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#!/usr/bin/env python3
import ipaddress
import unittest
from framework import VppTestCase, VppTestRunner
from vpp_ip import DpoProto
from vpp_ip_route import VppIpRoute, VppRoutePath
from util import fragment_rfc791, fragment_rfc8200
import scapy.compat
from scapy.layers.l2 import Ether
from scapy.packet import Raw
from scapy.layers.inet import IP, UDP, ICMP, TCP
from scapy.layers.inet6 import IPv6, ICMPv6TimeExceeded, IPv6ExtHdrFragment
from scapy.layers.inet6 import ICMPv6EchoRequest, ICMPv6EchoReply
class TestMAPBR(VppTestCase):
""" MAP-T Test Cases """
@classmethod
def setUpClass(cls):
super(TestMAPBR, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestMAPBR, cls).tearDownClass()
def setUp(self):
super(TestMAPBR, self).setUp()
#
# Create 2 pg interfaces.
# pg0 is IPv4
# pg1 is IPv6
#
self.create_pg_interfaces(range(2))
self.pg0.admin_up()
self.pg0.config_ip4()
self.pg1.generate_remote_hosts(20)
self.pg1.configure_ipv4_neighbors()
self.pg0.resolve_arp()
self.pg1.admin_up()
self.pg1.config_ip6()
self.pg1.generate_remote_hosts(20)
self.pg1.configure_ipv6_neighbors()
#
# BR configuration parameters used for all test.
#
self.ip4_prefix = '198.18.0.0/24'
self.ip6_prefix = '2001:db8:f0::/48'
self.ip6_src = '2001:db8:ffff:ff00::/64'
self.ea_bits_len = 12
self.psid_offset = 6
self.psid_length = 4
self.mtu = 1500
self.tag = 'MAP-T BR'
self.ipv4_internet_address = self.pg0.remote_ip4
self.ipv4_map_address = "198.18.0.12"
self.ipv4_udp_or_tcp_internet_port = 65000
self.ipv4_udp_or_tcp_map_port = 16606
self.ipv6_cpe_address = "2001:db8:f0:c30:0:c612:c:3" # 198.18.0.12
self.ipv6_spoof_address = "2001:db8:f0:c30:0:c612:1c:3" # 198.18.0.28
self.ipv6_spoof_prefix = "2001:db8:f0:c30:0:a00:c:3" # 10.0.0.12
self.ipv6_spoof_psid = "2001:db8:f0:c30:0:c612:c:4" # 4
self.ipv6_spoof_subnet = "2001:db8:f1:c30:0:c612:c:3" # f1
self.ipv6_udp_or_tcp_internet_port = 65000
self.ipv6_udp_or_tcp_map_port = 16606
self.ipv6_udp_or_tcp_spoof_port = 16862
self.ipv6_map_address = (
"2001:db8:ffff:ff00:ac:1001:200:0") # 176.16.1.2
self.ipv6_map_same_rule_diff_addr = (
"2001:db8:ffff:ff00:c6:1200:1000:0") # 198.18.0.16
self.ipv6_map_same_rule_same_addr = (
"2001:db8:ffff:ff00:c6:1200:c00:0") # 198.18.0.12
self.map_br_prefix = "2001:db8:f0::"
self.map_br_prefix_len = 48
self.psid_number = 3
#
# Add an IPv6 route to the MAP-BR.
#
map_route = VppIpRoute(self,
self.map_br_prefix,
self.map_br_prefix_len,
[VppRoutePath(self.pg1.remote_ip6,
self.pg1.sw_if_index)])
map_route.add_vpp_config()
#
# Add a MAP BR domain that maps from pg0 to pg1.
#
self.vapi.map_add_domain(ip4_prefix=self.ip4_prefix,
ip6_prefix=self.ip6_prefix,
ip6_src=self.ip6_src,
ea_bits_len=self.ea_bits_len,
psid_offset=self.psid_offset,
psid_length=self.psid_length,
mtu=self.mtu,
tag=self.tag)
#
# Set BR parameters.
#
self.vapi.map_param_set_fragmentation(inner=1, ignore_df=0)
self.vapi.map_param_set_fragmentation(inner=0, ignore_df=0)
self.vapi.map_param_set_icmp(ip4_err_relay_src=self.pg0.local_ip4)
self.vapi.map_param_set_traffic_class(copy=1)
#
# Enable MAP-T on interfaces.
#
self.vapi.map_if_enable_disable(is_enable=1,
sw_if_index=self.pg0.sw_if_index,
is_translation=1)
self.vapi.map_if_enable_disable(is_enable=1,
sw_if_index=self.pg1.sw_if_index,
is_translation=1)
self.vapi.map_if_enable_disable(is_enable=1,
sw_if_index=self.pg1.sw_if_index,
is_translation=1)
def tearDown(self):
super(TestMAPBR, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip4()
i.unconfig_ip6()
i.admin_down()
def v4_address_check(self, pkt):
self.assertEqual(pkt[IP].src, self.ipv4_map_address)
self.assertEqual(pkt[IP].dst, self.ipv4_internet_address)
def v4_port_check(self, pkt, proto):
self.assertEqual(pkt[proto].sport, self.ipv4_udp_or_tcp_map_port)
self.assertEqual(pkt[proto].dport, self.ipv4_udp_or_tcp_internet_port)
def v6_address_check(self, pkt):
self.assertEqual(pkt[IPv6].src, self.ipv6_map_address)
self.assertEqual(pkt[IPv6].dst, self.ipv6_cpe_address)
def v6_port_check(self, pkt, proto):
self.assertEqual(pkt[proto].sport, self.ipv6_udp_or_tcp_internet_port)
self.assertEqual(pkt[proto].dport, self.ipv6_udp_or_tcp_map_port)
#
# Normal translation of UDP packets v4 -> v6 direction
# Send 128 frame size packet for IPv4/UDP.
# Received packet should be translated into IPv6 packet with no
# fragment header.
#
def test_map_t_udp_ip4_to_ip6(self):
""" MAP-T UDP IPv4 -> IPv6 """
eth = Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac)
ip = IP(src=self.pg0.remote_ip4,
dst=self.ipv4_map_address,
tos=0)
udp = UDP(sport=self.ipv4_udp_or_tcp_internet_port,
dport=self.ipv4_udp_or_tcp_map_port)
payload = "a" * 82
tx_pkt = eth / ip / udp / payload
self.pg_send(self.pg0, tx_pkt * 1)
rx_pkts = self.pg1.get_capture(1)
rx_pkt = rx_pkts[0]
self.v6_address_check(rx_pkt)
self.v6_port_check(rx_pkt, UDP)
self.assertEqual(rx_pkt[IPv6].tc, 0) # IPv4 ToS passed to v6 TC
self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="UDP").nh)
#
# Normal translation of TCP packets v4 -> v6 direction.
# Send 128 frame size packet for IPv4/TCP.
# Received packet should be translated into IPv6 packet with no
# fragment header.
#
def test_map_t_tcp_ip4_to_ip6(self):
""" MAP-T TCP IPv4 -> IPv6 """
eth = Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac)
ip = IP(src=self.pg0.remote_ip4,
dst=self.ipv4_map_address,
tos=0)
tcp = TCP(sport=self.ipv4_udp_or_tcp_internet_port,
dport=self.ipv4_udp_or_tcp_map_port)
payload = "a" * 82
tx_pkt = eth / ip / tcp / payload
self.pg_send(self.pg0, tx_pkt * 1)
rx_pkts = self.pg1.get_capture(1)
rx_pkt = rx_pkts[0]
self.v6_address_check(rx_pkt)
self.v6_port_check(rx_pkt, TCP)
self.assertEqual(rx_pkt[IPv6].tc, 0) # IPv4 ToS passed to v6 TC
self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="TCP").nh)
#
# Normal translation of UDP packets v6 -> v4 direction
# Send 128 frame size packet for IPv6/UDP.
# Received packet should be translated into an IPv4 packet with DF=1.
#
def test_map_t_udp_ip6_to_ip4(self):
""" MAP-T UDP IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_cpe_address,
dst=self.ipv6_map_address)
udp = UDP(sport=self.ipv6_udp_or_tcp_map_port,
dport=self.ipv6_udp_or_tcp_internet_port)
payload = "a" * 82
tx_pkt = eth / ip / udp / payload
self.pg_send(self.pg1, tx_pkt * 1)
rx_pkts = self.pg0.get_capture(1)
rx_pkt = rx_pkts[0]
self.v4_address_check(rx_pkt)
self.v4_port_check(rx_pkt, UDP)
self.assertEqual(rx_pkt[IP].proto, IP(proto="udp").proto)
self.assertEqual(rx_pkt[IP].tos, 0) # IPv6 TC passed to v4 ToS
df_bit = IP(flags="DF").flags
self.assertNotEqual(rx_pkt[IP].flags & df_bit, df_bit)
#
# Normal translation of TCP packets v6 -> v4 direction
# Send 128 frame size packet for IPv6/TCP.
# Received packet should be translated into an IPv4 packet with DF=1
#
def test_map_t_tcp_ip6_to_ip4(self):
""" MAP-T TCP IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_cpe_address,
dst=self.ipv6_map_address)
tcp = TCP(sport=self.ipv6_udp_or_tcp_map_port,
dport=self.ipv6_udp_or_tcp_internet_port)
payload = "a" * 82
tx_pkt = eth / ip / tcp / payload
self.pg_send(self.pg1, tx_pkt * 1)
rx_pkts = self.pg0.get_capture(1)
rx_pkt = rx_pkts[0]
self.v4_address_check(rx_pkt)
self.v4_port_check(rx_pkt, TCP)
self.assertEqual(rx_pkt[IP].proto, IP(proto="tcp").proto)
self.assertEqual(rx_pkt[IP].tos, 0) # IPv6 TC passed to v4 ToS
df_bit = IP(flags="DF").flags
self.assertNotEqual(rx_pkt[IP].flags & df_bit, df_bit)
#
# Translation of ICMP Echo Request v4 -> v6 direction
# Received packet should be translated into an IPv6 Echo Request.
#
def test_map_t_echo_request_ip4_to_ip6(self):
""" MAP-T echo request IPv4 -> IPv6 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IP(src=self.pg0.remote_ip4,
dst=self.ipv4_map_address)
icmp = ICMP(type="echo-request",
id=self.ipv6_udp_or_tcp_map_port)
payload = "H" * 10
tx_pkt = eth / ip / icmp / payload
self.pg_send(self.pg0, tx_pkt * 1)
rx_pkts = self.pg1.get_capture(1)
rx_pkt = rx_pkts[0]
self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="ICMPv6").nh)
self.assertEqual(rx_pkt[ICMPv6EchoRequest].type,
ICMPv6EchoRequest(type="Echo Request").type)
self.assertEqual(rx_pkt[ICMPv6EchoRequest].code, 0)
self.assertEqual(rx_pkt[ICMPv6EchoRequest].id,
self.ipv6_udp_or_tcp_map_port)
#
# Translation of ICMP Echo Reply v4 -> v6 direction
# Received packet should be translated into an IPv6 Echo Reply.
#
def test_map_t_echo_reply_ip4_to_ip6(self):
""" MAP-T echo reply IPv4 -> IPv6 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IP(src=self.pg0.remote_ip4,
dst=self.ipv4_map_address)
icmp = ICMP(type="echo-reply",
id=self.ipv6_udp_or_tcp_map_port)
payload = "H" * 10
tx_pkt = eth / ip / icmp / payload
self.pg_send(self.pg0, tx_pkt * 1)
rx_pkts = self.pg1.get_capture(1)
rx_pkt = rx_pkts[0]
self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="ICMPv6").nh)
self.assertEqual(rx_pkt[ICMPv6EchoReply].type,
ICMPv6EchoReply(type="Echo Reply").type)
self.assertEqual(rx_pkt[ICMPv6EchoReply].code, 0)
self.assertEqual(rx_pkt[ICMPv6EchoReply].id,
self.ipv6_udp_or_tcp_map_port)
#
# Translation of ICMP Echo Request v6 -> v4 direction
# Received packet should be translated into an IPv4 Echo Request.
#
def test_map_t_echo_request_ip6_to_ip4(self):
""" MAP-T echo request IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_cpe_address,
dst=self.ipv6_map_address)
icmp = ICMPv6EchoRequest()
icmp.id = self.ipv6_udp_or_tcp_map_port
payload = "H" * 10
tx_pkt = eth / ip / icmp / payload
self.pg_send(self.pg1, tx_pkt * 1)
rx_pkts = self.pg0.get_capture(1)
rx_pkt = rx_pkts[0]
self.assertEqual(rx_pkt[IP].proto, IP(proto="icmp").proto)
self.assertEqual(rx_pkt[ICMP].type, ICMP(type="echo-request").type)
self.assertEqual(rx_pkt[ICMP].code, 0)
self.assertEqual(rx_pkt[ICMP].id, self.ipv6_udp_or_tcp_map_port)
#
# Translation of ICMP Echo Reply v6 -> v4 direction
# Received packet should be translated into an IPv4 Echo Reply.
#
def test_map_t_echo_reply_ip6_to_ip4(self):
""" MAP-T echo reply IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_cpe_address,
dst=self.ipv6_map_address)
icmp = ICMPv6EchoReply(id=self.ipv6_udp_or_tcp_map_port)
payload = "H" * 10
tx_pkt = eth / ip / icmp / payload
self.pg_send(self.pg1, tx_pkt * 1)
rx_pkts = self.pg0.get_capture(1)
rx_pkt = rx_pkts[0]
self.assertEqual(rx_pkt[IP].proto, IP(proto="icmp").proto)
self.assertEqual(rx_pkt[ICMP].type, ICMP(type="echo-reply").type)
self.assertEqual(rx_pkt[ICMP].code, 0)
self.assertEqual(rx_pkt[ICMP].id, self.ipv6_udp_or_tcp_map_port)
#
# Spoofed IPv4 Source Address v6 -> v4 direction
# Send a packet with a wrong IPv4 address embedded in bits 72-103.
# The BR should either drop the packet, or rewrite the spoofed
# source IPv4 as the actual source IPv4 address.
# The BR really should drop the packet.
#
def test_map_t_spoof_ipv4_src_addr_ip6_to_ip4(self):
""" MAP-T spoof ipv4 src addr IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_spoof_address,
dst=self.ipv6_map_address)
udp = UDP(sport=self.ipv6_udp_or_tcp_map_port,
dport=self.ipv6_udp_or_tcp_internet_port)
payload = "a" * 82
tx_pkt = eth / ip / udp / payload
self.pg_send(self.pg1, tx_pkt * 1)
self.pg0.get_capture(0, timeout=1)
self.pg0.assert_nothing_captured("Should drop IPv4 spoof address")
#
# Spoofed IPv4 Source Prefix v6 -> v4 direction
# Send a packet with a wrong IPv4 prefix embedded in bits 72-103.
# The BR should either drop the packet, or rewrite the source IPv4
# to the prefix that matches the source IPv4 address.
#
def test_map_t_spoof_ipv4_src_prefix_ip6_to_ip4(self):
""" MAP-T spoof ipv4 src prefix IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_spoof_prefix,
dst=self.ipv6_map_address)
udp = UDP(sport=self.ipv6_udp_or_tcp_map_port,
dport=self.ipv6_udp_or_tcp_internet_port)
payload = "a" * 82
tx_pkt = eth / ip / udp / payload
self.pg_send(self.pg1, tx_pkt * 1)
self.pg0.get_capture(0, timeout=1)
self.pg0.assert_nothing_captured("Should drop IPv4 spoof prefix")
#
# Spoofed IPv6 PSID v6 -> v4 direction
# Send a packet with a wrong IPv6 port PSID
# The BR should drop the packet.
#
def test_map_t_spoof_psid_ip6_to_ip4(self):
""" MAP-T spoof psid IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_spoof_psid,
dst=self.ipv6_map_address)
udp = UDP(sport=self.ipv6_udp_or_tcp_map_port,
dport=self.ipv6_udp_or_tcp_internet_port)
payload = "a" * 82
tx_pkt = eth / ip / udp / payload
self.pg_send(self.pg1, tx_pkt * 1)
self.pg0.get_capture(0, timeout=1)
self.pg0.assert_nothing_captured("Should drop IPv6 spoof PSID")
#
# Spoofed IPv6 subnet field v6 -> v4 direction
# Send a packet with a wrong IPv6 subnet as "2001:db8:f1"
# The BR should drop the packet.
#
def test_map_t_spoof_subnet_ip6_to_ip4(self):
""" MAP-T spoof subnet IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_spoof_subnet,
dst=self.ipv6_map_address)
udp = UDP(sport=self.ipv6_udp_or_tcp_map_port,
dport=self.ipv6_udp_or_tcp_internet_port)
payload = "a" * 82
tx_pkt = eth / ip / udp / payload
self.pg_send(self.pg1, tx_pkt * 1)
self.pg0.get_capture(0, timeout=1)
self.pg0.assert_nothing_captured("Should drop IPv6 spoof subnet")
#
# Spoofed IPv6 port PSID v6 -> v4 direction
# Send a packet with a wrong IPv6 port PSID
# The BR should drop the packet.
#
def test_map_t_spoof_port_psid_ip6_to_ip4(self):
""" MAP-T spoof port psid IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_cpe_address,
dst=self.ipv6_map_address)
udp = UDP(sport=self.ipv6_udp_or_tcp_spoof_port,
dport=self.ipv6_udp_or_tcp_internet_port)
payload = "a" * 82
tx_pkt = eth / ip / udp / payload
self.pg_send(self.pg1, tx_pkt * 1)
self.pg0.get_capture(0, timeout=1)
self.pg0.assert_nothing_captured("Should drop IPv6 spoof port PSID")
#
# Spoofed IPv6 ICMP ID PSID v6 -> v4 direction
# Send a packet with a wrong IPv6 IMCP ID PSID
# The BR should drop the packet.
#
def test_map_t_spoof_icmp_id_psid_ip6_to_ip4(self):
""" MAP-T spoof ICMP id psid IPv6 -> IPv4 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_cpe_address,
dst=self.ipv6_map_address)
icmp = ICMPv6EchoRequest()
icmp.id = self.ipv6_udp_or_tcp_spoof_port
payload = "H" * 10
tx_pkt = eth / ip / icmp / payload
self.pg_send(self.pg1, tx_pkt * 1)
self.pg0.get_capture(0, timeout=1)
self.pg0.assert_nothing_captured("Should drop IPv6 spoof port PSID")
#
# Map to Map - same rule, different address
#
@unittest.skip("Fixme: correct behavior needs clarification")
def test_map_t_same_rule_diff_addr_ip6_to_ip4(self):
""" MAP-T same rule, diff addr IPv6 -> IPv6 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_cpe_address,
dst=self.ipv6_map_same_rule_diff_addr)
udp = UDP(sport=self.ipv6_udp_or_tcp_map_port,
dport=1025)
payload = "a" * 82
tx_pkt = eth / ip / udp / payload
self.pg_send(self.pg1, tx_pkt * 1)
rx_pkts = self.pg1.get_capture(1)
rx_pkt = rx_pkts[0]
#
# Map to Map - same rule, same address
#
@unittest.skip("Fixme: correct behavior needs clarification")
def test_map_t_same_rule_same_addr_ip6_to_ip4(self):
""" MAP-T same rule, same addr IPv6 -> IPv6 """
eth = Ether(src=self.pg1.remote_mac,
dst=self.pg1.local_mac)
ip = IPv6(src=self.ipv6_cpe_address,
dst=self.ipv6_map_same_rule_same_addr)
udp = UDP(sport=self.ipv6_udp_or_tcp_map_port,
dport=1025)
payload = "a" * 82
tx_pkt = eth / ip / udp / payload
self.pg_send(self.pg1, tx_pkt * 1)
rx_pkts = self.pg1.get_capture(1)
rx_pkt = rx_pkts[0]
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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