mirror of
https://github.com/vanhoefm/fragattacks.git
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8a5cc2fe38
The new HWSimRadio context manager allows the following
syntax to create (and appropriately destroy) a new radio:
with HWSimRadio([...]) as (radio_id, iface_name):
[...]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
115 lines
4.5 KiB
Python
115 lines
4.5 KiB
Python
#
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# HWSIM generic netlink controller code
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# Copyright (c) 2014 Intel Corporation
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#
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# Author: Johannes Berg <johannes.berg@intel.com>
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#
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# This software may be distributed under the terms of the BSD license.
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# See README for more details.
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import netlink, os
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# constants
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HWSIM_CMD_CREATE_RADIO = 4
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HWSIM_CMD_DESTROY_RADIO = 5
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HWSIM_ATTR_CHANNELS = 9
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HWSIM_ATTR_RADIO_ID = 10
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HWSIM_ATTR_SUPPORT_P2P_DEVICE = 14
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HWSIM_ATTR_USE_CHANCTX = 15
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# the controller class
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class HWSimController(object):
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def __init__(self):
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self._conn = netlink.Connection(netlink.NETLINK_GENERIC)
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self._fid = netlink.genl_controller.get_family_id('MAC80211_HWSIM')
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def create_radio(self, n_channels=None, use_chanctx=False,
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use_p2p_device=False):
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attrs = []
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if n_channels:
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attrs.append(netlink.U32Attr(HWSIM_ATTR_CHANNELS, n_channels))
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if use_chanctx:
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attrs.append(netlink.FlagAttr(HWSIM_ATTR_USE_CHANCTX))
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if use_p2p_device:
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attrs.append(netlink.FlagAttr(HWSIM_ATTR_SUPPORT_P2P_DEVICE))
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msg = netlink.GenlMessage(self._fid, HWSIM_CMD_CREATE_RADIO,
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flags = netlink.NLM_F_REQUEST |
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netlink.NLM_F_ACK,
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attrs = attrs)
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return msg.send_and_recv(self._conn).ret
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def destroy_radio(self, radio_id):
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attrs = [netlink.U32Attr(HWSIM_ATTR_RADIO_ID, radio_id)]
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msg = netlink.GenlMessage(self._fid, HWSIM_CMD_DESTROY_RADIO,
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flags = netlink.NLM_F_REQUEST |
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netlink.NLM_F_ACK,
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attrs = attrs)
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msg.send_and_recv(self._conn)
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class HWSimRadio(object):
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def __init__(self, n_channels=None, use_chanctx=False,
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use_p2p_device=False):
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self._controller = HWSimController()
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self._n_channels = n_channels
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self._use_chanctx = use_chanctx
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self._use_p2p_dev = use_p2p_device
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def __enter__(self):
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self._radio_id = self._controller.create_radio(
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n_channels=self._n_channels,
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use_chanctx=self._use_chanctx,
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use_p2p_device=self._use_p2p_dev)
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if self._radio_id < 0:
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raise Exception("Failed to create radio (err:%d)" % self._radio_id)
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try:
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iface = os.listdir('/sys/class/mac80211_hwsim/hwsim%d/net/' % self._radio_id)[0]
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except Exception,e:
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self._controller.destroy_radio(self._radio_id)
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raise e
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return self._radio_id, iface
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def __exit__(self, type, value, traceback):
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self._controller.destroy_radio(self._radio_id)
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def create(args):
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print 'Created radio %d' % c.create_radio(n_channels=args.channels,
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use_chanctx=args.chanctx)
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def destroy(args):
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print c.destroy_radio(args.radio)
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if __name__ == '__main__':
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import argparse
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c = HWSimController()
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parser = argparse.ArgumentParser(description='send hwsim control commands')
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subparsers = parser.add_subparsers(help="Commands", dest='command')
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parser_create = subparsers.add_parser('create', help='create a radio')
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parser_create.add_argument('--channels', metavar='<number_of_channels>', type=int,
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default=0,
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help='Number of concurrent channels supported ' +
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'by the radio. If not specified, the number ' +
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'of channels specified in the ' +
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'mac80211_hwsim.channels module parameter is ' +
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'used')
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parser_create.add_argument('--chanctx', action="store_true",
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help='Use channel contexts, regardless of ' +
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'whether the number of channels is 1 or ' +
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'greater. By default channel contexts are ' +
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'only used if the number of channels is ' +
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'greater than 1.')
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parser_create.set_defaults(func=create)
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parser_destroy = subparsers.add_parser('destroy', help='destroy a radio')
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parser_destroy.add_argument('radio', metavar='<radio>', type=int,
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default=0,
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help='The number of the radio to be ' +
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'destroyed (i.e., 0 for phy0, 1 for phy1...)')
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parser_destroy.set_defaults(func=destroy)
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args = parser.parse_args()
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args.func(args)
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