def __init__(self, sock, msg, stats_reply=None, reply=None):
"""Initialize
@param sock reference to socket
@param msg message
"""
ofcomm.message.__init__(self, sock, msg)
##Stats reply header
self.stats_reply = stats_reply
remaining = reply
if (self.stats_reply == None) or (remaining == None):
self.stats_reply = pyof.ofp_stats_reply()
remaining = self.stats_reply.unpack(msg)
##Flow stats of individual flows
self.flows = []
while (len(remaining) >= pyof.OFP_FLOW_STATS_BYTES):
flow = pyof.ofp_flow_stats()
flow.unpack(remaining)
self.unpack_actions(remaining[pyof.OFP_FLOW_STATS_BYTES:flow.length], flow.actions)
remaining = remaining[flow.length:]
self.flows.append(flow)
if (len(remaining) > 0):
output.warn("Flow stats reply is of irregular length with "+\
str(len(remaining))+" bytes remaining.",
self.__class__.__name__)
output.vdbg("Received "+str(len(self.flows))+" flow stats.",
self.__class__.__name__)
def handle_stats_reply(self, event):
"""Handle stats reply
"""
stats_reply = pyof.ofp_stats_reply()
reply = stats_reply.unpack(event.message)
if (stats_reply.type == pyof.OFPST_FLOW):
self.scheduler.post_event(flow_stats(event.sock,
event.message,
stats_reply, reply))
