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#!/usr/bin/env python
from socket import inet_pton, inet_ntop, AF_INET, AF_INET6
import unittest
from framework import VppTestCase, VppTestRunner
from vpp_ip import DpoProto
from vpp_ip_route import VppIpRoute, VppRoutePath, VppMplsLabel, VppIpTable
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from scapy.layers.inet6 import IPv6
from vpp_object import VppObject
NUM_PKTS = 67
def find_l3xc(test, sw_if_index, dump_sw_if_index=None):
if not dump_sw_if_index:
dump_sw_if_index = sw_if_index
xcs = test.vapi.l3xc_dump(dump_sw_if_index)
for xc in xcs:
if sw_if_index == xc.l3xc.sw_if_index:
return True
return False
class VppL3xc(VppObject):
def __init__(self, test, intf, paths, is_ip6=False):
self._test = test
self.intf = intf
self.is_ip6 = is_ip6
self.paths = paths
self.encoded_paths = []
for path in self.paths:
self.encoded_paths.append(path.encode())
def add_vpp_config(self):
self._test.vapi.l3xc_update(
l3xc={
'is_ip6': self.is_ip6,
'sw_if_index': self.intf.sw_if_index,
'n_paths': len(self.paths),
'paths': self.encoded_paths
})
self._test.registry.register(self, self._test.logger)
def remove_vpp_config(self):
self._test.vapi.l3xc_del(
is_ip6=self.is_ip6,
sw_if_index=self.intf.sw_if_index)
def query_vpp_config(self):
return find_l3xc(self._test, self.intf.sw_if_index)
def object_id(self):
return ("l3xc-%d" % self.intf.sw_if_index)
class TestL3xc(VppTestCase):
""" L3XC Test Case """
@classmethod
def setUpClass(cls):
super(TestL3xc, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestL3xc, cls).tearDownClass()
def setUp(self):
super(TestL3xc, self).setUp()
self.create_pg_interfaces(range(6))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip4()
i.resolve_arp()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
for i in self.pg_interfaces:
i.unconfig_ip4()
i.unconfig_ip6()
i.ip6_disable()
i.admin_down()
super(TestL3xc, self).tearDown()
def send_and_expect_load_balancing(self, input, pkts, outputs):
self.pg_send(input, pkts)
rxs = []
for oo in outputs:
rx = oo._get_capture(1)
self.assertNotEqual(0, len(rx))
for r in rx:
rxs.append(r)
return rxs
def test_l3xc4(self):
""" IPv4 X-Connect """
#
# x-connect pg0 to pg1 and pg2 to pg3->5
#
l3xc_1 = VppL3xc(self, self.pg0,
[VppRoutePath(self.pg1.remote_ip4,
self.pg1.sw_if_index)])
l3xc_1.add_vpp_config()
l3xc_2 = VppL3xc(self, self.pg2,
[VppRoutePath(self.pg3.remote_ip4,
self.pg3.sw_if_index),
VppRoutePath(self.pg4.remote_ip4,
self.pg4.sw_if_index),
VppRoutePath(self.pg5.remote_ip4,
self.pg5.sw_if_index)])
l3xc_2.add_vpp_config()
self.assertTrue(find_l3xc(self, self.pg2.sw_if_index, 0xffffffff))
self.logger.info(self.vapi.cli("sh l3xc"))
#
# fire in packets. If it's forwarded then the L3XC was successful,
# since default routing will drop it
#
p_1 = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IP(src="1.1.1.1", dst="1.1.1.2") /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
# self.send_and_expect(self.pg0, p_1*NUM_PKTS, self.pg1)
p_2 = []
for ii in range(NUM_PKTS):
p_2.append(Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IP(src="1.1.1.1", dst="1.1.1.2") /
UDP(sport=1000 + ii, dport=1234) /
Raw('\xa5' * 100))
self.send_and_expect_load_balancing(self.pg2, p_2,
[self.pg3, self.pg4, self.pg5])
l3xc_2.remove_vpp_config()
self.send_and_assert_no_replies(self.pg2, p_2)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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