Merge pull request #8901 from ton31337/feature/bgp_default_route_originate_match

tests: Add an additional conditional BGP default route advertisement

tests/topotests/bgp_default_route_route_map_match2/r1/bgpd.conf

@@ -0,0 +1,13 @@
+router bgp 65000
+  no bgp ebgp-requires-policy
+  neighbor 192.168.255.2 remote-as 65001
+  neighbor 192.168.255.2 timers 3 10
+  address-family ipv4 unicast
+    neighbor 192.168.255.2 default-originate route-map default
+  exit-address-family
+!
+ip prefix-list r2 permit 10.0.0.0/22
+!
+route-map default permit 10
+  match ip address prefix-list r2
+!

tests/topotests/bgp_default_route_route_map_match2/r1/zebra.conf

@@ -0,0 +1,6 @@
+!
+interface r1-eth0
+ ip address 192.168.255.1/24
+!
+ip forwarding
+!

tests/topotests/bgp_default_route_route_map_match2/r2/bgpd.conf

@@ -0,0 +1,8 @@
+router bgp 65001
+  no bgp ebgp-requires-policy
+  neighbor 192.168.255.1 remote-as 65000
+  neighbor 192.168.255.1 timers 3 10
+  address-family ipv4 unicast
+    redistribute connected
+  exit-address-family
+!

tests/topotests/bgp_default_route_route_map_match2/r2/zebra.conf

@@ -0,0 +1,9 @@
+!
+interface lo
+ ip address 10.0.0.1/22
+!
+interface r2-eth0
+ ip address 192.168.255.2/24
+!
+ip forwarding
+!

tests/topotests/bgp_default_route_route_map_match2/test_bgp_default-originate_route-map_match2.py

@@ -0,0 +1,138 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2021 by
+# Donatas Abraitis <donatas.abraitis@gmail.com>
+#
+# Permission to use, copy, modify, and/or distribute this software
+# for any purpose with or without fee is hereby granted, provided
+# that the above copyright notice and this permission notice appear
+# in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
+# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+# OF THIS SOFTWARE.
+#
+
+"""
+Test if default-originate works with conditional match.
+If 10.0.0.0/22 is recived from r2, then we announce 0.0.0.0/0
+to r2.
+"""
+
+import os
+import sys
+import json
+import time
+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.topolog import logger
+from mininet.topo import Topo
+from lib.common_config import step
+
+
+class TemplateTopo(Topo):
+    def build(self, *_args, **_opts):
+        tgen = get_topogen(self)
+
+        for routern in range(1, 3):
+            tgen.add_router("r{}".format(routern))
+
+        switch = tgen.add_switch("s1")
+        switch.add_link(tgen.gears["r1"])
+        switch.add_link(tgen.gears["r2"])
+
+
+def setup_module(mod):
+    tgen = Topogen(TemplateTopo, 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_route_map():
+    tgen = get_topogen()
+
+    if tgen.routers_have_failure():
+        pytest.skip(tgen.errors)
+
+    router = tgen.gears["r2"]
+
+    def _bgp_converge(router):
+        output = json.loads(router.vtysh_cmd("show ip bgp neighbor 192.168.255.1 json"))
+        expected = {
+            "192.168.255.1": {
+                "bgpState": "Established",
+                "addressFamilyInfo": {"ipv4Unicast": {"acceptedPrefixCounter": 1}},
+            }
+        }
+        return topotest.json_cmp(output, expected)
+
+    def _bgp_default_route_is_valid(router):
+        output = json.loads(router.vtysh_cmd("show ip bgp 0.0.0.0/0 json"))
+        expected = {"paths": [{"valid": True}]}
+        return topotest.json_cmp(output, expected)
+
+    step("Converge network")
+    test_func = functools.partial(_bgp_converge, router)
+    success, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
+    assert result is None, "Failed to see bgp convergence at r2"
+
+    step("Withdraw 10.0.0.0/22 from R2")
+    router.vtysh_cmd(
+        "conf t\nrouter bgp\naddress-family ipv4\nno redistribute connected"
+    )
+
+    step("Check if we don't have 0.0.0.0/0 at R2")
+    test_func = functools.partial(_bgp_default_route_is_valid, router)
+    success, result = topotest.run_and_expect(test_func, not None, count=30, wait=0.5)
+    assert result is not None, "0.0.0.0/0 exists at r2"
+
+    step("Announce 10.0.0.0/22 from R2")
+    router.vtysh_cmd("conf t\nrouter bgp\naddress-family ipv4\nredistribute connected")
+
+    step("Check if we have 0.0.0.0/0 at R2")
+    test_func = functools.partial(_bgp_default_route_is_valid, router)
+    success, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
+    assert result is None, "0.0.0.0/0 does not exist at r2"
+
+    step("Withdraw 10.0.0.0/22 from R2 again")
+    router.vtysh_cmd(
+        "conf t\nrouter bgp\naddress-family ipv4\nno redistribute connected"
+    )
+
+    step("Check if we don't have 0.0.0.0/0 at R2 again")
+    test_func = functools.partial(_bgp_default_route_is_valid, router)
+    success, result = topotest.run_and_expect(test_func, not None, count=30, wait=0.5)
+    assert result is not None, "0.0.0.0/0 exists at r2"
+
+
+if __name__ == "__main__":
+    args = ["-s"] + sys.argv[1:]
+    sys.exit(pytest.main(args))