def __init__(self, dpid):
if not dpid:
raise AssertionError("OpenFlowSwitch should have dpid")
Switch.__init__(self, id=dpid)
EventMixin.__init__(self)
self.dpid = dpid
self.ports = {}
self.flow_table = NOMFlowTable(self)
self.capabilities = 0
self._connection = None
self._listeners = []
self._reconnectTimeout = None # Timer for reconnection
self.xid_generator = xid_generator(((dpid & 0x7FFF) << 16) + 1)
def __init__ (self, dpid=None, **kw):
Switch.__init__(self)#, id=dpid)
EventMixin.__init__(self)
self.dpid = dpid
#self.ports = {}
self.flow_table = NOMFlowTable(self)
self.capabilities = 0
self._connection = None
self._listeners = []
self._reconnectTimeout = None # Timer for reconnection
self._xid_generator = xid_generator( ((self.dpid & 0x7FFF) << 16) + 1)
def __init__ (self, dpid):
if not dpid:
raise AssertionError("OpenFlowSwitch should have dpid")
Switch.__init__(self, id=dpid)
EventMixin.__init__(self)
self.dpid = dpid
self.ports = {}
self.flow_table = NOMFlowTable(self)
self.capabilities = 0
self._connection = None
self._listeners = []
self._reconnectTimeout = None # Timer for reconnection
self.xid_generator = xid_generator( ((dpid & 0x7FFF) << 16) + 1)
class OpenFlowSwitch (EventMixin, Switch):
"""
OpenFlowSwitches are Topology entities (inheriting from topology.Switch)
OpenFlowSwitches are persistent; that is, if a switch reconnects, the
Connection field of the original OpenFlowSwitch object will simply be
reset to refer to the new connection.
For now, OpenFlowSwitch is primarily a proxy to its underlying connection
object. Later, we'll possibly add more explicit operations the client can
perform.
Note that for the purposes of the debugger, we can interpose on
a switch entity by enumerating all listeners for the events listed
below, and triggering mock events for those listeners.
"""
_eventMixin_events = set([
SwitchJoin, # Defined in pox.topology
SwitchLeave,
SwitchConnectionUp,
SwitchConnectionDown,
PortStatus, # Defined in libopenflow_01
FlowRemoved,
PacketIn,
BarrierIn,
])
def __init__ (self, dpid):
if not dpid:
raise AssertionError("OpenFlowSwitch should have dpid")
Switch.__init__(self, id=dpid)
EventMixin.__init__(self)
self.dpid = dpid
self.ports = {}
self.flow_table = NOMFlowTable(self)
self.capabilities = 0
self._connection = None
self._listeners = []
self._reconnectTimeout = None # Timer for reconnection
self.xid_generator = xid_generator( ((dpid & 0x7FFF) << 16) + 1)
def _setConnection (self, connection, ofp=None):
''' ofp - a FeaturesReply message '''
if self._connection: self._connection.removeListeners(self._listeners)
self._listeners = []
self._connection = connection
if self._reconnectTimeout is not None:
self._reconnectTimeout.cancel()
self._reconnectTimeout = None
if connection is None:
self._reconnectTimeout = Timer(RECONNECT_TIMEOUT,
self._timer_ReconnectTimeout)
if ofp is not None:
# update capabilities
self.capabilities = ofp.capabilities
# update all ports
untouched = set(self.ports.keys())
for p in ofp.ports:
if p.port_no in self.ports:
self.ports[p.port_no]._update(p)
untouched.remove(p.port_no)
else:
self.ports[p.port_no] = OpenFlowPort(p)
for p in untouched:
self.ports[p].exists = False
del self.ports[p]
if connection is not None:
self._listeners = self.listenTo(connection, prefix="con")
self.raiseEvent(SwitchConnectionUp(switch=self, connection = connection))
else:
self.raiseEvent(SwitchConnectionDown(switch=self))
def _timer_ReconnectTimeout (self):
""" Called if we've been disconnected for RECONNECT_TIMEOUT seconds """
self._reconnectTimeout = None
core.topology.removeEntity(self)
self.raiseEvent(SwitchLeave, self)
def _handle_con_PortStatus (self, event):
p = event.ofp.desc
if event.ofp.reason == of.OFPPR_DELETE:
if p.port_no in self.ports:
self.ports[p.port_no].exists = False
del self.ports[p.port_no]
elif event.ofp.reason == of.OFPPR_MODIFY:
self.ports[p.port_no]._update(p)
else:
assert event.ofp.reason == of.OFPPR_ADD
assert p.port_no not in self.ports
self.ports[p.port_no] = OpenFlowPort(p)
self.raiseEvent(event)
event.halt = False
def _handle_con_ConnectionDown (self, event):
self._setConnection(None)
def _handle_con_PacketIn (self, event):
self.raiseEvent(event)
event.halt = False
def _handle_con_BarrierIn (self, event):
self.raiseEvent(event)
event.halt = False
def _handle_con_FlowRemoved (self, event):
self.raiseEvent(event)
self.flowTable.removeFlow(event)
event.halt = False
def findPortForEntity (self, entity):
for p in self.ports.itervalues():
if entity in p:
return p
return None
@property
def connected(self):
return self._connection != None
def installFlow(self, **kw):
""" install a flow in the local flow table as well as into the associated switch """
self.flow_table.install(TableEntry(**kw))
def serialize (self):
# Skip over non-serializable data, e.g. sockets
serializable = OpenFlowSwitch(self.dpid)
return pickle.dumps(serializable, protocol = 0)
def send(self, *args, **kw):
return self._connection.send(*args, **kw)
def read(self, *args, **kw):
return self._connection.read(*args, **kw)
def __repr__ (self):
return "<%s %s>" % (self.__class__.__name__, dpidToStr(self.dpid))
@property
def name(self):
return repr(self)
class OpenFlowSwitch(EventMixin, Switch):
"""
OpenFlowSwitches are Topology entities (inheriting from topology.Switch)
OpenFlowSwitches are persistent; that is, if a switch reconnects, the
Connection field of the original OpenFlowSwitch object will simply be
reset to refer to the new connection.
For now, OpenFlowSwitch is primarily a proxy to its underlying connection
object. Later, we'll possibly add more explicit operations the client can
perform.
Note that for the purposes of the debugger, we can interpose on
a switch entity by enumerating all listeners for the events listed
below, and triggering mock events for those listeners.
"""
_eventMixin_events = set([
SwitchJoin, # Defined in pox.topology
SwitchLeave,
SwitchConnectionUp,
SwitchConnectionDown,
PortStatus, # Defined in libopenflow_01
FlowRemoved,
PacketIn,
BarrierIn,
])
def __init__(self, dpid):
if not dpid:
raise AssertionError("OpenFlowSwitch should have dpid")
Switch.__init__(self, id=dpid)
EventMixin.__init__(self)
self.dpid = dpid
self.ports = {}
self.flow_table = NOMFlowTable(self)
self.capabilities = 0
self._connection = None
self._listeners = []
self._reconnectTimeout = None # Timer for reconnection
self.xid_generator = xid_generator(((dpid & 0x7FFF) << 16) + 1)
def _setConnection(self, connection, ofp=None):
''' ofp - a FeaturesReply message '''
if self._connection: self._connection.removeListeners(self._listeners)
self._listeners = []
self._connection = connection
if self._reconnectTimeout is not None:
self._reconnectTimeout.cancel()
self._reconnectTimeout = None
if connection is None:
self._reconnectTimeout = Timer(RECONNECT_TIMEOUT,
self._timer_ReconnectTimeout)
if ofp is not None:
# update capabilities
self.capabilities = ofp.capabilities
# update all ports
untouched = set(self.ports.keys())
for p in ofp.ports:
if p.port_no in self.ports:
self.ports[p.port_no]._update(p)
untouched.remove(p.port_no)
else:
self.ports[p.port_no] = OpenFlowPort(p)
for p in untouched:
self.ports[p].exists = False
del self.ports[p]
if connection is not None:
self._listeners = self.listenTo(connection, prefix="con")
self.raiseEvent(
SwitchConnectionUp(switch=self, connection=connection))
else:
self.raiseEvent(SwitchConnectionDown(switch=self))
def _timer_ReconnectTimeout(self):
""" Called if we've been disconnected for RECONNECT_TIMEOUT seconds """
self._reconnectTimeout = None
core.topology.removeEntity(self)
self.raiseEvent(SwitchLeave, self)
def _handle_con_PortStatus(self, event):
p = event.ofp.desc
if event.ofp.reason == of.OFPPR_DELETE:
if p.port_no in self.ports:
self.ports[p.port_no].exists = False
del self.ports[p.port_no]
elif event.ofp.reason == of.OFPPR_MODIFY:
self.ports[p.port_no]._update(p)
else:
assert event.ofp.reason == of.OFPPR_ADD
assert p.port_no not in self.ports
self.ports[p.port_no] = OpenFlowPort(p)
self.raiseEvent(event)
event.halt = False
def _handle_con_ConnectionDown(self, event):
self._setConnection(None)
def _handle_con_PacketIn(self, event):
self.raiseEvent(event)
event.halt = False
def _handle_con_BarrierIn(self, event):
self.raiseEvent(event)
event.halt = False
def _handle_con_FlowRemoved(self, event):
self.raiseEvent(event)
self.flowTable.removeFlow(event)
event.halt = False
def findPortForEntity(self, entity):
for p in self.ports.itervalues():
if entity in p:
return p
return None
@property
def connected(self):
return self._connection != None
def installFlow(self, **kw):
""" install a flow in the local flow table as well as into the associated switch """
self.flow_table.install(TableEntry(**kw))
def serialize(self):
# Skip over non-serializable data, e.g. sockets
serializable = OpenFlowSwitch(self.dpid)
return pickle.dumps(serializable, protocol=0)
def send(self, *args, **kw):
return self._connection.send(*args, **kw)
def read(self, *args, **kw):
return self._connection.read(*args, **kw)
def __repr__(self):
return "<%s %s>" % (self.__class__.__name__, dpidToStr(self.dpid))
@property
def name(self):
return repr(self)
