1 /*
2 * Common hostapd/wpa_supplicant HW features
3 * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2015, Qualcomm Atheros, Inc.
5 *
6 * This software may be distributed under the terms of the BSD license.
7 * See README for more details.
8 */
9
10 #include "includes.h"
11
12 #include "common.h"
13 #include "defs.h"
14 #include "ieee802_11_defs.h"
15 #include "ieee802_11_common.h"
16 #include "hw_features_common.h"
17
18
hw_get_channel_chan(struct hostapd_hw_modes * mode,int chan,int * freq)19 struct hostapd_channel_data * hw_get_channel_chan(struct hostapd_hw_modes *mode,
20 int chan, int *freq)
21 {
22 int i;
23
24 if (freq)
25 *freq = 0;
26
27 if (!mode)
28 return NULL;
29
30 for (i = 0; i < mode->num_channels; i++) {
31 struct hostapd_channel_data *ch = &mode->channels[i];
32 if (ch->chan == chan) {
33 if (freq)
34 *freq = ch->freq;
35 return ch;
36 }
37 }
38
39 return NULL;
40 }
41
42
43 struct hostapd_channel_data *
hw_mode_get_channel(struct hostapd_hw_modes * mode,int freq,int * chan)44 hw_mode_get_channel(struct hostapd_hw_modes *mode, int freq, int *chan)
45 {
46 int i;
47
48 for (i = 0; i < mode->num_channels; i++) {
49 struct hostapd_channel_data *ch = &mode->channels[i];
50
51 if (ch->freq == freq) {
52 if (chan)
53 *chan = ch->chan;
54 return ch;
55 }
56 }
57
58 return NULL;
59 }
60
61
62 struct hostapd_channel_data *
hw_get_channel_freq(enum hostapd_hw_mode mode,int freq,int * chan,struct hostapd_hw_modes * hw_features,int num_hw_features)63 hw_get_channel_freq(enum hostapd_hw_mode mode, int freq, int *chan,
64 struct hostapd_hw_modes *hw_features, int num_hw_features)
65 {
66 struct hostapd_channel_data *chan_data;
67 int i;
68
69 if (chan)
70 *chan = 0;
71
72 if (!hw_features)
73 return NULL;
74
75 for (i = 0; i < num_hw_features; i++) {
76 struct hostapd_hw_modes *curr_mode = &hw_features[i];
77
78 if (curr_mode->mode != mode)
79 continue;
80
81 chan_data = hw_mode_get_channel(curr_mode, freq, chan);
82 if (chan_data)
83 return chan_data;
84 }
85
86 return NULL;
87 }
88
89
hw_get_freq(struct hostapd_hw_modes * mode,int chan)90 int hw_get_freq(struct hostapd_hw_modes *mode, int chan)
91 {
92 int freq;
93
94 hw_get_channel_chan(mode, chan, &freq);
95
96 return freq;
97 }
98
99
hw_get_chan(enum hostapd_hw_mode mode,int freq,struct hostapd_hw_modes * hw_features,int num_hw_features)100 int hw_get_chan(enum hostapd_hw_mode mode, int freq,
101 struct hostapd_hw_modes *hw_features, int num_hw_features)
102 {
103 int chan;
104
105 hw_get_channel_freq(mode, freq, &chan, hw_features, num_hw_features);
106
107 return chan;
108 }
109
110
allowed_ht40_channel_pair(enum hostapd_hw_mode mode,struct hostapd_channel_data * p_chan,struct hostapd_channel_data * s_chan)111 int allowed_ht40_channel_pair(enum hostapd_hw_mode mode,
112 struct hostapd_channel_data *p_chan,
113 struct hostapd_channel_data *s_chan)
114 {
115 int ok, first;
116 int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 140,
117 149, 157, 165, 173, 184, 192 };
118 size_t k;
119 int ht40_plus, pri_chan, sec_chan;
120
121 if (!p_chan || !s_chan)
122 return 0;
123 pri_chan = p_chan->chan;
124 sec_chan = s_chan->chan;
125
126 ht40_plus = pri_chan < sec_chan;
127
128 if (pri_chan == sec_chan || !sec_chan) {
129 if (chan_pri_allowed(p_chan))
130 return 1; /* HT40 not used */
131
132 wpa_printf(MSG_ERROR, "Channel %d is not allowed as primary",
133 pri_chan);
134 return 0;
135 }
136
137 wpa_printf(MSG_DEBUG,
138 "HT40: control channel: %d (%d MHz), secondary channel: %d (%d MHz)",
139 pri_chan, p_chan->freq, sec_chan, s_chan->freq);
140
141 /* Verify that HT40 secondary channel is an allowed 20 MHz
142 * channel */
143 if ((s_chan->flag & HOSTAPD_CHAN_DISABLED) ||
144 (ht40_plus && !(p_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P)) ||
145 (!ht40_plus && !(p_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40M))) {
146 wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed",
147 sec_chan);
148 return 0;
149 }
150
151 /*
152 * Verify that HT40 primary,secondary channel pair is allowed per
153 * IEEE 802.11n Annex J. This is only needed for 5 GHz band since
154 * 2.4 GHz rules allow all cases where the secondary channel fits into
155 * the list of allowed channels (already checked above).
156 */
157 if (mode != HOSTAPD_MODE_IEEE80211A)
158 return 1;
159
160 first = pri_chan < sec_chan ? pri_chan : sec_chan;
161
162 ok = 0;
163 for (k = 0; k < ARRAY_SIZE(allowed); k++) {
164 if (first == allowed[k]) {
165 ok = 1;
166 break;
167 }
168 }
169 if (!ok) {
170 wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed",
171 pri_chan, sec_chan);
172 return 0;
173 }
174
175 return 1;
176 }
177
178
get_pri_sec_chan(struct wpa_scan_res * bss,int * pri_chan,int * sec_chan)179 void get_pri_sec_chan(struct wpa_scan_res *bss, int *pri_chan, int *sec_chan)
180 {
181 struct ieee80211_ht_operation *oper;
182 struct ieee802_11_elems elems;
183
184 *pri_chan = *sec_chan = 0;
185
186 if (ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0) !=
187 ParseFailed && elems.ht_operation) {
188 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
189 *pri_chan = oper->primary_chan;
190 if (oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) {
191 int sec = oper->ht_param &
192 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
193 if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
194 *sec_chan = *pri_chan + 4;
195 else if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
196 *sec_chan = *pri_chan - 4;
197 }
198 }
199 }
200
201
check_40mhz_5g(struct wpa_scan_results * scan_res,struct hostapd_channel_data * pri_chan,struct hostapd_channel_data * sec_chan)202 int check_40mhz_5g(struct wpa_scan_results *scan_res,
203 struct hostapd_channel_data *pri_chan,
204 struct hostapd_channel_data *sec_chan)
205 {
206 int pri_bss, sec_bss;
207 int bss_pri_chan, bss_sec_chan;
208 size_t i;
209 int match;
210
211 if (!scan_res || !pri_chan || !sec_chan ||
212 pri_chan->freq == sec_chan->freq)
213 return 0;
214
215 /*
216 * Switch PRI/SEC channels if Beacons were detected on selected SEC
217 * channel, but not on selected PRI channel.
218 */
219 pri_bss = sec_bss = 0;
220 for (i = 0; i < scan_res->num; i++) {
221 struct wpa_scan_res *bss = scan_res->res[i];
222 if (bss->freq == pri_chan->freq)
223 pri_bss++;
224 else if (bss->freq == sec_chan->freq)
225 sec_bss++;
226 }
227 if (sec_bss && !pri_bss) {
228 wpa_printf(MSG_INFO,
229 "Switch own primary and secondary channel to get secondary channel with no Beacons from other BSSes");
230 return 2;
231 }
232
233 /*
234 * Match PRI/SEC channel with any existing HT40 BSS on the same
235 * channels that we are about to use (if already mixed order in
236 * existing BSSes, use own preference).
237 */
238 match = 0;
239 for (i = 0; i < scan_res->num; i++) {
240 struct wpa_scan_res *bss = scan_res->res[i];
241 get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan);
242 if (pri_chan->chan == bss_pri_chan &&
243 sec_chan->chan == bss_sec_chan) {
244 match = 1;
245 break;
246 }
247 }
248 if (!match) {
249 for (i = 0; i < scan_res->num; i++) {
250 struct wpa_scan_res *bss = scan_res->res[i];
251 get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan);
252 if (pri_chan->chan == bss_sec_chan &&
253 sec_chan->chan == bss_pri_chan) {
254 wpa_printf(MSG_INFO, "Switch own primary and "
255 "secondary channel due to BSS "
256 "overlap with " MACSTR,
257 MAC2STR(bss->bssid));
258 return 2;
259 }
260 }
261 }
262
263 return 1;
264 }
265
266
check_20mhz_bss(struct wpa_scan_res * bss,int pri_freq,int start,int end)267 static int check_20mhz_bss(struct wpa_scan_res *bss, int pri_freq, int start,
268 int end)
269 {
270 struct ieee802_11_elems elems;
271 struct ieee80211_ht_operation *oper;
272
273 if (bss->freq < start || bss->freq > end || bss->freq == pri_freq)
274 return 0;
275
276 if (ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0) ==
277 ParseFailed)
278 return 0;
279
280 if (!elems.ht_capabilities) {
281 wpa_printf(MSG_DEBUG, "Found overlapping legacy BSS: "
282 MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq);
283 return 1;
284 }
285
286 if (elems.ht_operation) {
287 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
288 if (oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK)
289 return 0;
290
291 wpa_printf(MSG_DEBUG, "Found overlapping 20 MHz HT BSS: "
292 MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq);
293 return 1;
294 }
295 return 0;
296 }
297
298
check_40mhz_2g4(struct hostapd_hw_modes * mode,struct wpa_scan_results * scan_res,int pri_chan,int sec_chan)299 int check_40mhz_2g4(struct hostapd_hw_modes *mode,
300 struct wpa_scan_results *scan_res, int pri_chan,
301 int sec_chan)
302 {
303 int pri_freq, sec_freq;
304 int affected_start, affected_end;
305 size_t i;
306
307 if (!mode || !scan_res || !pri_chan || !sec_chan ||
308 pri_chan == sec_chan)
309 return 0;
310
311 pri_freq = hw_get_freq(mode, pri_chan);
312 sec_freq = hw_get_freq(mode, sec_chan);
313
314 affected_start = (pri_freq + sec_freq) / 2 - 25;
315 affected_end = (pri_freq + sec_freq) / 2 + 25;
316 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
317 affected_start, affected_end);
318 for (i = 0; i < scan_res->num; i++) {
319 struct wpa_scan_res *bss = scan_res->res[i];
320 int pri = bss->freq;
321 int sec = pri;
322 struct ieee802_11_elems elems;
323
324 /* Check for overlapping 20 MHz BSS */
325 if (check_20mhz_bss(bss, pri_freq, affected_start,
326 affected_end)) {
327 wpa_printf(MSG_DEBUG,
328 "Overlapping 20 MHz BSS is found");
329 return 0;
330 }
331
332 get_pri_sec_chan(bss, &pri_chan, &sec_chan);
333
334 if (sec_chan) {
335 if (sec_chan < pri_chan)
336 sec = pri - 20;
337 else
338 sec = pri + 20;
339 }
340
341 if ((pri < affected_start || pri > affected_end) &&
342 (sec < affected_start || sec > affected_end))
343 continue; /* not within affected channel range */
344
345 wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR
346 " freq=%d pri=%d sec=%d",
347 MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan);
348
349 if (sec_chan) {
350 if (pri_freq != pri || sec_freq != sec) {
351 wpa_printf(MSG_DEBUG,
352 "40 MHz pri/sec mismatch with BSS "
353 MACSTR
354 " <%d,%d> (chan=%d%c) vs. <%d,%d>",
355 MAC2STR(bss->bssid),
356 pri, sec, pri_chan,
357 sec > pri ? '+' : '-',
358 pri_freq, sec_freq);
359 return 0;
360 }
361 }
362
363 if (ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len,
364 &elems, 0) != ParseFailed &&
365 elems.ht_capabilities) {
366 struct ieee80211_ht_capabilities *ht_cap =
367 (struct ieee80211_ht_capabilities *)
368 elems.ht_capabilities;
369
370 if (le_to_host16(ht_cap->ht_capabilities_info) &
371 HT_CAP_INFO_40MHZ_INTOLERANT) {
372 wpa_printf(MSG_DEBUG,
373 "40 MHz Intolerant is set on channel %d in BSS "
374 MACSTR, pri, MAC2STR(bss->bssid));
375 return 0;
376 }
377 }
378 }
379
380 return 1;
381 }
382
383
hostapd_set_freq_params(struct hostapd_freq_params * data,enum hostapd_hw_mode mode,int freq,int channel,int enable_edmg,u8 edmg_channel,int ht_enabled,int vht_enabled,int he_enabled,bool eht_enabled,int sec_channel_offset,enum oper_chan_width oper_chwidth,int center_segment0,int center_segment1,u32 vht_caps,struct he_capabilities * he_cap,struct eht_capabilities * eht_cap)384 int hostapd_set_freq_params(struct hostapd_freq_params *data,
385 enum hostapd_hw_mode mode,
386 int freq, int channel, int enable_edmg,
387 u8 edmg_channel, int ht_enabled,
388 int vht_enabled, int he_enabled,
389 bool eht_enabled, int sec_channel_offset,
390 enum oper_chan_width oper_chwidth,
391 int center_segment0,
392 int center_segment1, u32 vht_caps,
393 struct he_capabilities *he_cap,
394 struct eht_capabilities *eht_cap)
395 {
396 if (!he_cap || !he_cap->he_supported)
397 he_enabled = 0;
398 if (!eht_cap || !eht_cap->eht_supported)
399 eht_enabled = 0;
400 os_memset(data, 0, sizeof(*data));
401 data->mode = mode;
402 data->freq = freq;
403 data->channel = channel;
404 data->ht_enabled = ht_enabled;
405 data->vht_enabled = vht_enabled;
406 data->he_enabled = he_enabled;
407 data->eht_enabled = eht_enabled;
408 data->sec_channel_offset = sec_channel_offset;
409 data->center_freq1 = freq + sec_channel_offset * 10;
410 data->center_freq2 = 0;
411 if (oper_chwidth == CONF_OPER_CHWIDTH_80MHZ)
412 data->bandwidth = 80;
413 else if (oper_chwidth == CONF_OPER_CHWIDTH_160MHZ ||
414 oper_chwidth == CONF_OPER_CHWIDTH_80P80MHZ)
415 data->bandwidth = 160;
416 else if (oper_chwidth == CONF_OPER_CHWIDTH_320MHZ)
417 data->bandwidth = 320;
418 else if (sec_channel_offset)
419 data->bandwidth = 40;
420 else
421 data->bandwidth = 20;
422
423
424 hostapd_encode_edmg_chan(enable_edmg, edmg_channel, channel,
425 &data->edmg);
426
427 if (is_6ghz_freq(freq)) {
428 if (!data->he_enabled && !data->eht_enabled) {
429 wpa_printf(MSG_ERROR,
430 "Can't set 6 GHz mode - HE or EHT aren't enabled");
431 return -1;
432 }
433
434 if (center_idx_to_bw_6ghz(channel) < 0) {
435 wpa_printf(MSG_ERROR,
436 "Invalid control channel for 6 GHz band");
437 return -1;
438 }
439
440 if (!center_segment0) {
441 if (center_segment1) {
442 wpa_printf(MSG_ERROR,
443 "Segment 0 center frequency isn't set");
444 return -1;
445 }
446 if (!sec_channel_offset)
447 data->center_freq1 = data->freq;
448 } else {
449 int freq1, freq2 = 0;
450 int bw = center_idx_to_bw_6ghz(center_segment0);
451
452 if (bw < 0) {
453 wpa_printf(MSG_ERROR,
454 "Invalid center frequency index for 6 GHz");
455 return -1;
456 }
457
458 freq1 = ieee80211_chan_to_freq(NULL, 131,
459 center_segment0);
460 if (freq1 < 0) {
461 wpa_printf(MSG_ERROR,
462 "Invalid segment 0 center frequency for 6 GHz");
463 return -1;
464 }
465
466 if (center_segment1) {
467 if (center_idx_to_bw_6ghz(center_segment1) != 2 ||
468 bw != 2) {
469 wpa_printf(MSG_ERROR,
470 "6 GHz 80+80 MHz configuration doesn't use valid 80 MHz channels");
471 return -1;
472 }
473
474 freq2 = ieee80211_chan_to_freq(NULL, 131,
475 center_segment1);
476 if (freq2 < 0) {
477 wpa_printf(MSG_ERROR,
478 "Invalid segment 1 center frequency for UHB");
479 return -1;
480 }
481 }
482
483 data->bandwidth = (1 << (u8) bw) * 20;
484 data->center_freq1 = freq1;
485 data->center_freq2 = freq2;
486 }
487 data->ht_enabled = 0;
488 data->vht_enabled = 0;
489
490 return 0;
491 }
492
493 if (data->eht_enabled) switch (oper_chwidth) {
494 case CONF_OPER_CHWIDTH_320MHZ:
495 if (!(eht_cap->phy_cap[EHT_PHYCAP_320MHZ_IN_6GHZ_SUPPORT_IDX] &
496 EHT_PHYCAP_320MHZ_IN_6GHZ_SUPPORT_MASK)) {
497 wpa_printf(MSG_ERROR,
498 "320 MHz channel width is not supported in 5 or 6 GHz");
499 return -1;
500 }
501 break;
502 default:
503 break;
504 }
505
506 if (data->he_enabled || data->eht_enabled) switch (oper_chwidth) {
507 case CONF_OPER_CHWIDTH_USE_HT:
508 if (sec_channel_offset == 0)
509 break;
510
511 if (mode == HOSTAPD_MODE_IEEE80211G) {
512 if (he_cap &&
513 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
514 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_IN_2G)) {
515 wpa_printf(MSG_ERROR,
516 "40 MHz channel width is not supported in 2.4 GHz");
517 return -1;
518 }
519 break;
520 }
521 /* fall through */
522 case CONF_OPER_CHWIDTH_80MHZ:
523 if (mode == HOSTAPD_MODE_IEEE80211A) {
524 if (he_cap &&
525 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
526 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) {
527 wpa_printf(MSG_ERROR,
528 "40/80 MHz channel width is not supported in 5/6 GHz");
529 return -1;
530 }
531 }
532 break;
533 case CONF_OPER_CHWIDTH_80P80MHZ:
534 if (he_cap &&
535 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
536 HE_PHYCAP_CHANNEL_WIDTH_SET_80PLUS80MHZ_IN_5G)) {
537 wpa_printf(MSG_ERROR,
538 "80+80 MHz channel width is not supported in 5/6 GHz");
539 return -1;
540 }
541 break;
542 case CONF_OPER_CHWIDTH_160MHZ:
543 if (he_cap &&
544 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
545 HE_PHYCAP_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) {
546 wpa_printf(MSG_ERROR,
547 "160 MHz channel width is not supported in 5 / 6GHz");
548 return -1;
549 }
550 break;
551 default:
552 break;
553 } else if (data->vht_enabled) switch (oper_chwidth) {
554 case CONF_OPER_CHWIDTH_USE_HT:
555 break;
556 case CONF_OPER_CHWIDTH_80P80MHZ:
557 if (!(vht_caps & VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)) {
558 wpa_printf(MSG_ERROR,
559 "80+80 channel width is not supported!");
560 return -1;
561 }
562 /* fall through */
563 case CONF_OPER_CHWIDTH_80MHZ:
564 break;
565 case CONF_OPER_CHWIDTH_160MHZ:
566 if (!(vht_caps & (VHT_CAP_SUPP_CHAN_WIDTH_160MHZ |
567 VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) {
568 wpa_printf(MSG_ERROR,
569 "160 MHz channel width is not supported!");
570 return -1;
571 }
572 break;
573 default:
574 break;
575 }
576
577 if (data->eht_enabled || data->he_enabled ||
578 data->vht_enabled) switch (oper_chwidth) {
579 case CONF_OPER_CHWIDTH_USE_HT:
580 if (center_segment1 ||
581 (center_segment0 != 0 &&
582 5000 + center_segment0 * 5 != data->center_freq1 &&
583 2407 + center_segment0 * 5 != data->center_freq1)) {
584 wpa_printf(MSG_ERROR,
585 "20/40 MHz: center segment 0 (=%d) and center freq 1 (=%d) not in sync",
586 center_segment0, data->center_freq1);
587 return -1;
588 }
589 break;
590 case CONF_OPER_CHWIDTH_80P80MHZ:
591 if (center_segment1 == center_segment0 + 4 ||
592 center_segment1 == center_segment0 - 4) {
593 wpa_printf(MSG_ERROR,
594 "80+80 MHz: center segment 1 only 20 MHz apart");
595 return -1;
596 }
597 data->center_freq2 = 5000 + center_segment1 * 5;
598 /* fall through */
599 case CONF_OPER_CHWIDTH_80MHZ:
600 data->bandwidth = 80;
601 if (!sec_channel_offset) {
602 wpa_printf(MSG_ERROR,
603 "80/80+80 MHz: no second channel offset");
604 return -1;
605 }
606 if (oper_chwidth == CONF_OPER_CHWIDTH_80MHZ &&
607 center_segment1) {
608 wpa_printf(MSG_ERROR,
609 "80 MHz: center segment 1 configured");
610 return -1;
611 }
612 if (oper_chwidth == CONF_OPER_CHWIDTH_80P80MHZ &&
613 !center_segment1) {
614 wpa_printf(MSG_ERROR,
615 "80+80 MHz: center segment 1 not configured");
616 return -1;
617 }
618 if (!center_segment0) {
619 if (channel <= 48)
620 center_segment0 = 42;
621 else if (channel <= 64)
622 center_segment0 = 58;
623 else if (channel <= 112)
624 center_segment0 = 106;
625 else if (channel <= 128)
626 center_segment0 = 122;
627 else if (channel <= 144)
628 center_segment0 = 138;
629 else if (channel <= 161)
630 center_segment0 = 155;
631 else if (channel <= 177)
632 center_segment0 = 171;
633 data->center_freq1 = 5000 + center_segment0 * 5;
634 } else {
635 /*
636 * Note: HT/VHT config and params are coupled. Check if
637 * HT40 channel band is in VHT80 Pri channel band
638 * configuration.
639 */
640 if (center_segment0 == channel + 6 ||
641 center_segment0 == channel + 2 ||
642 center_segment0 == channel - 2 ||
643 center_segment0 == channel - 6)
644 data->center_freq1 = 5000 + center_segment0 * 5;
645 else {
646 wpa_printf(MSG_ERROR,
647 "Wrong coupling between HT and VHT/HE channel setting");
648 return -1;
649 }
650 }
651 break;
652 case CONF_OPER_CHWIDTH_160MHZ:
653 data->bandwidth = 160;
654 if (center_segment1) {
655 wpa_printf(MSG_ERROR,
656 "160 MHz: center segment 1 should not be set");
657 return -1;
658 }
659 if (!sec_channel_offset) {
660 wpa_printf(MSG_ERROR,
661 "160 MHz: second channel offset not set");
662 return -1;
663 }
664 /*
665 * Note: HT/VHT config and params are coupled. Check if
666 * HT40 channel band is in VHT160 channel band configuration.
667 */
668 if (center_segment0 == channel + 14 ||
669 center_segment0 == channel + 10 ||
670 center_segment0 == channel + 6 ||
671 center_segment0 == channel + 2 ||
672 center_segment0 == channel - 2 ||
673 center_segment0 == channel - 6 ||
674 center_segment0 == channel - 10 ||
675 center_segment0 == channel - 14)
676 data->center_freq1 = 5000 + center_segment0 * 5;
677 else {
678 wpa_printf(MSG_ERROR,
679 "160 MHz: HT40 channel band is not in 160 MHz band");
680 return -1;
681 }
682 break;
683 case CONF_OPER_CHWIDTH_320MHZ:
684 data->bandwidth = 320;
685 if (!data->eht_enabled || !is_6ghz_freq(freq)) {
686 wpa_printf(MSG_ERROR,
687 "320 MHz: EHT not enabled or not a 6 GHz channel");
688 return -1;
689 }
690 if (center_segment1) {
691 wpa_printf(MSG_ERROR,
692 "320 MHz: center segment 1 should not be set");
693 return -1;
694 }
695 if (center_segment0 == channel + 30 ||
696 center_segment0 == channel + 26 ||
697 center_segment0 == channel + 22 ||
698 center_segment0 == channel + 18 ||
699 center_segment0 == channel + 14 ||
700 center_segment0 == channel + 10 ||
701 center_segment0 == channel + 6 ||
702 center_segment0 == channel + 2 ||
703 center_segment0 == channel - 2 ||
704 center_segment0 == channel - 6 ||
705 center_segment0 == channel - 10 ||
706 center_segment0 == channel - 14 ||
707 center_segment0 == channel - 18 ||
708 center_segment0 == channel - 22 ||
709 center_segment0 == channel - 26 ||
710 center_segment0 == channel - 30)
711 data->center_freq1 = 5000 + center_segment0 * 5;
712 else {
713 wpa_printf(MSG_ERROR,
714 "320 MHz: wrong center segment 0");
715 return -1;
716 }
717 break;
718 default:
719 break;
720 }
721
722 return 0;
723 }
724
725
set_disable_ht40(struct ieee80211_ht_capabilities * htcaps,int disabled)726 void set_disable_ht40(struct ieee80211_ht_capabilities *htcaps,
727 int disabled)
728 {
729 /* Masking these out disables HT40 */
730 le16 msk = host_to_le16(HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET |
731 HT_CAP_INFO_SHORT_GI40MHZ);
732
733 if (disabled)
734 htcaps->ht_capabilities_info &= ~msk;
735 else
736 htcaps->ht_capabilities_info |= msk;
737 }
738
739
740 #ifdef CONFIG_IEEE80211AC
741
_ieee80211ac_cap_check(u32 hw,u32 conf,u32 cap,const char * name)742 static int _ieee80211ac_cap_check(u32 hw, u32 conf, u32 cap,
743 const char *name)
744 {
745 u32 req_cap = conf & cap;
746
747 /*
748 * Make sure we support all requested capabilities.
749 * NOTE: We assume that 'cap' represents a capability mask,
750 * not a discrete value.
751 */
752 if ((hw & req_cap) != req_cap) {
753 wpa_printf(MSG_ERROR,
754 "Driver does not support configured VHT capability [%s]",
755 name);
756 return 0;
757 }
758 return 1;
759 }
760
761
ieee80211ac_cap_check_max(u32 hw,u32 conf,u32 mask,unsigned int shift,const char * name)762 static int ieee80211ac_cap_check_max(u32 hw, u32 conf, u32 mask,
763 unsigned int shift,
764 const char *name)
765 {
766 u32 hw_max = hw & mask;
767 u32 conf_val = conf & mask;
768
769 if (conf_val > hw_max) {
770 wpa_printf(MSG_ERROR,
771 "Configured VHT capability [%s] exceeds max value supported by the driver (%d > %d)",
772 name, conf_val >> shift, hw_max >> shift);
773 return 0;
774 }
775 return 1;
776 }
777
778
ieee80211ac_cap_check(u32 hw,u32 conf)779 int ieee80211ac_cap_check(u32 hw, u32 conf)
780 {
781 #define VHT_CAP_CHECK(cap) \
782 do { \
783 if (!_ieee80211ac_cap_check(hw, conf, cap, #cap)) \
784 return 0; \
785 } while (0)
786
787 #define VHT_CAP_CHECK_MAX(cap) \
788 do { \
789 if (!ieee80211ac_cap_check_max(hw, conf, cap, cap ## _SHIFT, \
790 #cap)) \
791 return 0; \
792 } while (0)
793
794 VHT_CAP_CHECK_MAX(VHT_CAP_MAX_MPDU_LENGTH_MASK);
795 VHT_CAP_CHECK_MAX(VHT_CAP_SUPP_CHAN_WIDTH_MASK);
796 VHT_CAP_CHECK(VHT_CAP_RXLDPC);
797 VHT_CAP_CHECK(VHT_CAP_SHORT_GI_80);
798 VHT_CAP_CHECK(VHT_CAP_SHORT_GI_160);
799 VHT_CAP_CHECK(VHT_CAP_TXSTBC);
800 VHT_CAP_CHECK_MAX(VHT_CAP_RXSTBC_MASK);
801 VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMER_CAPABLE);
802 VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMEE_CAPABLE);
803 VHT_CAP_CHECK_MAX(VHT_CAP_BEAMFORMEE_STS_MAX);
804 VHT_CAP_CHECK_MAX(VHT_CAP_SOUNDING_DIMENSION_MAX);
805 VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMER_CAPABLE);
806 VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMEE_CAPABLE);
807 VHT_CAP_CHECK(VHT_CAP_VHT_TXOP_PS);
808 VHT_CAP_CHECK(VHT_CAP_HTC_VHT);
809 VHT_CAP_CHECK_MAX(VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MAX);
810 VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB);
811 VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB);
812 VHT_CAP_CHECK(VHT_CAP_RX_ANTENNA_PATTERN);
813 VHT_CAP_CHECK(VHT_CAP_TX_ANTENNA_PATTERN);
814
815 #undef VHT_CAP_CHECK
816 #undef VHT_CAP_CHECK_MAX
817
818 return 1;
819 }
820
821 #endif /* CONFIG_IEEE80211AC */
822
823
num_chan_to_bw(int num_chans)824 u32 num_chan_to_bw(int num_chans)
825 {
826 switch (num_chans) {
827 case 2:
828 case 4:
829 case 8:
830 case 16:
831 return num_chans * 20;
832 default:
833 return 20;
834 }
835 }
836
837
838 /* check if BW is applicable for channel */
chan_bw_allowed(const struct hostapd_channel_data * chan,u32 bw,int ht40_plus,int pri)839 int chan_bw_allowed(const struct hostapd_channel_data *chan, u32 bw,
840 int ht40_plus, int pri)
841 {
842 u32 bw_mask;
843
844 switch (bw) {
845 case 20:
846 bw_mask = HOSTAPD_CHAN_WIDTH_20;
847 break;
848 case 40:
849 /* HT 40 MHz support declared only for primary channel,
850 * just skip 40 MHz secondary checking */
851 if (pri && ht40_plus)
852 bw_mask = HOSTAPD_CHAN_WIDTH_40P;
853 else if (pri && !ht40_plus)
854 bw_mask = HOSTAPD_CHAN_WIDTH_40M;
855 else
856 bw_mask = 0;
857 break;
858 case 80:
859 bw_mask = HOSTAPD_CHAN_WIDTH_80;
860 break;
861 case 160:
862 bw_mask = HOSTAPD_CHAN_WIDTH_160;
863 break;
864 case 320:
865 bw_mask = HOSTAPD_CHAN_WIDTH_320;
866 break;
867 default:
868 bw_mask = 0;
869 break;
870 }
871
872 return (chan->allowed_bw & bw_mask) == bw_mask;
873 }
874
875
876 /* check if channel is allowed to be used as primary */
chan_pri_allowed(const struct hostapd_channel_data * chan)877 int chan_pri_allowed(const struct hostapd_channel_data *chan)
878 {
879 return !(chan->flag & HOSTAPD_CHAN_DISABLED) &&
880 (chan->allowed_bw & HOSTAPD_CHAN_WIDTH_20);
881 }
882
883
884 /* IEEE P802.11be/D3.0, Table 36-30 - Definition of the Punctured Channel
885 * Information field in the U-SIG for an EHT MU PPDU using non-OFDMA
886 * transmissions */
887 static const u16 punct_bitmap_80[] = { 0xF, 0xE, 0xD, 0xB, 0x7 };
888 static const u16 punct_bitmap_160[] = {
889 0xFF, 0xFE, 0xFD, 0xFB, 0xF7, 0xEF, 0xDF, 0xBF,
890 0x7F, 0xFC, 0xF3, 0xCF, 0x3F
891 };
892 static const u16 punct_bitmap_320[] = {
893 0xFFFF, 0xFFFC, 0xFFF3, 0xFFCF, 0xFF3F, 0xFCFF, 0xF3FF, 0xCFFF,
894 0x3FFF, 0xFFF0, 0xFF0F, 0xF0FF, 0x0FFF, 0xFFC0, 0xFF30, 0xFCF0,
895 0xF3F0, 0xCFF0, 0x3FF0, 0x0FFC, 0x0FF3, 0x0FCF, 0x0F3F, 0x0CFF,
896 0x03FF
897 };
898
899
is_punct_bitmap_valid(u16 bw,u16 pri_ch_bit_pos,u16 punct_bitmap)900 bool is_punct_bitmap_valid(u16 bw, u16 pri_ch_bit_pos, u16 punct_bitmap)
901 {
902 u8 i, count;
903 u16 bitmap;
904 const u16 *valid_bitmaps;
905
906 if (!punct_bitmap) /* All channels active */
907 return true;
908
909 bitmap = ~punct_bitmap;
910
911 switch (bw) {
912 case 80:
913 bitmap &= 0xF;
914 valid_bitmaps = punct_bitmap_80;
915 count = ARRAY_SIZE(punct_bitmap_80);
916 break;
917
918 case 160:
919 bitmap &= 0xFF;
920 valid_bitmaps = punct_bitmap_160;
921 count = ARRAY_SIZE(punct_bitmap_160);
922 break;
923
924 case 320:
925 bitmap &= 0xFFFF;
926 valid_bitmaps = punct_bitmap_320;
927 count = ARRAY_SIZE(punct_bitmap_320);
928 break;
929
930 default:
931 return false;
932 }
933
934 if (!bitmap) /* No channel active */
935 return false;
936
937 if (!(bitmap & BIT(pri_ch_bit_pos))) {
938 wpa_printf(MSG_DEBUG, "Primary channel cannot be punctured");
939 return false;
940 }
941
942 for (i = 0; i < count; i++) {
943 if (valid_bitmaps[i] == bitmap)
944 return true;
945 }
946
947 return false;
948 }
949