Each wireless driver has its own configuration script in \texttt{/lib/wifi/driver\_name.sh} which handles
driver specific options and configurations. This script is also calling driver specific binaries like wlc for
-Broadcom, or hostapd and wpa\_supplicant for atheros.
+Broadcom, or hostapd and wpa\_supplicant for atheros and mac80211.
The reason for using such architecture, is that it abstracts the driver configuration.
config wifi-device "wifi0"
option type "atheros"
option channel "5"
- option agmode "11g"
+ option hwmode "11g"
config wifi-iface
option device "wifi0"
A full outline of the wireless configuration file with description of each field:
\begin{Verbatim}
-config wifi-device wifi device name
- option type broadcom, atheros, mac80211
- option country us, uk, fr, de, etc.
- option channel 1-14
- option maxassoc 1-128 (broadcom only)
- option distance 1-n
- option agmode 11b, 11g, 11a, 11bg (atheros only)
+config wifi-device wifi device name
+ option type broadcom, atheros, mac80211
+ option country us, uk, fr, de, etc.
+ option channel 1-14
+ option maxassoc 1-128 (broadcom only)
+ option distance 1-n (meters)
+ option hwmode 11b, 11g, 11a, 11bg (atheros, mac80211)
+ option rxantenna 0,1,2 (atheros, broadcom)
+ option txantenna 0,1,2 (atheros, broadcom)
+ option txpower transmission power in dBm
config wifi-iface
- option network the interface you want wifi to bridge with
+ option network the interface you want wifi to bridge with
option device wifi0, wifi1, wifi2, wifiN
- option mode ap, sta, adhoc, monitor, or wds
+ option mode ap, sta, adhoc, monitor, mesh, or wds
+ option txpower (deprecated) transmission power in dBm
option ssid ssid name
option bssid bssid address
- option encryption none, wep, psk, psk2, wpa, wpa2
+ option encryption none, wep, psk, psk2, wpa, wpa2
option key encryption key
option key1 key 1
option key2 key 2
option key3 key 3
option key4 key 4
+ option passphrase 0,1
option server ip address
option port port
option hidden 0,1
- option isolate 0,1
+ option isolate 0,1 (broadcom)
+ option doth 0,1 (atheros, broadcom)
+ option wmm 0,1 (atheros, broadcom)
\end{Verbatim}
\paragraph{Options for the \texttt{wifi-device}:}
The wifi channel (e.g. 1-14, depending on your country setting).
\item \texttt{maxassoc} \\
- Optional: Maximum number of associated clients. This feature is supported only on the broadcom chipset.
+ Optional: Maximum number of associated clients. This feature is supported only on the Broadcom chipsets.
\item \texttt{distance} \\
- Optional: Distance between the ap and the furthest client in meters. This feature is supported only on the atheros chipset.
+ Optional: Distance between the ap and the furthest client in meters. This feature is supported only on the Atheros chipsets.
\item \texttt{mode} \\
- The frequency band (\texttt{b}, \texttt{g}, \texttt{bg}, \texttt{a}). This feature is only supported on the atheros chipset.
+ The frequency band (\texttt{b}, \texttt{g}, \texttt{bg}, \texttt{a}). This feature is only supported on the Atheros chipsets.
+ \item \texttt{diversity} \\
+ Optional: Enable diversity for the Wi-Fi device. This feature is supported only on the Atheros chipsets.
+
+ \item \texttt{rxantenna} \\
+ Optional: Antenna identifier (0, 1 or 2) for reception. This feature is supported by Atheros and some Broadcom chipsets.
+
+ \item \texttt{txantenna} \\
+ Optional: Antenna identifier (0, 1 or 2) for emission. This feature is supported by Atheros and some Broadcom chipsets.
+
+ \item \texttt{txpower}
+ Set the transmission power to be used. The amount is specified in dBm.
\end{itemize}
\item \texttt{monitor} \\
Monitor mode
+ \item \texttt{mesh} \\
+ Mesh Point mode (802.11s)
+
\item \texttt{wds} \\
WDS point-to-point link
\item \texttt{bssid}
Set the BSSID address to be used for wds to set the mac address of the other wds unit.
+ \item \texttt{txpower}
+ (Deprecated, set in wifi-device) Set the transmission power to be used. The amount is specified in dBm.
+
\item \texttt{encryption} \\
Encryption setting. Accepts the following values:
\item \texttt{key, key1, key2, key3, key4} (wep, wpa and psk) \\
WEP key, WPA key (PSK mode) or the RADIUS shared secret (WPA RADIUS mode)
+ \item \texttt{passphrase} (wpa) \\
+ 0 treats the wpa psk as a text passphrase; 1 treats wpa psk as
+ encoded passphrase. You can generate an encoded passphrase with
+ the wpa\_passphrase utility. This is especially useful if your
+ passphrase contains special characters. This option only works
+ when using mac80211 or atheros type devices.
+
\item \texttt{server} (wpa) \\
The RADIUS server ip address
Optional: Isolation is a mode usually set on hotspots that limits the clients to communicate only with the AP and not with other wireless clients.
0 disables ap isolation (default); 1 enables ap isolation.
+ \item \texttt{doth} \\
+ Optional: Toggle 802.11h mode.
+ 0 disables 802.11h (default); 1 enables it.
+
+ \item \texttt{wmm} \\
+ Optional: Toggle 802.11e mode.
+ 0 disables 802.11e (default); 1 enables it.
+
\end{itemize}
+\paragraph{Mesh Point}
+
+Mesh Point (802.11s) is only supported by some mac80211 drivers. It requires the iw package
+to be installed to setup mesh links. OpenWrt creates mshN mesh point interfaces. A sample
+configuration looks like this:
+
+\begin{Verbatim}
+config wifi-device "wlan0"
+ option type "mac80211"
+ option channel "5"
+
+config wifi-iface
+ option device "wlan0"
+ option network lan
+ option mode "mesh"
+ option mesh_id "OpenWrt"
+\end{Verbatim}
+
\paragraph{Wireless Distribution System}
WDS is a non-standard mode which will be working between two Broadcom devices for instance
option key "<psk for WDS>"
\end{Verbatim}
+\paragraph{802.1x configurations}
+
+OpenWrt supports both 802.1x client and Access Point
+configurations. 802.1x client is only working with
+drivers supported by wpa-supplicant. Configuration
+only supports EAP types TLS, TTLS or PEAP.
+
+\subparagraph{EAP-TLS}
+
+\begin{Verbatim}
+config wifi-iface
+ option device "ath0"
+ option network lan
+ option ssid OpenWrt
+ option eap_type tls
+ option ca_cert "/etc/config/certs/ca.crt"
+ option priv_key "/etc/config/certs/priv.crt"
+ option priv_key_pwd "PKCS#12 passphrase"
+\end{Verbatim}
+
+\subparagraph{EAP-PEAP}
+
+\begin{Verbatim}
+config wifi-iface
+ option device "ath0"
+ option network lan
+ option ssid OpenWrt
+ option eap_type peap
+ option ca_cert "/etc/config/certs/ca.crt"
+ option auth MSCHAPV2
+ option identity username
+ option password password
+\end{Verbatim}
\paragraph{Limitations:}
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