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#
# HWSIM generic netlink controller code
# Copyright (c) 2014 Intel Corporation
#
# Author: Johannes Berg <johannes.berg@intel.com>
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
import netlink, os
# constants
HWSIM_CMD_CREATE_RADIO = 4
HWSIM_CMD_DESTROY_RADIO = 5
HWSIM_ATTR_CHANNELS = 9
HWSIM_ATTR_RADIO_ID = 10
HWSIM_ATTR_SUPPORT_P2P_DEVICE = 14
HWSIM_ATTR_USE_CHANCTX = 15
# the controller class
class HWSimController(object):
def __init__(self):
self._conn = netlink.Connection(netlink.NETLINK_GENERIC)
self._fid = netlink.genl_controller.get_family_id(b'MAC80211_HWSIM')
def create_radio(self, n_channels=None, use_chanctx=False,
use_p2p_device=False):
attrs = []
if n_channels:
attrs.append(netlink.U32Attr(HWSIM_ATTR_CHANNELS, n_channels))
if use_chanctx:
attrs.append(netlink.FlagAttr(HWSIM_ATTR_USE_CHANCTX))
if use_p2p_device:
attrs.append(netlink.FlagAttr(HWSIM_ATTR_SUPPORT_P2P_DEVICE))
msg = netlink.GenlMessage(self._fid, HWSIM_CMD_CREATE_RADIO,
flags=netlink.NLM_F_REQUEST |
netlink.NLM_F_ACK,
attrs=attrs)
return msg.send_and_recv(self._conn).ret
def destroy_radio(self, radio_id):
attrs = [netlink.U32Attr(HWSIM_ATTR_RADIO_ID, radio_id)]
msg = netlink.GenlMessage(self._fid, HWSIM_CMD_DESTROY_RADIO,
flags=netlink.NLM_F_REQUEST |
netlink.NLM_F_ACK,
attrs=attrs)
msg.send_and_recv(self._conn)
class HWSimRadio(object):
def __init__(self, n_channels=None, use_chanctx=False,
use_p2p_device=False):
self._controller = HWSimController()
self._n_channels = n_channels
self._use_chanctx = use_chanctx
self._use_p2p_dev = use_p2p_device
def __enter__(self):
self._radio_id = self._controller.create_radio(
n_channels=self._n_channels,
use_chanctx=self._use_chanctx,
use_p2p_device=self._use_p2p_dev)
if self._radio_id < 0:
raise Exception("Failed to create radio (err:%d)" % self._radio_id)
try:
iface = os.listdir('/sys/class/mac80211_hwsim/hwsim%d/net/' % self._radio_id)[0]
except Exception as e:
self._controller.destroy_radio(self._radio_id)
raise e
return self._radio_id, iface
def __exit__(self, type, value, traceback):
self._controller.destroy_radio(self._radio_id)
def create(args):
print('Created radio %d' % c.create_radio(n_channels=args.channels,
use_chanctx=args.chanctx))
def destroy(args):
print(c.destroy_radio(args.radio))
if __name__ == '__main__':
import argparse
c = HWSimController()
parser = argparse.ArgumentParser(description='send hwsim control commands')
subparsers = parser.add_subparsers(help="Commands", dest='command')
parser_create = subparsers.add_parser('create', help='create a radio')
parser_create.add_argument('--channels', metavar='<number_of_channels>', type=int,
default=0,
help='Number of concurrent channels supported ' +
'by the radio. If not specified, the number ' +
'of channels specified in the ' +
'mac80211_hwsim.channels module parameter is ' +
'used')
parser_create.add_argument('--chanctx', action="store_true",
help='Use channel contexts, regardless of ' +
'whether the number of channels is 1 or ' +
'greater. By default channel contexts are ' +
'only used if the number of channels is ' +
'greater than 1.')
parser_create.set_defaults(func=create)
parser_destroy = subparsers.add_parser('destroy', help='destroy a radio')
parser_destroy.add_argument('radio', metavar='<radio>', type=int,
default=0,
help='The number of the radio to be ' +
'destroyed (i.e., 0 for phy0, 1 for phy1...)')
parser_destroy.set_defaults(func=destroy)
args = parser.parse_args()
args.func(args)
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