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 wpa_supplicant`; do
 177                 grep -E "($phy|wlan)" /proc/$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                 ifconfig "$wdev" down 2>/dev/null
 185                 unbridge "$dev"
 186                 iw dev "$wdev" del
 187         done
 188
 189         return 0
 190 )
 191 get_freq() {
 192         local phy="$1"
 193         local chan="$2"
 194         iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
 195 }
 196 enable_mac80211() {
 197         local device="$1"
 198         config_get channel "$device" channel
 199         config_get vifs "$device" vifs
 200         config_get txpower "$device" txpower
 201         config_get country "$device" country
 202         config_get distance "$device" distance
 203         find_mac80211_phy "$device" || return 0
 204         config_get phy "$device" phy
 205         local i=0
 206         local macidx=0
 207         local apidx=0
 208         fixed=""
 209
 210         [ -n "$country" ] && iw reg set "$country"
 211         [ "$channel" = "auto" -o "$channel" = "0" ] || {
 212                 fixed=1
 213         }
 214
 215         [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
 216
 217         export channel fixed
 218         # convert channel to frequency
 219         local freq="$(get_freq "$phy" "${fixed:+$channel}")"
 220
 221         wifi_fixup_hwmode "$device" "g"
 222         for vif in $vifs; do
 223                 while [ -d "/sys/class/net/wlan$i" ]; do
 224                         i=$(($i + 1))
 225                 done
 226
 227                 config_get ifname "$vif" ifname
 228                 [ -n "$ifname" ] || {
 229                         ifname="wlan$i"
 230                 }
 231                 config_set "$vif" ifname "$ifname"
 232
 233                 config_get enc "$vif" encryption
 234                 config_get mode "$vif" mode
 235                 config_get ssid "$vif" ssid
 236
 237                 # It is far easier to delete and create the desired interface
 238                 case "$mode" in
 239                         adhoc)
 240                                 iw phy "$phy" interface add "$ifname" type adhoc
 241                         ;;
 242                         ap)
 243                                 # Hostapd will handle recreating the interface and
 244                                 # it's accompanying monitor
 245                                 apidx="$(($apidx + 1))"
 246                                 [ "$apidx" -gt 1 ] || iw phy "$phy" interface add "$ifname" type managed
 247                         ;;
 248                         mesh)
 249                                 config_get mesh_id "$vif" mesh_id
 250                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 251                         ;;
 252                         monitor)
 253                                 iw phy "$phy" interface add "$ifname" type monitor
 254                         ;;
 255                         sta)
 256                                 local wdsflag
 257                                 config_get_bool wds "$vif" wds 0
 258                                 [ "$wds" -gt 0 ] && wdsflag="4addr on"
 259                                 iw phy "$phy" interface add "$ifname" type managed $wdsflag
 260                                 config_get_bool powersave "$vif" powersave 0
 261                                 [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
 262                                 iwconfig "$ifname" power "$powersave"
 263                         ;;
 264                 esac
 265
 266                 # All interfaces must have unique mac addresses
 267                 # which can either be explicitly set in the device
 268                 # section, or automatically generated
 269                 config_get macaddr "$device" macaddr
 270                 local mac_1="${macaddr%%:*}"
 271                 local mac_2="${macaddr#*:}"
 272
 273                 config_get vif_mac "$vif" macaddr
 274                 [ -n "$vif_mac" ] || {
 275                         if [ "$macidx" -gt 0 ]; then
 276                                 offset="$(( 2 + $macidx * 4 ))"
 277                         else
 278                                 offset="0"
 279                         fi
 280                         vif_mac="$( printf %02x $((0x$mac_1 + $offset)) ):$mac_2"
 281                         macidx="$(($macidx + 1))"
 282                 }
 283                 [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
 284                 config_set "$vif" macaddr "$vif_mac"
 285
 286                 # Valid values are:
 287                 # wpa / wep / none
 288                 #
 289                 # !! ap !!
 290                 #
 291                 # ALL ap functionality will be passed to hostapd
 292                 #
 293                 # !! mesh / adhoc / station !!
 294                 # none -> NO encryption
 295                 #
 296                 # wep + keymgmt = '' -> we use iw to connect to the
 297                 # network.
 298                 #
 299                 # wep + keymgmt = 'NONE' -> wpa_supplicant will be
 300                 # configured to handle the wep connection
 301                 if [ ! "$mode" = "ap" ]; then
 302                         # We attempt to set the channel for all interfaces, although
 303                         # mac80211 may not support it or the driver might not yet
 304                         # for ap mode this is handled by hostapd
 305                         [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
 306
 307                         local key keystring
 308
 309                         case "$enc" in
 310                                 *wep*)
 311                                         config_get keymgmt "$vif" keymgmt
 312                                         if [ -z "$keymgmt" ]; then
 313                                                 config_get key "$vif" key
 314                                                 key="${key:-1}"
 315                                                 case "$key" in
 316                                                         [1234])
 317                                                                 for idx in 1 2 3 4; do
 318                                                                         local zidx
 319                                                                         zidx=$(($idx - 1))
 320                                                                         config_get ckey "$vif" "key${idx}"
 321                                                                         if [ -n "$ckey" ]; then
 322                                                                                 [ $idx -eq $key ] && zidx="d:${zidx}"
 323                                                                                 append keystring "${zidx}:$(prepare_key_wep "$ckey")"
 324                                                                         fi
 325                                                                 done
 326                                                                 ;;
 327                                                         *)
 328                                                                 keystring="d:0:$(prepare_key_wep "$key")"
 329                                                                 ;;
 330                                                 esac
 331                                         fi
 332                                 ;;
 333                                 *psk*|*wpa*)
 334                                         config_get key "$vif" key
 335                                 ;;
 336                         esac
 337                 fi
 338
 339                 # txpower is not yet implemented in iw
 340                 config_get vif_txpower "$vif" txpower
 341                 # use vif_txpower (from wifi-iface) to override txpower (from
 342                 # wifi-device) if the latter doesn't exist
 343                 txpower="${txpower:-$vif_txpower}"
 344                 [ -z "$txpower" ] || iwconfig "$ifname" txpower "${txpower%%.*}"
 345
 346                 config_get frag "$vif" frag
 347                 if [ -n "$frag" ]; then
 348                         iw phy "$phy" set frag "${frag%%.*}"
 349                 fi
 350
 351                 config_get rts "$vif" rts
 352                 if [ -n "$rts" ]; then
 353                         iw phy "$phy" set rts "${rts%%.*}"
 354                 fi
 355
 356                 ifconfig "$ifname" up
 357
 358                 [ "$mode" = "ap" ] || mac80211_start_vif "$vif" "$ifname"
 359
 360                 case "$mode" in
 361                         adhoc)
 362                                 config_get bssid "$vif" bssid
 363                                 iw dev "$ifname" ibss join "$ssid" $freq ${fixed:+fixed-freq} $bssid
 364                         ;;
 365                         sta|mesh)
 366                                 config_get bssid "$vif" bssid
 367                                 case "$enc" in
 368                                         *wep*)
 369                                                 if [ -z "$keymgmt" ]; then
 370                                                         [ -n "$keystring" ] &&
 371                                                                 iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid key $keystring
 372                                                 else
 373                                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 374                                                                 wpa_supplicant_setup_vif "$vif" wext || {
 375                                                                         echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 376                                                                         # make sure this wifi interface won't accidentally stay open without encryption
 377                                                                         ifconfig "$ifname" down
 378                                                                         continue
 379                                                                 }
 380                                                         fi
 381                                                 fi
 382                                         ;;
 383                                         *wpa*|*psk*)
 384                                                 config_get key "$vif" key
 385                                                 if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 386                                                         wpa_supplicant_setup_vif "$vif" wext || {
 387                                                                 echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 388                                                                 # make sure this wifi interface won't accidentally stay open without encryption
 389                                                                 ifconfig "$ifname" down
 390                                                                 continue
 391                                                         }
 392                                                 fi
 393                                         ;;
 394                                         *)
 395                                                 iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid
 396                                         ;;
 397                                 esac
 398
 399                         ;;
 400                 esac
 401         done
 402
 403         local start_hostapd=
 404         rm -f /var/run/hostapd-$phy.conf
 405         for vif in $vifs; do
 406                 config_get mode "$vif" mode
 407                 [ "$mode" = "ap" ] || continue
 408                 mac80211_hostapd_setup_bss "$phy" "$vif"
 409                 start_hostapd=1
 410         done
 411
 412         [ -n "$start_hostapd" ] || return 0
 413
 414         hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
 415                 echo "Failed to start hostapd for $phy"
 416                 return
 417         }
 418         sleep 2
 419
 420         for vif in $vifs; do
 421                 config_get mode "$vif" mode
 422                 config_get ifname "$vif" ifname
 423                 [ "$mode" = "ap" ] || continue
 424                 mac80211_start_vif "$vif" "$ifname"
 425         done
 426 }
 427
 428
 429 check_device() {
 430         config_get phy "$1" phy
 431         [ -z "$phy" ] && {
 432                 find_mac80211_phy "$1" >/dev/null || return 0
 433                 config_get phy "$1" phy
 434         }
 435         [ "$phy" = "$dev" ] && found=1
 436 }
 437
 438 detect_mac80211() {
 439         devidx=0
 440         config_load wireless
 441         while :; do
 442                 config_get type "radio$devidx" type
 443                 [ -n "$type" ] || break
 444                 devidx=$(($devidx + 1))
 445         done
 446         for dev in $(ls /sys/class/ieee80211); do
 447                 found=0
 448                 config_foreach check_device wifi-device
 449                 [ "$found" -gt 0 ] && continue
 450
 451                 mode_11n=""
 452                 mode_band="g"
 453                 channel="5"
 454                 ht_cap=0
 455                 for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
 456                         ht_cap="$(($ht_cap | $cap))"
 457                 done
 458                 ht_capab="";
 459                 [ "$ht_cap" -gt 0 ] && {
 460                         mode_11n="n"
 461                         append ht_capab "       option htmode   HT20" "$N"
 462
 463                         list="  list ht_capab"
 464                         [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list  LDPC" "$N"
 465                         [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list        SHORT-GI-20" "$N"
 466                         [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list        SHORT-GI-40" "$N"
 467                         [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list    DSSS_CCK-40" "$N"
 468                 }
 469                 iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
 470
 471                 cat <<EOF
 472 config wifi-device  radio$devidx
 473         option type     mac80211
 474         option channel  ${channel}
 475         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 476         option hwmode   11${mode_11n}${mode_band}
 477 $ht_capab
 478         # REMOVE THIS LINE TO ENABLE WIFI:
 479         option disabled 1
 480
 481 config wifi-iface
 482         option device   radio$devidx
 483         option network  lan
 484         option mode     ap
 485         option ssid     OpenWrt
 486         option encryption none
 487
 488 EOF
 489         devidx=$(($devidx + 1))
 490         done
 491 }
 492