def send_stats_request_handler(Type, flow_1, port=None):
flow = str(flow_1)
ofp_flow_wildcards = of.ofp_flow_wildcards(flow[8:12])
ofp_match = of.ofp_match(flow[12:48])
ofp_flow_mod = of.ofp_flow_mod(flow[48:72])
if len(flow) >= 88:
action_header = of.ofp_action_header(flow[72:80])
action_output = of.ofp_action_output(flow[80:88])
#we need to send the stats request packets periodically
msg = {
0:
of.ofp_header(type=16, length=12) /
of.ofp_stats_request(type=0), #Type of OFPST_DESC (0)
1:
of.ofp_header(type=16, length=56) / of.ofp_stats_request(type=1) /
ofp_flow_wildcards / ofp_match /
of.ofp_flow_stats_request(out_port=ofp_flow_mod.out_port), #flow stats
2:
of.ofp_header(type=16, length=56) / of.ofp_stats_request(type=2) /
ofp_flow_wildcards / ofp_match /
of.ofp_aggregate_stats_request(), # aggregate stats request
3:
of.ofp_header(type=16, length=12) /
of.ofp_stats_request(type=3), #Type of OFPST_TABLE (0)
4:
of.ofp_header(type=16, length=20) / of.ofp_stats_request(type=4) /
of.ofp_port_stats_request(port_no=port), # port stats request
5:
of.ofp_header(type=16, length=20) / of.ofp_stats_request(type=5) /
of.ofp_queue_stats_request(), #queue request
6:
of.ofp_header(type=16, length=12) /
of.ofp_stats_request(type=0xffff) #vendor request
}
return msg[Type]
def send_stats_request_handler(Type, flow_1, port =None):
flow =str(flow_1)
ofp_flow_wildcards=of.ofp_flow_wildcards(flow[8:12])
ofp_match =of.ofp_match(flow[12:48])
ofp_flow_mod =of.ofp_flow_mod(flow[48:72])
if len(flow)>=88:
action_header = of.ofp_action_header(flow[72:80])
action_output = of.ofp_action_output(flow[80:88])
#we need to send the stats request packets periodically
msg = { 0: of.ofp_header(type = 16, length = 12)/of.ofp_stats_request(type = 0), #Type of OFPST_DESC (0)
1: of.ofp_header(type = 16, length = 56)/of.ofp_stats_request(type =1)/ofp_flow_wildcards/ofp_match/of.ofp_flow_stats_request(out_port = ofp_flow_mod.out_port), #flow stats
2: of.ofp_header(type = 16, length =56)/of.ofp_stats_request(type = 2)/ofp_flow_wildcards/ofp_match/of.ofp_aggregate_stats_request(), # aggregate stats request
3: of.ofp_header(type = 16, length = 12)/of.ofp_stats_request(type = 3), #Type of OFPST_TABLE (0)
4: of.ofp_header(type = 16, length =20)/of.ofp_stats_request(type = 4)/of.ofp_port_stats_request(port_no = port), # port stats request
5: of.ofp_header(type = 16, length =20)/of.ofp_stats_request(type =5)/of.ofp_queue_stats_request(), #queue request
6: of.ofp_header(type = 16, length = 12)/of.ofp_stats_request(type = 0xffff) #vendor request
}
return msg[Type]
def client_handler(address, fd, events):
sock = fd_map[fd]
if events & io_loop.READ:
data = sock.recv(1024)
if data == '':
print "connection dropped"
io_loop.remove_handler(fd)
if len(data) < 8:
print "not a openflow message"
else:
if len(data) > 8:
rmsg = of.ofp_header(data[0:8])
body = data[8:]
else:
rmsg = of.ofp_header(data)
handler = {
0: ofp_handler.hello_handler(body),
1: ofp_handler.error_handler(body),
2: ofp_handler.echo_request_handler(rmsg),
3: ofp_handler.echo_reply_handler(body),
4: ofp_handler.echo_reply_handler(body),
5: ofp_handler.features_request_handler(body),
6: ofp_handler.features_request_handler(body),
7: ofp_handler.features_reply_handler(body, fd),
8: None,
9: None,
10: ofp_handler.packet_in_handler(body, fd),
11: ofp_handler.flow_removed_handler(body),
12: ofp_handler.port_status_handler(body),
13: ofp_handler.packet_out_handler(body),
14: ofp_handler.flow_mod_handler(body),
15: ofp_handler.port_mod_handler(body),
16: ofp_handler.status_request_handler(body),
17: ofp_handler.status_reply(body), #body
18: ofp_handler.barrier_request_handler(body),
19: ofp_handler.barrier_reply_handler(body),
20: ofp_handler.get_config_request_handler(body),
21: ofp_handler.get_config_reply_handler(body),
24: ofp_handler.cfeatrues_reply_handler(body) #body
}
if rmsg.type == 6:
(msg, port_info) = handler[6]
global ready
ready = 1
elif rmsg.type == 24:
(msg, port_info) = handler[24]
ready = 1
else:
msg = handler[rmsg.type]
message_queue_map[sock].put(str(msg))
io_loop.update_handler(fd, io_loop.WRITE)
global count
if ready and count % period == 0:
#print "send stats_requests"
flow = of.ofp_header() / of.ofp_flow_wildcards() / of.ofp_match(
) / of.ofp_flow_mod()
message_queue_map[sock].put(
str(ofp_handler.send_stats_request_handler(
1, flow))) #the parameter is the type of stats request
io_loop.update_handler(fd, io_loop.WRITE)
count = 1
count += 1
################################# We finish the actions of manipulateing ################################
if events & io_loop.WRITE:
try:
next_msg = message_queue_map[sock].get_nowait()
except Queue.Empty:
#print "%s queue empty" % str(address)
io_loop.update_handler(fd, io_loop.READ)
else:
#print 'sending "%s" to %s' % (of.ofp_header(next_msg).type, address)
sock.send(next_msg)
def run(self):
while core.running:
"""
This looks almost exactly like python's select.select, except that it's
it's handled cooperatively by recoco.
In this field, you could design your own CLI.
"""
string = raw_input("\n------------------------------\n1.info(ports)\n2.switch\n3.topo\n4.flow(flow type,dpid, type=0 flow, type=1 cflow)\n5.add link-type(add ip1,ip2,type(IP=1, OTN=2))\n6.stype(BOTH=0, IP=1, OTN=2, for all)\n7.create link(create ip1,ip2)\n8.delete(del ip1,ip2)\n?")
string = string.split(' ')
if string[0] == 'info':
action = 1
print tables.info_map
print "\n\n\n"
elif string[0] == 'switch':
action = 2
print tables.switch_map
print "\n\n\n"
elif string[0] == 'topo':
action = 3
print tables.topo_map
print "\n\n\n"
elif string[0] == 'flow':
action = 4
string = string[1].split(',')
flow_type = string[0]
dpid = int(string[1])
if flow_type == '0':
print "flows in dpid:", dpid, "\n"
if dpid in tables.flow_map.iterkeys():
for flow in tables.flow_map[dpid]:
flow.show()
elif flow_type == '1':
print "cflows in dpid:", dpid, "\n"
if dpid in tables.cflow_map.iterkeys():
for link, cflow in tables.cflow_map[dpid]:
cflow.show()
else:
print "wrong type!\n"
print "\n\n\n"
elif string[0] == 'add':
action = 5
global ip_type
string = string[1].split(',')
ip1 = string[0]
ip2 = string[1]
ip_type[(ip1,ip2)] = string[2]
ip_type[(ip2,ip1)] = string[2]
elif string[0] == 'stype':
action = 6
global stype
stype = string[1]
elif string[0] == 'create':#could not be completed with buffer_id
action = 7
string = string[1].split(',')
src = string[0]
dst = string[1]
road, link, route_type = route.add_link(src,dst,'1')
for dpid in road:
if dpid in link.iterkeys():
src_port, dst_port = link[dpid][0], link[dpid][1]
header = of.ofp_header(type = 14, length = 88, xid = dpid)
wildcards = of.ofp_flow_wildcards(OFPFW_NW_TOS = 1, OFPFW_DL_VLAN_PCP = 1,
OFPFW_NW_DST_MASK = 0, OFPFW_NW_SRC_MASK = 0,
OFPFW_TP_DST = 1, OFPFW_TP_SRC = 1,
OFPFW_NW_PROTO = 1, OFPFW_DL_TYPE = 1,
OFPFW_DL_DST = 1, OFPFW_DL_SRC = 1,
OFPFW_DL_VLAN = 1, OFPFW_IN_PORT = 0)
match = of.ofp_match(in_port = src_port,
nw_src = src, nw_dst =dst)
flow_mod = of.ofp_flow_mod(buffer_id = -1, idle_timeout = 0, hard_timeout = 0, flags = 1, out_port = dst_port)
action_header = oof.ofp_action_header(type = 0)
action_output = of.ofp_action_output(type = 0, port = dst_port, len = 8)
msg = header/wildcards/match/flow_mod/action_header/action_output
for fd,dp in tables.sock_dpid.items():
if dpid == dp[1]:
sock = tables.fd_map[fd]
break
sock.send(str(msg))
elif string[0] == 'del':
action = 8
#todo: delete the flows in swithes whenever you want
string = string[1].split(',')
src = string[0]
dst = string[1]
if (src,dst) not in ip_type.iterkeys():
print "there is no flow for ", src, " and ", dst, "\n"
else:
remove_type = ip_type[src,dst]
if remove_type == '1':#for ip, flow in tables.flow_map
for link, road in tables.road_map.items():
if link == (src,dst):#find the link, from src to dst
for dpid in road:#delete the related flow in every switches
for fd,dp in tables.sock_dpid.items():
if dpid == dp[1]:#find dpid-sock
sock = tables.fd_map[fd]
break
if dpid in tables.flow_map.iterkeys():
for item in tables.flow_map[dpid]:
if item.payload.payload.nw_src == src and item.payload.payload.nw_dst == dst:
data = str(item)
header = of.ofp_header(data[0:8])
header.length = 72
wildcards = of.ofp_flow_wildcards(data[8:12])
match = of.ofp_match(data[12:48])
flow_mod = of.ofp_flow_mod(data[48:72])
flow_mod.command = 4
msg = header/wildcards/match/flow_mod
sock.send(str(msg))
break
break
elif remove_type == '2':#for otn, cflow in tables.cflow_map
pass
elif string[0] == '0':
print "stop input function...\n"
return
else:
log.warning("Character string cannot be identified!")
continue
print action
def client_handler(address, fd, events):
global ip_type
sock = tables.fd_map[fd]
if events & io_loop.READ:
data = sock.recv(16384)
if data == '':
print "connection dropped"
#when switch is dropped, the outdated information should be deleted
io_loop.remove_handler(fd)
if fd in tables.fd_map.iterkeys() and fd in tables.sock_dpid.iterkeys():
dpid = tables.sock_dpid[fd][1]
tables.sock_dpid.pop(fd)
tables.fd_map.pop(fd)
for link in tables.topo_map.iterkeys():
if tables.topo_map[link]['status'] != -1 and (link[0] == dpid or link[2] == dpid):
tables.topo_map[link]['status'] = -1#the link will not be re-counted
dc.topo_flag += 2#when topo_flag>0, controller will stop dealing with packet
tables.switch_map.pop(dpid)
if dpid in tables.info_map.iterkeys():
tables.info_map.pop(dpid)
if dpid in tables.flow_map.iterkeys():
tables.flow_map.pop(dpid)
create_topo._connection_down(dpid)#renew the topo in discovery.py
create_topo._sender._connection_down(dpid)
if len(data)<8:
print "not a openflow message"
else:
if len(data)>8:
rmsg = of.ofp_header(data[0:8])
body = data[8:]
else:
rmsg = of.ofp_header(data)
if rmsg.type == 0:
print "OFPT_HELLO"
msg = of.ofp_header(type = 5)#we send the features_request here.
print "OFPT_FEATURES_REQUEST"
io_loop.update_handler(fd, io_loop.WRITE)
message_queue_map[sock].put(data)
message_queue_map[sock].put(str(msg))
elif rmsg.type == 1:
print "OFPT_ERROR"
of.ofp_error_msg(body).show()
elif rmsg.type == 2:
#since the ECHO is too frequent, the print is canceled
#print "OFPT_ECHO_REQUEST"
msg = of.ofp_header(type=3, xid=rmsg.xid)
message_queue_map[sock].put(str(msg))
io_loop.update_handler(fd, io_loop.WRITE)
elif rmsg.type == 3:
print "OFPT_ECHO_REPLY"
elif rmsg.type == 4:
print "OFPT_VENDOR"
elif rmsg.type == 5:
print "OFPT_FEATURES_REQUEST"
elif rmsg.type == 6:
print "OFPT_FEATURES_REPLY"
msg = of.ofp_features_reply(body[0:24]) #length of reply msg
tables.sock_dpid[fd]=[0, msg.datapath_id] #sock_dpid[fd] comes from here.
port_info_raw = str(body[24:]) #we change it into str so we can manipulate it.
port_info = {}
print "port number:",len(port_info_raw)/48, "total length:", len(port_info_raw)
for i in range(len(port_info_raw)/48):
port_info[i] = of.ofp_phy_port(port_info_raw[0+i*48:48+i*48])
print port_info[i].port_no
elif rmsg.type == 10:
#print "OFPT_PACKET_IN"
pkt_in_msg = of.ofp_packet_in(body)#buffer_id+in_port
raw = pkt_in_msg.load
pkt_ = ethernet(raw)#this method can be located in pox
pkt_parsed = of.Ether(raw)
dpid = tables.sock_dpid[fd][1]
if pkt_.effective_ethertype == 0x88cc:#deal with the LLDP for topo
create_topo._handle_openflow_PacketIn(pkt_in_msg, pkt_, dpid)
if dc.topo_flag:#when the topo is not completed, do nothing
pass
else:
if pkt_.effective_ethertype == 0x0806:
#the ARP table is maintained for hosts' MAC in tables.py
print "\n\nARP\n\n"
request = pkt_parsed.next
if request.opcode == arp.REQUEST:
reply = arp()
reply.hwtype = request.hwtype
reply.prototype = request.prototype
reply.hwlen = request.hwlen
reply.protolen = request.protolen
reply.opcode = arp.REPLY
reply.hwdst = request.hwsrc
reply.protodst = request.protosrc
reply.protosrc = request.protodst
reply.hwsrc = tables.get_mac(request.protodst.toStr())
#reply.hwsrc = tables.ip_mac[request.protodst]
e_dpid = tables.sock_dpid[fd][1]
for p,v in tables.switch_map[e_dpid]['port'].items():
if v.port_no == pkt_in_msg.in_port:
e_src = v.hw_addr
e = ethernet(type = pkt_parsed.type, src = e_src, dst = pkt_parsed.src)
e.set_payload(reply)
msg = off.ofp_packet_out()
msg.data = e.pack()
msg.actions.append(off.ofp_action_output(port = off.OFPP_IN_PORT))#port problem
msg.in_port = pkt_in_msg.in_port
msg = msg.pack()
io_loop.update_handler(fd, io_loop.WRITE)
message_queue_map[sock].put(str(msg))
elif pkt_.effective_ethertype == 0x8100:
#to detect VLAN packets
print "VLAN:\n"
packet = pkt_.next
print packet.__dict__
elif pkt_.effective_ethertype == 0x0800:
#print "\n\nIP\n\n"
#use the packet to produce flow_mod
packet = pkt_.next
if isinstance(packet, ipv4):
src = packet.srcip.toStr()
dst = packet.dstip.toStr()
dpid = tables.sock_dpid[fd][1]
#the routing type of the link(src,dst) is based on s_type
if (src, dst) in ip_type.iterkeys():
s_type = ip_type[(src,dst)]
elif stype != '0':
s_type = stype
else:
s_type = '0'
#src_mac = tables.switch_map[dpid]['port'][src_port].hw_addr
#dst_mac = tables.switch_map[dpid]['port'][dst_port].hw_addr
road, rlink, route_type = route.add_link(src, dst, s_type)
#establish info for barrier
if (src,dst) not in tables.road_map.iterkeys():
tables.road_map[(src,dst)] = road
if (src,dst) not in tables.barrier_map.iterkeys():
tables.barrier_map[(src,dst)] = {}
if dpid not in tables.barrier_map[(src,dst)].iterkeys():
tables.barrier_map[(src,dst)][dpid] = rmsg.xid
if route_type == 0:#ip link, send flow
ip_type[(src,dst)] = '1'
if dpid in rlink.iterkeys():
src_port, dst_port = rlink[dpid][0], rlink[dpid][1]
print "flow from ", src, " to ", dst, "\n"
print "dpid:",dpid," inport:",src_port," outport:",dst_port, "\n"
print "-------------------------"
header = of.ofp_header(type=14, length = 88, xid=rmsg.xid)
wildcards = of.ofp_flow_wildcards(OFPFW_NW_TOS=1, OFPFW_DL_VLAN_PCP=1,
OFPFW_NW_DST_MASK=63, OFPFW_NW_SRC_MASK=63,
OFPFW_TP_DST=1, OFPFW_TP_SRC=1,
OFPFW_NW_PROTO=1, OFPFW_DL_TYPE=1,
OFPFW_DL_DST=0, OFPFW_DL_SRC=0,
OFPFW_DL_VLAN=1, OFPFW_IN_PORT=0)
match = of.ofp_match(in_port=pkt_in_msg.in_port,
dl_src = pkt_parsed.src, dl_dst = pkt_parsed.dst,
dl_type = pkt_parsed.type,
nw_tos = pkt_parsed.payload.tos,
nw_proto = pkt_parsed.payload.proto,
nw_src=src, nw_dst=dst)
flow_mod = of.ofp_flow_mod(buffer_id = pkt_in_msg.buffer_id, idle_timeout = 0, hard_timeout = 30, flags = 1, cookie = rmsg.xid, out_port = dst_port)
action_header = oof.ofp_action_header(type = 0)
action_output = of.ofp_action_output(type = 0, port = dst_port, len = 8)
msg = header/wildcards/match/flow_mod/action_header/action_output
#here is to renew the flow_map
if dpid not in tables.flow_map.iterkeys():
tables.flow_map[dpid] = []
tables.flow_map[dpid].append(msg)
else:
for flow in tables.flow_map[dpid]:
flow_match = of.ofp_match((str(flow))[12:48])
if match == flow_match:
tables.flow_map[dpid].remove(flow)
break
tables.flow_map[dpid].append(msg)
message_queue_map[sock].put(str(msg))
io_loop.update_handler(fd, io_loop.WRITE)
elif route_type == 1:#otn or wavelenth
ip_type[(src,dst)] = '2'
if dpid in rlink.iterkeys():
src = packet.srcip.toStr()
dst = packet.dstip.toStr()
src_port, dst_port = rlink[dpid][0], rlink[dpid][1]
if (src,dst) not in tables.source_map.iterkeys():
tables.source_map[(src,dst)] = {}
if dpid not in tables.source_map[(src,dst)].iterkeys():
tables.source_map[(src,dst)][dpid] = {}
if src_port not in tables.source_map[(src,dst)][dpid].iterkeys():
tables.source_map[(src,dst)][dpid][src_port] = []
if dst_port not in tables.source_map[(src,dst)][dpid].iterkeys():
tables.source_map[(src,dst)][dpid][dst_port] = []
if dpid == road[-1]:#src host port has no slot
src_slot = -1
else:
for i in xrange(0,80):
if tables.info_map[dpid][src_port][i]['status'] == 0:
tables.info_map[dpid][src_port][i]['status'] = 1
src_slot = i
tables.source_map[(src,dst)][dpid][src_port].append(i)
break
if dpid == road[0]:#dst host port has no slot:
dst_slot = -1
else:
for i in xrange(0,80):
if tables.info_map[dpid][dst_port][i]['status'] == 0:
tables.info_map[dpid][dst_port][i]['status'] = 1
dst_slot = i
tables.source_map[(src,dst)][dpid][dst_port].append(i)
break
cflow_mod = of.ofp_header(type=0xff, xid=rmsg.xid)\
/of.ofp_cflow_mod(command=0)\
/of.ofp_connect_wildcards()\
/of.ofp_connect(in_port = pkt_in_msg.in_port)\
/of.ofp_action_output(type=0, port=dst_port, len=8)
type = switch_info[tables.sock_dpid[fd][0]]
if route_type == 1:#for OTN
if src_slot == -1:
cflow_mod.payload.payload.payload.nport_in = 81
else:
cflow_mod.payload.payload.payload.nport_in = src_slot
if dst_slot == -1:
cflow_mod.payload.payload.payload.nport_out = 81
else:
cflow_mod.payload.payload.payload.nport_out = dst_slot
cflow_mod.payload.payload.payload.supp_sw_otn_gran_out = tables.switch_map[dpid]['port'][dst_port].SUPP_SW_GRAN
cflow_mod.payload.payload.payload.sup_otn_port_bandwidth_out = tables.switch_map[dpid]['port'][dst_port].sup_otn_port_bandwidth
elif route_type == 2:#for wavelength
cflow_mod.payload.payload.payload.wport_in = src_slot
cflow_mod.payload.payload.payload.wport_out = dst_slot
#this field is used to record cflow, but I have no ideal about how to delete the outdate flow---------------------
if dpid not in tables.cflow_map.iterkeys():#cflow_map,12.19
tables.cflow_map[dpid] = {}
tables.cflow_map[dpid][(src,dst)] = cflow_mod
print "cflow from ", src, " to ", dst, "\n"
print "dpid:", dpid, " in_port:", cflow_mod.payload.payload.payload.in_port, " out_port:", cflow_mod.payload.payload.payload.payload.port, "\n"
print "------------------------"
message_queue_map[sock].put(str(cflow_mod))
io_loop.update_handler(fd, io_loop.WRITE)
#send barrier
msg = of.ofp_header(type = 18,xid = rmsg.xid)
message_queue_map[sock].put(str(msg))
io_loop.update_handler(fd, io_loop.WRITE)
elif rmsg.type == 11:
print "OFPT_FLOW_REMOVED"
elif rmsg.type == 12:
print "OFPT_PORT_STATUS"
elif rmsg.type == 13:
print "OFPT_PACKET_OUT"
elif rmsg.type == 14:
print "OFPT_FLOW_MOD"
elif rmsg.type == 15:
print "OFPT_PORT_MOD"
elif rmsg.type == 16:
print "OFPT_STATS_REQUEST"
elif rmsg.type == 17 and len(data)> 12:
print "OFPT_STATS_REPLY"
# 1. parsing ofp_stats_reply
reply_header = of.ofp_stats_reply(body[:4])
# 2.parsing ofp_flow_stats msg
if reply_header.type == 0:
reply_desc = of.ofp_desc_stats(body[4:])
reply.show()
elif reply_header.type == 1 and len(data)>92:
#here informatioin is used for flow stats
reply_body_data1 = of.ofp_flow_stats(body[4:8])
# match field in ofp_flow_stats
reply_body_wildcards = of.ofp_flow_wildcards(body[8:12])
reply_body_match = of.ofp_match(body[12:48])
# second part in ofp_flow_stats
reply_body_data2 = of.ofp_flow_stats_data(body[48:92])
# 3.parsing actions
reply_body_action = []
if len(body[92:])>8: #it is very important!
num = len(body[92:])/8
for x in xrange(num):
reply_body_action.append(of.ofp_action_output(body[92+x*8:100+x*8]))
msg = reply_header/reply_body_data1/reply_body_wildcards/reply_body_match/reply_body_data2
#the followings are about Load Balancing
if fd in tables.fd_map.iterkeys() and fd in tables.sock_dpid.iterkeys():
dpid = tables.sock_dpid[fd][1]
if dpid in tables.flow_map.iterkeys():
src_mac = reply_body_match.dl_src
dst_mac = reply_body_match.dl_dst
for flow in tables.flow_map[dpid]:
if flow.payload.payload.dl_src == src_mac and flow.payload.payload.dl_dst == dst_mac:
src_ip = flow.payload.payload.nw_src
dst_ip = flow.payload.payload.nw_dst
pair = (src_ip,dst_ip)
flow_time = float(reply_body_data2.duration_sec) + float(reply_body_data2.duration_nsec/1000000000)
flow_data = float(reply_body_data2.byte_count)
if pair not in ip_stats.iterkeys():
ip_stats[pair] = {}
ip_stats[pair][0] = {}
ip_stats[pair][0]['flow_time'] = flow_time
ip_stats[pair][0]['flow_data'] = flow_data
else:
if 1 in ip_stats[pair].iterkeys():#have a pair
ip_stats[pair][0]['flow_time'] = ip_stats[pair][1]['flow_time']
ip_stats[pair][0]['flow_data'] = ip_stats[pair][1]['flow_data']
else:
ip_stats[pair][1] = {}
ip_stats[pair][1]['flow_time'] = flow_time
ip_stats[pair][1]['flow_data'] = flow_data
if flow_time != ip_stats[pair][0]['flow_time']:
load = (flow_data - ip_stats[pair][0]['flow_data']) / (flow_time - ip_stats[pair][0]['flow_time'])
print "now the link ", pair, " load is ", load, "(byte/s)\n"
global switch_load
if load > switch_load:#change to cflow
ip_type[pair] = '2'
#todo:flow_mod(delete)
elif reply_header.type == 2:
reply_aggregate = of.ofp_aggregate_stats_reply(body[4:])
reply_aggregate.show()
elif reply_header.type == 3:
#table_stats
length = rmsg.length - 12
num = length/64
for i in xrange(num):
table_body = body[4+i*64:i*64+68]
reply_table_stats = of.ofp_table_stats(table_body[:36])
table_wildcards = of.ofp_flow_wildcards(table_body[36:40])
reply_table_stats_data = of.ofp_table_stats_data(table_body[40:64])
msg_tmp = reply_header/reply_table_stats/table_wildcards/reply_table_stats_data
msg = rmsg/msg_tmp
msg.show()
elif reply_header.type == 4:
#port stats reply
length = rmsg.length - 12
num = length/104
for i in xrange(num):
offset = 4+i*104
reply_port_stats = of.ofp_port_stats_reply(body[offset:(offset+104)])
msg_tmp = reply_header/reply_port_stats
msg = rmsg/msg_tmp
msg.show()
elif reply_header.type == 5:
#queue reply
length = rmsg.length - 12
num = length/32
if num: #if the queue is empty ,you need to check it !
for i in xrange(num):
offset = 4+i*32
queue_reply = of.ofp_queue_stats(body[offset:offset+32])
msg_tmp = reply_header/queue_reply
msg = rmsg/msg_tmp
msg.show()
elif reply_header.type == 0xffff:
#vendor reply
msg = rmsg/reply_header/of.ofp_vendor(body[4:])
elif rmsg.type == 18:
print "OFPT_BARRIER_REQUEST"
#no message body, the xid is the previous barrier request xid
elif rmsg.type == 19:
barrier = 0
dpid = tables.sock_dpid[fd][1]
for a,b in tables.barrier_map.items():
for k,v in b.items():
if k == dpid and v == rmsg.xid:
if dpid == tables.road_map[a][0]:#if the barrier is from the dst switch, then the road is completed
barrier = 1
print "road ", a, " is completed!\n"
tables.barrier_map.pop(a)
if barrier:
break
#print "OFPT_BARRIER_REPLY: ", rmsg.xid, "Successful"
elif rmsg.type == 20:
print "OFPT_QUEUE_GET_CONFIG_REQUEST"
elif rmsg.type == 21:
print "OFPT_QUEUE_GET_CONFIG_REPLY"
elif rmsg.type == 24:
print "OFPT_CFEATURES_REPLY"
msg = of.ofp_cfeatures_reply(body[0:24])#length of reply msg
#bind the bpid and type (type, dpid)
#OTN:WAVE:IP b'000'
TYPE = msg.OFPC_IP_SWITCH + msg.OFPC_WAVE_SWITCH * 2 + msg.OFPC_OTN_SWITCH * 4
tables.sock_dpid[fd] = [TYPE, msg.datapath_id]#IP only
port_info_raw = body[24:]
port_info = {}
port_i = {}
print "port number:",len(port_info_raw)/72, "total length:", len(port_info_raw)
for i in range(len(port_info_raw)/72):
port_info[i] = of.ofp_phy_cport(port_info_raw[i*72:72+i*72])
port_i[port_info[i].port_no] = port_info[i]
switch_type = tables.sock_dpid[fd][0]#features recorded in switch_map
tables.switch_map[msg.datapath_id] = {'features':msg, 'type':switch_type, 'port':port_i}
tables.info_map[msg.datapath_id] = {}
#start to discovery
lldp_flow = create_topo._connection_up(msg.datapath_id)
message_queue_map[sock].put(str(lldp_flow))
io_loop.update_handler(fd, io_loop.WRITE)#discovery-handle
create_topo._sender._connection_up(msg.datapath_id, port_info)
def client_handler(address, fd, events):
sock = fd_map[fd]
if events & io_loop.READ:
data = sock.recv(1024)
if data == '':
print "connection dropped"
io_loop.remove_handler(fd)
if len(data)<8:
print "not a openflow message"
else:
if len(data)>8:
rmsg = of.ofp_header(data[0:8])
body = data[8:]
else:
rmsg = of.ofp_header(data)
handler = { 0:ofp_handler.hello_handler(body),
1:ofp_handler.error_handler(body),
2:ofp_handler.echo_request_handler(rmsg),
3:ofp_handler.echo_reply_handler(body),
4:ofp_handler.echo_reply_handler(body),
5:ofp_handler.features_request_handler(body),
6:ofp_handler.features_request_handler(body),
7:ofp_handler.features_reply_handler(body,fd),
8:None,
9:None,
10:ofp_handler.packet_in_handler(body,fd),
11:ofp_handler.flow_removed_handler(body),
12:ofp_handler.port_status_handler(body),
13:ofp_handler.packet_out_handler(body),
14:ofp_handler.flow_mod_handler(body),
15:ofp_handler.port_mod_handler(body),
16:ofp_handler.status_request_handler(body),
17:ofp_handler.status_reply(body),#body
18:ofp_handler.barrier_request_handler(body),
19:ofp_handler.barrier_reply_handler(body),
20:ofp_handler.get_config_request_handler(body),
21:ofp_handler.get_config_reply_handler(body),
24:ofp_handler.cfeatrues_reply_handler(body) #body
}
if rmsg.type == 6:
(msg, port_info) = handler[6]
global ready
ready = 1
elif rmsg.type == 24:
(msg, port_info) = handler[24]
ready = 1
else:
msg = handler[rmsg.type]
message_queue_map[sock].put(str(msg))
io_loop.update_handler(fd, io_loop.WRITE)
global count
if ready and count % period == 0:
#print "send stats_requests"
flow =of.ofp_header()/of.ofp_flow_wildcards()/of.ofp_match()/of.ofp_flow_mod()
message_queue_map[sock].put(str(ofp_handler.send_stats_request_handler(1,flow))) #the parameter is the type of stats request
io_loop.update_handler(fd, io_loop.WRITE)
count = 1
count+=1
################################# We finish the actions of manipulateing ################################
if events & io_loop.WRITE:
try:
next_msg = message_queue_map[sock].get_nowait()
except Queue.Empty:
#print "%s queue empty" % str(address)
io_loop.update_handler(fd, io_loop.READ)
else:
#print 'sending "%s" to %s' % (of.ofp_header(next_msg).type, address)
sock.send(next_msg)
