Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | |
| 3 | import unittest |
| 4 | from socket import AF_INET, AF_INET6, inet_pton |
| 5 | |
| 6 | from framework import VppTestCase, VppTestRunner |
| 7 | from vpp_neighbor import VppNeighbor, find_nbr |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 8 | from vpp_ip_route import VppIpRoute, VppRoutePath, find_route, \ |
| 9 | VppIpTable |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 10 | |
| 11 | from scapy.packet import Raw |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 12 | from scapy.layers.l2 import Ether, ARP, Dot1Q |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 13 | from scapy.layers.inet import IP, UDP |
Neale Ranns | 37be736 | 2017-02-21 17:30:26 -0800 | [diff] [blame] | 14 | from scapy.contrib.mpls import MPLS |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 15 | |
| 16 | # not exported by scapy, so redefined here |
| 17 | arp_opts = {"who-has": 1, "is-at": 2} |
| 18 | |
| 19 | |
| 20 | class ARPTestCase(VppTestCase): |
| 21 | """ ARP Test Case """ |
| 22 | |
| 23 | def setUp(self): |
| 24 | super(ARPTestCase, self).setUp() |
| 25 | |
| 26 | # create 3 pg interfaces |
| 27 | self.create_pg_interfaces(range(4)) |
| 28 | |
| 29 | # pg0 configured with ip4 and 6 addresses used for input |
| 30 | # pg1 configured with ip4 and 6 addresses used for output |
| 31 | # pg2 is unnumbered to pg0 |
| 32 | for i in self.pg_interfaces: |
| 33 | i.admin_up() |
| 34 | |
| 35 | self.pg0.config_ip4() |
| 36 | self.pg0.config_ip6() |
| 37 | self.pg0.resolve_arp() |
| 38 | |
| 39 | self.pg1.config_ip4() |
| 40 | self.pg1.config_ip6() |
| 41 | |
| 42 | # pg3 in a different VRF |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 43 | self.tbl = VppIpTable(self, 1) |
| 44 | self.tbl.add_vpp_config() |
| 45 | |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 46 | self.pg3.set_table_ip4(1) |
| 47 | self.pg3.config_ip4() |
| 48 | |
Neale Ranns | 4008ac9 | 2017-02-13 23:20:04 -0800 | [diff] [blame] | 49 | def tearDown(self): |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 50 | self.pg0.unconfig_ip4() |
| 51 | self.pg0.unconfig_ip6() |
| 52 | |
| 53 | self.pg1.unconfig_ip4() |
| 54 | self.pg1.unconfig_ip6() |
| 55 | |
| 56 | self.pg3.unconfig_ip4() |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 57 | self.pg3.set_table_ip4(0) |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 58 | |
Neale Ranns | 4008ac9 | 2017-02-13 23:20:04 -0800 | [diff] [blame] | 59 | for i in self.pg_interfaces: |
Neale Ranns | 4008ac9 | 2017-02-13 23:20:04 -0800 | [diff] [blame] | 60 | i.admin_down() |
| 61 | |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 62 | super(ARPTestCase, self).tearDown() |
| 63 | |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 64 | def verify_arp_req(self, rx, smac, sip, dip): |
| 65 | ether = rx[Ether] |
| 66 | self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff") |
| 67 | self.assertEqual(ether.src, smac) |
| 68 | |
| 69 | arp = rx[ARP] |
| 70 | self.assertEqual(arp.hwtype, 1) |
| 71 | self.assertEqual(arp.ptype, 0x800) |
| 72 | self.assertEqual(arp.hwlen, 6) |
| 73 | self.assertEqual(arp.plen, 4) |
| 74 | self.assertEqual(arp.op, arp_opts["who-has"]) |
| 75 | self.assertEqual(arp.hwsrc, smac) |
| 76 | self.assertEqual(arp.hwdst, "00:00:00:00:00:00") |
| 77 | self.assertEqual(arp.psrc, sip) |
| 78 | self.assertEqual(arp.pdst, dip) |
| 79 | |
| 80 | def verify_arp_resp(self, rx, smac, dmac, sip, dip): |
| 81 | ether = rx[Ether] |
| 82 | self.assertEqual(ether.dst, dmac) |
| 83 | self.assertEqual(ether.src, smac) |
| 84 | |
| 85 | arp = rx[ARP] |
| 86 | self.assertEqual(arp.hwtype, 1) |
| 87 | self.assertEqual(arp.ptype, 0x800) |
| 88 | self.assertEqual(arp.hwlen, 6) |
| 89 | self.assertEqual(arp.plen, 4) |
| 90 | self.assertEqual(arp.op, arp_opts["is-at"]) |
| 91 | self.assertEqual(arp.hwsrc, smac) |
| 92 | self.assertEqual(arp.hwdst, dmac) |
| 93 | self.assertEqual(arp.psrc, sip) |
| 94 | self.assertEqual(arp.pdst, dip) |
| 95 | |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 96 | def verify_arp_vrrp_resp(self, rx, smac, dmac, sip, dip): |
| 97 | ether = rx[Ether] |
| 98 | self.assertEqual(ether.dst, dmac) |
| 99 | self.assertEqual(ether.src, smac) |
| 100 | |
| 101 | arp = rx[ARP] |
| 102 | self.assertEqual(arp.hwtype, 1) |
| 103 | self.assertEqual(arp.ptype, 0x800) |
| 104 | self.assertEqual(arp.hwlen, 6) |
| 105 | self.assertEqual(arp.plen, 4) |
| 106 | self.assertEqual(arp.op, arp_opts["is-at"]) |
| 107 | self.assertNotEqual(arp.hwsrc, smac) |
| 108 | self.assertTrue("00:00:5e:00:01" in arp.hwsrc or |
| 109 | "00:00:5E:00:01" in arp.hwsrc) |
| 110 | self.assertEqual(arp.hwdst, dmac) |
| 111 | self.assertEqual(arp.psrc, sip) |
| 112 | self.assertEqual(arp.pdst, dip) |
| 113 | |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 114 | def verify_ip(self, rx, smac, dmac, sip, dip): |
| 115 | ether = rx[Ether] |
| 116 | self.assertEqual(ether.dst, dmac) |
| 117 | self.assertEqual(ether.src, smac) |
| 118 | |
| 119 | ip = rx[IP] |
| 120 | self.assertEqual(ip.src, sip) |
| 121 | self.assertEqual(ip.dst, dip) |
| 122 | |
Neale Ranns | 37be736 | 2017-02-21 17:30:26 -0800 | [diff] [blame] | 123 | def verify_ip_o_mpls(self, rx, smac, dmac, label, sip, dip): |
| 124 | ether = rx[Ether] |
| 125 | self.assertEqual(ether.dst, dmac) |
| 126 | self.assertEqual(ether.src, smac) |
| 127 | |
| 128 | mpls = rx[MPLS] |
| 129 | self.assertTrue(mpls.label, label) |
| 130 | |
| 131 | ip = rx[IP] |
| 132 | self.assertEqual(ip.src, sip) |
| 133 | self.assertEqual(ip.dst, dip) |
| 134 | |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 135 | def test_arp(self): |
| 136 | """ ARP """ |
| 137 | |
| 138 | # |
| 139 | # Generate some hosts on the LAN |
| 140 | # |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 141 | self.pg1.generate_remote_hosts(11) |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 142 | |
| 143 | # |
| 144 | # Send IP traffic to one of these unresolved hosts. |
| 145 | # expect the generation of an ARP request |
| 146 | # |
| 147 | p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| 148 | IP(src=self.pg0.remote_ip4, dst=self.pg1._remote_hosts[1].ip4) / |
| 149 | UDP(sport=1234, dport=1234) / |
| 150 | Raw()) |
| 151 | |
| 152 | self.pg0.add_stream(p) |
| 153 | self.pg_enable_capture(self.pg_interfaces) |
| 154 | self.pg_start() |
| 155 | |
| 156 | rx = self.pg1.get_capture(1) |
| 157 | |
| 158 | self.verify_arp_req(rx[0], |
| 159 | self.pg1.local_mac, |
| 160 | self.pg1.local_ip4, |
| 161 | self.pg1._remote_hosts[1].ip4) |
| 162 | |
| 163 | # |
| 164 | # And a dynamic ARP entry for host 1 |
| 165 | # |
| 166 | dyn_arp = VppNeighbor(self, |
| 167 | self.pg1.sw_if_index, |
| 168 | self.pg1.remote_hosts[1].mac, |
| 169 | self.pg1.remote_hosts[1].ip4) |
| 170 | dyn_arp.add_vpp_config() |
| 171 | |
| 172 | # |
| 173 | # now we expect IP traffic forwarded |
| 174 | # |
| 175 | dyn_p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| 176 | IP(src=self.pg0.remote_ip4, |
| 177 | dst=self.pg1._remote_hosts[1].ip4) / |
| 178 | UDP(sport=1234, dport=1234) / |
| 179 | Raw()) |
| 180 | |
| 181 | self.pg0.add_stream(dyn_p) |
| 182 | self.pg_enable_capture(self.pg_interfaces) |
| 183 | self.pg_start() |
| 184 | |
| 185 | rx = self.pg1.get_capture(1) |
| 186 | |
| 187 | self.verify_ip(rx[0], |
| 188 | self.pg1.local_mac, |
| 189 | self.pg1.remote_hosts[1].mac, |
| 190 | self.pg0.remote_ip4, |
| 191 | self.pg1._remote_hosts[1].ip4) |
| 192 | |
| 193 | # |
| 194 | # And a Static ARP entry for host 2 |
| 195 | # |
| 196 | static_arp = VppNeighbor(self, |
| 197 | self.pg1.sw_if_index, |
| 198 | self.pg1.remote_hosts[2].mac, |
| 199 | self.pg1.remote_hosts[2].ip4, |
| 200 | is_static=1) |
| 201 | static_arp.add_vpp_config() |
| 202 | |
| 203 | static_p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| 204 | IP(src=self.pg0.remote_ip4, |
| 205 | dst=self.pg1._remote_hosts[2].ip4) / |
| 206 | UDP(sport=1234, dport=1234) / |
| 207 | Raw()) |
| 208 | |
| 209 | self.pg0.add_stream(static_p) |
| 210 | self.pg_enable_capture(self.pg_interfaces) |
| 211 | self.pg_start() |
| 212 | |
| 213 | rx = self.pg1.get_capture(1) |
| 214 | |
| 215 | self.verify_ip(rx[0], |
| 216 | self.pg1.local_mac, |
| 217 | self.pg1.remote_hosts[2].mac, |
| 218 | self.pg0.remote_ip4, |
| 219 | self.pg1._remote_hosts[2].ip4) |
| 220 | |
| 221 | # |
| 222 | # flap the link. dynamic ARPs get flush, statics don't |
| 223 | # |
| 224 | self.pg1.admin_down() |
| 225 | self.pg1.admin_up() |
| 226 | |
| 227 | self.pg0.add_stream(static_p) |
| 228 | self.pg_enable_capture(self.pg_interfaces) |
| 229 | self.pg_start() |
| 230 | rx = self.pg1.get_capture(1) |
| 231 | |
| 232 | self.verify_ip(rx[0], |
| 233 | self.pg1.local_mac, |
| 234 | self.pg1.remote_hosts[2].mac, |
| 235 | self.pg0.remote_ip4, |
| 236 | self.pg1._remote_hosts[2].ip4) |
| 237 | |
| 238 | self.pg0.add_stream(dyn_p) |
| 239 | self.pg_enable_capture(self.pg_interfaces) |
| 240 | self.pg_start() |
| 241 | |
| 242 | rx = self.pg1.get_capture(1) |
| 243 | self.verify_arp_req(rx[0], |
| 244 | self.pg1.local_mac, |
| 245 | self.pg1.local_ip4, |
| 246 | self.pg1._remote_hosts[1].ip4) |
| 247 | |
| 248 | # |
| 249 | # Send an ARP request from one of the so-far unlearned remote hosts |
| 250 | # |
| 251 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", |
| 252 | src=self.pg1._remote_hosts[3].mac) / |
| 253 | ARP(op="who-has", |
| 254 | hwsrc=self.pg1._remote_hosts[3].mac, |
| 255 | pdst=self.pg1.local_ip4, |
| 256 | psrc=self.pg1._remote_hosts[3].ip4)) |
| 257 | |
| 258 | self.pg1.add_stream(p) |
| 259 | self.pg_enable_capture(self.pg_interfaces) |
| 260 | self.pg_start() |
| 261 | |
| 262 | rx = self.pg1.get_capture(1) |
| 263 | self.verify_arp_resp(rx[0], |
| 264 | self.pg1.local_mac, |
| 265 | self.pg1._remote_hosts[3].mac, |
| 266 | self.pg1.local_ip4, |
| 267 | self.pg1._remote_hosts[3].ip4) |
| 268 | |
| 269 | # |
| 270 | # VPP should have learned the mapping for the remote host |
| 271 | # |
| 272 | self.assertTrue(find_nbr(self, |
| 273 | self.pg1.sw_if_index, |
| 274 | self.pg1._remote_hosts[3].ip4)) |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 275 | # |
| 276 | # Fire in an ARP request before the interface becomes IP enabled |
| 277 | # |
| 278 | self.pg2.generate_remote_hosts(4) |
| 279 | |
| 280 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| 281 | ARP(op="who-has", |
| 282 | hwsrc=self.pg2.remote_mac, |
| 283 | pdst=self.pg1.local_ip4, |
| 284 | psrc=self.pg2.remote_hosts[3].ip4)) |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 285 | pt = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| 286 | Dot1Q(vlan=0) / |
| 287 | ARP(op="who-has", |
| 288 | hwsrc=self.pg2.remote_mac, |
| 289 | pdst=self.pg1.local_ip4, |
| 290 | psrc=self.pg2.remote_hosts[3].ip4)) |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 291 | self.send_and_assert_no_replies(self.pg2, p, |
| 292 | "interface not IP enabled") |
| 293 | |
| 294 | # |
| 295 | # Make pg2 un-numbered to pg1 |
| 296 | # |
| 297 | self.pg2.set_unnumbered(self.pg1.sw_if_index) |
| 298 | |
| 299 | # |
| 300 | # We should respond to ARP requests for the unnumbered to address |
| 301 | # once an attached route to the source is known |
| 302 | # |
| 303 | self.send_and_assert_no_replies( |
| 304 | self.pg2, p, |
| 305 | "ARP req for unnumbered address - no source") |
| 306 | |
| 307 | attached_host = VppIpRoute(self, self.pg2.remote_hosts[3].ip4, 32, |
| 308 | [VppRoutePath("0.0.0.0", |
| 309 | self.pg2.sw_if_index)]) |
| 310 | attached_host.add_vpp_config() |
| 311 | |
| 312 | self.pg2.add_stream(p) |
| 313 | self.pg_enable_capture(self.pg_interfaces) |
| 314 | self.pg_start() |
| 315 | |
| 316 | rx = self.pg2.get_capture(1) |
| 317 | self.verify_arp_resp(rx[0], |
| 318 | self.pg2.local_mac, |
| 319 | self.pg2.remote_mac, |
| 320 | self.pg1.local_ip4, |
| 321 | self.pg2.remote_hosts[3].ip4) |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 322 | |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 323 | self.pg2.add_stream(pt) |
| 324 | self.pg_enable_capture(self.pg_interfaces) |
| 325 | self.pg_start() |
| 326 | |
| 327 | rx = self.pg2.get_capture(1) |
| 328 | self.verify_arp_resp(rx[0], |
| 329 | self.pg2.local_mac, |
| 330 | self.pg2.remote_mac, |
| 331 | self.pg1.local_ip4, |
| 332 | self.pg2.remote_hosts[3].ip4) |
| 333 | |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 334 | # |
Neale Ranns | 3983ac2 | 2017-03-10 11:53:27 -0800 | [diff] [blame] | 335 | # A neighbor entry that has no associated FIB-entry |
| 336 | # |
| 337 | arp_no_fib = VppNeighbor(self, |
| 338 | self.pg1.sw_if_index, |
| 339 | self.pg1.remote_hosts[4].mac, |
| 340 | self.pg1.remote_hosts[4].ip4, |
| 341 | is_no_fib_entry=1) |
| 342 | arp_no_fib.add_vpp_config() |
| 343 | |
| 344 | # |
| 345 | # check we have the neighbor, but no route |
| 346 | # |
| 347 | self.assertTrue(find_nbr(self, |
| 348 | self.pg1.sw_if_index, |
| 349 | self.pg1._remote_hosts[4].ip4)) |
| 350 | self.assertFalse(find_route(self, |
| 351 | self.pg1._remote_hosts[4].ip4, |
| 352 | 32)) |
| 353 | # |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 354 | # pg2 is unnumbered to pg1, so we can form adjacencies out of pg2 |
| 355 | # from within pg1's subnet |
Neale Ranns | 3983ac2 | 2017-03-10 11:53:27 -0800 | [diff] [blame] | 356 | # |
| 357 | arp_unnum = VppNeighbor(self, |
| 358 | self.pg2.sw_if_index, |
| 359 | self.pg1.remote_hosts[5].mac, |
| 360 | self.pg1.remote_hosts[5].ip4) |
| 361 | arp_unnum.add_vpp_config() |
| 362 | |
| 363 | p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| 364 | IP(src=self.pg0.remote_ip4, |
| 365 | dst=self.pg1._remote_hosts[5].ip4) / |
| 366 | UDP(sport=1234, dport=1234) / |
| 367 | Raw()) |
| 368 | |
| 369 | self.pg0.add_stream(p) |
| 370 | self.pg_enable_capture(self.pg_interfaces) |
| 371 | self.pg_start() |
| 372 | |
| 373 | rx = self.pg2.get_capture(1) |
| 374 | |
| 375 | self.verify_ip(rx[0], |
| 376 | self.pg2.local_mac, |
| 377 | self.pg1.remote_hosts[5].mac, |
| 378 | self.pg0.remote_ip4, |
| 379 | self.pg1._remote_hosts[5].ip4) |
| 380 | |
| 381 | # |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 382 | # ARP requests from hosts in pg1's subnet sent on pg2 are replied to |
| 383 | # with the unnumbered interface's address as the source |
| 384 | # |
| 385 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| 386 | ARP(op="who-has", |
| 387 | hwsrc=self.pg2.remote_mac, |
| 388 | pdst=self.pg1.local_ip4, |
| 389 | psrc=self.pg1.remote_hosts[6].ip4)) |
| 390 | |
| 391 | self.pg2.add_stream(p) |
| 392 | self.pg_enable_capture(self.pg_interfaces) |
| 393 | self.pg_start() |
| 394 | |
| 395 | rx = self.pg2.get_capture(1) |
| 396 | self.verify_arp_resp(rx[0], |
| 397 | self.pg2.local_mac, |
| 398 | self.pg2.remote_mac, |
| 399 | self.pg1.local_ip4, |
| 400 | self.pg1.remote_hosts[6].ip4) |
| 401 | |
| 402 | # |
| 403 | # An attached host route out of pg2 for an undiscovered hosts generates |
| 404 | # an ARP request with the unnumbered address as the source |
| 405 | # |
| 406 | att_unnum = VppIpRoute(self, self.pg1.remote_hosts[7].ip4, 32, |
| 407 | [VppRoutePath("0.0.0.0", |
| 408 | self.pg2.sw_if_index)]) |
| 409 | att_unnum.add_vpp_config() |
| 410 | |
| 411 | p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| 412 | IP(src=self.pg0.remote_ip4, |
| 413 | dst=self.pg1._remote_hosts[7].ip4) / |
| 414 | UDP(sport=1234, dport=1234) / |
| 415 | Raw()) |
| 416 | |
| 417 | self.pg0.add_stream(p) |
| 418 | self.pg_enable_capture(self.pg_interfaces) |
| 419 | self.pg_start() |
| 420 | |
| 421 | rx = self.pg2.get_capture(1) |
| 422 | |
| 423 | self.verify_arp_req(rx[0], |
| 424 | self.pg2.local_mac, |
| 425 | self.pg1.local_ip4, |
| 426 | self.pg1._remote_hosts[7].ip4) |
| 427 | |
| 428 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| 429 | ARP(op="who-has", |
| 430 | hwsrc=self.pg2.remote_mac, |
| 431 | pdst=self.pg1.local_ip4, |
| 432 | psrc=self.pg1.remote_hosts[7].ip4)) |
| 433 | |
| 434 | self.pg2.add_stream(p) |
| 435 | self.pg_enable_capture(self.pg_interfaces) |
| 436 | self.pg_start() |
| 437 | |
| 438 | rx = self.pg2.get_capture(1) |
| 439 | self.verify_arp_resp(rx[0], |
| 440 | self.pg2.local_mac, |
| 441 | self.pg2.remote_mac, |
| 442 | self.pg1.local_ip4, |
| 443 | self.pg1.remote_hosts[7].ip4) |
| 444 | |
| 445 | # |
| 446 | # An attached host route as yet unresolved out of pg2 for an |
| 447 | # undiscovered host, an ARP requests begets a response. |
| 448 | # |
| 449 | att_unnum1 = VppIpRoute(self, self.pg1.remote_hosts[8].ip4, 32, |
| 450 | [VppRoutePath("0.0.0.0", |
| 451 | self.pg2.sw_if_index)]) |
| 452 | att_unnum1.add_vpp_config() |
| 453 | |
| 454 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| 455 | ARP(op="who-has", |
| 456 | hwsrc=self.pg2.remote_mac, |
| 457 | pdst=self.pg1.local_ip4, |
| 458 | psrc=self.pg1.remote_hosts[8].ip4)) |
| 459 | |
| 460 | self.pg2.add_stream(p) |
| 461 | self.pg_enable_capture(self.pg_interfaces) |
| 462 | self.pg_start() |
| 463 | |
| 464 | rx = self.pg2.get_capture(1) |
| 465 | self.verify_arp_resp(rx[0], |
| 466 | self.pg2.local_mac, |
| 467 | self.pg2.remote_mac, |
| 468 | self.pg1.local_ip4, |
| 469 | self.pg1.remote_hosts[8].ip4) |
| 470 | |
| 471 | # |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 472 | # Send an ARP request from one of the so-far unlearned remote hosts |
| 473 | # with a VLAN0 tag |
| 474 | # |
| 475 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", |
| 476 | src=self.pg1._remote_hosts[9].mac) / |
| 477 | Dot1Q(vlan=0) / |
| 478 | ARP(op="who-has", |
| 479 | hwsrc=self.pg1._remote_hosts[9].mac, |
| 480 | pdst=self.pg1.local_ip4, |
| 481 | psrc=self.pg1._remote_hosts[9].ip4)) |
| 482 | |
| 483 | self.pg1.add_stream(p) |
| 484 | self.pg_enable_capture(self.pg_interfaces) |
| 485 | self.pg_start() |
| 486 | |
| 487 | rx = self.pg1.get_capture(1) |
| 488 | self.verify_arp_resp(rx[0], |
| 489 | self.pg1.local_mac, |
| 490 | self.pg1._remote_hosts[9].mac, |
| 491 | self.pg1.local_ip4, |
| 492 | self.pg1._remote_hosts[9].ip4) |
| 493 | |
| 494 | # |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 495 | # Add a hierachy of routes for a host in the sub-net. |
| 496 | # Should still get an ARP resp since the cover is attached |
| 497 | # |
| 498 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg1.remote_mac) / |
| 499 | ARP(op="who-has", |
| 500 | hwsrc=self.pg1.remote_mac, |
| 501 | pdst=self.pg1.local_ip4, |
| 502 | psrc=self.pg1.remote_hosts[10].ip4)) |
| 503 | |
| 504 | r1 = VppIpRoute(self, self.pg1.remote_hosts[10].ip4, 30, |
| 505 | [VppRoutePath(self.pg1.remote_hosts[10].ip4, |
| 506 | self.pg1.sw_if_index)]) |
| 507 | r1.add_vpp_config() |
| 508 | |
| 509 | self.pg1.add_stream(p) |
| 510 | self.pg_enable_capture(self.pg_interfaces) |
| 511 | self.pg_start() |
| 512 | rx = self.pg1.get_capture(1) |
| 513 | self.verify_arp_resp(rx[0], |
| 514 | self.pg1.local_mac, |
| 515 | self.pg1.remote_mac, |
| 516 | self.pg1.local_ip4, |
| 517 | self.pg1.remote_hosts[10].ip4) |
| 518 | |
| 519 | r2 = VppIpRoute(self, self.pg1.remote_hosts[10].ip4, 32, |
| 520 | [VppRoutePath(self.pg1.remote_hosts[10].ip4, |
| 521 | self.pg1.sw_if_index)]) |
| 522 | r2.add_vpp_config() |
| 523 | |
| 524 | self.pg1.add_stream(p) |
| 525 | self.pg_enable_capture(self.pg_interfaces) |
| 526 | self.pg_start() |
| 527 | rx = self.pg1.get_capture(1) |
| 528 | self.verify_arp_resp(rx[0], |
| 529 | self.pg1.local_mac, |
| 530 | self.pg1.remote_mac, |
| 531 | self.pg1.local_ip4, |
| 532 | self.pg1.remote_hosts[10].ip4) |
| 533 | |
| 534 | # |
| 535 | # add an ARP entry that's not on the sub-net and so whose |
| 536 | # adj-fib fails the refinement check. then send an ARP request |
| 537 | # from that source |
| 538 | # |
| 539 | a1 = VppNeighbor(self, |
| 540 | self.pg0.sw_if_index, |
| 541 | self.pg0.remote_mac, |
| 542 | "100.100.100.50") |
| 543 | a1.add_vpp_config() |
| 544 | |
| 545 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| 546 | ARP(op="who-has", |
| 547 | hwsrc=self.pg0.remote_mac, |
| 548 | psrc="100.100.100.50", |
| 549 | pdst=self.pg0.remote_ip4)) |
| 550 | self.send_and_assert_no_replies(self.pg0, p, |
| 551 | "ARP req for from failed adj-fib") |
| 552 | |
| 553 | # |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 554 | # ERROR Cases |
| 555 | # 1 - don't respond to ARP request for address not within the |
| 556 | # interface's sub-net |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 557 | # 1b - nor within the unnumbered subnet |
| 558 | # 1c - nor within the subnet of a different interface |
| 559 | # |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 560 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| 561 | ARP(op="who-has", |
| 562 | hwsrc=self.pg0.remote_mac, |
| 563 | pdst="10.10.10.3", |
| 564 | psrc=self.pg0.remote_ip4)) |
| 565 | self.send_and_assert_no_replies(self.pg0, p, |
| 566 | "ARP req for non-local destination") |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 567 | self.assertFalse(find_nbr(self, |
| 568 | self.pg0.sw_if_index, |
| 569 | "10.10.10.3")) |
| 570 | |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 571 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| 572 | ARP(op="who-has", |
| 573 | hwsrc=self.pg2.remote_mac, |
| 574 | pdst="10.10.10.3", |
| 575 | psrc=self.pg1.remote_hosts[7].ip4)) |
| 576 | self.send_and_assert_no_replies( |
| 577 | self.pg0, p, |
| 578 | "ARP req for non-local destination - unnum") |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 579 | |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 580 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| 581 | ARP(op="who-has", |
| 582 | hwsrc=self.pg0.remote_mac, |
| 583 | pdst=self.pg1.local_ip4, |
| 584 | psrc=self.pg1.remote_ip4)) |
| 585 | self.send_and_assert_no_replies(self.pg0, p, |
| 586 | "ARP req diff sub-net") |
| 587 | self.assertFalse(find_nbr(self, |
| 588 | self.pg0.sw_if_index, |
| 589 | self.pg1.remote_ip4)) |
| 590 | |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 591 | # |
| 592 | # 2 - don't respond to ARP request from an address not within the |
| 593 | # interface's sub-net |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 594 | # 2b - to a prxied address |
| 595 | # 2c - not within a differents interface's sub-net |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 596 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| 597 | ARP(op="who-has", |
| 598 | hwsrc=self.pg0.remote_mac, |
| 599 | psrc="10.10.10.3", |
| 600 | pdst=self.pg0.local_ip4)) |
| 601 | self.send_and_assert_no_replies(self.pg0, p, |
| 602 | "ARP req for non-local source") |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 603 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| 604 | ARP(op="who-has", |
| 605 | hwsrc=self.pg2.remote_mac, |
| 606 | psrc="10.10.10.3", |
| 607 | pdst=self.pg0.local_ip4)) |
| 608 | self.send_and_assert_no_replies( |
| 609 | self.pg0, p, |
| 610 | "ARP req for non-local source - unnum") |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 611 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| 612 | ARP(op="who-has", |
| 613 | hwsrc=self.pg0.remote_mac, |
| 614 | psrc=self.pg1.remote_ip4, |
| 615 | pdst=self.pg0.local_ip4)) |
| 616 | self.send_and_assert_no_replies(self.pg0, p, |
| 617 | "ARP req for non-local source 2c") |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 618 | |
| 619 | # |
| 620 | # 3 - don't respond to ARP request from an address that belongs to |
| 621 | # the router |
| 622 | # |
| 623 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| 624 | ARP(op="who-has", |
| 625 | hwsrc=self.pg0.remote_mac, |
| 626 | psrc=self.pg0.local_ip4, |
| 627 | pdst=self.pg0.local_ip4)) |
| 628 | self.send_and_assert_no_replies(self.pg0, p, |
| 629 | "ARP req for non-local source") |
| 630 | |
| 631 | # |
| 632 | # 4 - don't respond to ARP requests that has mac source different |
| 633 | # from ARP request HW source |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 634 | # |
| 635 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| 636 | ARP(op="who-has", |
| 637 | hwsrc="00:00:00:DE:AD:BE", |
| 638 | psrc=self.pg0.remote_ip4, |
| 639 | pdst=self.pg0.local_ip4)) |
| 640 | self.send_and_assert_no_replies(self.pg0, p, |
| 641 | "ARP req for non-local source") |
| 642 | |
| 643 | # |
zhaoqingling | b4c42cd | 2017-12-23 15:20:59 +0800 | [diff] [blame] | 644 | # 5 - don't respond to ARP requests for address within the |
| 645 | # interface's sub-net but not the interface's address |
| 646 | # |
| 647 | self.pg0.generate_remote_hosts(2) |
| 648 | p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| 649 | ARP(op="who-has", |
| 650 | hwsrc=self.pg0.remote_mac, |
| 651 | psrc=self.pg0.remote_hosts[0].ip4, |
| 652 | pdst=self.pg0.remote_hosts[1].ip4)) |
| 653 | self.send_and_assert_no_replies(self.pg0, p, |
| 654 | "ARP req for non-local destination") |
| 655 | |
| 656 | # |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 657 | # cleanup |
| 658 | # |
| 659 | dyn_arp.remove_vpp_config() |
| 660 | static_arp.remove_vpp_config() |
Neale Ranns | 3983ac2 | 2017-03-10 11:53:27 -0800 | [diff] [blame] | 661 | self.pg2.unset_unnumbered(self.pg1.sw_if_index) |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 662 | |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 663 | # need this to flush the adj-fibs |
| 664 | self.pg2.unset_unnumbered(self.pg1.sw_if_index) |
| 665 | self.pg2.admin_down() |
Neale Ranns | ca19361 | 2017-06-14 06:50:08 -0700 | [diff] [blame] | 666 | self.pg1.admin_down() |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 667 | |
Neale Ranns | 24b170a | 2017-08-15 05:33:11 -0700 | [diff] [blame] | 668 | def test_proxy_mirror_arp(self): |
| 669 | """ Interface Mirror Proxy ARP """ |
| 670 | |
| 671 | # |
| 672 | # When VPP has an interface whose address is also applied to a TAP |
| 673 | # interface on the host, then VPP's TAP interface will be unnumbered |
| 674 | # to the 'real' interface and do proxy ARP from the host. |
| 675 | # the curious aspect of this setup is that ARP requests from the host |
| 676 | # will come from the VPP's own address. |
| 677 | # |
| 678 | self.pg0.generate_remote_hosts(2) |
| 679 | |
| 680 | arp_req_from_me = (Ether(src=self.pg2.remote_mac, |
| 681 | dst="ff:ff:ff:ff:ff:ff") / |
| 682 | ARP(op="who-has", |
| 683 | hwsrc=self.pg2.remote_mac, |
| 684 | pdst=self.pg0.remote_hosts[1].ip4, |
| 685 | psrc=self.pg0.local_ip4)) |
| 686 | |
| 687 | # |
| 688 | # Configure Proxy ARP for the subnet on PG0addresses on pg0 |
| 689 | # |
| 690 | self.vapi.proxy_arp_add_del(self.pg0._local_ip4n_subnet, |
| 691 | self.pg0._local_ip4n_bcast) |
| 692 | |
| 693 | # Make pg2 un-numbered to pg0 |
| 694 | # |
| 695 | self.pg2.set_unnumbered(self.pg0.sw_if_index) |
| 696 | |
| 697 | # |
| 698 | # Enable pg2 for proxy ARP |
| 699 | # |
| 700 | self.pg2.set_proxy_arp() |
| 701 | |
| 702 | # |
| 703 | # Send the ARP request with an originating address that |
| 704 | # is VPP's own address |
| 705 | # |
| 706 | self.pg2.add_stream(arp_req_from_me) |
| 707 | self.pg_enable_capture(self.pg_interfaces) |
| 708 | self.pg_start() |
| 709 | |
| 710 | rx = self.pg2.get_capture(1) |
| 711 | self.verify_arp_resp(rx[0], |
| 712 | self.pg2.local_mac, |
| 713 | self.pg2.remote_mac, |
| 714 | self.pg0.remote_hosts[1].ip4, |
| 715 | self.pg0.local_ip4) |
| 716 | |
| 717 | # |
| 718 | # validate we have not learned an ARP entry as a result of this |
| 719 | # |
| 720 | self.assertFalse(find_nbr(self, |
| 721 | self.pg2.sw_if_index, |
| 722 | self.pg0.local_ip4)) |
| 723 | |
| 724 | # |
| 725 | # cleanup |
| 726 | # |
| 727 | self.pg2.set_proxy_arp(0) |
| 728 | self.vapi.proxy_arp_add_del(self.pg0._local_ip4n_subnet, |
| 729 | self.pg0._local_ip4n_bcast, |
| 730 | is_add=0) |
| 731 | |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 732 | def test_proxy_arp(self): |
| 733 | """ Proxy ARP """ |
| 734 | |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 735 | self.pg1.generate_remote_hosts(2) |
| 736 | |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 737 | # |
| 738 | # Proxy ARP rewquest packets for each interface |
| 739 | # |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 740 | arp_req_pg0 = (Ether(src=self.pg0.remote_mac, |
| 741 | dst="ff:ff:ff:ff:ff:ff") / |
| 742 | ARP(op="who-has", |
| 743 | hwsrc=self.pg0.remote_mac, |
| 744 | pdst="10.10.10.3", |
| 745 | psrc=self.pg0.remote_ip4)) |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 746 | arp_req_pg0_tagged = (Ether(src=self.pg0.remote_mac, |
| 747 | dst="ff:ff:ff:ff:ff:ff") / |
| 748 | Dot1Q(vlan=0) / |
| 749 | ARP(op="who-has", |
| 750 | hwsrc=self.pg0.remote_mac, |
| 751 | pdst="10.10.10.3", |
| 752 | psrc=self.pg0.remote_ip4)) |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 753 | arp_req_pg1 = (Ether(src=self.pg1.remote_mac, |
| 754 | dst="ff:ff:ff:ff:ff:ff") / |
| 755 | ARP(op="who-has", |
| 756 | hwsrc=self.pg1.remote_mac, |
| 757 | pdst="10.10.10.3", |
| 758 | psrc=self.pg1.remote_ip4)) |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 759 | arp_req_pg2 = (Ether(src=self.pg2.remote_mac, |
| 760 | dst="ff:ff:ff:ff:ff:ff") / |
| 761 | ARP(op="who-has", |
| 762 | hwsrc=self.pg2.remote_mac, |
| 763 | pdst="10.10.10.3", |
| 764 | psrc=self.pg1.remote_hosts[1].ip4)) |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 765 | arp_req_pg3 = (Ether(src=self.pg3.remote_mac, |
| 766 | dst="ff:ff:ff:ff:ff:ff") / |
| 767 | ARP(op="who-has", |
| 768 | hwsrc=self.pg3.remote_mac, |
| 769 | pdst="10.10.10.3", |
| 770 | psrc=self.pg3.remote_ip4)) |
| 771 | |
| 772 | # |
| 773 | # Configure Proxy ARP for 10.10.10.0 -> 10.10.10.124 |
| 774 | # |
| 775 | self.vapi.proxy_arp_add_del(inet_pton(AF_INET, "10.10.10.2"), |
| 776 | inet_pton(AF_INET, "10.10.10.124")) |
| 777 | |
| 778 | # |
| 779 | # No responses are sent when the interfaces are not enabled for proxy |
| 780 | # ARP |
| 781 | # |
| 782 | self.send_and_assert_no_replies(self.pg0, arp_req_pg0, |
| 783 | "ARP req from unconfigured interface") |
| 784 | self.send_and_assert_no_replies(self.pg2, arp_req_pg2, |
| 785 | "ARP req from unconfigured interface") |
| 786 | |
| 787 | # |
| 788 | # Make pg2 un-numbered to pg1 |
| 789 | # still won't reply. |
| 790 | # |
| 791 | self.pg2.set_unnumbered(self.pg1.sw_if_index) |
| 792 | |
| 793 | self.send_and_assert_no_replies(self.pg2, arp_req_pg2, |
| 794 | "ARP req from unnumbered interface") |
| 795 | |
| 796 | # |
| 797 | # Enable each interface to reply to proxy ARPs |
| 798 | # |
| 799 | for i in self.pg_interfaces: |
| 800 | i.set_proxy_arp() |
| 801 | |
| 802 | # |
| 803 | # Now each of the interfaces should reply to a request to a proxied |
| 804 | # address |
| 805 | # |
| 806 | self.pg0.add_stream(arp_req_pg0) |
| 807 | self.pg_enable_capture(self.pg_interfaces) |
| 808 | self.pg_start() |
| 809 | |
| 810 | rx = self.pg0.get_capture(1) |
| 811 | self.verify_arp_resp(rx[0], |
| 812 | self.pg0.local_mac, |
| 813 | self.pg0.remote_mac, |
| 814 | "10.10.10.3", |
| 815 | self.pg0.remote_ip4) |
| 816 | |
Neale Ranns | 30d0fd4 | 2017-05-30 07:30:04 -0700 | [diff] [blame] | 817 | self.pg0.add_stream(arp_req_pg0_tagged) |
| 818 | self.pg_enable_capture(self.pg_interfaces) |
| 819 | self.pg_start() |
| 820 | |
| 821 | rx = self.pg0.get_capture(1) |
| 822 | self.verify_arp_resp(rx[0], |
| 823 | self.pg0.local_mac, |
| 824 | self.pg0.remote_mac, |
| 825 | "10.10.10.3", |
| 826 | self.pg0.remote_ip4) |
| 827 | |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 828 | self.pg1.add_stream(arp_req_pg1) |
| 829 | self.pg_enable_capture(self.pg_interfaces) |
| 830 | self.pg_start() |
| 831 | |
| 832 | rx = self.pg1.get_capture(1) |
| 833 | self.verify_arp_resp(rx[0], |
| 834 | self.pg1.local_mac, |
| 835 | self.pg1.remote_mac, |
| 836 | "10.10.10.3", |
| 837 | self.pg1.remote_ip4) |
| 838 | |
| 839 | self.pg2.add_stream(arp_req_pg2) |
| 840 | self.pg_enable_capture(self.pg_interfaces) |
| 841 | self.pg_start() |
| 842 | |
| 843 | rx = self.pg2.get_capture(1) |
| 844 | self.verify_arp_resp(rx[0], |
| 845 | self.pg2.local_mac, |
| 846 | self.pg2.remote_mac, |
| 847 | "10.10.10.3", |
Neale Ranns | d5b6aa1 | 2017-05-16 08:46:45 -0700 | [diff] [blame] | 848 | self.pg1.remote_hosts[1].ip4) |
Neale Ranns | 39f9d8b | 2017-02-16 21:57:05 -0800 | [diff] [blame] | 849 | |
| 850 | # |
| 851 | # A request for an address out of the configured range |
| 852 | # |
| 853 | arp_req_pg1_hi = (Ether(src=self.pg1.remote_mac, |
| 854 | dst="ff:ff:ff:ff:ff:ff") / |
| 855 | ARP(op="who-has", |
| 856 | hwsrc=self.pg1.remote_mac, |
| 857 | pdst="10.10.10.125", |
| 858 | psrc=self.pg1.remote_ip4)) |
| 859 | self.send_and_assert_no_replies(self.pg1, arp_req_pg1_hi, |
| 860 | "ARP req out of range HI") |
| 861 | arp_req_pg1_low = (Ether(src=self.pg1.remote_mac, |
| 862 | dst="ff:ff:ff:ff:ff:ff") / |
| 863 | ARP(op="who-has", |
| 864 | hwsrc=self.pg1.remote_mac, |
| 865 | pdst="10.10.10.1", |
| 866 | psrc=self.pg1.remote_ip4)) |
| 867 | self.send_and_assert_no_replies(self.pg1, arp_req_pg1_low, |
| 868 | "ARP req out of range Low") |
| 869 | |
| 870 | # |
| 871 | # Request for an address in the proxy range but from an interface |
| 872 | # in a different VRF |
| 873 | # |
| 874 | self.send_and_assert_no_replies(self.pg3, arp_req_pg3, |
| 875 | "ARP req from different VRF") |
| 876 | |
| 877 | # |
| 878 | # Disable Each interface for proxy ARP |
| 879 | # - expect none to respond |
| 880 | # |
| 881 | for i in self.pg_interfaces: |
| 882 | i.set_proxy_arp(0) |
| 883 | |
| 884 | self.send_and_assert_no_replies(self.pg0, arp_req_pg0, |
| 885 | "ARP req from disable") |
| 886 | self.send_and_assert_no_replies(self.pg1, arp_req_pg1, |
| 887 | "ARP req from disable") |
| 888 | self.send_and_assert_no_replies(self.pg2, arp_req_pg2, |
| 889 | "ARP req from disable") |
Neale Ranns | 37be736 | 2017-02-21 17:30:26 -0800 | [diff] [blame] | 890 | |
| 891 | # |
| 892 | # clean up on interface 2 |
| 893 | # |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 894 | self.pg2.unset_unnumbered(self.pg1.sw_if_index) |
Neale Ranns | 37be736 | 2017-02-21 17:30:26 -0800 | [diff] [blame] | 895 | |
| 896 | def test_mpls(self): |
| 897 | """ MPLS """ |
| 898 | |
| 899 | # |
| 900 | # Interface 2 does not yet have ip4 config |
| 901 | # |
| 902 | self.pg2.config_ip4() |
| 903 | self.pg2.generate_remote_hosts(2) |
| 904 | |
| 905 | # |
| 906 | # Add a reoute with out going label via an ARP unresolved next-hop |
| 907 | # |
| 908 | ip_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32, |
| 909 | [VppRoutePath(self.pg2.remote_hosts[1].ip4, |
| 910 | self.pg2.sw_if_index, |
| 911 | labels=[55])]) |
| 912 | ip_10_0_0_1.add_vpp_config() |
| 913 | |
| 914 | # |
| 915 | # packets should generate an ARP request |
| 916 | # |
| 917 | p = (Ether(src=self.pg0.remote_mac, |
| 918 | dst=self.pg0.local_mac) / |
| 919 | IP(src=self.pg0.remote_ip4, dst="10.0.0.1") / |
| 920 | UDP(sport=1234, dport=1234) / |
| 921 | Raw('\xa5' * 100)) |
| 922 | |
| 923 | self.pg0.add_stream(p) |
| 924 | self.pg_enable_capture(self.pg_interfaces) |
| 925 | self.pg_start() |
| 926 | |
| 927 | rx = self.pg2.get_capture(1) |
| 928 | self.verify_arp_req(rx[0], |
| 929 | self.pg2.local_mac, |
| 930 | self.pg2.local_ip4, |
| 931 | self.pg2._remote_hosts[1].ip4) |
| 932 | |
| 933 | # |
| 934 | # now resolve the neighbours |
| 935 | # |
| 936 | self.pg2.configure_ipv4_neighbors() |
| 937 | |
| 938 | # |
| 939 | # Now packet should be properly MPLS encapped. |
| 940 | # This verifies that MPLS link-type adjacencies are completed |
| 941 | # when the ARP entry resolves |
| 942 | # |
| 943 | self.pg0.add_stream(p) |
| 944 | self.pg_enable_capture(self.pg_interfaces) |
| 945 | self.pg_start() |
| 946 | |
| 947 | rx = self.pg2.get_capture(1) |
| 948 | self.verify_ip_o_mpls(rx[0], |
| 949 | self.pg2.local_mac, |
| 950 | self.pg2.remote_hosts[1].mac, |
| 951 | 55, |
| 952 | self.pg0.remote_ip4, |
| 953 | "10.0.0.1") |
Neale Ranns | 4b919a5 | 2017-03-11 05:55:21 -0800 | [diff] [blame] | 954 | self.pg2.unconfig_ip4() |
Neale Ranns | 37be736 | 2017-02-21 17:30:26 -0800 | [diff] [blame] | 955 | |
Matthew Smith | cb9ab47 | 2017-05-16 21:35:56 -0500 | [diff] [blame] | 956 | def test_arp_vrrp(self): |
| 957 | """ ARP reply with VRRP virtual src hw addr """ |
| 958 | |
| 959 | # |
| 960 | # IP packet destined for pg1 remote host arrives on pg0 resulting |
| 961 | # in an ARP request for the address of the remote host on pg1 |
| 962 | # |
| 963 | p0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| 964 | IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / |
| 965 | UDP(sport=1234, dport=1234) / |
| 966 | Raw()) |
| 967 | |
| 968 | self.pg0.add_stream(p0) |
| 969 | self.pg_enable_capture(self.pg_interfaces) |
| 970 | self.pg_start() |
| 971 | |
| 972 | rx1 = self.pg1.get_capture(1) |
| 973 | |
| 974 | self.verify_arp_req(rx1[0], |
| 975 | self.pg1.local_mac, |
| 976 | self.pg1.local_ip4, |
| 977 | self.pg1.remote_ip4) |
| 978 | |
| 979 | # |
| 980 | # ARP reply for address of pg1 remote host arrives on pg1 with |
| 981 | # the hw src addr set to a value in the VRRP IPv4 range of |
| 982 | # MAC addresses |
| 983 | # |
| 984 | p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / |
| 985 | ARP(op="is-at", hwdst=self.pg1.local_mac, |
| 986 | hwsrc="00:00:5e:00:01:09", pdst=self.pg1.local_ip4, |
| 987 | psrc=self.pg1.remote_ip4)) |
| 988 | |
| 989 | self.pg1.add_stream(p1) |
| 990 | self.pg_enable_capture(self.pg_interfaces) |
| 991 | self.pg_start() |
| 992 | |
| 993 | # |
| 994 | # IP packet destined for pg1 remote host arrives on pg0 again. |
| 995 | # VPP should have an ARP entry for that address now and the packet |
| 996 | # should be sent out pg1. |
| 997 | # |
| 998 | self.pg0.add_stream(p0) |
| 999 | self.pg_enable_capture(self.pg_interfaces) |
| 1000 | self.pg_start() |
| 1001 | |
| 1002 | rx1 = self.pg1.get_capture(1) |
| 1003 | |
| 1004 | self.verify_ip(rx1[0], |
| 1005 | self.pg1.local_mac, |
| 1006 | "00:00:5e:00:01:09", |
| 1007 | self.pg0.remote_ip4, |
| 1008 | self.pg1.remote_ip4) |
| 1009 | |
| 1010 | self.pg1.admin_down() |
| 1011 | self.pg1.admin_up() |
| 1012 | |
Neale Ranns | dcd6d62 | 2017-05-26 02:59:16 -0700 | [diff] [blame] | 1013 | def test_arp_duplicates(self): |
| 1014 | """ ARP Duplicates""" |
| 1015 | |
| 1016 | # |
| 1017 | # Generate some hosts on the LAN |
| 1018 | # |
| 1019 | self.pg1.generate_remote_hosts(3) |
| 1020 | |
| 1021 | # |
| 1022 | # Add host 1 on pg1 and pg2 |
| 1023 | # |
| 1024 | arp_pg1 = VppNeighbor(self, |
| 1025 | self.pg1.sw_if_index, |
| 1026 | self.pg1.remote_hosts[1].mac, |
| 1027 | self.pg1.remote_hosts[1].ip4) |
| 1028 | arp_pg1.add_vpp_config() |
| 1029 | arp_pg2 = VppNeighbor(self, |
| 1030 | self.pg2.sw_if_index, |
| 1031 | self.pg2.remote_mac, |
| 1032 | self.pg1.remote_hosts[1].ip4) |
| 1033 | arp_pg2.add_vpp_config() |
| 1034 | |
| 1035 | # |
| 1036 | # IP packet destined for pg1 remote host arrives on pg1 again. |
| 1037 | # |
| 1038 | p = (Ether(dst=self.pg0.local_mac, |
| 1039 | src=self.pg0.remote_mac) / |
| 1040 | IP(src=self.pg0.remote_ip4, |
| 1041 | dst=self.pg1.remote_hosts[1].ip4) / |
| 1042 | UDP(sport=1234, dport=1234) / |
| 1043 | Raw()) |
| 1044 | |
| 1045 | self.pg0.add_stream(p) |
| 1046 | self.pg_enable_capture(self.pg_interfaces) |
| 1047 | self.pg_start() |
| 1048 | |
| 1049 | rx1 = self.pg1.get_capture(1) |
| 1050 | |
| 1051 | self.verify_ip(rx1[0], |
| 1052 | self.pg1.local_mac, |
| 1053 | self.pg1.remote_hosts[1].mac, |
| 1054 | self.pg0.remote_ip4, |
| 1055 | self.pg1.remote_hosts[1].ip4) |
| 1056 | |
| 1057 | # |
| 1058 | # remove the duplicate on pg1 |
| 1059 | # packet stream shoud generate ARPs out of pg1 |
| 1060 | # |
| 1061 | arp_pg1.remove_vpp_config() |
| 1062 | |
| 1063 | self.pg0.add_stream(p) |
| 1064 | self.pg_enable_capture(self.pg_interfaces) |
| 1065 | self.pg_start() |
| 1066 | |
| 1067 | rx1 = self.pg1.get_capture(1) |
| 1068 | |
| 1069 | self.verify_arp_req(rx1[0], |
| 1070 | self.pg1.local_mac, |
| 1071 | self.pg1.local_ip4, |
| 1072 | self.pg1.remote_hosts[1].ip4) |
| 1073 | |
| 1074 | # |
| 1075 | # Add it back |
| 1076 | # |
| 1077 | arp_pg1.add_vpp_config() |
| 1078 | |
| 1079 | self.pg0.add_stream(p) |
| 1080 | self.pg_enable_capture(self.pg_interfaces) |
| 1081 | self.pg_start() |
| 1082 | |
| 1083 | rx1 = self.pg1.get_capture(1) |
| 1084 | |
| 1085 | self.verify_ip(rx1[0], |
| 1086 | self.pg1.local_mac, |
| 1087 | self.pg1.remote_hosts[1].mac, |
| 1088 | self.pg0.remote_ip4, |
| 1089 | self.pg1.remote_hosts[1].ip4) |
| 1090 | |
Neale Ranns | 1500254 | 2017-09-10 04:39:11 -0700 | [diff] [blame] | 1091 | def test_arp_static(self): |
| 1092 | """ ARP Static""" |
| 1093 | self.pg2.generate_remote_hosts(3) |
| 1094 | |
| 1095 | # |
| 1096 | # Add a static ARP entry |
| 1097 | # |
| 1098 | static_arp = VppNeighbor(self, |
| 1099 | self.pg2.sw_if_index, |
| 1100 | self.pg2.remote_hosts[1].mac, |
| 1101 | self.pg2.remote_hosts[1].ip4, |
| 1102 | is_static=1) |
| 1103 | static_arp.add_vpp_config() |
| 1104 | |
| 1105 | # |
| 1106 | # Add the connected prefix to the interface |
| 1107 | # |
| 1108 | self.pg2.config_ip4() |
| 1109 | |
| 1110 | # |
| 1111 | # We should now find the adj-fib |
| 1112 | # |
| 1113 | self.assertTrue(find_nbr(self, |
| 1114 | self.pg2.sw_if_index, |
| 1115 | self.pg2.remote_hosts[1].ip4, |
| 1116 | is_static=1)) |
| 1117 | self.assertTrue(find_route(self, |
| 1118 | self.pg2.remote_hosts[1].ip4, |
| 1119 | 32)) |
| 1120 | |
| 1121 | # |
| 1122 | # remove the connected |
| 1123 | # |
| 1124 | self.pg2.unconfig_ip4() |
| 1125 | |
| 1126 | # |
| 1127 | # put the interface into table 1 |
| 1128 | # |
| 1129 | self.pg2.set_table_ip4(1) |
| 1130 | |
| 1131 | # |
| 1132 | # configure the same connected and expect to find the |
| 1133 | # adj fib in the new table |
| 1134 | # |
| 1135 | self.pg2.config_ip4() |
| 1136 | self.assertTrue(find_route(self, |
| 1137 | self.pg2.remote_hosts[1].ip4, |
| 1138 | 32, |
| 1139 | table_id=1)) |
| 1140 | |
| 1141 | # |
| 1142 | # clean-up |
| 1143 | # |
| 1144 | self.pg2.unconfig_ip4() |
| 1145 | self.pg2.set_table_ip4(0) |
| 1146 | |
Neale Ranns | c819fc6 | 2018-02-16 02:44:05 -0800 | [diff] [blame] | 1147 | def test_arp_incomplete(self): |
| 1148 | """ ARP Incomplete""" |
| 1149 | self.pg1.generate_remote_hosts(3) |
| 1150 | |
| 1151 | p0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| 1152 | IP(src=self.pg0.remote_ip4, |
| 1153 | dst=self.pg1.remote_hosts[1].ip4) / |
| 1154 | UDP(sport=1234, dport=1234) / |
| 1155 | Raw()) |
| 1156 | p1 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| 1157 | IP(src=self.pg0.remote_ip4, |
| 1158 | dst=self.pg1.remote_hosts[2].ip4) / |
| 1159 | UDP(sport=1234, dport=1234) / |
| 1160 | Raw()) |
| 1161 | |
| 1162 | # |
| 1163 | # a packet to an unresolved destination generates an ARP request |
| 1164 | # |
| 1165 | rx = self.send_and_expect(self.pg0, [p0], self.pg1) |
| 1166 | self.verify_arp_req(rx[0], |
| 1167 | self.pg1.local_mac, |
| 1168 | self.pg1.local_ip4, |
| 1169 | self.pg1._remote_hosts[1].ip4) |
| 1170 | |
| 1171 | # |
| 1172 | # add a neighbour for remote host 1 |
| 1173 | # |
| 1174 | static_arp = VppNeighbor(self, |
| 1175 | self.pg1.sw_if_index, |
| 1176 | self.pg1.remote_hosts[1].mac, |
| 1177 | self.pg1.remote_hosts[1].ip4, |
| 1178 | is_static=1) |
| 1179 | static_arp.add_vpp_config() |
| 1180 | |
| 1181 | # |
| 1182 | # change the interface's MAC |
| 1183 | # |
| 1184 | mac = [chr(0x00), chr(0x00), chr(0x00), |
| 1185 | chr(0x33), chr(0x33), chr(0x33)] |
| 1186 | mac_string = ''.join(mac) |
| 1187 | |
| 1188 | self.vapi.sw_interface_set_mac_address(self.pg1.sw_if_index, |
| 1189 | mac_string) |
| 1190 | |
| 1191 | # |
| 1192 | # now ARP requests come from the new source mac |
| 1193 | # |
| 1194 | rx = self.send_and_expect(self.pg0, [p1], self.pg1) |
| 1195 | self.verify_arp_req(rx[0], |
| 1196 | "00:00:00:33:33:33", |
| 1197 | self.pg1.local_ip4, |
| 1198 | self.pg1._remote_hosts[2].ip4) |
| 1199 | |
| 1200 | # |
| 1201 | # packets to the resolved host also have the new source mac |
| 1202 | # |
| 1203 | rx = self.send_and_expect(self.pg0, [p0], self.pg1) |
| 1204 | self.verify_ip(rx[0], |
| 1205 | "00:00:00:33:33:33", |
| 1206 | self.pg1.remote_hosts[1].mac, |
| 1207 | self.pg0.remote_ip4, |
| 1208 | self.pg1.remote_hosts[1].ip4) |
| 1209 | |
| 1210 | # |
| 1211 | # set the mac address on the inteface that does not have a |
| 1212 | # configured subnet and thus no glean |
| 1213 | # |
| 1214 | self.vapi.sw_interface_set_mac_address(self.pg2.sw_if_index, |
| 1215 | mac_string) |
| 1216 | |
Neale Ranns | dcd6d62 | 2017-05-26 02:59:16 -0700 | [diff] [blame] | 1217 | |
Neale Ranns | 37be736 | 2017-02-21 17:30:26 -0800 | [diff] [blame] | 1218 | if __name__ == '__main__': |
| 1219 | unittest.main(testRunner=VppTestRunner) |