1 /*
2 * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
3 * Copyright (c) 2002-2004, Instant802 Networks, Inc.
4 * Copyright (c) 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 #ifndef CONFIG_NATIVE_WINDOWS
14
15 #include "utils/common.h"
16 #include "common/ieee802_11_defs.h"
17 #include "common/ieee802_11_common.h"
18 #include "common/hw_features_common.h"
19 #include "common/wpa_ctrl.h"
20 #include "wps/wps_defs.h"
21 #include "p2p/p2p.h"
22 #include "hostapd.h"
23 #include "ieee802_11.h"
24 #include "wpa_auth.h"
25 #include "wmm.h"
26 #include "ap_config.h"
27 #include "sta_info.h"
28 #include "p2p_hostapd.h"
29 #include "ap_drv_ops.h"
30 #include "beacon.h"
31 #include "hs20.h"
32 #include "dfs.h"
33 #include "taxonomy.h"
34 #include "ieee802_11_auth.h"
35
36
37 #ifdef NEED_AP_MLME
38
hostapd_eid_rm_enabled_capab(struct hostapd_data * hapd,u8 * eid,size_t len)39 static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
40 size_t len)
41 {
42 size_t i;
43
44 for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
45 if (hapd->conf->radio_measurements[i])
46 break;
47 }
48
49 if (i == RRM_CAPABILITIES_IE_LEN || len < 2 + RRM_CAPABILITIES_IE_LEN)
50 return eid;
51
52 *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
53 *eid++ = RRM_CAPABILITIES_IE_LEN;
54 os_memcpy(eid, hapd->conf->radio_measurements, RRM_CAPABILITIES_IE_LEN);
55
56 return eid + RRM_CAPABILITIES_IE_LEN;
57 }
58
59
hostapd_eid_bss_load(struct hostapd_data * hapd,u8 * eid,size_t len)60 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
61 {
62 if (len < 2 + 5)
63 return eid;
64
65 #ifdef CONFIG_TESTING_OPTIONS
66 if (hapd->conf->bss_load_test_set) {
67 *eid++ = WLAN_EID_BSS_LOAD;
68 *eid++ = 5;
69 os_memcpy(eid, hapd->conf->bss_load_test, 5);
70 eid += 5;
71 return eid;
72 }
73 #endif /* CONFIG_TESTING_OPTIONS */
74 if (hapd->conf->bss_load_update_period) {
75 *eid++ = WLAN_EID_BSS_LOAD;
76 *eid++ = 5;
77 WPA_PUT_LE16(eid, hapd->num_sta);
78 eid += 2;
79 *eid++ = hapd->iface->channel_utilization;
80 WPA_PUT_LE16(eid, 0); /* no available admission capabity */
81 eid += 2;
82 }
83 return eid;
84 }
85
86
ieee802_11_erp_info(struct hostapd_data * hapd)87 static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
88 {
89 u8 erp = 0;
90
91 if (hapd->iface->current_mode == NULL ||
92 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
93 return 0;
94
95 if (hapd->iface->olbc)
96 erp |= ERP_INFO_USE_PROTECTION;
97 if (hapd->iface->num_sta_non_erp > 0) {
98 erp |= ERP_INFO_NON_ERP_PRESENT |
99 ERP_INFO_USE_PROTECTION;
100 }
101 if (hapd->iface->num_sta_no_short_preamble > 0 ||
102 hapd->iconf->preamble == LONG_PREAMBLE)
103 erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
104
105 return erp;
106 }
107
108
hostapd_eid_ds_params(struct hostapd_data * hapd,u8 * eid)109 static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
110 {
111 *eid++ = WLAN_EID_DS_PARAMS;
112 *eid++ = 1;
113 *eid++ = hapd->iconf->channel;
114 return eid;
115 }
116
117
hostapd_eid_erp_info(struct hostapd_data * hapd,u8 * eid)118 static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
119 {
120 if (hapd->iface->current_mode == NULL ||
121 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
122 return eid;
123
124 /* Set NonERP_present and use_protection bits if there
125 * are any associated NonERP stations. */
126 /* TODO: use_protection bit can be set to zero even if
127 * there are NonERP stations present. This optimization
128 * might be useful if NonERP stations are "quiet".
129 * See 802.11g/D6 E-1 for recommended practice.
130 * In addition, Non ERP present might be set, if AP detects Non ERP
131 * operation on other APs. */
132
133 /* Add ERP Information element */
134 *eid++ = WLAN_EID_ERP_INFO;
135 *eid++ = 1;
136 *eid++ = ieee802_11_erp_info(hapd);
137
138 return eid;
139 }
140
141
hostapd_eid_pwr_constraint(struct hostapd_data * hapd,u8 * eid)142 static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
143 {
144 u8 *pos = eid;
145 u8 local_pwr_constraint = 0;
146 int dfs;
147
148 if (hapd->iface->current_mode == NULL ||
149 hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
150 return eid;
151
152 /* Let host drivers add this IE if DFS support is offloaded */
153 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
154 return eid;
155
156 /*
157 * There is no DFS support and power constraint was not directly
158 * requested by config option.
159 */
160 if (!hapd->iconf->ieee80211h &&
161 hapd->iconf->local_pwr_constraint == -1)
162 return eid;
163
164 /* Check if DFS is required by regulatory. */
165 dfs = hostapd_is_dfs_required(hapd->iface);
166 if (dfs < 0) {
167 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
168 dfs);
169 dfs = 0;
170 }
171
172 if (dfs == 0 && hapd->iconf->local_pwr_constraint == -1)
173 return eid;
174
175 /*
176 * ieee80211h (DFS) is enabled so Power Constraint element shall
177 * be added when running on DFS channel whenever local_pwr_constraint
178 * is configured or not. In order to meet regulations when TPC is not
179 * implemented using a transmit power that is below the legal maximum
180 * (including any mitigation factor) should help. In this case,
181 * indicate 3 dB below maximum allowed transmit power.
182 */
183 if (hapd->iconf->local_pwr_constraint == -1)
184 local_pwr_constraint = 3;
185
186 /*
187 * A STA that is not an AP shall use a transmit power less than or
188 * equal to the local maximum transmit power level for the channel.
189 * The local maximum transmit power can be calculated from the formula:
190 * local max TX pwr = max TX pwr - local pwr constraint
191 * Where max TX pwr is maximum transmit power level specified for
192 * channel in Country element and local pwr constraint is specified
193 * for channel in this Power Constraint element.
194 */
195
196 /* Element ID */
197 *pos++ = WLAN_EID_PWR_CONSTRAINT;
198 /* Length */
199 *pos++ = 1;
200 /* Local Power Constraint */
201 if (local_pwr_constraint)
202 *pos++ = local_pwr_constraint;
203 else
204 *pos++ = hapd->iconf->local_pwr_constraint;
205
206 return pos;
207 }
208
209
hostapd_eid_country_add(u8 * pos,u8 * end,int chan_spacing,struct hostapd_channel_data * start,struct hostapd_channel_data * prev)210 static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
211 struct hostapd_channel_data *start,
212 struct hostapd_channel_data *prev)
213 {
214 if (end - pos < 3)
215 return pos;
216
217 /* first channel number */
218 *pos++ = start->chan;
219 /* number of channels */
220 *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
221 /* maximum transmit power level */
222 *pos++ = start->max_tx_power;
223
224 return pos;
225 }
226
227
hostapd_eid_country(struct hostapd_data * hapd,u8 * eid,int max_len)228 static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
229 int max_len)
230 {
231 u8 *pos = eid;
232 u8 *end = eid + max_len;
233 int i;
234 struct hostapd_hw_modes *mode;
235 struct hostapd_channel_data *start, *prev;
236 int chan_spacing = 1;
237
238 if (!hapd->iconf->ieee80211d || max_len < 6 ||
239 hapd->iface->current_mode == NULL)
240 return eid;
241
242 *pos++ = WLAN_EID_COUNTRY;
243 pos++; /* length will be set later */
244 os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
245 pos += 3;
246
247 mode = hapd->iface->current_mode;
248 if (mode->mode == HOSTAPD_MODE_IEEE80211A)
249 chan_spacing = 4;
250
251 start = prev = NULL;
252 for (i = 0; i < mode->num_channels; i++) {
253 struct hostapd_channel_data *chan = &mode->channels[i];
254 if (chan->flag & HOSTAPD_CHAN_DISABLED)
255 continue;
256 if (start && prev &&
257 prev->chan + chan_spacing == chan->chan &&
258 start->max_tx_power == chan->max_tx_power) {
259 prev = chan;
260 continue; /* can use same entry */
261 }
262
263 if (start && prev) {
264 pos = hostapd_eid_country_add(pos, end, chan_spacing,
265 start, prev);
266 start = NULL;
267 }
268
269 /* Start new group */
270 start = prev = chan;
271 }
272
273 if (start) {
274 pos = hostapd_eid_country_add(pos, end, chan_spacing,
275 start, prev);
276 }
277
278 if ((pos - eid) & 1) {
279 if (end - pos < 1)
280 return eid;
281 *pos++ = 0; /* pad for 16-bit alignment */
282 }
283
284 eid[1] = (pos - eid) - 2;
285
286 return pos;
287 }
288
289
hostapd_eid_wpa(struct hostapd_data * hapd,u8 * eid,size_t len)290 static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
291 {
292 const u8 *ie;
293 size_t ielen;
294
295 ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
296 if (ie == NULL || ielen > len)
297 return eid;
298
299 os_memcpy(eid, ie, ielen);
300 return eid + ielen;
301 }
302
303
hostapd_eid_csa(struct hostapd_data * hapd,u8 * eid)304 static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
305 {
306 #ifdef CONFIG_TESTING_OPTIONS
307 if (hapd->iface->cs_oper_class && hapd->iconf->ecsa_ie_only)
308 return eid;
309 #endif /* CONFIG_TESTING_OPTIONS */
310
311 if (!hapd->cs_freq_params.channel)
312 return eid;
313
314 *eid++ = WLAN_EID_CHANNEL_SWITCH;
315 *eid++ = 3;
316 *eid++ = hapd->cs_block_tx;
317 *eid++ = hapd->cs_freq_params.channel;
318 *eid++ = hapd->cs_count;
319
320 return eid;
321 }
322
323
hostapd_eid_ecsa(struct hostapd_data * hapd,u8 * eid)324 static u8 * hostapd_eid_ecsa(struct hostapd_data *hapd, u8 *eid)
325 {
326 if (!hapd->cs_freq_params.channel || !hapd->iface->cs_oper_class)
327 return eid;
328
329 *eid++ = WLAN_EID_EXT_CHANSWITCH_ANN;
330 *eid++ = 4;
331 *eid++ = hapd->cs_block_tx;
332 *eid++ = hapd->iface->cs_oper_class;
333 *eid++ = hapd->cs_freq_params.channel;
334 *eid++ = hapd->cs_count;
335
336 return eid;
337 }
338
339
hostapd_eid_supported_op_classes(struct hostapd_data * hapd,u8 * eid)340 static u8 * hostapd_eid_supported_op_classes(struct hostapd_data *hapd, u8 *eid)
341 {
342 u8 op_class, channel;
343
344 if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) ||
345 !hapd->iface->freq)
346 return eid;
347
348 if (ieee80211_freq_to_channel_ext(hapd->iface->freq,
349 hapd->iconf->secondary_channel,
350 hostapd_get_oper_chwidth(hapd->iconf),
351 &op_class, &channel) ==
352 NUM_HOSTAPD_MODES)
353 return eid;
354
355 *eid++ = WLAN_EID_SUPPORTED_OPERATING_CLASSES;
356 *eid++ = 2;
357
358 /* Current Operating Class */
359 *eid++ = op_class;
360
361 /* TODO: Advertise all the supported operating classes */
362 *eid++ = 0;
363
364 return eid;
365 }
366
367
hostapd_gen_probe_resp(struct hostapd_data * hapd,const struct ieee80211_mgmt * req,int is_p2p,size_t * resp_len)368 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
369 const struct ieee80211_mgmt *req,
370 int is_p2p, size_t *resp_len)
371 {
372 struct ieee80211_mgmt *resp;
373 u8 *pos, *epos, *csa_pos;
374 size_t buflen;
375
376 #define MAX_PROBERESP_LEN 768
377 buflen = MAX_PROBERESP_LEN;
378 #ifdef CONFIG_WPS
379 if (hapd->wps_probe_resp_ie)
380 buflen += wpabuf_len(hapd->wps_probe_resp_ie);
381 #endif /* CONFIG_WPS */
382 #ifdef CONFIG_P2P
383 if (hapd->p2p_probe_resp_ie)
384 buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
385 #endif /* CONFIG_P2P */
386 #ifdef CONFIG_FST
387 if (hapd->iface->fst_ies)
388 buflen += wpabuf_len(hapd->iface->fst_ies);
389 #endif /* CONFIG_FST */
390 if (hapd->conf->vendor_elements)
391 buflen += wpabuf_len(hapd->conf->vendor_elements);
392 if (hapd->conf->vendor_vht) {
393 buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
394 2 + sizeof(struct ieee80211_vht_operation);
395 }
396
397 #ifdef CONFIG_IEEE80211AX
398 if (hapd->iconf->ieee80211ax) {
399 buflen += 3 + sizeof(struct ieee80211_he_capabilities) +
400 3 + sizeof(struct ieee80211_he_operation) +
401 3 + sizeof(struct ieee80211_he_mu_edca_parameter_set) +
402 3 + sizeof(struct ieee80211_spatial_reuse);
403 }
404 #endif /* CONFIG_IEEE80211AX */
405
406 buflen += hostapd_mbo_ie_len(hapd);
407 buflen += hostapd_eid_owe_trans_len(hapd);
408
409 resp = os_zalloc(buflen);
410 if (resp == NULL)
411 return NULL;
412
413 epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
414
415 resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
416 WLAN_FC_STYPE_PROBE_RESP);
417 if (req)
418 os_memcpy(resp->da, req->sa, ETH_ALEN);
419 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
420
421 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
422 resp->u.probe_resp.beacon_int =
423 host_to_le16(hapd->iconf->beacon_int);
424
425 /* hardware or low-level driver will setup seq_ctrl and timestamp */
426 resp->u.probe_resp.capab_info =
427 host_to_le16(hostapd_own_capab_info(hapd));
428
429 pos = resp->u.probe_resp.variable;
430 *pos++ = WLAN_EID_SSID;
431 *pos++ = hapd->conf->ssid.ssid_len;
432 os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
433 pos += hapd->conf->ssid.ssid_len;
434
435 /* Supported rates */
436 pos = hostapd_eid_supp_rates(hapd, pos);
437
438 /* DS Params */
439 pos = hostapd_eid_ds_params(hapd, pos);
440
441 pos = hostapd_eid_country(hapd, pos, epos - pos);
442
443 /* Power Constraint element */
444 pos = hostapd_eid_pwr_constraint(hapd, pos);
445
446 /* CSA IE */
447 csa_pos = hostapd_eid_csa(hapd, pos);
448 if (csa_pos != pos)
449 hapd->cs_c_off_proberesp = csa_pos - (u8 *) resp - 1;
450 pos = csa_pos;
451
452 /* ERP Information element */
453 pos = hostapd_eid_erp_info(hapd, pos);
454
455 /* Extended supported rates */
456 pos = hostapd_eid_ext_supp_rates(hapd, pos);
457
458 /* RSN, MDIE */
459 if (hapd->conf->wpa != WPA_PROTO_WPA)
460 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
461
462 pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
463
464 pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
465
466 /* eCSA IE */
467 csa_pos = hostapd_eid_ecsa(hapd, pos);
468 if (csa_pos != pos)
469 hapd->cs_c_off_ecsa_proberesp = csa_pos - (u8 *) resp - 1;
470 pos = csa_pos;
471
472 pos = hostapd_eid_supported_op_classes(hapd, pos);
473
474 #ifdef CONFIG_IEEE80211N
475 /* Secondary Channel Offset element */
476 /* TODO: The standard doesn't specify a position for this element. */
477 pos = hostapd_eid_secondary_channel(hapd, pos);
478
479 pos = hostapd_eid_ht_capabilities(hapd, pos);
480 pos = hostapd_eid_ht_operation(hapd, pos);
481 #endif /* CONFIG_IEEE80211N */
482
483 pos = hostapd_eid_ext_capab(hapd, pos);
484
485 pos = hostapd_eid_time_adv(hapd, pos);
486 pos = hostapd_eid_time_zone(hapd, pos);
487
488 pos = hostapd_eid_interworking(hapd, pos);
489 pos = hostapd_eid_adv_proto(hapd, pos);
490 pos = hostapd_eid_roaming_consortium(hapd, pos);
491
492 #ifdef CONFIG_FST
493 if (hapd->iface->fst_ies) {
494 os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
495 wpabuf_len(hapd->iface->fst_ies));
496 pos += wpabuf_len(hapd->iface->fst_ies);
497 }
498 #endif /* CONFIG_FST */
499
500 #ifdef CONFIG_IEEE80211AC
501 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
502 pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
503 pos = hostapd_eid_vht_operation(hapd, pos);
504 pos = hostapd_eid_txpower_envelope(hapd, pos);
505 pos = hostapd_eid_wb_chsw_wrapper(hapd, pos);
506 }
507 #endif /* CONFIG_IEEE80211AC */
508
509 pos = hostapd_eid_fils_indic(hapd, pos, 0);
510
511 #ifdef CONFIG_IEEE80211AX
512 if (hapd->iconf->ieee80211ax) {
513 pos = hostapd_eid_he_capab(hapd, pos, IEEE80211_MODE_AP);
514 pos = hostapd_eid_he_operation(hapd, pos);
515 pos = hostapd_eid_he_mu_edca_parameter_set(hapd, pos);
516 pos = hostapd_eid_spatial_reuse(hapd, pos);
517 }
518 #endif /* CONFIG_IEEE80211AX */
519
520 #ifdef CONFIG_IEEE80211AC
521 if (hapd->conf->vendor_vht)
522 pos = hostapd_eid_vendor_vht(hapd, pos);
523 #endif /* CONFIG_IEEE80211AC */
524
525 /* WPA */
526 if (hapd->conf->wpa == WPA_PROTO_WPA)
527 pos = hostapd_eid_wpa(hapd, pos, epos - pos);
528
529 /* Wi-Fi Alliance WMM */
530 pos = hostapd_eid_wmm(hapd, pos);
531
532 #ifdef CONFIG_WPS
533 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
534 os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
535 wpabuf_len(hapd->wps_probe_resp_ie));
536 pos += wpabuf_len(hapd->wps_probe_resp_ie);
537 }
538 #endif /* CONFIG_WPS */
539
540 #ifdef CONFIG_P2P
541 if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
542 hapd->p2p_probe_resp_ie) {
543 os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
544 wpabuf_len(hapd->p2p_probe_resp_ie));
545 pos += wpabuf_len(hapd->p2p_probe_resp_ie);
546 }
547 #endif /* CONFIG_P2P */
548 #ifdef CONFIG_P2P_MANAGER
549 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
550 P2P_MANAGE)
551 pos = hostapd_eid_p2p_manage(hapd, pos);
552 #endif /* CONFIG_P2P_MANAGER */
553
554 #ifdef CONFIG_HS20
555 pos = hostapd_eid_hs20_indication(hapd, pos);
556 pos = hostapd_eid_osen(hapd, pos);
557 #endif /* CONFIG_HS20 */
558
559 pos = hostapd_eid_mbo(hapd, pos, (u8 *) resp + buflen - pos);
560 pos = hostapd_eid_owe_trans(hapd, pos, (u8 *) resp + buflen - pos);
561
562 if (hapd->conf->vendor_elements) {
563 os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements),
564 wpabuf_len(hapd->conf->vendor_elements));
565 pos += wpabuf_len(hapd->conf->vendor_elements);
566 }
567
568 *resp_len = pos - (u8 *) resp;
569 return (u8 *) resp;
570 }
571
572
573 enum ssid_match_result {
574 NO_SSID_MATCH,
575 EXACT_SSID_MATCH,
576 WILDCARD_SSID_MATCH
577 };
578
ssid_match(struct hostapd_data * hapd,const u8 * ssid,size_t ssid_len,const u8 * ssid_list,size_t ssid_list_len)579 static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
580 const u8 *ssid, size_t ssid_len,
581 const u8 *ssid_list,
582 size_t ssid_list_len)
583 {
584 const u8 *pos, *end;
585 int wildcard = 0;
586
587 if (ssid_len == 0)
588 wildcard = 1;
589 if (ssid_len == hapd->conf->ssid.ssid_len &&
590 os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0)
591 return EXACT_SSID_MATCH;
592
593 if (ssid_list == NULL)
594 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
595
596 pos = ssid_list;
597 end = ssid_list + ssid_list_len;
598 while (end - pos >= 2) {
599 if (2 + pos[1] > end - pos)
600 break;
601 if (pos[1] == 0)
602 wildcard = 1;
603 if (pos[1] == hapd->conf->ssid.ssid_len &&
604 os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0)
605 return EXACT_SSID_MATCH;
606 pos += 2 + pos[1];
607 }
608
609 return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH;
610 }
611
612
sta_track_expire(struct hostapd_iface * iface,int force)613 void sta_track_expire(struct hostapd_iface *iface, int force)
614 {
615 struct os_reltime now;
616 struct hostapd_sta_info *info;
617
618 if (!iface->num_sta_seen)
619 return;
620
621 os_get_reltime(&now);
622 while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
623 list))) {
624 if (!force &&
625 !os_reltime_expired(&now, &info->last_seen,
626 iface->conf->track_sta_max_age))
627 break;
628 force = 0;
629
630 wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
631 MACSTR, iface->bss[0]->conf->iface,
632 MAC2STR(info->addr));
633 dl_list_del(&info->list);
634 iface->num_sta_seen--;
635 sta_track_del(info);
636 }
637 }
638
639
sta_track_get(struct hostapd_iface * iface,const u8 * addr)640 static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
641 const u8 *addr)
642 {
643 struct hostapd_sta_info *info;
644
645 dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
646 if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
647 return info;
648
649 return NULL;
650 }
651
652
sta_track_add(struct hostapd_iface * iface,const u8 * addr,int ssi_signal)653 void sta_track_add(struct hostapd_iface *iface, const u8 *addr, int ssi_signal)
654 {
655 struct hostapd_sta_info *info;
656
657 info = sta_track_get(iface, addr);
658 if (info) {
659 /* Move the most recent entry to the end of the list */
660 dl_list_del(&info->list);
661 dl_list_add_tail(&iface->sta_seen, &info->list);
662 os_get_reltime(&info->last_seen);
663 info->ssi_signal = ssi_signal;
664 return;
665 }
666
667 /* Add a new entry */
668 info = os_zalloc(sizeof(*info));
669 if (info == NULL)
670 return;
671 os_memcpy(info->addr, addr, ETH_ALEN);
672 os_get_reltime(&info->last_seen);
673 info->ssi_signal = ssi_signal;
674
675 if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
676 /* Expire oldest entry to make room for a new one */
677 sta_track_expire(iface, 1);
678 }
679
680 wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
681 MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
682 dl_list_add_tail(&iface->sta_seen, &info->list);
683 iface->num_sta_seen++;
684 }
685
686
687 struct hostapd_data *
sta_track_seen_on(struct hostapd_iface * iface,const u8 * addr,const char * ifname)688 sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
689 const char *ifname)
690 {
691 struct hapd_interfaces *interfaces = iface->interfaces;
692 size_t i, j;
693
694 for (i = 0; i < interfaces->count; i++) {
695 struct hostapd_data *hapd = NULL;
696
697 iface = interfaces->iface[i];
698 for (j = 0; j < iface->num_bss; j++) {
699 hapd = iface->bss[j];
700 if (os_strcmp(ifname, hapd->conf->iface) == 0)
701 break;
702 hapd = NULL;
703 }
704
705 if (hapd && sta_track_get(iface, addr))
706 return hapd;
707 }
708
709 return NULL;
710 }
711
712
713 #ifdef CONFIG_TAXONOMY
sta_track_claim_taxonomy_info(struct hostapd_iface * iface,const u8 * addr,struct wpabuf ** probe_ie_taxonomy)714 void sta_track_claim_taxonomy_info(struct hostapd_iface *iface, const u8 *addr,
715 struct wpabuf **probe_ie_taxonomy)
716 {
717 struct hostapd_sta_info *info;
718
719 info = sta_track_get(iface, addr);
720 if (!info)
721 return;
722
723 wpabuf_free(*probe_ie_taxonomy);
724 *probe_ie_taxonomy = info->probe_ie_taxonomy;
725 info->probe_ie_taxonomy = NULL;
726 }
727 #endif /* CONFIG_TAXONOMY */
728
729
handle_probe_req(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ssi_signal)730 void handle_probe_req(struct hostapd_data *hapd,
731 const struct ieee80211_mgmt *mgmt, size_t len,
732 int ssi_signal)
733 {
734 u8 *resp;
735 struct ieee802_11_elems elems;
736 const u8 *ie;
737 size_t ie_len;
738 size_t i, resp_len;
739 int noack;
740 enum ssid_match_result res;
741 int ret;
742 u16 csa_offs[2];
743 size_t csa_offs_len;
744 u32 session_timeout, acct_interim_interval;
745 struct vlan_description vlan_id;
746 struct hostapd_sta_wpa_psk_short *psk = NULL;
747 char *identity = NULL;
748 char *radius_cui = NULL;
749
750 if (len < IEEE80211_HDRLEN)
751 return;
752 ie = ((const u8 *) mgmt) + IEEE80211_HDRLEN;
753 if (hapd->iconf->track_sta_max_num)
754 sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
755 ie_len = len - IEEE80211_HDRLEN;
756
757 ret = ieee802_11_allowed_address(hapd, mgmt->sa, (const u8 *) mgmt, len,
758 &session_timeout,
759 &acct_interim_interval, &vlan_id,
760 &psk, &identity, &radius_cui, 1);
761 if (ret == HOSTAPD_ACL_REJECT) {
762 wpa_msg(hapd->msg_ctx, MSG_DEBUG,
763 "Ignore Probe Request frame from " MACSTR
764 " due to ACL reject ", MAC2STR(mgmt->sa));
765 return;
766 }
767
768 for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
769 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
770 mgmt->sa, mgmt->da, mgmt->bssid,
771 ie, ie_len, ssi_signal) > 0)
772 return;
773
774 if (!hapd->conf->send_probe_response)
775 return;
776
777 if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
778 wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
779 MAC2STR(mgmt->sa));
780 return;
781 }
782
783 if ((!elems.ssid || !elems.supp_rates)) {
784 wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
785 "without SSID or supported rates element",
786 MAC2STR(mgmt->sa));
787 return;
788 }
789
790 /*
791 * No need to reply if the Probe Request frame was sent on an adjacent
792 * channel. IEEE Std 802.11-2012 describes this as a requirement for an
793 * AP with dot11RadioMeasurementActivated set to true, but strictly
794 * speaking does not allow such ignoring of Probe Request frames if
795 * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
796 * number of unnecessary Probe Response frames for cases where the STA
797 * is less likely to see them (Probe Request frame sent on a
798 * neighboring, but partially overlapping, channel).
799 */
800 if (elems.ds_params &&
801 hapd->iface->current_mode &&
802 (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
803 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
804 hapd->iconf->channel != elems.ds_params[0]) {
805 wpa_printf(MSG_DEBUG,
806 "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
807 hapd->iconf->channel, elems.ds_params[0]);
808 return;
809 }
810
811 #ifdef CONFIG_P2P
812 if (hapd->p2p && hapd->p2p_group && elems.wps_ie) {
813 struct wpabuf *wps;
814 wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
815 if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
816 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
817 "due to mismatch with Requested Device "
818 "Type");
819 wpabuf_free(wps);
820 return;
821 }
822 wpabuf_free(wps);
823 }
824
825 if (hapd->p2p && hapd->p2p_group && elems.p2p) {
826 struct wpabuf *p2p;
827 p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
828 if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
829 wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
830 "due to mismatch with Device ID");
831 wpabuf_free(p2p);
832 return;
833 }
834 wpabuf_free(p2p);
835 }
836 #endif /* CONFIG_P2P */
837
838 if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 &&
839 elems.ssid_list_len == 0) {
840 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
841 "broadcast SSID ignored", MAC2STR(mgmt->sa));
842 return;
843 }
844
845 #ifdef CONFIG_P2P
846 if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
847 elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
848 os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
849 P2P_WILDCARD_SSID_LEN) == 0) {
850 /* Process P2P Wildcard SSID like Wildcard SSID */
851 elems.ssid_len = 0;
852 }
853 #endif /* CONFIG_P2P */
854
855 #ifdef CONFIG_TAXONOMY
856 {
857 struct sta_info *sta;
858 struct hostapd_sta_info *info;
859
860 if ((sta = ap_get_sta(hapd, mgmt->sa)) != NULL) {
861 taxonomy_sta_info_probe_req(hapd, sta, ie, ie_len);
862 } else if ((info = sta_track_get(hapd->iface,
863 mgmt->sa)) != NULL) {
864 taxonomy_hostapd_sta_info_probe_req(hapd, info,
865 ie, ie_len);
866 }
867 }
868 #endif /* CONFIG_TAXONOMY */
869
870 res = ssid_match(hapd, elems.ssid, elems.ssid_len,
871 elems.ssid_list, elems.ssid_list_len);
872 if (res == NO_SSID_MATCH) {
873 if (!(mgmt->da[0] & 0x01)) {
874 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
875 " for foreign SSID '%s' (DA " MACSTR ")%s",
876 MAC2STR(mgmt->sa),
877 wpa_ssid_txt(elems.ssid, elems.ssid_len),
878 MAC2STR(mgmt->da),
879 elems.ssid_list ? " (SSID list)" : "");
880 }
881 return;
882 }
883
884 #ifdef CONFIG_INTERWORKING
885 if (hapd->conf->interworking &&
886 elems.interworking && elems.interworking_len >= 1) {
887 u8 ant = elems.interworking[0] & 0x0f;
888 if (ant != INTERWORKING_ANT_WILDCARD &&
889 ant != hapd->conf->access_network_type) {
890 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
891 " for mismatching ANT %u ignored",
892 MAC2STR(mgmt->sa), ant);
893 return;
894 }
895 }
896
897 if (hapd->conf->interworking && elems.interworking &&
898 (elems.interworking_len == 7 || elems.interworking_len == 9)) {
899 const u8 *hessid;
900 if (elems.interworking_len == 7)
901 hessid = elems.interworking + 1;
902 else
903 hessid = elems.interworking + 1 + 2;
904 if (!is_broadcast_ether_addr(hessid) &&
905 os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
906 wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
907 " for mismatching HESSID " MACSTR
908 " ignored",
909 MAC2STR(mgmt->sa), MAC2STR(hessid));
910 return;
911 }
912 }
913 #endif /* CONFIG_INTERWORKING */
914
915 #ifdef CONFIG_P2P
916 if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
917 supp_rates_11b_only(&elems)) {
918 /* Indicates support for 11b rates only */
919 wpa_printf(MSG_EXCESSIVE, "P2P: Ignore Probe Request from "
920 MACSTR " with only 802.11b rates",
921 MAC2STR(mgmt->sa));
922 return;
923 }
924 #endif /* CONFIG_P2P */
925
926 /* TODO: verify that supp_rates contains at least one matching rate
927 * with AP configuration */
928
929 if (hapd->conf->no_probe_resp_if_seen_on &&
930 is_multicast_ether_addr(mgmt->da) &&
931 is_multicast_ether_addr(mgmt->bssid) &&
932 sta_track_seen_on(hapd->iface, mgmt->sa,
933 hapd->conf->no_probe_resp_if_seen_on)) {
934 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
935 " since STA has been seen on %s",
936 hapd->conf->iface, MAC2STR(mgmt->sa),
937 hapd->conf->no_probe_resp_if_seen_on);
938 return;
939 }
940
941 if (hapd->conf->no_probe_resp_if_max_sta &&
942 is_multicast_ether_addr(mgmt->da) &&
943 is_multicast_ether_addr(mgmt->bssid) &&
944 hapd->num_sta >= hapd->conf->max_num_sta &&
945 !ap_get_sta(hapd, mgmt->sa)) {
946 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
947 " since no room for additional STA",
948 hapd->conf->iface, MAC2STR(mgmt->sa));
949 return;
950 }
951
952 #ifdef CONFIG_TESTING_OPTIONS
953 if (hapd->iconf->ignore_probe_probability > 0.0 &&
954 drand48() < hapd->iconf->ignore_probe_probability) {
955 wpa_printf(MSG_INFO,
956 "TESTING: ignoring probe request from " MACSTR,
957 MAC2STR(mgmt->sa));
958 return;
959 }
960 #endif /* CONFIG_TESTING_OPTIONS */
961
962 wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, RX_PROBE_REQUEST "sa=" MACSTR
963 " signal=%d", MAC2STR(mgmt->sa), ssi_signal);
964
965 resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
966 &resp_len);
967 if (resp == NULL)
968 return;
969
970 /*
971 * If this is a broadcast probe request, apply no ack policy to avoid
972 * excessive retries.
973 */
974 noack = !!(res == WILDCARD_SSID_MATCH &&
975 is_broadcast_ether_addr(mgmt->da));
976
977 csa_offs_len = 0;
978 if (hapd->csa_in_progress) {
979 if (hapd->cs_c_off_proberesp)
980 csa_offs[csa_offs_len++] =
981 hapd->cs_c_off_proberesp;
982
983 if (hapd->cs_c_off_ecsa_proberesp)
984 csa_offs[csa_offs_len++] =
985 hapd->cs_c_off_ecsa_proberesp;
986 }
987
988 ret = hostapd_drv_send_mlme_csa(hapd, resp, resp_len, noack,
989 csa_offs_len ? csa_offs : NULL,
990 csa_offs_len);
991
992 if (ret < 0)
993 wpa_printf(MSG_INFO, "handle_probe_req: send failed");
994
995 os_free(resp);
996
997 wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
998 "SSID", MAC2STR(mgmt->sa),
999 elems.ssid_len == 0 ? "broadcast" : "our");
1000 }
1001
1002
hostapd_probe_resp_offloads(struct hostapd_data * hapd,size_t * resp_len)1003 static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
1004 size_t *resp_len)
1005 {
1006 /* check probe response offloading caps and print warnings */
1007 if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
1008 return NULL;
1009
1010 #ifdef CONFIG_WPS
1011 if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
1012 (!(hapd->iface->probe_resp_offloads &
1013 (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
1014 WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
1015 wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
1016 "Probe Response while not supporting this");
1017 #endif /* CONFIG_WPS */
1018
1019 #ifdef CONFIG_P2P
1020 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
1021 !(hapd->iface->probe_resp_offloads &
1022 WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
1023 wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
1024 "Probe Response while not supporting this");
1025 #endif /* CONFIG_P2P */
1026
1027 if (hapd->conf->interworking &&
1028 !(hapd->iface->probe_resp_offloads &
1029 WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
1030 wpa_printf(MSG_WARNING, "Device is trying to offload "
1031 "Interworking Probe Response while not supporting "
1032 "this");
1033
1034 /* Generate a Probe Response template for the non-P2P case */
1035 return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
1036 }
1037
1038 #endif /* NEED_AP_MLME */
1039
1040
sta_track_del(struct hostapd_sta_info * info)1041 void sta_track_del(struct hostapd_sta_info *info)
1042 {
1043 #ifdef CONFIG_TAXONOMY
1044 wpabuf_free(info->probe_ie_taxonomy);
1045 info->probe_ie_taxonomy = NULL;
1046 #endif /* CONFIG_TAXONOMY */
1047 os_free(info);
1048 }
1049
1050
ieee802_11_build_ap_params(struct hostapd_data * hapd,struct wpa_driver_ap_params * params)1051 int ieee802_11_build_ap_params(struct hostapd_data *hapd,
1052 struct wpa_driver_ap_params *params)
1053 {
1054 struct ieee80211_mgmt *head = NULL;
1055 u8 *tail = NULL;
1056 size_t head_len = 0, tail_len = 0;
1057 u8 *resp = NULL;
1058 size_t resp_len = 0;
1059 #ifdef NEED_AP_MLME
1060 u16 capab_info;
1061 u8 *pos, *tailpos, *csa_pos;
1062
1063 #define BEACON_HEAD_BUF_SIZE 256
1064 #define BEACON_TAIL_BUF_SIZE 512
1065 head = os_zalloc(BEACON_HEAD_BUF_SIZE);
1066 tail_len = BEACON_TAIL_BUF_SIZE;
1067 #ifdef CONFIG_WPS
1068 if (hapd->conf->wps_state && hapd->wps_beacon_ie)
1069 tail_len += wpabuf_len(hapd->wps_beacon_ie);
1070 #endif /* CONFIG_WPS */
1071 #ifdef CONFIG_P2P
1072 if (hapd->p2p_beacon_ie)
1073 tail_len += wpabuf_len(hapd->p2p_beacon_ie);
1074 #endif /* CONFIG_P2P */
1075 #ifdef CONFIG_FST
1076 if (hapd->iface->fst_ies)
1077 tail_len += wpabuf_len(hapd->iface->fst_ies);
1078 #endif /* CONFIG_FST */
1079 if (hapd->conf->vendor_elements)
1080 tail_len += wpabuf_len(hapd->conf->vendor_elements);
1081
1082 #ifdef CONFIG_IEEE80211AC
1083 if (hapd->conf->vendor_vht) {
1084 tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
1085 2 + sizeof(struct ieee80211_vht_operation);
1086 }
1087 #endif /* CONFIG_IEEE80211AC */
1088
1089 #ifdef CONFIG_IEEE80211AX
1090 if (hapd->iconf->ieee80211ax) {
1091 tail_len += 3 + sizeof(struct ieee80211_he_capabilities) +
1092 3 + sizeof(struct ieee80211_he_operation) +
1093 3 + sizeof(struct ieee80211_he_mu_edca_parameter_set) +
1094 3 + sizeof(struct ieee80211_spatial_reuse);
1095 }
1096 #endif /* CONFIG_IEEE80211AX */
1097
1098 tail_len += hostapd_mbo_ie_len(hapd);
1099 tail_len += hostapd_eid_owe_trans_len(hapd);
1100
1101 tailpos = tail = os_malloc(tail_len);
1102 if (head == NULL || tail == NULL) {
1103 wpa_printf(MSG_ERROR, "Failed to set beacon data");
1104 os_free(head);
1105 os_free(tail);
1106 return -1;
1107 }
1108
1109 head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1110 WLAN_FC_STYPE_BEACON);
1111 head->duration = host_to_le16(0);
1112 os_memset(head->da, 0xff, ETH_ALEN);
1113
1114 os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
1115 os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
1116 head->u.beacon.beacon_int =
1117 host_to_le16(hapd->iconf->beacon_int);
1118
1119 /* hardware or low-level driver will setup seq_ctrl and timestamp */
1120 capab_info = hostapd_own_capab_info(hapd);
1121 head->u.beacon.capab_info = host_to_le16(capab_info);
1122 pos = &head->u.beacon.variable[0];
1123
1124 /* SSID */
1125 *pos++ = WLAN_EID_SSID;
1126 if (hapd->conf->ignore_broadcast_ssid == 2) {
1127 /* clear the data, but keep the correct length of the SSID */
1128 *pos++ = hapd->conf->ssid.ssid_len;
1129 os_memset(pos, 0, hapd->conf->ssid.ssid_len);
1130 pos += hapd->conf->ssid.ssid_len;
1131 } else if (hapd->conf->ignore_broadcast_ssid) {
1132 *pos++ = 0; /* empty SSID */
1133 } else {
1134 *pos++ = hapd->conf->ssid.ssid_len;
1135 os_memcpy(pos, hapd->conf->ssid.ssid,
1136 hapd->conf->ssid.ssid_len);
1137 pos += hapd->conf->ssid.ssid_len;
1138 }
1139
1140 /* Supported rates */
1141 pos = hostapd_eid_supp_rates(hapd, pos);
1142
1143 /* DS Params */
1144 pos = hostapd_eid_ds_params(hapd, pos);
1145
1146 head_len = pos - (u8 *) head;
1147
1148 tailpos = hostapd_eid_country(hapd, tailpos,
1149 tail + BEACON_TAIL_BUF_SIZE - tailpos);
1150
1151 /* Power Constraint element */
1152 tailpos = hostapd_eid_pwr_constraint(hapd, tailpos);
1153
1154 /* CSA IE */
1155 csa_pos = hostapd_eid_csa(hapd, tailpos);
1156 if (csa_pos != tailpos)
1157 hapd->cs_c_off_beacon = csa_pos - tail - 1;
1158 tailpos = csa_pos;
1159
1160 /* ERP Information element */
1161 tailpos = hostapd_eid_erp_info(hapd, tailpos);
1162
1163 /* Extended supported rates */
1164 tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
1165
1166 /* RSN, MDIE */
1167 if (hapd->conf->wpa != WPA_PROTO_WPA)
1168 tailpos = hostapd_eid_wpa(hapd, tailpos,
1169 tail + BEACON_TAIL_BUF_SIZE -
1170 tailpos);
1171
1172 tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
1173 tail + BEACON_TAIL_BUF_SIZE -
1174 tailpos);
1175
1176 tailpos = hostapd_eid_bss_load(hapd, tailpos,
1177 tail + BEACON_TAIL_BUF_SIZE - tailpos);
1178
1179 /* eCSA IE */
1180 csa_pos = hostapd_eid_ecsa(hapd, tailpos);
1181 if (csa_pos != tailpos)
1182 hapd->cs_c_off_ecsa_beacon = csa_pos - tail - 1;
1183 tailpos = csa_pos;
1184
1185 tailpos = hostapd_eid_supported_op_classes(hapd, tailpos);
1186
1187 #ifdef CONFIG_IEEE80211N
1188 /* Secondary Channel Offset element */
1189 /* TODO: The standard doesn't specify a position for this element. */
1190 tailpos = hostapd_eid_secondary_channel(hapd, tailpos);
1191
1192 tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
1193 tailpos = hostapd_eid_ht_operation(hapd, tailpos);
1194 #endif /* CONFIG_IEEE80211N */
1195
1196 tailpos = hostapd_eid_ext_capab(hapd, tailpos);
1197
1198 /*
1199 * TODO: Time Advertisement element should only be included in some
1200 * DTIM Beacon frames.
1201 */
1202 tailpos = hostapd_eid_time_adv(hapd, tailpos);
1203
1204 tailpos = hostapd_eid_interworking(hapd, tailpos);
1205 tailpos = hostapd_eid_adv_proto(hapd, tailpos);
1206 tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
1207
1208 #ifdef CONFIG_FST
1209 if (hapd->iface->fst_ies) {
1210 os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
1211 wpabuf_len(hapd->iface->fst_ies));
1212 tailpos += wpabuf_len(hapd->iface->fst_ies);
1213 }
1214 #endif /* CONFIG_FST */
1215
1216 #ifdef CONFIG_IEEE80211AC
1217 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1218 tailpos = hostapd_eid_vht_capabilities(hapd, tailpos, 0);
1219 tailpos = hostapd_eid_vht_operation(hapd, tailpos);
1220 tailpos = hostapd_eid_txpower_envelope(hapd, tailpos);
1221 tailpos = hostapd_eid_wb_chsw_wrapper(hapd, tailpos);
1222 }
1223 #endif /* CONFIG_IEEE80211AC */
1224
1225 tailpos = hostapd_eid_fils_indic(hapd, tailpos, 0);
1226
1227 #ifdef CONFIG_IEEE80211AX
1228 if (hapd->iconf->ieee80211ax) {
1229 tailpos = hostapd_eid_he_capab(hapd, tailpos,
1230 IEEE80211_MODE_AP);
1231 tailpos = hostapd_eid_he_operation(hapd, tailpos);
1232 tailpos = hostapd_eid_he_mu_edca_parameter_set(hapd, tailpos);
1233 tailpos = hostapd_eid_spatial_reuse(hapd, tailpos);
1234 }
1235 #endif /* CONFIG_IEEE80211AX */
1236
1237 #ifdef CONFIG_IEEE80211AC
1238 if (hapd->conf->vendor_vht)
1239 tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
1240 #endif /* CONFIG_IEEE80211AC */
1241
1242 /* WPA */
1243 if (hapd->conf->wpa == WPA_PROTO_WPA)
1244 tailpos = hostapd_eid_wpa(hapd, tailpos,
1245 tail + BEACON_TAIL_BUF_SIZE -
1246 tailpos);
1247
1248 /* Wi-Fi Alliance WMM */
1249 tailpos = hostapd_eid_wmm(hapd, tailpos);
1250
1251 #ifdef CONFIG_WPS
1252 if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
1253 os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
1254 wpabuf_len(hapd->wps_beacon_ie));
1255 tailpos += wpabuf_len(hapd->wps_beacon_ie);
1256 }
1257 #endif /* CONFIG_WPS */
1258
1259 #ifdef CONFIG_P2P
1260 if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
1261 os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
1262 wpabuf_len(hapd->p2p_beacon_ie));
1263 tailpos += wpabuf_len(hapd->p2p_beacon_ie);
1264 }
1265 #endif /* CONFIG_P2P */
1266 #ifdef CONFIG_P2P_MANAGER
1267 if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
1268 P2P_MANAGE)
1269 tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
1270 #endif /* CONFIG_P2P_MANAGER */
1271
1272 #ifdef CONFIG_HS20
1273 tailpos = hostapd_eid_hs20_indication(hapd, tailpos);
1274 tailpos = hostapd_eid_osen(hapd, tailpos);
1275 #endif /* CONFIG_HS20 */
1276
1277 tailpos = hostapd_eid_mbo(hapd, tailpos, tail + tail_len - tailpos);
1278 tailpos = hostapd_eid_owe_trans(hapd, tailpos,
1279 tail + tail_len - tailpos);
1280
1281 if (hapd->conf->vendor_elements) {
1282 os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements),
1283 wpabuf_len(hapd->conf->vendor_elements));
1284 tailpos += wpabuf_len(hapd->conf->vendor_elements);
1285 }
1286
1287 tail_len = tailpos > tail ? tailpos - tail : 0;
1288
1289 resp = hostapd_probe_resp_offloads(hapd, &resp_len);
1290 #endif /* NEED_AP_MLME */
1291
1292 os_memset(params, 0, sizeof(*params));
1293 params->head = (u8 *) head;
1294 params->head_len = head_len;
1295 params->tail = tail;
1296 params->tail_len = tail_len;
1297 params->proberesp = resp;
1298 params->proberesp_len = resp_len;
1299 params->dtim_period = hapd->conf->dtim_period;
1300 params->beacon_int = hapd->iconf->beacon_int;
1301 params->basic_rates = hapd->iface->basic_rates;
1302 params->beacon_rate = hapd->iconf->beacon_rate;
1303 params->rate_type = hapd->iconf->rate_type;
1304 params->ssid = hapd->conf->ssid.ssid;
1305 params->ssid_len = hapd->conf->ssid.ssid_len;
1306 if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
1307 (WPA_PROTO_WPA | WPA_PROTO_RSN))
1308 params->pairwise_ciphers = hapd->conf->wpa_pairwise |
1309 hapd->conf->rsn_pairwise;
1310 else if (hapd->conf->wpa & WPA_PROTO_RSN)
1311 params->pairwise_ciphers = hapd->conf->rsn_pairwise;
1312 else if (hapd->conf->wpa & WPA_PROTO_WPA)
1313 params->pairwise_ciphers = hapd->conf->wpa_pairwise;
1314 params->group_cipher = hapd->conf->wpa_group;
1315 params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
1316 params->auth_algs = hapd->conf->auth_algs;
1317 params->wpa_version = hapd->conf->wpa;
1318 params->privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
1319 (hapd->conf->ieee802_1x &&
1320 (hapd->conf->default_wep_key_len ||
1321 hapd->conf->individual_wep_key_len));
1322 switch (hapd->conf->ignore_broadcast_ssid) {
1323 case 0:
1324 params->hide_ssid = NO_SSID_HIDING;
1325 break;
1326 case 1:
1327 params->hide_ssid = HIDDEN_SSID_ZERO_LEN;
1328 break;
1329 case 2:
1330 params->hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
1331 break;
1332 }
1333 params->isolate = hapd->conf->isolate;
1334 params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
1335 #ifdef NEED_AP_MLME
1336 params->cts_protect = !!(ieee802_11_erp_info(hapd) &
1337 ERP_INFO_USE_PROTECTION);
1338 params->preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
1339 hapd->iconf->preamble == SHORT_PREAMBLE;
1340 if (hapd->iface->current_mode &&
1341 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1342 params->short_slot_time =
1343 hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
1344 else
1345 params->short_slot_time = -1;
1346 if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
1347 params->ht_opmode = -1;
1348 else
1349 params->ht_opmode = hapd->iface->ht_op_mode;
1350 #endif /* NEED_AP_MLME */
1351 params->interworking = hapd->conf->interworking;
1352 if (hapd->conf->interworking &&
1353 !is_zero_ether_addr(hapd->conf->hessid))
1354 params->hessid = hapd->conf->hessid;
1355 params->access_network_type = hapd->conf->access_network_type;
1356 params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
1357 #ifdef CONFIG_P2P
1358 params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
1359 #endif /* CONFIG_P2P */
1360 #ifdef CONFIG_HS20
1361 params->disable_dgaf = hapd->conf->disable_dgaf;
1362 if (hapd->conf->osen) {
1363 params->privacy = 1;
1364 params->osen = 1;
1365 }
1366 #endif /* CONFIG_HS20 */
1367 params->multicast_to_unicast = hapd->conf->multicast_to_unicast;
1368 params->pbss = hapd->conf->pbss;
1369
1370 if (hapd->conf->ftm_responder) {
1371 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_FTM_RESPONDER) {
1372 params->ftm_responder = 1;
1373 params->lci = hapd->iface->conf->lci;
1374 params->civic = hapd->iface->conf->civic;
1375 } else {
1376 wpa_printf(MSG_WARNING,
1377 "Not configuring FTM responder as the driver doesn't advertise support for it");
1378 }
1379 }
1380
1381 return 0;
1382 }
1383
1384
ieee802_11_free_ap_params(struct wpa_driver_ap_params * params)1385 void ieee802_11_free_ap_params(struct wpa_driver_ap_params *params)
1386 {
1387 os_free(params->tail);
1388 params->tail = NULL;
1389 os_free(params->head);
1390 params->head = NULL;
1391 os_free(params->proberesp);
1392 params->proberesp = NULL;
1393 }
1394
1395
ieee802_11_set_beacon(struct hostapd_data * hapd)1396 int ieee802_11_set_beacon(struct hostapd_data *hapd)
1397 {
1398 struct wpa_driver_ap_params params;
1399 struct hostapd_freq_params freq;
1400 struct hostapd_iface *iface = hapd->iface;
1401 struct hostapd_config *iconf = iface->conf;
1402 struct hostapd_hw_modes *cmode = iface->current_mode;
1403 struct wpabuf *beacon, *proberesp, *assocresp;
1404 int res, ret = -1;
1405
1406 if (hapd->csa_in_progress) {
1407 wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
1408 return -1;
1409 }
1410
1411 hapd->beacon_set_done = 1;
1412
1413 if (ieee802_11_build_ap_params(hapd, ¶ms) < 0)
1414 return -1;
1415
1416 if (hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp) <
1417 0)
1418 goto fail;
1419
1420 params.beacon_ies = beacon;
1421 params.proberesp_ies = proberesp;
1422 params.assocresp_ies = assocresp;
1423 params.reenable = hapd->reenable_beacon;
1424 hapd->reenable_beacon = 0;
1425
1426 if (cmode &&
1427 hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,
1428 iconf->channel, iconf->ieee80211n,
1429 iconf->ieee80211ac, iconf->ieee80211ax,
1430 iconf->secondary_channel,
1431 hostapd_get_oper_chwidth(iconf),
1432 hostapd_get_oper_centr_freq_seg0_idx(iconf),
1433 hostapd_get_oper_centr_freq_seg1_idx(iconf),
1434 cmode->vht_capab,
1435 &cmode->he_capab[IEEE80211_MODE_AP]) == 0)
1436 params.freq = &freq;
1437
1438 res = hostapd_drv_set_ap(hapd, ¶ms);
1439 hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
1440 if (res)
1441 wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
1442 else
1443 ret = 0;
1444 fail:
1445 ieee802_11_free_ap_params(¶ms);
1446 return ret;
1447 }
1448
1449
ieee802_11_set_beacons(struct hostapd_iface * iface)1450 int ieee802_11_set_beacons(struct hostapd_iface *iface)
1451 {
1452 size_t i;
1453 int ret = 0;
1454
1455 for (i = 0; i < iface->num_bss; i++) {
1456 if (iface->bss[i]->started &&
1457 ieee802_11_set_beacon(iface->bss[i]) < 0)
1458 ret = -1;
1459 }
1460
1461 return ret;
1462 }
1463
1464
1465 /* only update beacons if started */
ieee802_11_update_beacons(struct hostapd_iface * iface)1466 int ieee802_11_update_beacons(struct hostapd_iface *iface)
1467 {
1468 size_t i;
1469 int ret = 0;
1470
1471 for (i = 0; i < iface->num_bss; i++) {
1472 if (iface->bss[i]->beacon_set_done && iface->bss[i]->started &&
1473 ieee802_11_set_beacon(iface->bss[i]) < 0)
1474 ret = -1;
1475 }
1476
1477 return ret;
1478 }
1479
1480 #endif /* CONFIG_NATIVE_WINDOWS */
1481