#!/usr/bin/env python3 import ipaddress import unittest from framework import VppTestCase from asfframework import 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, ICMPv6EchoRequest, ICMPv6DestUnreach, ) class TestMAP(VppTestCase): """MAP Test Case""" @classmethod def setUpClass(cls): super(TestMAP, cls).setUpClass() @classmethod def tearDownClass(cls): super(TestMAP, cls).tearDownClass() def setUp(self): super(TestMAP, self).setUp() # create 2 pg interfaces self.create_pg_interfaces(range(4)) # pg0 is 'inside' IPv4 self.pg0.admin_up() self.pg0.config_ip4() self.pg0.resolve_arp() self.pg0.generate_remote_hosts(2) self.pg0.configure_ipv4_neighbors() # pg1 is 'outside' IPv6 self.pg1.admin_up() self.pg1.config_ip6() self.pg1.generate_remote_hosts(4) self.pg1.configure_ipv6_neighbors() def tearDown(self): super(TestMAP, self).tearDown() for i in self.pg_interfaces: for t in (0, 1): self.vapi.map_if_enable_disable( is_enable=0, sw_if_index=i.sw_if_index, is_translation=t ) i.unconfig_ip4() i.unconfig_ip6() i.admin_down() def send_and_assert_encapped(self, packets, ip6_src, ip6_dst, dmac=None): if not dmac: dmac = self.pg1.remote_mac self.pg0.add_stream(packets) self.pg_enable_capture(self.pg_interfaces) self.pg_start() capture = self.pg1.get_capture(len(packets)) for rx, tx in zip(capture, packets): self.assertEqual(rx[Ether].dst, dmac) self.assertEqual(rx[IP].src, tx[IP].src) self.assertEqual(rx[IPv6].src, ip6_src) self.assertEqual(rx[IPv6].dst, ip6_dst) def send_and_assert_encapped_one(self, packet, ip6_src, ip6_dst, dmac=None): return self.send_and_assert_encapped([packet], ip6_src, ip6_dst, dmac) def test_api_map_domain_dump(self): map_dst = "2001::/64" map_src = "3000::1/128" client_pfx = "192.168.0.0/16" tag = "MAP-E tag." index = self.vapi.map_add_domain( ip4_prefix=client_pfx, ip6_prefix=map_dst, ip6_src=map_src, tag=tag ).index rv = self.vapi.map_domain_dump() # restore the state early so as to not impact subsequent tests. # If an assert fails, we will not get the chance to do it at the end. self.vapi.map_del_domain(index=index) self.assertGreater(len(rv), 0, "Expected output from 'map_domain_dump'") # typedefs are returned as ipaddress objects. # wrap results in str() ugh! to avoid the need to call unicode. self.assertEqual(str(rv[0].ip4_prefix), client_pfx) self.assertEqual(str(rv[0].ip6_prefix), map_dst) self.assertEqual(str(rv[0].ip6_src), map_src) self.assertEqual(rv[0].tag, tag, "output produced incorrect tag value.") def create_domains(self, ip4_pfx_str, ip6_pfx_str, ip6_src_str): ip4_pfx = ipaddress.ip_network(ip4_pfx_str) ip6_dst = ipaddress.ip_network(ip6_pfx_str) mod = ip4_pfx.num_addresses / 1024 indicies = [] for i in range(ip4_pfx.num_addresses): rv = self.vapi.map_add_domain( ip6_prefix=ip6_pfx_str, ip4_prefix=str(ip4_pfx[i]) + "/32", ip6_src=ip6_src_str, ) indicies.append(rv.index) return indicies def test_api_map_domains_get(self): # Create a bunch of domains no_domains = 4096 # This must be large enough to ensure VPP suspends domains = self.create_domains("130.67.0.0/20", "2001::/32", "2001::1/128") self.assertEqual(len(domains), no_domains) d = [] cursor = 0 # Invalid cursor rv, details = self.vapi.map_domains_get(cursor=no_domains + 10) self.assertEqual(rv.retval, -7) # Delete a domain in the middle of walk rv, details = self.vapi.map_domains_get(cursor=0) self.assertEqual(rv.retval, -165) self.vapi.map_del_domain(index=rv.cursor) domains.remove(rv.cursor) # Continue at point of deleted cursor rv, details = self.vapi.map_domains_get(cursor=rv.cursor) self.assertIn(rv.retval, [0, -165]) d = list(self.vapi.vpp.details_iter(self.vapi.map_domains_get)) self.assertEqual(len(d), no_domains - 1) # Clean up for i in domains: self.vapi.map_del_domain(index=i) def test_map_e_udp(self): """MAP-E UDP""" # # Add a route to the MAP-BR # map_br_pfx = "2001::" map_br_pfx_len = 32 map_route = VppIpRoute( self, map_br_pfx, map_br_pfx_len, [VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index)], ) map_route.add_vpp_config() # # Add a domain that maps from pg0 to pg1 # map_dst = "2001::/32" map_src = "3000::1/128" client_pfx = "192.168.0.0/16" map_translated_addr = "2001:0:101:7000:0:c0a8:101:7" tag = "MAP-E tag." self.vapi.map_add_domain( ip4_prefix=client_pfx, ip6_prefix=map_dst, ip6_src=map_src, ea_bits_len=20, psid_offset=4, psid_length=4, tag=tag, ) self.vapi.map_param_set_security_check(enable=1, fragments=1) # Enable MAP on interface. self.vapi.map_if_enable_disable( is_enable=1, sw_if_index=self.pg0.sw_if_index, is_translation=0 ) # Ensure MAP doesn't steal all packets! v4 = ( Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) / UDP(sport=20000, dport=10000) / Raw(b"\xa5" * 100) ) rx = self.send_and_expect(self.pg0, v4 * 4, self.pg0) v4_reply = v4[1] v4_reply.ttl -= 1 for p in rx: self.validate(p[1], v4_reply) # # Fire in a v4 packet that will be encapped to the BR # v4 = ( Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst="192.168.1.1") / UDP(sport=20000, dport=10000) / Raw(b"\xa5" * 100) ) self.send_and_assert_encapped(v4 * 4, "3000::1", map_translated_addr) # # Verify reordered fragments are able to pass as well # v4 = ( Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(id=1, src=self.pg0.remote_ip4, dst="192.168.1.1") / UDP(sport=20000, dport=10000) / Raw(b"\xa5" * 1000) ) frags = fragment_rfc791(v4, 400) frags.reverse() self.send_and_assert_encapped(frags, "3000::1", map_translated_addr) # Enable MAP on interface. self.vapi.map_if_enable_disable( is_enable=1, sw_if_index=self.pg1.sw_if_index, is_translation=0 ) # Ensure MAP doesn't steal all packets v6 = ( Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) / UDP(sport=20000, dport=10000) / Raw(b"\xa5" * 100) ) rx = self.send_and_expect(self.pg1, v6 * 1, self.pg1) v6_reply = v6[1] v6_reply.hlim -= 1 for p in rx: self.validate(p[1], v6_reply) # # Fire in a V6 encapped packet. # expect a decapped packet on the inside ip4 link # p = ( Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IPv6(dst="3000::1", src=map_translated_addr) / IP(dst=self.pg0.remote_ip4, src="192.168.1.1") / UDP(sport=10000, dport=20000) / Raw(b"\xa5" * 100) ) self.pg1.add_stream(p) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg0.get_capture(1) rx = rx[0] self.assertFalse(rx.haslayer(IPv6)) self.assertEqual(rx[IP].src, p[IP].src) self.assertEqual(rx[IP].dst, p[IP].dst) # # Verify encapped reordered fragments pass as well # p = ( IP(id=1, dst=self.pg0.remote_ip4, src="192.168.1.1") / UDP(sport=10000, dport=20000) / Raw(b"\xa5" * 1500) ) frags = fragment_rfc791(p, 400) frags.reverse() stream = ( Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IPv6(dst="3000::1", src=map_translated_addr) / x for x in frags ) self.pg1.add_stream(stream) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg0.get_capture(len(frags)) for r in rx: self.assertFalse(r.haslayer(IPv6)) self.assertEqual(r[IP].src, p[IP].src) self.assertEqual(r[IP].dst, p[IP].dst) # Verify that fragments pass even if ipv6 layer is fragmented stream = (IPv6(dst="3000::1", src=map_translated_addr) / x for x in frags) v6_stream = [ Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / x for i in range(len(frags)) for x in fragment_rfc8200( IPv6(dst="3000::1", src=map_translated_addr) / frags[i], i, 200 ) ] self.pg1.add_stream(v6_stream) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg0.get_capture(len(frags)) for r in rx: self.assertFalse(r.haslayer(IPv6)) self.assertEqual(r[IP].src, p[IP].src) self.assertEqual(r[IP].dst, p[IP].dst) # # Pre-resolve. No API for this!! # self.vapi.ppcli("map params pre-resolve ip6-nh 4001::1") self.send_and_assert_no_replies(self.pg0, v4, "resolved via default route") # # Add a route to 4001::1. Expect the encapped traffic to be # sent via that routes next-hop # pre_res_route = VppIpRoute( self, "4001::1", 128, [VppRoutePath(self.pg1.remote_hosts[2].ip6, self.pg1.sw_if_index)], ) pre_res_route.add_vpp_config() self.send_and_assert_encapped_one( v4, "3000::1", map_translated_addr, dmac=self.pg1.remote_hosts[2].mac ) # # change the route to the pre-solved next-hop # pre_res_route.modify( [VppRoutePath(self.pg1.remote_hosts[3].ip6, self.pg1.sw_if_index)] ) pre_res_route.add_vpp_config() self.send_and_assert_encapped_one( v4, "3000::1", map_translated_addr, dmac=self.pg1.remote_hosts[3].mac ) # # cleanup. The test infra's object registry will ensure # the route is really gone and thus that the unresolve worked. # pre_res_route.remove_vpp_config() self.vapi.ppcli("map params pre-resolve del ip6-nh 4001::1") def test_map_e_inner_frag(self): """MAP-E Inner fragmentation""" # # Add a route to the MAP-BR # map_br_pfx = "2001::" map_br_pfx_len = 32 map_route = VppIpRoute( self, map_br_pfx, map_br_pfx_len, [VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index)], ) map_route.add_vpp_config() # # Add a domain that maps from pg0 to pg1 # map_dst = "2001::/32" map_src = "3000::1/128" client_pfx = "192.168.0.0/16" map_translated_addr = "2001:0:101:7000:0:c0a8:101:7" tag = "MAP-E tag." self.vapi.map_add_domain( ip4_prefix=client_pfx, ip6_prefix=map_dst, ip6_src=map_src, ea_bits_len=20, psid_offset=4, psid_length=4, mtu=1000, tag=tag, ) # Enable MAP on interface. self.vapi.map_if_enable_disable( is_enable=1, sw_if_index=self.pg0.sw_if_index, is_translation=0 ) # Enable inner fragmentation self.vapi.map_param_set_fragmentation(inner=1) v4 = ( Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst="192.168.1.1") / UDP(sport=20000, dport=10000) / Raw(b"\xa5" * 1300) ) self.pg_send(self.pg0, v4 * 1) rx = self.pg1.get_capture(2) # 1000-sizeof(ip6_header_t) = 960. frags = fragment_rfc791(v4[1], 960) frags[0].id = 0 frags[1].id = 0 frags[0].ttl -= 1 frags[1].ttl -= 1 frags[0].chksum = 0 frags[1].chksum = 0 v6_reply1 = IPv6(src="3000::1", dst=map_translated_addr, hlim=63) / frags[0] v6_reply2 = IPv6(src="3000::1", dst=map_translated_addr, hlim=63) / frags[1] rx[0][1].fl = 0 rx[1][1].fl = 0 rx[0][1][IP].id = 0 rx[1][1][IP].id = 0 rx[0][1][IP].chksum = 0 rx[1][1][IP].chksum = 0 self.validate(rx[0][1], v6_reply1) self.validate(rx[1][1], v6_reply2) def test_map_e_tcp_mss(self): """MAP-E TCP MSS""" # # Add a route to the MAP-BR # map_br_pfx = "2001::" map_br_pfx_len = 32 map_route = VppIpRoute( self, map_br_pfx, map_br_pfx_len, [VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index)], ) map_route.add_vpp_config() # # Add a domain that maps from pg0 to pg1 # map_dst = "2001::/32" map_src = "3000::1/128" client_pfx = "192.168.0.0/16" map_translated_addr = "2001:0:101:5000:0:c0a8:101:5" tag = "MAP-E TCP tag." self.vapi.map_add_domain( ip4_prefix=client_pfx, ip6_prefix=map_dst, ip6_src=map_src, ea_bits_len=20, psid_offset=4, psid_length=4, tag=tag, ) # Enable MAP on pg0 interface. self.vapi.map_if_enable_disable( is_enable=1, sw_if_index=self.pg0.sw_if_index, is_translation=0 ) # Enable MAP on pg1 interface. self.vapi.map_if_enable_disable( is_enable=1, sw_if_index=self.pg1.sw_if_index, is_translation=0 ) # TCP MSS clamping mss_clamp = 1300 self.vapi.map_param_set_tcp(mss_clamp) # # Send a v4 packet that will be encapped. # p_ether = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) p_ip4 = IP(src=self.pg0.remote_ip4, dst="192.168.1.1") p_tcp = TCP(sport=20000, dport=30000, flags="S", options=[("MSS", 1455)]) p4 = p_ether / p_ip4 / p_tcp self.pg1.add_stream(p4) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = self.pg1.get_capture(1) rx = rx[0] self.assertTrue(rx.haslayer(IPv6)) self.assertEqual(rx[IP].src, p4[IP].src) self.assertEqual(rx[IP].dst, p4[IP].dst) self.assertEqual(rx[IPv6].src, "3000::1") self.assertEqual(rx[TCP].options, TCP(options=[("MSS", mss_clamp)]).options) def validate(self, rx, expected): self.assertEqual(rx, expected.__class__(scapy.compat.raw(expected))) def validate_frag6(self, p6_frag, p_ip6_expected): self.assertFalse(p6_frag.haslayer(IP)) self.assertTrue(p6_frag.haslayer(IPv6)) self.assertTrue(p6_frag.haslayer(IPv6ExtHdrFragment)) self.assertEqual(p6_frag[IPv6].src, p_ip6_expected.src) self.assertEqual(p6_frag[IPv6].dst, p_ip6_expected.dst) def validate_frag_payload_len6(self, rx, proto, payload_len_expected): payload_total = 0 for p in rx: payload_total += p[IPv6].plen # First fragment has proto payload_total -= len(proto()) # Every fragment has IPv6 fragment header payload_total -= len(IPv6ExtHdrFragment()) * len(rx) self.assertEqual(payload_total, payload_len_expected) def validate_frag4(self, p4_frag, p_ip4_expected): self.assertFalse(p4_frag.haslayer(IPv6)) self.assertTrue(p4_frag.haslayer(IP)) self.assertTrue(p4_frag[IP].frag != 0 or p4_frag[IP].flags.MF) self.assertEqual(p4_frag[IP].src, p_ip4_expected.src) self.assertEqual(p4_frag[IP].dst, p_ip4_expected.dst) def validate_frag_payload_len4(self, rx, proto, payload_len_expected): payload_total = 0 for p in rx: payload_total += len(p[IP].payload) # First fragment has proto payload_total -= len(proto()) self.assertEqual(payload_total, payload_len_expected) def payload(self, len): return "x" * len def test_map_t(self): """MAP-T""" # # Add a domain that maps from pg0 to pg1 # map_dst = "2001:db8::/32" map_src = "1234:5678:90ab:cdef::/64" ip4_pfx = "192.168.0.0/24" tag = "MAP-T Tag." self.vapi.map_add_domain( ip6_prefix=map_dst, ip4_prefix=ip4_pfx, ip6_src=map_src, ea_bits_len=16, psid_offset=6, psid_length=4, mtu=1500, tag=tag, ) # 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 ) # Ensure MAP doesn't steal all packets! v4 = ( Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) / UDP(sport=20000, dport=10000) / Raw(b"\xa5" * 100) ) rx = self.send_and_expect(self.pg0, v4 * 1, self.pg0) v4_reply = v4[1] v4_reply.ttl -= 1 for p in rx: self.validate(p[1], v4_reply) # Ensure MAP doesn't steal all packets v6 = ( Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) / UDP(sport=20000, dport=10000) / Raw(b"\xa5" * 100) ) rx = self.send_and_expect(self.pg1, v6 * 1, self.pg1) v6_reply = v6[1] v6_reply.hlim -= 1 for p in rx: self.validate(p[1], v6_reply) map_route = VppIpRoute( self, "2001:db8::", 32, [ VppRoutePath( self.pg1.remote_ip6, self.pg1.sw_if_index, proto=DpoProto.DPO_PROTO_IP6, ) ], ) map_route.add_vpp_config() # # Send a v4 packet that will be translated # p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) p_ip4 = IP(src=self.pg0.remote_ip4, dst="192.168.0.1") payload = TCP(sport=0xABCD, dport=0xABCD) p4 = p_ether / p_ip4 / payload p6_translated = ( IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0", dst="2001:db8:1f0::c0a8:1:f") / payload ) p6_translated.hlim -= 1 rx = self.send_and_expect(self.pg0, p4 * 1, self.pg1) for p in rx: self.validate(p[1], p6_translated) # Send back an IPv6 packet that will be "untranslated" p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) p_ip6 = IPv6( src="2001:db8:1f0::c0a8:1:f", dst="1234:5678:90ab:cdef:ac:1001:200:0" ) p6 = p_ether6 / p_ip6 / payload p4_translated = IP(src="192.168.0.1", dst=self.pg0.remote_ip4) / payload p4_translated.id = 0 p4_translated.ttl -= 1 rx = self.send_and_expect(self.pg1, p6 * 1, self.pg0) for p in rx: self.validate(p[1], p4_translated) # IPv4 TTL=0 ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst="192.168.0.1", ttl=0) p4 = p_ether / ip4_ttl_expired / payload icmp4_reply = ( IP(id=0, ttl=255, src=self.pg0.local_ip4, dst=self.pg0.remote_ip4) / ICMP(type="time-exceeded", code="ttl-zero-during-transit") / IP(src=self.pg0.remote_ip4, dst="192.168.0.1", ttl=0) / payload ) rx = self.send_and_expect(self.pg0, p4 * 1, self.pg0) for p in rx: self.validate(p[1], icmp4_reply) # IPv4 TTL=1 ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst="192.168.0.1", ttl=1) p4 = p_ether / ip4_ttl_expired / payload icmp4_reply = ( IP(id=0, ttl=255, src=self.pg0.local_ip4, dst=self.pg0.remote_ip4) / ICMP(type="time-exceeded", code="ttl-zero-during-transit") / IP(src=self.pg0.remote_ip4, dst="192.168.0.1", ttl=1) / payload ) rx = self.send_and_expect(self.pg0, p4 * 1, self.pg0) for p in rx: self.validate(p[1], icmp4_reply) # IPv6 Hop limit at BR ip6_hlim_expired = IPv6( hlim=1, src="2001:db8:1ab::c0a8:1:ab", dst="1234:5678:90ab:cdef:ac:1001:200:0", ) p6 = p_ether6 / ip6_hlim_expired / payload icmp6_reply = ( IPv6(hlim=255, src=self.pg1.local_ip6, dst="2001:db8:1ab::c0a8:1:ab") / ICMPv6TimeExceeded(code=0) / IPv6( src="2001:db8:1ab::c0a8:1:ab", dst="1234:5678:90ab:cdef:ac:1001:200:0", hlim=1, ) / payload ) rx = self.send_and_expect(self.pg1, p6 * 1, self.pg1) for p in rx: self.validate(p[1], icmp6_reply) # IPv6 Hop limit beyond BR ip6_hlim_expired = IPv6( hlim=0, src="2001:db8:1ab::c0a8:1:ab", dst="1234:5678:90ab:cdef:ac:1001:200:0", ) p6 = p_ether6 / ip6_hlim_expired / payload icmp6_reply = ( IPv6(hlim=255, src=self.pg1.local_ip6, dst="2001:db8:1ab::c0a8:1:ab") / ICMPv6TimeExceeded(code=0) / IPv6( src="2001:db8:1ab::c0a8:1:ab", dst="1234:5678:90ab:cdef:ac:1001:200:0", hlim=0, ) / payload ) rx = self.send_and_expect(self.pg1, p6 * 1, self.pg1) for p in rx: self.validate(p[1], icmp6_reply) # IPv4 Well-known port p_ip4 = IP(src=self.pg0.remote_ip4, dst="192.168.0.1") payload = UDP(sport=200, dport=200) p4 = p_ether / p_ip4 / payload self.send_and_assert_no_replies(self.pg0, p4 * 1) # IPv6 Well-known port payload = UDP(sport=200, dport=200) p6 = p_ether6 / p_ip6 / payload self.send_and_assert_no_replies(self.pg1, p6 * 1) # UDP packet fragmentation payload_len = 1453 payload = UDP(sport=40000, dport=4000) / self.payload(payload_len) p4 = p_ether / p_ip4 / payload self.pg_enable_capture() self.pg0.add_stream(p4) self.pg_start() rx = self.pg1.get_capture(2) p_ip6_translated = IPv6( src="1234:5678:90ab:cdef:ac:1001:200:0", dst="2001:db8:1e0::c0a8:1:e" ) for p in rx: self.validate_frag6(p, p_ip6_translated) self.validate_frag_payload_len6(rx, UDP, payload_len) # UDP packet fragmentation send fragments payload_len = 1453 payload = UDP(sport=40000, dport=4000) / self.payload(payload_len) p4 = p_ether / p_ip4 / payload frags = fragment_rfc791(p4, fragsize=1000) self.pg_enable_capture() self.pg0.add_stream(frags) self.pg_start() rx = self.pg1.get_capture(2) for p in rx: self.validate_frag6(p, p_ip6_translated) self.validate_frag_payload_len6(rx, UDP, payload_len) # Send back an fragmented IPv6 UDP packet that will be "untranslated" payload = UDP(sport=4000, dport=40000) / self.payload(payload_len) p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) p_ip6 = IPv6( src="2001:db8:1e0::c0a8:1:e", dst="1234:5678:90ab:cdef:ac:1001:200:0" ) p6 = p_ether6 / p_ip6 / payload frags6 = fragment_rfc8200(p6, identification=0xDCBA, fragsize=1000) p_ip4_translated = IP(src="192.168.0.1", dst=self.pg0.remote_ip4) p4_translated = p_ip4_translated / payload p4_translated.id = 0 p4_translated.ttl -= 1 self.pg_enable_capture() self.pg1.add_stream(frags6) self.pg_start() rx = self.pg0.get_capture(2) for p in rx: self.validate_frag4(p, p4_translated) self.validate_frag_payload_len4(rx, UDP, payload_len) # ICMP packet fragmentation payload = ICMP(id=6529) / self.payload(payload_len) p4 = p_ether / p_ip4 / payload self.pg_enable_capture() self.pg0.add_stream(p4) self.pg_start() rx = self.pg1.get_capture(2) p_ip6_translated = IPv6( src="1234:5678:90ab:cdef:ac:1001:200:0", dst="2001:db8:160::c0a8:1:6" ) for p in rx: self.validate_frag6(p, p_ip6_translated) self.validate_frag_payload_len6(rx, ICMPv6EchoRequest, payload_len) # ICMP packet fragmentation send fragments payload = ICMP(id=6529) / self.payload(payload_len) p4 = p_ether / p_ip4 / payload frags = fragment_rfc791(p4, fragsize=1000) self.pg_enable_capture() self.pg0.add_stream(frags) self.pg_start() rx = self.pg1.get_capture(2) for p in rx: self.validate_frag6(p, p_ip6_translated) self.validate_frag_payload_len6(rx, ICMPv6EchoRequest, payload_len) # TCP MSS clamping self.vapi.map_param_set_tcp(1300) # # Send a v4 TCP SYN packet that will be translated and MSS clamped # p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) p_ip4 = IP(src=self.pg0.remote_ip4, dst="192.168.0.1") payload = TCP(sport=0xABCD, dport=0xABCD, flags="S", options=[("MSS", 1460)]) p4 = p_ether / p_ip4 / payload p6_translated = ( IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0", dst="2001:db8:1f0::c0a8:1:f") / payload ) p6_translated.hlim -= 1 p6_translated[TCP].options = [("MSS", 1300)] rx = self.send_and_expect(self.pg0, p4 * 1, self.pg1) for p in rx: self.validate(p[1], p6_translated) # Send back an IPv6 packet that will be "untranslated" p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) p_ip6 = IPv6( src="2001:db8:1f0::c0a8:1:f", dst="1234:5678:90ab:cdef:ac:1001:200:0" ) p6 = p_ether6 / p_ip6 / payload p4_translated = IP(src="192.168.0.1", dst=self.pg0.remote_ip4) / payload p4_translated.id = 0 p4_translated.ttl -= 1 p4_translated[TCP].options = [("MSS", 1300)] rx = self.send_and_expect(self.pg1, p6 * 1, self.pg0) for p in rx: self.validate(p[1], p4_translated) # TCP MSS clamping cleanup self.vapi.map_param_set_tcp(0) # Enable icmp6 param to get back ICMPv6 unreachable messages in case # of security check fails self.vapi.map_param_set_icmp6(enable_unreachable=1) # Send back an IPv6 packet that will be droppped due to security # check fail p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) p_ip6_sec_check_fail = IPv6( src="2001:db8:1fe::c0a8:1:f", dst="1234:5678:90ab:cdef:ac:1001:200:0" ) payload = TCP(sport=0xABCD, dport=0xABCD) p6 = p_ether6 / p_ip6_sec_check_fail / payload self.pg_send(self.pg1, p6 * 1) self.pg0.get_capture(0, timeout=1) rx = self.pg1.get_capture(1) icmp6_reply = ( IPv6(hlim=255, src=self.pg1.local_ip6, dst="2001:db8:1fe::c0a8:1:f") / ICMPv6DestUnreach(code=5) / p_ip6_sec_check_fail / payload ) for p in rx: self.validate(p[1], icmp6_reply) # ICMPv6 unreachable messages cleanup self.vapi.map_param_set_icmp6(enable_unreachable=0) def test_map_t_ip6_psid(self): """MAP-T v6->v4 PSID validation""" # # Add a domain that maps from pg0 to pg1 # map_dst = "2001:db8::/32" map_src = "1234:5678:90ab:cdef::/64" ip4_pfx = "192.168.0.0/24" tag = "MAP-T Test Domain" self.vapi.map_add_domain( ip6_prefix=map_dst, ip4_prefix=ip4_pfx, ip6_src=map_src, ea_bits_len=16, psid_offset=6, psid_length=4, mtu=1500, tag=tag, ) # 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 ) map_route = VppIpRoute( self, "2001:db8::", 32, [ VppRoutePath( self.pg1.remote_ip6, self.pg1.sw_if_index, proto=DpoProto.DPO_PROTO_IP6, ) ], ) map_route.add_vpp_config() p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) p_ip6 = IPv6( src="2001:db8:1f0::c0a8:1:f", dst="1234:5678:90ab:cdef:ac:1001:200:0" ) # Send good IPv6 source port, ensure translated IPv4 received payload = TCP(sport=0xABCD, dport=80) p6 = p_ether6 / p_ip6 / payload p4_translated = IP(src="192.168.0.1", dst=self.pg0.remote_ip4) / payload p4_translated.id = 0 p4_translated.ttl -= 1 rx = self.send_and_expect(self.pg1, p6 * 1, self.pg0) for p in rx: self.validate(p[1], p4_translated) # Send bad IPv6 source port, ensure translated IPv4 not received payload = TCP(sport=0xDCBA, dport=80) p6 = p_ether6 / p_ip6 / payload self.send_and_assert_no_replies(self.pg1, p6 * 1) def test_map_t_pre_resolve(self): """MAP-T pre-resolve""" # Add a domain that maps from pg0 to pg1 map_dst = "2001:db8::/32" map_src = "1234:5678:90ab:cdef::/64" ip4_pfx = "192.168.0.0/24" tag = "MAP-T Test Domain." self.vapi.map_add_domain( ip6_prefix=map_dst, ip4_prefix=ip4_pfx, ip6_src=map_src, ea_bits_len=16, psid_offset=6, psid_length=4, mtu=1500, tag=tag, ) # 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 ) # Enable pre-resolve option self.vapi.map_param_add_del_pre_resolve( ip4_nh_address="10.1.2.3", ip6_nh_address="4001::1", is_add=1 ) # Add a route to 4001::1 and expect the translated traffic to be # sent via that route next-hop. pre_res_route6 = VppIpRoute( self, "4001::1", 128, [VppRoutePath(self.pg1.remote_hosts[2].ip6, self.pg1.sw_if_index)], ) pre_res_route6.add_vpp_config() # Add a route to 10.1.2.3 and expect the "untranslated" traffic to be # sent via that route next-hop. pre_res_route4 = VppIpRoute( self, "10.1.2.3", 32, [VppRoutePath(self.pg0.remote_hosts[1].ip4, self.pg0.sw_if_index)], ) pre_res_route4.add_vpp_config() # Send an IPv4 packet that will be translated p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) p_ip4 = IP(src=self.pg0.remote_ip4, dst="192.168.0.1") payload = TCP(sport=0xABCD, dport=0xABCD) p4 = p_ether / p_ip4 / payload p6_translated = ( IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0", dst="2001:db8:1f0::c0a8:1:f") / payload ) p6_translated.hlim -= 1 rx = self.send_and_expect(self.pg0, p4 * 1, self.pg1) for p in rx: self.assertEqual(p[Ether].dst, self.pg1.remote_hosts[2].mac) self.validate(p[1], p6_translated) # Send back an IPv6 packet that will be "untranslated" p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) p_ip6 = IPv6( src="2001:db8:1f0::c0a8:1:f", dst="1234:5678:90ab:cdef:ac:1001:200:0" ) p6 = p_ether6 / p_ip6 / payload p4_translated = IP(src="192.168.0.1", dst=self.pg0.remote_ip4) / payload p4_translated.id = 0 p4_translated.ttl -= 1 rx = self.send_and_expect(self.pg1, p6 * 1, self.pg0) for p in rx: self.assertEqual(p[Ether].dst, self.pg0.remote_hosts[1].mac) self.validate(p[1], p4_translated) # Cleanup pre-resolve option self.vapi.map_param_add_del_pre_resolve( ip4_nh_address="10.1.2.3", ip6_nh_address="4001::1", is_add=0 ) if __name__ == "__main__": unittest.main(testRunner=VppTestRunner)