2 # -*- coding: utf-8 -*-
4 from constants import TESTBED_ID
5 from nepi.core import testbed_impl
6 from nepi.core.attributes import Attribute
7 from nepi.util.constants import TESTBED_STATUS_CREATED
12 class TestbedController(testbed_impl.TestbedController):
13 def __init__(self, testbed_version):
14 super(TestbedController, self).__init__(TESTBED_ID, testbed_version)
16 self._home_directory = None
18 self._simulator_thread = None
19 self._condition = None
22 def home_directory(self):
23 return self._home_directory
30 self._home_directory = self._attributes.\
31 get_attribute_value("homeDirectory")
32 self._ns3 = self._load_ns3_module()
33 super(TestbedController, self).do_setup()
36 super(TestbedController, self).start()
37 self._condition = threading.Condition()
38 self._simulator_thread = threading.Thread(target = self._simulator_run,
39 args = [self._condition])
40 self._simulator_thread.start()
42 def set(self, time, guid, name, value):
43 super(TestbedController, self).set(time, guid, name, value)
44 # TODO: take on account schedule time for the task
45 factory_id = self._create[guid]
46 factory = self._factories[factory_id]
47 if factory.box_attributes.is_attribute_design_only(name):
49 element = self._elements[guid]
50 ns3_value = self._to_ns3_value(guid, name, value)
51 element.SetAttribute(name, ns3_value)
53 def get(self, time, guid, name):
54 value = super(TestbedController, self).get(time, guid, name)
55 # TODO: take on account schedule time for the task
56 factory_id = self._create[guid]
57 factory = self._factories[factory_id]
58 if factory.box_attributes.is_attribute_design_only(name):
60 TypeId = self.ns3.TypeId()
61 typeid = TypeId.LookupByName(factory_id)
62 info = TypeId.AttributeInfo()
63 if not typeid or not typeid.LookupAttributeByName(name, info):
64 raise AttributeError("Invalid attribute %s for element type %d" % \
66 checker = info.checker
67 ns3_value = checker.Create()
68 element = self._elements[guid]
69 element.GetAttribute(name, ns3_value)
70 value = ns3_value.SerializeToString(checker)
71 attr_type = factory.box_attributes.get_attribute_type(name)
72 if attr_type == Attribute.INTEGER:
74 if attr_type == Attribute.DOUBLE:
76 if attr_type == Attribute.BOOL:
77 return value == "true"
80 def get_route(self, guid, index, attribute):
81 # TODO: fetch real data from ns3
83 return self.box_get_route(guid, int(index), attribute)
84 except KeyError, AttributeError:
87 def get_address(self, guid, index, attribute='Address'):
88 # TODO: fetch real data from ns3
90 return self.box_get_address(guid, int(index), attribute)
91 except KeyError, AttributeError:
95 def action(self, time, guid, action):
96 raise NotImplementedError
98 def trace_filename(self, guid, trace_id):
99 # TODO: Need to be defined inside a home!!!! with and experiment id_code
100 filename = self._traces[guid][trace_id]
101 return os.path.join(self.home_directory, filename)
103 def follow_trace(self, guid, trace_id, filename):
104 if guid not in self._traces:
105 self._traces[guid] = dict()
106 self._traces[guid][trace_id] = filename
109 for element in self._elements.values():
112 def _simulator_run(self, condition):
114 self.ns3.Simulator.Run()
115 # Signal condition on simulation end to notify waiting threads
117 condition.notifyAll()
120 def _schedule_event(self, condition, func, *args):
121 """Schedules event on running experiment"""
122 def execute_event(condition, has_event_occurred, func, *args):
126 has_event_occurred[0] = True
127 # notify condition indicating attribute was set
129 condition.notifyAll()
132 # contextId is defined as general context
133 contextId = long(0xffffffff)
134 # delay 0 means that the event is expected to execute inmediately
135 delay = self.ns3.Seconds(0)
136 # flag to indicate that the event occured
137 # because bool is an inmutable object in python, in order to create a
138 # bool flag, a list is used as wrapper
139 has_event_occurred = [False]
141 if not self.ns3.Simulator.IsFinished():
142 self.ns3.Simulator.ScheduleWithContext(contextId, delay, execute_event,
143 condition, has_event_occurred, func, *args)
144 while not has_event_occurred[0] and not self.ns3.Simulator.IsFinished():
147 if not has_event_occurred[0]:
148 raise RuntimeError('Event could not be scheduled : %s %s ' \
149 % (repr(func), repr(args)))
151 def _to_ns3_value(self, guid, name, value):
152 factory_id = self._create[guid]
153 TypeId = self.ns3.TypeId()
154 typeid = TypeId.LookupByName(factory_id)
155 info = TypeId.AttributeInfo()
156 if not typeid.LookupAttributeByName(name, info):
157 raise RuntimeError("Attribute %s doesn't belong to element %s" \
158 % (name, factory_id))
159 str_value = str(value)
160 if isinstance(value, bool):
161 str_value = str_value.lower()
162 checker = info.checker
163 ns3_value = checker.Create()
164 ns3_value.DeserializeFromString(str_value, checker)
167 def _load_ns3_module(self):
171 simu_impl_type = self._attributes.get_attribute_value(
172 "SimulatorImplementationType")
173 checksum = self._attributes.get_attribute_value("ChecksumEnabled")
175 bindings = os.environ["NEPI_NS3BINDINGS"] \
176 if "NEPI_NS3BINDINGS" in os.environ else None
177 libfile = os.environ["NEPI_NS3LIBRARY"] \
178 if "NEPI_NS3LIBRARY" in os.environ else None
181 ctypes.CDLL(libfile, ctypes.RTLD_GLOBAL)
183 path = [ os.path.dirname(__file__) ] + sys.path
185 path = [ bindings ] + path
187 module = imp.find_module ('ns3', path)
188 mod = imp.load_module ('ns3', *module)
191 value = mod.StringValue(simu_impl_type)
192 mod.GlobalValue.Bind ("SimulatorImplementationType", value)
194 value = mod.BooleanValue(checksum)
195 mod.GlobalValue.Bind ("ChecksumEnabled", value)
198 def _get_construct_parameters(self, guid):
199 params = self._get_parameters(guid)
200 construct_params = dict()
201 factory_id = self._create[guid]
202 TypeId = self.ns3.TypeId()
203 typeid = TypeId.LookupByName(factory_id)
204 for name, value in params.iteritems():
205 info = self.ns3.TypeId.AttributeInfo()
206 found = typeid.LookupAttributeByName(name, info)
208 (info.flags & TypeId.ATTR_CONSTRUCT == TypeId.ATTR_CONSTRUCT):
209 construct_params[name] = value
210 return construct_params