2 # -*- coding: utf-8 -*-
4 from nepi.core import testbed_impl
5 from nepi.core.attributes import Attribute
6 from constants import TESTBED_ID
7 from nepi.util.constants import TIME_NOW, \
16 class TestbedController(testbed_impl.TestbedController):
17 from nepi.util.tunchannel_impl import TunChannel
20 'ns3::Nepi::TunChannel' : TunChannel,
23 LOCAL_TYPES = tuple(LOCAL_FACTORIES.values())
25 def __init__(self, testbed_version):
26 super(TestbedController, self).__init__(TESTBED_ID, testbed_version)
28 self._home_directory = None
30 self._simulator_thread = None
31 self._condition = None
34 def home_directory(self):
35 return self._home_directory
42 self._home_directory = self._attributes.\
43 get_attribute_value("homeDirectory")
44 self._ns3 = self._load_ns3_module()
47 home = os.path.normpath(self.home_directory)
48 if not os.path.exists(home):
49 os.makedirs(home, 0755)
51 super(TestbedController, self).do_setup()
54 super(TestbedController, self).start()
55 self._condition = threading.Condition()
56 self._simulator_thread = threading.Thread(target = self._simulator_run,
57 args = [self._condition])
58 self._simulator_thread.start()
60 def set(self, guid, name, value, time = TIME_NOW):
61 super(TestbedController, self).set(guid, name, value, time)
62 # TODO: take on account schedule time for the task
63 factory_id = self._create[guid]
64 factory = self._factories[factory_id]
65 if factory.box_attributes.is_attribute_design_only(name):
67 element = self._elements[guid]
68 if factory_id in self.LOCAL_FACTORIES:
69 setattr(element, name, value)
70 elif factory.box_attributes.is_attribute_invisible(name):
73 ns3_value = self._to_ns3_value(guid, name, value)
74 self._set_attribute(name, ns3_value, element)
76 def get(self, guid, name, time = TIME_NOW):
77 value = super(TestbedController, self).get(guid, name, time)
78 # TODO: take on account schedule time for the task
79 factory_id = self._create[guid]
80 factory = self._factories[factory_id]
81 element = self._elements[guid]
82 if factory_id in self.LOCAL_FACTORIES:
83 if hasattr(element, name):
84 return getattr(element, name)
87 if factory.box_attributes.is_attribute_design_only(name) or \
88 factory.box_attributes.is_attribute_invisible(name):
90 TypeId = self.ns3.TypeId()
91 typeid = TypeId.LookupByName(factory_id)
92 info = TypeId.AttributeInfo()
93 if not typeid or not typeid.LookupAttributeByName(name, info):
94 raise AttributeError("Invalid attribute %s for element type %d" % \
96 checker = info.checker
97 ns3_value = checker.Create()
98 self._get_attribute(name, ns3_value, element)
99 value = ns3_value.SerializeToString(checker)
100 attr_type = factory.box_attributes.get_attribute_type(name)
101 if attr_type == Attribute.INTEGER:
103 if attr_type == Attribute.DOUBLE:
105 if attr_type == Attribute.BOOL:
106 return value == "true"
109 def action(self, time, guid, action):
110 raise NotImplementedError
112 def trace_filename(self, guid, trace_id):
113 # TODO: Need to be defined inside a home!!!! with and experiment id_code
114 filename = self._traces[guid][trace_id]
115 return os.path.join(self.home_directory, filename)
117 def follow_trace(self, guid, trace_id, filename):
118 if guid not in self._traces:
119 self._traces[guid] = dict()
120 self._traces[guid][trace_id] = filename
123 for element in self._elements.values():
124 if isinstance(element, self.LOCAL_TYPES):
125 # graceful shutdown of locally-implemented objects
131 def _simulator_run(self, condition):
133 self.ns3.Simulator.Run()
134 # Signal condition on simulation end to notify waiting threads
136 condition.notifyAll()
139 def _schedule_event(self, condition, func, *args):
140 """Schedules event on running experiment"""
141 def execute_event(condition, has_event_occurred, func, *args):
145 has_event_occurred[0] = True
146 # notify condition indicating attribute was set
148 condition.notifyAll()
151 # contextId is defined as general context
152 contextId = long(0xffffffff)
153 # delay 0 means that the event is expected to execute inmediately
154 delay = self.ns3.Seconds(0)
155 # flag to indicate that the event occured
156 # because bool is an inmutable object in python, in order to create a
157 # bool flag, a list is used as wrapper
158 has_event_occurred = [False]
160 if not self.ns3.Simulator.IsFinished():
161 self.ns3.Simulator.ScheduleWithContext(contextId, delay, execute_event,
162 condition, has_event_occurred, func, *args)
163 while not has_event_occurred[0] and not self.ns3.Simulator.IsFinished():
166 if not has_event_occurred[0]:
167 raise RuntimeError('Event could not be scheduled : %s %s ' \
168 % (repr(func), repr(args)))
170 def _set_attribute(self, name, ns3_value, element):
171 if self.status() == TESTBED_STATUS_STARTED:
172 # schedule the event in the Simulator
173 self._schedule_event(self._condition, self._set_ns3_attribute,
174 name, ns3_value, element)
176 self._set_ns3_attribute(name, ns3_value, element)
178 def _get_attribute(self, name, ns3_value, element):
179 if self.status() == TESTBED_STATUS_STARTED:
180 # schedule the event in the Simulator
181 self._schedule_event(self._condition, self._get_ns3_attribute,
182 name, ns3_value, element)
184 self._get_ns3_attribute(name, ns3_value, element)
186 def _set_ns3_attribute(self, name, ns3_value, element):
187 element.SetAttribute(name, ns3_value)
189 def _get_ns3_attribute(self, name, ns3_value, element):
190 element.GetAttribute(name, ns3_value)
192 def _to_ns3_value(self, guid, name, value):
193 factory_id = self._create[guid]
194 TypeId = self.ns3.TypeId()
195 typeid = TypeId.LookupByName(factory_id)
196 info = TypeId.AttributeInfo()
197 if not typeid.LookupAttributeByName(name, info):
198 raise RuntimeError("Attribute %s doesn't belong to element %s" \
199 % (name, factory_id))
200 str_value = str(value)
201 if isinstance(value, bool):
202 str_value = str_value.lower()
203 checker = info.checker
204 ns3_value = checker.Create()
205 ns3_value.DeserializeFromString(str_value, checker)
208 def _load_ns3_module(self):
212 simu_impl_type = self._attributes.get_attribute_value(
213 "SimulatorImplementationType")
214 checksum = self._attributes.get_attribute_value("ChecksumEnabled")
215 stop_time = self._attributes.get_attribute_value("StopTime")
217 bindings = os.environ["NEPI_NS3BINDINGS"] \
218 if "NEPI_NS3BINDINGS" in os.environ else None
219 libfile = os.environ["NEPI_NS3LIBRARY"] \
220 if "NEPI_NS3LIBRARY" in os.environ else None
223 ctypes.CDLL(libfile, ctypes.RTLD_GLOBAL)
225 path = [ os.path.dirname(__file__) ] + sys.path
227 path = [ bindings ] + path
230 module = imp.find_module ('ns3', path)
231 mod = imp.load_module ('ns3', *module)
233 # In some environments, ns3 per-se does not exist,
234 # only the low-level _ns3
235 module = imp.find_module ('_ns3', path)
236 mod = imp.load_module ('_ns3', *module)
237 sys.modules["ns3"] = mod # install it as ns3 too
239 # When using _ns3, we have to make sure we destroy
240 # the simulator when the process finishes
242 atexit.register(mod.Simulator.Destroy)
245 value = mod.StringValue(simu_impl_type)
246 mod.GlobalValue.Bind ("SimulatorImplementationType", value)
248 value = mod.BooleanValue(checksum)
249 mod.GlobalValue.Bind ("ChecksumEnabled", value)
251 value = mod.Time(stop_time)
252 mod.Simulator.Stop (value)
255 def _get_construct_parameters(self, guid):
256 params = self._get_parameters(guid)
257 construct_params = dict()
258 factory_id = self._create[guid]
259 TypeId = self.ns3.TypeId()
260 typeid = TypeId.LookupByName(factory_id)
261 for name, value in params.iteritems():
262 info = self.ns3.TypeId.AttributeInfo()
263 found = typeid.LookupAttributeByName(name, info)
265 (info.flags & TypeId.ATTR_CONSTRUCT == TypeId.ATTR_CONSTRUCT):
266 construct_params[name] = value
267 return construct_params