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#!/usr/bin/env python
#
# test_pim_basic_topo2.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2021 by
# Network Device Education Foundation, Inc. ("NetDEF")
#
# Permission to use, copy, modify, and/or distribute this software
# for any purpose with or without fee is hereby granted, provided
# that the above copyright notice and this permission notice appear
# in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
# OF THIS SOFTWARE.
#
"""
test_pim_basic_topo2.py: Test the FRR PIM protocol convergence.
"""
import os
import sys
from functools import partial
import pytest
# Save the Current Working Directory to find configuration files.
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
# pylint: disable=C0413
# Import topogen and topotest helpers
from lib import topotest
from lib.topogen import Topogen, TopoRouter, get_topogen
from lib.topolog import logger
# Required to instantiate the topology builder class.
pytestmark = [pytest.mark.bfdd, pytest.mark.pimd]
def build_topo(tgen):
"Build function"
# Create 4 routers
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"])
switch = tgen.add_switch("s3")
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["r4"])
def setup_module(mod):
"Sets up the pytest environment"
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for rname, router in router_list.items():
daemon_file = "{}/{}/bfdd.conf".format(CWD, rname)
if os.path.isfile(daemon_file):
router.load_config(TopoRouter.RD_BFD, daemon_file)
daemon_file = "{}/{}/pimd.conf".format(CWD, rname)
if os.path.isfile(daemon_file):
router.load_config(TopoRouter.RD_PIM, daemon_file)
daemon_file = "{}/{}/zebra.conf".format(CWD, rname)
if os.path.isfile(daemon_file):
router.load_config(TopoRouter.RD_ZEBRA, daemon_file)
# Initialize all routers.
tgen.start_router()
def teardown_module(_mod):
"Teardown the pytest environment"
tgen = get_topogen()
tgen.stop_topology()
def expect_neighbor(router, interface, peer):
"Wait until peer is present on interface."
logger.info("waiting peer {} in {}".format(peer, interface))
tgen = get_topogen()
test_func = partial(
topotest.router_json_cmp,
tgen.gears[router],
"show ip pim neighbor json",
{interface: {peer: {}}},
)
_, result = topotest.run_and_expect(test_func, None, count=130, wait=1)
assertmsg = '"{}" PIM convergence failure'.format(router)
assert result is None, assertmsg
def test_wait_pim_convergence():
"Wait for PIM to converge"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for PIM to converge")
expect_neighbor("r1", "r1-eth0", "192.168.1.2")
expect_neighbor("r2", "r2-eth0", "192.168.1.1")
expect_neighbor("r2", "r2-eth1", "192.168.2.3")
expect_neighbor("r2", "r2-eth2", "192.168.3.4")
expect_neighbor("r3", "r3-eth0", "192.168.2.1")
expect_neighbor("r4", "r4-eth0", "192.168.3.1")
def test_bfd_peers():
"Wait for BFD peers to show up."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for BFD to converge")
def expect_bfd_peer(router, peer):
"Wait until peer is present on interface."
logger.info("waiting BFD peer {} in {}".format(peer, router))
test_func = partial(
topotest.router_json_cmp,
tgen.gears[router],
"show bfd peers json",
[{"peer": peer, "status": "up"}],
)
_, result = topotest.run_and_expect(test_func, None, count=10, wait=1)
assertmsg = '"{}" BFD convergence failure'.format(router)
assert result is None, assertmsg
expect_bfd_peer("r1", "192.168.1.2")
expect_bfd_peer("r2", "192.168.1.1")
expect_bfd_peer("r2", "192.168.2.3")
expect_bfd_peer("r2", "192.168.3.4")
expect_bfd_peer("r3", "192.168.2.1")
expect_bfd_peer("r4", "192.168.3.1")
def test_pim_reconvergence():
"Disconnect a peer and expect it to disconnect."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for disconnect convergence")
tgen.gears["r4"].link_enable("r4-eth0", enabled=False)
def expect_neighbor_down(router, interface, peer):
"Wait until peer is present on interface."
logger.info("waiting peer {} in {} to disappear".format(peer, interface))
test_func = partial(
topotest.router_json_cmp,
tgen.gears[router],
"show ip pim neighbor json",
{interface: {peer: None}},
)
_, result = topotest.run_and_expect(test_func, None, count=5, wait=1)
assertmsg = '"{}" PIM convergence failure'.format(router)
assert result is None, assertmsg
expect_neighbor_down("r2", "r2-eth2", "192.168.3.4")
logger.info("waiting for reconvergence")
tgen.gears["r4"].link_enable("r4-eth0", enabled=True)
expect_neighbor("r2", "r2-eth2", "192.168.3.4")
def test_pim_bfd_profile():
"Test that the BFD profile is properly applied in BFD."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
def expect_bfd_peer_settings(router, settings):
"Expect the following BFD configuration"
logger.info("Verifying BFD peer {} in {}".format(settings["peer"], router))
test_func = partial(
topotest.router_json_cmp,
tgen.gears[router],
"show bfd peers json",
[settings],
)
_, result = topotest.run_and_expect(test_func, None, count=5, wait=1)
assertmsg = '"{}" BFD convergence failure'.format(router)
assert result is None, assertmsg
expect_bfd_peer_settings(
"r1",
{
"peer": "192.168.1.2",
"receive-interval": 250,
"transmit-interval": 250,
},
)
expect_bfd_peer_settings(
"r2",
{
"peer": "192.168.1.1",
"remote-receive-interval": 250,
"remote-transmit-interval": 250,
},
)
def test_memory_leak():
"Run the memory leak test and report results."
tgen = get_topogen()
if not tgen.is_memleak_enabled():
pytest.skip("Memory leak test/report is disabled")
tgen.report_memory_leaks()
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
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