tests/topotests/bgp_as_wide_bgp_identifier/test_bgp_as_wide_bgp_identifier.py

   1 #!/usr/bin/env python
   2
   3 #
   4 # test_bgp_as_wide_bgp_identifier.py
   5 # Part of NetDEF Topology Tests
   6 #
   7 # Copyright (c) 2020 by
   8 # Donatas Abraitis <donatas.abraitis@gmail.com>
   9 #
  10 # Permission to use, copy, modify, and/or distribute this software
  11 # for any purpose with or without fee is hereby granted, provided
  12 # that the above copyright notice and this permission notice appear
  13 # in all copies.
  14 #
  15 # THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
  16 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  17 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
  18 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
  19 # DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  20 # WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  21 # ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  22 # OF THIS SOFTWARE.
  23 #
  24
  25 """
  26 rfc6286: Autonomous-System-Wide Unique BGP Identifier for BGP-4
  27 Test if 'Bad BGP Identifier' notification is sent only to
  28 internal peers (autonomous-system-wide). eBGP peers are not
  29 affected and should work.
  30 """
  31
  32 import os
  33 import sys
  34 import json
  35 import pytest
  36 import functools
  37
  38 CWD = os.path.dirname(os.path.realpath(__file__))
  39 sys.path.append(os.path.join(CWD, "../"))
  40
  41 # pylint: disable=C0413
  42 from lib import topotest
  43 from lib.topogen import Topogen, TopoRouter, get_topogen
  44
  45 pytestmark = [pytest.mark.bgpd]
  46
  47
  48 def build_topo(tgen):
  49     for routern in range(1, 4):
  50         tgen.add_router("r{}".format(routern))
  51
  52     switch = tgen.add_switch("s1")
  53     switch.add_link(tgen.gears["r1"])
  54     switch.add_link(tgen.gears["r2"])
  55     switch.add_link(tgen.gears["r3"])
  56
  57
  58 def setup_module(mod):
  59     tgen = Topogen(build_topo, mod.__name__)
  60     tgen.start_topology()
  61
  62     router_list = tgen.routers()
  63
  64     for i, (rname, router) in enumerate(router_list.items(), 1):
  65         router.load_config(
  66             TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
  67         )
  68         router.load_config(
  69             TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
  70         )
  71
  72     tgen.start_router()
  73
  74
  75 def teardown_module(mod):
  76     tgen = get_topogen()
  77     tgen.stop_topology()
  78
  79
  80 def test_bgp_as_wide_bgp_identifier():
  81     tgen = get_topogen()
  82
  83     if tgen.routers_have_failure():
  84         pytest.skip(tgen.errors)
  85
  86     def _bgp_converge(router):
  87         output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json"))
  88         expected = {"192.168.255.1": {"bgpState": "Established"}}
  89         return topotest.json_cmp(output, expected)
  90
  91     def _bgp_failed(router):
  92         output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json"))
  93         expected = {
  94             "192.168.255.1": {
  95                 "lastNotificationReason": "OPEN Message Error/Bad BGP Identifier"
  96             }
  97         }
  98         return topotest.json_cmp(output, expected)
  99
 100     test_func = functools.partial(_bgp_converge, tgen.gears["r1"])
 101     success, result = topotest.run_and_expect(test_func, None, count=260, wait=0.5)
 102
 103     assert result is None, 'Failed to converge: "{}"'.format(tgen.gears["r1"])
 104
 105     test_func = functools.partial(_bgp_failed, tgen.gears["r3"])
 106     success, result = topotest.run_and_expect(test_func, None, count=260, wait=0.5)
 107
 108     assert result is None, 'Bad BGP Identifier notification not sent: "{}"'.format(
 109         tgen.gears["r3"]
 110     )
 111
 112
 113 if __name__ == "__main__":
 114     args = ["-s"] + sys.argv[1:]
 115     sys.exit(pytest.main(args))