src/nepi/testbeds/netns/execute.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 from constants import TESTBED_ID
   5 from nepi.core import testbed_impl
   6 from nepi.util.constants import AF_INET, AF_INET6
   7 import os
   8
   9 class TestbedInstance(testbed_impl.TestbedInstance):
  10     def __init__(self, testbed_version):
  11         super(TestbedInstance, self).__init__(TESTBED_ID, testbed_version)
  12         self._netns = None
  13         self._home_directory = None
  14         self._traces = dict()
  15
  16     @property
  17     def home_directory(self):
  18         return self._home_directory
  19
  20     @property
  21     def netns(self):
  22         return self._netns
  23
  24     def do_setup(self):
  25         self._home_directory = self._attributes.\
  26             get_attribute_value("homeDirectory")
  27         self._netns = self._load_netns_module()
  28
  29     def do_configure(self):
  30         # TODO: add traces!
  31         # configure addressess
  32         for guid, addresses in self._add_address.iteritems():
  33             element = self._elements[guid]
  34             for address in addresses:
  35                 (family, address, netprefix, broadcast) = address
  36                 if family == AF_INET:
  37                     element.add_v4_address(address, netprefix)
  38         # configure routes
  39         for guid, routes in self._add_route.iteritems():
  40             element = self._elements[guid]
  41             for route in routes:
  42                 (destination, netprefix, nexthop) = route
  43                 element.add_route(prefix = destination, prefix_len = netprefix,
  44                         nexthop = nexthop)
  45
  46     def set(self, time, guid, name, value):
  47         super(TestbedInstance, self).set(time, guid, name, value)
  48         # TODO: take on account schedule time for the task
  49         element = self._elements[guid]
  50         if element:
  51             setattr(element, name, value)
  52
  53     def get(self, time, guid, name):
  54         # TODO: take on account schedule time for the task
  55         element = self._elements[guid]
  56         return getattr(element, name)
  57
  58     def action(self, time, guid, action):
  59         raise NotImplementedError
  60
  61     def trace(self, guid, trace_id):
  62         f = open(self.trace_filename(guid, trace_id), "r")
  63         content = f.read()
  64         f.close()
  65         return content
  66
  67     def shutdown(self):
  68         for trace in self._traces.values():
  69             trace.close()
  70         for element in self._elements.values():
  71             element.destroy()
  72
  73     def trace_filename(self, guid, trace_id):
  74         # TODO: Need to be defined inside a home!!!! with and experiment id_code
  75         return os.path.join(self.home_directory, "%d_%s" % (guid, trace_id))
  76
  77     def follow_trace(self, trace_id, trace):
  78         self._traces[trace_id] = trace
  79
  80     def _load_netns_module(self):
  81         # TODO: Do something with the configuration!!!
  82         import sys
  83         __import__("netns")
  84         netns_mod = sys.modules["netns"]
  85         # enable debug
  86         enable_debug = self._attributes.get_attribute_value("enableDebug")
  87         if enable_debug:
  88             netns_mod.environ.set_log_level(netns_mod.environ.LOG_DEBUG)
  89         return netns_mod
  90