diff options
Diffstat (limited to 'test/test_wireguard.py')
| -rw-r--r-- | test/test_wireguard.py | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/test/test_wireguard.py b/test/test_wireguard.py index b9713f6fc08..e63508af459 100644 --- a/test/test_wireguard.py +++ b/test/test_wireguard.py @@ -11,6 +11,7 @@ from scapy.packet import Raw from scapy.layers.l2 import Ether, ARP from scapy.layers.inet import IP, UDP from scapy.layers.inet6 import IPv6 +from scapy.layers.vxlan import VXLAN from scapy.contrib.wireguard import ( Wireguard, WireguardResponse, @@ -40,6 +41,8 @@ from vpp_ipip_tun_interface import VppIpIpTunInterface from vpp_interface import VppInterface from vpp_pg_interface import is_ipv6_misc from vpp_ip_route import VppIpRoute, VppRoutePath +from vpp_l2 import VppBridgeDomain, VppBridgeDomainPort +from vpp_vxlan_tunnel import VppVxlanTunnel from vpp_object import VppObject from vpp_papi import VppEnum from framework import is_distro_ubuntu2204, is_distro_debian11, tag_fixme_vpp_debug @@ -470,6 +473,7 @@ class VppWgPeer(VppObject): return self.noise.encrypt(bytes(p)) def validate_encapped(self, rxs, tx, is_tunnel_ip6=False, is_transport_ip6=False): + ret_rxs = [] for rx in rxs: rx = self.decrypt_transport(rx, is_tunnel_ip6) if is_transport_ip6 is False: @@ -482,6 +486,8 @@ class VppWgPeer(VppObject): # check the original packet is present self._test.assertEqual(rx[IPv6].dst, tx[IPv6].dst) self._test.assertEqual(rx[IPv6].hlim, tx[IPv6].hlim - 1) + ret_rxs.append(rx) + return ret_rxs def want_events(self): self._test.vapi.want_wireguard_peer_events( @@ -2510,6 +2516,227 @@ class TestWg(VppTestCase): peer_1.remove_vpp_config() wg0.remove_vpp_config() + def _test_wg_large_packet_tmpl(self, is_async, is_ip6): + self.vapi.wg_set_async_mode(is_async) + port = 12323 + + # create wg interface + if is_ip6: + wg0 = VppWgInterface(self, self.pg1.local_ip6, port).add_vpp_config() + wg0.admin_up() + wg0.config_ip6() + else: + wg0 = VppWgInterface(self, self.pg1.local_ip4, port).add_vpp_config() + wg0.admin_up() + wg0.config_ip4() + + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # create a peer + if is_ip6: + peer_1 = VppWgPeer( + self, wg0, self.pg1.remote_ip6, port + 1, ["1::3:0/112"] + ).add_vpp_config() + else: + peer_1 = VppWgPeer( + self, wg0, self.pg1.remote_ip4, port + 1, ["10.11.3.0/24"] + ).add_vpp_config() + self.assertEqual(len(self.vapi.wireguard_peers_dump()), 1) + + # create a route to rewrite traffic into the wg interface + if is_ip6: + r1 = VppIpRoute( + self, "1::3:0", 112, [VppRoutePath("1::3:1", wg0.sw_if_index)] + ).add_vpp_config() + else: + r1 = VppIpRoute( + self, "10.11.3.0", 24, [VppRoutePath("10.11.3.1", wg0.sw_if_index)] + ).add_vpp_config() + + # wait for the peer to send a handshake initiation + rxs = self.pg1.get_capture(1, timeout=2) + + # prepare and send a handshake response + # expect a keepalive message + resp = peer_1.consume_init(rxs[0], self.pg1, is_ip6=is_ip6) + rxs = self.send_and_expect(self.pg1, [resp], self.pg1) + + # verify the keepalive message + b = peer_1.decrypt_transport(rxs[0], is_ip6=is_ip6) + self.assertEqual(0, len(b)) + + # prepare and send data packets + # expect to receive them decrypted + if is_ip6: + ip_header = IPv6(src="1::3:1", dst=self.pg0.remote_ip6, hlim=20) + else: + ip_header = IP(src="10.11.3.1", dst=self.pg0.remote_ip4, ttl=20) + packet_len_opts = ( + 2500, # two buffers + 1500, # one buffer + 4500, # three buffers + 1910 if is_ip6 else 1950, # auth tag is not contiguous + ) + txs = [] + for l in packet_len_opts: + txs.append( + peer_1.mk_tunnel_header(self.pg1, is_ip6=is_ip6) + / Wireguard(message_type=4, reserved_zero=0) + / WireguardTransport( + receiver_index=peer_1.sender, + counter=len(txs), + encrypted_encapsulated_packet=peer_1.encrypt_transport( + ip_header / UDP(sport=222, dport=223) / Raw(b"\xfe" * l) + ), + ) + ) + rxs = self.send_and_expect(self.pg1, txs, self.pg0) + + # verify decrypted packets + for i, l in enumerate(packet_len_opts): + if is_ip6: + self.assertEqual(rxs[i][IPv6].dst, self.pg0.remote_ip6) + self.assertEqual(rxs[i][IPv6].hlim, ip_header.hlim - 1) + else: + self.assertEqual(rxs[i][IP].dst, self.pg0.remote_ip4) + self.assertEqual(rxs[i][IP].ttl, ip_header.ttl - 1) + self.assertEqual(len(rxs[i][Raw]), l) + self.assertEqual(bytes(rxs[i][Raw]), b"\xfe" * l) + + # prepare and send packets that will be rewritten into the wg interface + # expect data packets sent + if is_ip6: + ip_header = IPv6(src=self.pg0.remote_ip6, dst="1::3:2") + else: + ip_header = IP(src=self.pg0.remote_ip4, dst="10.11.3.2") + packet_len_opts = ( + 2500, # two buffers + 1500, # one buffer + 4500, # three buffers + 1980 if is_ip6 else 2000, # no free space to write auth tag + ) + txs = [] + for l in packet_len_opts: + txs.append( + Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) + / ip_header + / UDP(sport=555, dport=556) + / Raw(b"\xfe" * l) + ) + rxs = self.send_and_expect(self.pg0, txs, self.pg1) + + # verify the data packets + rxs_decrypted = peer_1.validate_encapped( + rxs, ip_header, is_tunnel_ip6=is_ip6, is_transport_ip6=is_ip6 + ) + + for i, l in enumerate(packet_len_opts): + self.assertEqual(len(rxs_decrypted[i][Raw]), l) + self.assertEqual(bytes(rxs_decrypted[i][Raw]), b"\xfe" * l) + + # remove configs + r1.remove_vpp_config() + peer_1.remove_vpp_config() + wg0.remove_vpp_config() + + def test_wg_large_packet_v4_sync(self): + """Large packet (v4, sync)""" + self._test_wg_large_packet_tmpl(is_async=False, is_ip6=False) + + def test_wg_large_packet_v6_sync(self): + """Large packet (v6, sync)""" + self._test_wg_large_packet_tmpl(is_async=False, is_ip6=True) + + def test_wg_large_packet_v4_async(self): + """Large packet (v4, async)""" + self._test_wg_large_packet_tmpl(is_async=True, is_ip6=False) + + def test_wg_large_packet_v6_async(self): + """Large packet (v6, async)""" + self._test_wg_large_packet_tmpl(is_async=True, is_ip6=True) + + def test_wg_lack_of_buf_headroom(self): + """Lack of buffer's headroom (v6 vxlan over v6 wg)""" + port = 12323 + + # create wg interface + wg0 = VppWgInterface(self, self.pg1.local_ip6, port).add_vpp_config() + wg0.admin_up() + wg0.config_ip6() + + self.pg_enable_capture(self.pg_interfaces) + self.pg_start() + + # create a peer + peer_1 = VppWgPeer( + self, wg0, self.pg1.remote_ip6, port + 1, ["::/0"] + ).add_vpp_config() + self.assertEqual(len(self.vapi.wireguard_peers_dump()), 1) + + # create a route to enable communication between wg interface addresses + r1 = VppIpRoute( + self, wg0.remote_ip6, 128, [VppRoutePath("0.0.0.0", wg0.sw_if_index)] + ).add_vpp_config() + + # wait for the peer to send a handshake initiation + rxs = self.pg1.get_capture(1, timeout=2) + + # prepare and send a handshake response + # expect a keepalive message + resp = peer_1.consume_init(rxs[0], self.pg1, is_ip6=True) + rxs = self.send_and_expect(self.pg1, [resp], self.pg1) + + # verify the keepalive message + b = peer_1.decrypt_transport(rxs[0], is_ip6=True) + self.assertEqual(0, len(b)) + + # create vxlan interface over the wg interface + vxlan0 = VppVxlanTunnel(self, src=wg0.local_ip6, dst=wg0.remote_ip6, vni=1111) + vxlan0.add_vpp_config() + + # create bridge domain + bd1 = VppBridgeDomain(self, bd_id=1) + bd1.add_vpp_config() + + # add the vxlan interface and pg0 to the bridge domain + bd1_ports = ( + VppBridgeDomainPort(self, bd1, vxlan0).add_vpp_config(), + VppBridgeDomainPort(self, bd1, self.pg0).add_vpp_config(), + ) + + # prepare and send packets that will be rewritten into the vxlan interface + # expect they to be rewritten into the wg interface then and data packets sent + tx = ( + Ether(dst="00:00:00:00:00:01", src="00:00:00:00:00:02") + / IPv6(src="::1", dst="::2", hlim=20) + / UDP(sport=1111, dport=1112) + / Raw(b"\xfe" * 1900) + ) + rxs = self.send_and_expect(self.pg0, [tx] * 5, self.pg1) + + # verify the data packet + for rx in rxs: + rx_decrypted = IPv6(peer_1.decrypt_transport(rx, is_ip6=True)) + + self.assertEqual(rx_decrypted[VXLAN].vni, vxlan0.vni) + inner = rx_decrypted[VXLAN].payload + + # check the original packet is present + self.assertEqual(inner[IPv6].dst, tx[IPv6].dst) + self.assertEqual(inner[IPv6].hlim, tx[IPv6].hlim) + self.assertEqual(len(inner[Raw]), len(tx[Raw])) + self.assertEqual(bytes(inner[Raw]), bytes(tx[Raw])) + + # remove configs + for bdp in bd1_ports: + bdp.remove_vpp_config() + bd1.remove_vpp_config() + vxlan0.remove_vpp_config() + r1.remove_vpp_config() + peer_1.remove_vpp_config() + wg0.remove_vpp_config() + @tag_fixme_vpp_debug class WireguardHandoffTests(TestWg): |