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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
# Copyright (c) 2024 by
# Donatas Abraitis <donatas@opensourcerouting.org>
#
"""
Test if extended nexthop capability is exchanged dynamically.
"""
import os
import sys
import json
import pytest
import functools
import time
pytestmark = [pytest.mark.bgpd]
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
from lib.common_config import step
def setup_module(mod):
topodef = {"s1": ("r1", "r2")}
tgen = Topogen(topodef, 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_dynamic_capability_enhe():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
r1 = tgen.gears["r1"]
r2 = tgen.gears["r2"]
def _bgp_converge():
output = json.loads(r1.vtysh_cmd("show bgp neighbor 2001:db8::2 json"))
expected = {
"2001:db8::2": {
"bgpState": "Established",
"localRole": "undefined",
"remoteRole": "undefined",
"neighborCapabilities": {
"dynamic": "advertisedAndReceived",
"extendedNexthop": "received",
},
}
}
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, "Can't converge"
def _bgp_check_nexthop():
output = json.loads(r1.vtysh_cmd("show ip route 10.10.10.10/32 json"))
expected = {
"10.10.10.10/32": [
{
"protocol": "bgp",
"selected": True,
"installed": True,
"nexthops": [
{
"fib": True,
"ip": "192.168.1.2",
"afi": "ipv4",
"interfaceName": "r1-eth0",
"active": True,
},
{
"duplicate": True,
"ip": "192.168.1.2",
"afi": "ipv4",
"interfaceName": "r1-eth0",
"active": True,
},
],
}
]
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(
_bgp_check_nexthop,
)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
assert result is None, "Can't see 10.10.10.10/32 with IPv4 only nexthops"
step("Enable ENHE capability")
# Clear message stats to check if we receive a notification or not after we
# change the role.
r2.vtysh_cmd("clear bgp 2001:db8::1 message-stats")
r1.vtysh_cmd(
"""
configure terminal
router bgp
neighbor 2001:db8::2 capability extended-nexthop
"""
)
def _bgp_check_if_session_not_reset():
output = json.loads(r2.vtysh_cmd("show bgp neighbor 2001:db8::1 json"))
expected = {
"2001:db8::1": {
"bgpState": "Established",
"neighborCapabilities": {
"dynamic": "advertisedAndReceived",
"extendedNexthop": "advertisedAndReceived",
"extendedNexthopFamililesByPeer": {
"ipv4Unicast": "recieved",
},
},
"messageStats": {
"notificationsRecv": 0,
"capabilityRecv": 1,
},
}
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(
_bgp_check_if_session_not_reset,
)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
assert result is None, "Session was reset after setting ENHE capability"
def _bgp_check_nexthop_enhe():
output = json.loads(r1.vtysh_cmd("show ip route 10.10.10.10/32 json"))
expected = {
"10.10.10.10/32": [
{
"protocol": "bgp",
"selected": True,
"installed": True,
"nexthops": [
{
"fib": True,
"ip": "192.168.1.2",
"afi": "ipv4",
"interfaceName": "r1-eth0",
"active": True,
},
{
"fib": True,
"afi": "ipv6",
"interfaceName": "r1-eth0",
"active": True,
},
],
}
]
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(
_bgp_check_nexthop_enhe,
)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
assert result is None, "Can't see 10.10.10.10/32 with IPv4 only nexthops"
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
|
