--- /dev/null
+#!/usr/bin/env python
+# SPDX-License-Identifier: ISC
+
+#
+# Copyright (c) 2022 by
+# Donatas Abraitis <donatas@opensourcerouting.org>
+#
+
+"""
+Check if bgpd do not crash if we use default-originate while
+received a default route from the neighbor as well. 0.0.0.0/0
+MUST be kept in RIB even if we remove default-originate from
+the neighbor.
+"""
+
+import os
+import sys
+import json
+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.common_config import step
+
+pytestmark = [pytest.mark.bgpd]
+
+
+def build_topo(tgen):
+ 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["r1"])
+ switch.add_link(tgen.gears["r3"])
+
+
+def setup_module(mod):
+ tgen = Topogen(build_topo, mod.__name__)
+ tgen.start_topology()
+
+ router_list = tgen.routers()
+
+ for i, (rname, router) in enumerate(router_list.items(), 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_default_originate_with_default_received():
+ tgen = get_topogen()
+ if tgen.routers_have_failure():
+ pytest.skip(tgen.errors)
+
+ r1 = tgen.gears["r1"]
+
+ def _bgp_default_received_from_r3():
+ output = json.loads(r1.vtysh_cmd("show bgp ipv4 unicast 0.0.0.0/0 json"))
+ expected = {
+ "paths": [
+ {
+ "nexthops": [
+ {
+ "hostname": "r3",
+ "ip": "192.168.2.2",
+ }
+ ],
+ }
+ ],
+ }
+ return topotest.json_cmp(output, expected)
+
+ test_func = functools.partial(_bgp_default_received_from_r3)
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+ assert result is None, "Cannot see default route received from r3"
+
+ def _bgp_advertised_default_originate_to_r2():
+ output = json.loads(
+ r1.vtysh_cmd(
+ "show bgp ipv4 unicast neighbors 192.168.1.2 advertised-routes json"
+ )
+ )
+ expected = {
+ "bgpOriginatingDefaultNetwork": "0.0.0.0/0",
+ }
+ return topotest.json_cmp(output, expected)
+
+ test_func = functools.partial(_bgp_advertised_default_originate_to_r2)
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+ assert result is None, "Cannot see default-originate route advertised to r2"
+
+ step("Disable default-originate for r2")
+ r1.vtysh_cmd(
+ """
+ configure
+ router bgp
+ address-family ipv4 unicast
+ no neighbor 192.168.1.2 default-originate
+ """
+ )
+
+ def _bgp_advertised_default_from_r3_to_r2():
+ output = json.loads(
+ r1.vtysh_cmd(
+ "show bgp ipv4 unicast neighbors 192.168.1.2 advertised-routes json"
+ )
+ )
+ expected = {
+ "bgpOriginatingDefaultNetwork": None,
+ "advertisedRoutes": {
+ "0.0.0.0/0": {
+ "valid": True,
+ }
+ },
+ }
+ return topotest.json_cmp(output, expected)
+
+ test_func = functools.partial(_bgp_advertised_default_from_r3_to_r2)
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+ assert result is None, "Cannot see default route advertised to r2"
+
+ step("Enable default-originate for r2")
+ r1.vtysh_cmd(
+ """
+ configure
+ router bgp
+ address-family ipv4 unicast
+ neighbor 192.168.1.2 default-originate
+ do clear ip bgp *
+ """
+ )
+
+ step("Check if default-originate route advertised to r2")
+ test_func = functools.partial(_bgp_advertised_default_originate_to_r2)
+ _, result = topotest.run_and_expect(test_func, None, count=60, wait=0.5)
+ assert result is None, "Cannot see default-originate route advertised to r2"
+
+
+if __name__ == "__main__":
+ args = ["-s"] + sys.argv[1:]
+ sys.exit(pytest.main(args))
projects / mirror_frr.git / commitdiff