def _handle_ConnectionUp (event):
# Set up this switch.
# Turn on ability to specify table in flow_mods
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
# Clear second table
msg = nx.nx_flow_mod(command=of.OFPFC_DELETE, table_id = 1)
event.connection.send(msg)
# Learning rule in table 0
msg = nx.nx_flow_mod()
msg.table_id = 0
learn = nx.nx_action_learn(table_id=1,hard_timeout=10)
learn.spec.chain(
field=nx.NXM_OF_VLAN_TCI, n_bits=12).chain(
field=nx.NXM_OF_ETH_SRC, match=nx.NXM_OF_ETH_DST).chain(
field=nx.NXM_OF_IN_PORT, output=True)
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(1))
event.connection.send(msg)
# Fallthrough rule for table 1: flood
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1 # Low priority
msg.actions.append(of.ofp_action_output(port = of.OFPP_FLOOD))
event.connection.send(msg)
def broadcast_paths (self):
# tell all switches what ports to send out broadcast packets
self.MST = nx.minimum_spanning_tree(self.graph)
switches = {}
for edge in self.MST.edges(data=True):
#self.log.info(edge)
src = edge[0]
dst = edge[1]
if src in edge[2]['ports']:
src_outport = edge[2]['ports'][src]
if src in switches:
switches[src].append(src_outport)
else:
switches[src] = [src_outport]
if dst in edge[2]['ports']:
dst_outport = edge[2]['ports'][dst]
if dst in switches:
switches[dst].append(dst_outport)
else:
switches[dst] = [dst_outport]
for switch, ports in switches.items():
if 'dpid' not in self.graph.node[switch]:
continue
switch_dpid = self.graph.node[switch]['dpid']
core.openflow.sendToDPID(switch_dpid, nx_flow_mod_table_id())
out_actions = [ofp_action_output(port=p) for p in ports]
fm = ofp_flow_mod_table_id(
table_id = 0,
command = of01.OFPFC_MODIFY,
match = of01.ofp_match(dl_dst=ETHER_BROADCAST),
actions = out_actions)
core.openflow.sendToDPID(switch_dpid, fm.pack())
def _handle_openflow_ConnectionUp (self, e):
"""
Handle the case when your connection to a switch goes up
You can now control this switch.
"""
self.log.info("Switch [%s] has gone up", dpid_to_str(e.dpid))
e.connection.send(nx_flow_mod_table_id()) # Enables multiple tables
switch_name = self.graph.names[e.dpid]
if switch_name not in self.graph:
zombie = self.down_switches[switch_name]
self.graph.add_node(switch_name)
self.graph.node[switch_name] = zombie[0]
for edge in zombie[1]:
self.graph.add_edge(switch_name, edge)
self.graph.add_edge(edge, switch_name)
self.graph.edge[switch_name][edge] = zombie[1][edge]
self.graph.edge[edge][switch_name] = zombie[1][edge]
del self.down_switches[switch_name]
self.shortest_paths_to_switches()
self.broadcast_paths()
def _handle_ConnectionUp(self, event):
assert event.dpid not in self.switches
self.switches[event.dpid] = {}
self.switches[event.dpid]['connection'] = event.connection
self.switches[event.dpid]['ports'] = {}
if self.use_nx:
""" Enable nicira packet-ins (e.g., to get rule cookies) """
msg = nx.nx_packet_in_format()
self.switches[event.dpid]['connection'].send(msg)
""" Enable multi-stage table with nicira extensions """
msg = nx.nx_flow_mod_table_id()
self.switches[event.dpid]['connection'].send(msg)
self.__nx_switch_pipeline_init(event.dpid, self.pipeline)
else:
msg = of.ofp_flow_mod(match = of.ofp_match())
msg.actions.append(of.ofp_action_output(port = of.OFPP_CONTROLLER))
self.switches[event.dpid]['connection'].send(msg)
self.send_to_pyretic(['switch','join',event.dpid,'BEGIN'])
# port type is ofp_phy_port
for port in event.ofp.ports:
if port.port_no <= of.OFPP_MAX:
self.switches[event.dpid]['ports'][port.port_no] = port.hw_addr
CONF_UP = not 'OFPPC_PORT_DOWN' in self.active_ofp_port_config(port.config)
STAT_UP = not 'OFPPS_LINK_DOWN' in self.active_ofp_port_state(port.state)
PORT_TYPE = self.active_ofp_port_features(port.curr)
self.send_to_pyretic(['port','join',event.dpid, port.port_no, CONF_UP, STAT_UP, PORT_TYPE])
self.send_to_pyretic(['switch','join',event.dpid,'END'])
def shortest_paths_to_switches (self):
# tell all switches what their next hop is to all other switches (for shortest paths)
all_paths = nx.shortest_path(self.graph)
for src, paths in all_paths.items():
if 'dpid' not in self.graph.node[src]:
continue
src_dpid = self.graph.node[src]['dpid']
if core.openflow.getConnection(src_dpid):
core.openflow.sendToDPID(src_dpid, nx_flow_mod_table_id()) # Enables multiple tables
data = []
for dst, path in paths.items():
if dst == src:
continue
if 'dpid' not in self.graph.node[dst]:
continue
dst_dpid = self.graph.node[dst]['dpid']
#self.log.info(str(src_dpid) + ' --> ' + str(dst_dpid) + ' : ' + str(path))
next_hop = path[1]
shortest_path_port = self.graph[src][next_hop]['ports'][src]
fm = ofp_flow_mod_table_id(
table_id = 0,
command = of01.OFPFC_MODIFY,
match = of01.ofp_match(dl_vlan=dst_dpid),
actions = [ofp_action_output(port=shortest_path_port)])
data.append(fm.pack())
core.openflow.sendToDPID(src_dpid, b''.join(data))
def _handle_ConnectionUp(self, event):
assert event.dpid not in self.switches
self.switches[event.dpid] = {}
self.switches[event.dpid]['connection'] = event.connection
self.switches[event.dpid]['ports'] = {}
if self.use_nx:
""" Enable nicira packet-ins (e.g., to get rule cookies) """
msg = nx.nx_packet_in_format()
self.switches[event.dpid]['connection'].send(msg)
""" Enable multi-stage table with nicira extensions """
msg = nx.nx_flow_mod_table_id()
self.switches[event.dpid]['connection'].send(msg)
self.__nx_switch_pipeline_init(event.dpid, self.pipeline)
else:
msg = of.ofp_flow_mod(match = of.ofp_match())
msg.actions.append(of.ofp_action_output(port = of.OFPP_CONTROLLER))
self.switches[event.dpid]['connection'].send(msg)
self.send_to_pyretic(['switch','join',event.dpid,'BEGIN'])
# port type is ofp_phy_port
for port in event.ofp.ports:
if port.port_no <= of.OFPP_MAX:
self.switches[event.dpid]['ports'][port.port_no] = port.hw_addr
CONF_UP = not 'OFPPC_PORT_DOWN' in self.active_ofp_port_config(port.config)
STAT_UP = not 'OFPPS_LINK_DOWN' in self.active_ofp_port_state(port.state)
PORT_TYPE = self.active_ofp_port_features(port.curr)
self.send_to_pyretic(['port','join',event.dpid, port.port_no, CONF_UP, STAT_UP, PORT_TYPE])
self.send_to_pyretic(['switch','join',event.dpid,'END'])
def _handle_ConnectionUp(event):
# Set up this switch.
# Turn on ability to specify table in flow_mods
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
# Clear second table
msg = nx.nx_flow_mod(command=of.OFPFC_DELETE, table_id=1)
event.connection.send(msg)
# Learning rule in table 0
msg = nx.nx_flow_mod()
msg.table_id = 0
learn = nx.nx_action_learn(table_id=1, hard_timeout=10)
learn.spec.chain(field=nx.NXM_OF_VLAN_TCI,
n_bits=12).chain(field=nx.NXM_OF_ETH_SRC,
match=nx.NXM_OF_ETH_DST).chain(
field=nx.NXM_OF_IN_PORT, output=True)
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(1))
event.connection.send(msg)
# Fallthrough rule for table 1: flood
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1 # Low priority
msg.actions.append(of.ofp_action_output(port=of.OFPP_FLOOD))
event.connection.send(msg)
def _handle_openflow_ConnectionUp(self, event):
if event.dpid != self.dpid: return
self.log.info("Switch connected")
self._conn.send(ovs.nx_flow_mod_table_id())
self._conn.send(ovs.nx_packet_in_format())
self._init_tables()
self._refresh_ports()
self._invalidate()
def _handle_ConnectionUp(self, event):
msg = nx.nx_packet_in_format()
event.connection.send(msg)
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
msg = nx.nx_flow_mod(command=of.OFPFC_DELETE)
msg.table_id = 1
event.connection.send(msg)
def _handle_ConnectionUp(self, event):
msg = nx.nx_packet_in_format()
event.connection.send(msg)
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
msg = nx.nx_flow_mod(command = of.OFPFC_DELETE)
msg.table_id = 1
event.connection.send(msg)
def _handle_ConnectionUp (event):
#When a switch connects, create a new node in graph
global num_switches
global g
num_switches += 1
g[event.dpid] = [ [-1,-1] for i in range(num_pods)]
all_switches.add(event.dpid)
# Turn on ability to specify table in flow_mods
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
def _handle_ViroSwitchUp(self, event):
""" Local VIRO switch is connecting to the local controller
We set the controller Id to our local VIRO controller """
log.debug("Connection %s %s" %
(event.connection, dpidToStr(event.dpid)))
self.sw.dpid = event.dpid
self.sw.connection = event.connection
self.routing.dpid = event.dpid
self.routing.routingTable.dpid = event.dpid
# Guobao added 02/05/2015
#self.previousRoutingTable = copy.deepcopy(self.routing.routingTable)
self.previousRoutingTable = RoutingTable(None, None)
# Turn on ability to specify table in flow_mods
msg = nx.nx_flow_mod_table_id()
self.sw.connection.send(msg)
msg = msgFactory.ofpControllerId(LocalViro.CONTROLLER_ID)
self.sw.connection.send(msg)
msg = msgFactory.ctrlPktsLocalViroPacketIn(
LocalViro.CONTROLLER_ID) # set the rule for Viro Packets
self.sw.connection.send(msg)
msg_ip = msgFactory.IPv4LocalViroPacketIn(
LocalViro.CONTROLLER_ID) # set the rule for IP Packets
self.sw.connection.send(msg_ip)
# Guobao -- Fallback rule for Table 0
msg = msgFactory.FallBack(1)
self.sw.connection.send(msg)
# Start periodic function of the local controller
# 1. Neighbor discovery
# 2. Routing table rounds
# 3. Failure discovery
# We don't use recurring timers to avoid function call overlaps in case of delays
# So, we call the timer function after the end of the callback function
Timer(LocalViro.DISCOVER_TIME, self.neibghoorDiscoverCallback)
#Timer(LocalViro.FAILURE_TIME, self.discoveryFailureCallback) # comment here
self.round = 1
Timer(LocalViro.UPDATE_RT_TIME, self.startRoundCallback)
# Sync RT Table every UPDATE_RT_TIME?
Timer(LocalViro.UPDATE_RT_TIME, self.pushRTHelper)
def __init__(self, connection):
topo = TopologyManager()
self.connection = connection
connection.addListeners(self)
l = {}
print(topo.switches)
if (connection.eth_addr.toStr() in topo.switches):
print("Connected")
for k, v in topo.links.items():
if connection.eth_addr.toStr() in v:
i = 1
for k, v in l.items():
print('Installing rule for link', k, 'table', i)
msg = nx.nx_flow_mod_table_id()
connection.send(msg)
# table 0
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.of_in_port = v[0]
msg.actions.append(
nx.nx_action_resubmit.resubmit_table(table=0))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1000
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.nx_ipv6_dst = (IPAddr6("::2"),
IPAddr6("::2"))
msg.actions.append(of.ofp_action_output(port=v[1]))
msg.actions.append(
nx.nx_action_resubmit.resubmit_table(table=0))
self.connection.send(msg)
if i != topo.links.__len__():
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.actions.append(
nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
i += 1
def _handle_ConnectionUp(event):
#When a switch connects, create a new node in graph
global num_switches
num_switches += 1
#g[event.dpid] = [ [-1,-1] for i in range(num_pods)]
g[event.dpid] = {}
switch_pos[event.dpid] = [-1, -1]
l = [port.port_no for port in event.ofp.ports]
if of.OFPP_LOCAL in l: #removing the openflow local port
l.remove(of.OFPP_LOCAL)
total_ports[event.dpid] = len(l)
ports[event.dpid] = l
all_switches.add(event.dpid)
# Turn on ability to specify table in flow_mods
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
def _handle_ConnectionUp (event):
#When a switch connects, create a new node in graph
global num_switches
num_switches += 1
#g[event.dpid] = [ [-1,-1] for i in range(num_pods)]
g[event.dpid] = {}
switch_pos[event.dpid] = [-1, -1]
l = [port.port_no for port in event.ofp.ports]
if of.OFPP_LOCAL in l: #removing the openflow local port
l.remove(of.OFPP_LOCAL)
total_ports[event.dpid] = len(l)
ports[event.dpid] = l
all_switches.add(event.dpid)
# Turn on ability to specify table in flow_mods
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
def _handle_ConnectionUp (event):
# Set up this switch.
# After setting up, we send a barrier and wait for the response
# before starting to listen to packet_ins for this switch -- before
# the switch is set up, the packet_ins may not be what we expect,
# and our responses may not work!
# Turn on Nicira packet_ins
msg = nx.nx_packet_in_format()
event.connection.send(msg)
# Turn on ability to specify table in flow_mods
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
# Clear second table
msg = nx.nx_flow_mod(command=of.OFPFC_DELETE, table_id = 1)
event.connection.send(msg)
# Fallthrough rule for table 0: flood and send to controller
msg = nx.nx_flow_mod()
msg.priority = 1 # Low priority
msg.actions.append(of.ofp_action_output(port = of.OFPP_CONTROLLER))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 1))
event.connection.send(msg)
# Fallthrough rule for table 1: flood
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.actions.append(of.ofp_action_output(port = of.OFPP_FLOOD))
event.connection.send(msg)
def ready (event):
if event.ofp.xid != 0x80000000:
# Not the right barrier
return
log.info("%s ready", event.connection)
event.connection.addListenerByName("PacketIn", _handle_PacketIn)
return EventRemove
event.connection.send(of.ofp_barrier_request(xid=0x80000000))
event.connection.addListenerByName("BarrierIn", ready)
def _handle_ConnectionUp(event):
# Set up this switch.
# After setting up, we send a barrier and wait for the response
# before starting to listen to packet_ins for this switch -- before
# the switch is set up, the packet_ins may not be what we expect,
# and our responses may not work!
# Turn on Nicira packet_ins
msg = nx.nx_packet_in_format()
event.connection.send(msg)
# Turn on ability to specify table in flow_mods
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
# Clear second table
msg = nx.nx_flow_mod(command=of.OFPFC_DELETE, table_id=1)
event.connection.send(msg)
# Fallthrough rule for table 0: flood and send to controller
msg = nx.nx_flow_mod()
msg.priority = 1 # Low priority
msg.actions.append(of.ofp_action_output(port=of.OFPP_CONTROLLER))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
event.connection.send(msg)
# Fallthrough rule for table 1: flood
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1 # Low priority
msg.actions.append(of.ofp_action_output(port=of.OFPP_FLOOD))
event.connection.send(msg)
def ready(event):
if event.ofp.xid != 0x80000000:
# Not the right barrier
return
log.info("%s ready", event.connection)
event.connection.addListenerByName("PacketIn", _handle_PacketIn)
return EventRemove
event.connection.send(of.ofp_barrier_request(xid=0x80000000))
event.connection.addListenerByName("BarrierIn", ready)
def _handle_ConnectionUp(event):
# Initialize the forwarding rules for this switch.
# After setting up, we send a barrier and wait for the response
# before starting to listen to packet_ins for this switch -- before
# the switch is set up, the packet_ins may not be what we expect,
# and our responses may not work!
connection = event.connection
dpid = connection.dpid
print "handle_ConnectionUP from dpid", dpid, util.dpid_to_str(dpid)
portlist = connection.ports.values()
# get port_no of each item in portlist
portlist = map(lambda x: x.port_no, portlist)
portlist = filter(lambda x: x < of.OFPP_MAX, portlist)
# Turn on Nicira packet_ins
msg = nx.nx_packet_in_format()
connection.send(msg)
# Turn on this switch's ability to specify tables in flow_mods
msg = nx.nx_flow_mod_table_id()
connection.send(msg)
# Clear first table
msg = nx.nx_flow_mod(command=of.OFPFC_DELETE, table_id=0)
connection.send(msg)
# Clear second table
msg = nx.nx_flow_mod(command=of.OFPFC_DELETE, table_id=1)
connection.send(msg)
# this version sets default flooding actions only for ICMP and ARP packets
# (though there IS a rule to send unknown packets to the controller)
# Default rule for table 0: flood (IF a flooder) and send to table 1
# Default rule for table 1: send to controller
# Default rule for table 0 starts here
msgi = nx.nx_flow_mod() # icmp msg
msga = nx.nx_flow_mod() # arp msg
msgi.table_id = msga.table_id = 0
msgi.priority = msga.priority = 1 # Low priority
msgi.idle_timeout = msga.idle_timeout = ICMP_IDLE_TIMEOUT
msgi.match.append(nx.NXM_OF_ETH_TYPE(pkt.ethernet.IP_TYPE))
msgi.match.append(nx.NXM_OF_IP_PROTO(pkt.ipv4.ICMP_PROTOCOL))
msga.match.append(nx.NXM_OF_ETH_TYPE(pkt.ethernet.ARP_TYPE))
if flooder(dpid):
msgi.actions.append(of.ofp_action_output(port=of.OFPP_FLOOD))
msga.actions.append(of.ofp_action_output(port=of.OFPP_FLOOD))
msgi.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
msga.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
connection.send(msgi)
connection.send(msga)
# Default rule for table 1: send to controller
msgi = nx.nx_flow_mod() # icmp msg
msga = nx.nx_flow_mod() # arp msg
msgi.table_id = msga.table_id = 1
msgi.priority = msga.priority = 1 # Low priority
msgi.idle_timeout = msga.idle_timeout = ICMP_IDLE_TIMEOUT
msgi.match.append(nx.NXM_OF_ETH_TYPE(pkt.ethernet.IP_TYPE))
msgi.match.append(nx.NXM_OF_IP_PROTO(pkt.ipv4.ICMP_PROTOCOL))
msga.match.append(nx.NXM_OF_ETH_TYPE(pkt.ethernet.ARP_TYPE))
msgi.actions.append(of.ofp_action_output(port=of.OFPP_CONTROLLER))
msga.actions.append(of.ofp_action_output(port=of.OFPP_CONTROLLER))
connection.send(msgi)
connection.send(msga)
if flooder(
dpid
): # create emtpy default action (applies mostly to TCP traffic)
msgdef = nx.nx_flow_mod()
msgdef.table_id = 0
msgdef.priority = 0 # pld: MUST HAVE THIS
msgdef.actions.append(of.ofp_action_output(port=of.OFPP_CONTROLLER))
connection.send(msgdef)
def ready(event): # called right below, as parameter
if event.ofp.xid != 0x80000000:
# Not the right barrier
return
log.info("%s ready", event.connection)
event.connection.addListenerByName("PacketIn", _handle_PacketIn)
return EventRemove
# the following is to ensure that the switch does nothing else until it processes the actions above
connection.send(of.ofp_barrier_request(xid=0x80000000))
connection.addListenerByName("BarrierIn", ready)
# now install switch
if dpid in switchmap:
sw = switchmap[dpid]
if sw.connection() is None:
sw.setConnection(connection)
else:
sw = SwitchNode(dpid, connection)
switchmap[dpid] = sw
# now add empty port list
sw.setUnknownPorts(portlist)
def __init__(self, connection):
self.connection = connection
connection.addListeners(self)
if (connection.eth_addr.toStr() == "00:00:00:00:00:01"):
print "Preparing of rules"
msg = nx.nx_flow_mod_table_id()
connection.send(msg)
#table 0
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.of_in_port = 1
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1000
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.nx_ipv6_dst = (IPAddr6("::1"), IPAddr6("::1"))
msg.actions.append(of.ofp_action_output(port=1))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
#table 1
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1000
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.nx_ipv6_dst = (IPAddr6("::2"), IPAddr6("::2"))
msg.actions.append(of.ofp_action_output(port=1))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.of_in_port = 2
self.connection.send(msg)
if (connection.eth_addr.toStr() == "00:00:00:00:00:02"):
print "Preparing of rules"
msg = nx.nx_flow_mod_table_id()
connection.send(msg)
#table 0
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.of_in_port = 1
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1000
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.nx_ipv6_dst = (IPAddr6("::2"), IPAddr6("::2"))
msg.actions.append(of.ofp_action_output(port=1))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
#table 1
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1000
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.nx_ipv6_dst = (IPAddr6("::4"), IPAddr6("::4"))
msg.actions.append(of.ofp_action_output(port=2))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.of_in_port = 2
self.connection.send(msg)
def _handle_ConnectionUp(self, event):
# Initialize Nicira
msg = nx.nx_flow_mod()
event.connection.send(msg)
# Signal Table use
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
#Table 1 -> TCP Table 2 -> ARP
for temp_table_id in range(1, 5):
msg = nx.nx_flow_mod(command=of.OFPFC_DELETE, table_id = temp_table_id)
event.connection.send(msg)
#Table 0 rule: Selection of tables
#IP Packet Handling / TCP
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.priority = 65000
msg.actions.append(nx.nx_multipath(dst = nx.NXM_NX_REG2))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 1))
event.connection.send(msg)
#ARP Packet Handling
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 65001
msg.match.eth_type = pkt.ethernet.ARP_TYPE
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 4))
event.connection.send(msg)
log.info("Table 0 done")
#Table 1 Rules
# TBD: State Machine and Hash value
# New flow function
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.priority = 65004
# Signifying New flow
msg.actions.append(nx.nx_reg_load(dst=nx.NXM_NX_REG0, value=0x0))
# currently learning based on eth address
# no hash
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 2))
event.connection.send(msg)
#Table 2 Rules
#1. Sync (Should be a Sync)
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.NXM_NX_REG0 = 0
msg.match.tcp_flags = 2
msg.priority = 65001
# learn function for table 1
learn = nx.nx_action_learn(table_id=1,priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(fms(load=nx.NXM_NX_REG0, src=nx.nx_learn_src_immediate.u32(None, 1)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True ))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
#2. Sync Ack (Should be after sync)
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x12
msg.priority = 65002
msg.match.NXM_NX_REG0 = 1
# learn function for table 1
learn = nx.nx_action_learn(table_id=1,priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(fms(load=nx.NXM_NX_REG0, src=nx.nx_learn_src_immediate.u32(None, 2)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True ))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
#3. Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x010
msg.priority = 65003
msg.match.NXM_NX_REG0 = 2
# learn function for table 1
learn = nx.nx_action_learn(table_id=1,priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(fms(load=nx.NXM_NX_REG0, src=nx.nx_learn_src_immediate.u32(None, 3)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True ))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
#4. Fin
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x010
msg.priority = 65003
msg.match.NXM_NX_REG0 = 3
# learn function for table 1
learn = nx.nx_action_learn(table_id=1,priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(fms(load=nx.NXM_NX_REG0, src=nx.nx_learn_src_immediate.u32(None, 4)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True ))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
#5. Fin-Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x010
msg.priority = 65003
msg.match.NXM_NX_REG0 = 4
# learn function for table 1
learn = nx.nx_action_learn(table_id=1,priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(fms(load=nx.NXM_NX_REG0, src=nx.nx_learn_src_immediate.u32(None, 5)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True ))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
#7. Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x010
msg.priority = 65003
msg.match.NXM_NX_REG0 = 5
# learn function for table 1
learn = nx.nx_action_learn(table_id=1,priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(fms(load=nx.NXM_NX_REG0, src=nx.nx_learn_src_immediate.u32(None, 6)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True ))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
#8. RST
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x14
msg.priority = 65003
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
#9. PSH-Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x18
msg.priority = 65003
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
#9. Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x10
msg.priority = 65003
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
#send to controller currently sending to the destination as no old state stored
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.priority = 64999
msg.actions.append(nx.nx_reg_load(dst=nx.NXM_NX_REG1, value=int(1)))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table = 3))
event.connection.send(msg)
log.info("Table 2 done")
#Table 3 Rules: Forward the packet to the Destination
msg = nx.nx_flow_mod()
msg.table_id = 3
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_dst = "10.0.0.1"
msg.priority = 65001
msg.actions.append(of.ofp_action_output(port = 1))
event.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 3
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_dst = "10.0.0.2"
msg.priority = 65001
msg.actions.append(of.ofp_action_output(port = 2))
event.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 3
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_dst = "10.0.0.3"
msg.priority = 65001
msg.actions.append(of.ofp_action_output(port = 3))
event.connection.send(msg)
#send to controller
msg = nx.nx_flow_mod()
msg.table_id = 3
msg.match.NXM_NX_REG1 = 1
msg.priority = 65005
msg.actions.append(of.ofp_action_output(port = of.OFPP_CONTROLLER))
event.connection.send(msg)
log.info("Table 3 done")
#Table 4 Rules
msg = nx.nx_flow_mod()
msg.table_id = 4
msg.actions.append(of.ofp_action_output(port = of.OFPP_FLOOD))
event.connection.send(msg)
log.info("Table 4 done")
def _handle_ConnectionUp(self, event):
# Initialize Nicira
msg = nx.nx_flow_mod()
event.connection.send(msg)
# Signal Table use
msg = nx.nx_flow_mod_table_id()
event.connection.send(msg)
#Table 1 -> TCP Table 2 -> ARP
for temp_table_id in range(1, 5):
msg = nx.nx_flow_mod(command=of.OFPFC_DELETE,
table_id=temp_table_id)
event.connection.send(msg)
#Table 0 rule: Selection of tables
#IP Packet Handling / TCP
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.priority = 65000
msg.actions.append(nx.nx_multipath(dst=nx.NXM_NX_REG2))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
event.connection.send(msg)
#ARP Packet Handling
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 65001
msg.match.eth_type = pkt.ethernet.ARP_TYPE
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=4))
event.connection.send(msg)
log.info("Table 0 done")
#Table 1 Rules
# TBD: State Machine and Hash value
# New flow function
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.priority = 65004
# Signifying New flow
msg.actions.append(nx.nx_reg_load(dst=nx.NXM_NX_REG0, value=0x0))
# currently learning based on eth address
# no hash
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=2))
event.connection.send(msg)
#Table 2 Rules
#1. Sync (Should be a Sync)
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.NXM_NX_REG0 = 0
msg.match.tcp_flags = 2
msg.priority = 65001
# learn function for table 1
learn = nx.nx_action_learn(table_id=1, priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(
fms(load=nx.NXM_NX_REG0,
src=nx.nx_learn_src_immediate.u32(None, 1)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
#2. Sync Ack (Should be after sync)
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x12
msg.priority = 65002
msg.match.NXM_NX_REG0 = 1
# learn function for table 1
learn = nx.nx_action_learn(table_id=1, priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(
fms(load=nx.NXM_NX_REG0,
src=nx.nx_learn_src_immediate.u32(None, 2)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
#3. Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x010
msg.priority = 65003
msg.match.NXM_NX_REG0 = 2
# learn function for table 1
learn = nx.nx_action_learn(table_id=1, priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(
fms(load=nx.NXM_NX_REG0,
src=nx.nx_learn_src_immediate.u32(None, 3)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
#4. Fin
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x010
msg.priority = 65003
msg.match.NXM_NX_REG0 = 3
# learn function for table 1
learn = nx.nx_action_learn(table_id=1, priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(
fms(load=nx.NXM_NX_REG0,
src=nx.nx_learn_src_immediate.u32(None, 4)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
#5. Fin-Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x010
msg.priority = 65003
msg.match.NXM_NX_REG0 = 4
# learn function for table 1
learn = nx.nx_action_learn(table_id=1, priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(
fms(load=nx.NXM_NX_REG0,
src=nx.nx_learn_src_immediate.u32(None, 5)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
#7. Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x010
msg.priority = 65003
msg.match.NXM_NX_REG0 = 5
# learn function for table 1
learn = nx.nx_action_learn(table_id=1, priority=65111)
learn.spec = [
nx.flow_mod_spec(src=nx.nx_learn_src_field(nx.NXM_NX_REG2),
dst=nx.nx_learn_dst_match(nx.NXM_NX_REG2)),
]
fms = nx.flow_mod_spec.new
learn.spec.append(
fms(load=nx.NXM_NX_REG0,
src=nx.nx_learn_src_immediate.u32(None, 6)))
learn.spec.append(fms(field=nx.NXM_NX_REG0, reserved=True))
msg.actions.append(learn)
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
#8. RST
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x14
msg.priority = 65003
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
#9. PSH-Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x18
msg.priority = 65003
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
#9. Ack
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_proto = ipv4.TCP_PROTOCOL
msg.match.tcp_flags = 0x10
msg.priority = 65003
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
#send to controller currently sending to the destination as no old state stored
msg = nx.nx_flow_mod()
msg.table_id = 2
msg.priority = 64999
msg.actions.append(nx.nx_reg_load(dst=nx.NXM_NX_REG1, value=int(1)))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=3))
event.connection.send(msg)
log.info("Table 2 done")
#Table 3 Rules: Forward the packet to the Destination
msg = nx.nx_flow_mod()
msg.table_id = 3
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_dst = "10.0.0.1"
msg.priority = 65001
msg.actions.append(of.ofp_action_output(port=1))
event.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 3
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_dst = "10.0.0.2"
msg.priority = 65001
msg.actions.append(of.ofp_action_output(port=2))
event.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 3
msg.match.eth_type = pkt.ethernet.IP_TYPE
msg.match.ip_dst = "10.0.0.3"
msg.priority = 65001
msg.actions.append(of.ofp_action_output(port=3))
event.connection.send(msg)
#send to controller
msg = nx.nx_flow_mod()
msg.table_id = 3
msg.match.NXM_NX_REG1 = 1
msg.priority = 65005
msg.actions.append(of.ofp_action_output(port=of.OFPP_CONTROLLER))
event.connection.send(msg)
log.info("Table 3 done")
#Table 4 Rules
msg = nx.nx_flow_mod()
msg.table_id = 4
msg.actions.append(of.ofp_action_output(port=of.OFPP_FLOOD))
event.connection.send(msg)
log.info("Table 4 done")
def set_hosts (self, host_data):
"""
Receive list of hosts
This gets called with a list of dictionaries that each contain information
about a host. Each time this is called, you get a complete list of all
current hosts. Each entry looks something like this:
{"ether" : "01:02:03:04:05:06", "ip" : "1.2.3.4",
"attached_switch" : dpid, "attached_port" : portno},
In a datacenter, you might get this kind of information from a Cloud
Management System. In our case, garnet's sync_hosts() sends us the list
of Host entities in the "emulated" network garnet is managing. We
receive it via the POX Messenger component and the messenger bot above.
"""
self.last_host_data = host_data
for host in host_data:
self.log.info("Got host: %s", " ".join("%s=%s" % kv
for kv in sorted(host.items())))
host_e = str(host['ether'])
switch_dpid = host['attached_switch']
switch_port = host['attached_port']
switch_name = self.graph.names[switch_dpid]
self.hosts[host_e] = switch_dpid
self.edge[switch_dpid] = switch_port
if host_e in self.graph:
self.graph.remove_node(host_e)
# alter table info on attached switch
# add host to networkX graph
attached_switch = self.graph.names[switch_dpid]
self.graph.add_edge(host_e, attached_switch)
self.graph.add_edge(attached_switch, host_e)
port_dict = {'ports': {attached_switch: switch_port}}
self.graph.edge[host_e][attached_switch] = port_dict
self.graph.edge[attached_switch][host_e] = port_dict
core.openflow.sendToDPID(switch_dpid, nx_flow_mod_table_id()) # Enables multiple tables
data = []
# construct command to remove VLAN and output to host
fm = ofp_flow_mod_table_id(
table_id = 0,
match = of01.ofp_match(dl_dst=EthAddr(host_e)),
command = of01.OFPFC_MODIFY,
actions = [ofp_action_strip_vlan(), ofp_action_output(port=switch_port)])
data.append(fm.pack())
for dst_host, dst_switch_dpid in self.hosts.items():
if dst_host == host_e:
continue
if not self._connection_is_permitted(host_e, dst_host):
# If we're not allowed to send to this host (or this host is not allowed to receive), tell our switch
# to drop all traffic going to this host.
self.log.info("MatchedDenyACE: src=%s dst=%s" % host_e, dst_host)
fm = ofp_flow_mod_table_id(
table_id = 0,
command = of01.OFPFC_MODIFY,
match = of01.ofp_match(dl_src=EthAddr(host_e), dl_dst=EthAddr(dst_host)),
actions = None)
data.append(fm.pack())
continue
dst_switch_name = self.graph.names[dst_switch_dpid]
#self.log.info(switch_name + ' ' + dst_switch_name)
if switch_name == dst_switch_name:
continue
try:
next_hop = nx.shortest_path(self.graph, source=switch_name, target=dst_switch_name)[1]
except:
continue
shortest_path_port = self.graph[switch_name][next_hop]['ports'][switch_name]
#self.log.info(str(host_e) + ' ' + str(dst_host))
#self.log.info(str(dst_switch_dpid) + ' ' + str(shortest_path_port))
# inform attached switch where other hosts are
fm = ofp_flow_mod_table_id(
table_id = 0,
command = of01.OFPFC_MODIFY,
match = of01.ofp_match(dl_src=EthAddr(host_e), dl_dst=EthAddr(dst_host)),
actions = [ofp_action_set_vlan_vid(vlan_vid=dst_switch_dpid), ofp_action_output(port=shortest_path_port)])
data.append(fm.pack())
core.openflow.sendToDPID(dst_switch_dpid, nx_flow_mod_table_id()) # Enables multiple tables
try:
next_hop = nx.shortest_path(self.graph, source=dst_switch_name, target=switch_name)[1]
except:
continue
shortest_path_port = self.graph[dst_switch_name][next_hop]['ports'][dst_switch_name]
# inform other attached switches where this host is
fm = ofp_flow_mod_table_id(
table_id = 0,
command = of01.OFPFC_MODIFY,
match = of01.ofp_match(dl_src=EthAddr(dst_host), dl_dst=EthAddr(host_e)),
actions = [ofp_action_set_vlan_vid(vlan_vid=switch_dpid), ofp_action_output(port=shortest_path_port)])
core.openflow.sendToDPID(dst_switch_dpid, fm.pack())
core.openflow.sendToDPID(switch_dpid, b''.join(data))
self.broadcast_paths()
def __init__(self, connection):
self.connection = connection
connection.addListeners(self)
if (connection.eth_addr.toStr() == "00:00:00:00:00:01"):
# Rules for switch s1 !
'''
Table id is a number for the the table of rules for each switch.
Priority is for overlapping matches. Higher values are higher priority.
in_port - If using a buffer_id, this is the associated input port.
match - An ofp_match object. By default, this matches everything,
so you should probably set some of its fields!
'''
print "Preparing of rules"
msg = nx.nx_flow_mod_table_id()
connection.send(msg)
#table 0 - Rules for IP :01
'''
Forward a packet to source if the port that is coming is the same as the input
'''
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.of_in_port = 1
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
'''
When a message comes to the Switch if has a rule for this IPv6
forward it to next port
'''
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1000
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.nx_ipv6_dst = (IPAddr6("::1"), IPAddr6("::1"))
msg.actions.append(of.ofp_action_output(port=1))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
'''
If you have no rule for this IP check
table 1 for IP :02
'''
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
#table 1 - Rules for IP :02
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1000
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.nx_ipv6_dst = (IPAddr6("::2"), IPAddr6("::2"))
msg.actions.append(of.ofp_action_output(port=1))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.of_in_port = 2
self.connection.send(msg)
if (connection.eth_addr.toStr() == "00:00:00:00:00:02"):
# Rules for switch s2 !
print "Preparing of rules"
'''
The same Rules also for Switch 2 check the above comments..
'''
msg = nx.nx_flow_mod_table_id()
connection.send(msg)
#table 0
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.of_in_port = 1
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 1000
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.nx_ipv6_dst = (IPAddr6("::2"), IPAddr6("::2"))
msg.actions.append(of.ofp_action_output(port=1))
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 0
msg.priority = 500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.actions.append(nx.nx_action_resubmit.resubmit_table(table=1))
self.connection.send(msg)
#table 1
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1000
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.nx_ipv6_dst = (IPAddr6("::4"), IPAddr6("::4"))
msg.actions.append(of.ofp_action_output(port=2))
self.connection.send(msg)
msg = nx.nx_flow_mod()
msg.table_id = 1
msg.priority = 1500
msg.match.of_eth_dst = "00:00:00:00:00:00"
msg.match.of_eth_type = 0x86dd
msg.match.of_in_port = 2
self.connection.send(msg)
