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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_bgp_prefix_sid.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2020 by LINE Corporation
# Copyright (c) 2020 by Hiroki Shirokura <slank.dev@gmail.com>
#
"""
test_bgp_prefix_sid.py: Test BGP topology with EBGP on prefix-sid
"""
import json
import os
import sys
import functools
import pytest
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
# pylint: disable=C0413
from lib import topotest
from lib.topogen import Topogen, TopoRouter, get_topogen
from lib.topolog import logger
pytestmark = [pytest.mark.bgpd]
def build_topo(tgen):
router = tgen.add_router("r1")
switch = tgen.add_switch("s1")
switch.add_link(router)
switch = tgen.gears["s1"]
peer1 = tgen.add_exabgp_peer("peer1", ip="10.0.0.101", defaultRoute="via 10.0.0.1")
peer2 = tgen.add_exabgp_peer("peer2", ip="10.0.0.102", defaultRoute="via 10.0.0.1")
switch.add_link(peer1)
switch.add_link(peer2)
def setup_module(module):
tgen = Topogen(build_topo, module.__name__)
tgen.start_topology()
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()
logger.info("starting exaBGP on peer1")
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")
logger.info("Running ExaBGP peer")
peer.start(peer_dir, env_file)
logger.info(pname)
def teardown_module(module):
tgen = get_topogen()
tgen.stop_topology()
def test_r1_receive_and_advertise_prefix_sid_type1():
tgen = get_topogen()
router = tgen.gears["r1"]
def _check_type1_r1(router, prefix, remoteLabel, labelIndex):
output = router.vtysh_cmd(
"show bgp ipv4 labeled-unicast {} json".format(prefix)
)
output = json.loads(output)
expected = {
"prefix": prefix,
"advertisedTo": {"10.0.0.101": {}, "10.0.0.102": {}},
"paths": [
{
"valid": True,
"remoteLabel": remoteLabel,
"labelIndex": labelIndex,
}
],
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_check_type1_r1, router, "3.0.0.1/32", 800001, 1)
success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
assert result is None, 'Failed _check_type1_r1 in "{}"'.format(router)
test_func = functools.partial(_check_type1_r1, router, "3.0.0.2/32", 800002, 2)
success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
assert result is None, 'Failed _check_type1_r1 in "{}"'.format(router)
def exabgp_get_update_prefix(filename, afi, nexthop, prefix):
with open(filename) as f:
for line in f.readlines():
output = json.loads(line)
ret = output.get("neighbor")
if ret is None:
continue
ret = ret.get("message")
if ret is None:
continue
ret = ret.get("update")
if ret is None:
continue
ret = ret.get("announce")
if ret is None:
continue
ret = ret.get(afi)
if ret is None:
continue
ret = ret.get(nexthop)
if ret is None:
continue
ret = ret.get(prefix)
if ret is None:
continue
return output
return "Not found"
def test_peer2_receive_prefix_sid_type1():
tgen = get_topogen()
peer2 = tgen.gears["peer2"]
logfile = "{}/{}-received.log".format(peer2.gearlogdir, peer2.name)
def _check_type1_peer2(prefix, labelindex):
output = exabgp_get_update_prefix(
logfile, "ipv4 nlri-mpls", "10.0.0.101", prefix
)
expected = {
"type": "update",
"neighbor": {
"ip": "10.0.0.1",
"message": {
"update": {
"attribute": {
"attribute-0x28-0xE0": "0x010007000000{:08x}".format(
labelindex
)
},
"announce": {"ipv4 nlri-mpls": {"10.0.0.101": {}}},
}
},
},
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_check_type1_peer2, "3.0.0.1/32", labelindex=1)
success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
assert result is None, 'Failed _check_type1_peer2 in "{}"'.format("peer2")
test_func = functools.partial(_check_type1_peer2, "3.0.0.2/32", labelindex=2)
success, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
assert result is None, 'Failed _check_type1_peer2 in "{}"'.format("peer2")
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
ret = pytest.main(args)
sys.exit(ret)
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