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c2d1560a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * utilities for mac80211 | |
12 | */ | |
13 | ||
14 | #include <net/mac80211.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/if_arp.h> | |
21 | #include <linux/wireless.h> | |
22 | #include <linux/bitmap.h> | |
881d966b | 23 | #include <net/net_namespace.h> |
c2d1560a | 24 | #include <net/cfg80211.h> |
dabeb344 | 25 | #include <net/rtnetlink.h> |
c2d1560a JB |
26 | |
27 | #include "ieee80211_i.h" | |
2c8dccc7 | 28 | #include "rate.h" |
ee385855 | 29 | #include "mesh.h" |
c2d1560a JB |
30 | #include "wme.h" |
31 | ||
32 | /* privid for wiphys to determine whether they belong to us or not */ | |
33 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
34 | ||
35 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
36 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
c97c23e3 | 37 | const unsigned char rfc1042_header[] __aligned(2) = |
c2d1560a JB |
38 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
39 | ||
40 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
c97c23e3 | 41 | const unsigned char bridge_tunnel_header[] __aligned(2) = |
c2d1560a JB |
42 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
43 | ||
c2d1560a | 44 | |
71364716 | 45 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
05c914fe | 46 | enum nl80211_iftype type) |
c2d1560a | 47 | { |
a494bb1c | 48 | __le16 fc = hdr->frame_control; |
c2d1560a | 49 | |
98f0b0a3 RR |
50 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
51 | if (len < 16) | |
c2d1560a JB |
52 | return NULL; |
53 | ||
a494bb1c | 54 | if (ieee80211_is_data(fc)) { |
98f0b0a3 RR |
55 | if (len < 24) /* drop incorrect hdr len (data) */ |
56 | return NULL; | |
a494bb1c HH |
57 | |
58 | if (ieee80211_has_a4(fc)) | |
c2d1560a | 59 | return NULL; |
a494bb1c HH |
60 | if (ieee80211_has_tods(fc)) |
61 | return hdr->addr1; | |
62 | if (ieee80211_has_fromds(fc)) | |
c2d1560a | 63 | return hdr->addr2; |
a494bb1c HH |
64 | |
65 | return hdr->addr3; | |
66 | } | |
67 | ||
68 | if (ieee80211_is_mgmt(fc)) { | |
98f0b0a3 RR |
69 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
70 | return NULL; | |
c2d1560a | 71 | return hdr->addr3; |
a494bb1c HH |
72 | } |
73 | ||
74 | if (ieee80211_is_ctl(fc)) { | |
75 | if(ieee80211_is_pspoll(fc)) | |
c2d1560a | 76 | return hdr->addr1; |
a494bb1c HH |
77 | |
78 | if (ieee80211_is_back_req(fc)) { | |
71364716 | 79 | switch (type) { |
05c914fe | 80 | case NL80211_IFTYPE_STATION: |
71364716 | 81 | return hdr->addr2; |
05c914fe JB |
82 | case NL80211_IFTYPE_AP: |
83 | case NL80211_IFTYPE_AP_VLAN: | |
71364716 RR |
84 | return hdr->addr1; |
85 | default: | |
a494bb1c | 86 | break; /* fall through to the return */ |
71364716 RR |
87 | } |
88 | } | |
c2d1560a JB |
89 | } |
90 | ||
91 | return NULL; | |
92 | } | |
93 | ||
6693be71 HH |
94 | unsigned int ieee80211_hdrlen(__le16 fc) |
95 | { | |
96 | unsigned int hdrlen = 24; | |
97 | ||
98 | if (ieee80211_is_data(fc)) { | |
99 | if (ieee80211_has_a4(fc)) | |
100 | hdrlen = 30; | |
101 | if (ieee80211_is_data_qos(fc)) | |
102 | hdrlen += IEEE80211_QOS_CTL_LEN; | |
103 | goto out; | |
104 | } | |
105 | ||
106 | if (ieee80211_is_ctl(fc)) { | |
107 | /* | |
108 | * ACK and CTS are 10 bytes, all others 16. To see how | |
109 | * to get this condition consider | |
110 | * subtype mask: 0b0000000011110000 (0x00F0) | |
111 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
112 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
113 | * bits that matter: ^^^ (0x00E0) | |
114 | * value of those: 0b0000000011000000 (0x00C0) | |
115 | */ | |
116 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
117 | hdrlen = 10; | |
118 | else | |
119 | hdrlen = 16; | |
120 | } | |
121 | out: | |
122 | return hdrlen; | |
123 | } | |
124 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
125 | ||
c9c6950c | 126 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) |
c2d1560a | 127 | { |
c9c6950c HH |
128 | const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data; |
129 | unsigned int hdrlen; | |
c2d1560a JB |
130 | |
131 | if (unlikely(skb->len < 10)) | |
132 | return 0; | |
c9c6950c | 133 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
c2d1560a JB |
134 | if (unlikely(hdrlen > skb->len)) |
135 | return 0; | |
136 | return hdrlen; | |
137 | } | |
138 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
139 | ||
ee385855 LCC |
140 | int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
141 | { | |
142 | int ae = meshhdr->flags & IEEE80211S_FLAGS_AE; | |
143 | /* 7.1.3.5a.2 */ | |
144 | switch (ae) { | |
145 | case 0: | |
ef269254 | 146 | return 6; |
ee385855 | 147 | case 1: |
ef269254 | 148 | return 12; |
ee385855 | 149 | case 2: |
ef269254 | 150 | return 18; |
ee385855 | 151 | case 3: |
ef269254 | 152 | return 24; |
ee385855 | 153 | default: |
ef269254 | 154 | return 6; |
ee385855 LCC |
155 | } |
156 | } | |
ee385855 | 157 | |
5cf121c3 | 158 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
c2d1560a JB |
159 | { |
160 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
161 | ||
162 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
5cf121c3 | 163 | if (tx->extra_frag) { |
c2d1560a JB |
164 | struct ieee80211_hdr *fhdr; |
165 | int i; | |
5cf121c3 | 166 | for (i = 0; i < tx->num_extra_frag; i++) { |
c2d1560a | 167 | fhdr = (struct ieee80211_hdr *) |
5cf121c3 | 168 | tx->extra_frag[i]->data; |
c2d1560a JB |
169 | fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
170 | } | |
171 | } | |
172 | } | |
173 | ||
174 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
175 | int rate, int erp, int short_preamble) | |
176 | { | |
177 | int dur; | |
178 | ||
179 | /* calculate duration (in microseconds, rounded up to next higher | |
180 | * integer if it includes a fractional microsecond) to send frame of | |
181 | * len bytes (does not include FCS) at the given rate. Duration will | |
182 | * also include SIFS. | |
183 | * | |
184 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
185 | * DIV_ROUND_UP() operations. | |
186 | */ | |
187 | ||
8318d78a | 188 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { |
c2d1560a JB |
189 | /* |
190 | * OFDM: | |
191 | * | |
192 | * N_DBPS = DATARATE x 4 | |
193 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
194 | * (16 = SIGNAL time, 6 = tail bits) | |
195 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
196 | * | |
197 | * T_SYM = 4 usec | |
198 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
199 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
200 | * signal ext = 6 usec | |
201 | */ | |
c2d1560a JB |
202 | dur = 16; /* SIFS + signal ext */ |
203 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
204 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
205 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
206 | 4 * rate); /* T_SYM x N_SYM */ | |
207 | } else { | |
208 | /* | |
209 | * 802.11b or 802.11g with 802.11b compatibility: | |
210 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
211 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
212 | * | |
213 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
214 | * aSIFSTime = 10 usec | |
215 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
216 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
217 | */ | |
218 | dur = 10; /* aSIFSTime = 10 usec */ | |
219 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
220 | ||
221 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
222 | } | |
223 | ||
224 | return dur; | |
225 | } | |
226 | ||
227 | /* Exported duration function for driver use */ | |
32bfd35d JB |
228 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
229 | struct ieee80211_vif *vif, | |
8318d78a JB |
230 | size_t frame_len, |
231 | struct ieee80211_rate *rate) | |
c2d1560a JB |
232 | { |
233 | struct ieee80211_local *local = hw_to_local(hw); | |
25d834e1 | 234 | struct ieee80211_sub_if_data *sdata; |
c2d1560a JB |
235 | u16 dur; |
236 | int erp; | |
25d834e1 | 237 | bool short_preamble = false; |
c2d1560a | 238 | |
8318d78a | 239 | erp = 0; |
25d834e1 JB |
240 | if (vif) { |
241 | sdata = vif_to_sdata(vif); | |
bda3933a | 242 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
243 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
244 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
245 | } | |
8318d78a JB |
246 | |
247 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, | |
25d834e1 | 248 | short_preamble); |
c2d1560a JB |
249 | |
250 | return cpu_to_le16(dur); | |
251 | } | |
252 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
253 | ||
32bfd35d JB |
254 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
255 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 256 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
257 | { |
258 | struct ieee80211_local *local = hw_to_local(hw); | |
259 | struct ieee80211_rate *rate; | |
25d834e1 | 260 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 261 | bool short_preamble; |
c2d1560a JB |
262 | int erp; |
263 | u16 dur; | |
2e92e6f2 JB |
264 | struct ieee80211_supported_band *sband; |
265 | ||
266 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 267 | |
25d834e1 | 268 | short_preamble = false; |
7e9ed188 | 269 | |
e039fa4a | 270 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
271 | |
272 | erp = 0; | |
25d834e1 JB |
273 | if (vif) { |
274 | sdata = vif_to_sdata(vif); | |
bda3933a | 275 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
276 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
277 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
278 | } | |
c2d1560a JB |
279 | |
280 | /* CTS duration */ | |
8318d78a | 281 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
282 | erp, short_preamble); |
283 | /* Data frame duration */ | |
8318d78a | 284 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a JB |
285 | erp, short_preamble); |
286 | /* ACK duration */ | |
8318d78a | 287 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
288 | erp, short_preamble); |
289 | ||
290 | return cpu_to_le16(dur); | |
291 | } | |
292 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
293 | ||
32bfd35d JB |
294 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
295 | struct ieee80211_vif *vif, | |
c2d1560a | 296 | size_t frame_len, |
e039fa4a | 297 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
298 | { |
299 | struct ieee80211_local *local = hw_to_local(hw); | |
300 | struct ieee80211_rate *rate; | |
25d834e1 | 301 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 302 | bool short_preamble; |
c2d1560a JB |
303 | int erp; |
304 | u16 dur; | |
2e92e6f2 JB |
305 | struct ieee80211_supported_band *sband; |
306 | ||
307 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 308 | |
25d834e1 | 309 | short_preamble = false; |
7e9ed188 | 310 | |
e039fa4a | 311 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a | 312 | erp = 0; |
25d834e1 JB |
313 | if (vif) { |
314 | sdata = vif_to_sdata(vif); | |
bda3933a | 315 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
316 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
317 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
318 | } | |
c2d1560a JB |
319 | |
320 | /* Data frame duration */ | |
8318d78a | 321 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a | 322 | erp, short_preamble); |
e039fa4a | 323 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 324 | /* ACK duration */ |
8318d78a | 325 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
326 | erp, short_preamble); |
327 | } | |
328 | ||
329 | return cpu_to_le16(dur); | |
330 | } | |
331 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
332 | ||
ce7c9111 KV |
333 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
334 | enum queue_stop_reason reason) | |
c2d1560a JB |
335 | { |
336 | struct ieee80211_local *local = hw_to_local(hw); | |
337 | ||
ce7c9111 KV |
338 | /* we don't need to track ampdu queues */ |
339 | if (queue < ieee80211_num_regular_queues(hw)) { | |
340 | __clear_bit(reason, &local->queue_stop_reasons[queue]); | |
341 | ||
342 | if (local->queue_stop_reasons[queue] != 0) | |
343 | /* someone still has this queue stopped */ | |
344 | return; | |
345 | } | |
346 | ||
e2530083 | 347 | if (test_bit(queue, local->queues_pending)) { |
f8e79ddd | 348 | set_bit(queue, local->queues_pending_run); |
e2530083 JB |
349 | tasklet_schedule(&local->tx_pending_tasklet); |
350 | } else { | |
51cb6db0 | 351 | netif_wake_subqueue(local->mdev, queue); |
c2d1560a JB |
352 | } |
353 | } | |
ce7c9111 KV |
354 | |
355 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, | |
356 | enum queue_stop_reason reason) | |
357 | { | |
358 | struct ieee80211_local *local = hw_to_local(hw); | |
359 | unsigned long flags; | |
360 | ||
361 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
362 | __ieee80211_wake_queue(hw, queue, reason); | |
363 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
364 | } | |
365 | ||
366 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
367 | { | |
368 | ieee80211_wake_queue_by_reason(hw, queue, | |
369 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
370 | } | |
c2d1560a JB |
371 | EXPORT_SYMBOL(ieee80211_wake_queue); |
372 | ||
ce7c9111 KV |
373 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
374 | enum queue_stop_reason reason) | |
c2d1560a JB |
375 | { |
376 | struct ieee80211_local *local = hw_to_local(hw); | |
377 | ||
ce7c9111 KV |
378 | /* we don't need to track ampdu queues */ |
379 | if (queue < ieee80211_num_regular_queues(hw)) | |
380 | __set_bit(reason, &local->queue_stop_reasons[queue]); | |
381 | ||
51cb6db0 | 382 | netif_stop_subqueue(local->mdev, queue); |
c2d1560a | 383 | } |
ce7c9111 KV |
384 | |
385 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, | |
386 | enum queue_stop_reason reason) | |
387 | { | |
388 | struct ieee80211_local *local = hw_to_local(hw); | |
389 | unsigned long flags; | |
390 | ||
391 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
392 | __ieee80211_stop_queue(hw, queue, reason); | |
393 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
394 | } | |
395 | ||
396 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
397 | { | |
398 | ieee80211_stop_queue_by_reason(hw, queue, | |
399 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
400 | } | |
c2d1560a JB |
401 | EXPORT_SYMBOL(ieee80211_stop_queue); |
402 | ||
ce7c9111 KV |
403 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
404 | enum queue_stop_reason reason) | |
c2d1560a | 405 | { |
ce7c9111 KV |
406 | struct ieee80211_local *local = hw_to_local(hw); |
407 | unsigned long flags; | |
c2d1560a JB |
408 | int i; |
409 | ||
ce7c9111 KV |
410 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
411 | ||
e2530083 | 412 | for (i = 0; i < ieee80211_num_queues(hw); i++) |
ce7c9111 KV |
413 | __ieee80211_stop_queue(hw, i, reason); |
414 | ||
415 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
416 | } | |
417 | ||
418 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
419 | { | |
420 | ieee80211_stop_queues_by_reason(hw, | |
421 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
422 | } |
423 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
424 | ||
92ab8535 TW |
425 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
426 | { | |
427 | struct ieee80211_local *local = hw_to_local(hw); | |
428 | return __netif_subqueue_stopped(local->mdev, queue); | |
429 | } | |
430 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
431 | ||
ce7c9111 KV |
432 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
433 | enum queue_stop_reason reason) | |
c2d1560a | 434 | { |
ce7c9111 KV |
435 | struct ieee80211_local *local = hw_to_local(hw); |
436 | unsigned long flags; | |
c2d1560a JB |
437 | int i; |
438 | ||
ce7c9111 KV |
439 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
440 | ||
c4680470 | 441 | for (i = 0; i < hw->queues + hw->ampdu_queues; i++) |
ce7c9111 KV |
442 | __ieee80211_wake_queue(hw, i, reason); |
443 | ||
444 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
445 | } | |
446 | ||
447 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
448 | { | |
449 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
450 | } |
451 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 452 | |
32bfd35d JB |
453 | void ieee80211_iterate_active_interfaces( |
454 | struct ieee80211_hw *hw, | |
455 | void (*iterator)(void *data, u8 *mac, | |
456 | struct ieee80211_vif *vif), | |
457 | void *data) | |
dabeb344 JB |
458 | { |
459 | struct ieee80211_local *local = hw_to_local(hw); | |
460 | struct ieee80211_sub_if_data *sdata; | |
461 | ||
2f561feb ID |
462 | rtnl_lock(); |
463 | ||
464 | list_for_each_entry(sdata, &local->interfaces, list) { | |
465 | switch (sdata->vif.type) { | |
05c914fe JB |
466 | case __NL80211_IFTYPE_AFTER_LAST: |
467 | case NL80211_IFTYPE_UNSPECIFIED: | |
468 | case NL80211_IFTYPE_MONITOR: | |
469 | case NL80211_IFTYPE_AP_VLAN: | |
2f561feb | 470 | continue; |
05c914fe JB |
471 | case NL80211_IFTYPE_AP: |
472 | case NL80211_IFTYPE_STATION: | |
473 | case NL80211_IFTYPE_ADHOC: | |
474 | case NL80211_IFTYPE_WDS: | |
475 | case NL80211_IFTYPE_MESH_POINT: | |
2f561feb ID |
476 | break; |
477 | } | |
2f561feb ID |
478 | if (netif_running(sdata->dev)) |
479 | iterator(data, sdata->dev->dev_addr, | |
480 | &sdata->vif); | |
481 | } | |
482 | ||
483 | rtnl_unlock(); | |
484 | } | |
485 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
486 | ||
487 | void ieee80211_iterate_active_interfaces_atomic( | |
488 | struct ieee80211_hw *hw, | |
489 | void (*iterator)(void *data, u8 *mac, | |
490 | struct ieee80211_vif *vif), | |
491 | void *data) | |
492 | { | |
493 | struct ieee80211_local *local = hw_to_local(hw); | |
494 | struct ieee80211_sub_if_data *sdata; | |
495 | ||
e38bad47 | 496 | rcu_read_lock(); |
dabeb344 | 497 | |
e38bad47 | 498 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 499 | switch (sdata->vif.type) { |
05c914fe JB |
500 | case __NL80211_IFTYPE_AFTER_LAST: |
501 | case NL80211_IFTYPE_UNSPECIFIED: | |
502 | case NL80211_IFTYPE_MONITOR: | |
503 | case NL80211_IFTYPE_AP_VLAN: | |
dabeb344 | 504 | continue; |
05c914fe JB |
505 | case NL80211_IFTYPE_AP: |
506 | case NL80211_IFTYPE_STATION: | |
507 | case NL80211_IFTYPE_ADHOC: | |
508 | case NL80211_IFTYPE_WDS: | |
509 | case NL80211_IFTYPE_MESH_POINT: | |
dabeb344 JB |
510 | break; |
511 | } | |
dabeb344 JB |
512 | if (netif_running(sdata->dev)) |
513 | iterator(data, sdata->dev->dev_addr, | |
32bfd35d | 514 | &sdata->vif); |
dabeb344 | 515 | } |
e38bad47 JB |
516 | |
517 | rcu_read_unlock(); | |
dabeb344 | 518 | } |
2f561feb | 519 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
37ffc8da JB |
520 | |
521 | void ieee802_11_parse_elems(u8 *start, size_t len, | |
522 | struct ieee802_11_elems *elems) | |
523 | { | |
524 | size_t left = len; | |
525 | u8 *pos = start; | |
526 | ||
527 | memset(elems, 0, sizeof(*elems)); | |
528 | elems->ie_start = start; | |
529 | elems->total_len = len; | |
530 | ||
531 | while (left >= 2) { | |
532 | u8 id, elen; | |
533 | ||
534 | id = *pos++; | |
535 | elen = *pos++; | |
536 | left -= 2; | |
537 | ||
538 | if (elen > left) | |
539 | return; | |
540 | ||
541 | switch (id) { | |
542 | case WLAN_EID_SSID: | |
543 | elems->ssid = pos; | |
544 | elems->ssid_len = elen; | |
545 | break; | |
546 | case WLAN_EID_SUPP_RATES: | |
547 | elems->supp_rates = pos; | |
548 | elems->supp_rates_len = elen; | |
549 | break; | |
550 | case WLAN_EID_FH_PARAMS: | |
551 | elems->fh_params = pos; | |
552 | elems->fh_params_len = elen; | |
553 | break; | |
554 | case WLAN_EID_DS_PARAMS: | |
555 | elems->ds_params = pos; | |
556 | elems->ds_params_len = elen; | |
557 | break; | |
558 | case WLAN_EID_CF_PARAMS: | |
559 | elems->cf_params = pos; | |
560 | elems->cf_params_len = elen; | |
561 | break; | |
562 | case WLAN_EID_TIM: | |
563 | elems->tim = pos; | |
564 | elems->tim_len = elen; | |
565 | break; | |
566 | case WLAN_EID_IBSS_PARAMS: | |
567 | elems->ibss_params = pos; | |
568 | elems->ibss_params_len = elen; | |
569 | break; | |
570 | case WLAN_EID_CHALLENGE: | |
571 | elems->challenge = pos; | |
572 | elems->challenge_len = elen; | |
573 | break; | |
574 | case WLAN_EID_WPA: | |
575 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
576 | pos[2] == 0xf2) { | |
577 | /* Microsoft OUI (00:50:F2) */ | |
578 | if (pos[3] == 1) { | |
579 | /* OUI Type 1 - WPA IE */ | |
580 | elems->wpa = pos; | |
581 | elems->wpa_len = elen; | |
582 | } else if (elen >= 5 && pos[3] == 2) { | |
583 | if (pos[4] == 0) { | |
584 | elems->wmm_info = pos; | |
585 | elems->wmm_info_len = elen; | |
586 | } else if (pos[4] == 1) { | |
587 | elems->wmm_param = pos; | |
588 | elems->wmm_param_len = elen; | |
589 | } | |
590 | } | |
591 | } | |
592 | break; | |
593 | case WLAN_EID_RSN: | |
594 | elems->rsn = pos; | |
595 | elems->rsn_len = elen; | |
596 | break; | |
597 | case WLAN_EID_ERP_INFO: | |
598 | elems->erp_info = pos; | |
599 | elems->erp_info_len = elen; | |
600 | break; | |
601 | case WLAN_EID_EXT_SUPP_RATES: | |
602 | elems->ext_supp_rates = pos; | |
603 | elems->ext_supp_rates_len = elen; | |
604 | break; | |
605 | case WLAN_EID_HT_CAPABILITY: | |
09914813 JB |
606 | if (elen >= sizeof(struct ieee80211_ht_cap)) |
607 | elems->ht_cap_elem = (void *)pos; | |
37ffc8da | 608 | break; |
d9fe60de JB |
609 | case WLAN_EID_HT_INFORMATION: |
610 | if (elen >= sizeof(struct ieee80211_ht_info)) | |
09914813 | 611 | elems->ht_info_elem = (void *)pos; |
37ffc8da JB |
612 | break; |
613 | case WLAN_EID_MESH_ID: | |
614 | elems->mesh_id = pos; | |
615 | elems->mesh_id_len = elen; | |
616 | break; | |
617 | case WLAN_EID_MESH_CONFIG: | |
618 | elems->mesh_config = pos; | |
619 | elems->mesh_config_len = elen; | |
620 | break; | |
621 | case WLAN_EID_PEER_LINK: | |
622 | elems->peer_link = pos; | |
623 | elems->peer_link_len = elen; | |
624 | break; | |
625 | case WLAN_EID_PREQ: | |
626 | elems->preq = pos; | |
627 | elems->preq_len = elen; | |
628 | break; | |
629 | case WLAN_EID_PREP: | |
630 | elems->prep = pos; | |
631 | elems->prep_len = elen; | |
632 | break; | |
633 | case WLAN_EID_PERR: | |
634 | elems->perr = pos; | |
635 | elems->perr_len = elen; | |
636 | break; | |
637 | case WLAN_EID_CHANNEL_SWITCH: | |
638 | elems->ch_switch_elem = pos; | |
639 | elems->ch_switch_elem_len = elen; | |
640 | break; | |
641 | case WLAN_EID_QUIET: | |
642 | if (!elems->quiet_elem) { | |
643 | elems->quiet_elem = pos; | |
644 | elems->quiet_elem_len = elen; | |
645 | } | |
646 | elems->num_of_quiet_elem++; | |
647 | break; | |
648 | case WLAN_EID_COUNTRY: | |
649 | elems->country_elem = pos; | |
650 | elems->country_elem_len = elen; | |
651 | break; | |
652 | case WLAN_EID_PWR_CONSTRAINT: | |
653 | elems->pwr_constr_elem = pos; | |
654 | elems->pwr_constr_elem_len = elen; | |
655 | break; | |
656 | default: | |
657 | break; | |
658 | } | |
659 | ||
660 | left -= elen; | |
661 | pos += elen; | |
662 | } | |
663 | } | |
5825fe10 JB |
664 | |
665 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) | |
666 | { | |
667 | struct ieee80211_local *local = sdata->local; | |
668 | struct ieee80211_tx_queue_params qparam; | |
669 | int i; | |
670 | ||
671 | if (!local->ops->conf_tx) | |
672 | return; | |
673 | ||
674 | memset(&qparam, 0, sizeof(qparam)); | |
675 | ||
676 | qparam.aifs = 2; | |
677 | ||
678 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
679 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)) | |
680 | qparam.cw_min = 31; | |
681 | else | |
682 | qparam.cw_min = 15; | |
683 | ||
684 | qparam.cw_max = 1023; | |
685 | qparam.txop = 0; | |
686 | ||
687 | for (i = 0; i < local_to_hw(local)->queues; i++) | |
688 | local->ops->conf_tx(local_to_hw(local), i, &qparam); | |
689 | } | |
e50db65c JB |
690 | |
691 | void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, | |
692 | int encrypt) | |
693 | { | |
694 | skb->dev = sdata->local->mdev; | |
695 | skb_set_mac_header(skb, 0); | |
696 | skb_set_network_header(skb, 0); | |
697 | skb_set_transport_header(skb, 0); | |
698 | ||
699 | skb->iif = sdata->dev->ifindex; | |
700 | skb->do_not_encrypt = !encrypt; | |
701 | ||
702 | dev_queue_xmit(skb); | |
703 | } | |
e16751c3 JB |
704 | |
705 | int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz) | |
706 | { | |
707 | int ret = -EINVAL; | |
708 | struct ieee80211_channel *chan; | |
709 | struct ieee80211_local *local = sdata->local; | |
710 | ||
711 | chan = ieee80211_get_channel(local->hw.wiphy, freqMHz); | |
712 | ||
713 | if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { | |
05c914fe | 714 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
d73782fd | 715 | chan->flags & IEEE80211_CHAN_NO_IBSS) |
e16751c3 | 716 | return ret; |
e16751c3 | 717 | local->oper_channel = chan; |
094d05dc | 718 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e16751c3 | 719 | |
c2b13452 | 720 | if (local->sw_scanning || local->hw_scanning) |
e16751c3 JB |
721 | ret = 0; |
722 | else | |
e8975581 JB |
723 | ret = ieee80211_hw_config( |
724 | local, IEEE80211_CONF_CHANGE_CHANNEL); | |
e16751c3 JB |
725 | } |
726 | ||
727 | return ret; | |
728 | } | |
96dd22ac JB |
729 | |
730 | u64 ieee80211_mandatory_rates(struct ieee80211_local *local, | |
731 | enum ieee80211_band band) | |
732 | { | |
733 | struct ieee80211_supported_band *sband; | |
734 | struct ieee80211_rate *bitrates; | |
735 | u64 mandatory_rates; | |
736 | enum ieee80211_rate_flags mandatory_flag; | |
737 | int i; | |
738 | ||
739 | sband = local->hw.wiphy->bands[band]; | |
740 | if (!sband) { | |
741 | WARN_ON(1); | |
742 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
743 | } | |
744 | ||
745 | if (band == IEEE80211_BAND_2GHZ) | |
746 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
747 | else | |
748 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
749 | ||
750 | bitrates = sband->bitrates; | |
751 | mandatory_rates = 0; | |
752 | for (i = 0; i < sband->n_bitrates; i++) | |
753 | if (bitrates[i].flags & mandatory_flag) | |
754 | mandatory_rates |= BIT(i); | |
755 | return mandatory_rates; | |
756 | } |