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