+ 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()
+
Code Review / vpp.git / commitdiff