274 lines
8.2 KiB
Python
274 lines
8.2 KiB
Python
#!/usr/bin/env python
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# SPDX-License-Identifier: ISC
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#
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# test_nhrp_topo.py
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# Part of NetDEF Topology Tests
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#
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# Copyright (c) 2019 by
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# Network Device Education Foundation, Inc. ("NetDEF")
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#
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"""
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test_nhrp_topo.py: Test the FRR/Quagga NHRP daemon
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"""
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import os
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import sys
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import json
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from functools import partial
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import pytest
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# Save the Current Working Directory to find configuration files.
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CWD = os.path.dirname(os.path.realpath(__file__))
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sys.path.append(os.path.join(CWD, "../"))
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# pylint: disable=C0413
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# Import topogen and topotest helpers
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from lib import topotest
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from lib.topogen import Topogen, TopoRouter, get_topogen
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from lib.topolog import logger
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from lib.common_config import required_linux_kernel_version
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# Required to instantiate the topology builder class.
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pytestmark = [pytest.mark.nhrpd]
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def build_topo(tgen):
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"Build function"
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# Create 3 routers.
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for routern in range(1, 4):
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tgen.add_router("r{}".format(routern))
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switch = tgen.add_switch("s1")
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switch.add_link(tgen.gears["r1"])
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switch.add_link(tgen.gears["r3"])
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switch = tgen.add_switch("s2")
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switch.add_link(tgen.gears["r2"])
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switch.add_link(tgen.gears["r3"])
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switch = tgen.add_switch("s3")
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switch.add_link(tgen.gears["r2"])
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switch = tgen.add_switch("s4")
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switch.add_link(tgen.gears["r1"])
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def _populate_iface():
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tgen = get_topogen()
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cmds_tot_hub = [
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"ip tunnel add {0}-gre0 mode gre ttl 64 key 42 dev {0}-eth0 local 10.2.1.{1} remote 0.0.0.0",
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"ip link set dev {0}-gre0 up",
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"echo 0 > /proc/sys/net/ipv4/ip_forward_use_pmtu",
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"echo 1 > /proc/sys/net/ipv6/conf/{0}-eth0/disable_ipv6",
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"echo 1 > /proc/sys/net/ipv6/conf/{0}-gre0/disable_ipv6",
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]
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cmds_tot = [
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"ip tunnel add {0}-gre0 mode gre ttl 64 key 42 dev {0}-eth0 local 10.1.1.{1} remote 0.0.0.0",
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"ip link set dev {0}-gre0 up",
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"echo 0 > /proc/sys/net/ipv4/ip_forward_use_pmtu",
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"echo 1 > /proc/sys/net/ipv6/conf/{0}-eth0/disable_ipv6",
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"echo 1 > /proc/sys/net/ipv6/conf/{0}-gre0/disable_ipv6",
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]
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for cmd in cmds_tot_hub:
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input = cmd.format("r2", "2")
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logger.info("input: " + input)
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output = tgen.net["r2"].cmd(input)
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logger.info("output: " + output)
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for cmd in cmds_tot:
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input = cmd.format("r1", "1")
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logger.info("input: " + input)
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output = tgen.net["r1"].cmd(input)
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logger.info("output: " + output)
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def setup_module(mod):
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"Sets up the pytest environment"
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result = required_linux_kernel_version("5.0")
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if result is not True:
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pytest.skip("Kernel requirements are not met")
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tgen = Topogen(build_topo, mod.__name__)
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tgen.start_topology()
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router_list = tgen.routers()
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_populate_iface()
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for rname, router in router_list.items():
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router.load_config(
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TopoRouter.RD_ZEBRA,
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os.path.join(CWD, "{}/zebra.conf".format(rname)),
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)
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if rname in ("r1", "r2"):
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router.load_config(
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TopoRouter.RD_NHRP, os.path.join(CWD, "{}/nhrpd.conf".format(rname))
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)
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# Include sharpd for r1
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if rname == "r1":
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router.load_config(
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TopoRouter.RD_SHARP, os.path.join(CWD, "{}/sharpd.conf".format(rname))
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)
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# Initialize all routers.
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logger.info("Launching NHRP")
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for name in router_list:
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router = tgen.gears[name]
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router.start()
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def teardown_module(_mod):
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"Teardown the pytest environment"
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tgen = get_topogen()
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tgen.stop_topology()
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def test_protocols_convergence():
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"""
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Assert that all protocols have converged before checking for the NHRP
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statuses as they depend on it.
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"""
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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# Check IPv4 routing tables.
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logger.info("Checking NHRP cache and IPv4 routes for convergence")
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router_list = tgen.routers()
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for rname, router in router_list.items():
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if rname == "r3":
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continue
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json_file = "{}/{}/nhrp4_cache.json".format(CWD, router.name)
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if not os.path.isfile(json_file):
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logger.info("skipping file {}".format(json_file))
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continue
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expected = json.loads(open(json_file).read())
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test_func = partial(
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topotest.router_json_cmp, router, "show ip nhrp cache json", expected
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)
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_, result = topotest.run_and_expect(test_func, None, count=40, wait=0.5)
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output = router.vtysh_cmd("show ip nhrp cache")
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logger.info(output)
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assertmsg = '"{}" JSON output mismatches'.format(router.name)
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assert result is None, assertmsg
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for rname, router in router_list.items():
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if rname == "r3":
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continue
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json_file = "{}/{}/nhrp_route4.json".format(CWD, router.name)
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if not os.path.isfile(json_file):
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logger.info("skipping file {}".format(json_file))
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continue
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expected = json.loads(open(json_file).read())
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test_func = partial(
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topotest.router_json_cmp, router, "show ip route nhrp json", expected
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)
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_, result = topotest.run_and_expect(test_func, None, count=40, wait=0.5)
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output = router.vtysh_cmd("show ip route nhrp")
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logger.info(output)
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assertmsg = '"{}" JSON output mismatches'.format(router.name)
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assert result is None, assertmsg
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# check that the NOARP flag is removed from rX-gre0 interfaces
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for rname, router in router_list.items():
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if rname == "r3":
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continue
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expected = {
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"{}-gre0".format(rname): {
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"flags": "<UP,LOWER_UP,RUNNING>",
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}
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}
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test_func = partial(
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topotest.router_json_cmp,
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router,
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"show interface {}-gre0 json".format(rname),
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expected,
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)
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_, result = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
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assertmsg = '"{}-gre0 interface flags incorrect'.format(router.name)
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assert result is None, assertmsg
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for rname, router in router_list.items():
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if rname == "r3":
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continue
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logger.info("Dump neighbor information on {}-gre0".format(rname))
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output = router.run("ip neigh show")
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logger.info(output)
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def test_nhrp_connection():
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"Assert that the NHRP peers can find themselves."
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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pingrouter = tgen.gears["r1"]
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logger.info("Check Ping IPv4 from R1 to R2 = 10.255.255.2)")
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output = pingrouter.run("ping 10.255.255.2 -f -c 1000")
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logger.info(output)
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if "1000 packets transmitted, 1000 received" not in output:
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assertmsg = "expected ping IPv4 from R1 to R2 should be ok"
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assert 0, assertmsg
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else:
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logger.info("Check Ping IPv4 from R1 to R2 OK")
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def test_route_install():
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"Test use of NHRP routes by other protocols (sharpd here)."
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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logger.info("Testing route install over NHRP tunnel")
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# Install sharpd routes over an NHRP route
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r1 = tgen.gears["r1"]
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# Install one recursive and one non-recursive sharpd route
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r1.vtysh_cmd("sharp install route 4.4.4.1 nexthop 10.255.255.2 1")
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r1.vtysh_cmd("sharp install route 5.5.5.1 nexthop 10.255.255.2 1 no-recurse")
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json_file = "{}/{}/sharp_route4.json".format(CWD, "r1")
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expected = json.loads(open(json_file).read())
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test_func = partial(
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topotest.router_json_cmp, r1, "show ip route sharp json", expected
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)
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_, result = topotest.run_and_expect(test_func, None, count=20, wait=0.5)
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logger.info("Sharp routes:")
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output = r1.vtysh_cmd("show ip route sharp")
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logger.info(output)
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assertmsg = '"{}" JSON route output mismatches'.format(r1.name)
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assert result is None, assertmsg
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def test_memory_leak():
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"Run the memory leak test and report results."
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tgen = get_topogen()
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if not tgen.is_memleak_enabled():
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pytest.skip("Memory leak test/report is disabled")
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tgen.report_memory_leaks()
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if __name__ == "__main__":
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args = ["-s"] + sys.argv[1:]
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sys.exit(pytest.main(args))
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