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 #ifdef CONFIG_IEEE80211W
275 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
276 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
277 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
278 "subelem");
279 break;
280 }
281 wpa_wnmsleep_install_key(wpa_s->wpa,
282 WNM_SLEEP_SUBELEM_IGTK, ptr);
283 ptr += 10 + WPA_IGTK_LEN;
284 #endif /* CONFIG_IEEE80211W */
285 } else
286 break; /* skip the loop */
287 }
288 }
289
290
ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant * wpa_s,const u8 * frm,int len)291 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
292 const u8 *frm, int len)
293 {
294 /*
295 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
296 * WNM-Sleep Mode IE | TFS Response IE
297 */
298 const u8 *pos = frm; /* point to payload after the action field */
299 u16 key_len_total;
300 struct wnm_sleep_element *wnmsleep_ie = NULL;
301 /* multiple TFS Resp IE (assuming consecutive) */
302 const u8 *tfsresp_ie_start = NULL;
303 const u8 *tfsresp_ie_end = NULL;
304 #ifdef CONFIG_OCV
305 const u8 *oci_ie = NULL;
306 u8 oci_ie_len = 0;
307 #endif /* CONFIG_OCV */
308 size_t left;
309
310 if (!wpa_s->wnmsleep_used) {
311 wpa_printf(MSG_DEBUG,
312 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode operation has not been requested");
313 return;
314 }
315
316 if (len < 3)
317 return;
318 key_len_total = WPA_GET_LE16(frm + 1);
319
320 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
321 frm[0], key_len_total);
322 left = len - 3;
323 if (key_len_total > left) {
324 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
325 return;
326 }
327 pos += 3 + key_len_total;
328 while (pos - frm + 1 < len) {
329 u8 ie_len = *(pos + 1);
330 if (2 + ie_len > frm + len - pos) {
331 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
332 break;
333 }
334 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
335 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
336 wnmsleep_ie = (struct wnm_sleep_element *) pos;
337 else if (*pos == WLAN_EID_TFS_RESP) {
338 if (!tfsresp_ie_start)
339 tfsresp_ie_start = pos;
340 tfsresp_ie_end = pos;
341 #ifdef CONFIG_OCV
342 } else if (*pos == WLAN_EID_EXTENSION && ie_len >= 1 &&
343 pos[2] == WLAN_EID_EXT_OCV_OCI) {
344 oci_ie = pos + 3;
345 oci_ie_len = ie_len - 1;
346 #endif /* CONFIG_OCV */
347 } else
348 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
349 pos += ie_len + 2;
350 }
351
352 if (!wnmsleep_ie) {
353 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
354 return;
355 }
356
357 #ifdef CONFIG_OCV
358 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT &&
359 wpa_sm_ocv_enabled(wpa_s->wpa)) {
360 struct wpa_channel_info ci;
361
362 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
363 wpa_msg(wpa_s, MSG_WARNING,
364 "Failed to get channel info to validate received OCI in WNM-Sleep Mode frame");
365 return;
366 }
367
368 if (ocv_verify_tx_params(oci_ie, oci_ie_len, &ci,
369 channel_width_to_int(ci.chanwidth),
370 ci.seg1_idx) != 0) {
371 wpa_msg(wpa_s, MSG_WARNING, "WNM: %s", ocv_errorstr);
372 return;
373 }
374 }
375 #endif /* CONFIG_OCV */
376
377 wpa_s->wnmsleep_used = 0;
378
379 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
380 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
381 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
382 "frame (action=%d, intval=%d)",
383 wnmsleep_ie->action_type, wnmsleep_ie->intval);
384 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
385 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
386 tfsresp_ie_end);
387 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
388 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
389 }
390 } else {
391 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
392 "(action=%d, intval=%d)",
393 wnmsleep_ie->action_type, wnmsleep_ie->intval);
394 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
395 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
396 wpa_s->bssid, NULL, NULL);
397 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
398 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
399 wpa_s->bssid, NULL, NULL);
400 }
401 }
402
403
wnm_deallocate_memory(struct wpa_supplicant * wpa_s)404 void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
405 {
406 int i;
407
408 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
409 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
410 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
411 }
412
413 wpa_s->wnm_num_neighbor_report = 0;
414 os_free(wpa_s->wnm_neighbor_report_elements);
415 wpa_s->wnm_neighbor_report_elements = NULL;
416
417 wpabuf_free(wpa_s->coloc_intf_elems);
418 wpa_s->coloc_intf_elems = NULL;
419 }
420
421
wnm_parse_neighbor_report_elem(struct neighbor_report * rep,u8 id,u8 elen,const u8 * pos)422 static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
423 u8 id, u8 elen, const u8 *pos)
424 {
425 switch (id) {
426 case WNM_NEIGHBOR_TSF:
427 if (elen < 2 + 2) {
428 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
429 break;
430 }
431 rep->tsf_offset = WPA_GET_LE16(pos);
432 rep->beacon_int = WPA_GET_LE16(pos + 2);
433 rep->tsf_present = 1;
434 break;
435 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
436 if (elen < 2) {
437 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
438 "country string");
439 break;
440 }
441 os_memcpy(rep->country, pos, 2);
442 rep->country_present = 1;
443 break;
444 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
445 if (elen < 1) {
446 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
447 "candidate");
448 break;
449 }
450 rep->preference = pos[0];
451 rep->preference_present = 1;
452 break;
453 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
454 if (elen < 10) {
455 wpa_printf(MSG_DEBUG,
456 "WNM: Too short BSS termination duration");
457 break;
458 }
459 rep->bss_term_tsf = WPA_GET_LE64(pos);
460 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
461 rep->bss_term_present = 1;
462 break;
463 case WNM_NEIGHBOR_BEARING:
464 if (elen < 8) {
465 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
466 "bearing");
467 break;
468 }
469 rep->bearing = WPA_GET_LE16(pos);
470 rep->distance = WPA_GET_LE32(pos + 2);
471 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
472 rep->bearing_present = 1;
473 break;
474 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
475 if (elen < 1) {
476 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
477 "pilot");
478 break;
479 }
480 os_free(rep->meas_pilot);
481 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
482 if (rep->meas_pilot == NULL)
483 break;
484 rep->meas_pilot->measurement_pilot = pos[0];
485 rep->meas_pilot->subelem_len = elen - 1;
486 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
487 break;
488 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
489 if (elen < 5) {
490 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
491 "capabilities");
492 break;
493 }
494 os_memcpy(rep->rm_capab, pos, 5);
495 rep->rm_capab_present = 1;
496 break;
497 case WNM_NEIGHBOR_MULTIPLE_BSSID:
498 if (elen < 1) {
499 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
500 break;
501 }
502 os_free(rep->mul_bssid);
503 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
504 if (rep->mul_bssid == NULL)
505 break;
506 rep->mul_bssid->max_bssid_indicator = pos[0];
507 rep->mul_bssid->subelem_len = elen - 1;
508 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
509 break;
510 }
511 }
512
513
wnm_nei_get_chan(struct wpa_supplicant * wpa_s,u8 op_class,u8 chan)514 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
515 {
516 struct wpa_bss *bss = wpa_s->current_bss;
517 const char *country = NULL;
518 int freq;
519
520 if (bss) {
521 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
522
523 if (elem && elem[1] >= 2)
524 country = (const char *) (elem + 2);
525 }
526
527 freq = ieee80211_chan_to_freq(country, op_class, chan);
528 if (freq <= 0 && op_class == 0) {
529 /*
530 * Some APs do not advertise correct operating class
531 * information. Try to determine the most likely operating
532 * frequency based on the channel number.
533 */
534 if (chan >= 1 && chan <= 13)
535 freq = 2407 + chan * 5;
536 else if (chan == 14)
537 freq = 2484;
538 else if (chan >= 36 && chan <= 169)
539 freq = 5000 + chan * 5;
540 }
541 return freq;
542 }
543
544
wnm_parse_neighbor_report(struct wpa_supplicant * wpa_s,const u8 * pos,u8 len,struct neighbor_report * rep)545 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
546 const u8 *pos, u8 len,
547 struct neighbor_report *rep)
548 {
549 u8 left = len;
550
551 if (left < 13) {
552 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
553 return;
554 }
555
556 os_memcpy(rep->bssid, pos, ETH_ALEN);
557 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
558 rep->regulatory_class = *(pos + 10);
559 rep->channel_number = *(pos + 11);
560 rep->phy_type = *(pos + 12);
561
562 pos += 13;
563 left -= 13;
564
565 while (left >= 2) {
566 u8 id, elen;
567
568 id = *pos++;
569 elen = *pos++;
570 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
571 left -= 2;
572 if (elen > left) {
573 wpa_printf(MSG_DEBUG,
574 "WNM: Truncated neighbor report subelement");
575 break;
576 }
577 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
578 left -= elen;
579 pos += elen;
580 }
581
582 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
583 rep->channel_number);
584 }
585
586
wnm_clear_acceptable(struct wpa_supplicant * wpa_s)587 static void wnm_clear_acceptable(struct wpa_supplicant *wpa_s)
588 {
589 unsigned int i;
590
591 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++)
592 wpa_s->wnm_neighbor_report_elements[i].acceptable = 0;
593 }
594
595
get_first_acceptable(struct wpa_supplicant * wpa_s)596 static struct wpa_bss * get_first_acceptable(struct wpa_supplicant *wpa_s)
597 {
598 unsigned int i;
599 struct neighbor_report *nei;
600
601 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
602 nei = &wpa_s->wnm_neighbor_report_elements[i];
603 if (nei->acceptable)
604 return wpa_bss_get_bssid(wpa_s, nei->bssid);
605 }
606
607 return NULL;
608 }
609
610
611 #ifdef CONFIG_MBO
612 static struct wpa_bss *
get_mbo_transition_candidate(struct wpa_supplicant * wpa_s,enum mbo_transition_reject_reason * reason)613 get_mbo_transition_candidate(struct wpa_supplicant *wpa_s,
614 enum mbo_transition_reject_reason *reason)
615 {
616 struct wpa_bss *target = NULL;
617 struct wpa_bss_trans_info params;
618 struct wpa_bss_candidate_info *info = NULL;
619 struct neighbor_report *nei = wpa_s->wnm_neighbor_report_elements;
620 u8 *first_candidate_bssid = NULL, *pos;
621 unsigned int i;
622
623 params.mbo_transition_reason = wpa_s->wnm_mbo_transition_reason;
624 params.n_candidates = 0;
625 params.bssid = os_calloc(wpa_s->wnm_num_neighbor_report, ETH_ALEN);
626 if (!params.bssid)
627 return NULL;
628
629 pos = params.bssid;
630 for (i = 0; i < wpa_s->wnm_num_neighbor_report; nei++, i++) {
631 if (nei->is_first)
632 first_candidate_bssid = nei->bssid;
633 if (!nei->acceptable)
634 continue;
635 os_memcpy(pos, nei->bssid, ETH_ALEN);
636 pos += ETH_ALEN;
637 params.n_candidates++;
638 }
639
640 if (!params.n_candidates)
641 goto end;
642
643 info = wpa_drv_get_bss_trans_status(wpa_s, ¶ms);
644 if (!info) {
645 /* If failed to get candidate BSS transition status from driver,
646 * get the first acceptable candidate from wpa_supplicant.
647 */
648 target = wpa_bss_get_bssid(wpa_s, params.bssid);
649 goto end;
650 }
651
652 /* Get the first acceptable candidate from driver */
653 for (i = 0; i < info->num; i++) {
654 if (info->candidates[i].is_accept) {
655 target = wpa_bss_get_bssid(wpa_s,
656 info->candidates[i].bssid);
657 goto end;
658 }
659 }
660
661 /* If Disassociation Imminent is set and driver rejects all the
662 * candidate select first acceptable candidate which has
663 * rssi > disassoc_imminent_rssi_threshold
664 */
665 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
666 for (i = 0; i < info->num; i++) {
667 target = wpa_bss_get_bssid(wpa_s,
668 info->candidates[i].bssid);
669 if (target &&
670 (target->level <
671 wpa_s->conf->disassoc_imminent_rssi_threshold))
672 continue;
673 goto end;
674 }
675 }
676
677 /* While sending BTM reject use reason code of the first candidate
678 * received in BTM request frame
679 */
680 if (reason) {
681 for (i = 0; i < info->num; i++) {
682 if (first_candidate_bssid &&
683 os_memcmp(first_candidate_bssid,
684 info->candidates[i].bssid, ETH_ALEN) == 0)
685 {
686 *reason = info->candidates[i].reject_reason;
687 break;
688 }
689 }
690 }
691
692 target = NULL;
693
694 end:
695 os_free(params.bssid);
696 if (info) {
697 os_free(info->candidates);
698 os_free(info);
699 }
700 return target;
701 }
702 #endif /* CONFIG_MBO */
703
704
705 static struct wpa_bss *
compare_scan_neighbor_results(struct wpa_supplicant * wpa_s,os_time_t age_secs,enum mbo_transition_reject_reason * reason)706 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs,
707 enum mbo_transition_reject_reason *reason)
708 {
709 u8 i;
710 struct wpa_bss *bss = wpa_s->current_bss;
711 struct wpa_bss *target;
712
713 if (!bss)
714 return NULL;
715
716 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
717 MAC2STR(wpa_s->bssid), bss->level);
718
719 wnm_clear_acceptable(wpa_s);
720
721 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
722 struct neighbor_report *nei;
723
724 nei = &wpa_s->wnm_neighbor_report_elements[i];
725 if (nei->preference_present && nei->preference == 0) {
726 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
727 MAC2STR(nei->bssid));
728 continue;
729 }
730
731 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
732 if (!target) {
733 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
734 " (pref %d) not found in scan results",
735 MAC2STR(nei->bssid),
736 nei->preference_present ? nei->preference :
737 -1);
738 continue;
739 }
740
741 if (age_secs) {
742 struct os_reltime now;
743
744 if (os_get_reltime(&now) == 0 &&
745 os_reltime_expired(&now, &target->last_update,
746 age_secs)) {
747 wpa_printf(MSG_DEBUG,
748 "Candidate BSS is more than %ld seconds old",
749 age_secs);
750 continue;
751 }
752 }
753
754 if (bss->ssid_len != target->ssid_len ||
755 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
756 /*
757 * TODO: Could consider allowing transition to another
758 * ESS if PMF was enabled for the association.
759 */
760 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
761 " (pref %d) in different ESS",
762 MAC2STR(nei->bssid),
763 nei->preference_present ? nei->preference :
764 -1);
765 continue;
766 }
767
768 if (wpa_s->current_ssid &&
769 !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
770 1, 0)) {
771 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
772 " (pref %d) does not match the current network profile",
773 MAC2STR(nei->bssid),
774 nei->preference_present ? nei->preference :
775 -1);
776 continue;
777 }
778
779 if (wpa_is_bss_tmp_disallowed(wpa_s, target)) {
780 wpa_printf(MSG_DEBUG,
781 "MBO: Candidate BSS " MACSTR
782 " retry delay is not over yet",
783 MAC2STR(nei->bssid));
784 continue;
785 }
786
787 if (target->level < bss->level && target->level < -80) {
788 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
789 " (pref %d) does not have sufficient signal level (%d)",
790 MAC2STR(nei->bssid),
791 nei->preference_present ? nei->preference :
792 -1,
793 target->level);
794 continue;
795 }
796
797 nei->acceptable = 1;
798 }
799
800 #ifdef CONFIG_MBO
801 if (wpa_s->wnm_mbo_trans_reason_present)
802 target = get_mbo_transition_candidate(wpa_s, reason);
803 else
804 target = get_first_acceptable(wpa_s);
805 #else /* CONFIG_MBO */
806 target = get_first_acceptable(wpa_s);
807 #endif /* CONFIG_MBO */
808
809 if (target) {
810 wpa_printf(MSG_DEBUG,
811 "WNM: Found an acceptable preferred transition candidate BSS "
812 MACSTR " (RSSI %d)",
813 MAC2STR(target->bssid), target->level);
814 }
815
816 return target;
817 }
818
819
wpa_bss_ies_eq(struct wpa_bss * a,struct wpa_bss * b,u8 eid)820 static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
821 {
822 const u8 *ie_a, *ie_b;
823
824 if (!a || !b)
825 return 0;
826
827 ie_a = wpa_bss_get_ie(a, eid);
828 ie_b = wpa_bss_get_ie(b, eid);
829
830 if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
831 return 0;
832
833 return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
834 }
835
836
wnm_get_bss_info(struct wpa_supplicant * wpa_s,struct wpa_bss * bss)837 static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
838 {
839 u32 info = 0;
840
841 info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
842
843 /*
844 * Leave the security and key scope bits unset to indicate that the
845 * security information is not available.
846 */
847
848 if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
849 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
850 if (bss->caps & WLAN_CAPABILITY_QOS)
851 info |= NEI_REP_BSSID_INFO_QOS;
852 if (bss->caps & WLAN_CAPABILITY_APSD)
853 info |= NEI_REP_BSSID_INFO_APSD;
854 if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
855 info |= NEI_REP_BSSID_INFO_RM;
856 if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
857 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
858 if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
859 info |= NEI_REP_BSSID_INFO_IMM_BA;
860 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
861 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
862 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
863 info |= NEI_REP_BSSID_INFO_HT;
864
865 return info;
866 }
867
868
wnm_add_nei_rep(struct wpabuf ** buf,const u8 * bssid,u32 bss_info,u8 op_class,u8 chan,u8 phy_type,u8 pref)869 static int wnm_add_nei_rep(struct wpabuf **buf, const u8 *bssid,
870 u32 bss_info, u8 op_class, u8 chan, u8 phy_type,
871 u8 pref)
872 {
873 if (wpabuf_len(*buf) + 18 >
874 IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN) {
875 wpa_printf(MSG_DEBUG,
876 "WNM: No room in frame for Neighbor Report element");
877 return -1;
878 }
879
880 if (wpabuf_resize(buf, 18) < 0) {
881 wpa_printf(MSG_DEBUG,
882 "WNM: Failed to allocate memory for Neighbor Report element");
883 return -1;
884 }
885
886 wpabuf_put_u8(*buf, WLAN_EID_NEIGHBOR_REPORT);
887 /* length: 13 for basic neighbor report + 3 for preference subelement */
888 wpabuf_put_u8(*buf, 16);
889 wpabuf_put_data(*buf, bssid, ETH_ALEN);
890 wpabuf_put_le32(*buf, bss_info);
891 wpabuf_put_u8(*buf, op_class);
892 wpabuf_put_u8(*buf, chan);
893 wpabuf_put_u8(*buf, phy_type);
894 wpabuf_put_u8(*buf, WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE);
895 wpabuf_put_u8(*buf, 1);
896 wpabuf_put_u8(*buf, pref);
897 return 0;
898 }
899
900
wnm_nei_rep_add_bss(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpabuf ** buf,u8 pref)901 static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
902 struct wpa_bss *bss, struct wpabuf **buf,
903 u8 pref)
904 {
905 const u8 *ie;
906 u8 op_class, chan;
907 int sec_chan = 0, vht = 0;
908 enum phy_type phy_type;
909 u32 info;
910 struct ieee80211_ht_operation *ht_oper = NULL;
911 struct ieee80211_vht_operation *vht_oper = NULL;
912
913 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
914 if (ie && ie[1] >= 2) {
915 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
916
917 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
918 sec_chan = 1;
919 else if (ht_oper->ht_param &
920 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
921 sec_chan = -1;
922 }
923
924 ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
925 if (ie && ie[1] >= 1) {
926 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
927
928 if (vht_oper->vht_op_info_chwidth == CHANWIDTH_80MHZ ||
929 vht_oper->vht_op_info_chwidth == CHANWIDTH_160MHZ ||
930 vht_oper->vht_op_info_chwidth == CHANWIDTH_80P80MHZ)
931 vht = vht_oper->vht_op_info_chwidth;
932 }
933
934 if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
935 &chan) == NUM_HOSTAPD_MODES) {
936 wpa_printf(MSG_DEBUG,
937 "WNM: Cannot determine operating class and channel");
938 return -2;
939 }
940
941 phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
942 (vht_oper != NULL));
943 if (phy_type == PHY_TYPE_UNSPECIFIED) {
944 wpa_printf(MSG_DEBUG,
945 "WNM: Cannot determine BSS phy type for Neighbor Report");
946 return -2;
947 }
948
949 info = wnm_get_bss_info(wpa_s, bss);
950
951 return wnm_add_nei_rep(buf, bss->bssid, info, op_class, chan, phy_type,
952 pref);
953 }
954
955
wnm_add_cand_list(struct wpa_supplicant * wpa_s,struct wpabuf ** buf)956 static void wnm_add_cand_list(struct wpa_supplicant *wpa_s, struct wpabuf **buf)
957 {
958 unsigned int i, pref = 255;
959 struct os_reltime now;
960 struct wpa_ssid *ssid = wpa_s->current_ssid;
961
962 if (!ssid)
963 return;
964
965 /*
966 * TODO: Define when scan results are no longer valid for the candidate
967 * list.
968 */
969 os_get_reltime(&now);
970 if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
971 return;
972
973 wpa_printf(MSG_DEBUG,
974 "WNM: Add candidate list to BSS Transition Management Response frame");
975 for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
976 struct wpa_bss *bss = wpa_s->last_scan_res[i];
977 int res;
978
979 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1, 0)) {
980 res = wnm_nei_rep_add_bss(wpa_s, bss, buf, pref--);
981 if (res == -2)
982 continue; /* could not build entry for BSS */
983 if (res < 0)
984 break; /* no more room for candidates */
985 if (pref == 1)
986 break;
987 }
988 }
989
990 wpa_hexdump_buf(MSG_DEBUG,
991 "WNM: BSS Transition Management Response candidate list",
992 *buf);
993 }
994
995
996 #define BTM_RESP_MIN_SIZE 5 + ETH_ALEN
997
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)998 static void wnm_send_bss_transition_mgmt_resp(
999 struct wpa_supplicant *wpa_s, u8 dialog_token,
1000 enum bss_trans_mgmt_status_code status,
1001 enum mbo_transition_reject_reason reason,
1002 u8 delay, const u8 *target_bssid)
1003 {
1004 struct wpabuf *buf;
1005 int res;
1006
1007 wpa_printf(MSG_DEBUG,
1008 "WNM: Send BSS Transition Management Response to " MACSTR
1009 " dialog_token=%u status=%u reason=%u delay=%d",
1010 MAC2STR(wpa_s->bssid), dialog_token, status, reason, delay);
1011 if (!wpa_s->current_bss) {
1012 wpa_printf(MSG_DEBUG,
1013 "WNM: Current BSS not known - drop response");
1014 return;
1015 }
1016
1017 buf = wpabuf_alloc(BTM_RESP_MIN_SIZE);
1018 if (!buf) {
1019 wpa_printf(MSG_DEBUG,
1020 "WNM: Failed to allocate memory for BTM response");
1021 return;
1022 }
1023
1024 wpa_s->bss_tm_status = status;
1025 wpas_notify_bss_tm_status(wpa_s);
1026
1027 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1028 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_RESP);
1029 wpabuf_put_u8(buf, dialog_token);
1030 wpabuf_put_u8(buf, status);
1031 wpabuf_put_u8(buf, delay);
1032 if (target_bssid) {
1033 wpabuf_put_data(buf, target_bssid, ETH_ALEN);
1034 } else if (status == WNM_BSS_TM_ACCEPT) {
1035 /*
1036 * P802.11-REVmc clarifies that the Target BSSID field is always
1037 * present when status code is zero, so use a fake value here if
1038 * no BSSID is yet known.
1039 */
1040 wpabuf_put_data(buf, "\0\0\0\0\0\0", ETH_ALEN);
1041 }
1042
1043 if (status == WNM_BSS_TM_ACCEPT)
1044 wnm_add_cand_list(wpa_s, &buf);
1045
1046 #ifdef CONFIG_MBO
1047 if (status != WNM_BSS_TM_ACCEPT &&
1048 wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) {
1049 u8 mbo[10];
1050 size_t ret;
1051
1052 ret = wpas_mbo_ie_bss_trans_reject(wpa_s, mbo, sizeof(mbo),
1053 reason);
1054 if (ret) {
1055 if (wpabuf_resize(&buf, ret) < 0) {
1056 wpabuf_free(buf);
1057 wpa_printf(MSG_DEBUG,
1058 "WNM: Failed to allocate memory for MBO IE");
1059 return;
1060 }
1061
1062 wpabuf_put_data(buf, mbo, ret);
1063 }
1064 }
1065 #endif /* CONFIG_MBO */
1066
1067 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1068 wpa_s->own_addr, wpa_s->bssid,
1069 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1070 if (res < 0) {
1071 wpa_printf(MSG_DEBUG,
1072 "WNM: Failed to send BSS Transition Management Response");
1073 }
1074
1075 wpabuf_free(buf);
1076 }
1077
1078
wnm_bss_tm_connect(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid,int after_new_scan)1079 static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
1080 struct wpa_bss *bss, struct wpa_ssid *ssid,
1081 int after_new_scan)
1082 {
1083 wpa_dbg(wpa_s, MSG_DEBUG,
1084 "WNM: Transition to BSS " MACSTR
1085 " based on BSS Transition Management Request (old BSSID "
1086 MACSTR " after_new_scan=%d)",
1087 MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan);
1088
1089 /* Send the BSS Management Response - Accept */
1090 if (wpa_s->wnm_reply) {
1091 wpa_s->wnm_reply = 0;
1092 wpa_printf(MSG_DEBUG,
1093 "WNM: Sending successful BSS Transition Management Response");
1094 wnm_send_bss_transition_mgmt_resp(
1095 wpa_s, wpa_s->wnm_dialog_token, WNM_BSS_TM_ACCEPT,
1096 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1097 bss->bssid);
1098 }
1099
1100 if (bss == wpa_s->current_bss) {
1101 wpa_printf(MSG_DEBUG,
1102 "WNM: Already associated with the preferred candidate");
1103 wnm_deallocate_memory(wpa_s);
1104 return;
1105 }
1106
1107 wpa_s->reassociate = 1;
1108 wpa_printf(MSG_DEBUG, "WNM: Issuing connect");
1109 wpa_supplicant_connect(wpa_s, bss, ssid);
1110 wnm_deallocate_memory(wpa_s);
1111 }
1112
1113
wnm_scan_process(struct wpa_supplicant * wpa_s,int reply_on_fail)1114 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
1115 {
1116 struct wpa_bss *bss;
1117 struct wpa_ssid *ssid = wpa_s->current_ssid;
1118 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1119 enum mbo_transition_reject_reason reason =
1120 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED;
1121
1122 if (!wpa_s->wnm_neighbor_report_elements)
1123 return 0;
1124
1125 wpa_dbg(wpa_s, MSG_DEBUG,
1126 "WNM: Process scan results for BSS Transition Management");
1127 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
1128 &wpa_s->scan_trigger_time)) {
1129 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
1130 wnm_deallocate_memory(wpa_s);
1131 return 0;
1132 }
1133
1134 if (!wpa_s->current_bss ||
1135 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
1136 ETH_ALEN) != 0) {
1137 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
1138 return 0;
1139 }
1140
1141 /* Compare the Neighbor Report and scan results */
1142 bss = compare_scan_neighbor_results(wpa_s, 0, &reason);
1143 if (!bss) {
1144 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
1145 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
1146 goto send_bss_resp_fail;
1147 }
1148
1149 /* Associate to the network */
1150 wnm_bss_tm_connect(wpa_s, bss, ssid, 1);
1151 return 1;
1152
1153 send_bss_resp_fail:
1154 if (!reply_on_fail)
1155 return 0;
1156
1157 /* Send reject response for all the failures */
1158
1159 if (wpa_s->wnm_reply) {
1160 wpa_s->wnm_reply = 0;
1161 wnm_send_bss_transition_mgmt_resp(wpa_s,
1162 wpa_s->wnm_dialog_token,
1163 status, reason, 0, NULL);
1164 }
1165 wnm_deallocate_memory(wpa_s);
1166
1167 return 0;
1168 }
1169
1170
cand_pref_compar(const void * a,const void * b)1171 static int cand_pref_compar(const void *a, const void *b)
1172 {
1173 const struct neighbor_report *aa = a;
1174 const struct neighbor_report *bb = b;
1175
1176 if (!aa->preference_present && !bb->preference_present)
1177 return 0;
1178 if (!aa->preference_present)
1179 return 1;
1180 if (!bb->preference_present)
1181 return -1;
1182 if (bb->preference > aa->preference)
1183 return 1;
1184 if (bb->preference < aa->preference)
1185 return -1;
1186 return 0;
1187 }
1188
1189
wnm_sort_cand_list(struct wpa_supplicant * wpa_s)1190 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
1191 {
1192 if (!wpa_s->wnm_neighbor_report_elements)
1193 return;
1194 qsort(wpa_s->wnm_neighbor_report_elements,
1195 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
1196 cand_pref_compar);
1197 }
1198
1199
wnm_dump_cand_list(struct wpa_supplicant * wpa_s)1200 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
1201 {
1202 unsigned int i;
1203
1204 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
1205 if (!wpa_s->wnm_neighbor_report_elements)
1206 return;
1207 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1208 struct neighbor_report *nei;
1209
1210 nei = &wpa_s->wnm_neighbor_report_elements[i];
1211 wpa_printf(MSG_DEBUG, "%u: " MACSTR
1212 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
1213 i, MAC2STR(nei->bssid), nei->bssid_info,
1214 nei->regulatory_class,
1215 nei->channel_number, nei->phy_type,
1216 nei->preference_present ? nei->preference : -1,
1217 nei->freq);
1218 }
1219 }
1220
1221
chan_supported(struct wpa_supplicant * wpa_s,int freq)1222 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
1223 {
1224 unsigned int i;
1225
1226 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1227 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
1228 int j;
1229
1230 for (j = 0; j < mode->num_channels; j++) {
1231 struct hostapd_channel_data *chan;
1232
1233 chan = &mode->channels[j];
1234 if (chan->freq == freq &&
1235 !(chan->flag & HOSTAPD_CHAN_DISABLED))
1236 return 1;
1237 }
1238 }
1239
1240 return 0;
1241 }
1242
1243
wnm_set_scan_freqs(struct wpa_supplicant * wpa_s)1244 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
1245 {
1246 int *freqs;
1247 int num_freqs = 0;
1248 unsigned int i;
1249
1250 if (!wpa_s->wnm_neighbor_report_elements)
1251 return;
1252
1253 if (wpa_s->hw.modes == NULL)
1254 return;
1255
1256 os_free(wpa_s->next_scan_freqs);
1257 wpa_s->next_scan_freqs = NULL;
1258
1259 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
1260 if (freqs == NULL)
1261 return;
1262
1263 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1264 struct neighbor_report *nei;
1265
1266 nei = &wpa_s->wnm_neighbor_report_elements[i];
1267 if (nei->freq <= 0) {
1268 wpa_printf(MSG_DEBUG,
1269 "WNM: Unknown neighbor operating frequency for "
1270 MACSTR " - scan all channels",
1271 MAC2STR(nei->bssid));
1272 os_free(freqs);
1273 return;
1274 }
1275 if (chan_supported(wpa_s, nei->freq))
1276 add_freq(freqs, &num_freqs, nei->freq);
1277 }
1278
1279 if (num_freqs == 0) {
1280 os_free(freqs);
1281 return;
1282 }
1283
1284 wpa_printf(MSG_DEBUG,
1285 "WNM: Scan %d frequencies based on transition candidate list",
1286 num_freqs);
1287 wpa_s->next_scan_freqs = freqs;
1288 }
1289
1290
wnm_fetch_scan_results(struct wpa_supplicant * wpa_s)1291 static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
1292 {
1293 struct wpa_scan_results *scan_res;
1294 struct wpa_bss *bss;
1295 struct wpa_ssid *ssid = wpa_s->current_ssid;
1296 u8 i, found = 0;
1297 size_t j;
1298
1299 wpa_dbg(wpa_s, MSG_DEBUG,
1300 "WNM: Fetch current scan results from the driver for checking transition candidates");
1301 scan_res = wpa_drv_get_scan_results2(wpa_s);
1302 if (!scan_res) {
1303 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
1304 return 0;
1305 }
1306
1307 if (scan_res->fetch_time.sec == 0)
1308 os_get_reltime(&scan_res->fetch_time);
1309
1310 filter_scan_res(wpa_s, scan_res);
1311
1312 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1313 struct neighbor_report *nei;
1314
1315 nei = &wpa_s->wnm_neighbor_report_elements[i];
1316 if (nei->preference_present && nei->preference == 0)
1317 continue;
1318
1319 for (j = 0; j < scan_res->num; j++) {
1320 struct wpa_scan_res *res;
1321 const u8 *ssid_ie;
1322
1323 res = scan_res->res[j];
1324 if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
1325 res->age > WNM_SCAN_RESULT_AGE * 1000)
1326 continue;
1327 bss = wpa_s->current_bss;
1328 ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
1329 if (bss && ssid_ie &&
1330 (bss->ssid_len != ssid_ie[1] ||
1331 os_memcmp(bss->ssid, ssid_ie + 2,
1332 bss->ssid_len) != 0))
1333 continue;
1334
1335 /* Potential candidate found */
1336 found = 1;
1337 scan_snr(res);
1338 scan_est_throughput(wpa_s, res);
1339 wpa_bss_update_scan_res(wpa_s, res,
1340 &scan_res->fetch_time);
1341 }
1342 }
1343
1344 wpa_scan_results_free(scan_res);
1345 if (!found) {
1346 wpa_dbg(wpa_s, MSG_DEBUG,
1347 "WNM: No transition candidate matches existing scan results");
1348 return 0;
1349 }
1350
1351 bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL);
1352 if (!bss) {
1353 wpa_dbg(wpa_s, MSG_DEBUG,
1354 "WNM: Comparison of scan results against transition candidates did not find matches");
1355 return 0;
1356 }
1357
1358 /* Associate to the network */
1359 wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
1360 return 1;
1361 }
1362
1363
ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant * wpa_s,const u8 * pos,const u8 * end,int reply)1364 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1365 const u8 *pos, const u8 *end,
1366 int reply)
1367 {
1368 unsigned int beacon_int;
1369 u8 valid_int;
1370 #ifdef CONFIG_MBO
1371 const u8 *vendor;
1372 #endif /* CONFIG_MBO */
1373
1374 if (wpa_s->conf->disable_btm)
1375 return;
1376
1377 if (end - pos < 5)
1378 return;
1379
1380 #ifdef CONFIG_MBO
1381 wpa_s->wnm_mbo_trans_reason_present = 0;
1382 wpa_s->wnm_mbo_transition_reason = 0;
1383 #endif /* CONFIG_MBO */
1384
1385 if (wpa_s->current_bss)
1386 beacon_int = wpa_s->current_bss->beacon_int;
1387 else
1388 beacon_int = 100; /* best guess */
1389
1390 wpa_s->wnm_dialog_token = pos[0];
1391 wpa_s->wnm_mode = pos[1];
1392 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
1393 valid_int = pos[4];
1394 wpa_s->wnm_reply = reply;
1395
1396 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1397 "dialog_token=%u request_mode=0x%x "
1398 "disassoc_timer=%u validity_interval=%u",
1399 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
1400 wpa_s->wnm_dissoc_timer, valid_int);
1401
1402 #if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS)
1403 if (wpa_s->reject_btm_req_reason) {
1404 wpa_printf(MSG_INFO,
1405 "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d",
1406 wpa_s->reject_btm_req_reason);
1407 wnm_send_bss_transition_mgmt_resp(
1408 wpa_s, wpa_s->wnm_dialog_token,
1409 wpa_s->reject_btm_req_reason,
1410 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1411 return;
1412 }
1413 #endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */
1414
1415 pos += 5;
1416
1417 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
1418 if (end - pos < 12) {
1419 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1420 return;
1421 }
1422 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
1423 pos += 12; /* BSS Termination Duration */
1424 }
1425
1426 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
1427 char url[256];
1428
1429 if (end - pos < 1 || 1 + pos[0] > end - pos) {
1430 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1431 "Management Request (URL)");
1432 return;
1433 }
1434 os_memcpy(url, pos + 1, pos[0]);
1435 url[pos[0]] = '\0';
1436 pos += 1 + pos[0];
1437
1438 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1439 wpa_sm_pmf_enabled(wpa_s->wpa),
1440 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
1441 }
1442
1443 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
1444 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
1445 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1446 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
1447 /* TODO: mark current BSS less preferred for
1448 * selection */
1449 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1450 wpa_supplicant_req_scan(wpa_s, 0, 0);
1451 }
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 #endif /* CONFIG_MBO */
1459
1460 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
1461 unsigned int valid_ms;
1462
1463 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
1464 wnm_deallocate_memory(wpa_s);
1465 wpa_s->wnm_neighbor_report_elements = os_calloc(
1466 WNM_MAX_NEIGHBOR_REPORT,
1467 sizeof(struct neighbor_report));
1468 if (wpa_s->wnm_neighbor_report_elements == NULL)
1469 return;
1470
1471 while (end - pos >= 2 &&
1472 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1473 {
1474 u8 tag = *pos++;
1475 u8 len = *pos++;
1476
1477 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1478 tag);
1479 if (len > end - pos) {
1480 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1481 return;
1482 }
1483 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1484 struct neighbor_report *rep;
1485 rep = &wpa_s->wnm_neighbor_report_elements[
1486 wpa_s->wnm_num_neighbor_report];
1487 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
1488 wpa_s->wnm_num_neighbor_report++;
1489 #ifdef CONFIG_MBO
1490 if (wpa_s->wnm_mbo_trans_reason_present &&
1491 wpa_s->wnm_num_neighbor_report == 1) {
1492 rep->is_first = 1;
1493 wpa_printf(MSG_DEBUG,
1494 "WNM: First transition candidate is "
1495 MACSTR, MAC2STR(rep->bssid));
1496 }
1497 #endif /* CONFIG_MBO */
1498 }
1499
1500 pos += len;
1501 }
1502
1503 if (!wpa_s->wnm_num_neighbor_report) {
1504 wpa_printf(MSG_DEBUG,
1505 "WNM: Candidate list included bit is set, but no candidates found");
1506 wnm_send_bss_transition_mgmt_resp(
1507 wpa_s, wpa_s->wnm_dialog_token,
1508 WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
1509 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1510 NULL);
1511 return;
1512 }
1513
1514 wnm_sort_cand_list(wpa_s);
1515 wnm_dump_cand_list(wpa_s);
1516 valid_ms = valid_int * beacon_int * 128 / 125;
1517 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1518 valid_ms);
1519 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1520 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1521 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1522 wpa_s->wnm_cand_valid_until.sec +=
1523 wpa_s->wnm_cand_valid_until.usec / 1000000;
1524 wpa_s->wnm_cand_valid_until.usec %= 1000000;
1525 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
1526
1527 /*
1528 * Fetch the latest scan results from the kernel and check for
1529 * candidates based on those results first. This can help in
1530 * finding more up-to-date information should the driver has
1531 * done some internal scanning operations after the last scan
1532 * result update in wpa_supplicant.
1533 */
1534 if (wnm_fetch_scan_results(wpa_s) > 0)
1535 return;
1536
1537 /*
1538 * Try to use previously received scan results, if they are
1539 * recent enough to use for a connection.
1540 */
1541 if (wpa_s->last_scan_res_used > 0) {
1542 struct os_reltime now;
1543
1544 os_get_reltime(&now);
1545 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1546 wpa_printf(MSG_DEBUG,
1547 "WNM: Try to use recent scan results");
1548 if (wnm_scan_process(wpa_s, 0) > 0)
1549 return;
1550 wpa_printf(MSG_DEBUG,
1551 "WNM: No match in previous scan results - try a new scan");
1552 }
1553 }
1554
1555 wnm_set_scan_freqs(wpa_s);
1556 if (wpa_s->wnm_num_neighbor_report == 1) {
1557 os_memcpy(wpa_s->next_scan_bssid,
1558 wpa_s->wnm_neighbor_report_elements[0].bssid,
1559 ETH_ALEN);
1560 wpa_printf(MSG_DEBUG,
1561 "WNM: Scan only for a specific BSSID since there is only a single candidate "
1562 MACSTR, MAC2STR(wpa_s->next_scan_bssid));
1563 }
1564 wpa_supplicant_req_scan(wpa_s, 0, 0);
1565 } else if (reply) {
1566 enum bss_trans_mgmt_status_code status;
1567 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1568 status = WNM_BSS_TM_ACCEPT;
1569 else {
1570 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1571 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1572 }
1573 wnm_send_bss_transition_mgmt_resp(
1574 wpa_s, wpa_s->wnm_dialog_token, status,
1575 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1576 }
1577 }
1578
1579
1580 #define BTM_QUERY_MIN_SIZE 4
1581
wnm_send_bss_transition_mgmt_query(struct wpa_supplicant * wpa_s,u8 query_reason,const char * btm_candidates,int cand_list)1582 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
1583 u8 query_reason,
1584 const char *btm_candidates,
1585 int cand_list)
1586 {
1587 struct wpabuf *buf;
1588 int ret;
1589
1590 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
1591 MACSTR " query_reason=%u%s",
1592 MAC2STR(wpa_s->bssid), query_reason,
1593 cand_list ? " candidate list" : "");
1594
1595 buf = wpabuf_alloc(BTM_QUERY_MIN_SIZE);
1596 if (!buf)
1597 return -1;
1598
1599 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1600 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_QUERY);
1601 wpabuf_put_u8(buf, 1);
1602 wpabuf_put_u8(buf, query_reason);
1603
1604 if (cand_list)
1605 wnm_add_cand_list(wpa_s, &buf);
1606
1607 if (btm_candidates) {
1608 const size_t max_len = 1000;
1609
1610 ret = wpabuf_resize(&buf, max_len);
1611 if (ret < 0) {
1612 wpabuf_free(buf);
1613 return ret;
1614 }
1615
1616 ret = ieee802_11_parse_candidate_list(btm_candidates,
1617 wpabuf_put(buf, 0),
1618 max_len);
1619 if (ret < 0) {
1620 wpabuf_free(buf);
1621 return ret;
1622 }
1623
1624 wpabuf_put(buf, ret);
1625 }
1626
1627 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1628 wpa_s->own_addr, wpa_s->bssid,
1629 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1630
1631 wpabuf_free(buf);
1632 return ret;
1633 }
1634
1635
ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * data,int len)1636 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1637 const u8 *sa, const u8 *data,
1638 int len)
1639 {
1640 const u8 *pos, *end, *next;
1641 u8 ie, ie_len;
1642
1643 pos = data;
1644 end = data + len;
1645
1646 while (end - pos > 1) {
1647 ie = *pos++;
1648 ie_len = *pos++;
1649 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1650 ie, ie_len);
1651 if (ie_len > end - pos) {
1652 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1653 "subelement");
1654 break;
1655 }
1656 next = pos + ie_len;
1657 if (ie_len < 4) {
1658 pos = next;
1659 continue;
1660 }
1661 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1662 WPA_GET_BE24(pos), pos[3]);
1663
1664 #ifdef CONFIG_HS20
1665 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1666 WPA_GET_BE24(pos) == OUI_WFA &&
1667 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1668 /* Subscription Remediation subelement */
1669 const u8 *ie_end;
1670 u8 url_len;
1671 char *url;
1672 u8 osu_method;
1673
1674 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1675 "subelement");
1676 ie_end = pos + ie_len;
1677 pos += 4;
1678 url_len = *pos++;
1679 if (url_len == 0) {
1680 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1681 url = NULL;
1682 osu_method = 1;
1683 } else {
1684 if (url_len + 1 > ie_end - pos) {
1685 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1686 url_len,
1687 (int) (ie_end - pos));
1688 break;
1689 }
1690 url = os_malloc(url_len + 1);
1691 if (url == NULL)
1692 break;
1693 os_memcpy(url, pos, url_len);
1694 url[url_len] = '\0';
1695 osu_method = pos[url_len];
1696 }
1697 hs20_rx_subscription_remediation(wpa_s, url,
1698 osu_method);
1699 os_free(url);
1700 pos = next;
1701 continue;
1702 }
1703
1704 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1705 WPA_GET_BE24(pos) == OUI_WFA &&
1706 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1707 const u8 *ie_end;
1708 u8 url_len;
1709 char *url;
1710 u8 code;
1711 u16 reauth_delay;
1712
1713 ie_end = pos + ie_len;
1714 pos += 4;
1715 code = *pos++;
1716 reauth_delay = WPA_GET_LE16(pos);
1717 pos += 2;
1718 url_len = *pos++;
1719 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1720 "Imminent - Reason Code %u "
1721 "Re-Auth Delay %u URL Length %u",
1722 code, reauth_delay, url_len);
1723 if (url_len > ie_end - pos)
1724 break;
1725 url = os_malloc(url_len + 1);
1726 if (url == NULL)
1727 break;
1728 os_memcpy(url, pos, url_len);
1729 url[url_len] = '\0';
1730 hs20_rx_deauth_imminent_notice(wpa_s, code,
1731 reauth_delay, url);
1732 os_free(url);
1733 pos = next;
1734 continue;
1735 }
1736
1737 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1738 WPA_GET_BE24(pos) == OUI_WFA &&
1739 pos[3] == HS20_WNM_T_C_ACCEPTANCE) {
1740 const u8 *ie_end;
1741 u8 url_len;
1742 char *url;
1743
1744 ie_end = pos + ie_len;
1745 pos += 4;
1746 url_len = *pos++;
1747 wpa_printf(MSG_DEBUG,
1748 "WNM: HS 2.0 Terms and Conditions Acceptance (URL Length %u)",
1749 url_len);
1750 if (url_len > ie_end - pos)
1751 break;
1752 url = os_malloc(url_len + 1);
1753 if (!url)
1754 break;
1755 os_memcpy(url, pos, url_len);
1756 url[url_len] = '\0';
1757 hs20_rx_t_c_acceptance(wpa_s, url);
1758 os_free(url);
1759 pos = next;
1760 continue;
1761 }
1762 #endif /* CONFIG_HS20 */
1763
1764 pos = next;
1765 }
1766 }
1767
1768
ieee802_11_rx_wnm_notif_req(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * frm,int len)1769 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1770 const u8 *sa, const u8 *frm, int len)
1771 {
1772 const u8 *pos, *end;
1773 u8 dialog_token, type;
1774
1775 /* Dialog Token [1] | Type [1] | Subelements */
1776
1777 if (len < 2 || sa == NULL)
1778 return;
1779 end = frm + len;
1780 pos = frm;
1781 dialog_token = *pos++;
1782 type = *pos++;
1783
1784 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1785 "(dialog_token %u type %u sa " MACSTR ")",
1786 dialog_token, type, MAC2STR(sa));
1787 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1788 pos, end - pos);
1789
1790 if (wpa_s->wpa_state != WPA_COMPLETED ||
1791 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1792 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1793 "from our AP - ignore it");
1794 return;
1795 }
1796
1797 switch (type) {
1798 case 1:
1799 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1800 break;
1801 default:
1802 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1803 "WNM-Notification type %u", type);
1804 break;
1805 }
1806 }
1807
1808
ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * frm,int len)1809 static void ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant *wpa_s,
1810 const u8 *sa, const u8 *frm,
1811 int len)
1812 {
1813 u8 dialog_token, req_info, auto_report, timeout;
1814
1815 if (!wpa_s->conf->coloc_intf_reporting)
1816 return;
1817
1818 /* Dialog Token [1] | Request Info [1] */
1819
1820 if (len < 2)
1821 return;
1822 dialog_token = frm[0];
1823 req_info = frm[1];
1824 auto_report = req_info & 0x03;
1825 timeout = req_info >> 2;
1826
1827 wpa_dbg(wpa_s, MSG_DEBUG,
1828 "WNM: Received Collocated Interference Request (dialog_token %u auto_report %u timeout %u sa " MACSTR ")",
1829 dialog_token, auto_report, timeout, MAC2STR(sa));
1830
1831 if (dialog_token == 0)
1832 return; /* only nonzero values are used for request */
1833
1834 if (wpa_s->wpa_state != WPA_COMPLETED ||
1835 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1836 wpa_dbg(wpa_s, MSG_DEBUG,
1837 "WNM: Collocated Interference Request frame not from current AP - ignore it");
1838 return;
1839 }
1840
1841 wpa_msg(wpa_s, MSG_INFO, COLOC_INTF_REQ "%u %u %u",
1842 dialog_token, auto_report, timeout);
1843 wpa_s->coloc_intf_dialog_token = dialog_token;
1844 wpa_s->coloc_intf_auto_report = auto_report;
1845 wpa_s->coloc_intf_timeout = timeout;
1846 }
1847
1848
ieee802_11_rx_wnm_action(struct wpa_supplicant * wpa_s,const struct ieee80211_mgmt * mgmt,size_t len)1849 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1850 const struct ieee80211_mgmt *mgmt, size_t len)
1851 {
1852 const u8 *pos, *end;
1853 u8 act;
1854
1855 if (len < IEEE80211_HDRLEN + 2)
1856 return;
1857
1858 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1859 act = *pos++;
1860 end = ((const u8 *) mgmt) + len;
1861
1862 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1863 act, MAC2STR(mgmt->sa));
1864 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1865 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1866 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1867 "frame");
1868 return;
1869 }
1870
1871 switch (act) {
1872 case WNM_BSS_TRANS_MGMT_REQ:
1873 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1874 !(mgmt->da[0] & 0x01));
1875 break;
1876 case WNM_SLEEP_MODE_RESP:
1877 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1878 break;
1879 case WNM_NOTIFICATION_REQ:
1880 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1881 break;
1882 case WNM_COLLOCATED_INTERFERENCE_REQ:
1883 ieee802_11_rx_wnm_coloc_intf_req(wpa_s, mgmt->sa, pos,
1884 end - pos);
1885 break;
1886 default:
1887 wpa_printf(MSG_ERROR, "WNM: Unknown request");
1888 break;
1889 }
1890 }
1891
1892
wnm_send_coloc_intf_report(struct wpa_supplicant * wpa_s,u8 dialog_token,const struct wpabuf * elems)1893 int wnm_send_coloc_intf_report(struct wpa_supplicant *wpa_s, u8 dialog_token,
1894 const struct wpabuf *elems)
1895 {
1896 struct wpabuf *buf;
1897 int ret;
1898
1899 if (wpa_s->wpa_state < WPA_ASSOCIATED || !elems)
1900 return -1;
1901
1902 wpa_printf(MSG_DEBUG, "WNM: Send Collocated Interference Report to "
1903 MACSTR " (dialog token %u)",
1904 MAC2STR(wpa_s->bssid), dialog_token);
1905
1906 buf = wpabuf_alloc(3 + wpabuf_len(elems));
1907 if (!buf)
1908 return -1;
1909
1910 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1911 wpabuf_put_u8(buf, WNM_COLLOCATED_INTERFERENCE_REPORT);
1912 wpabuf_put_u8(buf, dialog_token);
1913 wpabuf_put_buf(buf, elems);
1914
1915 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1916 wpa_s->own_addr, wpa_s->bssid,
1917 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1918 wpabuf_free(buf);
1919 return ret;
1920 }
1921
1922
wnm_set_coloc_intf_elems(struct wpa_supplicant * wpa_s,struct wpabuf * elems)1923 void wnm_set_coloc_intf_elems(struct wpa_supplicant *wpa_s,
1924 struct wpabuf *elems)
1925 {
1926 wpabuf_free(wpa_s->coloc_intf_elems);
1927 if (elems && wpabuf_len(elems) == 0) {
1928 wpabuf_free(elems);
1929 elems = NULL;
1930 }
1931 wpa_s->coloc_intf_elems = elems;
1932
1933 if (wpa_s->conf->coloc_intf_reporting && wpa_s->coloc_intf_elems &&
1934 wpa_s->coloc_intf_dialog_token &&
1935 (wpa_s->coloc_intf_auto_report == 1 ||
1936 wpa_s->coloc_intf_auto_report == 3)) {
1937 /* TODO: Check that there has not been less than
1938 * wpa_s->coloc_intf_timeout * 200 TU from the last report.
1939 */
1940 wnm_send_coloc_intf_report(wpa_s,
1941 wpa_s->coloc_intf_dialog_token,
1942 wpa_s->coloc_intf_elems);
1943 }
1944 }
1945
1946
wnm_clear_coloc_intf_reporting(struct wpa_supplicant * wpa_s)1947 void wnm_clear_coloc_intf_reporting(struct wpa_supplicant *wpa_s)
1948 {
1949 #ifdef CONFIG_WNM
1950 wpa_s->coloc_intf_dialog_token = 0;
1951 wpa_s->coloc_intf_auto_report = 0;
1952 #endif /* CONFIG_WNM */
1953 }
1954