package/kernel/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
  10         config_get device "$vif" device
  11         config_get country "$device" country
  12         config_get hwmode "$device" hwmode
  13         config_get channel "$device" channel
  14         config_get beacon_int "$device" beacon_int
  15         config_get basic_rate_list "$device" basic_rate
  16         config_get_bool noscan "$device" noscan
  17
  18         hostapd_set_log_options base_cfg "$device"
  19
  20         [ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
  21
  22         [ "$channel" = auto ] && {
  23                 channel=$(iw phy "$phy" info | \
  24                         sed -ne '/MHz/ { /disabled\|passive\|radar/d; s/.*\[//; s/\].*//; p; q }')
  25                 config_set "$device" channel "$channel"
  26         }
  27
  28         [ -n "$hwmode" ] && {
  29                 config_get hwmode_11n "$device" hwmode_11n
  30                 [ -n "$hwmode_11n" ] && {
  31                         hwmode="$hwmode_11n"
  32                         append base_cfg "ieee80211n=1" "$N"
  33                         config_get htmode "$device" htmode
  34                         config_get ht_capab_list "$device" ht_capab
  35                         case "$htmode" in
  36                                 HT20|HT40+|HT40-) ht_capab="[$htmode]";;
  37                                 *)ht_capab=;;
  38                         esac
  39                         for cap in $ht_capab_list; do
  40                                 ht_capab="$ht_capab[$cap]"
  41                         done
  42                         [ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
  43                 }
  44         }
  45
  46         local country_ie=0
  47         [ -n "$country" ] && country_ie=1
  48         config_get_bool country_ie "$device" country_ie "$country_ie"
  49         [ "$country_ie" -gt 0 ] && append base_cfg "ieee80211d=1" "$N"
  50
  51         local br brval brstr
  52         [ -n "$basic_rate_list" ] && {
  53                 for br in $basic_rate_list; do
  54                         brval="$(($br / 100))"
  55                         [ -n "$brstr" ] && brstr="$brstr "
  56                         brstr="$brstr$brval"
  57                 done
  58         }
  59
  60         cat >> "$cfgfile" <<EOF
  61 ctrl_interface=/var/run/hostapd-$phy
  62 driver=nl80211
  63 wmm_ac_bk_cwmin=4
  64 wmm_ac_bk_cwmax=10
  65 wmm_ac_bk_aifs=7
  66 wmm_ac_bk_txop_limit=0
  67 wmm_ac_bk_acm=0
  68 wmm_ac_be_aifs=3
  69 wmm_ac_be_cwmin=4
  70 wmm_ac_be_cwmax=10
  71 wmm_ac_be_txop_limit=0
  72 wmm_ac_be_acm=0
  73 wmm_ac_vi_aifs=2
  74 wmm_ac_vi_cwmin=3
  75 wmm_ac_vi_cwmax=4
  76 wmm_ac_vi_txop_limit=94
  77 wmm_ac_vi_acm=0
  78 wmm_ac_vo_aifs=2
  79 wmm_ac_vo_cwmin=2
  80 wmm_ac_vo_cwmax=3
  81 wmm_ac_vo_txop_limit=47
  82 wmm_ac_vo_acm=0
  83 tx_queue_data3_aifs=7
  84 tx_queue_data3_cwmin=15
  85 tx_queue_data3_cwmax=1023
  86 tx_queue_data3_burst=0
  87 tx_queue_data2_aifs=3
  88 tx_queue_data2_cwmin=15
  89 tx_queue_data2_cwmax=63
  90 tx_queue_data2_burst=0
  91 tx_queue_data1_aifs=1
  92 tx_queue_data1_cwmin=7
  93 tx_queue_data1_cwmax=15
  94 tx_queue_data1_burst=3.0
  95 tx_queue_data0_aifs=1
  96 tx_queue_data0_cwmin=3
  97 tx_queue_data0_cwmax=7
  98 tx_queue_data0_burst=1.5
  99 ${hwmode:+hw_mode=$hwmode}
 100 ${channel:+channel=$channel}
 101 ${beacon_int:+beacon_int=$beacon_int}
 102 ${country:+country_code=$country}
 103 ${noscan:+noscan=$noscan}
 104 ${brstr:+basic_rates=$brstr}
 105 $base_cfg
 106
 107 EOF
 108 }
 109
 110 mac80211_hostapd_setup_bss() {
 111         local phy="$1"
 112         local vif="$2"
 113         local staidx="$3"
 114
 115         hostapd_cfg=
 116         cfgfile="/var/run/hostapd-$phy.conf"
 117         config_get ifname "$vif" ifname
 118
 119         if [ -f "$cfgfile" ]; then
 120                 append hostapd_cfg "bss=$ifname" "$N"
 121         else
 122                 mac80211_hostapd_setup_base "$phy" "$ifname"
 123                 append hostapd_cfg "interface=$ifname" "$N"
 124         fi
 125
 126         local net_cfg bridge
 127         net_cfg="$(find_net_config "$vif")"
 128         [ -z "$net_cfg" ] || bridge="$(bridge_interface "$net_cfg")"
 129         config_set "$vif" bridge "$bridge"
 130
 131         hostapd_set_bss_options hostapd_cfg "$vif"
 132
 133         config_get_bool wds "$vif" wds 0
 134         [ "$wds" -gt 0 ] && append hostapd_cfg "wds_sta=1" "$N"
 135
 136         [ "$staidx" -gt 0 ] && append hostapd_cfg "start_disabled=1" "$N"
 137
 138         local macaddr hidden maxassoc wmm
 139         config_get macaddr "$vif" macaddr
 140         config_get maxassoc "$vif" maxassoc
 141         config_get dtim_period "$vif" dtim_period
 142         config_get max_listen_int "$vif" max_listen_int
 143         config_get_bool hidden "$vif" hidden 0
 144         config_get_bool wmm "$vif" wmm 1
 145         cat >> /var/run/hostapd-$phy.conf <<EOF
 146 $hostapd_cfg
 147 wmm_enabled=$wmm
 148 bssid=$macaddr
 149 ignore_broadcast_ssid=$hidden
 150 ${dtim_period:+dtim_period=$dtim_period}
 151 ${max_listen_int:+max_listen_interval=$max_listen_int}
 152 ${maxassoc:+max_num_sta=$maxassoc}
 153 EOF
 154 }
 155
 156 mac80211_start_vif() {
 157         local vif="$1"
 158         local ifname="$2"
 159
 160         local net_cfg
 161         net_cfg="$(find_net_config "$vif")"
 162         [ -z "$net_cfg" ] || start_net "$ifname" "$net_cfg"
 163
 164         set_wifi_up "$vif" "$ifname"
 165 }
 166
 167 lookup_phy() {
 168         [ -n "$phy" ] && {
 169                 [ -d /sys/class/ieee80211/$phy ] && return
 170         }
 171
 172         local devpath
 173         config_get devpath "$device" path
 174         [ -n "$devpath" -a -d "/sys/devices/$devpath/ieee80211" ] && {
 175                 phy="$(ls /sys/devices/$devpath/ieee80211 | grep -m 1 phy)"
 176                 [ -n "$phy" ] && return
 177         }
 178
 179         local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
 180         [ -n "$macaddr" ] && {
 181                 for _phy in $(ls /sys/class/ieee80211 2>/dev/null); do
 182                         [ "$macaddr" = "$(cat /sys/class/ieee80211/${_phy}/macaddress)" ] || continue
 183                         phy="$_phy"
 184                         return
 185                 done
 186         }
 187         phy=
 188         return
 189 }
 190
 191 find_mac80211_phy() {
 192         local device="$1"
 193
 194         config_get phy "$device" phy
 195         lookup_phy
 196         [ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
 197                 echo "PHY for wifi device $1 not found"
 198                 return 1
 199         }
 200         config_set "$device" phy "$phy"
 201
 202         config_get macaddr "$device" macaddr
 203         [ -z "$macaddr" ] && {
 204                 config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
 205         }
 206
 207         return 0
 208 }
 209
 210 scan_mac80211() {
 211         local device="$1"
 212         local adhoc sta ap monitor mesh disabled
 213
 214         config_get vifs "$device" vifs
 215         for vif in $vifs; do
 216                 config_get_bool disabled "$vif" disabled 0
 217                 [ $disabled = 0 ] || continue
 218
 219                 config_get mode "$vif" mode
 220                 case "$mode" in
 221                         adhoc|sta|ap|monitor|mesh)
 222                                 append $mode "$vif"
 223                         ;;
 224                         *) echo "$device($vif): Invalid mode, ignored."; continue;;
 225                 esac
 226         done
 227
 228         config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
 229 }
 230
 231 list_phy_interfaces() {
 232         local phy="$1"
 233         if [ -d "/sys/class/ieee80211/${phy}/device/net" ]; then
 234                 ls "/sys/class/ieee80211/${phy}/device/net" 2>/dev/null;
 235         else
 236                 ls "/sys/class/ieee80211/${phy}/device" 2>/dev/null | grep net: | sed -e 's,net:,,g'
 237         fi
 238 }
 239
 240 disable_mac80211() (
 241         local device="$1"
 242
 243         find_mac80211_phy "$device" || return 0
 244         config_get phy "$device" phy
 245
 246         set_wifi_down "$device"
 247         # kill all running hostapd and wpa_supplicant processes that
 248         # are running on atheros/mac80211 vifs
 249         for pid in `pidof hostapd`; do
 250                 grep -E "$phy" /proc/$pid/cmdline >/dev/null && \
 251                         kill $pid
 252         done
 253
 254         include /lib/network
 255         for wdev in $(list_phy_interfaces "$phy"); do
 256                 [ -f "/var/run/$wdev.pid" ] && kill $(cat /var/run/$wdev.pid) >&/dev/null 2>&1
 257                 for pid in `pidof wpa_supplicant meshd-nl80211`; do
 258                         grep "$wdev" /proc/$pid/cmdline >/dev/null && \
 259                                 kill $pid
 260                 done
 261                 ifconfig "$wdev" down 2>/dev/null
 262                 unbridge "$dev"
 263                 iw dev "$wdev" del
 264         done
 265
 266         return 0
 267 )
 268
 269 get_freq() {
 270         local phy="$1"
 271         local chan="$2"
 272         iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
 273 }
 274
 275 mac80211_generate_mac() {
 276         local id="$1"
 277         local ref="$2"
 278         local mask="$3"
 279
 280         [ "$mask" = "00:00:00:00:00:00" ] && mask="ff:ff:ff:ff:ff:ff";
 281         local oIFS="$IFS"; IFS=":"; set -- $mask; IFS="$oIFS"
 282
 283         local mask1=$1
 284         local mask6=$6
 285
 286         local oIFS="$IFS"; IFS=":"; set -- $ref; IFS="$oIFS"
 287         [ "$((0x$mask1))" -gt 0 ] && {
 288                 b1="0x$1"
 289                 [ "$id" -gt 0 ] && \
 290                         b1=$(($b1 ^ ((($id - 1) << 2) | 0x2)))
 291                 printf "%02x:%s:%s:%s:%s:%s" $b1 $2 $3 $4 $5 $6
 292                 return
 293         }
 294
 295         [ "$((0x$mask6))" -lt 255 ] && {
 296                 printf "%s:%s:%s:%s:%s:%02x" $1 $2 $3 $4 $5 $(( 0x$6 ^ $id ))
 297                 return
 298         }
 299
 300         off2=$(( (0x$6 + $id) / 0x100 ))
 301         printf "%s:%s:%s:%s:%02x:%02x" \
 302                 $1 $2 $3 $4 \
 303                 $(( (0x$5 + $off2) % 0x100 )) \
 304                 $(( (0x$6 + $id) % 0x100 ))
 305 }
 306
 307 enable_mac80211() {
 308         local device="$1"
 309         config_get channel "$device" channel
 310         config_get vifs "$device" vifs
 311         config_get txpower "$device" txpower
 312         config_get country "$device" country
 313         config_get distance "$device" distance
 314         config_get txantenna "$device" txantenna all
 315         config_get rxantenna "$device" rxantenna all
 316         config_get antenna_gain "$device" antenna_gain 0
 317         config_get frag "$device" frag
 318         config_get rts "$device" rts
 319         find_mac80211_phy "$device" || return 0
 320         config_get phy "$device" phy
 321         local i=0
 322         local macidx=0
 323         local apidx=0
 324         local staidx=0
 325         fixed=""
 326         local hostapd_ctrl=""
 327
 328         [ -n "$country" ] && {
 329                 iw reg get | grep -q "^country $country:" || {
 330                         iw reg set "$country"
 331                         sleep 1
 332                 }
 333         }
 334
 335         config_get chanbw "$device" chanbw
 336         [ -n "$chanbw" -a -d /sys/kernel/debug/ieee80211/$phy/ath9k ] && echo "$chanbw" > /sys/kernel/debug/ieee80211/$phy/ath9k/chanbw
 337         [ -n "$chanbw" -a -d /sys/kernel/debug/ieee80211/$phy/ath5k ] && echo "$chanbw" > /sys/kernel/debug/ieee80211/$phy/ath5k/bwmode
 338
 339         [ "$channel" = "auto" -o "$channel" = "0" ] || {
 340                 fixed=1
 341         }
 342
 343         iw phy "$phy" set antenna $txantenna $rxantenna >/dev/null 2>&1
 344         iw phy "$phy" set antenna_gain $antenna_gain
 345
 346         [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
 347         [ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
 348         [ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"
 349
 350         export channel fixed
 351         # convert channel to frequency
 352         local freq="$(get_freq "$phy" "${fixed:+$channel}")"
 353
 354         wifi_fixup_hwmode "$device" "g"
 355         for vif in $vifs; do
 356                 config_get ifname "$vif" ifname
 357                 [ -n "$ifname" ] || {
 358                         [ $i -gt 0 ] && ifname="wlan${phy#phy}-$i" || ifname="wlan${phy#phy}"
 359                 }
 360                 config_set "$vif" ifname "$ifname"
 361
 362                 config_get mode "$vif" mode
 363                 config_get ssid "$vif" ssid
 364
 365                 # It is far easier to delete and create the desired interface
 366                 case "$mode" in
 367                         adhoc)
 368                                 iw phy "$phy" interface add "$ifname" type adhoc
 369                         ;;
 370                         ap)
 371                                 # Hostapd will handle recreating the interface and
 372                                 # it's accompanying monitor
 373                                 apidx="$(($apidx + 1))"
 374                                 [ "$apidx" -gt 1 ] || iw phy "$phy" interface add "$ifname" type managed
 375                         ;;
 376                         mesh)
 377                                 config_get key "$vif" key ""
 378                                 if [ -n "$key" ]; then
 379                                         iw phy "$phy" interface add "$ifname" type mp
 380                                 else
 381                                         config_get mesh_id "$vif" mesh_id
 382                                         iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 383                                 fi
 384                         ;;
 385                         monitor)
 386                                 iw phy "$phy" interface add "$ifname" type monitor
 387                         ;;
 388                         sta)
 389                                 local wdsflag
 390                                 staidx="$(($staidx + 1))"
 391                                 config_get_bool wds "$vif" wds 0
 392                                 [ "$wds" -gt 0 ] && wdsflag="4addr on"
 393                                 iw phy "$phy" interface add "$ifname" type managed $wdsflag
 394                                 config_get_bool powersave "$vif" powersave 0
 395                                 [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
 396                                 iw "$ifname" set power_save "$powersave"
 397                         ;;
 398                 esac
 399
 400                 # All interfaces must have unique mac addresses
 401                 # which can either be explicitly set in the device
 402                 # section, or automatically generated
 403                 config_get macaddr "$device" macaddr
 404                 config_get vif_mac "$vif" macaddr
 405                 [ -n "$vif_mac" ] || {
 406                         vif_mac="$(mac80211_generate_mac $macidx $macaddr $(cat /sys/class/ieee80211/${phy}/address_mask))"
 407                         macidx="$(($macidx + 1))"
 408                 }
 409                 [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
 410                 config_set "$vif" macaddr "$vif_mac"
 411
 412                 # !! ap !!
 413                 #
 414                 # ALL ap functionality will be passed to hostapd
 415                 #
 416                 # !! station !!
 417                 #
 418                 # ALL station functionality will be passed to wpa_supplicant
 419                 #
 420                 if [ ! "$mode" = "ap" ]; then
 421                         # We attempt to set the channel for all interfaces, although
 422                         # mac80211 may not support it or the driver might not yet
 423                         # for ap mode this is handled by hostapd
 424                         config_get htmode "$device" htmode
 425                         case "$htmode" in
 426                                 HT20|HT40+|HT40-) ;;
 427                                 *) htmode= ;;
 428                         esac
 429                         [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel" $htmode
 430                 fi
 431
 432                 i=$(($i + 1))
 433         done
 434
 435         local start_hostapd=
 436         rm -f /var/run/hostapd-$phy.conf
 437         for vif in $vifs; do
 438                 config_get mode "$vif" mode
 439                 case "$mode" in
 440                         ap)
 441                                 mac80211_hostapd_setup_bss "$phy" "$vif" "$staidx"
 442                                 start_hostapd=1
 443                         ;;
 444                         mesh)
 445                                 config_get key "$vif" key ""
 446                                 [ -n "$key" ] && authsae_start_interface "$device" "$vif"
 447                         ;;
 448                 esac
 449         done
 450
 451         [ -n "$start_hostapd" ] && {
 452                 hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
 453                         echo "Failed to start hostapd for $phy"
 454                         return
 455                 }
 456                 sleep 2
 457
 458                 for vif in $vifs; do
 459                         config_get mode "$vif" mode
 460                         config_get ifname "$vif" ifname
 461                         [ "$mode" = "ap" ] || continue
 462                         hostapd_ctrl="${hostapd_ctrl:-/var/run/hostapd-$phy/$ifname}"
 463                         mac80211_start_vif "$vif" "$ifname"
 464                 done
 465         }
 466
 467         for vif in $vifs; do
 468                 config_get mode "$vif" mode
 469                 config_get ifname "$vif" ifname
 470                 [ "$mode" = "ap" ] || ifconfig "$ifname" up
 471
 472                 config_get vif_txpower "$vif" txpower
 473                 # use vif_txpower (from wifi-iface) to override txpower (from
 474                 # wifi-device) if the latter doesn't exist
 475                 txpower="${txpower:-$vif_txpower}"
 476                 [ -z "$txpower" ] || iw dev "$ifname" set txpower fixed "${txpower%%.*}00"
 477
 478                 case "$mode" in
 479                         adhoc)
 480                                 config_get bssid "$vif" bssid
 481                                 config_get ssid "$vif" ssid
 482                                 config_get beacon_int "$device" beacon_int
 483                                 config_get basic_rate_list "$device" basic_rate
 484                                 config_get encryption "$vif" encryption
 485                                 config_get key "$vif" key 1
 486                                 config_get mcast_rate "$vif" mcast_rate
 487                                 config_get htmode "$device" htmode
 488                                 case "$htmode" in
 489                                         HT20|HT40+|HT40-) ;;
 490                                         *) htmode= ;;
 491                                 esac
 492
 493
 494                                 local keyspec=""
 495                                 [ "$encryption" == "psk" -o "$encryption" == "psk2" ] && {
 496                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 497                                                 wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" $freq $htmode || {
 498                                                         echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 499                                                         # make sure this wifi interface won't accidentally stay open without encryption
 500                                                         ifconfig "$ifname" down
 501                                                 }
 502                                                 mac80211_start_vif "$vif" "$ifname"
 503                                                 continue
 504                                         fi
 505                                 }
 506
 507                                 [ "$encryption" == "wep" ] && {
 508                                         case "$key" in
 509                                                 [1234])
 510                                                         local idx
 511                                                         for idx in 1 2 3 4; do
 512                                                                 local ikey
 513                                                                 config_get ikey "$vif" "key$idx"
 514
 515                                                                 [ -n "$ikey" ] && {
 516                                                                         ikey="$(($idx - 1)):$(prepare_key_wep "$ikey")"
 517                                                                         [ $idx -eq $key ] && ikey="d:$ikey"
 518                                                                         append keyspec "$ikey"
 519                                                                 }
 520                                                         done
 521                                                 ;;
 522                                                 *) append keyspec "d:0:$(prepare_key_wep "$key")" ;;
 523                                         esac
 524                                 }
 525
 526                                 local br brval brsub brstr
 527                                 [ -n "$basic_rate_list" ] && {
 528                                         for br in $basic_rate_list; do
 529                                                 brval="$(($br / 1000))"
 530                                                 brsub="$((($br / 100) % 10))"
 531                                                 [ "$brsub" -gt 0 ] && brval="$brval.$brsub"
 532                                                 [ -n "$brstr" ] && brstr="$brstr,"
 533                                                 brstr="$brstr$brval"
 534                                         done
 535                                 }
 536
 537                                 local mcval=""
 538                                 [ -n "$mcast_rate" ] && {
 539                                         mcval="$(($mcast_rate / 1000))"
 540                                         mcsub="$(( ($mcast_rate / 100) % 10 ))"
 541                                         [ "$mcsub" -gt 0 ] && mcval="$mcval.$mcsub"
 542                                 }
 543
 544                                 iw dev "$ifname" ibss join "$ssid" $freq $htmode \
 545                                         ${fixed:+fixed-freq} $bssid \
 546                                         ${beacon_int:+beacon-interval $beacon_int} \
 547                                         ${brstr:+basic-rates $brstr} \
 548                                         ${mcval:+mcast-rate $mcval} \
 549                                         ${keyspec:+keys $keyspec}
 550                         ;;
 551                         mesh)
 552                                 mp_list="mesh_retry_timeout mesh_confirm_timeout mesh_holding_timeout mesh_max_peer_links
 553                                         mesh_max_retries mesh_ttl mesh_element_ttl mesh_auto_open_plinks mesh_hwmp_max_preq_retries
 554                                         mesh_path_refresh_time mesh_min_discovery_timeout mesh_hwmp_active_path_timeout
 555                                         mesh_hwmp_preq_min_interval mesh_hwmp_net_diameter_traversal_time mesh_hwmp_rootmode
 556                                         mesh_hwmp_rann_interval mesh_gate_announcements mesh_fwding mesh_sync_offset_max_neighor
 557                                         mesh_rssi_threshold mesh_hwmp_active_path_to_root_timeout mesh_hwmp_root_interval
 558                                         mesh_hwmp_confirmation_interval mesh_power_mode mesh_awake_window"
 559                                 for mp in $mp_list
 560                                 do
 561                                         config_get mp_val "$vif" "$mp" ""
 562                                         [ -n "$mp_val" ] && iw dev "$ifname" set mesh_param "$mp" "$mp_val"
 563                                 done
 564                         ;;
 565                         sta)
 566                                 if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 567                                         wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" || {
 568                                                 echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 569                                                 # make sure this wifi interface won't accidentally stay open without encryption
 570                                                 ifconfig "$ifname" down
 571                                                 continue
 572                                         }
 573                                 fi
 574                         ;;
 575                 esac
 576                 [ "$mode" = "ap" ] || mac80211_start_vif "$vif" "$ifname"
 577         done
 578
 579 }
 580
 581
 582 check_mac80211_device() {
 583         config_get phy "$1" phy
 584         [ -z "$phy" ] && {
 585                 find_mac80211_phy "$1" >/dev/null || return 0
 586                 config_get phy "$1" phy
 587         }
 588         [ "$phy" = "$dev" ] && found=1
 589 }
 590
 591 detect_mac80211() {
 592         devidx=0
 593         config_load wireless
 594         while :; do
 595                 config_get type "radio$devidx" type
 596                 [ -n "$type" ] || break
 597                 devidx=$(($devidx + 1))
 598         done
 599         for dev in $(ls /sys/class/ieee80211); do
 600                 found=0
 601                 config_foreach check_mac80211_device wifi-device
 602                 [ "$found" -gt 0 ] && continue
 603
 604                 mode_11n=""
 605                 mode_band="g"
 606                 channel="11"
 607                 ht_cap=0
 608                 for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
 609                         ht_cap="$(($ht_cap | $cap))"
 610                 done
 611                 ht_capab="";
 612                 [ "$ht_cap" -gt 0 ] && {
 613                         mode_11n="n"
 614                         append ht_capab "       option htmode   HT20" "$N"
 615
 616                         list="  list ht_capab"
 617                         [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list  LDPC" "$N"
 618                         [ "$(($ht_cap & 16))" -eq 16 ] && append ht_capab "$list        GF" "$N"
 619                         [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list        SHORT-GI-20" "$N"
 620                         [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list        SHORT-GI-40" "$N"
 621                         [ "$(($ht_cap & 128))" -eq 128 ] && append ht_capab "$list      TX-STBC" "$N"
 622                         [ "$(($ht_cap & 768))" -eq 256 ] && append ht_capab "$list      RX-STBC1" "$N"
 623                         [ "$(($ht_cap & 768))" -eq 512 ] && append ht_capab "$list      RX-STBC12" "$N"
 624                         [ "$(($ht_cap & 768))" -eq 768 ] && append ht_capab "$list      RX-STBC123" "$N"
 625                         [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list    DSSS_CCK-40" "$N"
 626                 }
 627                 iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
 628
 629                 if [ -x /usr/bin/readlink ]; then
 630                         path="$(readlink -f /sys/class/ieee80211/${dev}/device)"
 631                         path="${path##/sys/devices/}"
 632                         dev_id="        option path     '$path'"
 633                 else
 634                         dev_id="        option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)"
 635                 fi
 636
 637                 cat <<EOF
 638 config wifi-device  radio$devidx
 639         option type     mac80211
 640         option channel  ${channel}
 641         option hwmode   11${mode_11n}${mode_band}
 642 $dev_id
 643 $ht_capab
 644         # REMOVE THIS LINE TO ENABLE WIFI:
 645         option disabled 1
 646
 647 config wifi-iface
 648         option device   radio$devidx
 649         option network  lan
 650         option mode     ap
 651         option ssid     OpenWrt
 652         option encryption none
 653
 654 EOF
 655         devidx=$(($devidx + 1))
 656         done
 657 }
 658