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
10    config_get device "$vif" device
11    config_get country "$device" country
12    config_get hwmode "$device" hwmode
13    config_get channel "$device" channel
14    config_get beacon_int "$device" beacon_int
15    config_get basic_rate_list "$device" basic_rate
16    config_get_bool noscan "$device" noscan
17    config_get_bool short_preamble "$device" short_preamble "0"
18
19    hostapd_set_log_options base_cfg "$device"
20
21    [ -n "$channel" -a -z "$hwmode" ] && wifi_fixup_hwmode "$device"
22
23    [ "$channel" = auto ] && {
24        channel=$(iw phy "$phy" info | \
25            sed -ne '/MHz/ { /disabled\|passive\|radar/d; s/.*\[//; s/\].*//; p; q }')
26        config_set "$device" channel "$channel"
27    }
28
29    [ -n "$hwmode" ] && {
30        config_get hwmode_11n "$device" hwmode_11n
31        [ -n "$hwmode_11n" ] && {
32            hwmode="$hwmode_11n"
33            append base_cfg "ieee80211n=1" "$N"
34            config_get htmode "$device" htmode
35            config_get ht_capab_list "$device" ht_capab
36            case "$htmode" in
37                HT20|HT40+|HT40-) ht_capab="[$htmode]";;
38                *)ht_capab=;;
39            esac
40            for cap in $ht_capab_list; do
41                ht_capab="$ht_capab[$cap]"
42            done
43            [ -n "$ht_capab" ] && append base_cfg "ht_capab=$ht_capab" "$N"
44        }
45    }
46
47    local country_ie=0
48    [ -n "$country" ] && country_ie=1
49    config_get_bool country_ie "$device" country_ie "$country_ie"
50    [ "$country_ie" -gt 0 ] && append base_cfg "ieee80211d=1" "$N"
51
52    local br brval brstr
53    [ -n "$basic_rate_list" ] && {
54        for br in $basic_rate_list; do
55            brval="$(($br / 100))"
56            [ -n "$brstr" ] && brstr="$brstr "
57            brstr="$brstr$brval"
58        done
59    }
60
61    append base_cfg "preamble=$short_preamble" "$N"
62    
63    cat >> "$cfgfile" <<EOF
64ctrl_interface=/var/run/hostapd-$phy
65driver=nl80211
66wmm_ac_bk_cwmin=4
67wmm_ac_bk_cwmax=10
68wmm_ac_bk_aifs=7
69wmm_ac_bk_txop_limit=0
70wmm_ac_bk_acm=0
71wmm_ac_be_aifs=3
72wmm_ac_be_cwmin=4
73wmm_ac_be_cwmax=10
74wmm_ac_be_txop_limit=0
75wmm_ac_be_acm=0
76wmm_ac_vi_aifs=2
77wmm_ac_vi_cwmin=3
78wmm_ac_vi_cwmax=4
79wmm_ac_vi_txop_limit=94
80wmm_ac_vi_acm=0
81wmm_ac_vo_aifs=2
82wmm_ac_vo_cwmin=2
83wmm_ac_vo_cwmax=3
84wmm_ac_vo_txop_limit=47
85wmm_ac_vo_acm=0
86tx_queue_data3_aifs=7
87tx_queue_data3_cwmin=15
88tx_queue_data3_cwmax=1023
89tx_queue_data3_burst=0
90tx_queue_data2_aifs=3
91tx_queue_data2_cwmin=15
92tx_queue_data2_cwmax=63
93tx_queue_data2_burst=0
94tx_queue_data1_aifs=1
95tx_queue_data1_cwmin=7
96tx_queue_data1_cwmax=15
97tx_queue_data1_burst=3.0
98tx_queue_data0_aifs=1
99tx_queue_data0_cwmin=3
100tx_queue_data0_cwmax=7
101tx_queue_data0_burst=1.5
102${hwmode:+hw_mode=$hwmode}
103${channel:+channel=$channel}
104${beacon_int:+beacon_int=$beacon_int}
105${country:+country_code=$country}
106${noscan:+noscan=$noscan}
107${brstr:+basic_rates=$brstr}
108$base_cfg
109
110EOF
111}
112
113mac80211_hostapd_setup_bss() {
114    local phy="$1"
115    local vif="$2"
116
117    hostapd_cfg=
118    cfgfile="/var/run/hostapd-$phy.conf"
119    config_get ifname "$vif" ifname
120
121    if [ -f "$cfgfile" ]; then
122        append hostapd_cfg "bss=$ifname" "$N"
123    else
124        mac80211_hostapd_setup_base "$phy" "$ifname"
125        append hostapd_cfg "interface=$ifname" "$N"
126    fi
127
128    local net_cfg bridge
129    net_cfg="$(find_net_config "$vif")"
130    [ -z "$net_cfg" ] || bridge="$(bridge_interface "$net_cfg")"
131    config_set "$vif" bridge "$bridge"
132
133    hostapd_set_bss_options hostapd_cfg "$vif"
134
135    config_get_bool wds "$vif" wds 0
136    [ "$wds" -gt 0 ] && append hostapd_cfg "wds_sta=1" "$N"
137
138    local macaddr hidden maxassoc wmm
139    config_get macaddr "$vif" macaddr
140    config_get maxassoc "$vif" maxassoc
141    config_get dtim_period "$vif" dtim_period
142    config_get max_listen_int "$vif" max_listen_int
143    config_get_bool hidden "$vif" hidden 0
144    config_get_bool wmm "$vif" wmm 1
145    cat >> /var/run/hostapd-$phy.conf <<EOF
146$hostapd_cfg
147wmm_enabled=$wmm
148bssid=$macaddr
149ignore_broadcast_ssid=$hidden
150${dtim_period:+dtim_period=$dtim_period}
151${max_listen_int:+max_listen_interval=$max_listen_int}
152${maxassoc:+max_num_sta=$maxassoc}
153EOF
154}
155
156mac80211_start_vif() {
157    local vif="$1"
158    local ifname="$2"
159
160    local net_cfg
161    net_cfg="$(find_net_config "$vif")"
162    [ -z "$net_cfg" ] || start_net "$ifname" "$net_cfg"
163
164    set_wifi_up "$vif" "$ifname"
165}
166
167lookup_phy() {
168    [ -n "$phy" ] && {
169        [ -d /sys/class/ieee80211/$phy ] && return
170    }
171
172    local devpath
173    config_get devpath "$device" path
174    [ -n "$devpath" -a -d "/sys/devices/$devpath/ieee80211" ] && {
175        phy="$(ls /sys/devices/$devpath/ieee80211 | grep -m 1 phy)"
176        [ -n "$phy" ] && return
177    }
178
179    local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
180    [ -n "$macaddr" ] && {
181        for _phy in $(ls /sys/class/ieee80211 2>/dev/null); do
182            [ "$macaddr" = "$(cat /sys/class/ieee80211/${_phy}/macaddress)" ] || continue
183            phy="$_phy"
184            return
185        done
186    }
187    phy=
188    return
189}
190
191find_mac80211_phy() {
192    local device="$1"
193
194    config_get phy "$device" phy
195    lookup_phy
196    [ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
197        echo "PHY for wifi device $1 not found"
198        return 1
199    }
200    config_set "$device" phy "$phy"
201
202    config_get macaddr "$device" macaddr
203    [ -z "$macaddr" ] && {
204        config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
205    }
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 antenna_gain "$device" antenna_gain 0
299    config_get frag "$device" frag
300    config_get rts "$device" rts
301    find_mac80211_phy "$device" || return 0
302    config_get phy "$device" phy
303    local i=0
304    local macidx=0
305    local apidx=0
306    fixed=""
307    local hostapd_ctrl=""
308
309    [ -n "$country" ] && {
310        iw reg get | grep -q "^country $country:" || {
311            iw reg set "$country"
312            sleep 1
313        }
314    }
315
316    config_get chanbw "$device" chanbw
317    [ -n "$chanbw" -a -d /sys/kernel/debug/ieee80211/$phy/ath9k ] && echo "$chanbw" > /sys/kernel/debug/ieee80211/$phy/ath9k/chanbw
318    [ -n "$chanbw" -a -d /sys/kernel/debug/ieee80211/$phy/ath5k ] && echo "$chanbw" > /sys/kernel/debug/ieee80211/$phy/ath5k/bwmode
319
320    [ "$channel" = "auto" -o "$channel" = "0" ] || {
321        fixed=1
322    }
323
324    iw phy "$phy" set antenna $txantenna $rxantenna >/dev/null 2>&1
325    iw phy "$phy" set antenna_gain $antenna_gain
326
327    [ -n "$distance" ] && iw phy "$phy" set distance "$distance"
328    [ -n "$frag" ] && iw phy "$phy" set frag "${frag%%.*}"
329    [ -n "$rts" ] && iw phy "$phy" set rts "${rts%%.*}"
330
331    export channel fixed
332    # convert channel to frequency
333    local freq="$(get_freq "$phy" "${fixed:+$channel}")"
334
335    wifi_fixup_hwmode "$device" "g"
336    for vif in $vifs; do
337        config_get ifname "$vif" ifname
338        [ -n "$ifname" ] || {
339            [ $i -gt 0 ] && ifname="wlan${phy#phy}-$i" || ifname="wlan${phy#phy}"
340        }
341        config_set "$vif" ifname "$ifname"
342
343        config_get mode "$vif" mode
344        config_get ssid "$vif" ssid
345
346        # It is far easier to delete and create the desired interface
347        case "$mode" in
348            adhoc)
349                iw phy "$phy" interface add "$ifname" type adhoc
350            ;;
351            ap)
352                # Hostapd will handle recreating the interface and
353                # it's accompanying monitor
354                apidx="$(($apidx + 1))"
355                [ "$apidx" -gt 1 ] || iw phy "$phy" interface add "$ifname" type managed
356            ;;
357            mesh)
358                config_get mesh_id "$vif" mesh_id
359                iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
360            ;;
361            monitor)
362                iw phy "$phy" interface add "$ifname" type monitor
363            ;;
364            sta)
365                local wdsflag
366                config_get_bool wds "$vif" wds 0
367                [ "$wds" -gt 0 ] && wdsflag="4addr on"
368                iw phy "$phy" interface add "$ifname" type managed $wdsflag
369                config_get_bool powersave "$vif" powersave 0
370                [ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
371                iw "$ifname" set power_save "$powersave"
372            ;;
373        esac
374
375        # All interfaces must have unique mac addresses
376        # which can either be explicitly set in the device
377        # section, or automatically generated
378        config_get macaddr "$device" macaddr
379        config_get vif_mac "$vif" macaddr
380        [ -n "$vif_mac" ] || {
381            vif_mac="$(mac80211_generate_mac $macidx $macaddr)"
382            macidx="$(($macidx + 1))"
383        }
384        [ "$mode" = "ap" ] || ifconfig "$ifname" hw ether "$vif_mac"
385        config_set "$vif" macaddr "$vif_mac"
386
387        # !! ap !!
388        #
389        # ALL ap functionality will be passed to hostapd
390        #
391        # !! station !!
392        #
393        # ALL station functionality will be passed to wpa_supplicant
394        #
395        if [ ! "$mode" = "ap" ]; then
396            # We attempt to set the channel for all interfaces, although
397            # mac80211 may not support it or the driver might not yet
398            # for ap mode this is handled by hostapd
399            [ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"
400        fi
401
402        i=$(($i + 1))
403    done
404
405    local start_hostapd=
406    rm -f /var/run/hostapd-$phy.conf
407    for vif in $vifs; do
408        config_get mode "$vif" mode
409        [ "$mode" = "ap" ] || continue
410        mac80211_hostapd_setup_bss "$phy" "$vif"
411        start_hostapd=1
412    done
413
414    [ -n "$start_hostapd" ] && {
415        hostapd -P /var/run/wifi-$phy.pid -B /var/run/hostapd-$phy.conf || {
416            echo "Failed to start hostapd for $phy"
417            return
418        }
419        sleep 2
420
421        for vif in $vifs; do
422            config_get mode "$vif" mode
423            config_get ifname "$vif" ifname
424            [ "$mode" = "ap" ] || continue
425            hostapd_ctrl="${hostapd_ctrl:-/var/run/hostapd-$phy/$ifname}"
426            mac80211_start_vif "$vif" "$ifname"
427        done
428    }
429
430    for vif in $vifs; do
431        config_get mode "$vif" mode
432        config_get ifname "$vif" ifname
433        [ "$mode" = "ap" ] || ifconfig "$ifname" up
434
435        config_get vif_txpower "$vif" txpower
436        # use vif_txpower (from wifi-iface) to override txpower (from
437        # wifi-device) if the latter doesn't exist
438        txpower="${txpower:-$vif_txpower}"
439        [ -z "$txpower" ] || iw dev "$ifname" set txpower fixed "${txpower%%.*}00"
440
441        case "$mode" in
442            adhoc)
443                config_get bssid "$vif" bssid
444                config_get ssid "$vif" ssid
445                config_get beacon_int "$device" beacon_int
446                config_get basic_rate_list "$device" basic_rate
447                config_get encryption "$vif" encryption
448                config_get key "$vif" key 1
449                config_get mcast_rate "$vif" mcast_rate
450                config_get htmode "$device" htmode
451                case "$htmode" in
452                    HT20|HT40+|HT40-) ;;
453                    *) htmode= ;;
454                esac
455
456
457                local keyspec=""
458                [ "$encryption" == "psk" -o "$encryption" == "psk2" ] && {
459                    if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
460                        wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" $freq $htmode || {
461                            echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
462                            # make sure this wifi interface won't accidentally stay open without encryption
463                            ifconfig "$ifname" down
464                        }
465                        # wpa_supplicant will bring the iface up
466                        continue
467                    fi
468                }
469
470                [ "$encryption" == "wep" ] && {
471                    case "$key" in
472                        [1234])
473                            local idx
474                            for idx in 1 2 3 4; do
475                                local ikey
476                                config_get ikey "$vif" "key$idx"
477
478                                [ -n "$ikey" ] && {
479                                    ikey="$(($idx - 1)):$(prepare_key_wep "$ikey")"
480                                    [ $idx -eq $key ] && ikey="d:$ikey"
481                                    append keyspec "$ikey"
482                                }
483                            done
484                        ;;
485                        *) append keyspec "d:0:$(prepare_key_wep "$key")" ;;
486                    esac
487                }
488
489                local br brval brsub brstr
490                [ -n "$basic_rate_list" ] && {
491                    for br in $basic_rate_list; do
492                        brval="$(($br / 1000))"
493                        brsub="$((($br / 100) % 10))"
494                        [ "$brsub" -gt 0 ] && brval="$brval.$brsub"
495                        [ -n "$brstr" ] && brstr="$brstr,"
496                        brstr="$brstr$brval"
497                    done
498                }
499
500                local mcval=""
501                [ -n "$mcast_rate" ] && {
502                    mcval="$(($mcast_rate / 1000))"
503                    mcsub="$(( ($mcast_rate / 100) % 10 ))"
504                    [ "$mcsub" -gt 0 ] && mcval="$mcval.$mcsub"
505                }
506
507                iw dev "$ifname" ibss join "$ssid" $freq $htmode \
508                    ${fixed:+fixed-freq} $bssid \
509                    ${beacon_int:+beacon-interval $beacon_int} \
510                    ${brstr:+basic-rates $brstr} \
511                    ${mcval:+mcast-rate $mcval} \
512                    ${keyspec:+keys $keyspec}
513            ;;
514            sta)
515                if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
516                    wpa_supplicant_setup_vif "$vif" nl80211 "${hostapd_ctrl:+-H $hostapd_ctrl}" || {
517                        echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
518                        # make sure this wifi interface won't accidentally stay open without encryption
519                        ifconfig "$ifname" down
520                        continue
521                    }
522                fi
523            ;;
524        esac
525        [ "$mode" = "ap" ] || mac80211_start_vif "$vif" "$ifname"
526    done
527
528}
529
530
531check_mac80211_device() {
532    config_get phy "$1" phy
533    [ -z "$phy" ] && {
534        find_mac80211_phy "$1" >/dev/null || return 0
535        config_get phy "$1" phy
536    }
537    [ "$phy" = "$dev" ] && found=1
538}
539
540detect_mac80211() {
541    devidx=0
542    config_load wireless
543    while :; do
544        config_get type "radio$devidx" type
545        [ -n "$type" ] || break
546        devidx=$(($devidx + 1))
547    done
548    for dev in $(ls /sys/class/ieee80211); do
549        found=0
550        config_foreach check_mac80211_device wifi-device
551        [ "$found" -gt 0 ] && continue
552
553        mode_11n=""
554        mode_band="g"
555        channel="11"
556        ht_cap=0
557        for cap in $(iw phy "$dev" info | grep 'Capabilities:' | cut -d: -f2); do
558            ht_cap="$(($ht_cap | $cap))"
559        done
560        ht_capab="";
561        [ "$ht_cap" -gt 0 ] && {
562            mode_11n="n"
563            append ht_capab " option htmode HT20" "$N"
564
565            list=" list ht_capab"
566            [ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list LDPC" "$N"
567            [ "$(($ht_cap & 16))" -eq 16 ] && append ht_capab "$list GF" "$N"
568            [ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list SHORT-GI-20" "$N"
569            [ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list SHORT-GI-40" "$N"
570            [ "$(($ht_cap & 128))" -eq 128 ] && append ht_capab "$list TX-STBC" "$N"
571            [ "$(($ht_cap & 768))" -eq 256 ] && append ht_capab "$list RX-STBC1" "$N"
572            [ "$(($ht_cap & 768))" -eq 512 ] && append ht_capab "$list RX-STBC12" "$N"
573            [ "$(($ht_cap & 768))" -eq 768 ] && append ht_capab "$list RX-STBC123" "$N"
574            [ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list DSSS_CCK-40" "$N"
575        }
576        iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }
577
578        if [ -x /usr/bin/readlink ]; then
579            path="$(readlink -f /sys/class/ieee80211/${dev}/device)"
580            path="${path##/sys/devices/}"
581            dev_id=" option path '$path'"
582        else
583            dev_id=" option macaddr $(cat /sys/class/ieee80211/${dev}/macaddress)"
584        fi
585
586        cat <<EOF
587config wifi-device radio$devidx
588    option type mac80211
589    option channel ${channel}
590    option hwmode 11${mode_11n}${mode_band}
591$dev_id
592$ht_capab
593    # REMOVE THIS LINE TO ENABLE WIFI:
594    option disabled 1
595
596config wifi-iface
597    option device radio$devidx
598    option network lan
599    option mode ap
600    option ssid OpenWrt
601    option encryption none
602
603EOF
604    devidx=$(($devidx + 1))
605    done
606}
607
608

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