1 /*
2 * hostapd / Hardware feature query and different modes
3 * Copyright 2002-2003, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
6 *
7 * This software may be distributed under the terms of the BSD license.
8 * See README for more details.
9 */
10
11 #include "utils/includes.h"
12
13 #include "utils/common.h"
14 #include "utils/eloop.h"
15 #include "common/ieee802_11_defs.h"
16 #include "common/ieee802_11_common.h"
17 #include "common/wpa_ctrl.h"
18 #include "common/hw_features_common.h"
19 #include "hostapd.h"
20 #include "ap_config.h"
21 #include "ap_drv_ops.h"
22 #include "acs.h"
23 #include "ieee802_11.h"
24 #include "beacon.h"
25 #include "hw_features.h"
26
27 #ifdef __ZEPHYR__
28 #include <supp_events.h>
29 #endif /* __ZEPHYR__ */
30
31
hostapd_free_hw_features(struct hostapd_hw_modes * hw_features,size_t num_hw_features)32 void hostapd_free_hw_features(struct hostapd_hw_modes *hw_features,
33 size_t num_hw_features)
34 {
35 size_t i;
36
37 if (hw_features == NULL)
38 return;
39
40 for (i = 0; i < num_hw_features; i++) {
41 os_free(hw_features[i].channels);
42 os_free(hw_features[i].rates);
43 }
44
45 os_free(hw_features);
46 }
47
48
49 #ifndef CONFIG_NO_STDOUT_DEBUG
dfs_info(struct hostapd_channel_data * chan)50 static char * dfs_info(struct hostapd_channel_data *chan)
51 {
52 static char info[256];
53 char *state;
54
55 switch (chan->flag & HOSTAPD_CHAN_DFS_MASK) {
56 case HOSTAPD_CHAN_DFS_UNKNOWN:
57 state = "unknown";
58 break;
59 case HOSTAPD_CHAN_DFS_USABLE:
60 state = "usable";
61 break;
62 case HOSTAPD_CHAN_DFS_UNAVAILABLE:
63 state = "unavailable";
64 break;
65 case HOSTAPD_CHAN_DFS_AVAILABLE:
66 state = "available";
67 break;
68 default:
69 return "";
70 }
71 os_snprintf(info, sizeof(info), " (DFS state = %s)", state);
72 info[sizeof(info) - 1] = '\0';
73
74 return info;
75 }
76 #endif /* CONFIG_NO_STDOUT_DEBUG */
77
78
hostapd_get_hw_features(struct hostapd_iface * iface)79 int hostapd_get_hw_features(struct hostapd_iface *iface)
80 {
81 struct hostapd_data *hapd = iface->bss[0];
82 int i, j;
83 u16 num_modes, flags;
84 struct hostapd_hw_modes *modes;
85 u8 dfs_domain;
86 enum hostapd_hw_mode mode = HOSTAPD_MODE_IEEE80211ANY;
87 bool is_6ghz = false;
88 bool orig_mode_valid = false;
89
90 if (hostapd_drv_none(hapd))
91 return -1;
92 modes = hostapd_get_hw_feature_data(hapd, &num_modes, &flags,
93 &dfs_domain);
94 if (modes == NULL) {
95 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
96 HOSTAPD_LEVEL_DEBUG,
97 "Fetching hardware channel/rate support not "
98 "supported.");
99 return -1;
100 }
101
102 iface->hw_flags = flags;
103 iface->dfs_domain = dfs_domain;
104
105 if (iface->current_mode) {
106 /*
107 * Received driver event CHANNEL_LIST_CHANGED when the current
108 * hw mode is valid. Clear iface->current_mode temporarily as
109 * the mode instance will be replaced with a new instance and
110 * the current pointer would be pointing to freed memory.
111 */
112 orig_mode_valid = true;
113 mode = iface->current_mode->mode;
114 is_6ghz = iface->current_mode->is_6ghz;
115 iface->current_mode = NULL;
116 }
117 hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
118 iface->hw_features = modes;
119 iface->num_hw_features = num_modes;
120
121 for (i = 0; i < num_modes; i++) {
122 struct hostapd_hw_modes *feature = &modes[i];
123 int dfs_enabled = hapd->iconf->ieee80211h &&
124 (iface->drv_flags & WPA_DRIVER_FLAGS_RADAR);
125
126 /* Restore orignal mode if possible */
127 if (orig_mode_valid && feature->mode == mode &&
128 feature->num_channels > 0 &&
129 is_6ghz == is_6ghz_freq(feature->channels[0].freq))
130 iface->current_mode = feature;
131
132 /* set flag for channels we can use in current regulatory
133 * domain */
134 for (j = 0; j < feature->num_channels; j++) {
135 int dfs = 0;
136
137 /*
138 * Disable all channels that are marked not to allow
139 * to initiate radiation (a.k.a. passive scan and no
140 * IBSS).
141 * Use radar channels only if the driver supports DFS.
142 */
143 if ((feature->channels[j].flag &
144 HOSTAPD_CHAN_RADAR) && dfs_enabled) {
145 dfs = 1;
146 } else if (((feature->channels[j].flag &
147 HOSTAPD_CHAN_RADAR) &&
148 !(iface->drv_flags &
149 WPA_DRIVER_FLAGS_DFS_OFFLOAD)) ||
150 (feature->channels[j].flag &
151 HOSTAPD_CHAN_NO_IR)) {
152 feature->channels[j].flag |=
153 HOSTAPD_CHAN_DISABLED;
154 }
155
156 if (feature->channels[j].flag & HOSTAPD_CHAN_DISABLED)
157 continue;
158
159 wpa_printf(MSG_MSGDUMP, "Allowed channel: mode=%d "
160 "chan=%d freq=%d MHz max_tx_power=%d dBm%s",
161 feature->mode,
162 feature->channels[j].chan,
163 feature->channels[j].freq,
164 feature->channels[j].max_tx_power,
165 dfs ? dfs_info(&feature->channels[j]) : "");
166 }
167 }
168
169 if (orig_mode_valid && !iface->current_mode) {
170 wpa_printf(MSG_ERROR,
171 "%s: Could not update iface->current_mode",
172 __func__);
173 }
174
175 return 0;
176 }
177
178
hostapd_prepare_rates(struct hostapd_iface * iface,struct hostapd_hw_modes * mode)179 int hostapd_prepare_rates(struct hostapd_iface *iface,
180 struct hostapd_hw_modes *mode)
181 {
182 int i, num_basic_rates = 0;
183 int basic_rates_a[] = { 60, 120, 240, -1 };
184 int basic_rates_b[] = { 10, 20, -1 };
185 int basic_rates_g[] = { 10, 20, 55, 110, -1 };
186 int *basic_rates;
187
188 if (iface->conf->basic_rates)
189 basic_rates = iface->conf->basic_rates;
190 else switch (mode->mode) {
191 case HOSTAPD_MODE_IEEE80211A:
192 basic_rates = basic_rates_a;
193 break;
194 case HOSTAPD_MODE_IEEE80211B:
195 basic_rates = basic_rates_b;
196 break;
197 case HOSTAPD_MODE_IEEE80211G:
198 basic_rates = basic_rates_g;
199 break;
200 case HOSTAPD_MODE_IEEE80211AD:
201 return 0; /* No basic rates for 11ad */
202 default:
203 return -1;
204 }
205
206 i = 0;
207 while (basic_rates[i] >= 0)
208 i++;
209 if (i)
210 i++; /* -1 termination */
211 os_free(iface->basic_rates);
212 iface->basic_rates = os_malloc(i * sizeof(int));
213 if (iface->basic_rates)
214 os_memcpy(iface->basic_rates, basic_rates, i * sizeof(int));
215
216 os_free(iface->current_rates);
217 iface->num_rates = 0;
218
219 iface->current_rates =
220 os_calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
221 if (!iface->current_rates) {
222 wpa_printf(MSG_ERROR, "Failed to allocate memory for rate "
223 "table.");
224 return -1;
225 }
226
227 for (i = 0; i < mode->num_rates; i++) {
228 struct hostapd_rate_data *rate;
229
230 if (iface->conf->supported_rates &&
231 !hostapd_rate_found(iface->conf->supported_rates,
232 mode->rates[i]))
233 continue;
234
235 rate = &iface->current_rates[iface->num_rates];
236 rate->rate = mode->rates[i];
237 if (hostapd_rate_found(basic_rates, rate->rate)) {
238 rate->flags |= HOSTAPD_RATE_BASIC;
239 num_basic_rates++;
240 }
241 wpa_printf(MSG_DEBUG, "RATE[%d] rate=%d flags=0x%x",
242 iface->num_rates, rate->rate, rate->flags);
243 iface->num_rates++;
244 }
245
246 if ((iface->num_rates == 0 || num_basic_rates == 0) &&
247 (!iface->conf->ieee80211n || !iface->conf->require_ht)) {
248 wpa_printf(MSG_ERROR, "No rates remaining in supported/basic "
249 "rate sets (%d,%d).",
250 iface->num_rates, num_basic_rates);
251 return -1;
252 }
253
254 return 0;
255 }
256
257
ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface * iface)258 static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface)
259 {
260 int pri_freq, sec_freq;
261 struct hostapd_channel_data *p_chan, *s_chan;
262
263 pri_freq = iface->freq;
264 sec_freq = pri_freq + iface->conf->secondary_channel * 20;
265
266 if (!iface->current_mode)
267 return 0;
268
269 p_chan = hw_get_channel_freq(iface->current_mode->mode, pri_freq, NULL,
270 iface->hw_features,
271 iface->num_hw_features);
272
273 s_chan = hw_get_channel_freq(iface->current_mode->mode, sec_freq, NULL,
274 iface->hw_features,
275 iface->num_hw_features);
276
277 return allowed_ht40_channel_pair(iface->current_mode->mode,
278 p_chan, s_chan);
279 }
280
281
ieee80211n_switch_pri_sec(struct hostapd_iface * iface)282 static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface)
283 {
284 if (iface->conf->secondary_channel > 0) {
285 iface->conf->channel += 4;
286 iface->freq += 20;
287 iface->conf->secondary_channel = -1;
288 } else {
289 iface->conf->channel -= 4;
290 iface->freq -= 20;
291 iface->conf->secondary_channel = 1;
292 }
293 }
294
295
ieee80211n_check_40mhz_5g(struct hostapd_iface * iface,struct wpa_scan_results * scan_res)296 static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface,
297 struct wpa_scan_results *scan_res)
298 {
299 unsigned int pri_freq, sec_freq;
300 int res;
301 struct hostapd_channel_data *pri_chan, *sec_chan;
302
303 pri_freq = iface->freq;
304 sec_freq = pri_freq + iface->conf->secondary_channel * 20;
305
306 if (!iface->current_mode)
307 return 0;
308 pri_chan = hw_get_channel_freq(iface->current_mode->mode, pri_freq,
309 NULL, iface->hw_features,
310 iface->num_hw_features);
311 sec_chan = hw_get_channel_freq(iface->current_mode->mode, sec_freq,
312 NULL, iface->hw_features,
313 iface->num_hw_features);
314
315 res = check_40mhz_5g(scan_res, pri_chan, sec_chan);
316
317 if (res == 2) {
318 if (iface->conf->no_pri_sec_switch) {
319 wpa_printf(MSG_DEBUG,
320 "Cannot switch PRI/SEC channels due to local constraint");
321 } else {
322 ieee80211n_switch_pri_sec(iface);
323 }
324 }
325
326 return !!res;
327 }
328
329
ieee80211n_check_40mhz_2g4(struct hostapd_iface * iface,struct wpa_scan_results * scan_res)330 static int ieee80211n_check_40mhz_2g4(struct hostapd_iface *iface,
331 struct wpa_scan_results *scan_res)
332 {
333 int pri_chan, sec_chan;
334
335 pri_chan = iface->conf->channel;
336 sec_chan = pri_chan + iface->conf->secondary_channel * 4;
337
338 return check_40mhz_2g4(iface->current_mode, scan_res, pri_chan,
339 sec_chan);
340 }
341
342
ieee80211n_check_scan(struct hostapd_iface * iface)343 static void ieee80211n_check_scan(struct hostapd_iface *iface)
344 {
345 struct wpa_scan_results *scan_res;
346 int oper40;
347 int res = 0;
348
349 /* Check list of neighboring BSSes (from scan) to see whether 40 MHz is
350 * allowed per IEEE Std 802.11-2012, 10.15.3.2 */
351
352 iface->scan_cb = NULL;
353
354 scan_res = hostapd_driver_get_scan_results(iface->bss[0]);
355 if (scan_res == NULL) {
356 hostapd_setup_interface_complete(iface, 1);
357 return;
358 }
359
360 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A)
361 oper40 = ieee80211n_check_40mhz_5g(iface, scan_res);
362 else
363 oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res);
364 wpa_scan_results_free(scan_res);
365
366 iface->secondary_ch = iface->conf->secondary_channel;
367 if (!oper40) {
368 wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on "
369 "channel pri=%d sec=%d based on overlapping BSSes",
370 iface->conf->channel,
371 iface->conf->channel +
372 iface->conf->secondary_channel * 4);
373 iface->conf->secondary_channel = 0;
374 if (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX) {
375 /*
376 * TODO: Could consider scheduling another scan to check
377 * if channel width can be changed if no coex reports
378 * are received from associating stations.
379 */
380 }
381 }
382
383 #ifdef CONFIG_IEEE80211AX
384 if (iface->conf->secondary_channel &&
385 iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
386 iface->conf->ieee80211ax) {
387 struct he_capabilities *he_cap;
388
389 he_cap = &iface->current_mode->he_capab[IEEE80211_MODE_AP];
390 if (!(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
391 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_IN_2G)) {
392 wpa_printf(MSG_DEBUG,
393 "HE: 40 MHz channel width is not supported in 2.4 GHz; clear secondary channel configuration");
394 iface->conf->secondary_channel = 0;
395 }
396 }
397 #endif /* CONFIG_IEEE80211AX */
398
399 if (iface->conf->secondary_channel)
400 res = ieee80211n_allowed_ht40_channel_pair(iface);
401 if (!res) {
402 iface->conf->secondary_channel = 0;
403 hostapd_set_oper_centr_freq_seg0_idx(iface->conf, 0);
404 hostapd_set_oper_centr_freq_seg1_idx(iface->conf, 0);
405 hostapd_set_oper_chwidth(iface->conf, CONF_OPER_CHWIDTH_USE_HT);
406 res = 1;
407 wpa_printf(MSG_INFO, "Fallback to 20 MHz");
408 }
409
410 hostapd_setup_interface_complete(iface, !res);
411 }
412
413
ieee80211n_scan_channels_2g4(struct hostapd_iface * iface,struct wpa_driver_scan_params * params)414 static void ieee80211n_scan_channels_2g4(struct hostapd_iface *iface,
415 struct wpa_driver_scan_params *params)
416 {
417 /* Scan only the affected frequency range */
418 int pri_freq, sec_freq;
419 int affected_start, affected_end;
420 int i, pos;
421 struct hostapd_hw_modes *mode;
422
423 if (iface->current_mode == NULL)
424 return;
425
426 pri_freq = iface->freq;
427 if (iface->conf->secondary_channel > 0)
428 sec_freq = pri_freq + 20;
429 else
430 sec_freq = pri_freq - 20;
431 /*
432 * Note: Need to find the PRI channel also in cases where the affected
433 * channel is the SEC channel of a 40 MHz BSS, so need to include the
434 * scanning coverage here to be 40 MHz from the center frequency.
435 */
436 affected_start = (pri_freq + sec_freq) / 2 - 40;
437 affected_end = (pri_freq + sec_freq) / 2 + 40;
438 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
439 affected_start, affected_end);
440
441 mode = iface->current_mode;
442 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
443 if (params->freqs == NULL)
444 return;
445 pos = 0;
446
447 for (i = 0; i < mode->num_channels; i++) {
448 struct hostapd_channel_data *chan = &mode->channels[i];
449 if (chan->flag & HOSTAPD_CHAN_DISABLED)
450 continue;
451 if (chan->freq < affected_start ||
452 chan->freq > affected_end)
453 continue;
454 params->freqs[pos++] = chan->freq;
455 }
456 }
457
458
ieee80211n_scan_channels_5g(struct hostapd_iface * iface,struct wpa_driver_scan_params * params)459 static void ieee80211n_scan_channels_5g(struct hostapd_iface *iface,
460 struct wpa_driver_scan_params *params)
461 {
462 /* Scan only the affected frequency range */
463 int pri_freq;
464 int affected_start, affected_end;
465 int i, pos;
466 struct hostapd_hw_modes *mode;
467
468 if (iface->current_mode == NULL)
469 return;
470
471 pri_freq = iface->freq;
472 if (iface->conf->secondary_channel > 0) {
473 affected_start = pri_freq - 10;
474 affected_end = pri_freq + 30;
475 } else {
476 affected_start = pri_freq - 30;
477 affected_end = pri_freq + 10;
478 }
479 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
480 affected_start, affected_end);
481
482 mode = iface->current_mode;
483 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
484 if (params->freqs == NULL)
485 return;
486 pos = 0;
487
488 for (i = 0; i < mode->num_channels; i++) {
489 struct hostapd_channel_data *chan = &mode->channels[i];
490 if (chan->flag & HOSTAPD_CHAN_DISABLED)
491 continue;
492 if (chan->freq < affected_start ||
493 chan->freq > affected_end)
494 continue;
495 params->freqs[pos++] = chan->freq;
496 }
497 }
498
499
ap_ht40_scan_retry(void * eloop_data,void * user_data)500 static void ap_ht40_scan_retry(void *eloop_data, void *user_data)
501 {
502 #define HT2040_COEX_SCAN_RETRY 15
503 struct hostapd_iface *iface = eloop_data;
504 struct wpa_driver_scan_params params;
505 int ret;
506
507 os_memset(¶ms, 0, sizeof(params));
508 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
509 ieee80211n_scan_channels_2g4(iface, ¶ms);
510 else
511 ieee80211n_scan_channels_5g(iface, ¶ms);
512
513 params.link_id = -1;
514 #ifdef CONFIG_IEEE80211BE
515 if (iface->bss[0]->conf->mld_ap)
516 params.link_id = iface->bss[0]->mld_link_id;
517 #endif /* CONFIG_IEEE80211BE */
518
519 ret = hostapd_driver_scan(iface->bss[0], ¶ms);
520 iface->num_ht40_scan_tries++;
521 os_free(params.freqs);
522
523 if (ret == -EBUSY &&
524 iface->num_ht40_scan_tries < HT2040_COEX_SCAN_RETRY) {
525 wpa_printf(MSG_ERROR,
526 "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again (attempt %d)",
527 ret, strerror(-ret), iface->num_ht40_scan_tries);
528 eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL);
529 return;
530 }
531
532 if (ret == 0) {
533 iface->scan_cb = ieee80211n_check_scan;
534 iface->bss[0]->scan_cookie = params.scan_cookie;
535 return;
536 }
537
538 wpa_printf(MSG_DEBUG,
539 "Failed to request a scan in device, bringing up in HT20 mode");
540 iface->conf->secondary_channel = 0;
541 iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
542 hostapd_setup_interface_complete(iface, 0);
543 }
544
545
hostapd_stop_setup_timers(struct hostapd_iface * iface)546 void hostapd_stop_setup_timers(struct hostapd_iface *iface)
547 {
548 eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL);
549 }
550
551
ieee80211n_check_40mhz(struct hostapd_iface * iface)552 static int ieee80211n_check_40mhz(struct hostapd_iface *iface)
553 {
554 struct wpa_driver_scan_params params;
555 int ret;
556
557 /* Check that HT40 is used and PRI / SEC switch is allowed */
558 if (!iface->conf->secondary_channel || iface->conf->no_pri_sec_switch)
559 return 0;
560
561 hostapd_set_state(iface, HAPD_IFACE_HT_SCAN);
562 wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling "
563 "40 MHz channel");
564 os_memset(¶ms, 0, sizeof(params));
565 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
566 ieee80211n_scan_channels_2g4(iface, ¶ms);
567 else
568 ieee80211n_scan_channels_5g(iface, ¶ms);
569
570 params.link_id = -1;
571 #ifdef CONFIG_IEEE80211BE
572 if (iface->bss[0]->conf->mld_ap)
573 params.link_id = iface->bss[0]->mld_link_id;
574 #endif /* CONFIG_IEEE80211BE */
575 ret = hostapd_driver_scan(iface->bss[0], ¶ms);
576 os_free(params.freqs);
577
578 if (ret == -EBUSY) {
579 wpa_printf(MSG_ERROR,
580 "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again",
581 ret, strerror(-ret));
582 iface->num_ht40_scan_tries = 1;
583 eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL);
584 eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL);
585 return 1;
586 }
587
588 if (ret < 0) {
589 wpa_printf(MSG_ERROR,
590 "Failed to request a scan of neighboring BSSes ret=%d (%s)",
591 ret, strerror(-ret));
592 return -1;
593 }
594
595 iface->scan_cb = ieee80211n_check_scan;
596 iface->bss[0]->scan_cookie = params.scan_cookie;
597 return 1;
598 }
599
600
ieee80211n_supported_ht_capab(struct hostapd_iface * iface)601 static int ieee80211n_supported_ht_capab(struct hostapd_iface *iface)
602 {
603 u16 hw = iface->current_mode->ht_capab;
604 u16 conf = iface->conf->ht_capab;
605
606 if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) &&
607 !(hw & HT_CAP_INFO_LDPC_CODING_CAP)) {
608 wpa_printf(MSG_ERROR, "Driver does not support configured "
609 "HT capability [LDPC]");
610 return 0;
611 }
612
613 /*
614 * Driver ACS chosen channel may not be HT40 due to internal driver
615 * restrictions.
616 */
617 if (!iface->conf->acs && (conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
618 !(hw & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) {
619 wpa_printf(MSG_ERROR, "Driver does not support configured "
620 "HT capability [HT40*]");
621 return 0;
622 }
623
624 if ((conf & HT_CAP_INFO_GREEN_FIELD) &&
625 !(hw & HT_CAP_INFO_GREEN_FIELD)) {
626 wpa_printf(MSG_ERROR, "Driver does not support configured "
627 "HT capability [GF]");
628 return 0;
629 }
630
631 if ((conf & HT_CAP_INFO_SHORT_GI20MHZ) &&
632 !(hw & HT_CAP_INFO_SHORT_GI20MHZ)) {
633 wpa_printf(MSG_ERROR, "Driver does not support configured "
634 "HT capability [SHORT-GI-20]");
635 return 0;
636 }
637
638 if ((conf & HT_CAP_INFO_SHORT_GI40MHZ) &&
639 !(hw & HT_CAP_INFO_SHORT_GI40MHZ)) {
640 wpa_printf(MSG_ERROR, "Driver does not support configured "
641 "HT capability [SHORT-GI-40]");
642 return 0;
643 }
644
645 if ((conf & HT_CAP_INFO_TX_STBC) && !(hw & HT_CAP_INFO_TX_STBC)) {
646 wpa_printf(MSG_ERROR, "Driver does not support configured "
647 "HT capability [TX-STBC]");
648 return 0;
649 }
650
651 if ((conf & HT_CAP_INFO_RX_STBC_MASK) >
652 (hw & HT_CAP_INFO_RX_STBC_MASK)) {
653 wpa_printf(MSG_ERROR, "Driver does not support configured "
654 "HT capability [RX-STBC*]");
655 return 0;
656 }
657
658 if ((conf & HT_CAP_INFO_DELAYED_BA) &&
659 !(hw & HT_CAP_INFO_DELAYED_BA)) {
660 wpa_printf(MSG_ERROR, "Driver does not support configured "
661 "HT capability [DELAYED-BA]");
662 return 0;
663 }
664
665 if ((conf & HT_CAP_INFO_MAX_AMSDU_SIZE) &&
666 !(hw & HT_CAP_INFO_MAX_AMSDU_SIZE)) {
667 wpa_printf(MSG_ERROR, "Driver does not support configured "
668 "HT capability [MAX-AMSDU-7935]");
669 return 0;
670 }
671
672 if ((conf & HT_CAP_INFO_DSSS_CCK40MHZ) &&
673 !(hw & HT_CAP_INFO_DSSS_CCK40MHZ)) {
674 wpa_printf(MSG_ERROR, "Driver does not support configured "
675 "HT capability [DSSS_CCK-40]");
676 return 0;
677 }
678
679 if ((conf & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT) &&
680 !(hw & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT)) {
681 wpa_printf(MSG_ERROR, "Driver does not support configured "
682 "HT capability [LSIG-TXOP-PROT]");
683 return 0;
684 }
685
686 return 1;
687 }
688
689
690 #ifdef CONFIG_IEEE80211AC
ieee80211ac_supported_vht_capab(struct hostapd_iface * iface)691 static int ieee80211ac_supported_vht_capab(struct hostapd_iface *iface)
692 {
693 struct hostapd_hw_modes *mode = iface->current_mode;
694 u32 hw = mode->vht_capab;
695 u32 conf = iface->conf->vht_capab;
696
697 wpa_printf(MSG_DEBUG, "hw vht capab: 0x%x, conf vht capab: 0x%x",
698 hw, conf);
699
700 if (mode->mode == HOSTAPD_MODE_IEEE80211G &&
701 iface->conf->bss[0]->vendor_vht &&
702 mode->vht_capab == 0 && iface->hw_features) {
703 int i;
704
705 for (i = 0; i < iface->num_hw_features; i++) {
706 if (iface->hw_features[i].mode ==
707 HOSTAPD_MODE_IEEE80211A) {
708 mode = &iface->hw_features[i];
709 hw = mode->vht_capab;
710 wpa_printf(MSG_DEBUG,
711 "update hw vht capab based on 5 GHz band: 0x%x",
712 hw);
713 break;
714 }
715 }
716 }
717
718 return ieee80211ac_cap_check(hw, conf);
719 }
720 #endif /* CONFIG_IEEE80211AC */
721
722
723 #ifdef CONFIG_IEEE80211AX
ieee80211ax_supported_he_capab(struct hostapd_iface * iface)724 static int ieee80211ax_supported_he_capab(struct hostapd_iface *iface)
725 {
726 return 1;
727 }
728 #endif /* CONFIG_IEEE80211AX */
729
730
hostapd_check_ht_capab(struct hostapd_iface * iface)731 int hostapd_check_ht_capab(struct hostapd_iface *iface)
732 {
733 int ret;
734
735 if (is_6ghz_freq(iface->freq))
736 return 0;
737 if (!iface->conf->ieee80211n)
738 return 0;
739
740 if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211B &&
741 iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G &&
742 (iface->conf->ht_capab & HT_CAP_INFO_DSSS_CCK40MHZ)) {
743 wpa_printf(MSG_DEBUG,
744 "Disable HT capability [DSSS_CCK-40] on 5 GHz band");
745 iface->conf->ht_capab &= ~HT_CAP_INFO_DSSS_CCK40MHZ;
746 }
747
748 if (!ieee80211n_supported_ht_capab(iface))
749 return -1;
750 #ifdef CONFIG_IEEE80211AX
751 if (iface->conf->ieee80211ax &&
752 !ieee80211ax_supported_he_capab(iface))
753 return -1;
754 #endif /* CONFIG_IEEE80211AX */
755 #ifdef CONFIG_IEEE80211AC
756 if (iface->conf->ieee80211ac &&
757 !ieee80211ac_supported_vht_capab(iface))
758 return -1;
759 #endif /* CONFIG_IEEE80211AC */
760 ret = ieee80211n_check_40mhz(iface);
761 if (ret)
762 return ret;
763 if (!ieee80211n_allowed_ht40_channel_pair(iface))
764 return -1;
765
766 return 0;
767 }
768
769
hostapd_check_edmg_capab(struct hostapd_iface * iface)770 int hostapd_check_edmg_capab(struct hostapd_iface *iface)
771 {
772 struct hostapd_hw_modes *mode = iface->hw_features;
773 struct ieee80211_edmg_config edmg;
774
775 if (!iface->conf->enable_edmg)
776 return 0;
777
778 hostapd_encode_edmg_chan(iface->conf->enable_edmg,
779 iface->conf->edmg_channel,
780 iface->conf->channel,
781 &edmg);
782
783 if (mode->edmg.channels && ieee802_edmg_is_allowed(mode->edmg, edmg))
784 return 0;
785
786 wpa_printf(MSG_WARNING, "Requested EDMG configuration is not valid");
787 wpa_printf(MSG_INFO, "EDMG capab: channels 0x%x, bw_config %d",
788 mode->edmg.channels, mode->edmg.bw_config);
789 wpa_printf(MSG_INFO,
790 "Requested EDMG configuration: channels 0x%x, bw_config %d",
791 edmg.channels, edmg.bw_config);
792 return -1;
793 }
794
795
hostapd_check_he_6ghz_capab(struct hostapd_iface * iface)796 int hostapd_check_he_6ghz_capab(struct hostapd_iface *iface)
797 {
798 #ifdef CONFIG_IEEE80211AX
799 struct he_capabilities *he_cap;
800 u16 hw;
801
802 if (!iface->current_mode || !is_6ghz_freq(iface->freq))
803 return 0;
804
805 he_cap = &iface->current_mode->he_capab[IEEE80211_MODE_AP];
806 hw = he_cap->he_6ghz_capa;
807 if (iface->conf->he_6ghz_max_mpdu >
808 ((hw & HE_6GHZ_BAND_CAP_MAX_MPDU_LEN_MASK) >>
809 HE_6GHZ_BAND_CAP_MAX_MPDU_LEN_SHIFT)) {
810 wpa_printf(MSG_ERROR,
811 "The driver does not support the configured HE 6 GHz Max MPDU length");
812 return -1;
813 }
814
815 if (iface->conf->he_6ghz_max_ampdu_len_exp >
816 ((hw & HE_6GHZ_BAND_CAP_MAX_AMPDU_LEN_EXP_MASK) >>
817 HE_6GHZ_BAND_CAP_MAX_AMPDU_LEN_EXP_SHIFT)) {
818 wpa_printf(MSG_ERROR,
819 "The driver does not support the configured HE 6 GHz Max AMPDU Length Exponent");
820 return -1;
821 }
822
823 if (iface->conf->he_6ghz_rx_ant_pat &&
824 !(hw & HE_6GHZ_BAND_CAP_RX_ANTPAT_CONS)) {
825 wpa_printf(MSG_ERROR,
826 "The driver does not support the configured HE 6 GHz Rx Antenna Pattern");
827 return -1;
828 }
829
830 if (iface->conf->he_6ghz_tx_ant_pat &&
831 !(hw & HE_6GHZ_BAND_CAP_TX_ANTPAT_CONS)) {
832 wpa_printf(MSG_ERROR,
833 "The driver does not support the configured HE 6 GHz Tx Antenna Pattern");
834 return -1;
835 }
836 #endif /* CONFIG_IEEE80211AX */
837 return 0;
838 }
839
840
841 /* Returns:
842 * 1 = usable
843 * 0 = not usable
844 * -1 = not currently usable due to 6 GHz NO-IR
845 */
hostapd_is_usable_chan(struct hostapd_iface * iface,int frequency,int primary)846 static int hostapd_is_usable_chan(struct hostapd_iface *iface,
847 int frequency, int primary)
848 {
849 struct hostapd_channel_data *chan;
850
851 if (!iface->current_mode)
852 return 0;
853
854 chan = hw_get_channel_freq(iface->current_mode->mode, frequency, NULL,
855 iface->hw_features, iface->num_hw_features);
856 if (!chan)
857 return 0;
858
859 if ((primary && chan_pri_allowed(chan)) ||
860 (!primary && !(chan->flag & HOSTAPD_CHAN_DISABLED)))
861 return 1;
862
863 wpa_printf(MSG_INFO,
864 "Frequency %d (%s) not allowed for AP mode, flags: 0x%x%s%s",
865 frequency, primary ? "primary" : "secondary",
866 chan->flag,
867 chan->flag & HOSTAPD_CHAN_NO_IR ? " NO-IR" : "",
868 chan->flag & HOSTAPD_CHAN_RADAR ? " RADAR" : "");
869
870 if (is_6ghz_freq(chan->freq) && (chan->flag & HOSTAPD_CHAN_NO_IR))
871 return -1;
872
873 return 0;
874 }
875
876
hostapd_is_usable_edmg(struct hostapd_iface * iface)877 static int hostapd_is_usable_edmg(struct hostapd_iface *iface)
878 {
879 int i, contiguous = 0;
880 int num_of_enabled = 0;
881 int max_contiguous = 0;
882 int err;
883 struct ieee80211_edmg_config edmg;
884 struct hostapd_channel_data *pri_chan;
885
886 if (!iface->conf->enable_edmg)
887 return 1;
888
889 if (!iface->current_mode)
890 return 0;
891 pri_chan = hw_get_channel_freq(iface->current_mode->mode,
892 iface->freq, NULL,
893 iface->hw_features,
894 iface->num_hw_features);
895 if (!pri_chan)
896 return 0;
897 hostapd_encode_edmg_chan(iface->conf->enable_edmg,
898 iface->conf->edmg_channel,
899 pri_chan->chan,
900 &edmg);
901 if (!(edmg.channels & BIT(pri_chan->chan - 1)))
902 return 0;
903
904 /* 60 GHz channels 1..6 */
905 for (i = 0; i < 6; i++) {
906 int freq = 56160 + 2160 * (i + 1);
907
908 if (edmg.channels & BIT(i)) {
909 contiguous++;
910 num_of_enabled++;
911 } else {
912 contiguous = 0;
913 continue;
914 }
915
916 /* P802.11ay defines that the total number of subfields
917 * set to one does not exceed 4.
918 */
919 if (num_of_enabled > 4)
920 return 0;
921
922 err = hostapd_is_usable_chan(iface, freq, 1);
923 if (err <= 0)
924 return err;
925
926 if (contiguous > max_contiguous)
927 max_contiguous = contiguous;
928 }
929
930 /* Check if the EDMG configuration is valid under the limitations
931 * of P802.11ay.
932 */
933 /* check bw_config against contiguous EDMG channels */
934 switch (edmg.bw_config) {
935 case EDMG_BW_CONFIG_4:
936 if (!max_contiguous)
937 return 0;
938 break;
939 case EDMG_BW_CONFIG_5:
940 if (max_contiguous < 2)
941 return 0;
942 break;
943 default:
944 return 0;
945 }
946
947 return 1;
948 }
949
950
hostapd_is_usable_punct_bitmap(struct hostapd_iface * iface)951 static bool hostapd_is_usable_punct_bitmap(struct hostapd_iface *iface)
952 {
953 #ifdef CONFIG_IEEE80211BE
954 struct hostapd_config *conf = iface->conf;
955 u16 bw;
956 u8 start_chan;
957
958 if (!conf->punct_bitmap)
959 return true;
960
961 if (!conf->ieee80211be) {
962 wpa_printf(MSG_ERROR,
963 "Currently RU puncturing is supported only if ieee80211be is enabled");
964 return false;
965 }
966
967 if (iface->freq >= 2412 && iface->freq <= 2484) {
968 wpa_printf(MSG_ERROR,
969 "RU puncturing not supported in 2.4 GHz");
970 return false;
971 }
972
973 /*
974 * In the 6 GHz band, eht_oper_chwidth is ignored. Use operating class
975 * to determine channel width.
976 */
977 if (conf->op_class == 137) {
978 bw = 320;
979 start_chan = conf->eht_oper_centr_freq_seg0_idx - 30;
980 } else {
981 switch (conf->eht_oper_chwidth) {
982 case 0:
983 wpa_printf(MSG_ERROR,
984 "RU puncturing is supported only in 80 MHz and 160 MHz");
985 return false;
986 case 1:
987 bw = 80;
988 start_chan = conf->eht_oper_centr_freq_seg0_idx - 6;
989 break;
990 case 2:
991 bw = 160;
992 start_chan = conf->eht_oper_centr_freq_seg0_idx - 14;
993 break;
994 default:
995 return false;
996 }
997 }
998
999 if (!is_punct_bitmap_valid(bw, (conf->channel - start_chan) / 4,
1000 conf->punct_bitmap)) {
1001 wpa_printf(MSG_ERROR, "Invalid puncturing bitmap");
1002 return false;
1003 }
1004 #endif /* CONFIG_IEEE80211BE */
1005
1006 return true;
1007 }
1008
1009
1010 /* Returns:
1011 * 1 = usable
1012 * 0 = not usable
1013 * -1 = not currently usable due to 6 GHz NO-IR
1014 */
hostapd_is_usable_chans(struct hostapd_iface * iface)1015 static int hostapd_is_usable_chans(struct hostapd_iface *iface)
1016 {
1017 int secondary_freq;
1018 struct hostapd_channel_data *pri_chan;
1019 int err, err2;
1020
1021 if (!iface->current_mode)
1022 return 0;
1023 pri_chan = hw_get_channel_freq(iface->current_mode->mode,
1024 iface->freq, NULL,
1025 iface->hw_features,
1026 iface->num_hw_features);
1027 if (!pri_chan) {
1028 wpa_printf(MSG_ERROR, "Primary frequency not present");
1029 return 0;
1030 }
1031
1032 err = hostapd_is_usable_chan(iface, pri_chan->freq, 1);
1033 if (err <= 0) {
1034 wpa_printf(MSG_ERROR, "Primary frequency not allowed");
1035 return err;
1036 }
1037 err = hostapd_is_usable_edmg(iface);
1038 if (err <= 0)
1039 return err;
1040
1041 if (!hostapd_is_usable_punct_bitmap(iface))
1042 return 0;
1043
1044 if (!iface->conf->secondary_channel)
1045 return 1;
1046
1047 err = hostapd_is_usable_chan(iface, iface->freq +
1048 iface->conf->secondary_channel * 20, 0);
1049 if (err > 0) {
1050 if (iface->conf->secondary_channel == 1 &&
1051 (pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P))
1052 return 1;
1053 if (iface->conf->secondary_channel == -1 &&
1054 (pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40M))
1055 return 1;
1056 }
1057 if (!iface->conf->ht40_plus_minus_allowed)
1058 return err;
1059
1060 /* Both HT40+ and HT40- are set, pick a valid secondary channel */
1061 secondary_freq = iface->freq + 20;
1062 err2 = hostapd_is_usable_chan(iface, secondary_freq, 0);
1063 if (err2 > 0 && (pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P)) {
1064 iface->conf->secondary_channel = 1;
1065 return 1;
1066 }
1067
1068 secondary_freq = iface->freq - 20;
1069 err2 = hostapd_is_usable_chan(iface, secondary_freq, 0);
1070 if (err2 > 0 && (pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40M)) {
1071 iface->conf->secondary_channel = -1;
1072 return 1;
1073 }
1074
1075 return err;
1076 }
1077
1078
skip_mode(struct hostapd_iface * iface,struct hostapd_hw_modes * mode)1079 static bool skip_mode(struct hostapd_iface *iface,
1080 struct hostapd_hw_modes *mode)
1081 {
1082 int chan;
1083
1084 if (iface->freq > 0 && !hw_mode_get_channel(mode, iface->freq, &chan))
1085 return true;
1086
1087 if (is_6ghz_op_class(iface->conf->op_class) && iface->freq == 0 &&
1088 !mode->is_6ghz)
1089 return true;
1090
1091 return false;
1092 }
1093
1094
hostapd_determine_mode(struct hostapd_iface * iface)1095 int hostapd_determine_mode(struct hostapd_iface *iface)
1096 {
1097 int i;
1098 enum hostapd_hw_mode target_mode;
1099
1100 if (iface->current_mode ||
1101 iface->conf->hw_mode != HOSTAPD_MODE_IEEE80211ANY)
1102 return 0;
1103
1104 if (iface->freq < 4000)
1105 target_mode = HOSTAPD_MODE_IEEE80211G;
1106 else if (iface->freq > 50000)
1107 target_mode = HOSTAPD_MODE_IEEE80211AD;
1108 else
1109 target_mode = HOSTAPD_MODE_IEEE80211A;
1110
1111 for (i = 0; i < iface->num_hw_features; i++) {
1112 struct hostapd_hw_modes *mode;
1113
1114 mode = &iface->hw_features[i];
1115 if (mode->mode == target_mode) {
1116 if (skip_mode(iface, mode))
1117 continue;
1118
1119 iface->current_mode = mode;
1120 iface->conf->hw_mode = mode->mode;
1121 break;
1122 }
1123 }
1124
1125 if (!iface->current_mode) {
1126 wpa_printf(MSG_ERROR, "ACS/CSA: Cannot decide mode");
1127 return -1;
1128 }
1129 return 0;
1130 }
1131
1132
1133 static enum hostapd_chan_status
hostapd_check_chans(struct hostapd_iface * iface)1134 hostapd_check_chans(struct hostapd_iface *iface)
1135 {
1136 if (iface->freq) {
1137 int err;
1138
1139 hostapd_determine_mode(iface);
1140
1141 err = hostapd_is_usable_chans(iface);
1142 if (err <= 0) {
1143 #ifdef __ZEPHYR__
1144 supplicant_send_wifi_mgmt_ap_status(iface->owner,
1145 NET_EVENT_WIFI_CMD_AP_ENABLE_RESULT,
1146 WIFI_STATUS_AP_CHANNEL_NOT_ALLOWED);
1147 #endif /* __ZEPHYR__ */
1148 if (!err)
1149 return HOSTAPD_CHAN_INVALID;
1150 return HOSTAPD_CHAN_INVALID_NO_IR;
1151 }
1152 return HOSTAPD_CHAN_VALID;
1153 }
1154
1155 /*
1156 * The user set channel=0 or channel=acs_survey
1157 * which is used to trigger ACS.
1158 */
1159
1160 switch (acs_init(iface)) {
1161 case HOSTAPD_CHAN_ACS:
1162 return HOSTAPD_CHAN_ACS;
1163 case HOSTAPD_CHAN_INVALID_NO_IR:
1164 return HOSTAPD_CHAN_INVALID_NO_IR;
1165 case HOSTAPD_CHAN_VALID:
1166 case HOSTAPD_CHAN_INVALID:
1167 default:
1168 #ifdef __ZEPHYR__
1169 supplicant_send_wifi_mgmt_ap_status(iface->owner,
1170 NET_EVENT_WIFI_CMD_AP_ENABLE_RESULT,
1171 WIFI_STATUS_AP_CHANNEL_NOT_ALLOWED);
1172 #endif /* __ZEPHYR__ */
1173 return HOSTAPD_CHAN_INVALID;
1174 }
1175 }
1176
1177
hostapd_notify_bad_chans(struct hostapd_iface * iface)1178 static void hostapd_notify_bad_chans(struct hostapd_iface *iface)
1179 {
1180 if (!iface->current_mode) {
1181 hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
1182 HOSTAPD_LEVEL_WARNING,
1183 "Hardware does not support configured mode");
1184 return;
1185 }
1186 hostapd_logger(iface->bss[0], NULL,
1187 HOSTAPD_MODULE_IEEE80211,
1188 HOSTAPD_LEVEL_WARNING,
1189 "Configured channel (%d) or frequency (%d) (secondary_channel=%d) not found from the channel list of the current mode (%d) %s",
1190 iface->conf->channel,
1191 iface->freq, iface->conf->secondary_channel,
1192 iface->current_mode->mode,
1193 hostapd_hw_mode_txt(iface->current_mode->mode));
1194 hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
1195 HOSTAPD_LEVEL_WARNING,
1196 "Hardware does not support configured channel");
1197 }
1198
1199
hostapd_acs_completed(struct hostapd_iface * iface,int err)1200 int hostapd_acs_completed(struct hostapd_iface *iface, int err)
1201 {
1202 int ret = -1;
1203
1204 if (err)
1205 goto out;
1206
1207 switch (hostapd_check_chans(iface)) {
1208 case HOSTAPD_CHAN_VALID:
1209 iface->is_no_ir = false;
1210 wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO,
1211 ACS_EVENT_COMPLETED "freq=%d channel=%d",
1212 iface->freq, iface->conf->channel);
1213 break;
1214 case HOSTAPD_CHAN_ACS:
1215 wpa_printf(MSG_ERROR, "ACS error - reported complete, but no result available");
1216 wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED);
1217 hostapd_notify_bad_chans(iface);
1218 goto out;
1219 case HOSTAPD_CHAN_INVALID_NO_IR:
1220 iface->is_no_ir = true;
1221 /* fall through */
1222 case HOSTAPD_CHAN_INVALID:
1223 default:
1224 wpa_printf(MSG_ERROR, "ACS picked unusable channels");
1225 wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED);
1226 hostapd_notify_bad_chans(iface);
1227 goto out;
1228 }
1229
1230 ret = hostapd_check_ht_capab(iface);
1231 if (ret < 0)
1232 goto out;
1233 if (ret == 1) {
1234 wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback");
1235 return 0;
1236 }
1237
1238 ret = 0;
1239 out:
1240 return hostapd_setup_interface_complete(iface, ret);
1241 }
1242
1243
1244 /**
1245 * hostapd_csa_update_hwmode - Update hardware mode
1246 * @iface: Pointer to interface data.
1247 * Returns: 0 on success, < 0 on failure
1248 *
1249 * Update hardware mode when the operating channel changed because of CSA.
1250 */
hostapd_csa_update_hwmode(struct hostapd_iface * iface)1251 int hostapd_csa_update_hwmode(struct hostapd_iface *iface)
1252 {
1253 if (!iface || !iface->conf)
1254 return -1;
1255
1256 iface->current_mode = NULL;
1257 iface->conf->hw_mode = HOSTAPD_MODE_IEEE80211ANY;
1258
1259 return hostapd_determine_mode(iface);
1260 }
1261
1262
1263 /**
1264 * hostapd_select_hw_mode - Select the hardware mode
1265 * @iface: Pointer to interface data.
1266 * Returns: 0 on success, < 0 on failure
1267 *
1268 * Sets up the hardware mode, channel, rates, and passive scanning
1269 * based on the configuration.
1270 */
hostapd_select_hw_mode(struct hostapd_iface * iface)1271 int hostapd_select_hw_mode(struct hostapd_iface *iface)
1272 {
1273 int i;
1274
1275 if (iface->num_hw_features < 1)
1276 return -1;
1277
1278 if ((iface->conf->hw_mode == HOSTAPD_MODE_IEEE80211G ||
1279 iface->conf->ieee80211n || iface->conf->ieee80211ac ||
1280 iface->conf->ieee80211ax || iface->conf->ieee80211be) &&
1281 iface->conf->channel == 14) {
1282 wpa_printf(MSG_INFO, "Disable OFDM/HT/VHT/HE/EHT on channel 14");
1283 iface->conf->hw_mode = HOSTAPD_MODE_IEEE80211B;
1284 iface->conf->ieee80211n = 0;
1285 iface->conf->ieee80211ac = 0;
1286 iface->conf->ieee80211ax = 0;
1287 iface->conf->ieee80211be = 0;
1288 }
1289
1290 iface->current_mode = NULL;
1291 for (i = 0; i < iface->num_hw_features; i++) {
1292 struct hostapd_hw_modes *mode = &iface->hw_features[i];
1293
1294 if (mode->mode == iface->conf->hw_mode) {
1295 if (skip_mode(iface, mode))
1296 continue;
1297
1298 iface->current_mode = mode;
1299 break;
1300 }
1301 }
1302
1303 if (iface->current_mode == NULL) {
1304 if ((iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) &&
1305 (iface->drv_flags & WPA_DRIVER_FLAGS_SUPPORT_HW_MODE_ANY)) {
1306 wpa_printf(MSG_DEBUG,
1307 "Using offloaded hw_mode=any ACS");
1308 } else if (!(iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) &&
1309 iface->conf->hw_mode == HOSTAPD_MODE_IEEE80211ANY) {
1310 wpa_printf(MSG_DEBUG,
1311 "Using internal ACS for hw_mode=any");
1312 } else {
1313 wpa_printf(MSG_ERROR,
1314 "Hardware does not support configured mode");
1315 hostapd_logger(iface->bss[0], NULL,
1316 HOSTAPD_MODULE_IEEE80211,
1317 HOSTAPD_LEVEL_WARNING,
1318 "Hardware does not support configured mode (%d) (hw_mode in hostapd.conf)",
1319 (int) iface->conf->hw_mode);
1320 #ifdef __ZEPHYR__
1321 supplicant_send_wifi_mgmt_ap_status(iface->owner,
1322 NET_EVENT_WIFI_CMD_AP_ENABLE_RESULT,
1323 WIFI_STATUS_AP_CHANNEL_NOT_SUPPORTED);
1324 #endif /* __ZEPHYR__ */
1325 return -2;
1326 }
1327 }
1328
1329 switch (hostapd_check_chans(iface)) {
1330 case HOSTAPD_CHAN_VALID:
1331 iface->is_no_ir = false;
1332 return 0;
1333 case HOSTAPD_CHAN_ACS: /* ACS will run and later complete */
1334 return 1;
1335 case HOSTAPD_CHAN_INVALID_NO_IR:
1336 iface->is_no_ir = true;
1337 /* fall through */
1338 case HOSTAPD_CHAN_INVALID:
1339 default:
1340 hostapd_notify_bad_chans(iface);
1341 return -3;
1342 }
1343 }
1344
1345
hostapd_hw_mode_txt(int mode)1346 const char * hostapd_hw_mode_txt(int mode)
1347 {
1348 switch (mode) {
1349 case HOSTAPD_MODE_IEEE80211A:
1350 return "IEEE 802.11a";
1351 case HOSTAPD_MODE_IEEE80211B:
1352 return "IEEE 802.11b";
1353 case HOSTAPD_MODE_IEEE80211G:
1354 return "IEEE 802.11g";
1355 case HOSTAPD_MODE_IEEE80211AD:
1356 return "IEEE 802.11ad";
1357 default:
1358 return "UNKNOWN";
1359 }
1360 }
1361
1362
hostapd_hw_get_freq(struct hostapd_data * hapd,int chan)1363 int hostapd_hw_get_freq(struct hostapd_data *hapd, int chan)
1364 {
1365 return hw_get_freq(hapd->iface->current_mode, chan);
1366 }
1367
1368
hostapd_hw_get_channel(struct hostapd_data * hapd,int freq)1369 int hostapd_hw_get_channel(struct hostapd_data *hapd, int freq)
1370 {
1371 int i, channel;
1372 struct hostapd_hw_modes *mode;
1373
1374 if (hapd->iface->current_mode) {
1375 channel = hw_get_chan(hapd->iface->current_mode->mode, freq,
1376 hapd->iface->hw_features,
1377 hapd->iface->num_hw_features);
1378 if (channel)
1379 return channel;
1380 }
1381
1382 /* Check other available modes since the channel list for the current
1383 * mode did not include the specified frequency. */
1384 if (!hapd->iface->hw_features)
1385 return 0;
1386 for (i = 0; i < hapd->iface->num_hw_features; i++) {
1387 mode = &hapd->iface->hw_features[i];
1388 channel = hw_get_chan(mode->mode, freq,
1389 hapd->iface->hw_features,
1390 hapd->iface->num_hw_features);
1391 if (channel)
1392 return channel;
1393 }
1394 return 0;
1395 }
1396
1397
hostapd_hw_skip_mode(struct hostapd_iface * iface,struct hostapd_hw_modes * mode)1398 int hostapd_hw_skip_mode(struct hostapd_iface *iface,
1399 struct hostapd_hw_modes *mode)
1400 {
1401 int i;
1402
1403 if (iface->current_mode)
1404 return mode != iface->current_mode;
1405 if (mode->mode != HOSTAPD_MODE_IEEE80211B)
1406 return 0;
1407 for (i = 0; i < iface->num_hw_features; i++) {
1408 if (iface->hw_features[i].mode == HOSTAPD_MODE_IEEE80211G)
1409 return 1;
1410 }
1411 return 0;
1412 }
1413
