import time
import uuid
-# TODO:
-# 1. ns-3 classes should be identified as ns3::clazzname?
-#
-
SINGLETON = "singleton::"
def load_ns3_module():
import ctypes
- import imp
import re
- import pkgutil
bindings = os.environ.get("NS3BINDINGS")
libdir = os.environ.get("NS3LIBRARIES")
if bindings:
sys.path.append(bindings)
+ import pkgutil
+ import imp
+ import ns
+
# create a module to add all ns3 classes
ns3mod = imp.new_module("ns3")
sys.modules["ns3"] = ns3mod
- # retrieve all ns3 classes and add them to the ns3 module
- import ns
-
for importer, modname, ispkg in pkgutil.iter_modules(ns.__path__):
fullmodname = "ns.%s" % modname
module = __import__(fullmodname, globals(), locals(), ['*'])
self._simulation_thread = None
self._condition = None
+ # XXX: Started should be global. There is no support for more than
+ # one simulator per process
self._started = False
# holds reference to all C++ objects and variables in the simulation
self._objects = dict()
- # holds the class identifiers of uuid to be able to retrieve
- # the corresponding ns3 TypeId to set/get attributes.
- # This is necessary because the method GetInstanceTypeId is not
- # exposed through the Python bindings
- self._tids = dict()
-
# create home dir (where all simulation related files will end up)
self._homedir = homedir or os.path.join("/", "tmp", "ns3_wrapper" )
formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')
hdlr.setFormatter(formatter)
- self._logger.addHandler(hdlr)
-
- # Python module to refernce all ns-3 classes and types
+ self._logger.addHandler(hdlr)
+
+ ## NOTE that the reason to create a handler to the ns3 module,
+ # that is re-loaded each time a ns-3 wrapper is instantiated,
+ # is that else each unit test for the ns3wrapper class would need
+ # a separate file. Several ns3wrappers would be created in the
+ # same unit test (single process), leading to inchorences in the
+ # state of ns-3 global objects
+ #
+ # Handler to ns3 classes
self._ns3 = None
-
+
+ # Collection of allowed ns3 classes
+ self._allowed_types = None
+
@property
def ns3(self):
if not self._ns3:
+ # load ns-3 libraries and bindings
self._ns3 = load_ns3_module()
return self._ns3
+ @property
+ def allowed_types(self):
+ if not self._allowed_types:
+ self._allowed_types = set()
+ type_id = self.ns3.TypeId()
+
+ tid_count = type_id.GetRegisteredN()
+ base = type_id.LookupByName("ns3::Object")
+
+ # Create a .py file using the ns-3 RM template for each ns-3 TypeId
+ for i in xrange(tid_count):
+ tid = type_id.GetRegistered(i)
+
+ if tid.MustHideFromDocumentation() or \
+ not tid.HasConstructor() or \
+ not tid.IsChildOf(base):
+ continue
+
+ type_name = tid.GetName()
+ self._allowed_types.add(type_name)
+
+ return self._allowed_types
+
@property
def homedir(self):
return self._homedir
@property
def is_running(self):
- return self._started and self._ns3 and not self.ns3.Simulator.IsFinished()
+ return self._started and self.ns3.Simulator.IsFinished()
def make_uuid(self):
return "uuid%s" % uuid.uuid4()
def get_object(self, uuid):
return self._objects.get(uuid)
- def get_typeid(self, uuid):
- return self._tids.get(uuid)
+ def factory(self, type_name, *kwargs):
+ if type_name not in allowed_types:
+ msg = "Type %s not supported" % (type_name)
+ self.logger.error(msg)
+
+ factory = self.ns3.ObjectFactory()
+ factory.SetTypeId(type_name)
+
+ for name, value in kwargs.iteritems():
+ ns3_value = self._attr_from_string_to_ns3_value(type_name, name, value)
+ factory.Set(name, ns3_value)
+
+ obj = factory.Create()
+
+ uuid = self.make_uuid()
+ self._objects[uuid] = obj
+
+ return uuid
def create(self, clazzname, *args):
if not hasattr(self.ns3, clazzname):
uuid = self.make_uuid()
self._objects[uuid] = obj
- #typeid = clazz.GetInstanceTypeId().GetName()
- typeid = "ns3::%s" % clazzname
- self._tids[uuid] = typeid
-
return uuid
def invoke(self, uuid, operation, *args):
return newuuid
+ def _set_attr(self, obj, name, ns3_value):
+ obj.SetAttribute(name, ns3_value)
+
def set(self, uuid, name, value):
obj = self.get_object(uuid)
- ns3_value = self._to_ns3_value(uuid, name, value)
-
- def set_attr(obj, name, ns3_value):
- obj.SetAttribute(name, ns3_value)
+ type_name = obj.GetInstanceTypeId().GetName()
+ ns3_value = self._attr_from_string_to_ns3_value(type_name, name, value)
# If the Simulation thread is not running,
# then there will be no thread-safety problems
# simulation.
if self.is_running:
# schedule the event in the Simulator
- self._schedule_event(self._condition, set_attr, obj,
- name, ns3_value)
+ self._schedule_event(self._condition, self._set_attr,
+ obj, name, ns3_value)
else:
- set_attr(obj, name, ns3_value)
+ self._set_attr(obj, name, ns3_value)
return value
+ def _get_attr(self, obj, name, ns3_value):
+ obj.GetAttribute(name, ns3_value)
+
def get(self, uuid, name):
obj = self.get_object(uuid)
- ns3_value = self._create_ns3_value(uuid, name)
-
- def get_attr(obj, name, ns3_value):
- obj.GetAttribute(name, ns3_value)
+ type_name = obj.GetInstanceTypeId().GetName()
+ ns3_value = self._create_attr_ns3_value(type_name, name)
if self.is_running:
# schedule the event in the Simulator
- self._schedule_event(self._condition, get_attr, obj,
+ self._schedule_event(self._condition, self._get_attr, obj,
name, ns3_value)
else:
get_attr(obj, name, ns3_value)
- return self._from_ns3_value(uuid, name, ns3_value)
+ return self._attr_from_ns3_value_to_string(type_name, name, ns3_value)
def start(self):
# Launch the simulator thread and Start the
self._started = True
def stop(self, time = None):
- if not self.ns3:
- return
-
if time is None:
self.ns3.Simulator.Stop()
else:
self.ns3.Simulator.Stop(self.ns3.Time(time))
def shutdown(self):
- if self.ns3:
- while not self.ns3.Simulator.IsFinished():
- #self.logger.debug("Waiting for simulation to finish")
- time.sleep(0.5)
-
- # TODO!!!! SHOULD WAIT UNTIL THE THREAD FINISHES
- if self._simulator_thread:
- self._simulator_thread.join()
-
- self.ns3.Simulator.Destroy()
+ while not self.ns3.Simulator.IsFinished():
+ #self.logger.debug("Waiting for simulation to finish")
+ time.sleep(0.5)
+
+ # TODO!!!! SHOULD WAIT UNTIL THE THREAD FINISHES
+ if self._simulator_thread:
+ self._simulator_thread.join()
+
+ self.ns3.Simulator.Destroy()
# Remove all references to ns-3 objects
self._objects.clear()
- self._ns3 = None
sys.stdout.flush()
sys.stderr.flush()
# bool flag, a list is used as wrapper
has_event_occurred = [False]
condition.acquire()
+
+ simu = self.ns3.Simulator
+
try:
- if not self.ns3.Simulator.IsFinished():
- self.ns3.Simulator.ScheduleWithContext(contextId, delay, execute_event,
+ if not simu.IsFinished():
+ simu.ScheduleWithContext(contextId, delay, execute_event,
condition, has_event_occurred, func, *args)
- while not has_event_occurred[0] and not self.ns3.Simulator.IsFinished():
+ while not has_event_occurred[0] and not simu.IsFinished():
condition.wait()
finally:
condition.release()
- def _create_ns3_value(self, uuid, name):
- typeid = self.get_typeid(uuid)
+ def _create_attr_ns3_value(self, type_name, name):
TypeId = self.ns3.TypeId()
- tid = TypeId.LookupByName(typeid)
+ tid = TypeId.LookupByName(type_name)
info = TypeId.AttributeInformation()
if not tid.LookupAttributeByName(name, info):
- msg = "TypeId %s has no attribute %s" % (typeid, name)
+ msg = "TypeId %s has no attribute %s" % (type_name, name)
self.logger.error(msg)
checker = info.checker
ns3_value = checker.Create()
return ns3_value
- def _from_ns3_value(self, uuid, name, ns3_value):
- typeid = self.get_typeid(uuid)
+ def _attr_from_ns3_value_to_string(self, type_name, name, ns3_value):
TypeId = self.ns3.TypeId()
- tid = TypeId.LookupByName(typeid)
+ tid = TypeId.LookupByName(type_name)
info = TypeId.AttributeInformation()
if not tid.LookupAttributeByName(name, info):
- msg = "TypeId %s has no attribute %s" % (typeid, name)
+ msg = "TypeId %s has no attribute %s" % (type_name, name)
self.logger.error(msg)
checker = info.checker
return value
- def _to_ns3_value(self, uuid, name, value):
- typeid = self.get_typeid(uuid)
+ def _attr_from_string_to_ns3_value(self, type_name, name, value):
TypeId = self.ns3.TypeId()
- tid = TypeId.LookupByName(typeid)
+ tid = TypeId.LookupByName(type_name)
info = TypeId.AttributeInformation()
if not tid.LookupAttributeByName(name, info):
- msg = "TypeId %s has no attribute %s" % (typeid, name)
+ msg = "TypeId %s has no attribute %s" % (type_name, name)
self.logger.error(msg)
str_value = str(value)
git://git.onelab.eu / nepi.git / commitdiff