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#!/usr/bin/env python
import abc
import six
import unittest
from scapy.fields import BitField, ByteField, FlagsField, IntField
from scapy.packet import bind_layers, Packet, Raw
from scapy.layers.inet import IP, UDP, Ether
from scapy.layers.inet6 import IPv6
from framework import VppTestCase, VppTestRunner
from lisp import VppLocalMapping, VppLispAdjacency, VppLispLocator, \
VppLispLocatorSet, VppRemoteMapping
from util import ppp, ForeignAddressFactory
# From py_lispnetworking.lisp.py: # GNU General Public License v2.0
class LISP_GPE_Header(Packet):
name = "LISP GPE Header"
fields_desc = [
FlagsField("gpe_flags", None, 6, ["N", "L", "E", "V", "I", "P"]),
BitField("reserved", 0, 18),
ByteField("next_proto", 0),
IntField("iid", 0),
]
bind_layers(UDP, LISP_GPE_Header, dport=4341)
bind_layers(UDP, LISP_GPE_Header, sport=4341)
bind_layers(LISP_GPE_Header, IP, next_proto=1)
bind_layers(LISP_GPE_Header, IPv6, next_proto=2)
bind_layers(LISP_GPE_Header, Ether, next_proto=3)
@six.add_metaclass(abc.ABCMeta)
class Driver(object):
config_order = ['locator-sets',
'locators',
'local-mappings',
'remote-mappings',
'adjacencies']
""" Basic class for data driven testing """
def __init__(self, test, test_cases):
self._test_cases = test_cases
self._test = test
@property
def test_cases(self):
return self._test_cases
@property
def test(self):
return self._test
def create_packet(self, src_if, dst_if, deid, payload=''):
"""
Create IPv4 packet
param: src_if
param: dst_if
"""
packet = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
IP(src=src_if.remote_ip4, dst=deid) /
Raw(payload))
return packet
@abc.abstractmethod
def run(self):
""" testing procedure """
pass
class SimpleDriver(Driver):
""" Implements simple test procedure """
def __init__(self, test, test_cases):
super(SimpleDriver, self).__init__(test, test_cases)
def verify_capture(self, src_loc, dst_loc, capture):
"""
Verify captured packet
:param src_loc: source locator address
:param dst_loc: destination locator address
:param capture: list of captured packets
"""
self.test.assertEqual(len(capture), 1, "Unexpected number of "
"packets! Expected 1 but {} received"
.format(len(capture)))
packet = capture[0]
try:
ip_hdr = packet[IP]
# assert the values match
self.test.assertEqual(ip_hdr.src, src_loc, "IP source address")
self.test.assertEqual(ip_hdr.dst, dst_loc,
"IP destination address")
gpe_hdr = packet[LISP_GPE_Header]
self.test.assertEqual(gpe_hdr.next_proto, 1,
"next_proto is not ipv4!")
ih = gpe_hdr[IP]
self.test.assertEqual(ih.src, self.test.pg0.remote_ip4,
"unexpected source EID!")
self.test.assertEqual(ih.dst, self.test.deid_ip4,
"unexpected dest EID!")
except:
self.test.logger.error(ppp("Unexpected or invalid packet:",
packet))
raise
def configure_tc(self, tc):
for config_item in self.config_order:
for vpp_object in tc[config_item]:
vpp_object.add_vpp_config()
def run(self, dest):
""" Send traffic for each test case and verify that it
is encapsulated """
for tc in enumerate(self.test_cases):
self.test.logger.info('Running {}'.format(tc[1]['name']))
self.configure_tc(tc[1])
packet = self.create_packet(self.test.pg0, self.test.pg1, dest,
'data')
self.test.pg0.add_stream(packet)
self.test.pg0.enable_capture()
self.test.pg1.enable_capture()
self.test.pg_start()
capture = self.test.pg1.get_capture(1)
self.verify_capture(self.test.pg1.local_ip4,
self.test.pg1.remote_ip4, capture)
self.test.pg0.assert_nothing_captured()
class TestLisp(VppTestCase):
""" Basic LISP test """
@classmethod
def setUpClass(cls):
super(TestLisp, cls).setUpClass()
cls.faf = ForeignAddressFactory()
cls.create_pg_interfaces(range(2)) # create pg0 and pg1
for i in cls.pg_interfaces:
i.admin_up() # put the interface upsrc_if
i.config_ip4() # configure IPv4 address on the interface
i.resolve_arp() # resolve ARP, so that we know VPP MAC
@classmethod
def tearDownClass(cls):
super(TestLisp, cls).tearDownClass()
def setUp(self):
super(TestLisp, self).setUp()
self.vapi.lisp_enable_disable(is_enabled=1)
def test_lisp_basic_encap(self):
"""Test case for basic encapsulation"""
self.deid_ip4_net = self.faf.net
self.deid_ip4 = self.faf.get_ip4()
self.seid_ip4 = '{!s}/{!s}'.format(self.pg0.local_ip4, 32)
self.rloc_ip4 = self.pg1.remote_ip4n
test_cases = [
{
'name': 'basic ip4 over ip4',
'locator-sets': [VppLispLocatorSet(self, b'ls-4o4')],
'locators': [
VppLispLocator(self, self.pg1.sw_if_index, b'ls-4o4')
],
'local-mappings': [
VppLocalMapping(self, self.seid_ip4, b'ls-4o4')
],
'remote-mappings': [
VppRemoteMapping(self, self.deid_ip4_net,
[{
"is_ip4": 1,
"priority": 1,
"weight": 1,
"addr": self.rloc_ip4
}])
],
'adjacencies': [
VppLispAdjacency(self, self.seid_ip4, self.deid_ip4_net)
]
}
]
self.test_driver = SimpleDriver(self, test_cases)
self.test_driver.run(self.deid_ip4)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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