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
hostapd_free_hw_features(struct hostapd_hw_modes * hw_features,size_t num_hw_features)28 void hostapd_free_hw_features(struct hostapd_hw_modes *hw_features,
29 size_t num_hw_features)
30 {
31 size_t i;
32
33 if (hw_features == NULL)
34 return;
35
36 for (i = 0; i < num_hw_features; i++) {
37 os_free(hw_features[i].channels);
38 os_free(hw_features[i].rates);
39 }
40
41 os_free(hw_features);
42 }
43
44
45 #ifndef CONFIG_NO_STDOUT_DEBUG
dfs_info(struct hostapd_channel_data * chan)46 static char * dfs_info(struct hostapd_channel_data *chan)
47 {
48 static char info[256];
49 char *state;
50
51 switch (chan->flag & HOSTAPD_CHAN_DFS_MASK) {
52 case HOSTAPD_CHAN_DFS_UNKNOWN:
53 state = "unknown";
54 break;
55 case HOSTAPD_CHAN_DFS_USABLE:
56 state = "usable";
57 break;
58 case HOSTAPD_CHAN_DFS_UNAVAILABLE:
59 state = "unavailable";
60 break;
61 case HOSTAPD_CHAN_DFS_AVAILABLE:
62 state = "available";
63 break;
64 default:
65 return "";
66 }
67 os_snprintf(info, sizeof(info), " (DFS state = %s)", state);
68 info[sizeof(info) - 1] = '\0';
69
70 return info;
71 }
72 #endif /* CONFIG_NO_STDOUT_DEBUG */
73
74
hostapd_get_hw_features(struct hostapd_iface * iface)75 int hostapd_get_hw_features(struct hostapd_iface *iface)
76 {
77 struct hostapd_data *hapd = iface->bss[0];
78 int i, j;
79 u16 num_modes, flags;
80 struct hostapd_hw_modes *modes;
81 u8 dfs_domain;
82 enum hostapd_hw_mode mode = HOSTAPD_MODE_IEEE80211ANY;
83 bool is_6ghz = false;
84 bool orig_mode_valid = false;
85
86 if (hostapd_drv_none(hapd))
87 return -1;
88 modes = hostapd_get_hw_feature_data(hapd, &num_modes, &flags,
89 &dfs_domain);
90 if (modes == NULL) {
91 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
92 HOSTAPD_LEVEL_DEBUG,
93 "Fetching hardware channel/rate support not "
94 "supported.");
95 return -1;
96 }
97
98 iface->hw_flags = flags;
99 iface->dfs_domain = dfs_domain;
100
101 if (iface->current_mode) {
102 /*
103 * Received driver event CHANNEL_LIST_CHANGED when the current
104 * hw mode is valid. Clear iface->current_mode temporarily as
105 * the mode instance will be replaced with a new instance and
106 * the current pointer would be pointing to freed memory.
107 */
108 orig_mode_valid = true;
109 mode = iface->current_mode->mode;
110 is_6ghz = iface->current_mode->is_6ghz;
111 iface->current_mode = NULL;
112 }
113 hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
114 iface->hw_features = modes;
115 iface->num_hw_features = num_modes;
116
117 for (i = 0; i < num_modes; i++) {
118 struct hostapd_hw_modes *feature = &modes[i];
119 int dfs_enabled = hapd->iconf->ieee80211h &&
120 (iface->drv_flags & WPA_DRIVER_FLAGS_RADAR);
121
122 /* Restore orignal mode if possible */
123 if (orig_mode_valid && feature->mode == mode &&
124 feature->num_channels > 0 &&
125 is_6ghz == is_6ghz_freq(feature->channels[0].freq))
126 iface->current_mode = feature;
127
128 /* set flag for channels we can use in current regulatory
129 * domain */
130 for (j = 0; j < feature->num_channels; j++) {
131 int dfs = 0;
132
133 /*
134 * Disable all channels that are marked not to allow
135 * to initiate radiation (a.k.a. passive scan and no
136 * IBSS).
137 * Use radar channels only if the driver supports DFS.
138 */
139 if ((feature->channels[j].flag &
140 HOSTAPD_CHAN_RADAR) && dfs_enabled) {
141 dfs = 1;
142 } else if (((feature->channels[j].flag &
143 HOSTAPD_CHAN_RADAR) &&
144 !(iface->drv_flags &
145 WPA_DRIVER_FLAGS_DFS_OFFLOAD)) ||
146 (feature->channels[j].flag &
147 HOSTAPD_CHAN_NO_IR)) {
148 feature->channels[j].flag |=
149 HOSTAPD_CHAN_DISABLED;
150 }
151
152 if (feature->channels[j].flag & HOSTAPD_CHAN_DISABLED)
153 continue;
154
155 wpa_printf(MSG_MSGDUMP, "Allowed channel: mode=%d "
156 "chan=%d freq=%d MHz max_tx_power=%d dBm%s",
157 feature->mode,
158 feature->channels[j].chan,
159 feature->channels[j].freq,
160 feature->channels[j].max_tx_power,
161 dfs ? dfs_info(&feature->channels[j]) : "");
162 }
163 }
164
165 if (orig_mode_valid && !iface->current_mode) {
166 wpa_printf(MSG_ERROR,
167 "%s: Could not update iface->current_mode",
168 __func__);
169 }
170
171 return 0;
172 }
173
174
hostapd_prepare_rates(struct hostapd_iface * iface,struct hostapd_hw_modes * mode)175 int hostapd_prepare_rates(struct hostapd_iface *iface,
176 struct hostapd_hw_modes *mode)
177 {
178 int i, num_basic_rates = 0;
179 int basic_rates_a[] = { 60, 120, 240, -1 };
180 int basic_rates_b[] = { 10, 20, -1 };
181 int basic_rates_g[] = { 10, 20, 55, 110, -1 };
182 int *basic_rates;
183
184 if (iface->conf->basic_rates)
185 basic_rates = iface->conf->basic_rates;
186 else switch (mode->mode) {
187 case HOSTAPD_MODE_IEEE80211A:
188 basic_rates = basic_rates_a;
189 break;
190 case HOSTAPD_MODE_IEEE80211B:
191 basic_rates = basic_rates_b;
192 break;
193 case HOSTAPD_MODE_IEEE80211G:
194 basic_rates = basic_rates_g;
195 break;
196 case HOSTAPD_MODE_IEEE80211AD:
197 return 0; /* No basic rates for 11ad */
198 default:
199 return -1;
200 }
201
202 i = 0;
203 while (basic_rates[i] >= 0)
204 i++;
205 if (i)
206 i++; /* -1 termination */
207 os_free(iface->basic_rates);
208 iface->basic_rates = os_malloc(i * sizeof(int));
209 if (iface->basic_rates)
210 os_memcpy(iface->basic_rates, basic_rates, i * sizeof(int));
211
212 os_free(iface->current_rates);
213 iface->num_rates = 0;
214
215 iface->current_rates =
216 os_calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
217 if (!iface->current_rates) {
218 wpa_printf(MSG_ERROR, "Failed to allocate memory for rate "
219 "table.");
220 return -1;
221 }
222
223 for (i = 0; i < mode->num_rates; i++) {
224 struct hostapd_rate_data *rate;
225
226 if (iface->conf->supported_rates &&
227 !hostapd_rate_found(iface->conf->supported_rates,
228 mode->rates[i]))
229 continue;
230
231 rate = &iface->current_rates[iface->num_rates];
232 rate->rate = mode->rates[i];
233 if (hostapd_rate_found(basic_rates, rate->rate)) {
234 rate->flags |= HOSTAPD_RATE_BASIC;
235 num_basic_rates++;
236 }
237 wpa_printf(MSG_EXCESSIVE, "RATE[%d] rate=%d flags=0x%x",
238 iface->num_rates, rate->rate, rate->flags);
239 iface->num_rates++;
240 }
241
242 if ((iface->num_rates == 0 || num_basic_rates == 0) &&
243 (!iface->conf->ieee80211n || !iface->conf->require_ht)) {
244 wpa_printf(MSG_ERROR, "No rates remaining in supported/basic "
245 "rate sets (%d,%d).",
246 iface->num_rates, num_basic_rates);
247 return -1;
248 }
249
250 return 0;
251 }
252
253
ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface * iface)254 static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface)
255 {
256 int pri_freq, sec_freq;
257 struct hostapd_channel_data *p_chan, *s_chan;
258
259 #ifdef CONFIG_OHOS_P2P
260 if (!iface->conf->secondary_channel) {
261 return 1; // HT40 not used.
262 }
263 #endif
264 pri_freq = iface->freq;
265 sec_freq = pri_freq + iface->conf->secondary_channel * 20;
266
267 if (!iface->current_mode)
268 return 0;
269
270 p_chan = hw_get_channel_freq(iface->current_mode->mode, pri_freq, NULL,
271 iface->hw_features,
272 iface->num_hw_features);
273
274 s_chan = hw_get_channel_freq(iface->current_mode->mode, sec_freq, NULL,
275 iface->hw_features,
276 iface->num_hw_features);
277
278 return allowed_ht40_channel_pair(iface->current_mode->mode,
279 p_chan, s_chan);
280 }
281
282
ieee80211n_switch_pri_sec(struct hostapd_iface * iface)283 static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface)
284 {
285 if (iface->conf->secondary_channel > 0) {
286 iface->conf->channel += 4;
287 iface->freq += 20;
288 iface->conf->secondary_channel = -1;
289 } else {
290 iface->conf->channel -= 4;
291 iface->freq -= 20;
292 iface->conf->secondary_channel = 1;
293 }
294 }
295
296
ieee80211n_check_40mhz_5g(struct hostapd_iface * iface,struct wpa_scan_results * scan_res)297 static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface,
298 struct wpa_scan_results *scan_res)
299 {
300 unsigned int pri_freq, sec_freq;
301 int res;
302 struct hostapd_channel_data *pri_chan, *sec_chan;
303
304 pri_freq = iface->freq;
305 sec_freq = pri_freq + iface->conf->secondary_channel * 20;
306
307 if (!iface->current_mode)
308 return 0;
309 pri_chan = hw_get_channel_freq(iface->current_mode->mode, pri_freq,
310 NULL, iface->hw_features,
311 iface->num_hw_features);
312 sec_chan = hw_get_channel_freq(iface->current_mode->mode, sec_freq,
313 NULL, iface->hw_features,
314 iface->num_hw_features);
315
316 res = check_40mhz_5g(scan_res, pri_chan, sec_chan);
317
318 if (res == 2) {
319 if (iface->conf->no_pri_sec_switch) {
320 wpa_printf(MSG_DEBUG,
321 "Cannot switch PRI/SEC channels due to local constraint");
322 } else {
323 ieee80211n_switch_pri_sec(iface);
324 }
325 }
326
327 return !!res;
328 }
329
330
ieee80211n_check_40mhz_2g4(struct hostapd_iface * iface,struct wpa_scan_results * scan_res)331 static int ieee80211n_check_40mhz_2g4(struct hostapd_iface *iface,
332 struct wpa_scan_results *scan_res)
333 {
334 int pri_chan, sec_chan;
335
336 pri_chan = iface->conf->channel;
337 sec_chan = pri_chan + iface->conf->secondary_channel * 4;
338
339 return check_40mhz_2g4(iface->current_mode, scan_res, pri_chan,
340 sec_chan);
341 }
342
343
ieee80211n_check_scan(struct hostapd_iface * iface)344 static void ieee80211n_check_scan(struct hostapd_iface *iface)
345 {
346 struct wpa_scan_results *scan_res;
347 int oper40;
348 int res = 0;
349
350 /* Check list of neighboring BSSes (from scan) to see whether 40 MHz is
351 * allowed per IEEE Std 802.11-2012, 10.15.3.2 */
352
353 iface->scan_cb = NULL;
354
355 scan_res = hostapd_driver_get_scan_results(iface->bss[0]);
356 if (scan_res == NULL) {
357 hostapd_setup_interface_complete(iface, 1);
358 return;
359 }
360
361 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A)
362 oper40 = ieee80211n_check_40mhz_5g(iface, scan_res);
363 else
364 oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res);
365 wpa_scan_results_free(scan_res);
366
367 iface->secondary_ch = iface->conf->secondary_channel;
368 if (!oper40) {
369 wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on "
370 "channel pri=%d sec=%d based on overlapping BSSes",
371 iface->conf->channel,
372 iface->conf->channel +
373 iface->conf->secondary_channel * 4);
374 iface->conf->secondary_channel = 0;
375 if (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX) {
376 /*
377 * TODO: Could consider scheduling another scan to check
378 * if channel width can be changed if no coex reports
379 * are received from associating stations.
380 */
381 }
382 }
383
384 #ifdef CONFIG_IEEE80211AX
385 if (iface->conf->secondary_channel &&
386 iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
387 iface->conf->ieee80211ax) {
388 struct he_capabilities *he_cap;
389
390 he_cap = &iface->current_mode->he_capab[IEEE80211_MODE_AP];
391 if (!(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
392 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_IN_2G)) {
393 wpa_printf(MSG_DEBUG,
394 "HE: 40 MHz channel width is not supported in 2.4 GHz; clear secondary channel configuration");
395 iface->conf->secondary_channel = 0;
396 }
397 }
398 #endif /* CONFIG_IEEE80211AX */
399
400 if (iface->conf->secondary_channel)
401 res = ieee80211n_allowed_ht40_channel_pair(iface);
402 if (!res) {
403 iface->conf->secondary_channel = 0;
404 hostapd_set_oper_centr_freq_seg0_idx(iface->conf, 0);
405 hostapd_set_oper_centr_freq_seg1_idx(iface->conf, 0);
406 hostapd_set_oper_chwidth(iface->conf, CONF_OPER_CHWIDTH_USE_HT);
407 res = 1;
408 wpa_printf(MSG_INFO, "Fallback to 20 MHz");
409 }
410
411 hostapd_setup_interface_complete(iface, !res);
412 }
413
414
ieee80211n_scan_channels_2g4(struct hostapd_iface * iface,struct wpa_driver_scan_params * params)415 static void ieee80211n_scan_channels_2g4(struct hostapd_iface *iface,
416 struct wpa_driver_scan_params *params)
417 {
418 /* Scan only the affected frequency range */
419 int pri_freq, sec_freq;
420 int affected_start, affected_end;
421 int i, pos;
422 struct hostapd_hw_modes *mode;
423
424 if (iface->current_mode == NULL)
425 return;
426
427 pri_freq = iface->freq;
428 if (iface->conf->secondary_channel > 0)
429 sec_freq = pri_freq + 20;
430 else
431 sec_freq = pri_freq - 20;
432 /*
433 * Note: Need to find the PRI channel also in cases where the affected
434 * channel is the SEC channel of a 40 MHz BSS, so need to include the
435 * scanning coverage here to be 40 MHz from the center frequency.
436 */
437 affected_start = (pri_freq + sec_freq) / 2 - 40;
438 affected_end = (pri_freq + sec_freq) / 2 + 40;
439 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
440 affected_start, affected_end);
441
442 mode = iface->current_mode;
443 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
444 if (params->freqs == NULL)
445 return;
446 pos = 0;
447
448 for (i = 0; i < mode->num_channels; i++) {
449 struct hostapd_channel_data *chan = &mode->channels[i];
450 if (chan->flag & HOSTAPD_CHAN_DISABLED)
451 continue;
452 if (chan->freq < affected_start ||
453 chan->freq > affected_end)
454 continue;
455 params->freqs[pos++] = chan->freq;
456 }
457 }
458
459
ieee80211n_scan_channels_5g(struct hostapd_iface * iface,struct wpa_driver_scan_params * params)460 static void ieee80211n_scan_channels_5g(struct hostapd_iface *iface,
461 struct wpa_driver_scan_params *params)
462 {
463 /* Scan only the affected frequency range */
464 int pri_freq;
465 int affected_start, affected_end;
466 int i, pos;
467 struct hostapd_hw_modes *mode;
468
469 if (iface->current_mode == NULL)
470 return;
471
472 pri_freq = iface->freq;
473 if (iface->conf->secondary_channel > 0) {
474 affected_start = pri_freq - 10;
475 affected_end = pri_freq + 30;
476 } else {
477 affected_start = pri_freq - 30;
478 affected_end = pri_freq + 10;
479 }
480 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
481 affected_start, affected_end);
482
483 mode = iface->current_mode;
484 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
485 if (params->freqs == NULL)
486 return;
487 pos = 0;
488
489 for (i = 0; i < mode->num_channels; i++) {
490 struct hostapd_channel_data *chan = &mode->channels[i];
491 if (chan->flag & HOSTAPD_CHAN_DISABLED)
492 continue;
493 if (chan->freq < affected_start ||
494 chan->freq > affected_end)
495 continue;
496 params->freqs[pos++] = chan->freq;
497 }
498 }
499
500
ap_ht40_scan_retry(void * eloop_data,void * user_data)501 static void ap_ht40_scan_retry(void *eloop_data, void *user_data)
502 {
503 #define HT2040_COEX_SCAN_RETRY 15
504 struct hostapd_iface *iface = eloop_data;
505 struct wpa_driver_scan_params params;
506 int ret;
507
508 os_memset(¶ms, 0, sizeof(params));
509 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
510 ieee80211n_scan_channels_2g4(iface, ¶ms);
511 else
512 ieee80211n_scan_channels_5g(iface, ¶ms);
513
514 params.link_id = -1;
515 #ifdef CONFIG_IEEE80211BE
516 if (iface->bss[0]->conf->mld_ap)
517 params.link_id = iface->bss[0]->mld_link_id;
518 #endif /* CONFIG_IEEE80211BE */
519
520 ret = hostapd_driver_scan(iface->bss[0], ¶ms);
521 iface->num_ht40_scan_tries++;
522 os_free(params.freqs);
523
524 if (ret == -EBUSY &&
525 iface->num_ht40_scan_tries < HT2040_COEX_SCAN_RETRY) {
526 wpa_printf(MSG_ERROR,
527 "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again (attempt %d)",
528 ret, strerror(-ret), iface->num_ht40_scan_tries);
529 eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL);
530 return;
531 }
532
533 if (ret == 0) {
534 iface->scan_cb = ieee80211n_check_scan;
535 iface->bss[0]->scan_cookie = params.scan_cookie;
536 return;
537 }
538
539 wpa_printf(MSG_DEBUG,
540 "Failed to request a scan in device, bringing up in HT20 mode");
541 iface->conf->secondary_channel = 0;
542 iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
543 hostapd_setup_interface_complete(iface, 0);
544 }
545
546
hostapd_stop_setup_timers(struct hostapd_iface * iface)547 void hostapd_stop_setup_timers(struct hostapd_iface *iface)
548 {
549 eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL);
550 }
551
552
ieee80211n_check_40mhz(struct hostapd_iface * iface)553 static int ieee80211n_check_40mhz(struct hostapd_iface *iface)
554 {
555 struct wpa_driver_scan_params params;
556 int ret;
557
558 /* Check that HT40 is used and PRI / SEC switch is allowed */
559 if (!iface->conf->secondary_channel || iface->conf->no_pri_sec_switch)
560 return 0;
561
562 hostapd_set_state(iface, HAPD_IFACE_HT_SCAN);
563 wpa_printf(MSG_EXCESSIVE, "Scan for neighboring BSSes prior to enabling "
564 "40 MHz channel");
565 os_memset(¶ms, 0, sizeof(params));
566 if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
567 ieee80211n_scan_channels_2g4(iface, ¶ms);
568 else
569 ieee80211n_scan_channels_5g(iface, ¶ms);
570
571 params.link_id = -1;
572 #ifdef CONFIG_IEEE80211BE
573 if (iface->bss[0]->conf->mld_ap)
574 params.link_id = iface->bss[0]->mld_link_id;
575 #endif /* CONFIG_IEEE80211BE */
576 ret = hostapd_driver_scan(iface->bss[0], ¶ms);
577 os_free(params.freqs);
578
579 if (ret == -EBUSY) {
580 wpa_printf(MSG_ERROR,
581 "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again",
582 ret, strerror(-ret));
583 iface->num_ht40_scan_tries = 1;
584 eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL);
585 eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL);
586 return 1;
587 }
588
589 if (ret < 0) {
590 wpa_printf(MSG_ERROR,
591 "Failed to request a scan of neighboring BSSes ret=%d (%s)",
592 ret, strerror(-ret));
593 return -1;
594 }
595
596 iface->scan_cb = ieee80211n_check_scan;
597 iface->bss[0]->scan_cookie = params.scan_cookie;
598 return 1;
599 }
600
601
ieee80211n_supported_ht_capab(struct hostapd_iface * iface)602 static int ieee80211n_supported_ht_capab(struct hostapd_iface *iface)
603 {
604 u16 hw = iface->current_mode->ht_capab;
605 u16 conf = iface->conf->ht_capab;
606
607 if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) &&
608 !(hw & HT_CAP_INFO_LDPC_CODING_CAP)) {
609 wpa_printf(MSG_ERROR, "Driver does not support configured "
610 "HT capability [LDPC]");
611 return 0;
612 }
613
614 /*
615 * Driver ACS chosen channel may not be HT40 due to internal driver
616 * restrictions.
617 */
618 if (!iface->conf->acs && (conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
619 !(hw & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) {
620 wpa_printf(MSG_ERROR, "Driver does not support configured "
621 "HT capability [HT40*]");
622 return 0;
623 }
624
625 if ((conf & HT_CAP_INFO_GREEN_FIELD) &&
626 !(hw & HT_CAP_INFO_GREEN_FIELD)) {
627 wpa_printf(MSG_ERROR, "Driver does not support configured "
628 "HT capability [GF]");
629 return 0;
630 }
631
632 if ((conf & HT_CAP_INFO_SHORT_GI20MHZ) &&
633 !(hw & HT_CAP_INFO_SHORT_GI20MHZ)) {
634 wpa_printf(MSG_ERROR, "Driver does not support configured "
635 "HT capability [SHORT-GI-20]");
636 return 0;
637 }
638
639 if ((conf & HT_CAP_INFO_SHORT_GI40MHZ) &&
640 !(hw & HT_CAP_INFO_SHORT_GI40MHZ)) {
641 wpa_printf(MSG_ERROR, "Driver does not support configured "
642 "HT capability [SHORT-GI-40]");
643 return 0;
644 }
645
646 if ((conf & HT_CAP_INFO_TX_STBC) && !(hw & HT_CAP_INFO_TX_STBC)) {
647 wpa_printf(MSG_ERROR, "Driver does not support configured "
648 "HT capability [TX-STBC]");
649 return 0;
650 }
651
652 if ((conf & HT_CAP_INFO_RX_STBC_MASK) >
653 (hw & HT_CAP_INFO_RX_STBC_MASK)) {
654 wpa_printf(MSG_ERROR, "Driver does not support configured "
655 "HT capability [RX-STBC*]");
656 return 0;
657 }
658
659 if ((conf & HT_CAP_INFO_DELAYED_BA) &&
660 !(hw & HT_CAP_INFO_DELAYED_BA)) {
661 wpa_printf(MSG_ERROR, "Driver does not support configured "
662 "HT capability [DELAYED-BA]");
663 return 0;
664 }
665
666 if ((conf & HT_CAP_INFO_MAX_AMSDU_SIZE) &&
667 !(hw & HT_CAP_INFO_MAX_AMSDU_SIZE)) {
668 wpa_printf(MSG_ERROR, "Driver does not support configured "
669 "HT capability [MAX-AMSDU-7935]");
670 return 0;
671 }
672
673 if ((conf & HT_CAP_INFO_DSSS_CCK40MHZ) &&
674 !(hw & HT_CAP_INFO_DSSS_CCK40MHZ)) {
675 wpa_printf(MSG_ERROR, "Driver does not support configured "
676 "HT capability [DSSS_CCK-40]");
677 return 0;
678 }
679
680 if ((conf & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT) &&
681 !(hw & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT)) {
682 wpa_printf(MSG_ERROR, "Driver does not support configured "
683 "HT capability [LSIG-TXOP-PROT]");
684 return 0;
685 }
686
687 return 1;
688 }
689
690
691 #ifdef CONFIG_IEEE80211AC
ieee80211ac_supported_vht_capab(struct hostapd_iface * iface)692 static int ieee80211ac_supported_vht_capab(struct hostapd_iface *iface)
693 {
694 struct hostapd_hw_modes *mode = iface->current_mode;
695 u32 hw = mode->vht_capab;
696 u32 conf = iface->conf->vht_capab;
697
698 wpa_printf(MSG_DEBUG, "hw vht capab: 0x%x, conf vht capab: 0x%x",
699 hw, conf);
700
701 if (mode->mode == HOSTAPD_MODE_IEEE80211G &&
702 iface->conf->bss[0]->vendor_vht &&
703 mode->vht_capab == 0 && iface->hw_features) {
704 int i;
705
706 for (i = 0; i < iface->num_hw_features; i++) {
707 if (iface->hw_features[i].mode ==
708 HOSTAPD_MODE_IEEE80211A) {
709 mode = &iface->hw_features[i];
710 hw = mode->vht_capab;
711 wpa_printf(MSG_DEBUG,
712 "update hw vht capab based on 5 GHz band: 0x%x",
713 hw);
714 break;
715 }
716 }
717 }
718
719 return ieee80211ac_cap_check(hw, conf);
720 }
721 #endif /* CONFIG_IEEE80211AC */
722
723
724 #ifdef CONFIG_IEEE80211AX
ieee80211ax_supported_he_capab(struct hostapd_iface * iface)725 static int ieee80211ax_supported_he_capab(struct hostapd_iface *iface)
726 {
727 return 1;
728 }
729 #endif /* CONFIG_IEEE80211AX */
730
731
hostapd_check_ht_capab(struct hostapd_iface * iface)732 int hostapd_check_ht_capab(struct hostapd_iface *iface)
733 {
734 int ret;
735
736 if (is_6ghz_freq(iface->freq))
737 return 0;
738 if (!iface->conf->ieee80211n)
739 return 0;
740
741 if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211B &&
742 iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G &&
743 (iface->conf->ht_capab & HT_CAP_INFO_DSSS_CCK40MHZ)) {
744 wpa_printf(MSG_DEBUG,
745 "Disable HT capability [DSSS_CCK-40] on 5 GHz band");
746 iface->conf->ht_capab &= ~HT_CAP_INFO_DSSS_CCK40MHZ;
747 }
748
749 if (!ieee80211n_supported_ht_capab(iface))
750 return -1;
751 #ifdef CONFIG_IEEE80211AX
752 if (iface->conf->ieee80211ax &&
753 !ieee80211ax_supported_he_capab(iface))
754 return -1;
755 #endif /* CONFIG_IEEE80211AX */
756 #ifdef CONFIG_IEEE80211AC
757 if (iface->conf->ieee80211ac &&
758 !ieee80211ac_supported_vht_capab(iface))
759 return -1;
760 #endif /* CONFIG_IEEE80211AC */
761 ret = ieee80211n_check_40mhz(iface);
762 if (ret)
763 return ret;
764 if (!ieee80211n_allowed_ht40_channel_pair(iface))
765 return -1;
766
767 return 0;
768 }
769
770
hostapd_check_edmg_capab(struct hostapd_iface * iface)771 int hostapd_check_edmg_capab(struct hostapd_iface *iface)
772 {
773 struct hostapd_hw_modes *mode = iface->hw_features;
774 struct ieee80211_edmg_config edmg;
775
776 if (!iface->conf->enable_edmg)
777 return 0;
778
779 hostapd_encode_edmg_chan(iface->conf->enable_edmg,
780 iface->conf->edmg_channel,
781 iface->conf->channel,
782 &edmg);
783
784 if (mode->edmg.channels && ieee802_edmg_is_allowed(mode->edmg, edmg))
785 return 0;
786
787 wpa_printf(MSG_WARNING, "Requested EDMG configuration is not valid");
788 wpa_printf(MSG_INFO, "EDMG capab: channels 0x%x, bw_config %d",
789 mode->edmg.channels, mode->edmg.bw_config);
790 wpa_printf(MSG_INFO,
791 "Requested EDMG configuration: channels 0x%x, bw_config %d",
792 edmg.channels, edmg.bw_config);
793 return -1;
794 }
795
796
hostapd_check_he_6ghz_capab(struct hostapd_iface * iface)797 int hostapd_check_he_6ghz_capab(struct hostapd_iface *iface)
798 {
799 #ifdef CONFIG_IEEE80211AX
800 struct he_capabilities *he_cap;
801 u16 hw;
802
803 if (!iface->current_mode || !is_6ghz_freq(iface->freq))
804 return 0;
805
806 he_cap = &iface->current_mode->he_capab[IEEE80211_MODE_AP];
807 hw = he_cap->he_6ghz_capa;
808 if (iface->conf->he_6ghz_max_mpdu >
809 ((hw & HE_6GHZ_BAND_CAP_MAX_MPDU_LEN_MASK) >>
810 HE_6GHZ_BAND_CAP_MAX_MPDU_LEN_SHIFT)) {
811 wpa_printf(MSG_ERROR,
812 "The driver does not support the configured HE 6 GHz Max MPDU length");
813 return -1;
814 }
815
816 if (iface->conf->he_6ghz_max_ampdu_len_exp >
817 ((hw & HE_6GHZ_BAND_CAP_MAX_AMPDU_LEN_EXP_MASK) >>
818 HE_6GHZ_BAND_CAP_MAX_AMPDU_LEN_EXP_SHIFT)) {
819 wpa_printf(MSG_ERROR,
820 "The driver does not support the configured HE 6 GHz Max AMPDU Length Exponent");
821 return -1;
822 }
823
824 if (iface->conf->he_6ghz_rx_ant_pat &&
825 !(hw & HE_6GHZ_BAND_CAP_RX_ANTPAT_CONS)) {
826 wpa_printf(MSG_ERROR,
827 "The driver does not support the configured HE 6 GHz Rx Antenna Pattern");
828 return -1;
829 }
830
831 if (iface->conf->he_6ghz_tx_ant_pat &&
832 !(hw & HE_6GHZ_BAND_CAP_TX_ANTPAT_CONS)) {
833 wpa_printf(MSG_ERROR,
834 "The driver does not support the configured HE 6 GHz Tx Antenna Pattern");
835 return -1;
836 }
837 #endif /* CONFIG_IEEE80211AX */
838 return 0;
839 }
840
841
842 /* Returns:
843 * 1 = usable
844 * 0 = not usable
845 * -1 = not currently usable due to 6 GHz NO-IR
846 */
hostapd_is_usable_chan(struct hostapd_iface * iface,int frequency,int primary)847 static int hostapd_is_usable_chan(struct hostapd_iface *iface,
848 int frequency, int primary)
849 {
850 struct hostapd_channel_data *chan;
851
852 if (!iface->current_mode)
853 return 0;
854
855 chan = hw_get_channel_freq(iface->current_mode->mode, frequency, NULL,
856 iface->hw_features, iface->num_hw_features);
857 if (!chan)
858 return 0;
859
860 if (!(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 if (!err)
1144 return HOSTAPD_CHAN_INVALID;
1145 return HOSTAPD_CHAN_INVALID_NO_IR;
1146 }
1147 return HOSTAPD_CHAN_VALID;
1148 }
1149
1150 /*
1151 * The user set channel=0 or channel=acs_survey
1152 * which is used to trigger ACS.
1153 */
1154
1155 switch (acs_init(iface)) {
1156 case HOSTAPD_CHAN_ACS:
1157 return HOSTAPD_CHAN_ACS;
1158 case HOSTAPD_CHAN_INVALID_NO_IR:
1159 return HOSTAPD_CHAN_INVALID_NO_IR;
1160 case HOSTAPD_CHAN_VALID:
1161 case HOSTAPD_CHAN_INVALID:
1162 default:
1163 return HOSTAPD_CHAN_INVALID;
1164 }
1165 }
1166
1167
hostapd_notify_bad_chans(struct hostapd_iface * iface)1168 static void hostapd_notify_bad_chans(struct hostapd_iface *iface)
1169 {
1170 if (!iface->current_mode) {
1171 hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
1172 HOSTAPD_LEVEL_WARNING,
1173 "Hardware does not support configured mode");
1174 return;
1175 }
1176 hostapd_logger(iface->bss[0], NULL,
1177 HOSTAPD_MODULE_IEEE80211,
1178 HOSTAPD_LEVEL_WARNING,
1179 "Configured channel (%d) or frequency (%d) (secondary_channel=%d) not found from the channel list of the current mode (%d) %s",
1180 iface->conf->channel,
1181 iface->freq, iface->conf->secondary_channel,
1182 iface->current_mode->mode,
1183 hostapd_hw_mode_txt(iface->current_mode->mode));
1184 hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
1185 HOSTAPD_LEVEL_WARNING,
1186 "Hardware does not support configured channel");
1187 }
1188
1189
hostapd_acs_completed(struct hostapd_iface * iface,int err)1190 int hostapd_acs_completed(struct hostapd_iface *iface, int err)
1191 {
1192 int ret = -1;
1193
1194 if (err)
1195 goto out;
1196
1197 switch (hostapd_check_chans(iface)) {
1198 case HOSTAPD_CHAN_VALID:
1199 iface->is_no_ir = false;
1200 wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO,
1201 ACS_EVENT_COMPLETED "freq=%d channel=%d",
1202 iface->freq, iface->conf->channel);
1203 break;
1204 case HOSTAPD_CHAN_ACS:
1205 wpa_printf(MSG_ERROR, "ACS error - reported complete, but no result available");
1206 wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED);
1207 hostapd_notify_bad_chans(iface);
1208 goto out;
1209 case HOSTAPD_CHAN_INVALID_NO_IR:
1210 iface->is_no_ir = true;
1211 __attribute__((fallthrough));
1212 case HOSTAPD_CHAN_INVALID:
1213 default:
1214 wpa_printf(MSG_ERROR, "ACS picked unusable channels");
1215 wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED);
1216 hostapd_notify_bad_chans(iface);
1217 goto out;
1218 }
1219
1220 ret = hostapd_check_ht_capab(iface);
1221 if (ret < 0)
1222 goto out;
1223 if (ret == 1) {
1224 wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback");
1225 return 0;
1226 }
1227
1228 ret = 0;
1229 out:
1230 return hostapd_setup_interface_complete(iface, ret);
1231 }
1232
1233
1234 /**
1235 * hostapd_csa_update_hwmode - Update hardware mode
1236 * @iface: Pointer to interface data.
1237 * Returns: 0 on success, < 0 on failure
1238 *
1239 * Update hardware mode when the operating channel changed because of CSA.
1240 */
hostapd_csa_update_hwmode(struct hostapd_iface * iface)1241 int hostapd_csa_update_hwmode(struct hostapd_iface *iface)
1242 {
1243 if (!iface || !iface->conf)
1244 return -1;
1245
1246 iface->current_mode = NULL;
1247 iface->conf->hw_mode = HOSTAPD_MODE_IEEE80211ANY;
1248
1249 return hostapd_determine_mode(iface);
1250 }
1251
1252
1253 /**
1254 * hostapd_select_hw_mode - Select the hardware mode
1255 * @iface: Pointer to interface data.
1256 * Returns: 0 on success, < 0 on failure
1257 *
1258 * Sets up the hardware mode, channel, rates, and passive scanning
1259 * based on the configuration.
1260 */
hostapd_select_hw_mode(struct hostapd_iface * iface)1261 int hostapd_select_hw_mode(struct hostapd_iface *iface)
1262 {
1263 int i;
1264
1265 if (iface->num_hw_features < 1)
1266 return -1;
1267
1268 if ((iface->conf->hw_mode == HOSTAPD_MODE_IEEE80211G ||
1269 iface->conf->ieee80211n || iface->conf->ieee80211ac ||
1270 iface->conf->ieee80211ax || iface->conf->ieee80211be) &&
1271 iface->conf->channel == 14) {
1272 wpa_printf(MSG_INFO, "Disable OFDM/HT/VHT/HE/EHT on channel 14");
1273 iface->conf->hw_mode = HOSTAPD_MODE_IEEE80211B;
1274 iface->conf->ieee80211n = 0;
1275 iface->conf->ieee80211ac = 0;
1276 iface->conf->ieee80211ax = 0;
1277 iface->conf->ieee80211be = 0;
1278 }
1279
1280 iface->current_mode = NULL;
1281 for (i = 0; i < iface->num_hw_features; i++) {
1282 struct hostapd_hw_modes *mode = &iface->hw_features[i];
1283
1284 if (mode->mode == iface->conf->hw_mode) {
1285 if (skip_mode(iface, mode))
1286 continue;
1287
1288 iface->current_mode = mode;
1289 break;
1290 }
1291 }
1292
1293 if (iface->current_mode == NULL) {
1294 if ((iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) &&
1295 (iface->drv_flags & WPA_DRIVER_FLAGS_SUPPORT_HW_MODE_ANY)) {
1296 wpa_printf(MSG_DEBUG,
1297 "Using offloaded hw_mode=any ACS");
1298 } else if (!(iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) &&
1299 iface->conf->hw_mode == HOSTAPD_MODE_IEEE80211ANY) {
1300 wpa_printf(MSG_DEBUG,
1301 "Using internal ACS for hw_mode=any");
1302 } else {
1303 wpa_printf(MSG_ERROR,
1304 "Hardware does not support configured mode");
1305 hostapd_logger(iface->bss[0], NULL,
1306 HOSTAPD_MODULE_IEEE80211,
1307 HOSTAPD_LEVEL_WARNING,
1308 "Hardware does not support configured mode (%d) (hw_mode in hostapd.conf)",
1309 (int) iface->conf->hw_mode);
1310 return -2;
1311 }
1312 }
1313
1314 switch (hostapd_check_chans(iface)) {
1315 case HOSTAPD_CHAN_VALID:
1316 iface->is_no_ir = false;
1317 return 0;
1318 case HOSTAPD_CHAN_ACS: /* ACS will run and later complete */
1319 return 1;
1320 case HOSTAPD_CHAN_INVALID_NO_IR:
1321 iface->is_no_ir = true;
1322 __attribute__((fallthrough));
1323 case HOSTAPD_CHAN_INVALID:
1324 default:
1325 hostapd_notify_bad_chans(iface);
1326 return -3;
1327 }
1328 }
1329
1330
hostapd_hw_mode_txt(int mode)1331 const char * hostapd_hw_mode_txt(int mode)
1332 {
1333 switch (mode) {
1334 case HOSTAPD_MODE_IEEE80211A:
1335 return "IEEE 802.11a";
1336 case HOSTAPD_MODE_IEEE80211B:
1337 return "IEEE 802.11b";
1338 case HOSTAPD_MODE_IEEE80211G:
1339 return "IEEE 802.11g";
1340 case HOSTAPD_MODE_IEEE80211AD:
1341 return "IEEE 802.11ad";
1342 default:
1343 return "UNKNOWN";
1344 }
1345 }
1346
1347
hostapd_hw_get_freq(struct hostapd_data * hapd,int chan)1348 int hostapd_hw_get_freq(struct hostapd_data *hapd, int chan)
1349 {
1350 return hw_get_freq(hapd->iface->current_mode, chan);
1351 }
1352
1353
hostapd_hw_get_channel(struct hostapd_data * hapd,int freq)1354 int hostapd_hw_get_channel(struct hostapd_data *hapd, int freq)
1355 {
1356 int i, channel;
1357 struct hostapd_hw_modes *mode;
1358
1359 if (hapd->iface->current_mode) {
1360 channel = hw_get_chan(hapd->iface->current_mode->mode, freq,
1361 hapd->iface->hw_features,
1362 hapd->iface->num_hw_features);
1363 if (channel)
1364 return channel;
1365 }
1366
1367 /* Check other available modes since the channel list for the current
1368 * mode did not include the specified frequency. */
1369 if (!hapd->iface->hw_features)
1370 return 0;
1371 for (i = 0; i < hapd->iface->num_hw_features; i++) {
1372 mode = &hapd->iface->hw_features[i];
1373 channel = hw_get_chan(mode->mode, freq,
1374 hapd->iface->hw_features,
1375 hapd->iface->num_hw_features);
1376 if (channel)
1377 return channel;
1378 }
1379 return 0;
1380 }
1381
1382
hostapd_hw_skip_mode(struct hostapd_iface * iface,struct hostapd_hw_modes * mode)1383 int hostapd_hw_skip_mode(struct hostapd_iface *iface,
1384 struct hostapd_hw_modes *mode)
1385 {
1386 int i;
1387
1388 if (iface->current_mode)
1389 return mode != iface->current_mode;
1390 if (mode->mode != HOSTAPD_MODE_IEEE80211B)
1391 return 0;
1392 for (i = 0; i < iface->num_hw_features; i++) {
1393 if (iface->hw_features[i].mode == HOSTAPD_MODE_IEEE80211G)
1394 return 1;
1395 }
1396 return 0;
1397 }
1398