class NeighborMonitor(Module):
'''
用于维护邻居信息和邻居可达的Switch与Controller信息。详见:
@HelloPacketHandler
@SwitchPacketHandler
TODO
1. 定时发送keepalive信息，检测邻居是否活着，若Down了产生NeighborControllerDown事件；
2. 若新Switch出现，产生SwitchUp事件；
3. 若Switch消失（即该Switch没有Controller可达），产生SwitchDown事件；
'''
PROVIDER = 'provider'
PEER = 'peer'
CUSTOMER = 'customer'
def __init__(self):
self._myself = None
self._relation_of_neighbor = {}
self._neighbors_with_relation = {}
def start(self):
for neighbor in self._relation_of_neighbor.keys():
core.routing.add_address(neighbor, neighbor.get_address())
from flex.neighbor_monitor.hello_packet_handler import HelloPacketHandler
self.hello = HelloPacketHandler(self._myself, self._relation_of_neighbor, self._neighbors_with_relation)
core.forwarding.register_handler(Packet.HELLO, self.hello)
core.event.register_handler(FlexUpEvent, self.hello)
def get_neighbor_relation(self, controller):
return self.hello.get_neighbor_relation(controller)
def get_neighbors(self):
return self.hello.get_neighbors()
def get_peers(self):
return self.hello.get_peers()
def get_providers(self):
return self.hello.get_providers()
def get_customers(self):
return self.hello.get_customers()
def start(self):
for neighbor in self._relation_of_neighbor.keys():
core.routing.add_address(neighbor, neighbor.get_address())
from flex.neighbor_monitor.hello_packet_handler import HelloPacketHandler
self.hello = HelloPacketHandler(self._myself, self._relation_of_neighbor, self._neighbors_with_relation)
core.forwarding.register_handler(Packet.HELLO, self.hello)
core.event.register_handler(FlexUpEvent, self.hello)
