#!/usr/bin/env python
# -*- coding: utf-8 -*-
-from constants import TESTBED_ID
from nepi.core import testbed_impl
-from nepi.util.constants import AF_INET, AF_INET6
+from nepi.core.attributes import Attribute
+from constants import TESTBED_ID
+from nepi.util.constants import TIME_NOW, \
+ TESTBED_STATUS_STARTED
import os
+import sys
+import threading
+import random
+import socket
+import weakref
+
+class TestbedController(testbed_impl.TestbedController):
+ from nepi.util.tunchannel_impl import TunChannel
+
+ LOCAL_FACTORIES = {
+ 'ns3::Nepi::TunChannel' : TunChannel,
+ }
+
+ LOCAL_TYPES = tuple(LOCAL_FACTORIES.values())
-class TestbedInstance(testbed_impl.TestbedInstance):
def __init__(self, testbed_version):
- super(TestbedInstance, self).__init__(TESTBED_ID, testbed_version)
+ 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
@property
def home_directory(self):
self._home_directory = self._attributes.\
get_attribute_value("homeDirectory")
self._ns3 = self._load_ns3_module()
+
+ # create home...
+ home = os.path.normpath(self.home_directory)
+ if not os.path.exists(home):
+ os.makedirs(home, 0755)
+
+ super(TestbedController, self).do_setup()
+
+ def start(self):
+ super(TestbedController, self).start()
+ self._condition = threading.Condition()
+ self._simulator_thread = threading.Thread(target = self._simulator_run,
+ args = [self._condition])
+ self._simulator_thread.isDaemon()
+ self._simulator_thread.start()
- def do_configure(self):
- # TODO: add traces!
- # configure addressess
- for guid, addresses in self._add_address.iteritems():
- element = self._elements[guid]
- for address in addresses:
- (family, address, netprefix, broadcast) = address
- if family == AF_INET:
- element.add_v4_address(address, netprefix)
- # configure routes
- for guid, routes in self._add_route.iteritems():
- element = self._elements[guid]
- for route in routes:
- (destination, netprefix, nexthop) = route
- element.add_route(prefix = destination, prefix_len = netprefix,
- nexthop = nexthop)
-
- def set(self, time, guid, name, value):
- super(TestbedInstance, self).set(time, guid, name, value)
- factory_id = self._crerate[guid]
+ def stop(self, time = TIME_NOW):
+ super(TestbedController, self).stop(time)
+ # BUG!!!!
+ # TODO!! This is not working!!!
+ self.ns3.Simulator.Stop()
+ #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):
+ return
element = self._elements[guid]
- self._set(element, factory_id, name, value)
+ if factory_id in self.LOCAL_FACTORIES:
+ setattr(element, name, value)
+ elif factory.box_attributes.is_attribute_invisible(name):
+ return
+ else:
+ ns3_value = self._to_ns3_value(guid, name, value)
+ self._set_attribute(name, ns3_value, element)
- def get(self, time, guid, name):
- raise NotImplementedError
+ 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
- #element = self._elements[guid]
- #return getattr(element, name)
+ factory_id = self._create[guid]
+ factory = self._factories[factory_id]
+ element = self._elements[guid]
+ if factory_id in self.LOCAL_FACTORIES:
+ if hasattr(element, name):
+ return getattr(element, name)
+ else:
+ return value
+ if factory.box_attributes.is_attribute_design_only(name) or \
+ factory.box_attributes.is_attribute_invisible(name):
+ return value
+ TypeId = self.ns3.TypeId()
+ typeid = TypeId.LookupByName(factory_id)
+ info = TypeId.AttributeInfo()
+ if not typeid or not typeid.LookupAttributeByName(name, info):
+ raise AttributeError("Invalid attribute %s for element type %d" % \
+ (name, guid))
+ checker = info.checker
+ ns3_value = checker.Create()
+ 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:
+ return int(value)
+ if attr_type == Attribute.DOUBLE:
+ return float(value)
+ if attr_type == Attribute.BOOL:
+ return value == "true"
+ return value
def action(self, time, guid, action):
raise NotImplementedError
- def trace(self, guid, trace_id):
- fd = open("%s" % self.trace_filename(guid, trace_id), "r")
- content = fd.read()
- fd.close()
- return content
+ def trace_filename(self, guid, trace_id):
+ # TODO: Need to be defined inside a home!!!! with and experiment id_code
+ filename = self._traces[guid][trace_id]
+ return os.path.join(self.home_directory, filename)
+
+ def follow_trace(self, guid, trace_id, filename):
+ if guid not in self._traces:
+ self._traces[guid] = dict()
+ self._traces[guid][trace_id] = filename
def shutdown(self):
- for trace in self._traces.values():
- trace.close()
- for element in self._elements.values():
- element.destroy()
+ for element in self._elements.itervalues():
+ if isinstance(element, self.LOCAL_TYPES):
+ # graceful shutdown of locally-implemented objects
+ element.Cleanup()
+ self._elements.clear()
+ if self.ns3:
+ self.ns3.Simulator.Stop()
+ # BUG!!!!
+ # TODO!! This is not working!!! NEVER STOPS THE SIMULATION!!!
+ #self._stop_simulation("0s")
+ #if self._simulator_thread:
+ # print "Joining thread"
+ # self._simulator_thread.join()
+ #print "destroying"
+ self.ns3.Simulator.Destroy()
+ self._ns3 = None
+ sys.stdout.flush()
+ sys.stderr.flush()
- def trace_filename(self, guid, trace_id):
- # TODO: Need to be defined inside a home!!!! with and experiment id_code
- return os.path.join(self.home_directory, "%d_%s" % (guid, trace_id))
+ def _simulator_run(self, condition):
+ # Run simulation
+ self.ns3.Simulator.Run()
+ # Signal condition on simulation end to notify waiting threads
+ condition.acquire()
+ condition.notifyAll()
+ condition.release()
+
+ def _schedule_event(self, condition, func, *args):
+ """Schedules event on running experiment"""
+ def execute_event(condition, has_event_occurred, func, *args):
+ # exec func
+ 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)
+ # delay 0 means that the event is expected to execute inmediately
+ delay = self.ns3.Seconds(0)
+ # flag to indicate that the event occured
+ # because bool is an inmutable object in python, in order to create a
+ # 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()
+
+ def _set_attribute(self, name, ns3_value, element):
+ if self.status() == TESTBED_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() == TESTBED_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 follow_trace(self, trace_id, trace):
- self._traces[trace_id] = trace
+ def _get_ns3_attribute(self, name, ns3_value, element):
+ element.GetAttribute(name, ns3_value)
- def _set(self, element, factory_id, name, value):
+ def _stop_simulation(self, time):
+ if self.status() == TESTBED_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_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]
TypeId = self.ns3.TypeId()
- typeId = TypeId.LookupByName(factory_id)
- index = None
- attr_count = typeId.GetAttributeN()
- for idx in range(attr_count):
- if name == typeId.GetAttributeName(idx)
- index = idx
- break
- checker = typeid.GetAttributeChecker(index)
- ns3_value = attribute_checker.Create()
- value = str(value)
+ typeid = TypeId.LookupByName(factory_id)
+ info = TypeId.AttributeInfo()
+ if not typeid.LookupAttributeByName(name, info):
+ raise RuntimeError("Attribute %s doesn't belong to element %s" \
+ % (name, factory_id))
+ str_value = str(value)
if isinstance(value, bool):
- value = value.lower()
- ns3_value.DeserializeFromString(value, checker)
- element.Set(name, ns3_value)
+ str_value = str_value.lower()
+ checker = info.checker
+ ns3_value = checker.Create()
+ ns3_value.DeserializeFromString(str_value, checker)
+ return ns3_value
def _load_ns3_module(self):
import ctypes
import imp
- bindings = self._attributes.get_attribute_value("ns3Bindings")
- libfile = self._attributes.get_attribute_value("ns3Library")
simu_impl_type = self._attributes.get_attribute_value(
"SimulatorImplementationType")
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)
if bindings:
path = [ bindings ] + path
- module = imp.find_module ('ns3', path)
- mod = imp.load_module ('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)
if simu_impl_type:
value = mod.StringValue(simu_impl_type)
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):
+ params = self._get_parameters(guid)
+ construct_params = dict()
+ factory_id = self._create[guid]
+ TypeId = self.ns3.TypeId()
+ typeid = TypeId.LookupByName(factory_id)
+ for name, value in params.iteritems():
+ info = self.ns3.TypeId.AttributeInfo()
+ found = typeid.LookupAttributeByName(name, info)
+ if found and \
+ (info.flags & TypeId.ATTR_CONSTRUCT == TypeId.ATTR_CONSTRUCT):
+ construct_params[name] = value
+ return construct_params
+
+
+
git://git.onelab.eu / nepi.git / blobdiff