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 */
ieee80211_11_get_tfs_ie(struct wpa_supplicant * wpa_s,u8 * buf,u16 * buf_len,enum wnm_oper oper)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 */
ieee80211_11_set_tfs_ie(struct wpa_supplicant * wpa_s,const u8 * addr,const u8 * buf,u16 buf_len,enum wnm_oper oper)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 */
ieee802_11_send_wnmsleep_req(struct wpa_supplicant * wpa_s,u8 action,u16 intval,struct wpabuf * tfs_req)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
wnm_sleep_mode_enter_success(struct wpa_supplicant * wpa_s,const u8 * tfsresp_ie_start,const u8 * tfsresp_ie_end)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
wnm_sleep_mode_exit_success(struct wpa_supplicant * wpa_s,const u8 * frm,u16 key_len_total)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 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
275 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
276 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
277 "subelem");
278 break;
279 }
280 wpa_wnmsleep_install_key(wpa_s->wpa,
281 WNM_SLEEP_SUBELEM_IGTK, ptr);
282 ptr += 10 + WPA_IGTK_LEN;
283 } else if (*ptr == WNM_SLEEP_SUBELEM_BIGTK) {
284 if (ptr[1] < 2 + 6 + WPA_BIGTK_LEN) {
285 wpa_printf(MSG_DEBUG,
286 "WNM: Too short BIGTK subelem");
287 break;
288 }
289 wpa_wnmsleep_install_key(wpa_s->wpa,
290 WNM_SLEEP_SUBELEM_BIGTK, ptr);
291 ptr += 10 + WPA_BIGTK_LEN;
292 } else
293 break; /* skip the loop */
294 }
295 }
296
297
ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant * wpa_s,const u8 * frm,int len)298 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
299 const u8 *frm, int len)
300 {
301 /*
302 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
303 * WNM-Sleep Mode IE | TFS Response IE
304 */
305 const u8 *pos = frm; /* point to payload after the action field */
306 u16 key_len_total;
307 struct wnm_sleep_element *wnmsleep_ie = NULL;
308 /* multiple TFS Resp IE (assuming consecutive) */
309 const u8 *tfsresp_ie_start = NULL;
310 const u8 *tfsresp_ie_end = NULL;
311 #ifdef CONFIG_OCV
312 const u8 *oci_ie = NULL;
313 u8 oci_ie_len = 0;
314 #endif /* CONFIG_OCV */
315 size_t left;
316
317 if (!wpa_s->wnmsleep_used) {
318 wpa_printf(MSG_DEBUG,
319 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode operation has not been requested");
320 return;
321 }
322
323 if (len < 3)
324 return;
325 key_len_total = WPA_GET_LE16(frm + 1);
326
327 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
328 frm[0], key_len_total);
329 left = len - 3;
330 if (key_len_total > left) {
331 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
332 return;
333 }
334 pos += 3 + key_len_total;
335 while (pos - frm + 1 < len) {
336 u8 ie_len = *(pos + 1);
337 if (2 + ie_len > frm + len - pos) {
338 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
339 break;
340 }
341 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
342 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
343 wnmsleep_ie = (struct wnm_sleep_element *) pos;
344 else if (*pos == WLAN_EID_TFS_RESP) {
345 if (!tfsresp_ie_start)
346 tfsresp_ie_start = pos;
347 tfsresp_ie_end = pos;
348 #ifdef CONFIG_OCV
349 } else if (*pos == WLAN_EID_EXTENSION && ie_len >= 1 &&
350 pos[2] == WLAN_EID_EXT_OCV_OCI) {
351 oci_ie = pos + 3;
352 oci_ie_len = ie_len - 1;
353 #endif /* CONFIG_OCV */
354 } else
355 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
356 pos += ie_len + 2;
357 }
358
359 if (!wnmsleep_ie) {
360 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
361 return;
362 }
363
364 #ifdef CONFIG_OCV
365 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT &&
366 wpa_sm_ocv_enabled(wpa_s->wpa)) {
367 struct wpa_channel_info ci;
368
369 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
370 wpa_msg(wpa_s, MSG_WARNING,
371 "Failed to get channel info to validate received OCI in WNM-Sleep Mode frame");
372 return;
373 }
374
375 if (ocv_verify_tx_params(oci_ie, oci_ie_len, &ci,
376 channel_width_to_int(ci.chanwidth),
377 ci.seg1_idx) != 0) {
378 wpa_msg(wpa_s, MSG_WARNING, "WNM: %s", ocv_errorstr);
379 return;
380 }
381 }
382 #endif /* CONFIG_OCV */
383
384 wpa_s->wnmsleep_used = 0;
385
386 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
387 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
388 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
389 "frame (action=%d, intval=%d)",
390 wnmsleep_ie->action_type, wnmsleep_ie->intval);
391 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
392 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
393 tfsresp_ie_end);
394 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
395 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
396 }
397 } else {
398 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
399 "(action=%d, intval=%d)",
400 wnmsleep_ie->action_type, wnmsleep_ie->intval);
401 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
402 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
403 wpa_s->bssid, NULL, NULL);
404 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
405 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
406 wpa_s->bssid, NULL, NULL);
407 }
408 }
409
410
wnm_deallocate_memory(struct wpa_supplicant * wpa_s)411 void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
412 {
413 int i;
414
415 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
416 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
417 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
418 }
419
420 wpa_s->wnm_num_neighbor_report = 0;
421 os_free(wpa_s->wnm_neighbor_report_elements);
422 wpa_s->wnm_neighbor_report_elements = NULL;
423
424 wpabuf_free(wpa_s->coloc_intf_elems);
425 wpa_s->coloc_intf_elems = NULL;
426 }
427
428
wnm_parse_neighbor_report_elem(struct neighbor_report * rep,u8 id,u8 elen,const u8 * pos)429 static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
430 u8 id, u8 elen, const u8 *pos)
431 {
432 switch (id) {
433 case WNM_NEIGHBOR_TSF:
434 if (elen < 2 + 2) {
435 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
436 break;
437 }
438 rep->tsf_offset = WPA_GET_LE16(pos);
439 rep->beacon_int = WPA_GET_LE16(pos + 2);
440 rep->tsf_present = 1;
441 break;
442 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
443 if (elen < 2) {
444 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
445 "country string");
446 break;
447 }
448 os_memcpy(rep->country, pos, 2);
449 rep->country_present = 1;
450 break;
451 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
452 if (elen < 1) {
453 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
454 "candidate");
455 break;
456 }
457 rep->preference = pos[0];
458 rep->preference_present = 1;
459 break;
460 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
461 if (elen < 10) {
462 wpa_printf(MSG_DEBUG,
463 "WNM: Too short BSS termination duration");
464 break;
465 }
466 rep->bss_term_tsf = WPA_GET_LE64(pos);
467 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
468 rep->bss_term_present = 1;
469 break;
470 case WNM_NEIGHBOR_BEARING:
471 if (elen < 8) {
472 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
473 "bearing");
474 break;
475 }
476 rep->bearing = WPA_GET_LE16(pos);
477 rep->distance = WPA_GET_LE32(pos + 2);
478 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
479 rep->bearing_present = 1;
480 break;
481 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
482 if (elen < 1) {
483 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
484 "pilot");
485 break;
486 }
487 os_free(rep->meas_pilot);
488 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
489 if (rep->meas_pilot == NULL)
490 break;
491 rep->meas_pilot->measurement_pilot = pos[0];
492 rep->meas_pilot->subelem_len = elen - 1;
493 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
494 break;
495 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
496 if (elen < 5) {
497 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
498 "capabilities");
499 break;
500 }
501 os_memcpy(rep->rm_capab, pos, 5);
502 rep->rm_capab_present = 1;
503 break;
504 case WNM_NEIGHBOR_MULTIPLE_BSSID:
505 if (elen < 1) {
506 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
507 break;
508 }
509 os_free(rep->mul_bssid);
510 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
511 if (rep->mul_bssid == NULL)
512 break;
513 rep->mul_bssid->max_bssid_indicator = pos[0];
514 rep->mul_bssid->subelem_len = elen - 1;
515 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
516 break;
517 }
518 }
519
520
wnm_nei_get_chan(struct wpa_supplicant * wpa_s,u8 op_class,u8 chan)521 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
522 {
523 struct wpa_bss *bss = wpa_s->current_bss;
524 const char *country = NULL;
525 int freq;
526
527 if (bss) {
528 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
529
530 if (elem && elem[1] >= 2)
531 country = (const char *) (elem + 2);
532 }
533
534 freq = ieee80211_chan_to_freq(country, op_class, chan);
535 if (freq <= 0 && op_class == 0) {
536 /*
537 * Some APs do not advertise correct operating class
538 * information. Try to determine the most likely operating
539 * frequency based on the channel number.
540 */
541 if (chan >= 1 && chan <= 13)
542 freq = 2407 + chan * 5;
543 else if (chan == 14)
544 freq = 2484;
545 else if (chan >= 36 && chan <= 169)
546 freq = 5000 + chan * 5;
547 }
548 return freq;
549 }
550
551
wnm_parse_neighbor_report(struct wpa_supplicant * wpa_s,const u8 * pos,u8 len,struct neighbor_report * rep)552 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
553 const u8 *pos, u8 len,
554 struct neighbor_report *rep)
555 {
556 u8 left = len;
557
558 if (left < 13) {
559 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
560 return;
561 }
562
563 os_memcpy(rep->bssid, pos, ETH_ALEN);
564 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
565 rep->regulatory_class = *(pos + 10);
566 rep->channel_number = *(pos + 11);
567 rep->phy_type = *(pos + 12);
568
569 pos += 13;
570 left -= 13;
571
572 while (left >= 2) {
573 u8 id, elen;
574
575 id = *pos++;
576 elen = *pos++;
577 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
578 left -= 2;
579 if (elen > left) {
580 wpa_printf(MSG_DEBUG,
581 "WNM: Truncated neighbor report subelement");
582 break;
583 }
584 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
585 left -= elen;
586 pos += elen;
587 }
588
589 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
590 rep->channel_number);
591 }
592
593
wnm_clear_acceptable(struct wpa_supplicant * wpa_s)594 static void wnm_clear_acceptable(struct wpa_supplicant *wpa_s)
595 {
596 unsigned int i;
597
598 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++)
599 wpa_s->wnm_neighbor_report_elements[i].acceptable = 0;
600 }
601
602
get_first_acceptable(struct wpa_supplicant * wpa_s)603 static struct wpa_bss * get_first_acceptable(struct wpa_supplicant *wpa_s)
604 {
605 unsigned int i;
606 struct neighbor_report *nei;
607
608 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
609 nei = &wpa_s->wnm_neighbor_report_elements[i];
610 if (nei->acceptable)
611 return wpa_bss_get_bssid(wpa_s, nei->bssid);
612 }
613
614 return NULL;
615 }
616
617
618 #ifdef CONFIG_MBO
619 static struct wpa_bss *
get_mbo_transition_candidate(struct wpa_supplicant * wpa_s,enum mbo_transition_reject_reason * reason)620 get_mbo_transition_candidate(struct wpa_supplicant *wpa_s,
621 enum mbo_transition_reject_reason *reason)
622 {
623 struct wpa_bss *target = NULL;
624 struct wpa_bss_trans_info params;
625 struct wpa_bss_candidate_info *info = NULL;
626 struct neighbor_report *nei = wpa_s->wnm_neighbor_report_elements;
627 u8 *first_candidate_bssid = NULL, *pos;
628 unsigned int i;
629
630 params.mbo_transition_reason = wpa_s->wnm_mbo_transition_reason;
631 params.n_candidates = 0;
632 params.bssid = os_calloc(wpa_s->wnm_num_neighbor_report, ETH_ALEN);
633 if (!params.bssid)
634 return NULL;
635
636 pos = params.bssid;
637 for (i = 0; i < wpa_s->wnm_num_neighbor_report; nei++, i++) {
638 if (nei->is_first)
639 first_candidate_bssid = nei->bssid;
640 if (!nei->acceptable)
641 continue;
642 os_memcpy(pos, nei->bssid, ETH_ALEN);
643 pos += ETH_ALEN;
644 params.n_candidates++;
645 }
646
647 if (!params.n_candidates)
648 goto end;
649
650 info = wpa_drv_get_bss_trans_status(wpa_s, ¶ms);
651 if (!info) {
652 /* If failed to get candidate BSS transition status from driver,
653 * get the first acceptable candidate from wpa_supplicant.
654 */
655 target = wpa_bss_get_bssid(wpa_s, params.bssid);
656 goto end;
657 }
658
659 /* Get the first acceptable candidate from driver */
660 for (i = 0; i < info->num; i++) {
661 if (info->candidates[i].is_accept) {
662 target = wpa_bss_get_bssid(wpa_s,
663 info->candidates[i].bssid);
664 goto end;
665 }
666 }
667
668 /* If Disassociation Imminent is set and driver rejects all the
669 * candidate select first acceptable candidate which has
670 * rssi > disassoc_imminent_rssi_threshold
671 */
672 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
673 for (i = 0; i < info->num; i++) {
674 target = wpa_bss_get_bssid(wpa_s,
675 info->candidates[i].bssid);
676 if (target &&
677 (target->level <
678 wpa_s->conf->disassoc_imminent_rssi_threshold))
679 continue;
680 goto end;
681 }
682 }
683
684 /* While sending BTM reject use reason code of the first candidate
685 * received in BTM request frame
686 */
687 if (reason) {
688 for (i = 0; i < info->num; i++) {
689 if (first_candidate_bssid &&
690 os_memcmp(first_candidate_bssid,
691 info->candidates[i].bssid, ETH_ALEN) == 0)
692 {
693 *reason = info->candidates[i].reject_reason;
694 break;
695 }
696 }
697 }
698
699 target = NULL;
700
701 end:
702 os_free(params.bssid);
703 if (info) {
704 os_free(info->candidates);
705 os_free(info);
706 }
707 return target;
708 }
709 #endif /* CONFIG_MBO */
710
711
712 static struct wpa_bss *
compare_scan_neighbor_results(struct wpa_supplicant * wpa_s,os_time_t age_secs,enum mbo_transition_reject_reason * reason)713 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs,
714 enum mbo_transition_reject_reason *reason)
715 {
716 u8 i;
717 struct wpa_bss *bss = wpa_s->current_bss;
718 struct wpa_bss *target;
719
720 if (!bss)
721 return NULL;
722
723 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
724 MAC2STR(wpa_s->bssid), bss->level);
725
726 wnm_clear_acceptable(wpa_s);
727
728 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
729 struct neighbor_report *nei;
730
731 nei = &wpa_s->wnm_neighbor_report_elements[i];
732 if (nei->preference_present && nei->preference == 0) {
733 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
734 MAC2STR(nei->bssid));
735 continue;
736 }
737
738 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
739 if (!target) {
740 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
741 " (pref %d) not found in scan results",
742 MAC2STR(nei->bssid),
743 nei->preference_present ? nei->preference :
744 -1);
745 continue;
746 }
747
748 if (age_secs) {
749 struct os_reltime now;
750
751 if (os_get_reltime(&now) == 0 &&
752 os_reltime_expired(&now, &target->last_update,
753 age_secs)) {
754 wpa_printf(MSG_DEBUG,
755 "Candidate BSS is more than %ld seconds old",
756 age_secs);
757 continue;
758 }
759 }
760
761 if (bss->ssid_len != target->ssid_len ||
762 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
763 /*
764 * TODO: Could consider allowing transition to another
765 * ESS if PMF was enabled for the association.
766 */
767 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
768 " (pref %d) in different ESS",
769 MAC2STR(nei->bssid),
770 nei->preference_present ? nei->preference :
771 -1);
772 continue;
773 }
774
775 if (wpa_s->current_ssid &&
776 !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
777 1, 0)) {
778 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
779 " (pref %d) does not match the current network profile",
780 MAC2STR(nei->bssid),
781 nei->preference_present ? nei->preference :
782 -1);
783 continue;
784 }
785
786 if (wpa_is_bss_tmp_disallowed(wpa_s, target)) {
787 wpa_printf(MSG_DEBUG,
788 "MBO: Candidate BSS " MACSTR
789 " retry delay is not over yet",
790 MAC2STR(nei->bssid));
791 continue;
792 }
793
794 if (target->level < bss->level && target->level < -80) {
795 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
796 " (pref %d) does not have sufficient signal level (%d)",
797 MAC2STR(nei->bssid),
798 nei->preference_present ? nei->preference :
799 -1,
800 target->level);
801 continue;
802 }
803
804 nei->acceptable = 1;
805 }
806
807 #ifdef CONFIG_MBO
808 if (wpa_s->wnm_mbo_trans_reason_present)
809 target = get_mbo_transition_candidate(wpa_s, reason);
810 else
811 target = get_first_acceptable(wpa_s);
812 #else /* CONFIG_MBO */
813 target = get_first_acceptable(wpa_s);
814 #endif /* CONFIG_MBO */
815
816 if (target) {
817 wpa_printf(MSG_DEBUG,
818 "WNM: Found an acceptable preferred transition candidate BSS "
819 MACSTR " (RSSI %d)",
820 MAC2STR(target->bssid), target->level);
821 }
822
823 return target;
824 }
825
826
wpa_bss_ies_eq(struct wpa_bss * a,struct wpa_bss * b,u8 eid)827 static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
828 {
829 const u8 *ie_a, *ie_b;
830
831 if (!a || !b)
832 return 0;
833
834 ie_a = wpa_bss_get_ie(a, eid);
835 ie_b = wpa_bss_get_ie(b, eid);
836
837 if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
838 return 0;
839
840 return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
841 }
842
843
wnm_get_bss_info(struct wpa_supplicant * wpa_s,struct wpa_bss * bss)844 static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
845 {
846 u32 info = 0;
847
848 info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
849
850 /*
851 * Leave the security and key scope bits unset to indicate that the
852 * security information is not available.
853 */
854
855 if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
856 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
857 if (bss->caps & WLAN_CAPABILITY_QOS)
858 info |= NEI_REP_BSSID_INFO_QOS;
859 if (bss->caps & WLAN_CAPABILITY_APSD)
860 info |= NEI_REP_BSSID_INFO_APSD;
861 if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
862 info |= NEI_REP_BSSID_INFO_RM;
863 if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
864 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
865 if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
866 info |= NEI_REP_BSSID_INFO_IMM_BA;
867 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
868 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
869 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
870 info |= NEI_REP_BSSID_INFO_HT;
871
872 return info;
873 }
874
875
wnm_add_nei_rep(struct wpabuf ** buf,const u8 * bssid,u32 bss_info,u8 op_class,u8 chan,u8 phy_type,u8 pref)876 static int wnm_add_nei_rep(struct wpabuf **buf, const u8 *bssid,
877 u32 bss_info, u8 op_class, u8 chan, u8 phy_type,
878 u8 pref)
879 {
880 if (wpabuf_len(*buf) + 18 >
881 IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN) {
882 wpa_printf(MSG_DEBUG,
883 "WNM: No room in frame for Neighbor Report element");
884 return -1;
885 }
886
887 if (wpabuf_resize(buf, 18) < 0) {
888 wpa_printf(MSG_DEBUG,
889 "WNM: Failed to allocate memory for Neighbor Report element");
890 return -1;
891 }
892
893 wpabuf_put_u8(*buf, WLAN_EID_NEIGHBOR_REPORT);
894 /* length: 13 for basic neighbor report + 3 for preference subelement */
895 wpabuf_put_u8(*buf, 16);
896 wpabuf_put_data(*buf, bssid, ETH_ALEN);
897 wpabuf_put_le32(*buf, bss_info);
898 wpabuf_put_u8(*buf, op_class);
899 wpabuf_put_u8(*buf, chan);
900 wpabuf_put_u8(*buf, phy_type);
901 wpabuf_put_u8(*buf, WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE);
902 wpabuf_put_u8(*buf, 1);
903 wpabuf_put_u8(*buf, pref);
904 return 0;
905 }
906
907
wnm_nei_rep_add_bss(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpabuf ** buf,u8 pref)908 static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
909 struct wpa_bss *bss, struct wpabuf **buf,
910 u8 pref)
911 {
912 const u8 *ie;
913 u8 op_class, chan;
914 int sec_chan = 0, vht = 0;
915 enum phy_type phy_type;
916 u32 info;
917 struct ieee80211_ht_operation *ht_oper = NULL;
918 struct ieee80211_vht_operation *vht_oper = NULL;
919
920 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
921 if (ie && ie[1] >= 2) {
922 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
923
924 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
925 sec_chan = 1;
926 else if (ht_oper->ht_param &
927 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
928 sec_chan = -1;
929 }
930
931 ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
932 if (ie && ie[1] >= 1) {
933 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
934
935 if (vht_oper->vht_op_info_chwidth == CHANWIDTH_80MHZ ||
936 vht_oper->vht_op_info_chwidth == CHANWIDTH_160MHZ ||
937 vht_oper->vht_op_info_chwidth == CHANWIDTH_80P80MHZ)
938 vht = vht_oper->vht_op_info_chwidth;
939 }
940
941 if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
942 &chan) == NUM_HOSTAPD_MODES) {
943 wpa_printf(MSG_DEBUG,
944 "WNM: Cannot determine operating class and channel");
945 return -2;
946 }
947
948 phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
949 (vht_oper != NULL));
950 if (phy_type == PHY_TYPE_UNSPECIFIED) {
951 wpa_printf(MSG_DEBUG,
952 "WNM: Cannot determine BSS phy type for Neighbor Report");
953 return -2;
954 }
955
956 info = wnm_get_bss_info(wpa_s, bss);
957
958 return wnm_add_nei_rep(buf, bss->bssid, info, op_class, chan, phy_type,
959 pref);
960 }
961
962
wnm_add_cand_list(struct wpa_supplicant * wpa_s,struct wpabuf ** buf)963 static void wnm_add_cand_list(struct wpa_supplicant *wpa_s, struct wpabuf **buf)
964 {
965 unsigned int i, pref = 255;
966 struct os_reltime now;
967 struct wpa_ssid *ssid = wpa_s->current_ssid;
968
969 if (!ssid)
970 return;
971
972 /*
973 * TODO: Define when scan results are no longer valid for the candidate
974 * list.
975 */
976 os_get_reltime(&now);
977 if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
978 return;
979
980 wpa_printf(MSG_DEBUG,
981 "WNM: Add candidate list to BSS Transition Management Response frame");
982 for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
983 struct wpa_bss *bss = wpa_s->last_scan_res[i];
984 int res;
985
986 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1, 0)) {
987 res = wnm_nei_rep_add_bss(wpa_s, bss, buf, pref--);
988 if (res == -2)
989 continue; /* could not build entry for BSS */
990 if (res < 0)
991 break; /* no more room for candidates */
992 if (pref == 1)
993 break;
994 }
995 }
996
997 wpa_hexdump_buf(MSG_DEBUG,
998 "WNM: BSS Transition Management Response candidate list",
999 *buf);
1000 }
1001
1002
1003 #define BTM_RESP_MIN_SIZE 5 + ETH_ALEN
1004
wnm_send_bss_transition_mgmt_resp(struct wpa_supplicant * wpa_s,u8 dialog_token,enum bss_trans_mgmt_status_code status,enum mbo_transition_reject_reason reason,u8 delay,const u8 * target_bssid)1005 static void wnm_send_bss_transition_mgmt_resp(
1006 struct wpa_supplicant *wpa_s, u8 dialog_token,
1007 enum bss_trans_mgmt_status_code status,
1008 enum mbo_transition_reject_reason reason,
1009 u8 delay, const u8 *target_bssid)
1010 {
1011 struct wpabuf *buf;
1012 int res;
1013
1014 wpa_printf(MSG_DEBUG,
1015 "WNM: Send BSS Transition Management Response to " MACSTR
1016 " dialog_token=%u status=%u reason=%u delay=%d",
1017 MAC2STR(wpa_s->bssid), dialog_token, status, reason, delay);
1018 if (!wpa_s->current_bss) {
1019 wpa_printf(MSG_DEBUG,
1020 "WNM: Current BSS not known - drop response");
1021 return;
1022 }
1023
1024 buf = wpabuf_alloc(BTM_RESP_MIN_SIZE);
1025 if (!buf) {
1026 wpa_printf(MSG_DEBUG,
1027 "WNM: Failed to allocate memory for BTM response");
1028 return;
1029 }
1030
1031 wpa_s->bss_tm_status = status;
1032 wpas_notify_bss_tm_status(wpa_s);
1033
1034 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1035 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_RESP);
1036 wpabuf_put_u8(buf, dialog_token);
1037 wpabuf_put_u8(buf, status);
1038 wpabuf_put_u8(buf, delay);
1039 if (target_bssid) {
1040 wpabuf_put_data(buf, target_bssid, ETH_ALEN);
1041 } else if (status == WNM_BSS_TM_ACCEPT) {
1042 /*
1043 * P802.11-REVmc clarifies that the Target BSSID field is always
1044 * present when status code is zero, so use a fake value here if
1045 * no BSSID is yet known.
1046 */
1047 wpabuf_put_data(buf, "\0\0\0\0\0\0", ETH_ALEN);
1048 }
1049
1050 if (status == WNM_BSS_TM_ACCEPT)
1051 wnm_add_cand_list(wpa_s, &buf);
1052
1053 #ifdef CONFIG_MBO
1054 if (status != WNM_BSS_TM_ACCEPT &&
1055 wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) {
1056 u8 mbo[10];
1057 size_t ret;
1058
1059 ret = wpas_mbo_ie_bss_trans_reject(wpa_s, mbo, sizeof(mbo),
1060 reason);
1061 if (ret) {
1062 if (wpabuf_resize(&buf, ret) < 0) {
1063 wpabuf_free(buf);
1064 wpa_printf(MSG_DEBUG,
1065 "WNM: Failed to allocate memory for MBO IE");
1066 return;
1067 }
1068
1069 wpabuf_put_data(buf, mbo, ret);
1070 }
1071 }
1072 #endif /* CONFIG_MBO */
1073
1074 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1075 wpa_s->own_addr, wpa_s->bssid,
1076 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1077 if (res < 0) {
1078 wpa_printf(MSG_DEBUG,
1079 "WNM: Failed to send BSS Transition Management Response");
1080 }
1081
1082 wpabuf_free(buf);
1083 }
1084
1085
wnm_bss_tm_connect(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid,int after_new_scan)1086 static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
1087 struct wpa_bss *bss, struct wpa_ssid *ssid,
1088 int after_new_scan)
1089 {
1090 wpa_dbg(wpa_s, MSG_DEBUG,
1091 "WNM: Transition to BSS " MACSTR
1092 " based on BSS Transition Management Request (old BSSID "
1093 MACSTR " after_new_scan=%d)",
1094 MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan);
1095
1096 /* Send the BSS Management Response - Accept */
1097 if (wpa_s->wnm_reply) {
1098 wpa_s->wnm_reply = 0;
1099 wpa_printf(MSG_DEBUG,
1100 "WNM: Sending successful BSS Transition Management Response");
1101 wnm_send_bss_transition_mgmt_resp(
1102 wpa_s, wpa_s->wnm_dialog_token, WNM_BSS_TM_ACCEPT,
1103 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1104 bss->bssid);
1105 }
1106
1107 if (bss == wpa_s->current_bss) {
1108 wpa_printf(MSG_DEBUG,
1109 "WNM: Already associated with the preferred candidate");
1110 wnm_deallocate_memory(wpa_s);
1111 return;
1112 }
1113
1114 wpa_s->reassociate = 1;
1115 wpa_printf(MSG_DEBUG, "WNM: Issuing connect");
1116 wpa_supplicant_connect(wpa_s, bss, ssid);
1117 wnm_deallocate_memory(wpa_s);
1118 }
1119
1120
wnm_scan_process(struct wpa_supplicant * wpa_s,int reply_on_fail)1121 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
1122 {
1123 struct wpa_bss *bss;
1124 struct wpa_ssid *ssid = wpa_s->current_ssid;
1125 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1126 enum mbo_transition_reject_reason reason =
1127 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED;
1128
1129 if (!wpa_s->wnm_neighbor_report_elements)
1130 return 0;
1131
1132 wpa_dbg(wpa_s, MSG_DEBUG,
1133 "WNM: Process scan results for BSS Transition Management");
1134 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
1135 &wpa_s->scan_trigger_time)) {
1136 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
1137 wnm_deallocate_memory(wpa_s);
1138 return 0;
1139 }
1140
1141 if (!wpa_s->current_bss ||
1142 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
1143 ETH_ALEN) != 0) {
1144 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
1145 return 0;
1146 }
1147
1148 /* Compare the Neighbor Report and scan results */
1149 bss = compare_scan_neighbor_results(wpa_s, 0, &reason);
1150 if (!bss) {
1151 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
1152 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
1153 goto send_bss_resp_fail;
1154 }
1155
1156 /* Associate to the network */
1157 wnm_bss_tm_connect(wpa_s, bss, ssid, 1);
1158 return 1;
1159
1160 send_bss_resp_fail:
1161 if (!reply_on_fail)
1162 return 0;
1163
1164 /* Send reject response for all the failures */
1165
1166 if (wpa_s->wnm_reply) {
1167 wpa_s->wnm_reply = 0;
1168 wnm_send_bss_transition_mgmt_resp(wpa_s,
1169 wpa_s->wnm_dialog_token,
1170 status, reason, 0, NULL);
1171 }
1172 wnm_deallocate_memory(wpa_s);
1173
1174 return 0;
1175 }
1176
1177
cand_pref_compar(const void * a,const void * b)1178 static int cand_pref_compar(const void *a, const void *b)
1179 {
1180 const struct neighbor_report *aa = a;
1181 const struct neighbor_report *bb = b;
1182
1183 if (!aa->preference_present && !bb->preference_present)
1184 return 0;
1185 if (!aa->preference_present)
1186 return 1;
1187 if (!bb->preference_present)
1188 return -1;
1189 if (bb->preference > aa->preference)
1190 return 1;
1191 if (bb->preference < aa->preference)
1192 return -1;
1193 return 0;
1194 }
1195
1196
wnm_sort_cand_list(struct wpa_supplicant * wpa_s)1197 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
1198 {
1199 if (!wpa_s->wnm_neighbor_report_elements)
1200 return;
1201 qsort(wpa_s->wnm_neighbor_report_elements,
1202 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
1203 cand_pref_compar);
1204 }
1205
1206
wnm_dump_cand_list(struct wpa_supplicant * wpa_s)1207 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
1208 {
1209 unsigned int i;
1210
1211 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
1212 if (!wpa_s->wnm_neighbor_report_elements)
1213 return;
1214 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1215 struct neighbor_report *nei;
1216
1217 nei = &wpa_s->wnm_neighbor_report_elements[i];
1218 wpa_printf(MSG_DEBUG, "%u: " MACSTR
1219 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
1220 i, MAC2STR(nei->bssid), nei->bssid_info,
1221 nei->regulatory_class,
1222 nei->channel_number, nei->phy_type,
1223 nei->preference_present ? nei->preference : -1,
1224 nei->freq);
1225 }
1226 }
1227
1228
chan_supported(struct wpa_supplicant * wpa_s,int freq)1229 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
1230 {
1231 unsigned int i;
1232
1233 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1234 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
1235 int j;
1236
1237 for (j = 0; j < mode->num_channels; j++) {
1238 struct hostapd_channel_data *chan;
1239
1240 chan = &mode->channels[j];
1241 if (chan->freq == freq &&
1242 !(chan->flag & HOSTAPD_CHAN_DISABLED))
1243 return 1;
1244 }
1245 }
1246
1247 return 0;
1248 }
1249
1250
wnm_set_scan_freqs(struct wpa_supplicant * wpa_s)1251 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
1252 {
1253 int *freqs;
1254 int num_freqs = 0;
1255 unsigned int i;
1256
1257 if (!wpa_s->wnm_neighbor_report_elements)
1258 return;
1259
1260 if (wpa_s->hw.modes == NULL)
1261 return;
1262
1263 os_free(wpa_s->next_scan_freqs);
1264 wpa_s->next_scan_freqs = NULL;
1265
1266 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
1267 if (freqs == NULL)
1268 return;
1269
1270 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1271 struct neighbor_report *nei;
1272
1273 nei = &wpa_s->wnm_neighbor_report_elements[i];
1274 if (nei->freq <= 0) {
1275 wpa_printf(MSG_DEBUG,
1276 "WNM: Unknown neighbor operating frequency for "
1277 MACSTR " - scan all channels",
1278 MAC2STR(nei->bssid));
1279 os_free(freqs);
1280 return;
1281 }
1282 if (chan_supported(wpa_s, nei->freq))
1283 add_freq(freqs, &num_freqs, nei->freq);
1284 }
1285
1286 if (num_freqs == 0) {
1287 os_free(freqs);
1288 return;
1289 }
1290
1291 wpa_printf(MSG_DEBUG,
1292 "WNM: Scan %d frequencies based on transition candidate list",
1293 num_freqs);
1294 wpa_s->next_scan_freqs = freqs;
1295 }
1296
1297
wnm_fetch_scan_results(struct wpa_supplicant * wpa_s)1298 static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
1299 {
1300 struct wpa_scan_results *scan_res;
1301 struct wpa_bss *bss;
1302 struct wpa_ssid *ssid = wpa_s->current_ssid;
1303 u8 i, found = 0;
1304 size_t j;
1305
1306 wpa_dbg(wpa_s, MSG_DEBUG,
1307 "WNM: Fetch current scan results from the driver for checking transition candidates");
1308 scan_res = wpa_drv_get_scan_results2(wpa_s);
1309 if (!scan_res) {
1310 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
1311 return 0;
1312 }
1313
1314 if (scan_res->fetch_time.sec == 0)
1315 os_get_reltime(&scan_res->fetch_time);
1316
1317 filter_scan_res(wpa_s, scan_res);
1318
1319 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1320 struct neighbor_report *nei;
1321
1322 nei = &wpa_s->wnm_neighbor_report_elements[i];
1323 if (nei->preference_present && nei->preference == 0)
1324 continue;
1325
1326 for (j = 0; j < scan_res->num; j++) {
1327 struct wpa_scan_res *res;
1328 const u8 *ssid_ie;
1329
1330 res = scan_res->res[j];
1331 if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
1332 res->age > WNM_SCAN_RESULT_AGE * 1000)
1333 continue;
1334 bss = wpa_s->current_bss;
1335 ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
1336 if (bss && ssid_ie &&
1337 (bss->ssid_len != ssid_ie[1] ||
1338 os_memcmp(bss->ssid, ssid_ie + 2,
1339 bss->ssid_len) != 0))
1340 continue;
1341
1342 /* Potential candidate found */
1343 found = 1;
1344 scan_snr(res);
1345 scan_est_throughput(wpa_s, res);
1346 wpa_bss_update_scan_res(wpa_s, res,
1347 &scan_res->fetch_time);
1348 }
1349 }
1350
1351 wpa_scan_results_free(scan_res);
1352 if (!found) {
1353 wpa_dbg(wpa_s, MSG_DEBUG,
1354 "WNM: No transition candidate matches existing scan results");
1355 return 0;
1356 }
1357
1358 bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL);
1359 if (!bss) {
1360 wpa_dbg(wpa_s, MSG_DEBUG,
1361 "WNM: Comparison of scan results against transition candidates did not find matches");
1362 return 0;
1363 }
1364
1365 /* Associate to the network */
1366 wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
1367 return 1;
1368 }
1369
1370
ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant * wpa_s,const u8 * pos,const u8 * end,int reply)1371 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1372 const u8 *pos, const u8 *end,
1373 int reply)
1374 {
1375 unsigned int beacon_int;
1376 u8 valid_int;
1377 #ifdef CONFIG_MBO
1378 const u8 *vendor;
1379 #endif /* CONFIG_MBO */
1380
1381 if (wpa_s->disable_mbo_oce || wpa_s->conf->disable_btm)
1382 return;
1383
1384 if (end - pos < 5)
1385 return;
1386
1387 #ifdef CONFIG_MBO
1388 wpa_s->wnm_mbo_trans_reason_present = 0;
1389 wpa_s->wnm_mbo_transition_reason = 0;
1390 wpa_s->wnm_mbo_cell_pref_present = 0;
1391 wpa_s->wnm_mbo_cell_preference = 0;
1392 wpa_s->wnm_mbo_assoc_retry_delay_present = 0;
1393 wpa_s->wnm_mbo_assoc_retry_delay_sec = 0;
1394 #endif /* CONFIG_MBO */
1395
1396 if (wpa_s->current_bss)
1397 beacon_int = wpa_s->current_bss->beacon_int;
1398 else
1399 beacon_int = 100; /* best guess */
1400
1401 wpa_s->wnm_dialog_token = pos[0];
1402 wpa_s->wnm_mode = pos[1];
1403 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
1404 valid_int = pos[4];
1405 wpa_s->wnm_reply = reply;
1406
1407 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1408 "dialog_token=%u request_mode=0x%x "
1409 "disassoc_timer=%u validity_interval=%u",
1410 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
1411 wpa_s->wnm_dissoc_timer, valid_int);
1412
1413 #if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS)
1414 if (wpa_s->reject_btm_req_reason) {
1415 wpa_printf(MSG_INFO,
1416 "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d",
1417 wpa_s->reject_btm_req_reason);
1418 wnm_send_bss_transition_mgmt_resp(
1419 wpa_s, wpa_s->wnm_dialog_token,
1420 wpa_s->reject_btm_req_reason,
1421 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1422 return;
1423 }
1424 #endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */
1425
1426 pos += 5;
1427
1428 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
1429 if (end - pos < 12) {
1430 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1431 return;
1432 }
1433 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
1434 pos += 12; /* BSS Termination Duration */
1435 }
1436
1437 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
1438 char url[256];
1439
1440 if (end - pos < 1 || 1 + pos[0] > end - pos) {
1441 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1442 "Management Request (URL)");
1443 return;
1444 }
1445 os_memcpy(url, pos + 1, pos[0]);
1446 url[pos[0]] = '\0';
1447 pos += 1 + pos[0];
1448
1449 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1450 wpa_sm_pmf_enabled(wpa_s->wpa),
1451 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
1452 }
1453
1454 #ifdef CONFIG_MBO
1455 vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
1456 if (vendor) {
1457 wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
1458 if (wpa_s->conf->btm_offload) {
1459 wpa_msg(wpa_s, MSG_INFO,
1460 "WNM: Notify BSS Transition Management Request frame status");
1461 wpa_s->bss_tm_status = WNM_BSS_TM_ACCEPT;
1462 wpas_notify_bss_tm_status(wpa_s);
1463 /* since it could be referenced in the scan result logic, initialize it */
1464 wpa_s->wnm_mbo_trans_reason_present = 0;
1465 return;
1466 }
1467 }
1468 #endif /* CONFIG_MBO */
1469
1470 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
1471 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
1472 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1473 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
1474 /* TODO: mark current BSS less preferred for
1475 * selection */
1476 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1477 wpa_supplicant_req_scan(wpa_s, 0, 0);
1478 }
1479 }
1480
1481 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
1482 unsigned int valid_ms;
1483
1484 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
1485 wnm_deallocate_memory(wpa_s);
1486 wpa_s->wnm_neighbor_report_elements = os_calloc(
1487 WNM_MAX_NEIGHBOR_REPORT,
1488 sizeof(struct neighbor_report));
1489 if (wpa_s->wnm_neighbor_report_elements == NULL)
1490 return;
1491
1492 while (end - pos >= 2 &&
1493 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1494 {
1495 u8 tag = *pos++;
1496 u8 len = *pos++;
1497
1498 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1499 tag);
1500 if (len > end - pos) {
1501 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1502 return;
1503 }
1504 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1505 struct neighbor_report *rep;
1506 rep = &wpa_s->wnm_neighbor_report_elements[
1507 wpa_s->wnm_num_neighbor_report];
1508 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
1509 wpa_s->wnm_num_neighbor_report++;
1510 #ifdef CONFIG_MBO
1511 if (wpa_s->wnm_mbo_trans_reason_present &&
1512 wpa_s->wnm_num_neighbor_report == 1) {
1513 rep->is_first = 1;
1514 wpa_printf(MSG_DEBUG,
1515 "WNM: First transition candidate is "
1516 MACSTR, MAC2STR(rep->bssid));
1517 }
1518 #endif /* CONFIG_MBO */
1519 }
1520
1521 pos += len;
1522 }
1523
1524 if (!wpa_s->wnm_num_neighbor_report) {
1525 wpa_printf(MSG_DEBUG,
1526 "WNM: Candidate list included bit is set, but no candidates found");
1527 wnm_send_bss_transition_mgmt_resp(
1528 wpa_s, wpa_s->wnm_dialog_token,
1529 WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
1530 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1531 NULL);
1532 return;
1533 }
1534
1535 wnm_sort_cand_list(wpa_s);
1536 wnm_dump_cand_list(wpa_s);
1537 valid_ms = valid_int * beacon_int * 128 / 125;
1538 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1539 valid_ms);
1540 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1541 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1542 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1543 wpa_s->wnm_cand_valid_until.sec +=
1544 wpa_s->wnm_cand_valid_until.usec / 1000000;
1545 wpa_s->wnm_cand_valid_until.usec %= 1000000;
1546 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
1547
1548 /*
1549 * Fetch the latest scan results from the kernel and check for
1550 * candidates based on those results first. This can help in
1551 * finding more up-to-date information should the driver has
1552 * done some internal scanning operations after the last scan
1553 * result update in wpa_supplicant.
1554 */
1555 if (wnm_fetch_scan_results(wpa_s) > 0)
1556 return;
1557
1558 /*
1559 * Try to use previously received scan results, if they are
1560 * recent enough to use for a connection.
1561 */
1562 if (wpa_s->last_scan_res_used > 0) {
1563 struct os_reltime now;
1564
1565 os_get_reltime(&now);
1566 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1567 wpa_printf(MSG_DEBUG,
1568 "WNM: Try to use recent scan results");
1569 if (wnm_scan_process(wpa_s, 0) > 0)
1570 return;
1571 wpa_printf(MSG_DEBUG,
1572 "WNM: No match in previous scan results - try a new scan");
1573 }
1574 }
1575
1576 wnm_set_scan_freqs(wpa_s);
1577 if (wpa_s->wnm_num_neighbor_report == 1) {
1578 os_memcpy(wpa_s->next_scan_bssid,
1579 wpa_s->wnm_neighbor_report_elements[0].bssid,
1580 ETH_ALEN);
1581 wpa_printf(MSG_DEBUG,
1582 "WNM: Scan only for a specific BSSID since there is only a single candidate "
1583 MACSTR, MAC2STR(wpa_s->next_scan_bssid));
1584 }
1585 wpa_supplicant_req_scan(wpa_s, 0, 0);
1586 } else if (reply) {
1587 enum bss_trans_mgmt_status_code status;
1588 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1589 status = WNM_BSS_TM_ACCEPT;
1590 else {
1591 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1592 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1593 }
1594 wnm_send_bss_transition_mgmt_resp(
1595 wpa_s, wpa_s->wnm_dialog_token, status,
1596 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1597 }
1598 }
1599
1600
1601 #define BTM_QUERY_MIN_SIZE 4
1602
wnm_send_bss_transition_mgmt_query(struct wpa_supplicant * wpa_s,u8 query_reason,const char * btm_candidates,int cand_list)1603 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
1604 u8 query_reason,
1605 const char *btm_candidates,
1606 int cand_list)
1607 {
1608 struct wpabuf *buf;
1609 int ret;
1610
1611 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
1612 MACSTR " query_reason=%u%s",
1613 MAC2STR(wpa_s->bssid), query_reason,
1614 cand_list ? " candidate list" : "");
1615
1616 buf = wpabuf_alloc(BTM_QUERY_MIN_SIZE);
1617 if (!buf)
1618 return -1;
1619
1620 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1621 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_QUERY);
1622 wpabuf_put_u8(buf, 1);
1623 wpabuf_put_u8(buf, query_reason);
1624
1625 if (cand_list)
1626 wnm_add_cand_list(wpa_s, &buf);
1627
1628 if (btm_candidates) {
1629 const size_t max_len = 1000;
1630
1631 ret = wpabuf_resize(&buf, max_len);
1632 if (ret < 0) {
1633 wpabuf_free(buf);
1634 return ret;
1635 }
1636
1637 ret = ieee802_11_parse_candidate_list(btm_candidates,
1638 wpabuf_put(buf, 0),
1639 max_len);
1640 if (ret < 0) {
1641 wpabuf_free(buf);
1642 return ret;
1643 }
1644
1645 wpabuf_put(buf, ret);
1646 }
1647
1648 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1649 wpa_s->own_addr, wpa_s->bssid,
1650 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1651
1652 wpabuf_free(buf);
1653 return ret;
1654 }
1655
1656
ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * data,int len)1657 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1658 const u8 *sa, const u8 *data,
1659 int len)
1660 {
1661 const u8 *pos, *end, *next;
1662 u8 ie, ie_len;
1663
1664 pos = data;
1665 end = data + len;
1666
1667 while (end - pos > 1) {
1668 ie = *pos++;
1669 ie_len = *pos++;
1670 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1671 ie, ie_len);
1672 if (ie_len > end - pos) {
1673 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1674 "subelement");
1675 break;
1676 }
1677 next = pos + ie_len;
1678 if (ie_len < 4) {
1679 pos = next;
1680 continue;
1681 }
1682 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1683 WPA_GET_BE24(pos), pos[3]);
1684
1685 #ifdef CONFIG_HS20
1686 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1687 WPA_GET_BE24(pos) == OUI_WFA &&
1688 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1689 /* Subscription Remediation subelement */
1690 const u8 *ie_end;
1691 u8 url_len;
1692 char *url;
1693 u8 osu_method;
1694
1695 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1696 "subelement");
1697 ie_end = pos + ie_len;
1698 pos += 4;
1699 url_len = *pos++;
1700 if (url_len == 0) {
1701 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1702 url = NULL;
1703 osu_method = 1;
1704 } else {
1705 if (url_len + 1 > ie_end - pos) {
1706 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1707 url_len,
1708 (int) (ie_end - pos));
1709 break;
1710 }
1711 url = os_malloc(url_len + 1);
1712 if (url == NULL)
1713 break;
1714 os_memcpy(url, pos, url_len);
1715 url[url_len] = '\0';
1716 osu_method = pos[url_len];
1717 }
1718 hs20_rx_subscription_remediation(wpa_s, url,
1719 osu_method);
1720 os_free(url);
1721 pos = next;
1722 continue;
1723 }
1724
1725 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1726 WPA_GET_BE24(pos) == OUI_WFA &&
1727 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1728 const u8 *ie_end;
1729 u8 url_len;
1730 char *url;
1731 u8 code;
1732 u16 reauth_delay;
1733
1734 ie_end = pos + ie_len;
1735 pos += 4;
1736 code = *pos++;
1737 reauth_delay = WPA_GET_LE16(pos);
1738 pos += 2;
1739 url_len = *pos++;
1740 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1741 "Imminent - Reason Code %u "
1742 "Re-Auth Delay %u URL Length %u",
1743 code, reauth_delay, url_len);
1744 if (url_len > ie_end - pos)
1745 break;
1746 url = os_malloc(url_len + 1);
1747 if (url == NULL)
1748 break;
1749 os_memcpy(url, pos, url_len);
1750 url[url_len] = '\0';
1751 hs20_rx_deauth_imminent_notice(wpa_s, code,
1752 reauth_delay, url);
1753 os_free(url);
1754 pos = next;
1755 continue;
1756 }
1757
1758 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1759 WPA_GET_BE24(pos) == OUI_WFA &&
1760 pos[3] == HS20_WNM_T_C_ACCEPTANCE) {
1761 const u8 *ie_end;
1762 u8 url_len;
1763 char *url;
1764
1765 ie_end = pos + ie_len;
1766 pos += 4;
1767 url_len = *pos++;
1768 wpa_printf(MSG_DEBUG,
1769 "WNM: HS 2.0 Terms and Conditions Acceptance (URL Length %u)",
1770 url_len);
1771 if (url_len > ie_end - pos)
1772 break;
1773 url = os_malloc(url_len + 1);
1774 if (!url)
1775 break;
1776 os_memcpy(url, pos, url_len);
1777 url[url_len] = '\0';
1778 hs20_rx_t_c_acceptance(wpa_s, url);
1779 os_free(url);
1780 pos = next;
1781 continue;
1782 }
1783 #endif /* CONFIG_HS20 */
1784
1785 pos = next;
1786 }
1787 }
1788
1789
ieee802_11_rx_wnm_notif_req(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * frm,int len)1790 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1791 const u8 *sa, const u8 *frm, int len)
1792 {
1793 const u8 *pos, *end;
1794 u8 dialog_token, type;
1795
1796 /* Dialog Token [1] | Type [1] | Subelements */
1797
1798 if (len < 2 || sa == NULL)
1799 return;
1800 end = frm + len;
1801 pos = frm;
1802 dialog_token = *pos++;
1803 type = *pos++;
1804
1805 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1806 "(dialog_token %u type %u sa " MACSTR ")",
1807 dialog_token, type, MAC2STR(sa));
1808 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1809 pos, end - pos);
1810
1811 if (wpa_s->wpa_state != WPA_COMPLETED ||
1812 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1813 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1814 "from our AP - ignore it");
1815 return;
1816 }
1817
1818 switch (type) {
1819 case 1:
1820 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1821 break;
1822 default:
1823 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1824 "WNM-Notification type %u", type);
1825 break;
1826 }
1827 }
1828
1829
ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * frm,int len)1830 static void ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant *wpa_s,
1831 const u8 *sa, const u8 *frm,
1832 int len)
1833 {
1834 u8 dialog_token, req_info, auto_report, timeout;
1835
1836 if (!wpa_s->conf->coloc_intf_reporting)
1837 return;
1838
1839 /* Dialog Token [1] | Request Info [1] */
1840
1841 if (len < 2)
1842 return;
1843 dialog_token = frm[0];
1844 req_info = frm[1];
1845 auto_report = req_info & 0x03;
1846 timeout = req_info >> 2;
1847
1848 wpa_dbg(wpa_s, MSG_DEBUG,
1849 "WNM: Received Collocated Interference Request (dialog_token %u auto_report %u timeout %u sa " MACSTR ")",
1850 dialog_token, auto_report, timeout, MAC2STR(sa));
1851
1852 if (dialog_token == 0)
1853 return; /* only nonzero values are used for request */
1854
1855 if (wpa_s->wpa_state != WPA_COMPLETED ||
1856 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1857 wpa_dbg(wpa_s, MSG_DEBUG,
1858 "WNM: Collocated Interference Request frame not from current AP - ignore it");
1859 return;
1860 }
1861
1862 wpa_msg(wpa_s, MSG_INFO, COLOC_INTF_REQ "%u %u %u",
1863 dialog_token, auto_report, timeout);
1864 wpa_s->coloc_intf_dialog_token = dialog_token;
1865 wpa_s->coloc_intf_auto_report = auto_report;
1866 wpa_s->coloc_intf_timeout = timeout;
1867 }
1868
1869
ieee802_11_rx_wnm_action(struct wpa_supplicant * wpa_s,const struct ieee80211_mgmt * mgmt,size_t len)1870 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1871 const struct ieee80211_mgmt *mgmt, size_t len)
1872 {
1873 const u8 *pos, *end;
1874 u8 act;
1875
1876 if (len < IEEE80211_HDRLEN + 2)
1877 return;
1878
1879 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1880 act = *pos++;
1881 end = ((const u8 *) mgmt) + len;
1882
1883 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1884 act, MAC2STR(mgmt->sa));
1885 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1886 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1887 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1888 "frame");
1889 return;
1890 }
1891
1892 switch (act) {
1893 case WNM_BSS_TRANS_MGMT_REQ:
1894 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1895 !(mgmt->da[0] & 0x01));
1896 break;
1897 case WNM_SLEEP_MODE_RESP:
1898 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1899 break;
1900 case WNM_NOTIFICATION_REQ:
1901 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1902 break;
1903 case WNM_COLLOCATED_INTERFERENCE_REQ:
1904 ieee802_11_rx_wnm_coloc_intf_req(wpa_s, mgmt->sa, pos,
1905 end - pos);
1906 break;
1907 default:
1908 wpa_printf(MSG_ERROR, "WNM: Unknown request");
1909 break;
1910 }
1911 }
1912
1913
wnm_send_coloc_intf_report(struct wpa_supplicant * wpa_s,u8 dialog_token,const struct wpabuf * elems)1914 int wnm_send_coloc_intf_report(struct wpa_supplicant *wpa_s, u8 dialog_token,
1915 const struct wpabuf *elems)
1916 {
1917 struct wpabuf *buf;
1918 int ret;
1919
1920 if (wpa_s->wpa_state < WPA_ASSOCIATED || !elems)
1921 return -1;
1922
1923 wpa_printf(MSG_DEBUG, "WNM: Send Collocated Interference Report to "
1924 MACSTR " (dialog token %u)",
1925 MAC2STR(wpa_s->bssid), dialog_token);
1926
1927 buf = wpabuf_alloc(3 + wpabuf_len(elems));
1928 if (!buf)
1929 return -1;
1930
1931 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1932 wpabuf_put_u8(buf, WNM_COLLOCATED_INTERFERENCE_REPORT);
1933 wpabuf_put_u8(buf, dialog_token);
1934 wpabuf_put_buf(buf, elems);
1935
1936 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1937 wpa_s->own_addr, wpa_s->bssid,
1938 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1939 wpabuf_free(buf);
1940 return ret;
1941 }
1942
1943
wnm_set_coloc_intf_elems(struct wpa_supplicant * wpa_s,struct wpabuf * elems)1944 void wnm_set_coloc_intf_elems(struct wpa_supplicant *wpa_s,
1945 struct wpabuf *elems)
1946 {
1947 wpabuf_free(wpa_s->coloc_intf_elems);
1948 if (elems && wpabuf_len(elems) == 0) {
1949 wpabuf_free(elems);
1950 elems = NULL;
1951 }
1952 wpa_s->coloc_intf_elems = elems;
1953
1954 if (wpa_s->conf->coloc_intf_reporting && wpa_s->coloc_intf_elems &&
1955 wpa_s->coloc_intf_dialog_token &&
1956 (wpa_s->coloc_intf_auto_report == 1 ||
1957 wpa_s->coloc_intf_auto_report == 3)) {
1958 /* TODO: Check that there has not been less than
1959 * wpa_s->coloc_intf_timeout * 200 TU from the last report.
1960 */
1961 wnm_send_coloc_intf_report(wpa_s,
1962 wpa_s->coloc_intf_dialog_token,
1963 wpa_s->coloc_intf_elems);
1964 }
1965 }
1966
1967
wnm_clear_coloc_intf_reporting(struct wpa_supplicant * wpa_s)1968 void wnm_clear_coloc_intf_reporting(struct wpa_supplicant *wpa_s)
1969 {
1970 #ifdef CONFIG_WNM
1971 wpa_s->coloc_intf_dialog_token = 0;
1972 wpa_s->coloc_intf_auto_report = 0;
1973 #endif /* CONFIG_WNM */
1974 }
1975