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