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(frags)
self.pg_start()
self.dst_if.get_capture(1)
self.assert_error_counter_equal(error_cnt_str, error_cnt + 1)
def create_fragments(cls):
infos = cls._packet_infos
cls.pkt_infos = []
for index, info in six.iteritems(infos):
p = info.data
# cls.logger.debug(ppp("Packet:", p.__class__(str(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)))
def verify_tun_reass_66(self, p):
self.vapi.cli("clear errors")
self.vapi.ip_reassembly_enable_disable(
sw_if_index=self.tun_if.sw_if_index, enable_ip6=True)
try:
config_tun_params(p, self.encryption_type, self.tun_if)
send_pkts = self.gen_encrypt_pkts6(p.scapy_tun_sa,
self.tun_if,
src=p.remote_tun_if_host,
dst=self.pg1.remote_ip6,
count=1,
payload_size=1900)
send_pkts = fragment_rfc8200(send_pkts[0], 1, 1400, self.logger)
recv_pkts = self.send_and_expect(self.tun_if,
send_pkts,
self.pg1,
n_rx=1)
self.verify_decrypted6(p, recv_pkts)
send_pkts = self.gen_pkts6(self.pg1,
src=self.pg1.remote_ip6,
dst=p.remote_tun_if_host,
count=1,
payload_size=64)
recv_pkts = self.send_and_expect(self.pg1, send_pkts, self.tun_if)
self.verify_encrypted6(p, p.vpp_tun_sa, recv_pkts)
finally:
self.logger.info(self.vapi.ppcli("show error"))
self.logger.info(self.vapi.ppcli("show ipsec all"))
self.verify_counters6(p, p, 1)
self.vapi.ip_reassembly_enable_disable(
sw_if_index=self.tun_if.sw_if_index, enable_ip6=False)
def create_fragments(cls):
infos = cls._packet_infos
cls.pkt_infos = []
for index, info in six.iteritems(infos):
p = info.data
# cls.logger.debug(ppp("Packet:",
# p.__class__(scapy.compat.raw(p))))
fragments_400 = fragment_rfc8200(p, 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)))
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())
self.extend_packet(p, 1000, self.padding)
fragments = fragment_rfc8200(p, 1, 500)
bad_fragment = fragments[1]
bad_fragment[IPv6ExtHdrFragment].offset = 65500
self.pg_enable_capture()
self.src_if.add_stream([bad_fragment])
self.pg_start()
pkts = self.src_if.get_capture(expected_count=1)
icmp = pkts[0]
self.assertIn(ICMPv6ParamProblem, icmp)
self.assert_equal(icmp[ICMPv6ParamProblem].code, 0, "ICMP code")
def test_invalid_frag_size(self):
""" fragment size not a multiple of 8 """
p = (Ether(dst=self.pg_if.local_mac, src=self.pg_if.remote_mac) /
IPv6(src=self.pg_if.remote_ip6, dst=self.pg_if.local_ip6) /
UDP(sport=1234, dport=self.punt_port) / Raw())
self.extend_packet(p, 1000, self.padding)
fragments = fragment_rfc8200(p, 1, 500)
bad_fragment = fragments[0]
self.extend_packet(bad_fragment, len(bad_fragment) + 5)
self.pg_enable_capture()
self.pg_if.add_stream([bad_fragment])
self.pg_start()
pkts = self.pg_if.get_capture(expected_count=1)
icmp = pkts[0]
self.assertIn(ICMPv6ParamProblem, icmp)
self.assert_equal(icmp[ICMPv6ParamProblem].code, 0, "ICMP code")
def test_missing_upper(self):
""" missing upper layer """
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 = p.__class__(scapy.compat.raw(fragments[1]))
bad_fragment[IPv6ExtHdrFragment].nh = 59
bad_fragment[IPv6ExtHdrFragment].offset = 0
self.pg_enable_capture()
self.src_if.add_stream([bad_fragment])
self.pg_start()
pkts = self.src_if.get_capture(expected_count=1)
icmp = pkts[0]
self.assertIn(ICMPv6ParamProblem, icmp)
self.assert_equal(icmp[ICMPv6ParamProblem].code, 3, "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())
self.extend_packet(p, 1000, self.padding)
fragments = fragment_rfc8200(p, 1, 500)
bad_fragment = fragments[1]
bad_fragment[IPv6ExtHdrFragment].offset = 65500
self.pg_enable_capture()
self.src_if.add_stream([bad_fragment])
self.pg_start()
pkts = self.src_if.get_capture(expected_count=1)
icmp = pkts[0]
self.assertIn(ICMPv6ParamProblem, icmp)
self.assert_equal(icmp[ICMPv6ParamProblem].code, 0, "ICMP code")
def test_missing_upper(self):
""" missing upper layer """
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 = p.__class__(scapy.compat.raw(fragments[1]))
bad_fragment[IPv6ExtHdrFragment].nh = 59
bad_fragment[IPv6ExtHdrFragment].offset = 0
self.pg_enable_capture()
self.src_if.add_stream([bad_fragment])
self.pg_start()
pkts = self.src_if.get_capture(expected_count=1)
icmp = pkts[0]
self.assertIn(ICMPv6ParamProblem, icmp)
self.assert_equal(icmp[ICMPv6ParamProblem].code, 3, "ICMP code")
def test_map_e(self):
""" MAP-E """
#
# Add a route to the MAP-BR
#
map_br_pfx = "2001::"
map_br_pfx_len = 32
map_route = VppIpRoute(
self, map_br_pfx, map_br_pfx_len,
[VppRoutePath(self.pg1.remote_ip6, self.pg1.sw_if_index)])
map_route.add_vpp_config()
#
# Add a domain that maps from pg0 to pg1
#
map_dst = '2001::/32'
map_src = '3000::1/128'
client_pfx = '192.168.0.0/16'
map_translated_addr = '2001:0:101:7000:0:c0a8:101:7'
tag = 'MAP-E tag.'
self.vapi.map_add_domain(ip4_prefix=client_pfx,
ip6_prefix=map_dst,
ip6_src=map_src,
ea_bits_len=20,
psid_offset=4,
psid_length=4,
tag=tag)
self.vapi.map_param_set_security_check(enable=1, fragments=1)
# Enable MAP on interface.
self.vapi.map_if_enable_disable(is_enable=1,
sw_if_index=self.pg0.sw_if_index,
is_translation=0)
# Ensure MAP doesn't steal all packets!
v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
UDP(sport=20000, dport=10000) / Raw(b'\xa5' * 100))
rx = self.send_and_expect(self.pg0, v4 * 1, self.pg0)
v4_reply = v4[1]
v4_reply.ttl -= 1
for p in rx:
self.validate(p[1], v4_reply)
#
# Fire in a v4 packet that will be encapped to the BR
#
v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst='192.168.1.1') /
UDP(sport=20000, dport=10000) / Raw(b'\xa5' * 100))
self.send_and_assert_encapped_one(v4, "3000::1", map_translated_addr)
#
# Verify reordered fragments are able to pass as well
#
v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(id=1, src=self.pg0.remote_ip4, dst='192.168.1.1') /
UDP(sport=20000, dport=10000) / Raw(b'\xa5' * 1000))
frags = fragment_rfc791(v4, 400)
frags.reverse()
self.send_and_assert_encapped(frags, "3000::1", map_translated_addr)
# Enable MAP on interface.
self.vapi.map_if_enable_disable(is_enable=1,
sw_if_index=self.pg1.sw_if_index,
is_translation=0)
# Ensure MAP doesn't steal all packets
v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
UDP(sport=20000, dport=10000) / Raw(b'\xa5' * 100))
rx = self.send_and_expect(self.pg1, v6 * 1, self.pg1)
v6_reply = v6[1]
v6_reply.hlim -= 1
for p in rx:
self.validate(p[1], v6_reply)
#
# Fire in a V6 encapped packet.
# expect a decapped packet on the inside ip4 link
#
p = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(dst='3000::1', src=map_translated_addr) /
IP(dst=self.pg0.remote_ip4, src='192.168.1.1') /
UDP(sport=10000, dport=20000) / Raw(b'\xa5' * 100))
self.pg1.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
rx = rx[0]
self.assertFalse(rx.haslayer(IPv6))
self.assertEqual(rx[IP].src, p[IP].src)
self.assertEqual(rx[IP].dst, p[IP].dst)
#
# Verify encapped reordered fragments pass as well
#
p = (IP(id=1, dst=self.pg0.remote_ip4, src='192.168.1.1') /
UDP(sport=10000, dport=20000) / Raw(b'\xa5' * 1500))
frags = fragment_rfc791(p, 400)
frags.reverse()
stream = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(dst='3000::1', src=map_translated_addr) / x
for x in frags)
self.pg1.add_stream(stream)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(len(frags))
for r in rx:
self.assertFalse(r.haslayer(IPv6))
self.assertEqual(r[IP].src, p[IP].src)
self.assertEqual(r[IP].dst, p[IP].dst)
# Verify that fragments pass even if ipv6 layer is fragmented
stream = (IPv6(dst='3000::1', src=map_translated_addr) / x
for x in frags)
v6_stream = [
Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) / x
for i in range(len(frags)) for x in fragment_rfc8200(
IPv6(dst='3000::1', src=map_translated_addr) /
frags[i], i, 200)
]
self.pg1.add_stream(v6_stream)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(len(frags))
for r in rx:
self.assertFalse(r.haslayer(IPv6))
self.assertEqual(r[IP].src, p[IP].src)
self.assertEqual(r[IP].dst, p[IP].dst)
#
# Pre-resolve. No API for this!!
#
self.vapi.ppcli("map params pre-resolve ip6-nh 4001::1")
self.send_and_assert_no_replies(self.pg0, v4,
"resolved via default route")
#
# Add a route to 4001::1. Expect the encapped traffic to be
# sent via that routes next-hop
#
pre_res_route = VppIpRoute(
self, "4001::1", 128,
[VppRoutePath(self.pg1.remote_hosts[2].ip6, self.pg1.sw_if_index)])
pre_res_route.add_vpp_config()
self.send_and_assert_encapped_one(v4,
"3000::1",
map_translated_addr,
dmac=self.pg1.remote_hosts[2].mac)
#
# change the route to the pre-solved next-hop
#
pre_res_route.modify(
[VppRoutePath(self.pg1.remote_hosts[3].ip6, self.pg1.sw_if_index)])
pre_res_route.add_vpp_config()
self.send_and_assert_encapped_one(v4,
"3000::1",
map_translated_addr,
dmac=self.pg1.remote_hosts[3].mac)
#
# cleanup. The test infra's object registry will ensure
# the route is really gone and thus that the unresolve worked.
#
pre_res_route.remove_vpp_config()
self.vapi.ppcli("map params pre-resolve del ip6-nh 4001::1")
def test_fif6(self):
""" 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
# it shared for multiple test cases
self.tun_ip6 = "1002::1"
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()
self.vapi.ip_reassembly_enable_disable(
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)
self.route6.add_vpp_config()
self.reset_packet_infos()
for i in range(test_packet_count):
info = self.create_packet_info(self.src_if, self.dst_if)
payload = self.info_to_payload(info)
# 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))
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 six.iteritems(self._packet_infos)
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]
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]
)
]
self.src_if.add_stream(fragmented_encapped_fragments)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.src_if.assert_nothing_captured()
packets = self.dst_if.get_capture(len(self._packet_infos))
self.verify_capture(packets, IPv6)
# TODO remove gre vpp config by hand until VppIpRoute gets fixed
# so that it's query_vpp_config() works as it should
self.gre6.remove_vpp_config()
def test_map_t(self):
"""MAP-T"""
#
# Add a domain that maps from pg0 to pg1
#
map_dst = "2001:db8::/32"
map_src = "1234:5678:90ab:cdef::/64"
ip4_pfx = "192.168.0.0/24"
tag = "MAP-T Tag."
self.vapi.map_add_domain(
ip6_prefix=map_dst,
ip4_prefix=ip4_pfx,
ip6_src=map_src,
ea_bits_len=16,
psid_offset=6,
psid_length=4,
mtu=1500,
tag=tag,
)
# Enable MAP-T on interfaces.
self.vapi.map_if_enable_disable(is_enable=1,
sw_if_index=self.pg0.sw_if_index,
is_translation=1)
self.vapi.map_if_enable_disable(is_enable=1,
sw_if_index=self.pg1.sw_if_index,
is_translation=1)
# Ensure MAP doesn't steal all packets!
v4 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.remote_ip4) /
UDP(sport=20000, dport=10000) / Raw(b"\xa5" * 100))
rx = self.send_and_expect(self.pg0, v4 * 1, self.pg0)
v4_reply = v4[1]
v4_reply.ttl -= 1
for p in rx:
self.validate(p[1], v4_reply)
# Ensure MAP doesn't steal all packets
v6 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(src=self.pg1.remote_ip6, dst=self.pg1.remote_ip6) /
UDP(sport=20000, dport=10000) / Raw(b"\xa5" * 100))
rx = self.send_and_expect(self.pg1, v6 * 1, self.pg1)
v6_reply = v6[1]
v6_reply.hlim -= 1
for p in rx:
self.validate(p[1], v6_reply)
map_route = VppIpRoute(
self,
"2001:db8::",
32,
[
VppRoutePath(
self.pg1.remote_ip6,
self.pg1.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6,
)
],
)
map_route.add_vpp_config()
#
# Send a v4 packet that will be translated
#
p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
p_ip4 = IP(src=self.pg0.remote_ip4, dst="192.168.0.1")
payload = TCP(sport=0xABCD, dport=0xABCD)
p4 = p_ether / p_ip4 / payload
p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
dst="2001:db8:1f0::c0a8:1:f") / payload)
p6_translated.hlim -= 1
rx = self.send_and_expect(self.pg0, p4 * 1, self.pg1)
for p in rx:
self.validate(p[1], p6_translated)
# Send back an IPv6 packet that will be "untranslated"
p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
p_ip6 = IPv6(src="2001:db8:1f0::c0a8:1:f",
dst="1234:5678:90ab:cdef:ac:1001:200:0")
p6 = p_ether6 / p_ip6 / payload
p4_translated = IP(src="192.168.0.1",
dst=self.pg0.remote_ip4) / payload
p4_translated.id = 0
p4_translated.ttl -= 1
rx = self.send_and_expect(self.pg1, p6 * 1, self.pg0)
for p in rx:
self.validate(p[1], p4_translated)
# IPv4 TTL=0
ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst="192.168.0.1", ttl=0)
p4 = p_ether / ip4_ttl_expired / payload
icmp4_reply = (
IP(id=0, ttl=254, src=self.pg0.local_ip4, dst=self.pg0.remote_ip4)
/ ICMP(type="time-exceeded", code="ttl-zero-during-transit") /
IP(src=self.pg0.remote_ip4, dst="192.168.0.1", ttl=0) / payload)
rx = self.send_and_expect(self.pg0, p4 * 1, self.pg0)
for p in rx:
self.validate(p[1], icmp4_reply)
# IPv4 TTL=1
ip4_ttl_expired = IP(src=self.pg0.remote_ip4, dst="192.168.0.1", ttl=1)
p4 = p_ether / ip4_ttl_expired / payload
icmp4_reply = (
IP(id=0, ttl=254, src=self.pg0.local_ip4, dst=self.pg0.remote_ip4)
/ ICMP(type="time-exceeded", code="ttl-zero-during-transit") /
IP(src=self.pg0.remote_ip4, dst="192.168.0.1", ttl=1) / payload)
rx = self.send_and_expect(self.pg0, p4 * 1, self.pg0)
for p in rx:
self.validate(p[1], icmp4_reply)
# IPv6 Hop limit at BR
ip6_hlim_expired = IPv6(
hlim=1,
src="2001:db8:1ab::c0a8:1:ab",
dst="1234:5678:90ab:cdef:ac:1001:200:0",
)
p6 = p_ether6 / ip6_hlim_expired / payload
icmp6_reply = (IPv6(
hlim=255, src=self.pg1.local_ip6, dst="2001:db8:1ab::c0a8:1:ab") /
ICMPv6TimeExceeded(code=0) / IPv6(
src="2001:db8:1ab::c0a8:1:ab",
dst="1234:5678:90ab:cdef:ac:1001:200:0",
hlim=1,
) / payload)
rx = self.send_and_expect(self.pg1, p6 * 1, self.pg1)
for p in rx:
self.validate(p[1], icmp6_reply)
# IPv6 Hop limit beyond BR
ip6_hlim_expired = IPv6(
hlim=0,
src="2001:db8:1ab::c0a8:1:ab",
dst="1234:5678:90ab:cdef:ac:1001:200:0",
)
p6 = p_ether6 / ip6_hlim_expired / payload
icmp6_reply = (IPv6(
hlim=255, src=self.pg1.local_ip6, dst="2001:db8:1ab::c0a8:1:ab") /
ICMPv6TimeExceeded(code=0) / IPv6(
src="2001:db8:1ab::c0a8:1:ab",
dst="1234:5678:90ab:cdef:ac:1001:200:0",
hlim=0,
) / payload)
rx = self.send_and_expect(self.pg1, p6 * 1, self.pg1)
for p in rx:
self.validate(p[1], icmp6_reply)
# IPv4 Well-known port
p_ip4 = IP(src=self.pg0.remote_ip4, dst="192.168.0.1")
payload = UDP(sport=200, dport=200)
p4 = p_ether / p_ip4 / payload
self.send_and_assert_no_replies(self.pg0, p4 * 1)
# IPv6 Well-known port
payload = UDP(sport=200, dport=200)
p6 = p_ether6 / p_ip6 / payload
self.send_and_assert_no_replies(self.pg1, p6 * 1)
# UDP packet fragmentation
payload_len = 1453
payload = UDP(sport=40000, dport=4000) / self.payload(payload_len)
p4 = p_ether / p_ip4 / payload
self.pg_enable_capture()
self.pg0.add_stream(p4)
self.pg_start()
rx = self.pg1.get_capture(2)
p_ip6_translated = IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
dst="2001:db8:1e0::c0a8:1:e")
for p in rx:
self.validate_frag6(p, p_ip6_translated)
self.validate_frag_payload_len6(rx, UDP, payload_len)
# UDP packet fragmentation send fragments
payload_len = 1453
payload = UDP(sport=40000, dport=4000) / self.payload(payload_len)
p4 = p_ether / p_ip4 / payload
frags = fragment_rfc791(p4, fragsize=1000)
self.pg_enable_capture()
self.pg0.add_stream(frags)
self.pg_start()
rx = self.pg1.get_capture(2)
for p in rx:
self.validate_frag6(p, p_ip6_translated)
self.validate_frag_payload_len6(rx, UDP, payload_len)
# Send back an fragmented IPv6 UDP packet that will be "untranslated"
payload = UDP(sport=4000, dport=40000) / self.payload(payload_len)
p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
p_ip6 = IPv6(src="2001:db8:1e0::c0a8:1:e",
dst="1234:5678:90ab:cdef:ac:1001:200:0")
p6 = p_ether6 / p_ip6 / payload
frags6 = fragment_rfc8200(p6, identification=0xDCBA, fragsize=1000)
p_ip4_translated = IP(src="192.168.0.1", dst=self.pg0.remote_ip4)
p4_translated = p_ip4_translated / payload
p4_translated.id = 0
p4_translated.ttl -= 1
self.pg_enable_capture()
self.pg1.add_stream(frags6)
self.pg_start()
rx = self.pg0.get_capture(2)
for p in rx:
self.validate_frag4(p, p4_translated)
self.validate_frag_payload_len4(rx, UDP, payload_len)
# ICMP packet fragmentation
payload = ICMP(id=6529) / self.payload(payload_len)
p4 = p_ether / p_ip4 / payload
self.pg_enable_capture()
self.pg0.add_stream(p4)
self.pg_start()
rx = self.pg1.get_capture(2)
p_ip6_translated = IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
dst="2001:db8:160::c0a8:1:6")
for p in rx:
self.validate_frag6(p, p_ip6_translated)
self.validate_frag_payload_len6(rx, ICMPv6EchoRequest, payload_len)
# ICMP packet fragmentation send fragments
payload = ICMP(id=6529) / self.payload(payload_len)
p4 = p_ether / p_ip4 / payload
frags = fragment_rfc791(p4, fragsize=1000)
self.pg_enable_capture()
self.pg0.add_stream(frags)
self.pg_start()
rx = self.pg1.get_capture(2)
for p in rx:
self.validate_frag6(p, p_ip6_translated)
self.validate_frag_payload_len6(rx, ICMPv6EchoRequest, payload_len)
# TCP MSS clamping
self.vapi.map_param_set_tcp(1300)
#
# Send a v4 TCP SYN packet that will be translated and MSS clamped
#
p_ether = Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
p_ip4 = IP(src=self.pg0.remote_ip4, dst="192.168.0.1")
payload = TCP(sport=0xABCD,
dport=0xABCD,
flags="S",
options=[("MSS", 1460)])
p4 = p_ether / p_ip4 / payload
p6_translated = (IPv6(src="1234:5678:90ab:cdef:ac:1001:200:0",
dst="2001:db8:1f0::c0a8:1:f") / payload)
p6_translated.hlim -= 1
p6_translated[TCP].options = [("MSS", 1300)]
rx = self.send_and_expect(self.pg0, p4 * 1, self.pg1)
for p in rx:
self.validate(p[1], p6_translated)
# Send back an IPv6 packet that will be "untranslated"
p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
p_ip6 = IPv6(src="2001:db8:1f0::c0a8:1:f",
dst="1234:5678:90ab:cdef:ac:1001:200:0")
p6 = p_ether6 / p_ip6 / payload
p4_translated = IP(src="192.168.0.1",
dst=self.pg0.remote_ip4) / payload
p4_translated.id = 0
p4_translated.ttl -= 1
p4_translated[TCP].options = [("MSS", 1300)]
rx = self.send_and_expect(self.pg1, p6 * 1, self.pg0)
for p in rx:
self.validate(p[1], p4_translated)
# TCP MSS clamping cleanup
self.vapi.map_param_set_tcp(0)
# Enable icmp6 param to get back ICMPv6 unreachable messages in case
# of security check fails
self.vapi.map_param_set_icmp6(enable_unreachable=1)
# Send back an IPv6 packet that will be droppped due to security
# check fail
p_ether6 = Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac)
p_ip6_sec_check_fail = IPv6(src="2001:db8:1fe::c0a8:1:f",
dst="1234:5678:90ab:cdef:ac:1001:200:0")
payload = TCP(sport=0xABCD, dport=0xABCD)
p6 = p_ether6 / p_ip6_sec_check_fail / payload
self.pg_send(self.pg1, p6 * 1)
self.pg0.get_capture(0, timeout=1)
rx = self.pg1.get_capture(1)
icmp6_reply = (IPv6(
hlim=255, src=self.pg1.local_ip6, dst="2001:db8:1fe::c0a8:1:f") /
ICMPv6DestUnreach(code=5) / p_ip6_sec_check_fail /
payload)
for p in rx:
self.validate(p[1], icmp6_reply)
# ICMPv6 unreachable messages cleanup
self.vapi.map_param_set_icmp6(enable_unreachable=0)
def test_fif6(self):
""" 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
# it shared for multiple test cases
self.tun_ip6 = "1002::1"
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()
self.vapi.ip_reassembly_enable_disable(
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)
self.route6.add_vpp_config()
self.reset_packet_infos()
for i in range(test_packet_count):
info = self.create_packet_info(self.src_if, self.dst_if)
payload = self.info_to_payload(info)
# 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))
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 six.iteritems(self._packet_infos)
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]
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]
)
]
self.src_if.add_stream(fragmented_encapped_fragments)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.src_if.assert_nothing_captured()
packets = self.dst_if.get_capture(len(self._packet_infos))
self.verify_capture(packets, IPv6)
# TODO remove gre vpp config by hand until VppIpRoute gets fixed
# so that it's query_vpp_config() works as it should
self.gre6.remove_vpp_config()
def test_fif6(self):
""" 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
# it shared for multiple test cases
self.tun_ip6 = "1002::1"
self.gre6 = VppGre6Interface(self, self.pg0.local_ip6, self.tun_ip6)
self.gre6.add_vpp_config()
self.gre6.admin_up()
self.gre6.config_ip6()
self.route6 = VppIpRoute(self,
self.tun_ip6,
128, [
VppRoutePath(self.pg0.remote_ip6,
self.pg0.sw_if_index,
proto=DpoProto.DPO_PROTO_IP6)
],
is_ip6=1)
self.route6.add_vpp_config()
self.reset_packet_infos()
for i in range(test_packet_count):
info = self.create_packet_info(self.pg0, self.pg0)
payload = self.info_to_payload(info)
p = (IPv6(src=self.pg0.remote_ip6, dst=self.pg0.local_ip6) /
UDP(sport=1234, dport=self.punt_port) / Raw(payload))
size = self.packet_sizes[(i // 2) % len(self.packet_sizes)]
self.extend_packet(p, size, self.padding)
info.data = p
fragments = [
x for _, i in self._packet_infos.iteritems()
for x in fragment_rfc8200(i.data, i.index, 400)
]
encapped_fragments = \
[Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(src=self.tun_ip6, dst=self.pg0.local_ip6) /
GRE() /
p
for p in fragments]
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]
)
]
self.pg0.add_stream(fragmented_encapped_fragments)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.pg0.assert_nothing_captured()
packets = self.punt6_socket.wait_for_packets(len(self._packet_infos))
self.verify_capture(packets, IPv6)
# TODO remove gre vpp config by hand until VppIpRoute gets fixed
# so that it's query_vpp_config() works as it should
self.gre6.remove_vpp_config()
