-#!/usr/bin/env python
+#!/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
+from scapy.layers.inet6 import IPv6, Ether, IP, UDP, IPv6ExtHdrFragment, Raw
from scapy.all import fragment, fragment6, RandShort, defragment6
from framework import VppTestCase, VppTestRunner
from vpp_ip import DpoProto
-from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable
+from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable, FibPathProto
+from vpp_ipip_tun_interface import VppIpIpTunInterface
+from vpp_papi import VppEnum
from socket import AF_INET, AF_INET6, inet_pton
from util import reassemble4
"""
+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 """
cls.create_pg_interfaces(range(2))
cls.interfaces = list(cls.pg_interfaces)
+ @classmethod
+ def tearDownClass(cls):
+ super(TestIPIP, cls).tearDownClass()
+
def setUp(self):
super(TestIPIP, self).setUp()
for i in self.interfaces:
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 """
- p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
- p_ip6 = IPv6(src="1::1", dst="DEAD::1", nh='UDP', tc=42)
- p_ip4 = IP(src="1.2.3.4", dst="130.67.0.1", tos=42)
- p_payload = UDP(sport=1234, dport=1234)
- # IPv4 transport
- rv = self.vapi.ipip_add_tunnel(
- src_address=self.pg0.local_ip4n,
- dst_address=self.pg1.remote_ip4n,
- is_ipv6=0, tc_tos=0xFF)
- sw_if_index = rv.sw_if_index
+ self.pg1.generate_remote_hosts(5)
+ self.pg1.configure_ipv4_neighbors()
+ e = VppEnum.vl_api_ipip_tunnel_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.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_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.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_DSCP |
+ e.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_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.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_ECN |
+ e.IPIP_TUNNEL_API_FLAG_ENCAP_SET_DF |
+ e.IPIP_TUNNEL_API_FLAG_DECAP_COPY_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.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_DF).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()
- # Set interface up and enable IP on it
- 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=DpoProto.DPO_PROTO_IP4)], is_ip6=0)
- ip4_via_tunnel.add_vpp_config()
-
- ip6_via_tunnel = VppIpRoute(
- self, "dead::", 16,
- [VppRoutePath("::",
- sw_if_index,
- proto=DpoProto.DPO_PROTO_IP6)], is_ip6=1)
- ip6_via_tunnel.add_vpp_config()
+ #
+ # Encapsulation
+ #
- # IPv6 in to IPv4 tunnel
- p6 = (p_ether / p_ip6 / p_payload)
- p_inner_ip6 = p_ip6
- p_inner_ip6.hlim -= 1
- p6_reply = (IP(src=self.pg0.local_ip4, dst=self.pg1.remote_ip4,
- proto='ipv6', id=0, tos=42) / p_inner_ip6 / p_payload)
- p6_reply.ttl -= 1
- rx = self.send_and_expect(self.pg0, p6 * 10, self.pg1)
- for p in rx:
- self.validate(p[1], p6_reply)
+ # 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
- p4 = (p_ether / p_ip4 / p_payload)
- p_ip4_inner = p_ip4
- p_ip4_inner.ttl -= 1
- p4_reply = (IP(src=self.pg0.local_ip4, dst=self.pg1.remote_ip4,
- tos=42) /
- p_ip4_inner / p_payload)
- p4_reply.ttl -= 1
- p4_reply.id = 0
- rx = self.send_and_expect(self.pg0, p4 * 10, self.pg1)
- for p in rx:
- self.validate(p[1], p4_reply)
+ 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
- p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
+ #
+ n_packets_decapped = 0
+ self.p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
# IPv4 tunnel to IPv4
- p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
- p4 = (p_ether / IP(src=self.pg1.remote_ip4,
- dst=self.pg0.local_ip4) / p_ip4 / p_payload)
- p4_reply = (p_ip4 / p_payload)
- p4_reply.ttl -= 1
- rx = self.send_and_expect(self.pg1, p4 * 10, self.pg0)
- for p in rx:
- self.validate(p[1], p4_reply)
+ tcs = [0, dscp, dscp_ecn, ecn]
- err = self.statistics.get_counter(
+ # 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, 10)
+ 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)
- p6 = (p_ether / IP(src=self.pg1.remote_ip4,
- dst=self.pg0.local_ip4) / p_ip6 / p_payload)
- p6_reply = (p_ip6 / p_payload)
- p6_reply.hlim = 63
- rx = self.send_and_expect(self.pg1, p6 * 10, self.pg0)
- for p in rx:
- self.validate(p[1], p6_reply)
+ 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)
- err = self.statistics.get_counter(
+ # 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, 20)
+ self.assertEqual(err, n_packets_decapped)
#
# Fragmentation / Reassembly and Re-fragmentation
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 = []
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_counter(
+ err = self.statistics.get_err_counter(
'/err/ipip4-input/packets decapsulated')
- self.assertEqual(err, 1020)
+ self.assertEqual(err, n_packets_decapped)
f = []
r = []
self.pg_start()
rx = self.pg0.get_capture(6)
reass_pkt = reassemble4(rx)
- p4_reply.ttl -= 1
p4_reply.id = 256
self.validate(reass_pkt, p4_reply)
self.pg_start()
rx = self.pg0.get_capture(2)
reass_pkt = reassemble4(rx)
- p4_reply.ttl -= 1
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 = self.vapi.ipip_add_tunnel(
- src_address=inet_pton(AF_INET, '1.2.3.4'),
- dst_address=inet_pton(AF_INET, '2.3.4.5'), is_ipv6=0)
+ 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)
t = VppIpTable(self, 20)
t.add_vpp_config()
- rv = self.vapi.ipip_add_tunnel(
- src_address=inet_pton(AF_INET, '1.2.3.4'),
- dst_address=inet_pton(AF_INET, '2.3.4.5'), is_ipv6=0,
- table_id=20)
+ 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)
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:
def setup_tunnel(self):
# IPv6 transport
- rv = self.vapi.ipip_add_tunnel(
- src_address=self.pg0.local_ip6n,
- dst_address=self.pg1.remote_ip6n, tc_tos=255)
+ 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, "130.67.0.0", 16,
[VppRoutePath("0.0.0.0",
sw_if_index,
- proto=DpoProto.DPO_PROTO_IP4)], is_ip6=0)
+ 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=DpoProto.DPO_PROTO_IP6)], is_ip6=1)
+ proto=FibPathProto.FIB_PATH_NH_PROTO_IP6)])
ip6_via_tunnel.add_vpp_config()
self.tunnel_ip6_via_tunnel = ip6_via_tunnel
# 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, tc=42) /
+ hlim=64) /
p_ip6 / p_payload)
p6_reply[1].hlim -= 1
rx = self.send_and_expect(self.pg0, p6 * 11, self.pg1)
# 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, tc=42) /
+ 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], 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_ipip_tunnel_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.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_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.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_DSCP |
+ e.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_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.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_ECN |
+ e.IPIP_TUNNEL_API_FLAG_ENCAP_SET_DF |
+ e.IPIP_TUNNEL_API_FLAG_DECAP_COPY_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.IPIP_TUNNEL_API_FLAG_ENCAP_COPY_DF).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 """
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_counter(
+ before_cnt = self.statistics.get_err_counter(
'/err/ipip6-input/packets decapsulated')
frags, p6_reply = self.generate_ip6_frags(3131, 1400)
f = []
for p in rx:
self.validate(p[1], p6_reply)
- cnt = self.statistics.get_counter(
+ cnt = self.statistics.get_err_counter(
'/err/ipip6-input/packets decapsulated')
self.assertEqual(cnt, before_cnt + 1000)
p6 = (p_ether / p_ip6 / p_payload)
p6_reply = (IPv6(src=self.pg0.local_ip6, dst=self.pg1.remote_ip6,
- hlim=63, tc=42) /
+ hlim=63) /
p_ip6 / p_payload)
p6_reply[1].hlim -= 1
self.pg_enable_capture()
rx = self.pg1.get_capture(2)
# Scapy defragment doesn't deal well with multiple layers
- # of samy type / Ethernet header first
+ # of same type / Ethernet header first
f = [p[1] for p in rx]
reass_pkt = defragment6(f)
self.validate(reass_pkt, p6_reply)
def test_ipip_create(self):
""" ipip create / delete interface test """
- rv = self.vapi.ipip_add_tunnel(
- src_address=inet_pton(AF_INET, '1.2.3.4'),
- dst_address=inet_pton(AF_INET, '2.3.4.5'), is_ipv6=0)
+ 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)
t = VppIpTable(self, 20)
t.add_vpp_config()
- rv = self.vapi.ipip_add_tunnel(
- src_address=inet_pton(AF_INET, '1.2.3.4'),
- dst_address=inet_pton(AF_INET, '2.3.4.5'), is_ipv6=0,
- table_id=20)
+ 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)
Code Review / vpp.git / blobdiff