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 channel="$2"
  72         iw "$phy" info | grep -E -m1 "(\* ${channel:-....} MHz${channel:+|\\[$channel\\]})" | 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
  83         # convert channel to frequency
  84         local freq="$(get_freq "$phy" "$channel")"
  85
  86         wifi_fixup_hwmode "$device" "g"
  87         for vif in $vifs; do
  88                 while [ -d "/sys/class/net/wlan$i" ]; do
  89                         i=$(($i + 1))
  90                 done
  91
  92                 config_get ifname "$vif" ifname
  93                 [ -n "$ifname" ] || {
  94                         ifname="wlan$i"
  95                 }
  96                 config_set "$vif" ifname "$ifname"
  97
  98                 config_get enc "$vif" encryption
  99                 config_get mode "$vif" mode
 100                 config_get ssid "$vif" ssid
 101
 102                 # It is far easier to delete and create the desired interface
 103                 case "$mode" in
 104                         adhoc)
 105                                 iw phy "$phy" interface add "$ifname" type adhoc
 106                         ;;
 107                         ap)
 108                                 # Hostapd will handle recreating the interface and
 109                                 # it's accompanying monitor
 110                                 iw phy "$phy" interface add "$ifname" type managed
 111                         ;;
 112                         mesh)
 113                                 config_get mesh_id "$vif" mesh_id
 114                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 115                         ;;
 116                         monitor)
 117                                 iw phy "$phy" interface add "$ifname" type monitor
 118                         ;;
 119                         sta)
 120                                 iw phy "$phy" interface add "$ifname" type managed
 121                         ;;
 122                 esac
 123
 124                 # All interfaces must have unique mac addresses
 125                 # which can either be explicitly set in the device
 126                 # section, or automatically generated
 127                 config_get macaddr "$device" macaddr
 128                 local mac_1="${macaddr%%:*}"
 129                 local mac_2="${macaddr#*:}"
 130
 131                 config_get vif_mac "$vif" macaddr
 132                 [ -n "$vif_mac" ] || {
 133                         if [ "$i" -gt 0 ]; then
 134                                 offset="$(( 2 + $i * 4 ))"
 135                         else
 136                                 offset="0"
 137                         fi
 138                         vif_mac="$( printf %02x $(($mac_1 + $offset)) ):$mac_2"
 139                 }
 140                 ifconfig "$ifname" hw ether "$vif_mac"
 141
 142                 # We attempt to set teh channel for all interfaces, although
 143                 # mac80211 may not support it or the driver might not yet
 144                 [ -z "$channel" ] || iw dev "$ifname" set channel "$channel"
 145
 146                 local key keystring
 147
 148                 # Valid values are:
 149                 # wpa / wep / none
 150                 #
 151                 # !! ap !!
 152                 #
 153                 # ALL ap functionality will be passed to hostapd
 154                 #
 155                 # !! mesh / adhoc / station !!
 156                 # none -> NO encryption
 157                 #
 158                 # wep + keymgmt = '' -> we use iw to connect to the
 159                 # network.
 160                 #
 161                 # wep + keymgmt = 'NONE' -> wpa_supplicant will be
 162                 # configured to handle the wep connection
 163                 if [ ! "$mode" = "ap" ]; then
 164                         case "$enc" in
 165                                 wep)
 166                                         config_get keymgmt "$vif" keymgmt
 167                                         if [ -e "$keymgmt" ]; then
 168                                                 for idx in 1 2 3 4; do
 169                                                         local zidx
 170                                                         zidx = idx - 1
 171                                                         config_get key "$vif" "key${idx}"
 172                                                         if [ -n "$key" ]; then
 173                                                                 append keystring "${zidx}:${key} "
 174                                                         fi
 175                                                 done
 176                                         fi
 177                                 ;;
 178                                 wpa)
 179                                         config_get key "$vif" key
 180                                 ;;
 181                         esac
 182                 fi
 183
 184                 # txpower is not yet implemented in iw
 185                 config_get vif_txpower "$vif" txpower
 186                 # use vif_txpower (from wifi-iface) to override txpower (from
 187                 # wifi-device) if the latter doesn't exist
 188                 txpower="${txpower:-$vif_txpower}"
 189                 [ -z "$txpower" ] || iwconfig "$ifname" txpower "${txpower%%.*}"
 190
 191                 config_get frag "$vif" frag
 192                 if [ -n "$frag" ]; then
 193                         iw phy "$phy" set frag "${frag%%.*}"
 194                 fi
 195
 196                 config_get rts "$vif" rts
 197                 if [ -n "$rts" ]; then
 198                         iw phy "$phy" set rts "${frag%%.*}"
 199                 fi
 200
 201                 ifconfig "$ifname" up
 202
 203                 local net_cfg bridge
 204                 net_cfg="$(find_net_config "$vif")"
 205                 [ -z "$net_cfg" ] || {
 206                         bridge="$(bridge_interface "$net_cfg")"
 207                         config_set "$vif" bridge "$bridge"
 208                         start_net "$ifname" "$net_cfg"
 209                 }
 210
 211                 set_wifi_up "$vif" "$ifname"
 212                 case "$mode" in
 213                         ap)
 214                                 if eval "type hostapd_setup_vif" 2>/dev/null >/dev/null; then
 215                                         hostapd_setup_vif "$vif" nl80211 || {
 216                                                 echo "enable_mac80211($device): Failed to set up wpa for interface $ifname" >&2
 217                                                 # make sure this wifi interface won't accidentally stay open without encryption
 218                                                 ifconfig "$ifname" down
 219                                                 continue
 220                                         }
 221                                 fi
 222                         ;;
 223                         adhoc)
 224                                 config_get bssid "$vif" bssid
 225                                 iw dev "$ifname" ibss join "$ssid" ${freq:+$freq fixed-freq} $bssid
 226                         ;;
 227                         sta|mesh)
 228                                 # Fixup... sometimes you have to scan to get beaconing going
 229                                 iw dev "$ifname" scan &> /dev/null
 230                                 case "$enc" in
 231                                         wep)
 232                                                 if [ -e "$keymgmt" ]; then
 233                                                         [ -n "$keystring" ] &&
 234                                                                 iw dev "$ifname" connect "$ssid" key "$keystring"
 235                                                 else
 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                                                 fi
 245                                         ;;
 246                                         wpa)
 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                                         ;;
 256                                 esac
 257
 258                         ;;
 259                 esac
 260         done
 261 }
 262
 263
 264 check_device() {
 265         config_get phy "$1" phy
 266         [ -z "$phy" ] && {
 267                 find_mac80211_phy "$1" || return 0
 268                 config_get phy "$1" phy
 269         }
 270         [ "$phy" = "$dev" ] && found=1
 271 }
 272
 273 detect_mac80211() {
 274         devidx=0
 275         config_load wireless
 276         for dev in $(ls /sys/class/ieee80211); do
 277                 found=0
 278                 config_foreach check_device wifi-device
 279                 [ "$found" -gt 0 ] && continue
 280
 281                 while :; do
 282                         config_get type "wifi$devidx" type
 283                         [ -n "$type" ] || break
 284                         devidx=$(($devidx + 1))
 285                 done
 286                 mode_11n=""
 287                 mode_band="g"
 288                 iw phy "$dev" info | grep -q 'HT cap' && mode_11n="n"
 289                 iw phy "$dev" info | grep -q '2412 MHz' || mode_band="a"
 290
 291                 cat <<EOF
 292 config wifi-device  wifi$devidx
 293         option type     mac80211
 294         option channel  5
 295         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 296         option hwmode   11${mode_11n}${mode_band}
 297         # REMOVE THIS LINE TO ENABLE WIFI:
 298         option disabled 1
 299
 300 config wifi-iface
 301         option device   wifi$devidx
 302         option network  lan
 303         option mode     ap
 304         option ssid     OpenWrt
 305         option encryption none
 306
 307 EOF
 308         done
 309 }
 310