package/mac80211/files/lib/wifi/mac80211.sh

   1 #!/bin/sh
   2 append DRIVERS "mac80211"
   3
   4 mac80211_hostapd_setup_base() {
   5         local phy="$1"
   6         local ifname="$2"
   7
   8         cfgfile="/var/run/hostapd-$phy.conf"
   9         config_get device "$vif" device
  10         config_get country "$device" country
  11         config_get hwmode "$device" hwmode
  12         config_get channel "$device" channel
  13         config_get_bool noscan "$device" noscan
  14         [ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
  15         [ "$channel" = auto ] && channel=
  16         [ -n "$hwmode" ] && {
  17                 config_get hwmode_11n "$device" hwmode_11n
  18                 [ -n "$hwmode_11n" ] && {
  19                         hwmode="$hwmode_11n"
  20                         append base_cfg "ieee80211n=1" "$N"
  21                         config_get htmode "$device" htmode
  22                         config_get ht_capab_list "$device" ht_capab
  23                         case "$htmode" in
  24                                 HT20|HT40+|HT40-) ht_capab="[$htmode]";;
  25                                 *)ht_capab=;;
  26                         esac
  27                         for cap in $ht_capab_list; do
  28                                 ht_capab="$ht_capab[$cap]"
  29                         done
  30                         [ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
  31                 }
  32         }
  33         cat > "$cfgfile" <<EOF
  34 ctrl_interface=/var/run/hostapd-$phy
  35 driver=nl80211
  36 wmm_ac_bk_cwmin=4
  37 wmm_ac_bk_cwmax=10
  38 wmm_ac_bk_aifs=7
  39 wmm_ac_bk_txop_limit=0
  40 wmm_ac_bk_acm=0
  41 wmm_ac_be_aifs=3
  42 wmm_ac_be_cwmin=4
  43 wmm_ac_be_cwmax=10
  44 wmm_ac_be_txop_limit=0
  45 wmm_ac_be_acm=0
  46 wmm_ac_vi_aifs=2
  47 wmm_ac_vi_cwmin=3
  48 wmm_ac_vi_cwmax=4
  49 wmm_ac_vi_txop_limit=94
  50 wmm_ac_vi_acm=0
  51 wmm_ac_vo_aifs=2
  52 wmm_ac_vo_cwmin=2
  53 wmm_ac_vo_cwmax=3
  54 wmm_ac_vo_txop_limit=47
  55 wmm_ac_vo_acm=0
  56 tx_queue_data3_aifs=7
  57 tx_queue_data3_cwmin=15
  58 tx_queue_data3_cwmax=1023
  59 tx_queue_data3_burst=0
  60 tx_queue_data2_aifs=3
  61 tx_queue_data2_cwmin=15
  62 tx_queue_data2_cwmax=63
  63 tx_queue_data2_burst=0
  64 tx_queue_data1_aifs=1
  65 tx_queue_data1_cwmin=7
  66 tx_queue_data1_cwmax=15
  67 tx_queue_data1_burst=3.0
  68 tx_queue_data0_aifs=1
  69 tx_queue_data0_cwmin=3
  70 tx_queue_data0_cwmax=7
  71 tx_queue_data0_burst=1.5
  72 ${hwmode:+hw_mode=$hwmode}
  73 ${channel:+channel=$channel}
  74 ${country:+country_code=$country}
  75 ${noscan:+noscan=$noscan}
  76 $base_cfg
  77
  78 EOF
  79 }
  80
  81 mac80211_hostapd_setup_bss() {
  82         local phy="$1"
  83         local vif="$2"
  84
  85         hostapd_cfg=
  86         cfgfile="/var/run/hostapd-$phy.conf"
  87         config_get ifname "$vif" ifname
  88
  89         if [ -f "$cfgfile" ]; then
  90                 append hostapd_cfg "bss=$ifname" "$N"
  91         else
  92                 mac80211_hostapd_setup_base "$phy" "$ifname"
  93                 append hostapd_cfg "interface=$ifname" "$N"
  94         fi
  95
  96         local net_cfg bridge
  97         net_cfg="$(find_net_config "$vif")"
  98         [ -z "$net_cfg" ] || bridge="$(bridge_interface "$net_cfg")"
  99         config_set "$vif" bridge "$bridge"
 100
 101         hostapd_set_bss_options hostapd_cfg "$vif"
 102
 103         config_get_bool wds "$vif" wds 0
 104         [ "$wds" -gt 0 ] && append hostapd_cfg "wds_sta=1" "$N"
 105
 106         local macaddr hidden maxassoc wmm
 107         config_get macaddr "$vif" macaddr
 108         config_get maxassoc "$vif" maxassoc
 109         config_get_bool hidden "$vif" hidden 0
 110         config_get_bool wmm "$vif" wmm 1
 111         cat >> /var/run/hostapd-$phy.conf <<EOF
 112 $hostapd_cfg
 113 wmm_enabled=$wmm
 114 bssid=$macaddr
 115 ignore_broadcast_ssid=$hidden
 116 ${maxassoc:+max_num_sta=$maxassoc}
 117 EOF
 118 }
 119
 120 mac80211_start_vif() {
 121         local vif="$1"
 122         local ifname="$2"
 123
 124         local net_cfg
 125         net_cfg="$(find_net_config "$vif")"
 126         [ -z "$net_cfg" ] || start_net "$ifname" "$net_cfg"
 127
 128         set_wifi_up "$vif" "$ifname"
 129 }
 130
 131 find_mac80211_phy() {
 132         local device="$1"
 133
 134         local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
 135         config_get phy "$device" phy
 136         [ -z "$phy" -a -n "$macaddr" ] && {
 137                 for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
 138                         [ "$macaddr" = "$(cat /sys/class/ieee80211/${phy}/macaddress)" ] || continue
 139                         config_set "$device" phy "$phy"
 140                         break
 141                 done
 142                 config_get phy "$device" phy
 143         }
 144         [ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
 145                 echo "PHY for wifi device $1 not found"
 146                 return 1
 147         }
 148         [ -z "$macaddr" ] && {
 149                 config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
 150         }
 151         return 0
 152 }
 153
 154 scan_mac80211() {
 155         local device="$1"
 156         local adhoc sta ap monitor mesh
 157
 158         config_get vifs "$device" vifs
 159         for vif in $vifs; do
 160                 config_get mode "$vif" mode
 161                 case "$mode" in
 162                         adhoc|sta|ap|monitor|mesh)
 163                                 append $mode "$vif"
 164                         ;;
 165                         *) echo "$device($vif): Invalid mode, ignored."; continue;;
 166                 esac
 167         done
 168
 169         config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
 170 }
 171
 172 list_phy_interfaces() {
 173         local phy="$1"
 174         if [ -d "/sys/class/ieee80211/${phy}/device/net" ]; then
 175                 ls "/sys/class/ieee80211/${phy}/device/net" 2>/dev/null;
 176         else
 177                 ls "/sys/class/ieee80211/${phy}/device" 2>/dev/null | grep net: | sed -e 's,net:,,g'
 178         fi
 179 }
 180
 181 disable_mac80211() (
 182         local device="$1"
 183
 184         find_mac80211_phy "$device" || return 0
 185         config_get phy "$device" phy
 186
 187         set_wifi_down "$device"
 188         # kill all running hostapd and wpa_supplicant processes that
 189         # are running on atheros/mac80211 vifs
 190         for pid in `pidof hostapd`; do
 191                 grep -E "$phy" /proc/$pid/cmdline >/dev/null && \
 192                         kill $pid
 193         done
 194
 195         include /lib/network
 196         for wdev in $(list_phy_interfaces "$phy"); do
 197                 [ -f "/var/run/$wdev.pid" ] && kill $(cat /var/run/$wdev.pid) >&/dev/null 2>&1
 198                 for pid in `pidof wpa_supplicant`; do
 199                         grep "$wdev" /proc/$pid/cmdline >/dev/null && \
 200                                 kill $pid
 201                 done
 202                 ifconfig "$wdev" down 2>/dev/null
 203                 unbridge "$dev"
 204                 iw dev "$wdev" del
 205         done
 206
 207         return 0
 208 )
 209 get_freq() {
 210         local phy="$1"
 211         local chan="$2"
 212         iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
 213 }
 214 enable_mac80211() {
 215         local device="$1"
 216         config_get channel "$device" channel
 217         config_get vifs "$device" vifs
 218         config_get txpower "$device" txpower
 219         config_get country "$device" country
 220         config_get distance "$device" distance
 221         config_get frag "$device" frag
 222         config_get rts "$device" rts
 223         find_mac80211_phy "$device" || return 0
 224         config_get phy "$device" phy
 225         local i=0
 226         local macidx=0
 227         local apidx=0
 228         fixed=""
 229         local hostapd_ctrl=""
 230
 231         [ -n "$country" ] && iw reg set "$country"
 232         [ "$channel" = "auto" -o "$channel" = "0" ] || {
 233                 fixed=1
 234         }
 235
 236         [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
 237         [ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
 238         [ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"
 239
 240         export channel fixed
 241         # convert channel to frequency
 242         local freq="$(get_freq "$phy" "${fixed:+$channel}")"
 243
 244         wifi_fixup_hwmode "$device" "g"
 245         for vif in $vifs; do
 246                 while [ -d "/sys/class/net/wlan$i" ]; do
 247                         i=$(($i + 1))
 248                 done
 249
 250                 config_get ifname "$vif" ifname
 251                 [ -n "$ifname" ] || {
 252                         ifname="wlan$i"
 253                 }
 254                 config_set "$vif" ifname "$ifname"
 255
 256                 config_get mode "$vif" mode
 257                 config_get ssid "$vif" ssid
 258
 259                 # It is far easier to delete and create the desired interface
 260                 case "$mode" in
 261                         adhoc)
 262                                 iw phy "$phy" interface add "$ifname" type adhoc
 263                         ;;
 264                         ap)
 265                                 # Hostapd will handle recreating the interface and
 266                                 # it's accompanying monitor
 267                                 apidx="$(($apidx + 1))"
 268                                 i=$(($i + 1))
 269                                 [ "$apidx" -gt 1 ] || iw phy "$phy" interface add "$ifname" type managed
 270                         ;;
 271                         mesh)
 272                                 config_get mesh_id "$vif" mesh_id
 273                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 274                         ;;
 275                         monitor)
 276                                 iw phy "$phy" interface add "$ifname" type monitor
 277                         ;;
 278                         sta)
 279                                 local wdsflag
 280                                 config_get_bool wds "$vif" wds 0
 281                                 [ "$wds" -gt 0 ] && wdsflag="4addr on"
 282                                 iw phy "$phy" interface add "$ifname" type managed $wdsflag
 283                                 config_get_bool powersave "$vif" powersave 0
 284                                 [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
 285                                 iwconfig "$ifname" power "$powersave"
 286                         ;;
 287                 esac
 288
 289                 # All interfaces must have unique mac addresses
 290                 # which can either be explicitly set in the device
 291                 # section, or automatically generated
 292                 config_get macaddr "$device" macaddr
 293                 local mac_1="${macaddr%%:*}"
 294                 local mac_2="${macaddr#*:}"
 295
 296                 config_get vif_mac "$vif" macaddr
 297                 [ -n "$vif_mac" ] || {
 298                         if [ "$macidx" -gt 0 ]; then
 299                                 offset="$(( 2 + $macidx * 4 ))"
 300                         else
 301                                 offset="0"
 302                         fi
 303                         vif_mac="$( printf %02x $((0x$mac_1 + $offset)) ):$mac_2"
 304                         macidx="$(($macidx + 1))"
 305                 }
 306                 [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
 307                 config_set "$vif" macaddr "$vif_mac"
 308
 309                 # !! ap !!
 310                 #
 311                 # ALL ap functionality will be passed to hostapd
 312                 #
 313                 # !! station !!
 314                 #
 315                 # ALL station functionality will be passed to wpa_supplicant
 316                 #
 317                 if [ ! "$mode" = "ap" ]; then
 318                         # We attempt to set the channel for all interfaces, although
 319                         # mac80211 may not support it or the driver might not yet
 320                         # for ap mode this is handled by hostapd
 321                         [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
 322                 fi
 323
 324                 config_get vif_txpower "$vif" txpower
 325                 # use vif_txpower (from wifi-iface) to override txpower (from
 326                 # wifi-device) if the latter doesn't exist
 327                 txpower="${txpower:-$vif_txpower}"
 328                 [ -z "$txpower" ] || iw dev "$ifname" set txpower fixed "${txpower%%.*}00"
 329         done
 330
 331         local start_hostapd=
 332         rm -f /var/run/hostapd-$phy.conf
 333         for vif in $vifs; do
 334                 config_get mode "$vif" mode
 335                 [ "$mode" = "ap" ] || continue
 336                 mac80211_hostapd_setup_bss "$phy" "$vif"
 337                 start_hostapd=1
 338         done
 339
 340         [ -n "$start_hostapd" ] && {
 341                 hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
 342                         echo "Failed to start hostapd for $phy"
 343                         return
 344                 }
 345                 sleep 2
 346
 347                 for vif in $vifs; do
 348                         config_get mode "$vif" mode
 349                         config_get ifname "$vif" ifname
 350                         [ "$mode" = "ap" ] || continue
 351                         hostapd_ctrl="${hostapd_ctrl:-/var/run/hostapd-$phy/$ifname}"
 352                         mac80211_start_vif "$vif" "$ifname"
 353                 done
 354         }
 355
 356         for vif in $vifs; do
 357                 config_get mode "$vif" mode
 358                 config_get ifname "$vif" ifname
 359                 [ ! "$mode" = "ap" ] || continue
 360                 ifconfig "$ifname" up
 361
 362                 if [ ! "$mode" = "ap" ]; then
 363                         ifconfig "$ifname" up
 364                         case "$mode" in
 365                                 adhoc)
 366                                         config_get bssid "$vif" bssid
 367                                         config_get ssid "$vif" ssid
 368                                         config_get mcast_rate "$vif" mcast_rate
 369                                         local mcval=""
 370                                         [ -n "$mcast_rate" ] && {
 371                                                 mcval="$(($mcast_rate / 1000))"
 372                                                 mcsub="$(( ($mcast_rate / 100) % 10 ))"
 373                                                 [ "$mcsub" -gt 0 ] && mcval="$mcval.$mcsub"
 374                                         }
 375                                         iw dev "$ifname" ibss join "$ssid" $freq ${fixed:+fixed-freq} $bssid ${mcval:+mcast-rate $mcval}
 376                                 ;;
 377                                 sta)
 378                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 379                                                 wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" || {
 380                                                         echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 381                                                         # make sure this wifi interface won't accidentally stay open without encryption
 382                                                         ifconfig "$ifname" down
 383                                                         continue
 384                                                 }
 385                                         fi
 386                                 ;;
 387                         esac
 388                         mac80211_start_vif "$vif" "$ifname"
 389                 fi
 390         done
 391
 392 }
 393
 394
 395 check_device() {
 396         config_get phy "$1" phy
 397         [ -z "$phy" ] && {
 398                 find_mac80211_phy "$1" >/dev/null || return 0
 399                 config_get phy "$1" phy
 400         }
 401         [ "$phy" = "$dev" ] && found=1
 402 }
 403
 404 detect_mac80211() {
 405         devidx=0
 406         config_load wireless
 407         while :; do
 408                 config_get type "radio$devidx" type
 409                 [ -n "$type" ] || break
 410                 devidx=$(($devidx + 1))
 411         done
 412         for dev in $(ls /sys/class/ieee80211); do
 413                 found=0
 414                 config_foreach check_device wifi-device
 415                 [ "$found" -gt 0 ] && continue
 416
 417                 mode_11n=""
 418                 mode_band="g"
 419                 channel="11"
 420                 ht_cap=0
 421                 for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
 422                         ht_cap="$(($ht_cap | $cap))"
 423                 done
 424                 ht_capab="";
 425                 [ "$ht_cap" -gt 0 ] && {
 426                         mode_11n="n"
 427                         append ht_capab "       option htmode   HT20" "$N"
 428
 429                         list="  list ht_capab"
 430                         [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list  LDPC" "$N"
 431                         [ "$(($ht_cap & 16))" -eq 16 ] && append ht_capab "$list        GF" "$N"
 432                         [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list        SHORT-GI-20" "$N"
 433                         [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list        SHORT-GI-40" "$N"
 434                         [ "$(($ht_cap & 128))" -eq 128 ] && append ht_capab "$list      TX-STBC" "$N"
 435                         [ "$(($ht_cap & 768))" -eq 256 ] && append ht_capab "$list      RX-STBC1" "$N"
 436                         [ "$(($ht_cap & 768))" -eq 512 ] && append ht_capab "$list      RX-STBC12" "$N"
 437                         [ "$(($ht_cap & 768))" -eq 768 ] && append ht_capab "$list      RX-STBC123" "$N"
 438                         [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list    DSSS_CCK-40" "$N"
 439                 }
 440                 iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
 441
 442                 cat <<EOF
 443 config wifi-device  radio$devidx
 444         option type     mac80211
 445         option channel  ${channel}
 446         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 447         option hwmode   11${mode_11n}${mode_band}
 448 $ht_capab
 449         # REMOVE THIS LINE TO ENABLE WIFI:
 450         option disabled 1
 451
 452 config wifi-iface
 453         option device   radio$devidx
 454         option network  lan
 455         option mode     ap
 456         option ssid     OpenWrt
 457         option encryption none
 458
 459 EOF
 460         devidx=$(($devidx + 1))
 461         done
 462 }
 463