def _timer_func():
""" handler for timer function that sends the requests to all the
switches connected to the controller.
"""
log.debug("start check stat")
for connection in core.openflow._connections.values():
# FlowStatsReceived
connection.send(
of.ofp_stats_request(body=of.ofp_flow_stats_request(), type=of.ofp_stats_types_rev_map.get("OFPST_FLOW"))
)
# AggregateFlowStatsReceived
connection.send(
of.ofp_stats_request(
body=of.ofp_aggregate_stats_request(), type=of.ofp_stats_types_rev_map.get("OFPST_AGGREGATE")
)
)
# TableStatsReceived
# I don't know which methode to call (it's not of.ofp_flow_stats())
# connection.send(of.ofp_stats_request(body=of.ofp_table_stats()))
# PortStatsReceived
connection.send(
of.ofp_stats_request(
body=of.ofp_port_stats_request(port_no=of.OFPP_NONE), type=of.ofp_stats_types_rev_map.get("OFPST_PORT")
)
)
# QueueStatsReceived
body = of.ofp_queue_stats_request(port_no=of.OFPP_NONE, queue_id=of.OFPQ_ALL)
connection.send(of.ofp_stats_request(body=body, type=of.ofp_stats_types_rev_map.get("OFPST_QUEUE")))
def act_like_switch (self, packet, packet_in):
"""
Implement switch-like behavior.
"""
srcaddr = EthAddr(packet.src)
if not self.mac_to_port.has_key(srcaddr):
self.mac_to_port[srcaddr] = packet_in.in_port
for key, value in dict.items(self.mac_to_port):
print key, value
dstaddr = EthAddr(packet.dst)
#if my_match.dl_dst in mac_t _port:
if dstaddr in self.mac_to_port:
# Send packet out the associated port
out_port = self.mac_to_port[dstaddr]
match = of.ofp_match()
msg = of.ofp_flow_mod() #creates a flow table entry in switc
#msg.match.dl_src = srcaddr
#msg.match.dl_dst = dstaddr
msg.match.tp_dst = out_port
for con in core.openflow.connections:
msg2 = of.ofp_queue_stats_request()
msg2.port_no = out_port
msg2.queue_id = of.OFPQ_ALL
con.send(of.ofp_stats_request(body=msg2))
# Add an action to send to the specified port
action = of.ofp_action_output(port = of.OFPP_CONTROLLER)
msg.actions.append(action)
queue_action = of.ofp_action_enqueue()
queue_action.port = out_port
queue_action.queue_id = 1
msg.actions.append(queue_action)
print "printing q stats in act like switch\n"
#global stats1
#print ("%s",s.stats)
for f in s.stats:
print f
print "\n"
# Send message to switch
self.connection.send(msg)
self.resend_packet(packet_in,out_port)
else:
# Flood the packet out everything but the input port
# This part looks familiar, right?
self.resend_packet (packet_in,of.OFPP_FLOOD)
print "------flood-------"
def _timer_func (self):
"""
Recurring function to request stats from switches
for each connection (which represents a switch actually)
request statistics
"""
for connection in core.openflow._connections.values():
# connection.send(of.ofp_stats_request(body=of.ofp_flow_stats_request()))
connection.send(of.ofp_stats_request(body=of.ofp_port_stats_request()))
connection.send(of.ofp_stats_request(body=of.ofp_queue_stats_request()))
def get_switch_queues(switch_dpid):
"""
Returns per switch a list of all queue stats. This includes:
- Queue ID
- Port number
- Transmitted bytes
- Transmitted packets
- Transmitted packets with error
:param switch_dpid: Switch DPID to request in format XX:XX:XX:XX:XX:XX:XX:XX
:type switch_dpid: str
:return: List of all queue stats from the requested switch
:rtype: JSONArray
:except BaseException: If any error occurs returns an empty list
"""
try:
# build openflow message
bodyMsg = of.ofp_queue_stats_request()
bodyMsg.port_no = of.OFPP_ALL
bodyMsg.queue_id = of.OFPQ_ALL
msg = of.ofp_stats_request(body=bodyMsg)
msg.type = of.OFPST_QUEUE
# get and verify stats
dataArray = []
stats = get_switch_stats(switch_dpid, msg, "queues")
if stats == None:
log.error("Error getting queue stats")
return json.dumps(dataArray)
# build and return json data
for queueStats in stats:
data = {
"id": queueStats.queue_id,
"portNumber": queueStats.port_no,
"txBytes": queueStats.tx_bytes,
"txPackets": queueStats.tx_packets,
"txErrors": queueStats.tx_errors
}
dataArray.append(data)
return json.dumps(dataArray)
except BaseException, e:
log.error(e.message)
dataArray = []
return json.dumps(dataArray)
