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

   1 #!/bin/sh
   2 append DRIVERS "mac80211"
   3
   4 find_mac80211_phy() {
   5         config_get device "$1"
   6
   7         local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
   8         config_get phy "$device" phy
   9         [ -z "$phy" -a -n "$macaddr" ] && {
  10                 for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
  11                         [ "$macaddr" = "$(cat /sys/class/ieee80211/${phy}/macaddress)" ] || continue
  12                         config_set "$device" phy "$phy"
  13                         break
  14                 done
  15                 config_get phy "$device" phy
  16         }
  17         [ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
  18                 echo "PHY for wifi device $1 not found"
  19                 return 1
  20         }
  21         [ -z "$macaddr" ] && {
  22                 config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
  23         }
  24         return 0
  25 }
  26
  27 scan_mac80211() {
  28         local device="$1"
  29         local adhoc sta ap monitor mesh
  30
  31         config_get vifs "$device" vifs
  32         for vif in $vifs; do
  33                 config_get mode "$vif" mode
  34                 case "$mode" in
  35                         adhoc|sta|ap|monitor|mesh)
  36                                 append $mode "$vif"
  37                         ;;
  38                         *) echo "$device($vif): Invalid mode, ignored."; continue;;
  39                 esac
  40         done
  41
  42         config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
  43 }
  44
  45
  46 disable_mac80211() (
  47         local device="$1"
  48
  49         find_mac80211_phy "$device" || return 0
  50         config_get phy "$device" phy
  51
  52         set_wifi_down "$device"
  53         # kill all running hostapd and wpa_supplicant processes that
  54         # are running on atheros/mac80211 vifs
  55         for pid in `pidof hostapd wpa_supplicant`; do
  56                 grep wlan /proc/$pid/cmdline >/dev/null && \
  57                         kill $pid
  58         done
  59
  60         include /lib/network
  61         for wdev in $(ls /sys/class/ieee80211/${phy}/device/net 2>/dev/null); do
  62                 ifconfig "$wdev" down 2>/dev/null
  63                 unbridge "$dev"
  64                 iw dev "$wdev" del
  65         done
  66
  67         return 0
  68 )
  69 get_freq() {
  70         local phy="$1"
  71         local chan="$2"
  72         iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
  73 }
  74 enable_mac80211() {
  75         local device="$1"
  76         config_get channel "$device" channel
  77         config_get vifs "$device" vifs
  78         config_get txpower "$device" txpower
  79         config_get country "$device" country
  80         config_get distance "$device" distance
  81         find_mac80211_phy "$device" || return 0
  82         config_get phy "$device" phy
  83         local i=0
  84         fixed=""
  85
  86         [ -n "$country" ] && iw reg set "$country"
  87         [ "$channel" = "auto" -o "$channel" = "0" ] || {
  88                 fixed=1
  89         }
  90
  91         [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
  92
  93         export channel fixed
  94         # convert channel to frequency
  95         local freq="$(get_freq "$phy" "${fixed:+$channel}")"
  96
  97         wifi_fixup_hwmode "$device" "g"
  98         for vif in $vifs; do
  99                 while [ -d "/sys/class/net/wlan$i" ]; do
 100                         i=$(($i + 1))
 101                 done
 102
 103                 config_get ifname "$vif" ifname
 104                 [ -n "$ifname" ] || {
 105                         ifname="wlan$i"
 106                 }
 107                 config_set "$vif" ifname "$ifname"
 108
 109                 config_get enc "$vif" encryption
 110                 config_get mode "$vif" mode
 111                 config_get ssid "$vif" ssid
 112                 config_get_bool wds "$vif" wds 0
 113
 114                 # It is far easier to delete and create the desired interface
 115                 case "$mode" in
 116                         adhoc)
 117                                 iw phy "$phy" interface add "$ifname" type adhoc
 118                         ;;
 119                         ap)
 120                                 # Hostapd will handle recreating the interface and
 121                                 # it's accompanying monitor
 122                                 iw phy "$phy" interface add "$ifname" type managed
 123                         ;;
 124                         mesh)
 125                                 config_get mesh_id "$vif" mesh_id
 126                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 127                         ;;
 128                         monitor)
 129                                 iw phy "$phy" interface add "$ifname" type monitor
 130                         ;;
 131                         sta)
 132                                 local wdsflag
 133                                 [ "$wds" -gt 0 ] && wdsflag="4addr on"
 134                                 iw phy "$phy" interface add "$ifname" type managed $wdsflag
 135                                 config_get_bool powersave "$vif" powersave 0
 136                                 [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
 137                                 iwconfig "$ifname" power "$powersave"
 138                         ;;
 139                 esac
 140
 141                 # All interfaces must have unique mac addresses
 142                 # which can either be explicitly set in the device
 143                 # section, or automatically generated
 144                 config_get macaddr "$device" macaddr
 145                 local mac_1="${macaddr%%:*}"
 146                 local mac_2="${macaddr#*:}"
 147
 148                 config_get vif_mac "$vif" macaddr
 149                 [ -n "$vif_mac" ] || {
 150                         if [ "$i" -gt 0 ]; then
 151                                 offset="$(( 2 + $i * 4 ))"
 152                         else
 153                                 offset="0"
 154                         fi
 155                         vif_mac="$( printf %02x $((0x$mac_1 + $offset)) ):$mac_2"
 156                 }
 157                 ifconfig "$ifname" hw ether "$vif_mac"
 158
 159                 # We attempt to set teh channel for all interfaces, although
 160                 # mac80211 may not support it or the driver might not yet
 161                 [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
 162
 163                 local key keystring
 164
 165                 # Valid values are:
 166                 # wpa / wep / none
 167                 #
 168                 # !! ap !!
 169                 #
 170                 # ALL ap functionality will be passed to hostapd
 171                 #
 172                 # !! mesh / adhoc / station !!
 173                 # none -> NO encryption
 174                 #
 175                 # wep + keymgmt = '' -> we use iw to connect to the
 176                 # network.
 177                 #
 178                 # wep + keymgmt = 'NONE' -> wpa_supplicant will be
 179                 # configured to handle the wep connection
 180                 if [ ! "$mode" = "ap" ]; then
 181                         case "$enc" in
 182                                 *wep*)
 183                                         config_get keymgmt "$vif" keymgmt
 184                                         if [ -z "$keymgmt" ]; then
 185                                                 config_get key "$vif" key
 186                                                 key="${key:-1}"
 187                                                 case "$key" in
 188                                                         [1234])
 189                                                                 for idx in 1 2 3 4; do
 190                                                                         local zidx
 191                                                                         zidx=$(($idx - 1))
 192                                                                         config_get ckey "$vif" "key${idx}"
 193                                                                         if [ -n "$ckey" ]; then
 194                                                                                 [ $idx -eq $key ] && zidx="d:${zidx}"
 195                                                                                 append keystring "${zidx}:$(prepare_key_wep "$ckey")"
 196                                                                         fi
 197                                                                 done
 198                                                                 ;;
 199                                                         *)
 200                                                                 keystring="d:0:$(prepare_key_wep "$key")"
 201                                                                 ;;
 202                                                 esac
 203                                         fi
 204                                 ;;
 205                                 *psk*|*wpa*)
 206                                         config_get key "$vif" key
 207                                 ;;
 208                         esac
 209                 fi
 210
 211                 # txpower is not yet implemented in iw
 212                 config_get vif_txpower "$vif" txpower
 213                 # use vif_txpower (from wifi-iface) to override txpower (from
 214                 # wifi-device) if the latter doesn't exist
 215                 txpower="${txpower:-$vif_txpower}"
 216                 [ -z "$txpower" ] || iwconfig "$ifname" txpower "${txpower%%.*}"
 217
 218                 config_get frag "$vif" frag
 219                 if [ -n "$frag" ]; then
 220                         iw phy "$phy" set frag "${frag%%.*}"
 221                 fi
 222
 223                 config_get rts "$vif" rts
 224                 if [ -n "$rts" ]; then
 225                         iw phy "$phy" set rts "${rts%%.*}"
 226                 fi
 227
 228                 ifconfig "$ifname" up
 229
 230                 local net_cfg bridge
 231                 net_cfg="$(find_net_config "$vif")"
 232                 [ -z "$net_cfg" ] || {
 233                         bridge="$(bridge_interface "$net_cfg")"
 234                         config_set "$vif" bridge "$bridge"
 235                         start_net "$ifname" "$net_cfg"
 236                 }
 237
 238                 set_wifi_up "$vif" "$ifname"
 239                 case "$mode" in
 240                         ap)
 241                                 if eval "type hostapd_setup_vif" 2>/dev/null >/dev/null; then
 242                                         hostapd_setup_vif "$vif" nl80211 || {
 243                                                 echo "enable_mac80211($device): Failed to set up wpa for interface $ifname" >&2
 244                                                 # make sure this wifi interface won't accidentally stay open without encryption
 245                                                 ifconfig "$ifname" down
 246                                                 continue
 247                                         }
 248                                 fi
 249                         ;;
 250                         adhoc)
 251                                 config_get bssid "$vif" bssid
 252                                 iw dev "$ifname" ibss join "$ssid" $freq ${fixed:+fixed-freq} $bssid
 253                         ;;
 254                         sta|mesh)
 255                                 config_get bssid "$vif" bssid
 256                                 case "$enc" in
 257                                         *wep*)
 258                                                 if [ -z "$keymgmt" ]; then
 259                                                         [ -n "$keystring" ] &&
 260                                                                 iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid key $keystring
 261                                                 else
 262                                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 263                                                                 wpa_supplicant_setup_vif "$vif" wext || {
 264                                                                         echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 265                                                                         # make sure this wifi interface won't accidentally stay open without encryption
 266                                                                         ifconfig "$ifname" down
 267                                                                         continue
 268                                                                 }
 269                                                         fi
 270                                                 fi
 271                                         ;;
 272                                         *wpa*|*psk*)
 273                                                 config_get key "$vif" key
 274                                                 if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 275                                                         wpa_supplicant_setup_vif "$vif" wext || {
 276                                                                 echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 277                                                                 # make sure this wifi interface won't accidentally stay open without encryption
 278                                                                 ifconfig "$ifname" down
 279                                                                 continue
 280                                                         }
 281                                                 fi
 282                                         ;;
 283                                         *)
 284                                                 iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid
 285                                         ;;
 286                                 esac
 287
 288                         ;;
 289                 esac
 290         done
 291 }
 292
 293
 294 check_device() {
 295         config_get phy "$1" phy
 296         [ -z "$phy" ] && {
 297                 find_mac80211_phy "$1" >/dev/null || return 0
 298                 config_get phy "$1" phy
 299         }
 300         [ "$phy" = "$dev" ] && found=1
 301 }
 302
 303 detect_mac80211() {
 304         devidx=0
 305         config_load wireless
 306         while :; do
 307                 config_get type "radio$devidx" type
 308                 [ -n "$type" ] || break
 309                 devidx=$(($devidx + 1))
 310         done
 311         for dev in $(ls /sys/class/ieee80211); do
 312                 found=0
 313                 config_foreach check_device wifi-device
 314                 [ "$found" -gt 0 ] && continue
 315
 316                 mode_11n=""
 317                 mode_band="g"
 318                 channel="5"
 319                 ht_cap=0
 320                 for cap in $(iw phy "$dev" info | grep 'HT capabilities' | cut -d: -f2); do
 321                         ht_cap="$(($ht_cap | $cap))"
 322                 done
 323                 ht_capab="";
 324                 [ "$ht_cap" -gt 0 ] && {
 325                         mode_11n="n"
 326                         list="  list ht_capab"
 327                         [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list  LDPC" "$N"
 328                         [ "$(($ht_cap & 2))" -eq 2 ] && append ht_capab "$list  HT40-" "$N"
 329                         [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list        SHORT-GI-20" "$N"
 330                         [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list        SHORT-GI-40" "$N"
 331                         [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list    DSSS_CCK-40" "$N"
 332                 }
 333                 iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
 334
 335                 cat <<EOF
 336 config wifi-device  radio$devidx
 337         option type     mac80211
 338         option channel  ${channel}
 339         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 340         option hwmode   11${mode_11n}${mode_band}
 341         # REMOVE THIS LINE TO ENABLE WIFI:
 342         option disabled 1
 343 $ht_capab
 344
 345 config wifi-iface
 346         option device   radio$devidx
 347         option network  lan
 348         option mode     ap
 349         option ssid     OpenWrt
 350         option encryption none
 351
 352 EOF
 353         devidx=$(($devidx + 1))
 354         done
 355 }
 356