tests/topotests/bgp_orf/test_bgp_orf.py

   1 #!/usr/bin/env python
   2
   3 # Copyright (c) 2022 by
   4 # Donatas Abraitis <donatas@opensourcerouting.org>
   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 ORF filtering is working correctly when modifying
  23 prefix-list.
  24
  25 Initially advertise 10.10.10.1/32 from R1 to R2. Add new prefix
  26 10.10.10.2/32 to r1 prefix list on R2. Test if we updated ORF
  27 prefix-list correctly.
  28 """
  29
  30 import os
  31 import sys
  32 import json
  33 import pytest
  34 import functools
  35
  36 pytestmark = pytest.mark.bgpd
  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 setup_module(mod):
  49     topodef = {"s1": ("r1", "r2")}
  50     tgen = Topogen(topodef, mod.__name__)
  51     tgen.start_topology()
  52
  53     router_list = tgen.routers()
  54
  55     for i, (rname, router) in enumerate(router_list.items(), 1):
  56         router.load_config(
  57             TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
  58         )
  59         router.load_config(
  60             TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
  61         )
  62
  63     tgen.start_router()
  64
  65
  66 def teardown_module(mod):
  67     tgen = get_topogen()
  68     tgen.stop_topology()
  69
  70
  71 def test_bgp_orf():
  72     tgen = get_topogen()
  73
  74     if tgen.routers_have_failure():
  75         pytest.skip(tgen.errors)
  76
  77     r1 = tgen.gears["r1"]
  78     r2 = tgen.gears["r2"]
  79
  80     def _bgp_converge_r1():
  81         output = json.loads(
  82             r1.vtysh_cmd(
  83                 "show bgp ipv4 unicast neighbor 192.168.1.2 advertised-routes json"
  84             )
  85         )
  86         expected = {"advertisedRoutes": {"10.10.10.1/32": {}, "10.10.10.2/32": None}}
  87         return topotest.json_cmp(output, expected)
  88
  89     test_func = functools.partial(_bgp_converge_r1)
  90     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
  91     assert result is None, "Can't apply ORF from R1 to R2"
  92
  93     def _bgp_converge_r2():
  94         output = json.loads(r2.vtysh_cmd("show bgp ipv4 unicast summary json"))
  95         expected = {
  96             "peers": {
  97                 "192.168.1.1": {
  98                     "pfxRcd": 1,
  99                     "pfxSnt": 1,
 100                     "state": "Established",
 101                     "peerState": "OK",
 102                 }
 103             }
 104         }
 105         return topotest.json_cmp(output, expected)
 106
 107     test_func = functools.partial(_bgp_converge_r2)
 108     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
 109     assert result is None, "ORF filtering is not working from R1 to R2"
 110
 111     r2.vtysh_cmd(
 112         """
 113         configure terminal
 114         ip prefix-list r1 seq 10 permit 10.10.10.2/32
 115     """
 116     )
 117
 118     def _bgp_orf_changed_r1():
 119         output = json.loads(
 120             r1.vtysh_cmd(
 121                 "show bgp ipv4 unicast neighbor 192.168.1.2 advertised-routes json"
 122             )
 123         )
 124         expected = {"advertisedRoutes": {"10.10.10.1/32": {}, "10.10.10.2/32": {}}}
 125         return topotest.json_cmp(output, expected)
 126
 127     test_func = functools.partial(_bgp_orf_changed_r1)
 128     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
 129     assert result is None, "Can't apply new ORF from R1 to R2"
 130
 131     def _bgp_orf_changed_r2():
 132         output = json.loads(r2.vtysh_cmd("show bgp ipv4 unicast json"))
 133         expected = {
 134             "routes": {
 135                 "10.10.10.1/32": [{"valid": True}],
 136                 "10.10.10.2/32": [{"valid": True}],
 137             }
 138         }
 139         return topotest.json_cmp(output, expected)
 140
 141     test_func = functools.partial(_bgp_orf_changed_r2)
 142     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
 143     assert result is None, "New ORF filtering is not working from R1 to R2"
 144
 145     r2.vtysh_cmd(
 146         """
 147         configure terminal
 148         no ip prefix-list r1 seq 10 permit 10.10.10.2/32
 149     """
 150     )
 151
 152     test_func = functools.partial(_bgp_converge_r1)
 153     _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
 154     assert result is None, "Can't apply initial ORF from R1 to R2"
 155
 156
 157 if __name__ == "__main__":
 158     args = ["-s"] + sys.argv[1:]
 159     sys.exit(pytest.main(args))