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