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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# Copyright (c) 2021, LabN Consulting, L.L.C.
# Copyright (c) 2019-2020 by
# Donatas Abraitis <donatas.abraitis@gmail.com>
#
"""
Test static route functionality
"""
import datetime
import ipaddress
import math
import os
import sys
import re
import pytest
from lib.topogen import TopoRouter, Topogen, get_topogen
from lib.topolog import logger
from lib.common_config import retry, step
pytestmark = [pytest.mark.staticd]
@pytest.fixture(scope="module")
def tgen(request):
"Setup/Teardown the environment and provide tgen argument to tests"
topodef = {"s1": ("r1",), "s2": ("r1",)}
tgen = Topogen(topodef, request.module.__name__)
tgen.start_topology()
router_list = tgen.routers()
for rname, router in router_list.items():
# Setup VRF red
router.net.add_l3vrf("red", 10)
router.net.add_loop("lo-red")
router.net.attach_iface_to_l3vrf("lo-red", "red")
router.net.attach_iface_to_l3vrf(rname + "-eth1", "red")
# and select daemons to run
router.load_config(TopoRouter.RD_ZEBRA, "zebra.conf")
router.load_config(TopoRouter.RD_MGMTD)
router.load_config(TopoRouter.RD_STATIC)
tgen.start_router()
yield tgen
tgen.stop_topology()
def get_ip_networks(super_prefix, count):
count_log2 = math.log(count, 2)
if count_log2 != int(count_log2):
count_log2 = int(count_log2) + 1
else:
count_log2 = int(count_log2)
network = ipaddress.ip_network(super_prefix)
return tuple(network.subnets(count_log2))[0:count]
def enable_debug(router):
router.vtysh_cmd("debug northbound callbacks configuration")
def disable_debug(router):
router.vtysh_cmd("no debug northbound callbacks configuration")
@retry(retry_timeout=30, initial_wait=0.1)
def check_kernel(r1, super_prefix, count, add, is_blackhole, vrf, matchvia):
network = ipaddress.ip_network(super_prefix)
vrfstr = f" vrf {vrf}" if vrf else ""
if network.version == 6:
kernel = r1.run(f"ip -6 route show{vrfstr}")
else:
kernel = r1.run(f"ip -4 route show{vrfstr}")
logger.debug("checking kernel routing table%s:\n%s", vrfstr, kernel)
for i, net in enumerate(get_ip_networks(super_prefix, count)):
if not add:
assert str(net) not in kernel
continue
if is_blackhole:
route = f"blackhole {str(net)} proto (static|196) metric 20"
else:
route = (
f"{str(net)}(?: nhid [0-9]+)? {matchvia} "
"proto (static|196) metric 20"
)
assert re.search(route, kernel), f"Failed to find \n'{route}'\n in \n'{kernel}'"
def do_config(
r1,
count,
add=True,
do_ipv6=False,
via=None,
vrf=None,
use_cli=False,
):
optype = "adding" if add else "removing"
iptype = "IPv6" if do_ipv6 else "IPv4"
#
# Set the route details
#
if vrf:
super_prefix = "2002::/48" if do_ipv6 else "20.0.0.0/8"
else:
super_prefix = "2001::/48" if do_ipv6 else "10.0.0.0/8"
matchtype = ""
matchvia = ""
if via == "blackhole":
pass
elif via:
matchvia = f"dev {via}"
else:
if vrf:
via = "2102::2" if do_ipv6 else "102.0.0.2"
matchvia = f"via {via} dev r1-eth1"
else:
via = "2101::2" if do_ipv6 else "101.0.0.2"
matchvia = f"via {via} dev r1-eth0"
vrfdbg = " in vrf {}".format(vrf) if vrf else ""
logger.debug("{} {} static {} routes{}".format(optype, count, iptype, vrfdbg))
#
# Generate config file in a retrievable place
#
config_file = os.path.join(
r1.logdir, r1.name, "{}-routes-{}.conf".format(iptype.lower(), optype)
)
with open(config_file, "w") as f:
if use_cli:
f.write("configure terminal\n")
if vrf:
f.write("vrf {}\n".format(vrf))
for i, net in enumerate(get_ip_networks(super_prefix, count)):
if add:
f.write("ip route {} {}\n".format(net, via))
else:
f.write("no ip route {} {}\n".format(net, via))
#
# Load config file.
#
if use_cli:
load_command = 'vtysh < "{}"'.format(config_file)
else:
load_command = 'vtysh -f "{}"'.format(config_file)
tstamp = datetime.datetime.now()
output = r1.cmd_raises(load_command)
delta = (datetime.datetime.now() - tstamp).total_seconds()
#
# Verify the results are in the kernel
#
check_kernel(r1, super_prefix, count, add, via == "blackhole", vrf, matchvia)
optyped = "added" if add else "removed"
logger.debug(
"{} {} {} static routes under {}{} in {}s".format(
optyped, count, iptype.lower(), super_prefix, vrfdbg, delta
)
)
def guts(tgen, vrf, use_cli):
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
r1 = tgen.routers()["r1"]
step("add via gateway", reset=True)
do_config(r1, 1, True, False, vrf=vrf, use_cli=use_cli)
step("remove via gateway")
do_config(r1, 1, False, False, vrf=vrf, use_cli=use_cli)
via = f"lo-{vrf}" if vrf else "lo"
step("add via loopback")
do_config(r1, 1, True, False, via=via, vrf=vrf, use_cli=use_cli)
step("remove via loopback")
do_config(r1, 1, False, False, via=via, vrf=vrf, use_cli=use_cli)
step("add via blackhole")
do_config(r1, 1, True, False, via="blackhole", vrf=vrf, use_cli=use_cli)
step("remove via blackhole")
do_config(r1, 1, False, False, via="blackhole", vrf=vrf, use_cli=use_cli)
def test_static_cli(tgen):
guts(tgen, "", True)
def test_static_file(tgen):
guts(tgen, "", False)
def test_static_vrf_cli(tgen):
guts(tgen, "red", True)
def test_static_vrf_file(tgen):
guts(tgen, "red", False)
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