def ipdstrw_and_forward(self, dpid, inport, packet, buf, bufid):
logger.info('IPDBF:[' + str(buf) + ']{' + str(packet) + '}\n')
buf[30] = 10
buf[31] = 0
buf[32] = 0
buf[33] = 3
packet.next.dstip = ipstr_to_int('10.0.0.3')
IPHeaderChecksum = (packet.next).checksum()
buf[24] = IPHeaderChecksum >> 8
buf[25] = IPHeaderChecksum & 0xFF
logger.info('Checksum: ' + str(IPHeaderChecksum) + '\n')
logger.info('IPDAF:[' + str(buf) + ']{' + str(packet) + '}\n')
# push down flow entry
flow = {}
flow[DL_TYPE] = 0x0800
flow[NW_DST] = ipstr_to_int('10.0.0.5')
actions = [
[openflow.OFPAT_SET_NW_DST, ipstr_to_int('10.0.0.3')],
[openflow.OFPAT_OUTPUT, [0, 1]]
]
CACHE_TIMEOUT = 100
self.install_datapath_flow(dpid, flow, CACHE_TIMEOUT,
openflow.OFP_FLOW_PERMANENT, actions,
None, openflow.OFP_DEFAULT_PRIORITY,
inport, None)
def get_forwarding_srcrule(srcIP, srcMAC, dstMAC, dstIP, outport):
flow = {}
flow[DL_TYPE] = 0x0800
flow[NW_DST] = ipstr_to_int(srcIP)
defaultActions = [
[openflow.OFPAT_OUTPUT, [0, outport]]
]
rewriteActions = [
[openflow.OFPAT_SET_DL_SRC, dstMAC],
[openflow.OFPAT_SET_NW_SRC, ipstr_to_int(dstIP)],
[openflow.OFPAT_SET_DL_DST, octstr_to_array(srcMAC)],
[openflow.OFPAT_OUTPUT, [0, outport]]
]
return (flow, defaultActions, rewriteActions)
def packet_in_callback(self, dpid, inport, reason, len, bufid, packet):
if packet.type == Globals.ARP_TYPE:
# ARP Response from replicas for our ARP Requests
if packet.dst == octstr_to_array(Globals.VMAC):
self.foundMac(dpid, mac_to_str(packet.src), ip_to_str(packet.next.protosrc), inport)
# Request for VIP, respond with ARP Response
elif packet.next.protodst == ipstr_to_int(Globals.VIP):
Globals.STATSLOG.write(mac_to_str(dpid) + ' received ' + ip_to_str(packet.next.protosrc) + '\n')
srcIP = ip_to_str(packet.next.protosrc)
# Install Rewrite Rules
(flow, defaultActions, rewriteActions) = IPs.get_forwarding_srcrule(srcIP, mac_to_str(packet.src), Globals.VMAC, Globals.VIP, inport)
Multipath.install_microflow_flow(flow, openflow.OFP_FLOW_PERMANENT, openflow.OFP_FLOW_PERMANENT, defaultActions, None, openflow.OFP_DEFAULT_PRIORITY + 20, 0, None, dpid, inport, rewriteActions)
# Response
arpResponse = Arps.create_virtual_arp_response(packet, octstr_to_array(Globals.VMAC), ipstr_to_int(Globals.VIP))
Multipath.send(dpid, None, arpResponse, [[openflow.OFPAT_OUTPUT, [0, inport]]], openflow.OFPP_CONTROLLER)
ip = ip_to_str(packet.next.protosrc)
for i, switchJ in enumerate(Globals.SWITCHES):
if switchJ['mac'] == dpid:
found = False
for i, client in enumerate(switchJ['clients']):
if client['ip'] == ip:
found = True
if not found:
Globals.STATSLOG.write(mac_to_str(dpid) + ' found ' + ip + '\n')
switchJ['clients'].append({'port': inport, 'ip': ip, 'oldCount': 0L, 'newCount': 0L, 'avg': 0L})
elif packet.src != octstr_to_array(Globals.VMAC):
Globals.STATSLOG.write(mac_to_str(dpid) + ' received REQ ' + ip_to_str(packet.next.protosrc) + '\n')
arpResponse = Arps.create_arp_response(packet)
Multipath.send(dpid, None, arpResponse, [[openflow.OFPAT_OUTPUT, [0, inport]]], openflow.OFPP_CONTROLLER)
elif packet.type == Globals.IP_TYPE:
if reason == openflow.OFPR_ACTION:
IPTransition.handleControllerAction(packet)
def get_forwarding_dstrule(srcIP, srcWild, gateIP, dstMAC, dstIP, outport):
flow = {}
flow[DL_TYPE] = 0x0800
flow[NW_SRC] = srcIP
flow[NW_SRC_N_WILD] = srcWild
flow[NW_DST] = ipstr_to_int(gateIP)
defaultActions = [
[openflow.OFPAT_OUTPUT, [0, outport]]
]
rewriteActions = [
[openflow.OFPAT_SET_DL_DST, dstMAC],
[openflow.OFPAT_SET_NW_DST, ipstr_to_int(dstIP)],
[openflow.OFPAT_OUTPUT, [0, outport]]
]
return (flow, defaultActions, rewriteActions)
def arpRequestReplicas(self): for i in range(0, Globals.NUMREPLICAS): if Globals.REPLICAS[i]['mac'] == '': arpRequest = Arps.create_arp_request(octstr_to_array(Globals.VMAC), ipstr_to_int(Globals.VIP), ipstr_to_int(Globals.REPLICAS[i]['ip'])) self.Multipath.flood(None, arpRequest, openflow.OFPP_FLOOD, openflow.OFPP_CONTROLLER) self.post_callback(5, self.arpRequestReplicas)
def get_controller_dstrule(srcIP, srcWild, gateIP):
flow = {}
flow[DL_TYPE] = 0x0800
flow[NW_SRC] = srcIP
flow[NW_SRC_N_WILD] = srcWild
flow[NW_DST] = ipstr_to_int(gateIP)
actions = [
[openflow.OFPAT_OUTPUT, [0, openflow.OFPP_CONTROLLER]]
]
return (flow, actions, actions)
def actionDeleteRule(rule):
Globals.INSTALLLOG.write("***Removing Rule: " + str(rule) + '\n')
for i in range(0, Globals.NUMREPLICAS):
if Globals.REPLICAS[i]['no'] == rule['replica']:
(flow, defaultActions,
rewriteActions) = IPs.get_forwarding_dstrule(
ipstr_to_int(rule['ip']), rule['wild'], Globals.VIP,
Globals.REPLICAS[i]['mac'], Globals.REPLICAS[i]['ip'],
Globals.REPLICAS[i]['port'])
Multipath.delete_flow(flow, rule['replica'])
def find_host_by_ipstr(self, nw_str):
nw = ipstr_to_int(nw_str)
info = {}
for dp1, inport, dladdr,nwaddr,name in self.adjacency_hosts:
if nwaddr == nw:
info['dp'] = dp1
info['port'] = inport
info['dl_addr'] = dladdr
return info
return None
def actionTransitionRule(rule):
Globals.INSTALLLOG.write("***Transition Rule: " + str(rule) + '\n')
(flow, defaultActions,
rewriteActions) = IPs.get_controller_dstrule(ipstr_to_int(rule['ip']),
rule['wild'], Globals.VIP)
Multipath.install_controller_flow(flow, openflow.OFP_FLOW_PERMANENT,
openflow.OFP_FLOW_PERMANENT,
defaultActions, None,
openflow.OFP_DEFAULT_PRIORITY, 0, None,
rule['replica'], rewriteActions)
Globals.COMPONENT.post_callback(Globals.HARD_TIMEOUT,
lambda: hardTimeoutHandler(rule))
def ipsrcrw_and_forward(self, dpid, inport, packet, buf, bufid):
logger.info('IPSBF:[' + str(buf) + ']{' + str(packet) + '}\n')
buf[26] = 10
buf[27] = 0
buf[28] = 0
buf[29] = 5
packet.next.srcip = ipstr_to_int('10.0.0.5')
IPHeaderChecksum = (packet.next).checksum()
buf[24] = IPHeaderChecksum >> 8
buf[25] = IPHeaderChecksum & 0xFF
logger.info('ChecksuM: ' + str(IPHeaderChecksum) + '\n')
logger.info('IPSAF:[' + str(buf) + ']{' + str(packet) + '}\n')
self.send_openflow(dpid, None, buf, 0, inport)
def ipsrcrw_and_forward(self, dpid, inport, packet, buf, bufid):
logger.info('IPSBF:[' + str(buf) + ']{' + str(packet) + '}\n')
buf[26] = 10
buf[27] = 0
buf[28] = 0
buf[29] = 5
packet.next.srcip = ipstr_to_int('10.0.0.5')
IPHeaderChecksum = (packet.next).checksum()
buf[24] = IPHeaderChecksum >> 8
buf[25] = IPHeaderChecksum & 0xFF
logger.info('ChecksuM: ' + str(IPHeaderChecksum) + '\n')
logger.info('IPSAF:[' + str(buf) + ']{' + str(packet) + '}\n')
self.send_openflow(dpid, None, buf, 0, inport)
def ipdstrw_and_forward(self, dpid, inport, packet, buf, bufid):
logger.info('IPDBF:[' + str(buf) + ']{' + str(packet) + '}\n')
buf[30] = 10
buf[31] = 0
buf[32] = 0
buf[33] = 3
packet.next.dstip = ipstr_to_int('10.0.0.3')
IPHeaderChecksum = (packet.next).checksum()
buf[24] = IPHeaderChecksum >> 8
buf[25] = IPHeaderChecksum & 0xFF
logger.info('Checksum: ' + str(IPHeaderChecksum) + '\n')
logger.info('IPDAF:[' + str(buf) + ']{' + str(packet) + '}\n')
# push down flow entry
flow = {}
flow[DL_TYPE] = 0x0800
flow[NW_DST] = ipstr_to_int('10.0.0.5')
actions = [[openflow.OFPAT_SET_NW_DST,
ipstr_to_int('10.0.0.3')], [openflow.OFPAT_OUTPUT, [0, 1]]]
CACHE_TIMEOUT = 100
self.install_datapath_flow(dpid, flow, CACHE_TIMEOUT,
openflow.OFP_FLOW_PERMANENT, actions, None,
openflow.OFP_DEFAULT_PRIORITY, inport, None)
def actionInstallRule(rule):
Globals.INSTALLLOG.write("***Installing Rule: " + str(rule) + '\n')
for i in range(0, Globals.NUMREPLICAS):
if Globals.REPLICAS[i]['no'] == rule['replica']:
(flow, defaultActions,
rewriteActions) = IPs.get_forwarding_dstrule(
ipstr_to_int(rule['ip']), rule['wild'], Globals.VIP,
Globals.REPLICAS[i]['mac'], Globals.REPLICAS[i]['ip'],
Globals.REPLICAS[i]['port'])
Multipath.install_replica_flow(flow, openflow.OFP_FLOW_PERMANENT,
openflow.OFP_FLOW_PERMANENT,
defaultActions, None,
openflow.OFP_DEFAULT_PRIORITY, 0,
None, rule['replica'],
rewriteActions)
def get_microflow_dstrule(packet, dstMAC, dstIP, outport):
currflow = extract_flow(packet)
flow = {}
flow[DL_TYPE] = 0x0800
flow[NW_SRC] = currflow[NW_SRC]
flow[NW_DST] = currflow[NW_DST]
defaultActions = [
[openflow.OFPAT_OUTPUT, [0, outport]]
]
rewriteActions = [
[openflow.OFPAT_SET_DL_DST, dstMAC],
[openflow.OFPAT_SET_NW_DST, ipstr_to_int(dstIP)],
[openflow.OFPAT_OUTPUT, [0, outport]]
]
return (flow, defaultActions, rewriteActions)
def foundMac(self, switchNum, mac, ip, inport):
for i in range(0, Globals.NUMREPLICAS):
if (ip == Globals.REPLICAS[i]['ip']) and Globals.REPLICAS[i]['mac'] == '':
Globals.REPLICAS[i]['mac'] = mac
Globals.REPLICAS[i]['port'] = inport
for j, switchJ in enumerate(Globals.SWITCHES):
if switchJ['mac'] == switchNum:
Globals.log.info('Discovered MAC of replica w/IP: ' + ip + ' at switch # ' + str(switchJ['no']))
switchJ['replicas'].append(Globals.REPLICAS[i]['no'])
flow = {}
flow[DL_TYPE] = 0x0800
flow[NW_DST] = ipstr_to_int(ip)
actions = [[openflow.OFPAT_OUTPUT, [0, inport]]]
Globals.COMPONENT.install_datapath_flow(switchNum, flow, openflow.OFP_FLOW_PERMANENT, openflow.OFP_FLOW_PERMANENT, actions, None, openflow.OFP_DEFAULT_PRIORITY + 10, openflow.OFPP_CONTROLLER, None)
Globals.MACREPLICAUPDATE = True
def packet_in_callback(self, dpid, inport, reason, len, bufid, packet):
# Install initial setup forwarding rules
if self.Init == True:
self.post_callback(Globals.PORT_STATS_PERIOD, lambda : self.port_timer())
self.Init = False
# Controller Attention
if reason == openflow.OFPR_ACTION:
self.myIPTransition.controllerAction(packet)
# Incoming ARPs
elif packet.type == Globals.ARP_TYPE:
# Response to our ARP requests
# 1. Record MAC
# 2. Install appropriate IP Forwarding Rule: Change dest VIP to dest Replica i
if packet.dst == octstr_to_array(Globals.VMAC):
foundMacs = True
for i in range(0, Globals.NUMREPLICAS):
if ((packet.next.protosrc == ipstr_to_int(Globals.REPLICAS[i]['ip'])) and (Globals.REPLICAS[i]['mac'] != mac_to_str(packet.src))):
Globals.REPLICAS[i]['mac'] = mac_to_str(packet.src)
Globals.REPLICAS[i]['port'] = inport
for j, switchJ in enumerate(Globals.SWITCHES):
if switchJ['mac'] == dpid:
switchJ['replicas'].append(Globals.REPLICAS[i]['no'])
if (Globals.REPLICAS[i]['mac'] == ''):
foundMacs = False
if foundMacs == True and self.AllMacsFound == False:
Globals.log.info('REPLICAS ' + str(Globals.REPLICAS))
Globals.log.info('SWITCHES ' + str(Globals.SWITCHES))
Globals.log.info('\n')
Globals.log.info('>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>')
rulePairList = self.myEvalRules.updateAlphas()
self.myIPTransition.installRules(rulePairList)
Globals.log.info('<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<')
Globals.log.info('\n')
self.AllMacsFound = True
# Requests for VIP respond with ARP Response
elif packet.next.protodst == ipstr_to_int(Globals.VIP):
srcIP = ip_to_str(packet.next.protosrc)
# IP Rules
(flow, defaultActions, rewriteActions) = IPs.get_forwarding_srcrule(srcIP, mac_to_str(packet.src), Globals.VMAC, Globals.VIP, inport)
self.Multipath.install_microflow_flow(flow, openflow.OFP_FLOW_PERMANENT, openflow.OFP_FLOW_PERMANENT, defaultActions, None, openflow.OFP_DEFAULT_PRIORITY, 0, None, dpid, inport, rewriteActions)
arpResponse = Arps.create_virtual_arp_response(packet, octstr_to_array(Globals.VMAC), ipstr_to_int(Globals.VIP))
self.Multipath.send(dpid, None, arpResponse, [[openflow.OFPAT_OUTPUT, [0, inport]]], openflow.OFPP_CONTROLLER)
else:
arpResponse = Arps.create_arp_response(packet)
self.Multipath.send(dpid, None, arpResponse, [[openflow.OFPAT_OUTPUT, [0, inport]]], openflow.OFPP_CONTROLLER)
elif packet.type == Globals.IP_TYPE:
Globals.log.info("Warning! S1 SHOULD NOT BE RECEIVING IP Traffic!!!")
# self.myIPTransition.controllerAction(packet)
return CONTINUE
def host_to_ip(hostid):
return ipstr_to_int("10.0.0." + str(hostid))
def actionDeleteRule(rule):
Globals.INSTALLLOG.write("***Removing Rule: " + str(rule) + '\n')
for i in range(0, Globals.NUMREPLICAS):
if Globals.REPLICAS[i]['no'] == rule['replica']:
(flow, defaultActions, rewriteActions) = IPs.get_forwarding_dstrule(ipstr_to_int(rule['ip']), rule['wild'], Globals.VIP, Globals.REPLICAS[i]['mac'], Globals.REPLICAS[i]['ip'], Globals.REPLICAS[i]['port'])
Multipath.delete_flow(flow, rule['replica'])
def actionTransitionRule(rule):
Globals.INSTALLLOG.write("***Transition Rule: " + str(rule) + '\n')
(flow, defaultActions, rewriteActions) = IPs.get_controller_dstrule(ipstr_to_int(rule['ip']), rule['wild'], Globals.VIP)
Multipath.install_controller_flow(flow, openflow.OFP_FLOW_PERMANENT, openflow.OFP_FLOW_PERMANENT, defaultActions, None, openflow.OFP_DEFAULT_PRIORITY, 0, None, rule['replica'], rewriteActions)
Globals.COMPONENT.post_callback(Globals.HARD_TIMEOUT, lambda : hardTimeoutHandler(rule))
def actionInstallRule(rule):
Globals.INSTALLLOG.write("***Installing Rule: " + str(rule) + '\n')
for i in range(0, Globals.NUMREPLICAS):
if Globals.REPLICAS[i]['no'] == rule['replica']:
(flow, defaultActions, rewriteActions) = IPs.get_forwarding_dstrule(ipstr_to_int(rule['ip']), rule['wild'], Globals.VIP, Globals.REPLICAS[i]['mac'], Globals.REPLICAS[i]['ip'], Globals.REPLICAS[i]['port'])
Multipath.install_replica_flow(flow, openflow.OFP_FLOW_PERMANENT, openflow.OFP_FLOW_PERMANENT, defaultActions, None, openflow.OFP_DEFAULT_PRIORITY, 0, None, rule['replica'], rewriteActions)
