2 # -*- coding: utf-8 -*-
4 from nepi.core import execute
5 from nepi.core.metadata import Metadata
6 from nepi.util import validation
7 from nepi.util.constants import AF_INET, AF_INET6, STATUS_UNDETERMINED, TIME_NOW
9 class TestbedInstance(execute.TestbedInstance):
10 def __init__(self, testbed_id, testbed_version):
11 super(TestbedInstance, self).__init__(testbed_id, testbed_version)
13 # testbed attributes for validation
14 self._attributes = None
15 # element factories for validation
16 self._factories = dict()
18 # experiment construction instructions
20 self._create_set = dict()
21 self._factory_set = dict()
22 self._connect = dict()
23 self._cross_connect = dict()
24 self._add_trace = dict()
25 self._add_address = dict()
26 self._add_route = dict()
27 self._configure = dict()
29 # log of set operations
32 # testbed element instances
33 self._elements = dict()
35 self._metadata = Metadata(self._testbed_id, self._testbed_version)
36 for factory in self._metadata.build_execute_factories():
37 self._factories[factory.factory_id] = factory
38 self._attributes = self._metadata.testbed_attributes()
42 return self._create.keys()
48 def configure(self, name, value):
49 if not self._attributes.has_attribute(name):
50 raise RuntimeError("Invalid attribute %s for testbed" % name)
52 self._attributes.set_attribute_value(name, value)
53 self._configure[name] = value
55 def create(self, guid, factory_id):
56 if factory_id not in self._factories:
57 raise RuntimeError("Invalid element type %s for Netns version %s" %
58 (factory_id, self._testbed_version))
59 if guid in self._create:
60 raise RuntimeError("Cannot add elements with the same guid: %d" %
62 self._create[guid] = factory_id
64 def create_set(self, guid, name, value):
65 if not guid in self._create:
66 raise RuntimeError("Element guid %d doesn't exist" % guid)
67 factory_id = self._create[guid]
68 factory = self._factories[factory_id]
69 if not factory.box_attributes.has_attribute(name):
70 raise RuntimeError("Invalid attribute %s for element type %s" %
72 factory.box_attributes.set_attribute_value(name, value)
73 if guid not in self._create_set:
74 self._create_set[guid] = dict()
75 self._create_set[guid][name] = value
77 def factory_set(self, guid, name, value):
78 if not guid in self._create:
79 raise RuntimeError("Element guid %d doesn't exist" % guid)
80 factory_id = self._create[guid]
81 factory = self._factories[factory_id]
82 if not factory.has_attribute(name):
83 raise RuntimeError("Invalid attribute %s for element type %s" %
85 factory.set_attribute_value(name, value)
86 if guid not in self._factory_set:
87 self._factory_set[guid] = dict()
88 self._factory_set[guid][name] = value
90 def connect(self, guid1, connector_type_name1, guid2,
91 connector_type_name2):
92 factory_id1 = self._create[guid1]
93 factory_id2 = self._create[guid2]
94 count = self._get_connection_count(guid1, connector_type_name1)
95 factory1 = self._factories[factory_id1]
96 connector_type = factory1.connector_type(connector_type_name1)
97 connector_type.can_connect(self._testbed_id, factory_id2,
98 connector_type_name2, count)
99 if not guid1 in self._connect:
100 self._connect[guid1] = dict()
101 if not connector_type_name1 in self._connect[guid1]:
102 self._connect[guid1][connector_type_name1] = dict()
103 self._connect[guid1][connector_type_name1][guid2] = \
105 if not guid2 in self._connect:
106 self._connect[guid2] = dict()
107 if not connector_type_name2 in self._connect[guid2]:
108 self._connect[guid2][connector_type_name2] = dict()
109 self._connect[guid2][connector_type_name2][guid1] = \
112 def cross_connect(self, guid, connector_type_name, cross_guid,
113 cross_testbed_id, cross_factory_id, cross_connector_type_name):
114 factory_id = self._create[guid]
115 count = self._get_connection_count(guid, connector_type_name)
116 factory = self._factories[factory_id]
117 connector_type = factory.connector_type(connector_type_name)
118 connector_type.can_connect(cross_testbed_id, cross_factory_id,
119 cross_connector_type_name, count, must_cross = True)
120 if not guid in self._connect:
121 self._cross_connect[guid] = dict()
122 if not connector_type_name in self._cross_connect[guid]:
123 self._cross_connect[guid][connector_type_name] = dict()
124 self._cross_connect[guid][connector_type_name] = \
125 (cross_guid, cross_testbed_id, cross_factory_id,
126 cross_connector_type_name)
128 def add_trace(self, guid, trace_id):
129 if not guid in self._create:
130 raise RuntimeError("Element guid %d doesn't exist" % guid)
131 factory_id = self._create[guid]
132 factory = self._factories[factory_id]
133 if not trace_id in factory.traces:
134 raise RuntimeError("Element type '%s' has no trace '%s'" %
135 (factory_id, trace_id))
136 if not guid in self._add_trace:
137 self._add_trace[guid] = list()
138 self._add_trace[guid].append(trace_id)
140 def add_address(self, guid, family, address, netprefix, broadcast):
141 if not guid in self._create:
142 raise RuntimeError("Element guid %d doesn't exist" % guid)
143 factory_id = self._create[guid]
144 factory = self._factories[factory_id]
145 if not factory.allow_addresses:
146 raise RuntimeError("Element type '%s' doesn't support addresses" %
148 max_addresses = factory.get_attribute_value("MaxAddresses")
149 if guid in self._add_address:
150 count_addresses = len(self._add_address[guid])
151 if max_addresses == count_addresses:
152 raise RuntimeError("Element guid %d of type '%s' can't accept \
153 more addresses" % (guid, family_id))
155 self._add_address[guid] = list()
156 self._add_address[guid].append((family, address, netprefix, broadcast))
158 def add_route(self, guid, destination, netprefix, nexthop):
159 if not guid in self._create:
160 raise RuntimeError("Element guid %d doesn't exist" % guid)
161 factory_id = self._create[guid]
162 factory = self._factories[factory_id]
163 if not factory.allow_routes:
164 raise RuntimeError("Element type '%s' doesn't support routes" %
166 if not guid in self._add_route:
167 self._add_route[guid] = list()
168 self._add_route[guid].append((destination, netprefix, nexthop))
171 raise NotImplementedError
175 # order guids (elements) according to factory_id
176 for guid, factory_id in self._create.iteritems():
177 if not factory_id in guids:
178 guids[factory_id] = list()
179 guids[factory_id].append(guid)
180 # create elements following the factory_id order
181 for factory_id in self._metadata.factories_order:
182 # omit the factories that have no element to create
183 if factory_id not in guids:
185 factory = self._factories[factory_id]
186 for guid in guids[factory_id]:
187 parameters = dict() if guid not in self._create_set else \
188 self._create_set[guid]
189 factory_parameters = dict() if guid not in \
190 self._factory_set else self._create_set[guid]
191 factory.create_function(self, guid, parameters,
193 for name, value in parameters.iteritems():
194 self.set(TIME_NOW, guid, name, value)
196 def do_connect(self):
197 for guid1, connections in self._connect.iteritems():
198 element1 = self._elements[guid1]
199 factory_id1 = self._create[guid1]
200 factory1 = self._factories[factory_id1]
201 for connector_type_name1, connections2 in connections.iteritems():
202 connector_type1 = factory1.connector_type(connector_type_name1)
203 for guid2, connector_type_name2 in connections2.iteritems():
204 element2 = self._elements[guid2]
205 factory_id2 = self._create[guid2]
206 # Connections are executed in a "From -> To" direction only
207 # This explicitly ignores the "To -> From" (mirror)
208 # connections of every connection pair.
209 code_to_connect = connector_type1.code_to_connect(
210 self._testbed_id, factory_id2,
211 connector_type_name2)
213 code_to_connect(element1, element2)
215 def do_configure(self):
216 raise NotImplementedError
218 def do_cross_connect(self):
219 for guid, cross_connections in self._cross_connect.iteritems():
220 element = self._elements[guid]
221 factory_id = self._create[guid]
222 factory = self._factories[factory_id]
223 for connector_type_name, cross_connection in \
224 cross_connections.iteritems():
225 connector_type = factory.connector_type(connector_type_name)
226 (cross_testbed_id, cross_factory_id,
227 cross_connector_type_name) = cross_connection
228 code_to_connect = connector_type.code_to_connect(
229 cross_guid, cross_testbed_id, cross_factory_id,
230 cross_conector_type_name)
232 code_to_connect(element, cross_guid)
234 def set(self, time, guid, name, value):
235 if not guid in self._create:
236 raise RuntimeError("Element guid %d doesn't exist" % guid)
237 factory_id = self._create[guid]
238 factory = self._factories[factory_id]
239 if not factory.box_attributes.has_attribute(name):
240 raise RuntimeError("Invalid attribute %s for element type %s" %
242 if self._started and factory.is_attribute_design_only(name):
243 raise RuntimeError("Attribute %s can only be modified during experiment design" % name)
244 factory.box_attributes.set_attribute_value(name, value)
245 if guid not in self._set:
246 self._set[guid] = dict()
247 if time not in self._set[guid]:
248 self._set[guid][time] = dict()
249 self._set[guid][time][name] = value
251 def get(self, time, guid, name):
252 raise NotImplementedError
254 def start(self, time = TIME_NOW):
255 for guid, factory_id in self._create.iteritems():
256 factory = self._factories[factory_id]
257 start_function = factory.start_function
259 traces = [] if guid not in self._add_trace else \
260 self._add_trace[guid]
261 parameters = dict() if guid not in self._create_set else \
262 self._create_set[guid]
263 start_function(self, guid, parameters, traces)
266 def action(self, time, guid, action):
267 raise NotImplementedError
269 def stop(self, time = TIME_NOW):
270 for guid, factory_id in self._create.iteritems():
271 factory = self._factories[factory_id]
272 stop_function = factory.stop_function
274 traces = [] if guid not in self._add_trace else \
275 self._add_trace[guid]
276 stop_function(self, guid, traces)
278 def status(self, guid):
279 for guid, factory_id in self._create.iteritems():
280 factory = self._factories[factory_id]
281 status_function = factory.status_function
283 return status_function(self, guid)
284 return STATUS_UNDETERMINED
286 def trace(self, guid, trace_id):
287 raise NotImplementedError
290 raise NotImplementedError
292 def get_connected(self, guid, connector_type_name,
293 other_connector_type_name):
294 """searchs the connected elements for the specific connector_type_name
296 if guid not in self._connect:
298 # all connections for all connectors for guid
299 all_connections = self._connect[guid]
300 if connector_type_name not in all_connections:
302 # all connections for the specific connector
303 connections = all_connections[connector_type_name]
304 specific_connections = [otr_guid for otr_guid, otr_connector_type_name \
305 in connections.iteritems() if \
306 otr_connector_type_name == other_connector_type_name]
307 return specific_connections
309 def _get_connection_count(self, guid, connection_type_name):
312 if guid in self._connect and connection_type_name in \
314 count = len(self._connect[guid][connection_type_name])
315 if guid in self._cross_connect and connection_type_name in \
316 self._cross_connect[guid]:
317 cross_count = len(self._cross_connect[guid][connection_type_name])
318 return count + cross_count