from scapy.packet import Raw
from scapy.layers.l2 import Ether, GRE
from scapy.layers.inet import IP, UDP, ICMP, icmptypes
-from scapy.layers.inet6 import HBHOptUnknown, ICMPv6ParamProblem,\
- ICMPv6TimeExceeded, IPv6, IPv6ExtHdrFragment,\
- IPv6ExtHdrHopByHop, IPv6ExtHdrDestOpt, PadN, ICMPv6EchoRequest,\
- ICMPv6EchoReply
+from scapy.layers.inet6 import (
+ HBHOptUnknown,
+ ICMPv6ParamProblem,
+ ICMPv6TimeExceeded,
+ IPv6,
+ IPv6ExtHdrFragment,
+ IPv6ExtHdrHopByHop,
+ IPv6ExtHdrDestOpt,
+ PadN,
+ ICMPv6EchoRequest,
+ ICMPv6EchoReply,
+)
from framework import VppTestCase, VppTestRunner
from util import ppp, ppc, fragment_rfc791, fragment_rfc8200
from vpp_gre_interface import VppGreInterface
class TestIPv4Reassembly(VppTestCase):
- """ IPv4 Reassembly """
+ """IPv4 Reassembly"""
@classmethod
def setUpClass(cls):
super().tearDownClass()
def setUp(self):
- """ Test setup - force timeout on existing reassemblies """
+ """Test setup - force timeout on existing reassemblies"""
super().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.virtual_sleep(.25)
- self.vapi.ip_reassembly_set(timeout_ms=1000000, max_reassemblies=1000,
- max_reassembly_length=1000,
- expire_walk_interval_ms=10000)
+ 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.virtual_sleep(0.25)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000,
+ max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=10000,
+ )
def tearDown(self):
self.vapi.ip_reassembly_enable_disable(
- sw_if_index=self.src_if.sw_if_index, enable_ip4=False)
+ sw_if_index=self.src_if.sw_if_index, enable_ip4=False
+ )
super().tearDown()
def show_commands_at_teardown(self):
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 = (Ether(dst=cls.src_if.local_mac, src=cls.src_if.remote_mac) /
- IP(id=info.index, src=cls.src_if.remote_ip4,
- dst=cls.dst_if.remote_ip4) /
- UDP(sport=1234, dport=5678) /
- Raw(payload))
+ p = (
+ Ether(dst=cls.src_if.local_mac, src=cls.src_if.remote_mac)
+ / 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
# p.__class__(scapy.compat.raw(p))))
fragments_400 = fragment_rfc791(p, 400)
fragments_300 = fragment_rfc791(p, 300)
- fragments_200 = [
- x for f in fragments_400 for x in fragment_rfc791(f, 200)]
- cls.pkt_infos.append(
- (index, fragments_400, fragments_300, fragments_200))
- cls.fragments_400 = [
- x for (_, frags, _, _) in cls.pkt_infos for x in frags]
- cls.fragments_300 = [
- x for (_, _, frags, _) in cls.pkt_infos for x in frags]
- cls.fragments_200 = [
- x for (_, _, _, frags) in cls.pkt_infos for x in frags]
- cls.logger.debug("Fragmented %s packets into %s 400-byte fragments, "
- "%s 300-byte fragments and %s 200-byte fragments" %
- (len(infos), len(cls.fragments_400),
- len(cls.fragments_300), len(cls.fragments_200)))
+ fragments_200 = [x for f in fragments_400 for x in fragment_rfc791(f, 200)]
+ cls.pkt_infos.append((index, fragments_400, fragments_300, fragments_200))
+ cls.fragments_400 = [x for (_, frags, _, _) in cls.pkt_infos for x in frags]
+ cls.fragments_300 = [x for (_, _, frags, _) in cls.pkt_infos for x in frags]
+ cls.fragments_200 = [x for (_, _, _, frags) in cls.pkt_infos for x in frags]
+ cls.logger.debug(
+ "Fragmented %s packets into %s 400-byte fragments, "
+ "%s 300-byte fragments and %s 200-byte fragments"
+ % (
+ 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.
packet_index = payload_info.index
self.assertTrue(
packet_index not in dropped_packet_indexes,
- ppp("Packet received, but should be dropped:", packet))
+ 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.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)
+ self.assertTrue(
+ index in seen or index in dropped_packet_indexes,
+ "Packet with packet_index %d not received" % index,
+ )
def test_reassembly(self):
- """ basic reassembly """
+ """basic reassembly"""
self.pg_enable_capture()
self.src_if.add_stream(self.fragments_200)
self.src_if.assert_nothing_captured()
def test_verify_clear_trace_mid_reassembly(self):
- """ verify clear trace works mid-reassembly """
+ """verify clear trace works mid-reassembly"""
self.pg_enable_capture()
self.src_if.add_stream(self.fragments_200[0:-1])
self.verify_capture(packets)
def test_reversed(self):
- """ reverse order reassembly """
+ """reverse order reassembly"""
fragments = list(self.fragments_200)
fragments.reverse()
self.src_if.assert_nothing_captured()
def test_long_fragment_chain(self):
- """ long fragment chain """
+ """long fragment chain"""
- error_cnt_str = \
+ 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))
+ 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.assert_error_counter_equal(error_cnt_str, error_cnt + 1)
def test_5737(self):
- """ fragment length + ip header size > 65535 """
+ """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\
+ 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))
+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"
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)
+ 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'))
- ]
+ """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.dst_if.get_capture(1)
def test_frag_1(self):
- """ fragment of size 1 """
+ """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))
+ 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()
# "/err/ip4-full-reassembly-feature/malformed packets", 1)
def test_random(self):
- """ random order reassembly """
+ """random order reassembly"""
fragments = list(self.fragments_200)
shuffle(fragments)
self.src_if.assert_nothing_captured()
def test_duplicates(self):
- """ duplicate fragments """
+ """duplicate fragments"""
fragments = [
- x for (_, frags, _, _) in self.pkt_infos
+ x
+ for (_, frags, _, _) in self.pkt_infos
for x in frags
for _ in range(0, min(2, len(frags)))
]
self.src_if.assert_nothing_captured()
def test_overlap1(self):
- """ overlapping fragments case #1 """
+ """overlapping fragments case #1"""
fragments = []
for _, _, frags_300, frags_200 in self.pkt_infos:
self.src_if.assert_nothing_captured()
def test_overlap2(self):
- """ overlapping fragments case #2 """
+ """overlapping fragments case #2"""
fragments = []
for _, _, frags_300, frags_200 in self.pkt_infos:
self.src_if.assert_nothing_captured()
def test_timeout_inline(self):
- """ timeout (inline) """
+ """timeout (inline)"""
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)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=0,
+ max_reassemblies=1000,
+ max_reassembly_length=3,
+ 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))
+ 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):
- """ timeout (cleanup) """
+ """timeout (cleanup)"""
# whole packets + fragmented packets sans last fragment
fragments = [
- x for (_, frags_400, _, _) in self.pkt_infos
- for x in frags_400[:-1 if len(frags_400) > 1 else None]
+ x
+ for (_, frags_400, _, _) in self.pkt_infos
+ for x in frags_400[: -1 if len(frags_400) > 1 else None]
]
# last fragments for fragmented packets
- fragments2 = [frags_400[-1]
- for (_, frags_400, _, _) in self.pkt_infos
- if len(frags_400) > 1]
+ fragments2 = [
+ frags_400[-1]
+ for (_, frags_400, _, _) in self.pkt_infos
+ if len(frags_400) > 1
+ ]
dropped_packet_indexes = set(
- index for (index, frags_400, _, _) in self.pkt_infos
- if len(frags_400) > 1)
+ index for (index, frags_400, _, _) in self.pkt_infos 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,
+ )
self.pg_enable_capture()
self.src_if.add_stream(fragments)
self.pg_start()
- self.virtual_sleep(.25, "wait before sending rest of fragments")
+ self.virtual_sleep(0.25, "wait before sending rest of fragments")
self.src_if.add_stream(fragments2)
self.pg_start()
packets = self.dst_if.get_capture(
- len(self.pkt_infos) - len(dropped_packet_indexes))
+ len(self.pkt_infos) - len(dropped_packet_indexes)
+ )
self.verify_capture(packets, dropped_packet_indexes)
self.src_if.assert_nothing_captured()
def test_disabled(self):
- """ reassembly disabled """
+ """reassembly disabled"""
dropped_packet_indexes = set(
- index for (index, frags_400, _, _) in self.pkt_infos
- if len(frags_400) > 1)
+ 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,
- max_reassembly_length=3,
- expire_walk_interval_ms=10000)
+ 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.add_stream(self.fragments_400)
self.pg_start()
packets = self.dst_if.get_capture(
- len(self.pkt_infos) - len(dropped_packet_indexes))
+ len(self.pkt_infos) - len(dropped_packet_indexes)
+ )
self.verify_capture(packets, dropped_packet_indexes)
self.src_if.assert_nothing_captured()
def test_local_enable_disable(self):
- """ local reassembly enabled/disable """
+ """local reassembly enabled/disable"""
self.vapi.ip_reassembly_enable_disable(
- sw_if_index=self.src_if.sw_if_index, enable_ip4=False)
+ sw_if_index=self.src_if.sw_if_index, enable_ip4=False
+ )
self.vapi.ip_local_reass_enable_disable(enable_ip4=True)
- p = (Ether(src=self.src_if.remote_mac, dst=self.src_if.local_mac) /
- IP(src=self.src_if.remote_ip4, dst=self.src_if.local_ip4) /
- ICMP(id=1234, type='echo-request') /
- Raw('x' * 1000))
+ p = (
+ Ether(src=self.src_if.remote_mac, dst=self.src_if.local_mac)
+ / IP(src=self.src_if.remote_ip4, dst=self.src_if.local_ip4)
+ / ICMP(id=1234, type="echo-request")
+ / Raw("x" * 1000)
+ )
frags = fragment_rfc791(p, 400)
r = self.send_and_expect(self.src_if, frags, self.src_if, n_rx=1)[0]
self.assertEqual(1234, r[ICMP].id)
- self.assertEqual(icmptypes[r[ICMP].type], 'echo-reply')
+ self.assertEqual(icmptypes[r[ICMP].type], "echo-reply")
self.vapi.ip_local_reass_enable_disable()
self.send_and_assert_no_replies(self.src_if, frags)
class TestIPv4SVReassembly(VppTestCase):
- """ IPv4 Shallow Virtual Reassembly """
+ """IPv4 Shallow Virtual Reassembly"""
@classmethod
def setUpClass(cls):
i.resolve_arp()
def setUp(self):
- """ Test setup - force timeout on existing reassemblies """
+ """Test setup - force timeout on existing reassemblies"""
super().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)
+ 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,
+ 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.virtual_sleep(.25)
+ expire_walk_interval_ms=10,
+ )
+ self.virtual_sleep(0.25)
self.vapi.ip_reassembly_set(
- timeout_ms=1000000, max_reassemblies=1000,
+ 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)
+ expire_walk_interval_ms=10000,
+ )
def tearDown(self):
super().tearDown()
self.logger.debug(self.vapi.ppcli("show buffers"))
def test_basic(self):
- """ basic reassembly """
+ """basic reassembly"""
payload_len = 1000
payload = ""
counter = 0
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)
+ 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.assertEqual(sent[Raw].payload, recvd[Raw].payload)
def test_verify_clear_trace_mid_reassembly(self):
- """ verify clear trace works mid-reassembly """
+ """verify clear trace works mid-reassembly"""
payload_len = 1000
payload = ""
counter = 0
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)
+ 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.pg_enable_capture()
self.src_if.add_stream(fragments[1])
self.dst_if.get_capture(len(fragments[2:]))
def test_timeout(self):
- """ reassembly timeout """
+ """reassembly timeout"""
payload_len = 1000
payload = ""
counter = 0
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)
+ 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,
+ 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)
+ 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.assertEqual(sent[Raw].payload, recvd[Raw].payload)
# wait for cleanup
- self.virtual_sleep(.25, "wait before sending rest of fragments")
+ self.virtual_sleep(0.25, "wait before sending rest of fragments")
# send rest of fragments - shouldn't be forwarded
self.pg_enable_capture()
self.dst_if.assert_nothing_captured()
def test_lru(self):
- """ reassembly reuses LRU element """
+ """reassembly reuses LRU element"""
self.vapi.ip_reassembly_set(
- timeout_ms=1000000, max_reassemblies=1,
+ 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)
+ expire_walk_interval_ms=10000,
+ )
payload_len = 1000
payload = ""
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)]
+ 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)
def send_mixed_and_verify_capture(self, traffic):
stream = []
for t in traffic:
- for c in range(t['count']):
+ for c in range(t["count"]):
stream.append(
- (Ether(dst=self.src_if.local_mac,
- src=self.src_if.remote_mac) /
- IP(id=self.counter,
- flags=t['flags'],
- src=self.src_if.remote_ip4,
- dst=self.dst_if.remote_ip4) /
- UDP(sport=1234, dport=5678) /
- Raw("abcdef")))
+ (
+ Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac)
+ / IP(
+ id=self.counter,
+ flags=t["flags"],
+ src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4,
+ )
+ / UDP(sport=1234, dport=5678)
+ / Raw("abcdef")
+ )
+ )
self.counter = self.counter + 1
self.pg_enable_capture()
self.dst_if.get_capture(len(stream))
def test_mixed(self):
- """ mixed traffic correctly passes through SVR """
+ """mixed traffic correctly passes through SVR"""
self.counter = 1
- self.send_mixed_and_verify_capture([{'count': 1, 'flags': ''}])
- self.send_mixed_and_verify_capture([{'count': 2, 'flags': ''}])
- self.send_mixed_and_verify_capture([{'count': 3, 'flags': ''}])
- self.send_mixed_and_verify_capture([{'count': 8, 'flags': ''}])
- self.send_mixed_and_verify_capture([{'count': 257, 'flags': ''}])
+ self.send_mixed_and_verify_capture([{"count": 1, "flags": ""}])
+ self.send_mixed_and_verify_capture([{"count": 2, "flags": ""}])
+ self.send_mixed_and_verify_capture([{"count": 3, "flags": ""}])
+ self.send_mixed_and_verify_capture([{"count": 8, "flags": ""}])
+ self.send_mixed_and_verify_capture([{"count": 257, "flags": ""}])
- self.send_mixed_and_verify_capture([{'count': 1, 'flags': 'MF'}])
- self.send_mixed_and_verify_capture([{'count': 2, 'flags': 'MF'}])
- self.send_mixed_and_verify_capture([{'count': 3, 'flags': 'MF'}])
- self.send_mixed_and_verify_capture([{'count': 8, 'flags': 'MF'}])
- self.send_mixed_and_verify_capture([{'count': 257, 'flags': 'MF'}])
+ self.send_mixed_and_verify_capture([{"count": 1, "flags": "MF"}])
+ self.send_mixed_and_verify_capture([{"count": 2, "flags": "MF"}])
+ self.send_mixed_and_verify_capture([{"count": 3, "flags": "MF"}])
+ self.send_mixed_and_verify_capture([{"count": 8, "flags": "MF"}])
+ self.send_mixed_and_verify_capture([{"count": 257, "flags": "MF"}])
self.send_mixed_and_verify_capture(
- [{'count': 1, 'flags': ''}, {'count': 1, 'flags': 'MF'}])
+ [{"count": 1, "flags": ""}, {"count": 1, "flags": "MF"}]
+ )
self.send_mixed_and_verify_capture(
- [{'count': 2, 'flags': ''}, {'count': 2, 'flags': 'MF'}])
+ [{"count": 2, "flags": ""}, {"count": 2, "flags": "MF"}]
+ )
self.send_mixed_and_verify_capture(
- [{'count': 3, 'flags': ''}, {'count': 3, 'flags': 'MF'}])
+ [{"count": 3, "flags": ""}, {"count": 3, "flags": "MF"}]
+ )
self.send_mixed_and_verify_capture(
- [{'count': 8, 'flags': ''}, {'count': 8, 'flags': 'MF'}])
+ [{"count": 8, "flags": ""}, {"count": 8, "flags": "MF"}]
+ )
self.send_mixed_and_verify_capture(
- [{'count': 129, 'flags': ''}, {'count': 129, 'flags': 'MF'}])
+ [{"count": 129, "flags": ""}, {"count": 129, "flags": "MF"}]
+ )
self.send_mixed_and_verify_capture(
- [{'count': 1, 'flags': ''}, {'count': 1, 'flags': 'MF'},
- {'count': 1, 'flags': ''}, {'count': 1, 'flags': 'MF'}])
+ [
+ {"count": 1, "flags": ""},
+ {"count": 1, "flags": "MF"},
+ {"count": 1, "flags": ""},
+ {"count": 1, "flags": "MF"},
+ ]
+ )
self.send_mixed_and_verify_capture(
- [{'count': 2, 'flags': ''}, {'count': 2, 'flags': 'MF'},
- {'count': 2, 'flags': ''}, {'count': 2, 'flags': 'MF'}])
+ [
+ {"count": 2, "flags": ""},
+ {"count": 2, "flags": "MF"},
+ {"count": 2, "flags": ""},
+ {"count": 2, "flags": "MF"},
+ ]
+ )
self.send_mixed_and_verify_capture(
- [{'count': 3, 'flags': ''}, {'count': 3, 'flags': 'MF'},
- {'count': 3, 'flags': ''}, {'count': 3, 'flags': 'MF'}])
+ [
+ {"count": 3, "flags": ""},
+ {"count": 3, "flags": "MF"},
+ {"count": 3, "flags": ""},
+ {"count": 3, "flags": "MF"},
+ ]
+ )
self.send_mixed_and_verify_capture(
- [{'count': 8, 'flags': ''}, {'count': 8, 'flags': 'MF'},
- {'count': 8, 'flags': ''}, {'count': 8, 'flags': 'MF'}])
+ [
+ {"count": 8, "flags": ""},
+ {"count": 8, "flags": "MF"},
+ {"count": 8, "flags": ""},
+ {"count": 8, "flags": "MF"},
+ ]
+ )
self.send_mixed_and_verify_capture(
- [{'count': 65, 'flags': ''}, {'count': 65, 'flags': 'MF'},
- {'count': 65, 'flags': ''}, {'count': 65, 'flags': 'MF'}])
+ [
+ {"count": 65, "flags": ""},
+ {"count": 65, "flags": "MF"},
+ {"count": 65, "flags": ""},
+ {"count": 65, "flags": "MF"},
+ ]
+ )
class TestIPv4MWReassembly(VppTestCase):
- """ IPv4 Reassembly (multiple workers) """
+ """IPv4 Reassembly (multiple workers)"""
+
vpp_worker_count = 3
@classmethod
def setUpClass(cls):
super().setUpClass()
- cls.create_pg_interfaces(range(cls.vpp_worker_count+1))
+ cls.create_pg_interfaces(range(cls.vpp_worker_count + 1))
cls.src_if = cls.pg0
cls.send_ifs = cls.pg_interfaces[:-1]
cls.dst_if = cls.pg_interfaces[-1]
# 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.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()
super().tearDownClass()
def setUp(self):
- """ Test setup - force timeout on existing reassemblies """
+ """Test setup - force timeout on existing reassemblies"""
super().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.virtual_sleep(.25)
- self.vapi.ip_reassembly_set(timeout_ms=1000000, max_reassemblies=1000,
- max_reassembly_length=1000,
- expire_walk_interval_ms=10000)
+ 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.virtual_sleep(0.25)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000,
+ max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=10000,
+ )
def tearDown(self):
for intf in self.send_ifs:
self.vapi.ip_reassembly_enable_disable(
- sw_if_index=intf.sw_if_index, enable_ip4=False)
+ sw_if_index=intf.sw_if_index, enable_ip4=False
+ )
super().tearDown()
def show_commands_at_teardown(self):
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))
+ 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
# 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)))
+ 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.
packet_index = payload_info.index
self.assertTrue(
packet_index not in dropped_packet_indexes,
- ppp("Packet received, but should be dropped:", packet))
+ 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.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)
+ 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(self.vpp_worker_count):
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)
+ (
+ 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 """
+ """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
class TestIPv6Reassembly(VppTestCase):
- """ IPv6 Reassembly """
+ """IPv6 Reassembly"""
@classmethod
def setUpClass(cls):
super().tearDownClass()
def setUp(self):
- """ Test setup - force timeout on existing reassemblies """
+ """Test setup - force timeout on existing reassemblies"""
super().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.virtual_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)
+ 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.virtual_sleep(0.25)
+ 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-full-reassembly details"))
self.logger.debug(self.vapi.ppcli("show buffers"))
def tearDown(self):
self.vapi.ip_reassembly_enable_disable(
- sw_if_index=self.src_if.sw_if_index, enable_ip6=False)
+ sw_if_index=self.src_if.sw_if_index, enable_ip6=False
+ )
super().tearDown()
def show_commands_at_teardown(self):
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 = (Ether(dst=cls.src_if.local_mac, src=cls.src_if.remote_mac) /
- IPv6(src=cls.src_if.remote_ip6,
- dst=cls.dst_if.remote_ip6) /
- UDP(sport=1234, dport=5678) /
- Raw(payload))
+ p = (
+ Ether(dst=cls.src_if.local_mac, src=cls.src_if.remote_mac)
+ / 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
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))
- cls.fragments_400 = [
- x for _, frags, _ in cls.pkt_infos for x in frags]
- cls.fragments_300 = [
- x for _, _, frags in cls.pkt_infos for x in frags]
- cls.logger.debug("Fragmented %s packets into %s 400-byte fragments, "
- "and %s 300-byte fragments" %
- (len(infos), len(cls.fragments_400),
- len(cls.fragments_300)))
+ cls.fragments_400 = [x for _, frags, _ in cls.pkt_infos for x in frags]
+ cls.fragments_300 = [x for _, _, frags in cls.pkt_infos for x in frags]
+ cls.logger.debug(
+ "Fragmented %s packets into %s 400-byte fragments, "
+ "and %s 300-byte fragments"
+ % (len(infos), len(cls.fragments_400), len(cls.fragments_300))
+ )
def verify_capture(self, capture, dropped_packet_indexes=[]):
"""Verify captured packet strea .
packet_index = payload_info.index
self.assertTrue(
packet_index not in dropped_packet_indexes,
- ppp("Packet received, but should be dropped:", packet))
+ 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.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)
+ self.assertTrue(
+ index in seen or index in dropped_packet_indexes,
+ "Packet with packet_index %d not received" % index,
+ )
def test_reassembly(self):
- """ basic reassembly """
+ """basic reassembly"""
self.pg_enable_capture()
self.src_if.add_stream(self.fragments_400)
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())
+ """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.dst_if.assert_nothing_captured()
def test_verify_clear_trace_mid_reassembly(self):
- """ verify clear trace works mid-reassembly """
+ """verify clear trace works mid-reassembly"""
self.pg_enable_capture()
self.src_if.add_stream(self.fragments_400[0:-1])
self.verify_capture(packets)
def test_reversed(self):
- """ reverse order reassembly """
+ """reverse order reassembly"""
fragments = list(self.fragments_400)
fragments.reverse()
self.src_if.assert_nothing_captured()
def test_random(self):
- """ random order reassembly """
+ """random order reassembly"""
fragments = list(self.fragments_400)
shuffle(fragments)
self.src_if.assert_nothing_captured()
def test_duplicates(self):
- """ duplicate fragments """
+ """duplicate fragments"""
fragments = [
- x for (_, frags, _) in self.pkt_infos
+ x
+ for (_, frags, _) in self.pkt_infos
for x in frags
for _ in range(0, min(2, len(frags)))
]
self.src_if.assert_nothing_captured()
def test_long_fragment_chain(self):
- """ long fragment chain """
+ """long fragment chain"""
- error_cnt_str = \
+ 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)
+ 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))
+ 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.assert_error_counter_equal(error_cnt_str, error_cnt + 1)
def test_overlap1(self):
- """ overlapping fragments case #1 """
+ """overlapping fragments case #1"""
fragments = []
for _, frags_400, frags_300 in self.pkt_infos:
self.pg_start()
packets = self.dst_if.get_capture(
- len(self.pkt_infos) - len(dropped_packet_indexes))
+ len(self.pkt_infos) - len(dropped_packet_indexes)
+ )
self.verify_capture(packets, dropped_packet_indexes)
self.src_if.assert_nothing_captured()
def test_overlap2(self):
- """ overlapping fragments case #2 """
+ """overlapping fragments case #2"""
fragments = []
for _, frags_400, frags_300 in self.pkt_infos:
self.pg_start()
packets = self.dst_if.get_capture(
- len(self.pkt_infos) - len(dropped_packet_indexes))
+ len(self.pkt_infos) - len(dropped_packet_indexes)
+ )
self.verify_capture(packets, dropped_packet_indexes)
self.src_if.assert_nothing_captured()
def test_timeout_inline(self):
- """ timeout (inline) """
+ """timeout (inline)"""
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.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()
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))
+ len(self.pkt_infos) - len(dropped_packet_indexes)
+ )
self.verify_capture(packets, dropped_packet_indexes)
pkts = self.src_if._get_capture(1)
for icmp in pkts:
dropped_packet_indexes.remove(icmp[IPv6ExtHdrFragment].id)
def test_timeout_cleanup(self):
- """ timeout (cleanup) """
+ """timeout (cleanup)"""
# whole packets + fragmented packets sans last fragment
fragments = [
- x for (_, frags_400, _) in self.pkt_infos
- for x in frags_400[:-1 if len(frags_400) > 1 else None]
+ x
+ for (_, frags_400, _) in self.pkt_infos
+ for x in frags_400[: -1 if len(frags_400) > 1 else None]
]
# last fragments for fragmented packets
- fragments2 = [frags_400[-1]
- for (_, frags_400, _) in self.pkt_infos
- if len(frags_400) > 1]
+ fragments2 = [
+ frags_400[-1] for (_, frags_400, _) in self.pkt_infos if len(frags_400) > 1
+ ]
dropped_packet_indexes = set(
- index for (index, frags_400, _) in self.pkt_infos
- if len(frags_400) > 1)
+ index for (index, frags_400, _) in self.pkt_infos 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,
+ )
- self.vapi.ip_reassembly_set(timeout_ms=100, max_reassemblies=1000,
- max_reassembly_length=1000,
- expire_walk_interval_ms=50, is_ip6=1)
+ 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()
self.src_if.add_stream(fragments)
self.pg_start()
- self.virtual_sleep(.25, "wait before sending rest of fragments")
+ self.virtual_sleep(0.25, "wait before sending rest of fragments")
self.src_if.add_stream(fragments2)
self.pg_start()
packets = self.dst_if.get_capture(
- len(self.pkt_infos) - len(dropped_packet_indexes))
+ len(self.pkt_infos) - len(dropped_packet_indexes)
+ )
self.verify_capture(packets, dropped_packet_indexes)
pkts = self.src_if._get_capture(1)
for icmp in pkts:
dropped_packet_indexes.remove(icmp[IPv6ExtHdrFragment].id)
def test_disabled(self):
- """ reassembly disabled """
+ """reassembly disabled"""
dropped_packet_indexes = set(
- index for (index, frags_400, _) in self.pkt_infos
- if len(frags_400) > 1)
+ 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,
- max_reassembly_length=3,
- expire_walk_interval_ms=10000, is_ip6=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()
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))
+ len(self.pkt_infos) - len(dropped_packet_indexes)
+ )
self.verify_capture(packets, dropped_packet_indexes)
self.src_if.assert_nothing_captured()
def test_missing_upper(self):
- """ missing upper layer """
- optdata = '\x00' * 100
- 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) /
- IPv6ExtHdrFragment(m=1) /
- IPv6ExtHdrDestOpt(nh=17, options=PadN(optdata='\101' * 255) /
- PadN(optdata='\102'*255)))
+ """missing upper layer"""
+ optdata = "\x00" * 100
+ 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)
+ / IPv6ExtHdrFragment(m=1)
+ / IPv6ExtHdrDestOpt(
+ nh=17, options=PadN(optdata="\101" * 255) / PadN(optdata="\102" * 255)
+ )
+ )
self.pg_enable_capture()
self.src_if.add_stream([p])
self.assert_equal(icmp[ICMPv6ParamProblem].code, 3, "ICMP code")
def test_truncated_fragment(self):
- """ truncated fragment """
- pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6,
- nh=44, plen=2) /
- IPv6ExtHdrFragment(nh=6))
+ """truncated fragment"""
+ pkt = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6, nh=44, plen=2)
+ / IPv6ExtHdrFragment(nh=6)
+ )
self.send_and_assert_no_replies(self.pg0, [pkt], self.pg0)
def test_invalid_frag_size(self):
- """ fragment size not a multiple of 8 """
- 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) /
- UDP(sport=1234, dport=5678) /
- Raw())
+ """fragment size not a multiple of 8"""
+ 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)
+ / UDP(sport=1234, dport=5678)
+ / Raw()
+ )
self.extend_packet(p, 1000, self.padding)
fragments = fragment_rfc8200(p, 1, 500)
bad_fragment = fragments[0]
self.assert_equal(icmp[ICMPv6ParamProblem].code, 0, "ICMP code")
def test_invalid_packet_size(self):
- """ total packet size > 65535 """
- 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) /
- UDP(sport=1234, dport=5678) /
- Raw())
+ """total packet size > 65535"""
+ 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)
+ / UDP(sport=1234, dport=5678)
+ / Raw()
+ )
self.extend_packet(p, 1000, self.padding)
fragments = fragment_rfc8200(p, 1, 500)
bad_fragment = fragments[1]
self.assert_equal(icmp[ICMPv6ParamProblem].code, 0, "ICMP code")
def test_atomic_fragment(self):
- """ IPv6 atomic fragment """
- pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6,
- nh=44, plen=65535) /
- IPv6ExtHdrFragment(offset=8191, m=1, res1=0xFF, res2=0xFF,
- nh=255, id=0xffff)/('X'*1452))
+ """IPv6 atomic fragment"""
+ pkt = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6, nh=44, plen=65535)
+ / IPv6ExtHdrFragment(
+ offset=8191, m=1, res1=0xFF, res2=0xFF, nh=255, id=0xFFFF
+ )
+ / ("X" * 1452)
+ )
rx = self.send_and_expect(self.pg0, [pkt], self.pg0)
self.assertIn(ICMPv6ParamProblem, rx[0])
def test_truncated_fragment(self):
- """ IPv6 truncated fragment header """
- pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6,
- nh=44, plen=2) /
- IPv6ExtHdrFragment(nh=6))
+ """IPv6 truncated fragment header"""
+ pkt = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6, nh=44, plen=2)
+ / IPv6ExtHdrFragment(nh=6)
+ )
self.send_and_assert_no_replies(self.pg0, [pkt])
- pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.remote_ip6) /
- ICMPv6EchoRequest())
+ pkt = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.remote_ip6)
+ / ICMPv6EchoRequest()
+ )
rx = self.send_and_expect(self.pg0, [pkt], self.pg0)
def test_one_fragment(self):
- """ whole packet in one fragment processed independently """
- pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
- ICMPv6EchoRequest()/Raw('X' * 1600))
+ """whole packet in one fragment processed independently"""
+ pkt = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6)
+ / ICMPv6EchoRequest()
+ / Raw("X" * 1600)
+ )
frags = fragment_rfc8200(pkt, 1, 400)
# send a fragment with known id
self.send_and_assert_no_replies(self.pg0, [frags[0]])
# send an atomic fragment with same id - should be reassembled
- pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
- IPv6ExtHdrFragment(id=1)/ICMPv6EchoRequest())
+ pkt = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6)
+ / IPv6ExtHdrFragment(id=1)
+ / ICMPv6EchoRequest()
+ )
rx = self.send_and_expect(self.pg0, [pkt], self.pg0)
self.assertNotIn(IPv6ExtHdrFragment, rx)
self.assertNotIn(IPv6ExtHdrFragment, rx)
def test_bunch_of_fragments(self):
- """ valid fragments followed by rogue fragments and atomic fragment"""
- pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
- ICMPv6EchoRequest()/Raw('X' * 1600))
+ """valid fragments followed by rogue fragments and atomic fragment"""
+ pkt = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6)
+ / ICMPv6EchoRequest()
+ / Raw("X" * 1600)
+ )
frags = fragment_rfc8200(pkt, 1, 400)
self.send_and_expect(self.pg0, frags, self.pg0, n_rx=1)
- inc_frag = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
- IPv6ExtHdrFragment(id=1, nh=58, offset=608)/Raw('X'*308))
+ inc_frag = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6)
+ / IPv6ExtHdrFragment(id=1, nh=58, offset=608)
+ / Raw("X" * 308)
+ )
- self.send_and_assert_no_replies(self.pg0, inc_frag*604)
+ self.send_and_assert_no_replies(self.pg0, inc_frag * 604)
- pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
- IPv6ExtHdrFragment(id=1)/ICMPv6EchoRequest())
+ pkt = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6)
+ / IPv6ExtHdrFragment(id=1)
+ / ICMPv6EchoRequest()
+ )
rx = self.send_and_expect(self.pg0, [pkt], self.pg0)
self.assertNotIn(IPv6ExtHdrFragment, rx)
def test_local_enable_disable(self):
- """ local reassembly enabled/disable """
+ """local reassembly enabled/disable"""
self.vapi.ip_reassembly_enable_disable(
- sw_if_index=self.src_if.sw_if_index, enable_ip6=False)
+ sw_if_index=self.src_if.sw_if_index, enable_ip6=False
+ )
self.vapi.ip_local_reass_enable_disable(enable_ip6=True)
- pkt = (Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac) /
- IPv6(src=self.src_if.remote_ip6, dst=self.src_if.local_ip6) /
- ICMPv6EchoRequest(id=1234)/Raw('X' * 1600))
+ pkt = (
+ Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac)
+ / IPv6(src=self.src_if.remote_ip6, dst=self.src_if.local_ip6)
+ / ICMPv6EchoRequest(id=1234)
+ / Raw("X" * 1600)
+ )
frags = fragment_rfc8200(pkt, 1, 400)
r = self.send_and_expect(self.src_if, frags, self.src_if, n_rx=1)[0]
self.assertEqual(1234, r[ICMPv6EchoReply].id)
class TestIPv6MWReassembly(VppTestCase):
- """ IPv6 Reassembly (multiple workers) """
+ """IPv6 Reassembly (multiple workers)"""
+
vpp_worker_count = 3
@classmethod
def setUpClass(cls):
super().setUpClass()
- cls.create_pg_interfaces(range(cls.vpp_worker_count+1))
+ cls.create_pg_interfaces(range(cls.vpp_worker_count + 1))
cls.src_if = cls.pg0
cls.send_ifs = cls.pg_interfaces[:-1]
cls.dst_if = cls.pg_interfaces[-1]
# 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.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()
super().tearDownClass()
def setUp(self):
- """ Test setup - force timeout on existing reassemblies """
+ """Test setup - force timeout on existing reassemblies"""
super().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.virtual_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)
+ 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.virtual_sleep(0.25)
+ 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):
for intf in self.send_ifs:
self.vapi.ip_reassembly_enable_disable(
- sw_if_index=intf.sw_if_index, enable_ip6=False)
+ sw_if_index=intf.sw_if_index, enable_ip6=False
+ )
super().tearDown()
def show_commands_at_teardown(self):
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))
+ 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
# 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)))
+ 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 .
packet_index = payload_info.index
self.assertTrue(
packet_index not in dropped_packet_indexes,
- ppp("Packet received, but should be dropped:", packet))
+ 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.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)
+ 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(self.vpp_worker_count):
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)
+ (
+ 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 """
+ """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
class TestIPv6SVReassembly(VppTestCase):
- """ IPv6 Shallow Virtual Reassembly """
+ """IPv6 Shallow Virtual Reassembly"""
@classmethod
def setUpClass(cls):
i.resolve_ndp()
def setUp(self):
- """ Test setup - force timeout on existing reassemblies """
+ """Test setup - force timeout on existing reassemblies"""
super().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)
+ 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,
+ 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.virtual_sleep(.25)
+ expire_walk_interval_ms=10,
+ is_ip6=1,
+ )
+ self.virtual_sleep(0.25)
self.vapi.ip_reassembly_set(
- timeout_ms=1000000, max_reassemblies=1000,
+ 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)
+ expire_walk_interval_ms=10000,
+ is_ip6=1,
+ )
def tearDown(self):
super().tearDown()
self.logger.debug(self.vapi.ppcli("show buffers"))
def test_basic(self):
- """ basic reassembly """
+ """basic reassembly"""
payload_len = 1000
payload = ""
counter = 0
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)
+ 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.assertEqual(sent[Raw].payload, recvd[Raw].payload)
def test_verify_clear_trace_mid_reassembly(self):
- """ verify clear trace works mid-reassembly """
+ """verify clear trace works mid-reassembly"""
payload_len = 1000
payload = ""
counter = 0
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)
+ 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.pg_enable_capture()
self.src_if.add_stream(fragments[1])
self.dst_if.get_capture(len(fragments[2:]))
def test_timeout(self):
- """ reassembly timeout """
+ """reassembly timeout"""
payload_len = 1000
payload = ""
counter = 0
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)
+ 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,
+ 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)
+ 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.assertEqual(sent[Raw].payload, recvd[Raw].payload)
# wait for cleanup
- self.virtual_sleep(.25, "wait before sending rest of fragments")
+ self.virtual_sleep(0.25, "wait before sending rest of fragments")
# send rest of fragments - shouldn't be forwarded
self.pg_enable_capture()
self.dst_if.assert_nothing_captured()
def test_lru(self):
- """ reassembly reuses LRU element """
+ """reassembly reuses LRU element"""
self.vapi.ip_reassembly_set(
- timeout_ms=1000000, max_reassemblies=1,
+ 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)
+ is_ip6=1,
+ expire_walk_interval_ms=10000,
+ )
payload_len = 1000
payload = ""
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)]
+ 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.assertEqual(sent[Raw].payload, recvd[Raw].payload)
def test_one_fragment(self):
- """ whole packet in one fragment processed independently """
- pkt = (Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac) /
- IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
- ICMPv6EchoRequest()/Raw('X' * 1600))
+ """whole packet in one fragment processed independently"""
+ pkt = (
+ Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac)
+ / IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6)
+ / ICMPv6EchoRequest()
+ / Raw("X" * 1600)
+ )
frags = fragment_rfc8200(pkt, 1, 400)
# send a fragment with known id
self.send_and_expect(self.src_if, [frags[0]], self.dst_if)
# send an atomic fragment with same id - should be reassembled
- pkt = (Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac) /
- IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
- IPv6ExtHdrFragment(id=1)/ICMPv6EchoRequest())
+ pkt = (
+ Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac)
+ / IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6)
+ / IPv6ExtHdrFragment(id=1)
+ / ICMPv6EchoRequest()
+ )
rx = self.send_and_expect(self.src_if, [pkt], self.dst_if)
# now forward packets matching original reassembly, should still work
rx = self.send_and_expect(self.src_if, frags[1:], self.dst_if)
def test_bunch_of_fragments(self):
- """ valid fragments followed by rogue fragments and atomic fragment"""
- pkt = (Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac) /
- IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
- ICMPv6EchoRequest()/Raw('X' * 1600))
+ """valid fragments followed by rogue fragments and atomic fragment"""
+ pkt = (
+ Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac)
+ / IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6)
+ / ICMPv6EchoRequest()
+ / Raw("X" * 1600)
+ )
frags = fragment_rfc8200(pkt, 1, 400)
rx = self.send_and_expect(self.src_if, frags, self.dst_if)
- rogue = (Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac) /
- IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
- IPv6ExtHdrFragment(id=1, nh=58, offset=608)/Raw('X'*308))
+ rogue = (
+ Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac)
+ / IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6)
+ / IPv6ExtHdrFragment(id=1, nh=58, offset=608)
+ / Raw("X" * 308)
+ )
- self.send_and_expect(self.src_if, rogue*604, self.dst_if)
+ self.send_and_expect(self.src_if, rogue * 604, self.dst_if)
- pkt = (Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac) /
- IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
- IPv6ExtHdrFragment(id=1)/ICMPv6EchoRequest())
+ pkt = (
+ Ether(src=self.src_if.local_mac, dst=self.src_if.remote_mac)
+ / IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6)
+ / IPv6ExtHdrFragment(id=1)
+ / ICMPv6EchoRequest()
+ )
rx = self.send_and_expect(self.src_if, [pkt], self.dst_if)
def test_truncated_fragment(self):
- """ truncated fragment """
- pkt = (Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac) /
- IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6,
- nh=44, plen=2) /
- IPv6ExtHdrFragment(nh=6))
+ """truncated fragment"""
+ pkt = (
+ Ether(src=self.pg0.local_mac, dst=self.pg0.remote_mac)
+ / IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6, nh=44, plen=2)
+ / IPv6ExtHdrFragment(nh=6)
+ )
self.send_and_assert_no_replies(self.pg0, [pkt], self.pg0)
class TestIPv4ReassemblyLocalNode(VppTestCase):
- """ IPv4 Reassembly for packets coming to ip4-local node """
+ """IPv4 Reassembly for packets coming to ip4-local node"""
@classmethod
def setUpClass(cls):
super().tearDownClass()
def setUp(self):
- """ Test setup - force timeout on existing reassemblies """
+ """Test setup - force timeout on existing reassemblies"""
super().setUp()
- self.vapi.ip_reassembly_set(timeout_ms=0, max_reassemblies=1000,
- max_reassembly_length=1000,
- expire_walk_interval_ms=10)
- self.virtual_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=0,
+ max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=10,
+ )
+ self.virtual_sleep(0.25)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000,
+ max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=10000,
+ )
def tearDown(self):
super().tearDown()
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))
+ 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
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)))
+ 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.
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)
+ self.assertIn(
+ index, seen, "Packet with packet_index %d not received" % index
+ )
def test_reassembly(self):
- """ basic reassembly """
+ """basic reassembly"""
self.pg_enable_capture()
self.src_dst_if.add_stream(self.fragments_300)
class TestFIFReassembly(VppTestCase):
- """ Fragments in fragments reassembly """
+ """Fragments in fragments reassembly"""
@classmethod
def setUpClass(cls):
super().tearDownClass()
def setUp(self):
- """ Test setup - force timeout on existing reassemblies """
+ """Test setup - force timeout on existing reassemblies"""
super().setUp()
self.vapi.ip_reassembly_enable_disable(
- sw_if_index=self.src_if.sw_if_index, enable_ip4=True,
- enable_ip6=True)
+ sw_if_index=self.src_if.sw_if_index, enable_ip4=True, enable_ip6=True
+ )
self.vapi.ip_reassembly_enable_disable(
- 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.virtual_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)
+ 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.virtual_sleep(0.25)
+ 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().tearDown()
packet_index = payload_info.index
self.assertTrue(
packet_index not in dropped_packet_indexes,
- ppp("Packet received, but should be dropped:", packet))
+ 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.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)
+ self.assertTrue(
+ index in seen or index in dropped_packet_indexes,
+ "Packet with packet_index %d not received" % index,
+ )
def test_fif4(self):
- """ Fragments in fragments (4o4) """
+ """Fragments in fragments (4o4)"""
# TODO this should be ideally in setUpClass, but then we hit a bug
# with VppIpRoute incorrectly reporting it's present when it's not
self.gre4.config_ip4()
self.vapi.ip_reassembly_enable_disable(
- sw_if_index=self.gre4.sw_if_index, enable_ip4=True)
+ sw_if_index=self.gre4.sw_if_index, enable_ip4=True
+ )
- self.route4 = VppIpRoute(self, self.tun_ip4, 32,
- [VppRoutePath(self.src_if.remote_ip4,
- self.src_if.sw_if_index)])
+ self.route4 = VppIpRoute(
+ self,
+ self.tun_ip4,
+ 32,
+ [VppRoutePath(self.src_if.remote_ip4, self.src_if.sw_if_index)],
+ )
self.route4.add_vpp_config()
self.reset_packet_infos()
# Ethernet header here is only for size calculation, thus it
# doesn't matter how it's initialized. This is to ensure that
# reassembled packet is not > 9000 bytes, so that it's not dropped
- p = (Ether() /
- IP(id=i, src=self.src_if.remote_ip4,
- dst=self.dst_if.remote_ip4) /
- UDP(sport=1234, dport=5678) /
- Raw(payload))
+ p = (
+ Ether()
+ / IP(id=i, src=self.src_if.remote_ip4, dst=self.dst_if.remote_ip4)
+ / UDP(sport=1234, dport=5678)
+ / Raw(payload)
+ )
size = self.packet_sizes[(i // 2) % len(self.packet_sizes)]
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.items()
- for x in fragment_rfc791(p.data, 400)]
+ fragments = [
+ x
+ for _, p in self._packet_infos.items()
+ for x in fragment_rfc791(p.data, 400)
+ ]
- encapped_fragments = \
- [Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
- IP(src=self.tun_ip4, dst=self.src_if.local_ip4) /
- GRE() /
- p
- for p in fragments]
+ encapped_fragments = [
+ Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac)
+ / IP(src=self.tun_ip4, dst=self.src_if.local_ip4)
+ / GRE()
+ / p
+ for p in fragments
+ ]
- fragmented_encapped_fragments = \
- [x for p in encapped_fragments
- for x in fragment_rfc791(p, 200)]
+ fragmented_encapped_fragments = [
+ x for p in encapped_fragments for x in fragment_rfc791(p, 200)
+ ]
self.src_if.add_stream(fragmented_encapped_fragments)
self.logger.debug(self.vapi.ppcli("show interface"))
def test_fif6(self):
- """ Fragments in fragments (6o6) """
+ """Fragments in fragments (6o6)"""
# TODO this should be ideally in setUpClass, but then we hit a bug
# with VppIpRoute incorrectly reporting it's present when it's not
# so we need to manually remove the vpp config, thus we cannot have
self.gre6.config_ip6()
self.vapi.ip_reassembly_enable_disable(
- sw_if_index=self.gre6.sw_if_index, enable_ip6=True)
+ 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)])
+ self.route6 = VppIpRoute(
+ self,
+ self.tun_ip6,
+ 128,
+ [VppRoutePath(self.src_if.remote_ip6, self.src_if.sw_if_index)],
+ )
self.route6.add_vpp_config()
self.reset_packet_infos()
# Ethernet header here is only for size calculation, thus it
# doesn't matter how it's initialized. This is to ensure that
# reassembled packet is not > 9000 bytes, so that it's not dropped
- p = (Ether() /
- IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
- UDP(sport=1234, dport=5678) /
- Raw(payload))
+ p = (
+ Ether()
+ / IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6)
+ / UDP(sport=1234, dport=5678)
+ / Raw(payload)
+ )
size = self.packet_sizes[(i // 2) % len(self.packet_sizes)]
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.items()
- for x in fragment_rfc8200(
- i.data, i.index, 400)]
+ fragments = [
+ x
+ for _, i in self._packet_infos.items()
+ for x in fragment_rfc8200(i.data, i.index, 400)
+ ]
- encapped_fragments = \
- [Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
- IPv6(src=self.tun_ip6, dst=self.src_if.local_ip6) /
- GRE() /
- p
- for p in fragments]
+ encapped_fragments = [
+ Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac)
+ / IPv6(src=self.tun_ip6, dst=self.src_if.local_ip6)
+ / GRE()
+ / p
+ for p in fragments
+ ]
- fragmented_encapped_fragments = \
- [x for p in encapped_fragments for x in (
+ fragmented_encapped_fragments = [
+ x
+ for p in encapped_fragments
+ for x in (
fragment_rfc8200(
- p,
- 2 * len(self._packet_infos) + p[IPv6ExtHdrFragment].id,
- 200)
- if IPv6ExtHdrFragment in p else [p]
+ p, 2 * len(self._packet_infos) + p[IPv6ExtHdrFragment].id, 200
+ )
+ if IPv6ExtHdrFragment in p
+ else [p]
)
- ]
+ ]
self.src_if.add_stream(fragmented_encapped_fragments)
self.gre6.remove_vpp_config()
-if __name__ == '__main__':
+if __name__ == "__main__":
unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff