diff options
Diffstat (limited to 'tests/topotests/bgp_blackhole_community')
10 files changed, 221 insertions, 0 deletions
diff --git a/tests/topotests/bgp_blackhole_community/__init__.py b/tests/topotests/bgp_blackhole_community/__init__.py new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/__init__.py diff --git a/tests/topotests/bgp_blackhole_community/r1/bgpd.conf b/tests/topotests/bgp_blackhole_community/r1/bgpd.conf new file mode 100644 index 0000000..574d199 --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/r1/bgpd.conf @@ -0,0 +1,14 @@ +! +router bgp 65001 + timers bgp 3 9 + no bgp ebgp-requires-policy + neighbor r1-eth0 interface remote-as external + address-family ipv4 unicast + redistribute connected + neighbor r1-eth0 route-map r2 out + exit-address-family + ! +! +route-map r2 permit 10 + set community blackhole +! diff --git a/tests/topotests/bgp_blackhole_community/r1/zebra.conf b/tests/topotests/bgp_blackhole_community/r1/zebra.conf new file mode 100644 index 0000000..70dc5e5 --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/r1/zebra.conf @@ -0,0 +1,10 @@ +! +interface lo + ip address 172.16.255.254/32 +! +interface r1-eth0 + ip address 192.168.0.1/24 +! +ip forwarding +! + diff --git a/tests/topotests/bgp_blackhole_community/r2/bgpd.conf b/tests/topotests/bgp_blackhole_community/r2/bgpd.conf new file mode 100644 index 0000000..2260613 --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/r2/bgpd.conf @@ -0,0 +1,8 @@ +! +router bgp 65002 + no bgp ebgp-requires-policy + timers bgp 3 9 + neighbor r2-eth0 interface remote-as external + neighbor r2-eth1 interface remote-as external + neighbor r2-eth2 interface remote-as internal +! diff --git a/tests/topotests/bgp_blackhole_community/r2/zebra.conf b/tests/topotests/bgp_blackhole_community/r2/zebra.conf new file mode 100644 index 0000000..cf6fb6d --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/r2/zebra.conf @@ -0,0 +1,12 @@ +! +interface r2-eth0 + ip address 192.168.0.2/24 +! +interface r2-eth1 + ip address 192.168.1.1/24 +! +interface r2-eth2 + ip address 192.168.2.1/24 +! +ip forwarding +! diff --git a/tests/topotests/bgp_blackhole_community/r3/bgpd.conf b/tests/topotests/bgp_blackhole_community/r3/bgpd.conf new file mode 100644 index 0000000..d0c4b40 --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/r3/bgpd.conf @@ -0,0 +1,6 @@ +! +router bgp 65003 + timers bgp 3 9 + no bgp ebgp-requires-policy + neighbor r3-eth0 interface remote-as external +! diff --git a/tests/topotests/bgp_blackhole_community/r3/zebra.conf b/tests/topotests/bgp_blackhole_community/r3/zebra.conf new file mode 100644 index 0000000..05ab56d --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/r3/zebra.conf @@ -0,0 +1,6 @@ +! +interface r3-eth0 + ip address 192.168.1.2/24 +! +ip forwarding +! diff --git a/tests/topotests/bgp_blackhole_community/r4/bgpd.conf b/tests/topotests/bgp_blackhole_community/r4/bgpd.conf new file mode 100644 index 0000000..0ac963e --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/r4/bgpd.conf @@ -0,0 +1,6 @@ +! +router bgp 65002 + timers bgp 3 9 + no bgp ebgp-requires-policy + neighbor r4-eth0 interface remote-as internal +! diff --git a/tests/topotests/bgp_blackhole_community/r4/zebra.conf b/tests/topotests/bgp_blackhole_community/r4/zebra.conf new file mode 100644 index 0000000..e2ccaed --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/r4/zebra.conf @@ -0,0 +1,6 @@ +! +interface r4-eth0 + ip address 192.168.2.2/24 +! +ip forwarding +! diff --git a/tests/topotests/bgp_blackhole_community/test_bgp_blackhole_community.py b/tests/topotests/bgp_blackhole_community/test_bgp_blackhole_community.py new file mode 100644 index 0000000..4f8fc0d --- /dev/null +++ b/tests/topotests/bgp_blackhole_community/test_bgp_blackhole_community.py @@ -0,0 +1,153 @@ +#!/usr/bin/env python + +# +# Copyright (c) 2021 by +# Donatas Abraitis <donatas.abraitis@gmail.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 if 172.16.255.254/32 tagged with BLACKHOLE community is not +re-advertised downstream outside local AS. +""" + +import os +import sys +import json +import pytest +import functools + +CWD = os.path.dirname(os.path.realpath(__file__)) +sys.path.append(os.path.join(CWD, "../")) + +# pylint: disable=C0413 +from lib import topotest +from lib.topogen import Topogen, TopoRouter, get_topogen +from lib.common_config import step + +pytestmark = [pytest.mark.bgpd] + + +def build_topo(tgen): + 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): + tgen = Topogen(build_topo, mod.__name__) + tgen.start_topology() + + router_list = tgen.routers() + + for i, (rname, router) in enumerate(router_list.items(), 1): + router.load_config( + TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname)) + ) + router.load_config( + TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname)) + ) + + tgen.start_router() + + +def teardown_module(mod): + tgen = get_topogen() + tgen.stop_topology() + + +def test_bgp_blackhole_community(): + tgen = get_topogen() + + if tgen.routers_have_failure(): + pytest.skip(tgen.errors) + + def _bgp_converge(): + output = json.loads( + tgen.gears["r2"].vtysh_cmd("show ip bgp 172.16.255.254/32 json") + ) + expected = {"paths": [{"community": {"list": ["blackhole", "noExport"]}}]} + return topotest.json_cmp(output, expected) + + def _bgp_no_advertise_ebgp(): + output = json.loads( + tgen.gears["r2"].vtysh_cmd( + "show ip bgp neighbor r2-eth1 advertised-routes json" + ) + ) + expected = { + "advertisedRoutes": {}, + "totalPrefixCounter": 0, + "filteredPrefixCounter": 0, + } + + return topotest.json_cmp(output, expected) + + def _bgp_no_advertise_ibgp(): + output = json.loads( + tgen.gears["r2"].vtysh_cmd( + "show ip bgp neighbor r2-eth2 advertised-routes json" + ) + ) + expected = { + "advertisedRoutes": {"172.16.255.254/32": {}}, + "totalPrefixCounter": 2, + } + + return topotest.json_cmp(output, expected) + + test_func = functools.partial(_bgp_converge) + success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5) + + assert result is None, 'Failed bgp convergence in "{}"'.format(tgen.gears["r2"]) + + step("Check if 172.16.255.254/32 is not advertised to eBGP peers") + + test_func = functools.partial(_bgp_no_advertise_ebgp) + success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5) + + assert ( + result is None + ), 'Advertised blackhole tagged prefix to eBGP peers in "{}"'.format( + tgen.gears["r2"] + ) + + step("Check if 172.16.255.254/32 is advertised to iBGP peers") + + test_func = functools.partial(_bgp_no_advertise_ibgp) + success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5) + + assert ( + result is None + ), 'Withdrawn blackhole tagged prefix to iBGP peers in "{}"'.format( + tgen.gears["r2"] + ) + + +if __name__ == "__main__": + args = ["-s"] + sys.argv[1:] + sys.exit(pytest.main(args)) |