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 "$device"
  20
  21         [ "$channel" = auto ] && {
  22                 channel=$(iw phy "$phy" info | \
  23                         sed -ne '/MHz/ { /disabled\|passive\|radar/d; s/.*\[//; s/\].*//; p; q }')
  24                 config_set "$device" channel "$channel"
  25         }
  26
  27         [ -n "$hwmode" ] && {
  28                 config_get hwmode_11n "$device" hwmode_11n
  29                 [ -n "$hwmode_11n" ] && {
  30                         hwmode="$hwmode_11n"
  31                         append base_cfg "ieee80211n=1" "$N"
  32                         config_get htmode "$device" htmode
  33                         config_get ht_capab_list "$device" ht_capab
  34                         case "$htmode" in
  35                                 HT20|HT40+|HT40-) ht_capab="[$htmode]";;
  36                                 *)ht_capab=;;
  37                         esac
  38                         for cap in $ht_capab_list; do
  39                                 ht_capab="$ht_capab[$cap]"
  40                         done
  41                         [ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
  42                 }
  43         }
  44
  45         local country_ie=0
  46         [ -n "$country" ] && country_ie=1
  47         config_get_bool country_ie "$device" country_ie "$country_ie"
  48         [ "$country_ie" -gt 0 ] && append base_cfg "ieee80211d=1" "$N"
  49
  50         config_get macfilter "$vif" macfilter
  51         case "$macfilter" in
  52                 allow)
  53                         append base_cfg "macaddr_acl=1" "$N"
  54                         append base_cfg "accept_mac_file=$macfile" "$N"
  55                         ;;
  56                 deny)
  57                         append base_cfg "macaddr_acl=0" "$N"
  58                         append base_cfg "deny_mac_file=$macfile" "$N"
  59                         ;;
  60         esac
  61         config_get maclist "$vif" maclist
  62         [ -n "$maclist" ] && {
  63                 for mac in $maclist; do
  64                         echo "$mac" >> $macfile
  65                 done
  66         }
  67
  68         local br brval brstr
  69         [ -n "$basic_rate_list" ] && {
  70                 for br in $basic_rate_list; do
  71                         brval="$(($br / 100))"
  72                         [ -n "$brstr" ] && brstr="$brstr "
  73                         brstr="$brstr$brval"
  74                 done
  75         }
  76
  77         cat >> "$cfgfile" <<EOF
  78 ctrl_interface=/var/run/hostapd-$phy
  79 driver=nl80211
  80 wmm_ac_bk_cwmin=4
  81 wmm_ac_bk_cwmax=10
  82 wmm_ac_bk_aifs=7
  83 wmm_ac_bk_txop_limit=0
  84 wmm_ac_bk_acm=0
  85 wmm_ac_be_aifs=3
  86 wmm_ac_be_cwmin=4
  87 wmm_ac_be_cwmax=10
  88 wmm_ac_be_txop_limit=0
  89 wmm_ac_be_acm=0
  90 wmm_ac_vi_aifs=2
  91 wmm_ac_vi_cwmin=3
  92 wmm_ac_vi_cwmax=4
  93 wmm_ac_vi_txop_limit=94
  94 wmm_ac_vi_acm=0
  95 wmm_ac_vo_aifs=2
  96 wmm_ac_vo_cwmin=2
  97 wmm_ac_vo_cwmax=3
  98 wmm_ac_vo_txop_limit=47
  99 wmm_ac_vo_acm=0
 100 tx_queue_data3_aifs=7
 101 tx_queue_data3_cwmin=15
 102 tx_queue_data3_cwmax=1023
 103 tx_queue_data3_burst=0
 104 tx_queue_data2_aifs=3
 105 tx_queue_data2_cwmin=15
 106 tx_queue_data2_cwmax=63
 107 tx_queue_data2_burst=0
 108 tx_queue_data1_aifs=1
 109 tx_queue_data1_cwmin=7
 110 tx_queue_data1_cwmax=15
 111 tx_queue_data1_burst=3.0
 112 tx_queue_data0_aifs=1
 113 tx_queue_data0_cwmin=3
 114 tx_queue_data0_cwmax=7
 115 tx_queue_data0_burst=1.5
 116 ${hwmode:+hw_mode=$hwmode}
 117 ${channel:+channel=$channel}
 118 ${beacon_int:+beacon_int=$beacon_int}
 119 ${country:+country_code=$country}
 120 ${noscan:+noscan=$noscan}
 121 ${brstr:+basic_rates=$brstr}
 122 $base_cfg
 123
 124 EOF
 125 }
 126
 127 mac80211_hostapd_setup_bss() {
 128         local phy="$1"
 129         local vif="$2"
 130
 131         hostapd_cfg=
 132         cfgfile="/var/run/hostapd-$phy.conf"
 133         config_get ifname "$vif" ifname
 134
 135         if [ -f "$cfgfile" ]; then
 136                 append hostapd_cfg "bss=$ifname" "$N"
 137         else
 138                 mac80211_hostapd_setup_base "$phy" "$ifname"
 139                 append hostapd_cfg "interface=$ifname" "$N"
 140         fi
 141
 142         local net_cfg bridge
 143         net_cfg="$(find_net_config "$vif")"
 144         [ -z "$net_cfg" ] || bridge="$(bridge_interface "$net_cfg")"
 145         config_set "$vif" bridge "$bridge"
 146
 147         hostapd_set_bss_options hostapd_cfg "$vif"
 148
 149         config_get_bool wds "$vif" wds 0
 150         [ "$wds" -gt 0 ] && append hostapd_cfg "wds_sta=1" "$N"
 151
 152         local macaddr hidden maxassoc wmm
 153         config_get macaddr "$vif" macaddr
 154         config_get maxassoc "$vif" maxassoc
 155         config_get dtim_period "$vif" dtim_period
 156         config_get max_listen_int "$vif" max_listen_int
 157         config_get_bool hidden "$vif" hidden 0
 158         config_get_bool wmm "$vif" wmm 1
 159         cat >> /var/run/hostapd-$phy.conf <<EOF
 160 $hostapd_cfg
 161 wmm_enabled=$wmm
 162 bssid=$macaddr
 163 ignore_broadcast_ssid=$hidden
 164 ${dtim_period:+dtim_period=$dtim_period}
 165 ${max_listen_int:+max_listen_interval=$max_listen_int}
 166 ${maxassoc:+max_num_sta=$maxassoc}
 167 EOF
 168 }
 169
 170 mac80211_start_vif() {
 171         local vif="$1"
 172         local ifname="$2"
 173
 174         local net_cfg
 175         net_cfg="$(find_net_config "$vif")"
 176         [ -z "$net_cfg" ] || start_net "$ifname" "$net_cfg"
 177
 178         set_wifi_up "$vif" "$ifname"
 179 }
 180
 181 find_mac80211_phy() {
 182         local device="$1"
 183
 184         local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
 185         config_get phy "$device" phy
 186         [ -z "$phy" -a -n "$macaddr" ] && {
 187                 for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
 188                         [ "$macaddr" = "$(cat /sys/class/ieee80211/${phy}/macaddress)" ] || continue
 189                         config_set "$device" phy "$phy"
 190                         break
 191                 done
 192                 config_get phy "$device" phy
 193         }
 194         [ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
 195                 echo "PHY for wifi device $1 not found"
 196                 return 1
 197         }
 198         [ -z "$macaddr" ] && {
 199                 config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
 200         }
 201         return 0
 202 }
 203
 204 scan_mac80211() {
 205         local device="$1"
 206         local adhoc sta ap monitor mesh
 207
 208         config_get vifs "$device" vifs
 209         for vif in $vifs; do
 210                 config_get mode "$vif" mode
 211                 case "$mode" in
 212                         adhoc|sta|ap|monitor|mesh)
 213                                 append $mode "$vif"
 214                         ;;
 215                         *) echo "$device($vif): Invalid mode, ignored."; continue;;
 216                 esac
 217         done
 218
 219         config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
 220 }
 221
 222 list_phy_interfaces() {
 223         local phy="$1"
 224         if [ -d "/sys/class/ieee80211/${phy}/device/net" ]; then
 225                 ls "/sys/class/ieee80211/${phy}/device/net" 2>/dev/null;
 226         else
 227                 ls "/sys/class/ieee80211/${phy}/device" 2>/dev/null | grep net: | sed -e 's,net:,,g'
 228         fi
 229 }
 230
 231 disable_mac80211() (
 232         local device="$1"
 233
 234         find_mac80211_phy "$device" || return 0
 235         config_get phy "$device" phy
 236
 237         set_wifi_down "$device"
 238         # kill all running hostapd and wpa_supplicant processes that
 239         # are running on atheros/mac80211 vifs
 240         for pid in `pidof hostapd`; do
 241                 grep -E "$phy" /proc/$pid/cmdline >/dev/null && \
 242                         kill $pid
 243         done
 244
 245         include /lib/network
 246         for wdev in $(list_phy_interfaces "$phy"); do
 247                 [ -f "/var/run/$wdev.pid" ] && kill $(cat /var/run/$wdev.pid) >&/dev/null 2>&1
 248                 for pid in `pidof wpa_supplicant`; do
 249                         grep "$wdev" /proc/$pid/cmdline >/dev/null && \
 250                                 kill $pid
 251                 done
 252                 ifconfig "$wdev" down 2>/dev/null
 253                 unbridge "$dev"
 254                 iw dev "$wdev" del
 255         done
 256
 257         return 0
 258 )
 259 get_freq() {
 260         local phy="$1"
 261         local chan="$2"
 262         iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
 263 }
 264 enable_mac80211() {
 265         local device="$1"
 266         config_get channel "$device" channel
 267         config_get vifs "$device" vifs
 268         config_get txpower "$device" txpower
 269         config_get country "$device" country
 270         config_get distance "$device" distance
 271         config_get txantenna "$device" txantenna all
 272         config_get rxantenna "$device" rxantenna all
 273         config_get frag "$device" frag
 274         config_get rts "$device" rts
 275         find_mac80211_phy "$device" || return 0
 276         config_get phy "$device" phy
 277         local i=0
 278         local macidx=0
 279         local apidx=0
 280         fixed=""
 281         local hostapd_ctrl=""
 282
 283         [ -n "$country" ] && iw reg set "$country"
 284         [ "$channel" = "auto" -o "$channel" = "0" ] || {
 285                 fixed=1
 286         }
 287
 288         iw phy "$phy" set antenna $txantenna $rxantenna >/dev/null 2>&1
 289
 290         [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
 291         [ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
 292         [ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"
 293
 294         export channel fixed
 295         # convert channel to frequency
 296         local freq="$(get_freq "$phy" "${fixed:+$channel}")"
 297
 298         wifi_fixup_hwmode "$device" "g"
 299         for vif in $vifs; do
 300                 while [ -d "/sys/class/net/wlan$i" ]; do
 301                         i=$(($i + 1))
 302                 done
 303
 304                 config_get ifname "$vif" ifname
 305                 [ -n "$ifname" ] || {
 306                         ifname="wlan$i"
 307                 }
 308                 config_set "$vif" ifname "$ifname"
 309
 310                 config_get mode "$vif" mode
 311                 config_get ssid "$vif" ssid
 312
 313                 # It is far easier to delete and create the desired interface
 314                 case "$mode" in
 315                         adhoc)
 316                                 iw phy "$phy" interface add "$ifname" type adhoc
 317                         ;;
 318                         ap)
 319                                 # Hostapd will handle recreating the interface and
 320                                 # it's accompanying monitor
 321                                 apidx="$(($apidx + 1))"
 322                                 i=$(($i + 1))
 323                                 [ "$apidx" -gt 1 ] || iw phy "$phy" interface add "$ifname" type managed
 324                         ;;
 325                         mesh)
 326                                 config_get mesh_id "$vif" mesh_id
 327                                 iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
 328                         ;;
 329                         monitor)
 330                                 iw phy "$phy" interface add "$ifname" type monitor
 331                         ;;
 332                         sta)
 333                                 local wdsflag
 334                                 config_get_bool wds "$vif" wds 0
 335                                 [ "$wds" -gt 0 ] && wdsflag="4addr on"
 336                                 iw phy "$phy" interface add "$ifname" type managed $wdsflag
 337                                 config_get_bool powersave "$vif" powersave 0
 338                                 [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
 339                                 iwconfig "$ifname" power "$powersave"
 340                         ;;
 341                 esac
 342
 343                 # All interfaces must have unique mac addresses
 344                 # which can either be explicitly set in the device
 345                 # section, or automatically generated
 346                 config_get macaddr "$device" macaddr
 347                 local mac_1="${macaddr%%:*}"
 348                 local mac_2="${macaddr#*:}"
 349
 350                 config_get vif_mac "$vif" macaddr
 351                 [ -n "$vif_mac" ] || {
 352                         if [ "$macidx" -gt 0 ]; then
 353                                 offset="$(( 2 + $macidx * 4 ))"
 354                         else
 355                                 offset="0"
 356                         fi
 357                         vif_mac="$( printf %02x $((0x$mac_1 + $offset)) ):$mac_2"
 358                         macidx="$(($macidx + 1))"
 359                 }
 360                 [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
 361                 config_set "$vif" macaddr "$vif_mac"
 362
 363                 # !! ap !!
 364                 #
 365                 # ALL ap functionality will be passed to hostapd
 366                 #
 367                 # !! station !!
 368                 #
 369                 # ALL station functionality will be passed to wpa_supplicant
 370                 #
 371                 if [ ! "$mode" = "ap" ]; then
 372                         # We attempt to set the channel for all interfaces, although
 373                         # mac80211 may not support it or the driver might not yet
 374                         # for ap mode this is handled by hostapd
 375                         [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
 376                 fi
 377
 378                 config_get vif_txpower "$vif" txpower
 379                 # use vif_txpower (from wifi-iface) to override txpower (from
 380                 # wifi-device) if the latter doesn't exist
 381                 txpower="${txpower:-$vif_txpower}"
 382                 [ -z "$txpower" ] || iw dev "$ifname" set txpower fixed "${txpower%%.*}00"
 383         done
 384
 385         local start_hostapd=
 386         rm -f /var/run/hostapd-$phy.conf
 387         for vif in $vifs; do
 388                 config_get mode "$vif" mode
 389                 [ "$mode" = "ap" ] || continue
 390                 mac80211_hostapd_setup_bss "$phy" "$vif"
 391                 start_hostapd=1
 392         done
 393
 394         [ -n "$start_hostapd" ] && {
 395                 hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
 396                         echo "Failed to start hostapd for $phy"
 397                         return
 398                 }
 399                 sleep 2
 400
 401                 for vif in $vifs; do
 402                         config_get mode "$vif" mode
 403                         config_get ifname "$vif" ifname
 404                         [ "$mode" = "ap" ] || continue
 405                         hostapd_ctrl="${hostapd_ctrl:-/var/run/hostapd-$phy/$ifname}"
 406                         mac80211_start_vif "$vif" "$ifname"
 407                 done
 408         }
 409
 410         for vif in $vifs; do
 411                 config_get mode "$vif" mode
 412                 config_get ifname "$vif" ifname
 413                 [ ! "$mode" = "ap" ] || continue
 414                 ifconfig "$ifname" up
 415
 416                 if [ ! "$mode" = "ap" ]; then
 417                         ifconfig "$ifname" up
 418                         case "$mode" in
 419                                 adhoc)
 420                                         config_get bssid "$vif" bssid
 421                                         config_get ssid "$vif" ssid
 422                                         config_get beacon_int "$device" beacon_int
 423                                         config_get basic_rate_list "$device" basic_rate
 424                                         config_get encryption "$vif" encryption
 425                                         config_get key "$vif" key 1
 426                                         config_get mcast_rate "$vif" mcast_rate
 427
 428                                         local keyspec=""
 429                                         [ "$encryption" == "wep" ] && {
 430                                                 case "$key" in
 431                                                         [1234])
 432                                                                 local idx
 433                                                                 for idx in 1 2 3 4; do
 434                                                                         local ikey
 435                                                                         config_get ikey "$vif" "key$idx"
 436
 437                                                                         [ -n "$ikey" ] && {
 438                                                                                 ikey="$(($idx - 1)):$(prepare_key_wep "$ikey")"
 439                                                                                 [ $idx -eq $key ] && ikey="d:$ikey"
 440                                                                                 append keyspec "$ikey"
 441                                                                         }
 442                                                                 done
 443                                                         ;;
 444                                                         *) append keyspec "d:0:$(prepare_key_wep "$key")" ;;
 445                                                 esac
 446                                         }
 447
 448                                         local br brval brsub brstr
 449                                         [ -n "$basic_rate_list" ] && {
 450                                                 for br in $basic_rate_list; do
 451                                                         brval="$(($br / 1000))"
 452                                                         brsub="$((($br / 100) % 10))"
 453                                                         [ "$brsub" -gt 0 ] && brval="$brval.$brsub"
 454                                                         [ -n "$brstr" ] && brstr="$brstr,"
 455                                                         brstr="$brstr$brval"
 456                                                 done
 457                                         }
 458
 459                                         local mcval=""
 460                                         [ -n "$mcast_rate" ] && {
 461                                                 mcval="$(($mcast_rate / 1000))"
 462                                                 mcsub="$(( ($mcast_rate / 100) % 10 ))"
 463                                                 [ "$mcsub" -gt 0 ] && mcval="$mcval.$mcsub"
 464                                         }
 465
 466                                         config_get htmode "$device" htmode
 467                                         case "$htmode" in
 468                                                 HT20|HT40+|HT40-) ;;
 469                                                 *) htmode= ;;
 470                                         esac
 471
 472                                         iw dev "$ifname" ibss join "$ssid" $freq $htmode \
 473                                                 ${fixed:+fixed-freq} $bssid \
 474                                                 ${beacon_int:+beacon-interval $beacon_int} \
 475                                                 ${brstr:+basic-rates $brstr} \
 476                                                 ${mcval:+mcast-rate $mcval} \
 477                                                 ${keyspec:+keys $keyspec}
 478                                 ;;
 479                                 sta)
 480                                         if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
 481                                                 wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" || {
 482                                                         echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
 483                                                         # make sure this wifi interface won't accidentally stay open without encryption
 484                                                         ifconfig "$ifname" down
 485                                                         continue
 486                                                 }
 487                                         fi
 488                                 ;;
 489                         esac
 490                         mac80211_start_vif "$vif" "$ifname"
 491                 fi
 492         done
 493
 494 }
 495
 496
 497 check_mac80211_device() {
 498         config_get phy "$1" phy
 499         [ -z "$phy" ] && {
 500                 find_mac80211_phy "$1" >/dev/null || return 0
 501                 config_get phy "$1" phy
 502         }
 503         [ "$phy" = "$dev" ] && found=1
 504 }
 505
 506 detect_mac80211() {
 507         devidx=0
 508         config_load wireless
 509         while :; do
 510                 config_get type "radio$devidx" type
 511                 [ -n "$type" ] || break
 512                 devidx=$(($devidx + 1))
 513         done
 514         for dev in $(ls /sys/class/ieee80211); do
 515                 found=0
 516                 config_foreach check_mac80211_device wifi-device
 517                 [ "$found" -gt 0 ] && continue
 518
 519                 mode_11n=""
 520                 mode_band="g"
 521                 channel="11"
 522                 ht_cap=0
 523                 for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
 524                         ht_cap="$(($ht_cap | $cap))"
 525                 done
 526                 ht_capab="";
 527                 [ "$ht_cap" -gt 0 ] && {
 528                         mode_11n="n"
 529                         append ht_capab "       option htmode   HT20" "$N"
 530
 531                         list="  list ht_capab"
 532                         [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list  LDPC" "$N"
 533                         [ "$(($ht_cap & 16))" -eq 16 ] && append ht_capab "$list        GF" "$N"
 534                         [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list        SHORT-GI-20" "$N"
 535                         [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list        SHORT-GI-40" "$N"
 536                         [ "$(($ht_cap & 128))" -eq 128 ] && append ht_capab "$list      TX-STBC" "$N"
 537                         [ "$(($ht_cap & 768))" -eq 256 ] && append ht_capab "$list      RX-STBC1" "$N"
 538                         [ "$(($ht_cap & 768))" -eq 512 ] && append ht_capab "$list      RX-STBC12" "$N"
 539                         [ "$(($ht_cap & 768))" -eq 768 ] && append ht_capab "$list      RX-STBC123" "$N"
 540                         [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list    DSSS_CCK-40" "$N"
 541                 }
 542                 iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
 543
 544                 cat <<EOF
 545 config wifi-device  radio$devidx
 546         option type     mac80211
 547         option channel  ${channel}
 548         option macaddr  $(cat /sys/class/ieee80211/${dev}/macaddress)
 549         option hwmode   11${mode_11n}${mode_band}
 550 $ht_capab
 551         # REMOVE THIS LINE TO ENABLE WIFI:
 552         option disabled 1
 553
 554 config wifi-iface
 555         option device   radio$devidx
 556         option network  lan
 557         option mode     ap
 558         option ssid     OpenWrt
 559         option encryption none
 560
 561 EOF
 562         devidx=$(($devidx + 1))
 563         done
 564 }
 565