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#!/usr/bin/env python
"""IP{4,6} over IP{v,6} tunnel functional tests"""
import unittest
from scapy.layers.inet6 import IPv6, Ether, IP, UDP
from scapy.all import fragment
from framework import VppTestCase, VppTestRunner
from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto
from socket import AF_INET, AF_INET6, inet_pton
import StringIO
""" Testipip is a subclass of VPPTestCase classes.
IPIP tests.
"""
def reassemble(listoffragments):
buffer = StringIO.StringIO()
first = listoffragments[0]
buffer.seek(20)
for pkt in listoffragments:
buffer.seek(pkt[IP].frag*8)
buffer.write(pkt[IP].payload)
first.len = len(buffer.getvalue()) + 20
first.flags = 0
del(first.chksum)
header = str(first[IP])[:20]
return first[IP].__class__(header + buffer.getvalue())
class TestIPIP(VppTestCase):
""" IPIP Test Case """
@classmethod
def setUpClass(cls):
super(TestIPIP, cls).setUpClass()
cls.create_pg_interfaces(range(2))
cls.interfaces = list(cls.pg_interfaces)
def setUp(cls):
super(TestIPIP, cls).setUp()
for i in cls.interfaces:
i.admin_up()
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.admin_down()
def validate(self, rx, expected):
self.assertEqual(rx, expected.__class__(str(expected)))
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
# Set interface up and enable IP on it
self.vapi.sw_interface_set_flags(sw_if_index, 1)
self.vapi.sw_interface_set_unnumbered(
ip_sw_if_index=self.pg0.sw_if_index,
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()
# 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)
# 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)
# Decapsulation
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)
# IPv4 tunnel to IPv6
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)
# Fragmentation / Reassembly and Re-fragmentation
rv = self.vapi.ip_reassembly_enable_disable(
sw_if_index=self.pg1.sw_if_index,
enable_ip4=1)
# Decapsulation
p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
p_payload = UDP(sport=1234, dport=1234) / self.payload(3123)
p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
outer_ip4 = (p_ether / IP(src=self.pg1.remote_ip4,
dst=self.pg0.local_ip4) / p_ip4 / p_payload)
frags = fragment(outer_ip4, 1400)
p4_reply = (p_ip4 / p_payload)
p4_reply.ttl -= 1
self.pg_enable_capture()
self.pg1.add_stream(frags)
self.pg_start()
rx = self.pg0.get_capture(1)
for p in rx:
self.validate(p[1], p4_reply)
# Now try with re-fragmentation
self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [576, 0, 0, 0])
self.pg_enable_capture()
self.pg1.add_stream(frags)
self.pg_start()
rx = self.pg0.get_capture(6)
reass_pkt = reassemble(rx)
p4_reply.ttl -= 1
p4_reply.id = 256
self.validate(reass_pkt, p4_reply)
def test_ipip6(self):
""" ip{v4,v6} over ip6 test """
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)
# IPv6 transport
rv = self.vapi.ipip_add_tunnel(
src_address=self.pg0.local_ip6n,
dst_address=self.pg1.remote_ip6n, tc_tos=255)
sw_if_index = rv.sw_if_index
self.vapi.sw_interface_set_flags(sw_if_index, 1)
self.vapi.sw_interface_set_unnumbered(
ip_sw_if_index=self.pg0.sw_if_index, 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 IPv6 tunnel
p6 = (p_ether / p_ip6 / p_payload)
p6_reply = (IPv6(src=self.pg0.local_ip6, dst=self.pg1.remote_ip6,
hlim=63, tc=42) /
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=63, tc=42) /
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)
# Decapsulation
p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac)
# IPv6 tunnel to IPv4
p_ip4 = IP(src="1.2.3.4", dst=self.pg0.remote_ip4)
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 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)
sw_if_index = rv.sw_if_index
self.vapi.ipip_del_tunnel(sw_if_index)
def payload(self, len):
return 'x' * len
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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