Line data Source code
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/wpa_ctrl.h"
14 : #include "rsn_supp/wpa.h"
15 : #include "wpa_supplicant_i.h"
16 : #include "driver_i.h"
17 : #include "scan.h"
18 : #include "ctrl_iface.h"
19 : #include "bss.h"
20 : #include "wnm_sta.h"
21 : #include "hs20_supplicant.h"
22 :
23 : #define MAX_TFS_IE_LEN 1024
24 : #define WNM_MAX_NEIGHBOR_REPORT 10
25 :
26 :
27 : /* get the TFS IE from driver */
28 9 : static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
29 : u16 *buf_len, enum wnm_oper oper)
30 : {
31 9 : wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
32 :
33 9 : return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
34 : }
35 :
36 :
37 : /* set the TFS IE to driver */
38 0 : static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
39 : const u8 *addr, u8 *buf, u16 *buf_len,
40 : enum wnm_oper oper)
41 : {
42 0 : wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
43 :
44 0 : return wpa_drv_wnm_oper(wpa_s, oper, addr, buf, buf_len);
45 : }
46 :
47 :
48 : /* MLME-SLEEPMODE.request */
49 10 : int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
50 : u8 action, u16 intval, struct wpabuf *tfs_req)
51 : {
52 : struct ieee80211_mgmt *mgmt;
53 : int res;
54 : size_t len;
55 : struct wnm_sleep_element *wnmsleep_ie;
56 : u8 *wnmtfs_ie;
57 : u8 wnmsleep_ie_len;
58 : u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
59 10 : enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
60 : WNM_SLEEP_TFS_REQ_IE_NONE;
61 :
62 60 : wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
63 : "action=%s to " MACSTR,
64 : action == 0 ? "enter" : "exit",
65 60 : MAC2STR(wpa_s->bssid));
66 :
67 : /* WNM-Sleep Mode IE */
68 10 : wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
69 10 : wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
70 10 : if (wnmsleep_ie == NULL)
71 0 : return -1;
72 10 : wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
73 10 : wnmsleep_ie->len = wnmsleep_ie_len - 2;
74 10 : wnmsleep_ie->action_type = action;
75 10 : wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
76 10 : wnmsleep_ie->intval = host_to_le16(intval);
77 10 : wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
78 : (u8 *) wnmsleep_ie, wnmsleep_ie_len);
79 :
80 : /* TFS IE(s) */
81 10 : if (tfs_req) {
82 1 : wnmtfs_ie_len = wpabuf_len(tfs_req);
83 1 : wnmtfs_ie = os_malloc(wnmtfs_ie_len);
84 1 : if (wnmtfs_ie == NULL) {
85 0 : os_free(wnmsleep_ie);
86 0 : return -1;
87 : }
88 1 : os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
89 : } else {
90 9 : wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
91 9 : if (wnmtfs_ie == NULL) {
92 0 : os_free(wnmsleep_ie);
93 0 : return -1;
94 : }
95 9 : if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
96 : tfs_oper)) {
97 9 : wnmtfs_ie_len = 0;
98 9 : os_free(wnmtfs_ie);
99 9 : wnmtfs_ie = NULL;
100 : }
101 : }
102 10 : wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
103 : (u8 *) wnmtfs_ie, wnmtfs_ie_len);
104 :
105 10 : mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
106 10 : if (mgmt == NULL) {
107 0 : wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
108 : "WNM-Sleep Request action frame");
109 0 : os_free(wnmsleep_ie);
110 0 : os_free(wnmtfs_ie);
111 0 : return -1;
112 : }
113 :
114 10 : os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
115 10 : os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
116 10 : os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
117 10 : mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
118 : WLAN_FC_STYPE_ACTION);
119 10 : mgmt->u.action.category = WLAN_ACTION_WNM;
120 10 : mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
121 10 : mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
122 10 : os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
123 : wnmsleep_ie_len);
124 : /* copy TFS IE here */
125 10 : if (wnmtfs_ie_len > 0) {
126 1 : os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
127 : wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
128 : }
129 :
130 10 : len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
131 : wnmtfs_ie_len;
132 :
133 10 : res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
134 10 : wpa_s->own_addr, wpa_s->bssid,
135 10 : &mgmt->u.action.category, len, 0);
136 10 : if (res < 0)
137 0 : wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
138 : "(action=%d, intval=%d)", action, intval);
139 :
140 10 : os_free(wnmsleep_ie);
141 10 : os_free(wnmtfs_ie);
142 10 : os_free(mgmt);
143 :
144 10 : return res;
145 : }
146 :
147 :
148 5 : static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
149 : u8 *tfsresp_ie_start,
150 : u8 *tfsresp_ie_end)
151 : {
152 5 : wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
153 5 : wpa_s->bssid, NULL, NULL);
154 : /* remove GTK/IGTK ?? */
155 :
156 : /* set the TFS Resp IE(s) */
157 5 : if (tfsresp_ie_start && tfsresp_ie_end &&
158 0 : tfsresp_ie_end - tfsresp_ie_start >= 0) {
159 : u16 tfsresp_ie_len;
160 0 : tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
161 : tfsresp_ie_start;
162 0 : wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
163 : /* pass the TFS Resp IE(s) to driver for processing */
164 0 : if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
165 : tfsresp_ie_start,
166 : &tfsresp_ie_len,
167 : WNM_SLEEP_TFS_RESP_IE_SET))
168 0 : wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
169 : }
170 5 : }
171 :
172 :
173 5 : static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
174 : const u8 *frm, u16 key_len_total)
175 : {
176 : u8 *ptr, *end;
177 : u8 gtk_len;
178 :
179 5 : wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
180 : NULL, NULL);
181 :
182 : /* Install GTK/IGTK */
183 :
184 : /* point to key data field */
185 5 : ptr = (u8 *) frm + 1 + 2;
186 5 : end = ptr + key_len_total;
187 5 : wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
188 :
189 5 : while (ptr + 1 < end) {
190 2 : if (ptr + 2 + ptr[1] > end) {
191 0 : wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
192 : "length");
193 0 : if (end > ptr) {
194 0 : wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
195 0 : ptr, end - ptr);
196 : }
197 0 : break;
198 : }
199 2 : if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
200 1 : if (ptr[1] < 11 + 5) {
201 0 : wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
202 : "subelem");
203 0 : break;
204 : }
205 1 : gtk_len = *(ptr + 4);
206 1 : if (ptr[1] < 11 + gtk_len ||
207 1 : gtk_len < 5 || gtk_len > 32) {
208 0 : wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
209 : "subelem");
210 0 : break;
211 : }
212 1 : wpa_wnmsleep_install_key(
213 : wpa_s->wpa,
214 : WNM_SLEEP_SUBELEM_GTK,
215 : ptr);
216 1 : ptr += 13 + gtk_len;
217 : #ifdef CONFIG_IEEE80211W
218 1 : } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
219 1 : if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
220 0 : wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
221 : "subelem");
222 0 : break;
223 : }
224 1 : wpa_wnmsleep_install_key(wpa_s->wpa,
225 : WNM_SLEEP_SUBELEM_IGTK, ptr);
226 1 : ptr += 10 + WPA_IGTK_LEN;
227 : #endif /* CONFIG_IEEE80211W */
228 : } else
229 0 : break; /* skip the loop */
230 : }
231 5 : }
232 :
233 :
234 10 : static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
235 : const u8 *frm, int len)
236 : {
237 : /*
238 : * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
239 : * WNM-Sleep Mode IE | TFS Response IE
240 : */
241 10 : u8 *pos = (u8 *) frm; /* point to payload after the action field */
242 : u16 key_len_total;
243 10 : struct wnm_sleep_element *wnmsleep_ie = NULL;
244 : /* multiple TFS Resp IE (assuming consecutive) */
245 10 : u8 *tfsresp_ie_start = NULL;
246 10 : u8 *tfsresp_ie_end = NULL;
247 :
248 10 : if (len < 3)
249 0 : return;
250 10 : key_len_total = WPA_GET_LE16(frm + 1);
251 :
252 20 : wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
253 10 : frm[0], key_len_total);
254 10 : pos += 3 + key_len_total;
255 10 : if (pos > frm + len) {
256 0 : wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
257 0 : return;
258 : }
259 30 : while (pos - frm < len) {
260 10 : u8 ie_len = *(pos + 1);
261 10 : if (pos + 2 + ie_len > frm + len) {
262 0 : wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
263 0 : break;
264 : }
265 10 : wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
266 10 : if (*pos == WLAN_EID_WNMSLEEP)
267 10 : wnmsleep_ie = (struct wnm_sleep_element *) pos;
268 0 : else if (*pos == WLAN_EID_TFS_RESP) {
269 0 : if (!tfsresp_ie_start)
270 0 : tfsresp_ie_start = pos;
271 0 : tfsresp_ie_end = pos;
272 : } else
273 0 : wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
274 10 : pos += ie_len + 2;
275 : }
276 :
277 10 : if (!wnmsleep_ie) {
278 0 : wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
279 0 : return;
280 : }
281 :
282 10 : if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
283 0 : wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
284 20 : wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
285 : "frame (action=%d, intval=%d)",
286 20 : wnmsleep_ie->action_type, wnmsleep_ie->intval);
287 20 : if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
288 5 : wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
289 : tfsresp_ie_end);
290 5 : } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
291 5 : wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
292 : }
293 : } else {
294 0 : wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
295 : "(action=%d, intval=%d)",
296 0 : wnmsleep_ie->action_type, wnmsleep_ie->intval);
297 0 : if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
298 0 : wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
299 0 : wpa_s->bssid, NULL, NULL);
300 0 : else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
301 0 : wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
302 0 : wpa_s->bssid, NULL, NULL);
303 : }
304 : }
305 :
306 :
307 84 : void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
308 : {
309 : int i;
310 :
311 89 : for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
312 5 : os_free(wpa_s->wnm_neighbor_report_elements[i].tsf_info);
313 5 : os_free(wpa_s->wnm_neighbor_report_elements[i].con_coun_str);
314 5 : os_free(wpa_s->wnm_neighbor_report_elements[i].bss_tran_can);
315 5 : os_free(wpa_s->wnm_neighbor_report_elements[i].bss_term_dur);
316 5 : os_free(wpa_s->wnm_neighbor_report_elements[i].bearing);
317 5 : os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
318 5 : os_free(wpa_s->wnm_neighbor_report_elements[i].rrm_cap);
319 5 : os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
320 : }
321 :
322 84 : wpa_s->wnm_num_neighbor_report = 0;
323 84 : os_free(wpa_s->wnm_neighbor_report_elements);
324 84 : wpa_s->wnm_neighbor_report_elements = NULL;
325 84 : }
326 :
327 :
328 24 : static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
329 : u8 id, u8 elen, const u8 *pos)
330 : {
331 24 : switch (id) {
332 : case WNM_NEIGHBOR_TSF:
333 3 : if (elen < 2 + 2) {
334 1 : wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
335 1 : break;
336 : }
337 2 : os_free(rep->tsf_info);
338 2 : rep->tsf_info = os_zalloc(sizeof(struct tsf_info));
339 2 : if (rep->tsf_info == NULL)
340 0 : break;
341 2 : os_memcpy(rep->tsf_info->tsf_offset, pos, 2);
342 2 : os_memcpy(rep->tsf_info->beacon_interval, pos + 2, 2);
343 2 : break;
344 : case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
345 3 : if (elen < 2) {
346 1 : wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
347 : "country string");
348 1 : break;
349 : }
350 2 : os_free(rep->con_coun_str);
351 2 : rep->con_coun_str =
352 2 : os_zalloc(sizeof(struct condensed_country_string));
353 2 : if (rep->con_coun_str == NULL)
354 0 : break;
355 2 : os_memcpy(rep->con_coun_str->country_string, pos, 2);
356 2 : break;
357 : case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
358 3 : if (elen < 1) {
359 1 : wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
360 : "candidate");
361 1 : break;
362 : }
363 2 : os_free(rep->bss_tran_can);
364 2 : rep->bss_tran_can =
365 2 : os_zalloc(sizeof(struct bss_transition_candidate));
366 2 : if (rep->bss_tran_can == NULL)
367 0 : break;
368 2 : rep->bss_tran_can->preference = pos[0];
369 2 : break;
370 : case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
371 3 : if (elen < 10) {
372 1 : wpa_printf(MSG_DEBUG, "WNM: Too short BSS termination "
373 : "duration");
374 1 : break;
375 : }
376 2 : os_free(rep->bss_term_dur);
377 2 : rep->bss_term_dur =
378 2 : os_zalloc(sizeof(struct bss_termination_duration));
379 2 : if (rep->bss_term_dur == NULL)
380 0 : break;
381 2 : os_memcpy(rep->bss_term_dur->duration, pos, 10);
382 2 : break;
383 : case WNM_NEIGHBOR_BEARING:
384 3 : if (elen < 8) {
385 1 : wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
386 : "bearing");
387 1 : break;
388 : }
389 2 : os_free(rep->bearing);
390 2 : rep->bearing = os_zalloc(sizeof(struct bearing));
391 2 : if (rep->bearing == NULL)
392 0 : break;
393 2 : os_memcpy(rep->bearing->bearing, pos, 8);
394 2 : break;
395 : case WNM_NEIGHBOR_MEASUREMENT_PILOT:
396 3 : if (elen < 1) {
397 1 : wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
398 : "pilot");
399 1 : break;
400 : }
401 2 : os_free(rep->meas_pilot);
402 2 : rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
403 2 : if (rep->meas_pilot == NULL)
404 0 : break;
405 2 : rep->meas_pilot->measurement_pilot = pos[0];
406 2 : rep->meas_pilot->subelem_len = elen - 1;
407 2 : os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
408 2 : break;
409 : case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
410 3 : if (elen < 5) {
411 1 : wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
412 : "capabilities");
413 1 : break;
414 : }
415 2 : os_free(rep->rrm_cap);
416 2 : rep->rrm_cap =
417 2 : os_zalloc(sizeof(struct rrm_enabled_capabilities));
418 2 : if (rep->rrm_cap == NULL)
419 0 : break;
420 2 : os_memcpy(rep->rrm_cap->capabilities, pos, 5);
421 2 : break;
422 : case WNM_NEIGHBOR_MULTIPLE_BSSID:
423 3 : if (elen < 1) {
424 1 : wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
425 1 : break;
426 : }
427 2 : os_free(rep->mul_bssid);
428 2 : rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
429 2 : if (rep->mul_bssid == NULL)
430 0 : break;
431 2 : rep->mul_bssid->max_bssid_indicator = pos[0];
432 2 : rep->mul_bssid->subelem_len = elen - 1;
433 2 : os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
434 2 : break;
435 : }
436 24 : }
437 :
438 :
439 5 : static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
440 : const u8 *pos, u8 len,
441 : struct neighbor_report *rep)
442 : {
443 5 : u8 left = len;
444 :
445 5 : if (left < 13) {
446 1 : wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
447 6 : return;
448 : }
449 :
450 4 : os_memcpy(rep->bssid, pos, ETH_ALEN);
451 4 : os_memcpy(rep->bssid_information, pos + ETH_ALEN, 4);
452 4 : rep->regulatory_class = *(pos + 10);
453 4 : rep->channel_number = *(pos + 11);
454 4 : rep->phy_type = *(pos + 12);
455 :
456 4 : pos += 13;
457 4 : left -= 13;
458 :
459 32 : while (left >= 2) {
460 : u8 id, elen;
461 :
462 25 : id = *pos++;
463 25 : elen = *pos++;
464 25 : wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
465 25 : left -= 2;
466 25 : if (elen > left) {
467 1 : wpa_printf(MSG_DEBUG,
468 : "WNM: Truncated neighbor report subelement");
469 1 : break;
470 : }
471 24 : wnm_parse_neighbor_report_elem(rep, id, elen, pos);
472 24 : left -= elen;
473 24 : pos += elen;
474 : }
475 : }
476 :
477 :
478 6 : static int compare_scan_neighbor_results(struct wpa_supplicant *wpa_s,
479 : struct wpa_scan_results *scan_res,
480 : struct neighbor_report *neigh_rep,
481 : u8 num_neigh_rep, u8 *bssid_to_connect)
482 : {
483 :
484 : u8 i, j;
485 :
486 6 : if (scan_res == NULL || num_neigh_rep == 0 || !wpa_s->current_bss)
487 1 : return 0;
488 :
489 35 : wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
490 35 : MAC2STR(wpa_s->bssid), wpa_s->current_bss->level);
491 :
492 10 : for (i = 0; i < num_neigh_rep; i++) {
493 15 : for (j = 0; j < scan_res->num; j++) {
494 : /* Check for a better RSSI AP */
495 10 : if (os_memcmp(scan_res->res[j]->bssid,
496 0 : neigh_rep[i].bssid, ETH_ALEN) == 0 &&
497 0 : scan_res->res[j]->level >
498 0 : wpa_s->current_bss->level) {
499 : /* Got a BSSID with better RSSI value */
500 0 : os_memcpy(bssid_to_connect, neigh_rep[i].bssid,
501 : ETH_ALEN);
502 0 : wpa_printf(MSG_DEBUG, "Found a BSS " MACSTR
503 : " with better scan RSSI %d",
504 0 : MAC2STR(scan_res->res[j]->bssid),
505 0 : scan_res->res[j]->level);
506 0 : return 1;
507 : }
508 70 : wpa_printf(MSG_DEBUG, "scan_res[%d] " MACSTR
509 : " RSSI %d", j,
510 60 : MAC2STR(scan_res->res[j]->bssid),
511 10 : scan_res->res[j]->level);
512 : }
513 : }
514 :
515 5 : return 0;
516 : }
517 :
518 :
519 16 : static void wnm_send_bss_transition_mgmt_resp(
520 : struct wpa_supplicant *wpa_s, u8 dialog_token,
521 : enum bss_trans_mgmt_status_code status, u8 delay,
522 : const u8 *target_bssid)
523 : {
524 : u8 buf[1000], *pos;
525 : struct ieee80211_mgmt *mgmt;
526 : size_t len;
527 :
528 112 : wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
529 : "to " MACSTR " dialog_token=%u status=%u delay=%d",
530 96 : MAC2STR(wpa_s->bssid), dialog_token, status, delay);
531 :
532 16 : mgmt = (struct ieee80211_mgmt *) buf;
533 16 : os_memset(&buf, 0, sizeof(buf));
534 16 : os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
535 16 : os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
536 16 : os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
537 16 : mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
538 : WLAN_FC_STYPE_ACTION);
539 16 : mgmt->u.action.category = WLAN_ACTION_WNM;
540 16 : mgmt->u.action.u.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
541 16 : mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
542 16 : mgmt->u.action.u.bss_tm_resp.status_code = status;
543 16 : mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
544 16 : pos = mgmt->u.action.u.bss_tm_resp.variable;
545 16 : if (target_bssid) {
546 0 : os_memcpy(pos, target_bssid, ETH_ALEN);
547 0 : pos += ETH_ALEN;
548 16 : } else if (status == WNM_BSS_TM_ACCEPT) {
549 : /*
550 : * P802.11-REVmc clarifies that the Target BSSID field is always
551 : * present when status code is zero, so use a fake value here if
552 : * no BSSID is yet known.
553 : */
554 5 : os_memset(pos, 0, ETH_ALEN);
555 5 : pos += ETH_ALEN;
556 : }
557 :
558 16 : len = pos - (u8 *) &mgmt->u.action.category;
559 :
560 16 : wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
561 16 : wpa_s->own_addr, wpa_s->bssid,
562 16 : &mgmt->u.action.category, len, 0);
563 16 : }
564 :
565 :
566 6 : void wnm_scan_response(struct wpa_supplicant *wpa_s,
567 : struct wpa_scan_results *scan_res)
568 : {
569 : u8 bssid[ETH_ALEN];
570 :
571 6 : if (scan_res == NULL) {
572 0 : wpa_printf(MSG_ERROR, "Scan result is NULL");
573 0 : goto send_bss_resp_fail;
574 : }
575 :
576 : /* Compare the Neighbor Report and scan results */
577 6 : if (compare_scan_neighbor_results(wpa_s, scan_res,
578 : wpa_s->wnm_neighbor_report_elements,
579 6 : wpa_s->wnm_num_neighbor_report,
580 : bssid) == 1) {
581 : /* Associate to the network */
582 : struct wpa_bss *bss;
583 0 : struct wpa_ssid *ssid = wpa_s->current_ssid;
584 :
585 0 : bss = wpa_bss_get_bssid(wpa_s, bssid);
586 0 : if (!bss) {
587 0 : wpa_printf(MSG_DEBUG, "WNM: Target AP not found from "
588 : "BSS table");
589 0 : goto send_bss_resp_fail;
590 : }
591 :
592 : /* Send the BSS Management Response - Accept */
593 0 : if (wpa_s->wnm_reply) {
594 0 : wnm_send_bss_transition_mgmt_resp(wpa_s,
595 0 : wpa_s->wnm_dialog_token,
596 : WNM_BSS_TM_ACCEPT,
597 : 0, bssid);
598 : }
599 :
600 0 : wpa_s->reassociate = 1;
601 0 : wpa_supplicant_connect(wpa_s, bss, ssid);
602 0 : wnm_deallocate_memory(wpa_s);
603 0 : return;
604 : }
605 :
606 : /* Send reject response for all the failures */
607 : send_bss_resp_fail:
608 6 : wnm_deallocate_memory(wpa_s);
609 6 : if (wpa_s->wnm_reply) {
610 6 : wnm_send_bss_transition_mgmt_resp(wpa_s,
611 6 : wpa_s->wnm_dialog_token,
612 : WNM_BSS_TM_REJECT_UNSPECIFIED,
613 : 0, NULL);
614 : }
615 6 : return;
616 : }
617 :
618 :
619 21 : static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
620 : const u8 *pos, const u8 *end,
621 : int reply)
622 : {
623 21 : if (pos + 5 > end)
624 1 : return;
625 :
626 20 : wpa_s->wnm_dialog_token = pos[0];
627 20 : wpa_s->wnm_mode = pos[1];
628 20 : wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
629 20 : wpa_s->wnm_validity_interval = pos[4];
630 20 : wpa_s->wnm_reply = reply;
631 :
632 80 : wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
633 : "dialog_token=%u request_mode=0x%x "
634 : "disassoc_timer=%u validity_interval=%u",
635 40 : wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
636 40 : wpa_s->wnm_dissoc_timer, wpa_s->wnm_validity_interval);
637 :
638 20 : pos += 5;
639 :
640 20 : if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
641 2 : if (pos + 12 > end) {
642 1 : wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
643 1 : return;
644 : }
645 1 : os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
646 1 : pos += 12; /* BSS Termination Duration */
647 : }
648 :
649 19 : if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
650 : char url[256];
651 : unsigned int beacon_int;
652 :
653 7 : if (pos + 1 > end || pos + 1 + pos[0] > end) {
654 2 : wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
655 : "Management Request (URL)");
656 2 : return;
657 : }
658 5 : os_memcpy(url, pos + 1, pos[0]);
659 5 : url[pos[0]] = '\0';
660 5 : pos += 1 + pos[0];
661 :
662 5 : if (wpa_s->current_bss)
663 5 : beacon_int = wpa_s->current_bss->beacon_int;
664 : else
665 0 : beacon_int = 100; /* best guess */
666 :
667 5 : wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
668 : wpa_sm_pmf_enabled(wpa_s->wpa),
669 5 : wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
670 : }
671 :
672 17 : if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
673 6 : wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
674 6 : "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
675 6 : if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
676 : /* TODO: mark current BSS less preferred for
677 : * selection */
678 6 : wpa_printf(MSG_DEBUG, "Trying to find another BSS");
679 6 : wpa_supplicant_req_scan(wpa_s, 0, 0);
680 : }
681 : }
682 :
683 17 : if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
684 7 : wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
685 7 : wpa_s->wnm_num_neighbor_report = 0;
686 7 : os_free(wpa_s->wnm_neighbor_report_elements);
687 7 : wpa_s->wnm_neighbor_report_elements = os_zalloc(
688 : WNM_MAX_NEIGHBOR_REPORT *
689 : sizeof(struct neighbor_report));
690 7 : if (wpa_s->wnm_neighbor_report_elements == NULL)
691 0 : return;
692 :
693 25 : while (pos + 2 <= end &&
694 6 : wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
695 : {
696 6 : u8 tag = *pos++;
697 6 : u8 len = *pos++;
698 :
699 6 : wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
700 : tag);
701 6 : if (pos + len > end) {
702 1 : wpa_printf(MSG_DEBUG, "WNM: Truncated request");
703 1 : return;
704 : }
705 5 : if (tag == WLAN_EID_NEIGHBOR_REPORT) {
706 : struct neighbor_report *rep;
707 10 : rep = &wpa_s->wnm_neighbor_report_elements[
708 5 : wpa_s->wnm_num_neighbor_report];
709 5 : wnm_parse_neighbor_report(wpa_s, pos, len, rep);
710 : }
711 :
712 5 : pos += len;
713 5 : wpa_s->wnm_num_neighbor_report++;
714 : }
715 :
716 6 : wpa_s->scan_res_handler = wnm_scan_response;
717 6 : wpa_supplicant_req_scan(wpa_s, 0, 0);
718 10 : } else if (reply) {
719 : enum bss_trans_mgmt_status_code status;
720 10 : if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
721 5 : status = WNM_BSS_TM_ACCEPT;
722 : else {
723 5 : wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
724 5 : status = WNM_BSS_TM_REJECT_UNSPECIFIED;
725 : }
726 10 : wnm_send_bss_transition_mgmt_resp(wpa_s,
727 10 : wpa_s->wnm_dialog_token,
728 : status, 0, NULL);
729 : }
730 : }
731 :
732 :
733 1 : int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
734 : u8 query_reason)
735 : {
736 : u8 buf[1000], *pos;
737 : struct ieee80211_mgmt *mgmt;
738 : size_t len;
739 : int ret;
740 :
741 7 : wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
742 : MACSTR " query_reason=%u",
743 6 : MAC2STR(wpa_s->bssid), query_reason);
744 :
745 1 : mgmt = (struct ieee80211_mgmt *) buf;
746 1 : os_memset(&buf, 0, sizeof(buf));
747 1 : os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
748 1 : os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
749 1 : os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
750 1 : mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
751 : WLAN_FC_STYPE_ACTION);
752 1 : mgmt->u.action.category = WLAN_ACTION_WNM;
753 1 : mgmt->u.action.u.bss_tm_query.action = WNM_BSS_TRANS_MGMT_QUERY;
754 1 : mgmt->u.action.u.bss_tm_query.dialog_token = 1;
755 1 : mgmt->u.action.u.bss_tm_query.query_reason = query_reason;
756 1 : pos = mgmt->u.action.u.bss_tm_query.variable;
757 :
758 1 : len = pos - (u8 *) &mgmt->u.action.category;
759 :
760 1 : ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
761 1 : wpa_s->own_addr, wpa_s->bssid,
762 1 : &mgmt->u.action.category, len, 0);
763 :
764 1 : return ret;
765 : }
766 :
767 :
768 7 : static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
769 : const u8 *sa, const u8 *data,
770 : int len)
771 : {
772 : const u8 *pos, *end, *next;
773 : u8 ie, ie_len;
774 :
775 7 : pos = data;
776 7 : end = data + len;
777 :
778 21 : while (pos + 1 < end) {
779 7 : ie = *pos++;
780 7 : ie_len = *pos++;
781 7 : wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
782 : ie, ie_len);
783 7 : if (ie_len > end - pos) {
784 0 : wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
785 : "subelement");
786 0 : break;
787 : }
788 7 : next = pos + ie_len;
789 7 : if (ie_len < 4) {
790 0 : pos = next;
791 0 : continue;
792 : }
793 7 : wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
794 7 : WPA_GET_BE24(pos), pos[3]);
795 :
796 : #ifdef CONFIG_HS20
797 14 : if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
798 14 : WPA_GET_BE24(pos) == OUI_WFA &&
799 7 : pos[3] == HS20_WNM_SUB_REM_NEEDED) {
800 : /* Subscription Remediation subelement */
801 : const u8 *ie_end;
802 : u8 url_len;
803 : char *url;
804 : u8 osu_method;
805 :
806 4 : wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
807 : "subelement");
808 4 : ie_end = pos + ie_len;
809 4 : pos += 4;
810 4 : url_len = *pos++;
811 4 : if (url_len == 0) {
812 1 : wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
813 1 : url = NULL;
814 1 : osu_method = 1;
815 : } else {
816 3 : if (pos + url_len + 1 > ie_end) {
817 0 : wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
818 : url_len,
819 0 : (int) (ie_end - pos));
820 0 : break;
821 : }
822 3 : url = os_malloc(url_len + 1);
823 3 : if (url == NULL)
824 0 : break;
825 3 : os_memcpy(url, pos, url_len);
826 3 : url[url_len] = '\0';
827 3 : osu_method = pos[url_len];
828 : }
829 4 : hs20_rx_subscription_remediation(wpa_s, url,
830 : osu_method);
831 4 : os_free(url);
832 4 : pos = next;
833 4 : continue;
834 : }
835 :
836 6 : if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
837 6 : WPA_GET_BE24(pos) == OUI_WFA &&
838 3 : pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
839 : const u8 *ie_end;
840 : u8 url_len;
841 : char *url;
842 : u8 code;
843 : u16 reauth_delay;
844 :
845 3 : ie_end = pos + ie_len;
846 3 : pos += 4;
847 3 : code = *pos++;
848 3 : reauth_delay = WPA_GET_LE16(pos);
849 3 : pos += 2;
850 3 : url_len = *pos++;
851 3 : wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
852 : "Imminent - Reason Code %u "
853 : "Re-Auth Delay %u URL Length %u",
854 : code, reauth_delay, url_len);
855 3 : if (pos + url_len > ie_end)
856 0 : break;
857 3 : url = os_malloc(url_len + 1);
858 3 : if (url == NULL)
859 0 : break;
860 3 : os_memcpy(url, pos, url_len);
861 3 : url[url_len] = '\0';
862 3 : hs20_rx_deauth_imminent_notice(wpa_s, code,
863 : reauth_delay, url);
864 3 : os_free(url);
865 3 : pos = next;
866 3 : continue;
867 : }
868 : #endif /* CONFIG_HS20 */
869 :
870 0 : pos = next;
871 : }
872 7 : }
873 :
874 :
875 7 : static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
876 : const u8 *sa, const u8 *frm, int len)
877 : {
878 : const u8 *pos, *end;
879 : u8 dialog_token, type;
880 :
881 : /* Dialog Token [1] | Type [1] | Subelements */
882 :
883 7 : if (len < 2 || sa == NULL)
884 0 : return;
885 7 : end = frm + len;
886 7 : pos = frm;
887 7 : dialog_token = *pos++;
888 7 : type = *pos++;
889 :
890 7 : wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
891 : "(dialog_token %u type %u sa " MACSTR ")",
892 : dialog_token, type, MAC2STR(sa));
893 7 : wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
894 7 : pos, end - pos);
895 :
896 14 : if (wpa_s->wpa_state != WPA_COMPLETED ||
897 7 : os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
898 0 : wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
899 : "from our AP - ignore it");
900 0 : return;
901 : }
902 :
903 7 : switch (type) {
904 : case 1:
905 7 : ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
906 7 : break;
907 : default:
908 0 : wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
909 : "WNM-Notification type %u", type);
910 0 : break;
911 : }
912 : }
913 :
914 :
915 38 : void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
916 : const struct ieee80211_mgmt *mgmt, size_t len)
917 : {
918 : const u8 *pos, *end;
919 : u8 act;
920 :
921 38 : if (len < IEEE80211_HDRLEN + 2)
922 0 : return;
923 :
924 38 : pos = &mgmt->u.action.category;
925 38 : pos++;
926 38 : act = *pos++;
927 38 : end = ((const u8 *) mgmt) + len;
928 :
929 228 : wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
930 228 : act, MAC2STR(mgmt->sa));
931 76 : if (wpa_s->wpa_state < WPA_ASSOCIATED ||
932 38 : os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
933 0 : wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
934 : "frame");
935 0 : return;
936 : }
937 :
938 38 : switch (act) {
939 : case WNM_BSS_TRANS_MGMT_REQ:
940 21 : ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
941 21 : !(mgmt->da[0] & 0x01));
942 21 : break;
943 : case WNM_SLEEP_MODE_RESP:
944 10 : ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
945 10 : break;
946 : case WNM_NOTIFICATION_REQ:
947 7 : ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
948 7 : break;
949 : default:
950 0 : wpa_printf(MSG_ERROR, "WNM: Unknown request");
951 0 : break;
952 : }
953 : }
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