From acc1e7a3007ec1940374206a84465c1e0cfcda09 Mon Sep 17 00:00:00 2001 From: Jouni Malinen Date: Wed, 11 Jun 2008 10:42:31 +0300 Subject: mac80211_hwsim: 802.11 radio simulator for mac80211 mac80211_hwsim is a Linux kernel module that can be used to simulate arbitrary number of IEEE 802.11 radios for mac80211 on a single device. It can be used to test most of the mac80211 functionality and user space tools (e.g., hostapd and wpa_supplicant) in a way that matches very closely with the normal case of using real WLAN hardware. From the mac80211 view point, mac80211_hwsim is yet another hardware driver, i.e., no changes to mac80211 are needed to use this testing tool. Signed-off-by: Jouni Malinen Acked-by: Johannes Berg Signed-off-by: John W. Linville --- Documentation/networking/mac80211_hwsim/README | 68 ++++++++++++++++++++++ .../networking/mac80211_hwsim/hostapd.conf | 11 ++++ .../networking/mac80211_hwsim/wpa_supplicant.conf | 10 ++++ 3 files changed, 89 insertions(+) create mode 100644 Documentation/networking/mac80211_hwsim/README create mode 100644 Documentation/networking/mac80211_hwsim/hostapd.conf create mode 100644 Documentation/networking/mac80211_hwsim/wpa_supplicant.conf (limited to 'Documentation/networking') diff --git a/Documentation/networking/mac80211_hwsim/README b/Documentation/networking/mac80211_hwsim/README new file mode 100644 index 000000000000..2f6e90fcb5a7 --- /dev/null +++ b/Documentation/networking/mac80211_hwsim/README @@ -0,0 +1,68 @@ +mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211 +Copyright (c) 2008, Jouni Malinen + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License version 2 as +published by the Free Software Foundation. + + +Introduction + +mac80211_hwsim is a Linux kernel module that can be used to simulate +arbitrary number of IEEE 802.11 radios for mac80211 on a single +device. It can be used to test most of the mac80211 functionality and +user space tools (e.g., hostapd and wpa_supplicant) in a way that +matches very closely with the normal case of using real WLAN +hardware. From the mac80211 view point, mac80211_hwsim is yet another +hardware driver, i.e., no changes to mac80211 are needed to use this +testing tool. + +The main goal for mac80211_hwsim is to make it easier for developers +to test their code and work with new features to mac80211, hostapd, +and wpa_supplicant. The simulated radios do not have the limitations +of real hardware, so it is easy to generate an arbitrary test setup +and always reproduce the same setup for future tests. In addition, +since all radio operation is simulated, any channel can be used in +tests regardless of regulatory rules. + +mac80211_hwsim kernel module has a parameter 'radios' that can be used +to select how many radios are simulates (default 2). This allows +configuration of both very simply setups (e.g., just a single access +point and a station) or large scale tests (multiple access points with +hundreds of stations). + +mac80211_hwsim works by tracking the current channel of each virtual +radio and copying all transmitted frames to all other radios that are +currently enabled and on the same channel as the transmitting +radio. Software encryption in mac80211 is used so that the frames are +actually encrypted over the virtual air interface to allow more +complete testing of encryption. + +A global monitoring netdev, hwsim#, is created independent of +mac80211. This interface can be used to monitor all transmitted frames +regardless of channel. + + +Simple example + +This example shows how to use mac80211_hwsim to simulate two radios: +one to act as an access point and the other as a station that +associates with the AP. hostapd and wpa_supplicant are used to take +care of WPA2-PSK authentication. In addition, hostapd is also +processing access point side of association. + +Please note that the current Linux kernel does not enable AP mode, so a +simple patch is needed to enable AP mode selection: +http://johannes.sipsolutions.net/patches/kernel/all/LATEST/006-allow-ap-vlan-modes.patch + + +# Build mac80211_hwsim as part of kernel configuration + +# Load the module +modprobe mac80211_hwsim + +# Run hostapd (AP) for wlan0 +hostapd hostapd.conf + +# Run wpa_supplicant (station) for wlan1 +wpa_supplicant -Dwext -iwlan1 -c wpa_supplicant.conf diff --git a/Documentation/networking/mac80211_hwsim/hostapd.conf b/Documentation/networking/mac80211_hwsim/hostapd.conf new file mode 100644 index 000000000000..08cde7e35f2e --- /dev/null +++ b/Documentation/networking/mac80211_hwsim/hostapd.conf @@ -0,0 +1,11 @@ +interface=wlan0 +driver=nl80211 + +hw_mode=g +channel=1 +ssid=mac80211 test + +wpa=2 +wpa_key_mgmt=WPA-PSK +wpa_pairwise=CCMP +wpa_passphrase=12345678 diff --git a/Documentation/networking/mac80211_hwsim/wpa_supplicant.conf b/Documentation/networking/mac80211_hwsim/wpa_supplicant.conf new file mode 100644 index 000000000000..299128cff035 --- /dev/null +++ b/Documentation/networking/mac80211_hwsim/wpa_supplicant.conf @@ -0,0 +1,10 @@ +ctrl_interface=/var/run/wpa_supplicant + +network={ + ssid="mac80211 test" + psk="12345678" + key_mgmt=WPA-PSK + proto=WPA2 + pairwise=CCMP + group=CCMP +} -- cgit v1.2.2