-#!/usr/bin/env python
+#!/usr/bin/env python3
+
+import six
import unittest
-from random import shuffle
+from random import shuffle, choice, randrange
from framework import VppTestCase, VppTestRunner
+import scapy.compat
from scapy.packet import Raw
from scapy.layers.l2 import Ether, GRE
-from scapy.layers.inet import IP, UDP
-from util import ppp, fragment_rfc791, fragment_rfc8200
-from scapy.layers.inet6 import IPv6, IPv6ExtHdrFragment, ICMPv6ParamProblem,\
- ICMPv6TimeExceeded
-from vpp_gre_interface import VppGreInterface, VppGre6Interface
-from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto
+from scapy.layers.inet import IP, UDP, ICMP
+from scapy.layers.inet6 import HBHOptUnknown, ICMPv6ParamProblem,\
+ ICMPv6TimeExceeded, IPv6, IPv6ExtHdrFragment, IPv6ExtHdrHopByHop
+from framework import VppTestCase, VppTestRunner
+from util import ppp, ppc, fragment_rfc791, fragment_rfc8200
+from vpp_gre_interface import VppGreInterface
+from vpp_ip import DpoProto
+from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathProto
+from vpp_papi import VppEnum
-test_packet_count = 257
+# 35 is enough to have >257 400-byte fragments
+test_packet_count = 35
+
+# number of workers used for multi-worker test cases
+worker_count = 3
class TestIPv4Reassembly(VppTestCase):
cls.create_stream(cls.packet_sizes)
cls.create_fragments()
+ @classmethod
+ def tearDownClass(cls):
+ super(TestIPv4Reassembly, cls).tearDownClass()
+
def setUp(self):
""" Test setup - force timeout on existing reassemblies """
super(TestIPv4Reassembly, self).setUp()
self.vapi.ip_reassembly_enable_disable(
sw_if_index=self.src_if.sw_if_index, enable_ip4=True)
self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=10)
self.sleep(.25)
self.vapi.ip_reassembly_set(timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=10000)
def tearDown(self):
super(TestIPv4Reassembly, self).tearDown()
- self.logger.debug(self.vapi.ppcli("show ip4-reassembly details"))
+
+ def show_commands_at_teardown(self):
+ self.logger.debug(self.vapi.ppcli("show ip4-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
@classmethod
def create_stream(cls, packet_sizes, packet_count=test_packet_count):
- """Create input packet stream for defined interface.
+ """Create input packet stream
:param list packet_sizes: Required packet sizes.
"""
def create_fragments(cls):
infos = cls._packet_infos
cls.pkt_infos = []
- for index, info in infos.iteritems():
+ for index, info in six.iteritems(infos):
p = info.data
- # cls.logger.debug(ppp("Packet:", p.__class__(str(p))))
+ # cls.logger.debug(ppp("Packet:",
+ # p.__class__(scapy.compat.raw(p))))
fragments_400 = fragment_rfc791(p, 400)
fragments_300 = fragment_rfc791(p, 300)
fragments_200 = [
self.logger.debug(ppp("Got packet:", packet))
ip = packet[IP]
udp = packet[UDP]
- payload_info = self.payload_to_info(str(packet[Raw]))
+ payload_info = self.payload_to_info(packet[Raw])
packet_index = payload_info.index
self.assertTrue(
packet_index not in dropped_packet_indexes,
self.verify_capture(packets)
self.src_if.assert_nothing_captured()
+ def test_long_fragment_chain(self):
+ """ long fragment chain """
+
+ error_cnt_str = \
+ "/err/ip4-full-reassembly-feature/fragment chain too long (drop)"
+
+ error_cnt = self.statistics.get_err_counter(error_cnt_str)
+
+ self.vapi.ip_reassembly_set(timeout_ms=100, max_reassemblies=1000,
+ max_reassembly_length=3,
+ expire_walk_interval_ms=50)
+
+ p1 = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IP(id=1000, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(b"X" * 1000))
+ p2 = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IP(id=1001, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(b"X" * 1000))
+ frags = fragment_rfc791(p1, 200) + fragment_rfc791(p2, 500)
+
+ self.pg_enable_capture()
+ self.src_if.add_stream(frags)
+ self.pg_start()
+
+ self.dst_if.get_capture(1)
+ self.assert_error_counter_equal(error_cnt_str, error_cnt + 1)
+
+ def test_5737(self):
+ """ fragment length + ip header size > 65535 """
+ self.vapi.cli("clear errors")
+ raw = b'''E\x00\x00\x88,\xf8\x1f\xfe@\x01\x98\x00\xc0\xa8\n-\xc0\xa8\n\
+\x01\x08\x00\xf0J\xed\xcb\xf1\xf5Test-group: IPv4.IPv4.ipv4-message.\
+Ethernet-Payload.IPv4-Packet.IPv4-Header.Fragment-Offset; Test-case: 5737'''
+ malformed_packet = (Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IP(raw))
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IP(id=1000, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(b"X" * 1000))
+ valid_fragments = fragment_rfc791(p, 400)
+
+ counter = "/err/ip4-full-reassembly-feature/malformed packets"
+ error_counter = self.statistics.get_err_counter(counter)
+ self.pg_enable_capture()
+ self.src_if.add_stream([malformed_packet] + valid_fragments)
+ self.pg_start()
+
+ self.dst_if.get_capture(1)
+ self.logger.debug(self.vapi.ppcli("show error"))
+ self.assertEqual(self.statistics.get_err_counter(counter),
+ error_counter + 1)
+
+ def test_44924(self):
+ """ compress tiny fragments """
+ packets = [(Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IP(id=24339, flags="MF", frag=0, ttl=64,
+ src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ ICMP(type="echo-request", code=0, id=0x1fe6, seq=0x2407) /
+ Raw(load='Test-group: IPv4')),
+ (Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IP(id=24339, flags="MF", frag=3, ttl=64,
+ src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ ICMP(type="echo-request", code=0, id=0x1fe6, seq=0x2407) /
+ Raw(load='.IPv4.Fragmentation.vali')),
+ (Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IP(id=24339, frag=6, ttl=64,
+ src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ ICMP(type="echo-request", code=0, id=0x1fe6, seq=0x2407) /
+ Raw(load='d; Test-case: 44924'))
+ ]
+
+ self.pg_enable_capture()
+ self.src_if.add_stream(packets)
+ self.pg_start()
+
+ self.dst_if.get_capture(1)
+
+ def test_frag_1(self):
+ """ fragment of size 1 """
+ self.vapi.cli("clear errors")
+ malformed_packets = [(Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IP(id=7, len=21, flags="MF", frag=0, ttl=64,
+ src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ ICMP(type="echo-request")),
+ (Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IP(id=7, len=21, frag=1, ttl=64,
+ src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ Raw(load=b'\x08')),
+ ]
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IP(id=1000, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(b"X" * 1000))
+ valid_fragments = fragment_rfc791(p, 400)
+
+ self.pg_enable_capture()
+ self.src_if.add_stream(malformed_packets + valid_fragments)
+ self.pg_start()
+
+ self.dst_if.get_capture(1)
+
+ self.assert_packet_counter_equal("ip4-full-reassembly-feature", 1)
+ # TODO remove above, uncomment below once clearing of counters
+ # is supported
+ # self.assert_packet_counter_equal(
+ # "/err/ip4-full-reassembly-feature/malformed packets", 1)
+
def test_random(self):
""" random order reassembly """
# new reassemblies will be started and packet generator will
# freak out when it detects unfreed buffers
zipped = zip(frags_300, frags_200)
- for i, j in zipped[:-1]:
+ for i, j in zipped:
fragments.extend(i)
fragments.extend(j)
- fragments.append(zipped[-1][0])
+ fragments.pop()
self.pg_enable_capture()
self.src_if.add_stream(fragments)
)
self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=3,
expire_walk_interval_ms=10000)
self.pg_enable_capture()
if len(frags_400) > 1)
self.vapi.ip_reassembly_set(timeout_ms=100, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=50)
self.pg_enable_capture()
if len(frags_400) > 1)
self.vapi.ip_reassembly_set(timeout_ms=1000, max_reassemblies=0,
+ max_reassembly_length=3,
expire_walk_interval_ms=10000)
self.pg_enable_capture()
self.src_if.assert_nothing_captured()
+class TestIPv4SVReassembly(VppTestCase):
+ """ IPv4 Shallow Virtual Reassembly """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestIPv4SVReassembly, cls).setUpClass()
+
+ cls.create_pg_interfaces([0, 1])
+ cls.src_if = cls.pg0
+ cls.dst_if = cls.pg1
+
+ # setup all interfaces
+ for i in cls.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ def setUp(self):
+ """ Test setup - force timeout on existing reassemblies """
+ super(TestIPv4SVReassembly, self).setUp()
+ self.vapi.ip_reassembly_enable_disable(
+ sw_if_index=self.src_if.sw_if_index, enable_ip4=True,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10)
+ self.sleep(.25)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10000)
+
+ def tearDown(self):
+ super(TestIPv4SVReassembly, self).tearDown()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+
+ def test_basic(self):
+ """ basic reassembly """
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IP(id=1, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ fragments = fragment_rfc791(p, payload_len/4)
+
+ # send fragment #2 - should be cached inside reassembly
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[1])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ self.dst_if.assert_nothing_captured()
+
+ # send fragment #1 - reassembly is finished now and both fragments
+ # forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[0])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ c = self.dst_if.get_capture(2)
+ for sent, recvd in zip([fragments[1], fragments[0]], c):
+ self.assertEqual(sent[IP].src, recvd[IP].src)
+ self.assertEqual(sent[IP].dst, recvd[IP].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ # send rest of fragments - should be immediately forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[2:])
+ self.pg_start()
+ c = self.dst_if.get_capture(len(fragments[2:]))
+ for sent, recvd in zip(fragments[2:], c):
+ self.assertEqual(sent[IP].src, recvd[IP].src)
+ self.assertEqual(sent[IP].dst, recvd[IP].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ def test_timeout(self):
+ """ reassembly timeout """
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IP(id=1, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ fragments = fragment_rfc791(p, payload_len/4)
+
+ self.vapi.ip_reassembly_set(
+ timeout_ms=100, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=50,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL)
+
+ # send fragments #2 and #1 - should be forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[0:2])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ c = self.dst_if.get_capture(2)
+ for sent, recvd in zip([fragments[1], fragments[0]], c):
+ self.assertEqual(sent[IP].src, recvd[IP].src)
+ self.assertEqual(sent[IP].dst, recvd[IP].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ # wait for cleanup
+ self.sleep(.25, "wait before sending rest of fragments")
+
+ # send rest of fragments - shouldn't be forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[2:])
+ self.pg_start()
+ self.dst_if.assert_nothing_captured()
+
+ def test_lru(self):
+ """ reassembly reuses LRU element """
+
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000, max_reassemblies=1,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10000)
+
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ packet_count = 10
+
+ fragments = [f
+ for i in range(packet_count)
+ for p in (Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IP(id=i, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ for f in fragment_rfc791(p, payload_len/4)]
+
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments)
+ self.pg_start()
+ c = self.dst_if.get_capture(len(fragments))
+ for sent, recvd in zip(fragments, c):
+ self.assertEqual(sent[IP].src, recvd[IP].src)
+ self.assertEqual(sent[IP].dst, recvd[IP].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+
+class TestIPv4MWReassembly(VppTestCase):
+ """ IPv4 Reassembly (multiple workers) """
+ worker_config = "workers %d" % worker_count
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestIPv4MWReassembly, cls).setUpClass()
+
+ cls.create_pg_interfaces(range(worker_count+1))
+ cls.src_if = cls.pg0
+ cls.send_ifs = cls.pg_interfaces[:-1]
+ cls.dst_if = cls.pg_interfaces[-1]
+
+ # setup all interfaces
+ for i in cls.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ # packets sizes reduced here because we are generating packets without
+ # Ethernet headers, which are added later (diff fragments go via
+ # different interfaces)
+ cls.packet_sizes = [64-len(Ether()), 512-len(Ether()),
+ 1518-len(Ether()), 9018-len(Ether())]
+ cls.padding = " abcdefghijklmn"
+ cls.create_stream(cls.packet_sizes)
+ cls.create_fragments()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestIPv4MWReassembly, cls).tearDownClass()
+
+ def setUp(self):
+ """ Test setup - force timeout on existing reassemblies """
+ super(TestIPv4MWReassembly, self).setUp()
+ for intf in self.send_ifs:
+ self.vapi.ip_reassembly_enable_disable(
+ sw_if_index=intf.sw_if_index, enable_ip4=True)
+ self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=10)
+ self.sleep(.25)
+ self.vapi.ip_reassembly_set(timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=10000)
+
+ def tearDown(self):
+ super(TestIPv4MWReassembly, self).tearDown()
+
+ def show_commands_at_teardown(self):
+ self.logger.debug(self.vapi.ppcli("show ip4-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+
+ @classmethod
+ def create_stream(cls, packet_sizes, packet_count=test_packet_count):
+ """Create input packet stream
+
+ :param list packet_sizes: Required packet sizes.
+ """
+ for i in range(0, packet_count):
+ info = cls.create_packet_info(cls.src_if, cls.src_if)
+ payload = cls.info_to_payload(info)
+ p = (IP(id=info.index, src=cls.src_if.remote_ip4,
+ dst=cls.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ size = packet_sizes[(i // 2) % len(packet_sizes)]
+ cls.extend_packet(p, size, cls.padding)
+ info.data = p
+
+ @classmethod
+ def create_fragments(cls):
+ infos = cls._packet_infos
+ cls.pkt_infos = []
+ for index, info in six.iteritems(infos):
+ p = info.data
+ # cls.logger.debug(ppp("Packet:",
+ # p.__class__(scapy.compat.raw(p))))
+ fragments_400 = fragment_rfc791(p, 400)
+ cls.pkt_infos.append((index, fragments_400))
+ cls.fragments_400 = [
+ x for (_, frags) in cls.pkt_infos for x in frags]
+ cls.logger.debug("Fragmented %s packets into %s 400-byte fragments, " %
+ (len(infos), len(cls.fragments_400)))
+
+ def verify_capture(self, capture, dropped_packet_indexes=[]):
+ """Verify captured packet stream.
+
+ :param list capture: Captured packet stream.
+ """
+ info = None
+ seen = set()
+ for packet in capture:
+ try:
+ self.logger.debug(ppp("Got packet:", packet))
+ ip = packet[IP]
+ udp = packet[UDP]
+ payload_info = self.payload_to_info(packet[Raw])
+ packet_index = payload_info.index
+ self.assertTrue(
+ packet_index not in dropped_packet_indexes,
+ ppp("Packet received, but should be dropped:", packet))
+ if packet_index in seen:
+ raise Exception(ppp("Duplicate packet received", packet))
+ seen.add(packet_index)
+ self.assertEqual(payload_info.dst, self.src_if.sw_if_index)
+ info = self._packet_infos[packet_index]
+ self.assertTrue(info is not None)
+ self.assertEqual(packet_index, info.index)
+ saved_packet = info.data
+ self.assertEqual(ip.src, saved_packet[IP].src)
+ self.assertEqual(ip.dst, saved_packet[IP].dst)
+ self.assertEqual(udp.payload, saved_packet[UDP].payload)
+ except Exception:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+ for index in self._packet_infos:
+ self.assertTrue(index in seen or index in dropped_packet_indexes,
+ "Packet with packet_index %d not received" % index)
+
+ def send_packets(self, packets):
+ for counter in range(worker_count):
+ if 0 == len(packets[counter]):
+ continue
+ send_if = self.send_ifs[counter]
+ send_if.add_stream(
+ (Ether(dst=send_if.local_mac, src=send_if.remote_mac) / x
+ for x in packets[counter]),
+ worker=counter)
+ self.pg_start()
+
+ def test_worker_conflict(self):
+ """ 1st and FO=0 fragments on different workers """
+
+ # in first wave we send fragments which don't start at offset 0
+ # then we send fragments with offset 0 on a different thread
+ # then the rest of packets on a random thread
+ first_packets = [[] for n in range(worker_count)]
+ second_packets = [[] for n in range(worker_count)]
+ rest_of_packets = [[] for n in range(worker_count)]
+ for (_, p) in self.pkt_infos:
+ wi = randrange(worker_count)
+ second_packets[wi].append(p[0])
+ if len(p) <= 1:
+ continue
+ wi2 = wi
+ while wi2 == wi:
+ wi2 = randrange(worker_count)
+ first_packets[wi2].append(p[1])
+ wi3 = randrange(worker_count)
+ rest_of_packets[wi3].extend(p[2:])
+
+ self.pg_enable_capture()
+ self.send_packets(first_packets)
+ self.send_packets(second_packets)
+ self.send_packets(rest_of_packets)
+
+ packets = self.dst_if.get_capture(len(self.pkt_infos))
+ self.verify_capture(packets)
+ for send_if in self.send_ifs:
+ send_if.assert_nothing_captured()
+
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ self.logger.debug(self.vapi.ppcli("show ip4-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.vapi.cli("clear trace")
+
+ self.pg_enable_capture()
+ self.send_packets(first_packets)
+ self.send_packets(second_packets)
+ self.send_packets(rest_of_packets)
+
+ packets = self.dst_if.get_capture(len(self.pkt_infos))
+ self.verify_capture(packets)
+ for send_if in self.send_ifs:
+ send_if.assert_nothing_captured()
+
+
class TestIPv6Reassembly(VppTestCase):
""" IPv6 Reassembly """
cls.create_stream(cls.packet_sizes)
cls.create_fragments()
+ @classmethod
+ def tearDownClass(cls):
+ super(TestIPv6Reassembly, cls).tearDownClass()
+
def setUp(self):
""" Test setup - force timeout on existing reassemblies """
super(TestIPv6Reassembly, self).setUp()
self.vapi.ip_reassembly_enable_disable(
sw_if_index=self.src_if.sw_if_index, enable_ip6=True)
self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=10, is_ip6=1)
self.sleep(.25)
self.vapi.ip_reassembly_set(timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=10000, is_ip6=1)
- self.logger.debug(self.vapi.ppcli("show ip6-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show ip6-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
def tearDown(self):
super(TestIPv6Reassembly, self).tearDown()
- self.logger.debug(self.vapi.ppcli("show ip6-reassembly details"))
+
+ def show_commands_at_teardown(self):
+ self.logger.debug(self.vapi.ppcli("show ip6-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
@classmethod
def create_stream(cls, packet_sizes, packet_count=test_packet_count):
def create_fragments(cls):
infos = cls._packet_infos
cls.pkt_infos = []
- for index, info in infos.iteritems():
+ for index, info in six.iteritems(infos):
p = info.data
- # cls.logger.debug(ppp("Packet:", p.__class__(str(p))))
+ # cls.logger.debug(ppp("Packet:",
+ # p.__class__(scapy.compat.raw(p))))
fragments_400 = fragment_rfc8200(p, info.index, 400)
fragments_300 = fragment_rfc8200(p, info.index, 300)
cls.pkt_infos.append((index, fragments_400, fragments_300))
self.logger.debug(ppp("Got packet:", packet))
ip = packet[IPv6]
udp = packet[UDP]
- payload_info = self.payload_to_info(str(packet[Raw]))
+ payload_info = self.payload_to_info(packet[Raw])
packet_index = payload_info.index
self.assertTrue(
packet_index not in dropped_packet_indexes,
self.verify_capture(packets)
self.src_if.assert_nothing_captured()
+ def test_buffer_boundary(self):
+ """ fragment header crossing buffer boundary """
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IPv6(src=self.src_if.remote_ip6,
+ dst=self.src_if.local_ip6) /
+ IPv6ExtHdrHopByHop(
+ options=[HBHOptUnknown(otype=0xff, optlen=0)] * 1000) /
+ IPv6ExtHdrFragment(m=1) /
+ UDP(sport=1234, dport=5678) /
+ Raw())
+ self.pg_enable_capture()
+ self.src_if.add_stream([p])
+ self.pg_start()
+ self.src_if.assert_nothing_captured()
+ self.dst_if.assert_nothing_captured()
+
def test_reversed(self):
""" reverse order reassembly """
self.verify_capture(packets)
self.src_if.assert_nothing_captured()
+ def test_long_fragment_chain(self):
+ """ long fragment chain """
+
+ error_cnt_str = \
+ "/err/ip6-full-reassembly-feature/fragment chain too long (drop)"
+
+ error_cnt = self.statistics.get_err_counter(error_cnt_str)
+
+ self.vapi.ip_reassembly_set(timeout_ms=100, max_reassemblies=1000,
+ max_reassembly_length=3,
+ expire_walk_interval_ms=50, is_ip6=1)
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IPv6(src=self.src_if.remote_ip6,
+ dst=self.dst_if.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(b"X" * 1000))
+ frags = fragment_rfc8200(p, 1, 300) + fragment_rfc8200(p, 2, 500)
+
+ self.pg_enable_capture()
+ self.src_if.add_stream(frags)
+ self.pg_start()
+
+ self.dst_if.get_capture(1)
+ self.assert_error_counter_equal(error_cnt_str, error_cnt + 1)
+
def test_overlap1(self):
""" overlapping fragments case #1 """
# new reassemblies will be started and packet generator will
# freak out when it detects unfreed buffers
zipped = zip(frags_400, frags_300)
- for i, j in zipped[:-1]:
+ for i, j in zipped:
fragments.extend(i)
fragments.extend(j)
- fragments.append(zipped[-1][0])
+ fragments.pop()
dropped_packet_indexes = set(
index for (index, _, frags) in self.pkt_infos if len(frags) > 1
)
self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=3,
expire_walk_interval_ms=10000, is_ip6=1)
self.pg_enable_capture()
if len(frags_400) > 1)
self.vapi.ip_reassembly_set(timeout_ms=100, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=50)
self.vapi.ip_reassembly_set(timeout_ms=100, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=50, is_ip6=1)
self.pg_enable_capture()
if len(frags_400) > 1)
self.vapi.ip_reassembly_set(timeout_ms=1000, max_reassemblies=0,
+ max_reassembly_length=3,
expire_walk_interval_ms=10000, is_ip6=1)
self.pg_enable_capture()
Raw())
self.extend_packet(p, 1000, self.padding)
fragments = fragment_rfc8200(p, 1, 500)
- bad_fragment = p.__class__(str(fragments[1]))
+ bad_fragment = p.__class__(scapy.compat.raw(fragments[1]))
bad_fragment[IPv6ExtHdrFragment].nh = 59
bad_fragment[IPv6ExtHdrFragment].offset = 0
self.pg_enable_capture()
self.assert_equal(icmp[ICMPv6ParamProblem].code, 0, "ICMP code")
+class TestIPv6MWReassembly(VppTestCase):
+ """ IPv6 Reassembly (multiple workers) """
+ worker_config = "workers %d" % worker_count
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestIPv6MWReassembly, cls).setUpClass()
+
+ cls.create_pg_interfaces(range(worker_count+1))
+ cls.src_if = cls.pg0
+ cls.send_ifs = cls.pg_interfaces[:-1]
+ cls.dst_if = cls.pg_interfaces[-1]
+
+ # setup all interfaces
+ for i in cls.pg_interfaces:
+ i.admin_up()
+ i.config_ip6()
+ i.resolve_ndp()
+
+ # packets sizes reduced here because we are generating packets without
+ # Ethernet headers, which are added later (diff fragments go via
+ # different interfaces)
+ cls.packet_sizes = [64-len(Ether()), 512-len(Ether()),
+ 1518-len(Ether()), 9018-len(Ether())]
+ cls.padding = " abcdefghijklmn"
+ cls.create_stream(cls.packet_sizes)
+ cls.create_fragments()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestIPv6MWReassembly, cls).tearDownClass()
+
+ def setUp(self):
+ """ Test setup - force timeout on existing reassemblies """
+ super(TestIPv6MWReassembly, self).setUp()
+ for intf in self.send_ifs:
+ self.vapi.ip_reassembly_enable_disable(
+ sw_if_index=intf.sw_if_index, enable_ip6=True)
+ self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=10, is_ip6=1)
+ self.sleep(.25)
+ self.vapi.ip_reassembly_set(timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=1000, is_ip6=1)
+
+ def tearDown(self):
+ super(TestIPv6MWReassembly, self).tearDown()
+
+ def show_commands_at_teardown(self):
+ self.logger.debug(self.vapi.ppcli("show ip6-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+
+ @classmethod
+ def create_stream(cls, packet_sizes, packet_count=test_packet_count):
+ """Create input packet stream
+
+ :param list packet_sizes: Required packet sizes.
+ """
+ for i in range(0, packet_count):
+ info = cls.create_packet_info(cls.src_if, cls.src_if)
+ payload = cls.info_to_payload(info)
+ p = (IPv6(src=cls.src_if.remote_ip6,
+ dst=cls.dst_if.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ size = packet_sizes[(i // 2) % len(packet_sizes)]
+ cls.extend_packet(p, size, cls.padding)
+ info.data = p
+
+ @classmethod
+ def create_fragments(cls):
+ infos = cls._packet_infos
+ cls.pkt_infos = []
+ for index, info in six.iteritems(infos):
+ p = info.data
+ # cls.logger.debug(ppp("Packet:",
+ # p.__class__(scapy.compat.raw(p))))
+ fragments_400 = fragment_rfc8200(p, index, 400)
+ cls.pkt_infos.append((index, fragments_400))
+ cls.fragments_400 = [
+ x for (_, frags) in cls.pkt_infos for x in frags]
+ cls.logger.debug("Fragmented %s packets into %s 400-byte fragments, " %
+ (len(infos), len(cls.fragments_400)))
+
+ def verify_capture(self, capture, dropped_packet_indexes=[]):
+ """Verify captured packet strea .
+
+ :param list capture: Captured packet stream.
+ """
+ info = None
+ seen = set()
+ for packet in capture:
+ try:
+ self.logger.debug(ppp("Got packet:", packet))
+ ip = packet[IPv6]
+ udp = packet[UDP]
+ payload_info = self.payload_to_info(packet[Raw])
+ packet_index = payload_info.index
+ self.assertTrue(
+ packet_index not in dropped_packet_indexes,
+ ppp("Packet received, but should be dropped:", packet))
+ if packet_index in seen:
+ raise Exception(ppp("Duplicate packet received", packet))
+ seen.add(packet_index)
+ self.assertEqual(payload_info.dst, self.src_if.sw_if_index)
+ info = self._packet_infos[packet_index]
+ self.assertTrue(info is not None)
+ self.assertEqual(packet_index, info.index)
+ saved_packet = info.data
+ self.assertEqual(ip.src, saved_packet[IPv6].src)
+ self.assertEqual(ip.dst, saved_packet[IPv6].dst)
+ self.assertEqual(udp.payload, saved_packet[UDP].payload)
+ except Exception:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+ for index in self._packet_infos:
+ self.assertTrue(index in seen or index in dropped_packet_indexes,
+ "Packet with packet_index %d not received" % index)
+
+ def send_packets(self, packets):
+ for counter in range(worker_count):
+ if 0 == len(packets[counter]):
+ continue
+ send_if = self.send_ifs[counter]
+ send_if.add_stream(
+ (Ether(dst=send_if.local_mac, src=send_if.remote_mac) / x
+ for x in packets[counter]),
+ worker=counter)
+ self.pg_start()
+
+ def test_worker_conflict(self):
+ """ 1st and FO=0 fragments on different workers """
+
+ # in first wave we send fragments which don't start at offset 0
+ # then we send fragments with offset 0 on a different thread
+ # then the rest of packets on a random thread
+ first_packets = [[] for n in range(worker_count)]
+ second_packets = [[] for n in range(worker_count)]
+ rest_of_packets = [[] for n in range(worker_count)]
+ for (_, p) in self.pkt_infos:
+ wi = randrange(worker_count)
+ second_packets[wi].append(p[0])
+ if len(p) <= 1:
+ continue
+ wi2 = wi
+ while wi2 == wi:
+ wi2 = randrange(worker_count)
+ first_packets[wi2].append(p[1])
+ wi3 = randrange(worker_count)
+ rest_of_packets[wi3].extend(p[2:])
+
+ self.pg_enable_capture()
+ self.send_packets(first_packets)
+ self.send_packets(second_packets)
+ self.send_packets(rest_of_packets)
+
+ packets = self.dst_if.get_capture(len(self.pkt_infos))
+ self.verify_capture(packets)
+ for send_if in self.send_ifs:
+ send_if.assert_nothing_captured()
+
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ self.logger.debug(self.vapi.ppcli("show ip6-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.vapi.cli("clear trace")
+
+ self.pg_enable_capture()
+ self.send_packets(first_packets)
+ self.send_packets(second_packets)
+ self.send_packets(rest_of_packets)
+
+ packets = self.dst_if.get_capture(len(self.pkt_infos))
+ self.verify_capture(packets)
+ for send_if in self.send_ifs:
+ send_if.assert_nothing_captured()
+
+
+class TestIPv6SVReassembly(VppTestCase):
+ """ IPv6 Shallow Virtual Reassembly """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestIPv6SVReassembly, cls).setUpClass()
+
+ cls.create_pg_interfaces([0, 1])
+ cls.src_if = cls.pg0
+ cls.dst_if = cls.pg1
+
+ # setup all interfaces
+ for i in cls.pg_interfaces:
+ i.admin_up()
+ i.config_ip6()
+ i.resolve_ndp()
+
+ def setUp(self):
+ """ Test setup - force timeout on existing reassemblies """
+ super(TestIPv6SVReassembly, self).setUp()
+ self.vapi.ip_reassembly_enable_disable(
+ sw_if_index=self.src_if.sw_if_index, enable_ip6=True,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10, is_ip6=1)
+ self.sleep(.25)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10000, is_ip6=1)
+
+ def tearDown(self):
+ super(TestIPv6SVReassembly, self).tearDown()
+ self.logger.debug(self.vapi.ppcli("show ip6-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+
+ def test_basic(self):
+ """ basic reassembly """
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ fragments = fragment_rfc8200(p, 1, payload_len/4)
+
+ # send fragment #2 - should be cached inside reassembly
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[1])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip6-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ self.dst_if.assert_nothing_captured()
+
+ # send fragment #1 - reassembly is finished now and both fragments
+ # forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[0])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip6-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ c = self.dst_if.get_capture(2)
+ for sent, recvd in zip([fragments[1], fragments[0]], c):
+ self.assertEqual(sent[IPv6].src, recvd[IPv6].src)
+ self.assertEqual(sent[IPv6].dst, recvd[IPv6].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ # send rest of fragments - should be immediately forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[2:])
+ self.pg_start()
+ c = self.dst_if.get_capture(len(fragments[2:]))
+ for sent, recvd in zip(fragments[2:], c):
+ self.assertEqual(sent[IPv6].src, recvd[IPv6].src)
+ self.assertEqual(sent[IPv6].dst, recvd[IPv6].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ def test_timeout(self):
+ """ reassembly timeout """
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ fragments = fragment_rfc8200(p, 1, payload_len/4)
+
+ self.vapi.ip_reassembly_set(
+ timeout_ms=100, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=50,
+ is_ip6=1,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL)
+
+ # send fragments #2 and #1 - should be forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[0:2])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ c = self.dst_if.get_capture(2)
+ for sent, recvd in zip([fragments[1], fragments[0]], c):
+ self.assertEqual(sent[IPv6].src, recvd[IPv6].src)
+ self.assertEqual(sent[IPv6].dst, recvd[IPv6].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ # wait for cleanup
+ self.sleep(.25, "wait before sending rest of fragments")
+
+ # send rest of fragments - shouldn't be forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[2:])
+ self.pg_start()
+ self.dst_if.assert_nothing_captured()
+
+ def test_lru(self):
+ """ reassembly reuses LRU element """
+
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000, max_reassemblies=1,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ is_ip6=1, expire_walk_interval_ms=10000)
+
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ packet_count = 10
+
+ fragments = [f
+ for i in range(packet_count)
+ for p in (Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IPv6(src=self.src_if.remote_ip6,
+ dst=self.dst_if.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ for f in fragment_rfc8200(p, i, payload_len/4)]
+
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments)
+ self.pg_start()
+ c = self.dst_if.get_capture(len(fragments))
+ for sent, recvd in zip(fragments, c):
+ self.assertEqual(sent[IPv6].src, recvd[IPv6].src)
+ self.assertEqual(sent[IPv6].dst, recvd[IPv6].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+
+class TestIPv4ReassemblyLocalNode(VppTestCase):
+ """ IPv4 Reassembly for packets coming to ip4-local node """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestIPv4ReassemblyLocalNode, cls).setUpClass()
+
+ cls.create_pg_interfaces([0])
+ cls.src_dst_if = cls.pg0
+
+ # setup all interfaces
+ for i in cls.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ cls.padding = " abcdefghijklmn"
+ cls.create_stream()
+ cls.create_fragments()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestIPv4ReassemblyLocalNode, cls).tearDownClass()
+
+ def setUp(self):
+ """ Test setup - force timeout on existing reassemblies """
+ super(TestIPv4ReassemblyLocalNode, self).setUp()
+ self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=10)
+ self.sleep(.25)
+ self.vapi.ip_reassembly_set(timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=10000)
+
+ def tearDown(self):
+ super(TestIPv4ReassemblyLocalNode, self).tearDown()
+
+ def show_commands_at_teardown(self):
+ self.logger.debug(self.vapi.ppcli("show ip4-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+
+ @classmethod
+ def create_stream(cls, packet_count=test_packet_count):
+ """Create input packet stream for defined interface.
+
+ :param list packet_sizes: Required packet sizes.
+ """
+ for i in range(0, packet_count):
+ info = cls.create_packet_info(cls.src_dst_if, cls.src_dst_if)
+ payload = cls.info_to_payload(info)
+ p = (Ether(dst=cls.src_dst_if.local_mac,
+ src=cls.src_dst_if.remote_mac) /
+ IP(id=info.index, src=cls.src_dst_if.remote_ip4,
+ dst=cls.src_dst_if.local_ip4) /
+ ICMP(type='echo-request', id=1234) /
+ Raw(payload))
+ cls.extend_packet(p, 1518, cls.padding)
+ info.data = p
+
+ @classmethod
+ def create_fragments(cls):
+ infos = cls._packet_infos
+ cls.pkt_infos = []
+ for index, info in six.iteritems(infos):
+ p = info.data
+ # cls.logger.debug(ppp("Packet:",
+ # p.__class__(scapy.compat.raw(p))))
+ fragments_300 = fragment_rfc791(p, 300)
+ cls.pkt_infos.append((index, fragments_300))
+ cls.fragments_300 = [x for (_, frags) in cls.pkt_infos for x in frags]
+ cls.logger.debug("Fragmented %s packets into %s 300-byte fragments" %
+ (len(infos), len(cls.fragments_300)))
+
+ def verify_capture(self, capture):
+ """Verify captured packet stream.
+
+ :param list capture: Captured packet stream.
+ """
+ info = None
+ seen = set()
+ for packet in capture:
+ try:
+ self.logger.debug(ppp("Got packet:", packet))
+ ip = packet[IP]
+ icmp = packet[ICMP]
+ payload_info = self.payload_to_info(packet[Raw])
+ packet_index = payload_info.index
+ if packet_index in seen:
+ raise Exception(ppp("Duplicate packet received", packet))
+ seen.add(packet_index)
+ self.assertEqual(payload_info.dst, self.src_dst_if.sw_if_index)
+ info = self._packet_infos[packet_index]
+ self.assertIsNotNone(info)
+ self.assertEqual(packet_index, info.index)
+ saved_packet = info.data
+ self.assertEqual(ip.src, saved_packet[IP].dst)
+ self.assertEqual(ip.dst, saved_packet[IP].src)
+ self.assertEqual(icmp.type, 0) # echo reply
+ self.assertEqual(icmp.id, saved_packet[ICMP].id)
+ self.assertEqual(icmp.payload, saved_packet[ICMP].payload)
+ except Exception:
+ self.logger.error(ppp("Unexpected or invalid packet:", packet))
+ raise
+ for index in self._packet_infos:
+ self.assertIn(index, seen,
+ "Packet with packet_index %d not received" % index)
+
+ def test_reassembly(self):
+ """ basic reassembly """
+
+ self.pg_enable_capture()
+ self.src_dst_if.add_stream(self.fragments_300)
+ self.pg_start()
+
+ packets = self.src_dst_if.get_capture(len(self.pkt_infos))
+ self.verify_capture(packets)
+
+ # run it all again to verify correctness
+ self.pg_enable_capture()
+ self.src_dst_if.add_stream(self.fragments_300)
+ self.pg_start()
+
+ packets = self.src_dst_if.get_capture(len(self.pkt_infos))
+ self.verify_capture(packets)
+
+
class TestFIFReassembly(VppTestCase):
""" Fragments in fragments reassembly """
cls.packet_sizes = [64, 512, 1518, 9018]
cls.padding = " abcdefghijklmn"
+ @classmethod
+ def tearDownClass(cls):
+ super(TestFIFReassembly, cls).tearDownClass()
+
def setUp(self):
""" Test setup - force timeout on existing reassemblies """
super(TestFIFReassembly, self).setUp()
sw_if_index=self.dst_if.sw_if_index, enable_ip4=True,
enable_ip6=True)
self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=10)
self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=10, is_ip6=1)
self.sleep(.25)
self.vapi.ip_reassembly_set(timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=10000)
self.vapi.ip_reassembly_set(timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
expire_walk_interval_ms=10000, is_ip6=1)
def tearDown(self):
- self.logger.debug(self.vapi.ppcli("show ip4-reassembly details"))
- self.logger.debug(self.vapi.ppcli("show ip6-reassembly details"))
super(TestFIFReassembly, self).tearDown()
+ def show_commands_at_teardown(self):
+ self.logger.debug(self.vapi.ppcli("show ip4-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show ip6-full-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+
def verify_capture(self, capture, ip_class, dropped_packet_indexes=[]):
"""Verify captured packet stream.
self.logger.debug(ppp("Got packet:", packet))
ip = packet[ip_class]
udp = packet[UDP]
- payload_info = self.payload_to_info(str(packet[Raw]))
+ payload_info = self.payload_to_info(packet[Raw])
packet_index = payload_info.index
self.assertTrue(
packet_index not in dropped_packet_indexes,
self.extend_packet(p, size, self.padding)
info.data = p[IP] # use only IP part, without ethernet header
- fragments = [x for _, p in self._packet_infos.iteritems()
+ fragments = [x for _, p in six.iteritems(self._packet_infos)
for x in fragment_rfc791(p.data, 400)]
encapped_fragments = \
# it shared for multiple test cases
self.tun_ip6 = "1002::1"
- self.gre6 = VppGre6Interface(self, self.src_if.local_ip6, self.tun_ip6)
+ self.gre6 = VppGreInterface(self, self.src_if.local_ip6, self.tun_ip6)
self.gre6.add_vpp_config()
self.gre6.admin_up()
self.gre6.config_ip6()
sw_if_index=self.gre6.sw_if_index, enable_ip6=True)
self.route6 = VppIpRoute(self, self.tun_ip6, 128,
- [VppRoutePath(self.src_if.remote_ip6,
- self.src_if.sw_if_index,
- proto=DpoProto.DPO_PROTO_IP6)],
- is_ip6=1)
+ [VppRoutePath(
+ self.src_if.remote_ip6,
+ self.src_if.sw_if_index)])
self.route6.add_vpp_config()
self.reset_packet_infos()
self.extend_packet(p, size, self.padding)
info.data = p[IPv6] # use only IPv6 part, without ethernet header
- fragments = [x for _, i in self._packet_infos.iteritems()
+ fragments = [x for _, i in six.iteritems(self._packet_infos)
for x in fragment_rfc8200(
i.data, i.index, 400)]
Code Review / vpp.git / blobdiff