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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_pim_acl.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2020 by
# Network Device Education Foundation, Inc. ("NetDEF")
#
"""
test_pim_acl.py: Test PIM with RP selection using ACLs
"""
# Test PIM RP selection with ACLs
#
# Testing RP selection with ACLs. R1 uses multiple ACLs
# to select desired RPs (R11 to R15)
#
# Test steps:
# - setup_module()
# Create topology. Hosts are only using zebra/staticd,
# no PIM, no OSPF (using IGMPv2 for multicast)
# - test_ospf_convergence()
# Wait for OSPF convergence in each VRF. OSPF is run on
# R1 and R11 - R15.
# - test_pim_convergence()
# Wait for PIM convergence on all routers. PIM is run on
# R1 and R11 - R15.
# - test_mcast_acl_1():
# Test 1st ACL entry 239.100.0.0/28 with 239.100.0.1 which
# should use R11 as RP
# Stop multicast after verification
# - test_mcast_acl_2():
# Test 2nd ACL entry 239.100.0.17/32 with 239.100.0.17 which
# should use R12 as RP
# Stop multicast after verification
# - test_mcast_acl_3():
# Test 3rd ACL entry 239.100.0.32/27 with 239.100.0.32 which
# should use R13 as RP
# Stop multicast after verification
# - test_mcast_acl_4():
# Test 4th ACL entry 239.100.0.128/25 with 239.100.0.255 which
# should use R14 as RP
# Stop multicast after verification
# - test_mcast_acl_5():
# Test 5th ACL entry 239.100.0.96/28 with 239.100.0.97 which
# should use R14 as RP
# Stop multicast after verification
# - test_mcast_acl_6():
# Test 6th ACL entry 239.100.0.64/28 with 239.100.0.70 which
# should use R15 as RP
# Stop multicast after verification
# - teardown_module()
# shutdown topology
#
# XXX clean up in later commit to avoid conflict on rebase
# pylint: disable=C0413
TOPOLOGY = """
+----------+
| Host H2 |
| Source |
+----------+
.2 |
+-----------+ | +----------+
| | .1 | .11 | Host R11 |
+---------+ | R1 |---------+--------| PIM RP |
| Host H1 | 192.168.100.0/24 | | 192.168.101.0/24 +----------+
| receive |------------------| uses ACLs | | +----------+
|IGMP JOIN| .10 .1 | to pick | | .12 | Host R12 |
+---------+ | RP | +--------| PIM RP |
| | | +----------+
+-----------+ | +----------+
| .13 | Host R13 |
+--------| PIM RP |
| +----------+
| +----------+
| .14 | Host R14 |
+--------| PIM RP |
| +----------+
| +----------+
| .15 | Host R15 |
+--------| PIM RP |
+----------+
"""
import json
import functools
import os
import sys
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.
from lib.pim import McastTesterHelper
pytestmark = [pytest.mark.pimd, pytest.mark.ospfd]
def build_topo(tgen):
for hostNum in range(1, 3):
tgen.add_router("h{}".format(hostNum))
# Create the main router
tgen.add_router("r1")
# Create the PIM RP routers
for rtrNum in range(11, 16):
tgen.add_router("r{}".format(rtrNum))
# Setup Switches and connections
for swNum in range(1, 3):
tgen.add_switch("sw{}".format(swNum))
# Add connections H1 to R1 switch sw1
tgen.gears["h1"].add_link(tgen.gears["sw1"])
tgen.gears["r1"].add_link(tgen.gears["sw1"])
# Add connections R1 to R1x switch sw2
tgen.gears["r1"].add_link(tgen.gears["sw2"])
tgen.gears["h2"].add_link(tgen.gears["sw2"])
tgen.gears["r11"].add_link(tgen.gears["sw2"])
tgen.gears["r12"].add_link(tgen.gears["sw2"])
tgen.gears["r13"].add_link(tgen.gears["sw2"])
tgen.gears["r14"].add_link(tgen.gears["sw2"])
tgen.gears["r15"].add_link(tgen.gears["sw2"])
#####################################################
#
# Tests starting
#
#####################################################
def setup_module(module):
logger.info("PIM RP ACL Topology: \n {}".format(TOPOLOGY))
tgen = Topogen(build_topo, module.__name__)
tgen.start_topology()
# Starting Routers
router_list = tgen.routers()
for rname, router in router_list.items():
logger.info("Loading router %s" % rname)
router.load_config(
TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
)
if rname[0] != "h":
# Only load ospf on routers, not on end hosts
router.load_config(
TopoRouter.RD_OSPF, os.path.join(CWD, "{}/ospfd.conf".format(rname))
)
router.load_config(
TopoRouter.RD_PIM, os.path.join(CWD, "{}/pimd.conf".format(rname))
)
tgen.start_router()
def teardown_module():
tgen = get_topogen()
tgen.stop_topology()
def test_ospf_convergence():
"Test for OSPFv2 convergence"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("Checking OSPFv2 convergence on router r1")
router = tgen.gears["r1"]
reffile = os.path.join(CWD, "r1/ospf_neighbor.json")
expected = json.loads(open(reffile).read())
test_func = functools.partial(
topotest.router_json_cmp, router, "show ip ospf neighbor json", expected
)
_, res = topotest.run_and_expect(test_func, None, count=60, wait=2)
assertmsg = "OSPF router R1 did not converge"
assert res is None, assertmsg
def test_pim_convergence():
"Test for PIM convergence"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("Checking PIM convergence on router r1")
router = tgen.gears["r1"]
reffile = os.path.join(CWD, "r1/pim_neighbor.json")
expected = json.loads(open(reffile).read())
test_func = functools.partial(
topotest.router_json_cmp, router, "show ip pim neighbor json", expected
)
_, res = topotest.run_and_expect(test_func, None, count=60, wait=2)
assertmsg = "PIM router R1 did not converge"
assert res is None, assertmsg
def check_mcast_entry(entry, mcastaddr, pimrp):
"Helper function to check RP"
tgen = get_topogen()
logger.info(
"Testing PIM RP selection for ACL {} entry using {}".format(entry, mcastaddr)
)
with McastTesterHelper(tgen) as helper:
helper.run("h2", ["--send=0.7", mcastaddr, "h2-eth0"])
helper.run("h1", [mcastaddr, "h1-eth0"])
logger.info("mcast join and source for {} started".format(mcastaddr))
# tgen.mininet_cli()
router = tgen.gears["r1"]
reffile = os.path.join(CWD, "r1/acl_{}_pim_join.json".format(entry))
expected = json.loads(open(reffile).read())
logger.info("verifying pim join on r1 for {}".format(mcastaddr))
test_func = functools.partial(
topotest.router_json_cmp, router, "show ip pim join json", expected
)
_, res = topotest.run_and_expect(test_func, None, count=60, wait=2)
assertmsg = "PIM router r1 did not show join status"
assert res is None, assertmsg
logger.info("verifying pim join on PIM RP {} for {}".format(pimrp, mcastaddr))
router = tgen.gears[pimrp]
reffile = os.path.join(CWD, "{}/acl_{}_pim_join.json".format(pimrp, entry))
expected = json.loads(open(reffile).read())
test_func = functools.partial(
topotest.router_json_cmp, router, "show ip pim join json", expected
)
_, res = topotest.run_and_expect(test_func, None, count=60, wait=2)
assertmsg = "PIM router {} did not get selected as the PIM RP".format(pimrp)
assert res is None, assertmsg
return
def test_mcast_acl_1():
"Test 1st ACL entry 239.100.0.0/28 with 239.100.0.1"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
check_mcast_entry(1, "239.100.0.1", "r11")
def test_mcast_acl_2():
"Test 2nd ACL entry 239.100.0.17/32 with 239.100.0.17"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
check_mcast_entry(2, "239.100.0.17", "r12")
def test_mcast_acl_3():
"Test 3rd ACL entry 239.100.0.32/27 with 239.100.0.32"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
check_mcast_entry(3, "239.100.0.32", "r13")
def test_mcast_acl_4():
"Test 4th ACL entry 239.100.0.128/25 with 239.100.0.255"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
check_mcast_entry(4, "239.100.0.255", "r14")
def test_mcast_acl_5():
"Test 5th ACL entry 239.100.0.96/28 with 239.100.0.97"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
check_mcast_entry(5, "239.100.0.97", "r14")
def test_mcast_acl_6():
"Test 6th ACL entry 239.100.0.64/28 with 239.100.0.70"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
check_mcast_entry(6, "239.100.0.70", "r15")
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
|
