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

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#!/bin/sh
append DRIVERS "mac80211"
mac80211_hostapd_setup_base() {
local phy="$1"
local ifname="$2"
cfgfile="/var/run/hostapd-$phy.conf"
config_get device "$vif" device
config_get country "$device" country
config_get hwmode "$device" hwmode
config_get channel "$device" channel
config_get beacon_int "$device" beacon_int
config_get basic_rate_list "$device" basic_rate
config_get_bool noscan "$device" noscan
hostapd_set_log_options base_cfg "$device"
[ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
[ "$channel" = auto ] && {
channel=$(iw phy "$phy" info | \
sed -ne '/MHz/ { /disabled\|passive\|radar/d; s/.*\[//; s/\].*//; p; q }')
config_set "$device" channel "$channel"
}
[ -n "$hwmode" ] && {
config_get hwmode_11n "$device" hwmode_11n
[ -n "$hwmode_11n" ] && {
hwmode="$hwmode_11n"
append base_cfg "ieee80211n=1" "$N"
config_get htmode "$device" htmode
config_get ht_capab_list "$device" ht_capab
case "$htmode" in
HT20|HT40+|HT40-) ht_capab="[$htmode]";;
*)ht_capab=;;
esac
for cap in $ht_capab_list; do
ht_capab="$ht_capab[$cap]"
done
[ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
}
}
local country_ie=0
[ -n "$country" ] && country_ie=1
config_get_bool country_ie "$device" country_ie "$country_ie"
[ "$country_ie" -gt 0 ] && append base_cfg "ieee80211d=1" "$N"
local br brval brstr
[ -n "$basic_rate_list" ] && {
for br in $basic_rate_list; do
brval="$(($br / 100))"
[ -n "$brstr" ] && brstr="$brstr "
brstr="$brstr$brval"
done
}
cat >> "$cfgfile" <<EOF
ctrl_interface=/var/run/hostapd-$phy
driver=nl80211
wmm_ac_bk_cwmin=4
wmm_ac_bk_cwmax=10
wmm_ac_bk_aifs=7
wmm_ac_bk_txop_limit=0
wmm_ac_bk_acm=0
wmm_ac_be_aifs=3
wmm_ac_be_cwmin=4
wmm_ac_be_cwmax=10
wmm_ac_be_txop_limit=0
wmm_ac_be_acm=0
wmm_ac_vi_aifs=2
wmm_ac_vi_cwmin=3
wmm_ac_vi_cwmax=4
wmm_ac_vi_txop_limit=94
wmm_ac_vi_acm=0
wmm_ac_vo_aifs=2
wmm_ac_vo_cwmin=2
wmm_ac_vo_cwmax=3
wmm_ac_vo_txop_limit=47
wmm_ac_vo_acm=0
tx_queue_data3_aifs=7
tx_queue_data3_cwmin=15
tx_queue_data3_cwmax=1023
tx_queue_data3_burst=0
tx_queue_data2_aifs=3
tx_queue_data2_cwmin=15
tx_queue_data2_cwmax=63
tx_queue_data2_burst=0
tx_queue_data1_aifs=1
tx_queue_data1_cwmin=7
tx_queue_data1_cwmax=15
tx_queue_data1_burst=3.0
tx_queue_data0_aifs=1
tx_queue_data0_cwmin=3
tx_queue_data0_cwmax=7
tx_queue_data0_burst=1.5
${hwmode:+hw_mode=$hwmode}
${channel:+channel=$channel}
${beacon_int:+beacon_int=$beacon_int}
${country:+country_code=$country}
${noscan:+noscan=$noscan}
${brstr:+basic_rates=$brstr}
$base_cfg
EOF
}
mac80211_hostapd_setup_bss() {
local phy="$1"
local vif="$2"
hostapd_cfg=
cfgfile="/var/run/hostapd-$phy.conf"
config_get ifname "$vif" ifname
if [ -f "$cfgfile" ]; then
append hostapd_cfg "bss=$ifname" "$N"
else
mac80211_hostapd_setup_base "$phy" "$ifname"
append hostapd_cfg "interface=$ifname" "$N"
fi
local net_cfg bridge
net_cfg="$(find_net_config "$vif")"
[ -z "$net_cfg" ] || bridge="$(bridge_interface "$net_cfg")"
config_set "$vif" bridge "$bridge"
hostapd_set_bss_options hostapd_cfg "$vif"
config_get_bool wds "$vif" wds 0
[ "$wds" -gt 0 ] && append hostapd_cfg "wds_sta=1" "$N"
local macaddr hidden maxassoc wmm
config_get macaddr "$vif" macaddr
config_get maxassoc "$vif" maxassoc
config_get dtim_period "$vif" dtim_period
config_get max_listen_int "$vif" max_listen_int
config_get_bool hidden "$vif" hidden 0
config_get_bool wmm "$vif" wmm 1
cat >> /var/run/hostapd-$phy.conf <<EOF
$hostapd_cfg
wmm_enabled=$wmm
bssid=$macaddr
ignore_broadcast_ssid=$hidden
${dtim_period:+dtim_period=$dtim_period}
${max_listen_int:+max_listen_interval=$max_listen_int}
${maxassoc:+max_num_sta=$maxassoc}
EOF
}
mac80211_start_vif() {
local vif="$1"
local ifname="$2"
local net_cfg
net_cfg="$(find_net_config "$vif")"
[ -z "$net_cfg" ] || start_net "$ifname" "$net_cfg"
set_wifi_up "$vif" "$ifname"
}
lookup_phy() {
[ -n "$phy" ] && {
[ -d /sys/class/ieee80211/$phy ] && return
}
local devpath
config_get devpath "$device" path
[ -n "$devpath" -a -d "/sys/devices/$devpath/ieee80211" ] && {
phy="$(ls /sys/devices/$devpath/ieee80211 | grep -m 1 phy)"
[ -n "$phy" ] && return
}
local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
[ -n "$macaddr" ] && {
for _phy in $(ls /sys/class/ieee80211 2>/dev/null); do
[ "$macaddr" = "$(cat /sys/class/ieee80211/${_phy}/macaddress)" ] || continue
phy="$_phy"
return
done
}
phy=
return
}
find_mac80211_phy() {
local device="$1"
config_get phy "$device" phy
lookup_phy
[ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
echo "PHY for wifi device $1 not found"
return 1
}
config_set "$device" phy "$phy"
config_get macaddr "$device" macaddr
[ -z "$macaddr" ] && {
config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
}
return 0
}
scan_mac80211() {
local device="$1"
local adhoc sta ap monitor mesh disabled
config_get vifs "$device" vifs
for vif in $vifs; do
config_get_bool disabled "$vif" disabled 0
[ $disabled = 0 ] || continue
config_get mode "$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}"
}
list_phy_interfaces() {
local phy="$1"
if [ -d "/sys/class/ieee80211/${phy}/device/net" ]; then
ls "/sys/class/ieee80211/${phy}/device/net" 2>/dev/null;
else
ls "/sys/class/ieee80211/${phy}/device" 2>/dev/null | grep net: | sed -e 's,net:,,g'
fi
}
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`; do
grep -E "$phy" /proc/$pid/cmdline >/dev/null && \
kill $pid
done
include /lib/network
for wdev in $(list_phy_interfaces "$phy"); do
[ -f "/var/run/$wdev.pid" ] && kill $(cat /var/run/$wdev.pid) >&/dev/null 2>&1
for pid in `pidof wpa_supplicant`; do
grep "$wdev" /proc/$pid/cmdline >/dev/null && \
kill $pid
done
ifconfig "$wdev" down 2>/dev/null
unbridge "$dev"
iw dev "$wdev" del
done
return 0
)
get_freq() {
local phy="$1"
local chan="$2"
iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
}
mac80211_generate_mac() {
local off="$1"
local mac="$2"
local mask="$3"
local oIFS="$IFS"; IFS=":"; set -- $mac; IFS="$oIFS"
local b2mask=0x00
[ $off -gt 0 ] &&
[ "$mask" = "00:00:00:00:00:00" -o $(( 0x${mask%%:*} & 0x2 )) -gt 0 ] && b2mask=0x02
printf "%02x:%s:%s:%s:%02x:%02x" \
$(( 0x$1 | $b2mask )) $2 $3 $4 \
$(( (0x$5 + ($off / 0x100)) % 0x100 )) \
$(( (0x$6 + $off) % 0x100 ))
}
enable_mac80211() {
local device="$1"
config_get channel "$device" channel
config_get vifs "$device" vifs
config_get txpower "$device" txpower
config_get country "$device" country
config_get distance "$device" distance
config_get txantenna "$device" txantenna all
config_get rxantenna "$device" rxantenna all
config_get antenna_gain "$device" antenna_gain 0
config_get frag "$device" frag
config_get rts "$device" rts
find_mac80211_phy "$device" || return 0
config_get phy "$device" phy
local i=0
local macidx=0
local apidx=0
fixed=""
local hostapd_ctrl=""
[ -n "$country" ] && {
iw reg get | grep -q "^country $country:" || {
iw reg set "$country"
sleep 1
}
}
config_get chanbw "$device" chanbw
[ -n "$chanbw" -a -d /sys/kernel/debug/ieee80211/$phy/ath9k ] && echo "$chanbw" > /sys/kernel/debug/ieee80211/$phy/ath9k/chanbw
[ -n "$chanbw" -a -d /sys/kernel/debug/ieee80211/$phy/ath5k ] && echo "$chanbw" > /sys/kernel/debug/ieee80211/$phy/ath5k/bwmode
[ "$channel" = "auto" -o "$channel" = "0" ] || {
fixed=1
}
iw phy "$phy" set antenna $txantenna $rxantenna >/dev/null 2>&1
iw phy "$phy" set antenna_gain $antenna_gain
[ -n "$distance" ] && iw phy "$phy" set distance "$distance"
[ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
[ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"
export channel fixed
# convert channel to frequency
local freq="$(get_freq "$phy" "${fixed:+$channel}")"
wifi_fixup_hwmode "$device" "g"
for vif in $vifs; do
config_get ifname "$vif" ifname
[ -n "$ifname" ] || {
[ $i -gt 0 ] && ifname="wlan${phy#phy}-$i" || ifname="wlan${phy#phy}"
}
config_set "$vif" ifname "$ifname"
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 "$ifname" type adhoc
;;
ap)
# Hostapd will handle recreating the interface and
# it's accompanying monitor
apidx="$(($apidx + 1))"
[ "$apidx" -gt 1 ] || 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)
local wdsflag
config_get_bool wds "$vif" wds 0
[ "$wds" -gt 0 ] && wdsflag="4addr on"
iw phy "$phy" interface add "$ifname" type managed $wdsflag
config_get_bool powersave "$vif" powersave 0
[ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
iw "$ifname" set power_save "$powersave"
;;
esac
# All interfaces must have unique mac addresses
# which can either be explicitly set in the device
# section, or automatically generated
config_get macaddr "$device" macaddr
config_get vif_mac "$vif" macaddr
[ -n "$vif_mac" ] || {
vif_mac="$(mac80211_generate_mac $macidx $macaddr $(cat /sys/class/ieee80211/${phy}/address_mask))"
macidx="$(($macidx + 1))"
}
[ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
config_set "$vif" macaddr "$vif_mac"
# !! ap !!
#
# ALL ap functionality will be passed to hostapd
#
# !! station !!
#
# ALL station functionality will be passed to wpa_supplicant
#
if [ ! "$mode" = "ap" ]; then
# We attempt to set the channel for all interfaces, although
# mac80211 may not support it or the driver might not yet
# for ap mode this is handled by hostapd
[ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
fi
i=$(($i + 1))
done
local start_hostapd=
rm -f /var/run/hostapd-$phy.conf
for vif in $vifs; do
config_get mode "$vif" mode
[ "$mode" = "ap" ] || continue
mac80211_hostapd_setup_bss "$phy" "$vif"
start_hostapd=1
done
[ -n "$start_hostapd" ] && {
hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
echo "Failed to start hostapd for $phy"
return
}
sleep 2
for vif in $vifs; do
config_get mode "$vif" mode
config_get ifname "$vif" ifname
[ "$mode" = "ap" ] || continue
hostapd_ctrl="${hostapd_ctrl:-/var/run/hostapd-$phy/$ifname}"
mac80211_start_vif "$vif" "$ifname"
done
}
for vif in $vifs; do
config_get mode "$vif" mode
config_get ifname "$vif" ifname
[ "$mode" = "ap" ] || ifconfig "$ifname" up
config_get vif_txpower "$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 "$txpower" ] || iw dev "$ifname" set txpower fixed "${txpower%%.*}00"
case "$mode" in
adhoc)
config_get bssid "$vif" bssid
config_get ssid "$vif" ssid
config_get beacon_int "$device" beacon_int
config_get basic_rate_list "$device" basic_rate
config_get encryption "$vif" encryption
config_get key "$vif" key 1
config_get mcast_rate "$vif" mcast_rate
config_get htmode "$device" htmode
case "$htmode" in
HT20|HT40+|HT40-) ;;
*) htmode= ;;
esac
local keyspec=""
[ "$encryption" == "psk" -o "$encryption" == "psk2" ] && {
if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" $freq $htmode || {
echo "enable_mac80211($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
}
mac80211_start_vif "$vif" "$ifname"
continue
fi
}
[ "$encryption" == "wep" ] && {
case "$key" in
[1234])
local idx
for idx in 1 2 3 4; do
local ikey
config_get ikey "$vif" "key$idx"
[ -n "$ikey" ] && {
ikey="$(($idx - 1)):$(prepare_key_wep "$ikey")"
[ $idx -eq $key ] && ikey="d:$ikey"
append keyspec "$ikey"
}
done
;;
*) append keyspec "d:0:$(prepare_key_wep "$key")" ;;
esac
}
local br brval brsub brstr
[ -n "$basic_rate_list" ] && {
for br in $basic_rate_list; do
brval="$(($br / 1000))"
brsub="$((($br / 100) % 10))"
[ "$brsub" -gt 0 ] && brval="$brval.$brsub"
[ -n "$brstr" ] && brstr="$brstr,"
brstr="$brstr$brval"
done
}
local mcval=""
[ -n "$mcast_rate" ] && {
mcval="$(($mcast_rate / 1000))"
mcsub="$(( ($mcast_rate / 100) % 10 ))"
[ "$mcsub" -gt 0 ] && mcval="$mcval.$mcsub"
}
iw dev "$ifname" ibss join "$ssid" $freq $htmode \
${fixed:+fixed-freq} $bssid \
${beacon_int:+beacon-interval $beacon_int} \
${brstr:+basic-rates $brstr} \
${mcval:+mcast-rate $mcval} \
${keyspec:+keys $keyspec}
;;
sta)
if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" || {
echo "enable_mac80211($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
[ "$mode" = "ap" ] || mac80211_start_vif "$vif" "$ifname"
done
}
check_mac80211_device() {
config_get phy "$1" phy
[ -z "$phy" ] && {
find_mac80211_phy "$1" >/dev/null || return 0
config_get phy "$1" phy
}
[ "$phy" = "$dev" ] && found=1
}
detect_mac80211() {
devidx=0
config_load wireless
while :; do
config_get type "radio$devidx" type
[ -n "$type" ] || break
devidx=$(($devidx + 1))
done
for dev in $(ls /sys/class/ieee80211); do
found=0
config_foreach check_mac80211_device wifi-device
[ "$found" -gt 0 ] && continue
mode_11n=""
mode_band="g"
channel="11"
ht_cap=0
for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
ht_cap="$(($ht_cap | $cap))"
done
ht_capab="";
[ "$ht_cap" -gt 0 ] && {
mode_11n="n"
append ht_capab " option htmode HT20" "$N"
list=" list ht_capab"
[ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list LDPC" "$N"
[ "$(($ht_cap & 16))" -eq 16 ] && append ht_capab "$list GF" "$N"
[ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list SHORT-GI-20" "$N"
[ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list SHORT-GI-40" "$N"
[ "$(($ht_cap & 128))" -eq 128 ] && append ht_capab "$list TX-STBC" "$N"
[ "$(($ht_cap & 768))" -eq 256 ] && append ht_capab "$list RX-STBC1" "$N"
[ "$(($ht_cap & 768))" -eq 512 ] && append ht_capab "$list RX-STBC12" "$N"
[ "$(($ht_cap & 768))" -eq 768 ] && append ht_capab "$list RX-STBC123" "$N"
[ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list DSSS_CCK-40" "$N"
}
iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
if [ -x /usr/bin/readlink ]; then
path="$(readlink -f /sys/class/ieee80211/${dev}/device)"
path="${path##/sys/devices/}"
dev_id=" option path '$path'"
else
dev_id=" option macaddr $(cat /sys/class/ieee80211/${dev}/macaddress)"
fi
cat <<EOF
config wifi-device radio$devidx
option type mac80211
option channel ${channel}
option hwmode 11${mode_11n}${mode_band}
$dev_id
$ht_capab
# REMOVE THIS LINE TO ENABLE WIFI:
option disabled 1
config wifi-iface
option device radio$devidx
option network lan
option mode ap
option ssid OpenWrt
option encryption none
EOF
devidx=$(($devidx + 1))
done
}