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#
# Modified work Copyright (c) 2019 by VMware, Inc. ("VMware")
# Original work Copyright (c) 2018 by Network Device Education
# Foundation, Inc. ("NetDEF")
#
# 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 VMWARE DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL VMWARE 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.
#
from collections import OrderedDict
from json import dumps as json_dumps
import ipaddr
import pytest
# Import topogen and topotest helpers
from lib.topolog import logger
# Required to instantiate the topology builder class.
from lib.common_config import (
number_to_row, number_to_column,
load_config_to_router,
create_interfaces_cfg,
create_static_routes,
create_prefix_lists,
create_route_maps,
)
from lib.bgp import create_router_bgp
def build_topo_from_json(tgen, topo):
"""
Reads configuration from JSON file. Adds routers, creates interface
names dynamically and link routers as defined in JSON to create
topology. Assigns IPs dynamically to all interfaces of each router.
* `tgen`: Topogen object
* `topo`: json file data
"""
listRouters = []
for routerN in sorted(topo['routers'].iteritems()):
logger.info('Topo: Add router {}'.format(routerN[0]))
tgen.add_router(routerN[0])
listRouters.append(routerN[0])
listRouters.sort()
if 'ipv4base' in topo:
ipv4Next = ipaddr.IPv4Address(topo['link_ip_start']['ipv4'])
ipv4Step = 2 ** (32 - topo['link_ip_start']['v4mask'])
if topo['link_ip_start']['v4mask'] < 32:
ipv4Next += 1
if 'ipv6base' in topo:
ipv6Next = ipaddr.IPv6Address(topo['link_ip_start']['ipv6'])
ipv6Step = 2 ** (128 - topo['link_ip_start']['v6mask'])
if topo['link_ip_start']['v6mask'] < 127:
ipv6Next += 1
for router in listRouters:
topo['routers'][router]['nextIfname'] = 0
while listRouters != []:
curRouter = listRouters.pop(0)
# Physical Interfaces
if 'links' in topo['routers'][curRouter]:
def link_sort(x):
if x == 'lo':
return 0
elif 'link' in x:
return int(x.split('-link')[1])
else:
return int(x.split('r')[1])
for destRouterLink, data in sorted(topo['routers'][curRouter]['links']. \
iteritems(),
key=lambda x: link_sort(x[0])):
currRouter_lo_json = \
topo['routers'][curRouter]['links'][destRouterLink]
# Loopback interfaces
if 'type' in data and data['type'] == 'loopback':
if 'ipv4' in currRouter_lo_json and \
currRouter_lo_json['ipv4'] == 'auto':
currRouter_lo_json['ipv4'] = '{}{}.{}/{}'. \
format(topo['lo_prefix']['ipv4'], number_to_row(curRouter), \
number_to_column(curRouter), topo['lo_prefix']['v4mask'])
if 'ipv6' in currRouter_lo_json and \
currRouter_lo_json['ipv6'] == 'auto':
currRouter_lo_json['ipv6'] = '{}{}:{}/{}'. \
format(topo['lo_prefix']['ipv6'], number_to_row(curRouter), \
number_to_column(curRouter), topo['lo_prefix']['v6mask'])
if "-" in destRouterLink:
# Spliting and storing destRouterLink data in tempList
tempList = destRouterLink.split("-")
# destRouter
destRouter = tempList.pop(0)
# Current Router Link
tempList.insert(0, curRouter)
curRouterLink = "-".join(tempList)
else:
destRouter = destRouterLink
curRouterLink = curRouter
if destRouter in listRouters:
currRouter_link_json = \
topo['routers'][curRouter]['links'][destRouterLink]
destRouter_link_json = \
topo['routers'][destRouter]['links'][curRouterLink]
# Assigning name to interfaces
currRouter_link_json['interface'] = \
'{}-{}-eth{}'.format(curRouter, destRouter, topo['routers'] \
[curRouter]['nextIfname'])
destRouter_link_json['interface'] = \
'{}-{}-eth{}'.format(destRouter, curRouter, topo['routers'] \
[destRouter]['nextIfname'])
topo['routers'][curRouter]['nextIfname'] += 1
topo['routers'][destRouter]['nextIfname'] += 1
# Linking routers to each other as defined in JSON file
tgen.gears[curRouter].add_link(tgen.gears[destRouter],
topo['routers'][curRouter]['links'][destRouterLink] \
['interface'], topo['routers'][destRouter]['links'] \
[curRouterLink]['interface'])
# IPv4
if 'ipv4' in currRouter_link_json:
if currRouter_link_json['ipv4'] == 'auto':
currRouter_link_json['ipv4'] = \
'{}/{}'.format(ipv4Next, topo['link_ip_start'][ \
'v4mask'])
destRouter_link_json['ipv4'] = \
'{}/{}'.format(ipv4Next + 1, topo['link_ip_start'][ \
'v4mask'])
ipv4Next += ipv4Step
# IPv6
if 'ipv6' in currRouter_link_json:
if currRouter_link_json['ipv6'] == 'auto':
currRouter_link_json['ipv6'] = \
'{}/{}'.format(ipv6Next, topo['link_ip_start'][ \
'v6mask'])
destRouter_link_json['ipv6'] = \
'{}/{}'.format(ipv6Next + 1, topo['link_ip_start'][ \
'v6mask'])
ipv6Next = ipaddr.IPv6Address(int(ipv6Next) + ipv6Step)
logger.debug("Generated link data for router: %s\n%s", curRouter,
json_dumps(topo["routers"][curRouter]["links"],
indent=4, sort_keys=True))
def build_config_from_json(tgen, topo, save_bkup=True):
"""
Reads initial configuraiton from JSON for each router, builds
configuration and loads its to router.
* `tgen`: Topogen object
* `topo`: json file data
"""
func_dict = OrderedDict([
("links", create_interfaces_cfg),
("static_routes", create_static_routes),
("prefix_lists", create_prefix_lists),
("route_maps", create_route_maps),
("bgp", create_router_bgp)
])
data = topo["routers"]
for func_type in func_dict.keys():
logger.info('Building configuration for {}'.format(func_type))
func_dict.get(func_type)(tgen, data, build=True)
for router in sorted(topo['routers'].keys()):
logger.info('Configuring router {}...'.format(router))
result = load_config_to_router(tgen, router, save_bkup)
if not result:
logger.info("Failed while configuring {}".format(router))
pytest.exit(1)
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