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vpp/test/test_ipip.py
Steven Luong e4238aa34f ethernet: check destination mac for L3 in ethernet-input node 
When the NIC does not support mac filter, we rely on ethernet-input
node to do the destination mac check, ie, when the interface is in L3,
the mac address for the packet must be the mac address of the
interface where the packet arrives. This works fine in ethernet-input
node when all packets in the frame might have different interfaces, ie,
ETH_INPUT_FRAME_F_SINGLE_SW_IF_ID is not set in the frame. However,
when all packets are having the same interface,
ETH_INPUT_FRAME_F_SINGLE_SW_IF_ID is set, ethernet-input node goes
through the optimized routine eth_input_single_int -> eth_input_process_frame.
That is where dmac check has a bug when all packets in the frame are
either, ip4, ip6, or mpls without vlan tags. Because without vlan tags,
the code handles all packets in fast path and ignores dmac check.
With vlan tags, the code goes to slow path where dmac check is handled
properly.

The fix is to check if we have a bad dmac in the fast path and force the
code to go to slow path which will handle dmac check properly.

Also do a wholesale correction on all the testcases which do not use
the proper dmac when sending L3 packets.

Type: fix

Change-Id: I73153a805cecdc24c4eefcc781676de04737ae2c
Signed-off-by: Steven Luong <sluong@cisco.com>
2024-05-08 09:42:23 +00:00

1490 lines
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#!/usr/bin/env python3
"""IP{4,6} over IP{v,6} tunnel functional tests"""
import unittest
from scapy.layers.inet6 import IPv6, Ether, IP, UDP, IPv6ExtHdrFragment, Raw
from scapy.contrib.mpls import MPLS
from scapy.all import fragment, fragment6, RandShort, defragment6
from framework import VppTestCase
from asfframework import VppTestRunner
from vpp_ip_route import (
VppIpRoute,
VppRoutePath,
VppIpTable,
FibPathProto,
VppMplsLabel,
VppMplsRoute,
VppMplsTable,
)
from vpp_ipip_tun_interface import VppIpIpTunInterface
from vpp_teib import VppTeib
from vpp_papi import VppEnum
from util import reassemble4
""" Testipip is a subclass of VPPTestCase classes.
IPIP tests.
"""
def ipip_add_tunnel(test, src, dst, table_id=0, dscp=0x0, flags=0):
"""Add a IPIP tunnel"""
return test.vapi.ipip_add_tunnel(
tunnel={
"src": src,
"dst": dst,
"table_id": table_id,
"instance": 0xFFFFFFFF,
"dscp": dscp,
"flags": flags,
}
)
# the number of packets to send when injecting traffic.
# a multiple of 8 minus one, so we test all by 8/4/2/1 loops
N_PACKETS = 64 - 1
class TestIPIP(VppTestCase):
"""IPIP Test Case"""
@classmethod
def setUpClass(cls):
super(TestIPIP, cls).setUpClass()
cls.create_pg_interfaces(range(3))
cls.interfaces = list(cls.pg_interfaces)
@classmethod
def tearDownClass(cls):
super(TestIPIP, cls).tearDownClass()
def setUp(self):
super(TestIPIP, self).setUp()
self.table = VppIpTable(self, 1, register=False)
self.table.add_vpp_config()
for i in self.interfaces:
i.admin_up()
self.pg2.set_table_ip4(self.table.table_id)
for i in self.interfaces:
i.config_ip4()
i.config_ip6()
i.disable_ipv6_ra()
i.resolve_arp()
i.resolve_ndp()
def tearDown(self):
super(TestIPIP, self).tearDown()
if not self.vpp_dead:
for i in self.pg_interfaces:
i.unconfig_ip4()
i.unconfig_ip6()
i.set_table_ip4(0)
i.admin_down()
self.table.remove_vpp_config()
def validate(self, rx, expected):
self.assertEqual(rx, expected.__class__(expected))
def generate_ip4_frags(self, payload_length, fragment_size):
p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
p_payload = UDP(sport=1234, dport=1234) / self.payload(payload_length)
p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
outer_ip4 = (
p_ether
/ IP(src=self.pg1.remote_ip4, id=RandShort(), dst=self.pg0.local_ip4)
/ p_ip4
/ p_payload
)
frags = fragment(outer_ip4, fragment_size)
p4_reply = p_ip4 / p_payload
p4_reply.ttl -= 1
return frags, p4_reply
def verify_ip4ip4_encaps(self, a, p_ip4s, p_ip4_encaps):
for i, p_ip4 in enumerate(p_ip4s):
p_ip4.dst = a
p4 = self.p_ether / p_ip4 / self.p_payload
p_ip4_inner = p_ip4
p_ip4_inner.ttl -= 1
p4_reply = p_ip4_encaps[i] / p_ip4_inner / self.p_payload
p4_reply.ttl -= 1
p4_reply.id = 0
rx = self.send_and_expect(self.pg0, p4 * N_PACKETS, self.pg1)
for p in rx:
self.validate(p[1], p4_reply)
self.assert_packet_checksums_valid(p)
def verify_ip6ip4_encaps(self, a, p_ip6s, p_ip4_encaps):
for i, p_ip6 in enumerate(p_ip6s):
p_ip6.dst = a
p6 = self.p_ether / p_ip6 / self.p_payload
p_inner_ip6 = p_ip6
p_inner_ip6.hlim -= 1
p6_reply = p_ip4_encaps[i] / p_inner_ip6 / self.p_payload
p6_reply.ttl -= 1
rx = self.send_and_expect(self.pg0, p6 * N_PACKETS, self.pg1)
for p in rx:
self.validate(p[1], p6_reply)
self.assert_packet_checksums_valid(p)
def test_ipip4(self):
"""ip{v4,v6} over ip4 test"""
self.pg1.generate_remote_hosts(5)
self.pg1.configure_ipv4_neighbors()
e = VppEnum.vl_api_tunnel_encap_decap_flags_t
d = VppEnum.vl_api_ip_dscp_t
self.p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
self.p_payload = UDP(sport=1234, dport=1234) / Raw(b"X" * 100)
# create a TOS byte by shifting a DSCP code point 2 bits. those 2 bits
# are for the ECN.
dscp = d.IP_API_DSCP_AF31 << 2
ecn = 3
dscp_ecn = d.IP_API_DSCP_AF31 << 2 | ecn
# IPv4 transport that copies the DCSP from the payload
tun_dscp = VppIpIpTunInterface(
self,
self.pg0,
self.pg0.local_ip4,
self.pg1.remote_hosts[0].ip4,
flags=e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP,
)
tun_dscp.add_vpp_config()
# IPv4 transport that copies the DCSP and ECN from the payload
tun_dscp_ecn = VppIpIpTunInterface(
self,
self.pg0,
self.pg0.local_ip4,
self.pg1.remote_hosts[1].ip4,
flags=(
e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP
| e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN
),
)
tun_dscp_ecn.add_vpp_config()
# IPv4 transport that copies the ECN from the payload and sets the
# DF bit on encap. copies the ECN on decap
tun_ecn = VppIpIpTunInterface(
self,
self.pg0,
self.pg0.local_ip4,
self.pg1.remote_hosts[2].ip4,
flags=(
e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN
| e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_SET_DF
| e.TUNNEL_API_ENCAP_DECAP_FLAG_DECAP_COPY_ECN
),
)
tun_ecn.add_vpp_config()
# IPv4 transport that sets a fixed DSCP in the encap and copies
# the DF bit
tun = VppIpIpTunInterface(
self,
self.pg0,
self.pg0.local_ip4,
self.pg1.remote_hosts[3].ip4,
dscp=d.IP_API_DSCP_AF11,
flags=e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_DF,
)
tun.add_vpp_config()
# array of all the tunnels
tuns = [tun_dscp, tun_dscp_ecn, tun_ecn, tun]
# addresses for prefixes routed via each tunnel
a4s = ["" for i in range(len(tuns))]
a6s = ["" for i in range(len(tuns))]
# IP headers with each combination of DSCp/ECN tested
p_ip6s = [
IPv6(src="1::1", dst="DEAD::1", nh="UDP", tc=dscp),
IPv6(src="1::1", dst="DEAD::1", nh="UDP", tc=dscp_ecn),
IPv6(src="1::1", dst="DEAD::1", nh="UDP", tc=ecn),
IPv6(src="1::1", dst="DEAD::1", nh="UDP", tc=0xFF),
]
p_ip4s = [
IP(src="1.2.3.4", dst="130.67.0.1", tos=dscp, flags="DF"),
IP(src="1.2.3.4", dst="130.67.0.1", tos=dscp_ecn),
IP(src="1.2.3.4", dst="130.67.0.1", tos=ecn),
IP(src="1.2.3.4", dst="130.67.0.1", tos=0xFF),
]
# Configure each tunnel
for i, t in enumerate(tuns):
# Set interface up and enable IP on it
self.vapi.sw_interface_set_flags(t.sw_if_index, 1)
self.vapi.sw_interface_set_unnumbered(
sw_if_index=self.pg0.sw_if_index, unnumbered_sw_if_index=t.sw_if_index
)
# prefix for route / destination address for packets
a4s[i] = "130.67.%d.0" % i
a6s[i] = "dead:%d::" % i
# Add IPv4 and IPv6 routes via tunnel interface
ip4_via_tunnel = VppIpRoute(
self,
a4s[i],
24,
[
VppRoutePath(
"0.0.0.0",
t.sw_if_index,
proto=FibPathProto.FIB_PATH_NH_PROTO_IP4,
)
],
)
ip4_via_tunnel.add_vpp_config()
ip6_via_tunnel = VppIpRoute(
self,
a6s[i],
64,
[
VppRoutePath(
"::", t.sw_if_index, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6
)
],
)
ip6_via_tunnel.add_vpp_config()
#
# Encapsulation
#
# tun_dscp copies only the dscp
# expected TC values are thus only the DCSP value is present from the
# inner
exp_tcs = [dscp, dscp, 0, 0xFC]
p_ip44_encaps = [
IP(src=self.pg0.local_ip4, dst=tun_dscp.dst, tos=tc) for tc in exp_tcs
]
p_ip64_encaps = [
IP(src=self.pg0.local_ip4, dst=tun_dscp.dst, proto="ipv6", id=0, tos=tc)
for tc in exp_tcs
]
# IPv4 in to IPv4 tunnel
self.verify_ip4ip4_encaps(a4s[0], p_ip4s, p_ip44_encaps)
# IPv6 in to IPv4 tunnel
self.verify_ip6ip4_encaps(a6s[0], p_ip6s, p_ip64_encaps)
# tun_dscp_ecn copies the dscp and the ecn
exp_tcs = [dscp, dscp_ecn, ecn, 0xFF]
p_ip44_encaps = [
IP(src=self.pg0.local_ip4, dst=tun_dscp_ecn.dst, tos=tc) for tc in exp_tcs
]
p_ip64_encaps = [
IP(src=self.pg0.local_ip4, dst=tun_dscp_ecn.dst, proto="ipv6", id=0, tos=tc)
for tc in exp_tcs
]
self.verify_ip4ip4_encaps(a4s[1], p_ip4s, p_ip44_encaps)
self.verify_ip6ip4_encaps(a6s[1], p_ip6s, p_ip64_encaps)
# tun_ecn copies only the ecn and always sets DF
exp_tcs = [0, ecn, ecn, ecn]
p_ip44_encaps = [
IP(src=self.pg0.local_ip4, dst=tun_ecn.dst, flags="DF", tos=tc)
for tc in exp_tcs
]
p_ip64_encaps = [
IP(
src=self.pg0.local_ip4,
dst=tun_ecn.dst,
flags="DF",
proto="ipv6",
id=0,
tos=tc,
)
for tc in exp_tcs
]
self.verify_ip4ip4_encaps(a4s[2], p_ip4s, p_ip44_encaps)
self.verify_ip6ip4_encaps(a6s[2], p_ip6s, p_ip64_encaps)
# tun sets a fixed dscp and copies DF
fixed_dscp = tun.dscp << 2
flags = ["DF", 0, 0, 0]
p_ip44_encaps = [
IP(src=self.pg0.local_ip4, dst=tun.dst, flags=f, tos=fixed_dscp)
for f in flags
]
p_ip64_encaps = [
IP(src=self.pg0.local_ip4, dst=tun.dst, proto="ipv6", id=0, tos=fixed_dscp)
for i in range(len(p_ip4s))
]
self.verify_ip4ip4_encaps(a4s[3], p_ip4s, p_ip44_encaps)
self.verify_ip6ip4_encaps(a6s[3], p_ip6s, p_ip64_encaps)
#
# Decapsulation
#
n_packets_decapped = 0
self.p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
# IPv4 tunnel to IPv4
tcs = [0, dscp, dscp_ecn, ecn]
# one overlay packet and all combinations of its encap
p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
p_ip4_encaps = [IP(src=tun.dst, dst=self.pg0.local_ip4, tos=tc) for tc in tcs]
# for each encap tun will produce the same inner packet because it does
# not copy up fields from the payload
for p_ip4_encap in p_ip4_encaps:
p4 = self.p_ether / p_ip4_encap / p_ip4 / self.p_payload
p4_reply = p_ip4 / self.p_payload
p4_reply.ttl -= 1
rx = self.send_and_expect(self.pg1, p4 * N_PACKETS, self.pg0)
n_packets_decapped += N_PACKETS
for p in rx:
self.validate(p[1], p4_reply)
self.assert_packet_checksums_valid(p)
err = self.statistics.get_err_counter("/err/ipip4-input/packets decapsulated")
self.assertEqual(err, n_packets_decapped)
# tun_ecn copies the ECN bits from the encap to the inner
p_ip4_encaps = [
IP(src=tun_ecn.dst, dst=self.pg0.local_ip4, tos=tc) for tc in tcs
]
p_ip4_replys = [p_ip4.copy() for i in range(len(p_ip4_encaps))]
p_ip4_replys[2].tos = ecn
p_ip4_replys[3].tos = ecn
for i, p_ip4_encap in enumerate(p_ip4_encaps):
p4 = self.p_ether / p_ip4_encap / p_ip4 / self.p_payload
p4_reply = p_ip4_replys[i] / self.p_payload
p4_reply.ttl -= 1
rx = self.send_and_expect(self.pg1, p4 * N_PACKETS, self.pg0)
n_packets_decapped += N_PACKETS
for p in rx:
self.validate(p[1], p4_reply)
self.assert_packet_checksums_valid(p)
err = self.statistics.get_err_counter("/err/ipip4-input/packets decapsulated")
self.assertEqual(err, n_packets_decapped)
# IPv4 tunnel to IPv6
# for each encap tun will produce the same inner packet because it does
# not copy up fields from the payload
p_ip4_encaps = [IP(src=tun.dst, dst=self.pg0.local_ip4, tos=tc) for tc in tcs]
p_ip6 = IPv6(src="1:2:3::4", dst=self.pg0.remote_ip6)
for p_ip4_encap in p_ip4_encaps:
p6 = self.p_ether / p_ip4_encap / p_ip6 / self.p_payload
p6_reply = p_ip6 / self.p_payload
p6_reply.hlim = 63
rx = self.send_and_expect(self.pg1, p6 * N_PACKETS, self.pg0)
n_packets_decapped += N_PACKETS
for p in rx:
self.validate(p[1], p6_reply)
self.assert_packet_checksums_valid(p)
err = self.statistics.get_err_counter("/err/ipip4-input/packets decapsulated")
self.assertEqual(err, n_packets_decapped)
# IPv4 tunnel to IPv6
# tun_ecn copies the ECN bits from the encap to the inner
p_ip4_encaps = [
IP(src=tun_ecn.dst, dst=self.pg0.local_ip4, tos=tc) for tc in tcs
]
p_ip6 = IPv6(src="1:2:3::4", dst=self.pg0.remote_ip6)
p_ip6_replys = [p_ip6.copy() for i in range(len(p_ip4_encaps))]
p_ip6_replys[2].tc = ecn
p_ip6_replys[3].tc = ecn
for i, p_ip4_encap in enumerate(p_ip4_encaps):
p6 = self.p_ether / p_ip4_encap / p_ip6 / self.p_payload
p6_reply = p_ip6_replys[i] / self.p_payload
p6_reply.hlim = 63
rx = self.send_and_expect(self.pg1, p6 * N_PACKETS, self.pg0)
n_packets_decapped += N_PACKETS
for p in rx:
self.validate(p[1], p6_reply)
self.assert_packet_checksums_valid(p)
err = self.statistics.get_err_counter("/err/ipip4-input/packets decapsulated")
self.assertEqual(err, n_packets_decapped)
#
# Fragmentation / Reassembly and Re-fragmentation
#
rv = self.vapi.ip_reassembly_enable_disable(
sw_if_index=self.pg1.sw_if_index, enable_ip4=1
)
self.vapi.ip_reassembly_set(
timeout_ms=1000,
max_reassemblies=1000,
max_reassembly_length=1000,
expire_walk_interval_ms=10000,
is_ip6=0,
)
# Send lots of fragments, verify reassembled packet
frags, p4_reply = self.generate_ip4_frags(3131, 1400)
f = []
for i in range(0, 1000):
f.extend(frags)
self.pg1.add_stream(f)
self.pg_enable_capture()
self.pg_start()
rx = self.pg0.get_capture(1000)
n_packets_decapped += 1000
for p in rx:
self.validate(p[1], p4_reply)
err = self.statistics.get_err_counter("/err/ipip4-input/packets decapsulated")
self.assertEqual(err, n_packets_decapped)
f = []
r = []
for i in range(1, 90):
frags, p4_reply = self.generate_ip4_frags(i * 100, 1000)
f.extend(frags)
r.extend(p4_reply)
self.pg_enable_capture()
self.pg1.add_stream(f)
self.pg_start()
rx = self.pg0.get_capture(89)
i = 0
for p in rx:
self.validate(p[1], r[i])
i += 1
# Now try with re-fragmentation
#
# Send fragments to tunnel head-end, for the tunnel head end
# to reassemble and then refragment
#
self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [576, 0, 0, 0])
frags, p4_reply = self.generate_ip4_frags(3123, 1200)
self.pg_enable_capture()
self.pg1.add_stream(frags)
self.pg_start()
rx = self.pg0.get_capture(6)
reass_pkt = reassemble4(rx)
p4_reply.id = 256
self.validate(reass_pkt, p4_reply)
self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [1600, 0, 0, 0])
frags, p4_reply = self.generate_ip4_frags(3123, 1200)
self.pg_enable_capture()
self.pg1.add_stream(frags)
self.pg_start()
rx = self.pg0.get_capture(2)
reass_pkt = reassemble4(rx)
p4_reply.id = 512
self.validate(reass_pkt, p4_reply)
# send large packets through the tunnel, expect them to be fragmented
self.vapi.sw_interface_set_mtu(tun_dscp.sw_if_index, [600, 0, 0, 0])
p4 = (
Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
/ IP(src="1.2.3.4", dst="130.67.0.1", tos=42)
/ UDP(sport=1234, dport=1234)
/ Raw(b"Q" * 1000)
)
rx = self.send_and_expect(self.pg0, p4 * 15, self.pg1, 30)
inners = []
for p in rx:
inners.append(p[IP].payload)
reass_pkt = reassemble4(inners)
for p in reass_pkt:
self.assert_packet_checksums_valid(p)
self.assertEqual(p[IP].ttl, 63)
def test_ipip_create(self):
"""ipip create / delete interface test"""
rv = ipip_add_tunnel(self, "1.2.3.4", "2.3.4.5")
sw_if_index = rv.sw_if_index
self.vapi.ipip_del_tunnel(sw_if_index)
def test_ipip_vrf_create(self):
"""ipip create / delete interface VRF test"""
t = VppIpTable(self, 20)
t.add_vpp_config()
rv = ipip_add_tunnel(self, "1.2.3.4", "2.3.4.5", table_id=20)
sw_if_index = rv.sw_if_index
self.vapi.ipip_del_tunnel(sw_if_index)
def payload(self, len):
return "x" * len
def test_mipip4(self):
"""p2mp IPv4 tunnel Tests"""
for itf in self.pg_interfaces[:2]:
#
# one underlay nh for each overlay/tunnel peer
#
itf.generate_remote_hosts(4)
itf.configure_ipv4_neighbors()
#
# Create an p2mo IPIP tunnel.
# - set it admin up
# - assign an IP Addres
# - Add a route via the tunnel
#
ipip_if = VppIpIpTunInterface(
self,
itf,
itf.local_ip4,
"0.0.0.0",
mode=(VppEnum.vl_api_tunnel_mode_t.TUNNEL_API_MODE_MP),
)
ipip_if.add_vpp_config()
ipip_if.admin_up()
ipip_if.config_ip4()
ipip_if.generate_remote_hosts(4)
self.logger.info(self.vapi.cli("sh adj"))
self.logger.info(self.vapi.cli("sh ip fib"))
#
# ensure we don't match to the tunnel if the source address
# is all zeros
#
# tx = self.create_tunnel_stream_4o4(self.pg0,
# "0.0.0.0",
# itf.local_ip4,
# self.pg0.local_ip4,
# self.pg0.remote_ip4)
# self.send_and_assert_no_replies(self.pg0, tx)
#
# for-each peer
#
for ii in range(1, 4):
route_addr = "4.4.4.%d" % ii
#
# route traffic via the peer
#
route_via_tun = VppIpRoute(
self,
route_addr,
32,
[VppRoutePath(ipip_if._remote_hosts[ii].ip4, ipip_if.sw_if_index)],
)
route_via_tun.add_vpp_config()
#
# Add a TEIB entry resolves the peer
#
teib = VppTeib(
self,
ipip_if,
ipip_if._remote_hosts[ii].ip4,
itf._remote_hosts[ii].ip4,
)
teib.add_vpp_config()
self.logger.info(
self.vapi.cli("sh adj nbr ipip0 %s" % ipip_if._remote_hosts[ii].ip4)
)
#
# Send a packet stream that is routed into the tunnel
# - packets are IPIP encapped
#
inner = (
IP(dst=route_addr, src="5.5.5.5")
/ UDP(sport=1234, dport=1234)
/ Raw(b"0x44" * 100)
)
tx_e = [
(Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / inner)
for x in range(63)
]
rxs = self.send_and_expect(self.pg0, tx_e, itf)
for rx in rxs:
self.assertEqual(rx[IP].src, itf.local_ip4)
self.assertEqual(rx[IP].dst, itf._remote_hosts[ii].ip4)
tx_i = [
(
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IP(src=itf._remote_hosts[ii].ip4, dst=itf.local_ip4)
/ IP(src=self.pg0.local_ip4, dst=self.pg0.remote_ip4)
/ UDP(sport=1234, dport=1234)
/ Raw(b"0x44" * 100)
)
for x in range(63)
]
self.logger.info(self.vapi.cli("sh ipip tunnel-hash"))
rx = self.send_and_expect(self.pg0, tx_i, self.pg0)
#
# delete and re-add the TEIB
#
teib.remove_vpp_config()
self.send_and_assert_no_replies(self.pg0, tx_e)
self.send_and_assert_no_replies(self.pg0, tx_i)
teib.add_vpp_config()
rx = self.send_and_expect(self.pg0, tx_e, itf)
for rx in rxs:
self.assertEqual(rx[IP].src, itf.local_ip4)
self.assertEqual(rx[IP].dst, itf._remote_hosts[ii].ip4)
rx = self.send_and_expect(self.pg0, tx_i, self.pg0)
#
# we can also send to the peer's address
#
inner = (
IP(dst=teib.peer, src="5.5.5.5")
/ UDP(sport=1234, dport=1234)
/ Raw(b"0x44" * 100)
)
tx_e = [
(Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / inner)
for x in range(63)
]
rxs = self.send_and_expect(self.pg0, tx_e, itf)
#
# with all of the peers in place, swap the ip-table of
# the ipip interface
#
table = VppIpTable(self, 2)
table.add_vpp_config()
ipip_if.unconfig_ip4()
ipip_if.set_table_ip4(self.table.table_id)
ipip_if.config_ip4()
#
# we should still be able to reach the peers from the new table
#
inner = (
IP(dst=teib.peer, src="5.5.5.5")
/ UDP(sport=1234, dport=1234)
/ Raw(b"0x44" * 100)
)
tx_e = [
(Ether(dst=self.pg2.local_mac, src=self.pg0.remote_mac) / inner)
for x in range(63)
]
rxs = self.send_and_expect(self.pg2, tx_e, itf)
ipip_if.admin_down()
ipip_if.unconfig_ip4()
ipip_if.set_table_ip4(0)
class TestIPIP6(VppTestCase):
"""IPIP6 Test Case"""
@classmethod
def setUpClass(cls):
super(TestIPIP6, cls).setUpClass()
cls.create_pg_interfaces(range(2))
cls.interfaces = list(cls.pg_interfaces)
@classmethod
def tearDownClass(cls):
super(TestIPIP6, cls).tearDownClass()
def setUp(self):
super(TestIPIP6, self).setUp()
for i in self.interfaces:
i.admin_up()
i.config_ip4()
i.config_ip6()
i.disable_ipv6_ra()
i.resolve_arp()
i.resolve_ndp()
self.setup_tunnel()
def tearDown(self):
if not self.vpp_dead:
self.destroy_tunnel()
for i in self.pg_interfaces:
i.unconfig_ip4()
i.unconfig_ip6()
i.admin_down()
super(TestIPIP6, self).tearDown()
def setup_tunnel(self):
# IPv6 transport
rv = ipip_add_tunnel(self, self.pg0.local_ip6, self.pg1.remote_ip6)
sw_if_index = rv.sw_if_index
self.tunnel_if_index = sw_if_index
self.vapi.sw_interface_set_flags(sw_if_index, 1)
self.vapi.sw_interface_set_unnumbered(
sw_if_index=self.pg0.sw_if_index, unnumbered_sw_if_index=sw_if_index
)
# Add IPv4 and IPv6 routes via tunnel interface
ip4_via_tunnel = VppIpRoute(
self,
"130.67.0.0",
16,
[
VppRoutePath(
"0.0.0.0", sw_if_index, proto=FibPathProto.FIB_PATH_NH_PROTO_IP4
)
],
)
ip4_via_tunnel.add_vpp_config()
ip6_via_tunnel = VppIpRoute(
self,
"dead::",
16,
[VppRoutePath("::", sw_if_index, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6)],
)
ip6_via_tunnel.add_vpp_config()
self.tunnel_ip6_via_tunnel = ip6_via_tunnel
self.tunnel_ip4_via_tunnel = ip4_via_tunnel
def destroy_tunnel(self):
# IPv6 transport
self.tunnel_ip4_via_tunnel.remove_vpp_config()
self.tunnel_ip6_via_tunnel.remove_vpp_config()
rv = self.vapi.ipip_del_tunnel(sw_if_index=self.tunnel_if_index)
def validate(self, rx, expected):
self.assertEqual(rx, expected.__class__(expected))
def generate_ip6_frags(self, payload_length, fragment_size):
p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
p_payload = UDP(sport=1234, dport=1234) / self.payload(payload_length)
p_ip6 = IPv6(src="1::1", dst=self.pg0.remote_ip6)
outer_ip6 = (
p_ether
/ IPv6(src=self.pg1.remote_ip6, dst=self.pg0.local_ip6)
/ IPv6ExtHdrFragment()
/ p_ip6
/ p_payload
)
frags = fragment6(outer_ip6, fragment_size)
p6_reply = p_ip6 / p_payload
p6_reply.hlim -= 1
return frags, p6_reply
def generate_ip6_hairpin_frags(self, payload_length, fragment_size):
p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
p_payload = UDP(sport=1234, dport=1234) / self.payload(payload_length)
p_ip6 = IPv6(src="1::1", dst="dead::1")
outer_ip6 = (
p_ether
/ IPv6(src=self.pg1.remote_ip6, dst=self.pg0.local_ip6)
/ IPv6ExtHdrFragment()
/ p_ip6
/ p_payload
)
frags = fragment6(outer_ip6, fragment_size)
p_ip6.hlim -= 1
p6_reply = (
IPv6(src=self.pg0.local_ip6, dst=self.pg1.remote_ip6, hlim=63)
/ p_ip6
/ p_payload
)
return frags, p6_reply
def test_encap(self):
"""ip{v4,v6} over ip6 test encap"""
p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
p_ip6 = IPv6(src="1::1", dst="DEAD::1", tc=42, nh="UDP")
p_ip4 = IP(src="1.2.3.4", dst="130.67.0.1", tos=42)
p_payload = UDP(sport=1234, dport=1234)
# Encapsulation
# IPv6 in to IPv6 tunnel
p6 = p_ether / p_ip6 / p_payload
p6_reply = (
IPv6(src=self.pg0.local_ip6, dst=self.pg1.remote_ip6, hlim=64)
/ p_ip6
/ p_payload
)
p6_reply[1].hlim -= 1
rx = self.send_and_expect(self.pg0, p6 * 11, self.pg1)
for p in rx:
self.validate(p[1], p6_reply)
# IPv4 in to IPv6 tunnel
p4 = p_ether / p_ip4 / p_payload
p4_reply = (
IPv6(src=self.pg0.local_ip6, dst=self.pg1.remote_ip6, hlim=64)
/ p_ip4
/ p_payload
)
p4_reply[1].ttl -= 1
rx = self.send_and_expect(self.pg0, p4 * 11, self.pg1)
for p in rx:
self.validate(p[1], p4_reply)
def test_decap(self):
"""ip{v4,v6} over ip6 test decap"""
p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
p_ip6 = IPv6(src="1::1", dst="DEAD::1", tc=42, nh="UDP")
p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
p_payload = UDP(sport=1234, dport=1234)
# Decapsulation
# IPv6 tunnel to IPv4
p4 = (
p_ether
/ IPv6(src=self.pg1.remote_ip6, dst=self.pg0.local_ip6)
/ p_ip4
/ p_payload
)
p4_reply = p_ip4 / p_payload
p4_reply.ttl -= 1
rx = self.send_and_expect(self.pg1, p4 * 11, self.pg0)
for p in rx:
self.validate(p[1], p4_reply)
# IPv6 tunnel to IPv6
p_ip6 = IPv6(src="1:2:3::4", dst=self.pg0.remote_ip6)
p6 = (
p_ether
/ IPv6(src=self.pg1.remote_ip6, dst=self.pg0.local_ip6)
/ p_ip6
/ p_payload
)
p6_reply = p_ip6 / p_payload
p6_reply.hlim = 63
rx = self.send_and_expect(self.pg1, p6 * 11, self.pg0)
for p in rx:
self.validate(p[1], p6_reply)
def verify_ip4ip6_encaps(self, a, p_ip4s, p_ip6_encaps):
for i, p_ip4 in enumerate(p_ip4s):
p_ip4.dst = a
p4 = self.p_ether / p_ip4 / self.p_payload
p_ip4_inner = p_ip4
p_ip4_inner.ttl -= 1
p6_reply = p_ip6_encaps[i] / p_ip4_inner / self.p_payload
rx = self.send_and_expect(self.pg0, p4 * N_PACKETS, self.pg1)
for p in rx:
self.validate(p[1], p6_reply)
self.assert_packet_checksums_valid(p)
def verify_ip6ip6_encaps(self, a, p_ip6s, p_ip6_encaps):
for i, p_ip6 in enumerate(p_ip6s):
p_ip6.dst = a
p6 = self.p_ether / p_ip6 / self.p_payload
p_inner_ip6 = p_ip6
p_inner_ip6.hlim -= 1
p6_reply = p_ip6_encaps[i] / p_inner_ip6 / self.p_payload
rx = self.send_and_expect(self.pg0, p6 * N_PACKETS, self.pg1)
for p in rx:
self.validate(p[1], p6_reply)
self.assert_packet_checksums_valid(p)
def test_ipip6(self):
"""ip{v4,v6} over ip6 test"""
# that's annoying
self.destroy_tunnel()
self.pg1.generate_remote_hosts(5)
self.pg1.configure_ipv6_neighbors()
e = VppEnum.vl_api_tunnel_encap_decap_flags_t
d = VppEnum.vl_api_ip_dscp_t
self.p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
self.p_payload = UDP(sport=1234, dport=1234) / Raw(b"X" * 100)
# create a TOS byte by shifting a DSCP code point 2 bits. those 2 bits
# are for the ECN.
dscp = d.IP_API_DSCP_AF31 << 2
ecn = 3
dscp_ecn = d.IP_API_DSCP_AF31 << 2 | ecn
# IPv4 transport that copies the DCSP from the payload
tun_dscp = VppIpIpTunInterface(
self,
self.pg0,
self.pg0.local_ip6,
self.pg1.remote_hosts[0].ip6,
flags=e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP,
)
tun_dscp.add_vpp_config()
# IPv4 transport that copies the DCSP and ECN from the payload
tun_dscp_ecn = VppIpIpTunInterface(
self,
self.pg0,
self.pg0.local_ip6,
self.pg1.remote_hosts[1].ip6,
flags=(
e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP
| e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN
),
)
tun_dscp_ecn.add_vpp_config()
# IPv4 transport that copies the ECN from the payload and sets the
# DF bit on encap. copies the ECN on decap
tun_ecn = VppIpIpTunInterface(
self,
self.pg0,
self.pg0.local_ip6,
self.pg1.remote_hosts[2].ip6,
flags=(
e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN
| e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_SET_DF
| e.TUNNEL_API_ENCAP_DECAP_FLAG_DECAP_COPY_ECN
),
)
tun_ecn.add_vpp_config()
# IPv4 transport that sets a fixed DSCP in the encap and copies
# the DF bit
tun = VppIpIpTunInterface(
self,
self.pg0,
self.pg0.local_ip6,
self.pg1.remote_hosts[3].ip6,
dscp=d.IP_API_DSCP_AF11,
flags=e.TUNNEL_API_ENCAP_DECAP_FLAG_ENCAP_COPY_DF,
)
tun.add_vpp_config()
# array of all the tunnels
tuns = [tun_dscp, tun_dscp_ecn, tun_ecn, tun]
# addresses for prefixes routed via each tunnel
a4s = ["" for i in range(len(tuns))]
a6s = ["" for i in range(len(tuns))]
# IP headers for inner packets with each combination of DSCp/ECN tested
p_ip6s = [
IPv6(src="1::1", dst="DEAD::1", nh="UDP", tc=dscp),
IPv6(src="1::1", dst="DEAD::1", nh="UDP", tc=dscp_ecn),
IPv6(src="1::1", dst="DEAD::1", nh="UDP", tc=ecn),
IPv6(src="1::1", dst="DEAD::1", nh="UDP", tc=0xFF),
]
p_ip4s = [
IP(src="1.2.3.4", dst="130.67.0.1", tos=dscp, flags="DF"),
IP(src="1.2.3.4", dst="130.67.0.1", tos=dscp_ecn),
IP(src="1.2.3.4", dst="130.67.0.1", tos=ecn),
IP(src="1.2.3.4", dst="130.67.0.1", tos=0xFF),
]
# Configure each tunnel
for i, t in enumerate(tuns):
# Set interface up and enable IP on it
self.vapi.sw_interface_set_flags(t.sw_if_index, 1)
self.vapi.sw_interface_set_unnumbered(
sw_if_index=self.pg0.sw_if_index, unnumbered_sw_if_index=t.sw_if_index
)
# prefix for route / destination address for packets
a4s[i] = "130.67.%d.0" % i
a6s[i] = "dead:%d::" % i
# Add IPv4 and IPv6 routes via tunnel interface
ip4_via_tunnel = VppIpRoute(
self,
a4s[i],
24,
[
VppRoutePath(
"0.0.0.0",
t.sw_if_index,
proto=FibPathProto.FIB_PATH_NH_PROTO_IP4,
)
],
)
ip4_via_tunnel.add_vpp_config()
ip6_via_tunnel = VppIpRoute(
self,
a6s[i],
64,
[
VppRoutePath(
"::", t.sw_if_index, proto=FibPathProto.FIB_PATH_NH_PROTO_IP6
)
],
)
ip6_via_tunnel.add_vpp_config()
#
# Encapsulation
#
# tun_dscp copies only the dscp
# expected TC values are thus only the DCSP value is present from the
# inner
exp_tcs = [dscp, dscp, 0, 0xFC]
p_ip6_encaps = [
IPv6(src=self.pg0.local_ip6, dst=tun_dscp.dst, tc=tc) for tc in exp_tcs
]
# IPv4 in to IPv4 tunnel
self.verify_ip4ip6_encaps(a4s[0], p_ip4s, p_ip6_encaps)
# IPv6 in to IPv4 tunnel
self.verify_ip6ip6_encaps(a6s[0], p_ip6s, p_ip6_encaps)
# tun_dscp_ecn copies the dscp and the ecn
exp_tcs = [dscp, dscp_ecn, ecn, 0xFF]
p_ip6_encaps = [
IPv6(src=self.pg0.local_ip6, dst=tun_dscp_ecn.dst, tc=tc) for tc in exp_tcs
]
self.verify_ip4ip6_encaps(a4s[1], p_ip4s, p_ip6_encaps)
self.verify_ip6ip6_encaps(a6s[1], p_ip6s, p_ip6_encaps)
# tun_ecn copies only the ecn and always sets DF
exp_tcs = [0, ecn, ecn, ecn]
p_ip6_encaps = [
IPv6(src=self.pg0.local_ip6, dst=tun_ecn.dst, tc=tc) for tc in exp_tcs
]
self.verify_ip4ip6_encaps(a4s[2], p_ip4s, p_ip6_encaps)
self.verify_ip6ip6_encaps(a6s[2], p_ip6s, p_ip6_encaps)
# tun sets a fixed dscp
fixed_dscp = tun.dscp << 2
p_ip6_encaps = [
IPv6(src=self.pg0.local_ip6, dst=tun.dst, tc=fixed_dscp)
for i in range(len(p_ip4s))
]
self.verify_ip4ip6_encaps(a4s[3], p_ip4s, p_ip6_encaps)
self.verify_ip6ip6_encaps(a6s[3], p_ip6s, p_ip6_encaps)
#
# Decapsulation
#
n_packets_decapped = self.statistics.get_err_counter(
"/err/ipip6-input/packets decapsulated"
)
self.p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
# IPv6 tunnel to IPv4
tcs = [0, dscp, dscp_ecn, ecn]
# one overlay packet and all combinations of its encap
p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
p_ip6_encaps = [IPv6(src=tun.dst, dst=self.pg0.local_ip6, tc=tc) for tc in tcs]
# for each encap tun will produce the same inner packet because it does
# not copy up fields from the payload
for p_ip6_encap in p_ip6_encaps:
p6 = self.p_ether / p_ip6_encap / p_ip4 / self.p_payload
p4_reply = p_ip4 / self.p_payload
p4_reply.ttl -= 1
rx = self.send_and_expect(self.pg1, p6 * N_PACKETS, self.pg0)
n_packets_decapped += N_PACKETS
for p in rx:
self.validate(p[1], p4_reply)
self.assert_packet_checksums_valid(p)
err = self.statistics.get_err_counter("/err/ipip6-input/packets decapsulated")
self.assertEqual(err, n_packets_decapped)
# tun_ecn copies the ECN bits from the encap to the inner
p_ip6_encaps = [
IPv6(src=tun_ecn.dst, dst=self.pg0.local_ip6, tc=tc) for tc in tcs
]
p_ip4_replys = [p_ip4.copy() for i in range(len(p_ip6_encaps))]
p_ip4_replys[2].tos = ecn
p_ip4_replys[3].tos = ecn
for i, p_ip6_encap in enumerate(p_ip6_encaps):
p6 = self.p_ether / p_ip6_encap / p_ip4 / self.p_payload
p4_reply = p_ip4_replys[i] / self.p_payload
p4_reply.ttl -= 1
rx = self.send_and_expect(self.pg1, p6 * N_PACKETS, self.pg0)
n_packets_decapped += N_PACKETS
for p in rx:
self.validate(p[1], p4_reply)
self.assert_packet_checksums_valid(p)
err = self.statistics.get_err_counter("/err/ipip6-input/packets decapsulated")
self.assertEqual(err, n_packets_decapped)
# IPv6 tunnel to IPv6
# for each encap tun will produce the same inner packet because it does
# not copy up fields from the payload
p_ip6_encaps = [IPv6(src=tun.dst, dst=self.pg0.local_ip6, tc=tc) for tc in tcs]
p_ip6 = IPv6(src="1:2:3::4", dst=self.pg0.remote_ip6)
for p_ip6_encap in p_ip6_encaps:
p6 = self.p_ether / p_ip6_encap / p_ip6 / self.p_payload
p6_reply = p_ip6 / self.p_payload
p6_reply.hlim = 63
rx = self.send_and_expect(self.pg1, p6 * N_PACKETS, self.pg0)
n_packets_decapped += N_PACKETS
for p in rx:
self.validate(p[1], p6_reply)
self.assert_packet_checksums_valid(p)
err = self.statistics.get_err_counter("/err/ipip6-input/packets decapsulated")
self.assertEqual(err, n_packets_decapped)
# IPv6 tunnel to IPv6
# tun_ecn copies the ECN bits from the encap to the inner
p_ip6_encaps = [
IPv6(src=tun_ecn.dst, dst=self.pg0.local_ip6, tc=tc) for tc in tcs
]
p_ip6 = IPv6(src="1:2:3::4", dst=self.pg0.remote_ip6)
p_ip6_replys = [p_ip6.copy() for i in range(len(p_ip6_encaps))]
p_ip6_replys[2].tc = ecn
p_ip6_replys[3].tc = ecn
for i, p_ip6_encap in enumerate(p_ip6_encaps):
p6 = self.p_ether / p_ip6_encap / p_ip6 / self.p_payload
p6_reply = p_ip6_replys[i] / self.p_payload
p6_reply.hlim = 63
rx = self.send_and_expect(self.pg1, p6 * N_PACKETS, self.pg0)
n_packets_decapped += N_PACKETS
for p in rx:
self.validate(p[1], p6_reply)
self.assert_packet_checksums_valid(p)
err = self.statistics.get_err_counter("/err/ipip6-input/packets decapsulated")
self.assertEqual(err, n_packets_decapped)
def test_frag(self):
"""ip{v4,v6} over ip6 test frag"""
p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
p_ip6 = IPv6(src="1::1", dst="DEAD::1", tc=42, nh="UDP")
p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
p_payload = UDP(sport=1234, dport=1234)
#
# Fragmentation / Reassembly and Re-fragmentation
#
rv = self.vapi.ip_reassembly_enable_disable(
sw_if_index=self.pg1.sw_if_index, enable_ip6=1
)
self.vapi.ip_reassembly_set(
timeout_ms=1000,
max_reassemblies=1000,
max_reassembly_length=1000,
expire_walk_interval_ms=10000,
is_ip6=1,
)
# Send lots of fragments, verify reassembled packet
before_cnt = self.statistics.get_err_counter(
"/err/ipip6-input/packets decapsulated"
)
frags, p6_reply = self.generate_ip6_frags(3131, 1400)
f = []
for i in range(0, 1000):
f.extend(frags)
self.pg1.add_stream(f)
self.pg_enable_capture()
self.pg_start()
rx = self.pg0.get_capture(1000)
for p in rx:
self.validate(p[1], p6_reply)
cnt = self.statistics.get_err_counter("/err/ipip6-input/packets decapsulated")
self.assertEqual(cnt, before_cnt + 1000)
f = []
r = []
# TODO: Check out why reassembly of atomic fragments don't work
for i in range(10, 90):
frags, p6_reply = self.generate_ip6_frags(i * 100, 1000)
f.extend(frags)
r.extend(p6_reply)
self.pg_enable_capture()
self.pg1.add_stream(f)
self.pg_start()
rx = self.pg0.get_capture(80)
i = 0
for p in rx:
self.validate(p[1], r[i])
i += 1
# Simple fragmentation
p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [1280, 0, 0, 0])
# IPv6 in to IPv6 tunnel
p_payload = UDP(sport=1234, dport=1234) / self.payload(1300)
p6 = p_ether / p_ip6 / p_payload
p6_reply = (
IPv6(src=self.pg0.local_ip6, dst=self.pg1.remote_ip6, hlim=63)
/ p_ip6
/ p_payload
)
p6_reply[1].hlim -= 1
self.pg_enable_capture()
self.pg0.add_stream(p6)
self.pg_start()
rx = self.pg1.get_capture(2)
# Scapy defragment doesn't deal well with multiple layers
# of same type / Ethernet header first
f = [p[1] for p in rx]
reass_pkt = defragment6(f)
self.validate(reass_pkt, p6_reply)
# Now try with re-fragmentation
#
# Send large fragments to tunnel head-end, for the tunnel head end
# to reassemble and then refragment out the tunnel again.
# Hair-pinning
#
self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [1280, 0, 0, 0])
frags, p6_reply = self.generate_ip6_hairpin_frags(8000, 1200)
self.pg_enable_capture()
self.pg1.add_stream(frags)
self.pg_start()
rx = self.pg1.get_capture(7)
f = [p[1] for p in rx]
reass_pkt = defragment6(f)
p6_reply.id = 256
self.validate(reass_pkt, p6_reply)
def test_ip6_mpls_frag(self):
"""Test fragmenting IPv6 over MPLS"""
# IPv6 packets must be locally generated to be fragmented
# the use of tunnel encaps
tun_dst = VppIpRoute(
self,
"1000::1",
128,
[
VppRoutePath(
self.pg1.remote_ip6, self.pg1.sw_if_index, labels=[VppMplsLabel(32)]
)
],
).add_vpp_config()
tun = VppIpIpTunInterface(
self, self.pg0, self.pg0.local_ip6, "1000::1"
).add_vpp_config()
tun.admin_up()
tun.config_ip6()
tun.config_ip4()
self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, [2000, 0, 0, 0])
p_6k = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IPv6(src=self.pg0.remote_ip6, dst=tun.remote_ip6)
/ UDP(sport=1234, dport=5678)
/ Raw(b"0xa" * 2000)
)
p_2k = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IPv6(src=self.pg0.remote_ip6, dst=tun.remote_ip6)
/ UDP(sport=1234, dport=5678)
/ Raw(b"0xa" * 1000)
)
p_1k = (
Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac)
/ IPv6(src=self.pg0.remote_ip6, dst=tun.remote_ip6)
/ UDP(sport=1234, dport=5678)
/ Raw(b"0xa" * 600)
)
# this is now the interface MTU frags
rxs = self.send_and_expect(self.pg0, [p_6k], self.pg1, n_rx=4)
self.assertEqual(rxs[0][UDP].dport, 5678)
for rx in rxs:
self.assertEqual(rx[MPLS].label, 32)
self.assertEqual(rx[IPv6].dst, "1000::1")
self.assertEqual(rx[IPv6].dst, "1000::1")
self.send_and_expect(self.pg0, [p_2k], self.pg1, n_rx=2)
self.send_and_expect(self.pg0, [p_1k], self.pg1)
def test_ipip_create(self):
"""ipip create / delete interface test"""
rv = ipip_add_tunnel(self, "1.2.3.4", "2.3.4.5")
sw_if_index = rv.sw_if_index
self.vapi.ipip_del_tunnel(sw_if_index)
def test_ipip_vrf_create(self):
"""ipip create / delete interface VRF test"""
t = VppIpTable(self, 20)
t.add_vpp_config()
rv = ipip_add_tunnel(self, "1.2.3.4", "2.3.4.5", table_id=20)
sw_if_index = rv.sw_if_index
self.vapi.ipip_del_tunnel(sw_if_index)
def payload(self, len):
return "x" * len
class TestIPIPMPLS(VppTestCase):
"""MPLS Test Case"""
@classmethod
def setUpClass(cls):
super(TestIPIPMPLS, cls).setUpClass()
cls.create_pg_interfaces(range(2))
cls.interfaces = list(cls.pg_interfaces)
@classmethod
def tearDownClass(cls):
super(TestIPIPMPLS, cls).tearDownClass()
def setUp(self):
super(TestIPIPMPLS, self).setUp()
for i in self.interfaces:
i.admin_up()
i.config_ip4()
i.config_ip6()
i.disable_ipv6_ra()
i.resolve_arp()
i.resolve_ndp()
def tearDown(self):
super(TestIPIPMPLS, self).tearDown()
for i in self.pg_interfaces:
i.unconfig_ip4()
i.unconfig_ip6()
i.admin_down()
def test_mpls(self):
"""MPLS over ip{6,4} test"""
tbl = VppMplsTable(self, 0)
tbl.add_vpp_config()
self.p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
self.p_payload = UDP(sport=1234, dport=1234) / Raw(b"X" * 100)
f = FibPathProto
# IPv4 transport
tun4 = VppIpIpTunInterface(
self, self.pg1, self.pg1.local_ip4, self.pg1.remote_ip4
).add_vpp_config()
tun4.admin_up()
tun4.config_ip4()
tun4.enable_mpls()
# IPv6 transport
tun6 = VppIpIpTunInterface(
self, self.pg1, self.pg1.local_ip6, self.pg1.remote_ip6
).add_vpp_config()
tun6.admin_up()
tun6.config_ip6()
tun6.enable_mpls()
# ip routes into the tunnels with output labels
r4 = VppIpRoute(
self,
"1.1.1.1",
32,
[
VppRoutePath(
tun4.remote_ip4, tun4.sw_if_index, labels=[VppMplsLabel(44)]
)
],
).add_vpp_config()
r6 = VppIpRoute(
self,
"1::1",
128,
[
VppRoutePath(
tun6.remote_ip6, tun6.sw_if_index, labels=[VppMplsLabel(66)]
)
],
).add_vpp_config()
# deag MPLS routes from the tunnel
r4 = VppMplsRoute(
self, 44, 1, [VppRoutePath(self.pg0.remote_ip4, self.pg0.sw_if_index)]
).add_vpp_config()
r6 = VppMplsRoute(
self,
66,
1,
[VppRoutePath(self.pg0.remote_ip6, self.pg0.sw_if_index)],
eos_proto=f.FIB_PATH_NH_PROTO_IP6,
).add_vpp_config()
#
# Tunnel Encap
#
p4 = self.p_ether / IP(src="2.2.2.2", dst="1.1.1.1") / self.p_payload
rxs = self.send_and_expect(self.pg0, p4 * N_PACKETS, self.pg1)
for rx in rxs:
self.assertEqual(rx[IP].src, self.pg1.local_ip4)
self.assertEqual(rx[IP].dst, self.pg1.remote_ip4)
self.assertEqual(rx[MPLS].label, 44)
inner = rx[MPLS].payload
self.assertEqual(inner.src, "2.2.2.2")
self.assertEqual(inner.dst, "1.1.1.1")
p6 = self.p_ether / IPv6(src="2::2", dst="1::1") / self.p_payload
rxs = self.send_and_expect(self.pg0, p6 * N_PACKETS, self.pg1)
for rx in rxs:
self.assertEqual(rx[IPv6].src, self.pg1.local_ip6)
self.assertEqual(rx[IPv6].dst, self.pg1.remote_ip6)
self.assertEqual(rx[MPLS].label, 66)
inner = rx[MPLS].payload
self.assertEqual(inner.src, "2::2")
self.assertEqual(inner.dst, "1::1")
#
# Tunnel Decap
#
p4 = (
Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
/ IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4)
/ MPLS(label=44, ttl=4)
/ IP(src="1.1.1.1", dst="2.2.2.2")
/ self.p_payload
)
rxs = self.send_and_expect(self.pg1, p4 * N_PACKETS, self.pg0)
for rx in rxs:
self.assertEqual(rx[IP].src, "1.1.1.1")
self.assertEqual(rx[IP].dst, "2.2.2.2")
p6 = (
Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
/ IPv6(src=self.pg1.remote_ip6, dst=self.pg1.local_ip6)
/ MPLS(label=66, ttl=4)
/ IPv6(src="1::1", dst="2::2")
/ self.p_payload
)
rxs = self.send_and_expect(self.pg1, p6 * N_PACKETS, self.pg0)
for rx in rxs:
self.assertEqual(rx[IPv6].src, "1::1")
self.assertEqual(rx[IPv6].dst, "2::2")
tun4.disable_mpls()
tun6.disable_mpls()
if __name__ == "__main__":
unittest.main(testRunner=VppTestRunner)
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