The WiFi settings are configured in the file \texttt{/etc/config/wireless} (currently supported on Broadcom and Atheros). When booting the router for the first time it should detect your card and create a sample configuration file. By default '\texttt{option network lan}' is commented. This prevents unsecured sharing of the network over the wireless interface. 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. The reason for using such architecture, is that it abstracts the driver configuration. \paragraph{Generic Broadcom wireless config:} \begin{Verbatim} config wifi-device "wl0" option type "broadcom" option channel "5" config wifi-iface option device "wl0" # option network lan option mode "ap" option ssid "OpenWrt" option hidden "0" option encryption "none" \end{Verbatim} \paragraph{Generic Atheros wireless config:} \begin{Verbatim} config wifi-device "wifi0" option type "atheros" option channel "5" option agmode "11g" config wifi-iface option device "wifi0" # option network lan option mode "ap" option ssid "OpenWrt" option hidden "0" option encryption "none" \end{Verbatim} \paragraph{Generic multi-radio Atheros wireless config:} \begin{Verbatim} config wifi-device wifi0 option type atheros option channel 1 config wifi-iface option device wifi0 # option network lan option mode ap option ssid OpenWrt_private option hidden 0 option encryption none config wifi-device wifi1 option type atheros option channel 11 config wifi-iface option device wifi1 # option network lan option mode ap option ssid OpenWrt_public option hidden 1 option encryption none \end{Verbatim} There are two types of config sections in this file. The '\texttt{wifi-device}' refers to the physical wifi interface and '\texttt{wifi-iface}' configures a virtual interface on top of that (if supported by the driver). 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 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-iface option network the interface you want wifi to bridge with option device wifi0, wifi1, wifi2, wifiN option mode ap, sta, adhoc, or wds option ssid ssid name option bssid bssid address 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 server ip address option port port option hidden 0,1 option isolate 0,1 \end{Verbatim} \paragraph{Options for the \texttt{wifi-device}:} \begin{itemize} \item \texttt{type} \\ The driver to use for this interface. \item \texttt{country} \\ The country code used to determine the regulatory settings. \item \texttt{channel} \\ 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. \item \texttt{distance} \\ Optional: Distance between the ap and the furthest client in meters. This feature is supported only on the atheros chipset. \item \texttt{mode} \\ The frequency band (\texttt{b}, \texttt{g}, \texttt{bg}, \texttt{a}). This feature is only supported on the atheros chipset. \end{itemize} \paragraph{Options for the \texttt{wifi-iface}:} \begin{itemize} \item \texttt{network} \\ Selects the interface section from \texttt{/etc/config/network} to be used with this interface \item \texttt{device} \\ Set the wifi device name. \item \texttt{mode} \\ Operating mode: \begin{itemize} \item \texttt{ap} \\ Access point mode \item \texttt{sta} \\ Client mode \item \texttt{adhoc} \\ Ad-Hoc mode \item \texttt{wds} \\ WDS point-to-point link \end{itemize} \item \texttt{ssid} Set the SSID to be used on the wifi device. \item \texttt{bssid} Set the BSSID address to be used for wds to set the mac address of the other wds unit. \item \texttt{encryption} \\ Encryption setting. Accepts the following values: \begin{itemize} \item \texttt{none} \item \texttt{wep} \item \texttt{psk}, \texttt{psk2} \\ 
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