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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_bgp_flowspec_topo.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2019 by 6WIND
#
"""
test_bgp_flowspec_topo.py: Test BGP topology with Flowspec EBGP peering
+------+------+
| peer1 |
| BGP peer 1 |
|192.168.0.161|
| |
+------+------+
.2 | r1-eth0
|
~~~~~~~~~
+---~~ s1 ~~------+
~~ ~~
~~~~~~~~~
| 10.0.1.1 r1-eth0
| 1001::1 r1-eth0
+--------+--------+
| r1 |
|BGP 192.168.0.162|
| |
| |
| |
+-----------------+
"""
import json
import functools
import os
import sys
import pytest
# Save the Current Working Directory to find configuration files.
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
# pylint: disable=C0413
# Import topogen and topotest helpers
from lib import topotest
from lib.topogen import Topogen, TopoRouter, get_topogen
from lib.topolog import logger
# Required to instantiate the topology builder class.
pytestmark = [pytest.mark.bgpd]
#####################################################
##
## Network Topology Definition
##
#####################################################
def build_topo(tgen):
tgen.add_router("r1")
# Setup Control Path Switch 1. r1-eth0
switch = tgen.add_switch("s1")
switch.add_link(tgen.gears["r1"])
## Add eBGP ExaBGP neighbors
peer_ip = "10.0.1.101" ## peer
peer_route = "via 10.0.1.1" ## router
peer = tgen.add_exabgp_peer("peer1", ip=peer_ip, defaultRoute=peer_route)
switch.add_link(peer)
#####################################################
##
## Tests starting
##
#####################################################
def setup_module(module):
tgen = Topogen(build_topo, module.__name__)
tgen.start_topology()
# check for zebra capability
router = tgen.gears["r1"]
# Get r1 reference and run Daemons
logger.info("Launching BGP and ZEBRA on r1")
router = tgen.gears["r1"]
router.load_config(
TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format("r1"))
)
router.load_config(
TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format("r1"))
)
router.start()
peer_list = tgen.exabgp_peers()
for pname, peer in peer_list.items():
peer_dir = os.path.join(CWD, pname)
env_file = os.path.join(CWD, "exabgp.env")
peer.start(peer_dir, env_file)
logger.info(pname)
def teardown_module(module):
tgen = get_topogen()
tgen.stop_topology()
def test_bgp_convergence():
"Test for BGP topology convergence"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for bgp convergence")
# Expected result
router = tgen.gears["r1"]
reffile = os.path.join(CWD, "r1/summary.txt")
expected = json.loads(open(reffile).read())
test_func = functools.partial(
topotest.router_json_cmp, router, "show bgp summary json", expected
)
_, res = topotest.run_and_expect(test_func, None, count=210, wait=1)
assertmsg = "BGP router network did not converge"
assert res is None, assertmsg
def test_bgp_flowspec():
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
router = tgen.gears["r1"]
logger.info("Check BGP FS entry for 3.3.3.3 with redirect IP")
output = router.vtysh_cmd(
"show bgp ipv4 flowspec 3.3.3.3", isjson=False, daemon="bgpd"
)
logger.info(output)
if (
"NH 50.0.0.2" not in output
or "FS:redirect IP" not in output
or "Packet Length < 200" not in output
):
assertmsg = "traffic to 3.3.3.3 should have been detected as FS entry. NOK"
assert 0, assertmsg
else:
logger.info("Check BGP FS entry for 3.3.3.3 with redirect IP OK")
logger.info("Check BGP FS entry for 3::3 with redirect IP")
output = router.vtysh_cmd(
"show bgp ipv6 flowspec 3::3", isjson=False, daemon="bgpd"
)
logger.info(output)
if (
"NH 50::2" not in output
or "FS:redirect IP" not in output
or "Packet Length < 200" not in output
):
assertmsg = "traffic to 3::3 should have been detected as FS entry. NOK"
assert 0, assertmsg
else:
logger.info("Check BGP FS entry for 3::3 with redirect IP OK")
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
ret = pytest.main(args)
sys.exit(ret)
|
