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, "WNM: Too short bss_term_tsf");
456 break;
457 }
458 rep->bss_term_tsf = WPA_GET_LE64(pos);
459 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
460 rep->bss_term_present = 1;
461 break;
462 case WNM_NEIGHBOR_BEARING:
463 if (elen < 8) {
464 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
465 "bearing");
466 break;
467 }
468 rep->bearing = WPA_GET_LE16(pos);
469 rep->distance = WPA_GET_LE32(pos + 2);
470 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
471 rep->bearing_present = 1;
472 break;
473 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
474 if (elen < 1) {
475 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
476 "pilot");
477 break;
478 }
479 os_free(rep->meas_pilot);
480 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
481 if (rep->meas_pilot == NULL)
482 break;
483 rep->meas_pilot->measurement_pilot = pos[0];
484 rep->meas_pilot->subelem_len = elen - 1;
485 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
486 break;
487 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
488 if (elen < 5) {
489 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
490 "capabilities");
491 break;
492 }
493 os_memcpy(rep->rm_capab, pos, 5);
494 rep->rm_capab_present = 1;
495 break;
496 case WNM_NEIGHBOR_MULTIPLE_BSSID:
497 if (elen < 1) {
498 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
499 break;
500 }
501 os_free(rep->mul_bssid);
502 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
503 if (rep->mul_bssid == NULL)
504 break;
505 rep->mul_bssid->max_bssid_indicator = pos[0];
506 rep->mul_bssid->subelem_len = elen - 1;
507 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
508 break;
509 }
510 }
511
512
wnm_nei_get_chan(struct wpa_supplicant * wpa_s,u8 op_class,u8 chan)513 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
514 {
515 struct wpa_bss *bss = wpa_s->current_bss;
516 const char *country = NULL;
517 int freq;
518
519 if (bss) {
520 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
521
522 if (elem && elem[1] >= 2)
523 country = (const char *) (elem + 2);
524 }
525
526 freq = ieee80211_chan_to_freq(country, op_class, chan);
527 if (freq <= 0 && op_class == 0) {
528 /*
529 * Some APs do not advertise correct operating class
530 * information. Try to determine the most likely operating
531 * frequency based on the channel number.
532 */
533 if (chan >= 1 && chan <= 13)
534 freq = 2407 + chan * 5;
535 else if (chan == 14)
536 freq = 2484;
537 else if (chan >= 36 && chan <= 169)
538 freq = 5000 + chan * 5;
539 }
540 return freq;
541 }
542
543
wnm_parse_neighbor_report(struct wpa_supplicant * wpa_s,const u8 * pos,u8 len,struct neighbor_report * rep)544 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
545 const u8 *pos, u8 len,
546 struct neighbor_report *rep)
547 {
548 u8 left = len;
549
550 if (left < 13) {
551 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
552 return;
553 }
554
555 os_memcpy(rep->bssid, pos, ETH_ALEN);
556 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
557 rep->regulatory_class = *(pos + 10);
558 rep->channel_number = *(pos + 11);
559 rep->phy_type = *(pos + 12);
560
561 pos += 13;
562 left -= 13;
563
564 while (left >= 2) {
565 u8 id, elen;
566
567 id = *pos++;
568 elen = *pos++;
569 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
570 left -= 2;
571 if (elen > left) {
572 wpa_printf(MSG_DEBUG,
573 "WNM: Truncated neighbor report subelement");
574 break;
575 }
576 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
577 left -= elen;
578 pos += elen;
579 }
580
581 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
582 rep->channel_number);
583 }
584
585
wnm_clear_acceptable(struct wpa_supplicant * wpa_s)586 static void wnm_clear_acceptable(struct wpa_supplicant *wpa_s)
587 {
588 unsigned int i;
589
590 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++)
591 wpa_s->wnm_neighbor_report_elements[i].acceptable = 0;
592 }
593
594
get_first_acceptable(struct wpa_supplicant * wpa_s)595 static struct wpa_bss * get_first_acceptable(struct wpa_supplicant *wpa_s)
596 {
597 unsigned int i;
598 struct neighbor_report *nei;
599
600 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
601 nei = &wpa_s->wnm_neighbor_report_elements[i];
602 if (nei->acceptable)
603 return wpa_bss_get_bssid(wpa_s, nei->bssid);
604 }
605
606 return NULL;
607 }
608
609
610 #ifdef CONFIG_MBO
611 static struct wpa_bss *
get_mbo_transition_candidate(struct wpa_supplicant * wpa_s,enum mbo_transition_reject_reason * reason)612 get_mbo_transition_candidate(struct wpa_supplicant *wpa_s,
613 enum mbo_transition_reject_reason *reason)
614 {
615 struct wpa_bss *target = NULL;
616 struct wpa_bss_trans_info params;
617 struct wpa_bss_candidate_info *info = NULL;
618 struct neighbor_report *nei = wpa_s->wnm_neighbor_report_elements;
619 u8 *first_candidate_bssid = NULL, *pos;
620 unsigned int i;
621
622 params.mbo_transition_reason = wpa_s->wnm_mbo_transition_reason;
623 params.n_candidates = 0;
624 params.bssid = os_calloc(wpa_s->wnm_num_neighbor_report, ETH_ALEN);
625 if (!params.bssid)
626 return NULL;
627
628 pos = params.bssid;
629 for (i = 0; i < wpa_s->wnm_num_neighbor_report; nei++, i++) {
630 if (nei->is_first)
631 first_candidate_bssid = nei->bssid;
632 if (!nei->acceptable)
633 continue;
634 os_memcpy(pos, nei->bssid, ETH_ALEN);
635 pos += ETH_ALEN;
636 params.n_candidates++;
637 }
638
639 if (!params.n_candidates)
640 goto end;
641
642 info = wpa_drv_get_bss_trans_status(wpa_s, ¶ms);
643 if (!info) {
644 /* If failed to get candidate BSS transition status from driver,
645 * get the first acceptable candidate from wpa_supplicant.
646 */
647 target = wpa_bss_get_bssid(wpa_s, params.bssid);
648 goto end;
649 }
650
651 /* Get the first acceptable candidate from driver */
652 for (i = 0; i < info->num; i++) {
653 if (info->candidates[i].is_accept) {
654 target = wpa_bss_get_bssid(wpa_s,
655 info->candidates[i].bssid);
656 goto end;
657 }
658 }
659
660 /* If Disassociation Imminent is set and driver rejects all the
661 * candidate select first acceptable candidate which has
662 * rssi > disassoc_imminent_rssi_threshold
663 */
664 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
665 for (i = 0; i < info->num; i++) {
666 target = wpa_bss_get_bssid(wpa_s,
667 info->candidates[i].bssid);
668 if (target &&
669 (target->level <
670 wpa_s->conf->disassoc_imminent_rssi_threshold))
671 continue;
672 goto end;
673 }
674 }
675
676 /* While sending BTM reject use reason code of the first candidate
677 * received in BTM request frame
678 */
679 if (reason) {
680 for (i = 0; i < info->num; i++) {
681 if (first_candidate_bssid &&
682 os_memcmp(first_candidate_bssid,
683 info->candidates[i].bssid, ETH_ALEN) == 0)
684 {
685 *reason = info->candidates[i].reject_reason;
686 break;
687 }
688 }
689 }
690
691 target = NULL;
692
693 end:
694 os_free(params.bssid);
695 if (info) {
696 os_free(info->candidates);
697 os_free(info);
698 }
699 return target;
700 }
701 #endif /* CONFIG_MBO */
702
703
704 static struct wpa_bss *
compare_scan_neighbor_results(struct wpa_supplicant * wpa_s,os_time_t age_secs,enum mbo_transition_reject_reason * reason)705 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs,
706 enum mbo_transition_reject_reason *reason)
707 {
708 u8 i;
709 struct wpa_bss *bss = wpa_s->current_bss;
710 struct wpa_bss *target;
711
712 if (!bss)
713 return NULL;
714
715 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
716 MAC2STR(wpa_s->bssid), bss->level);
717
718 wnm_clear_acceptable(wpa_s);
719
720 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
721 struct neighbor_report *nei;
722
723 nei = &wpa_s->wnm_neighbor_report_elements[i];
724 if (nei->preference_present && nei->preference == 0) {
725 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
726 MAC2STR(nei->bssid));
727 continue;
728 }
729
730 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
731 if (!target) {
732 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
733 " (pref %d) not found in scan results",
734 MAC2STR(nei->bssid),
735 nei->preference_present ? nei->preference :
736 -1);
737 continue;
738 }
739
740 if (age_secs) {
741 struct os_reltime now;
742
743 if (os_get_reltime(&now) == 0 &&
744 os_reltime_expired(&now, &target->last_update,
745 age_secs)) {
746 wpa_printf(MSG_DEBUG,
747 "Candidate BSS is more than %ld seconds old",
748 age_secs);
749 continue;
750 }
751 }
752
753 if (bss->ssid_len != target->ssid_len ||
754 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
755 /*
756 * TODO: Could consider allowing transition to another
757 * ESS if PMF was enabled for the association.
758 */
759 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
760 " (pref %d) in different ESS",
761 MAC2STR(nei->bssid),
762 nei->preference_present ? nei->preference :
763 -1);
764 continue;
765 }
766
767 if (wpa_s->current_ssid &&
768 !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
769 1, 0)) {
770 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
771 " (pref %d) does not match the current network profile",
772 MAC2STR(nei->bssid),
773 nei->preference_present ? nei->preference :
774 -1);
775 continue;
776 }
777
778 if (wpa_is_bss_tmp_disallowed(wpa_s, target)) {
779 wpa_printf(MSG_DEBUG,
780 "MBO: Candidate BSS " MACSTR
781 " retry delay is not over yet",
782 MAC2STR(nei->bssid));
783 continue;
784 }
785
786 if (target->level < bss->level && target->level < -80) {
787 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
788 " (pref %d) does not have sufficient signal level (%d)",
789 MAC2STR(nei->bssid),
790 nei->preference_present ? nei->preference :
791 -1,
792 target->level);
793 continue;
794 }
795
796 nei->acceptable = 1;
797 }
798
799 #ifdef CONFIG_MBO
800 if (wpa_s->wnm_mbo_trans_reason_present)
801 target = get_mbo_transition_candidate(wpa_s, reason);
802 else
803 target = get_first_acceptable(wpa_s);
804 #else /* CONFIG_MBO */
805 target = get_first_acceptable(wpa_s);
806 #endif /* CONFIG_MBO */
807
808 if (target) {
809 wpa_printf(MSG_DEBUG,
810 "WNM: Found an acceptable preferred transition candidate BSS "
811 MACSTR " (RSSI %d)",
812 MAC2STR(target->bssid), target->level);
813 }
814
815 return target;
816 }
817
818
wpa_bss_ies_eq(struct wpa_bss * a,struct wpa_bss * b,u8 eid)819 static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
820 {
821 const u8 *ie_a, *ie_b;
822
823 if (!a || !b)
824 return 0;
825
826 ie_a = wpa_bss_get_ie(a, eid);
827 ie_b = wpa_bss_get_ie(b, eid);
828
829 if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
830 return 0;
831
832 return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
833 }
834
835
wnm_get_bss_info(struct wpa_supplicant * wpa_s,struct wpa_bss * bss)836 static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
837 {
838 u32 info = 0;
839
840 info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
841
842 /*
843 * Leave the security and key scope bits unset to indicate that the
844 * security information is not available.
845 */
846
847 if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
848 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
849 if (bss->caps & WLAN_CAPABILITY_QOS)
850 info |= NEI_REP_BSSID_INFO_QOS;
851 if (bss->caps & WLAN_CAPABILITY_APSD)
852 info |= NEI_REP_BSSID_INFO_APSD;
853 if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
854 info |= NEI_REP_BSSID_INFO_RM;
855 if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
856 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
857 if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
858 info |= NEI_REP_BSSID_INFO_IMM_BA;
859 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
860 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
861 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
862 info |= NEI_REP_BSSID_INFO_HT;
863
864 return info;
865 }
866
867
wnm_add_nei_rep(struct wpabuf ** buf,const u8 * bssid,u32 bss_info,u8 op_class,u8 chan,u8 phy_type,u8 pref)868 static int wnm_add_nei_rep(struct wpabuf **buf, const u8 *bssid,
869 u32 bss_info, u8 op_class, u8 chan, u8 phy_type,
870 u8 pref)
871 {
872 if (wpabuf_len(*buf) + 18 >
873 IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN) {
874 wpa_printf(MSG_DEBUG,
875 "WNM: No room in frame for Neighbor Report element");
876 return -1;
877 }
878
879 if (wpabuf_resize(buf, 18) < 0) {
880 wpa_printf(MSG_DEBUG,
881 "WNM: Failed to allocate memory for Neighbor Report element");
882 return -1;
883 }
884
885 wpabuf_put_u8(*buf, WLAN_EID_NEIGHBOR_REPORT);
886 /* length: 13 for basic neighbor report + 3 for preference subelement */
887 wpabuf_put_u8(*buf, 16);
888 wpabuf_put_data(*buf, bssid, ETH_ALEN);
889 wpabuf_put_le32(*buf, bss_info);
890 wpabuf_put_u8(*buf, op_class);
891 wpabuf_put_u8(*buf, chan);
892 wpabuf_put_u8(*buf, phy_type);
893 wpabuf_put_u8(*buf, WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE);
894 wpabuf_put_u8(*buf, 1);
895 wpabuf_put_u8(*buf, pref);
896 return 0;
897 }
898
899
wnm_nei_rep_add_bss(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpabuf ** buf,u8 pref)900 static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
901 struct wpa_bss *bss, struct wpabuf **buf,
902 u8 pref)
903 {
904 const u8 *ie;
905 u8 op_class, chan;
906 int sec_chan = 0, vht = 0;
907 enum phy_type phy_type;
908 u32 info;
909 struct ieee80211_ht_operation *ht_oper = NULL;
910 struct ieee80211_vht_operation *vht_oper = NULL;
911
912 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
913 if (ie && ie[1] >= 2) {
914 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
915
916 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
917 sec_chan = 1;
918 else if (ht_oper->ht_param &
919 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
920 sec_chan = -1;
921 }
922
923 ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
924 if (ie && ie[1] >= 1) {
925 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
926
927 if (vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80MHZ ||
928 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_160MHZ ||
929 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80P80MHZ)
930 vht = vht_oper->vht_op_info_chwidth;
931 }
932
933 if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
934 &chan) == NUM_HOSTAPD_MODES) {
935 wpa_printf(MSG_DEBUG,
936 "WNM: Cannot determine operating class and channel");
937 return -2;
938 }
939
940 phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
941 (vht_oper != NULL));
942 if (phy_type == PHY_TYPE_UNSPECIFIED) {
943 wpa_printf(MSG_DEBUG,
944 "WNM: Cannot determine BSS phy type for Neighbor Report");
945 return -2;
946 }
947
948 info = wnm_get_bss_info(wpa_s, bss);
949
950 return wnm_add_nei_rep(buf, bss->bssid, info, op_class, chan, phy_type,
951 pref);
952 }
953
954
wnm_add_cand_list(struct wpa_supplicant * wpa_s,struct wpabuf ** buf)955 static void wnm_add_cand_list(struct wpa_supplicant *wpa_s, struct wpabuf **buf)
956 {
957 unsigned int i, pref = 255;
958 struct os_reltime now;
959 struct wpa_ssid *ssid = wpa_s->current_ssid;
960
961 if (!ssid)
962 return;
963
964 /*
965 * TODO: Define when scan results are no longer valid for the candidate
966 * list.
967 */
968 os_get_reltime(&now);
969 if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
970 return;
971
972 wpa_printf(MSG_DEBUG,
973 "WNM: Add candidate list to BSS Transition Management Response frame");
974 for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
975 struct wpa_bss *bss = wpa_s->last_scan_res[i];
976 int res;
977
978 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1, 0)) {
979 res = wnm_nei_rep_add_bss(wpa_s, bss, buf, pref--);
980 if (res == -2)
981 continue; /* could not build entry for BSS */
982 if (res < 0)
983 break; /* no more room for candidates */
984 if (pref == 1)
985 break;
986 }
987 }
988
989 wpa_hexdump_buf(MSG_DEBUG,
990 "WNM: BSS Transition Management Response candidate list",
991 *buf);
992 }
993
994
995 #define BTM_RESP_MIN_SIZE 5 + ETH_ALEN
996
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)997 static void wnm_send_bss_transition_mgmt_resp(
998 struct wpa_supplicant *wpa_s, u8 dialog_token,
999 enum bss_trans_mgmt_status_code status,
1000 enum mbo_transition_reject_reason reason,
1001 u8 delay, const u8 *target_bssid)
1002 {
1003 struct wpabuf *buf;
1004 int res;
1005
1006 wpa_printf(MSG_DEBUG,
1007 "WNM: Send BSS Transition Management Response to " MACSTR
1008 " dialog_token=%u status=%u reason=%u delay=%d",
1009 MAC2STR(wpa_s->bssid), dialog_token, status, reason, delay);
1010 if (!wpa_s->current_bss) {
1011 wpa_printf(MSG_DEBUG,
1012 "WNM: Current BSS not known - drop response");
1013 return;
1014 }
1015
1016 buf = wpabuf_alloc(BTM_RESP_MIN_SIZE);
1017 if (!buf) {
1018 wpa_printf(MSG_DEBUG,
1019 "WNM: Failed to allocate memory for BTM response");
1020 return;
1021 }
1022
1023 wpa_s->bss_tm_status = status;
1024 wpas_notify_bss_tm_status(wpa_s);
1025
1026 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1027 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_RESP);
1028 wpabuf_put_u8(buf, dialog_token);
1029 wpabuf_put_u8(buf, status);
1030 wpabuf_put_u8(buf, delay);
1031 if (target_bssid) {
1032 wpabuf_put_data(buf, target_bssid, ETH_ALEN);
1033 } else if (status == WNM_BSS_TM_ACCEPT) {
1034 /*
1035 * P802.11-REVmc clarifies that the Target BSSID field is always
1036 * present when status code is zero, so use a fake value here if
1037 * no BSSID is yet known.
1038 */
1039 wpabuf_put_data(buf, "\0\0\0\0\0\0", ETH_ALEN);
1040 }
1041
1042 if (status == WNM_BSS_TM_ACCEPT)
1043 wnm_add_cand_list(wpa_s, &buf);
1044
1045 #ifdef CONFIG_MBO
1046 if (status != WNM_BSS_TM_ACCEPT &&
1047 wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) {
1048 u8 mbo[10];
1049 size_t ret;
1050
1051 ret = wpas_mbo_ie_bss_trans_reject(wpa_s, mbo, sizeof(mbo),
1052 reason);
1053 if (ret) {
1054 if (wpabuf_resize(&buf, ret) < 0) {
1055 wpabuf_free(buf);
1056 wpa_printf(MSG_DEBUG,
1057 "WNM: Failed to allocate memory for MBO IE");
1058 return;
1059 }
1060
1061 wpabuf_put_data(buf, mbo, ret);
1062 }
1063 }
1064 #endif /* CONFIG_MBO */
1065
1066 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1067 wpa_s->own_addr, wpa_s->bssid,
1068 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1069 if (res < 0) {
1070 wpa_printf(MSG_DEBUG,
1071 "WNM: Failed to send BSS Transition Management Response");
1072 }
1073
1074 wpabuf_free(buf);
1075 }
1076
1077
wnm_bss_tm_connect(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid,int after_new_scan)1078 static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
1079 struct wpa_bss *bss, struct wpa_ssid *ssid,
1080 int after_new_scan)
1081 {
1082 wpa_dbg(wpa_s, MSG_DEBUG,
1083 "WNM: Transition to BSS " MACSTR
1084 " based on BSS Transition Management Request (old BSSID "
1085 MACSTR " after_new_scan=%d)",
1086 MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan);
1087
1088 /* Send the BSS Management Response - Accept */
1089 if (wpa_s->wnm_reply) {
1090 wpa_s->wnm_reply = 0;
1091 wpa_printf(MSG_DEBUG,
1092 "WNM: Sending successful BSS Transition Management Response");
1093 wnm_send_bss_transition_mgmt_resp(
1094 wpa_s, wpa_s->wnm_dialog_token, WNM_BSS_TM_ACCEPT,
1095 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1096 bss->bssid);
1097 }
1098
1099 if (bss == wpa_s->current_bss) {
1100 wpa_printf(MSG_DEBUG,
1101 "WNM: Already associated with the preferred candidate");
1102 wnm_deallocate_memory(wpa_s);
1103 return;
1104 }
1105
1106 wpa_s->reassociate = 1;
1107 wpa_printf(MSG_DEBUG, "WNM: Issuing connect");
1108 wpa_supplicant_connect(wpa_s, bss, ssid);
1109 wnm_deallocate_memory(wpa_s);
1110 }
1111
1112
wnm_scan_process(struct wpa_supplicant * wpa_s,int reply_on_fail)1113 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
1114 {
1115 struct wpa_bss *bss;
1116 struct wpa_ssid *ssid = wpa_s->current_ssid;
1117 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1118 enum mbo_transition_reject_reason reason =
1119 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED;
1120
1121 if (!wpa_s->wnm_neighbor_report_elements)
1122 return 0;
1123
1124 wpa_dbg(wpa_s, MSG_DEBUG,
1125 "WNM: Process scan results for BSS Transition Management");
1126 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
1127 &wpa_s->scan_trigger_time)) {
1128 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
1129 wnm_deallocate_memory(wpa_s);
1130 return 0;
1131 }
1132
1133 if (!wpa_s->current_bss ||
1134 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
1135 ETH_ALEN) != 0) {
1136 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
1137 return 0;
1138 }
1139
1140 /* Compare the Neighbor Report and scan results */
1141 bss = compare_scan_neighbor_results(wpa_s, 0, &reason);
1142 if (!bss) {
1143 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
1144 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
1145 goto send_bss_resp_fail;
1146 }
1147
1148 /* Associate to the network */
1149 wnm_bss_tm_connect(wpa_s, bss, ssid, 1);
1150 return 1;
1151
1152 send_bss_resp_fail:
1153 if (!reply_on_fail)
1154 return 0;
1155
1156 /* Send reject response for all the failures */
1157
1158 if (wpa_s->wnm_reply) {
1159 wpa_s->wnm_reply = 0;
1160 wnm_send_bss_transition_mgmt_resp(wpa_s,
1161 wpa_s->wnm_dialog_token,
1162 status, reason, 0, NULL);
1163 }
1164 wnm_deallocate_memory(wpa_s);
1165
1166 return 0;
1167 }
1168
1169
cand_pref_compar(const void * a,const void * b)1170 static int cand_pref_compar(const void *a, const void *b)
1171 {
1172 const struct neighbor_report *aa = a;
1173 const struct neighbor_report *bb = b;
1174
1175 if (!aa->preference_present && !bb->preference_present)
1176 return 0;
1177 if (!aa->preference_present)
1178 return 1;
1179 if (!bb->preference_present)
1180 return -1;
1181 if (bb->preference > aa->preference)
1182 return 1;
1183 if (bb->preference < aa->preference)
1184 return -1;
1185 return 0;
1186 }
1187
1188
wnm_sort_cand_list(struct wpa_supplicant * wpa_s)1189 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
1190 {
1191 if (!wpa_s->wnm_neighbor_report_elements)
1192 return;
1193 qsort(wpa_s->wnm_neighbor_report_elements,
1194 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
1195 cand_pref_compar);
1196 }
1197
1198
wnm_dump_cand_list(struct wpa_supplicant * wpa_s)1199 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
1200 {
1201 unsigned int i;
1202
1203 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
1204 if (!wpa_s->wnm_neighbor_report_elements)
1205 return;
1206 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1207 struct neighbor_report *nei;
1208
1209 nei = &wpa_s->wnm_neighbor_report_elements[i];
1210 wpa_printf(MSG_DEBUG, "%u: " MACSTR
1211 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
1212 i, MAC2STR(nei->bssid), nei->bssid_info,
1213 nei->regulatory_class,
1214 nei->channel_number, nei->phy_type,
1215 nei->preference_present ? nei->preference : -1,
1216 nei->freq);
1217 }
1218 }
1219
1220
chan_supported(struct wpa_supplicant * wpa_s,int freq)1221 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
1222 {
1223 unsigned int i;
1224
1225 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1226 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
1227 int j;
1228
1229 for (j = 0; j < mode->num_channels; j++) {
1230 struct hostapd_channel_data *chan;
1231
1232 chan = &mode->channels[j];
1233 if (chan->freq == freq &&
1234 !(chan->flag & HOSTAPD_CHAN_DISABLED))
1235 return 1;
1236 }
1237 }
1238
1239 return 0;
1240 }
1241
1242
wnm_set_scan_freqs(struct wpa_supplicant * wpa_s)1243 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
1244 {
1245 int *freqs;
1246 int num_freqs = 0;
1247 unsigned int i;
1248
1249 if (!wpa_s->wnm_neighbor_report_elements)
1250 return;
1251
1252 if (wpa_s->hw.modes == NULL)
1253 return;
1254
1255 os_free(wpa_s->next_scan_freqs);
1256 wpa_s->next_scan_freqs = NULL;
1257
1258 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
1259 if (freqs == NULL)
1260 return;
1261
1262 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1263 struct neighbor_report *nei;
1264
1265 nei = &wpa_s->wnm_neighbor_report_elements[i];
1266 if (nei->freq <= 0) {
1267 wpa_printf(MSG_DEBUG,
1268 "WNM: Unknown neighbor operating frequency for "
1269 MACSTR " - scan all channels",
1270 MAC2STR(nei->bssid));
1271 os_free(freqs);
1272 return;
1273 }
1274 if (chan_supported(wpa_s, nei->freq))
1275 add_freq(freqs, &num_freqs, nei->freq);
1276 }
1277
1278 if (num_freqs == 0) {
1279 os_free(freqs);
1280 return;
1281 }
1282
1283 wpa_printf(MSG_DEBUG,
1284 "WNM: Scan %d frequencies based on transition candidate list",
1285 num_freqs);
1286 wpa_s->next_scan_freqs = freqs;
1287 }
1288
1289
wnm_fetch_scan_results(struct wpa_supplicant * wpa_s)1290 static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
1291 {
1292 struct wpa_scan_results *scan_res;
1293 struct wpa_bss *bss;
1294 struct wpa_ssid *ssid = wpa_s->current_ssid;
1295 u8 i, found = 0;
1296 size_t j;
1297
1298 wpa_dbg(wpa_s, MSG_DEBUG,
1299 "WNM: Fetch current scan results from the driver for checking transition candidates");
1300 scan_res = wpa_drv_get_scan_results2(wpa_s);
1301 if (!scan_res) {
1302 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
1303 return 0;
1304 }
1305
1306 if (scan_res->fetch_time.sec == 0)
1307 os_get_reltime(&scan_res->fetch_time);
1308
1309 filter_scan_res(wpa_s, scan_res);
1310
1311 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1312 struct neighbor_report *nei;
1313
1314 nei = &wpa_s->wnm_neighbor_report_elements[i];
1315 if (nei->preference_present && nei->preference == 0)
1316 continue;
1317
1318 for (j = 0; j < scan_res->num; j++) {
1319 struct wpa_scan_res *res;
1320 const u8 *ssid_ie;
1321
1322 res = scan_res->res[j];
1323 if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
1324 res->age > WNM_SCAN_RESULT_AGE * 1000)
1325 continue;
1326 bss = wpa_s->current_bss;
1327 ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
1328 if (bss && ssid_ie &&
1329 (bss->ssid_len != ssid_ie[1] ||
1330 os_memcmp(bss->ssid, ssid_ie + 2,
1331 bss->ssid_len) != 0))
1332 continue;
1333
1334 /* Potential candidate found */
1335 found = 1;
1336 scan_snr(res);
1337 scan_est_throughput(wpa_s, res);
1338 wpa_bss_update_scan_res(wpa_s, res,
1339 &scan_res->fetch_time);
1340 }
1341 }
1342
1343 wpa_scan_results_free(scan_res);
1344 if (!found) {
1345 wpa_dbg(wpa_s, MSG_DEBUG,
1346 "WNM: No transition candidate matches existing scan results");
1347 return 0;
1348 }
1349
1350 bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL);
1351 if (!bss) {
1352 wpa_dbg(wpa_s, MSG_DEBUG,
1353 "WNM: Comparison of scan results against transition candidates did not find matches");
1354 return 0;
1355 }
1356
1357 /* Associate to the network */
1358 wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
1359 return 1;
1360 }
1361
1362
ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant * wpa_s,const u8 * pos,const u8 * end,int reply)1363 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1364 const u8 *pos, const u8 *end,
1365 int reply)
1366 {
1367 unsigned int beacon_int;
1368 u8 valid_int;
1369 #ifdef CONFIG_MBO
1370 const u8 *vendor;
1371 #endif /* CONFIG_MBO */
1372
1373 if (end - pos < 5)
1374 return;
1375
1376 #ifdef CONFIG_MBO
1377 wpa_s->wnm_mbo_trans_reason_present = 0;
1378 wpa_s->wnm_mbo_transition_reason = 0;
1379 #endif /* CONFIG_MBO */
1380
1381 if (wpa_s->current_bss)
1382 beacon_int = wpa_s->current_bss->beacon_int;
1383 else
1384 beacon_int = 100; /* best guess */
1385
1386 wpa_s->wnm_dialog_token = pos[0];
1387 wpa_s->wnm_mode = pos[1];
1388 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
1389 valid_int = pos[4];
1390 wpa_s->wnm_reply = reply;
1391
1392 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1393 "dialog_token=%u request_mode=0x%x "
1394 "disassoc_timer=%u validity_interval=%u",
1395 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
1396 wpa_s->wnm_dissoc_timer, valid_int);
1397
1398 #if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS)
1399 if (wpa_s->reject_btm_req_reason) {
1400 wpa_printf(MSG_INFO,
1401 "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d",
1402 wpa_s->reject_btm_req_reason);
1403 wnm_send_bss_transition_mgmt_resp(
1404 wpa_s, wpa_s->wnm_dialog_token,
1405 wpa_s->reject_btm_req_reason,
1406 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1407 return;
1408 }
1409 #endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */
1410
1411 pos += 5;
1412
1413 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
1414 if (end - pos < 12) {
1415 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1416 return;
1417 }
1418 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
1419 pos += 12; /* BSS Termination Duration */
1420 }
1421
1422 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
1423 char url[256];
1424
1425 if (end - pos < 1 || 1 + pos[0] > end - pos) {
1426 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1427 "Management Request (URL)");
1428 return;
1429 }
1430 os_memcpy(url, pos + 1, pos[0]);
1431 url[pos[0]] = '\0';
1432 pos += 1 + pos[0];
1433
1434 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1435 wpa_sm_pmf_enabled(wpa_s->wpa),
1436 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
1437 }
1438
1439 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
1440 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
1441 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1442 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
1443 /* TODO: mark current BSS less preferred for
1444 * selection */
1445 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1446 wpa_supplicant_req_scan(wpa_s, 0, 0);
1447 }
1448 }
1449
1450 #ifdef CONFIG_MBO
1451 vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
1452 if (vendor)
1453 wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
1454 #endif /* CONFIG_MBO */
1455
1456 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
1457 unsigned int valid_ms;
1458
1459 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
1460 wnm_deallocate_memory(wpa_s);
1461 wpa_s->wnm_neighbor_report_elements = os_calloc(
1462 WNM_MAX_NEIGHBOR_REPORT,
1463 sizeof(struct neighbor_report));
1464 if (wpa_s->wnm_neighbor_report_elements == NULL)
1465 return;
1466
1467 while (end - pos >= 2 &&
1468 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1469 {
1470 u8 tag = *pos++;
1471 u8 len = *pos++;
1472
1473 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1474 tag);
1475 if (len > end - pos) {
1476 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1477 return;
1478 }
1479 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1480 struct neighbor_report *rep;
1481 rep = &wpa_s->wnm_neighbor_report_elements[
1482 wpa_s->wnm_num_neighbor_report];
1483 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
1484 wpa_s->wnm_num_neighbor_report++;
1485 #ifdef CONFIG_MBO
1486 if (wpa_s->wnm_mbo_trans_reason_present &&
1487 wpa_s->wnm_num_neighbor_report == 1) {
1488 rep->is_first = 1;
1489 wpa_printf(MSG_DEBUG,
1490 "WNM: First transition candidate is "
1491 MACSTR, MAC2STR(rep->bssid));
1492 }
1493 #endif /* CONFIG_MBO */
1494 }
1495
1496 pos += len;
1497 }
1498
1499 if (!wpa_s->wnm_num_neighbor_report) {
1500 wpa_printf(MSG_DEBUG,
1501 "WNM: Candidate list included bit is set, but no candidates found");
1502 wnm_send_bss_transition_mgmt_resp(
1503 wpa_s, wpa_s->wnm_dialog_token,
1504 WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
1505 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1506 NULL);
1507 return;
1508 }
1509
1510 wnm_sort_cand_list(wpa_s);
1511 wnm_dump_cand_list(wpa_s);
1512 valid_ms = valid_int * beacon_int * 128 / 125;
1513 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1514 valid_ms);
1515 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1516 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1517 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1518 wpa_s->wnm_cand_valid_until.sec +=
1519 wpa_s->wnm_cand_valid_until.usec / 1000000;
1520 wpa_s->wnm_cand_valid_until.usec %= 1000000;
1521 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
1522
1523 /*
1524 * Fetch the latest scan results from the kernel and check for
1525 * candidates based on those results first. This can help in
1526 * finding more up-to-date information should the driver has
1527 * done some internal scanning operations after the last scan
1528 * result update in wpa_supplicant.
1529 */
1530 if (wnm_fetch_scan_results(wpa_s) > 0)
1531 return;
1532
1533 /*
1534 * Try to use previously received scan results, if they are
1535 * recent enough to use for a connection.
1536 */
1537 if (wpa_s->last_scan_res_used > 0) {
1538 struct os_reltime now;
1539
1540 os_get_reltime(&now);
1541 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1542 wpa_printf(MSG_DEBUG,
1543 "WNM: Try to use recent scan results");
1544 if (wnm_scan_process(wpa_s, 0) > 0)
1545 return;
1546 wpa_printf(MSG_DEBUG,
1547 "WNM: No match in previous scan results - try a new scan");
1548 }
1549 }
1550
1551 wnm_set_scan_freqs(wpa_s);
1552 if (wpa_s->wnm_num_neighbor_report == 1) {
1553 os_memcpy(wpa_s->next_scan_bssid,
1554 wpa_s->wnm_neighbor_report_elements[0].bssid,
1555 ETH_ALEN);
1556 wpa_printf(MSG_DEBUG,
1557 "WNM: Scan only for a specific BSSID since there is only a single candidate "
1558 MACSTR, MAC2STR(wpa_s->next_scan_bssid));
1559 }
1560 wpa_supplicant_req_scan(wpa_s, 0, 0);
1561 } else if (reply) {
1562 enum bss_trans_mgmt_status_code status;
1563 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1564 status = WNM_BSS_TM_ACCEPT;
1565 else {
1566 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1567 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1568 }
1569 wnm_send_bss_transition_mgmt_resp(
1570 wpa_s, wpa_s->wnm_dialog_token, status,
1571 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1572 }
1573 }
1574
1575
1576 #define BTM_QUERY_MIN_SIZE 4
1577
wnm_send_bss_transition_mgmt_query(struct wpa_supplicant * wpa_s,u8 query_reason,const char * btm_candidates,int cand_list)1578 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
1579 u8 query_reason,
1580 const char *btm_candidates,
1581 int cand_list)
1582 {
1583 struct wpabuf *buf;
1584 int ret;
1585
1586 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
1587 MACSTR " query_reason=%u%s",
1588 MAC2STR(wpa_s->bssid), query_reason,
1589 cand_list ? " candidate list" : "");
1590
1591 buf = wpabuf_alloc(BTM_QUERY_MIN_SIZE);
1592 if (!buf)
1593 return -1;
1594
1595 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1596 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_QUERY);
1597 wpabuf_put_u8(buf, 1);
1598 wpabuf_put_u8(buf, query_reason);
1599
1600 if (cand_list)
1601 wnm_add_cand_list(wpa_s, &buf);
1602
1603 if (btm_candidates) {
1604 const size_t max_len = 1000;
1605
1606 ret = wpabuf_resize(&buf, max_len);
1607 if (ret < 0) {
1608 wpabuf_free(buf);
1609 return ret;
1610 }
1611
1612 ret = ieee802_11_parse_candidate_list(btm_candidates,
1613 wpabuf_put(buf, 0),
1614 max_len);
1615 if (ret < 0) {
1616 wpabuf_free(buf);
1617 return ret;
1618 }
1619
1620 wpabuf_put(buf, ret);
1621 }
1622
1623 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1624 wpa_s->own_addr, wpa_s->bssid,
1625 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1626
1627 wpabuf_free(buf);
1628 return ret;
1629 }
1630
1631
ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * data,int len)1632 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1633 const u8 *sa, const u8 *data,
1634 int len)
1635 {
1636 const u8 *pos, *end, *next;
1637 u8 ie, ie_len;
1638
1639 pos = data;
1640 end = data + len;
1641
1642 while (end - pos > 1) {
1643 ie = *pos++;
1644 ie_len = *pos++;
1645 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1646 ie, ie_len);
1647 if (ie_len > end - pos) {
1648 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1649 "subelement");
1650 break;
1651 }
1652 next = pos + ie_len;
1653 if (ie_len < 4) {
1654 pos = next;
1655 continue;
1656 }
1657 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1658 WPA_GET_BE24(pos), pos[3]);
1659
1660 #ifdef CONFIG_HS20
1661 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1662 WPA_GET_BE24(pos) == OUI_WFA &&
1663 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1664 /* Subscription Remediation subelement */
1665 const u8 *ie_end;
1666 u8 url_len;
1667 char *url;
1668 u8 osu_method;
1669
1670 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1671 "subelement");
1672 ie_end = pos + ie_len;
1673 pos += 4;
1674 url_len = *pos++;
1675 if (url_len == 0) {
1676 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1677 url = NULL;
1678 osu_method = 1;
1679 } else {
1680 if (url_len + 1 > ie_end - pos) {
1681 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1682 url_len,
1683 (int) (ie_end - pos));
1684 break;
1685 }
1686 url = os_malloc(url_len + 1);
1687 if (url == NULL)
1688 break;
1689 os_memcpy(url, pos, url_len);
1690 url[url_len] = '\0';
1691 osu_method = pos[url_len];
1692 }
1693 hs20_rx_subscription_remediation(wpa_s, url,
1694 osu_method);
1695 os_free(url);
1696 pos = next;
1697 continue;
1698 }
1699
1700 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1701 WPA_GET_BE24(pos) == OUI_WFA &&
1702 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1703 const u8 *ie_end;
1704 u8 url_len;
1705 char *url;
1706 u8 code;
1707 u16 reauth_delay;
1708
1709 ie_end = pos + ie_len;
1710 pos += 4;
1711 code = *pos++;
1712 reauth_delay = WPA_GET_LE16(pos);
1713 pos += 2;
1714 url_len = *pos++;
1715 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1716 "Imminent - Reason Code %u "
1717 "Re-Auth Delay %u URL Length %u",
1718 code, reauth_delay, url_len);
1719 if (url_len > ie_end - pos)
1720 break;
1721 url = os_malloc(url_len + 1);
1722 if (url == NULL)
1723 break;
1724 os_memcpy(url, pos, url_len);
1725 url[url_len] = '\0';
1726 hs20_rx_deauth_imminent_notice(wpa_s, code,
1727 reauth_delay, url);
1728 os_free(url);
1729 pos = next;
1730 continue;
1731 }
1732
1733 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1734 WPA_GET_BE24(pos) == OUI_WFA &&
1735 pos[3] == HS20_WNM_T_C_ACCEPTANCE) {
1736 const u8 *ie_end;
1737 u8 url_len;
1738 char *url;
1739
1740 ie_end = pos + ie_len;
1741 pos += 4;
1742 url_len = *pos++;
1743 wpa_printf(MSG_DEBUG,
1744 "WNM: HS 2.0 Terms and Conditions Acceptance (URL Length %u)",
1745 url_len);
1746 if (url_len > ie_end - pos)
1747 break;
1748 url = os_malloc(url_len + 1);
1749 if (!url)
1750 break;
1751 os_memcpy(url, pos, url_len);
1752 url[url_len] = '\0';
1753 hs20_rx_t_c_acceptance(wpa_s, url);
1754 os_free(url);
1755 pos = next;
1756 continue;
1757 }
1758 #endif /* CONFIG_HS20 */
1759
1760 pos = next;
1761 }
1762 }
1763
1764
ieee802_11_rx_wnm_notif_req(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * frm,int len)1765 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1766 const u8 *sa, const u8 *frm, int len)
1767 {
1768 const u8 *pos, *end;
1769 u8 dialog_token, type;
1770
1771 /* Dialog Token [1] | Type [1] | Subelements */
1772
1773 if (len < 2 || sa == NULL)
1774 return;
1775 end = frm + len;
1776 pos = frm;
1777 dialog_token = *pos++;
1778 type = *pos++;
1779
1780 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1781 "(dialog_token %u type %u sa " MACSTR ")",
1782 dialog_token, type, MAC2STR(sa));
1783 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1784 pos, end - pos);
1785
1786 if (wpa_s->wpa_state != WPA_COMPLETED ||
1787 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1788 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1789 "from our AP - ignore it");
1790 return;
1791 }
1792
1793 switch (type) {
1794 case 1:
1795 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1796 break;
1797 default:
1798 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1799 "WNM-Notification type %u", type);
1800 break;
1801 }
1802 }
1803
1804
ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * frm,int len)1805 static void ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant *wpa_s,
1806 const u8 *sa, const u8 *frm,
1807 int len)
1808 {
1809 u8 dialog_token, req_info, auto_report, timeout;
1810
1811 if (!wpa_s->conf->coloc_intf_reporting)
1812 return;
1813
1814 /* Dialog Token [1] | Request Info [1] */
1815
1816 if (len < 2)
1817 return;
1818 dialog_token = frm[0];
1819 req_info = frm[1];
1820 auto_report = req_info & 0x03;
1821 timeout = req_info >> 2;
1822
1823 wpa_dbg(wpa_s, MSG_DEBUG,
1824 "WNM: Received Collocated Interference Request (dialog_token %u auto_report %u timeout %u sa " MACSTR ")",
1825 dialog_token, auto_report, timeout, MAC2STR(sa));
1826
1827 if (dialog_token == 0)
1828 return; /* only nonzero values are used for request */
1829
1830 if (wpa_s->wpa_state != WPA_COMPLETED ||
1831 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1832 wpa_dbg(wpa_s, MSG_DEBUG,
1833 "WNM: Collocated Interference Request frame not from current AP - ignore it");
1834 return;
1835 }
1836
1837 wpa_msg(wpa_s, MSG_INFO, COLOC_INTF_REQ "%u %u %u",
1838 dialog_token, auto_report, timeout);
1839 wpa_s->coloc_intf_dialog_token = dialog_token;
1840 wpa_s->coloc_intf_auto_report = auto_report;
1841 wpa_s->coloc_intf_timeout = timeout;
1842 }
1843
1844
ieee802_11_rx_wnm_action(struct wpa_supplicant * wpa_s,const struct ieee80211_mgmt * mgmt,size_t len)1845 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1846 const struct ieee80211_mgmt *mgmt, size_t len)
1847 {
1848 const u8 *pos, *end;
1849 u8 act;
1850
1851 if (len < IEEE80211_HDRLEN + 2)
1852 return;
1853
1854 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1855 act = *pos++;
1856 end = ((const u8 *) mgmt) + len;
1857
1858 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1859 act, MAC2STR(mgmt->sa));
1860 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1861 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1862 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1863 "frame");
1864 return;
1865 }
1866
1867 switch (act) {
1868 case WNM_BSS_TRANS_MGMT_REQ:
1869 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1870 !(mgmt->da[0] & 0x01));
1871 break;
1872 case WNM_SLEEP_MODE_RESP:
1873 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1874 break;
1875 case WNM_NOTIFICATION_REQ:
1876 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1877 break;
1878 case WNM_COLLOCATED_INTERFERENCE_REQ:
1879 ieee802_11_rx_wnm_coloc_intf_req(wpa_s, mgmt->sa, pos,
1880 end - pos);
1881 break;
1882 default:
1883 wpa_printf(MSG_ERROR, "WNM: Unknown request");
1884 break;
1885 }
1886 }
1887
1888
wnm_send_coloc_intf_report(struct wpa_supplicant * wpa_s,u8 dialog_token,const struct wpabuf * elems)1889 int wnm_send_coloc_intf_report(struct wpa_supplicant *wpa_s, u8 dialog_token,
1890 const struct wpabuf *elems)
1891 {
1892 struct wpabuf *buf;
1893 int ret;
1894
1895 if (wpa_s->wpa_state < WPA_ASSOCIATED || !elems)
1896 return -1;
1897
1898 wpa_printf(MSG_DEBUG, "WNM: Send Collocated Interference Report to "
1899 MACSTR " (dialog token %u)",
1900 MAC2STR(wpa_s->bssid), dialog_token);
1901
1902 buf = wpabuf_alloc(3 + wpabuf_len(elems));
1903 if (!buf)
1904 return -1;
1905
1906 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1907 wpabuf_put_u8(buf, WNM_COLLOCATED_INTERFERENCE_REPORT);
1908 wpabuf_put_u8(buf, dialog_token);
1909 wpabuf_put_buf(buf, elems);
1910
1911 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1912 wpa_s->own_addr, wpa_s->bssid,
1913 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1914 wpabuf_free(buf);
1915 return ret;
1916 }
1917
1918
wnm_set_coloc_intf_elems(struct wpa_supplicant * wpa_s,struct wpabuf * elems)1919 void wnm_set_coloc_intf_elems(struct wpa_supplicant *wpa_s,
1920 struct wpabuf *elems)
1921 {
1922 wpabuf_free(wpa_s->coloc_intf_elems);
1923 if (elems && wpabuf_len(elems) == 0) {
1924 wpabuf_free(elems);
1925 elems = NULL;
1926 }
1927 wpa_s->coloc_intf_elems = elems;
1928
1929 if (wpa_s->conf->coloc_intf_reporting && wpa_s->coloc_intf_elems &&
1930 wpa_s->coloc_intf_dialog_token &&
1931 (wpa_s->coloc_intf_auto_report == 1 ||
1932 wpa_s->coloc_intf_auto_report == 3)) {
1933 /* TODO: Check that there has not been less than
1934 * wpa_s->coloc_intf_timeout * 200 TU from the last report.
1935 */
1936 wnm_send_coloc_intf_report(wpa_s,
1937 wpa_s->coloc_intf_dialog_token,
1938 wpa_s->coloc_intf_elems);
1939 }
1940 }
1941
1942
wnm_clear_coloc_intf_reporting(struct wpa_supplicant * wpa_s)1943 void wnm_clear_coloc_intf_reporting(struct wpa_supplicant *wpa_s)
1944 {
1945 #ifdef CONFIG_WNM
1946 wpa_s->coloc_intf_dialog_token = 0;
1947 wpa_s->coloc_intf_auto_report = 0;
1948 #endif /* CONFIG_WNM */
1949 }
1950