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
  70 enable_mac80211() {
  71         local device="$1"
  72         config_get channel "$device" channel
  73         config_get vifs "$device" vifs
  74         config_get txpower "$device" txpower
  75         find_mac80211_phy "$device" || return 0
  76         config_get phy "$device" phy
  77         local i=0
  78
  79         wifi_fixup_hwmode "$device" "g"
  80         for vif in $vifs; do
  81                 while [ -d "/sys/class/net/wlan$i" ]; do
  82                         i=$(($i + 1))
  83                 done
  84
  85                 config_get ifname "$vif" ifname
  86                 [ -n "$ifname" ] || {
  87                         ifname="wlan$i"
  88                 }
  89                 config_set "$vif" ifname "$ifname"
  90
  91                 config_get enc "$vif" encryption
  92                 config_get mode "$vif" mode
  93                 config_get ssid "$vif" ssid
  94
  95                 # It is far easier to delete and create the desired interface
  96                 case "$mode" in
  97                         adhoc)
  98                                 iw phy "$phy" interface add "$ifname" type adhoc
  99                         ;;
 100                         ap)
 101                                 # Hostapd will handle recreating the interface and
 102                                 # it's accompanying monitor
 103                                 iw phy "$phy" interface add "$ifname" type managed
 104                         ;;
 105                         mesh)
 106                                 config_get mesh_id "$vif" mesh_id
 107                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 108                         ;;
 109                         monitor)
 110                                 iw phy "$phy" interface add "$ifname" type monitor
 111                         ;;
 112                         sta)
 113                                 iw phy "$phy" interface add "$ifname" type managed
 114                         ;;
 115                 esac
 116
 117                 # All interfaces must have unique mac addresses
 118                 # which can either be explicitly set in the device
 119                 # section, or automatically generated
 120                 config_get macaddr "$device" macaddr
 121                 local mac_1="${macaddr%%:*}"
 122                 local mac_2="${macaddr#*:}"
 123
 124                 config_get vif_mac "$vif" macaddr
 125                 [ -n "$vif_mac" ] || {
 126                         if [ "$i" -gt 0 ]; then
 127                                 offset="$(( 2 + $i * 4 ))"
 128                         else
 129                                 offset="0"
 130                         fi
 131                         vif_mac="$( printf %02x $(($mac_1 + $offset)) ):$mac_2"
 132                 }
 133                 ifconfig "$ifname" hw ether "$vif_mac"
 134
 135                 # We attempt to set teh channel for all interfaces, although
 136                 # mac80211 may not support it or the driver might not yet
 137                 iw dev "$ifname" set channel "$channel"
 138
 139                 local key keystring
 140
 141                 # Valid values are:
 142                 # wpa / wep / none
 143                 #
 144                 # !! ap !!
 145                 #
 146                 # ALL ap functionality will be passed to hostapd
 147                 #
 148                 # !! mesh / adhoc / station !!
 149                 # none -> NO encryption
 150                 #
 151                 # wep + keymgmt = '' -> we use iw to connect to the
 152                 # network.
 153                 #
 154                 # wep + keymgmt = 'NONE' -> wpa_supplicant will be
 155                 # configured to handle the wep connection
 156                 if [ ! "$mode" = "ap" ]; then
 157                         case "$enc" in
 158                                 wep)
 159                                         config_get keymgmt "$vif" keymgmt
 160                                         if [ -e "$keymgmt" ]; then
 161                                                 for idx in 1 2 3 4; do
 162                                                         local zidx
 163                                                         zidx = idx - 1
 164                                                         config_get key "$vif" "key${idx}"
 165                                                         if [ -n "$key" ]; then
 166                                                                 append keystring "${zidx}:${key} "
 167                                                         fi
 168                                                 done
 169                                         fi
 170                                 ;;
 171                                 wpa)
 172                                         config_get key "$vif" key
 173                                 ;;
 174                         esac
 175                 fi
 176
 177                 # txpower is not yet implemented in iw
 178                 config_get vif_txpower "$vif" txpower
 179                 # use vif_txpower (from wifi-iface) to override txpower (from
 180                 # wifi-device) if the latter doesn't exist
 181                 txpower="${txpower:-$vif_txpower}"
 182                 [ -z "$txpower" ] || iwconfig "$ifname" txpower "${txpower%%.*}"
 183
 184                 config_get frag "$vif" frag
 185                 if [ -n "$frag" ]; then
 186                         iw phy "$phy" set frag "${frag%%.*}"
 187                 fi
 188
 189                 config_get rts "$vif" rts
 190                 if [ -n "$rts" ]; then
 191                         iw phy "$phy" set rts "${frag%%.*}"
 192                 fi
 193
 194                 ifconfig "$ifname" up
 195
 196                 local net_cfg bridge
 197                 net_cfg="$(find_net_config "$vif")"
 198                 [ -z "$net_cfg" ] || {
 199                         bridge="$(bridge_interface "$net_cfg")"
 200                         config_set "$vif" bridge "$bridge"
 201                         start_net "$ifname" "$net_cfg"
 202                 }
 203
 204                 set_wifi_up "$vif" "$ifname"
 205                 case "$mode" in
 206                         ap)
 207                                 if eval "type hostapd_setup_vif" 2>/dev/null >/dev/null; then
 208                                         hostapd_setup_vif "$vif" nl80211 || {
 209                                                 echo "enable_mac80211($device): Failed to set up wpa for interface $ifname" >&2
 210                                                 # make sure this wifi interface won't accidentally stay open without encryption
 211                                                 ifconfig "$ifname" down
 212                                                 continue
 213                                         }
 214                                 fi
 215                         ;;
 216                         sta|mesh|adhoc)
 217                                 # Fixup... sometimes you have to scan to get beaconing going
 218                                 iw dev "$ifname" scan &> /dev/null
 219                                 case "$enc" in
 220                                         wep)
 221                                                 if [ -e "$keymgmt" ]; then
 222                                                         [ -n "$keystring" ] &&
 223                                                                 iw dev "$ifname" connect "$ssid" key "$keystring"
 224                                                 else
 225                                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 226                                                                 wpa_supplicant_setup_vif "$vif" wext || {
 227                                                                         echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 228                                                                         # make sure this wifi interface won't accidentally stay open without encryption
 229                                                                         ifconfig "$ifname" down
 230                                                                         continue
 231                                                                 }
 232                                                         fi
 233                                                 fi
 234                                         ;;
 235                                         wpa)
 236                                                 if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 237                                                         wpa_supplicant_setup_vif "$vif" wext || {
 238                                                                 echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 239                                                                 # make sure this wifi interface won't accidentally stay open without encryption
 240                                                                 ifconfig "$ifname" down
 241                                                                 continue
 242                                                         }
 243                                                 fi
 244                                         ;;
 245                                 esac
 246
 247                         ;;
 248                 esac
 249         done
 250 }
 251
 252
 253 check_device() {
 254         config_get phy "$1" phy
 255         [ -z "$phy" ] && {
 256                 find_mac80211_phy "$1" || return 0
 257                 config_get phy "$1" phy
 258         }
 259         [ "$phy" = "$dev" ] && found=1
 260 }
 261
 262 detect_mac80211() {
 263         devidx=0
 264         config_load wireless
 265         for dev in $(ls /sys/class/ieee80211); do
 266                 found=0
 267                 config_foreach check_device wifi-device
 268                 [ "$found" -gt 0 ] && continue
 269
 270                 while :; do
 271                         config_get type "wifi$devidx" type
 272                         [ -n "$type" ] || break
 273                         devidx=$(($devidx + 1))
 274                 done
 275                 mode_11n=""
 276                 mode_band="g"
 277                 iw phy "$dev" info | grep -q 'HT cap' && mode_11n="n"
 278                 iw phy "$dev" info | grep -q '2412 MHz' || mode_band="a"
 279
 280                 cat <<EOF
 281 config wifi-device  wifi$devidx
 282         option type     mac80211
 283         option channel  5
 284         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 285         option hwmode   11${mode_11n}${mode_band}
 286         # REMOVE THIS LINE TO ENABLE WIFI:
 287         option disabled 1
 288
 289 config wifi-iface
 290         option device   wifi$devidx
 291         option network  lan
 292         option mode     ap
 293         option ssid     OpenWrt
 294         option encryption none
 295
 296 EOF
 297         done
 298 }
 299