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