def start(self):
self.logger.debug("Start ExaBGP Interface")
self.server.start()
start_time = time.clock()
self.run = True
while self.run:
# get BGP messages from ExaBGP via stdin
try:
route = self.server.receiver_queue.get(True, 1)
if route == "DONE":
print str(time.clock() - start_time
) + ' finished with initial RIB construction'
else:
self.logger.debug("Received Route")
route = json.loads(route)
# process route advertisements - add/remove routes to/from rib of respective participant (neighbor)
if 'neighbor' in route:
if 'ip' in route['neighbor']:
in_participant = self.config.portip_2_participant[
route['neighbor']['ip']]
updates = self.rib.update(in_participant, route)
# update local ribs - select best route for each prefix
for update in updates:
affected_participants = self.config.participants[
in_participant].peers_in
decision_process(self.rib,
affected_participants,
self.config.participants,
update)
event = XCTRLEvent("RouteServer", "RIB UPDATE",
updates)
self.event_queue.put(event)
elif 'notification' in route:
for participant in self.config.participants:
self.rib.process_notification(participant, route)
except Queue.Empty:
# self.logger.debug("Empty Queue")
pass
def start(self):
print "Start Server"
self.xrs.server.start()
while self.run:
# get BGP messages from ExaBGP via stdin
try:
route = self.xrs.server.receiver_queue.get(True, 1)
route = json.loads(route)
# process route advertisements - add/remove routes to/from rib of respective participant (neighbor)
updates = None
if ('neighbor' in route):
if ('ip' in route['neighbor']):
updates = self.xrs.participants[
self.xrs.portip_2_participant[
route['neighbor']['ip']]].update(route)
elif ('notification' in route):
for participant in self.xrs.participants:
self.xrs.participants[
participant].process_notification(route)
if updates is not None:
# update local ribs - select best route for each prefix
for update in updates:
decision_process(self.xrs.participants, update)
# assign VNHs
vnh_assignment(updates, self.xrs)
# update supersets
sdx_msgs = update_supersets(updates, self.xrs)
# send supersets to SDX controller
update_sdx_controller(sdx_msgs, self.xrs.rest_api_url)
# BGP updates
changes = bgp_update_peers(updates, self.xrs)
# Send Gratuitous ARPs
if changes:
for change in changes:
self.sdx_ap.send_gratuitous_arp(change)
except Queue.Empty:
if LOG:
print "Empty Queue"
def start(self):
print "Start Server"
self.xrs.server.start()
while self.run:
# get BGP messages from ExaBGP via stdin
try:
route = self.xrs.server.receiver_queue.get(True, 1)
route = json.loads(route)
# process route advertisements - add/remove routes to/from rib of respective participant (neighbor)
updates = None
if ('neighbor' in route):
if ('ip' in route['neighbor']):
updates = self.xrs.participants[self.xrs.portip_2_participant[route['neighbor']['ip']]].update(route)
elif ('notification' in route):
for participant in self.xrs.participants:
self.xrs.participants[participant].process_notification(route)
if updates is not None:
# update local ribs - select best route for each prefix
for update in updates:
decision_process(self.xrs.participants,update)
# assign VNHs
vnh_assignment(updates, self.xrs)
# update supersets
sdx_msgs = update_supersets(updates, self.xrs)
# send supersets to SDX controller
update_sdx_controller(sdx_msgs, self.xrs.rest_api_url)
# BGP updates
changes = bgp_update_peers(updates, self.xrs)
# Send Gratuitous ARPs
if changes:
for change in changes:
self.sdx_ap.send_gratuitous_arp(change)
except Queue.Empty:
if LOG:
print "Empty Queue"
def start(self):
self.server.start()
while True:
route = self.server.receiver_queue.get()
route = json.loads(route)
# TODO: check the RIB update flow with others ...
# At the moment, I am updating the RIB and will attach next-hop to the announcement at the end
updates = []
route_list = None
# Update RIBs
for participant_name in self.sdx.participants:
route_list = self.sdx.participants[
participant_name].rs_client.update(route)
if route_list:
break
# Best Path Selection algorithm
for route_item in route_list:
updates.extend(
decision_process(self.sdx.participants, route_item))
# Check for withdraw routes
for route in route_list:
if (route is None):
continue
elif 'withdraw' in route:
for VNH in self.sdx.VNH_2_pfx:
if (route['withdraw']['prefix']
in list(self.sdx.VNH_2_pfx[VNH])):
self.server.sender_queue.put(
withdraw_route(route['withdraw'],
self.sdx.VNH_2_IP[VNH]))
break
# Trigger policy updates
bgp_trigger_update(self.event_queue, self.ready_queue)
# Check for announced routes
#if (route_list):
# TODO: need to correct this glue logic
if hasattr(self.sdx, 'VNH_2_pfx'):
for VNH in self.sdx.VNH_2_pfx:
for prefix in list(self.sdx.VNH_2_pfx[VNH]):
for paticipant_name in self.sdx.participants:
route = self.sdx.participants[
paticipant_name].rs_client.get_route(
'local', prefix)
if route:
self.server.sender_queue.put(
announce_route(route,
self.sdx.VNH_2_IP[VNH]))
break
def start(self):
self.server.start()
while True:
route = self.server.receiver_queue.get()
route = json.loads(route)
# TODO: check the RIB update flow with others ...
# At the moment, I am updating the RIB and will attach next-hop to the announcement at the end
updates = []
route_list = None
# Update RIBs
for participant_name in self.sdx.participants:
route_list = self.sdx.participants[participant_name].rs_client.update(route)
if route_list:
break
# Best Path Selection algorithm
for route_item in route_list:
updates.extend(decision_process(self.sdx.participants,route_item))
# Check for withdraw routes
for route in route_list:
if (route is None):
continue
elif 'withdraw' in route:
for VNH in self.sdx.VNH_2_pfx:
if(route['withdraw']['prefix'] in list(self.sdx.VNH_2_pfx[VNH])):
self.server.sender_queue.put(withdraw_route(route['withdraw'],self.sdx.VNH_2_IP[VNH]))
break
# Trigger policy updates
bgp_trigger_update(self.event_queue,self.ready_queue)
# Check for announced routes
#if (route_list):
# TODO: need to correct this glue logic
if hasattr(self.sdx, 'VNH_2_pfx'):
for VNH in self.sdx.VNH_2_pfx:
for prefix in list(self.sdx.VNH_2_pfx[VNH]):
for paticipant_name in self.sdx.participants:
route = self.sdx.participants[paticipant_name].rs_client.get_route('local',prefix)
if route:
self.server.sender_queue.put(announce_route(route,self.sdx.VNH_2_IP[VNH]))
break
def update(self,route):
origin = None
as_path = None
med = None
atomic_aggregate = None
if ('neighbor' in route):
if ('ip' in route['neighbor']):
# Only add to the RIB if it's from a participant who other than myself.
if (route['neighbor']['ip'] not in self.ips):
if ('update' in route['neighbor']):
if ('attribute' in route['neighbor']['update']):
attribute = route['neighbor']['update']['attribute']
origin = attribute['origin']
as_path = attribute['as-path']
med = attribute['med']
atomic_aggregate = attribute['atomic-aggregate']
if ('announce' in route['neighbor']['update']):
announce = route['neighbor']['update']['announce']
if ('ipv4 unicast' in announce):
for prefix in announce['ipv4 unicast'].keys():
self.rib["input"][prefix] = (announce['ipv4 unicast'][prefix]['next-hop'],
origin,
' '.join(map(str,as_path)).replace('[','').replace(']',''),
med,
atomic_aggregate)
self.rib["input"].commit()
best_route = decision_process(self.rib["input"],prefix)
if (best_route is not None):
self.rib["local"].delete(prefix)
self.rib["local"][prefix] = best_route
self.rib["local"].commit()
#queue.put(self.announce_route(best_route))
return {'announce':best_route}
elif ('withdraw' in route['neighbor']['update']):
withdraw = route['neighbor']['update']['withdraw']
if ('ipv4 unicast' in withdraw):
for prefix in withdraw['ipv4 unicast'].keys():
deleted_route = self.rib["input"][prefix]
self.rib["input"].delete(prefix)
self.rib["input"].commit()
self.rib["local"].delete(prefix)
self.rib["local"].commit()
#queue.put(self.withdraw_route(deleted_route))
# TODO: clarify how the route withdrawal will work i.e., do we have to run the decision process again
return {'withdraw':deleted_route}
elif ('notification' in route):
return
if ('shutdown' == route['notification']):
self.rib["input"].delete_all()
self.rib["input"].commit()
self.rib["local"].delete_all()
self.rib["local"].commit()
# TODO: send shutdown notification to participants
return