def packet_in_handler(self, event):
"""Handle when a packet is received."""
LOGGER.info('New packet_in received.')
msg = event.msg
datapath = msg.datapath
dpid = dpid_to_str(datapath.id)
in_port = str(msg.match['in_port'])
packet = InceptionPacket(msg.data)
packet.serialize()
packet_data = packet.data.decode('Latin-1').encode('Latin-1')
pkt_digest = md5.new(packet_data).digest()
if self.zk_manager.is_master():
# master role
# First finish all unfinished packet_ins
self.zk_manager.process_pktin_cache()
try:
# Logging in zookeeper
pktin_log = i_util.tuple_to_str((dpid, in_port))
self.zk_manager.add_packetin_log(pktin_log, packet_data)
self.process_packet_in(dpid, in_port, packet)
# Enqueue packet so that other controllers
# can dump the corresponding packet
self.zk_manager.enqueue(pkt_digest)
# Delete log after task is finished
self.zk_manager.del_packetin_log(pktin_log)
except Exception:
LOGGER.warning("Unexpected exception in packet handler %s",
traceback.format_exc())
else:
# slave role
LOGGER.info('Cache packet_in message from (dpid=%s, in_port=%s)',
dpid, in_port)
self.zk_manager.add_pktin(pkt_digest, dpid, in_port, packet)
def packet_in_handler(self, event):
"""Handle when a packet is received."""
LOGGER.info('New packet_in received.')
msg = event.msg
datapath = msg.datapath
dpid = dpid_to_str(datapath.id)
in_port = str(msg.match['in_port'])
packet = InceptionPacket(msg.data)
packet.serialize()
packet_data = packet.data.decode('Latin-1').encode('Latin-1')
pkt_digest = md5.new(packet_data).digest()
if self.zk_manager.is_master():
# master role
# First finish all unfinished packet_ins
self.zk_manager.process_pktin_cache()
try:
# Logging in zookeeper
pktin_log = i_util.tuple_to_str((dpid, in_port))
self.zk_manager.add_packetin_log(pktin_log, packet_data)
self.process_packet_in(dpid, in_port, packet)
# Enqueue packet so that other controllers
# can dump the corresponding packet
self.zk_manager.enqueue(pkt_digest)
# Delete log after task is finished
self.zk_manager.del_packetin_log(pktin_log)
except Exception:
LOGGER.warning("Unexpected exception in packet handler %s",
traceback.format_exc())
else:
# slave role
LOGGER.info('Cache packet_in message from (dpid=%s, in_port=%s)',
dpid, in_port)
self.zk_manager.add_pktin(pkt_digest, dpid, in_port, packet)
def do_rpc(self, func_name, rpc_id, arguments):
LOGGER.info("RPC: %s", func_name)
znode = i_util.tuple_to_str((func_name, rpc_id))
self.zk_manager.add_rpc_log(znode, arguments)
txn = self.zk_manager.create_transaction()
func = getattr(self, func_name)
func(txn, *arguments)
self.zk_manager.del_rpc_log(znode, txn)