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UBSan: Avoid unnecessary warning
[thirdparty/hostap.git] / wpa_supplicant / wnm_sta.c
1 /*
2 * wpa_supplicant - WNM
3 * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "common/ieee802_11_defs.h"
13 #include "common/ieee802_11_common.h"
14 #include "common/wpa_ctrl.h"
15 #include "common/ocv.h"
16 #include "rsn_supp/wpa.h"
17 #include "config.h"
18 #include "wpa_supplicant_i.h"
19 #include "driver_i.h"
20 #include "scan.h"
21 #include "ctrl_iface.h"
22 #include "bss.h"
23 #include "wnm_sta.h"
24 #include "notify.h"
25 #include "hs20_supplicant.h"
26
27 #define MAX_TFS_IE_LEN 1024
28 #define WNM_MAX_NEIGHBOR_REPORT 10
29
30 #define WNM_SCAN_RESULT_AGE 2 /* 2 seconds */
31
32 /* get the TFS IE from driver */
33 static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
34 u16 *buf_len, enum wnm_oper oper)
35 {
36 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
37
38 return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
39 }
40
41
42 /* set the TFS IE to driver */
43 static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
44 const u8 *addr, const u8 *buf, u16 buf_len,
45 enum wnm_oper oper)
46 {
47 u16 len = buf_len;
48
49 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
50
51 return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
52 }
53
54
55 /* MLME-SLEEPMODE.request */
56 int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
57 u8 action, u16 intval, struct wpabuf *tfs_req)
58 {
59 struct ieee80211_mgmt *mgmt;
60 int res;
61 size_t len;
62 struct wnm_sleep_element *wnmsleep_ie;
63 u8 *wnmtfs_ie, *oci_ie;
64 u8 wnmsleep_ie_len, oci_ie_len;
65 u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
66 enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
67 WNM_SLEEP_TFS_REQ_IE_NONE;
68
69 wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
70 "action=%s to " MACSTR,
71 action == 0 ? "enter" : "exit",
72 MAC2STR(wpa_s->bssid));
73
74 /* WNM-Sleep Mode IE */
75 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
76 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
77 if (wnmsleep_ie == NULL)
78 return -1;
79 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
80 wnmsleep_ie->len = wnmsleep_ie_len - 2;
81 wnmsleep_ie->action_type = action;
82 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
83 wnmsleep_ie->intval = host_to_le16(intval);
84 wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
85 (u8 *) wnmsleep_ie, wnmsleep_ie_len);
86
87 /* TFS IE(s) */
88 if (tfs_req) {
89 wnmtfs_ie_len = wpabuf_len(tfs_req);
90 wnmtfs_ie = os_memdup(wpabuf_head(tfs_req), wnmtfs_ie_len);
91 if (wnmtfs_ie == NULL) {
92 os_free(wnmsleep_ie);
93 return -1;
94 }
95 } else {
96 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
97 if (wnmtfs_ie == NULL) {
98 os_free(wnmsleep_ie);
99 return -1;
100 }
101 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
102 tfs_oper)) {
103 wnmtfs_ie_len = 0;
104 os_free(wnmtfs_ie);
105 wnmtfs_ie = NULL;
106 }
107 }
108 wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
109 (u8 *) wnmtfs_ie, wnmtfs_ie_len);
110
111 oci_ie = NULL;
112 oci_ie_len = 0;
113 #ifdef CONFIG_OCV
114 if (action == WNM_SLEEP_MODE_EXIT && wpa_sm_ocv_enabled(wpa_s->wpa)) {
115 struct wpa_channel_info ci;
116
117 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
118 wpa_printf(MSG_WARNING,
119 "Failed to get channel info for OCI element in WNM-Sleep Mode frame");
120 os_free(wnmsleep_ie);
121 os_free(wnmtfs_ie);
122 return -1;
123 }
124
125 oci_ie_len = OCV_OCI_EXTENDED_LEN;
126 oci_ie = os_zalloc(oci_ie_len);
127 if (!oci_ie) {
128 wpa_printf(MSG_WARNING,
129 "Failed to allocate buffer for for OCI element in WNM-Sleep Mode frame");
130 os_free(wnmsleep_ie);
131 os_free(wnmtfs_ie);
132 return -1;
133 }
134
135 if (ocv_insert_extended_oci(&ci, oci_ie) < 0) {
136 os_free(wnmsleep_ie);
137 os_free(wnmtfs_ie);
138 os_free(oci_ie);
139 return -1;
140 }
141 }
142 #endif /* CONFIG_OCV */
143
144 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len +
145 oci_ie_len);
146 if (mgmt == NULL) {
147 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
148 "WNM-Sleep Request action frame");
149 os_free(wnmsleep_ie);
150 os_free(wnmtfs_ie);
151 return -1;
152 }
153
154 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
155 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
156 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
157 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
158 WLAN_FC_STYPE_ACTION);
159 mgmt->u.action.category = WLAN_ACTION_WNM;
160 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
161 mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
162 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
163 wnmsleep_ie_len);
164 /* copy TFS IE here */
165 if (wnmtfs_ie_len > 0) {
166 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
167 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
168 }
169
170 #ifdef CONFIG_OCV
171 /* copy OCV OCI here */
172 if (oci_ie_len > 0) {
173 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
174 wnmsleep_ie_len + wnmtfs_ie_len, oci_ie, oci_ie_len);
175 }
176 #endif /* CONFIG_OCV */
177
178 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
179 wnmtfs_ie_len + oci_ie_len;
180
181 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
182 wpa_s->own_addr, wpa_s->bssid,
183 &mgmt->u.action.category, len, 0);
184 if (res < 0)
185 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
186 "(action=%d, intval=%d)", action, intval);
187 else
188 wpa_s->wnmsleep_used = 1;
189
190 os_free(wnmsleep_ie);
191 os_free(wnmtfs_ie);
192 os_free(oci_ie);
193 os_free(mgmt);
194
195 return res;
196 }
197
198
199 static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
200 const u8 *tfsresp_ie_start,
201 const u8 *tfsresp_ie_end)
202 {
203 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
204 wpa_s->bssid, NULL, NULL);
205 /* remove GTK/IGTK ?? */
206
207 /* set the TFS Resp IE(s) */
208 if (tfsresp_ie_start && tfsresp_ie_end &&
209 tfsresp_ie_end - tfsresp_ie_start >= 0) {
210 u16 tfsresp_ie_len;
211 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
212 tfsresp_ie_start;
213 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
214 /* pass the TFS Resp IE(s) to driver for processing */
215 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
216 tfsresp_ie_start,
217 tfsresp_ie_len,
218 WNM_SLEEP_TFS_RESP_IE_SET))
219 wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
220 }
221 }
222
223
224 static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
225 const u8 *frm, u16 key_len_total)
226 {
227 u8 *ptr, *end;
228 u8 gtk_len;
229
230 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
231 NULL, NULL);
232
233 /* Install GTK/IGTK */
234
235 /* point to key data field */
236 ptr = (u8 *) frm + 1 + 2;
237 end = ptr + key_len_total;
238 wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
239
240 if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
241 wpa_msg(wpa_s, MSG_INFO,
242 "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
243 return;
244 }
245
246 while (end - ptr > 1) {
247 if (2 + ptr[1] > end - ptr) {
248 wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
249 "length");
250 if (end > ptr) {
251 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
252 ptr, end - ptr);
253 }
254 break;
255 }
256 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
257 if (ptr[1] < 11 + 5) {
258 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
259 "subelem");
260 break;
261 }
262 gtk_len = *(ptr + 4);
263 if (ptr[1] < 11 + gtk_len ||
264 gtk_len < 5 || gtk_len > 32) {
265 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
266 "subelem");
267 break;
268 }
269 wpa_wnmsleep_install_key(
270 wpa_s->wpa,
271 WNM_SLEEP_SUBELEM_GTK,
272 ptr);
273 ptr += 13 + gtk_len;
274 #ifdef CONFIG_IEEE80211W
275 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
276 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
277 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
278 "subelem");
279 break;
280 }
281 wpa_wnmsleep_install_key(wpa_s->wpa,
282 WNM_SLEEP_SUBELEM_IGTK, ptr);
283 ptr += 10 + WPA_IGTK_LEN;
284 #endif /* CONFIG_IEEE80211W */
285 } else
286 break; /* skip the loop */
287 }
288 }
289
290
291 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
292 const u8 *frm, int len)
293 {
294 /*
295 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
296 * WNM-Sleep Mode IE | TFS Response IE
297 */
298 const u8 *pos = frm; /* point to payload after the action field */
299 u16 key_len_total;
300 struct wnm_sleep_element *wnmsleep_ie = NULL;
301 /* multiple TFS Resp IE (assuming consecutive) */
302 const u8 *tfsresp_ie_start = NULL;
303 const u8 *tfsresp_ie_end = NULL;
304 #ifdef CONFIG_OCV
305 const u8 *oci_ie = NULL;
306 u8 oci_ie_len = 0;
307 #endif /* CONFIG_OCV */
308 size_t left;
309
310 if (!wpa_s->wnmsleep_used) {
311 wpa_printf(MSG_DEBUG,
312 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode operation has not been requested");
313 return;
314 }
315
316 if (len < 3)
317 return;
318 key_len_total = WPA_GET_LE16(frm + 1);
319
320 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
321 frm[0], key_len_total);
322 left = len - 3;
323 if (key_len_total > left) {
324 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
325 return;
326 }
327 pos += 3 + key_len_total;
328 while (pos - frm + 1 < len) {
329 u8 ie_len = *(pos + 1);
330 if (2 + ie_len > frm + len - pos) {
331 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
332 break;
333 }
334 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
335 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
336 wnmsleep_ie = (struct wnm_sleep_element *) pos;
337 else if (*pos == WLAN_EID_TFS_RESP) {
338 if (!tfsresp_ie_start)
339 tfsresp_ie_start = pos;
340 tfsresp_ie_end = pos;
341 #ifdef CONFIG_OCV
342 } else if (*pos == WLAN_EID_EXTENSION && ie_len >= 1 &&
343 pos[2] == WLAN_EID_EXT_OCV_OCI) {
344 oci_ie = pos + 3;
345 oci_ie_len = ie_len - 1;
346 #endif /* CONFIG_OCV */
347 } else
348 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
349 pos += ie_len + 2;
350 }
351
352 if (!wnmsleep_ie) {
353 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
354 return;
355 }
356
357 #ifdef CONFIG_OCV
358 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT &&
359 wpa_sm_ocv_enabled(wpa_s->wpa)) {
360 struct wpa_channel_info ci;
361
362 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
363 wpa_msg(wpa_s, MSG_WARNING,
364 "Failed to get channel info to validate received OCI in WNM-Sleep Mode frame");
365 return;
366 }
367
368 if (ocv_verify_tx_params(oci_ie, oci_ie_len, &ci,
369 channel_width_to_int(ci.chanwidth),
370 ci.seg1_idx) != 0) {
371 wpa_msg(wpa_s, MSG_WARNING, "WNM: %s", ocv_errorstr);
372 return;
373 }
374 }
375 #endif /* CONFIG_OCV */
376
377 wpa_s->wnmsleep_used = 0;
378
379 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
380 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
381 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
382 "frame (action=%d, intval=%d)",
383 wnmsleep_ie->action_type, wnmsleep_ie->intval);
384 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
385 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
386 tfsresp_ie_end);
387 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
388 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
389 }
390 } else {
391 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
392 "(action=%d, intval=%d)",
393 wnmsleep_ie->action_type, wnmsleep_ie->intval);
394 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
395 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
396 wpa_s->bssid, NULL, NULL);
397 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
398 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
399 wpa_s->bssid, NULL, NULL);
400 }
401 }
402
403
404 void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
405 {
406 int i;
407
408 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
409 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
410 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
411 }
412
413 wpa_s->wnm_num_neighbor_report = 0;
414 os_free(wpa_s->wnm_neighbor_report_elements);
415 wpa_s->wnm_neighbor_report_elements = NULL;
416
417 wpabuf_free(wpa_s->coloc_intf_elems);
418 wpa_s->coloc_intf_elems = NULL;
419 }
420
421
422 static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
423 u8 id, u8 elen, const u8 *pos)
424 {
425 switch (id) {
426 case WNM_NEIGHBOR_TSF:
427 if (elen < 2 + 2) {
428 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
429 break;
430 }
431 rep->tsf_offset = WPA_GET_LE16(pos);
432 rep->beacon_int = WPA_GET_LE16(pos + 2);
433 rep->tsf_present = 1;
434 break;
435 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
436 if (elen < 2) {
437 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
438 "country string");
439 break;
440 }
441 os_memcpy(rep->country, pos, 2);
442 rep->country_present = 1;
443 break;
444 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
445 if (elen < 1) {
446 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
447 "candidate");
448 break;
449 }
450 rep->preference = pos[0];
451 rep->preference_present = 1;
452 break;
453 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
454 rep->bss_term_tsf = WPA_GET_LE64(pos);
455 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
456 rep->bss_term_present = 1;
457 break;
458 case WNM_NEIGHBOR_BEARING:
459 if (elen < 8) {
460 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
461 "bearing");
462 break;
463 }
464 rep->bearing = WPA_GET_LE16(pos);
465 rep->distance = WPA_GET_LE32(pos + 2);
466 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
467 rep->bearing_present = 1;
468 break;
469 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
470 if (elen < 1) {
471 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
472 "pilot");
473 break;
474 }
475 os_free(rep->meas_pilot);
476 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
477 if (rep->meas_pilot == NULL)
478 break;
479 rep->meas_pilot->measurement_pilot = pos[0];
480 rep->meas_pilot->subelem_len = elen - 1;
481 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
482 break;
483 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
484 if (elen < 5) {
485 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
486 "capabilities");
487 break;
488 }
489 os_memcpy(rep->rm_capab, pos, 5);
490 rep->rm_capab_present = 1;
491 break;
492 case WNM_NEIGHBOR_MULTIPLE_BSSID:
493 if (elen < 1) {
494 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
495 break;
496 }
497 os_free(rep->mul_bssid);
498 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
499 if (rep->mul_bssid == NULL)
500 break;
501 rep->mul_bssid->max_bssid_indicator = pos[0];
502 rep->mul_bssid->subelem_len = elen - 1;
503 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
504 break;
505 }
506 }
507
508
509 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
510 {
511 struct wpa_bss *bss = wpa_s->current_bss;
512 const char *country = NULL;
513 int freq;
514
515 if (bss) {
516 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
517
518 if (elem && elem[1] >= 2)
519 country = (const char *) (elem + 2);
520 }
521
522 freq = ieee80211_chan_to_freq(country, op_class, chan);
523 if (freq <= 0 && op_class == 0) {
524 /*
525 * Some APs do not advertise correct operating class
526 * information. Try to determine the most likely operating
527 * frequency based on the channel number.
528 */
529 if (chan >= 1 && chan <= 13)
530 freq = 2407 + chan * 5;
531 else if (chan == 14)
532 freq = 2484;
533 else if (chan >= 36 && chan <= 169)
534 freq = 5000 + chan * 5;
535 }
536 return freq;
537 }
538
539
540 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
541 const u8 *pos, u8 len,
542 struct neighbor_report *rep)
543 {
544 u8 left = len;
545
546 if (left < 13) {
547 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
548 return;
549 }
550
551 os_memcpy(rep->bssid, pos, ETH_ALEN);
552 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
553 rep->regulatory_class = *(pos + 10);
554 rep->channel_number = *(pos + 11);
555 rep->phy_type = *(pos + 12);
556
557 pos += 13;
558 left -= 13;
559
560 while (left >= 2) {
561 u8 id, elen;
562
563 id = *pos++;
564 elen = *pos++;
565 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
566 left -= 2;
567 if (elen > left) {
568 wpa_printf(MSG_DEBUG,
569 "WNM: Truncated neighbor report subelement");
570 break;
571 }
572 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
573 left -= elen;
574 pos += elen;
575 }
576
577 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
578 rep->channel_number);
579 }
580
581
582 static void wnm_clear_acceptable(struct wpa_supplicant *wpa_s)
583 {
584 unsigned int i;
585
586 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++)
587 wpa_s->wnm_neighbor_report_elements[i].acceptable = 0;
588 }
589
590
591 static struct wpa_bss * get_first_acceptable(struct wpa_supplicant *wpa_s)
592 {
593 unsigned int i;
594 struct neighbor_report *nei;
595
596 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
597 nei = &wpa_s->wnm_neighbor_report_elements[i];
598 if (nei->acceptable)
599 return wpa_bss_get_bssid(wpa_s, nei->bssid);
600 }
601
602 return NULL;
603 }
604
605
606 #ifdef CONFIG_MBO
607 static struct wpa_bss *
608 get_mbo_transition_candidate(struct wpa_supplicant *wpa_s,
609 enum mbo_transition_reject_reason *reason)
610 {
611 struct wpa_bss *target = NULL;
612 struct wpa_bss_trans_info params;
613 struct wpa_bss_candidate_info *info = NULL;
614 struct neighbor_report *nei = wpa_s->wnm_neighbor_report_elements;
615 u8 *first_candidate_bssid = NULL, *pos;
616 unsigned int i;
617
618 params.mbo_transition_reason = wpa_s->wnm_mbo_transition_reason;
619 params.n_candidates = 0;
620 params.bssid = os_calloc(wpa_s->wnm_num_neighbor_report, ETH_ALEN);
621 if (!params.bssid)
622 return NULL;
623
624 pos = params.bssid;
625 for (i = 0; i < wpa_s->wnm_num_neighbor_report; nei++, i++) {
626 if (nei->is_first)
627 first_candidate_bssid = nei->bssid;
628 if (!nei->acceptable)
629 continue;
630 os_memcpy(pos, nei->bssid, ETH_ALEN);
631 pos += ETH_ALEN;
632 params.n_candidates++;
633 }
634
635 if (!params.n_candidates)
636 goto end;
637
638 info = wpa_drv_get_bss_trans_status(wpa_s, &params);
639 if (!info) {
640 /* If failed to get candidate BSS transition status from driver,
641 * get the first acceptable candidate from wpa_supplicant.
642 */
643 target = wpa_bss_get_bssid(wpa_s, params.bssid);
644 goto end;
645 }
646
647 /* Get the first acceptable candidate from driver */
648 for (i = 0; i < info->num; i++) {
649 if (info->candidates[i].is_accept) {
650 target = wpa_bss_get_bssid(wpa_s,
651 info->candidates[i].bssid);
652 goto end;
653 }
654 }
655
656 /* If Disassociation Imminent is set and driver rejects all the
657 * candidate select first acceptable candidate which has
658 * rssi > disassoc_imminent_rssi_threshold
659 */
660 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
661 for (i = 0; i < info->num; i++) {
662 target = wpa_bss_get_bssid(wpa_s,
663 info->candidates[i].bssid);
664 if (target &&
665 (target->level <
666 wpa_s->conf->disassoc_imminent_rssi_threshold))
667 continue;
668 goto end;
669 }
670 }
671
672 /* While sending BTM reject use reason code of the first candidate
673 * received in BTM request frame
674 */
675 if (reason) {
676 for (i = 0; i < info->num; i++) {
677 if (first_candidate_bssid &&
678 os_memcmp(first_candidate_bssid,
679 info->candidates[i].bssid, ETH_ALEN) == 0)
680 {
681 *reason = info->candidates[i].reject_reason;
682 break;
683 }
684 }
685 }
686
687 target = NULL;
688
689 end:
690 os_free(params.bssid);
691 if (info) {
692 os_free(info->candidates);
693 os_free(info);
694 }
695 return target;
696 }
697 #endif /* CONFIG_MBO */
698
699
700 static struct wpa_bss *
701 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs,
702 enum mbo_transition_reject_reason *reason)
703 {
704 u8 i;
705 struct wpa_bss *bss = wpa_s->current_bss;
706 struct wpa_bss *target;
707
708 if (!bss)
709 return NULL;
710
711 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
712 MAC2STR(wpa_s->bssid), bss->level);
713
714 wnm_clear_acceptable(wpa_s);
715
716 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
717 struct neighbor_report *nei;
718
719 nei = &wpa_s->wnm_neighbor_report_elements[i];
720 if (nei->preference_present && nei->preference == 0) {
721 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
722 MAC2STR(nei->bssid));
723 continue;
724 }
725
726 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
727 if (!target) {
728 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
729 " (pref %d) not found in scan results",
730 MAC2STR(nei->bssid),
731 nei->preference_present ? nei->preference :
732 -1);
733 continue;
734 }
735
736 if (age_secs) {
737 struct os_reltime now;
738
739 if (os_get_reltime(&now) == 0 &&
740 os_reltime_expired(&now, &target->last_update,
741 age_secs)) {
742 wpa_printf(MSG_DEBUG,
743 "Candidate BSS is more than %ld seconds old",
744 age_secs);
745 continue;
746 }
747 }
748
749 if (bss->ssid_len != target->ssid_len ||
750 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
751 /*
752 * TODO: Could consider allowing transition to another
753 * ESS if PMF was enabled for the association.
754 */
755 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
756 " (pref %d) in different ESS",
757 MAC2STR(nei->bssid),
758 nei->preference_present ? nei->preference :
759 -1);
760 continue;
761 }
762
763 if (wpa_s->current_ssid &&
764 !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
765 1, 0)) {
766 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
767 " (pref %d) does not match the current network profile",
768 MAC2STR(nei->bssid),
769 nei->preference_present ? nei->preference :
770 -1);
771 continue;
772 }
773
774 if (wpa_is_bss_tmp_disallowed(wpa_s, target)) {
775 wpa_printf(MSG_DEBUG,
776 "MBO: Candidate BSS " MACSTR
777 " retry delay is not over yet",
778 MAC2STR(nei->bssid));
779 continue;
780 }
781
782 if (target->level < bss->level && target->level < -80) {
783 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
784 " (pref %d) does not have sufficient signal level (%d)",
785 MAC2STR(nei->bssid),
786 nei->preference_present ? nei->preference :
787 -1,
788 target->level);
789 continue;
790 }
791
792 nei->acceptable = 1;
793 }
794
795 #ifdef CONFIG_MBO
796 if (wpa_s->wnm_mbo_trans_reason_present)
797 target = get_mbo_transition_candidate(wpa_s, reason);
798 else
799 target = get_first_acceptable(wpa_s);
800 #else /* CONFIG_MBO */
801 target = get_first_acceptable(wpa_s);
802 #endif /* CONFIG_MBO */
803
804 if (target) {
805 wpa_printf(MSG_DEBUG,
806 "WNM: Found an acceptable preferred transition candidate BSS "
807 MACSTR " (RSSI %d)",
808 MAC2STR(target->bssid), target->level);
809 }
810
811 return target;
812 }
813
814
815 static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
816 {
817 const u8 *ie_a, *ie_b;
818
819 if (!a || !b)
820 return 0;
821
822 ie_a = wpa_bss_get_ie(a, eid);
823 ie_b = wpa_bss_get_ie(b, eid);
824
825 if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
826 return 0;
827
828 return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
829 }
830
831
832 static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
833 {
834 u32 info = 0;
835
836 info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
837
838 /*
839 * Leave the security and key scope bits unset to indicate that the
840 * security information is not available.
841 */
842
843 if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
844 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
845 if (bss->caps & WLAN_CAPABILITY_QOS)
846 info |= NEI_REP_BSSID_INFO_QOS;
847 if (bss->caps & WLAN_CAPABILITY_APSD)
848 info |= NEI_REP_BSSID_INFO_APSD;
849 if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
850 info |= NEI_REP_BSSID_INFO_RM;
851 if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
852 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
853 if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
854 info |= NEI_REP_BSSID_INFO_IMM_BA;
855 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
856 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
857 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
858 info |= NEI_REP_BSSID_INFO_HT;
859
860 return info;
861 }
862
863
864 static int wnm_add_nei_rep(struct wpabuf **buf, const u8 *bssid,
865 u32 bss_info, u8 op_class, u8 chan, u8 phy_type,
866 u8 pref)
867 {
868 if (wpabuf_len(*buf) + 18 >
869 IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN) {
870 wpa_printf(MSG_DEBUG,
871 "WNM: No room in frame for Neighbor Report element");
872 return -1;
873 }
874
875 if (wpabuf_resize(buf, 18) < 0) {
876 wpa_printf(MSG_DEBUG,
877 "WNM: Failed to allocate memory for Neighbor Report element");
878 return -1;
879 }
880
881 wpabuf_put_u8(*buf, WLAN_EID_NEIGHBOR_REPORT);
882 /* length: 13 for basic neighbor report + 3 for preference subelement */
883 wpabuf_put_u8(*buf, 16);
884 wpabuf_put_data(*buf, bssid, ETH_ALEN);
885 wpabuf_put_le32(*buf, bss_info);
886 wpabuf_put_u8(*buf, op_class);
887 wpabuf_put_u8(*buf, chan);
888 wpabuf_put_u8(*buf, phy_type);
889 wpabuf_put_u8(*buf, WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE);
890 wpabuf_put_u8(*buf, 1);
891 wpabuf_put_u8(*buf, pref);
892 return 0;
893 }
894
895
896 static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
897 struct wpa_bss *bss, struct wpabuf **buf,
898 u8 pref)
899 {
900 const u8 *ie;
901 u8 op_class, chan;
902 int sec_chan = 0, vht = 0;
903 enum phy_type phy_type;
904 u32 info;
905 struct ieee80211_ht_operation *ht_oper = NULL;
906 struct ieee80211_vht_operation *vht_oper = NULL;
907
908 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
909 if (ie && ie[1] >= 2) {
910 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
911
912 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
913 sec_chan = 1;
914 else if (ht_oper->ht_param &
915 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
916 sec_chan = -1;
917 }
918
919 ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
920 if (ie && ie[1] >= 1) {
921 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
922
923 if (vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80MHZ ||
924 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_160MHZ ||
925 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80P80MHZ)
926 vht = vht_oper->vht_op_info_chwidth;
927 }
928
929 if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
930 &chan) == NUM_HOSTAPD_MODES) {
931 wpa_printf(MSG_DEBUG,
932 "WNM: Cannot determine operating class and channel");
933 return -2;
934 }
935
936 phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
937 (vht_oper != NULL));
938 if (phy_type == PHY_TYPE_UNSPECIFIED) {
939 wpa_printf(MSG_DEBUG,
940 "WNM: Cannot determine BSS phy type for Neighbor Report");
941 return -2;
942 }
943
944 info = wnm_get_bss_info(wpa_s, bss);
945
946 return wnm_add_nei_rep(buf, bss->bssid, info, op_class, chan, phy_type,
947 pref);
948 }
949
950
951 static void wnm_add_cand_list(struct wpa_supplicant *wpa_s, struct wpabuf **buf)
952 {
953 unsigned int i, pref = 255;
954 struct os_reltime now;
955 struct wpa_ssid *ssid = wpa_s->current_ssid;
956
957 if (!ssid)
958 return;
959
960 /*
961 * TODO: Define when scan results are no longer valid for the candidate
962 * list.
963 */
964 os_get_reltime(&now);
965 if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
966 return;
967
968 wpa_printf(MSG_DEBUG,
969 "WNM: Add candidate list to BSS Transition Management Response frame");
970 for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
971 struct wpa_bss *bss = wpa_s->last_scan_res[i];
972 int res;
973
974 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1, 0)) {
975 res = wnm_nei_rep_add_bss(wpa_s, bss, buf, pref--);
976 if (res == -2)
977 continue; /* could not build entry for BSS */
978 if (res < 0)
979 break; /* no more room for candidates */
980 if (pref == 1)
981 break;
982 }
983 }
984
985 wpa_hexdump_buf(MSG_DEBUG,
986 "WNM: BSS Transition Management Response candidate list",
987 *buf);
988 }
989
990
991 #define BTM_RESP_MIN_SIZE 5 + ETH_ALEN
992
993 static void wnm_send_bss_transition_mgmt_resp(
994 struct wpa_supplicant *wpa_s, u8 dialog_token,
995 enum bss_trans_mgmt_status_code status,
996 enum mbo_transition_reject_reason reason,
997 u8 delay, const u8 *target_bssid)
998 {
999 struct wpabuf *buf;
1000 int res;
1001
1002 wpa_printf(MSG_DEBUG,
1003 "WNM: Send BSS Transition Management Response to " MACSTR
1004 " dialog_token=%u status=%u reason=%u delay=%d",
1005 MAC2STR(wpa_s->bssid), dialog_token, status, reason, delay);
1006 if (!wpa_s->current_bss) {
1007 wpa_printf(MSG_DEBUG,
1008 "WNM: Current BSS not known - drop response");
1009 return;
1010 }
1011
1012 buf = wpabuf_alloc(BTM_RESP_MIN_SIZE);
1013 if (!buf) {
1014 wpa_printf(MSG_DEBUG,
1015 "WNM: Failed to allocate memory for BTM response");
1016 return;
1017 }
1018
1019 wpa_s->bss_tm_status = status;
1020 wpas_notify_bss_tm_status(wpa_s);
1021
1022 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1023 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_RESP);
1024 wpabuf_put_u8(buf, dialog_token);
1025 wpabuf_put_u8(buf, status);
1026 wpabuf_put_u8(buf, delay);
1027 if (target_bssid) {
1028 wpabuf_put_data(buf, target_bssid, ETH_ALEN);
1029 } else if (status == WNM_BSS_TM_ACCEPT) {
1030 /*
1031 * P802.11-REVmc clarifies that the Target BSSID field is always
1032 * present when status code is zero, so use a fake value here if
1033 * no BSSID is yet known.
1034 */
1035 wpabuf_put_data(buf, "\0\0\0\0\0\0", ETH_ALEN);
1036 }
1037
1038 if (status == WNM_BSS_TM_ACCEPT)
1039 wnm_add_cand_list(wpa_s, &buf);
1040
1041 #ifdef CONFIG_MBO
1042 if (status != WNM_BSS_TM_ACCEPT &&
1043 wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) {
1044 u8 mbo[10];
1045 size_t ret;
1046
1047 ret = wpas_mbo_ie_bss_trans_reject(wpa_s, mbo, sizeof(mbo),
1048 reason);
1049 if (ret) {
1050 if (wpabuf_resize(&buf, ret) < 0) {
1051 wpabuf_free(buf);
1052 wpa_printf(MSG_DEBUG,
1053 "WNM: Failed to allocate memory for MBO IE");
1054 return;
1055 }
1056
1057 wpabuf_put_data(buf, mbo, ret);
1058 }
1059 }
1060 #endif /* CONFIG_MBO */
1061
1062 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1063 wpa_s->own_addr, wpa_s->bssid,
1064 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1065 if (res < 0) {
1066 wpa_printf(MSG_DEBUG,
1067 "WNM: Failed to send BSS Transition Management Response");
1068 }
1069
1070 wpabuf_free(buf);
1071 }
1072
1073
1074 static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
1075 struct wpa_bss *bss, struct wpa_ssid *ssid,
1076 int after_new_scan)
1077 {
1078 wpa_dbg(wpa_s, MSG_DEBUG,
1079 "WNM: Transition to BSS " MACSTR
1080 " based on BSS Transition Management Request (old BSSID "
1081 MACSTR " after_new_scan=%d)",
1082 MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan);
1083
1084 /* Send the BSS Management Response - Accept */
1085 if (wpa_s->wnm_reply) {
1086 wpa_s->wnm_reply = 0;
1087 wpa_printf(MSG_DEBUG,
1088 "WNM: Sending successful BSS Transition Management Response");
1089 wnm_send_bss_transition_mgmt_resp(
1090 wpa_s, wpa_s->wnm_dialog_token, WNM_BSS_TM_ACCEPT,
1091 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1092 bss->bssid);
1093 }
1094
1095 if (bss == wpa_s->current_bss) {
1096 wpa_printf(MSG_DEBUG,
1097 "WNM: Already associated with the preferred candidate");
1098 wnm_deallocate_memory(wpa_s);
1099 return;
1100 }
1101
1102 wpa_s->reassociate = 1;
1103 wpa_printf(MSG_DEBUG, "WNM: Issuing connect");
1104 wpa_supplicant_connect(wpa_s, bss, ssid);
1105 wnm_deallocate_memory(wpa_s);
1106 }
1107
1108
1109 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
1110 {
1111 struct wpa_bss *bss;
1112 struct wpa_ssid *ssid = wpa_s->current_ssid;
1113 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1114 enum mbo_transition_reject_reason reason =
1115 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED;
1116
1117 if (!wpa_s->wnm_neighbor_report_elements)
1118 return 0;
1119
1120 wpa_dbg(wpa_s, MSG_DEBUG,
1121 "WNM: Process scan results for BSS Transition Management");
1122 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
1123 &wpa_s->scan_trigger_time)) {
1124 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
1125 wnm_deallocate_memory(wpa_s);
1126 return 0;
1127 }
1128
1129 if (!wpa_s->current_bss ||
1130 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
1131 ETH_ALEN) != 0) {
1132 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
1133 return 0;
1134 }
1135
1136 /* Compare the Neighbor Report and scan results */
1137 bss = compare_scan_neighbor_results(wpa_s, 0, &reason);
1138 if (!bss) {
1139 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
1140 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
1141 goto send_bss_resp_fail;
1142 }
1143
1144 /* Associate to the network */
1145 wnm_bss_tm_connect(wpa_s, bss, ssid, 1);
1146 return 1;
1147
1148 send_bss_resp_fail:
1149 if (!reply_on_fail)
1150 return 0;
1151
1152 /* Send reject response for all the failures */
1153
1154 if (wpa_s->wnm_reply) {
1155 wpa_s->wnm_reply = 0;
1156 wnm_send_bss_transition_mgmt_resp(wpa_s,
1157 wpa_s->wnm_dialog_token,
1158 status, reason, 0, NULL);
1159 }
1160 wnm_deallocate_memory(wpa_s);
1161
1162 return 0;
1163 }
1164
1165
1166 static int cand_pref_compar(const void *a, const void *b)
1167 {
1168 const struct neighbor_report *aa = a;
1169 const struct neighbor_report *bb = b;
1170
1171 if (!aa->preference_present && !bb->preference_present)
1172 return 0;
1173 if (!aa->preference_present)
1174 return 1;
1175 if (!bb->preference_present)
1176 return -1;
1177 if (bb->preference > aa->preference)
1178 return 1;
1179 if (bb->preference < aa->preference)
1180 return -1;
1181 return 0;
1182 }
1183
1184
1185 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
1186 {
1187 if (!wpa_s->wnm_neighbor_report_elements)
1188 return;
1189 qsort(wpa_s->wnm_neighbor_report_elements,
1190 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
1191 cand_pref_compar);
1192 }
1193
1194
1195 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
1196 {
1197 unsigned int i;
1198
1199 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
1200 if (!wpa_s->wnm_neighbor_report_elements)
1201 return;
1202 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1203 struct neighbor_report *nei;
1204
1205 nei = &wpa_s->wnm_neighbor_report_elements[i];
1206 wpa_printf(MSG_DEBUG, "%u: " MACSTR
1207 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
1208 i, MAC2STR(nei->bssid), nei->bssid_info,
1209 nei->regulatory_class,
1210 nei->channel_number, nei->phy_type,
1211 nei->preference_present ? nei->preference : -1,
1212 nei->freq);
1213 }
1214 }
1215
1216
1217 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
1218 {
1219 unsigned int i;
1220
1221 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1222 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
1223 int j;
1224
1225 for (j = 0; j < mode->num_channels; j++) {
1226 struct hostapd_channel_data *chan;
1227
1228 chan = &mode->channels[j];
1229 if (chan->freq == freq &&
1230 !(chan->flag & HOSTAPD_CHAN_DISABLED))
1231 return 1;
1232 }
1233 }
1234
1235 return 0;
1236 }
1237
1238
1239 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
1240 {
1241 int *freqs;
1242 int num_freqs = 0;
1243 unsigned int i;
1244
1245 if (!wpa_s->wnm_neighbor_report_elements)
1246 return;
1247
1248 if (wpa_s->hw.modes == NULL)
1249 return;
1250
1251 os_free(wpa_s->next_scan_freqs);
1252 wpa_s->next_scan_freqs = NULL;
1253
1254 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
1255 if (freqs == NULL)
1256 return;
1257
1258 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1259 struct neighbor_report *nei;
1260
1261 nei = &wpa_s->wnm_neighbor_report_elements[i];
1262 if (nei->freq <= 0) {
1263 wpa_printf(MSG_DEBUG,
1264 "WNM: Unknown neighbor operating frequency for "
1265 MACSTR " - scan all channels",
1266 MAC2STR(nei->bssid));
1267 os_free(freqs);
1268 return;
1269 }
1270 if (chan_supported(wpa_s, nei->freq))
1271 add_freq(freqs, &num_freqs, nei->freq);
1272 }
1273
1274 if (num_freqs == 0) {
1275 os_free(freqs);
1276 return;
1277 }
1278
1279 wpa_printf(MSG_DEBUG,
1280 "WNM: Scan %d frequencies based on transition candidate list",
1281 num_freqs);
1282 wpa_s->next_scan_freqs = freqs;
1283 }
1284
1285
1286 static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
1287 {
1288 struct wpa_scan_results *scan_res;
1289 struct wpa_bss *bss;
1290 struct wpa_ssid *ssid = wpa_s->current_ssid;
1291 u8 i, found = 0;
1292 size_t j;
1293
1294 wpa_dbg(wpa_s, MSG_DEBUG,
1295 "WNM: Fetch current scan results from the driver for checking transition candidates");
1296 scan_res = wpa_drv_get_scan_results2(wpa_s);
1297 if (!scan_res) {
1298 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
1299 return 0;
1300 }
1301
1302 if (scan_res->fetch_time.sec == 0)
1303 os_get_reltime(&scan_res->fetch_time);
1304
1305 filter_scan_res(wpa_s, scan_res);
1306
1307 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1308 struct neighbor_report *nei;
1309
1310 nei = &wpa_s->wnm_neighbor_report_elements[i];
1311 if (nei->preference_present && nei->preference == 0)
1312 continue;
1313
1314 for (j = 0; j < scan_res->num; j++) {
1315 struct wpa_scan_res *res;
1316 const u8 *ssid_ie;
1317
1318 res = scan_res->res[j];
1319 if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
1320 res->age > WNM_SCAN_RESULT_AGE * 1000)
1321 continue;
1322 bss = wpa_s->current_bss;
1323 ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
1324 if (bss && ssid_ie &&
1325 (bss->ssid_len != ssid_ie[1] ||
1326 os_memcmp(bss->ssid, ssid_ie + 2,
1327 bss->ssid_len) != 0))
1328 continue;
1329
1330 /* Potential candidate found */
1331 found = 1;
1332 scan_snr(res);
1333 scan_est_throughput(wpa_s, res);
1334 wpa_bss_update_scan_res(wpa_s, res,
1335 &scan_res->fetch_time);
1336 }
1337 }
1338
1339 wpa_scan_results_free(scan_res);
1340 if (!found) {
1341 wpa_dbg(wpa_s, MSG_DEBUG,
1342 "WNM: No transition candidate matches existing scan results");
1343 return 0;
1344 }
1345
1346 bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL);
1347 if (!bss) {
1348 wpa_dbg(wpa_s, MSG_DEBUG,
1349 "WNM: Comparison of scan results against transition candidates did not find matches");
1350 return 0;
1351 }
1352
1353 /* Associate to the network */
1354 wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
1355 return 1;
1356 }
1357
1358
1359 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1360 const u8 *pos, const u8 *end,
1361 int reply)
1362 {
1363 unsigned int beacon_int;
1364 u8 valid_int;
1365 #ifdef CONFIG_MBO
1366 const u8 *vendor;
1367 #endif /* CONFIG_MBO */
1368
1369 if (end - pos < 5)
1370 return;
1371
1372 #ifdef CONFIG_MBO
1373 wpa_s->wnm_mbo_trans_reason_present = 0;
1374 wpa_s->wnm_mbo_transition_reason = 0;
1375 #endif /* CONFIG_MBO */
1376
1377 if (wpa_s->current_bss)
1378 beacon_int = wpa_s->current_bss->beacon_int;
1379 else
1380 beacon_int = 100; /* best guess */
1381
1382 wpa_s->wnm_dialog_token = pos[0];
1383 wpa_s->wnm_mode = pos[1];
1384 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
1385 valid_int = pos[4];
1386 wpa_s->wnm_reply = reply;
1387
1388 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1389 "dialog_token=%u request_mode=0x%x "
1390 "disassoc_timer=%u validity_interval=%u",
1391 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
1392 wpa_s->wnm_dissoc_timer, valid_int);
1393
1394 #if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS)
1395 if (wpa_s->reject_btm_req_reason) {
1396 wpa_printf(MSG_INFO,
1397 "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d",
1398 wpa_s->reject_btm_req_reason);
1399 wnm_send_bss_transition_mgmt_resp(
1400 wpa_s, wpa_s->wnm_dialog_token,
1401 wpa_s->reject_btm_req_reason,
1402 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1403 return;
1404 }
1405 #endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */
1406
1407 pos += 5;
1408
1409 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
1410 if (end - pos < 12) {
1411 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1412 return;
1413 }
1414 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
1415 pos += 12; /* BSS Termination Duration */
1416 }
1417
1418 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
1419 char url[256];
1420
1421 if (end - pos < 1 || 1 + pos[0] > end - pos) {
1422 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1423 "Management Request (URL)");
1424 return;
1425 }
1426 os_memcpy(url, pos + 1, pos[0]);
1427 url[pos[0]] = '\0';
1428 pos += 1 + pos[0];
1429
1430 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1431 wpa_sm_pmf_enabled(wpa_s->wpa),
1432 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
1433 }
1434
1435 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
1436 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
1437 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1438 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
1439 /* TODO: mark current BSS less preferred for
1440 * selection */
1441 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1442 wpa_supplicant_req_scan(wpa_s, 0, 0);
1443 }
1444 }
1445
1446 #ifdef CONFIG_MBO
1447 vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
1448 if (vendor)
1449 wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
1450 #endif /* CONFIG_MBO */
1451
1452 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
1453 unsigned int valid_ms;
1454
1455 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
1456 wnm_deallocate_memory(wpa_s);
1457 wpa_s->wnm_neighbor_report_elements = os_calloc(
1458 WNM_MAX_NEIGHBOR_REPORT,
1459 sizeof(struct neighbor_report));
1460 if (wpa_s->wnm_neighbor_report_elements == NULL)
1461 return;
1462
1463 while (end - pos >= 2 &&
1464 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1465 {
1466 u8 tag = *pos++;
1467 u8 len = *pos++;
1468
1469 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1470 tag);
1471 if (len > end - pos) {
1472 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1473 return;
1474 }
1475 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1476 struct neighbor_report *rep;
1477 rep = &wpa_s->wnm_neighbor_report_elements[
1478 wpa_s->wnm_num_neighbor_report];
1479 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
1480 wpa_s->wnm_num_neighbor_report++;
1481 #ifdef CONFIG_MBO
1482 if (wpa_s->wnm_mbo_trans_reason_present &&
1483 wpa_s->wnm_num_neighbor_report == 1) {
1484 rep->is_first = 1;
1485 wpa_printf(MSG_DEBUG,
1486 "WNM: First transition candidate is "
1487 MACSTR, MAC2STR(rep->bssid));
1488 }
1489 #endif /* CONFIG_MBO */
1490 }
1491
1492 pos += len;
1493 }
1494
1495 if (!wpa_s->wnm_num_neighbor_report) {
1496 wpa_printf(MSG_DEBUG,
1497 "WNM: Candidate list included bit is set, but no candidates found");
1498 wnm_send_bss_transition_mgmt_resp(
1499 wpa_s, wpa_s->wnm_dialog_token,
1500 WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
1501 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1502 NULL);
1503 return;
1504 }
1505
1506 wnm_sort_cand_list(wpa_s);
1507 wnm_dump_cand_list(wpa_s);
1508 valid_ms = valid_int * beacon_int * 128 / 125;
1509 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1510 valid_ms);
1511 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1512 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1513 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1514 wpa_s->wnm_cand_valid_until.sec +=
1515 wpa_s->wnm_cand_valid_until.usec / 1000000;
1516 wpa_s->wnm_cand_valid_until.usec %= 1000000;
1517 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
1518
1519 /*
1520 * Fetch the latest scan results from the kernel and check for
1521 * candidates based on those results first. This can help in
1522 * finding more up-to-date information should the driver has
1523 * done some internal scanning operations after the last scan
1524 * result update in wpa_supplicant.
1525 */
1526 if (wnm_fetch_scan_results(wpa_s) > 0)
1527 return;
1528
1529 /*
1530 * Try to use previously received scan results, if they are
1531 * recent enough to use for a connection.
1532 */
1533 if (wpa_s->last_scan_res_used > 0) {
1534 struct os_reltime now;
1535
1536 os_get_reltime(&now);
1537 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1538 wpa_printf(MSG_DEBUG,
1539 "WNM: Try to use recent scan results");
1540 if (wnm_scan_process(wpa_s, 0) > 0)
1541 return;
1542 wpa_printf(MSG_DEBUG,
1543 "WNM: No match in previous scan results - try a new scan");
1544 }
1545 }
1546
1547 wnm_set_scan_freqs(wpa_s);
1548 if (wpa_s->wnm_num_neighbor_report == 1) {
1549 os_memcpy(wpa_s->next_scan_bssid,
1550 wpa_s->wnm_neighbor_report_elements[0].bssid,
1551 ETH_ALEN);
1552 wpa_printf(MSG_DEBUG,
1553 "WNM: Scan only for a specific BSSID since there is only a single candidate "
1554 MACSTR, MAC2STR(wpa_s->next_scan_bssid));
1555 }
1556 wpa_supplicant_req_scan(wpa_s, 0, 0);
1557 } else if (reply) {
1558 enum bss_trans_mgmt_status_code status;
1559 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1560 status = WNM_BSS_TM_ACCEPT;
1561 else {
1562 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1563 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1564 }
1565 wnm_send_bss_transition_mgmt_resp(
1566 wpa_s, wpa_s->wnm_dialog_token, status,
1567 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1568 }
1569 }
1570
1571
1572 #define BTM_QUERY_MIN_SIZE 4
1573
1574 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
1575 u8 query_reason,
1576 const char *btm_candidates,
1577 int cand_list)
1578 {
1579 struct wpabuf *buf;
1580 int ret;
1581
1582 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
1583 MACSTR " query_reason=%u%s",
1584 MAC2STR(wpa_s->bssid), query_reason,
1585 cand_list ? " candidate list" : "");
1586
1587 buf = wpabuf_alloc(BTM_QUERY_MIN_SIZE);
1588 if (!buf)
1589 return -1;
1590
1591 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1592 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_QUERY);
1593 wpabuf_put_u8(buf, 1);
1594 wpabuf_put_u8(buf, query_reason);
1595
1596 if (cand_list)
1597 wnm_add_cand_list(wpa_s, &buf);
1598
1599 if (btm_candidates) {
1600 const size_t max_len = 1000;
1601
1602 ret = wpabuf_resize(&buf, max_len);
1603 if (ret < 0) {
1604 wpabuf_free(buf);
1605 return ret;
1606 }
1607
1608 ret = ieee802_11_parse_candidate_list(btm_candidates,
1609 wpabuf_put(buf, 0),
1610 max_len);
1611 if (ret < 0) {
1612 wpabuf_free(buf);
1613 return ret;
1614 }
1615
1616 wpabuf_put(buf, ret);
1617 }
1618
1619 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1620 wpa_s->own_addr, wpa_s->bssid,
1621 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1622
1623 wpabuf_free(buf);
1624 return ret;
1625 }
1626
1627
1628 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1629 const u8 *sa, const u8 *data,
1630 int len)
1631 {
1632 const u8 *pos, *end, *next;
1633 u8 ie, ie_len;
1634
1635 pos = data;
1636 end = data + len;
1637
1638 while (end - pos > 1) {
1639 ie = *pos++;
1640 ie_len = *pos++;
1641 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1642 ie, ie_len);
1643 if (ie_len > end - pos) {
1644 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1645 "subelement");
1646 break;
1647 }
1648 next = pos + ie_len;
1649 if (ie_len < 4) {
1650 pos = next;
1651 continue;
1652 }
1653 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1654 WPA_GET_BE24(pos), pos[3]);
1655
1656 #ifdef CONFIG_HS20
1657 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1658 WPA_GET_BE24(pos) == OUI_WFA &&
1659 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1660 /* Subscription Remediation subelement */
1661 const u8 *ie_end;
1662 u8 url_len;
1663 char *url;
1664 u8 osu_method;
1665
1666 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1667 "subelement");
1668 ie_end = pos + ie_len;
1669 pos += 4;
1670 url_len = *pos++;
1671 if (url_len == 0) {
1672 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1673 url = NULL;
1674 osu_method = 1;
1675 } else {
1676 if (url_len + 1 > ie_end - pos) {
1677 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1678 url_len,
1679 (int) (ie_end - pos));
1680 break;
1681 }
1682 url = os_malloc(url_len + 1);
1683 if (url == NULL)
1684 break;
1685 os_memcpy(url, pos, url_len);
1686 url[url_len] = '\0';
1687 osu_method = pos[url_len];
1688 }
1689 hs20_rx_subscription_remediation(wpa_s, url,
1690 osu_method);
1691 os_free(url);
1692 pos = next;
1693 continue;
1694 }
1695
1696 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1697 WPA_GET_BE24(pos) == OUI_WFA &&
1698 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1699 const u8 *ie_end;
1700 u8 url_len;
1701 char *url;
1702 u8 code;
1703 u16 reauth_delay;
1704
1705 ie_end = pos + ie_len;
1706 pos += 4;
1707 code = *pos++;
1708 reauth_delay = WPA_GET_LE16(pos);
1709 pos += 2;
1710 url_len = *pos++;
1711 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1712 "Imminent - Reason Code %u "
1713 "Re-Auth Delay %u URL Length %u",
1714 code, reauth_delay, url_len);
1715 if (url_len > ie_end - pos)
1716 break;
1717 url = os_malloc(url_len + 1);
1718 if (url == NULL)
1719 break;
1720 os_memcpy(url, pos, url_len);
1721 url[url_len] = '\0';
1722 hs20_rx_deauth_imminent_notice(wpa_s, code,
1723 reauth_delay, url);
1724 os_free(url);
1725 pos = next;
1726 continue;
1727 }
1728
1729 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1730 WPA_GET_BE24(pos) == OUI_WFA &&
1731 pos[3] == HS20_WNM_T_C_ACCEPTANCE) {
1732 const u8 *ie_end;
1733 u8 url_len;
1734 char *url;
1735
1736 ie_end = pos + ie_len;
1737 pos += 4;
1738 url_len = *pos++;
1739 wpa_printf(MSG_DEBUG,
1740 "WNM: HS 2.0 Terms and Conditions Acceptance (URL Length %u)",
1741 url_len);
1742 if (url_len > ie_end - pos)
1743 break;
1744 url = os_malloc(url_len + 1);
1745 if (!url)
1746 break;
1747 os_memcpy(url, pos, url_len);
1748 url[url_len] = '\0';
1749 hs20_rx_t_c_acceptance(wpa_s, url);
1750 os_free(url);
1751 pos = next;
1752 continue;
1753 }
1754 #endif /* CONFIG_HS20 */
1755
1756 pos = next;
1757 }
1758 }
1759
1760
1761 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1762 const u8 *sa, const u8 *frm, int len)
1763 {
1764 const u8 *pos, *end;
1765 u8 dialog_token, type;
1766
1767 /* Dialog Token [1] | Type [1] | Subelements */
1768
1769 if (len < 2 || sa == NULL)
1770 return;
1771 end = frm + len;
1772 pos = frm;
1773 dialog_token = *pos++;
1774 type = *pos++;
1775
1776 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1777 "(dialog_token %u type %u sa " MACSTR ")",
1778 dialog_token, type, MAC2STR(sa));
1779 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1780 pos, end - pos);
1781
1782 if (wpa_s->wpa_state != WPA_COMPLETED ||
1783 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1784 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1785 "from our AP - ignore it");
1786 return;
1787 }
1788
1789 switch (type) {
1790 case 1:
1791 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1792 break;
1793 default:
1794 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1795 "WNM-Notification type %u", type);
1796 break;
1797 }
1798 }
1799
1800
1801 static void ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant *wpa_s,
1802 const u8 *sa, const u8 *frm,
1803 int len)
1804 {
1805 u8 dialog_token, req_info, auto_report, timeout;
1806
1807 if (!wpa_s->conf->coloc_intf_reporting)
1808 return;
1809
1810 /* Dialog Token [1] | Request Info [1] */
1811
1812 if (len < 2)
1813 return;
1814 dialog_token = frm[0];
1815 req_info = frm[1];
1816 auto_report = req_info & 0x03;
1817 timeout = req_info >> 2;
1818
1819 wpa_dbg(wpa_s, MSG_DEBUG,
1820 "WNM: Received Collocated Interference Request (dialog_token %u auto_report %u timeout %u sa " MACSTR ")",
1821 dialog_token, auto_report, timeout, MAC2STR(sa));
1822
1823 if (dialog_token == 0)
1824 return; /* only nonzero values are used for request */
1825
1826 if (wpa_s->wpa_state != WPA_COMPLETED ||
1827 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1828 wpa_dbg(wpa_s, MSG_DEBUG,
1829 "WNM: Collocated Interference Request frame not from current AP - ignore it");
1830 return;
1831 }
1832
1833 wpa_msg(wpa_s, MSG_INFO, COLOC_INTF_REQ "%u %u %u",
1834 dialog_token, auto_report, timeout);
1835 wpa_s->coloc_intf_dialog_token = dialog_token;
1836 wpa_s->coloc_intf_auto_report = auto_report;
1837 wpa_s->coloc_intf_timeout = timeout;
1838 }
1839
1840
1841 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1842 const struct ieee80211_mgmt *mgmt, size_t len)
1843 {
1844 const u8 *pos, *end;
1845 u8 act;
1846
1847 if (len < IEEE80211_HDRLEN + 2)
1848 return;
1849
1850 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1851 act = *pos++;
1852 end = ((const u8 *) mgmt) + len;
1853
1854 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1855 act, MAC2STR(mgmt->sa));
1856 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1857 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1858 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1859 "frame");
1860 return;
1861 }
1862
1863 switch (act) {
1864 case WNM_BSS_TRANS_MGMT_REQ:
1865 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1866 !(mgmt->da[0] & 0x01));
1867 break;
1868 case WNM_SLEEP_MODE_RESP:
1869 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1870 break;
1871 case WNM_NOTIFICATION_REQ:
1872 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1873 break;
1874 case WNM_COLLOCATED_INTERFERENCE_REQ:
1875 ieee802_11_rx_wnm_coloc_intf_req(wpa_s, mgmt->sa, pos,
1876 end - pos);
1877 break;
1878 default:
1879 wpa_printf(MSG_ERROR, "WNM: Unknown request");
1880 break;
1881 }
1882 }
1883
1884
1885 int wnm_send_coloc_intf_report(struct wpa_supplicant *wpa_s, u8 dialog_token,
1886 const struct wpabuf *elems)
1887 {
1888 struct wpabuf *buf;
1889 int ret;
1890
1891 if (wpa_s->wpa_state < WPA_ASSOCIATED || !elems)
1892 return -1;
1893
1894 wpa_printf(MSG_DEBUG, "WNM: Send Collocated Interference Report to "
1895 MACSTR " (dialog token %u)",
1896 MAC2STR(wpa_s->bssid), dialog_token);
1897
1898 buf = wpabuf_alloc(3 + wpabuf_len(elems));
1899 if (!buf)
1900 return -1;
1901
1902 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1903 wpabuf_put_u8(buf, WNM_COLLOCATED_INTERFERENCE_REPORT);
1904 wpabuf_put_u8(buf, dialog_token);
1905 wpabuf_put_buf(buf, elems);
1906
1907 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1908 wpa_s->own_addr, wpa_s->bssid,
1909 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1910 wpabuf_free(buf);
1911 return ret;
1912 }
1913
1914
1915 void wnm_set_coloc_intf_elems(struct wpa_supplicant *wpa_s,
1916 struct wpabuf *elems)
1917 {
1918 wpabuf_free(wpa_s->coloc_intf_elems);
1919 if (elems && wpabuf_len(elems) == 0) {
1920 wpabuf_free(elems);
1921 elems = NULL;
1922 }
1923 wpa_s->coloc_intf_elems = elems;
1924
1925 if (wpa_s->conf->coloc_intf_reporting && wpa_s->coloc_intf_elems &&
1926 wpa_s->coloc_intf_dialog_token &&
1927 (wpa_s->coloc_intf_auto_report == 1 ||
1928 wpa_s->coloc_intf_auto_report == 3)) {
1929 /* TODO: Check that there has not been less than
1930 * wpa_s->coloc_intf_timeout * 200 TU from the last report.
1931 */
1932 wnm_send_coloc_intf_report(wpa_s,
1933 wpa_s->coloc_intf_dialog_token,
1934 wpa_s->coloc_intf_elems);
1935 }
1936 }
1937
1938
1939 void wnm_clear_coloc_intf_reporting(struct wpa_supplicant *wpa_s)
1940 {
1941 #ifdef CONFIG_WNM
1942 wpa_s->coloc_intf_dialog_token = 0;
1943 wpa_s->coloc_intf_auto_report = 0;
1944 #endif /* CONFIG_WNM */
1945 }
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