openwrt-owl/package/mac80211/files/lib/wifi/mac80211.sh

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#!/bin/sh
append DRIVERS "mac80211"
find_mac80211_phy() {
config_get device "$1"
local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
config_get phy "$device" phy
[ -z "$phy" -a -n "$macaddr" ] && {
for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
[ "$macaddr" = "$(cat /sys/class/ieee80211/${phy}/macaddress)" ] || continue
config_set "$device" phy "$phy"
break
done
config_get phy "$device" phy
}
[ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
echo "PHY for wifi device $1 not found"
return 1
}
[ -z "$macaddr" ] && {
config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
}
return 0
}
scan_mac80211() {
local device="$1"
local adhoc sta ap monitor mesh
config_get vifs "$device" vifs
for vif in $vifs; do
config_get mode "$vif" mode
case "$mode" in
adhoc|sta|ap|monitor|mesh)
append $mode "$vif"
;;
*) echo "$device($vif): Invalid mode, ignored."; continue;;
esac
done
config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
}
disable_mac80211() (
local device="$1"
find_mac80211_phy "$device" || return 0
config_get phy "$device" phy
set_wifi_down "$device"
# kill all running hostapd and wpa_supplicant processes that
# are running on atheros/mac80211 vifs
for pid in `pidof hostapd wpa_supplicant`; do
grep wlan /proc/$pid/cmdline >/dev/null && \
kill $pid
done
include /lib/network
for wdev in $(ls /sys/class/ieee80211/${phy}/device/net 2>/dev/null); do
ifconfig "$wdev" down 2>/dev/null
unbridge "$dev"
iw dev "$wdev" del
done
return 0
)
get_freq() {
local phy="$1"
local channel="$2"
iw "$phy" info | grep -E -m1 "(\* ${channel:-....} MHz${channel:+|\\[$channel\\]})" | grep MHz | awk '{print $2}'
}
enable_mac80211() {
local device="$1"
config_get channel "$device" channel
config_get vifs "$device" vifs
config_get txpower "$device" txpower
find_mac80211_phy "$device" || return 0
config_get phy "$device" phy
local i=0
# convert channel to frequency
local freq="$(get_freq "$phy" "$channel")"
wifi_fixup_hwmode "$device" "g"
for vif in $vifs; do
while [ -d "/sys/class/net/wlan$i" ]; do
i=$(($i + 1))
done
config_get ifname "$vif" ifname
[ -n "$ifname" ] || {
ifname="wlan$i"
}
config_set "$vif" ifname "$ifname"
config_get enc "$vif" encryption
config_get mode "$vif" mode
config_get ssid "$vif" ssid
# It is far easier to delete and create the desired interface
case "$mode" in
adhoc)
iw phy "$phy" interface add "$ifname" type adhoc
;;
ap)
# Hostapd will handle recreating the interface and
# it's accompanying monitor
iw phy "$phy" interface add "$ifname" type managed
;;
mesh)
config_get mesh_id "$vif" mesh_id
iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
;;
monitor)
iw phy "$phy" interface add "$ifname" type monitor
;;
sta)
iw phy "$phy" interface add "$ifname" type managed
;;
esac
# All interfaces must have unique mac addresses
# which can either be explicitly set in the device
# section, or automatically generated
config_get macaddr "$device" macaddr
local mac_1="${macaddr%%:*}"
local mac_2="${macaddr#*:}"
config_get vif_mac "$vif" macaddr
[ -n "$vif_mac" ] || {
if [ "$i" -gt 0 ]; then
offset="$(( 2 + $i * 4 ))"
else
offset="0"
fi
vif_mac="$( printf %02x $(($mac_1 + $offset)) ):$mac_2"
}
ifconfig "$ifname" hw ether "$vif_mac"
# We attempt to set teh channel for all interfaces, although
# mac80211 may not support it or the driver might not yet
[ -z "$channel" ] || iw dev "$ifname" set channel "$channel"
local key keystring
# Valid values are:
# wpa / wep / none
#
# !! ap !!
#
# ALL ap functionality will be passed to hostapd
#
# !! mesh / adhoc / station !!
# none -> NO encryption
#
# wep + keymgmt = '' -> we use iw to connect to the
# network.
#
# wep + keymgmt = 'NONE' -> wpa_supplicant will be
# configured to handle the wep connection
if [ ! "$mode" = "ap" ]; then
case "$enc" in
wep)
config_get keymgmt "$vif" keymgmt
if [ -e "$keymgmt" ]; then
for idx in 1 2 3 4; do
local zidx
zidx = idx - 1
config_get key "$vif" "key${idx}"
if [ -n "$key" ]; then
append keystring "${zidx}:${key} "
fi
done
fi
;;
wpa)
config_get key "$vif" key
;;
esac
fi
# txpower is not yet implemented in iw
config_get vif_txpower "$vif" txpower
# use vif_txpower (from wifi-iface) to override txpower (from
# wifi-device) if the latter doesn't exist
txpower="${txpower:-$vif_txpower}"
[ -z "$txpower" ] || iwconfig "$ifname" txpower "${txpower%%.*}"
config_get frag "$vif" frag
if [ -n "$frag" ]; then
iw phy "$phy" set frag "${frag%%.*}"
fi
config_get rts "$vif" rts
if [ -n "$rts" ]; then
iw phy "$phy" set rts "${frag%%.*}"
fi
ifconfig "$ifname" up
local net_cfg bridge
net_cfg="$(find_net_config "$vif")"
[ -z "$net_cfg" ] || {
bridge="$(bridge_interface "$net_cfg")"
config_set "$vif" bridge "$bridge"
start_net "$ifname" "$net_cfg"
}
set_wifi_up "$vif" "$ifname"
case "$mode" in
ap)
if eval "type hostapd_setup_vif" 2>/dev/null >/dev/null; then
hostapd_setup_vif "$vif" nl80211 || {
echo "enable_mac80211($device): Failed to set up wpa for interface $ifname" >&2
# make sure this wifi interface won't accidentally stay open without encryption
ifconfig "$ifname" down
continue
}
fi
;;
adhoc)
config_get bssid "$vif" bssid
iw dev "$ifname" ibss join "$ssid" ${freq:+$freq fixed-freq} $bssid
;;
sta|mesh)
# Fixup... sometimes you have to scan to get beaconing going
iw dev "$ifname" scan &> /dev/null
case "$enc" in
wep)
if [ -e "$keymgmt" ]; then
[ -n "$keystring" ] &&
iw dev "$ifname" connect "$ssid" key "$keystring"
else
if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
wpa_supplicant_setup_vif "$vif" wext || {
echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
# make sure this wifi interface won't accidentally stay open without encryption
ifconfig "$ifname" down
continue
}
fi
fi
;;
wpa)
if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
wpa_supplicant_setup_vif "$vif" wext || {
echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
# make sure this wifi interface won't accidentally stay open without encryption
ifconfig "$ifname" down
continue
}
fi
;;
esac
;;
esac
done
}
check_device() {
config_get phy "$1" phy
[ -z "$phy" ] && {
find_mac80211_phy "$1" || return 0
config_get phy "$1" phy
}
[ "$phy" = "$dev" ] && found=1
}
detect_mac80211() {
devidx=0
config_load wireless
for dev in $(ls /sys/class/ieee80211); do
found=0
config_foreach check_device wifi-device
[ "$found" -gt 0 ] && continue
while :; do
config_get type "wifi$devidx" type
[ -n "$type" ] || break
devidx=$(($devidx + 1))
done
mode_11n=""
mode_band="g"
iw phy "$dev" info | grep -q 'HT cap' && mode_11n="n"
iw phy "$dev" info | grep -q '2412 MHz' || mode_band="a"
cat <<EOF
config wifi-device wifi$devidx
option type mac80211
option channel 5
option macaddr $(cat /sys/class/ieee80211/${dev}/macaddress)
option hwmode 11${mode_11n}${mode_band}
# REMOVE THIS LINE TO ENABLE WIFI:
option disabled 1
config wifi-iface
option device wifi$devidx
option network lan
option mode ap
option ssid OpenWrt
option encryption none
EOF
done
}