def _handle_PacketIn (event):
packet = event.parsed
if packet.effective_ethertype == LAT_TYPE:
"""
Handle incoming latency packets
"""
#print dpidToStr(event.dpid)
port = packet.src
[prevtime, swdpdest, swdpsrc] = packet.payload.split(',')
prevtime = float(prevtime)
currtime = time.time()
#print "PrevTime = ", prevtime, " CurrTime = ", currtime
dest_dpid = dpidToStr(event.dpid)
if dest_dpid == swdpdest:
#print "DPID matched"
latency = round((((currtime - prevtime)*1000) - dpid_latency[strToDPID(swdpsrc)] - dpid_latency[event.dpid]), 4)
#print "Latency =",latency
#swd = ports[dpidToStr(self.dpid)]
swd = ports[swdpsrc]
#for k in swd:
# if swd[k][0] == mac:
# break
k = 0
for p in switch_adjacency[strToDPID(swdpsrc)]:
if swdebug:
print swdpsrc,"\n",switch_adjacency[strToDPID(swdpsrc)]
if switch_adjacency[strToDPID(swdpsrc)][p] is event.dpid:
if swdebug:
print "matches with",dpidToStr(event.dpid)," when p = ",p
k = p
if latency >=0:
if k in ports[swdpsrc]:
ports[swdpsrc][k][0] = latency
return
def getPortInfo(self, switchid, port_name_or_number=None):
"return a port object carrying port info, or by omitting the port_name_or_number the whole switch info object"
req_switch_info = None
for s in list_switches():
if strToDPID(s['dpid']) == switchid:
req_switch_info = s
break
if not req_switch_info:
self.log.debug("info for switch %s not found" % switchid)
return None
if port_name_or_number == None:
return req_switch_info
if type(port_name_or_number) == int:
for p in req_switch_info['ports']:
if p['port_no'] == port_name_or_number:
return p
else:
for p in req_switch_info['ports']:
if p['name'] == port_name_or_number:
return p
self.log.debug("info for port %s on switch %s not found" % (port_name_or_number, switchid))
return None
def _exec_get_switch_desc (self, dpid):
dpid = strToDPID(dpid)
con = core.openflow.getConnection(dpid)
if con is None:
return make_error("No such switch")
return OFSwitchDescRequest(con).get_response()
def getPortInfo(self, switchid, port_name_or_number=None):
"return a port object carrying port info, or by omitting the port_name_or_number the whole switch info object"
req_switch_info = None
for s in list_switches():
if strToDPID(s['dpid']) == switchid:
req_switch_info = s
break
if not req_switch_info:
self.log.debug("info for switch %s not found" % switchid)
return None
if port_name_or_number == None:
return req_switch_info
if type(port_name_or_number) == int:
for p in req_switch_info['ports']:
if p['port_no'] == port_name_or_number:
return p
else:
for p in req_switch_info['ports']:
if p['name'] == port_name_or_number:
return p
self.log.debug("info for port %s on switch %s not found" %
(port_name_or_number, switchid))
return None
def _exec_set_table (self, dpid, flows):
dpid = strToDPID(dpid)
con = core.openflow.getConnection(dpid)
if con is None:
return make_error("No such switch")
return OFSetTableRequest(con, flows).get_response()
def _exec_cmd_get_flow_stats (self, event):
try:
msg = event.msg
dpid = strToDPID(msg['dpid'])
con = core.openflow.getConnection(dpid)
if con is None:
raise RuntimeError("No such switch")
match = event.msg.get('match')
table_id = event.msg.get('table_id', 0xff)
out_port = event.msg.get('out_port', of.OFPP_NONE)
sr = of.ofp_stats_request()
sr.body = of.ofp_flow_stats_request()
if match is None:
match = of.ofp_match()
else:
match = dict_to_match(match)
sr.body.match = match
sr.body.table_id = table_id
sr.body.out_port = out_port
con.send(sr)
self.reply(event,**{'type':'set_table','xid':sr.xid})
except:
#log.exception("Exception in get_flow_stats")
log.debug("Exception in get_flow_stats - %s:%s",
sys.exc_info()[0].__name__,
sys.exc_info()[1])
self.reply(event,
exception="%s: %s" % (sys.exc_info()[0],sys.exc_info()[1]),
traceback=traceback.format_exc())
def _exec_cmd_set_table(self, event):
try:
msg = event.msg
dpid = strToDPID(msg["dpid"])
con = core.openflow.getConnection(dpid)
if con is None:
raise RuntimeError("No such switch")
xid = of.generate_xid()
fm = of.ofp_flow_mod()
fm.xid = xid
fm.command = of.OFPFC_DELETE
con.send(fm)
bar = of.ofp_barrier_request()
bar.xid = xid
con.send(bar)
for flow in msg.get("flows", []):
fm = dict_to_flow_mod(flow)
fm.xid = xid
con.send(fm)
# con.send(of.ofp_barrier_request(xid=xid))
con.send(of.ofp_barrier_request(xid=xid))
self.reply(event, **{"type": "set_table", "xid": xid})
except:
# log.exception("Exception in set_table")
log.debug("Exception in set_table - %s:%s", sys.exc_info()[0].__name__, sys.exc_info()[1])
self.reply(
event, exception="%s: %s" % (sys.exc_info()[0], sys.exc_info()[1]), traceback=traceback.format_exc()
)
def _exec_set_table(self, dpid, flows):
dpid = strToDPID(dpid)
con = core.openflow.getConnection(dpid)
if con is None:
return make_error("No such switch")
return OFSetTableRequest(con, flows).get_response()
def _exec_cmd_get_flow_stats(self, event):
try:
msg = event.msg
dpid = strToDPID(msg['dpid'])
con = core.openflow.getConnection(dpid)
if con is None:
raise RuntimeError("No such switch")
match = event.msg.get('match')
table_id = event.msg.get('table_id', 0xff)
out_port = event.msg.get('out_port', of.OFPP_NONE)
sr = of.ofp_stats_request()
sr.body = of.ofp_flow_stats_request()
if match is None:
match = of.ofp_match()
else:
match = dict_to_match(match)
sr.body.match = match
sr.body.table_id = table_id
sr.body.out_port = out_port
con.send(sr)
self.reply(event, **{'type': 'set_table', 'xid': sr.xid})
except:
#log.exception("Exception in get_flow_stats")
log.debug("Exception in get_flow_stats - %s:%s",
sys.exc_info()[0].__name__,
sys.exc_info()[1])
self.reply(event,
exception="%s: %s" %
(sys.exc_info()[0], sys.exc_info()[1]),
traceback=traceback.format_exc())
def _exec_get_flow_stats (self, dpid, *args, **kw):
dpid = strToDPID(dpid)
con = core.openflow.getConnection(dpid)
if con is None:
return make_error("No such switch")
return OFFlowStatsRequest(con, *args, **kw).get_response()
def _exec_get_switch_desc(self, dpid):
dpid = strToDPID(dpid)
con = core.openflow.getConnection(dpid)
if con is None:
return make_error("No such switch")
return OFSwitchDescRequest(con).get_response()
def handle_pkt(event):
"""
Handle incoming latency packets
"""
packet = event.parsed
if packet.effective_ethertype == LAT_TYPE:
print dpidToStr(event.dpid)
port = packet.src
[prevtime, mac, swdpdest, swdpsrc] = packet.payload.split(',')
prevtime = float(prevtime)
currtime = time.time()
#print "PrevTime = ", prevtime, " CurrTime = ", currtime
dest_dpid = dpidToStr(event.dpid)
if dest_dpid == swdpdest:
#print "DPID matched"
latency = round(
(((currtime - prevtime) * 1000) -
dpid_latency[strToDPID(swdpsrc)] - dpid_latency[event.dpid]),
4)
#swd = ports[dpidToStr(self.dpid)]
swd = ports[swdpsrc]
for k in swd:
if swd[k][0] == mac:
break
if latency >= 0:
ports[swdpsrc][k][1] = latency
def _exec_get_flow_stats(self, dpid, *args, **kw):
dpid = strToDPID(dpid)
con = core.openflow.getConnection(dpid)
if con is None:
return make_error("No such switch")
return OFFlowStatsRequest(con, *args, **kw).get_response()
def _exec_get_pstats (self, dpid, *args, **kw):
dpid = strToDPID(dpid)
con = core.openflow.getConnection(dpid)
if con is None:
return make_error("No such switch")
params = OFPortStatsRequest(con, *args, **kw).get_response()
params['ver'] = self.version
return params
def _exec_get_astats (self, dpid):
dpid = strToDPID(dpid)
con = core.openflow.getConnection(dpid)
if con is None:
return make_error("No such switch")
params = OFAggregateStatsRequest(con).get_response()
params['ver'] = self.version
return params
def fix():
msg = of.ofp_flow_mod()
msg.priority = DEFAULT_PRIORITY
msg.match.in_port = 5
msg.match.dl_type = ARP_DL_TYPE
msg.actions.append(of.ofp_action_output(port=3))
msg.actions.append(of.ofp_action_output(port=2))
core.openflow.sendToDPID(strToDPID("62-a1-74-3c-51-43"), msg)
'''
def __init__(self, ipStr, macStr, dpidStr, port):
self.ipStr = ipStr
self.ipAddr = IPAddr(ipStr)
self.macStr = macStr
self.macAddr = EthAddr(macStr)
self.dpidStr = dpidStr
self.dpid = strToDPID(self.dpidStr)
self.port = port
self._installDefaultRules()
def __init__(self, ipStr, macStr, dpidStr, port):
self.ipStr = ipStr
self.ipAddr = IPAddr(ipStr)
self.macStr = macStr
self.macAddr = EthAddr(macStr)
self.dpidStr = dpidStr
self.dpid = strToDPID(self.dpidStr)
self.port = port
self._installDefaultRules()
def _handle_port_stats(event):
global start_time
global network
port_stats = flow_stats_to_list(event.stats)
#log.debug(port_stats)
for node in network:
if (dpidToStr(
event.dpid) == network[node]["MAC"]): # find which switch
for link in network[node][
"link"]: # for each link connected to this switch
try:
# calculate updated congestion value
link["cong_value"] = MBPS * (
port_stats[link["out_port"]]["tx_bytes"] -
link["prev_tx_bytes"])
# has controller just started up?
if ((datetime.now() - start_time).total_seconds() >
WAIT_FOR_STARTUP):
#log.debug("\nBW on node %s, port %s: (Mbps): %s\n", node, link["out_port"], link["cong_value"])
if (link["cong_value"] >
CONG_THRESH): # congestion detected
log.debug("\nCongestion on node %s, port %s\n",
node, link["out_port"])
if (network[node]["MAC"] == network["R4"]["MAC"]
): # Are we at R4?
# update UDP flow rule for R8
log.debug("\nUpdate R8 flow table\n")
msg = of.ofp_flow_mod()
msg.priority = HIGH_PRIORITY
msg.match.in_port = 3 # hardcoded
msg.match.dl_type = IPV4_DL_TYPE
msg.match.nw_proto = UDP_PROTO
msg.match.nw_dst = IPAddr(
"172.16.0.5", 30) # hardcoded for S1
msg.actions.append(
of.ofp_action_output(port=1)) # hardcoded
core.openflow.sendToDPID(
strToDPID(network["R8"]["MAC"]), msg)
# store tx_bytes for next iteration
link["prev_tx_bytes"] = port_stats[
link["out_port"]]["tx_bytes"]
except IndexError:
pass
def _handle_PacketIn(event):
packet = event.parsed
if packet.effective_ethertype == LAT_TYPE:
"""
Handle incoming latency packets
"""
#print dpidToStr(event.dpid)
port = packet.src
[prevtime, swdpdest, swdpsrc] = packet.payload.split(',')
prevtime = float(prevtime)
currtime = time.time()
#print "PrevTime = ", prevtime, " CurrTime = ", currtime
dest_dpid = dpidToStr(event.dpid)
if dest_dpid == swdpdest:
#print "DPID matched"
latency = round(
(((currtime - prevtime) * 1000) -
dpid_latency[strToDPID(swdpsrc)] - dpid_latency[event.dpid]),
4)
#print "Latency =",latency
#swd = ports[dpidToStr(self.dpid)]
swd = ports[swdpsrc]
#for k in swd:
# if swd[k][0] == mac:
# break
k = 0
for p in switch_adjacency[strToDPID(swdpsrc)]:
if swdebug:
print swdpsrc, "\n", switch_adjacency[strToDPID(swdpsrc)]
if switch_adjacency[strToDPID(swdpsrc)][p] is event.dpid:
if swdebug:
print "matches with", dpidToStr(
event.dpid), " when p = ", p
k = p
if latency >= 0:
if k in ports[swdpsrc]:
ports[swdpsrc][k][0] = latency
return
def _exec_cmd_packet_out (self, event):
try:
msg = event.msg
dpid = strToDPID(msg['dpid'])
con = core.openflow.getConnection(dpid)
if con is None:
raise RuntimeError("No such switch")
po = dict_to_packet_out(msg)
con.send(po)
except:
log.exception("Exception in packet_out")
self.reply(event,
exception="%s: %s" % (sys.exc_info()[0],sys.exc_info()[1]),
traceback=traceback.format_exc())
def _exec_cmd_packet_out (self, event):
try:
msg = event.msg
dpid = strToDPID(msg['dpid'])
con = core.openflow.getConnection(dpid)
if con is None:
raise RuntimeError("No such switch")
po = dict_to_packet_out(msg)
con.send(po)
except:
log.exception("Exception in packet_out")
self.reply(event,
exception="%s: %s" % (sys.exc_info()[0],sys.exc_info()[1]),
traceback=traceback.format_exc())
def pClient(username, mac, ip=""):
# permit traffic from the client to the router - i.e. auth successful
connection = core.openflow.getConnection(strToDPID(dpid))
MAC = EthAddr(mac)
IP = IPAddr(ip)
vlan = getVLANs(ip)
query = "INSERT into tbl_nac_session (username,mac_address,ip_address,start_dt) VALUES ('%s','%s','%s',now())" % (
username, mac, ip)
msg = None
# note: if the openflow switch supports L3 matching in addition to L2 matching
# note: matching on both will result in higher security - but not all support both.
# note: if we match on L3 and ARP matching is not supported (see sPortal),
# note: ARPs from the client will not flow to the router but rather to the portal
# note: so it does not make sense to match on L3 unless we can also match on ARPs
# note: but technically you could comment out "and dp_supports_arp_match" if you don't
# note: care that ARPs from clients always go to your portal which runs proxy ARP
if dp_supports_l3_match and dp_supports_arp_match:
msg = of.ofp_flow_mod()
msg.flags = of.OFPFF_SEND_FLOW_REM
msg.idle_timeout = client_idle_timeout
msg.priority = 32768
msg.match.in_port = client_port_match
msg.match.dl_src = MAC
msg.match.dl_type = pkt.ethernet.IP_TYPE
msg.match.nw_src = IP
msg.actions.append(of.ofp_action_vlan_vid(vlan_vid=vlan['trusted']))
msg.actions.append(of.ofp_action_output(port=router_port_action))
else:
msg = of.ofp_flow_mod()
msg.flags = of.OFPFF_SEND_FLOW_REM
msg.idle_timeout = client_idle_timeout
msg.priority = 32768
msg.match.dl_src = MAC
msg.actions.append(of.ofp_action_vlan_vid(vlan_vid=vlan['trusted']))
msg.actions.append(of.ofp_action_output(port=router_port_action))
if msg:
cursor = db.cursor()
cursor.execute(query)
connection.send(msg)
def _exec_cmd_set_table (self, event):
try:
msg = event.msg
dpid = strToDPID(msg['dpid'])
con = core.openflow.getConnection(dpid)
if con is None:
raise RuntimeError("No such switch")
xid = of.generate_xid()
"""
As modificações em um tabela de fluxo do controlador é feito com a mensagem OFPT_FLOW_MOD
"""
fm = of.ofp_flow_mod()
fm.xid = xid
"OFPFC_DELETE: Exclui todos os fluxos correspondentes .."
fm.command = of.OFPFC_DELETE
con.send(fm)
bar = of.ofp_barrier_request()
bar.xid = xid
con.send(bar)
for flow in msg.get('flows',[]):
fm = dict_to_flow_mod(flow)
fm.xid = xid
con.send(fm)
#con.send(of.ofp_barrier_request(xid=xid))
con.send(of.ofp_barrier_request(xid=xid))
self.reply(event,**{'type':'set_table','xid':xid})
except:
#log.exception("Exception in set_table")
log.debug("Exception in set_table - %s:%s",
sys.exc_info()[0].__name__,
sys.exc_info()[1])
self.reply(event,
exception="%s: %s" % (sys.exc_info()[0],sys.exc_info()[1]),
traceback=traceback.format_exc())
def pClient(username,mac,ip=""):
# permit traffic from the client to the router - i.e. auth successful
connection = core.openflow.getConnection(strToDPID(dpid))
MAC = EthAddr(mac)
IP = IPAddr(ip)
vlan = getVLANs(ip)
query = "INSERT into tbl_nac_session (username,mac_address,ip_address,start_dt) VALUES ('%s','%s','%s',now())" % (username,mac,ip)
msg = None
# note: if the openflow switch supports L3 matching in addition to L2 matching
# note: matching on both will result in higher security - but not all support both.
# note: if we match on L3 and ARP matching is not supported (see sPortal),
# note: ARPs from the client will not flow to the router but rather to the portal
# note: so it does not make sense to match on L3 unless we can also match on ARPs
# note: but technically you could comment out "and dp_supports_arp_match" if you don't
# note: care that ARPs from clients always go to your portal which runs proxy ARP
if dp_supports_l3_match and dp_supports_arp_match:
msg = of.ofp_flow_mod()
msg.flags = of.OFPFF_SEND_FLOW_REM
msg.idle_timeout = client_idle_timeout
msg.priority = 32768
msg.match.in_port = client_port_match
msg.match.dl_src = MAC
msg.match.dl_type = pkt.ethernet.IP_TYPE
msg.match.nw_src = IP
msg.actions.append(of.ofp_action_vlan_vid(vlan_vid = vlan['trusted']))
msg.actions.append(of.ofp_action_output(port = router_port_action))
else:
msg = of.ofp_flow_mod()
msg.flags = of.OFPFF_SEND_FLOW_REM
msg.idle_timeout = client_idle_timeout
msg.priority = 32768
msg.match.dl_src = MAC
msg.actions.append(of.ofp_action_vlan_vid(vlan_vid = vlan['trusted']))
msg.actions.append(of.ofp_action_output(port = router_port_action))
if msg:
cursor = db.cursor()
cursor.execute(query)
connection.send(msg)
def _exec_cmd_get_flow_stats (self, event):
try:
msg = event.msg
dpid = strToDPID(msg['dpid'])
con = core.openflow.getConnection(dpid)
if con is None:
raise RuntimeError("No such switch") "No such switch: sem essa mudança"
match = event.msg.get('match') "Descrição dos campos"
table_id = event.msg.get('table_id', 0xff) "table_id: mesa para fluxos ( padrão para todos).indica o próximo mesa no pipeline de processamento de pacotes."
"""
Para comandos OFPFC_DELETE * , requerem
entradas correspondentes para incluir isso como uma
porta de saída . Um valor de OFPP_ANY
indica nenhuma restrição
"""
"out_port: filtro por porta de saída (padrão para todos)"
out_port = event.msg.get('out_port', of.OFPP_NONE)
sr = of.ofp_stats_request()
sr.body = of.ofp_flow_stats_request()
if match is None:
match = of.ofp_match()
else:
match = dict_to_match(match)
sr.body.match = match
sr.body.table_id = table_id
sr.body.out_port = out_port
con.send(sr)
self.reply(event,**{'type':'set_table','xid':sr.xid})
except:
#log.exception("Exception in get_flow_stats")
log.debug("Exception in get_flow_stats - %s:%s",
sys.exc_info()[0].__name__,
sys.exc_info()[1])
self.reply(event,
exception="%s: %s" % (sys.exc_info()[0],sys.exc_info()[1]),
traceback=traceback.format_exc())
def handle_pkt (event):
"""
Handle incoming latency packets
"""
packet = event.parsed
if packet.effective_ethertype == LAT_TYPE:
print dpidToStr(event.dpid)
port = packet.src
[prevtime, mac, swdpdest, swdpsrc] = packet.payload.split(',')
prevtime = float(prevtime)
currtime = time.time()
#print "PrevTime = ", prevtime, " CurrTime = ", currtime
dest_dpid = dpidToStr(event.dpid)
if dest_dpid == swdpdest:
#print "DPID matched"
latency = round((((currtime - prevtime)*1000) - dpid_latency[strToDPID(swdpsrc)] - dpid_latency[event.dpid]), 4)
#swd = ports[dpidToStr(self.dpid)]
swd = ports[swdpsrc]
for k in swd:
if swd[k][0] == mac:
break
if latency >=0:
ports[swdpsrc][k][1] = latency
def _exec_cmd_set_table(self, event):
try:
msg = event.msg
dpid = strToDPID(msg['dpid'])
con = core.openflow.getConnection(dpid)
if con is None:
raise RuntimeError("No such switch")
xid = of.generate_xid()
fm = of.ofp_flow_mod()
fm.xid = xid
fm.command = of.OFPFC_DELETE
con.send(fm)
bar = of.ofp_barrier_request()
bar.xid = xid
con.send(bar)
for flow in msg.get('flows', []):
fm = dict_to_flow_mod(flow)
fm.xid = xid
con.send(fm)
#con.send(of.ofp_barrier_request(xid=xid))
con.send(of.ofp_barrier_request(xid=xid))
self.reply(event, **{'type': 'set_table', 'xid': xid})
except:
#log.exception("Exception in set_table")
log.debug("Exception in set_table - %s:%s",
sys.exc_info()[0].__name__,
sys.exc_info()[1])
self.reply(event,
exception="%s: %s" %
(sys.exc_info()[0], sys.exc_info()[1]),
traceback=traceback.format_exc())
def _handle_PacketIn (self, event):
def flood ():
""" Floods the packet """
if self.is_holding_down:
log.warning("Not flooding -- holddown active")
msg = of.ofp_packet_out()
# OFPP_FLOOD is optional; some switches may need OFPP_ALL
msg.actions.append(of.ofp_action_output(port = of.OFPP_FLOOD))
msg.buffer_id = event.ofp.buffer_id
msg.in_port = event.port
self.connection.send(msg)
def drop ():
# Kill the buffer
if event.ofp.buffer_id is not None:
msg = of.ofp_packet_out()
msg.buffer_id = event.ofp.buffer_id
event.ofp.buffer_id = None # Mark is dead
msg.in_port = event.port
self.connection.send(msg)
packet = event.parsed
loc = (self, event.port) # Place we saw this ethaddr
oldloc = mac_map.get(packet.src) # Place we last saw this ethaddr
################################################################ Handle LLDP Type ################################################################
if packet.effective_ethertype == packet.LLDP_TYPE:
drop()
return
##################################################################################################################################################
################################################################ Handle ARP Type ################################################################
if packet.type == ethernet.ARP_TYPE:
arppack = packet.find('arp')
if arppack.opcode == arp.REQUEST:
mac_map[packet.src] = loc # Learn position for ethaddr
log.debug("Learned %s at %s.%i", packet.src, loc[0], loc[1])
for switch in dpids:
if switch is self.dpid:
if swdebug:
print "Same switch"
continue
if swdebug:
print "Sending ARP REQ to",dpidToStr(switch)
action_out = [of.ofp_action_output(port = port) for port in host_ports[switch]]
core.openflow.sendToDPID(switch, of.ofp_packet_out(data=packet.pack(),action=action_out))
return
if arppack.opcode == arp.REPLY:
mac_map[packet.src] = loc
loc_dst = mac_map[packet.dst] # Learn position for ethaddr
if swdebug:
print "Send reply to DPID - ",str(loc_dst[0]),"port -",loc_dst[1]
if swdebug:
print "Type - ",type(str(loc_dst[0]))
action_out = of.ofp_action_output(port = loc_dst[1])
core.openflow.sendToDPID(strToDPID(str(loc_dst[0])), of.ofp_packet_out(data=packet.pack(),action=action_out))
return
################################################################# Handle LAT Type ################################################################
if packet.effective_ethertype == LAT_TYPE:
"""
Handle incoming latency packets
"""
#print dpidToStr(event.dpid)
port = packet.src
[prevtime, port_mac, swdpdest, swdpsrc] = packet.payload.split(',')
prevtime = float(prevtime)
currtime = time.time()
#print "PrevTime = ", prevtime, " CurrTime = ", currtime
dest_dpid = dpidToStr(event.dpid)
if dest_dpid == swdpdest:
#print "DPID matched"
latency = round((((currtime - prevtime)*1000) - dpid_latency[strToDPID(swdpsrc)] - dpid_latency[event.dpid]), 4)
#print "Latency =",latency
#swd = ports[dpidToStr(self.dpid)]
swd = ports[swdpsrc]
for k in swd:
if swd[k][4] == port_mac:
break
if latency >=0:
if k in ports[swdpsrc]:
ports[swdpsrc][k][0] = latency
return
##################################################################################################################################################
if oldloc is None:
if packet.src.is_multicast == False:
mac_map[packet.src] = loc # Learn position for ethaddr
log.debug("Learned %s at %s.%i", packet.src, loc[0], loc[1])
elif oldloc != loc:
drop()
return
# ethaddr seen at different place!
if core.openflow_discovery.is_edge_port(loc[0].dpid, loc[1]):
# New place is another "plain" port (probably)
log.debug("%s moved from %s.%i to %s.%i?", packet.src,
dpid_to_str(oldloc[0].dpid), oldloc[1],
dpid_to_str( loc[0].dpid), loc[1])
if packet.src.is_multicast == False:
mac_map[packet.src] = loc # Learn position for ethaddr
log.debug("Learned %s at %s.%i", packet.src, loc[0], loc[1])
elif packet.dst.is_multicast == False:
# New place is a switch-to-switch port!
# Hopefully, this is a packet we're flooding because we didn't
# know the destination, and not because it's somehow not on a
# path that we expect it to be on.
# If spanning_tree is running, we might check that this port is
# on the spanning tree (it should be).
if packet.dst in mac_map:
# Unfortunately, we know the destination. It's possible that
# we learned it while it was in flight, but it's also possible
# that something has gone wrong.
if swdebug:
print "Hit MacMap"
log.warning("Packet from %s to known destination %s arrived "
"at %s.%i without flow", packet.src, packet.dst,
dpid_to_str(self.dpid), event.port)
if packet.dst.is_multicast:
log.debug("Flood multicast from %s", packet.src)
flood()
else:
if packet.dst not in mac_map:
log.debug("%s unknown -- flooding" % (packet.dst,))
flood()
else:
dest = mac_map[packet.dst]
if packet.type == ethernet.IP_TYPE:
ipv4_packet=packet.find("ipv4")
tos = ipv4_packet.tos
if packet.find("icmp"):
print "ICMP packet received"
print "Received ToS = ",tos
match=of.ofp_match.from_packet(packet)
self.install_path(dest[0], dest[1], match, event,tos)
def _handle_PacketIn(self, event):
def flood():
""" Floods the packet """
if self.is_holding_down:
log.warning("Not flooding -- holddown active")
msg = of.ofp_packet_out()
# OFPP_FLOOD is optional; some switches may need OFPP_ALL
msg.actions.append(of.ofp_action_output(port=of.OFPP_FLOOD))
msg.buffer_id = event.ofp.buffer_id
msg.in_port = event.port
self.connection.send(msg)
def drop():
# Kill the buffer
if event.ofp.buffer_id is not None:
msg = of.ofp_packet_out()
msg.buffer_id = event.ofp.buffer_id
event.ofp.buffer_id = None # Mark is dead
msg.in_port = event.port
self.connection.send(msg)
packet = event.parsed
loc = (self, event.port) # Place we saw this ethaddr
oldloc = mac_map.get(packet.src) # Place we last saw this ethaddr
################################################################ Handle LLDP Type ################################################################
if packet.effective_ethertype == packet.LLDP_TYPE:
drop()
return
##################################################################################################################################################
################################################################ Handle ARP Type ################################################################
if packet.type == ethernet.ARP_TYPE:
arppack = packet.find('arp')
if arppack.opcode == arp.REQUEST:
mac_map[packet.src] = loc # Learn position for ethaddr
log.debug("Learned %s at %s.%i", packet.src, loc[0], loc[1])
for switch in dpids:
if switch is self.dpid:
if swdebug:
print "Same switch"
continue
if swdebug:
print "Sending ARP REQ to", dpidToStr(switch)
action_out = [
of.ofp_action_output(port=port)
for port in host_ports[switch]
]
core.openflow.sendToDPID(
switch,
of.ofp_packet_out(data=packet.pack(),
action=action_out))
return
if arppack.opcode == arp.REPLY:
mac_map[packet.src] = loc
loc_dst = mac_map[packet.dst] # Learn position for ethaddr
if swdebug:
print "Send reply to DPID - ", str(
loc_dst[0]), "port -", loc_dst[1]
if swdebug:
print "Type - ", type(str(loc_dst[0]))
action_out = of.ofp_action_output(port=loc_dst[1])
core.openflow.sendToDPID(
strToDPID(str(loc_dst[0])),
of.ofp_packet_out(data=packet.pack(), action=action_out))
return
################################################################# Handle LAT Type ################################################################
if packet.effective_ethertype == LAT_TYPE:
"""
Handle incoming latency packets
"""
#print dpidToStr(event.dpid)
port = packet.src
[prevtime, port_mac, swdpdest, swdpsrc] = packet.payload.split(',')
prevtime = float(prevtime)
currtime = time.time()
#print "PrevTime = ", prevtime, " CurrTime = ", currtime
dest_dpid = dpidToStr(event.dpid)
if dest_dpid == swdpdest:
#print "DPID matched"
latency = round((((currtime - prevtime) * 1000) -
dpid_latency[strToDPID(swdpsrc)] -
dpid_latency[event.dpid]), 4)
#print "Latency =",latency
#swd = ports[dpidToStr(self.dpid)]
swd = ports[swdpsrc]
for k in swd:
if swd[k][4] == port_mac:
break
if latency >= 0:
if k in ports[swdpsrc]:
ports[swdpsrc][k][0] = latency
return
##################################################################################################################################################
if oldloc is None:
if packet.src.is_multicast == False:
mac_map[packet.src] = loc # Learn position for ethaddr
log.debug("Learned %s at %s.%i", packet.src, loc[0], loc[1])
elif oldloc != loc:
drop()
return
# ethaddr seen at different place!
if core.openflow_discovery.is_edge_port(loc[0].dpid, loc[1]):
# New place is another "plain" port (probably)
log.debug("%s moved from %s.%i to %s.%i?", packet.src,
dpid_to_str(oldloc[0].dpid), oldloc[1],
dpid_to_str(loc[0].dpid), loc[1])
if packet.src.is_multicast == False:
mac_map[packet.src] = loc # Learn position for ethaddr
log.debug("Learned %s at %s.%i", packet.src, loc[0],
loc[1])
elif packet.dst.is_multicast == False:
# New place is a switch-to-switch port!
# Hopefully, this is a packet we're flooding because we didn't
# know the destination, and not because it's somehow not on a
# path that we expect it to be on.
# If spanning_tree is running, we might check that this port is
# on the spanning tree (it should be).
if packet.dst in mac_map:
# Unfortunately, we know the destination. It's possible that
# we learned it while it was in flight, but it's also possible
# that something has gone wrong.
if swdebug:
print "Hit MacMap"
log.warning(
"Packet from %s to known destination %s arrived "
"at %s.%i without flow", packet.src, packet.dst,
dpid_to_str(self.dpid), event.port)
if packet.dst.is_multicast:
log.debug("Flood multicast from %s", packet.src)
flood()
else:
if packet.dst not in mac_map:
log.debug("%s unknown -- flooding" % (packet.dst, ))
flood()
else:
dest = mac_map[packet.dst]
if packet.type == ethernet.IP_TYPE:
ipv4_packet = packet.find("ipv4")
tos = ipv4_packet.tos
if packet.find("icmp"):
print "ICMP packet received"
print "Received ToS = ", tos
match = of.ofp_match.from_packet(packet)
self.install_path(dest[0], dest[1], match, event, tos)
