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#!/usr/bin/env python
#
# test_cspf_topo1.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2022 by Orange
# Author: Olivier Dugeon <olivier.dugeon@orange.com>
#
# 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_cspf_topo1.py: Test the FRR Constraint Shortest Path First algorithm.
+------------+
| |
| R1 |
| 10.0.225.1 |
| |
+------------+
r1-eth0| |r1-eth1
| |
10.0.0.0/24| |10.0.1.0/24
| |2001:db8:1:/64
| |
r2-eth0| |r2-eth1
+------------+ +------------+
| | | |
| R2 |r2-eth2 r3-eth0| R3 |
| 10.0.255.2 +------------------+ 10.0.255.3 |
| | 10.0.3.0/24 | |
+------------+ 2001:db8:3:/64 +------+-----+
r2-eth3| r3-eth1|
| |
10.0.4.0/24| |
| |
| |
r4-eth0| 2001:db8:5:/64|
+------------+ |
| | |
| R4 |r4-eth1 |
| 10.0.255.4 +-------------------------+
| |
+------------+
"""
import os
import sys
import json
from functools import partial
# 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
# and Finally pytest
import pytest
pytestmark = [pytest.mark.isisd]
def build_topo(tgen):
"Build function"
# Create 4 routers
for routern in range(1, 5):
tgen.add_router("r{}".format(routern))
# Interconect router 1 and 2 with 2 links
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["r2"])
# Interconect router 3 and 2
switch = tgen.add_switch("s3")
switch.add_link(tgen.gears["r3"])
switch.add_link(tgen.gears["r2"])
# Interconect router 4 and 2
switch = tgen.add_switch("s4")
switch.add_link(tgen.gears["r4"])
switch.add_link(tgen.gears["r2"])
# Interconnect router 3 and 4
switch = tgen.add_switch("s5")
switch.add_link(tgen.gears["r3"])
switch.add_link(tgen.gears["r4"])
def setup_module(mod):
"Sets up the pytest environment"
logger.info("\n\n---- Starting CSPF tests ----\n")
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for rname, router in router_list.items():
router.load_config(
TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
)
router.load_config(
TopoRouter.RD_ISIS, os.path.join(CWD, "{}/isisd.conf".format(rname))
)
if rname == "r1":
router.load_config(
TopoRouter.RD_SHARP, os.path.join(CWD, "{}/sharpd.conf".format("r1"))
)
# Initialize all routers.
tgen.start_router()
def teardown_module():
"Teardown the pytest environment"
tgen = get_topogen()
tgen.stop_topology()
logger.info("\n\n---- CSPF tests End ----\n")
def compare_ted_json_output(tgen, rname, fileref):
"Compare TED JSON output"
logger.info('Comparing router "%s" TED output', rname)
filename = "{}/reference/{}".format(CWD, fileref)
expected = json.loads(open(filename).read())
command = "show sharp ted json"
# Run test function until we get an result. Wait at most 60 seconds.
test_func = partial(topotest.router_json_cmp, tgen.gears[rname], command, expected)
_, diff = topotest.run_and_expect(test_func, None, count=60, wait=2)
assertmsg = '"{}" TED JSON output mismatches the expected result'.format(rname)
assert diff is None, assertmsg
def compare_cspf_output(tgen, rname, fileref, src, dst, cost, bw=""):
"Compare CSPF output"
logger.info('Comparing router "%s" CSPF output', rname)
filename = "{}/reference/{}".format(CWD, fileref)
expected = open(filename).read()
command = "show sharp cspf source {} destination {} {} {}".format(src, dst, cost, bw)
# Run test function until we get an result. Wait at most 60 seconds.
test_func = partial(topotest.router_output_cmp, tgen.gears[rname], command, expected)
result, diff = topotest.run_and_expect(test_func, "", count=2, wait=2)
assert result, "CSPF output mismatches the expected result on {}:\n{}".format(rname, diff)
def setup_testcase(msg):
"Setup test case"
logger.info(msg)
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
return tgen
# Note that all routers must discover the same Network Topology, so the same TED.
def test_step1():
"Step1: Check initial topology"
tgen = setup_testcase("Step1: test initial IS-IS TE Data Base import")
tgen.net["r1"].cmd('vtysh -c "sharp import-te"')
compare_ted_json_output(tgen, "r1", "sharp-ted.json")
def test_step2():
"Step2: Test CSPF from r1 to r4 for IPv4 with various metric"
tgen = setup_testcase("Step2: CSPF(r1, r4, IPv4)")
compare_cspf_output(tgen, "r1", "cspf-ipv4-metric.txt", "10.0.0.1", "10.0.255.4", "metric 50")
compare_cspf_output(tgen, "r1", "cspf-ipv4-te-metric.txt", "10.0.255.1", "10.0.4.4", "te-metric 50")
compare_cspf_output(tgen, "r1", "cspf-ipv4-delay.txt", "10.0.255.1", "10.0.255.4", "delay 50000")
compare_cspf_output(tgen, "r1", "cspf-ipv4-delay.txt", "10.0.255.1", "10.0.255.4", "delay 50000", "rsv 7 100000000")
def test_step3():
"Step3: Test CSPF from r1 to r4 for IPv6 with various metric"
tgen = setup_testcase("Step2: CSPF(r1, r4, IPv6)")
compare_cspf_output(tgen, "r1", "cspf-ipv6-metric.txt", "2001:db8:1::1:1", "2001:db8::4", "metric 50")
compare_cspf_output(tgen, "r1", "cspf-ipv6-te-metric.txt", "2001:db8::1", "2001:db8:5::3:4", "te-metric 80")
compare_cspf_output(tgen, "r1", "cspf-ipv6-delay.txt", "2001:db8::1", "2001:db8::4", "delay 80000")
compare_cspf_output(tgen, "r1", "cspf-ipv6-delay.txt", "2001:db8::1", "2001:db8::4", "delay 80000", "rsv 7 100000000")
def test_step4():
"Step4: Test CSPF from r1 to r4 with no possible path"
tgen = setup_testcase("Step2: CSPF(r1, r4, failure)")
compare_cspf_output(tgen, "r1", "cspf-failed.txt", "10.0.255.1", "10.0.255.4", "metric 10")
compare_cspf_output(tgen, "r1", "cspf-failed.txt", "2001:db8::1", "2001:db8::4", "te-metric 50")
compare_cspf_output(tgen, "r1", "cspf-failed.txt", "10.0.255.1", "10.0.255.4", "delay 5000")
compare_cspf_output(tgen, "r1", "cspf-failed.txt", "2001:db8::1", "2001:db8::4", "delay 80000", "rsv 7 1000000000")
compare_cspf_output(tgen, "r1", "cspf-failed-src.txt", "10.0.0.3", "10.0.255.4", "metric 10")
compare_cspf_output(tgen, "r1", "cspf-failed-dst.txt", "10.0.0.1", "10.0.4.40", "metric 10")
compare_cspf_output(tgen, "r1", "cspf-failed-same.txt", "10.0.0.1", "10.0.0.1", "metric 10")
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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