--- /dev/null
+#!/usr/bin/env python
+
+#
+# test_bgp_sender-as-path-loop-detection.py
+# Part of NetDEF Topology Tests
+#
+# Copyright (c) 2019 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 neighbor <neighbor> sender-as-path-loop-detection
+command works as expeced.
+"""
+
+import os
+import sys
+import json
+import time
+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.topolog import logger
+from mininet.topo import Topo
+
+class TemplateTopo(Topo):
+ def build(self, *_args, **_opts):
+ tgen = get_topogen(self)
+
+ for routern in range(1, 4):
+ 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'])
+
+def setup_module(mod):
+ tgen = Topogen(TemplateTopo, mod.__name__)
+ tgen.start_topology()
+
+ router_list = tgen.routers()
+
+ for i, (rname, router) in enumerate(router_list.iteritems(), 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_sender_as_path_loop_detection():
+ tgen = get_topogen()
+
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ router = tgen.gears['r2']
+
+ def _bgp_converge(router):
+ output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.255.2 json"))
+ expected = {
+ '192.168.255.2': {
+ 'bgpState': 'Established',
+ 'addressFamilyInfo': {
+ 'ipv4Unicast': {
+ 'acceptedPrefixCounter': 2
+ }
+ }
+ }
+ }
+ return topotest.json_cmp(output, expected)
+
+ def _bgp_has_route_from_r1(router):
+ output = json.loads(router.vtysh_cmd("show ip bgp 172.16.255.254/32 json"))
+ expected = {
+ 'paths': [
+ {
+ 'aspath': {
+ 'segments': [
+ {
+ 'type': 'as-sequence',
+ 'list': [
+ 65001,
+ 65003
+ ]
+ }
+ ],
+ 'length': 2
+ }
+ }
+ ]
+ }
+ return topotest.json_cmp(output, expected)
+
+ def _bgp_suppress_route_to_r3(router):
+ output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.254.2 advertised-routes json"))
+ expected = {
+ 'totalPrefixCounter': 0
+ }
+ return topotest.json_cmp(output, expected)
+
+ test_func = functools.partial(_bgp_converge, router)
+ success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+
+ assert result is None, 'Failed bgp convergence in "{}"'.format(router)
+
+ test_func = functools.partial(_bgp_has_route_from_r1, router)
+ success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+
+ assert result is None, 'Failed to see a route from r1 in "{}"'.format(router)
+
+ test_func = functools.partial(_bgp_suppress_route_to_r3, router)
+ success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+
+ assert result is None, 'Route 172.16.255.254/32 should not be sent to r3 "{}"'.format(router)
+
+if __name__ == '__main__':
+ args = ["-s"] + sys.argv[1:]
+ sys.exit(pytest.main(args))
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