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#!/usr/bin/env python3
# SPDX-License-Identifier: ISC
# Copyright (c) 2024 Network Education Foundation, Inc. ("NetDEF")
# Rafael Zalamena
import os
import sys
import pytest
from functools import partial
from lib import topotest
# pylint: disable=C0413
# Import topogen and topotest helpers
from lib.topogen import Topogen, get_topogen
from lib.topolog import logger
from lib.pim import McastTesterHelper
"""
pim_embedded_rp.py: Test PIM embedded RP functionality.
"""
# Save the Current Working Directory to find configuration files.
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
# Required to instantiate the topology builder class.
pytestmark = [pytest.mark.pim6d]
def build_topo(tgen):
tgen.add_router("r1")
tgen.add_router("r2")
tgen.add_router("r3")
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["r1"])
switch.add_link(tgen.gears["r3"])
switch = tgen.add_switch("s3")
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["r3"])
tgen.add_host("h1", "2001:DB8:100::100", "via 2001:DB8:100::1")
tgen.add_host("h2", "2001:DB8:200::100", "via 2001:DB8:200::1")
switch = tgen.add_switch("s10")
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["h1"])
switch = tgen.add_switch("s20")
switch.add_link(tgen.gears["r3"])
switch.add_link(tgen.gears["h2"])
app_helper = McastTesterHelper()
def setup_module(mod):
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for _, router in router_list.items():
router.load_frr_config(os.path.join(CWD, f"{router.name}/frr.conf"))
tgen.start_router()
app_helper.init(tgen)
def teardown_module(mod):
tgen = get_topogen()
tgen.stop_topology()
def test_ospfv3_convergence():
"Wait for OSPFv3 protocol convergence"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for protocols to converge")
def expect_loopback_route(router, iptype, route, proto):
"Wait until route is present on RIB for protocol."
logger.info(f"waiting route {route} in {router}")
test_func = partial(
topotest.router_json_cmp,
tgen.gears[router],
f"show {iptype} route json",
{route: [{"protocol": proto}]},
)
_, result = topotest.run_and_expect(test_func, None, count=10, wait=8)
assert result is None, f'"{router}" convergence failure'
# Wait for R1
expect_loopback_route("r1", "ipv6", "2001:db8:ffff::2/128", "ospf6")
expect_loopback_route("r1", "ipv6", "2001:db8:ffff::3/128", "ospf6")
# Wait for R2
expect_loopback_route("r2", "ipv6", "2001:db8:ffff::1/128", "ospf6")
expect_loopback_route("r2", "ipv6", "2001:db8:ffff::3/128", "ospf6")
# Wait for R3
expect_loopback_route("r3", "ipv6", "2001:db8:ffff::1/128", "ospf6")
expect_loopback_route("r3", "ipv6", "2001:db8:ffff::2/128", "ospf6")
def expect_pim_rp(router, rp, group, interface=None, missing=False):
"Wait until RP is present."
tgen = get_topogen()
maximum_wait = 15
log_message = f"waiting RP {rp} for {group} in {router}"
if missing:
log_message += \
f" to be missing ({maximum_wait} seconds maximum)"
logger.info(log_message)
expected = {rp: [{"group": f"{group}/128"}]}
if interface is not None:
expected[rp][0]["outboundInterface"] = interface
test_func = partial(
topotest.router_json_cmp,
tgen.gears[router],
f"show ipv6 pim rp-info json",
expected
)
_, result = topotest.run_and_expect(
test_func, None, count=maximum_wait, wait=1)
if missing:
assert result is not None, f'"{router}" convergence failure'
else:
assert result is None, f'"{router}" convergence failure'
def test_embedded_rp_mld_join():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
success_group = "ff75:130:2001:db8:ffff::100"
filtered_group = "ff75:330:2001:db8:ffff::200"
app_helper.run("h1", [success_group, "h1-eth0"])
app_helper.run("h1", [filtered_group, "h1-eth0"])
# Expect first valid join request
expect_pim_rp("r2", "2001:db8:ffff::1", success_group, interface="r2-eth0")
# Expect filtered join request
expect_pim_rp("r2", "2001:db8:ffff::2", filtered_group, missing=True)
# Send over the limit join request
groups = [
"ff75:130:2001:db8:ffff::300",
"ff75:130:2001:db8:ffff::301",
"ff75:130:2001:db8:ffff::302",
]
for group in groups:
app_helper.run("h1", [group, "h1-eth0"])
topotest.sleep(2, "Waiting MLD join to be sent")
expect_pim_rp("r2", "2001:db8:ffff::1", groups[0], interface="r2-eth0")
expect_pim_rp("r2", "2001:db8:ffff::1", groups[1], interface="r2-eth0")
# Over the limit entry
expect_pim_rp("r2", "2001:db8:ffff::1", groups[2], missing=True)
app_helper.stop_all_hosts()
# Clean up the embedded RPs so we don't cross the limit next phase
tgen.gears["r2"].vtysh_cmd("clear ipv6 mroute")
def test_embedded_rp_pim_join():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
#
# Test sending PIM join with embedded RP information to router R2
#
group = "ff75:230:2001:db8:ffff::400"
app_helper.run("h2", [group, "h2-eth0"])
expect_pim_rp("r3", "2001:db8:ffff::2", group, interface="r3-eth1")
expect_pim_rp("r2", "2001:db8:ffff::2", group, interface="lo")
app_helper.stop_all_hosts()
def test_embedded_rp_spt_switch():
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
# Clean up the embedded RPs so we don't cross the limit next phase
tgen.gears["r1"].vtysh_cmd("clear ipv6 mroute")
tgen.gears["r2"].vtysh_cmd("clear ipv6 mroute")
tgen.gears["r3"].vtysh_cmd("clear ipv6 mroute")
group = "ff75:130:2001:db8:ffff::500"
rp = "2001:db8:ffff::1"
source = "2001:db8:100::100"
# Join from r3 (host h2)
app_helper.run("h2", [group, "h2-eth0"])
# Wait for embedded RP to show up
expect_pim_rp("r3", rp, group, interface="r3-eth0")
# Send stream from r2 (host h1)
app_helper.run("h1", ["--send=0.7", group, "h1-eth0"])
# Check if R1 has the correct multicast route
logger.info("Waiting r1 multicast route installation")
test_func = partial(
topotest.router_json_cmp,
tgen.gears["r1"],
f"show ipv6 pim state json",
{group: {"*": {}, source: {}}}
)
_, result = topotest.run_and_expect(test_func, None, count=10, wait=8)
assert result is None, '"r1" convergence failure'
# Check if R2 has the correct multicast route
logger.info("Waiting r2 multicast route installation")
test_func = partial(
topotest.router_json_cmp,
tgen.gears["r2"],
f"show ipv6 pim state json",
{group: {source: {"r2-eth2": {"r2-eth1": {}}}}}
)
_, result = topotest.run_and_expect(test_func, None, count=10, wait=8)
assert result is None, '"r2" convergence failure'
# Check if R3 has the correct multicast route
logger.info("Waiting r3 multicast route installation")
test_func = partial(
topotest.router_json_cmp,
tgen.gears["r3"],
f"show ipv6 pim state json",
{group: {source: {"r3-eth1": {"r3-eth2": {}}}}}
)
_, result = topotest.run_and_expect(test_func, None, count=10, wait=8)
assert result is None, '"r3" convergence failure'
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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