359 lines
11 KiB
Python
359 lines
11 KiB
Python
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#!/usr/bin/python
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# SPDX-License-Identifier: ISC
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#
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# Copyright (c) 2021 by VMware, Inc. ("VMware")
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# Used Copyright (c) 2018 by Network Device Education Foundation, Inc.
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# ("NetDEF") in this file.
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#
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"""OSPF Basic Functionality Automation."""
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import os
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import sys
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import time
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import pytest
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# Save the Current Working Directory to find configuration files.
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CWD = os.path.dirname(os.path.realpath(__file__))
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sys.path.append(os.path.join(CWD, "../"))
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# pylint: disable=C0413
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# Import topogen and topotest helpers
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from lib.topogen import Topogen, get_topogen
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# Import topoJson from lib, to create topology and initial configuration
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from lib.common_config import (
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start_topology,
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write_test_header,
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write_test_footer,
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reset_config_on_routers,
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step,
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create_interfaces_cfg,
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scapy_send_raw_packet,
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)
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from lib.topolog import logger
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from lib.topojson import build_config_from_json
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from lib.ospf import (
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verify_ospf_neighbor,
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clear_ospf,
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verify_ospf_gr_helper,
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create_router_ospf,
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)
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pytestmark = [pytest.mark.ospfd]
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# Global variables
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topo = None
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Iters = 5
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sw_name = None
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intf = None
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intf1 = None
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pkt = None
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"""
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Topology:
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Please view in a fixed-width font such as Courier.
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Topo : Broadcast Networks
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DUT - HR RR
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+---+ +---+ +---+ +---+
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|R0 + +R1 + +R2 + +R3 |
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+-+-+ +-+-+ +-+-+ +-+-+
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--+-----------+--------------+---------------+-----
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Ethernet Segment
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Testcases:
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TC1. Verify by default helper support is disabled for FRR ospf
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TC2. OSPF GR on Broadcast : Verify DUT enters Helper mode when neighbor
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sends grace lsa, helps RR to restart gracefully (RR = DR)
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TC3. OSPF GR on Broadcast : Verify DUT enters Helper mode when neighbor
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sends grace lsa, helps RR to restart gracefully (RR = BDR)
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TC4. OSPF GR on Broadcast : Verify DUT enters Helper mode when neighbor
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sends grace lsa, helps RR to restart gracefully (RR = DRother)
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TC5. OSPF GR on P2P : Verify DUT enters Helper mode when neighbor sends
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grace lsa, helps RR to restart gracefully.
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TC6. Verify all the show commands newly introducted as part of ospf
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helper support - Json Key verification wrt to show commands.
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TC7. Verify helper when grace lsa is received with different configured
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value in process level (higher, lower, grace lsa timer above 1800)
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TC8. Verify helper functionality when dut is helping RR and new grace lsa
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is received from RR.
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"""
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def setup_module(mod):
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"""
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Sets up the pytest environment
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* `mod`: module name
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"""
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global topo, intf, intf1, sw_name, pkt
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testsuite_run_time = time.asctime(time.localtime(time.time()))
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logger.info("Testsuite start time: {}".format(testsuite_run_time))
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logger.info("=" * 40)
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logger.info("Running setup_module to create topology")
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# This function initiates the topology build with Topogen...
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json_file = "{}/ospf_gr_helper.json".format(CWD)
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tgen = Topogen(json_file, mod.__name__)
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global topo
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topo = tgen.json_topo
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# ... and here it calls Mininet initialization functions.
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# Starting topology, create tmp files which are loaded to routers
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# to start daemons and then start routers
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start_topology(tgen)
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# Creating configuration from JSON
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build_config_from_json(tgen, topo)
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# Don't run this test if we have any failure.
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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ospf_covergence = verify_ospf_neighbor(tgen, topo, lan=True)
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assert ospf_covergence is True, "setup_module :Failed \n Error: {}".format(
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ospf_covergence
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)
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sw_name = "s1"
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intf = topo["routers"]["r0"]["links"][sw_name]["interface"]
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intf1 = topo["routers"]["r1"]["links"][sw_name]["interface"]
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pkt = topo["routers"]["r1"]["opq_lsa_hex"]
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logger.info("Running setup_module() done")
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def teardown_module():
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"""Teardown the pytest environment"""
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logger.info("Running teardown_module to delete topology")
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tgen = get_topogen()
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try:
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# Stop toplogy and Remove tmp files
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tgen.stop_topology()
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except OSError:
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# OSError exception is raised when mininet tries to stop switch
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# though switch is stopped once but mininet tries to stop same
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# switch again, where it ended up with exception
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pass
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def delete_ospf():
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"""delete ospf process after each test"""
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tgen = get_topogen()
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step("Delete ospf process")
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for rtr in topo["routers"]:
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ospf_del = {rtr: {"ospf": {"delete": True}}}
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result = create_router_ospf(tgen, topo, ospf_del)
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assert result is True, "Testcase: Failed \n Error: {}".format(result)
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# ##################################
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# Test cases start here.
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# ##################################
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def test_ospf_gr_helper_tc3_p1(request):
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"""
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OSPF GR on Broadcast : Verify DUT enters Helper mode when neighbor
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sends grace lsa, helps RR to restart gracefully (RR = BDR)
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"""
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tc_name = request.node.name
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write_test_header(tc_name)
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tgen = get_topogen()
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# Don't run this test if we have any failure.
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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global topo, intf, intf1, pkt
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step("Bring up the base config as per the topology")
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step(
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"Configure DR priority as 99 in RR , DUT dr priority = 98 "
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"& reset ospf process in all the routers"
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)
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reset_config_on_routers(tgen)
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ospf_covergence = verify_ospf_neighbor(tgen, topo, lan=True)
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assert (
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ospf_covergence is True
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), "OSPF is not after reset config \n Error: {}".format(ospf_covergence)
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step(
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"Configure DR priority 100 on R0 and clear ospf neighbors "
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"on all the routers."
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)
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input_dict = {
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"r0": {
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"links": {
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sw_name: {
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"interface": topo["routers"]["r0"]["links"][sw_name]["interface"],
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"ospf": {"priority": 100},
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}
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}
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}
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}
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result = create_interfaces_cfg(tgen, input_dict)
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assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)
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step("Clear ospf neighbours in all routers")
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for rtr in topo["routers"]:
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clear_ospf(tgen, rtr)
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step("Verify that DR election is triggered and R0 is elected as DR")
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input_dict = {
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"r0": {
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"ospf": {
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"neighbors": {
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"r1": {"nbrState": "Full", "role": "Backup"},
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"r2": {"nbrState": "Full", "role": "DROther"},
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"r3": {"nbrState": "Full", "role": "DROther"},
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}
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}
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}
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}
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dut = "r0"
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result = verify_ospf_neighbor(tgen, topo, dut, input_dict, lan=True)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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ospf_gr_r0 = {
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"r0": {"ospf": {"graceful-restart": {"helper enable": [], "opaque": True}}}
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}
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result = create_router_ospf(tgen, topo, ospf_gr_r0)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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ospf_gr_r1 = {
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"r1": {"ospf": {"graceful-restart": {"helper enable": [], "opaque": True}}}
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}
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result = create_router_ospf(tgen, topo, ospf_gr_r1)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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step("Verify that DUT enters into helper mode.")
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input_dict = {"activeRestarterCnt": 1}
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gracelsa_sent = False
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repeat = 0
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dut = "r0"
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while not gracelsa_sent and repeat < Iters:
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gracelsa_sent = scapy_send_raw_packet(tgen, topo, "r1", intf1, pkt)
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result = verify_ospf_gr_helper(tgen, topo, dut, input_dict)
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if isinstance(result, str):
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repeat += 1
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gracelsa_sent = False
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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delete_ospf()
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write_test_footer(tc_name)
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def test_ospf_gr_helper_tc4_p1(request):
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"""
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OSPF GR on Broadcast : Verify DUT enters Helper mode when neighbor
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sends grace lsa, helps RR to restart gracefully (RR = DRother)
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"""
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tc_name = request.node.name
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write_test_header(tc_name)
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tgen = get_topogen()
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# Don't run this test if we have any failure.
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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global topo, intf, intf1, pkt
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step("Bring up the base config as per the topology")
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step(
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"Configure DR priority as 99 in RR , DUT dr priority = 98 "
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"& reset ospf process in all the routers"
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)
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reset_config_on_routers(tgen)
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ospf_covergence = verify_ospf_neighbor(tgen, topo, lan=True)
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assert (
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ospf_covergence is True
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), "OSPF is not after reset config \n Error: {}".format(ospf_covergence)
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step("Configure DR priority 0 on R0 and clear ospf neighbors on all the routers.")
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input_dict = {
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"r0": {
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"links": {
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sw_name: {
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"interface": topo["routers"]["r0"]["links"][sw_name]["interface"],
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"ospf": {"priority": 0},
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}
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}
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}
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}
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result = create_interfaces_cfg(tgen, input_dict)
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assert result is True, "Testcase {} :Failed \n Error: {}".format(tc_name, result)
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step("Clear ospf neighbours in all routers")
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for rtr in topo["routers"]:
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clear_ospf(tgen, rtr)
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step("Verify that DR election is triggered and R0 is elected as 2-Way")
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input_dict = {
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"r0": {
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"ospf": {
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"neighbors": {
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"r1": {"nbrState": "Full", "role": "DR"},
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"r2": {"nbrState": "2-Way", "role": "DROther"},
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"r3": {"nbrState": "2-Way", "role": "DROther"},
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}
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}
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}
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}
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dut = "r0"
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result = verify_ospf_neighbor(tgen, topo, dut, input_dict, lan=True)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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ospf_gr_r0 = {
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"r0": {"ospf": {"graceful-restart": {"helper enable": [], "opaque": True}}}
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}
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result = create_router_ospf(tgen, topo, ospf_gr_r0)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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ospf_gr_r1 = {
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"r1": {"ospf": {"graceful-restart": {"helper enable": [], "opaque": True}}}
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}
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result = create_router_ospf(tgen, topo, ospf_gr_r1)
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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step("Verify that DUT enters into helper mode.")
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input_dict = {"activeRestarterCnt": 1}
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gracelsa_sent = False
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repeat = 0
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dut = "r0"
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while not gracelsa_sent and repeat < Iters:
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gracelsa_sent = scapy_send_raw_packet(tgen, topo, "r1", intf1, pkt)
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result = verify_ospf_gr_helper(tgen, topo, dut, input_dict)
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if isinstance(result, str):
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repeat += 1
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gracelsa_sent = False
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assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
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delete_ospf()
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write_test_footer(tc_name)
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if __name__ == "__main__":
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args = ["-s"] + sys.argv[1:]
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sys.exit(pytest.main(args))
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