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