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         macfile="/var/run/hostapd-$phy.maclist"
  10         [ -e "$macfile" ] && rm -f "$macfile"
  11
  12         config_get device "$vif" device
  13         config_get country "$device" country
  14         config_get hwmode "$device" hwmode
  15         config_get channel "$device" channel
  16         config_get_bool noscan "$device" noscan
  17         [ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
  18         [ "$channel" = auto ] && channel=
  19         [ -n "$hwmode" ] && {
  20                 config_get hwmode_11n "$device" hwmode_11n
  21                 [ -n "$hwmode_11n" ] && {
  22                         hwmode="$hwmode_11n"
  23                         append base_cfg "ieee80211n=1" "$N"
  24                         config_get htmode "$device" htmode
  25                         config_get ht_capab_list "$device" ht_capab
  26                         case "$htmode" in
  27                                 HT20|HT40+|HT40-) ht_capab="[$htmode]";;
  28                                 *)ht_capab=;;
  29                         esac
  30                         for cap in $ht_capab_list; do
  31                                 ht_capab="$ht_capab[$cap]"
  32                         done
  33                         [ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
  34                 }
  35         }
  36
  37         config_get macfilter "$vif" macfilter
  38         case "$macfilter" in
  39                 allow)
  40                         append base_cfg "macaddr_acl=1" "$N"
  41                         append base_cfg "accept_mac_file=$macfile" "$N"
  42                         ;;
  43                 deny)
  44                         append base_cfg "macaddr_acl=0" "$N"
  45                         append base_cfg "deny_mac_file=$macfile" "$N"
  46                         ;;
  47         esac
  48         config_get maclist "$vif" maclist
  49         [ -n "$maclist" ] && {
  50                 for mac in $maclist; do
  51                         echo "$mac" >> $macfile
  52                 done
  53         }
  54         cat >> "$cfgfile" <<EOF
  55 ctrl_interface=/var/run/hostapd-$phy
  56 driver=nl80211
  57 wmm_ac_bk_cwmin=4
  58 wmm_ac_bk_cwmax=10
  59 wmm_ac_bk_aifs=7
  60 wmm_ac_bk_txop_limit=0
  61 wmm_ac_bk_acm=0
  62 wmm_ac_be_aifs=3
  63 wmm_ac_be_cwmin=4
  64 wmm_ac_be_cwmax=10
  65 wmm_ac_be_txop_limit=0
  66 wmm_ac_be_acm=0
  67 wmm_ac_vi_aifs=2
  68 wmm_ac_vi_cwmin=3
  69 wmm_ac_vi_cwmax=4
  70 wmm_ac_vi_txop_limit=94
  71 wmm_ac_vi_acm=0
  72 wmm_ac_vo_aifs=2
  73 wmm_ac_vo_cwmin=2
  74 wmm_ac_vo_cwmax=3
  75 wmm_ac_vo_txop_limit=47
  76 wmm_ac_vo_acm=0
  77 tx_queue_data3_aifs=7
  78 tx_queue_data3_cwmin=15
  79 tx_queue_data3_cwmax=1023
  80 tx_queue_data3_burst=0
  81 tx_queue_data2_aifs=3
  82 tx_queue_data2_cwmin=15
  83 tx_queue_data2_cwmax=63
  84 tx_queue_data2_burst=0
  85 tx_queue_data1_aifs=1
  86 tx_queue_data1_cwmin=7
  87 tx_queue_data1_cwmax=15
  88 tx_queue_data1_burst=3.0
  89 tx_queue_data0_aifs=1
  90 tx_queue_data0_cwmin=3
  91 tx_queue_data0_cwmax=7
  92 tx_queue_data0_burst=1.5
  93 ${hwmode:+hw_mode=$hwmode}
  94 ${channel:+channel=$channel}
  95 ${country:+country_code=$country}
  96 ${noscan:+noscan=$noscan}
  97 $base_cfg
  98
  99 EOF
 100 }
 101
 102 mac80211_hostapd_setup_bss() {
 103         local phy="$1"
 104         local vif="$2"
 105
 106         hostapd_cfg=
 107         cfgfile="/var/run/hostapd-$phy.conf"
 108         config_get ifname "$vif" ifname
 109
 110         if [ -f "$cfgfile" ]; then
 111                 append hostapd_cfg "bss=$ifname" "$N"
 112         else
 113                 mac80211_hostapd_setup_base "$phy" "$ifname"
 114                 append hostapd_cfg "interface=$ifname" "$N"
 115         fi
 116
 117         local net_cfg bridge
 118         net_cfg="$(find_net_config "$vif")"
 119         [ -z "$net_cfg" ] || bridge="$(bridge_interface "$net_cfg")"
 120         config_set "$vif" bridge "$bridge"
 121
 122         hostapd_set_bss_options hostapd_cfg "$vif"
 123
 124         config_get_bool wds "$vif" wds 0
 125         [ "$wds" -gt 0 ] && append hostapd_cfg "wds_sta=1" "$N"
 126
 127         local macaddr hidden maxassoc wmm
 128         config_get macaddr "$vif" macaddr
 129         config_get maxassoc "$vif" maxassoc
 130         config_get_bool hidden "$vif" hidden 0
 131         config_get_bool wmm "$vif" wmm 1
 132         cat >> /var/run/hostapd-$phy.conf <<EOF
 133 $hostapd_cfg
 134 wmm_enabled=$wmm
 135 bssid=$macaddr
 136 ignore_broadcast_ssid=$hidden
 137 ${maxassoc:+max_num_sta=$maxassoc}
 138 EOF
 139 }
 140
 141 mac80211_start_vif() {
 142         local vif="$1"
 143         local ifname="$2"
 144
 145         local net_cfg
 146         net_cfg="$(find_net_config "$vif")"
 147         [ -z "$net_cfg" ] || start_net "$ifname" "$net_cfg"
 148
 149         set_wifi_up "$vif" "$ifname"
 150 }
 151
 152 find_mac80211_phy() {
 153         local device="$1"
 154
 155         local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
 156         config_get phy "$device" phy
 157         [ -z "$phy" -a -n "$macaddr" ] && {
 158                 for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
 159                         [ "$macaddr" = "$(cat /sys/class/ieee80211/${phy}/macaddress)" ] || continue
 160                         config_set "$device" phy "$phy"
 161                         break
 162                 done
 163                 config_get phy "$device" phy
 164         }
 165         [ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
 166                 echo "PHY for wifi device $1 not found"
 167                 return 1
 168         }
 169         [ -z "$macaddr" ] && {
 170                 config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
 171         }
 172         return 0
 173 }
 174
 175 scan_mac80211() {
 176         local device="$1"
 177         local adhoc sta ap monitor mesh
 178
 179         config_get vifs "$device" vifs
 180         for vif in $vifs; do
 181                 config_get mode "$vif" mode
 182                 case "$mode" in
 183                         adhoc|sta|ap|monitor|mesh)
 184                                 append $mode "$vif"
 185                         ;;
 186                         *) echo "$device($vif): Invalid mode, ignored."; continue;;
 187                 esac
 188         done
 189
 190         config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
 191 }
 192
 193 list_phy_interfaces() {
 194         local phy="$1"
 195         if [ -d "/sys/class/ieee80211/${phy}/device/net" ]; then
 196                 ls "/sys/class/ieee80211/${phy}/device/net" 2>/dev/null;
 197         else
 198                 ls "/sys/class/ieee80211/${phy}/device" 2>/dev/null | grep net: | sed -e 's,net:,,g'
 199         fi
 200 }
 201
 202 disable_mac80211() (
 203         local device="$1"
 204
 205         find_mac80211_phy "$device" || return 0
 206         config_get phy "$device" phy
 207
 208         set_wifi_down "$device"
 209         # kill all running hostapd and wpa_supplicant processes that
 210         # are running on atheros/mac80211 vifs
 211         for pid in `pidof hostapd`; do
 212                 grep -E "$phy" /proc/$pid/cmdline >/dev/null && \
 213                         kill $pid
 214         done
 215
 216         include /lib/network
 217         for wdev in $(list_phy_interfaces "$phy"); do
 218                 [ -f "/var/run/$wdev.pid" ] && kill $(cat /var/run/$wdev.pid) >&/dev/null 2>&1
 219                 for pid in `pidof wpa_supplicant`; do
 220                         grep "$wdev" /proc/$pid/cmdline >/dev/null && \
 221                                 kill $pid
 222                 done
 223                 ifconfig "$wdev" down 2>/dev/null
 224                 unbridge "$dev"
 225                 iw dev "$wdev" del
 226         done
 227
 228         return 0
 229 )
 230 get_freq() {
 231         local phy="$1"
 232         local chan="$2"
 233         iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
 234 }
 235 enable_mac80211() {
 236         local device="$1"
 237         config_get channel "$device" channel
 238         config_get vifs "$device" vifs
 239         config_get txpower "$device" txpower
 240         config_get country "$device" country
 241         config_get distance "$device" distance
 242         config_get txantenna "$device" txantenna
 243         config_get rxantenna "$device" rxantenna
 244         config_get frag "$device" frag
 245         config_get rts "$device" rts
 246         find_mac80211_phy "$device" || return 0
 247         config_get phy "$device" phy
 248         local i=0
 249         local macidx=0
 250         local apidx=0
 251         fixed=""
 252         local hostapd_ctrl=""
 253
 254         [ -n "$country" ] && iw reg set "$country"
 255         [ "$channel" = "auto" -o "$channel" = "0" ] || {
 256                 fixed=1
 257         }
 258
 259         local antspec="${txantenna:+$txantenna }$rxantenna"
 260         iw phy "$phy" set antenna ${antspec:-all}
 261
 262         [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
 263         [ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
 264         [ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"
 265
 266         export channel fixed
 267         # convert channel to frequency
 268         local freq="$(get_freq "$phy" "${fixed:+$channel}")"
 269
 270         wifi_fixup_hwmode "$device" "g"
 271         for vif in $vifs; do
 272                 while [ -d "/sys/class/net/wlan$i" ]; do
 273                         i=$(($i + 1))
 274                 done
 275
 276                 config_get ifname "$vif" ifname
 277                 [ -n "$ifname" ] || {
 278                         ifname="wlan$i"
 279                 }
 280                 config_set "$vif" ifname "$ifname"
 281
 282                 config_get mode "$vif" mode
 283                 config_get ssid "$vif" ssid
 284
 285                 # It is far easier to delete and create the desired interface
 286                 case "$mode" in
 287                         adhoc)
 288                                 iw phy "$phy" interface add "$ifname" type adhoc
 289                         ;;
 290                         ap)
 291                                 # Hostapd will handle recreating the interface and
 292                                 # it's accompanying monitor
 293                                 apidx="$(($apidx + 1))"
 294                                 i=$(($i + 1))
 295                                 [ "$apidx" -gt 1 ] || iw phy "$phy" interface add "$ifname" type managed
 296                         ;;
 297                         mesh)
 298                                 config_get mesh_id "$vif" mesh_id
 299                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 300                         ;;
 301                         monitor)
 302                                 iw phy "$phy" interface add "$ifname" type monitor
 303                         ;;
 304                         sta)
 305                                 local wdsflag
 306                                 config_get_bool wds "$vif" wds 0
 307                                 [ "$wds" -gt 0 ] && wdsflag="4addr on"
 308                                 iw phy "$phy" interface add "$ifname" type managed $wdsflag
 309                                 config_get_bool powersave "$vif" powersave 0
 310                                 [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
 311                                 iwconfig "$ifname" power "$powersave"
 312                         ;;
 313                 esac
 314
 315                 # All interfaces must have unique mac addresses
 316                 # which can either be explicitly set in the device
 317                 # section, or automatically generated
 318                 config_get macaddr "$device" macaddr
 319                 local mac_1="${macaddr%%:*}"
 320                 local mac_2="${macaddr#*:}"
 321
 322                 config_get vif_mac "$vif" macaddr
 323                 [ -n "$vif_mac" ] || {
 324                         if [ "$macidx" -gt 0 ]; then
 325                                 offset="$(( 2 + $macidx * 4 ))"
 326                         else
 327                                 offset="0"
 328                         fi
 329                         vif_mac="$( printf %02x $((0x$mac_1 + $offset)) ):$mac_2"
 330                         macidx="$(($macidx + 1))"
 331                 }
 332                 [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
 333                 config_set "$vif" macaddr "$vif_mac"
 334
 335                 # !! ap !!
 336                 #
 337                 # ALL ap functionality will be passed to hostapd
 338                 #
 339                 # !! station !!
 340                 #
 341                 # ALL station functionality will be passed to wpa_supplicant
 342                 #
 343                 if [ ! "$mode" = "ap" ]; then
 344                         # We attempt to set the channel for all interfaces, although
 345                         # mac80211 may not support it or the driver might not yet
 346                         # for ap mode this is handled by hostapd
 347                         [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
 348                 fi
 349
 350                 config_get vif_txpower "$vif" txpower
 351                 # use vif_txpower (from wifi-iface) to override txpower (from
 352                 # wifi-device) if the latter doesn't exist
 353                 txpower="${txpower:-$vif_txpower}"
 354                 [ -z "$txpower" ] || iw dev "$ifname" set txpower fixed "${txpower%%.*}00"
 355         done
 356
 357         local start_hostapd=
 358         rm -f /var/run/hostapd-$phy.conf
 359         for vif in $vifs; do
 360                 config_get mode "$vif" mode
 361                 [ "$mode" = "ap" ] || continue
 362                 mac80211_hostapd_setup_bss "$phy" "$vif"
 363                 start_hostapd=1
 364         done
 365
 366         [ -n "$start_hostapd" ] && {
 367                 hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
 368                         echo "Failed to start hostapd for $phy"
 369                         return
 370                 }
 371                 sleep 2
 372
 373                 for vif in $vifs; do
 374                         config_get mode "$vif" mode
 375                         config_get ifname "$vif" ifname
 376                         [ "$mode" = "ap" ] || continue
 377                         hostapd_ctrl="${hostapd_ctrl:-/var/run/hostapd-$phy/$ifname}"
 378                         mac80211_start_vif "$vif" "$ifname"
 379                 done
 380         }
 381
 382         for vif in $vifs; do
 383                 config_get mode "$vif" mode
 384                 config_get ifname "$vif" ifname
 385                 [ ! "$mode" = "ap" ] || continue
 386                 ifconfig "$ifname" up
 387
 388                 if [ ! "$mode" = "ap" ]; then
 389                         ifconfig "$ifname" up
 390                         case "$mode" in
 391                                 adhoc)
 392                                         config_get bssid "$vif" bssid
 393                                         config_get ssid "$vif" ssid
 394                                         config_get bintval "$vif" bintval
 395                                         config_get basicrates "$vif" basicrates
 396                                         config_get encryption "$vif" encryption
 397                                         config_get key "$vif" key 1
 398                                         config_get mcast_rate "$vif" mcast_rate
 399
 400                                         local keyspec=""
 401                                         [ "$encryption" == "wep" ] && {
 402                                                 case "$key" in
 403                                                         [1234])
 404                                                                 local idx
 405                                                                 for idx in 1 2 3 4; do
 406                                                                         local ikey
 407                                                                         config_get ikey "$vif" "key$idx"
 408
 409                                                                         [ -n "$ikey" ] && {
 410                                                                                 ikey="$(($idx - 1)):$(prepare_key_wep "$ikey")"
 411                                                                                 [ $idx -eq $key ] && ikey="d:$ikey"
 412                                                                                 append keyspec "$ikey"
 413                                                                         }
 414                                                                 done
 415                                                         ;;
 416                                                         *) append keyspec "d:0:$(prepare_key_wep "$key")" ;;
 417                                                 esac
 418                                         }
 419
 420                                         local mcval=""
 421                                         [ -n "$mcast_rate" ] && {
 422                                                 mcval="$(($mcast_rate / 1000))"
 423                                                 mcsub="$(( ($mcast_rate / 100) % 10 ))"
 424                                                 [ "$mcsub" -gt 0 ] && mcval="$mcval.$mcsub"
 425                                         }
 426
 427                                         iw dev "$ifname" ibss join "$ssid" $freq \
 428                                                 ${fixed:+fixed-freq} $bssid \
 429                                                 ${mcval:+mcast-rate $mcval} \
 430                                                 ${bintval:+beacon-interval $bintval} \
 431                                                 ${basicrates:+basic-rates $basicrates} \
 432                                                 ${keyspec:+keys $keyspec}
 433                                 ;;
 434                                 sta)
 435                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 436                                                 wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" || {
 437                                                         echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 438                                                         # make sure this wifi interface won't accidentally stay open without encryption
 439                                                         ifconfig "$ifname" down
 440                                                         continue
 441                                                 }
 442                                         fi
 443                                 ;;
 444                         esac
 445                         mac80211_start_vif "$vif" "$ifname"
 446                 fi
 447         done
 448
 449 }
 450
 451
 452 check_device() {
 453         config_get phy "$1" phy
 454         [ -z "$phy" ] && {
 455                 find_mac80211_phy "$1" >/dev/null || return 0
 456                 config_get phy "$1" phy
 457         }
 458         [ "$phy" = "$dev" ] && found=1
 459 }
 460
 461 detect_mac80211() {
 462         devidx=0
 463         config_load wireless
 464         while :; do
 465                 config_get type "radio$devidx" type
 466                 [ -n "$type" ] || break
 467                 devidx=$(($devidx + 1))
 468         done
 469         for dev in $(ls /sys/class/ieee80211); do
 470                 found=0
 471                 config_foreach check_device wifi-device
 472                 [ "$found" -gt 0 ] && continue
 473
 474                 mode_11n=""
 475                 mode_band="g"
 476                 channel="11"
 477                 ht_cap=0
 478                 for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
 479                         ht_cap="$(($ht_cap | $cap))"
 480                 done
 481                 ht_capab="";
 482                 [ "$ht_cap" -gt 0 ] && {
 483                         mode_11n="n"
 484                         append ht_capab "       option htmode   HT20" "$N"
 485
 486                         list="  list ht_capab"
 487                         [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list  LDPC" "$N"
 488                         [ "$(($ht_cap & 16))" -eq 16 ] && append ht_capab "$list        GF" "$N"
 489                         [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list        SHORT-GI-20" "$N"
 490                         [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list        SHORT-GI-40" "$N"
 491                         [ "$(($ht_cap & 128))" -eq 128 ] && append ht_capab "$list      TX-STBC" "$N"
 492                         [ "$(($ht_cap & 768))" -eq 256 ] && append ht_capab "$list      RX-STBC1" "$N"
 493                         [ "$(($ht_cap & 768))" -eq 512 ] && append ht_capab "$list      RX-STBC12" "$N"
 494                         [ "$(($ht_cap & 768))" -eq 768 ] && append ht_capab "$list      RX-STBC123" "$N"
 495                         [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list    DSSS_CCK-40" "$N"
 496                 }
 497                 iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
 498
 499                 cat <<EOF
 500 config wifi-device  radio$devidx
 501         option type     mac80211
 502         option channel  ${channel}
 503         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 504         option hwmode   11${mode_11n}${mode_band}
 505 $ht_capab
 506         # REMOVE THIS LINE TO ENABLE WIFI:
 507         option disabled 1
 508
 509 config wifi-iface
 510         option device   radio$devidx
 511         option network  lan
 512         option mode     ap
 513         option ssid     OpenWrt
 514         option encryption none
 515
 516 EOF
 517         devidx=$(($devidx + 1))
 518         done
 519 }
 520