tests/topotests/bgp_node_target_extcommunities/test_bgp_node_target_extcommunities.py

   1 #!/usr/bin/env python
   2 # SPDX-License-Identifier: ISC
   3
   4 # Copyright (c) 2023 by
   5 # Donatas Abraitis <donatas@opensourcerouting.org>
   6 #
   7
   8 """
   9 Test if Node Target Extended Communities works.
  10
  11 At r1 we set NT to 192.168.1.3 and 192.168.1.4 (this is the R3/R4 router-id),
  12 and that means 10.10.10.10/32 MUST be installed on R3 and R4, but not on R2,
  13 because this route does not have NT:192.168.1.2.
  14 """
  15
  16 import os
  17 import sys
  18 import json
  19 import pytest
  20 import functools
  21
  22 CWD = os.path.dirname(os.path.realpath(__file__))
  23 sys.path.append(os.path.join(CWD, "../"))
  24
  25 # pylint: disable=C0413
  26 from lib import topotest
  27 from lib.topogen import Topogen, TopoRouter, get_topogen
  28
  29 pytestmark = [pytest.mark.bgpd]
  30
  31
  32 def build_topo(tgen):
  33     for routern in range(1, 5):
  34         tgen.add_router("r{}".format(routern))
  35
  36     switch = tgen.add_switch("s1")
  37     switch.add_link(tgen.gears["r1"])
  38     switch.add_link(tgen.gears["r2"])
  39     switch.add_link(tgen.gears["r3"])
  40     switch.add_link(tgen.gears["r4"])
  41
  42
  43 def setup_module(mod):
  44     tgen = Topogen(build_topo, mod.__name__)
  45     tgen.start_topology()
  46
  47     router_list = tgen.routers()
  48
  49     for i, (rname, router) in enumerate(router_list.items(), 1):
  50         router.load_frr_config(os.path.join(CWD, "{}/frr.conf".format(rname)))
  51
  52     tgen.start_router()
  53
  54
  55 def teardown_module(mod):
  56     tgen = get_topogen()
  57     tgen.stop_topology()
  58
  59
  60 def test_bgp_node_target_extended_communities():
  61     tgen = get_topogen()
  62
  63     if tgen.routers_have_failure():
  64         pytest.skip(tgen.errors)
  65
  66     r1 = tgen.gears["r1"]
  67     r2 = tgen.gears["r2"]
  68     r3 = tgen.gears["r3"]
  69     r4 = tgen.gears["r4"]
  70
  71     def _bgp_converge():
  72         output = json.loads(r1.vtysh_cmd("show bgp summary json"))
  73         expected = {
  74             "ipv4Unicast": {
  75                 "peers": {
  76                     "192.168.1.2": {
  77                         "pfxSnt": 1,
  78                         "state": "Established",
  79                     },
  80                     "192.168.1.3": {
  81                         "pfxSnt": 1,
  82                         "state": "Established",
  83                     },
  84                     "192.168.1.4": {
  85                         "pfxSnt": 1,
  86                         "state": "Established",
  87                     },
  88                 }
  89             }
  90         }
  91         return topotest.json_cmp(output, expected)
  92
  93     test_func = functools.partial(_bgp_converge)
  94     _, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
  95     assert result is None, "Failed announcing 10.10.10.10/32 to r2, r3, and r4"
  96
  97     def _bgp_check_route(router, exists):
  98         output = json.loads(router.vtysh_cmd("show bgp ipv4 unicast json"))
  99         if exists:
 100             expected = {
 101                 "routes": {
 102                     "10.10.10.10/32": [
 103                         {
 104                             "valid": True,
 105                         }
 106                     ]
 107                 }
 108             }
 109         else:
 110             expected = {
 111                 "routes": {
 112                     "10.10.10.10/32": None,
 113                 }
 114             }
 115         return topotest.json_cmp(output, expected)
 116
 117     test_func = functools.partial(_bgp_check_route, r3, True)
 118     _, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
 119     assert result is None, "10.10.10.10/32 is not installed, but SHOULD be"
 120
 121     test_func = functools.partial(_bgp_check_route, r4, True)
 122     _, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
 123     assert result is None, "10.10.10.10/32 is not installed, but SHOULD be"
 124
 125     test_func = functools.partial(_bgp_check_route, r2, False)
 126     _, result = topotest.run_and_expect(test_func, None, count=30, wait=1)
 127     assert result is None, "10.10.10.10/32 is installed, but SHOULD NOT be"
 128
 129
 130 if __name__ == "__main__":
 131     args = ["-s"] + sys.argv[1:]
 132     sys.exit(pytest.main(args))