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WNM: Add candidate list to BSS transition response
[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 "rsn_supp/wpa.h"
16 #include "wpa_supplicant_i.h"
17 #include "driver_i.h"
18 #include "scan.h"
19 #include "ctrl_iface.h"
20 #include "bss.h"
21 #include "wnm_sta.h"
22 #include "hs20_supplicant.h"
23
24 #define MAX_TFS_IE_LEN 1024
25 #define WNM_MAX_NEIGHBOR_REPORT 10
26
27
28 /* get the TFS IE from driver */
29 static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
30 u16 *buf_len, enum wnm_oper oper)
31 {
32 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
33
34 return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
35 }
36
37
38 /* set the TFS IE to driver */
39 static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
40 const u8 *addr, const u8 *buf, u16 buf_len,
41 enum wnm_oper oper)
42 {
43 u16 len = buf_len;
44
45 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
46
47 return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
48 }
49
50
51 /* MLME-SLEEPMODE.request */
52 int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
53 u8 action, u16 intval, struct wpabuf *tfs_req)
54 {
55 struct ieee80211_mgmt *mgmt;
56 int res;
57 size_t len;
58 struct wnm_sleep_element *wnmsleep_ie;
59 u8 *wnmtfs_ie;
60 u8 wnmsleep_ie_len;
61 u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
62 enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
63 WNM_SLEEP_TFS_REQ_IE_NONE;
64
65 wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
66 "action=%s to " MACSTR,
67 action == 0 ? "enter" : "exit",
68 MAC2STR(wpa_s->bssid));
69
70 /* WNM-Sleep Mode IE */
71 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
72 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
73 if (wnmsleep_ie == NULL)
74 return -1;
75 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
76 wnmsleep_ie->len = wnmsleep_ie_len - 2;
77 wnmsleep_ie->action_type = action;
78 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
79 wnmsleep_ie->intval = host_to_le16(intval);
80 wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
81 (u8 *) wnmsleep_ie, wnmsleep_ie_len);
82
83 /* TFS IE(s) */
84 if (tfs_req) {
85 wnmtfs_ie_len = wpabuf_len(tfs_req);
86 wnmtfs_ie = os_malloc(wnmtfs_ie_len);
87 if (wnmtfs_ie == NULL) {
88 os_free(wnmsleep_ie);
89 return -1;
90 }
91 os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
92 } else {
93 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
94 if (wnmtfs_ie == NULL) {
95 os_free(wnmsleep_ie);
96 return -1;
97 }
98 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
99 tfs_oper)) {
100 wnmtfs_ie_len = 0;
101 os_free(wnmtfs_ie);
102 wnmtfs_ie = NULL;
103 }
104 }
105 wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
106 (u8 *) wnmtfs_ie, wnmtfs_ie_len);
107
108 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
109 if (mgmt == NULL) {
110 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
111 "WNM-Sleep Request action frame");
112 os_free(wnmsleep_ie);
113 os_free(wnmtfs_ie);
114 return -1;
115 }
116
117 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
118 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
119 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
120 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
121 WLAN_FC_STYPE_ACTION);
122 mgmt->u.action.category = WLAN_ACTION_WNM;
123 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
124 mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
125 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
126 wnmsleep_ie_len);
127 /* copy TFS IE here */
128 if (wnmtfs_ie_len > 0) {
129 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
130 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
131 }
132
133 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
134 wnmtfs_ie_len;
135
136 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
137 wpa_s->own_addr, wpa_s->bssid,
138 &mgmt->u.action.category, len, 0);
139 if (res < 0)
140 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
141 "(action=%d, intval=%d)", action, intval);
142 else
143 wpa_s->wnmsleep_used = 1;
144
145 os_free(wnmsleep_ie);
146 os_free(wnmtfs_ie);
147 os_free(mgmt);
148
149 return res;
150 }
151
152
153 static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
154 const u8 *tfsresp_ie_start,
155 const u8 *tfsresp_ie_end)
156 {
157 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
158 wpa_s->bssid, NULL, NULL);
159 /* remove GTK/IGTK ?? */
160
161 /* set the TFS Resp IE(s) */
162 if (tfsresp_ie_start && tfsresp_ie_end &&
163 tfsresp_ie_end - tfsresp_ie_start >= 0) {
164 u16 tfsresp_ie_len;
165 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
166 tfsresp_ie_start;
167 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
168 /* pass the TFS Resp IE(s) to driver for processing */
169 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
170 tfsresp_ie_start,
171 tfsresp_ie_len,
172 WNM_SLEEP_TFS_RESP_IE_SET))
173 wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
174 }
175 }
176
177
178 static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
179 const u8 *frm, u16 key_len_total)
180 {
181 u8 *ptr, *end;
182 u8 gtk_len;
183
184 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
185 NULL, NULL);
186
187 /* Install GTK/IGTK */
188
189 /* point to key data field */
190 ptr = (u8 *) frm + 1 + 2;
191 end = ptr + key_len_total;
192 wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
193
194 if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
195 wpa_msg(wpa_s, MSG_INFO,
196 "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
197 return;
198 }
199
200 while (end - ptr > 1) {
201 if (2 + ptr[1] > end - ptr) {
202 wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
203 "length");
204 if (end > ptr) {
205 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
206 ptr, end - ptr);
207 }
208 break;
209 }
210 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
211 if (ptr[1] < 11 + 5) {
212 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
213 "subelem");
214 break;
215 }
216 gtk_len = *(ptr + 4);
217 if (ptr[1] < 11 + gtk_len ||
218 gtk_len < 5 || gtk_len > 32) {
219 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
220 "subelem");
221 break;
222 }
223 wpa_wnmsleep_install_key(
224 wpa_s->wpa,
225 WNM_SLEEP_SUBELEM_GTK,
226 ptr);
227 ptr += 13 + gtk_len;
228 #ifdef CONFIG_IEEE80211W
229 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
230 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
231 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
232 "subelem");
233 break;
234 }
235 wpa_wnmsleep_install_key(wpa_s->wpa,
236 WNM_SLEEP_SUBELEM_IGTK, ptr);
237 ptr += 10 + WPA_IGTK_LEN;
238 #endif /* CONFIG_IEEE80211W */
239 } else
240 break; /* skip the loop */
241 }
242 }
243
244
245 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
246 const u8 *frm, int len)
247 {
248 /*
249 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
250 * WNM-Sleep Mode IE | TFS Response IE
251 */
252 const u8 *pos = frm; /* point to payload after the action field */
253 u16 key_len_total;
254 struct wnm_sleep_element *wnmsleep_ie = NULL;
255 /* multiple TFS Resp IE (assuming consecutive) */
256 const u8 *tfsresp_ie_start = NULL;
257 const u8 *tfsresp_ie_end = NULL;
258 size_t left;
259
260 if (!wpa_s->wnmsleep_used) {
261 wpa_printf(MSG_DEBUG,
262 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode has not been used in this association");
263 return;
264 }
265
266 if (len < 3)
267 return;
268 key_len_total = WPA_GET_LE16(frm + 1);
269
270 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
271 frm[0], key_len_total);
272 left = len - 3;
273 if (key_len_total > left) {
274 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
275 return;
276 }
277 pos += 3 + key_len_total;
278 while (pos - frm + 1 < len) {
279 u8 ie_len = *(pos + 1);
280 if (2 + ie_len > frm + len - pos) {
281 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
282 break;
283 }
284 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
285 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
286 wnmsleep_ie = (struct wnm_sleep_element *) pos;
287 else if (*pos == WLAN_EID_TFS_RESP) {
288 if (!tfsresp_ie_start)
289 tfsresp_ie_start = pos;
290 tfsresp_ie_end = pos;
291 } else
292 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
293 pos += ie_len + 2;
294 }
295
296 if (!wnmsleep_ie) {
297 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
298 return;
299 }
300
301 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
302 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
303 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
304 "frame (action=%d, intval=%d)",
305 wnmsleep_ie->action_type, wnmsleep_ie->intval);
306 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
307 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
308 tfsresp_ie_end);
309 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
310 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
311 }
312 } else {
313 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
314 "(action=%d, intval=%d)",
315 wnmsleep_ie->action_type, wnmsleep_ie->intval);
316 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
317 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
318 wpa_s->bssid, NULL, NULL);
319 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
320 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
321 wpa_s->bssid, NULL, NULL);
322 }
323 }
324
325
326 void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
327 {
328 int i;
329
330 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
331 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
332 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
333 }
334
335 wpa_s->wnm_num_neighbor_report = 0;
336 os_free(wpa_s->wnm_neighbor_report_elements);
337 wpa_s->wnm_neighbor_report_elements = NULL;
338 }
339
340
341 static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
342 u8 id, u8 elen, const u8 *pos)
343 {
344 switch (id) {
345 case WNM_NEIGHBOR_TSF:
346 if (elen < 2 + 2) {
347 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
348 break;
349 }
350 rep->tsf_offset = WPA_GET_LE16(pos);
351 rep->beacon_int = WPA_GET_LE16(pos + 2);
352 rep->tsf_present = 1;
353 break;
354 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
355 if (elen < 2) {
356 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
357 "country string");
358 break;
359 }
360 os_memcpy(rep->country, pos, 2);
361 rep->country_present = 1;
362 break;
363 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
364 if (elen < 1) {
365 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
366 "candidate");
367 break;
368 }
369 rep->preference = pos[0];
370 rep->preference_present = 1;
371 break;
372 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
373 rep->bss_term_tsf = WPA_GET_LE64(pos);
374 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
375 rep->bss_term_present = 1;
376 break;
377 case WNM_NEIGHBOR_BEARING:
378 if (elen < 8) {
379 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
380 "bearing");
381 break;
382 }
383 rep->bearing = WPA_GET_LE16(pos);
384 rep->distance = WPA_GET_LE32(pos + 2);
385 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
386 rep->bearing_present = 1;
387 break;
388 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
389 if (elen < 1) {
390 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
391 "pilot");
392 break;
393 }
394 os_free(rep->meas_pilot);
395 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
396 if (rep->meas_pilot == NULL)
397 break;
398 rep->meas_pilot->measurement_pilot = pos[0];
399 rep->meas_pilot->subelem_len = elen - 1;
400 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
401 break;
402 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
403 if (elen < 5) {
404 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
405 "capabilities");
406 break;
407 }
408 os_memcpy(rep->rm_capab, pos, 5);
409 rep->rm_capab_present = 1;
410 break;
411 case WNM_NEIGHBOR_MULTIPLE_BSSID:
412 if (elen < 1) {
413 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
414 break;
415 }
416 os_free(rep->mul_bssid);
417 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
418 if (rep->mul_bssid == NULL)
419 break;
420 rep->mul_bssid->max_bssid_indicator = pos[0];
421 rep->mul_bssid->subelem_len = elen - 1;
422 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
423 break;
424 }
425 }
426
427
428 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
429 {
430 struct wpa_bss *bss = wpa_s->current_bss;
431 const char *country = NULL;
432 int freq;
433
434 if (bss) {
435 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
436
437 if (elem && elem[1] >= 2)
438 country = (const char *) (elem + 2);
439 }
440
441 freq = ieee80211_chan_to_freq(country, op_class, chan);
442 if (freq <= 0 && op_class == 0) {
443 /*
444 * Some APs do not advertise correct operating class
445 * information. Try to determine the most likely operating
446 * frequency based on the channel number.
447 */
448 if (chan >= 1 && chan <= 13)
449 freq = 2407 + chan * 5;
450 else if (chan == 14)
451 freq = 2484;
452 else if (chan >= 36 && chan <= 169)
453 freq = 5000 + chan * 5;
454 }
455 return freq;
456 }
457
458
459 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
460 const u8 *pos, u8 len,
461 struct neighbor_report *rep)
462 {
463 u8 left = len;
464
465 if (left < 13) {
466 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
467 return;
468 }
469
470 os_memcpy(rep->bssid, pos, ETH_ALEN);
471 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
472 rep->regulatory_class = *(pos + 10);
473 rep->channel_number = *(pos + 11);
474 rep->phy_type = *(pos + 12);
475
476 pos += 13;
477 left -= 13;
478
479 while (left >= 2) {
480 u8 id, elen;
481
482 id = *pos++;
483 elen = *pos++;
484 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
485 left -= 2;
486 if (elen > left) {
487 wpa_printf(MSG_DEBUG,
488 "WNM: Truncated neighbor report subelement");
489 break;
490 }
491 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
492 left -= elen;
493 pos += elen;
494 }
495
496 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
497 rep->channel_number);
498 }
499
500
501 static struct wpa_bss *
502 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s)
503 {
504
505 u8 i;
506 struct wpa_bss *bss = wpa_s->current_bss;
507 struct wpa_bss *target;
508
509 if (!bss)
510 return 0;
511
512 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
513 MAC2STR(wpa_s->bssid), bss->level);
514
515 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
516 struct neighbor_report *nei;
517
518 nei = &wpa_s->wnm_neighbor_report_elements[i];
519 if (nei->preference_present && nei->preference == 0) {
520 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
521 MAC2STR(nei->bssid));
522 continue;
523 }
524
525 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
526 if (!target) {
527 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
528 " (pref %d) not found in scan results",
529 MAC2STR(nei->bssid),
530 nei->preference_present ? nei->preference :
531 -1);
532 continue;
533 }
534
535 if (bss->ssid_len != target->ssid_len ||
536 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
537 /*
538 * TODO: Could consider allowing transition to another
539 * ESS if PMF was enabled for the association.
540 */
541 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
542 " (pref %d) in different ESS",
543 MAC2STR(nei->bssid),
544 nei->preference_present ? nei->preference :
545 -1);
546 continue;
547 }
548
549 if (wpa_is_bss_tmp_disallowed(wpa_s, target->bssid)) {
550 wpa_printf(MSG_DEBUG,
551 "MBO: Candidate BSS " MACSTR
552 " retry delay is not over yet",
553 MAC2STR(nei->bssid));
554 continue;
555 }
556
557 if (target->level < bss->level && target->level < -80) {
558 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
559 " (pref %d) does not have sufficient signal level (%d)",
560 MAC2STR(nei->bssid),
561 nei->preference_present ? nei->preference :
562 -1,
563 target->level);
564 continue;
565 }
566
567 wpa_printf(MSG_DEBUG,
568 "WNM: Found an acceptable preferred transition candidate BSS "
569 MACSTR " (RSSI %d)",
570 MAC2STR(nei->bssid), target->level);
571 return target;
572 }
573
574 return NULL;
575 }
576
577
578 static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
579 {
580 const u8 *ie_a, *ie_b;
581
582 if (!a || !b)
583 return 0;
584
585 ie_a = wpa_bss_get_ie(a, eid);
586 ie_b = wpa_bss_get_ie(b, eid);
587
588 if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
589 return 0;
590
591 return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
592 }
593
594
595 static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
596 {
597 u32 info = 0;
598
599 info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
600
601 /*
602 * Leave the security and key scope bits unset to indicate that the
603 * security information is not available.
604 */
605
606 if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
607 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
608 if (bss->caps & WLAN_CAPABILITY_QOS)
609 info |= NEI_REP_BSSID_INFO_QOS;
610 if (bss->caps & WLAN_CAPABILITY_APSD)
611 info |= NEI_REP_BSSID_INFO_APSD;
612 if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
613 info |= NEI_REP_BSSID_INFO_RM;
614 if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
615 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
616 if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
617 info |= NEI_REP_BSSID_INFO_IMM_BA;
618 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
619 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
620 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
621 info |= NEI_REP_BSSID_INFO_HT;
622
623 return info;
624 }
625
626
627 static int wnm_add_nei_rep(u8 *buf, size_t len, const u8 *bssid, u32 bss_info,
628 u8 op_class, u8 chan, u8 phy_type, u8 pref)
629 {
630 u8 *pos = buf;
631
632 if (len < 18) {
633 wpa_printf(MSG_DEBUG,
634 "WNM: Not enough room for Neighbor Report element");
635 return -1;
636 }
637
638 *pos++ = WLAN_EID_NEIGHBOR_REPORT;
639 /* length: 13 for basic neighbor report + 3 for preference subelement */
640 *pos++ = 16;
641 os_memcpy(pos, bssid, ETH_ALEN);
642 pos += ETH_ALEN;
643 WPA_PUT_LE32(pos, bss_info);
644 pos += 4;
645 *pos++ = op_class;
646 *pos++ = chan;
647 *pos++ = phy_type;
648 *pos++ = WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE;
649 *pos++ = 1;
650 *pos++ = pref;
651 return pos - buf;
652 }
653
654
655 static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
656 struct wpa_bss *bss, u8 *buf, size_t len,
657 u8 pref)
658 {
659 const u8 *ie;
660 u8 op_class, chan;
661 int sec_chan = 0, vht = 0;
662 enum phy_type phy_type;
663 u32 info;
664 struct ieee80211_ht_operation *ht_oper = NULL;
665 struct ieee80211_vht_operation *vht_oper = NULL;
666
667 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
668 if (ie && ie[1] >= 2) {
669 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
670
671 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
672 sec_chan = 1;
673 else if (ht_oper->ht_param &
674 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
675 sec_chan = -1;
676 }
677
678 ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
679 if (ie && ie[1] >= 1) {
680 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
681
682 if (vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80MHZ ||
683 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_160MHZ ||
684 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80P80MHZ)
685 vht = vht_oper->vht_op_info_chwidth;
686 }
687
688 if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
689 &chan) == NUM_HOSTAPD_MODES) {
690 wpa_printf(MSG_DEBUG,
691 "WNM: Cannot determine operating class and channel");
692 return -2;
693 }
694
695 phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
696 (vht_oper != NULL));
697 if (phy_type == PHY_TYPE_UNSPECIFIED) {
698 wpa_printf(MSG_DEBUG,
699 "WNM: Cannot determine BSS phy type for Neighbor Report");
700 return -2;
701 }
702
703 info = wnm_get_bss_info(wpa_s, bss);
704
705 return wnm_add_nei_rep(buf, len, bss->bssid, info, op_class, chan,
706 phy_type, pref);
707 }
708
709
710 static int wnm_add_cand_list(struct wpa_supplicant *wpa_s, u8 *buf, size_t len)
711 {
712 u8 *pos = buf;
713 unsigned int i, pref = 255;
714 struct os_reltime now;
715 struct wpa_ssid *ssid = wpa_s->current_ssid;
716
717 if (!ssid)
718 return 0;
719
720 /*
721 * TODO: Define when scan results are no longer valid for the candidate
722 * list.
723 */
724 os_get_reltime(&now);
725 if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
726 return 0;
727
728 wpa_printf(MSG_DEBUG,
729 "WNM: Add candidate list to BSS Transition Management Response frame");
730 for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
731 struct wpa_bss *bss = wpa_s->last_scan_res[i];
732 int res;
733
734 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1)) {
735 res = wnm_nei_rep_add_bss(wpa_s, bss, pos, len, pref--);
736 if (res == -2)
737 continue; /* could not build entry for BSS */
738 if (res < 0)
739 break; /* no more room for candidates */
740 if (pref == 1)
741 break;
742
743 pos += res;
744 len -= res;
745 }
746 }
747
748 wpa_hexdump(MSG_DEBUG,
749 "WNM: BSS Transition Management Response candidate list",
750 buf, pos - buf);
751
752 return pos - buf;
753 }
754
755
756 static void wnm_send_bss_transition_mgmt_resp(
757 struct wpa_supplicant *wpa_s, u8 dialog_token,
758 enum bss_trans_mgmt_status_code status, u8 delay,
759 const u8 *target_bssid)
760 {
761 u8 buf[2000], *pos;
762 struct ieee80211_mgmt *mgmt;
763 size_t len;
764 int res;
765
766 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
767 "to " MACSTR " dialog_token=%u status=%u delay=%d",
768 MAC2STR(wpa_s->bssid), dialog_token, status, delay);
769 if (!wpa_s->current_bss) {
770 wpa_printf(MSG_DEBUG,
771 "WNM: Current BSS not known - drop response");
772 return;
773 }
774
775 mgmt = (struct ieee80211_mgmt *) buf;
776 os_memset(&buf, 0, sizeof(buf));
777 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
778 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
779 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
780 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
781 WLAN_FC_STYPE_ACTION);
782 mgmt->u.action.category = WLAN_ACTION_WNM;
783 mgmt->u.action.u.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
784 mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
785 mgmt->u.action.u.bss_tm_resp.status_code = status;
786 mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
787 pos = mgmt->u.action.u.bss_tm_resp.variable;
788 if (target_bssid) {
789 os_memcpy(pos, target_bssid, ETH_ALEN);
790 pos += ETH_ALEN;
791 } else if (status == WNM_BSS_TM_ACCEPT) {
792 /*
793 * P802.11-REVmc clarifies that the Target BSSID field is always
794 * present when status code is zero, so use a fake value here if
795 * no BSSID is yet known.
796 */
797 os_memset(pos, 0, ETH_ALEN);
798 pos += ETH_ALEN;
799 }
800
801 if (status == WNM_BSS_TM_ACCEPT)
802 pos += wnm_add_cand_list(wpa_s, pos, buf + sizeof(buf) - pos);
803
804 #ifdef CONFIG_MBO
805 if (status != WNM_BSS_TM_ACCEPT) {
806 pos += wpas_mbo_ie_bss_trans_reject(
807 wpa_s, pos, buf + sizeof(buf) - pos,
808 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED);
809 }
810 #endif /* CONFIG_MBO */
811
812 len = pos - (u8 *) &mgmt->u.action.category;
813
814 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
815 wpa_s->own_addr, wpa_s->bssid,
816 &mgmt->u.action.category, len, 0);
817 if (res < 0) {
818 wpa_printf(MSG_DEBUG,
819 "WNM: Failed to send BSS Transition Management Response");
820 }
821 }
822
823
824 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
825 {
826 struct wpa_bss *bss;
827 struct wpa_ssid *ssid = wpa_s->current_ssid;
828 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
829
830 if (!wpa_s->wnm_neighbor_report_elements)
831 return 0;
832
833 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
834 &wpa_s->scan_trigger_time)) {
835 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
836 wnm_deallocate_memory(wpa_s);
837 return 0;
838 }
839
840 if (!wpa_s->current_bss ||
841 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
842 ETH_ALEN) != 0) {
843 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
844 return 0;
845 }
846
847 /* Compare the Neighbor Report and scan results */
848 bss = compare_scan_neighbor_results(wpa_s);
849 if (!bss) {
850 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
851 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
852 goto send_bss_resp_fail;
853 }
854
855 /* Associate to the network */
856 /* Send the BSS Management Response - Accept */
857 if (wpa_s->wnm_reply) {
858 wpa_s->wnm_reply = 0;
859 wnm_send_bss_transition_mgmt_resp(wpa_s,
860 wpa_s->wnm_dialog_token,
861 WNM_BSS_TM_ACCEPT,
862 0, bss->bssid);
863 }
864
865 if (bss == wpa_s->current_bss) {
866 wpa_printf(MSG_DEBUG,
867 "WNM: Already associated with the preferred candidate");
868 wnm_deallocate_memory(wpa_s);
869 return 1;
870 }
871
872 wpa_s->reassociate = 1;
873 wpa_supplicant_connect(wpa_s, bss, ssid);
874 wnm_deallocate_memory(wpa_s);
875 return 1;
876
877 send_bss_resp_fail:
878 if (!reply_on_fail)
879 return 0;
880
881 /* Send reject response for all the failures */
882
883 if (wpa_s->wnm_reply) {
884 wpa_s->wnm_reply = 0;
885 wnm_send_bss_transition_mgmt_resp(wpa_s,
886 wpa_s->wnm_dialog_token,
887 status, 0, NULL);
888 }
889 wnm_deallocate_memory(wpa_s);
890
891 return 0;
892 }
893
894
895 static int cand_pref_compar(const void *a, const void *b)
896 {
897 const struct neighbor_report *aa = a;
898 const struct neighbor_report *bb = b;
899
900 if (!aa->preference_present && !bb->preference_present)
901 return 0;
902 if (!aa->preference_present)
903 return 1;
904 if (!bb->preference_present)
905 return -1;
906 if (bb->preference > aa->preference)
907 return 1;
908 if (bb->preference < aa->preference)
909 return -1;
910 return 0;
911 }
912
913
914 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
915 {
916 if (!wpa_s->wnm_neighbor_report_elements)
917 return;
918 qsort(wpa_s->wnm_neighbor_report_elements,
919 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
920 cand_pref_compar);
921 }
922
923
924 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
925 {
926 unsigned int i;
927
928 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
929 if (!wpa_s->wnm_neighbor_report_elements)
930 return;
931 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
932 struct neighbor_report *nei;
933
934 nei = &wpa_s->wnm_neighbor_report_elements[i];
935 wpa_printf(MSG_DEBUG, "%u: " MACSTR
936 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
937 i, MAC2STR(nei->bssid), nei->bssid_info,
938 nei->regulatory_class,
939 nei->channel_number, nei->phy_type,
940 nei->preference_present ? nei->preference : -1,
941 nei->freq);
942 }
943 }
944
945
946 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
947 {
948 unsigned int i;
949
950 for (i = 0; i < wpa_s->hw.num_modes; i++) {
951 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
952 int j;
953
954 for (j = 0; j < mode->num_channels; j++) {
955 struct hostapd_channel_data *chan;
956
957 chan = &mode->channels[j];
958 if (chan->freq == freq &&
959 !(chan->flag & HOSTAPD_CHAN_DISABLED))
960 return 1;
961 }
962 }
963
964 return 0;
965 }
966
967
968 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
969 {
970 int *freqs;
971 int num_freqs = 0;
972 unsigned int i;
973
974 if (!wpa_s->wnm_neighbor_report_elements)
975 return;
976
977 if (wpa_s->hw.modes == NULL)
978 return;
979
980 os_free(wpa_s->next_scan_freqs);
981 wpa_s->next_scan_freqs = NULL;
982
983 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
984 if (freqs == NULL)
985 return;
986
987 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
988 struct neighbor_report *nei;
989
990 nei = &wpa_s->wnm_neighbor_report_elements[i];
991 if (nei->freq <= 0) {
992 wpa_printf(MSG_DEBUG,
993 "WNM: Unknown neighbor operating frequency for "
994 MACSTR " - scan all channels",
995 MAC2STR(nei->bssid));
996 os_free(freqs);
997 return;
998 }
999 if (chan_supported(wpa_s, nei->freq))
1000 add_freq(freqs, &num_freqs, nei->freq);
1001 }
1002
1003 if (num_freqs == 0) {
1004 os_free(freqs);
1005 return;
1006 }
1007
1008 wpa_printf(MSG_DEBUG,
1009 "WNM: Scan %d frequencies based on transition candidate list",
1010 num_freqs);
1011 wpa_s->next_scan_freqs = freqs;
1012 }
1013
1014
1015 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1016 const u8 *pos, const u8 *end,
1017 int reply)
1018 {
1019 unsigned int beacon_int;
1020 u8 valid_int;
1021 #ifdef CONFIG_MBO
1022 const u8 *vendor;
1023 #endif /* CONFIG_MBO */
1024
1025 if (end - pos < 5)
1026 return;
1027
1028 if (wpa_s->current_bss)
1029 beacon_int = wpa_s->current_bss->beacon_int;
1030 else
1031 beacon_int = 100; /* best guess */
1032
1033 wpa_s->wnm_dialog_token = pos[0];
1034 wpa_s->wnm_mode = pos[1];
1035 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
1036 valid_int = pos[4];
1037 wpa_s->wnm_reply = reply;
1038
1039 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1040 "dialog_token=%u request_mode=0x%x "
1041 "disassoc_timer=%u validity_interval=%u",
1042 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
1043 wpa_s->wnm_dissoc_timer, valid_int);
1044
1045 pos += 5;
1046
1047 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
1048 if (end - pos < 12) {
1049 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1050 return;
1051 }
1052 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
1053 pos += 12; /* BSS Termination Duration */
1054 }
1055
1056 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
1057 char url[256];
1058
1059 if (end - pos < 1 || 1 + pos[0] > end - pos) {
1060 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1061 "Management Request (URL)");
1062 return;
1063 }
1064 os_memcpy(url, pos + 1, pos[0]);
1065 url[pos[0]] = '\0';
1066 pos += 1 + pos[0];
1067
1068 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1069 wpa_sm_pmf_enabled(wpa_s->wpa),
1070 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
1071 }
1072
1073 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
1074 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
1075 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1076 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
1077 /* TODO: mark current BSS less preferred for
1078 * selection */
1079 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1080 wpa_supplicant_req_scan(wpa_s, 0, 0);
1081 }
1082 }
1083
1084 #ifdef CONFIG_MBO
1085 vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
1086 if (vendor)
1087 wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
1088 #endif /* CONFIG_MBO */
1089
1090 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
1091 unsigned int valid_ms;
1092
1093 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
1094 wnm_deallocate_memory(wpa_s);
1095 wpa_s->wnm_neighbor_report_elements = os_calloc(
1096 WNM_MAX_NEIGHBOR_REPORT,
1097 sizeof(struct neighbor_report));
1098 if (wpa_s->wnm_neighbor_report_elements == NULL)
1099 return;
1100
1101 while (end - pos >= 2 &&
1102 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1103 {
1104 u8 tag = *pos++;
1105 u8 len = *pos++;
1106
1107 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1108 tag);
1109 if (len > end - pos) {
1110 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1111 return;
1112 }
1113 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1114 struct neighbor_report *rep;
1115 rep = &wpa_s->wnm_neighbor_report_elements[
1116 wpa_s->wnm_num_neighbor_report];
1117 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
1118 }
1119
1120 pos += len;
1121 wpa_s->wnm_num_neighbor_report++;
1122 }
1123 wnm_sort_cand_list(wpa_s);
1124 wnm_dump_cand_list(wpa_s);
1125 valid_ms = valid_int * beacon_int * 128 / 125;
1126 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1127 valid_ms);
1128 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1129 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1130 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1131 wpa_s->wnm_cand_valid_until.sec +=
1132 wpa_s->wnm_cand_valid_until.usec / 1000000;
1133 wpa_s->wnm_cand_valid_until.usec %= 1000000;
1134 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
1135
1136 if (wpa_s->last_scan_res_used > 0) {
1137 struct os_reltime now;
1138
1139 os_get_reltime(&now);
1140 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1141 wpa_printf(MSG_DEBUG,
1142 "WNM: Try to use recent scan results");
1143 if (wnm_scan_process(wpa_s, 0) > 0)
1144 return;
1145 wpa_printf(MSG_DEBUG,
1146 "WNM: No match in previous scan results - try a new scan");
1147 }
1148 }
1149
1150 wnm_set_scan_freqs(wpa_s);
1151 wpa_supplicant_req_scan(wpa_s, 0, 0);
1152 } else if (reply) {
1153 enum bss_trans_mgmt_status_code status;
1154 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1155 status = WNM_BSS_TM_ACCEPT;
1156 else {
1157 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1158 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1159 }
1160 wnm_send_bss_transition_mgmt_resp(wpa_s,
1161 wpa_s->wnm_dialog_token,
1162 status, 0, NULL);
1163 }
1164 }
1165
1166
1167 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
1168 u8 query_reason)
1169 {
1170 u8 buf[1000], *pos;
1171 struct ieee80211_mgmt *mgmt;
1172 size_t len;
1173 int ret;
1174
1175 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
1176 MACSTR " query_reason=%u",
1177 MAC2STR(wpa_s->bssid), query_reason);
1178
1179 mgmt = (struct ieee80211_mgmt *) buf;
1180 os_memset(&buf, 0, sizeof(buf));
1181 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
1182 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
1183 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
1184 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1185 WLAN_FC_STYPE_ACTION);
1186 mgmt->u.action.category = WLAN_ACTION_WNM;
1187 mgmt->u.action.u.bss_tm_query.action = WNM_BSS_TRANS_MGMT_QUERY;
1188 mgmt->u.action.u.bss_tm_query.dialog_token = 1;
1189 mgmt->u.action.u.bss_tm_query.query_reason = query_reason;
1190 pos = mgmt->u.action.u.bss_tm_query.variable;
1191
1192 len = pos - (u8 *) &mgmt->u.action.category;
1193
1194 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1195 wpa_s->own_addr, wpa_s->bssid,
1196 &mgmt->u.action.category, len, 0);
1197
1198 return ret;
1199 }
1200
1201
1202 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1203 const u8 *sa, const u8 *data,
1204 int len)
1205 {
1206 const u8 *pos, *end, *next;
1207 u8 ie, ie_len;
1208
1209 pos = data;
1210 end = data + len;
1211
1212 while (end - pos > 1) {
1213 ie = *pos++;
1214 ie_len = *pos++;
1215 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1216 ie, ie_len);
1217 if (ie_len > end - pos) {
1218 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1219 "subelement");
1220 break;
1221 }
1222 next = pos + ie_len;
1223 if (ie_len < 4) {
1224 pos = next;
1225 continue;
1226 }
1227 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1228 WPA_GET_BE24(pos), pos[3]);
1229
1230 #ifdef CONFIG_HS20
1231 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1232 WPA_GET_BE24(pos) == OUI_WFA &&
1233 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1234 /* Subscription Remediation subelement */
1235 const u8 *ie_end;
1236 u8 url_len;
1237 char *url;
1238 u8 osu_method;
1239
1240 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1241 "subelement");
1242 ie_end = pos + ie_len;
1243 pos += 4;
1244 url_len = *pos++;
1245 if (url_len == 0) {
1246 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1247 url = NULL;
1248 osu_method = 1;
1249 } else {
1250 if (url_len + 1 > ie_end - pos) {
1251 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1252 url_len,
1253 (int) (ie_end - pos));
1254 break;
1255 }
1256 url = os_malloc(url_len + 1);
1257 if (url == NULL)
1258 break;
1259 os_memcpy(url, pos, url_len);
1260 url[url_len] = '\0';
1261 osu_method = pos[url_len];
1262 }
1263 hs20_rx_subscription_remediation(wpa_s, url,
1264 osu_method);
1265 os_free(url);
1266 pos = next;
1267 continue;
1268 }
1269
1270 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1271 WPA_GET_BE24(pos) == OUI_WFA &&
1272 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1273 const u8 *ie_end;
1274 u8 url_len;
1275 char *url;
1276 u8 code;
1277 u16 reauth_delay;
1278
1279 ie_end = pos + ie_len;
1280 pos += 4;
1281 code = *pos++;
1282 reauth_delay = WPA_GET_LE16(pos);
1283 pos += 2;
1284 url_len = *pos++;
1285 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1286 "Imminent - Reason Code %u "
1287 "Re-Auth Delay %u URL Length %u",
1288 code, reauth_delay, url_len);
1289 if (url_len > ie_end - pos)
1290 break;
1291 url = os_malloc(url_len + 1);
1292 if (url == NULL)
1293 break;
1294 os_memcpy(url, pos, url_len);
1295 url[url_len] = '\0';
1296 hs20_rx_deauth_imminent_notice(wpa_s, code,
1297 reauth_delay, url);
1298 os_free(url);
1299 pos = next;
1300 continue;
1301 }
1302 #endif /* CONFIG_HS20 */
1303
1304 pos = next;
1305 }
1306 }
1307
1308
1309 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1310 const u8 *sa, const u8 *frm, int len)
1311 {
1312 const u8 *pos, *end;
1313 u8 dialog_token, type;
1314
1315 /* Dialog Token [1] | Type [1] | Subelements */
1316
1317 if (len < 2 || sa == NULL)
1318 return;
1319 end = frm + len;
1320 pos = frm;
1321 dialog_token = *pos++;
1322 type = *pos++;
1323
1324 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1325 "(dialog_token %u type %u sa " MACSTR ")",
1326 dialog_token, type, MAC2STR(sa));
1327 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1328 pos, end - pos);
1329
1330 if (wpa_s->wpa_state != WPA_COMPLETED ||
1331 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1332 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1333 "from our AP - ignore it");
1334 return;
1335 }
1336
1337 switch (type) {
1338 case 1:
1339 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1340 break;
1341 default:
1342 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1343 "WNM-Notification type %u", type);
1344 break;
1345 }
1346 }
1347
1348
1349 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1350 const struct ieee80211_mgmt *mgmt, size_t len)
1351 {
1352 const u8 *pos, *end;
1353 u8 act;
1354
1355 if (len < IEEE80211_HDRLEN + 2)
1356 return;
1357
1358 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1359 act = *pos++;
1360 end = ((const u8 *) mgmt) + len;
1361
1362 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1363 act, MAC2STR(mgmt->sa));
1364 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1365 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1366 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1367 "frame");
1368 return;
1369 }
1370
1371 switch (act) {
1372 case WNM_BSS_TRANS_MGMT_REQ:
1373 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1374 !(mgmt->da[0] & 0x01));
1375 break;
1376 case WNM_SLEEP_MODE_RESP:
1377 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1378 break;
1379 case WNM_NOTIFICATION_REQ:
1380 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1381 break;
1382 default:
1383 wpa_printf(MSG_ERROR, "WNM: Unknown request");
1384 break;
1385 }
1386 }
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