2c1df9bd90
The hwsim code here can only compile with a very specific kernel version, but is shipped with current kernels so you just need to enable it in your kernel instead.
61 lines
2.6 KiB
Text
61 lines
2.6 KiB
Text
mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
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Copyright (c) 2008, Jouni Malinen <j@w1.fi>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation.
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Introduction
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mac80211_hwsim is a Linux kernel module that can be used to simulate
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arbitrary number of IEEE 802.11 radios for mac80211 on a single
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device. It can be used to test most of the mac80211 functionality and
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user space tools (e.g., hostapd and wpa_supplicant) in a way that
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matches very closely with the normal case of using real WLAN
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hardware. From the mac80211 view point, mac80211_hwsim is yet another
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hardware driver, i.e., no changes to mac80211 are needed to use this
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testing tool.
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The main goal for mac80211_hwsim is to make it easier for developers
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to test their code and work with new features to mac80211, hostapd,
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and wpa_supplicant. The simulated radios do not have the limitations
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of real hardware, so it is easy to generate an arbitrary test setup
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and always reproduce the same setup for future tests. In addition,
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since all radio operation is simulated, any channel can be used in
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tests regardless of regulatory rules.
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mac80211_hwsim kernel module has a parameter 'radios' that can be used
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to select how many radios are simulates (default 2). This allows
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configuration of both very simply setups (e.g., just a single access
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point and a station) or large scale tests (multiple access points with
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hundreds of stations).
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mac80211_hwsim works by tracking the current channel of each virtual
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radio and copying all transmitted frames to all other radios that are
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currently enabled and on the same channel as the transmitting
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radio. Software encryption in mac80211 is used so that the frames are
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actually encrypted over the virtual air interface to allow more
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complete testing of encryption.
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A global monitoring netdev, hwsim#, is created independent of
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mac80211. This interface can be used to monitor all transmitted frames
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regardless of channel.
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Simple example
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This example shows how to use mac80211_hwsim to simulate two radios:
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one to act as an access point and the other as a station that
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associates with the AP. hostapd and wpa_supplicant are used to take
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care of WPA2-PSK authentication. In addition, hostapd is also
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processing access point side of association.
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# Load the module (needs to be built into your kernel)
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modprobe mac80211_hwsim
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# Run hostapd (AP) for wlan0
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hostapd hostapd.conf
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# Run wpa_supplicant (station) for wlan1
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wpa_supplicant -Dwext -iwlan1 -c wpa_supplicant.conf
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