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Commit | Line | Data |
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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. | |
7fa56233 | 5 | * Copyright (c) 2008-2012, 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" | |
6e6e8c31 | 23 | #include "drivers/driver.h" |
6226e38d JM |
24 | #include "hostapd.h" |
25 | #include "ap_config.h" | |
6e6e8c31 | 26 | #include "ap_drv_ops.h" |
6226e38d | 27 | #include "hw_features.h" |
6fc6879b JM |
28 | |
29 | ||
30 | void hostapd_free_hw_features(struct hostapd_hw_modes *hw_features, | |
31 | size_t num_hw_features) | |
32 | { | |
33 | size_t i; | |
34 | ||
35 | if (hw_features == NULL) | |
36 | return; | |
37 | ||
38 | for (i = 0; i < num_hw_features; i++) { | |
39 | os_free(hw_features[i].channels); | |
40 | os_free(hw_features[i].rates); | |
41 | } | |
42 | ||
43 | os_free(hw_features); | |
44 | } | |
45 | ||
46 | ||
47 | int hostapd_get_hw_features(struct hostapd_iface *iface) | |
48 | { | |
49 | struct hostapd_data *hapd = iface->bss[0]; | |
50 | int ret = 0, i, j; | |
51 | u16 num_modes, flags; | |
52 | struct hostapd_hw_modes *modes; | |
53 | ||
85141289 JM |
54 | if (hostapd_drv_none(hapd)) |
55 | return -1; | |
6fc6879b JM |
56 | modes = hostapd_get_hw_feature_data(hapd, &num_modes, &flags); |
57 | if (modes == NULL) { | |
58 | hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211, | |
59 | HOSTAPD_LEVEL_DEBUG, | |
60 | "Fetching hardware channel/rate support not " | |
61 | "supported."); | |
62 | return -1; | |
63 | } | |
64 | ||
65 | iface->hw_flags = flags; | |
66 | ||
67 | hostapd_free_hw_features(iface->hw_features, iface->num_hw_features); | |
68 | iface->hw_features = modes; | |
69 | iface->num_hw_features = num_modes; | |
70 | ||
71 | for (i = 0; i < num_modes; i++) { | |
72 | struct hostapd_hw_modes *feature = &modes[i]; | |
73 | /* set flag for channels we can use in current regulatory | |
74 | * domain */ | |
75 | for (j = 0; j < feature->num_channels; j++) { | |
10b83bd7 JM |
76 | /* |
77 | * Disable all channels that are marked not to allow | |
78 | * IBSS operation or active scanning. In addition, | |
79 | * disable all channels that require radar detection, | |
80 | * since that (in addition to full DFS) is not yet | |
81 | * supported. | |
82 | */ | |
83 | if (feature->channels[j].flag & | |
84 | (HOSTAPD_CHAN_NO_IBSS | | |
85 | HOSTAPD_CHAN_PASSIVE_SCAN | | |
86 | HOSTAPD_CHAN_RADAR)) | |
6fc6879b | 87 | feature->channels[j].flag |= |
10b83bd7 JM |
88 | HOSTAPD_CHAN_DISABLED; |
89 | if (feature->channels[j].flag & HOSTAPD_CHAN_DISABLED) | |
90 | continue; | |
91 | wpa_printf(MSG_MSGDUMP, "Allowed channel: mode=%d " | |
bf01d8bc | 92 | "chan=%d freq=%d MHz max_tx_power=%d dBm", |
10b83bd7 JM |
93 | feature->mode, |
94 | feature->channels[j].chan, | |
bf01d8bc JM |
95 | feature->channels[j].freq, |
96 | feature->channels[j].max_tx_power); | |
6fc6879b JM |
97 | } |
98 | } | |
99 | ||
100 | return ret; | |
101 | } | |
102 | ||
103 | ||
34445d12 | 104 | int hostapd_prepare_rates(struct hostapd_iface *iface, |
5a5009dc | 105 | struct hostapd_hw_modes *mode) |
6fc6879b JM |
106 | { |
107 | int i, num_basic_rates = 0; | |
108 | int basic_rates_a[] = { 60, 120, 240, -1 }; | |
109 | int basic_rates_b[] = { 10, 20, -1 }; | |
110 | int basic_rates_g[] = { 10, 20, 55, 110, -1 }; | |
111 | int *basic_rates; | |
112 | ||
34445d12 JM |
113 | if (iface->conf->basic_rates) |
114 | basic_rates = iface->conf->basic_rates; | |
6fc6879b JM |
115 | else switch (mode->mode) { |
116 | case HOSTAPD_MODE_IEEE80211A: | |
117 | basic_rates = basic_rates_a; | |
118 | break; | |
119 | case HOSTAPD_MODE_IEEE80211B: | |
120 | basic_rates = basic_rates_b; | |
121 | break; | |
122 | case HOSTAPD_MODE_IEEE80211G: | |
123 | basic_rates = basic_rates_g; | |
124 | break; | |
7829894c VK |
125 | case HOSTAPD_MODE_IEEE80211AD: |
126 | return 0; /* No basic rates for 11ad */ | |
6fc6879b JM |
127 | default: |
128 | return -1; | |
129 | } | |
130 | ||
e5693c47 JM |
131 | i = 0; |
132 | while (basic_rates[i] >= 0) | |
133 | i++; | |
f0898e95 JM |
134 | if (i) |
135 | i++; /* -1 termination */ | |
34445d12 | 136 | os_free(iface->basic_rates); |
78018ae9 | 137 | iface->basic_rates = os_malloc(i * sizeof(int)); |
34445d12 | 138 | if (iface->basic_rates) |
78018ae9 | 139 | os_memcpy(iface->basic_rates, basic_rates, i * sizeof(int)); |
6fc6879b | 140 | |
34445d12 JM |
141 | os_free(iface->current_rates); |
142 | iface->num_rates = 0; | |
6fc6879b | 143 | |
34445d12 | 144 | iface->current_rates = |
f9884c09 | 145 | os_calloc(mode->num_rates, sizeof(struct hostapd_rate_data)); |
34445d12 | 146 | if (!iface->current_rates) { |
6fc6879b JM |
147 | wpa_printf(MSG_ERROR, "Failed to allocate memory for rate " |
148 | "table."); | |
149 | return -1; | |
150 | } | |
151 | ||
152 | for (i = 0; i < mode->num_rates; i++) { | |
153 | struct hostapd_rate_data *rate; | |
154 | ||
34445d12 JM |
155 | if (iface->conf->supported_rates && |
156 | !hostapd_rate_found(iface->conf->supported_rates, | |
fb7842aa | 157 | mode->rates[i])) |
6fc6879b JM |
158 | continue; |
159 | ||
34445d12 | 160 | rate = &iface->current_rates[iface->num_rates]; |
fb7842aa | 161 | rate->rate = mode->rates[i]; |
6fc6879b JM |
162 | if (hostapd_rate_found(basic_rates, rate->rate)) { |
163 | rate->flags |= HOSTAPD_RATE_BASIC; | |
164 | num_basic_rates++; | |
fb7842aa | 165 | } |
6fc6879b | 166 | wpa_printf(MSG_DEBUG, "RATE[%d] rate=%d flags=0x%x", |
34445d12 JM |
167 | iface->num_rates, rate->rate, rate->flags); |
168 | iface->num_rates++; | |
6fc6879b JM |
169 | } |
170 | ||
34445d12 JM |
171 | if ((iface->num_rates == 0 || num_basic_rates == 0) && |
172 | (!iface->conf->ieee80211n || !iface->conf->require_ht)) { | |
6fc6879b JM |
173 | wpa_printf(MSG_ERROR, "No rates remaining in supported/basic " |
174 | "rate sets (%d,%d).", | |
34445d12 | 175 | iface->num_rates, num_basic_rates); |
6fc6879b JM |
176 | return -1; |
177 | } | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | ||
3e0cb2c5 JM |
183 | #ifdef CONFIG_IEEE80211N |
184 | static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface) | |
185 | { | |
186 | int sec_chan, ok, j, first; | |
187 | int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157, | |
188 | 184, 192 }; | |
189 | size_t k; | |
190 | ||
191 | if (!iface->conf->secondary_channel) | |
192 | return 1; /* HT40 not used */ | |
193 | ||
194 | sec_chan = iface->conf->channel + iface->conf->secondary_channel * 4; | |
195 | wpa_printf(MSG_DEBUG, "HT40: control channel: %d " | |
196 | "secondary channel: %d", | |
197 | iface->conf->channel, sec_chan); | |
198 | ||
199 | /* Verify that HT40 secondary channel is an allowed 20 MHz | |
200 | * channel */ | |
201 | ok = 0; | |
202 | for (j = 0; j < iface->current_mode->num_channels; j++) { | |
203 | struct hostapd_channel_data *chan = | |
204 | &iface->current_mode->channels[j]; | |
205 | if (!(chan->flag & HOSTAPD_CHAN_DISABLED) && | |
206 | chan->chan == sec_chan) { | |
207 | ok = 1; | |
208 | break; | |
209 | } | |
210 | } | |
211 | if (!ok) { | |
212 | wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed", | |
213 | sec_chan); | |
214 | return 0; | |
215 | } | |
216 | ||
217 | /* | |
218 | * Verify that HT40 primary,secondary channel pair is allowed per | |
219 | * IEEE 802.11n Annex J. This is only needed for 5 GHz band since | |
220 | * 2.4 GHz rules allow all cases where the secondary channel fits into | |
221 | * the list of allowed channels (already checked above). | |
222 | */ | |
223 | if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A) | |
224 | return 1; | |
225 | ||
226 | if (iface->conf->secondary_channel > 0) | |
227 | first = iface->conf->channel; | |
228 | else | |
229 | first = sec_chan; | |
230 | ||
231 | ok = 0; | |
232 | for (k = 0; k < sizeof(allowed) / sizeof(allowed[0]); k++) { | |
233 | if (first == allowed[k]) { | |
234 | ok = 1; | |
235 | break; | |
236 | } | |
237 | } | |
238 | if (!ok) { | |
239 | wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed", | |
240 | iface->conf->channel, | |
241 | iface->conf->secondary_channel); | |
242 | return 0; | |
243 | } | |
244 | ||
245 | return 1; | |
246 | } | |
30fd5f14 JM |
247 | |
248 | ||
5eb4e3d0 JM |
249 | static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface) |
250 | { | |
251 | if (iface->conf->secondary_channel > 0) { | |
252 | iface->conf->channel += 4; | |
253 | iface->conf->secondary_channel = -1; | |
254 | } else { | |
255 | iface->conf->channel -= 4; | |
256 | iface->conf->secondary_channel = 1; | |
257 | } | |
258 | } | |
259 | ||
260 | ||
ad1e68e6 JM |
261 | static void ieee80211n_get_pri_sec_chan(struct wpa_scan_res *bss, |
262 | int *pri_chan, int *sec_chan) | |
263 | { | |
264 | struct ieee80211_ht_operation *oper; | |
265 | struct ieee802_11_elems elems; | |
266 | ||
267 | *pri_chan = *sec_chan = 0; | |
268 | ||
269 | ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0); | |
270 | if (elems.ht_operation && | |
271 | elems.ht_operation_len >= sizeof(*oper)) { | |
272 | oper = (struct ieee80211_ht_operation *) elems.ht_operation; | |
273 | *pri_chan = oper->control_chan; | |
274 | if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) { | |
41619262 JM |
275 | int sec = oper->ht_param & |
276 | HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; | |
277 | if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) | |
ad1e68e6 | 278 | *sec_chan = *pri_chan + 4; |
41619262 | 279 | else if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) |
ad1e68e6 JM |
280 | *sec_chan = *pri_chan - 4; |
281 | } | |
282 | } | |
283 | } | |
284 | ||
285 | ||
286 | static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface, | |
287 | struct wpa_scan_results *scan_res) | |
5eb4e3d0 JM |
288 | { |
289 | int pri_chan, sec_chan, pri_freq, sec_freq, pri_bss, sec_bss; | |
ad1e68e6 JM |
290 | int bss_pri_chan, bss_sec_chan; |
291 | size_t i; | |
5eb4e3d0 JM |
292 | int match; |
293 | ||
294 | pri_chan = iface->conf->channel; | |
295 | sec_chan = iface->conf->secondary_channel * 4; | |
296 | pri_freq = hostapd_hw_get_freq(iface->bss[0], pri_chan); | |
297 | if (iface->conf->secondary_channel > 0) | |
298 | sec_freq = pri_freq + 20; | |
299 | else | |
300 | sec_freq = pri_freq - 20; | |
301 | ||
5eb4e3d0 JM |
302 | /* |
303 | * Switch PRI/SEC channels if Beacons were detected on selected SEC | |
304 | * channel, but not on selected PRI channel. | |
305 | */ | |
306 | pri_bss = sec_bss = 0; | |
ad1e68e6 JM |
307 | for (i = 0; i < scan_res->num; i++) { |
308 | struct wpa_scan_res *bss = scan_res->res[i]; | |
309 | if (bss->freq == pri_freq) | |
5eb4e3d0 | 310 | pri_bss++; |
ad1e68e6 | 311 | else if (bss->freq == sec_freq) |
5eb4e3d0 JM |
312 | sec_bss++; |
313 | } | |
314 | if (sec_bss && !pri_bss) { | |
315 | wpa_printf(MSG_INFO, "Switch own primary and secondary " | |
316 | "channel to get secondary channel with no Beacons " | |
317 | "from other BSSes"); | |
318 | ieee80211n_switch_pri_sec(iface); | |
319 | } | |
320 | ||
321 | /* | |
322 | * Match PRI/SEC channel with any existing HT40 BSS on the same | |
323 | * channels that we are about to use (if already mixed order in | |
324 | * existing BSSes, use own preference). | |
325 | */ | |
326 | match = 0; | |
ad1e68e6 JM |
327 | for (i = 0; i < scan_res->num; i++) { |
328 | struct wpa_scan_res *bss = scan_res->res[i]; | |
329 | ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan); | |
330 | if (pri_chan == bss_pri_chan && | |
331 | sec_chan == bss_sec_chan) { | |
5eb4e3d0 JM |
332 | match = 1; |
333 | break; | |
334 | } | |
335 | } | |
336 | if (!match) { | |
ad1e68e6 JM |
337 | for (i = 0; i < scan_res->num; i++) { |
338 | struct wpa_scan_res *bss = scan_res->res[i]; | |
c6313c75 FF |
339 | ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, |
340 | &bss_sec_chan); | |
ad1e68e6 JM |
341 | if (pri_chan == bss_sec_chan && |
342 | sec_chan == bss_pri_chan) { | |
5eb4e3d0 JM |
343 | wpa_printf(MSG_INFO, "Switch own primary and " |
344 | "secondary channel due to BSS " | |
345 | "overlap with " MACSTR, | |
ad1e68e6 | 346 | MAC2STR(bss->bssid)); |
5eb4e3d0 JM |
347 | ieee80211n_switch_pri_sec(iface); |
348 | break; | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | return 1; | |
354 | } | |
355 | ||
356 | ||
ad1e68e6 JM |
357 | static int ieee80211n_check_40mhz_2g4(struct hostapd_iface *iface, |
358 | struct wpa_scan_results *scan_res) | |
5eb4e3d0 JM |
359 | { |
360 | int pri_freq, sec_freq; | |
361 | int affected_start, affected_end; | |
ad1e68e6 | 362 | size_t i; |
5eb4e3d0 JM |
363 | |
364 | pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel); | |
365 | if (iface->conf->secondary_channel > 0) | |
366 | sec_freq = pri_freq + 20; | |
367 | else | |
368 | sec_freq = pri_freq - 20; | |
369 | affected_start = (pri_freq + sec_freq) / 2 - 25; | |
370 | affected_end = (pri_freq + sec_freq) / 2 + 25; | |
371 | wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", | |
372 | affected_start, affected_end); | |
ad1e68e6 JM |
373 | for (i = 0; i < scan_res->num; i++) { |
374 | struct wpa_scan_res *bss = scan_res->res[i]; | |
375 | int pri = bss->freq; | |
5eb4e3d0 | 376 | int sec = pri; |
ad1e68e6 JM |
377 | int sec_chan, pri_chan; |
378 | ||
379 | ieee80211n_get_pri_sec_chan(bss, &pri_chan, &sec_chan); | |
380 | ||
381 | if (sec_chan) { | |
382 | if (sec_chan < pri_chan) | |
5eb4e3d0 JM |
383 | sec = pri - 20; |
384 | else | |
385 | sec = pri + 20; | |
386 | } | |
387 | ||
388 | if ((pri < affected_start || pri > affected_end) && | |
389 | (sec < affected_start || sec > affected_end)) | |
390 | continue; /* not within affected channel range */ | |
391 | ||
ad1e68e6 JM |
392 | wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR |
393 | " freq=%d pri=%d sec=%d", | |
394 | MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan); | |
395 | ||
396 | if (sec_chan) { | |
5eb4e3d0 JM |
397 | if (pri_freq != pri || sec_freq != sec) { |
398 | wpa_printf(MSG_DEBUG, "40 MHz pri/sec " | |
399 | "mismatch with BSS " MACSTR | |
400 | " <%d,%d> (chan=%d%c) vs. <%d,%d>", | |
ad1e68e6 JM |
401 | MAC2STR(bss->bssid), |
402 | pri, sec, pri_chan, | |
5eb4e3d0 JM |
403 | sec > pri ? '+' : '-', |
404 | pri_freq, sec_freq); | |
405 | return 0; | |
406 | } | |
407 | } | |
408 | ||
409 | /* TODO: 40 MHz intolerant */ | |
410 | } | |
411 | ||
412 | return 1; | |
413 | } | |
414 | ||
415 | ||
ad1e68e6 | 416 | static void ieee80211n_check_scan(struct hostapd_iface *iface) |
5eb4e3d0 | 417 | { |
ad1e68e6 | 418 | struct wpa_scan_results *scan_res; |
5eb4e3d0 | 419 | int oper40; |
7615078c | 420 | int res; |
5eb4e3d0 | 421 | |
5eb4e3d0 | 422 | /* Check list of neighboring BSSes (from scan) to see whether 40 MHz is |
7fa56233 | 423 | * allowed per IEEE Std 802.11-2012, 10.15.3.2 */ |
5eb4e3d0 | 424 | |
ad1e68e6 JM |
425 | iface->scan_cb = NULL; |
426 | ||
427 | scan_res = hostapd_driver_get_scan_results(iface->bss[0]); | |
428 | if (scan_res == NULL) { | |
429 | hostapd_setup_interface_complete(iface, 1); | |
430 | return; | |
431 | } | |
432 | ||
5eb4e3d0 | 433 | if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A) |
ad1e68e6 | 434 | oper40 = ieee80211n_check_40mhz_5g(iface, scan_res); |
5eb4e3d0 | 435 | else |
ad1e68e6 JM |
436 | oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res); |
437 | wpa_scan_results_free(scan_res); | |
5eb4e3d0 JM |
438 | |
439 | if (!oper40) { | |
440 | wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on " | |
441 | "channel pri=%d sec=%d based on overlapping BSSes", | |
442 | iface->conf->channel, | |
443 | iface->conf->channel + | |
444 | iface->conf->secondary_channel * 4); | |
445 | iface->conf->secondary_channel = 0; | |
5eb4e3d0 | 446 | } |
ad1e68e6 | 447 | |
7615078c JM |
448 | res = ieee80211n_allowed_ht40_channel_pair(iface); |
449 | hostapd_setup_interface_complete(iface, !res); | |
ad1e68e6 JM |
450 | } |
451 | ||
452 | ||
7fa56233 JM |
453 | static void ieee80211n_scan_channels_2g4(struct hostapd_iface *iface, |
454 | struct wpa_driver_scan_params *params) | |
455 | { | |
456 | /* Scan only the affected frequency range */ | |
457 | int pri_freq, sec_freq; | |
458 | int affected_start, affected_end; | |
459 | int i, pos; | |
460 | struct hostapd_hw_modes *mode; | |
461 | ||
462 | if (iface->current_mode == NULL) | |
463 | return; | |
464 | ||
465 | pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel); | |
466 | if (iface->conf->secondary_channel > 0) | |
467 | sec_freq = pri_freq + 20; | |
468 | else | |
469 | sec_freq = pri_freq - 20; | |
470 | affected_start = (pri_freq + sec_freq) / 2 - 25; | |
471 | affected_end = (pri_freq + sec_freq) / 2 + 25; | |
472 | wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", | |
473 | affected_start, affected_end); | |
474 | ||
475 | mode = iface->current_mode; | |
f9884c09 | 476 | params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); |
7fa56233 JM |
477 | if (params->freqs == NULL) |
478 | return; | |
479 | pos = 0; | |
480 | ||
481 | for (i = 0; i < mode->num_channels; i++) { | |
482 | struct hostapd_channel_data *chan = &mode->channels[i]; | |
483 | if (chan->flag & HOSTAPD_CHAN_DISABLED) | |
484 | continue; | |
485 | if (chan->freq < affected_start || | |
486 | chan->freq > affected_end) | |
487 | continue; | |
488 | params->freqs[pos++] = chan->freq; | |
489 | } | |
490 | } | |
491 | ||
492 | ||
ad1e68e6 JM |
493 | static int ieee80211n_check_40mhz(struct hostapd_iface *iface) |
494 | { | |
495 | struct wpa_driver_scan_params params; | |
496 | ||
497 | if (!iface->conf->secondary_channel) | |
498 | return 0; /* HT40 not used */ | |
499 | ||
500 | wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling " | |
501 | "40 MHz channel"); | |
502 | os_memset(¶ms, 0, sizeof(params)); | |
7fa56233 JM |
503 | if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) |
504 | ieee80211n_scan_channels_2g4(iface, ¶ms); | |
ad1e68e6 JM |
505 | if (hostapd_driver_scan(iface->bss[0], ¶ms) < 0) { |
506 | wpa_printf(MSG_ERROR, "Failed to request a scan of " | |
507 | "neighboring BSSes"); | |
7fa56233 | 508 | os_free(params.freqs); |
ad1e68e6 JM |
509 | return -1; |
510 | } | |
7fa56233 | 511 | os_free(params.freqs); |
ad1e68e6 JM |
512 | |
513 | iface->scan_cb = ieee80211n_check_scan; | |
514 | return 1; | |
5eb4e3d0 JM |
515 | } |
516 | ||
517 | ||
30fd5f14 JM |
518 | static int ieee80211n_supported_ht_capab(struct hostapd_iface *iface) |
519 | { | |
520 | u16 hw = iface->current_mode->ht_capab; | |
521 | u16 conf = iface->conf->ht_capab; | |
522 | ||
30fd5f14 JM |
523 | if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) && |
524 | !(hw & HT_CAP_INFO_LDPC_CODING_CAP)) { | |
525 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
526 | "HT capability [LDPC]"); | |
527 | return 0; | |
528 | } | |
529 | ||
530 | if ((conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) && | |
531 | !(hw & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) { | |
532 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
533 | "HT capability [HT40*]"); | |
534 | return 0; | |
535 | } | |
536 | ||
537 | if ((conf & HT_CAP_INFO_SMPS_MASK) != (hw & HT_CAP_INFO_SMPS_MASK) && | |
538 | (conf & HT_CAP_INFO_SMPS_MASK) != HT_CAP_INFO_SMPS_DISABLED) { | |
539 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
540 | "HT capability [SMPS-*]"); | |
541 | return 0; | |
542 | } | |
543 | ||
544 | if ((conf & HT_CAP_INFO_GREEN_FIELD) && | |
545 | !(hw & HT_CAP_INFO_GREEN_FIELD)) { | |
546 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
547 | "HT capability [GF]"); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | if ((conf & HT_CAP_INFO_SHORT_GI20MHZ) && | |
552 | !(hw & HT_CAP_INFO_SHORT_GI20MHZ)) { | |
553 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
554 | "HT capability [SHORT-GI-20]"); | |
555 | return 0; | |
556 | } | |
557 | ||
558 | if ((conf & HT_CAP_INFO_SHORT_GI40MHZ) && | |
559 | !(hw & HT_CAP_INFO_SHORT_GI40MHZ)) { | |
560 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
561 | "HT capability [SHORT-GI-40]"); | |
562 | return 0; | |
563 | } | |
564 | ||
565 | if ((conf & HT_CAP_INFO_TX_STBC) && !(hw & HT_CAP_INFO_TX_STBC)) { | |
566 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
567 | "HT capability [TX-STBC]"); | |
568 | return 0; | |
569 | } | |
570 | ||
571 | if ((conf & HT_CAP_INFO_RX_STBC_MASK) > | |
572 | (hw & HT_CAP_INFO_RX_STBC_MASK)) { | |
573 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
574 | "HT capability [RX-STBC*]"); | |
575 | return 0; | |
576 | } | |
577 | ||
578 | if ((conf & HT_CAP_INFO_DELAYED_BA) && | |
579 | !(hw & HT_CAP_INFO_DELAYED_BA)) { | |
580 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
581 | "HT capability [DELAYED-BA]"); | |
582 | return 0; | |
583 | } | |
584 | ||
585 | if ((conf & HT_CAP_INFO_MAX_AMSDU_SIZE) && | |
586 | !(hw & HT_CAP_INFO_MAX_AMSDU_SIZE)) { | |
587 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
588 | "HT capability [MAX-AMSDU-7935]"); | |
589 | return 0; | |
590 | } | |
591 | ||
592 | if ((conf & HT_CAP_INFO_DSSS_CCK40MHZ) && | |
593 | !(hw & HT_CAP_INFO_DSSS_CCK40MHZ)) { | |
594 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
595 | "HT capability [DSSS_CCK-40]"); | |
596 | return 0; | |
597 | } | |
598 | ||
599 | if ((conf & HT_CAP_INFO_PSMP_SUPP) && !(hw & HT_CAP_INFO_PSMP_SUPP)) { | |
600 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
601 | "HT capability [PSMP]"); | |
602 | return 0; | |
603 | } | |
604 | ||
605 | if ((conf & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT) && | |
606 | !(hw & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT)) { | |
607 | wpa_printf(MSG_ERROR, "Driver does not support configured " | |
608 | "HT capability [LSIG-TXOP-PROT]"); | |
609 | return 0; | |
610 | } | |
611 | ||
612 | return 1; | |
613 | } | |
ad1e68e6 JM |
614 | |
615 | #endif /* CONFIG_IEEE80211N */ | |
616 | ||
617 | ||
618 | int hostapd_check_ht_capab(struct hostapd_iface *iface) | |
619 | { | |
620 | #ifdef CONFIG_IEEE80211N | |
621 | int ret; | |
ec2b8909 SM |
622 | if (!iface->conf->ieee80211n) |
623 | return 0; | |
1b4d3793 NS |
624 | if (!ieee80211n_supported_ht_capab(iface)) |
625 | return -1; | |
ad1e68e6 JM |
626 | ret = ieee80211n_check_40mhz(iface); |
627 | if (ret) | |
628 | return ret; | |
629 | if (!ieee80211n_allowed_ht40_channel_pair(iface)) | |
630 | return -1; | |
3e0cb2c5 JM |
631 | #endif /* CONFIG_IEEE80211N */ |
632 | ||
ad1e68e6 JM |
633 | return 0; |
634 | } | |
635 | ||
3e0cb2c5 | 636 | |
245e026e MK |
637 | static int hostapd_is_usable_chan(struct hostapd_iface *iface, |
638 | int channel, int primary) | |
639 | { | |
640 | int i; | |
641 | struct hostapd_channel_data *chan; | |
642 | ||
643 | for (i = 0; i < iface->current_mode->num_channels; i++) { | |
644 | chan = &iface->current_mode->channels[i]; | |
645 | if (chan->chan != channel) | |
646 | continue; | |
647 | ||
648 | if (!(chan->flag & HOSTAPD_CHAN_DISABLED)) | |
649 | return 1; | |
650 | ||
651 | wpa_printf(MSG_DEBUG, | |
652 | "%schannel [%i] (%i) is disabled for use in AP mode, flags: 0x%x%s%s%s", | |
653 | primary ? "" : "Configured HT40 secondary ", | |
654 | i, chan->chan, chan->flag, | |
655 | chan->flag & HOSTAPD_CHAN_NO_IBSS ? " NO-IBSS" : "", | |
656 | chan->flag & HOSTAPD_CHAN_PASSIVE_SCAN ? | |
657 | " PASSIVE-SCAN" : "", | |
658 | chan->flag & HOSTAPD_CHAN_RADAR ? " RADAR" : ""); | |
659 | } | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | ||
665 | static int hostapd_is_usable_chans(struct hostapd_iface *iface) | |
666 | { | |
667 | if (!hostapd_is_usable_chan(iface, iface->conf->channel, 1)) | |
668 | return 0; | |
669 | ||
670 | if (!iface->conf->secondary_channel) | |
671 | return 1; | |
672 | ||
673 | return hostapd_is_usable_chan(iface, iface->conf->channel + | |
674 | iface->conf->secondary_channel * 4, 0); | |
675 | } | |
676 | ||
677 | ||
678 | static enum hostapd_chan_status | |
679 | hostapd_check_chans(struct hostapd_iface *iface) | |
680 | { | |
681 | if (iface->conf->channel) { | |
682 | if (hostapd_is_usable_chans(iface)) | |
683 | return HOSTAPD_CHAN_VALID; | |
684 | else | |
685 | return HOSTAPD_CHAN_INVALID; | |
686 | } | |
687 | ||
688 | /* | |
689 | * The user set channel=0 which is used to trigger ACS, | |
690 | * which we do not yet support. | |
691 | */ | |
692 | return HOSTAPD_CHAN_INVALID; | |
693 | } | |
694 | ||
695 | ||
696 | static void hostapd_notify_bad_chans(struct hostapd_iface *iface) | |
697 | { | |
698 | hostapd_logger(iface->bss[0], NULL, | |
699 | HOSTAPD_MODULE_IEEE80211, | |
700 | HOSTAPD_LEVEL_WARNING, | |
701 | "Configured channel (%d) not found from the " | |
702 | "channel list of current mode (%d) %s", | |
703 | iface->conf->channel, | |
704 | iface->current_mode->mode, | |
705 | hostapd_hw_mode_txt(iface->current_mode->mode)); | |
706 | hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211, | |
707 | HOSTAPD_LEVEL_WARNING, | |
708 | "Hardware does not support configured channel"); | |
709 | } | |
710 | ||
711 | ||
6fc6879b | 712 | /** |
ddaa83eb | 713 | * hostapd_select_hw_mode - Select the hardware mode |
6fc6879b | 714 | * @iface: Pointer to interface data. |
60eda5e4 | 715 | * Returns: 0 on success, < 0 on failure |
6fc6879b | 716 | * |
ddaa83eb JM |
717 | * Sets up the hardware mode, channel, rates, and passive scanning |
718 | * based on the configuration. | |
6fc6879b | 719 | */ |
ddaa83eb | 720 | int hostapd_select_hw_mode(struct hostapd_iface *iface) |
6fc6879b | 721 | { |
245e026e | 722 | int i; |
6fc6879b JM |
723 | |
724 | if (iface->num_hw_features < 1) | |
725 | return -1; | |
726 | ||
727 | iface->current_mode = NULL; | |
728 | for (i = 0; i < iface->num_hw_features; i++) { | |
729 | struct hostapd_hw_modes *mode = &iface->hw_features[i]; | |
6caf9ca6 | 730 | if (mode->mode == iface->conf->hw_mode) { |
6fc6879b JM |
731 | iface->current_mode = mode; |
732 | break; | |
733 | } | |
734 | } | |
735 | ||
736 | if (iface->current_mode == NULL) { | |
737 | wpa_printf(MSG_ERROR, "Hardware does not support configured " | |
738 | "mode"); | |
739 | hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211, | |
740 | HOSTAPD_LEVEL_WARNING, | |
741 | "Hardware does not support configured mode " | |
93ac2404 JM |
742 | "(%d) (hw_mode in hostapd.conf)", |
743 | (int) iface->conf->hw_mode); | |
60eda5e4 | 744 | return -2; |
6fc6879b JM |
745 | } |
746 | ||
245e026e MK |
747 | switch (hostapd_check_chans(iface)) { |
748 | case HOSTAPD_CHAN_VALID: | |
749 | return 0; | |
750 | case HOSTAPD_CHAN_ACS: /* ACS not supported yet */ | |
751 | case HOSTAPD_CHAN_INVALID: | |
752 | default: | |
753 | hostapd_notify_bad_chans(iface); | |
60eda5e4 | 754 | return -3; |
24c9fceb | 755 | } |
6fc6879b | 756 | |
61693eaa | 757 | return 0; |
6fc6879b JM |
758 | } |
759 | ||
760 | ||
761 | const char * hostapd_hw_mode_txt(int mode) | |
762 | { | |
763 | switch (mode) { | |
764 | case HOSTAPD_MODE_IEEE80211A: | |
765 | return "IEEE 802.11a"; | |
766 | case HOSTAPD_MODE_IEEE80211B: | |
767 | return "IEEE 802.11b"; | |
768 | case HOSTAPD_MODE_IEEE80211G: | |
769 | return "IEEE 802.11g"; | |
7829894c VK |
770 | case HOSTAPD_MODE_IEEE80211AD: |
771 | return "IEEE 802.11ad"; | |
6fc6879b JM |
772 | default: |
773 | return "UNKNOWN"; | |
774 | } | |
775 | } | |
776 | ||
777 | ||
778 | int hostapd_hw_get_freq(struct hostapd_data *hapd, int chan) | |
779 | { | |
780 | int i; | |
781 | ||
782 | if (!hapd->iface->current_mode) | |
783 | return 0; | |
784 | ||
785 | for (i = 0; i < hapd->iface->current_mode->num_channels; i++) { | |
786 | struct hostapd_channel_data *ch = | |
787 | &hapd->iface->current_mode->channels[i]; | |
788 | if (ch->chan == chan) | |
789 | return ch->freq; | |
790 | } | |
791 | ||
792 | return 0; | |
793 | } | |
794 | ||
795 | ||
796 | int hostapd_hw_get_channel(struct hostapd_data *hapd, int freq) | |
797 | { | |
798 | int i; | |
799 | ||
800 | if (!hapd->iface->current_mode) | |
801 | return 0; | |
802 | ||
803 | for (i = 0; i < hapd->iface->current_mode->num_channels; i++) { | |
804 | struct hostapd_channel_data *ch = | |
805 | &hapd->iface->current_mode->channels[i]; | |
806 | if (ch->freq == freq) | |
807 | return ch->chan; | |
808 | } | |
809 | ||
810 | return 0; | |
811 | } |