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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_bgp_set_aspath_exclude.py
#
# Copyright 2023 by 6WIND S.A.
#
"""
Test if `set as-path exclude` is working correctly for route-maps.
"""
import os
import sys
import json
import pytest
import functools
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
pytestmark = [pytest.mark.bgpd]
def build_topo(tgen):
for routern in range(1, 5):
tgen.add_router("r{}".format(routern))
switch = tgen.add_switch("s1")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["r2"])
switch = tgen.add_switch("s2")
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["r3"])
def setup_module(mod):
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for i, (rname, router) in enumerate(router_list.items(), 1):
router.load_config(
TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
)
router.load_config(
TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
)
tgen.start_router()
def teardown_module(mod):
tgen = get_topogen()
tgen.stop_topology()
def test_bgp_set_aspath_exclude():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
def _bgp_converge(router):
output = json.loads(router.vtysh_cmd("show bgp ipv4 unicast json"))
expected = {
"routes": {
"172.16.255.31/32": [{"path": "65002"}],
"172.16.255.32/32": [{"path": ""}],
}
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_converge, tgen.gears["r1"])
_, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
assert result is None, "Failed overriding incoming AS-PATH with route-map"
def test_bgp_set_aspath_exclude_access_list():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
rname = "r1"
r1 = tgen.gears[rname]
r1.vtysh_cmd(
"""
conf
bgp as-path access-list FIRST permit ^65
route-map r2 permit 6
set as-path exclude as-path-access-list FIRST
"""
)
expected = {
"routes": {
"172.16.255.31/32": [{"path": ""}],
"172.16.255.32/32": [{"path": ""}],
}
}
def _bgp_regexp_1(router):
output = json.loads(router.vtysh_cmd("show bgp ipv4 unicast json"))
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_regexp_1, tgen.gears["r1"])
_, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
assert result is None, "Failed overriding incoming AS-PATH with regex 1 route-map"
r1.vtysh_cmd(
"""
conf
bgp as-path access-list SECOND permit 2
route-map r2 permit 6
set as-path exclude as-path-access-list SECOND
"""
)
expected = {
"routes": {
"172.16.255.31/32": [{"path": "65003"}],
"172.16.255.32/32": [{"path": "65003"}],
}
}
test_func = functools.partial(_bgp_regexp_1, tgen.gears["r1"])
_, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
assert result is None, "Failed overriding incoming AS-PATH with regex 2 route-map"
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
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