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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
# Copyright (c) 2023 by
# Donatas Abraitis <donatas@opensourcerouting.org>
#
"""
Test if software version capability is exchanged dynamically.
"""
import os
import re
import sys
import json
import pytest
import functools
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, TopoRouter, get_topogen
from lib.common_config import step
pytestmark = [pytest.mark.bgpd]
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_software_version():
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 json"))
expected = {
"192.168.1.2": {
"bgpState": "Established",
"neighborCapabilities": {
"dynamic": "advertisedAndReceived",
"softwareVersion": {
"advertisedSoftwareVersion": None,
"receivedSoftwareVersion": None,
},
},
"addressFamilyInfo": {
"ipv4Unicast": {
"acceptedPrefixCounter": 3,
}
},
}
}
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"
step("Enable software version capability and check if it's exchanged dynamically")
# Clear message stats to check if we receive a notification or not after we
# enable software-version capability.
r1.vtysh_cmd("clear bgp 192.168.1.2 message-stats")
r1.vtysh_cmd(
"""
configure terminal
router bgp
neighbor 192.168.1.2 capability software-version
"""
)
r2.vtysh_cmd(
"""
configure terminal
router bgp
neighbor 192.168.1.1 capability software-version
"""
)
def _bgp_check_if_session_not_reset():
def _bgp_software_version():
try:
versions = output["192.168.1.2"]["neighborCapabilities"][
"softwareVersion"
]
adv = versions["advertisedSoftwareVersion"]
rcv = versions["receivedSoftwareVersion"]
if not adv and not rcv:
return ""
pattern = "^FRRouting/\\d.+"
if re.search(pattern, adv) and re.search(pattern, rcv):
return adv, rcv
except:
return ""
output = json.loads(r1.vtysh_cmd("show bgp neighbor json"))
adv, rcv = _bgp_software_version()
expected = {
"192.168.1.2": {
"bgpState": "Established",
"neighborCapabilities": {
"dynamic": "advertisedAndReceived",
"softwareVersion": {
"advertisedSoftwareVersion": adv,
"receivedSoftwareVersion": rcv,
},
},
"addressFamilyInfo": {
"ipv4Unicast": {
"acceptedPrefixCounter": 3,
}
},
"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 enabling software version capability"
# Clear message stats to check if we receive a notification or not after we
# disable software-version capability.
r1.vtysh_cmd("clear bgp 192.168.1.2 message-stats")
r1.vtysh_cmd(
"""
configure terminal
router bgp
no neighbor 192.168.1.2 capability software-version
"""
)
def _bgp_check_if_software_version_capability_is_absent():
output = json.loads(r1.vtysh_cmd("show bgp neighbor json"))
expected = {
"192.168.1.2": {
"bgpState": "Established",
"neighborCapabilities": {
"dynamic": "advertisedAndReceived",
"softwareVersion": {
"advertisedSoftwareVersion": None,
},
},
"messageStats": {
"notificationsRecv": 0,
},
}
}
return topotest.json_cmp(output, expected)
test_func = functools.partial(
_bgp_check_if_software_version_capability_is_absent,
)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
assert result is None, "Failed to disable software version capability"
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
|
