X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=test%2Ftest_reassembly.py;h=6a356a00b0c2a885aa26ad5ac964424652dc261c;hb=097fa66b9;hp=7bca794c5c020f205cbf65aa6dbef726280274d7;hpb=cae98b72c97e1ea95e06068ae9923a5f3a21938d;p=vpp.git diff --git a/test/test_reassembly.py b/test/test_reassembly.py index 7bca794c5c0..6a356a00b0c 100644 --- a/test/test_reassembly.py +++ b/test/test_reassembly.py @@ -1,26 +1,204 @@ #!/usr/bin/env python +from random import shuffle import six import unittest -from random import shuffle - -from framework import VppTestCase, VppTestRunner +from parameterized import parameterized +import scapy.compat from scapy.packet import Raw from scapy.layers.l2 import Ether, GRE from scapy.layers.inet import IP, UDP, ICMP -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 framework import VppTestCase, VppTestRunner +from util import ppp, fragment_rfc791, fragment_rfc8200 +from vpp_gre_interface import VppGreInterface from vpp_ip import DpoProto -from vpp_ip_route import VppIpRoute, VppRoutePath +from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathProto # 35 is enough to have >257 400-byte fragments test_packet_count = 35 +# +# +_scapy_ip_family_types = (IP, IPv6) + + +def validate_scapy_ip_family(scapy_ip_family): + + if scapy_ip_family not in _scapy_ip_family_types: + raise ValueError("'scapy_ip_family' must be of type: %s. Got %s" % + (_scapy_ip_family_types, scapy_ip_family)) + + +class TestIPReassemblyMixin(object): + + def verify_capture(self, scapy_ip_family, capture, + dropped_packet_indexes=None): + """Verify captured packet stream. + + :param list capture: Captured packet stream. + """ + validate_scapy_ip_family(scapy_ip_family) + + if dropped_packet_indexes is None: + dropped_packet_indexes = [] + info = None + seen = set() + for packet in capture: + try: + self.logger.debug(ppp("Got packet:", packet)) + ip = packet[scapy_ip_family] + 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[scapy_ip_family].src) + self.assertEqual(ip.dst, saved_packet[scapy_ip_family].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 test_disabled(self, scapy_ip_family, stream, + dropped_packet_indexes): + """ reassembly disabled """ + validate_scapy_ip_family(scapy_ip_family) + is_ip6 = 1 if scapy_ip_family == IPv6 else 0 + + self.vapi.ip_reassembly_set(timeout_ms=1000, max_reassemblies=0, + max_reassembly_length=1000, + expire_walk_interval_ms=10000, + is_ip6=is_ip6) + + self.pg_enable_capture() + self.src_if.add_stream(stream) + self.pg_start() + + packets = self.dst_if.get_capture( + len(self.pkt_infos) - len(dropped_packet_indexes)) + self.verify_capture(scapy_ip_family, packets, dropped_packet_indexes) + self.src_if.assert_nothing_captured() + + def test_duplicates(self, scapy_ip_family, stream): + """ duplicate fragments """ + validate_scapy_ip_family(scapy_ip_family) + + self.pg_enable_capture() + self.src_if.add_stream(stream) + self.pg_start() + + packets = self.dst_if.get_capture(len(self.pkt_infos)) + self.verify_capture(scapy_ip_family, packets) + self.src_if.assert_nothing_captured() + + def test_random(self, scapy_ip_family, stream): + """ random order reassembly """ + validate_scapy_ip_family(scapy_ip_family) + + fragments = list(stream) + shuffle(fragments) -class TestIPv4Reassembly(VppTestCase): + self.pg_enable_capture() + self.src_if.add_stream(fragments) + self.pg_start() + + packets = self.dst_if.get_capture(len(self.packet_infos)) + self.verify_capture(scapy_ip_family, packets) + self.src_if.assert_nothing_captured() + + # run it all again to verify correctness + self.pg_enable_capture() + self.src_if.add_stream(fragments) + self.pg_start() + + packets = self.dst_if.get_capture(len(self.packet_infos)) + self.verify_capture(scapy_ip_family, packets) + self.src_if.assert_nothing_captured() + + def test_reassembly(self, scapy_ip_family, stream): + """ basic reassembly """ + validate_scapy_ip_family(scapy_ip_family) + + self.pg_enable_capture() + self.src_if.add_stream(stream) + self.pg_start() + + packets = self.dst_if.get_capture(len(self.pkt_infos)) + self.verify_capture(scapy_ip_family, packets) + self.src_if.assert_nothing_captured() + + # run it all again to verify correctness + self.pg_enable_capture() + self.src_if.add_stream(stream) + self.pg_start() + + packets = self.dst_if.get_capture(len(self.pkt_infos)) + self.verify_capture(scapy_ip_family, packets) + self.src_if.assert_nothing_captured() + + def test_reversed(self, scapy_ip_family, stream): + """ reverse order reassembly """ + validate_scapy_ip_family(scapy_ip_family) + + fragments = list(stream) + fragments.reverse() + + self.pg_enable_capture() + self.src_if.add_stream(fragments) + self.pg_start() + + packets = self.dst_if.get_capture(len(self.packet_infos)) + self.verify_capture(scapy_ip_family, packets) + self.src_if.assert_nothing_captured() + + # run it all again to verify correctness + self.pg_enable_capture() + self.src_if.add_stream(fragments) + self.pg_start() + + packets = self.dst_if.get_capture(len(self.packet_infos)) + self.verify_capture(scapy_ip_family, packets) + self.src_if.assert_nothing_captured() + + def test_timeout_inline(self, scapy_ip_family, stream, + dropped_packet_indexes): + """ timeout (inline) """ + validate_scapy_ip_family(scapy_ip_family) + is_ip6 = 1 if scapy_ip_family == IPv6 else 0 + + self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000, + max_reassembly_length=1000, + expire_walk_interval_ms=10000, + is_ip6=is_ip6) + + self.pg_enable_capture() + self.src_if.add_stream(stream) + self.pg_start() + + packets = self.dst_if.get_capture( + len(self.pkt_infos) - len(dropped_packet_indexes)) + self.verify_capture(scapy_ip_family, packets, + dropped_packet_indexes) + + +class TestIPv4Reassembly(TestIPReassemblyMixin, VppTestCase): """ IPv4 Reassembly """ @classmethod @@ -43,19 +221,27 @@ 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() + + def show_commands_at_teardown(self): self.logger.debug(self.vapi.ppcli("show ip4-reassembly details")) self.logger.debug(self.vapi.ppcli("show buffers")) @@ -83,7 +269,8 @@ class TestIPv4Reassembly(VppTestCase): cls.pkt_infos = [] 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 = [ @@ -101,83 +288,53 @@ class TestIPv4Reassembly(VppTestCase): (len(infos), len(cls.fragments_400), len(cls.fragments_300), len(cls.fragments_200))) - 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(str(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 test_reassembly(self): + @parameterized.expand([(IP, None)]) + def test_reassembly(self, family, stream): """ basic reassembly """ + stream = self.__class__.fragments_200 + super(TestIPv4Reassembly, self).test_reassembly(family, stream) - self.pg_enable_capture() - self.src_if.add_stream(self.fragments_200) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() + @parameterized.expand([(IP, None)]) + def test_reversed(self, family, stream): + """ reverse order reassembly """ + stream = self.__class__.fragments_200 + super(TestIPv4Reassembly, self).test_reversed(family, stream) - # run it all again to verify correctness - self.pg_enable_capture() - self.src_if.add_stream(self.fragments_200) - self.pg_start() + @parameterized.expand([(IP, None)]) + def test_random(self, family, stream): + stream = self.__class__.fragments_200 + super(TestIPv4Reassembly, self).test_random(family, stream) - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() + def test_long_fragment_chain(self): + """ long fragment chain """ - def test_reversed(self): - """ reverse order reassembly """ + error_cnt_str = \ + "/err/ip4-reassembly-feature/fragment chain too long (drop)" - fragments = list(self.fragments_200) - fragments.reverse() + error_cnt = self.statistics.get_err_counter(error_cnt_str) - self.pg_enable_capture() - self.src_if.add_stream(fragments) - self.pg_start() + self.vapi.ip_reassembly_set(timeout_ms=100, max_reassemblies=1000, + max_reassembly_length=3, + expire_walk_interval_ms=50) - packets = self.dst_if.get_capture(len(self.packet_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() + 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("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("X" * 1000)) + frags = fragment_rfc791(p1, 200) + fragment_rfc791(p2, 500) - # run it all again to verify correctness self.pg_enable_capture() - self.src_if.add_stream(fragments) + self.src_if.add_stream(frags) self.pg_start() - packets = self.dst_if.get_capture(len(self.packet_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() + 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 """ @@ -275,45 +432,16 @@ class TestIPv4Reassembly(VppTestCase): # self.assert_packet_counter_equal( # "/err/ip4-reassembly-feature/malformed packets", 1) - def test_random(self): - """ random order reassembly """ - - fragments = list(self.fragments_200) - shuffle(fragments) - - self.pg_enable_capture() - self.src_if.add_stream(fragments) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.packet_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() - - # run it all again to verify correctness - self.pg_enable_capture() - self.src_if.add_stream(fragments) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.packet_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() - - def test_duplicates(self): + @parameterized.expand([(IP, None)]) + def test_duplicates(self, family, stream): """ duplicate fragments """ - fragments = [ + # IPv4 uses 4 fields in pkt_infos, IPv6 uses 3. x for (_, frags, _, _) in self.pkt_infos for x in frags for _ in range(0, min(2, len(frags))) ] - - self.pg_enable_capture() - self.src_if.add_stream(fragments) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() + super(TestIPv4Reassembly, self).test_duplicates(family, fragments) def test_overlap1(self): """ overlapping fragments case #1 """ @@ -332,7 +460,7 @@ class TestIPv4Reassembly(VppTestCase): self.pg_start() packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) + self.verify_capture(IP, packets) self.src_if.assert_nothing_captured() # run it all to verify correctness @@ -341,7 +469,7 @@ class TestIPv4Reassembly(VppTestCase): self.pg_start() packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) + self.verify_capture(IP, packets) self.src_if.assert_nothing_captured() def test_overlap2(self): @@ -357,17 +485,17 @@ class TestIPv4Reassembly(VppTestCase): # 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.pg_start() packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) + self.verify_capture(IP, packets) self.src_if.assert_nothing_captured() # run it all to verify correctness @@ -376,26 +504,20 @@ class TestIPv4Reassembly(VppTestCase): self.pg_start() packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) + self.verify_capture(IP, packets) self.src_if.assert_nothing_captured() - def test_timeout_inline(self): + @parameterized.expand([(IP, None, None)]) + def test_timeout_inline(self, family, stream, dropped_packet_indexes): """ timeout (inline) """ + stream = self.fragments_400 dropped_packet_indexes = set( index for (index, frags, _, _) in self.pkt_infos if len(frags) > 1 ) + super(TestIPv4Reassembly, self).test_timeout_inline( + family, stream, dropped_packet_indexes) - self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000, - expire_walk_interval_ms=10000) - - self.pg_enable_capture() - self.src_if.add_stream(self.fragments_400) - self.pg_start() - - packets = self.dst_if.get_capture( - len(self.pkt_infos) - len(dropped_packet_indexes)) - self.verify_capture(packets, dropped_packet_indexes) self.src_if.assert_nothing_captured() def test_timeout_cleanup(self): @@ -417,6 +539,7 @@ class TestIPv4Reassembly(VppTestCase): 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() @@ -430,30 +553,22 @@ class TestIPv4Reassembly(VppTestCase): packets = self.dst_if.get_capture( len(self.pkt_infos) - len(dropped_packet_indexes)) - self.verify_capture(packets, dropped_packet_indexes) + self.verify_capture(IP, packets, dropped_packet_indexes) self.src_if.assert_nothing_captured() - def test_disabled(self): + @parameterized.expand([(IP, None, None)]) + def test_disabled(self, family, stream, dropped_packet_indexes): """ reassembly disabled """ + stream = self.__class__.fragments_400 dropped_packet_indexes = set( index for (index, frags_400, _, _) in self.pkt_infos if len(frags_400) > 1) + super(TestIPv4Reassembly, self).test_disabled( + family, stream, dropped_packet_indexes) - self.vapi.ip_reassembly_set(timeout_ms=1000, max_reassemblies=0, - expire_walk_interval_ms=10000) - - self.pg_enable_capture() - self.src_if.add_stream(self.fragments_400) - self.pg_start() - - packets = self.dst_if.get_capture( - len(self.pkt_infos) - len(dropped_packet_indexes)) - self.verify_capture(packets, dropped_packet_indexes) - self.src_if.assert_nothing_captured() - -class TestIPv6Reassembly(VppTestCase): +class TestIPv6Reassembly(TestIPReassemblyMixin, VppTestCase): """ IPv6 Reassembly """ @classmethod @@ -476,21 +591,29 @@ class TestIPv6Reassembly(VppTestCase): 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 buffers")) def tearDown(self): super(TestIPv6Reassembly, self).tearDown() + + def show_commands_at_teardown(self): self.logger.debug(self.vapi.ppcli("show ip6-reassembly details")) self.logger.debug(self.vapi.ppcli("show buffers")) @@ -518,7 +641,8 @@ class TestIPv6Reassembly(VppTestCase): cls.pkt_infos = [] 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)) @@ -531,126 +655,64 @@ class TestIPv6Reassembly(VppTestCase): (len(infos), len(cls.fragments_400), len(cls.fragments_300))) - 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(str(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 test_reassembly(self): + @parameterized.expand([(IPv6, None)]) + def test_reassembly(self, family, stream): """ basic reassembly """ + stream = self.__class__.fragments_400 + super(TestIPv6Reassembly, self).test_reassembly(family, stream) - self.pg_enable_capture() - self.src_if.add_stream(self.fragments_400) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() - - # run it all again to verify correctness - self.pg_enable_capture() - self.src_if.add_stream(self.fragments_400) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() - - def test_reversed(self): + @parameterized.expand([(IPv6, None)]) + def test_reversed(self, family, stream): """ reverse order reassembly """ + stream = self.__class__.fragments_400 + super(TestIPv6Reassembly, self).test_reversed(family, stream) - fragments = list(self.fragments_400) - fragments.reverse() - - self.pg_enable_capture() - self.src_if.add_stream(fragments) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() - - # run it all again to verify correctness - self.pg_enable_capture() - self.src_if.add_stream(fragments) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() - - def test_random(self): + @parameterized.expand([(IPv6, None)]) + def test_random(self, family, stream): """ random order reassembly """ + stream = self.__class__.fragments_400 + super(TestIPv6Reassembly, self).test_random(family, stream) - fragments = list(self.fragments_400) - shuffle(fragments) - - self.pg_enable_capture() - self.src_if.add_stream(fragments) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() - - # run it all again to verify correctness - self.pg_enable_capture() - self.src_if.add_stream(fragments) - self.pg_start() - - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() - - def test_duplicates(self): + @parameterized.expand([(IPv6, None)]) + def test_duplicates(self, family, stream): """ duplicate fragments """ fragments = [ + # IPv4 uses 4 fields in pkt_infos, IPv6 uses 3. x for (_, frags, _) in self.pkt_infos for x in frags for _ in range(0, min(2, len(frags))) ] + super(TestIPv6Reassembly, self).test_duplicates(family, fragments) + + def test_long_fragment_chain(self): + """ long fragment chain """ + + error_cnt_str = \ + "/err/ip6-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("X" * 1000)) + frags = fragment_rfc8200(p, 1, 300) + fragment_rfc8200(p, 2, 500) self.pg_enable_capture() - self.src_if.add_stream(fragments) + self.src_if.add_stream(frags) self.pg_start() - packets = self.dst_if.get_capture(len(self.pkt_infos)) - self.verify_capture(packets) - self.src_if.assert_nothing_captured() + 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 """ + """ overlapping fragments case #1 (differs from IP test case)""" fragments = [] for _, frags_400, frags_300 in self.pkt_infos: @@ -671,11 +733,11 @@ class TestIPv6Reassembly(VppTestCase): packets = self.dst_if.get_capture( len(self.pkt_infos) - len(dropped_packet_indexes)) - self.verify_capture(packets, dropped_packet_indexes) + self.verify_capture(IPv6, packets, dropped_packet_indexes) self.src_if.assert_nothing_captured() def test_overlap2(self): - """ overlapping fragments case #2 """ + """ overlapping fragments case #2 (differs from IP test case)""" fragments = [] for _, frags_400, frags_300 in self.pkt_infos: @@ -687,10 +749,10 @@ class TestIPv6Reassembly(VppTestCase): # 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 @@ -702,26 +764,20 @@ class TestIPv6Reassembly(VppTestCase): packets = self.dst_if.get_capture( len(self.pkt_infos) - len(dropped_packet_indexes)) - self.verify_capture(packets, dropped_packet_indexes) + self.verify_capture(IPv6, packets, dropped_packet_indexes) self.src_if.assert_nothing_captured() - def test_timeout_inline(self): + @parameterized.expand([(IPv6, None, None)]) + def test_timeout_inline(self, family, stream, dropped_packets_index): """ timeout (inline) """ + stream = self.__class__.fragments_400 dropped_packet_indexes = set( index for (index, frags, _) in self.pkt_infos if len(frags) > 1 ) + super(TestIPv6Reassembly, self).test_timeout_inline( + family, stream, dropped_packet_indexes) - self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000, - expire_walk_interval_ms=10000, is_ip6=1) - - self.pg_enable_capture() - self.src_if.add_stream(self.fragments_400) - self.pg_start() - - packets = self.dst_if.get_capture( - len(self.pkt_infos) - len(dropped_packet_indexes)) - self.verify_capture(packets, dropped_packet_indexes) pkts = self.src_if.get_capture( expected_count=len(dropped_packet_indexes)) for icmp in pkts: @@ -749,9 +805,11 @@ class TestIPv6Reassembly(VppTestCase): 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() @@ -765,7 +823,7 @@ class TestIPv6Reassembly(VppTestCase): packets = self.dst_if.get_capture( len(self.pkt_infos) - len(dropped_packet_indexes)) - self.verify_capture(packets, dropped_packet_indexes) + self.verify_capture(IPv6, packets, dropped_packet_indexes) pkts = self.src_if.get_capture( expected_count=len(dropped_packet_indexes)) for icmp in pkts: @@ -774,23 +832,16 @@ class TestIPv6Reassembly(VppTestCase): self.assertIn(icmp[IPv6ExtHdrFragment].id, dropped_packet_indexes) dropped_packet_indexes.remove(icmp[IPv6ExtHdrFragment].id) - def test_disabled(self): + @parameterized.expand([(IPv6, None, None)]) + def test_disabled(self, family, stream, dropped_packet_indexes): """ reassembly disabled """ + stream = self.__class__.fragments_400 dropped_packet_indexes = set( index for (index, frags_400, _) in self.pkt_infos if len(frags_400) > 1) - - self.vapi.ip_reassembly_set(timeout_ms=1000, max_reassemblies=0, - expire_walk_interval_ms=10000, is_ip6=1) - - self.pg_enable_capture() - self.src_if.add_stream(self.fragments_400) - self.pg_start() - - packets = self.dst_if.get_capture( - len(self.pkt_infos) - len(dropped_packet_indexes)) - self.verify_capture(packets, dropped_packet_indexes) + super(TestIPv6Reassembly, self).test_disabled( + family, stream, dropped_packet_indexes) self.src_if.assert_nothing_captured() def test_missing_upper(self): @@ -802,7 +853,7 @@ class TestIPv6Reassembly(VppTestCase): 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() @@ -872,17 +923,25 @@ class TestIPv4ReassemblyLocalNode(VppTestCase): 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-reassembly details")) self.logger.debug(self.vapi.ppcli("show buffers")) @@ -910,7 +969,8 @@ class TestIPv4ReassemblyLocalNode(VppTestCase): cls.pkt_infos = [] 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_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] @@ -929,7 +989,7 @@ class TestIPv4ReassemblyLocalNode(VppTestCase): self.logger.debug(ppp("Got packet:", packet)) ip = packet[IP] icmp = packet[ICMP] - payload_info = self.payload_to_info(str(packet[Raw])) + 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)) @@ -990,6 +1050,10 @@ class TestFIFReassembly(VppTestCase): 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() @@ -1000,20 +1064,26 @@ class TestFIFReassembly(VppTestCase): 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): + super(TestFIFReassembly, self).tearDown() + + def show_commands_at_teardown(self): self.logger.debug(self.vapi.ppcli("show ip4-reassembly details")) self.logger.debug(self.vapi.ppcli("show ip6-reassembly details")) self.logger.debug(self.vapi.ppcli("show buffers")) - super(TestFIFReassembly, self).tearDown() def verify_capture(self, capture, ip_class, dropped_packet_indexes=[]): """Verify captured packet stream. @@ -1027,7 +1097,7 @@ class TestFIFReassembly(VppTestCase): 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, @@ -1124,7 +1194,7 @@ class TestFIFReassembly(VppTestCase): # 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() @@ -1133,10 +1203,9 @@ class TestFIFReassembly(VppTestCase): 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()