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

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