.assert_nothing_captured()
+ sleep(1)
self.vapi.cli("ipfix flush") # FIXME this should be an API call
capture = self.pg3.get_capture(9)
ipfix = IPFIXDecoder()
self.pg2.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture(0)
+ self.pg1.assert_nothing_captured()
# remove addresses and verify
self.nat44_add_address(self.nat_addr, is_add=0)
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture(0)
+ 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,
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture(0)
+ self.pg1.assert_nothing_captured()
def test_vrf_mode(self):
""" NAT44 tenant VRF aware address pool mode """
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)
self.vapi.nat44_interface_add_del_feature(self.pg2.sw_if_index,
is_inside=0)
- # 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)
+ 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)
+ # 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)
- self.pg0.unconfig_ip4()
- self.pg1.unconfig_ip4()
- self.pg0.set_table_ip4(0)
- self.pg1.set_table_ip4(0)
- self.vapi.ip_table_add_del(vrf_id1, is_add=0)
- self.vapi.ip_table_add_del(vrf_id2, is_add=0)
+ 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(vrf_id1, is_add=0)
+ self.vapi.ip_table_add_del(vrf_id2, is_add=0)
def test_vrf_feature_independent(self):
""" NAT44 tenant VRF independent address pool mode """
self.assertEqual(packet[IP].src, nat_ip)
self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
self.assertTrue(packet.haslayer(GRE))
- self.check_ip_checksum(packet)
+ self.assert_packet_checksums_valid(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
self.assertEqual(packet[IP].src, self.pg1.remote_ip4)
self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
self.assertTrue(packet.haslayer(GRE))
- self.check_ip_checksum(packet)
+ self.assert_packet_checksums_valid(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
self.assertEqual(packet[IP].src, host_nat_ip)
self.assertEqual(packet[IP].dst, server.ip4)
self.assertTrue(packet.haslayer(GRE))
- self.check_ip_checksum(packet)
+ self.assert_packet_checksums_valid(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
self.assertEqual(packet[IP].src, server_nat_ip)
self.assertEqual(packet[IP].dst, host.ip4)
self.assertTrue(packet.haslayer(GRE))
- self.check_ip_checksum(packet)
- except:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
-
- def test_unknown_proto(self):
- """ NAT44 translate packet with unknown protocol """
- self.nat44_add_address(self.nat_addr)
- self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
- self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
- is_inside=0)
-
- # in2out
- p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
- IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
- TCP(sport=self.tcp_port_in, dport=20))
- self.pg0.add_stream(p)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- p = self.pg1.get_capture(1)
-
- p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
- IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
- GRE() /
- IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) /
- TCP(sport=1234, dport=1234))
- self.pg0.add_stream(p)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- p = self.pg1.get_capture(1)
- packet = p[0]
- try:
- self.assertEqual(packet[IP].src, self.nat_addr)
- self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
- self.assertTrue(packet.haslayer(GRE))
- self.check_ip_checksum(packet)
- except:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
-
- # out2in
- p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
- IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
- GRE() /
- IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) /
- TCP(sport=1234, dport=1234))
- self.pg1.add_stream(p)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- p = self.pg0.get_capture(1)
- packet = p[0]
- try:
- self.assertEqual(packet[IP].src, self.pg1.remote_ip4)
- self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
- self.assertTrue(packet.haslayer(GRE))
- self.check_ip_checksum(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
- host_out_port = 0
- server_in_port = 5678
- server_out_port = 8765
- server_nat_ip = "10.0.0.11"
-
- self.nat44_add_address(self.nat_addr)
- self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
- self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
- is_inside=0)
-
- # add static mapping for server
- self.nat44_add_static_mapping(server.ip4, server_nat_ip)
-
- # host to server
- p = (Ether(src=host.mac, dst=self.pg0.local_mac) /
- IP(src=host.ip4, dst=server_nat_ip) /
- TCP(sport=host_in_port, dport=server_out_port))
- self.pg0.add_stream(p)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.pg0.get_capture(1)
-
- p = (Ether(dst=self.pg0.local_mac, src=host.mac) /
- IP(src=host.ip4, dst=server_nat_ip) /
- GRE() /
- IP(src=self.pg2.remote_ip4, dst=self.pg3.remote_ip4) /
- TCP(sport=1234, dport=1234))
- self.pg0.add_stream(p)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- p = self.pg0.get_capture(1)
- packet = p[0]
- try:
- self.assertEqual(packet[IP].src, self.nat_addr)
- self.assertEqual(packet[IP].dst, server.ip4)
- self.assertTrue(packet.haslayer(GRE))
- self.check_ip_checksum(packet)
- except:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
-
- # server to host
- p = (Ether(dst=self.pg0.local_mac, src=server.mac) /
- IP(src=server.ip4, dst=self.nat_addr) /
- GRE() /
- IP(src=self.pg3.remote_ip4, dst=self.pg2.remote_ip4) /
- TCP(sport=1234, dport=1234))
- self.pg0.add_stream(p)
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- p = self.pg0.get_capture(1)
- packet = p[0]
- try:
- self.assertEqual(packet[IP].src, server_nat_ip)
- self.assertEqual(packet[IP].dst, host.ip4)
- self.assertTrue(packet.haslayer(GRE))
- self.check_ip_checksum(packet)
+ self.assert_packet_checksums_valid(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
self.assertEqual(ip.dst, server.ip4)
self.assertNotEqual(tcp.sport, host_in_port)
self.assertEqual(tcp.dport, server_in_port)
- self.check_tcp_checksum(p)
+ self.assert_packet_checksums_valid(p)
host_out_port = tcp.sport
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
self.assertEqual(ip.dst, host.ip4)
self.assertEqual(tcp.sport, server_out_port)
self.assertEqual(tcp.dport, host_in_port)
- self.check_tcp_checksum(p)
+ self.assert_packet_checksums_valid(p)
except:
- self.logger.error(ppp("Unexpected or invalid packet:"), p)
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
def test_one_armed_nat44(self):
self.assertNotEqual(tcp.sport, 12345)
external_port = tcp.sport
self.assertEqual(tcp.dport, 80)
- self.check_tcp_checksum(p)
- self.check_ip_checksum(p)
+ self.assert_packet_checksums_valid(p)
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
self.assertEqual(ip.dst, local_host.ip4)
self.assertEqual(tcp.sport, 80)
self.assertEqual(tcp.dport, 12345)
- self.check_tcp_checksum(p)
- self.check_ip_checksum(p)
+ self.assert_packet_checksums_valid(p)
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg1.get_capture(len(pkts))
+ self.pg1.get_capture(len(pkts))
sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0)
nsessions = len(sessions)
sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0)
self.assertEqual(nsessions - len(sessions), 2)
+ self.vapi.nat44_del_session(sessions[0].inside_ip_address,
+ sessions[0].inside_port,
+ sessions[0].protocol)
+
+ self.verify_no_nat44_user()
+
def test_set_get_reass(self):
""" NAT44 set/get virtual fragmentation reassembly """
reas_cfg1 = self.vapi.nat_get_reass()
def test_reass_hairpinning(self):
""" NAT44 fragments hairpinning """
- host = self.pg0.remote_hosts[0]
server = self.pg0.remote_hosts[1]
host_in_port = random.randint(1025, 65535)
- host_out_port = 0
server_in_port = random.randint(1025, 65535)
server_out_port = random.randint(1025, 65535)
data = "A" * 4 + "B" * 16 + "C" * 3
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
- self.vapi.cli("nat addr-port-assignment-alg map-e psid 10 "
- "psid-offset 6 psid-len 6")
+ 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) /
self.assertEqual(tcp.dport, 22)
self.assertNotEqual(tcp.sport, 4567)
self.assertEqual((tcp.sport >> 6) & 63, 10)
- self.check_tcp_checksum(p)
- self.check_ip_checksum(p)
+ self.assert_packet_checksums_valid(p)
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
- def test_twice_nat(self):
- """ Twice NAT44 """
- twice_nat_addr = '10.0.1.3'
- port_in = 8080
- port_out = 80
- eh_port_out = 4567
- eh_port_in = 0
+ def test_port_range(self):
+ """ External address port range """
self.nat44_add_address(self.nat_addr)
- self.nat44_add_address(twice_nat_addr, twice_nat=1)
- self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
- port_in, port_out, proto=IP_PROTOS.tcp,
- twice_nat=1)
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
+ self.vapi.nat_set_addr_and_port_alloc_alg(alg=2,
+ start_port=1025,
+ end_port=1027)
- p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
- IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
- TCP(sport=eh_port_out, dport=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]
- self.assertEqual(ip.dst, self.pg0.remote_ip4)
- self.assertEqual(ip.src, twice_nat_addr)
- self.assertEqual(tcp.dport, port_in)
- self.assertNotEqual(tcp.sport, eh_port_out)
- eh_port_in = tcp.sport
- self.check_tcp_checksum(p)
- self.check_ip_checksum(p)
- except:
- self.logger.error(ppp("Unexpected or invalid packet:", p))
- raise
-
- p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
- IP(src=self.pg0.remote_ip4, dst=twice_nat_addr) /
- TCP(sport=port_in, dport=eh_port_in))
- self.pg0.add_stream(p)
+ 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(1)
- p = capture[0]
- try:
- ip = p[IP]
+ capture = self.pg1.get_capture(3)
+ for p in capture:
tcp = p[TCP]
- self.assertEqual(ip.dst, self.pg1.remote_ip4)
- self.assertEqual(ip.src, self.nat_addr)
- self.assertEqual(tcp.dport, eh_port_out)
- self.assertEqual(tcp.sport, port_out)
- self.check_tcp_checksum(p)
- self.check_ip_checksum(p)
- except:
- self.logger.error(ppp("Unexpected or invalid packet:", p))
- raise
-
- def test_twice_nat_lb(self):
- """ Twice NAT44 local service load balancing """
- external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr)
- twice_nat_addr = '10.0.1.3'
- local_port = 8080
- external_port = 80
- eh_port_out = 4567
- eh_port_in = 0
- server1 = self.pg0.remote_hosts[0]
- server2 = self.pg0.remote_hosts[1]
-
- locals = [{'addr': server1.ip4n,
- 'port': local_port,
- 'probability': 50},
- {'addr': server2.ip4n,
- 'port': local_port,
- 'probability': 50}]
+ 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)
- self.nat44_add_address(twice_nat_addr, twice_nat=1)
-
- self.vapi.nat44_add_del_lb_static_mapping(external_addr_n,
- external_port,
- IP_PROTOS.tcp,
- twice_nat=1,
- local_num=len(locals),
- locals=locals)
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
+ self.vapi.nat_set_reass(max_frag=0)
+ self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n,
+ src_address=self.pg3.local_ip4n,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.nat_ipfix(domain_id=self.ipfix_domain_id,
+ src_port=self.ipfix_src_port)
- p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
- IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
- TCP(sport=eh_port_out, dport=external_port))
- self.pg1.add_stream(p)
+ data = "A" * 4 + "B" * 16 + "C" * 3
+ self.tcp_port_in = random.randint(1025, 65535)
+ pkts = self.create_stream_frag(self.pg0,
+ self.pg1.remote_ip4,
+ self.tcp_port_in,
+ 20,
+ data)
+ self.pg0.add_stream(pkts[-1])
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- capture = self.pg0.get_capture(1)
- p = capture[0]
- server = None
- try:
- ip = p[IP]
- tcp = p[TCP]
- self.assertEqual(ip.src, twice_nat_addr)
- self.assertIn(ip.dst, [server1.ip4, server2.ip4])
- if ip.dst == server1.ip4:
- server = server1
+ self.pg1.assert_nothing_captured()
+ sleep(1)
+ self.vapi.cli("ipfix flush") # FIXME this should be an API call
+ capture = self.pg3.get_capture(9)
+ ipfix = IPFIXDecoder()
+ # first load template
+ for p in capture:
+ self.assertTrue(p.haslayer(IPFIX))
+ self.assertEqual(p[IP].src, self.pg3.local_ip4)
+ self.assertEqual(p[IP].dst, self.pg3.remote_ip4)
+ self.assertEqual(p[UDP].sport, self.ipfix_src_port)
+ self.assertEqual(p[UDP].dport, 4739)
+ self.assertEqual(p[IPFIX].observationDomainID,
+ self.ipfix_domain_id)
+ if p.haslayer(Template):
+ ipfix.add_template(p.getlayer(Template))
+ # verify events in data set
+ for p in capture:
+ if p.haslayer(Data):
+ data = ipfix.decode_data_set(p.getlayer(Set))
+ self.verify_ipfix_max_fragments_ip4(data, 0,
+ self.pg0.remote_ip4n)
+
+ def test_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(vrf_id1, is_add=1)
+ self.vapi.ip_table_add_del(vrf_id2, is_add=1)
+ 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)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_feature(self.pg2.sw_if_index,
+ is_inside=0)
+
+ 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.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)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.vapi.nat_set_timeouts(udp=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) /
+ 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 tearDown(self):
+ super(TestNAT44, self).tearDown()
+ if not self.vpp_dead:
+ self.logger.info(self.vapi.cli("show nat44 addresses"))
+ self.logger.info(self.vapi.cli("show nat44 interfaces"))
+ self.logger.info(self.vapi.cli("show nat44 static mappings"))
+ self.logger.info(self.vapi.cli("show nat44 interface address"))
+ self.logger.info(self.vapi.cli("show nat44 sessions detail"))
+ self.logger.info(self.vapi.cli("show nat virtual-reassembly"))
+ self.logger.info(self.vapi.cli("show nat44 hash tables detail"))
+ self.logger.info(self.vapi.cli("show nat timeouts"))
+ self.logger.info(
+ self.vapi.cli("show nat addr-port-assignment-alg"))
+ self.clear_nat44()
+ self.vapi.cli("clear logging")
+
+
+class TestNAT44EndpointDependent(MethodHolder):
+ """ Endpoint-Dependent mapping and filtering test cases """
+
+ @classmethod
+ def setUpConstants(cls):
+ super(TestNAT44EndpointDependent, cls).setUpConstants()
+ cls.vpp_cmdline.extend(["nat", "{", "endpoint-dependent", "}"])
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestNAT44EndpointDependent, cls).setUpClass()
+ cls.vapi.cli("set log class nat level debug")
+ try:
+ cls.tcp_port_in = 6303
+ cls.tcp_port_out = 6303
+ cls.udp_port_in = 6304
+ cls.udp_port_out = 6304
+ cls.icmp_id_in = 6305
+ cls.icmp_id_out = 6305
+ cls.nat_addr = '10.0.0.3'
+ cls.nat_addr_n = socket.inet_pton(socket.AF_INET, cls.nat_addr)
+ cls.ipfix_src_port = 4739
+ cls.ipfix_domain_id = 1
+ cls.tcp_external_port = 80
+
+ cls.create_pg_interfaces(range(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()
+ ip_addr_n = socket.inet_pton(socket.AF_INET, "10.0.0.1")
+ cls.vapi.sw_interface_add_del_address(cls.pg4.sw_if_index,
+ ip_addr_n,
+ 24)
+ cls.pg4.admin_up()
+ cls.pg4.resolve_arp()
+ cls.pg4._remote_hosts[1]._ip4 = cls.pg4._remote_hosts[0]._ip4
+ cls.pg4.resolve_arp()
+
+ zero_ip4n = socket.inet_pton(socket.AF_INET, "0.0.0.0")
+ cls.vapi.ip_table_add_del(1, is_add=1)
+
+ cls.pg5._local_ip4 = "10.1.1.1"
+ cls.pg5._local_ip4n = socket.inet_pton(socket.AF_INET,
+ cls.pg5.local_ip4)
+ 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()
+ cls.vapi.ip_add_del_route(dst_address=cls.pg5.remote_ip4n,
+ dst_address_length=32,
+ table_id=1,
+ next_hop_sw_if_index=cls.pg5.sw_if_index,
+ next_hop_address=zero_ip4n)
+
+ cls.pg6._local_ip4 = "10.1.2.1"
+ cls.pg6._local_ip4n = socket.inet_pton(socket.AF_INET,
+ cls.pg6.local_ip4)
+ 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()
+ cls.vapi.ip_add_del_route(dst_address=cls.pg6.remote_ip4n,
+ dst_address_length=32,
+ table_id=1,
+ next_hop_sw_if_index=cls.pg6.sw_if_index,
+ next_hop_address=zero_ip4n)
+
+ cls.vapi.ip_add_del_route(dst_address=cls.pg6.remote_ip4n,
+ dst_address_length=16,
+ next_hop_address=zero_ip4n,
+ table_id=0,
+ next_hop_table_id=1)
+ cls.vapi.ip_add_del_route(dst_address=zero_ip4n,
+ dst_address_length=0,
+ next_hop_address=zero_ip4n,
+ table_id=1,
+ next_hop_table_id=0)
+ cls.vapi.ip_add_del_route(dst_address=zero_ip4n,
+ dst_address_length=0,
+ table_id=0,
+ next_hop_sw_if_index=cls.pg1.sw_if_index,
+ next_hop_address=cls.pg1.local_ip4n)
+
+ cls.pg5.resolve_arp()
+ cls.pg6.resolve_arp()
+
+ except Exception:
+ super(TestNAT44EndpointDependent, cls).tearDownClass()
+ raise
+
+ def test_dynamic(self):
+ """ NAT44 dynamic translation test """
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ nat_config = self.vapi.nat_show_config()
+ self.assertEqual(1, nat_config.endpoint_dependent)
+
+ # in2out
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+
+ # out2in
+ pkts = self.create_stream_out(self.pg1)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+
+ def test_forwarding(self):
+ """ NAT44 forwarding test """
+
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_forwarding_enable_disable(1)
+
+ real_ip = self.pg0.remote_ip4n
+ alias_ip = self.nat_addr_n
+ self.vapi.nat44_add_del_static_mapping(local_ip=real_ip,
+ external_ip=alias_ip)
+
+ try:
+ # in2out - static mapping match
+
+ pkts = self.create_stream_out(self.pg1)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, same_port=True)
+
+ # in2out - no static mapping match
+
+ host0 = self.pg0.remote_hosts[0]
+ self.pg0.remote_hosts[0] = self.pg0.remote_hosts[1]
+ try:
+ pkts = self.create_stream_out(self.pg1,
+ dst_ip=self.pg0.remote_ip4,
+ use_inside_ports=True)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
+ same_port=True)
+ finally:
+ self.pg0.remote_hosts[0] = host0
+
+ user = self.pg0.remote_hosts[1]
+ sessions = self.vapi.nat44_user_session_dump(user.ip4n, 0)
+ self.assertEqual(len(sessions), 3)
+ self.assertTrue(sessions[0].ext_host_valid)
+ self.vapi.nat44_del_session(
+ sessions[0].inside_ip_address,
+ sessions[0].inside_port,
+ sessions[0].protocol,
+ ext_host_address=sessions[0].ext_host_address,
+ ext_host_port=sessions[0].ext_host_port)
+ sessions = self.vapi.nat44_user_session_dump(user.ip4n, 0)
+ self.assertEqual(len(sessions), 2)
+
+ finally:
+ self.vapi.nat44_forwarding_enable_disable(0)
+ self.vapi.nat44_add_del_static_mapping(local_ip=real_ip,
+ external_ip=alias_ip,
+ is_add=0)
+
+ def test_static_lb(self):
+ """ NAT44 local service load balancing """
+ external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr)
+ external_port = 80
+ local_port = 8080
+ server1 = self.pg0.remote_hosts[0]
+ server2 = self.pg0.remote_hosts[1]
+
+ locals = [{'addr': server1.ip4n,
+ 'port': local_port,
+ 'probability': 70,
+ '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(external_addr_n,
+ external_port,
+ IP_PROTOS.tcp,
+ local_num=len(locals),
+ locals=locals)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # from client to service
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=12345, dport=external_port))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ server = None
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertIn(ip.dst, [server1.ip4, server2.ip4])
+ if ip.dst == server1.ip4:
+ server = server1
+ else:
+ server = server2
+ self.assertEqual(tcp.dport, local_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from service back to client
+ p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
+ IP(src=server.ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=local_port, dport=12345))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.nat_addr)
+ self.assertEqual(tcp.sport, external_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ sessions = self.vapi.nat44_user_session_dump(server.ip4n, 0)
+ self.assertEqual(len(sessions), 1)
+ self.assertTrue(sessions[0].ext_host_valid)
+ self.vapi.nat44_del_session(
+ sessions[0].inside_ip_address,
+ sessions[0].inside_port,
+ sessions[0].protocol,
+ ext_host_address=sessions[0].ext_host_address,
+ ext_host_port=sessions[0].ext_host_port)
+ sessions = self.vapi.nat44_user_session_dump(server.ip4n, 0)
+ self.assertEqual(len(sessions), 0)
+
+ @unittest.skipUnless(running_extended_tests(), "part of extended tests")
+ def test_static_lb_multi_clients(self):
+ """ NAT44 local service load balancing - multiple clients"""
+
+ external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr)
+ external_port = 80
+ local_port = 8080
+ server1 = self.pg0.remote_hosts[0]
+ server2 = self.pg0.remote_hosts[1]
+
+ locals = [{'addr': server1.ip4n,
+ 'port': local_port,
+ 'probability': 90,
+ '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(external_addr_n,
+ external_port,
+ IP_PROTOS.tcp,
+ local_num=len(locals),
+ locals=locals)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ server1_n = 0
+ server2_n = 0
+ clients = ip4_range(self.pg1.remote_ip4, 10, 50)
+ pkts = []
+ for client in clients:
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=client, dst=self.nat_addr) /
+ TCP(sport=12345, dport=external_port))
+ pkts.append(p)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ for p in capture:
+ if p[IP].dst == server1.ip4:
+ server1_n += 1
+ else:
+ server2_n += 1
+ self.assertTrue(server1_n > server2_n)
+
+ def test_static_lb_2(self):
+ """ NAT44 local service load balancing (asymmetrical rule) """
+ external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr)
+ external_port = 80
+ local_port = 8080
+ server1 = self.pg0.remote_hosts[0]
+ server2 = self.pg0.remote_hosts[1]
+
+ locals = [{'addr': server1.ip4n,
+ 'port': local_port,
+ 'probability': 70,
+ 'vrf_id': 0},
+ {'addr': server2.ip4n,
+ 'port': local_port,
+ 'probability': 30,
+ 'vrf_id': 0}]
+
+ self.vapi.nat44_forwarding_enable_disable(1)
+ self.vapi.nat44_add_del_lb_static_mapping(external_addr_n,
+ external_port,
+ IP_PROTOS.tcp,
+ out2in_only=1,
+ local_num=len(locals),
+ locals=locals)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # from client to service
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=12345, dport=external_port))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ server = None
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertIn(ip.dst, [server1.ip4, server2.ip4])
+ if ip.dst == server1.ip4:
+ server = server1
+ else:
+ server = server2
+ self.assertEqual(tcp.dport, local_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from service back to client
+ p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
+ IP(src=server.ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=local_port, dport=12345))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.nat_addr)
+ self.assertEqual(tcp.sport, external_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from client to server (no translation)
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=server1.ip4) /
+ TCP(sport=12346, dport=local_port))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ server = None
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.dst, server1.ip4)
+ self.assertEqual(tcp.dport, local_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from service back to client (no translation)
+ p = (Ether(src=server1.mac, dst=self.pg0.local_mac) /
+ IP(src=server1.ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=local_port, dport=12346))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, server1.ip4)
+ self.assertEqual(tcp.sport, local_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ def test_lb_affinity(self):
+ """ NAT44 local service load balancing affinity """
+ external_addr_n = socket.inet_pton(socket.AF_INET, self.nat_addr)
+ external_port = 80
+ local_port = 8080
+ server1 = self.pg0.remote_hosts[0]
+ server2 = self.pg0.remote_hosts[1]
+
+ locals = [{'addr': server1.ip4n,
+ 'port': local_port,
+ 'probability': 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(external_addr_n,
+ external_port,
+ IP_PROTOS.tcp,
+ affinity=10800,
+ local_num=len(locals),
+ locals=locals)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ 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(
+ socket.inet_pton(socket.AF_INET, backend), 0)
+ self.assertEqual(len(sessions), 1)
+ self.assertTrue(sessions[0].ext_host_valid)
+ self.vapi.nat44_del_session(
+ sessions[0].inside_ip_address,
+ sessions[0].inside_port,
+ sessions[0].protocol,
+ ext_host_address=sessions[0].ext_host_address,
+ ext_host_port=sessions[0].ext_host_port)
+
+ 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)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # in2out
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=self.tcp_port_in, dport=20))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg1.get_capture(1)
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
+ TCP(sport=1234, dport=1234))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg1.get_capture(1)
+ packet = p[0]
+ try:
+ self.assertEqual(packet[IP].src, self.nat_addr)
+ self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.assert_packet_checksums_valid(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # out2in
+ p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
+ TCP(sport=1234, dport=1234))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg0.get_capture(1)
+ packet = p[0]
+ try:
+ self.assertEqual(packet[IP].src, self.pg1.remote_ip4)
+ self.assertEqual(packet[IP].dst, self.pg0.remote_ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.assert_packet_checksums_valid(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_hairpinning_unknown_proto(self):
+ """ NAT44 translate packet with unknown protocol - hairpinning """
+ host = self.pg0.remote_hosts[0]
+ server = self.pg0.remote_hosts[1]
+ host_in_port = 1234
+ server_out_port = 8765
+ server_nat_ip = "10.0.0.11"
+
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # add static mapping for server
+ self.nat44_add_static_mapping(server.ip4, server_nat_ip)
+
+ # host to server
+ p = (Ether(src=host.mac, dst=self.pg0.local_mac) /
+ IP(src=host.ip4, dst=server_nat_ip) /
+ TCP(sport=host_in_port, dport=server_out_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg0.get_capture(1)
+
+ p = (Ether(dst=self.pg0.local_mac, src=host.mac) /
+ IP(src=host.ip4, dst=server_nat_ip) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
+ TCP(sport=1234, dport=1234))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg0.get_capture(1)
+ packet = p[0]
+ try:
+ self.assertEqual(packet[IP].src, self.nat_addr)
+ self.assertEqual(packet[IP].dst, server.ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.assert_packet_checksums_valid(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ # server to host
+ p = (Ether(dst=self.pg0.local_mac, src=server.mac) /
+ IP(src=server.ip4, dst=self.nat_addr) /
+ GRE() /
+ IP(src=self.pg2.remote_ip4, dst=self.pg2.remote_ip4) /
+ TCP(sport=1234, dport=1234))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg0.get_capture(1)
+ packet = p[0]
+ try:
+ self.assertEqual(packet[IP].src, server_nat_ip)
+ self.assertEqual(packet[IP].dst, host.ip4)
+ self.assertTrue(packet.haslayer(GRE))
+ self.assert_packet_checksums_valid(packet)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
+ def test_output_feature_and_service(self):
+ """ NAT44 interface output feature and services """
+ external_addr = '1.2.3.4'
+ external_port = 80
+ local_port = 8080
+
+ self.vapi.nat44_forwarding_enable_disable(1)
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_add_del_identity_mapping(ip=self.pg1.remote_ip4n)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, external_addr,
+ local_port, external_port,
+ proto=IP_PROTOS.tcp, out2in_only=1)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # from client to service
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=external_addr) /
+ TCP(sport=12345, dport=external_port))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.dst, self.pg0.remote_ip4)
+ self.assertEqual(tcp.dport, local_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from service back to client
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=local_port, dport=12345))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, external_addr)
+ self.assertEqual(tcp.sport, external_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from local network host to external network
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+
+ # from external network back to local network host
+ pkts = self.create_stream_out(self.pg1)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+
+ def test_output_feature_and_service2(self):
+ """ NAT44 interface output feature and service host direct access """
+ self.vapi.nat44_forwarding_enable_disable(1)
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # session initiaded from service host - translate
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+
+ pkts = self.create_stream_out(self.pg1)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+
+ # session initiaded from remote host - do not translate
+ self.tcp_port_in = 60303
+ self.udp_port_in = 60304
+ self.icmp_id_in = 60305
+ pkts = self.create_stream_out(self.pg1,
+ self.pg0.remote_ip4,
+ use_inside_ports=True)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip=self.pg0.remote_ip4,
+ same_port=True)
+
+ def test_output_feature_and_service3(self):
+ """ NAT44 interface output feature and DST NAT """
+ external_addr = '1.2.3.4'
+ external_port = 80
+ local_port = 8080
+
+ self.vapi.nat44_forwarding_enable_disable(1)
+ self.nat44_add_address(self.nat_addr)
+ self.nat44_add_static_mapping(self.pg1.remote_ip4, external_addr,
+ local_port, external_port,
+ proto=IP_PROTOS.tcp, out2in_only=1)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=external_addr) /
+ TCP(sport=12345, dport=external_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.pg0.remote_ip4)
+ self.assertEqual(tcp.sport, 12345)
+ self.assertEqual(ip.dst, self.pg1.remote_ip4)
+ self.assertEqual(tcp.dport, local_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
+ TCP(sport=local_port, dport=12345))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, external_addr)
+ self.assertEqual(tcp.sport, external_port)
+ self.assertEqual(ip.dst, self.pg0.remote_ip4)
+ self.assertEqual(tcp.dport, 12345)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ def 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(1)
+ self.nat44_add_address(twice_nat_addr, twice_nat=1)
+ self.nat44_add_static_mapping(self.pg6.remote_ip4, self.pg1.remote_ip4,
+ local_port, external_port,
+ proto=IP_PROTOS.tcp, out2in_only=1,
+ self_twice_nat=1, vrf_id=1)
+ self.vapi.nat44_interface_add_del_feature(self.pg6.sw_if_index,
+ is_inside=0)
+
+ 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:
- server = server2
- self.assertNotEqual(tcp.sport, eh_port_out)
+ 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)
+ if not lb:
+ self.nat44_add_static_mapping(pg0.remote_ip4, self.nat_addr,
+ port_in, port_out,
+ proto=IP_PROTOS.tcp,
+ twice_nat=int(not self_twice_nat),
+ self_twice_nat=int(self_twice_nat))
+ 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_n = socket.inet_pton(socket.AF_INET, self.nat_addr)
+ self.vapi.nat44_add_del_lb_static_mapping(out_addr_n,
+ port_out,
+ IP_PROTOS.tcp,
+ twice_nat=int(
+ not self_twice_nat),
+ self_twice_nat=int(
+ self_twice_nat),
+ local_num=len(locals),
+ locals=locals)
+ self.vapi.nat44_interface_add_del_feature(pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(pg1.sw_if_index,
+ is_inside=0)
+
+ 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].ext_host_valid)
+ self.assertTrue(sessions[0].is_twicenat)
+ self.vapi.nat44_del_session(
+ sessions[0].inside_ip_address,
+ sessions[0].inside_port,
+ sessions[0].protocol,
+ 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 """
+ self.vapi.nat44_add_interface_addr(self.pg3.sw_if_index, twice_nat=1)
+
+ # no address in NAT pool
+ adresses = self.vapi.nat44_address_dump()
+ self.assertEqual(0, len(adresses))
+
+ # configure interface address and check NAT address pool
+ self.pg3.config_ip4()
+ adresses = self.vapi.nat44_address_dump()
+ self.assertEqual(1, len(adresses))
+ self.assertEqual(adresses[0].ip_address[0:4], self.pg3.local_ip4n)
+ self.assertEqual(adresses[0].twice_nat, 1)
+
+ # remove interface address and check NAT address pool
+ self.pg3.unconfig_ip4()
+ adresses = self.vapi.nat44_address_dump()
+ self.assertEqual(0, len(adresses))
+
+ 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)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4,
+ self.nat_addr,
+ self.tcp_port_in,
+ self.tcp_port_out,
+ proto=IP_PROTOS.tcp,
+ twice_nat=1)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ 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)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4,
+ self.nat_addr,
+ self.tcp_port_in,
+ self.tcp_port_out,
+ proto=IP_PROTOS.tcp,
+ twice_nat=1)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ 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)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4,
+ self.nat_addr,
+ self.tcp_port_in,
+ self.tcp_port_out,
+ proto=IP_PROTOS.tcp,
+ twice_nat=1)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ 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(1)
+ self.nat44_add_address(self.nat_addr, twice_nat=1)
+ self.nat44_add_static_mapping(local_host.ip4, self.nat_addr,
+ local_port, external_port,
+ proto=IP_PROTOS.tcp, out2in_only=1,
+ twice_nat=1)
+ self.vapi.nat44_interface_add_del_feature(self.pg4.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg4.sw_if_index,
+ is_inside=0)
+
+ # from client to service
+ p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
+ IP(src=remote_host.ip4, dst=self.nat_addr) /
+ TCP(sport=12345, dport=external_port))
+ self.pg4.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg4.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.dst, local_host.ip4)
+ self.assertEqual(ip.src, self.nat_addr)
+ self.assertEqual(tcp.dport, local_port)
+ self.assertNotEqual(tcp.sport, 12345)
eh_port_in = tcp.sport
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from service back to client
+ p = (Ether(src=self.pg4.remote_mac, dst=self.pg4.local_mac) /
+ IP(src=local_host.ip4, dst=self.nat_addr) /
+ TCP(sport=local_port, dport=eh_port_in))
+ self.pg4.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg4.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.nat_addr)
+ self.assertEqual(ip.dst, remote_host.ip4)
+ self.assertEqual(tcp.sport, external_port)
+ self.assertEqual(tcp.dport, 12345)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ def test_static_with_port_out2(self):
+ """ 1:1 NAPT asymmetrical rule """
+
+ external_port = 80
+ local_port = 8080
+
+ self.vapi.nat44_forwarding_enable_disable(1)
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, self.nat_addr,
+ local_port, external_port,
+ proto=IP_PROTOS.tcp, out2in_only=1)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # from client to service
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=12345, dport=external_port))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.dst, self.pg0.remote_ip4)
+ self.assertEqual(tcp.dport, local_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # ICMP error
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ ICMP(type=11) / capture[0][IP])
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ self.assertEqual(p[IP].src, self.nat_addr)
+ inner = p[IPerror]
+ self.assertEqual(inner.dst, self.nat_addr)
+ self.assertEqual(inner[TCPerror].dport, external_port)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from service back to client
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=local_port, dport=12345))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.nat_addr)
+ self.assertEqual(tcp.sport, external_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # ICMP error
+ p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.nat_addr) /
+ ICMP(type=11) / capture[0][IP])
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ try:
+ self.assertEqual(p[IP].dst, self.pg0.remote_ip4)
+ inner = p[IPerror]
+ self.assertEqual(inner.src, self.pg0.remote_ip4)
+ self.assertEqual(inner[TCPerror].sport, local_port)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from client to server (no translation)
+ p = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.pg0.remote_ip4) /
+ TCP(sport=12346, dport=local_port))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.dst, self.pg0.remote_ip4)
+ self.assertEqual(tcp.dport, local_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # from service back to client (no translation)
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=local_port, dport=12346))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, self.pg0.remote_ip4)
+ self.assertEqual(tcp.sport, local_port)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ def test_output_feature(self):
+ """ NAT44 interface output feature (in2out postrouting) """
+ self.vapi.nat44_forwarding_enable_disable(1)
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index,
+ is_inside=0)
+
+ # 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(1)
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_output_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_feature(self.pg5.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg5.sw_if_index,
+ is_inside=0)
+ self.vapi.nat44_interface_add_del_feature(self.pg6.sw_if_index,
+ is_inside=0)
+ self.nat44_add_static_mapping(self.pg5.remote_ip4, external_addr,
+ local_port, external_port, vrf_id=1,
+ proto=IP_PROTOS.tcp, out2in_only=1)
+ 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, out2in_only=1)
+
+ # 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.check_tcp_checksum(p)
- self.check_ip_checksum(p)
+ self.assert_packet_checksums_valid(p)
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
- p = (Ether(src=server.mac, dst=self.pg0.local_mac) /
- IP(src=server.ip4, dst=twice_nat_addr) /
- TCP(sport=local_port, dport=eh_port_in))
- self.pg0.add_stream(p)
+ # 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)
ip = p[IP]
tcp = p[TCP]
self.assertEqual(ip.src, self.nat_addr)
- self.assertEqual(ip.dst, self.pg1.remote_ip4)
+ 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.assertEqual(tcp.dport, eh_port_out)
- self.check_tcp_checksum(p)
- self.check_ip_checksum(p)
+ self.assert_packet_checksums_valid(p)
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
- def test_twice_nat_interface_addr(self):
- """ Acquire twice NAT44 addresses from interface """
- self.vapi.nat44_add_interface_addr(self.pg7.sw_if_index, twice_nat=1)
+ # 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
- # no address in NAT pool
- adresses = self.vapi.nat44_address_dump()
- self.assertEqual(0, len(adresses))
+ # 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
- # configure interface address and check NAT address pool
- self.pg7.config_ip4()
- adresses = self.vapi.nat44_address_dump()
- self.assertEqual(1, len(adresses))
- self.assertEqual(adresses[0].ip_address[0:4], self.pg7.local_ip4n)
- self.assertEqual(adresses[0].twice_nat, 1)
+ # 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
- # remove interface address and check NAT address pool
- self.pg7.unconfig_ip4()
- adresses = self.vapi.nat44_address_dump()
- self.assertEqual(0, len(adresses))
+ # 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
- def test_ipfix_max_frags(self):
- """ IPFIX logging maximum fragments pending reassembly exceeded """
+ # 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)
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
is_inside=0)
- self.vapi.nat_set_reass(max_frag=0)
- self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n,
- src_address=self.pg3.local_ip4n,
+ self.vapi.nat_set_timeouts(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 = "10.10.%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=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_limit_per_user(self):
+ """ Maximum sessions per user limit """
+ self.nat44_add_address(self.nat_addr)
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index,
+ is_inside=0)
+ self.vapi.set_ipfix_exporter(collector_address=self.pg2.remote_ip4n,
+ src_address=self.pg2.local_ip4n,
path_mtu=512,
template_interval=10)
+
+ # 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(domain_id=self.ipfix_domain_id,
src_port=self.ipfix_src_port)
- data = "A" * 4 + "B" * 16 + "C" * 3
- self.tcp_port_in = random.randint(1025, 65535)
- pkts = self.create_stream_frag(self.pg0,
- self.pg1.remote_ip4,
- self.tcp_port_in,
- 20,
- data)
- self.pg0.add_stream(pkts[-1])
+ 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()
- frags = self.pg1.get_capture(0)
+ capture = self.pg1.assert_nothing_captured()
+
+ # verify IPFIX logging
self.vapi.cli("ipfix flush") # FIXME this should be an API call
- capture = self.pg3.get_capture(9)
+ sleep(1)
+ capture = self.pg2.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))
- self.verify_ipfix_max_fragments_ip4(data, 0,
- self.pg0.remote_ip4n)
+ self.verify_ipfix_max_entries_per_user(
+ data,
+ nat44_config.max_translations_per_user,
+ self.pg0.remote_ip4n)
def tearDown(self):
- super(TestNAT44, self).tearDown()
+ super(TestNAT44EndpointDependent, self).tearDown()
if not self.vpp_dead:
- self.logger.info(self.vapi.cli("show nat44 verbose"))
- self.logger.info(self.vapi.cli("show nat virtual-reassembly"))
- self.vapi.cli("nat addr-port-assignment-alg default")
+ self.logger.info(self.vapi.cli("show nat44 addresses"))
+ self.logger.info(self.vapi.cli("show nat44 interfaces"))
+ self.logger.info(self.vapi.cli("show nat44 static mappings"))
+ self.logger.info(self.vapi.cli("show nat44 interface address"))
+ self.logger.info(self.vapi.cli("show nat44 sessions detail"))
+ self.logger.info(self.vapi.cli("show nat44 hash tables detail"))
+ self.logger.info(self.vapi.cli("show nat timeouts"))
self.clear_nat44()
+ self.vapi.cli("clear logging")
class TestNAT44Out2InDPO(MethodHolder):
@classmethod
def setUpClass(cls):
super(TestNAT44Out2InDPO, cls).setUpClass()
+ cls.vapi.cli("set log class nat level debug")
try:
cls.tcp_port_in = 6303
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()
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
@classmethod
def setUpClass(cls):
super(TestDeterministicNAT, cls).setUpClass()
+ cls.vapi.cli("set log class nat level debug")
try:
cls.tcp_port_in = 6303
return pkts
- def verify_capture_out(self, capture, nat_ip=None, packet_num=3):
+ 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: Sorce port number is not translated (Default False)
- :param packet_num: Expected number of packets (Default 3)
"""
if nat_ip is None:
nat_ip = self.nat_addr
- self.assertEqual(packet_num, len(capture))
for packet in capture:
try:
self.assertEqual(packet[IP].src, nat_ip)
"(outside network):", packet))
raise
- 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_max_entries_per_user(self, data):
- """
- Verify IPFIX maximum entries per user exceeded event
-
- :param data: Decoded IPFIX data records
- """
- self.assertEqual(1, len(data))
- record = data[0]
- # natEvent
- self.assertEqual(ord(record[230]), 13)
- # natQuotaExceededEvent
- self.assertEqual('\x03\x00\x00\x00', record[466])
- # maxEntriesPerUser
- self.assertEqual('\xe8\x03\x00\x00', record[473])
- # sourceIPv4Address
- self.assertEqual(self.pg0.remote_ip4n, record[8])
-
def test_deterministic_mode(self):
""" NAT plugin run deterministic mode """
in_addr = '172.16.255.0'
def test_set_timeouts(self):
""" Set deterministic NAT timeouts """
- timeouts_before = self.vapi.nat_det_get_timeouts()
+ timeouts_before = self.vapi.nat_get_timeouts()
- self.vapi.nat_det_set_timeouts(timeouts_before.udp + 10,
- timeouts_before.tcp_established + 10,
- timeouts_before.tcp_transitory + 10,
- timeouts_before.icmp + 10)
+ self.vapi.nat_set_timeouts(timeouts_before.udp + 10,
+ timeouts_before.tcp_established + 10,
+ timeouts_before.tcp_transitory + 10,
+ timeouts_before.icmp + 10)
- timeouts_after = self.vapi.nat_det_get_timeouts()
+ timeouts_after = self.vapi.nat_get_timeouts()
self.assertNotEqual(timeouts_before.udp, timeouts_after.udp)
self.assertNotEqual(timeouts_before.icmp, timeouts_after.icmp)
is_inside=0)
self.initiate_tcp_session(self.pg0, self.pg1)
- self.vapi.nat_det_set_timeouts(5, 5, 5, 5)
+ self.vapi.nat_set_timeouts(5, 5, 5, 5)
pkts = self.create_stream_in(self.pg0, self.pg1)
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
for p in capture:
if p.haslayer(Data):
data = ipfix.decode_data_set(p.getlayer(Set))
- self.verify_ipfix_max_entries_per_user(data)
+ 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=0)
- self.vapi.nat_det_set_timeouts()
+ self.vapi.nat_set_timeouts()
deterministic_mappings = self.vapi.nat_det_map_dump()
for dsm in deterministic_mappings:
self.vapi.nat_det_add_del_map(dsm.in_addr,
def tearDown(self):
super(TestDeterministicNAT, self).tearDown()
if not self.vpp_dead:
- self.logger.info(self.vapi.cli("show nat44 detail"))
+ 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"))
self.clear_nat_det()
cls.ipfix_src_port = 4739
cls.ipfix_domain_id = 1
- cls.create_pg_interfaces(range(5))
+ 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.pg3.config_ip6()
cls.pg3.configure_ipv6_neighbors()
+ cls.pg5.admin_up()
+ cls.pg5.config_ip6()
+
except Exception:
super(TestNAT64, cls).tearDownClass()
raise
+ def test_nat64_inside_interface_handles_neighbor_advertisement(self):
+ """ NAT64 inside interface handles Neighbor Advertisement """
+
+ self.vapi.nat64_add_del_interface(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.assertTrue(packet.haslayer(ICMPv6ND_NS))
+ 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.assertTrue(packet.haslayer(ICMPv6EchoReply))
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+
def test_pool(self):
""" Add/delete address to NAT64 pool """
nat_addr = socket.inet_pton(socket.AF_INET, '1.2.3.4')
def test_set_timeouts(self):
""" Set NAT64 timeouts """
# verify default values
- timeouts = self.vapi.nat64_get_timeouts()
+ timeouts = self.vapi.nat_get_timeouts()
self.assertEqual(timeouts.udp, 300)
self.assertEqual(timeouts.icmp, 60)
- self.assertEqual(timeouts.tcp_trans, 240)
- self.assertEqual(timeouts.tcp_est, 7440)
- self.assertEqual(timeouts.tcp_incoming_syn, 6)
+ self.assertEqual(timeouts.tcp_transitory, 240)
+ self.assertEqual(timeouts.tcp_established, 7440)
# set and verify custom values
- self.vapi.nat64_set_timeouts(udp=200, icmp=30, tcp_trans=250,
- tcp_est=7450, tcp_incoming_syn=10)
- timeouts = self.vapi.nat64_get_timeouts()
+ self.vapi.nat_set_timeouts(udp=200, icmp=30, tcp_transitory=250,
+ tcp_established=7450)
+ timeouts = self.vapi.nat_get_timeouts()
self.assertEqual(timeouts.udp, 200)
self.assertEqual(timeouts.icmp, 30)
- self.assertEqual(timeouts.tcp_trans, 250)
- self.assertEqual(timeouts.tcp_est, 7450)
- self.assertEqual(timeouts.tcp_incoming_syn, 10)
+ self.assertEqual(timeouts.tcp_transitory, 250)
+ self.assertEqual(timeouts.tcp_established, 7450)
def test_dynamic(self):
""" NAT64 dynamic translation test """
self.nat_addr_n)
self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
self.vapi.nat64_add_del_interface(self.pg1.sw_if_index, is_inside=0)
- self.vapi.nat64_set_timeouts(icmp=5)
+ self.vapi.nat_set_timeouts(icmp=5, tcp_transitory=5, tcp_established=5)
pkts = self.create_stream_in_ip6(self.pg0, self.pg1)
self.pg0.add_stream(pkts)
sleep(15)
- # ICMP session after timeout
+ # ICMP and TCP session after timeout
ses_num_after_timeout = self.nat64_get_ses_num()
- self.assertNotEqual(ses_num_before_timeout, ses_num_after_timeout)
+ self.assertEqual(ses_num_before_timeout - ses_num_after_timeout, 2)
def test_icmp_error(self):
""" NAT64 ICMP Error message translation """
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(self.nat_addr_n,
self.nat_addr_n)
self.vapi.nat64_add_del_interface(self.pg0.sw_if_index)
inner = packet[IPerror]
self.assertEqual(inner.src, self.pg1.remote_ip4)
self.assertEqual(inner.dst, self.nat_addr)
- self.check_icmp_checksum(packet)
+ self.assert_packet_checksums_valid(packet)
if inner.haslayer(TCPerror):
self.assertEqual(inner[TCPerror].dport, self.tcp_port_out)
elif inner.haslayer(UDPerror):
inner = icmp[IPerror6]
self.assertEqual(inner.src, self.pg0.remote_ip6)
self.assertEqual(inner.dst, ip.src)
- self.check_icmpv6_checksum(packet)
+ self.assert_icmpv6_checksum_valid(packet)
if inner.haslayer(TCPerror):
self.assertEqual(inner[TCPerror].sport, self.tcp_port_in)
elif inner.haslayer(UDPerror):
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)
- self.check_tcp_checksum(packet)
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)
- self.check_udp_checksum(packet)
client_udp_out_port = packet[UDP].sport
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
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)
- self.check_tcp_checksum(packet)
else:
self.assertEqual(packet[UDP].sport, server_udp_out_port)
self.assertEqual(packet[UDP].dport, client_udp_in_port)
- self.check_udp_checksum(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
inner = icmp[IPerror6]
self.assertEqual(inner.src, server.ip6)
self.assertEqual(inner.dst, nat_addr_ip6)
- self.check_icmpv6_checksum(packet)
+ self.assert_packet_checksums_valid(packet)
if inner.haslayer(TCPerror):
self.assertEqual(inner[TCPerror].sport, server_tcp_in_port)
self.assertEqual(inner[TCPerror].dport,
self.assertEqual(packet[IP].src, self.nat_addr)
self.assertEqual(packet[IP].dst, self.pg1.remote_ip4)
self.assertTrue(packet.haslayer(GRE))
- self.check_ip_checksum(packet)
+ self.assert_packet_checksums_valid(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
self.assertNotEqual(tcp.sport, 12345)
external_port = tcp.sport
self.assertEqual(tcp.dport, 80)
- self.check_tcp_checksum(p)
- self.check_ip_checksum(p)
+ self.assert_packet_checksums_valid(p)
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
self.assertEqual(ip.dst, self.pg3.remote_ip6)
self.assertEqual(tcp.sport, 80)
self.assertEqual(tcp.dport, 12345)
- self.check_tcp_checksum(p)
+ self.assert_packet_checksums_valid(p)
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
def test_reass_hairpinning(self):
""" NAT64 fragments hairpinning """
data = 'a' * 200
- client = self.pg0.remote_hosts[0]
server = self.pg0.remote_hosts[1]
server_in_port = random.randint(1025, 65535)
server_out_port = random.randint(1025, 65535)
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- self.pg1.get_capture(0)
+ self.pg1.assert_nothing_captured()
+ sleep(1)
self.vapi.cli("ipfix flush") # FIXME this should be an API call
capture = self.pg3.get_capture(9)
ipfix = IPFIXDecoder()
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- self.pg1.get_capture(0)
+ self.pg1.assert_nothing_captured()
+ sleep(1)
self.vapi.cli("ipfix flush") # FIXME this should be an API call
capture = self.pg3.get_capture(1)
# verify events in data set
self.pg0.add_stream(pkts[-1])
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
- self.pg1.get_capture(0)
+ self.pg1.assert_nothing_captured()
+ sleep(1)
self.vapi.cli("ipfix flush") # FIXME this should be an API call
capture = self.pg3.get_capture(9)
ipfix = IPFIXDecoder()
self.ipfix_src_port = 4739
self.ipfix_domain_id = 1
- self.vapi.nat64_set_timeouts()
+ self.vapi.nat_set_timeouts()
interfaces = self.vapi.nat64_interface_dump()
for intf in interfaces:
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(self.nat_addr_n,
self.nat_addr_n)
aftr_ip4 = '192.0.0.1'
self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
self.assertNotEqual(capture[UDP].sport, 20000)
self.assertEqual(capture[UDP].dport, 10000)
- self.check_ip_checksum(capture)
+ self.assert_packet_checksums_valid(capture)
out_port = capture[UDP].sport
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
self.assertEqual(capture[IP].dst, '192.168.1.1')
self.assertEqual(capture[UDP].sport, 10000)
self.assertEqual(capture[UDP].dport, 20000)
- self.check_ip_checksum(capture)
+ self.assert_packet_checksums_valid(capture)
# TCP
p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
self.assertNotEqual(capture[TCP].sport, 20001)
self.assertEqual(capture[TCP].dport, 10001)
- self.check_ip_checksum(capture)
- self.check_tcp_checksum(capture)
+ self.assert_packet_checksums_valid(capture)
out_port = capture[TCP].sport
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
self.assertEqual(capture[IP].dst, '192.168.1.1')
self.assertEqual(capture[TCP].sport, 10001)
self.assertEqual(capture[TCP].dport, 20001)
- self.check_ip_checksum(capture)
- self.check_tcp_checksum(capture)
+ self.assert_packet_checksums_valid(capture)
# ICMP
p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
self.assertEqual(capture[IP].src, self.nat_addr)
self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
self.assertNotEqual(capture[ICMP].id, 4000)
- self.check_ip_checksum(capture)
- self.check_icmp_checksum(capture)
+ self.assert_packet_checksums_valid(capture)
out_id = capture[ICMP].id
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
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.check_ip_checksum(capture)
- self.check_icmp_checksum(capture)
+ 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) /
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg1.get_capture(1)
- self.assertEqual(1, len(capture))
capture = capture[0]
self.assertEqual(capture[IPv6].src, aftr_ip6)
self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[1].ip6)
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
+
+ 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_ip4_n = socket.inet_pton(socket.AF_INET, b4_ip4)
+ b4_ip6 = '2001:db8:62aa::375e:f4c1:1'
+ b4_ip6_n = socket.inet_pton(socket.AF_INET6, b4_ip6)
+ self.vapi.dslite_set_b4_addr(b4_ip6_n, b4_ip4_n)
+
+ aftr_ip4 = '192.0.0.1'
+ aftr_ip4_n = socket.inet_pton(socket.AF_INET, aftr_ip4)
+ 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(aftr_ip6_n, aftr_ip4_n)
+
+ self.vapi.ip_add_del_route(dst_address=aftr_ip6_n,
+ dst_address_length=128,
+ next_hop_address=self.pg1.remote_ip6n,
+ next_hop_sw_if_index=self.pg1.sw_if_index,
+ is_ipv6=1)
+
+ # 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()
+ if not self.vpp_dead:
+ 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.nat_addr_n = socket.inet_pton(socket.AF_INET6, cls.nat_addr)
+
+ 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
+
+ def test_static(self):
+ """ 1:1 NAT66 test """
+ self.vapi.nat66_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat66_add_del_interface(self.pg1.sw_if_index, is_inside=0)
+ self.vapi.nat66_add_del_static_mapping(self.pg0.remote_ip6n,
+ self.nat_addr_n)
+
+ # 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 """
+ self.vapi.nat66_add_del_interface(self.pg0.sw_if_index)
+ self.vapi.nat66_add_del_interface(self.pg1.sw_if_index)
+ self.vapi.nat66_add_del_static_mapping(self.pg0.remote_ip6n,
+ self.nat_addr_n)
+
+ # 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(intf.sw_if_index,
+ intf.is_inside,
+ is_add=0)
+
+ static_mappings = self.vapi.nat66_static_mapping_dump()
+ for sm in static_mappings:
+ self.vapi.nat66_add_del_static_mapping(sm.local_ip_address,
+ sm.external_ip_address,
+ sm.vrf_id,
+ is_add=0)
+
+ def tearDown(self):
+ super(TestNAT66, self).tearDown()
+ if not self.vpp_dead:
+ self.logger.info(self.vapi.cli("show nat66 interfaces"))
+ self.logger.info(self.vapi.cli("show nat66 static mappings"))
+ self.clear_nat66()
+
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)