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6fc6879b JM |
1 | /* |
2 | * hostapd / Hardware feature query and different modes | |
3 | * Copyright 2002-2003, Instant802 Networks, Inc. | |
4 | * Copyright 2005-2006, Devicescape Software, Inc. | |
1057d78e | 5 | * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi> |
6fc6879b JM |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * Alternatively, this software may be distributed under the terms of BSD | |
12 | * license. | |
13 | * | |
14 | * See README and COPYING for more details. | |
15 | */ | |
16 | ||
1057d78e | 17 | #include "utils/includes.h" |
6fc6879b | 18 | |
1057d78e JM |
19 | #include "utils/common.h" |
20 | #include "utils/eloop.h" | |
90973fb2 JM |
21 | #include "common/ieee802_11_defs.h" |
22 | #include "common/ieee802_11_common.h" | |
6226e38d JM |
23 | #include "hostapd.h" |
24 | #include "ap_config.h" | |
bfddd95c | 25 | #include "driver_i.h" |
6226e38d | 26 | #include "hw_features.h" |
6fc6879b JM |
27 | |
28 | ||
29 | void hostapd_free_hw_features(struct hostapd_hw_modes *hw_features, | |
30 | size_t num_hw_features) | |
31 | { | |
32 | size_t i; | |
33 | ||
34 | if (hw_features == NULL) | |
35 | return; | |
36 | ||
37 | for (i = 0; i < num_hw_features; i++) { | |
38 | os_free(hw_features[i].channels); | |
39 | os_free(hw_features[i].rates); | |
40 | } | |
41 | ||
42 | os_free(hw_features); | |
43 | } | |
44 | ||
45 | ||
46 | int hostapd_get_hw_features(struct hostapd_iface *iface) | |
47 | { | |
48 | struct hostapd_data *hapd = iface->bss[0]; | |
49 | int ret = 0, i, j; | |
50 | u16 num_modes, flags; | |
51 | struct hostapd_hw_modes *modes; | |
52 | ||
85141289 JM |
53 | if (hostapd_drv_none(hapd)) |
54 | return -1; | |
6fc6879b JM |
55 | modes = hostapd_get_hw_feature_data(hapd, &num_modes, &flags); |
56 | if (modes == NULL) { | |
57 | hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211, | |
58 | HOSTAPD_LEVEL_DEBUG, | |
59 | "Fetching hardware channel/rate support not " | |
60 | "supported."); | |
61 | return -1; | |
62 | } | |
63 | ||
64 | iface->hw_flags = flags; | |
65 | ||
66 | hostapd_free_hw_features(iface->hw_features, iface->num_hw_features); | |
67 | iface->hw_features = modes; | |
68 | iface->num_hw_features = num_modes; | |
69 | ||
70 | for (i = 0; i < num_modes; i++) { | |
71 | struct hostapd_hw_modes *feature = &modes[i]; | |
72 | /* set flag for channels we can use in current regulatory | |
73 | * domain */ | |
74 | for (j = 0; j < feature->num_channels; j++) { | |
10b83bd7 JM |
75 | /* |
76 | * Disable all channels that are marked not to allow | |
77 | * IBSS operation or active scanning. In addition, | |
78 | * disable all channels that require radar detection, | |
79 | * since that (in addition to full DFS) is not yet | |
80 | * supported. | |
81 | */ | |
82 | if (feature->channels[j].flag & | |
83 | (HOSTAPD_CHAN_NO_IBSS | | |
84 | HOSTAPD_CHAN_PASSIVE_SCAN | | |
85 | HOSTAPD_CHAN_RADAR)) | |
6fc6879b | 86 | feature->channels[j].flag |= |
10b83bd7 JM |
87 | HOSTAPD_CHAN_DISABLED; |
88 | if (feature->channels[j].flag & HOSTAPD_CHAN_DISABLED) | |
89 | continue; | |
90 | wpa_printf(MSG_MSGDUMP, "Allowed channel: mode=%d " | |
bf01d8bc | 91 | "chan=%d freq=%d MHz max_tx_power=%d dBm", |
10b83bd7 JM |
92 | feature->mode, |
93 | feature->channels[j].chan, | |
bf01d8bc JM |
94 | feature->channels[j].freq, |
95 | feature->channels[j].max_tx_power); | |
6fc6879b JM |
96 | } |
97 | } | |
98 | ||
99 | return ret; | |
100 | } | |
101 | ||
102 | ||
103 | static int hostapd_prepare_rates(struct hostapd_data *hapd, | |
104 | struct hostapd_hw_modes *mode) | |
105 | { | |
106 | int i, num_basic_rates = 0; | |
107 | int basic_rates_a[] = { 60, 120, 240, -1 }; | |
108 | int basic_rates_b[] = { 10, 20, -1 }; | |
109 | int basic_rates_g[] = { 10, 20, 55, 110, -1 }; | |
110 | int *basic_rates; | |
111 | ||
112 | if (hapd->iconf->basic_rates) | |
113 | basic_rates = hapd->iconf->basic_rates; | |
114 | else switch (mode->mode) { | |
115 | case HOSTAPD_MODE_IEEE80211A: | |
116 | basic_rates = basic_rates_a; | |
117 | break; | |
118 | case HOSTAPD_MODE_IEEE80211B: | |
119 | basic_rates = basic_rates_b; | |
120 | break; | |
121 | case HOSTAPD_MODE_IEEE80211G: | |
122 | basic_rates = basic_rates_g; | |
123 | break; | |
124 | default: | |
125 | return -1; | |
126 | } | |
127 | ||
128 | if (hostapd_set_rate_sets(hapd, hapd->iconf->supported_rates, | |
129 | basic_rates, mode->mode)) { | |
130 | wpa_printf(MSG_ERROR, "Failed to update rate sets in kernel " | |
131 | "module"); | |
132 | } | |
133 | ||
134 | os_free(hapd->iface->current_rates); | |
135 | hapd->iface->num_rates = 0; | |
136 | ||
137 | hapd->iface->current_rates = | |
fb7842aa | 138 | os_zalloc(mode->num_rates * sizeof(struct hostapd_rate_data)); |
6fc6879b JM |
139 | if (!hapd->iface->current_rates) { |
140 | wpa_printf(MSG_ERROR, "Failed to allocate memory for rate " | |
141 | "table."); | |
142 | return -1; | |
143 | } | |
144 | ||
145 | for (i = 0; i < mode->num_rates; i++) { | |
146 | struct hostapd_rate_data *rate; | |
147 | ||
148 | if (hapd->iconf->supported_rates && | |
149 | !hostapd_rate_found(hapd->iconf->supported_rates, | |
fb7842aa | 150 | mode->rates[i])) |
6fc6879b JM |
151 | continue; |
152 | ||
153 | rate = &hapd->iface->current_rates[hapd->iface->num_rates]; | |
fb7842aa | 154 | rate->rate = mode->rates[i]; |
6fc6879b JM |
155 | if (hostapd_rate_found(basic_rates, rate->rate)) { |
156 | rate->flags |= HOSTAPD_RATE_BASIC; | |
157 | num_basic_rates++; | |
fb7842aa | 158 | } |
6fc6879b JM |
159 | wpa_printf(MSG_DEBUG, "RATE[%d] rate=%d flags=0x%x", |
160 | hapd->iface->num_rates, rate->rate, rate->flags); | |
161 | hapd->iface->num_rates++; | |
162 | } | |
163 | ||
164 | if (hapd->iface->num_rates == 0 || num_basic_rates == 0) { | |
165 | wpa_printf(MSG_ERROR, "No rates remaining in supported/basic " | |
166 | "rate sets (%d,%d).", | |
167 | hapd->iface->num_rates, num_basic_rates); | |
168 | return -1; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | ||
3e0cb2c5 JM |
175 | #ifdef CONFIG_IEEE80211N |
176 | static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface) | |
177 | { | |
178 | int sec_chan, ok, j, first; | |
179 | int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157, | |
180 | 184, 192 }; | |
181 | size_t k; | |
182 | ||
183 | if (!iface->conf->secondary_channel) | |
184 | return 1; /* HT40 not used */ | |
185 | ||
186 | sec_chan = iface->conf->channel + iface->conf->secondary_channel * 4; | |
187 | wpa_printf(MSG_DEBUG, "HT40: control channel: %d " | |
188 | "secondary channel: %d", | |
189 | iface->conf->channel, sec_chan); | |
190 | ||
191 | /* Verify that HT40 secondary channel is an allowed 20 MHz | |
192 | * channel */ | |
193 | ok = 0; | |
194 | for (j = 0; j < iface->current_mode->num_channels; j++) { | |
195 | struct hostapd_channel_data *chan = | |
196 | &iface->current_mode->channels[j]; | |
197 | if (!(chan->flag & HOSTAPD_CHAN_DISABLED) && | |
198 | chan->chan == sec_chan) { | |
199 | ok = 1; | |
200 | break; | |
201 | } | |
202 | } | |
203 | if (!ok) { | |
204 | wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed", | |
205 | sec_chan); | |
206 | return 0; | |
207 | } | |
208 | ||
209 | /* | |
210 | * Verify that HT40 primary,secondary channel pair is allowed per | |
211 | * IEEE 802.11n Annex J. This is only needed for 5 GHz band since | |
212 | * 2.4 GHz rules allow all cases where the secondary channel fits into | |
213 | * the list of allowed channels (already checked above). | |
214 | */ | |
215 | if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A) | |
216 | return 1; | |
217 | ||
218 | if (iface->conf->secondary_channel > 0) | |
219 | first = iface->conf->channel; | |
220 | else | |
221 | first = sec_chan; | |
222 | ||
223 | ok = 0; | |
224 | for (k = 0; k < sizeof(allowed) / sizeof(allowed[0]); k++) { | |
225 | if (first == allowed[k]) { | |
226 | ok = 1; | |
227 | break; | |
228 | } | |
229 | } | |
230 | if (!ok) { | |
231 | wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed", | |
232 | iface->conf->channel, | |
233 | iface->conf->secondary_channel); | |
234 | return 0; | |
235 | } | |
236 | ||
237 | return 1; | |
238 | } | |
30fd5f14 JM |
239 | |
240 | ||
5eb4e3d0 JM |
241 | static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface) |
242 | { | |
243 | if (iface->conf->secondary_channel > 0) { | |
244 | iface->conf->channel += 4; | |
245 | iface->conf->secondary_channel = -1; | |
246 | } else { | |
247 | iface->conf->channel -= 4; | |
248 | iface->conf->secondary_channel = 1; | |
249 | } | |
250 | } | |
251 | ||
252 | ||
ad1e68e6 JM |
253 | static void ieee80211n_get_pri_sec_chan(struct wpa_scan_res *bss, |
254 | int *pri_chan, int *sec_chan) | |
255 | { | |
256 | struct ieee80211_ht_operation *oper; | |
257 | struct ieee802_11_elems elems; | |
258 | ||
259 | *pri_chan = *sec_chan = 0; | |
260 | ||
261 | ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0); | |
262 | if (elems.ht_operation && | |
263 | elems.ht_operation_len >= sizeof(*oper)) { | |
264 | oper = (struct ieee80211_ht_operation *) elems.ht_operation; | |
265 | *pri_chan = oper->control_chan; | |
266 | if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) { | |
267 | if (oper->ht_param & | |
268 | HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) | |
269 | *sec_chan = *pri_chan + 4; | |
270 | else if (oper->ht_param & | |
271 | HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) | |
272 | *sec_chan = *pri_chan - 4; | |
273 | } | |
274 | } | |
275 | } | |
276 | ||
277 | ||
278 | static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface, | |
279 | struct wpa_scan_results *scan_res) | |
5eb4e3d0 JM |
280 | { |
281 | int pri_chan, sec_chan, pri_freq, sec_freq, pri_bss, sec_bss; | |
ad1e68e6 JM |
282 | int bss_pri_chan, bss_sec_chan; |
283 | size_t i; | |
5eb4e3d0 JM |
284 | int match; |
285 | ||
286 | pri_chan = iface->conf->channel; | |
287 | sec_chan = iface->conf->secondary_channel * 4; | |
288 | pri_freq = hostapd_hw_get_freq(iface->bss[0], pri_chan); | |
289 | if (iface->conf->secondary_channel > 0) | |
290 | sec_freq = pri_freq + 20; | |
291 | else | |
292 | sec_freq = pri_freq - 20; | |
293 | ||
5eb4e3d0 JM |
294 | /* |
295 | * Switch PRI/SEC channels if Beacons were detected on selected SEC | |
296 | * channel, but not on selected PRI channel. | |
297 | */ | |
298 | pri_bss = sec_bss = 0; | |
ad1e68e6 JM |
299 | for (i = 0; i < scan_res->num; i++) { |
300 | struct wpa_scan_res *bss = scan_res->res[i]; | |
301 | if (bss->freq == pri_freq) | |
5eb4e3d0 | 302 | pri_bss++; |
ad1e68e6 | 303 | else if (bss->freq == sec_freq) |
5eb4e3d0 JM |
304 | sec_bss++; |
305 | } | |
306 | if (sec_bss && !pri_bss) { | |
307 | wpa_printf(MSG_INFO, "Switch own primary and secondary " | |
308 | "channel to get secondary channel with no Beacons " | |
309 | "from other BSSes"); | |
310 | ieee80211n_switch_pri_sec(iface); | |
311 | } | |
312 | ||
313 | /* | |
314 | * Match PRI/SEC channel with any existing HT40 BSS on the same | |
315 | * channels that we are about to use (if already mixed order in | |
316 | * existing BSSes, use own preference). | |
317 | */ | |
318 | match = 0; | |
ad1e68e6 JM |
319 | for (i = 0; i < scan_res->num; i++) { |
320 | struct wpa_scan_res *bss = scan_res->res[i]; | |
321 | ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan); | |
322 | if (pri_chan == bss_pri_chan && | |
323 | sec_chan == bss_sec_chan) { | |
5eb4e3d0 JM |
324 | match = 1; |
325 | break; | |
326 | } | |
327 | } | |
328 | if (!match) { | |
ad1e68e6 JM |
329 | for (i = 0; i < scan_res->num; i++) { |
330 | struct wpa_scan_res *bss = scan_res->res[i]; | |
c6313c75 FF |
331 | ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, |
332 | &bss_sec_chan); | |
ad1e68e6 JM |
333 | if (pri_chan == bss_sec_chan && |
334 | sec_chan == bss_pri_chan) { | |
5eb4e3d0 JM |
335 | wpa_printf(MSG_INFO, "Switch own primary and " |
336 | "secondary channel due to BSS " | |
337 | "overlap with " MACSTR, | |
ad1e68e6 | 338 | MAC2STR(bss->bssid)); |
5eb4e3d0 JM |
339 | ieee80211n_switch_pri_sec(iface); |
340 | break; | |
341 | } | |
342 | } | |
343 | } | |
344 | ||
345 | return 1; | |
346 | } | |
347 | ||
348 | ||
ad1e68e6 JM |
349 | static int ieee80211n_check_40mhz_2g4(struct hostapd_iface *iface, |
350 | struct wpa_scan_results *scan_res) | |
5eb4e3d0 JM |
351 | { |
352 | int pri_freq, sec_freq; | |
353 | int affected_start, affected_end; | |
ad1e68e6 | 354 | size_t i; |
5eb4e3d0 JM |
355 | |
356 | pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel); | |
357 | if (iface->conf->secondary_channel > 0) | |
358 | sec_freq = pri_freq + 20; | |
359 | else | |
360 | sec_freq = pri_freq - 20; | |
361 | affected_start = (pri_freq + sec_freq) / 2 - 25; | |
362 | affected_end = (pri_freq + sec_freq) / 2 + 25; | |
363 | wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", | |
364 | affected_start, affected_end); | |
ad1e68e6 JM |
365 | for (i = 0; i < scan_res->num; i++) { |
366 | struct wpa_scan_res *bss = scan_res->res[i]; | |
367 | int pri = bss->freq; | |
5eb4e3d0 | 368 | int sec = pri; |
ad1e68e6 JM |
369 | int sec_chan, pri_chan; |
370 | ||
371 | ieee80211n_get_pri_sec_chan(bss, &pri_chan, &sec_chan); | |
372 | ||
373 | if (sec_chan) { | |
374 | if (sec_chan < pri_chan) | |
5eb4e3d0 JM |
375 | sec = pri - 20; |
376 | else | |
377 | sec = pri + 20; | |
378 | } | |
379 | ||
380 | if ((pri < affected_start || pri > affected_end) && | |
381 | (sec < affected_start || sec > affected_end)) | |
382 | continue; /* not within affected channel range */ | |
383 | ||
ad1e68e6 JM |
384 | wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR |
385 | " freq=%d pri=%d sec=%d", | |
386 | MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan); | |
387 | ||
388 | if (sec_chan) { | |
5eb4e3d0 JM |
389 | if (pri_freq != pri || sec_freq != sec) { |
390 | wpa_printf(MSG_DEBUG, "40 MHz pri/sec " | |
391 | "mismatch with BSS " MACSTR | |
392 | " <%d,%d> (chan=%d%c) vs. <%d,%d>", | |
ad1e68e6 JM |
393 | MAC2STR(bss->bssid), |
394 | pri, sec, pri_chan, | |
5eb4e3d0 JM |
395 | sec > pri ? '+' : '-', |
396 | pri_freq, sec_freq); | |
397 | return 0; | |
398 | } | |
399 | } | |
400 | ||
401 | /* TODO: 40 MHz intolerant */ | |
402 | } | |
403 | ||
404 | return 1; | |
405 | } | |
406 | ||
407 | ||
ad1e68e6 | 408 | static void ieee80211n_check_scan(struct hostapd_iface *iface) |
5eb4e3d0 | 409 | { |
ad1e68e6 | 410 | struct wpa_scan_results *scan_res; |
5eb4e3d0 JM |
411 | int oper40; |
412 | ||
5eb4e3d0 JM |
413 | /* Check list of neighboring BSSes (from scan) to see whether 40 MHz is |
414 | * allowed per IEEE 802.11n/D7.0, 11.14.3.2 */ | |
415 | ||
ad1e68e6 JM |
416 | iface->scan_cb = NULL; |
417 | ||
418 | scan_res = hostapd_driver_get_scan_results(iface->bss[0]); | |
419 | if (scan_res == NULL) { | |
420 | hostapd_setup_interface_complete(iface, 1); | |
421 | return; | |
422 | } | |
423 | ||
5eb4e3d0 | 424 | if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A) |
ad1e68e6 | 425 | oper40 = ieee80211n_check_40mhz_5g(iface, scan_res); |
5eb4e3d0 | 426 | else |
ad1e68e6 JM |
427 | oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res); |
428 | wpa_scan_results_free(scan_res); | |
5eb4e3d0 JM |
429 | |
430 | if (!oper40) { | |
431 | wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on " | |
432 | "channel pri=%d sec=%d based on overlapping BSSes", | |
433 | iface->conf->channel, | |
434 | iface->conf->channel + | |
435 | iface->conf->secondary_channel * 4); | |
436 | iface->conf->secondary_channel = 0; | |
437 | iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET; | |
438 | } | |
ad1e68e6 JM |
439 | |
440 | hostapd_setup_interface_complete(iface, 0); | |
441 | } | |
442 | ||
443 | ||
444 | static int ieee80211n_check_40mhz(struct hostapd_iface *iface) | |
445 | { | |
446 | struct wpa_driver_scan_params params; | |
447 | ||
448 | if (!iface->conf->secondary_channel) | |
449 | return 0; /* HT40 not used */ | |
450 | ||
451 | wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling " | |
452 | "40 MHz channel"); | |
453 | os_memset(¶ms, 0, sizeof(params)); | |
454 | /* TODO: scan only the needed frequency */ | |
455 | if (hostapd_driver_scan(iface->bss[0], ¶ms) < 0) { | |
456 | wpa_printf(MSG_ERROR, "Failed to request a scan of " | |
457 | "neighboring BSSes"); | |
458 | return -1; | |
459 | } | |
460 | ||
461 | iface->scan_cb = ieee80211n_check_scan; | |
462 | return 1; | |
5eb4e3d0 JM |
463 | } |
464 | ||
465 | ||
30fd5f14 JM |
466 | static int ieee80211n_supported_ht_capab(struct hostapd_iface *iface) |
467 | { | |
468 | u16 hw = iface->current_mode->ht_capab; | |
469 | u16 conf = iface->conf->ht_capab; | |
470 | ||
471 | if (!iface->conf->ieee80211n) | |
472 | return 1; | |
473 | ||
474 | if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) && | |
475 | !(hw & HT_CAP_INFO_LDPC_CODING_CAP)) { | |
476 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
477 | "HT capability [LDPC]"); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | if ((conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) && | |
482 | !(hw & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) { | |
483 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
484 | "HT capability [HT40*]"); | |
485 | return 0; | |
486 | } | |
487 | ||
488 | if ((conf & HT_CAP_INFO_SMPS_MASK) != (hw & HT_CAP_INFO_SMPS_MASK) && | |
489 | (conf & HT_CAP_INFO_SMPS_MASK) != HT_CAP_INFO_SMPS_DISABLED) { | |
490 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
491 | "HT capability [SMPS-*]"); | |
492 | return 0; | |
493 | } | |
494 | ||
495 | if ((conf & HT_CAP_INFO_GREEN_FIELD) && | |
496 | !(hw & HT_CAP_INFO_GREEN_FIELD)) { | |
497 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
498 | "HT capability [GF]"); | |
499 | return 0; | |
500 | } | |
501 | ||
502 | if ((conf & HT_CAP_INFO_SHORT_GI20MHZ) && | |
503 | !(hw & HT_CAP_INFO_SHORT_GI20MHZ)) { | |
504 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
505 | "HT capability [SHORT-GI-20]"); | |
506 | return 0; | |
507 | } | |
508 | ||
509 | if ((conf & HT_CAP_INFO_SHORT_GI40MHZ) && | |
510 | !(hw & HT_CAP_INFO_SHORT_GI40MHZ)) { | |
511 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
512 | "HT capability [SHORT-GI-40]"); | |
513 | return 0; | |
514 | } | |
515 | ||
516 | if ((conf & HT_CAP_INFO_TX_STBC) && !(hw & HT_CAP_INFO_TX_STBC)) { | |
517 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
518 | "HT capability [TX-STBC]"); | |
519 | return 0; | |
520 | } | |
521 | ||
522 | if ((conf & HT_CAP_INFO_RX_STBC_MASK) > | |
523 | (hw & HT_CAP_INFO_RX_STBC_MASK)) { | |
524 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
525 | "HT capability [RX-STBC*]"); | |
526 | return 0; | |
527 | } | |
528 | ||
529 | if ((conf & HT_CAP_INFO_DELAYED_BA) && | |
530 | !(hw & HT_CAP_INFO_DELAYED_BA)) { | |
531 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
532 | "HT capability [DELAYED-BA]"); | |
533 | return 0; | |
534 | } | |
535 | ||
536 | if ((conf & HT_CAP_INFO_MAX_AMSDU_SIZE) && | |
537 | !(hw & HT_CAP_INFO_MAX_AMSDU_SIZE)) { | |
538 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
539 | "HT capability [MAX-AMSDU-7935]"); | |
540 | return 0; | |
541 | } | |
542 | ||
543 | if ((conf & HT_CAP_INFO_DSSS_CCK40MHZ) && | |
544 | !(hw & HT_CAP_INFO_DSSS_CCK40MHZ)) { | |
545 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
546 | "HT capability [DSSS_CCK-40]"); | |
547 | return 0; | |
548 | } | |
549 | ||
550 | if ((conf & HT_CAP_INFO_PSMP_SUPP) && !(hw & HT_CAP_INFO_PSMP_SUPP)) { | |
551 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
552 | "HT capability [PSMP]"); | |
553 | return 0; | |
554 | } | |
555 | ||
556 | if ((conf & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT) && | |
557 | !(hw & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT)) { | |
558 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
559 | "HT capability [LSIG-TXOP-PROT]"); | |
560 | return 0; | |
561 | } | |
562 | ||
563 | return 1; | |
564 | } | |
ad1e68e6 JM |
565 | |
566 | #endif /* CONFIG_IEEE80211N */ | |
567 | ||
568 | ||
569 | int hostapd_check_ht_capab(struct hostapd_iface *iface) | |
570 | { | |
571 | #ifdef CONFIG_IEEE80211N | |
572 | int ret; | |
573 | ret = ieee80211n_check_40mhz(iface); | |
574 | if (ret) | |
575 | return ret; | |
576 | if (!ieee80211n_allowed_ht40_channel_pair(iface)) | |
577 | return -1; | |
578 | if (!ieee80211n_supported_ht_capab(iface)) | |
579 | return -1; | |
3e0cb2c5 JM |
580 | #endif /* CONFIG_IEEE80211N */ |
581 | ||
ad1e68e6 JM |
582 | return 0; |
583 | } | |
584 | ||
3e0cb2c5 | 585 | |
6fc6879b | 586 | /** |
ddaa83eb | 587 | * hostapd_select_hw_mode - Select the hardware mode |
6fc6879b | 588 | * @iface: Pointer to interface data. |
ddaa83eb | 589 | * Returns: 0 on success, -1 on failure |
6fc6879b | 590 | * |
ddaa83eb JM |
591 | * Sets up the hardware mode, channel, rates, and passive scanning |
592 | * based on the configuration. | |
6fc6879b | 593 | */ |
ddaa83eb | 594 | int hostapd_select_hw_mode(struct hostapd_iface *iface) |
6fc6879b | 595 | { |
61693eaa | 596 | int i, j, ok; |
6fc6879b JM |
597 | |
598 | if (iface->num_hw_features < 1) | |
599 | return -1; | |
600 | ||
601 | iface->current_mode = NULL; | |
602 | for (i = 0; i < iface->num_hw_features; i++) { | |
603 | struct hostapd_hw_modes *mode = &iface->hw_features[i]; | |
6caf9ca6 | 604 | if (mode->mode == iface->conf->hw_mode) { |
6fc6879b JM |
605 | iface->current_mode = mode; |
606 | break; | |
607 | } | |
608 | } | |
609 | ||
610 | if (iface->current_mode == NULL) { | |
611 | wpa_printf(MSG_ERROR, "Hardware does not support configured " | |
612 | "mode"); | |
613 | hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211, | |
614 | HOSTAPD_LEVEL_WARNING, | |
615 | "Hardware does not support configured mode " | |
616 | "(%d)", (int) iface->conf->hw_mode); | |
617 | return -1; | |
618 | } | |
619 | ||
620 | ok = 0; | |
621 | for (j = 0; j < iface->current_mode->num_channels; j++) { | |
622 | struct hostapd_channel_data *chan = | |
623 | &iface->current_mode->channels[j]; | |
10b83bd7 | 624 | if (!(chan->flag & HOSTAPD_CHAN_DISABLED) && |
6fc6879b JM |
625 | (chan->chan == iface->conf->channel)) { |
626 | ok = 1; | |
627 | break; | |
628 | } | |
629 | } | |
24c9fceb JM |
630 | if (iface->conf->channel == 0) { |
631 | /* TODO: could request a scan of neighboring BSSes and select | |
632 | * the channel automatically */ | |
633 | wpa_printf(MSG_ERROR, "Channel not configured " | |
634 | "(hw_mode/channel in hostapd.conf)"); | |
635 | return -1; | |
636 | } | |
6fc6879b JM |
637 | if (ok == 0 && iface->conf->channel != 0) { |
638 | hostapd_logger(iface->bss[0], NULL, | |
639 | HOSTAPD_MODULE_IEEE80211, | |
640 | HOSTAPD_LEVEL_WARNING, | |
641 | "Configured channel (%d) not found from the " | |
642 | "channel list of current mode (%d) %s", | |
643 | iface->conf->channel, | |
644 | iface->current_mode->mode, | |
645 | hostapd_hw_mode_txt(iface->current_mode->mode)); | |
646 | iface->current_mode = NULL; | |
647 | } | |
648 | ||
ddaa83eb JM |
649 | if (iface->current_mode == NULL) { |
650 | hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211, | |
651 | HOSTAPD_LEVEL_WARNING, | |
652 | "Hardware does not support configured channel"); | |
6fc6879b JM |
653 | return -1; |
654 | } | |
655 | ||
ddaa83eb JM |
656 | if (hostapd_prepare_rates(iface->bss[0], iface->current_mode)) { |
657 | wpa_printf(MSG_ERROR, "Failed to prepare rates table."); | |
658 | hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211, | |
659 | HOSTAPD_LEVEL_WARNING, | |
660 | "Failed to prepare rates table."); | |
661 | return -1; | |
662 | } | |
6fc6879b | 663 | |
61693eaa | 664 | return 0; |
6fc6879b JM |
665 | } |
666 | ||
667 | ||
668 | const char * hostapd_hw_mode_txt(int mode) | |
669 | { | |
670 | switch (mode) { | |
671 | case HOSTAPD_MODE_IEEE80211A: | |
672 | return "IEEE 802.11a"; | |
673 | case HOSTAPD_MODE_IEEE80211B: | |
674 | return "IEEE 802.11b"; | |
675 | case HOSTAPD_MODE_IEEE80211G: | |
676 | return "IEEE 802.11g"; | |
677 | default: | |
678 | return "UNKNOWN"; | |
679 | } | |
680 | } | |
681 | ||
682 | ||
683 | int hostapd_hw_get_freq(struct hostapd_data *hapd, int chan) | |
684 | { | |
685 | int i; | |
686 | ||
687 | if (!hapd->iface->current_mode) | |
688 | return 0; | |
689 | ||
690 | for (i = 0; i < hapd->iface->current_mode->num_channels; i++) { | |
691 | struct hostapd_channel_data *ch = | |
692 | &hapd->iface->current_mode->channels[i]; | |
693 | if (ch->chan == chan) | |
694 | return ch->freq; | |
695 | } | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | ||
701 | int hostapd_hw_get_channel(struct hostapd_data *hapd, int freq) | |
702 | { | |
703 | int i; | |
704 | ||
705 | if (!hapd->iface->current_mode) | |
706 | return 0; | |
707 | ||
708 | for (i = 0; i < hapd->iface->current_mode->num_channels; i++) { | |
709 | struct hostapd_channel_data *ch = | |
710 | &hapd->iface->current_mode->channels[i]; | |
711 | if (ch->freq == freq) | |
712 | return ch->chan; | |
713 | } | |
714 | ||
715 | return 0; | |
716 | } |