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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (c) 2017 Cisco and/or its affiliates.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from vicn.resource.ns3.emulated_channel import EmulatedChannel
from vicn.resource.linux.net_device import NetDevice
from vicn.core.address_mgr import AddressManager
from vicn.core.resource_mgr import wait_resources
from vicn.core.task import async_task, run_task
class EmulatedWiFiChannel(EmulatedChannel):
"""EmulatedWiFiChannel Resource
This resource uses the ns3 simulator to emulate an 80211n wireless channel.
It assume no interference between base stations, and thus the emulated
channel corresponds to a single base station.
"""
__package_names__ = ['wifi-emulator']
__app_name__ = 'wifi_emulator'
#---------------------------------------------------------------------------
# Attribute handlers
#---------------------------------------------------------------------------
async def _add_station(self, station):
from vicn.resource.lxd.lxc_container import LxcContainer
from vicn.resource.linux.veth_pair import VethPair
from vicn.resource.linux.tap_device import TapChannel
from vicn.resource.linux.macvlan import MacVlan
interfaces = list()
if not station.managed:
sta_if = None
else:
if isinstance(station, LxcContainer):
host = NetDevice(node = station.node,
device_name='vhh-' + station.name + '-' + self.name,
managed = False)
sta_if = VethPair(node = station,
name = 'vh-' + station.name + '-' + self.name,
device_name = 'vh-' + station.name + '-' + self.name,
host = host,
owner = self)
bridged_sta = sta_if.host
else:
raise NotImplementedError
if sta_if:
self._sta_ifs[station] = sta_if
self._sta_bridged[station] = bridged_sta
interfaces.append(sta_if)
self._state.manager.commit_resource(sta_if)
sta_tap = TapChannel(node = self.node,
owner = self,
device_name = 'tap-' + station.name + '-' + self.name,
up = True,
promiscuous = True,
station_name = station.name,
channel_name = self.name)
self._sta_taps[station] = sta_tap
interfaces.append(sta_tap)
self._state.manager.commit_resource(sta_tap)
# Wait for interfaces to be setup
await wait_resources(interfaces)
# Add interfaces to bridge
# One vlan per station is needed to avoid broadcast loops
vlan = AddressManager().get('vlan', sta_tap)
# sta_tap choosen because always there
if sta_if:
sta_if.set('channel', self)
task = self.node.bridge._remove_interface(bridged_sta)
await run_task(task, self._state.manager)
task = self.node.bridge._add_interface(bridged_sta,
vlan = vlan)
await run_task(task, self._state.manager)
task = self.node.bridge._add_interface(sta_tap, vlan = vlan)
await run_task(task, self._state.manager)
def _get_cmdline_params(self, ):
# sta-macs and sta-list for unmanaged stations
sta_list = list() # list of identifiers
sta_macs = list() # list of macs
sta_taps = list()
for station in self.stations:
if not station.managed:
interface = [i for i in station.interfaces if i.channel == self]
assert len(interface) == 1
interface = interface[0]
sta_list.append(interface.name)
sta_macs.append(interface.mac_address)
else:
identifier = self._sta_ifs[station]._state.uuid._uuid
sta_list.append(identifier)
mac = self._sta_ifs[station].mac_address
sta_macs.append(mac)
tap = self._sta_taps[station].device_name
sta_taps.append(tap)
params = {
# Name of the tap between NS3 and the base station
'bs-tap' : self._ap_tap.device_name,
# Number of stations
'n-sta' : len(self._sta_taps),
# List of the stations of the simulation # identifiers
'sta-list' : ','.join(sta_list),
# List of the taps between NS3 and the mobile stations
'sta-taps' : ','.join(sta_taps),
# List of the macs of the mobile stations
'sta-macs' : ','.join(sta_macs),
# X position of the Base Station
'bs-x' : 0, #self.ap.x,
# Y position of the Base Station
'bs-y' : 0, #self.ap.y,
# Experiment ID
'experiment-id' : 'vicn',
# Index of the base station
'bs-name' : self._ap_tap.device_name,
# Base station MAC address
'bs-mac' : self._ap_if.mac_address,
# Control port for dynamically managing the stations movement
'control-port' : self.control_port,
}
return ' '.join(['--{}={}'.format(k, v) for k, v in params.items()])
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