def send_req(self):
if self.ryudp:
match = parser.OFPMatch()
self.req = parser.OFPFlowStatsRequest(self.ryudp, 0, ofp.OFPTT_ALL,
ofp.OFPP_ANY, ofp.OFPG_ANY,
0, 0, match)
self.ryudp.send_msg(self.req)
def _flow_stats_requester(self):
while True:
for dp in self.switchports.keys():
switch = self.switches[dp] #Getting datapath from dpid
cookie = cookie_mask = 0
match = parser13.OFPMatch()
msg = parser13.OFPFlowStatsRequest(switch, 0, of13.OFPTT_ALL,
of13.OFPP_ANY,
of13.OFPG_ANY, cookie,
cookie_mask, match)
switch.send_msg(msg)
hub.sleep(3) # Sleeping for three seconds
def _monitor(self):
"""
This is the monitoring thread which periodically
"""
# This function is used for a periodical start of the get statistics request
cookie = cookie_mask = 0
table_id = 2
req = ofparser.OFPFlowStatsRequest(self.datapath, 0, table_id,
ofp.OFPP_ANY, ofp.OFPG_ANY, cookie,
cookie_mask)
while True:
# Send request and wait for X seconds
self.datapath.send_msg(req)
hub.sleep(self.MONITORING_SLEEP_TIME)
def _monitor(self):
"""
This is the monitoring thread which periodically
"""
# This function is used for a periodical start of the get statistics request
cookie = cookie_mask = 0
table_id = 1
req = ofparser.OFPFlowStatsRequest(self.datapath, 0, table_id,
ofp.OFPP_ANY, ofp.OFPG_ANY, cookie,
cookie_mask)
while True:
# Send request and wait for X seconds
self.datapath.send_msg(req)
# Wait for a signal that the message was processed.
# For safety reason, set a timeout (in case something goes wrong with the other thread
self.learn_new_flows_event.wait(timeout=100 *
self.MONITORING_SLEEP_TIME)
# Wait for MONITORING_SLEEP_TIME before sending a new request
hub.sleep(self.MONITORING_SLEEP_TIME)
self.learn_new_flows_event.clear()
def _request_stats(self, datapath):
# Features request message
# The controller sends a feature request to the switch upon session establishment.
req = parser.OFPFlowStatsRequest(datapath)
datapath.send_msg(req)
def request_stats(self, datapath, cookie):
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
req = parser.OFPFlowStatsRequest(datapath, cookie=cookie)
datapath.send_msg(req)