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#!/usr/bin/env python3
import abc
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 asf.lisp import (
VppLocalMapping,
VppLispAdjacency,
VppLispLocator,
VppLispLocatorSet,
VppRemoteMapping,
LispRemoteLocator,
)
from util import ppp
# 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)
class ForeignAddressFactory(object):
count = 0
prefix_len = 24
net_template = "10.10.10.{}"
net = net_template.format(0) + "/" + str(prefix_len)
def get_ip4(self):
if self.count > 255:
raise Exception("Network host address exhaustion")
self.count += 1
return self.net_template.format(self.count)
class Driver(metaclass=abc.ABCMeta):
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_enable=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_ip4
test_cases = [
{
"name": "basic ip4 over ip4",
"locator-sets": [VppLispLocatorSet(self, "ls-4o4")],
"locators": [VppLispLocator(self, self.pg1.sw_if_index, "ls-4o4")],
"local-mappings": [VppLocalMapping(self, self.seid_ip4, "ls-4o4")],
"remote-mappings": [
VppRemoteMapping(
self, self.deid_ip4_net, [LispRemoteLocator(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)
class TestLispUT(VppTestCase):
"""Lisp UT"""
@classmethod
def setUpClass(cls):
super(TestLispUT, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestLispUT, cls).tearDownClass()
def test_fib(self):
"""LISP Unit Tests"""
error = self.vapi.cli("test lisp cp")
if error:
self.logger.critical(error)
self.assertNotIn("Failed", error)
if __name__ == "__main__":
unittest.main(testRunner=VppTestRunner)
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