aboutsummaryrefslogtreecommitdiffstats
path: root/package/mac80211/files/lib/wifi/mac80211.sh
blob: bc6cc1449a441385292767033e95fafdb7ee6b63 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
#!/bin/sh
append DRIVERS "mac80211"

find_mac80211_phy() {
	config_get device "$1"

	local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
	config_get phy "$device" phy
	[ -z "$phy" -a -n "$macaddr" ] && {
		for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
			[ "$macaddr" = "$(cat /sys/class/ieee80211/${phy}/macaddress)" ] || continue
			config_set "$device" phy "$phy"
			break
		done
		config_get phy "$device" phy
	}
	[ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
		echo "PHY for wifi device $1 not found"
		return 1
	}
	[ -z "$macaddr" ] && {
		config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
	}
	return 0
}

scan_mac80211() {
	local device="$1"
	local adhoc sta ap monitor mesh

	config_get vifs "$device" vifs
	for vif in $vifs; do
		config_get mode "$vif" mode
		case "$mode" in
			adhoc|sta|ap|monitor|mesh)
				append $mode "$vif"
			;;
			*) echo "$device($vif): Invalid mode, ignored."; continue;;
		esac
	done

	config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${sta:+$sta }${monitor:+$monitor }${mesh:+$mesh}"
}


disable_mac80211() (
	local device="$1"

	find_mac80211_phy "$device" || return 0
	config_get phy "$device" phy

	set_wifi_down "$device"
	# kill all running hostapd and wpa_supplicant processes that
	# are running on atheros/mac80211 vifs
	for pid in `pidof hostapd wpa_supplicant`; do
		grep wlan /proc/$pid/cmdline >/dev/null && \
			kill $pid
	done

	include /lib/network
	for wdev in $(ls /sys/class/ieee80211/${phy}/device/net 2>/dev/null); do
		ifconfig "$wdev" down 2>/dev/null
		unbridge "$dev"
		iw dev "$wdev" del
	done

	return 0
)
get_freq() {
	local phy="$1"
	local chan="$2"
	iw "$phy" info | grep -E -m1 "(\* ${chan:-....} MHz${chan:+|\\[$chan\\]})" | grep MHz | awk '{print $2}'
}
enable_mac80211() {
	local device="$1"
	config_get channel "$device" channel
	config_get vifs "$device" vifs
	config_get txpower "$device" txpower
	find_mac80211_phy "$device" || return 0
	config_get phy "$device" phy
	local i=0
	fixed=""

	[ "$channel" = "auto" -o "$channel" = "0" ] || {
		fixed=1
	}

	export channel fixed
	# convert channel to frequency
	local freq="$(get_freq "$phy" "${fixed:+$channel}")"

	wifi_fixup_hwmode "$device" "g"
	for vif in $vifs; do
		while [ -d "/sys/class/net/wlan$i" ]; do
			i=$(($i + 1))
		done

		config_get ifname "$vif" ifname
		[ -n "$ifname" ] || {
			ifname="wlan$i"
		}
		config_set "$vif" ifname "$ifname"

		config_get enc "$vif" encryption
		config_get mode "$vif" mode
		config_get ssid "$vif" ssid
		config_get_bool wds "$vif" wds 0

		# It is far easier to delete and create the desired interface
		case "$mode" in
			adhoc)
				iw phy "$phy" interface add "$ifname" type adhoc
			;;
			ap)
				# Hostapd will handle recreating the interface and
				# it's accompanying monitor
				iw phy "$phy" interface add "$ifname" type managed
			;;
			mesh)
				config_get mesh_id "$vif" mesh_id
				iw phy "$phy" interface add "$ifname" type mp mesh_id "$mesh_id"
			;;
			monitor)
				iw phy "$phy" interface add "$ifname" type monitor
			;;
			sta)
				local wdsflag
				[ "$wds" -gt 0 ] && wdsflag="4addr on"
				iw phy "$phy" interface add "$ifname" type managed $wdsflag
				config_get_bool powersave "$vif" powersave 0
				[ "$powersave" -gt 0 ] && powersave="on" || powersave="off"
				iwconfig "$ifname" power "$powersave"
			;;
		esac

		# All interfaces must have unique mac addresses
		# which can either be explicitly set in the device
		# section, or automatically generated
		config_get macaddr "$device" macaddr
		local mac_1="${macaddr%%:*}"
		local mac_2="${macaddr#*:}"

		config_get vif_mac "$vif" macaddr
		[ -n "$vif_mac" ] || {
			if [ "$i" -gt 0 ]; then
				offset="$(( 2 + $i * 4 ))"
			else
				offset="0"
			fi
			vif_mac="$( printf %02x $(($mac_1 + $offset)) ):$mac_2"
		}
		ifconfig "$ifname" hw ether "$vif_mac"

		# We attempt to set teh channel for all interfaces, although
		# mac80211 may not support it or the driver might not yet
		[ -n "$fixed" -a -n "$channel" ] && iw dev "$ifname" set channel "$channel"

		local key keystring

		# Valid values are:
		# wpa / wep / none
		#
		# !! ap !!
		#
		# ALL ap functionality will be passed to hostapd
		#
		# !! mesh / adhoc / station !!
		# none -> NO encryption
		#
		# wep + keymgmt = '' -> we use iw to connect to the
		# network.
		#
		# wep + keymgmt = 'NONE' -> wpa_supplicant will be
		# configured to handle the wep connection
		if [ ! "$mode" = "ap" ]; then
			case "$enc" in
				wep)
					config_get keymgmt "$vif" keymgmt
					if [ -e "$keymgmt" ]; then
						for idx in 1 2 3 4; do
							local zidx
							zidx = idx - 1
							config_get key "$vif" "key${idx}"
							if [ -n "$key" ]; then
								append keystring "${zidx}:${key} "
							fi
						done
					fi
				;;
				wpa)
					config_get key "$vif" key
				;;
			esac
		fi

		# txpower is not yet implemented in iw
		config_get vif_txpower "$vif" txpower
		# use vif_txpower (from wifi-iface) to override txpower (from
		# wifi-device) if the latter doesn't exist
		txpower="${txpower:-$vif_txpower}"
		[ -z "$txpower" ] || iwconfig "$ifname" txpower "${txpower%%.*}"

		config_get frag "$vif" frag
		if [ -n "$frag" ]; then
			iw phy "$phy" set frag "${frag%%.*}"
		fi

		config_get rts "$vif" rts
		if [ -n "$rts" ]; then
			iw phy "$phy" set rts "${frag%%.*}"
		fi

		ifconfig "$ifname" up

		local net_cfg bridge
		net_cfg="$(find_net_config "$vif")"
		[ -z "$net_cfg" ] || {
			bridge="$(bridge_interface "$net_cfg")"
			config_set "$vif" bridge "$bridge"
			start_net "$ifname" "$net_cfg"
		}

		set_wifi_up "$vif" "$ifname"
		case "$mode" in
			ap)
				if eval "type hostapd_setup_vif" 2>/dev/null >/dev/null; then
					hostapd_setup_vif "$vif" nl80211 || {
						echo "enable_mac80211($device): Failed to set up wpa for interface $ifname" >&2
						# make sure this wifi interface won't accidentally stay open without encryption
						ifconfig "$ifname" down
						continue
					}
				fi
			;;
			adhoc)
				config_get bssid "$vif" bssid
				iw dev "$ifname" ibss join "$ssid" $freq ${fixed:+fixed-freq} $bssid
			;;
			sta|mesh)
				config_get bssid "$vif" bssid
				case "$enc" in
					wep)
						if [ -e "$keymgmt" ]; then
							[ -n "$keystring" ] &&
								iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid key "$keystring"
						else
							if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
								wpa_supplicant_setup_vif "$vif" wext || {
									echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
									# make sure this wifi interface won't accidentally stay open without encryption
									ifconfig "$ifname" down
									continue
								}
							fi
						fi
					;;
					wpa*|psk*)
						config_get key "$vif" key
						if eval "type wpa_supplicant_setup_vif" 2>/dev/null >/dev/null; then
							wpa_supplicant_setup_vif "$vif" wext || {
								echo "enable_mac80211($device): Failed to set up wpa_supplicant for interface $ifname" >&2
								# make sure this wifi interface won't accidentally stay open without encryption
								ifconfig "$ifname" down
								continue
							}
						fi
					;;
					*)
						iw dev "$ifname" connect "$ssid" ${fixed:+$freq} $bssid
					;;
				esac

			;;
		esac
	done
}


check_device() {
	config_get phy "$1" phy
	[ -z "$phy" ] && {
		find_mac80211_phy "$1" || return 0
		config_get phy "$1" phy
	}
	[ "$phy" = "$dev" ] && found=1
}

detect_mac80211() {
	devidx=0
	config_load wireless
	while :; do
		config_get type "wifi$devidx" type
		[ -n "$type" ] || break
		devidx=$(($devidx + 1))
	done
	for dev in $(ls /sys/class/ieee80211); do
		found=0
		config_foreach check_device wifi-device
		[ "$found" -gt 0 ] && continue

		mode_11n=""
		mode_band="g"
		channel="5"
		ht_cap=0
		for cap in $(iw phy "$dev" info | grep 'HT capabilities' | cut -d: -f2); do
			ht_cap="$(($ht_cap | $cap))"
		done
		ht_capab="";
		[ "$ht_cap" -gt 0 ] && {
			mode_11n="n"
			list="	list ht_capab"
			[ "$(($ht_cap & 1))" -eq 1 ] && append ht_capab "$list	LDPC" "$N"
			[ "$(($ht_cap & 2))" -eq 2 ] && append ht_capab "$list	HT40-" "$N"
			[ "$(($ht_cap & 32))" -eq 32 ] && append ht_capab "$list	SHORT-GI-20" "$N"
			[ "$(($ht_cap & 64))" -eq 64 ] && append ht_capab "$list	SHORT-GI-40" "$N"
			[ "$(($ht_cap & 4096))" -eq 4096 ] && append ht_capab "$list	DSSS_CCK-40" "$N"
		}
		iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }

		cat <<EOF
config wifi-device  wifi$devidx
	option type     mac80211
	option channel  ${channel}
	option macaddr	$(cat /sys/class/ieee80211/${dev}/macaddress)
	option hwmode	11${mode_11n}${mode_band}
	# REMOVE THIS LINE TO ENABLE WIFI:
	option disabled 1
$ht_capab

config wifi-iface
	option device   wifi$devidx
	option network  lan
	option mode     ap
	option ssid     OpenWrt
	option encryption none

EOF
	devidx=$(($devidx + 1))
	done
}