punt: fix tracing for partially traced chains - vpp

diff options

author	Klement Sekera <ksekera@cisco.com>	2017-11-08 04:13:49 +0100
committer	Neale Ranns <nranns@cisco.com>	2017-12-08 13:56:03 +0000
commit	b716308ca558e8fcc1297903bf78c1673af44154 (patch)
tree	b35ed46f32f33f8b8944d2a9824ff6796257e45a /src/vnet/bfd
parent	0708515198710c713fdd07f5519e1fb6ea594948 (diff)

punt: fix tracing for partially traced chains

This fixes a crash if the first buffer in buffer chain is not traced, but some other buffer (mid-chain) is. Change-Id: I2c9f529ae0bc3263d20981e0cb83ce24ed292bd8 Signed-off-by: Klement Sekera <ksekera@cisco.com>

Diffstat (limited to 'src/vnet/bfd')

0 files changed, 0 insertions, 0 deletions

='#n139'>139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480

#!/usr/bin/env python
"""L2BD Multi-instance Test Case HLD:

**NOTES:**
    - higher number of pg-l2 interfaces causes problems => only 15 pg-l2 \
    interfaces in 5 bridge domains are tested
    - jumbo packets in configuration with 14 l2-pg interfaces leads to \
    problems too

**config 1**
    - add 15 pg-l2 interfaces
    - configure one host per pg-l2 interface
    - configure 5 bridge domains (BD)
    - add 3 pg-l2 interfaces per BD

**test 1**
    - send L2 MAC frames between all pg-l2 interfaces of all BDs

**verify 1**
    - check BD data by parsing output of bridge_domain_dump API command
    - all packets received correctly

**config 2**
    - update data of 5 BD
        - disable learning, forwarding, flooding and uu_flooding for BD1
        - disable forwarding for BD2
        - disable flooding for BD3
        - disable uu_flooding for BD4
        - disable learning for BD5

**verify 2**
    - check BD data by parsing output of bridge_domain_dump API command

**config 3**
    - delete 2 BDs

**test 3**
    - send L2 MAC frames between all pg-l2 interfaces of all BDs
    - send L2 MAC frames between all pg-l2 interfaces formerly assigned to \
    deleted BDs

**verify 3**
    - check BD data by parsing output of bridge_domain_dump API command
    - all packets received correctly on all 3 pg-l2 interfaces assigned to BDs
    - no packet received on all 3 pg-l2 interfaces of all deleted BDs

**config 4**
    - add 2 BDs
    - add 3 pg-l2 interfaces per BD

**test 4**
    - send L2 MAC frames between all pg-l2 interfaces of all BDs

**verify 4**
    - check BD data by parsing output of bridge_domain_dump API command
    - all packets received correctly

**config 5**
    - delete 5 BDs

**verify 5**
    - check BD data by parsing output of bridge_domain_dump API command
"""

import unittest
import random

from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP

from framework import VppTestCase, VppTestRunner, running_extended_tests
from util import Host, ppp


class TestL2bdMultiInst(VppTestCase):
    """ L2BD Multi-instance Test Case """

    @classmethod
    def setUpClass(cls):
        """
        Perform standard class setup (defined by class method setUpClass in
        class VppTestCase) before running the test case, set test case related
        variables and configure VPP.
        """
        super(TestL2bdMultiInst, cls).setUpClass()

        try:
            # Create pg interfaces
            n_bd = 5
            cls.ifs_per_bd = ifs_per_bd = 3
            n_ifs = n_bd * ifs_per_bd
            cls.create_pg_interfaces(range(n_ifs))

            # Packet flows mapping pg0 -> pg1, pg2 etc.
            cls.flows = dict()
            for b in range(n_bd):
                bd_ifs = cls.bd_if_range(b + 1)
                for j in bd_ifs:
                    cls.flows[cls.pg_interfaces[j]] = [
                        cls.pg_interfaces[x] for x in bd_ifs if x != j]
                    assert(
                        len(cls.flows[cls.pg_interfaces[j]]) == ifs_per_bd - 1)

            # Mapping between packet-generator index and lists of test hosts
            cls.hosts_by_pg_idx = dict()

            # Create test host entries
            cls.create_hosts(5)

            # Packet sizes - jumbo packet (9018 bytes) skipped
            cls.pg_if_packet_sizes = [64, 512, 1518]

            # Set up all interfaces
            for i in cls.pg_interfaces:
                i.admin_up()

            # Create list of BDs
            cls.bd_list = list()

            # Create list of deleted BDs
            cls.bd_deleted_list = list()

            # Create list of pg_interfaces in BDs
            cls.pg_in_bd = list()

        except Exception:
            super(TestL2bdMultiInst, cls).tearDownClass()
            raise

    def setUp(self):
        """
        Clear trace and packet infos before running each test.
        """
        self.reset_packet_infos()
        super(TestL2bdMultiInst, self).setUp()

    def tearDown(self):
        """
        Show various debug prints after each test.
        """
        super(TestL2bdMultiInst, self).tearDown()
        if not self.vpp_dead:
            self.logger.info(self.vapi.ppcli("show l2fib verbose"))
            self.logger.info(self.vapi.ppcli("show bridge-domain"))

    @classmethod
    def create_hosts(cls, hosts_per_if):
        """
        Create required number of host MAC addresses and distribute them
        among interfaces. Create host IPv4 address for every host MAC
        address.

        :param int hosts_per_if: Number of hosts per if to create MAC/IPv4
                                 addresses for.
        """
        c = hosts_per_if
        assert(not cls.hosts_by_pg_idx)
        for i in range(len(cls.pg_interfaces)):
            pg_idx = cls.pg_interfaces[i].sw_if_index
            cls.hosts_by_pg_idx[pg_idx] = [Host(
                "00:00:00:ff:%02x:%02x" % (pg_idx, j + 1),
                "172.17.1%02u.%u" % (pg_idx, j + 1)) for j in range(c)]

    @classmethod
    def bd_if_range(cls, b):
        n = cls.ifs_per_bd
        start = (b - 1) * n
        return range(start, start + n)

    def create_bd_and_mac_learn(self, count, start=1):
        """
        Create required number of bridge domains with MAC learning enabled,
        put 3 l2-pg interfaces to every bridge domain and send MAC learning
        packets.

        :param int count: Number of bridge domains to be created.
        :param int start: Starting number of the bridge domain ID.
            (Default value = 1)
        """
        for b in range(start, start + count):
            self.vapi.bridge_domain_add_del(bd_id=b)
            self.logger.info("Bridge domain ID %d created" % b)
            if self.bd_list.count(b) == 0:
                self.bd_list.append(b)
            if self.bd_deleted_list.count(b) == 1:
                self.bd_deleted_list.remove(b)
            for j in self.bd_if_range(b):
                pg_if = self.pg_interfaces[j]
                self.vapi.sw_interface_set_l2_bridge(
                    rx_sw_if_index=pg_if.sw_if_index, bd_id=b)
                self.logger.info("pg-interface %s added to bridge domain ID %d"
                                 % (pg_if.name, b))
                self.pg_in_bd.append(pg_if)
                hosts = self.hosts_by_pg_idx[pg_if.sw_if_index]
                packets = [Ether(dst="ff:ff:ff:ff:ff:ff", src=host.mac)
                           for host in hosts]
                pg_if.add_stream(packets)
        self.logger.info("Sending broadcast eth frames for MAC learning")
        self.pg_start()
        self.logger.info(self.vapi.ppcli("show bridge-domain"))
        self.logger.info(self.vapi.ppcli("show l2fib"))

    def delete_bd(self, count, start=1):
        """
        Delete required number of bridge domains.

        :param int count: Number of bridge domains to be created.
        :param int start: Starting number of the bridge domain ID.
            (Default value = 1)
        """
        for b in range(start, start + count):
            for j in self.bd_if_range(b):
                pg_if = self.pg_interfaces[j]
                self.vapi.sw_interface_set_l2_bridge(
                    rx_sw_if_index=pg_if.sw_if_index, bd_id=b, enable=0)
                self.pg_in_bd.remove(pg_if)
            self.vapi.bridge_domain_add_del(bd_id=b, is_add=0)
            self.bd_list.remove(b)
            self.bd_deleted_list.append(b)
            self.logger.info("Bridge domain ID %d deleted" % b)

    def create_stream(self, src_if):
        """
        Create input packet stream for defined interface using hosts list.

        :param object src_if: Interface to create packet stream for.
        :param list packet_sizes: List of required packet sizes.
        :return: Stream of packets.
        """
        packet_sizes = self.pg_if_packet_sizes
        pkts = []
        src_hosts = self.hosts_by_pg_idx[src_if.sw_if_index]
        for dst_if in self.flows[src_if]:
            dst_hosts = self.hosts_by_pg_idx[dst_if.sw_if_index]
            for dst_host in dst_hosts:
                pkt_info = self.create_packet_info(src_if, dst_if)
                payload = self.info_to_payload(pkt_info)
                src_host = random.choice(src_hosts)
                p = (Ether(dst=dst_host.mac, src=src_host.mac) /
                     IP(src=src_host.ip4, dst=dst_host.ip4) /
                     UDP(sport=1234, dport=1234) /
                     Raw(payload))
                pkt_info.data = p.copy()
                size = random.choice(packet_sizes)
                self.extend_packet(p, size)
                pkts.append(p)
        self.logger.debug("Input stream created for port %s. Length: %u pkt(s)"
                          % (src_if.name, len(pkts)))
        return pkts

    def verify_capture(self, dst_if):
        """
        Verify captured input packet stream for defined interface.

        :param object dst_if: Interface to verify captured packet stream for.
        """
        last_info = dict()
        for i in self.flows[dst_if]:
            last_info[i.sw_if_index] = None
        dst = dst_if.sw_if_index
        for packet in dst_if.get_capture():
            try:
                ip = packet[IP]
                udp = packet[UDP]
                info = self.payload_to_info(packet[Raw])
                self.assertEqual(info.dst, dst)
                self.logger.debug("Got packet on port %s: src=%u (id=%u)" %
                                  (dst_if.name, info.src, info.index))
                last_info[info.src] = self.get_next_packet_info_for_interface2(
                    info.src, dst, last_info[info.src])
                pkt_info = last_info[info.src]
                self.assertTrue(pkt_info is not None)
                self.assertEqual(info.index, pkt_info.index)
                # Check standard fields against saved data in pkt
                saved = pkt_info.data
                self.assertEqual(ip.src, saved[IP].src)
                self.assertEqual(ip.dst, saved[IP].dst)
                self.assertEqual(udp.sport, saved[UDP].sport)
                self.assertEqual(udp.dport, saved[UDP].dport)
            except:
                self.logger.error(ppp("Unexpected or invalid packet:", packet))
                raise
        s = ""
        remaining = 0
        for src in self.flows[dst_if]:
            remaining_packet = self.get_next_packet_info_for_interface2(
                src.sw_if_index, dst, last_info[src.sw_if_index])
            if remaining_packet is None:
                s += "Port %u: Packet expected from source %u didn't arrive\n"\
                     % (dst, src.sw_if_index)
                remaining += 1
            self.assertNotEqual(0, remaining, s)

    def set_bd_flags(self, bd_id, **args):
        """
        Enable/disable defined feature(s) of the bridge domain.

        :param int bd_id: Bridge domain ID.
        :param list args: List of feature/status pairs. Allowed features: \
        learn, forward, flood, uu_flood and arp_term. Status False means \
        disable, status True means enable the feature.
        :raise: ValueError in case of unknown feature in the input.
        """
        for flag in args:
            if flag == "learn":
                feature_bitmap = 1 << 0
            elif flag == "forward":
                feature_bitmap = 1 << 1
            elif flag == "flood":
                feature_bitmap = 1 << 2
            elif flag == "uu_flood":
                feature_bitmap = 1 << 3
            elif flag == "arp_term":
                feature_bitmap = 1 << 4
            else:
                raise ValueError("Unknown feature used: %s" % flag)
            is_set = 1 if args[flag] else 0
            self.vapi.bridge_flags(bd_id=bd_id, is_set=is_set,
                                   flags=feature_bitmap)
        self.logger.info("Bridge domain ID %d updated" % bd_id)

    def verify_bd(self, bd_id, **args):
        """
        Check if the bridge domain is configured and verify expected status
        of listed features.

        :param int bd_id: Bridge domain ID.
        :param list args: List of feature/status pairs. Allowed features: \
        learn, forward, flood, uu_flood and arp_term. Status False means \
        disable, status True means enable the feature.
        :return: 1 if bridge domain is configured, otherwise return 0.
        :raise: ValueError in case of unknown feature in the input.
        """
        bd_dump = self.vapi.bridge_domain_dump(bd_id)
        if len(bd_dump) == 0:
            self.logger.info("Bridge domain ID %d is not configured" % bd_id)
            return 0
        else:
            bd_dump = bd_dump[0]
            if len(args) > 0:
                for flag in args:
                    expected_status = 1 if args[flag] else 0
                    if flag == "learn":
                        flag_status = bd_dump[6]
                    elif flag == "forward":
                        flag_status = bd_dump[5]
                    elif flag == "flood":
                        flag_status = bd_dump[3]
                    elif flag == "uu_flood":
                        flag_status = bd_dump[4]
                    elif flag == "arp_term":
                        flag_status = bd_dump[7]
                    else:
                        raise ValueError("Unknown feature used: %s" % flag)
                    self.assertEqual(expected_status, flag_status)
            return 1

    def run_verify_test(self):
        """
        Create packet streams for all configured l2-pg interfaces, send all \
        prepared packet streams and verify that:
            - all packets received correctly on all pg-l2 interfaces assigned
              to bridge domains
            - no packet received on all pg-l2 interfaces not assigned to
              bridge domains

        :raise RuntimeError: if no packet captured on l2-pg interface assigned
                             to the bridge domain or if any packet is captured
                             on l2-pg interface not assigned to the bridge
                             domain.
        """
        # Test
        # Create incoming packet streams for packet-generator interfaces
        # for pg_if in self.pg_interfaces:
        assert(len(self._packet_count_for_dst_if_idx) == 0)
        for pg_if in self.pg_in_bd:
            pkts = self.create_stream(pg_if)
            pg_if.add_stream(pkts)

        # Enable packet capture and start packet sending
        self.pg_enable_capture(self.pg_in_bd)
        self.pg_start()

        # Verify
        # Verify outgoing packet streams per packet-generator interface
        for pg_if in self.pg_in_bd:
            self.verify_capture(pg_if)

    def test_l2bd_inst_01(self):
        """ L2BD Multi-instance test 1 - create 5 BDs
        """
        # Config 1
        # Create 5 BDs, put interfaces to these BDs and send MAC learning
        # packets
        self.create_bd_and_mac_learn(5)

        # Verify 1
        for bd_id in self.bd_list:
            self.assertEqual(self.verify_bd(bd_id), 1)

        # Test 1
        # self.vapi.cli("clear trace")
        self.run_verify_test()

    def test_l2bd_inst_02(self):
        """ L2BD Multi-instance test 2 - update data of 5 BDs
        """
        # Config 2
        # Update data of 5 BDs (disable learn, forward, flood, uu-flood)
        self.set_bd_flags(self.bd_list[0], learn=False, forward=False,
                          flood=False, uu_flood=False)
        self.set_bd_flags(self.bd_list[1], forward=False)
        self.set_bd_flags(self.bd_list[2], flood=False)
        self.set_bd_flags(self.bd_list[3], uu_flood=False)
        self.set_bd_flags(self.bd_list[4], learn=False)

        # Verify 2
        # Skipping check of uu_flood as it is not returned by
        # bridge_domain_dump api command
        self.verify_bd(self.bd_list[0], learn=False, forward=False,
                       flood=False, uu_flood=False)
        self.verify_bd(self.bd_list[1], learn=True, forward=False,
                       flood=True, uu_flood=True)
        self.verify_bd(self.bd_list[2], learn=True, forward=True,
                       flood=False, uu_flood=True)
        self.verify_bd(self.bd_list[3], learn=True, forward=True,
                       flood=True, uu_flood=False)
        self.verify_bd(self.bd_list[4], learn=False, forward=True,
                       flood=True, uu_flood=True)

    def test_l2bd_inst_03(self):
        """ L2BD Multi-instance test 3 - delete 2 BDs
        """
        # Config 3
        # Delete 2 BDs
        self.delete_bd(2)

        # Verify 3
        for bd_id in self.bd_deleted_list:
            self.assertEqual(self.verify_bd(bd_id), 0)
        for bd_id in self.bd_list:
            self.assertEqual(self.verify_bd(bd_id), 1)

        # Test 3
        self.run_verify_test()

    def test_l2bd_inst_04(self):
        """ L2BD Multi-instance test 4 - add 2 BDs
        """
        # Config 4
        # Create 5 BDs, put interfaces to these BDs and send MAC learning
        # packets
        self.create_bd_and_mac_learn(2)

        # Verify 4
        for bd_id in self.bd_list:
            self.assertEqual(self.verify_bd(bd_id), 1)

        # Test 4
        # self.vapi.cli("clear trace")
        self.run_verify_test()

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    def test_l2bd_inst_05(self):
        """ L2BD Multi-instance test 5 - delete 5 BDs
        """
        # Config 5
        # Delete 5 BDs
        self.delete_bd(5)

        # Verify 5
        for bd_id in self.bd_deleted_list:
            self.assertEqual(self.verify_bd(bd_id), 0)
        for bd_id in self.bd_list:
            self.assertEqual(self.verify_bd(bd_id), 1)


if __name__ == '__main__':
    unittest.main(testRunner=VppTestRunner)


context:
space:
mode: