def of_demo_29():
f = "cfg.yml"
d = {}
if (load_dict_from_file(f, d) is False):
print("Config file '%s' read error: " % f)
exit()
try:
ctrlIpAddr = d['ctrlIpAddr']
ctrlPortNum = d['ctrlPortNum']
ctrlUname = d['ctrlUname']
ctrlPswd = d['ctrlPswd']
rundelay = d['rundelay']
except:
print("Failed to get Controller device attributes")
exit(0)
description = (
"<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n"
" This demo illustrates how to use Controller's notification \n"
" subscription service for tracing dynamic changes in the\n"
" network topology data tree maintained by the Controller.\n"
"\n"
" It is implied that core network services (Forwarding Rules\n"
" Manager, Topology Manager, Switch Manager, Host Tracker)\n"
" are functioning on the Controller\n"
"\n"
" This script creates an event listener on the Controller and\n"
" establishes permanent connection to the events notification\n"
" stream. Once a data change event in the topology tree (such\n"
" as add/remove switch, host or link) is detected it will be\n"
" reported to the screen.\n"
"<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n")
print "\n".strip()
print description
print "\n".strip()
time.sleep(rundelay)
print("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<")
print("<<< Demo 29 Start")
print("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<")
ctrl = Controller(ctrlIpAddr, ctrlPortNum, ctrlUname, ctrlPswd)
# Identifier of the network topology to be traced
# (name used by Controller for default topology instance)
topo_id = 'flow:1'
print "\n".strip()
print("<<< 'Controller': %s, Topology Identifier: '%s'" %
(ctrlIpAddr, topo_id))
time.sleep(rundelay)
# Data store for the changes
# Can be one of:
# - CONFIGURATION: Logical data store representing configuration
# state of the system and it's components.
# - OPERATIONAL: Logical data store representing operational
# state of the system and it's components
datastore = "OPERATIONAL"
# Scope of the data changes
# Can be one of:
# - BASE: Represents only a direct change of the node, such as
# replacement, addition or deletion of the node.
# - ONE: Represent a change (addition, replacement, deletion)
# of the node or one of its direct children.
# This scope is a superset of BASE.
# - SUBTREE: Represents a change of the node or any of its child
# nodes, direct and nested.
# This scope is superset of ONE and BASE.
scope = "SUBTREE"
# Path to the network topology node in the YANG data tree
path = ctrl.get_network_topology_yang_schema_path(topo_id)
# Create listener on the Controller (if it does already exist Controller
# just returns the stream name to subscribe to)
result = ctrl.create_data_change_event_subscription(datastore, scope, path)
status = result.get_status()
if not status.eq(STATUS.OK):
print("\n")
print("!!!Demo terminated, reason: %s" % status.detailed())
exit(1)
stream_name = result.get_data()
# Subscribe to the stream
result = ctrl.subscribe_to_stream(stream_name)
status = result.get_status()
if not status.eq(STATUS.OK):
print("\n")
print("!!!Demo terminated, reason: %s" % status.detailed())
exit(1)
print "\n".strip()
print " Successfully subscribed for data change notifications"
print " Stream location:"
stream_location = result.get_data()
print " %s" % stream_location
print "\n".strip()
print " Listening ... (CTRL-C to exit)"
print "\n".strip()
# Connect to the notification stream on the Controller
# and start listening for the data change notifications
# (report only events that we are really interested in)
websock = create_connection(stream_location)
try:
while True:
event = websock.recv()
tcn = NetworkTopologyChangeNotification(event)
timestamp = tcn.get_time()
l = tcn.switches_added()
if l and len(l):
for i in l:
print " [%s] added switch: %s" % (timestamp, i)
l = tcn.switches_removed()
if l and len(l):
for i in l:
print " [%s] removed switch: %s" % (timestamp, i)
l = tcn.hosts_added()
if l and len(l):
for i in l:
print " [%s] added host: %s" % (timestamp, i)
l = tcn.hosts_removed()
if l and len(l):
for i in l:
print " [%s] removed host: %s" % (timestamp, i)
l = tcn.links_added()
if l and len(l):
for i in l:
print " [%s] added link: %s" % (timestamp, i)
l = tcn.links_removed()
if l and len(l):
for i in l:
print " [%s] removed link: %s" % (timestamp, i)
except (KeyboardInterrupt):
print "Interrupted from keyboard, exit\n"
websock.close()
print("\n")
print(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
print(">>> Demo End")
print(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
def of_demo_29():
f = "cfg.yml"
d = {}
if(load_dict_from_file(f, d) is False):
print("Config file '%s' read error: " % f)
exit()
try:
ctrlIpAddr = d['ctrlIpAddr']
ctrlPortNum = d['ctrlPortNum']
ctrlUname = d['ctrlUname']
ctrlPswd = d['ctrlPswd']
rundelay = d['rundelay']
except:
print ("Failed to get Controller device attributes")
exit(0)
description = (
"<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n"
" This demo illustrates how to use Controller's notification \n"
" subscription service for tracing dynamic changes in the\n"
" network topology data tree maintained by the Controller.\n"
"\n"
" It is implied that core network services (Forwarding Rules\n"
" Manager, Topology Manager, Switch Manager, Host Tracker)\n"
" are functioning on the Controller\n"
"\n"
" This script creates an event listener on the Controller and\n"
" establishes permanent connection to the events notification\n"
" stream. Once a data change event in the topology tree (such\n"
" as add/remove switch, host or link) is detected it will be\n"
" reported to the screen.\n"
"<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n"
)
print "\n".strip()
print description
print "\n".strip()
time.sleep(rundelay)
print ("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<")
print ("<<< Demo 29 Start")
print ("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<")
ctrl = Controller(ctrlIpAddr, ctrlPortNum, ctrlUname, ctrlPswd)
# Identifier of the network topology to be traced
# (name used by Controller for default topology instance)
topo_id = 'flow:1'
print "\n".strip()
print ("<<< 'Controller': %s, Topology Identifier: '%s'"
% (ctrlIpAddr, topo_id))
time.sleep(rundelay)
# Data store for the changes
# Can be one of:
# - CONFIGURATION: Logical data store representing configuration
# state of the system and it's components.
# - OPERATIONAL: Logical data store representing operational
# state of the system and it's components
datastore = "OPERATIONAL"
# Scope of the data changes
# Can be one of:
# - BASE: Represents only a direct change of the node, such as
# replacement, addition or deletion of the node.
# - ONE: Represent a change (addition, replacement, deletion)
# of the node or one of its direct children.
# This scope is a superset of BASE.
# - SUBTREE: Represents a change of the node or any of its child
# nodes, direct and nested.
# This scope is superset of ONE and BASE.
scope = "SUBTREE"
# Path to the network topology node in the YANG data tree
path = ctrl.get_network_topology_yang_schema_path(topo_id)
# Create listener on the Controller (if it does already exist Controller
# just returns the stream name to subscribe to)
print path
result = ctrl.create_data_change_event_subscription(datastore, scope, path)
status = result.get_status()
if not status.eq(STATUS.OK):
print ("\n")
print ("!!!Demo terminated, reason: %s" % status.detailed())
exit(1)
print "Here1"
stream_name = result.get_data()
print "here2"
# Subscribe to the stream
result = ctrl.subscribe_to_stream(stream_name)
print "here 3"
status = result.get_status()
if not status.eq(STATUS.OK):
print ("\n")
print ("!!!Demo terminated, reason: %s" % status.detailed())
exit(1)
print "\n".strip()
print " Successfully subscribed for data change notifications"
print " Stream location:"
stream_location = result.get_data()
print " %s" % stream_location
print "\n".strip()
print " Listening ... (CTRL-C to exit)"
print "\n".strip()
# Connect to the notification stream on the Controller
# and start listening for the data change notifications
# (report only events that we are really interested in)
websock = create_connection(stream_location)
try:
while True:
event = websock.recv()
tcn = NetworkTopologyChangeNotification(event)
timestamp = tcn.get_time()
l = tcn.switches_added()
if l and len(l):
for i in l:
print " [%s] added switch: %s" % (timestamp, i)
l = tcn.switches_removed()
if l and len(l):
for i in l:
print " [%s] removed switch: %s" % (timestamp, i)
l = tcn.hosts_added()
if l and len(l):
for i in l:
print " [%s] added host: %s" % (timestamp, i)
l = tcn.hosts_removed()
if l and len(l):
for i in l:
print " [%s] removed host: %s" % (timestamp, i)
l = tcn.links_added()
if l and len(l):
for i in l:
print " [%s] added link: %s" % (timestamp, i)
l = tcn.links_removed()
if l and len(l):
for i in l:
print " [%s] removed link: %s" % (timestamp, i)
except(KeyboardInterrupt) as e:
print "Interrupted from keyboard, exit\n"
websock.close()
print ("\n")
print (">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
print (">>> Demo End")
print (">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
print " Successfully subscribed for data change notifications"
print " Stream location:"
stream_location = result.get_data()
print " %s" % stream_location
print "\n".strip()
print " Listening ... (CTRL-C to exit)"
print "\n".strip()
# Connect to the notification stream on the Controller
# and start listening for the data change notifications
# (report only events that we are really interested in)
websock = create_connection(stream_location)
try:
while True:
event = websock.recv()
tcn = NetworkTopologyChangeNotification(event)
timestamp = tcn.get_time()
l = tcn.switches_added()
if l and len(l):
for i in l:
print " [%s] added switch: %s" % (timestamp, i)
l = tcn.switches_removed()
if l and len(l):
for i in l:
print " [%s] removed switch: %s" % (timestamp, i)
l = tcn.hosts_added()
if l and len(l):
