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

1#!/bin/sh
2append DRIVERS "mac80211"
3
4mac80211_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    config_get_bool short_preamble "$device" short_preamble "0"
20
21    hostapd_set_log_options base_cfg "$device"
22
23    [ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
24
25    [ "$channel" = auto ] && {
26        channel=$(iw phy "$phy" info | \
27            sed -ne '/MHz/ { /disabled\|passive\|radar/d; s/.*\[//; s/\].*//; p; q }')
28        config_set "$device" channel "$channel"
29    }
30
31    [ -n "$hwmode" ] && {
32        config_get hwmode_11n "$device" hwmode_11n
33        [ -n "$hwmode_11n" ] && {
34            hwmode="$hwmode_11n"
35            append base_cfg "ieee80211n=1" "$N"
36            config_get htmode "$device" htmode
37            config_get ht_capab_list "$device" ht_capab
38            case "$htmode" in
39                HT20|HT40+|HT40-) ht_capab="[$htmode]";;
40                *)ht_capab=;;
41            esac
42            for cap in $ht_capab_list; do
43                ht_capab="$ht_capab[$cap]"
44            done
45            [ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
46        }
47    }
48
49    local country_ie=0
50    [ -n "$country" ] && country_ie=1
51    config_get_bool country_ie "$device" country_ie "$country_ie"
52    [ "$country_ie" -gt 0 ] && append base_cfg "ieee80211d=1" "$N"
53
54    config_get macfilter "$vif" macfilter
55    case "$macfilter" in
56        allow)
57            append base_cfg "macaddr_acl=1" "$N"
58            append base_cfg "accept_mac_file=$macfile" "$N"
59            ;;
60        deny)
61            append base_cfg "macaddr_acl=0" "$N"
62            append base_cfg "deny_mac_file=$macfile" "$N"
63            ;;
64    esac
65    config_get maclist "$vif" maclist
66    [ -n "$maclist" ] && {
67        for mac in $maclist; do
68            echo "$mac" >> $macfile
69        done
70    }
71
72    local br brval brstr
73    [ -n "$basic_rate_list" ] && {
74        for br in $basic_rate_list; do
75            brval="$(($br / 100))"
76            [ -n "$brstr" ] && brstr="$brstr "
77            brstr="$brstr$brval"
78        done
79    }
80
81    append base_cfg "preamble=$short_preamble" "$N"
82    
83    cat >> "$cfgfile" <<EOF
84ctrl_interface=/var/run/hostapd-$phy
85driver=nl80211
86wmm_ac_bk_cwmin=4
87wmm_ac_bk_cwmax=10
88wmm_ac_bk_aifs=7
89wmm_ac_bk_txop_limit=0
90wmm_ac_bk_acm=0
91wmm_ac_be_aifs=3
92wmm_ac_be_cwmin=4
93wmm_ac_be_cwmax=10
94wmm_ac_be_txop_limit=0
95wmm_ac_be_acm=0
96wmm_ac_vi_aifs=2
97wmm_ac_vi_cwmin=3
98wmm_ac_vi_cwmax=4
99wmm_ac_vi_txop_limit=94
100wmm_ac_vi_acm=0
101wmm_ac_vo_aifs=2
102wmm_ac_vo_cwmin=2
103wmm_ac_vo_cwmax=3
104wmm_ac_vo_txop_limit=47
105wmm_ac_vo_acm=0
106tx_queue_data3_aifs=7
107tx_queue_data3_cwmin=15
108tx_queue_data3_cwmax=1023
109tx_queue_data3_burst=0
110tx_queue_data2_aifs=3
111tx_queue_data2_cwmin=15
112tx_queue_data2_cwmax=63
113tx_queue_data2_burst=0
114tx_queue_data1_aifs=1
115tx_queue_data1_cwmin=7
116tx_queue_data1_cwmax=15
117tx_queue_data1_burst=3.0
118tx_queue_data0_aifs=1
119tx_queue_data0_cwmin=3
120tx_queue_data0_cwmax=7
121tx_queue_data0_burst=1.5
122${hwmode:+hw_mode=$hwmode}
123${channel:+channel=$channel}
124${beacon_int:+beacon_int=$beacon_int}
125${country:+country_code=$country}
126${noscan:+noscan=$noscan}
127${brstr:+basic_rates=$brstr}
128$base_cfg
129
130EOF
131}
132
133mac80211_hostapd_setup_bss() {
134    local phy="$1"
135    local vif="$2"
136
137    hostapd_cfg=
138    cfgfile="/var/run/hostapd-$phy.conf"
139    config_get ifname "$vif" ifname
140
141    if [ -f "$cfgfile" ]; then
142        append hostapd_cfg "bss=$ifname" "$N"
143    else
144        mac80211_hostapd_setup_base "$phy" "$ifname"
145        append hostapd_cfg "interface=$ifname" "$N"
146    fi
147
148    local net_cfg bridge
149    net_cfg="$(find_net_config "$vif")"
150    [ -z "$net_cfg" ] || bridge="$(bridge_interface "$net_cfg")"
151    config_set "$vif" bridge "$bridge"
152
153    hostapd_set_bss_options hostapd_cfg "$vif"
154
155    config_get_bool wds "$vif" wds 0
156    [ "$wds" -gt 0 ] && append hostapd_cfg "wds_sta=1" "$N"
157
158    local macaddr hidden maxassoc wmm
159    config_get macaddr "$vif" macaddr
160    config_get maxassoc "$vif" maxassoc
161    config_get dtim_period "$vif" dtim_period
162    config_get max_listen_int "$vif" max_listen_int
163    config_get_bool hidden "$vif" hidden 0
164    config_get_bool wmm "$vif" wmm 1
165    cat >> /var/run/hostapd-$phy.conf <<EOF
166$hostapd_cfg
167wmm_enabled=$wmm
168bssid=$macaddr
169ignore_broadcast_ssid=$hidden
170${dtim_period:+dtim_period=$dtim_period}
171${max_listen_int:+max_listen_interval=$max_listen_int}
172${maxassoc:+max_num_sta=$maxassoc}
173EOF
174}
175
176mac80211_start_vif() {
177    local vif="$1"
178    local ifname="$2"
179
180    local net_cfg
181    net_cfg="$(find_net_config "$vif")"
182    [ -z "$net_cfg" ] || start_net "$ifname" "$net_cfg"
183
184    set_wifi_up "$vif" "$ifname"
185}
186
187find_mac80211_phy() {
188    local device="$1"
189
190    local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
191    config_get phy "$device" phy
192    [ -z "$phy" -a -n "$macaddr" ] && {
193        for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
194            [ "$macaddr" = "$(cat /sys/class/ieee80211/${phy}/macaddress)" ] || continue
195            config_set "$device" phy "$phy"
196            break
197        done
198        config_get phy "$device" phy
199    }
200    [ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
201        echo "PHY for wifi device $1 not found"
202        return 1
203    }
204    [ -z "$macaddr" ] && {
205        config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
206    }
207    return 0
208}
209
210scan_mac80211() {
211    local device="$1"
212    local adhoc sta ap monitor mesh disabled
213
214    config_get vifs "$device" vifs
215    for vif in $vifs; do
216        config_get_bool disabled "$vif" disabled 0
217        [ $disabled = 0 ] || continue
218
219        config_get mode "$vif" mode
220        case "$mode" in
221            adhoc|sta|ap|monitor|mesh)
222                append $mode "$vif"
223            ;;
224            *) echo "$device($vif): Invalid mode, ignored."; continue;;
225        esac
226    done
227
228    config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
229}
230
231list_phy_interfaces() {
232    local phy="$1"
233    if [ -d "/sys/class/ieee80211/${phy}/device/net" ]; then
234        ls "/sys/class/ieee80211/${phy}/device/net" 2>/dev/null;
235    else
236        ls "/sys/class/ieee80211/${phy}/device" 2>/dev/null | grep net: | sed -e 's,net:,,g'
237    fi
238}
239
240disable_mac80211() (
241    local device="$1"
242
243    find_mac80211_phy "$device" || return 0
244    config_get phy "$device" phy
245
246    set_wifi_down "$device"
247    # kill all running hostapd and wpa_supplicant processes that
248    # are running on atheros/mac80211 vifs
249    for pid in `pidof hostapd`; do
250        grep -E "$phy" /proc/$pid/cmdline >/dev/null && \
251            kill $pid
252    done
253
254    include /lib/network
255    for wdev in $(list_phy_interfaces "$phy"); do
256        [ -f "/var/run/$wdev.pid" ] && kill $(cat /var/run/$wdev.pid) >&/dev/null 2>&1
257        for pid in `pidof wpa_supplicant`; do
258            grep "$wdev" /proc/$pid/cmdline >/dev/null && \
259                kill $pid
260        done
261        ifconfig "$wdev" down 2>/dev/null
262        unbridge "$dev"
263        iw dev "$wdev" del
264    done
265
266    return 0
267)
268
269get_freq() {
270    local phy="$1"
271    local chan="$2"
272    iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
273}
274
275mac80211_generate_mac() {
276    local off="$1"
277    local mac="$2"
278    local oIFS="$IFS"; IFS=":"; set -- $mac; IFS="$oIFS"
279
280    local b2mask=0x00
281    [ $off -gt 0 ] && b2mask=0x02
282
283    printf "%02x:%s:%s:%s:%02x:%02x" \
284        $(( 0x$1 | $b2mask )) $2 $3 $4 \
285        $(( (0x$5 + ($off / 0x100)) % 0x100 )) \
286        $(( (0x$6 + $off) % 0x100 ))
287}
288
289enable_mac80211() {
290    local device="$1"
291    config_get channel "$device" channel
292    config_get vifs "$device" vifs
293    config_get txpower "$device" txpower
294    config_get country "$device" country
295    config_get distance "$device" distance
296    config_get txantenna "$device" txantenna all
297    config_get rxantenna "$device" rxantenna all
298    config_get frag "$device" frag
299    config_get rts "$device" rts
300    find_mac80211_phy "$device" || return 0
301    config_get phy "$device" phy
302    local i=0
303    local macidx=0
304    local apidx=0
305    fixed=""
306    local hostapd_ctrl=""
307
308    [ -n "$country" ] && {
309        iw reg get | grep -q "^country $country:" || {
310            iw reg set "$country"
311            sleep 1
312        }
313    }
314
315    config_get ath9k_chanbw "$device" ath9k_chanbw
316    [ -n "$ath9k_chanbw" -a -d /sys/kernel/debug/ieee80211/$phy/ath9k ] && echo "$ath9k_chanbw" > /sys/kernel/debug/ieee80211/$phy/ath9k/chanbw
317
318    [ -n "$country" ] && iw reg set "$country"
319    [ "$channel" = "auto" -o "$channel" = "0" ] || {
320        fixed=1
321    }
322
323    iw phy "$phy" set antenna $txantenna $rxantenna >/dev/null 2>&1
324
325    [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
326    [ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
327    [ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"
328
329    export channel fixed
330    # convert channel to frequency
331    local freq="$(get_freq "$phy" "${fixed:+$channel}")"
332
333    wifi_fixup_hwmode "$device" "g"
334    for vif in $vifs; do
335        config_get ifname "$vif" ifname
336        [ -n "$ifname" ] || {
337            [ $i -gt 0 ] && ifname="wlan${phy#phy}-$i" || ifname="wlan${phy#phy}"
338        }
339        config_set "$vif" ifname "$ifname"
340
341        config_get mode "$vif" mode
342        config_get ssid "$vif" ssid
343
344        # It is far easier to delete and create the desired interface
345        case "$mode" in
346            adhoc)
347                iw phy "$phy" interface add "$ifname" type adhoc
348            ;;
349            ap)
350                # Hostapd will handle recreating the interface and
351                # it's accompanying monitor
352                apidx="$(($apidx + 1))"
353                [ "$apidx" -gt 1 ] || iw phy "$phy" interface add "$ifname" type managed
354            ;;
355            mesh)
356                config_get mesh_id "$vif" mesh_id
357                iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
358            ;;
359            monitor)
360                iw phy "$phy" interface add "$ifname" type monitor
361            ;;
362            sta)
363                local wdsflag
364                config_get_bool wds "$vif" wds 0
365                [ "$wds" -gt 0 ] && wdsflag="4addr on"
366                iw phy "$phy" interface add "$ifname" type managed $wdsflag
367                config_get_bool powersave "$vif" powersave 0
368                [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
369                iw "$ifname" set power_save "$powersave"
370            ;;
371        esac
372
373        # All interfaces must have unique mac addresses
374        # which can either be explicitly set in the device
375        # section, or automatically generated
376        config_get macaddr "$device" macaddr
377        config_get vif_mac "$vif" macaddr
378        [ -n "$vif_mac" ] || {
379            vif_mac="$(mac80211_generate_mac $macidx $macaddr)"
380            macidx="$(($macidx + 1))"
381        }
382        [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
383        config_set "$vif" macaddr "$vif_mac"
384
385        # !! ap !!
386        #
387        # ALL ap functionality will be passed to hostapd
388        #
389        # !! station !!
390        #
391        # ALL station functionality will be passed to wpa_supplicant
392        #
393        if [ ! "$mode" = "ap" ]; then
394            # We attempt to set the channel for all interfaces, although
395            # mac80211 may not support it or the driver might not yet
396            # for ap mode this is handled by hostapd
397            [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
398        fi
399
400        i=$(($i + 1))
401    done
402
403    local start_hostapd=
404    rm -f /var/run/hostapd-$phy.conf
405    for vif in $vifs; do
406        config_get mode "$vif" mode
407        [ "$mode" = "ap" ] || continue
408        mac80211_hostapd_setup_bss "$phy" "$vif"
409        start_hostapd=1
410    done
411
412    [ -n "$start_hostapd" ] && {
413        hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
414            echo "Failed to start hostapd for $phy"
415            return
416        }
417        sleep 2
418
419        for vif in $vifs; do
420            config_get mode "$vif" mode
421            config_get ifname "$vif" ifname
422            [ "$mode" = "ap" ] || continue
423            hostapd_ctrl="${hostapd_ctrl:-/var/run/hostapd-$phy/$ifname}"
424            mac80211_start_vif "$vif" "$ifname"
425        done
426    }
427
428    for vif in $vifs; do
429        config_get mode "$vif" mode
430        config_get ifname "$vif" ifname
431        [ "$mode" = "ap" ] || ifconfig "$ifname" up
432
433        config_get vif_txpower "$vif" txpower
434        # use vif_txpower (from wifi-iface) to override txpower (from
435        # wifi-device) if the latter doesn't exist
436        txpower="${txpower:-$vif_txpower}"
437        [ -z "$txpower" ] || iw dev "$ifname" set txpower fixed "${txpower%%.*}00"
438
439        case "$mode" in
440            adhoc)
441                config_get bssid "$vif" bssid
442                config_get ssid "$vif" ssid
443                config_get beacon_int "$device" beacon_int
444                config_get basic_rate_list "$device" basic_rate
445                config_get encryption "$vif" encryption
446                config_get key "$vif" key 1
447                config_get mcast_rate "$vif" mcast_rate
448
449                local keyspec=""
450                [ "$encryption" == "wep" ] && {
451                    case "$key" in
452                        [1234])
453                            local idx
454                            for idx in 1 2 3 4; do
455                                local ikey
456                                config_get ikey "$vif" "key$idx"
457
458                                [ -n "$ikey" ] && {
459                                    ikey="$(($idx - 1)):$(prepare_key_wep "$ikey")"
460                                    [ $idx -eq $key ] && ikey="d:$ikey"
461                                    append keyspec "$ikey"
462                                }
463                            done
464                        ;;
465                        *) append keyspec "d:0:$(prepare_key_wep "$key")" ;;
466                    esac
467                }
468
469                local br brval brsub brstr
470                [ -n "$basic_rate_list" ] && {
471                    for br in $basic_rate_list; do
472                        brval="$(($br / 1000))"
473                        brsub="$((($br / 100) % 10))"
474                        [ "$brsub" -gt 0 ] && brval="$brval.$brsub"
475                        [ -n "$brstr" ] && brstr="$brstr,"
476                        brstr="$brstr$brval"
477                    done
478                }
479
480                local mcval=""
481                [ -n "$mcast_rate" ] && {
482                    mcval="$(($mcast_rate / 1000))"
483                    mcsub="$(( ($mcast_rate / 100) % 10 ))"
484                    [ "$mcsub" -gt 0 ] && mcval="$mcval.$mcsub"
485                }
486
487                config_get htmode "$device" htmode
488                case "$htmode" in
489                    HT20|HT40+|HT40-) ;;
490                    *) htmode= ;;
491                esac
492
493                iw dev "$ifname" ibss join "$ssid" $freq $htmode \
494                    ${fixed:+fixed-freq} $bssid \
495                    ${beacon_int:+beacon-interval $beacon_int} \
496                    ${brstr:+basic-rates $brstr} \
497                    ${mcval:+mcast-rate $mcval} \
498                    ${keyspec:+keys $keyspec}
499            ;;
500            sta)
501                if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
502                    wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" || {
503                        echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
504                        # make sure this wifi interface won't accidentally stay open without encryption
505                        ifconfig "$ifname" down
506                        continue
507                    }
508                fi
509            ;;
510        esac
511        [ "$mode" = "ap" ] || mac80211_start_vif "$vif" "$ifname"
512    done
513
514}
515
516
517check_mac80211_device() {
518    config_get phy "$1" phy
519    [ -z "$phy" ] && {
520        find_mac80211_phy "$1" >/dev/null || return 0
521        config_get phy "$1" phy
522    }
523    [ "$phy" = "$dev" ] && found=1
524}
525
526detect_mac80211() {
527    devidx=0
528    config_load wireless
529    while :; do
530        config_get type "radio$devidx" type
531        [ -n "$type" ] || break
532        devidx=$(($devidx + 1))
533    done
534    for dev in $(ls /sys/class/ieee80211); do
535        found=0
536        config_foreach check_mac80211_device wifi-device
537        [ "$found" -gt 0 ] && continue
538
539        mode_11n=""
540        mode_band="g"
541        channel="11"
542        ht_cap=0
543        for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
544            ht_cap="$(($ht_cap | $cap))"
545        done
546        ht_capab="";
547        [ "$ht_cap" -gt 0 ] && {
548            mode_11n="n"
549            append ht_capab " option htmode HT20" "$N"
550
551            list=" list ht_capab"
552            [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list LDPC" "$N"
553            [ "$(($ht_cap & 16))" -eq 16 ] && append ht_capab "$list GF" "$N"
554            [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list SHORT-GI-20" "$N"
555            [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list SHORT-GI-40" "$N"
556            [ "$(($ht_cap & 128))" -eq 128 ] && append ht_capab "$list TX-STBC" "$N"
557            [ "$(($ht_cap & 768))" -eq 256 ] && append ht_capab "$list RX-STBC1" "$N"
558            [ "$(($ht_cap & 768))" -eq 512 ] && append ht_capab "$list RX-STBC12" "$N"
559            [ "$(($ht_cap & 768))" -eq 768 ] && append ht_capab "$list RX-STBC123" "$N"
560            [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list DSSS_CCK-40" "$N"
561        }
562        iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
563
564        cat <<EOF
565config wifi-device radio$devidx
566    option type mac80211
567    option channel ${channel}
568    option macaddr $(cat /sys/class/ieee80211/${dev}/macaddress)
569    option hwmode 11${mode_11n}${mode_band}
570$ht_capab
571    # REMOVE THIS LINE TO ENABLE WIFI:
572    option disabled 1
573
574config wifi-iface
575    option device radio$devidx
576    option network lan
577    option mode ap
578    option ssid OpenWrt
579    option encryption none
580
581EOF
582    devidx=$(($devidx + 1))
583    done
584}
585
586

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