| #!/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.pg0.local_mac, src=self.pg0.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=254, 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=254, 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) |