import socket
import unittest
import struct
+import StringIO
+import random
from framework import VppTestCase, VppTestRunner, running_extended_tests
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 ICMPv6DestUnreach, IPerror6
+from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6, IPv6ExtHdrFragment
from scapy.layers.l2 import Ether, ARP, GRE
from scapy.data import IP_PROTOS
-from scapy.packet import bind_layers
+from scapy.packet import bind_layers, Raw
+from scapy.all import fragment6
from util import ppp
from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder
from time import sleep
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)
+ 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,
+ 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=[])
- 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)
+ 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)
- 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)
+ 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)
- if pkt.haslayer(ICMPerror):
- del new['ICMPerror'].chksum
- new = new.__class__(str(new))
- self.assertEqual(new['ICMPerror'].chksum, pkt['ICMPerror'].chksum)
+ self.vapi.nat_set_reass()
+ self.vapi.nat_set_reass(is_ip6=1)
- def check_icmp_checksum(self, pkt):
+ 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)
+ 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 check_icmpv6_checksum(self, pkt):
+ 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, ttl=64):
+ def create_stream_in(self, in_if, out_if, dst_ip=None, ttl=64):
"""
Create packet stream for inside network
:param in_if: Inside interface
:param out_if: Outside interface
+ :param dst_ip: Destination address
:param ttl: TTL of generated packets
"""
+ if dst_ip is None:
+ dst_ip = out_if.remote_ip4
+
pkts = []
# TCP
p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
- IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) /
+ IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
TCP(sport=self.tcp_port_in, dport=20))
pkts.append(p)
# UDP
p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
- IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) /
+ IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
UDP(sport=self.udp_port_in, dport=20))
pkts.append(p)
# ICMP
p = (Ether(dst=in_if.local_mac, src=in_if.remote_mac) /
- IP(src=in_if.remote_ip4, dst=out_if.remote_ip4, ttl=ttl) /
+ IP(src=in_if.remote_ip4, dst=dst_ip, ttl=ttl) /
ICMP(id=self.icmp_id_in, type='echo-request'))
pkts.append(p)
pref_n[15] = ip4_n[3]
return socket.inet_ntop(socket.AF_INET6, ''.join(pref_n))
+ def extract_ip4(self, ip6, plen):
+ """
+ Extract IPv4 address embedded in IPv6 addresses
+
+ :param ip6: IPv6 address
+ :param plen: IPv6 prefix length
+ :returns: extracted IPv4 address
+ """
+ ip6_n = list(socket.inet_pton(socket.AF_INET6, ip6))
+ ip4_n = [None] * 4
+ if plen == 32:
+ ip4_n[0] = ip6_n[4]
+ ip4_n[1] = ip6_n[5]
+ ip4_n[2] = ip6_n[6]
+ ip4_n[3] = ip6_n[7]
+ elif plen == 40:
+ ip4_n[0] = ip6_n[5]
+ ip4_n[1] = ip6_n[6]
+ ip4_n[2] = ip6_n[7]
+ ip4_n[3] = ip6_n[9]
+ elif plen == 48:
+ ip4_n[0] = ip6_n[6]
+ ip4_n[1] = ip6_n[7]
+ ip4_n[2] = ip6_n[9]
+ ip4_n[3] = ip6_n[10]
+ elif plen == 56:
+ ip4_n[0] = ip6_n[7]
+ ip4_n[1] = ip6_n[9]
+ ip4_n[2] = ip6_n[10]
+ ip4_n[3] = ip6_n[11]
+ elif plen == 64:
+ ip4_n[0] = ip6_n[9]
+ ip4_n[1] = ip6_n[10]
+ ip4_n[2] = ip6_n[11]
+ ip4_n[3] = ip6_n[12]
+ elif plen == 96:
+ ip4_n[0] = ip6_n[12]
+ ip4_n[1] = ip6_n[13]
+ ip4_n[2] = ip6_n[14]
+ ip4_n[3] = ip6_n[15]
+ return socket.inet_ntop(socket.AF_INET, ''.join(ip4_n))
+
def create_stream_in_ip6(self, in_if, out_if, hlim=64, pref=None, plen=0):
"""
Create IPv6 packet stream for inside network
return pkts
- def create_stream_out(self, out_if, dst_ip=None, ttl=64):
+ def create_stream_out(self, out_if, dst_ip=None, ttl=64,
+ use_inside_ports=False):
"""
Create packet stream for outside network
:param out_if: Outside interface
:param dst_ip: Destination IP address (Default use global NAT address)
:param ttl: TTL of generated packets
+ :param use_inside_ports: Use inside NAT ports as destination ports
+ instead of outside ports
"""
if dst_ip is None:
dst_ip = self.nat_addr
+ if not use_inside_ports:
+ tcp_port = self.tcp_port_out
+ udp_port = self.udp_port_out
+ icmp_id = self.icmp_id_out
+ else:
+ tcp_port = self.tcp_port_in
+ udp_port = self.udp_port_in
+ icmp_id = self.icmp_id_in
pkts = []
# TCP
p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
- TCP(dport=self.tcp_port_out, sport=20))
+ TCP(dport=tcp_port, sport=20))
pkts.append(p)
# UDP
p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
- UDP(dport=self.udp_port_out, sport=20))
+ UDP(dport=udp_port, sport=20))
pkts.append(p)
# ICMP
p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
- ICMP(id=self.icmp_id_out, type='echo-reply'))
+ ICMP(id=icmp_id, type='echo-reply'))
+ pkts.append(p)
+
+ return pkts
+
+ def create_stream_out_ip6(self, out_if, src_ip, dst_ip, hl=64):
+ """
+ Create packet stream for outside network
+
+ :param out_if: Outside interface
+ :param dst_ip: Destination IP address (Default use global NAT address)
+ :param hl: HL of generated packets
+ """
+ pkts = []
+ # TCP
+ p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
+ IPv6(src=src_ip, dst=dst_ip, hlim=hl) /
+ TCP(dport=self.tcp_port_out, sport=20))
+ pkts.append(p)
+
+ # UDP
+ p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
+ IPv6(src=src_ip, dst=dst_ip, hlim=hl) /
+ UDP(dport=self.udp_port_out, sport=20))
+ pkts.append(p)
+
+ # ICMP
+ p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
+ IPv6(src=src_ip, dst=dst_ip, hlim=hl) /
+ ICMPv6EchoReply(id=self.icmp_id_out))
pkts.append(p)
return pkts
def verify_capture_out(self, capture, nat_ip=None, same_port=False,
- packet_num=3, dst_ip=None):
+ packet_num=3, dst_ip=None, is_ip6=False):
"""
Verify captured packets on outside network
: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)
"""
+ if is_ip6:
+ IP46 = IPv6
+ ICMP46 = ICMPv6EchoRequest
+ else:
+ IP46 = IP
+ ICMP46 = ICMP
if nat_ip is None:
nat_ip = self.nat_addr
self.assertEqual(packet_num, len(capture))
for packet in capture:
try:
- self.check_ip_checksum(packet)
- self.assertEqual(packet[IP].src, nat_ip)
+ if not is_ip6:
+ self.assert_packet_checksums_valid(packet)
+ self.assertEqual(packet[IP46].src, nat_ip)
if dst_ip is not None:
- self.assertEqual(packet[IP].dst, dst_ip)
+ self.assertEqual(packet[IP46].dst, dst_ip)
if packet.haslayer(TCP):
if same_port:
self.assertEqual(packet[TCP].sport, self.tcp_port_in)
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)
self.udp_port_out = packet[UDP].sport
else:
if same_port:
- self.assertEqual(packet[ICMP].id, self.icmp_id_in)
+ self.assertEqual(packet[ICMP46].id, self.icmp_id_in)
else:
- self.assertNotEqual(packet[ICMP].id, self.icmp_id_in)
- self.icmp_id_out = packet[ICMP].id
- self.check_icmp_checksum(packet)
+ self.assertNotEqual(packet[ICMP46].id, self.icmp_id_in)
+ self.icmp_id_out = packet[ICMP46].id
+ self.assert_packet_checksums_valid(packet)
except:
self.logger.error(ppp("Unexpected or invalid packet "
"(outside network):", packet))
raise
+ def verify_capture_out_ip6(self, capture, nat_ip, same_port=False,
+ packet_num=3, 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)
+
def verify_capture_in(self, capture, in_if, packet_num=3):
"""
Verify captured packets on inside network
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))
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))
"(inside network):", packet))
raise
+ def create_stream_frag(self, src_if, dst, sport, dport, data):
+ """
+ Create fragmented packet stream
+
+ :param src_if: Source interface
+ :param dst: Destination IPv4 address
+ :param sport: Source TCP port
+ :param dport: Destination TCP port
+ :param data: Payload data
+ :returns: Fragmets
+ """
+ id = random.randint(0, 65535)
+ p = (IP(src=src_if.remote_ip4, dst=dst) /
+ TCP(sport=sport, dport=dport) /
+ Raw(data))
+ p = p.__class__(str(p))
+ chksum = p['TCP'].chksum
+ pkts = []
+ p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
+ IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=0, id=id) /
+ TCP(sport=sport, dport=dport, chksum=chksum) /
+ Raw(data[0:4]))
+ pkts.append(p)
+ p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
+ IP(src=src_if.remote_ip4, dst=dst, flags="MF", frag=3, id=id,
+ proto=IP_PROTOS.tcp) /
+ Raw(data[4:20]))
+ pkts.append(p)
+ p = (Ether(src=src_if.remote_mac, dst=src_if.local_mac) /
+ IP(src=src_if.remote_ip4, dst=dst, frag=5, proto=IP_PROTOS.tcp,
+ id=id) /
+ Raw(data[20:]))
+ pkts.append(p)
+ return pkts
+
+ def create_stream_frag_ip6(self, src_if, dst, sport, dport, data,
+ pref=None, plen=0, frag_size=128):
+ """
+ Create fragmented packet stream
+
+ :param src_if: Source interface
+ :param dst: Destination IPv4 address
+ :param sport: Source TCP port
+ :param dport: Destination TCP port
+ :param data: Payload data
+ :param pref: NAT64 prefix
+ :param plen: NAT64 prefix length
+ :param fragsize: size of fragments
+ :returns: Fragmets
+ """
+ if pref is None:
+ dst_ip6 = ''.join(['64:ff9b::', dst])
+ else:
+ dst_ip6 = self.compose_ip6(dst, pref, plen)
+
+ p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
+ IPv6(src=src_if.remote_ip6, dst=dst_ip6) /
+ IPv6ExtHdrFragment(id=random.randint(0, 65535)) /
+ TCP(sport=sport, dport=dport) /
+ Raw(data))
+
+ return fragment6(p, frag_size)
+
+ def reass_frags_and_verify(self, frags, src, dst):
+ """
+ Reassemble and verify fragmented packet
+
+ :param frags: Captured fragments
+ :param src: Source IPv4 address to verify
+ :param dst: Destination IPv4 address to verify
+
+ :returns: Reassembled IPv4 packet
+ """
+ buffer = StringIO.StringIO()
+ for p in frags:
+ self.assertEqual(p[IP].src, src)
+ self.assertEqual(p[IP].dst, dst)
+ self.assert_ip_checksum_valid(p)
+ buffer.seek(p[IP].frag * 8)
+ buffer.write(p[IP].payload)
+ ip = frags[0].getlayer(IP)
+ ip = IP(src=frags[0][IP].src, dst=frags[0][IP].dst,
+ proto=frags[0][IP].proto)
+ if ip.proto == IP_PROTOS.tcp:
+ p = (ip / TCP(buffer.getvalue()))
+ self.assert_tcp_checksum_valid(p)
+ elif ip.proto == IP_PROTOS.udp:
+ p = (ip / UDP(buffer.getvalue()))
+ return p
+
+ def reass_frags_and_verify_ip6(self, frags, src, dst):
+ """
+ Reassemble and verify fragmented packet
+
+ :param frags: Captured fragments
+ :param src: Source IPv6 address to verify
+ :param dst: Destination IPv6 address to verify
+
+ :returns: Reassembled IPv6 packet
+ """
+ buffer = StringIO.StringIO()
+ for p in frags:
+ self.assertEqual(p[IPv6].src, src)
+ self.assertEqual(p[IPv6].dst, dst)
+ buffer.seek(p[IPv6ExtHdrFragment].offset * 8)
+ buffer.write(p[IPv6ExtHdrFragment].payload)
+ ip = IPv6(src=frags[0][IPv6].src, dst=frags[0][IPv6].dst,
+ nh=frags[0][IPv6ExtHdrFragment].nh)
+ if ip.nh == IP_PROTOS.tcp:
+ p = (ip / TCP(buffer.getvalue()))
+ elif ip.nh == IP_PROTOS.udp:
+ p = (ip / UDP(buffer.getvalue()))
+ self.assert_packet_checksums_valid(p)
+ return p
+
+ def initiate_tcp_session(self, in_if, out_if):
+ """
+ Initiates TCP session
+
+ :param in_if: Inside interface
+ :param out_if: Outside interface
+ """
+ try:
+ # SYN packet in->out
+ p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
+ IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
+ flags="S"))
+ in_if.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = out_if.get_capture(1)
+ p = capture[0]
+ self.tcp_port_out = p[TCP].sport
+
+ # SYN + ACK packet out->in
+ p = (Ether(src=out_if.remote_mac, dst=out_if.local_mac) /
+ IP(src=out_if.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=self.tcp_external_port, dport=self.tcp_port_out,
+ flags="SA"))
+ out_if.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ in_if.get_capture(1)
+
+ # ACK packet in->out
+ p = (Ether(src=in_if.remote_mac, dst=in_if.local_mac) /
+ IP(src=in_if.remote_ip4, dst=out_if.remote_ip4) /
+ TCP(sport=self.tcp_port_in, dport=self.tcp_external_port,
+ flags="A"))
+ in_if.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ out_if.get_capture(1)
+
+ except:
+ self.logger.error("TCP 3 way handshake failed")
+ raise
+
def verify_ipfix_nat44_ses(self, data):
"""
Verify IPFIX NAT44 session create/delete event
# natPoolID
self.assertEqual(struct.pack("!I", 0), record[283])
+ def verify_ipfix_max_sessions(self, data, limit):
+ """
+ Verify IPFIX maximum session entries exceeded event
-class TestNAT44(MethodHolder):
- """ NAT44 Test Cases """
+ :param data: Decoded IPFIX data records
+ :param limit: Number of maximum session entries that can be created.
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ self.assertEqual(ord(record[230]), 13)
+ # natQuotaExceededEvent
+ self.assertEqual(struct.pack("I", 1), record[466])
+ # maxSessionEntries
+ self.assertEqual(struct.pack("I", limit), record[471])
- @classmethod
- def setUpClass(cls):
- super(TestNAT44, cls).setUpClass()
+ def verify_ipfix_max_bibs(self, data, limit):
+ """
+ Verify IPFIX maximum BIB entries exceeded event
- try:
- cls.tcp_port_in = 6303
- cls.tcp_port_out = 6303
- cls.udp_port_in = 6304
- cls.udp_port_out = 6304
- cls.icmp_id_in = 6305
- cls.icmp_id_out = 6305
- cls.nat_addr = '10.0.0.3'
- cls.ipfix_src_port = 4739
- cls.ipfix_domain_id = 1
+ :param data: Decoded IPFIX data records
+ :param limit: Number of maximum BIB entries that can be created.
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ self.assertEqual(ord(record[230]), 13)
+ # natQuotaExceededEvent
+ self.assertEqual(struct.pack("I", 2), record[466])
+ # maxBIBEntries
+ self.assertEqual(struct.pack("I", limit), record[472])
- cls.create_pg_interfaces(range(10))
+ def verify_ipfix_max_fragments_ip6(self, data, limit, src_addr):
+ """
+ Verify IPFIX maximum IPv6 fragments pending reassembly exceeded event
+
+ :param data: Decoded IPFIX data records
+ :param limit: Number of maximum fragments pending reassembly
+ :param src_addr: IPv6 source address
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ self.assertEqual(ord(record[230]), 13)
+ # natQuotaExceededEvent
+ self.assertEqual(struct.pack("I", 5), record[466])
+ # maxFragmentsPendingReassembly
+ self.assertEqual(struct.pack("I", limit), record[475])
+ # sourceIPv6Address
+ self.assertEqual(src_addr, record[27])
+
+ def verify_ipfix_max_fragments_ip4(self, data, limit, src_addr):
+ """
+ Verify IPFIX maximum IPv4 fragments pending reassembly exceeded event
+
+ :param data: Decoded IPFIX data records
+ :param limit: Number of maximum fragments pending reassembly
+ :param src_addr: IPv4 source address
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ self.assertEqual(ord(record[230]), 13)
+ # natQuotaExceededEvent
+ self.assertEqual(struct.pack("I", 5), record[466])
+ # maxFragmentsPendingReassembly
+ self.assertEqual(struct.pack("I", limit), record[475])
+ # sourceIPv4Address
+ self.assertEqual(src_addr, record[8])
+
+ def verify_ipfix_bib(self, data, is_create, src_addr):
+ """
+ Verify IPFIX NAT64 BIB create and delete events
+
+ :param data: Decoded IPFIX data records
+ :param is_create: Create event if nonzero value otherwise delete event
+ :param src_addr: IPv6 source address
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ if is_create:
+ self.assertEqual(ord(record[230]), 10)
+ else:
+ self.assertEqual(ord(record[230]), 11)
+ # sourceIPv6Address
+ self.assertEqual(src_addr, record[27])
+ # postNATSourceIPv4Address
+ self.assertEqual(self.nat_addr_n, record[225])
+ # protocolIdentifier
+ self.assertEqual(IP_PROTOS.tcp, ord(record[4]))
+ # ingressVRFID
+ self.assertEqual(struct.pack("!I", 0), record[234])
+ # sourceTransportPort
+ self.assertEqual(struct.pack("!H", self.tcp_port_in), record[7])
+ # postNAPTSourceTransportPort
+ self.assertEqual(struct.pack("!H", self.tcp_port_out), record[227])
+
+ def verify_ipfix_nat64_ses(self, data, is_create, src_addr, dst_addr,
+ dst_port):
+ """
+ Verify IPFIX NAT64 session create and delete events
+
+ :param data: Decoded IPFIX data records
+ :param is_create: Create event if nonzero value otherwise delete event
+ :param src_addr: IPv6 source address
+ :param dst_addr: IPv4 destination address
+ :param dst_port: destination TCP port
+ """
+ self.assertEqual(1, len(data))
+ record = data[0]
+ # natEvent
+ if is_create:
+ self.assertEqual(ord(record[230]), 6)
+ else:
+ self.assertEqual(ord(record[230]), 7)
+ # sourceIPv6Address
+ self.assertEqual(src_addr, record[27])
+ # destinationIPv6Address
+ self.assertEqual(socket.inet_pton(socket.AF_INET6,
+ self.compose_ip6(dst_addr,
+ '64:ff9b::',
+ 96)),
+ record[28])
+ # postNATSourceIPv4Address
+ self.assertEqual(self.nat_addr_n, record[225])
+ # postNATDestinationIPv4Address
+ self.assertEqual(socket.inet_pton(socket.AF_INET, dst_addr),
+ record[226])
+ # protocolIdentifier
+ self.assertEqual(IP_PROTOS.tcp, ord(record[4]))
+ # ingressVRFID
+ self.assertEqual(struct.pack("!I", 0), record[234])
+ # sourceTransportPort
+ self.assertEqual(struct.pack("!H", self.tcp_port_in), record[7])
+ # postNAPTSourceTransportPort
+ self.assertEqual(struct.pack("!H", self.tcp_port_out), record[227])
+ # destinationTransportPort
+ self.assertEqual(struct.pack("!H", dst_port), record[11])
+ # postNAPTDestinationTransportPort
+ self.assertEqual(struct.pack("!H", dst_port), record[228])
+
+
+class TestNAT44(MethodHolder):
+ """ NAT44 Test Cases """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestNAT44, cls).setUpClass()
+ cls.vapi.cli("set log class nat level debug")
+
+ try:
+ cls.tcp_port_in = 6303
+ cls.tcp_port_out = 6303
+ cls.udp_port_in = 6304
+ cls.udp_port_out = 6304
+ cls.icmp_id_in = 6305
+ cls.icmp_id_out = 6305
+ cls.nat_addr = '10.0.0.3'
+ cls.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])
for i in cls.interfaces:
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)
-
- if self.pg7.has_ip4_config:
- self.pg7.unconfig_ip4()
-
- interfaces = self.vapi.nat44_interface_addr_dump()
- for intf in interfaces:
- self.vapi.nat44_add_interface_addr(intf.sw_if_index, is_add=0)
-
- 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
-
- 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)
-
- 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,
- 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,
- lb_sm.vrf_id,
- is_add=0,
- local_num=0,
- locals=[])
-
- adresses = self.vapi.nat44_address_dump()
- for addr in adresses:
- self.vapi.nat44_add_del_address_range(addr.ip_address,
- addr.ip_address,
- is_add=0)
-
- 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):
- """
- 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)
- """
- 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,
- is_add)
-
- def nat44_add_address(self, ip, is_add=1, vrf_id=0xFFFFFFFF):
- """
- Add/delete NAT44 address
-
- :param ip: IP address
- :param is_add: 1 if add, 0 if delete (Default add)
- """
- 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)
-
def test_dynamic(self):
""" NAT44 dynamic translation test """
self.verify_capture_out(capture, same_port=True, packet_num=1)
self.assert_equal(capture[0][IP].proto, IP_PROTOS.icmp)
+ 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_in(self):
""" 1:1 NAT initialized from inside network """
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_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},
- {'addr': server2.ip4n,
- 'port': local_port,
- 'probability': 30}]
+ def test_dynamic_to_static(self):
+ """ Switch from dynamic translation to 1:1NAT """
+ nat_ip = "10.0.0.10"
+ self.tcp_port_out = 6303
+ self.udp_port_out = 6304
+ self.icmp_id_out = 6305
self.nat44_add_address(self.nat_addr)
- 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
+ # dynamic
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture)
+
+ # 1:1NAT
+ self.nat44_add_static_mapping(self.pg0.remote_ip4, nat_ip)
+ sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0)
+ self.assertEqual(len(sessions), 0)
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out(capture, nat_ip, True)
+
+ def test_identity_nat(self):
+ """ Identity NAT """
+
+ 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)
+
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)
+ 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
- # 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)
- 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):
+ """ Identity NAT with addresses from interface """
+
+ port = 53053
+ self.vapi.nat44_add_interface_addr(self.pg7.sw_if_index)
+ self.vapi.nat44_add_del_identity_mapping(
+ sw_if_index=self.pg7.sw_if_index,
+ port=port,
+ protocol=IP_PROTOS.tcp,
+ addr_only=0)
+
+ # identity mappings with external interface
+ identity_mappings = self.vapi.nat44_identity_mapping_dump()
+ self.assertEqual(1, len(identity_mappings))
+ self.assertEqual(self.pg7.sw_if_index,
+ identity_mappings[0].sw_if_index)
+
+ # configure interface address and check identity mappings
+ self.pg7.config_ip4()
+ identity_mappings = self.vapi.nat44_identity_mapping_dump()
+ resolved = False
+ self.assertEqual(2, len(identity_mappings))
+ for sm in identity_mappings:
+ if sm.sw_if_index == 0xFFFFFFFF:
+ self.assertEqual(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(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.verify_capture_out(capture)
self.nat44_add_address(self.nat_addr, is_add=0)
self.vapi.cli("ipfix flush") # FIXME this should be an API call
- capture = self.pg3.get_capture(3)
+ capture = self.pg3.get_capture(9)
ipfix = IPFIXDecoder()
# first load template
for p in capture:
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(3)
+ capture = self.pg3.get_capture(9)
ipfix = IPFIXDecoder()
# first load template
for p in capture:
data = ipfix.decode_data_set(p.getlayer(Set))
self.verify_ipfix_addr_exhausted(data)
+ @unittest.skipUnless(running_extended_tests(), "part of extended tests")
+ def test_ipfix_max_sessions(self):
+ """ IPFIX logging maximum session entries exceeded """
+ self.nat44_add_address(self.nat_addr)
+ 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)
+
+ nat44_config = self.vapi.nat_show_config()
+ max_sessions = 10 * nat44_config.translation_buckets
+
+ pkts = []
+ for i in range(0, max_sessions):
+ src = "10.10.%u.%u" % ((i & 0xFF00) >> 8, i & 0xFF)
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=src, dst=self.pg1.remote_ip4) /
+ TCP(sport=1025))
+ pkts.append(p)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ self.pg1.get_capture(max_sessions)
+ self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n,
+ src_address=self.pg3.local_ip4n,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.nat_ipfix(domain_id=self.ipfix_domain_id,
+ src_port=self.ipfix_src_port)
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=1025))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.assert_nothing_captured()
+ sleep(1)
+ self.vapi.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_sessions(data, max_sessions)
+
def test_pool_addr_fib(self):
""" NAT44 add pool addresses to FIB """
static_addr = '10.0.0.10'
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 """
nat_ip2 = "10.0.0.11"
self.nat44_add_address(nat_ip1)
- self.nat44_add_address(nat_ip2)
+ self.nat44_add_address(nat_ip2, vrf_id=99)
self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg1.sw_if_index)
self.vapi.nat44_interface_add_del_feature(self.pg2.sw_if_index,
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
- def tearDown(self):
- super(TestNAT44, self).tearDown()
- if not self.vpp_dead:
- self.logger.info(self.vapi.cli("show nat44 verbose"))
- self.clear_nat44()
+ def test_del_session(self):
+ """ Delete NAT44 session """
+ 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)
+ pkts = self.create_stream_in(self.pg0, self.pg1)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(len(pkts))
-class TestDeterministicNAT(MethodHolder):
- """ Deterministic NAT Test Cases """
+ sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0)
+ nsessions = len(sessions)
- @classmethod
- def setUpConstants(cls):
- super(TestDeterministicNAT, cls).setUpConstants()
- cls.vpp_cmdline.extend(["nat", "{", "deterministic", "}"])
+ self.vapi.nat44_del_session(sessions[0].inside_ip_address,
+ sessions[0].inside_port,
+ sessions[0].protocol)
+ self.vapi.nat44_del_session(sessions[1].outside_ip_address,
+ sessions[1].outside_port,
+ sessions[1].protocol,
+ is_in=0)
- @classmethod
- def setUpClass(cls):
- super(TestDeterministicNAT, cls).setUpClass()
+ sessions = self.vapi.nat44_user_session_dump(self.pg0.remote_ip4n, 0)
+ self.assertEqual(nsessions - len(sessions), 2)
- try:
- cls.tcp_port_in = 6303
- cls.tcp_external_port = 6303
- cls.udp_port_in = 6304
- cls.udp_external_port = 6304
- cls.icmp_id_in = 6305
- cls.nat_addr = '10.0.0.3'
+ def test_set_get_reass(self):
+ """ NAT44 set/get virtual fragmentation reassembly """
+ reas_cfg1 = self.vapi.nat_get_reass()
- cls.create_pg_interfaces(range(3))
- cls.interfaces = list(cls.pg_interfaces)
+ self.vapi.nat_set_reass(timeout=reas_cfg1.ip4_timeout + 5,
+ max_reass=reas_cfg1.ip4_max_reass * 2,
+ max_frag=reas_cfg1.ip4_max_frag * 2)
- for i in cls.interfaces:
- i.admin_up()
- i.config_ip4()
- i.resolve_arp()
+ reas_cfg2 = self.vapi.nat_get_reass()
- cls.pg0.generate_remote_hosts(2)
+ self.assertEqual(reas_cfg1.ip4_timeout + 5, reas_cfg2.ip4_timeout)
+ self.assertEqual(reas_cfg1.ip4_max_reass * 2, reas_cfg2.ip4_max_reass)
+ self.assertEqual(reas_cfg1.ip4_max_frag * 2, reas_cfg2.ip4_max_frag)
+
+ self.vapi.nat_set_reass(drop_frag=1)
+ self.assertTrue(self.vapi.nat_get_reass().ip4_drop_frag)
+
+ def test_frag_in_order(self):
+ """ NAT44 translate fragments arriving in order """
+ self.nat44_add_address(self.nat_addr)
+ 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)
+
+ data = "A" * 4 + "B" * 16 + "C" * 3
+ self.tcp_port_in = random.randint(1025, 65535)
+
+ reass = self.vapi.nat_reass_dump()
+ reass_n_start = len(reass)
+
+ # in2out
+ pkts = self.create_stream_frag(self.pg0,
+ self.pg1.remote_ip4,
+ self.tcp_port_in,
+ 20,
+ data)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg1.get_capture(len(pkts))
+ p = self.reass_frags_and_verify(frags,
+ self.nat_addr,
+ self.pg1.remote_ip4)
+ self.assertEqual(p[TCP].dport, 20)
+ self.assertNotEqual(p[TCP].sport, self.tcp_port_in)
+ self.tcp_port_out = p[TCP].sport
+ self.assertEqual(data, p[Raw].load)
+
+ # out2in
+ pkts = self.create_stream_frag(self.pg1,
+ self.nat_addr,
+ 20,
+ self.tcp_port_out,
+ data)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg0.get_capture(len(pkts))
+ p = self.reass_frags_and_verify(frags,
+ self.pg1.remote_ip4,
+ self.pg0.remote_ip4)
+ self.assertEqual(p[TCP].sport, 20)
+ self.assertEqual(p[TCP].dport, self.tcp_port_in)
+ self.assertEqual(data, p[Raw].load)
+
+ reass = self.vapi.nat_reass_dump()
+ reass_n_end = len(reass)
+
+ self.assertEqual(reass_n_end - reass_n_start, 2)
+
+ def test_reass_hairpinning(self):
+ """ NAT44 fragments hairpinning """
+ server = self.pg0.remote_hosts[1]
+ host_in_port = random.randint(1025, 65535)
+ server_in_port = random.randint(1025, 65535)
+ server_out_port = random.randint(1025, 65535)
+ data = "A" * 4 + "B" * 16 + "C" * 3
+
+ 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, self.nat_addr,
+ server_in_port, server_out_port,
+ proto=IP_PROTOS.tcp)
+
+ # send packet from host to server
+ pkts = self.create_stream_frag(self.pg0,
+ self.nat_addr,
+ host_in_port,
+ server_out_port,
+ data)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg0.get_capture(len(pkts))
+ p = self.reass_frags_and_verify(frags,
+ self.nat_addr,
+ server.ip4)
+ self.assertNotEqual(p[TCP].sport, host_in_port)
+ self.assertEqual(p[TCP].dport, server_in_port)
+ self.assertEqual(data, p[Raw].load)
+
+ def test_frag_out_of_order(self):
+ """ NAT44 translate fragments arriving out of order """
+ 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)
+
+ data = "A" * 4 + "B" * 16 + "C" * 3
+ random.randint(1025, 65535)
+
+ # in2out
+ pkts = self.create_stream_frag(self.pg0,
+ self.pg1.remote_ip4,
+ self.tcp_port_in,
+ 20,
+ data)
+ pkts.reverse()
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg1.get_capture(len(pkts))
+ p = self.reass_frags_and_verify(frags,
+ self.nat_addr,
+ self.pg1.remote_ip4)
+ self.assertEqual(p[TCP].dport, 20)
+ self.assertNotEqual(p[TCP].sport, self.tcp_port_in)
+ self.tcp_port_out = p[TCP].sport
+ self.assertEqual(data, p[Raw].load)
+
+ # out2in
+ pkts = self.create_stream_frag(self.pg1,
+ self.nat_addr,
+ 20,
+ self.tcp_port_out,
+ data)
+ pkts.reverse()
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg0.get_capture(len(pkts))
+ p = self.reass_frags_and_verify(frags,
+ self.pg1.remote_ip4,
+ self.pg0.remote_ip4)
+ self.assertEqual(p[TCP].sport, 20)
+ self.assertEqual(p[TCP].dport, self.tcp_port_in)
+ self.assertEqual(data, p[Raw].load)
+
+ def test_port_restricted(self):
+ """ Port restricted NAT44 (MAP-E CE) """
+ 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.cli("nat addr-port-assignment-alg map-e psid 10 "
+ "psid-offset 6 psid-len 6")
+
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ TCP(sport=4567, dport=22))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IP]
+ tcp = p[TCP]
+ self.assertEqual(ip.dst, self.pg1.remote_ip4)
+ self.assertEqual(ip.src, self.nat_addr)
+ self.assertEqual(tcp.dport, 22)
+ self.assertNotEqual(tcp.sport, 4567)
+ self.assertEqual((tcp.sport >> 6) & 63, 10)
+ self.assert_packet_checksums_valid(p)
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ def test_ipfix_max_frags(self):
+ """ IPFIX logging maximum fragments pending reassembly exceeded """
+ 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,
+ path_mtu=512,
+ template_interval=10)
+ 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])
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ 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 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.vapi.cli("nat addr-port-assignment-alg default")
+ 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(5))
+ 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()
+
+ 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)
+
+ # 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},
+ {'addr': server2.ip4n,
+ 'port': local_port,
+ 'probability': 30}]
+
+ 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},
+ {'addr': server2.ip4n,
+ 'port': local_port,
+ 'probability': 10}]
+
+ 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},
+ {'addr': server2.ip4n,
+ 'port': local_port,
+ 'probability': 30}]
+
+ 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_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 twice_nat_common(self, self_twice_nat=False, same_pg=False, lb=False,
+ client_id=None):
+ twice_nat_addr = '10.0.1.3'
+
+ port_in = 8080
+ if lb:
+ if not same_pg:
+ port_in1 = port_in
+ port_in2 = port_in
+ else:
+ port_in1 = port_in+1
+ port_in2 = port_in+2
+
+ port_out = 80
+ eh_port_out = 4567
+
+ server1 = self.pg0.remote_hosts[0]
+ server2 = self.pg0.remote_hosts[1]
+ if lb and same_pg:
+ server2 = server1
+ if not lb:
+ server = server1
+
+ pg0 = self.pg0
+ if same_pg:
+ pg1 = self.pg0
+ else:
+ pg1 = self.pg1
+
+ eh_translate = ((not self_twice_nat) or (not lb and same_pg) or
+ client_id == 1)
+
+ self.nat44_add_address(self.nat_addr)
+ self.nat44_add_address(twice_nat_addr, twice_nat=1)
+ 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},
+ {'addr': server2.ip4n,
+ 'port': port_in2,
+ 'probability': 50}]
+ 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 tearDown(self):
+ super(TestNAT44EndpointDependent, 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 nat44 hash tables detail"))
+ self.clear_nat44()
+ self.vapi.cli("clear logging")
+
+
+class TestNAT44Out2InDPO(MethodHolder):
+ """ NAT44 Test Cases using out2in DPO """
+
+ @classmethod
+ def setUpConstants(cls):
+ super(TestNAT44Out2InDPO, cls).setUpConstants()
+ cls.vpp_cmdline.extend(["nat", "{", "out2in dpo", "}"])
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestNAT44Out2InDPO, cls).setUpClass()
+ cls.vapi.cli("set log class nat level debug")
+
+ try:
+ cls.tcp_port_in = 6303
+ cls.tcp_port_out = 6303
+ cls.udp_port_in = 6304
+ cls.udp_port_out = 6304
+ cls.icmp_id_in = 6305
+ cls.icmp_id_out = 6305
+ cls.nat_addr = '10.0.0.3'
+ cls.nat_addr_n = socket.inet_pton(socket.AF_INET, cls.nat_addr)
+ cls.dst_ip4 = '192.168.70.1'
+
+ cls.create_pg_interfaces(range(2))
+
+ cls.pg0.admin_up()
+ cls.pg0.config_ip4()
+ cls.pg0.resolve_arp()
+
+ cls.pg1.admin_up()
+ cls.pg1.config_ip6()
+ cls.pg1.resolve_ndp()
+
+ cls.vapi.ip_add_del_route(is_ipv6=True, dst_address='\x00'*16,
+ dst_address_length=0,
+ next_hop_address=cls.pg1.remote_ip6n,
+ next_hop_sw_if_index=cls.pg1.sw_if_index)
+
+ except Exception:
+ super(TestNAT44Out2InDPO, cls).tearDownClass()
+ raise
+
+ def configure_xlat(self):
+ self.dst_ip6_pfx = '1:2:3::'
+ self.dst_ip6_pfx_n = socket.inet_pton(socket.AF_INET6,
+ self.dst_ip6_pfx)
+ self.dst_ip6_pfx_len = 96
+ self.src_ip6_pfx = '4:5:6::'
+ self.src_ip6_pfx_n = socket.inet_pton(socket.AF_INET6,
+ self.src_ip6_pfx)
+ self.src_ip6_pfx_len = 96
+ self.vapi.map_add_domain(self.dst_ip6_pfx_n, self.dst_ip6_pfx_len,
+ self.src_ip6_pfx_n, self.src_ip6_pfx_len,
+ '\x00\x00\x00\x00', 0, is_translation=1,
+ is_rfc6052=1)
+
+ def test_464xlat_ce(self):
+ """ Test 464XLAT CE with NAT44 """
+
+ self.configure_xlat()
+
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index)
+ self.vapi.nat44_add_del_address_range(self.nat_addr_n, self.nat_addr_n)
+
+ out_src_ip6 = self.compose_ip6(self.dst_ip4, self.dst_ip6_pfx,
+ self.dst_ip6_pfx_len)
+ out_dst_ip6 = self.compose_ip6(self.nat_addr, self.src_ip6_pfx,
+ self.src_ip6_pfx_len)
+
+ try:
+ pkts = self.create_stream_in(self.pg0, self.pg1, self.dst_ip4)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out_ip6(capture, nat_ip=out_dst_ip6,
+ dst_ip=out_src_ip6)
+
+ pkts = self.create_stream_out_ip6(self.pg1, out_src_ip6,
+ out_dst_ip6)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+ finally:
+ self.vapi.nat44_interface_add_del_feature(self.pg0.sw_if_index,
+ is_add=0)
+ self.vapi.nat44_add_del_address_range(self.nat_addr_n,
+ self.nat_addr_n, is_add=0)
+
+ def test_464xlat_ce_no_nat(self):
+ """ Test 464XLAT CE without NAT44 """
+
+ self.configure_xlat()
+
+ out_src_ip6 = self.compose_ip6(self.dst_ip4, self.dst_ip6_pfx,
+ self.dst_ip6_pfx_len)
+ out_dst_ip6 = self.compose_ip6(self.pg0.remote_ip4, self.src_ip6_pfx,
+ self.src_ip6_pfx_len)
+
+ pkts = self.create_stream_in(self.pg0, self.pg1, self.dst_ip4)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(len(pkts))
+ self.verify_capture_out_ip6(capture, dst_ip=out_src_ip6,
+ nat_ip=out_dst_ip6, same_port=True)
+
+ pkts = self.create_stream_out_ip6(self.pg1, out_src_ip6, out_dst_ip6)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(len(pkts))
+ self.verify_capture_in(capture, self.pg0)
+
+
+class TestDeterministicNAT(MethodHolder):
+ """ Deterministic NAT Test Cases """
+
+ @classmethod
+ def setUpConstants(cls):
+ super(TestDeterministicNAT, cls).setUpConstants()
+ cls.vpp_cmdline.extend(["nat", "{", "deterministic", "}"])
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestDeterministicNAT, cls).setUpClass()
+ cls.vapi.cli("set log class nat level debug")
+
+ try:
+ cls.tcp_port_in = 6303
+ cls.tcp_external_port = 6303
+ cls.udp_port_in = 6304
+ cls.udp_external_port = 6304
+ cls.icmp_id_in = 6305
+ cls.nat_addr = '10.0.0.3'
+
+ cls.create_pg_interfaces(range(3))
+ cls.interfaces = list(cls.pg_interfaces)
+
+ for i in cls.interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ cls.pg0.generate_remote_hosts(2)
cls.pg0.configure_ipv4_neighbors()
except Exception:
# ICMP
p = (Ether(dst=out_if.local_mac, src=out_if.remote_mac) /
IP(src=out_if.remote_ip4, dst=dst_ip, ttl=ttl) /
- ICMP(id=self.icmp_external_id, type='echo-reply'))
- pkts.append(p)
-
- return pkts
-
- def verify_capture_out(self, capture, nat_ip=None, packet_num=3):
- """
- 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)
- if packet.haslayer(TCP):
- self.tcp_port_out = packet[TCP].sport
- elif packet.haslayer(UDP):
- self.udp_port_out = packet[UDP].sport
- else:
- self.icmp_external_id = packet[ICMP].id
- except:
- self.logger.error(ppp("Unexpected or invalid packet "
- "(outside network):", packet))
- raise
-
- def 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)
+ ICMP(id=self.icmp_external_id, type='echo-reply'))
+ pkts.append(p)
- # 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)
+ return pkts
- except:
- self.logger.error("TCP 3 way handshake failed")
- raise
+ def verify_capture_out(self, capture, nat_ip=None, packet_num=3):
+ """
+ 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)
+ if packet.haslayer(TCP):
+ self.tcp_port_out = packet[TCP].sport
+ elif packet.haslayer(UDP):
+ self.udp_port_out = packet[UDP].sport
+ else:
+ self.icmp_external_id = packet[ICMP].id
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet "
+ "(outside network):", packet))
+ raise
def verify_ipfix_max_entries_per_user(self, data):
"""
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 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 nat44 deterministic mappings"))
+ self.logger.info(
+ self.vapi.cli("show nat44 deterministic timeouts"))
+ self.logger.info(
+ self.vapi.cli("show nat44 deterministic sessions"))
self.clear_nat_det()
class TestNAT64(MethodHolder):
""" NAT64 Test Cases """
+ @classmethod
+ def setUpConstants(cls):
+ super(TestNAT64, cls).setUpConstants()
+ cls.vpp_cmdline.extend(["nat", "{", "nat64 bib hash buckets 128",
+ "nat64 st hash buckets 256", "}"])
+
@classmethod
def setUpClass(cls):
super(TestNAT64, cls).setUpClass()
cls.vrf1_nat_addr = '10.0.10.3'
cls.vrf1_nat_addr_n = socket.inet_pton(socket.AF_INET,
cls.vrf1_nat_addr)
+ cls.ipfix_src_port = 4739
+ cls.ipfix_domain_id = 1
- cls.create_pg_interfaces(range(4))
+ cls.create_pg_interfaces(range(5))
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])
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
+
+ # out2in
+ p = (Ether(src=self.pg3.remote_mac, dst=self.pg3.local_mac) /
+ IP(src=self.pg3.remote_ip4, dst=self.nat_addr) /
+ TCP(sport=80, dport=external_port))
+ self.pg3.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg3.get_capture(1)
+ p = capture[0]
+ try:
+ ip = p[IPv6]
+ tcp = p[TCP]
+ self.assertEqual(ip.src, remote_host_ip6)
+ self.assertEqual(ip.dst, self.pg3.remote_ip6)
+ self.assertEqual(tcp.sport, 80)
+ self.assertEqual(tcp.dport, 12345)
+ self.assert_packet_checksums_valid(p)
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
raise
- # out2in
- p = (Ether(src=self.pg3.remote_mac, dst=self.pg3.local_mac) /
- IP(src=self.pg3.remote_ip4, dst=self.nat_addr) /
- TCP(sport=80, dport=external_port))
- self.pg3.add_stream(p)
+ def test_frag_in_order(self):
+ """ NAT64 translate fragments arriving in order """
+ self.tcp_port_in = random.randint(1025, 65535)
+
+ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n,
+ 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)
+
+ reass = self.vapi.nat_reass_dump()
+ reass_n_start = len(reass)
+
+ # in2out
+ data = 'a' * 200
+ pkts = self.create_stream_frag_ip6(self.pg0, self.pg1.remote_ip4,
+ self.tcp_port_in, 20, data)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg1.get_capture(len(pkts))
+ p = self.reass_frags_and_verify(frags,
+ self.nat_addr,
+ self.pg1.remote_ip4)
+ self.assertEqual(p[TCP].dport, 20)
+ self.assertNotEqual(p[TCP].sport, self.tcp_port_in)
+ self.tcp_port_out = p[TCP].sport
+ self.assertEqual(data, p[Raw].load)
+
+ # out2in
+ data = "A" * 4 + "b" * 16 + "C" * 3
+ pkts = self.create_stream_frag(self.pg1,
+ self.nat_addr,
+ 20,
+ self.tcp_port_out,
+ data)
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg0.get_capture(len(pkts))
+ src = self.compose_ip6(self.pg1.remote_ip4, '64:ff9b::', 96)
+ p = self.reass_frags_and_verify_ip6(frags, src, self.pg0.remote_ip6)
+ self.assertEqual(p[TCP].sport, 20)
+ self.assertEqual(p[TCP].dport, self.tcp_port_in)
+ self.assertEqual(data, p[Raw].load)
+
+ reass = self.vapi.nat_reass_dump()
+ reass_n_end = len(reass)
+
+ self.assertEqual(reass_n_end - reass_n_start, 2)
+
+ def test_reass_hairpinning(self):
+ """ NAT64 fragments hairpinning """
+ data = 'a' * 200
+ server = self.pg0.remote_hosts[1]
+ server_in_port = random.randint(1025, 65535)
+ server_out_port = random.randint(1025, 65535)
+ client_in_port = random.randint(1025, 65535)
+ ip = IPv6(src=''.join(['64:ff9b::', self.nat_addr]))
+ nat_addr_ip6 = ip.src
+
+ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n,
+ 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)
+
+ # add static BIB entry for server
+ self.vapi.nat64_add_del_static_bib(server.ip6n,
+ self.nat_addr_n,
+ server_in_port,
+ server_out_port,
+ IP_PROTOS.tcp)
+
+ # send packet from host to server
+ pkts = self.create_stream_frag_ip6(self.pg0,
+ self.nat_addr,
+ client_in_port,
+ server_out_port,
+ data)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg0.get_capture(len(pkts))
+ p = self.reass_frags_and_verify_ip6(frags, nat_addr_ip6, server.ip6)
+ self.assertNotEqual(p[TCP].sport, client_in_port)
+ self.assertEqual(p[TCP].dport, server_in_port)
+ self.assertEqual(data, p[Raw].load)
+
+ def test_frag_out_of_order(self):
+ """ NAT64 translate fragments arriving out of order """
+ self.tcp_port_in = random.randint(1025, 65535)
+
+ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n,
+ 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)
+
+ # in2out
+ data = 'a' * 200
+ pkts = self.create_stream_frag_ip6(self.pg0, self.pg1.remote_ip4,
+ self.tcp_port_in, 20, data)
+ pkts.reverse()
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg1.get_capture(len(pkts))
+ p = self.reass_frags_and_verify(frags,
+ self.nat_addr,
+ self.pg1.remote_ip4)
+ self.assertEqual(p[TCP].dport, 20)
+ self.assertNotEqual(p[TCP].sport, self.tcp_port_in)
+ self.tcp_port_out = p[TCP].sport
+ self.assertEqual(data, p[Raw].load)
+
+ # out2in
+ data = "A" * 4 + "B" * 16 + "C" * 3
+ pkts = self.create_stream_frag(self.pg1,
+ self.nat_addr,
+ 20,
+ self.tcp_port_out,
+ data)
+ pkts.reverse()
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ frags = self.pg0.get_capture(len(pkts))
+ src = self.compose_ip6(self.pg1.remote_ip4, '64:ff9b::', 96)
+ p = self.reass_frags_and_verify_ip6(frags, src, self.pg0.remote_ip6)
+ self.assertEqual(p[TCP].sport, 20)
+ self.assertEqual(p[TCP].dport, self.tcp_port_in)
+ self.assertEqual(data, p[Raw].load)
+
+ def test_interface_addr(self):
+ """ Acquire NAT64 pool addresses from interface """
+ self.vapi.nat64_add_interface_addr(self.pg4.sw_if_index)
+
+ # no address in NAT64 pool
+ adresses = self.vapi.nat44_address_dump()
+ self.assertEqual(0, len(adresses))
+
+ # configure interface address and check NAT64 address pool
+ self.pg4.config_ip4()
+ addresses = self.vapi.nat64_pool_addr_dump()
+ self.assertEqual(len(addresses), 1)
+ self.assertEqual(addresses[0].address, self.pg4.local_ip4n)
+
+ # remove interface address and check NAT64 address pool
+ self.pg4.unconfig_ip4()
+ addresses = self.vapi.nat64_pool_addr_dump()
+ self.assertEqual(0, len(adresses))
+
+ @unittest.skipUnless(running_extended_tests(), "part of extended tests")
+ def test_ipfix_max_bibs_sessions(self):
+ """ IPFIX logging maximum session and BIB entries exceeded """
+ max_bibs = 1280
+ max_sessions = 2560
+ remote_host_ip6 = self.compose_ip6(self.pg1.remote_ip4,
+ '64:ff9b::',
+ 96)
+
+ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n,
+ 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)
+
+ pkts = []
+ src = ""
+ for i in range(0, max_bibs):
+ src = "fd01:aa::%x" % (i)
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=src, dst=remote_host_ip6) /
+ TCP(sport=12345, dport=80))
+ pkts.append(p)
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=src, dst=remote_host_ip6) /
+ TCP(sport=12345, dport=22))
+ pkts.append(p)
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.get_capture(max_sessions)
+
+ self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n,
+ src_address=self.pg3.local_ip4n,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.nat_ipfix(domain_id=self.ipfix_domain_id,
+ src_port=self.ipfix_src_port)
+
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=src, dst=remote_host_ip6) /
+ TCP(sport=12345, dport=25))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.assert_nothing_captured()
+ sleep(1)
+ self.vapi.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_sessions(data, max_sessions)
+
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=self.pg0.remote_ip6, dst=remote_host_ip6) /
+ TCP(sport=12345, dport=80))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.pg1.assert_nothing_captured()
+ sleep(1)
+ self.vapi.cli("ipfix flush") # FIXME this should be an API call
+ capture = self.pg3.get_capture(1)
+ # verify events in data set
+ for p in capture:
+ self.assertTrue(p.haslayer(IPFIX))
+ self.assertEqual(p[IP].src, self.pg3.local_ip4)
+ self.assertEqual(p[IP].dst, self.pg3.remote_ip4)
+ self.assertEqual(p[UDP].sport, self.ipfix_src_port)
+ self.assertEqual(p[UDP].dport, 4739)
+ self.assertEqual(p[IPFIX].observationDomainID,
+ self.ipfix_domain_id)
+ if p.haslayer(Data):
+ data = ipfix.decode_data_set(p.getlayer(Set))
+ self.verify_ipfix_max_bibs(data, max_bibs)
+
+ def test_ipfix_max_frags(self):
+ """ IPFIX logging maximum fragments pending reassembly exceeded """
+ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n,
+ 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.nat_set_reass(max_frag=0, is_ip6=1)
+ self.vapi.set_ipfix_exporter(collector_address=self.pg3.remote_ip4n,
+ src_address=self.pg3.local_ip4n,
+ path_mtu=512,
+ template_interval=10)
+ self.vapi.nat_ipfix(domain_id=self.ipfix_domain_id,
+ src_port=self.ipfix_src_port)
+
+ data = 'a' * 200
+ pkts = self.create_stream_frag_ip6(self.pg0, self.pg1.remote_ip4,
+ self.tcp_port_in, 20, data)
+ self.pg0.add_stream(pkts[-1])
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ 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_ip6(data, 0,
+ self.pg0.remote_ip6n)
+
+ def test_ipfix_bib_ses(self):
+ """ IPFIX logging NAT64 BIB/session create and delete events """
+ self.tcp_port_in = random.randint(1025, 65535)
+ remote_host_ip6 = self.compose_ip6(self.pg1.remote_ip4,
+ '64:ff9b::',
+ 96)
+
+ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n,
+ 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.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)
+
+ # Create
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IPv6(src=self.pg0.remote_ip6, dst=remote_host_ip6) /
+ TCP(sport=self.tcp_port_in, dport=25))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ p = self.pg1.get_capture(1)
+ self.tcp_port_out = p[0][TCP].sport
+ self.vapi.cli("ipfix flush") # FIXME this should be an API call
+ capture = self.pg3.get_capture(10)
+ ipfix = IPFIXDecoder()
+ # first load template
+ for p in capture:
+ self.assertTrue(p.haslayer(IPFIX))
+ self.assertEqual(p[IP].src, self.pg3.local_ip4)
+ self.assertEqual(p[IP].dst, self.pg3.remote_ip4)
+ self.assertEqual(p[UDP].sport, self.ipfix_src_port)
+ self.assertEqual(p[UDP].dport, 4739)
+ self.assertEqual(p[IPFIX].observationDomainID,
+ self.ipfix_domain_id)
+ if p.haslayer(Template):
+ ipfix.add_template(p.getlayer(Template))
+ # verify events in data set
+ for p in capture:
+ if p.haslayer(Data):
+ data = ipfix.decode_data_set(p.getlayer(Set))
+ if ord(data[0][230]) == 10:
+ self.verify_ipfix_bib(data, 1, self.pg0.remote_ip6n)
+ elif ord(data[0][230]) == 6:
+ self.verify_ipfix_nat64_ses(data,
+ 1,
+ self.pg0.remote_ip6n,
+ self.pg1.remote_ip4,
+ 25)
+ else:
+ self.logger.error(ppp("Unexpected or invalid packet: ", p))
+
+ # Delete
self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- capture = self.pg3.get_capture(1)
- p = capture[0]
- try:
- ip = p[IPv6]
- tcp = p[TCP]
- self.assertEqual(ip.src, remote_host_ip6)
- self.assertEqual(ip.dst, self.pg3.remote_ip6)
- self.assertEqual(tcp.sport, 80)
- self.assertEqual(tcp.dport, 12345)
- self.check_tcp_checksum(p)
- except:
- self.logger.error(ppp("Unexpected or invalid packet:", p))
- raise
+ self.vapi.nat64_add_del_pool_addr_range(self.nat_addr_n,
+ self.nat_addr_n,
+ is_add=0)
+ self.vapi.cli("ipfix flush") # FIXME this should be an API call
+ capture = self.pg3.get_capture(2)
+ # verify events in data set
+ for p in capture:
+ self.assertTrue(p.haslayer(IPFIX))
+ self.assertEqual(p[IP].src, self.pg3.local_ip4)
+ self.assertEqual(p[IP].dst, self.pg3.remote_ip4)
+ self.assertEqual(p[UDP].sport, self.ipfix_src_port)
+ self.assertEqual(p[UDP].dport, 4739)
+ self.assertEqual(p[IPFIX].observationDomainID,
+ self.ipfix_domain_id)
+ if p.haslayer(Data):
+ data = ipfix.decode_data_set(p.getlayer(Set))
+ if ord(data[0][230]) == 11:
+ self.verify_ipfix_bib(data, 0, self.pg0.remote_ip6n)
+ elif ord(data[0][230]) == 7:
+ self.verify_ipfix_nat64_ses(data,
+ 0,
+ self.pg0.remote_ip6n,
+ self.pg1.remote_ip4,
+ 25)
+ else:
+ self.logger.error(ppp("Unexpected or invalid packet: ", p))
def nat64_get_ses_num(self):
"""
"""
Clear NAT64 configuration.
"""
+ 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
+
self.vapi.nat64_set_timeouts()
interfaces = self.vapi.nat64_interface_dump()
intf.is_inside,
is_add=0)
- bib = self.vapi.nat64_bib_dump(IP_PROTOS.tcp)
- for bibe in bib:
- if bibe.is_static:
- self.vapi.nat64_add_del_static_bib(bibe.i_addr,
- bibe.o_addr,
- bibe.i_port,
- bibe.o_port,
- bibe.proto,
- bibe.vrf_id,
- is_add=0)
-
- bib = self.vapi.nat64_bib_dump(IP_PROTOS.udp)
- for bibe in bib:
- if bibe.is_static:
- self.vapi.nat64_add_del_static_bib(bibe.i_addr,
- bibe.o_addr,
- bibe.i_port,
- bibe.o_port,
- bibe.proto,
- bibe.vrf_id,
- is_add=0)
-
- bib = self.vapi.nat64_bib_dump(IP_PROTOS.icmp)
+ bib = self.vapi.nat64_bib_dump(255)
for bibe in bib:
if bibe.is_static:
self.vapi.nat64_add_del_static_bib(bibe.i_addr,
self.logger.info(self.vapi.cli("show nat64 prefix"))
self.logger.info(self.vapi.cli("show nat64 bib all"))
self.logger.info(self.vapi.cli("show nat64 session table all"))
+ self.logger.info(self.vapi.cli("show nat virtual-reassembly"))
self.clear_nat64()
+
+class TestDSlite(MethodHolder):
+ """ DS-Lite Test Cases """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestDSlite, cls).setUpClass()
+
+ try:
+ cls.nat_addr = '10.0.0.3'
+ cls.nat_addr_n = socket.inet_pton(socket.AF_INET, cls.nat_addr)
+
+ 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(2)
+ cls.pg1.configure_ipv6_neighbors()
+
+ except Exception:
+ super(TestDSlite, cls).tearDownClass()
+ raise
+
+ def test_dslite(self):
+ """ Test DS-Lite """
+ self.vapi.dslite_add_del_pool_addr_range(self.nat_addr_n,
+ self.nat_addr_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)
+
+ # UDP
+ p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IPv6(dst=aftr_ip6, src=self.pg1.remote_hosts[0].ip6) /
+ IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
+ UDP(sport=20000, dport=10000))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ capture = capture[0]
+ self.assertFalse(capture.haslayer(IPv6))
+ self.assertEqual(capture[IP].src, self.nat_addr)
+ self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
+ self.assertNotEqual(capture[UDP].sport, 20000)
+ self.assertEqual(capture[UDP].dport, 10000)
+ self.assert_packet_checksums_valid(capture)
+ out_port = capture[UDP].sport
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(dst=self.nat_addr, src=self.pg0.remote_ip4) /
+ UDP(sport=10000, dport=out_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ capture = capture[0]
+ self.assertEqual(capture[IPv6].src, aftr_ip6)
+ self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[0].ip6)
+ self.assertEqual(capture[IP].src, self.pg0.remote_ip4)
+ self.assertEqual(capture[IP].dst, '192.168.1.1')
+ self.assertEqual(capture[UDP].sport, 10000)
+ self.assertEqual(capture[UDP].dport, 20000)
+ self.assert_packet_checksums_valid(capture)
+
+ # TCP
+ p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IPv6(dst=aftr_ip6, src=self.pg1.remote_hosts[1].ip6) /
+ IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
+ TCP(sport=20001, dport=10001))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ capture = capture[0]
+ self.assertFalse(capture.haslayer(IPv6))
+ self.assertEqual(capture[IP].src, self.nat_addr)
+ self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
+ self.assertNotEqual(capture[TCP].sport, 20001)
+ self.assertEqual(capture[TCP].dport, 10001)
+ self.assert_packet_checksums_valid(capture)
+ out_port = capture[TCP].sport
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(dst=self.nat_addr, src=self.pg0.remote_ip4) /
+ TCP(sport=10001, dport=out_port))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ capture = capture[0]
+ self.assertEqual(capture[IPv6].src, aftr_ip6)
+ self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[1].ip6)
+ self.assertEqual(capture[IP].src, self.pg0.remote_ip4)
+ self.assertEqual(capture[IP].dst, '192.168.1.1')
+ self.assertEqual(capture[TCP].sport, 10001)
+ self.assertEqual(capture[TCP].dport, 20001)
+ self.assert_packet_checksums_valid(capture)
+
+ # ICMP
+ p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IPv6(dst=aftr_ip6, src=self.pg1.remote_hosts[1].ip6) /
+ IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
+ ICMP(id=4000, type='echo-request'))
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg0.get_capture(1)
+ capture = capture[0]
+ self.assertFalse(capture.haslayer(IPv6))
+ self.assertEqual(capture[IP].src, self.nat_addr)
+ self.assertEqual(capture[IP].dst, self.pg0.remote_ip4)
+ self.assertNotEqual(capture[ICMP].id, 4000)
+ self.assert_packet_checksums_valid(capture)
+ out_id = capture[ICMP].id
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(dst=self.nat_addr, src=self.pg0.remote_ip4) /
+ ICMP(id=out_id, type='echo-reply'))
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ capture = capture[0]
+ self.assertEqual(capture[IPv6].src, aftr_ip6)
+ self.assertEqual(capture[IPv6].dst, self.pg1.remote_hosts[1].ip6)
+ self.assertEqual(capture[IP].src, self.pg0.remote_ip4)
+ self.assertEqual(capture[IP].dst, '192.168.1.1')
+ self.assertEqual(capture[ICMP].id, 4000)
+ self.assert_packet_checksums_valid(capture)
+
+ # ping DS-Lite AFTR tunnel endpoint address
+ p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IPv6(src=self.pg1.remote_hosts[1].ip6, dst=aftr_ip6) /
+ ICMPv6EchoRequest())
+ self.pg1.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ capture = self.pg1.get_capture(1)
+ 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.assertTrue(capture.haslayer(ICMPv6EchoReply))
+
+ def tearDown(self):
+ super(TestDSlite, self).tearDown()
+ if not self.vpp_dead:
+ self.logger.info(self.vapi.cli("show dslite pool"))
+ self.logger.info(
+ self.vapi.cli("show dslite aftr-tunnel-endpoint-address"))
+ self.logger.info(self.vapi.cli("show dslite sessions"))
+
+
+class TestDSliteCE(MethodHolder):
+ """ DS-Lite CE Test Cases """
+
+ @classmethod
+ def setUpConstants(cls):
+ super(TestDSliteCE, cls).setUpConstants()
+ cls.vpp_cmdline.extend(["nat", "{", "dslite ce", "}"])
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestDSliteCE, cls).setUpClass()
+
+ try:
+ cls.create_pg_interfaces(range(2))
+ cls.pg0.admin_up()
+ cls.pg0.config_ip4()
+ cls.pg0.resolve_arp()
+ cls.pg1.admin_up()
+ cls.pg1.config_ip6()
+ cls.pg1.generate_remote_hosts(1)
+ cls.pg1.configure_ipv6_neighbors()
+
+ except Exception:
+ super(TestDSliteCE, cls).tearDownClass()
+ raise
+
+ def test_dslite_ce(self):
+ """ Test DS-Lite 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)
+ self.assertEqual(1, len(capture))
+ 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)