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