package/mac80211/files/lib/wifi/mac80211.sh

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