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         [ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
  14         [ "$channel" = auto ] && channel=
  15         [ -n "$hwmode" ] && {
  16                 config_get hwmode_11n "$device" hwmode_11n
  17                 [ -n "$hwmode_11n" ] && {
  18                         hwmode="$hwmode_11n"
  19                         append base_cfg "ieee80211n=1" "$N"
  20                         config_get htmode "$device" htmode
  21                         config_get ht_capab_list "$device" ht_capab
  22                         case "$htmode" in
  23                                 HT20|HT40+|HT40-) ht_capab="[$htmode]";;
  24                                 *)ht_capab=;;
  25                         esac
  26                         for cap in $ht_capab_list; do
  27                                 ht_capab="$ht_capab[$cap]"
  28                         done
  29                         [ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
  30                 }
  31         }
  32         cat > "$cfgfile" <<EOF
  33 ctrl_interface=/var/run/hostapd-$phy
  34 driver=nl80211
  35 wmm_ac_bk_cwmin=4
  36 wmm_ac_bk_cwmax=10
  37 wmm_ac_bk_aifs=7
  38 wmm_ac_bk_txop_limit=0
  39 wmm_ac_bk_acm=0
  40 wmm_ac_be_aifs=3
  41 wmm_ac_be_cwmin=4
  42 wmm_ac_be_cwmax=10
  43 wmm_ac_be_txop_limit=0
  44 wmm_ac_be_acm=0
  45 wmm_ac_vi_aifs=2
  46 wmm_ac_vi_cwmin=3
  47 wmm_ac_vi_cwmax=4
  48 wmm_ac_vi_txop_limit=94
  49 wmm_ac_vi_acm=0
  50 wmm_ac_vo_aifs=2
  51 wmm_ac_vo_cwmin=2
  52 wmm_ac_vo_cwmax=3
  53 wmm_ac_vo_txop_limit=47
  54 wmm_ac_vo_acm=0
  55 tx_queue_data3_aifs=7
  56 tx_queue_data3_cwmin=15
  57 tx_queue_data3_cwmax=1023
  58 tx_queue_data3_burst=0
  59 tx_queue_data2_aifs=3
  60 tx_queue_data2_cwmin=15
  61 tx_queue_data2_cwmax=63
  62 tx_queue_data2_burst=0
  63 tx_queue_data1_aifs=1
  64 tx_queue_data1_cwmin=7
  65 tx_queue_data1_cwmax=15
  66 tx_queue_data1_burst=3.0
  67 tx_queue_data0_aifs=1
  68 tx_queue_data0_cwmin=3
  69 tx_queue_data0_cwmax=7
  70 tx_queue_data0_burst=1.5
  71 ${hwmode:+hw_mode=$hwmode}
  72 ${channel:+channel=$channel}
  73 ${country:+country_code=$country}
  74 $base_cfg
  75
  76 EOF
  77 }
  78
  79 mac80211_hostapd_setup_bss() {
  80         local phy="$1"
  81         local vif="$2"
  82
  83         hostapd_cfg=
  84         cfgfile="/var/run/hostapd-$phy.conf"
  85         config_get ifname "$vif" ifname
  86
  87         if [ -f "$cfgfile" ]; then
  88                 append hostapd_cfg "bss=$ifname" "$N"
  89         else
  90                 mac80211_hostapd_setup_base "$phy" "$ifname"
  91                 append hostapd_cfg "interface=$ifname" "$N"
  92         fi
  93
  94         local net_cfg bridge
  95         net_cfg="$(find_net_config "$vif")"
  96         [ -z "$net_cfg" ] || bridge="$(bridge_interface "$net_cfg")"
  97         config_set "$vif" bridge "$bridge"
  98
  99         hostapd_set_bss_options hostapd_cfg "$vif"
 100
 101         config_get_bool wds "$vif" wds 0
 102         [ "$wds" -gt 0 ] && append hostapd_cfg "wds_sta=1" "$N"
 103
 104         config_get macaddr "$vif" macaddr
 105         config_get_bool hidden "$vif" hidden 0
 106         cat >> /var/run/hostapd-$phy.conf <<EOF
 107 $hostapd_cfg
 108 wmm_enabled=1
 109 bssid=$macaddr
 110 ignore_broadcast_ssid=$hidden
 111 EOF
 112 }
 113
 114 mac80211_start_vif() {
 115         local vif="$1"
 116         local ifname="$2"
 117
 118         local net_cfg
 119         net_cfg="$(find_net_config "$vif")"
 120         [ -z "$net_cfg" ] || start_net "$ifname" "$net_cfg"
 121
 122         set_wifi_up "$vif" "$ifname"
 123 }
 124
 125 find_mac80211_phy() {
 126         local device="$1"
 127
 128         local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
 129         config_get phy "$device" phy
 130         [ -z "$phy" -a -n "$macaddr" ] && {
 131                 for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
 132                         [ "$macaddr" = "$(cat /sys/class/ieee80211/${phy}/macaddress)" ] || continue
 133                         config_set "$device" phy "$phy"
 134                         break
 135                 done
 136                 config_get phy "$device" phy
 137         }
 138         [ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
 139                 echo "PHY for wifi device $1 not found"
 140                 return 1
 141         }
 142         [ -z "$macaddr" ] && {
 143                 config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
 144         }
 145         return 0
 146 }
 147
 148 scan_mac80211() {
 149         local device="$1"
 150         local adhoc sta ap monitor mesh
 151
 152         config_get vifs "$device" vifs
 153         for vif in $vifs; do
 154                 config_get mode "$vif" mode
 155                 case "$mode" in
 156                         adhoc|sta|ap|monitor|mesh)
 157                                 append $mode "$vif"
 158                         ;;
 159                         *) echo "$device($vif): Invalid mode, ignored."; continue;;
 160                 esac
 161         done
 162
 163         config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
 164 }
 165
 166
 167 disable_mac80211() (
 168         local device="$1"
 169
 170         find_mac80211_phy "$device" || return 0
 171         config_get phy "$device" phy
 172
 173         set_wifi_down "$device"
 174         # kill all running hostapd and wpa_supplicant processes that
 175         # are running on atheros/mac80211 vifs
 176         for pid in `pidof hostapd`; do
 177                 grep -E "$phy" /proc/$pid/cmdline >/dev/null && \
 178                         kill $pid
 179         done
 180
 181         include /lib/network
 182         for wdev in $(ls /sys/class/ieee80211/${phy}/device/net 2>/dev/null); do
 183                 [ -f "/var/run/$wdev.pid" ] && kill $(cat /var/run/$wdev.pid) >&/dev/null 2>&1
 184                 for pid in `pidof wpa_supplicant`; do
 185                         grep "$wdev" /proc/$pid/cmdline >/dev/null && \
 186                                 kill $pid
 187                 done
 188                 ifconfig "$wdev" down 2>/dev/null
 189                 unbridge "$dev"
 190                 iw dev "$wdev" del
 191         done
 192
 193         return 0
 194 )
 195 get_freq() {
 196         local phy="$1"
 197         local chan="$2"
 198         iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
 199 }
 200 enable_mac80211() {
 201         local device="$1"
 202         config_get channel "$device" channel
 203         config_get vifs "$device" vifs
 204         config_get txpower "$device" txpower
 205         config_get country "$device" country
 206         config_get distance "$device" distance
 207         find_mac80211_phy "$device" || return 0
 208         config_get phy "$device" phy
 209         local i=0
 210         local macidx=0
 211         local apidx=0
 212         fixed=""
 213
 214         [ -n "$country" ] && iw reg set "$country"
 215         [ "$channel" = "auto" -o "$channel" = "0" ] || {
 216                 fixed=1
 217         }
 218
 219         [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
 220
 221         export channel fixed
 222         # convert channel to frequency
 223         local freq="$(get_freq "$phy" "${fixed:+$channel}")"
 224
 225         wifi_fixup_hwmode "$device" "g"
 226         for vif in $vifs; do
 227                 while [ -d "/sys/class/net/wlan$i" ]; do
 228                         i=$(($i + 1))
 229                 done
 230
 231                 config_get ifname "$vif" ifname
 232                 [ -n "$ifname" ] || {
 233                         ifname="wlan$i"
 234                 }
 235                 config_set "$vif" ifname "$ifname"
 236
 237                 config_get enc "$vif" encryption
 238                 config_get mode "$vif" mode
 239                 config_get ssid "$vif" ssid
 240
 241                 # It is far easier to delete and create the desired interface
 242                 case "$mode" in
 243                         adhoc)
 244                                 iw phy "$phy" interface add "$ifname" type adhoc
 245                         ;;
 246                         ap)
 247                                 # Hostapd will handle recreating the interface and
 248                                 # it's accompanying monitor
 249                                 apidx="$(($apidx + 1))"
 250                                 i=$(($i + 1))
 251                                 [ "$apidx" -gt 1 ] || iw phy "$phy" interface add "$ifname" type managed
 252                         ;;
 253                         mesh)
 254                                 config_get mesh_id "$vif" mesh_id
 255                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 256                         ;;
 257                         monitor)
 258                                 iw phy "$phy" interface add "$ifname" type monitor
 259                         ;;
 260                         sta)
 261                                 local wdsflag
 262                                 config_get_bool wds "$vif" wds 0
 263                                 [ "$wds" -gt 0 ] && wdsflag="4addr on"
 264                                 iw phy "$phy" interface add "$ifname" type managed $wdsflag
 265                                 config_get_bool powersave "$vif" powersave 0
 266                                 [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
 267                                 iwconfig "$ifname" power "$powersave"
 268                         ;;
 269                 esac
 270
 271                 # All interfaces must have unique mac addresses
 272                 # which can either be explicitly set in the device
 273                 # section, or automatically generated
 274                 config_get macaddr "$device" macaddr
 275                 local mac_1="${macaddr%%:*}"
 276                 local mac_2="${macaddr#*:}"
 277
 278                 config_get vif_mac "$vif" macaddr
 279                 [ -n "$vif_mac" ] || {
 280                         if [ "$macidx" -gt 0 ]; then
 281                                 offset="$(( 2 + $macidx * 4 ))"
 282                         else
 283                                 offset="0"
 284                         fi
 285                         vif_mac="$( printf %02x $((0x$mac_1 + $offset)) ):$mac_2"
 286                         macidx="$(($macidx + 1))"
 287                 }
 288                 [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
 289                 config_set "$vif" macaddr "$vif_mac"
 290
 291                 # Valid values are:
 292                 # wpa / wep / none
 293                 #
 294                 # !! ap !!
 295                 #
 296                 # ALL ap functionality will be passed to hostapd
 297                 #
 298                 # !! mesh / adhoc / station !!
 299                 # none -> NO encryption
 300                 #
 301                 # wep + keymgmt = '' -> we use iw to connect to the
 302                 # network.
 303                 #
 304                 # wep + keymgmt = 'NONE' -> wpa_supplicant will be
 305                 # configured to handle the wep connection
 306                 if [ ! "$mode" = "ap" ]; then
 307                         # We attempt to set the channel for all interfaces, although
 308                         # mac80211 may not support it or the driver might not yet
 309                         # for ap mode this is handled by hostapd
 310                         [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
 311
 312                         local key keystring
 313
 314                         case "$enc" in
 315                                 *wep*)
 316                                         config_get keymgmt "$vif" keymgmt
 317                                         if [ -z "$keymgmt" ]; then
 318                                                 config_get key "$vif" key
 319                                                 key="${key:-1}"
 320                                                 case "$key" in
 321                                                         [1234])
 322                                                                 for idx in 1 2 3 4; do
 323                                                                         local zidx
 324                                                                         zidx=$(($idx - 1))
 325                                                                         config_get ckey "$vif" "key${idx}"
 326                                                                         if [ -n "$ckey" ]; then
 327                                                                                 [ $idx -eq $key ] && zidx="d:${zidx}"
 328                                                                                 append keystring "${zidx}:$(prepare_key_wep "$ckey")"
 329                                                                         fi
 330                                                                 done
 331                                                                 ;;
 332                                                         *)
 333                                                                 keystring="d:0:$(prepare_key_wep "$key")"
 334                                                                 ;;
 335                                                 esac
 336                                         fi
 337                                 ;;
 338                                 *psk*|*wpa*)
 339                                         config_get key "$vif" key
 340                                 ;;
 341                         esac
 342                 fi
 343
 344                 # txpower is not yet implemented in iw
 345                 config_get vif_txpower "$vif" txpower
 346                 # use vif_txpower (from wifi-iface) to override txpower (from
 347                 # wifi-device) if the latter doesn't exist
 348                 txpower="${txpower:-$vif_txpower}"
 349                 [ -z "$txpower" ] || iwconfig "$ifname" txpower "${txpower%%.*}"
 350
 351                 config_get frag "$vif" frag
 352                 if [ -n "$frag" ]; then
 353                         iw phy "$phy" set frag "${frag%%.*}"
 354                 fi
 355
 356                 config_get rts "$vif" rts
 357                 if [ -n "$rts" ]; then
 358                         iw phy "$phy" set rts "${rts%%.*}"
 359                 fi
 360
 361                 ifconfig "$ifname" up
 362
 363                 [ "$mode" = "ap" ] || mac80211_start_vif "$vif" "$ifname"
 364
 365                 case "$mode" in
 366                         adhoc)
 367                                 config_get bssid "$vif" bssid
 368                                 iw dev "$ifname" ibss join "$ssid" $freq ${fixed:+fixed-freq} $bssid
 369                         ;;
 370                         sta|mesh)
 371                                 config_get bssid "$vif" bssid
 372                                 case "$enc" in
 373                                         *wep*)
 374                                                 if [ -z "$keymgmt" ]; then
 375                                                         [ -n "$keystring" ] &&
 376                                                                 iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid key $keystring
 377                                                 else
 378                                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 379                                                                 wpa_supplicant_setup_vif "$vif" wext || {
 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                                                 fi
 387                                         ;;
 388                                         *wpa*|*psk*)
 389                                                 config_get key "$vif" key
 390                                                 if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 391                                                         wpa_supplicant_setup_vif "$vif" wext || {
 392                                                                 echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 393                                                                 # make sure this wifi interface won't accidentally stay open without encryption
 394                                                                 ifconfig "$ifname" down
 395                                                                 continue
 396                                                         }
 397                                                 fi
 398                                         ;;
 399                                         *)
 400                                                 iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid
 401                                         ;;
 402                                 esac
 403
 404                         ;;
 405                 esac
 406         done
 407
 408         local start_hostapd=
 409         rm -f /var/run/hostapd-$phy.conf
 410         for vif in $vifs; do
 411                 config_get mode "$vif" mode
 412                 [ "$mode" = "ap" ] || continue
 413                 mac80211_hostapd_setup_bss "$phy" "$vif"
 414                 start_hostapd=1
 415         done
 416
 417         [ -n "$start_hostapd" ] || return 0
 418
 419         hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
 420                 echo "Failed to start hostapd for $phy"
 421                 return
 422         }
 423         sleep 2
 424
 425         for vif in $vifs; do
 426                 config_get mode "$vif" mode
 427                 config_get ifname "$vif" ifname
 428                 [ "$mode" = "ap" ] || continue
 429                 mac80211_start_vif "$vif" "$ifname"
 430         done
 431 }
 432
 433
 434 check_device() {
 435         config_get phy "$1" phy
 436         [ -z "$phy" ] && {
 437                 find_mac80211_phy "$1" >/dev/null || return 0
 438                 config_get phy "$1" phy
 439         }
 440         [ "$phy" = "$dev" ] && found=1
 441 }
 442
 443 detect_mac80211() {
 444         devidx=0
 445         config_load wireless
 446         while :; do
 447                 config_get type "radio$devidx" type
 448                 [ -n "$type" ] || break
 449                 devidx=$(($devidx + 1))
 450         done
 451         for dev in $(ls /sys/class/ieee80211); do
 452                 found=0
 453                 config_foreach check_device wifi-device
 454                 [ "$found" -gt 0 ] && continue
 455
 456                 mode_11n=""
 457                 mode_band="g"
 458                 channel="5"
 459                 ht_cap=0
 460                 for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
 461                         ht_cap="$(($ht_cap | $cap))"
 462                 done
 463                 ht_capab="";
 464                 [ "$ht_cap" -gt 0 ] && {
 465                         mode_11n="n"
 466                         append ht_capab "       option htmode   HT20" "$N"
 467
 468                         list="  list ht_capab"
 469                         [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list  LDPC" "$N"
 470                         [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list        SHORT-GI-20" "$N"
 471                         [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list        SHORT-GI-40" "$N"
 472                         [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list    DSSS_CCK-40" "$N"
 473                 }
 474                 iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
 475
 476                 cat <<EOF
 477 config wifi-device  radio$devidx
 478         option type     mac80211
 479         option channel  ${channel}
 480         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 481         option hwmode   11${mode_11n}${mode_band}
 482 $ht_capab
 483         # REMOVE THIS LINE TO ENABLE WIFI:
 484         option disabled 1
 485
 486 config wifi-iface
 487         option device   radio$devidx
 488         option network  lan
 489         option mode     ap
 490         option ssid     OpenWrt
 491         option encryption none
 492
 493 EOF
 494         devidx=$(($devidx + 1))
 495         done
 496 }
 497