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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
# Copyright (c) 2023 by
# Donatas Abraitis <donatas@opensourcerouting.org>
#
"""
Test if Node Target Extended Communities works.
At r1 we set NT to 192.168.1.3 and 192.168.1.4 (this is the R3/R4 router-id),
and that means 10.10.10.10/32 MUST be installed on R3 and R4, but not on R2,
because this route does not have NT:192.168.1.2.
"""
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, 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.add_link(tgen.gears["r3"])
switch.add_link(tgen.gears["r4"])
def setup_module(mod):
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for _, (rname, router) in enumerate(router_list.items(), 1):
router.load_frr_config(os.path.join(CWD, "{}/frr.conf".format(rname)))
tgen.start_router()
def teardown_module(mod):
tgen = get_topogen()
tgen.stop_topology()
def test_bgp_node_target_extended_communities():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
r1 = tgen.gears["r1"]
r2 = tgen.gears["r2"]
r3 = tgen.gears["r3"]
r4 = tgen.gears["r4"]
def _bgp_converge():
output = json.loads(r1.vtysh_cmd("show bgp summary json"))
expected = {
"ipv4Unicast": {
"peers": {
"192.168.1.2": {
"pfxSnt": 1,
"state": "Established",
},
"192.168.1.3": {
"pfxSnt": 1,
"state": "Established",
},
"192.168.1.4": {
"pfxSnt": 1,
"state": "Established",
},
}
}
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_converge)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
assert result is None, "Failed announcing 10.10.10.10/32 to r2, r3, and r4"
def _bgp_check_route(router, exists):
output = json.loads(router.vtysh_cmd("show bgp ipv4 unicast json"))
if exists:
expected = {
"routes": {
"10.10.10.10/32": [
{
"valid": True,
}
]
}
}
else:
expected = {
"routes": {
"10.10.10.10/32": None,
}
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(_bgp_check_route, r3, True)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
assert result is None, "10.10.10.10/32 is not installed, but SHOULD be"
test_func = functools.partial(_bgp_check_route, r4, True)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
assert result is None, "10.10.10.10/32 is not installed, but SHOULD be"
test_func = functools.partial(_bgp_check_route, r2, False)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
assert result is None, "10.10.10.10/32 is installed, but SHOULD NOT be"
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
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