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         local macidx=0
  85         fixed=""
  86
  87         [ -n "$country" ] && iw reg set "$country"
  88         [ "$channel" = "auto" -o "$channel" = "0" ] || {
  89                 fixed=1
  90         }
  91
  92         [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
  93
  94         export channel fixed
  95         # convert channel to frequency
  96         local freq="$(get_freq "$phy" "${fixed:+$channel}")"
  97
  98         wifi_fixup_hwmode "$device" "g"
  99         for vif in $vifs; do
 100                 while [ -d "/sys/class/net/wlan$i" ]; do
 101                         i=$(($i + 1))
 102                 done
 103
 104                 config_get ifname "$vif" ifname
 105                 [ -n "$ifname" ] || {
 106                         ifname="wlan$i"
 107                 }
 108                 config_set "$vif" ifname "$ifname"
 109
 110                 config_get enc "$vif" encryption
 111                 config_get mode "$vif" mode
 112                 config_get ssid "$vif" ssid
 113                 config_get_bool wds "$vif" wds 0
 114
 115                 # It is far easier to delete and create the desired interface
 116                 case "$mode" in
 117                         adhoc)
 118                                 iw phy "$phy" interface add "$ifname" type adhoc
 119                         ;;
 120                         ap)
 121                                 # Hostapd will handle recreating the interface and
 122                                 # it's accompanying monitor
 123                                 iw phy "$phy" interface add "$ifname" type managed
 124                         ;;
 125                         mesh)
 126                                 config_get mesh_id "$vif" mesh_id
 127                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 128                         ;;
 129                         monitor)
 130                                 iw phy "$phy" interface add "$ifname" type monitor
 131                         ;;
 132                         sta)
 133                                 local wdsflag
 134                                 [ "$wds" -gt 0 ] && wdsflag="4addr on"
 135                                 iw phy "$phy" interface add "$ifname" type managed $wdsflag
 136                                 config_get_bool powersave "$vif" powersave 0
 137                                 [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
 138                                 iwconfig "$ifname" power "$powersave"
 139                         ;;
 140                 esac
 141
 142                 # All interfaces must have unique mac addresses
 143                 # which can either be explicitly set in the device
 144                 # section, or automatically generated
 145                 config_get macaddr "$device" macaddr
 146                 local mac_1="${macaddr%%:*}"
 147                 local mac_2="${macaddr#*:}"
 148
 149                 config_get vif_mac "$vif" macaddr
 150                 [ -n "$vif_mac" ] || {
 151                         if [ "$macidx" -gt 0 ]; then
 152                                 offset="$(( 2 + $macidx * 4 ))"
 153                         else
 154                                 offset="0"
 155                         fi
 156                         vif_mac="$( printf %02x $((0x$mac_1 + $offset)) ):$mac_2"
 157                         macidx="$(($macidx + 1))"
 158                 }
 159                 ifconfig "$ifname" hw ether "$vif_mac"
 160
 161                 # We attempt to set teh channel for all interfaces, although
 162                 # mac80211 may not support it or the driver might not yet
 163                 [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
 164
 165                 local key keystring
 166
 167                 # Valid values are:
 168                 # wpa / wep / none
 169                 #
 170                 # !! ap !!
 171                 #
 172                 # ALL ap functionality will be passed to hostapd
 173                 #
 174                 # !! mesh / adhoc / station !!
 175                 # none -> NO encryption
 176                 #
 177                 # wep + keymgmt = '' -> we use iw to connect to the
 178                 # network.
 179                 #
 180                 # wep + keymgmt = 'NONE' -> wpa_supplicant will be
 181                 # configured to handle the wep connection
 182                 if [ ! "$mode" = "ap" ]; then
 183                         case "$enc" in
 184                                 *wep*)
 185                                         config_get keymgmt "$vif" keymgmt
 186                                         if [ -z "$keymgmt" ]; then
 187                                                 config_get key "$vif" key
 188                                                 key="${key:-1}"
 189                                                 case "$key" in
 190                                                         [1234])
 191                                                                 for idx in 1 2 3 4; do
 192                                                                         local zidx
 193                                                                         zidx=$(($idx - 1))
 194                                                                         config_get ckey "$vif" "key${idx}"
 195                                                                         if [ -n "$ckey" ]; then
 196                                                                                 [ $idx -eq $key ] && zidx="d:${zidx}"
 197                                                                                 append keystring "${zidx}:$(prepare_key_wep "$ckey")"
 198                                                                         fi
 199                                                                 done
 200                                                                 ;;
 201                                                         *)
 202                                                                 keystring="d:0:$(prepare_key_wep "$key")"
 203                                                                 ;;
 204                                                 esac
 205                                         fi
 206                                 ;;
 207                                 *psk*|*wpa*)
 208                                         config_get key "$vif" key
 209                                 ;;
 210                         esac
 211                 fi
 212
 213                 # txpower is not yet implemented in iw
 214                 config_get vif_txpower "$vif" txpower
 215                 # use vif_txpower (from wifi-iface) to override txpower (from
 216                 # wifi-device) if the latter doesn't exist
 217                 txpower="${txpower:-$vif_txpower}"
 218                 [ -z "$txpower" ] || iwconfig "$ifname" txpower "${txpower%%.*}"
 219
 220                 config_get frag "$vif" frag
 221                 if [ -n "$frag" ]; then
 222                         iw phy "$phy" set frag "${frag%%.*}"
 223                 fi
 224
 225                 config_get rts "$vif" rts
 226                 if [ -n "$rts" ]; then
 227                         iw phy "$phy" set rts "${rts%%.*}"
 228                 fi
 229
 230                 ifconfig "$ifname" up
 231
 232                 local net_cfg bridge
 233                 net_cfg="$(find_net_config "$vif")"
 234                 [ -z "$net_cfg" ] || {
 235                         bridge="$(bridge_interface "$net_cfg")"
 236                         config_set "$vif" bridge "$bridge"
 237                         start_net "$ifname" "$net_cfg"
 238                 }
 239
 240                 set_wifi_up "$vif" "$ifname"
 241                 case "$mode" in
 242                         ap)
 243                                 if eval "type hostapd_setup_vif" 2>/dev/null >/dev/null; then
 244                                         hostapd_setup_vif "$vif" nl80211 || {
 245                                                 echo "enable_mac80211($device): Failed to set up wpa for interface $ifname" >&2
 246                                                 # make sure this wifi interface won't accidentally stay open without encryption
 247                                                 ifconfig "$ifname" down
 248                                                 continue
 249                                         }
 250                                 fi
 251                         ;;
 252                         adhoc)
 253                                 config_get bssid "$vif" bssid
 254                                 iw dev "$ifname" ibss join "$ssid" $freq ${fixed:+fixed-freq} $bssid
 255                         ;;
 256                         sta|mesh)
 257                                 config_get bssid "$vif" bssid
 258                                 case "$enc" in
 259                                         *wep*)
 260                                                 if [ -z "$keymgmt" ]; then
 261                                                         [ -n "$keystring" ] &&
 262                                                                 iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid key $keystring
 263                                                 else
 264                                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 265                                                                 wpa_supplicant_setup_vif "$vif" wext || {
 266                                                                         echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 267                                                                         # make sure this wifi interface won't accidentally stay open without encryption
 268                                                                         ifconfig "$ifname" down
 269                                                                         continue
 270                                                                 }
 271                                                         fi
 272                                                 fi
 273                                         ;;
 274                                         *wpa*|*psk*)
 275                                                 config_get key "$vif" key
 276                                                 if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 277                                                         wpa_supplicant_setup_vif "$vif" wext || {
 278                                                                 echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 279                                                                 # make sure this wifi interface won't accidentally stay open without encryption
 280                                                                 ifconfig "$ifname" down
 281                                                                 continue
 282                                                         }
 283                                                 fi
 284                                         ;;
 285                                         *)
 286                                                 iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid
 287                                         ;;
 288                                 esac
 289
 290                         ;;
 291                 esac
 292         done
 293 }
 294
 295
 296 check_device() {
 297         config_get phy "$1" phy
 298         [ -z "$phy" ] && {
 299                 find_mac80211_phy "$1" >/dev/null || return 0
 300                 config_get phy "$1" phy
 301         }
 302         [ "$phy" = "$dev" ] && found=1
 303 }
 304
 305 detect_mac80211() {
 306         devidx=0
 307         config_load wireless
 308         while :; do
 309                 config_get type "radio$devidx" type
 310                 [ -n "$type" ] || break
 311                 devidx=$(($devidx + 1))
 312         done
 313         for dev in $(ls /sys/class/ieee80211); do
 314                 found=0
 315                 config_foreach check_device wifi-device
 316                 [ "$found" -gt 0 ] && continue
 317
 318                 mode_11n=""
 319                 mode_band="g"
 320                 channel="5"
 321                 ht_cap=0
 322                 for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
 323                         ht_cap="$(($ht_cap | $cap))"
 324                 done
 325                 ht_capab="";
 326                 [ "$ht_cap" -gt 0 ] && {
 327                         mode_11n="n"
 328                         list="  list ht_capab"
 329                         [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list  LDPC" "$N"
 330                         [ "$(($ht_cap & 2))" -eq 2 ] && append ht_capab "$list  HT40-" "$N"
 331                         [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list        SHORT-GI-20" "$N"
 332                         [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list        SHORT-GI-40" "$N"
 333                         [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list    DSSS_CCK-40" "$N"
 334                 }
 335                 iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
 336
 337                 cat <<EOF
 338 config wifi-device  radio$devidx
 339         option type     mac80211
 340         option channel  ${channel}
 341         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 342         option hwmode   11${mode_11n}${mode_band}
 343         # REMOVE THIS LINE TO ENABLE WIFI:
 344         option disabled 1
 345 $ht_capab
 346
 347 config wifi-iface
 348         option device   radio$devidx
 349         option network  lan
 350         option mode     ap
 351         option ssid     OpenWrt
 352         option encryption none
 353
 354 EOF
 355         devidx=$(($devidx + 1))
 356         done
 357 }
 358