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 "$device" channel
  16         config_get beacon_int "$device" beacon_int
  17         config_get basic_rate_list "$device" basic_rate
  18         config_get_bool noscan "$device" noscan
  19         [ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
  20         [ "$channel" = auto ] && channel=
  21         [ -n "$hwmode" ] && {
  22                 config_get hwmode_11n "$device" hwmode_11n
  23                 [ -n "$hwmode_11n" ] && {
  24                         hwmode="$hwmode_11n"
  25                         append base_cfg "ieee80211n=1" "$N"
  26                         config_get htmode "$device" htmode
  27                         config_get ht_capab_list "$device" ht_capab
  28                         case "$htmode" in
  29                                 HT20|HT40+|HT40-) ht_capab="[$htmode]";;
  30                                 *)ht_capab=;;
  31                         esac
  32                         for cap in $ht_capab_list; do
  33                                 ht_capab="$ht_capab[$cap]"
  34                         done
  35                         [ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
  36                 }
  37         }
  38
  39         local country_ie=0
  40         [ -n "$country" ] && country_ie=1
  41         config_get_bool country_ie "$device" country_ie "$country_ie"
  42         [ "$country_ie" -gt 0 ] && append base_cfg "ieee80211d=1" "$N"
  43
  44         config_get macfilter "$vif" macfilter
  45         case "$macfilter" in
  46                 allow)
  47                         append base_cfg "macaddr_acl=1" "$N"
  48                         append base_cfg "accept_mac_file=$macfile" "$N"
  49                         ;;
  50                 deny)
  51                         append base_cfg "macaddr_acl=0" "$N"
  52                         append base_cfg "deny_mac_file=$macfile" "$N"
  53                         ;;
  54         esac
  55         config_get maclist "$vif" maclist
  56         [ -n "$maclist" ] && {
  57                 for mac in $maclist; do
  58                         echo "$mac" >> $macfile
  59                 done
  60         }
  61
  62         local br brval brstr
  63         [ -n "$basic_rate_list" ] && {
  64                 for br in $basic_rate_list; do
  65                         brval="$(($br / 100))"
  66                         [ -n "$brstr" ] && brstr="$brstr "
  67                         brstr="$brstr$brval"
  68                 done
  69         }
  70
  71         cat >> "$cfgfile" <<EOF
  72 ctrl_interface=/var/run/hostapd-$phy
  73 driver=nl80211
  74 wmm_ac_bk_cwmin=4
  75 wmm_ac_bk_cwmax=10
  76 wmm_ac_bk_aifs=7
  77 wmm_ac_bk_txop_limit=0
  78 wmm_ac_bk_acm=0
  79 wmm_ac_be_aifs=3
  80 wmm_ac_be_cwmin=4
  81 wmm_ac_be_cwmax=10
  82 wmm_ac_be_txop_limit=0
  83 wmm_ac_be_acm=0
  84 wmm_ac_vi_aifs=2
  85 wmm_ac_vi_cwmin=3
  86 wmm_ac_vi_cwmax=4
  87 wmm_ac_vi_txop_limit=94
  88 wmm_ac_vi_acm=0
  89 wmm_ac_vo_aifs=2
  90 wmm_ac_vo_cwmin=2
  91 wmm_ac_vo_cwmax=3
  92 wmm_ac_vo_txop_limit=47
  93 wmm_ac_vo_acm=0
  94 tx_queue_data3_aifs=7
  95 tx_queue_data3_cwmin=15
  96 tx_queue_data3_cwmax=1023
  97 tx_queue_data3_burst=0
  98 tx_queue_data2_aifs=3
  99 tx_queue_data2_cwmin=15
 100 tx_queue_data2_cwmax=63
 101 tx_queue_data2_burst=0
 102 tx_queue_data1_aifs=1
 103 tx_queue_data1_cwmin=7
 104 tx_queue_data1_cwmax=15
 105 tx_queue_data1_burst=3.0
 106 tx_queue_data0_aifs=1
 107 tx_queue_data0_cwmin=3
 108 tx_queue_data0_cwmax=7
 109 tx_queue_data0_burst=1.5
 110 ${hwmode:+hw_mode=$hwmode}
 111 ${channel:+channel=$channel}
 112 ${beacon_int:+beacon_int=$beacon_int}
 113 ${country:+country_code=$country}
 114 ${noscan:+noscan=$noscan}
 115 ${brstr:+basic_rates=$brstr}
 116 $base_cfg
 117
 118 EOF
 119 }
 120
 121 mac80211_hostapd_setup_bss() {
 122         local phy="$1"
 123         local vif="$2"
 124
 125         hostapd_cfg=
 126         cfgfile="/var/run/hostapd-$phy.conf"
 127         config_get ifname "$vif" ifname
 128
 129         if [ -f "$cfgfile" ]; then
 130                 append hostapd_cfg "bss=$ifname" "$N"
 131         else
 132                 mac80211_hostapd_setup_base "$phy" "$ifname"
 133                 append hostapd_cfg "interface=$ifname" "$N"
 134         fi
 135
 136         local net_cfg bridge
 137         net_cfg="$(find_net_config "$vif")"
 138         [ -z "$net_cfg" ] || bridge="$(bridge_interface "$net_cfg")"
 139         config_set "$vif" bridge "$bridge"
 140
 141         hostapd_set_bss_options hostapd_cfg "$vif"
 142
 143         config_get_bool wds "$vif" wds 0
 144         [ "$wds" -gt 0 ] && append hostapd_cfg "wds_sta=1" "$N"
 145
 146         local macaddr hidden maxassoc wmm
 147         config_get macaddr "$vif" macaddr
 148         config_get maxassoc "$vif" maxassoc
 149         config_get dtim_period "$vif" dtim_period
 150         config_get max_listen_int "$vif" max_listen_int
 151         config_get_bool hidden "$vif" hidden 0
 152         config_get_bool wmm "$vif" wmm 1
 153         cat >> /var/run/hostapd-$phy.conf <<EOF
 154 $hostapd_cfg
 155 wmm_enabled=$wmm
 156 bssid=$macaddr
 157 ignore_broadcast_ssid=$hidden
 158 ${dtim_period:+dtim_period=$dtim_period}
 159 ${max_listen_int:+max_listen_interval=$max_listen_int}
 160 ${maxassoc:+max_num_sta=$maxassoc}
 161 EOF
 162 }
 163
 164 mac80211_start_vif() {
 165         local vif="$1"
 166         local ifname="$2"
 167
 168         local net_cfg
 169         net_cfg="$(find_net_config "$vif")"
 170         [ -z "$net_cfg" ] || start_net "$ifname" "$net_cfg"
 171
 172         set_wifi_up "$vif" "$ifname"
 173 }
 174
 175 find_mac80211_phy() {
 176         local device="$1"
 177
 178         local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
 179         config_get phy "$device" phy
 180         [ -z "$phy" -a -n "$macaddr" ] && {
 181                 for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
 182                         [ "$macaddr" = "$(cat /sys/class/ieee80211/${phy}/macaddress)" ] || continue
 183                         config_set "$device" phy "$phy"
 184                         break
 185                 done
 186                 config_get phy "$device" phy
 187         }
 188         [ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
 189                 echo "PHY for wifi device $1 not found"
 190                 return 1
 191         }
 192         [ -z "$macaddr" ] && {
 193                 config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
 194         }
 195         return 0
 196 }
 197
 198 scan_mac80211() {
 199         local device="$1"
 200         local adhoc sta ap monitor mesh
 201
 202         config_get vifs "$device" vifs
 203         for vif in $vifs; do
 204                 config_get mode "$vif" mode
 205                 case "$mode" in
 206                         adhoc|sta|ap|monitor|mesh)
 207                                 append $mode "$vif"
 208                         ;;
 209                         *) echo "$device($vif): Invalid mode, ignored."; continue;;
 210                 esac
 211         done
 212
 213         config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
 214 }
 215
 216 list_phy_interfaces() {
 217         local phy="$1"
 218         if [ -d "/sys/class/ieee80211/${phy}/device/net" ]; then
 219                 ls "/sys/class/ieee80211/${phy}/device/net" 2>/dev/null;
 220         else
 221                 ls "/sys/class/ieee80211/${phy}/device" 2>/dev/null | grep net: | sed -e 's,net:,,g'
 222         fi
 223 }
 224
 225 disable_mac80211() (
 226         local device="$1"
 227
 228         find_mac80211_phy "$device" || return 0
 229         config_get phy "$device" phy
 230
 231         set_wifi_down "$device"
 232         # kill all running hostapd and wpa_supplicant processes that
 233         # are running on atheros/mac80211 vifs
 234         for pid in `pidof hostapd`; do
 235                 grep -E "$phy" /proc/$pid/cmdline >/dev/null && \
 236                         kill $pid
 237         done
 238
 239         include /lib/network
 240         for wdev in $(list_phy_interfaces "$phy"); do
 241                 [ -f "/var/run/$wdev.pid" ] && kill $(cat /var/run/$wdev.pid) >&/dev/null 2>&1
 242                 for pid in `pidof wpa_supplicant`; do
 243                         grep "$wdev" /proc/$pid/cmdline >/dev/null && \
 244                                 kill $pid
 245                 done
 246                 ifconfig "$wdev" down 2>/dev/null
 247                 unbridge "$dev"
 248                 iw dev "$wdev" del
 249         done
 250
 251         return 0
 252 )
 253 get_freq() {
 254         local phy="$1"
 255         local chan="$2"
 256         iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
 257 }
 258 enable_mac80211() {
 259         local device="$1"
 260         config_get channel "$device" channel
 261         config_get vifs "$device" vifs
 262         config_get txpower "$device" txpower
 263         config_get country "$device" country
 264         config_get distance "$device" distance
 265         config_get txantenna "$device" txantenna all
 266         config_get rxantenna "$device" rxantenna all
 267         config_get frag "$device" frag
 268         config_get rts "$device" rts
 269         find_mac80211_phy "$device" || return 0
 270         config_get phy "$device" phy
 271         local i=0
 272         local macidx=0
 273         local apidx=0
 274         fixed=""
 275         local hostapd_ctrl=""
 276
 277         config_get ath9k_chanbw "$device" ath9k_chanbw
 278         [ -n "$ath9k_chanbw" -a -d /sys/kernel/debug/ieee80211/$phy/ath9k ] && echo "$ath9k_chanbw" > /sys/kernel/debug/ieee80211/$phy/ath9k/chanbw
 279
 280         [ -n "$country" ] && iw reg set "$country"
 281         [ "$channel" = "auto" -o "$channel" = "0" ] || {
 282                 fixed=1
 283         }
 284
 285         iw phy "$phy" set antenna $txantenna $rxantenna >/dev/null 2>&1
 286
 287         [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
 288         [ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
 289         [ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"
 290
 291         export channel fixed
 292         # convert channel to frequency
 293         local freq="$(get_freq "$phy" "${fixed:+$channel}")"
 294
 295         wifi_fixup_hwmode "$device" "g"
 296         for vif in $vifs; do
 297                 while [ -d "/sys/class/net/wlan$i" ]; do
 298                         i=$(($i + 1))
 299                 done
 300
 301                 config_get ifname "$vif" ifname
 302                 [ -n "$ifname" ] || {
 303                         ifname="wlan$i"
 304                 }
 305                 config_set "$vif" ifname "$ifname"
 306
 307                 config_get mode "$vif" mode
 308                 config_get ssid "$vif" ssid
 309
 310                 # It is far easier to delete and create the desired interface
 311                 case "$mode" in
 312                         adhoc)
 313                                 iw phy "$phy" interface add "$ifname" type adhoc
 314                         ;;
 315                         ap)
 316                                 # Hostapd will handle recreating the interface and
 317                                 # it's accompanying monitor
 318                                 apidx="$(($apidx + 1))"
 319                                 i=$(($i + 1))
 320                                 [ "$apidx" -gt 1 ] || iw phy "$phy" interface add "$ifname" type managed
 321                         ;;
 322                         mesh)
 323                                 config_get mesh_id "$vif" mesh_id
 324                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 325                         ;;
 326                         monitor)
 327                                 iw phy "$phy" interface add "$ifname" type monitor
 328                         ;;
 329                         sta)
 330                                 local wdsflag
 331                                 config_get_bool wds "$vif" wds 0
 332                                 [ "$wds" -gt 0 ] && wdsflag="4addr on"
 333                                 iw phy "$phy" interface add "$ifname" type managed $wdsflag
 334                                 config_get_bool powersave "$vif" powersave 0
 335                                 [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
 336                                 iwconfig "$ifname" power "$powersave"
 337                         ;;
 338                 esac
 339
 340                 # All interfaces must have unique mac addresses
 341                 # which can either be explicitly set in the device
 342                 # section, or automatically generated
 343                 config_get macaddr "$device" macaddr
 344                 local mac_1="${macaddr%%:*}"
 345                 local mac_2="${macaddr#*:}"
 346
 347                 config_get vif_mac "$vif" macaddr
 348                 [ -n "$vif_mac" ] || {
 349                         if [ "$macidx" -gt 0 ]; then
 350                                 offset="$(( 2 + $macidx * 4 ))"
 351                         else
 352                                 offset="0"
 353                         fi
 354                         vif_mac="$( printf %02x $((0x$mac_1 + $offset)) ):$mac_2"
 355                         macidx="$(($macidx + 1))"
 356                 }
 357                 [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
 358                 config_set "$vif" macaddr "$vif_mac"
 359
 360                 # !! ap !!
 361                 #
 362                 # ALL ap functionality will be passed to hostapd
 363                 #
 364                 # !! station !!
 365                 #
 366                 # ALL station functionality will be passed to wpa_supplicant
 367                 #
 368                 if [ ! "$mode" = "ap" ]; then
 369                         # We attempt to set the channel for all interfaces, although
 370                         # mac80211 may not support it or the driver might not yet
 371                         # for ap mode this is handled by hostapd
 372                         [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
 373                 fi
 374
 375                 config_get vif_txpower "$vif" txpower
 376                 # use vif_txpower (from wifi-iface) to override txpower (from
 377                 # wifi-device) if the latter doesn't exist
 378                 txpower="${txpower:-$vif_txpower}"
 379                 [ -z "$txpower" ] || iw dev "$ifname" set txpower fixed "${txpower%%.*}00"
 380         done
 381
 382         local start_hostapd=
 383         rm -f /var/run/hostapd-$phy.conf
 384         for vif in $vifs; do
 385                 config_get mode "$vif" mode
 386                 [ "$mode" = "ap" ] || continue
 387                 mac80211_hostapd_setup_bss "$phy" "$vif"
 388                 start_hostapd=1
 389         done
 390
 391         [ -n "$start_hostapd" ] && {
 392                 hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
 393                         echo "Failed to start hostapd for $phy"
 394                         return
 395                 }
 396                 sleep 2
 397
 398                 for vif in $vifs; do
 399                         config_get mode "$vif" mode
 400                         config_get ifname "$vif" ifname
 401                         [ "$mode" = "ap" ] || continue
 402                         hostapd_ctrl="${hostapd_ctrl:-/var/run/hostapd-$phy/$ifname}"
 403                         mac80211_start_vif "$vif" "$ifname"
 404                 done
 405         }
 406
 407         for vif in $vifs; do
 408                 config_get mode "$vif" mode
 409                 config_get ifname "$vif" ifname
 410                 [ ! "$mode" = "ap" ] || continue
 411                 ifconfig "$ifname" up
 412
 413                 if [ ! "$mode" = "ap" ]; then
 414                         ifconfig "$ifname" up
 415                         case "$mode" in
 416                                 adhoc)
 417                                         config_get bssid "$vif" bssid
 418                                         config_get ssid "$vif" ssid
 419                                         config_get beacon_int "$device" beacon_int
 420                                         config_get basic_rate_list "$device" basic_rate
 421                                         config_get encryption "$vif" encryption
 422                                         config_get key "$vif" key 1
 423                                         config_get mcast_rate "$vif" mcast_rate
 424
 425                                         local keyspec=""
 426                                         [ "$encryption" == "wep" ] && {
 427                                                 case "$key" in
 428                                                         [1234])
 429                                                                 local idx
 430                                                                 for idx in 1 2 3 4; do
 431                                                                         local ikey
 432                                                                         config_get ikey "$vif" "key$idx"
 433
 434                                                                         [ -n "$ikey" ] && {
 435                                                                                 ikey="$(($idx - 1)):$(prepare_key_wep "$ikey")"
 436                                                                                 [ $idx -eq $key ] && ikey="d:$ikey"
 437                                                                                 append keyspec "$ikey"
 438                                                                         }
 439                                                                 done
 440                                                         ;;
 441                                                         *) append keyspec "d:0:$(prepare_key_wep "$key")" ;;
 442                                                 esac
 443                                         }
 444
 445                                         local br brval brsub brstr
 446                                         [ -n "$basic_rate_list" ] && {
 447                                                 for br in $basic_rate_list; do
 448                                                         brval="$(($br / 1000))"
 449                                                         brsub="$((($br / 100) % 10))"
 450                                                         [ "$brsub" -gt 0 ] && brval="$brval.$brsub"
 451                                                         [ -n "$brstr" ] && brstr="$brstr,"
 452                                                         brstr="$brstr$brval"
 453                                                 done
 454                                         }
 455
 456                                         local mcval=""
 457                                         [ -n "$mcast_rate" ] && {
 458                                                 mcval="$(($mcast_rate / 1000))"
 459                                                 mcsub="$(( ($mcast_rate / 100) % 10 ))"
 460                                                 [ "$mcsub" -gt 0 ] && mcval="$mcval.$mcsub"
 461                                         }
 462
 463                                         config_get htmode "$device" htmode
 464                                         case "$htmode" in
 465                                                 HT20|HT40+|HT40-) ;;
 466                                                 *) htmode= ;;
 467                                         esac
 468
 469                                         iw dev "$ifname" ibss join "$ssid" $freq $htmode \
 470                                                 ${fixed:+fixed-freq} $bssid \
 471                                                 ${beacon_int:+beacon-interval $beacon_int} \
 472                                                 ${brstr:+basic-rates $brstr} \
 473                                                 ${mcval:+mcast-rate $mcval} \
 474                                                 ${keyspec:+keys $keyspec}
 475                                 ;;
 476                                 sta)
 477                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 478                                                 wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" || {
 479                                                         echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 480                                                         # make sure this wifi interface won't accidentally stay open without encryption
 481                                                         ifconfig "$ifname" down
 482                                                         continue
 483                                                 }
 484                                         fi
 485                                 ;;
 486                         esac
 487                         mac80211_start_vif "$vif" "$ifname"
 488                 fi
 489         done
 490
 491 }
 492
 493
 494 check_mac80211_device() {
 495         config_get phy "$1" phy
 496         [ -z "$phy" ] && {
 497                 find_mac80211_phy "$1" >/dev/null || return 0
 498                 config_get phy "$1" phy
 499         }
 500         [ "$phy" = "$dev" ] && found=1
 501 }
 502
 503 detect_mac80211() {
 504         devidx=0
 505         config_load wireless
 506         while :; do
 507                 config_get type "radio$devidx" type
 508                 [ -n "$type" ] || break
 509                 devidx=$(($devidx + 1))
 510         done
 511         for dev in $(ls /sys/class/ieee80211); do
 512                 found=0
 513                 config_foreach check_mac80211_device wifi-device
 514                 [ "$found" -gt 0 ] && continue
 515
 516                 mode_11n=""
 517                 mode_band="g"
 518                 channel="11"
 519                 ht_cap=0
 520                 for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
 521                         ht_cap="$(($ht_cap | $cap))"
 522                 done
 523                 ht_capab="";
 524                 [ "$ht_cap" -gt 0 ] && {
 525                         mode_11n="n"
 526                         append ht_capab "       option htmode   HT20" "$N"
 527
 528                         list="  list ht_capab"
 529                         [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list  LDPC" "$N"
 530                         [ "$(($ht_cap & 16))" -eq 16 ] && append ht_capab "$list        GF" "$N"
 531                         [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list        SHORT-GI-20" "$N"
 532                         [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list        SHORT-GI-40" "$N"
 533                         [ "$(($ht_cap & 128))" -eq 128 ] && append ht_capab "$list      TX-STBC" "$N"
 534                         [ "$(($ht_cap & 768))" -eq 256 ] && append ht_capab "$list      RX-STBC1" "$N"
 535                         [ "$(($ht_cap & 768))" -eq 512 ] && append ht_capab "$list      RX-STBC12" "$N"
 536                         [ "$(($ht_cap & 768))" -eq 768 ] && append ht_capab "$list      RX-STBC123" "$N"
 537                         [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list    DSSS_CCK-40" "$N"
 538                 }
 539                 iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
 540
 541                 cat <<EOF
 542 config wifi-device  radio$devidx
 543         option type     mac80211
 544         option channel  ${channel}
 545         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 546         option hwmode   11${mode_11n}${mode_band}
 547 $ht_capab
 548         # REMOVE THIS LINE TO ENABLE WIFI:
 549         option disabled 1
 550
 551 config wifi-iface
 552         option device   radio$devidx
 553         option network  lan
 554         option mode     ap
 555         option ssid     OpenWrt
 556         option encryption none
 557
 558 EOF
 559         devidx=$(($devidx + 1))
 560         done
 561 }
 562