tests/topotests/bgp_dont_capability_negotiate/test_bgp_dont_capability_negotiate.py

   1 #!/usr/bin/env python
   2
   3 # Copyright (c) 2021 by
   4 # Donatas Abraitis <donatas.abraitis@gmail.com>
   5 #
   6 # Permission to use, copy, modify, and/or distribute this software
   7 # for any purpose with or without fee is hereby granted, provided
   8 # that the above copyright notice and this permission notice appear
   9 # in all copies.
  10 #
  11 # THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
  12 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
  14 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
  15 # DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  16 # WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  17 # ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  18 # OF THIS SOFTWARE.
  19 #
  20
  21 """
  22 Test if BGP connection is established if at least one peer
  23 sets `dont-capability-negotiate`.
  24 """
  25
  26 import os
  27 import sys
  28 import json
  29 import pytest
  30 import functools
  31
  32 pytestmark = pytest.mark.bgpd
  33
  34 CWD = os.path.dirname(os.path.realpath(__file__))
  35 sys.path.append(os.path.join(CWD, "../"))
  36
  37 # pylint: disable=C0413
  38 from lib import topotest
  39 from lib.topogen import Topogen, TopoRouter, get_topogen
  40
  41 pytestmark = [pytest.mark.bgpd]
  42
  43
  44 def setup_module(mod):
  45     topodef = {"s1": ("r1", "r2")}
  46     tgen = Topogen(topodef, mod.__name__)
  47     tgen.start_topology()
  48
  49     router_list = tgen.routers()
  50
  51     for i, (rname, router) in enumerate(router_list.items(), 1):
  52         router.load_config(
  53             TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
  54         )
  55         router.load_config(
  56             TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
  57         )
  58
  59     tgen.start_router()
  60
  61
  62 def teardown_module(mod):
  63     tgen = get_topogen()
  64     tgen.stop_topology()
  65
  66
  67 def test_bgp_dont_capability_negotiate():
  68     tgen = get_topogen()
  69
  70     if tgen.routers_have_failure():
  71         pytest.skip(tgen.errors)
  72
  73     router = tgen.gears["r1"]
  74
  75     def _bgp_converge(router):
  76         output = json.loads(router.vtysh_cmd("show bgp ipv4 unicast summary json"))
  77         expected = {
  78             "peers": {
  79                 "192.168.1.2": {
  80                     "pfxRcd": 2,
  81                     "pfxSnt": 2,
  82                     "state": "Established",
  83                     "peerState": "OK",
  84                 }
  85             }
  86         }
  87         return topotest.json_cmp(output, expected)
  88
  89     test_func = functools.partial(_bgp_converge, router)
  90     success, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
  91     assert result is None, "Can't converge with dont-capability-negotiate"
  92
  93
  94 if __name__ == "__main__":
  95     args = ["-s"] + sys.argv[1:]
  96     sys.exit(pytest.main(args))