#!/usr/bin/env python
# -*- coding: utf-8 -*-
-from constants import TESTBED_ID
from nepi.core import testbed_impl
from nepi.core.attributes import Attribute
-from nepi.util.constants import TIME_NOW
+from constants import TESTBED_ID, TESTBED_VERSION
+from nepi.util.constants import TIME_NOW, TestbedStatus as TS
import os
import sys
import threading
import socket
import weakref
-from nepi.util.tunchannel import TunChannel
+def load_ns3_module():
+ import sys
+ if 'ns3' in sys.modules:
+ return
+
+ import ctypes
+ import imp
+ import re
+
+ bindings = os.environ["NEPI_NS3BINDINGS"] \
+ if "NEPI_NS3BINDINGS" in os.environ else None
+ libdir = os.environ["NEPI_NS3LIBRARY"] \
+ if "NEPI_NS3LIBRARY" in os.environ else None
+
+ if libdir:
+ files = os.listdir(libdir)
+ regex = re.compile("(.*\.so)$")
+ libs = [m.group(1) for filename in files for m in [regex.search(filename)] if m]
+
+ libscp = list(libs)
+ while len(libs) > 0:
+ for lib in libscp:
+ libfile = os.path.join(libdir, lib)
+ try:
+ ctypes.CDLL(libfile, ctypes.RTLD_GLOBAL)
+ libs.remove(lib)
+ except:
+ pass
+ # if did not load any libraries in the last iteration
+ if len(libscp) == len(libs):
+ raise RuntimeError("Imposible to load shared libraries %s" % str(libs))
+ libscp = list(libs)
+
+ if bindings:
+ sys.path.append(bindings)
+
+ import ns3_bindings_import as mod
+ sys.modules["ns3"] = mod
class TestbedController(testbed_impl.TestbedController):
+ from nepi.util.tunchannel_impl import TunChannel
+
LOCAL_FACTORIES = {
'ns3::Nepi::TunChannel' : TunChannel,
}
+
+ LOCAL_TYPES = tuple(LOCAL_FACTORIES.values())
- def __init__(self, testbed_version):
- super(TestbedController, self).__init__(TESTBED_ID, testbed_version)
+ def __init__(self):
+ super(TestbedController, self).__init__(TESTBED_ID, TESTBED_VERSION)
self._ns3 = None
self._home_directory = None
self._traces = dict()
self._simulator_thread = None
self._condition = None
-
- # local factories
- self.TunChannel = TunChannel
@property
def home_directory(self):
def do_setup(self):
self._home_directory = self._attributes.\
get_attribute_value("homeDirectory")
- self._ns3 = self._load_ns3_module()
+ self._ns3 = self._configure_ns3_module()
# create home...
home = os.path.normpath(self.home_directory)
self._condition = threading.Condition()
self._simulator_thread = threading.Thread(target = self._simulator_run,
args = [self._condition])
+ self._simulator_thread.setDaemon(True)
self._simulator_thread.start()
+ def stop(self, time = TIME_NOW):
+ super(TestbedController, self).stop(time)
+ self._stop_simulation(time)
+
def set(self, guid, name, value, time = TIME_NOW):
super(TestbedController, self).set(guid, name, value, time)
# TODO: take on account schedule time for the task
factory_id = self._create[guid]
factory = self._factories[factory_id]
- if factory.box_attributes.is_attribute_design_only(name) or \
- factory.box_attributes.is_attribute_invisible(name):
- return
element = self._elements[guid]
if factory_id in self.LOCAL_FACTORIES:
setattr(element, name, value)
- else:
- ns3_value = self._to_ns3_value(guid, name, value)
- element.SetAttribute(name, ns3_value)
+ elif not factory.box_attributes.is_attribute_metadata(name):
+ ns3_value = self._to_ns3_value(guid, name, value)
+ self._set_attribute(name, ns3_value, element)
def get(self, guid, name, time = TIME_NOW):
value = super(TestbedController, self).get(guid, name, time)
# TODO: take on account schedule time for the task
factory_id = self._create[guid]
factory = self._factories[factory_id]
- if factory.box_attributes.is_attribute_design_only(name) or \
- factory.box_attributes.is_attribute_invisible(name):
- return value
+ element = self._elements[guid]
if factory_id in self.LOCAL_FACTORIES:
- return getattr(element, name)
+ if hasattr(element, name):
+ return getattr(element, name)
+ else:
+ return value
+ if factory.box_attributes.is_attribute_metadata(name):
+ return value
+
TypeId = self.ns3.TypeId()
typeid = TypeId.LookupByName(factory_id)
info = TypeId.AttributeInfo()
(name, guid))
checker = info.checker
ns3_value = checker.Create()
- element = self._elements[guid]
- element.GetAttribute(name, ns3_value)
+ self._get_attribute(name, ns3_value, element)
value = ns3_value.SerializeToString(checker)
attr_type = factory.box_attributes.get_attribute_type(name)
if attr_type == Attribute.INTEGER:
def action(self, time, guid, action):
raise NotImplementedError
- def trace_filename(self, guid, trace_id):
- # TODO: Need to be defined inside a home!!!! with and experiment id_code
+ def trace_filepath(self, guid, trace_id):
filename = self._traces[guid][trace_id]
return os.path.join(self.home_directory, filename)
+ def trace_filename(self, guid, trace_id):
+ return self._traces[guid][trace_id]
+
def follow_trace(self, guid, trace_id, filename):
- if guid not in self._traces:
+ if not guid in self._traces:
self._traces[guid] = dict()
self._traces[guid][trace_id] = filename
def shutdown(self):
- for element in self._elements.values():
- element = None
+ for element in self._elements.itervalues():
+ if isinstance(element, self.LOCAL_TYPES):
+ # graceful shutdown of locally-implemented objects
+ element.cleanup()
+ if self.ns3:
+ if not self.ns3.Simulator.IsFinished():
+ self.stop()
+
+ # TODO!!!! SHOULD WAIT UNTIL THE THREAD FINISHES
+ if self._simulator_thread:
+ self._simulator_thread.join()
+
+ self.ns3.Simulator.Destroy()
+
+ self._elements.clear()
+
+ self._ns3 = None
+ sys.stdout.flush()
+ sys.stderr.flush()
def _simulator_run(self, condition):
# Run simulation
"""Schedules event on running experiment"""
def execute_event(condition, has_event_occurred, func, *args):
# exec func
- func(*args)
- # flag event occured
- has_event_occurred[0] = True
- # notify condition indicating attribute was set
- condition.acquire()
- condition.notifyAll()
- condition.release()
+ try:
+ func(*args)
+ finally:
+ # flag event occured
+ has_event_occurred[0] = True
+ # notify condition indicating attribute was set
+ condition.acquire()
+ condition.notifyAll()
+ condition.release()
# contextId is defined as general context
contextId = long(0xffffffff)
# bool flag, a list is used as wrapper
has_event_occurred = [False]
condition.acquire()
- if not self.ns3.Simulator.IsFinished():
- self.ns3.Simulator.ScheduleWithContext(contextId, delay, execute_event,
- condition, has_event_occurred, func, *args)
- while not has_event_occurred[0] and not self.ns3.Simulator.IsFinished():
- condition.wait()
- condition.release()
- if not has_event_occurred[0]:
- raise RuntimeError('Event could not be scheduled : %s %s ' \
- % (repr(func), repr(args)))
+ try:
+ if not self.ns3.Simulator.IsFinished():
+ self.ns3.Simulator.ScheduleWithContext(contextId, delay, execute_event,
+ condition, has_event_occurred, func, *args)
+ while not has_event_occurred[0] and not self.ns3.Simulator.IsFinished():
+ condition.wait()
+ finally:
+ condition.release()
+
+ def _set_attribute(self, name, ns3_value, element):
+ if self.status() == TS.STATUS_STARTED:
+ # schedule the event in the Simulator
+ self._schedule_event(self._condition, self._set_ns3_attribute,
+ name, ns3_value, element)
+ else:
+ self._set_ns3_attribute(name, ns3_value, element)
+
+ def _get_attribute(self, name, ns3_value, element):
+ if self.status() == TS.STATUS_STARTED:
+ # schedule the event in the Simulator
+ self._schedule_event(self._condition, self._get_ns3_attribute,
+ name, ns3_value, element)
+ else:
+ self._get_ns3_attribute(name, ns3_value, element)
+
+ def _set_ns3_attribute(self, name, ns3_value, element):
+ element.SetAttribute(name, ns3_value)
+
+ def _get_ns3_attribute(self, name, ns3_value, element):
+ element.GetAttribute(name, ns3_value)
+
+ def _stop_simulation(self, time):
+ if self.status() == TS.STATUS_STARTED:
+ # schedule the event in the Simulator
+ self._schedule_event(self._condition, self._stop_ns3_simulation,
+ time)
+ else:
+ self._stop_ns3_simulation(time)
+
+ def _stop_ns3_simulation(self, time = TIME_NOW):
+ if not self.ns3:
+ return
+ if time == TIME_NOW:
+ self.ns3.Simulator.Stop()
+ else:
+ self.ns3.Simulator.Stop(self.ns3.Time(time))
def _to_ns3_value(self, guid, name, value):
factory_id = self._create[guid]
ns3_value.DeserializeFromString(str_value, checker)
return ns3_value
- def _load_ns3_module(self):
- import ctypes
- import imp
-
+ def _configure_ns3_module(self):
simu_impl_type = self._attributes.get_attribute_value(
"SimulatorImplementationType")
+ sched_impl_type = self._attributes.get_attribute_value(
+ "SchedulerType")
checksum = self._attributes.get_attribute_value("ChecksumEnabled")
+ stop_time = self._attributes.get_attribute_value("StopTime")
- bindings = os.environ["NEPI_NS3BINDINGS"] \
- if "NEPI_NS3BINDINGS" in os.environ else None
- libfile = os.environ["NEPI_NS3LIBRARY"] \
- if "NEPI_NS3LIBRARY" in os.environ else None
-
- if libfile:
- ctypes.CDLL(libfile, ctypes.RTLD_GLOBAL)
-
- path = [ os.path.dirname(__file__) ] + sys.path
- if bindings:
- path = [ bindings ] + path
+ load_ns3_module()
- try:
- module = imp.find_module ('ns3', path)
- mod = imp.load_module ('ns3', *module)
- except ImportError:
- # In some environments, ns3 per-se does not exist,
- # only the low-level _ns3
- module = imp.find_module ('_ns3', path)
- mod = imp.load_module ('_ns3', *module)
- sys.modules["ns3"] = mod # install it as ns3 too
-
- # When using _ns3, we have to make sure we destroy
- # the simulator when the process finishes
- import atexit
- atexit.register(mod.Simulator.Destroy)
-
+ import ns3 as mod
+
if simu_impl_type:
value = mod.StringValue(simu_impl_type)
mod.GlobalValue.Bind ("SimulatorImplementationType", value)
+ if sched_impl_type:
+ value = mod.StringValue(sched_impl_type)
+ mod.GlobalValue.Bind ("SchedulerType", value)
if checksum:
value = mod.BooleanValue(checksum)
mod.GlobalValue.Bind ("ChecksumEnabled", value)
+ if stop_time:
+ value = mod.Time(stop_time)
+ mod.Simulator.Stop (value)
return mod
def _get_construct_parameters(self, guid):
git://git.onelab.eu / nepi.git / blobdiff