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tests: hostapd assocresp_elements
[thirdparty/hostap.git] / wpa_supplicant / wnm_sta.c
CommitLineData
75cad1a0
XC		 1/*
2 * wpa_supplicant - WNM
ae8535b6 3 * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
75cad1a0
XC		 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"
e1117c1c 13#include "common/ieee802_11_common.h"
ae8535b6 14#include "common/wpa_ctrl.h"
75cad1a0 15#include "rsn_supp/wpa.h"
61c54976
JM		 16#include "wpa_supplicant_i.h"
17#include "driver_i.h"
2049a875 18#include "scan.h"
e27d20bb
VK		 19#include "ctrl_iface.h"
20#include "bss.h"
21#include "wnm_sta.h"
95a3ea94 22#include "hs20_supplicant.h"
75cad1a0
XC		 23
24#define MAX_TFS_IE_LEN 1024
e27d20bb 25#define WNM_MAX_NEIGHBOR_REPORT 10
75cad1a0 26
75cad1a0
XC		 27
28/* get the TFS IE from driver */
29static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
30 u16 *buf_len, enum wnm_oper oper)
31{
32 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
33
34 return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
35}
36
37
38/* set the TFS IE to driver */
39static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
dacd789f 40 const u8 *addr, const u8 *buf, u16 buf_len,
75cad1a0
XC		 41 enum wnm_oper oper)
42{
dacd789f
JM		 43 u16 len = buf_len;
44
75cad1a0
XC		 45 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
46
dacd789f 47 return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
75cad1a0
XC		 48}
49
50
51/* MLME-SLEEPMODE.request */
52int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
cd0ef657 53 u8 action, u16 intval, struct wpabuf *tfs_req)
75cad1a0
XC		 54{
55 struct ieee80211_mgmt *mgmt;
56 int res;
57 size_t len;
58 struct wnm_sleep_element *wnmsleep_ie;
59 u8 *wnmtfs_ie;
60 u8 wnmsleep_ie_len;
61 u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
62 enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
63 WNM_SLEEP_TFS_REQ_IE_NONE;
64
cd0ef657
JM		 65 wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
66 "action=%s to " MACSTR,
67 action == 0 ? "enter" : "exit",
68 MAC2STR(wpa_s->bssid));
69
75cad1a0
XC		 70 /* WNM-Sleep Mode IE */
71 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
72 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
73 if (wnmsleep_ie == NULL)
74 return -1;
75 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
76 wnmsleep_ie->len = wnmsleep_ie_len - 2;
77 wnmsleep_ie->action_type = action;
78 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
e9199e31 79 wnmsleep_ie->intval = host_to_le16(intval);
cd0ef657
JM		 80 wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
81 (u8 *) wnmsleep_ie, wnmsleep_ie_len);
75cad1a0
XC		 82
83 /* TFS IE(s) */
cd0ef657
JM		 84 if (tfs_req) {
85 wnmtfs_ie_len = wpabuf_len(tfs_req);
86 wnmtfs_ie = os_malloc(wnmtfs_ie_len);
87 if (wnmtfs_ie == NULL) {
88 os_free(wnmsleep_ie);
89 return -1;
90 }
91 os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
92 } else {
93 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
94 if (wnmtfs_ie == NULL) {
95 os_free(wnmsleep_ie);
96 return -1;
97 }
98 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
99 tfs_oper)) {
100 wnmtfs_ie_len = 0;
101 os_free(wnmtfs_ie);
102 wnmtfs_ie = NULL;
103 }
75cad1a0 104 }
cd0ef657
JM		 105 wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
106 (u8 *) wnmtfs_ie, wnmtfs_ie_len);
75cad1a0
XC		 107
108 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
109 if (mgmt == NULL) {
110 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
111 "WNM-Sleep Request action frame");
14df897c
JM		 112 os_free(wnmsleep_ie);
113 os_free(wnmtfs_ie);
75cad1a0
XC		 114 return -1;
115 }
116
117 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
118 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
119 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
120 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
121 WLAN_FC_STYPE_ACTION);
122 mgmt->u.action.category = WLAN_ACTION_WNM;
123 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
e0c54a15 124 mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
75cad1a0
XC		 125 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
126 wnmsleep_ie_len);
127 /* copy TFS IE here */
128 if (wnmtfs_ie_len > 0) {
129 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
130 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
131 }
132
133 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
134 wnmtfs_ie_len;
135
136 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
137 wpa_s->own_addr, wpa_s->bssid,
138 &mgmt->u.action.category, len, 0);
139 if (res < 0)
140 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
141 "(action=%d, intval=%d)", action, intval);
03ed0a52
JM		 142 else
143 wpa_s->wnmsleep_used = 1;
75cad1a0
XC		 144
145 os_free(wnmsleep_ie);
146 os_free(wnmtfs_ie);
147 os_free(mgmt);
148
149 return res;
150}
151
152
74b4a360 153static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
dacd789f
JM		 154 const u8 *tfsresp_ie_start,
155 const u8 *tfsresp_ie_end)
74b4a360
JM		 156{
157 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
158 wpa_s->bssid, NULL, NULL);
159 /* remove GTK/IGTK ?? */
160
161 /* set the TFS Resp IE(s) */
162 if (tfsresp_ie_start && tfsresp_ie_end &&
163 tfsresp_ie_end - tfsresp_ie_start >= 0) {
164 u16 tfsresp_ie_len;
165 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
166 tfsresp_ie_start;
167 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
168 /* pass the TFS Resp IE(s) to driver for processing */
169 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
170 tfsresp_ie_start,
dacd789f 171 tfsresp_ie_len,
74b4a360
JM		 172 WNM_SLEEP_TFS_RESP_IE_SET))
173 wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
174 }
175}
176
177
178static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
179 const u8 *frm, u16 key_len_total)
180{
181 u8 *ptr, *end;
182 u8 gtk_len;
183
184 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
185 NULL, NULL);
186
187 /* Install GTK/IGTK */
188
189 /* point to key data field */
dbfb8e82 190 ptr = (u8 *) frm + 1 + 2;
74b4a360
JM		 191 end = ptr + key_len_total;
192 wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
193
2cb28a4c
JM		 194 if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
195 wpa_msg(wpa_s, MSG_INFO,
196 "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
197 return;
198 }
199
bdce45b8
JM		 200 while (end - ptr > 1) {
201 if (2 + ptr[1] > end - ptr) {
74b4a360
JM		 202 wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
203 "length");
204 if (end > ptr) {
205 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
206 ptr, end - ptr);
207 }
208 break;
209 }
210 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
211 if (ptr[1] < 11 + 5) {
212 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
213 "subelem");
214 break;
215 }
216 gtk_len = *(ptr + 4);
217 if (ptr[1] < 11 + gtk_len ||
218 gtk_len < 5 || gtk_len > 32) {
219 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
220 "subelem");
221 break;
222 }
223 wpa_wnmsleep_install_key(
224 wpa_s->wpa,
225 WNM_SLEEP_SUBELEM_GTK,
226 ptr);
227 ptr += 13 + gtk_len;
228#ifdef CONFIG_IEEE80211W
229 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
230 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
231 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
232 "subelem");
233 break;
234 }
235 wpa_wnmsleep_install_key(wpa_s->wpa,
236 WNM_SLEEP_SUBELEM_IGTK, ptr);
237 ptr += 10 + WPA_IGTK_LEN;
238#endif /* CONFIG_IEEE80211W */
239 } else
240 break; /* skip the loop */
241 }
242}
243
244
75cad1a0
XC		 245static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
246 const u8 *frm, int len)
247{
248 /*
9a147ba1 249 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
75cad1a0
XC		 250 * WNM-Sleep Mode IE | TFS Response IE
251 */
dacd789f 252 const u8 *pos = frm; /* point to payload after the action field */
9a147ba1 253 u16 key_len_total;
75cad1a0
XC		 254 struct wnm_sleep_element *wnmsleep_ie = NULL;
255 /* multiple TFS Resp IE (assuming consecutive) */
dacd789f
JM		 256 const u8 *tfsresp_ie_start = NULL;
257 const u8 *tfsresp_ie_end = NULL;
fecc09ed 258 size_t left;
75cad1a0 259
03ed0a52
JM		 260 if (!wpa_s->wnmsleep_used) {
261 wpa_printf(MSG_DEBUG,
262 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode has not been used in this association");
263 return;
264 }
265
9a147ba1
JM		 266 if (len < 3)
267 return;
268 key_len_total = WPA_GET_LE16(frm + 1);
269
dbfb8e82
JM		 270 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
271 frm[0], key_len_total);
fecc09ed
JM		 272 left = len - 3;
273 if (key_len_total > left) {
68db9ab0
JM		 274 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
275 return;
276 }
fecc09ed 277 pos += 3 + key_len_total;
bdce45b8 278 while (pos - frm + 1 < len) {
75cad1a0 279 u8 ie_len = *(pos + 1);
bdce45b8 280 if (2 + ie_len > frm + len - pos) {
68db9ab0
JM		 281 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
282 break;
283 }
284 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
8acbe7f2 285 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
75cad1a0
XC		 286 wnmsleep_ie = (struct wnm_sleep_element *) pos;
287 else if (*pos == WLAN_EID_TFS_RESP) {
288 if (!tfsresp_ie_start)
289 tfsresp_ie_start = pos;
290 tfsresp_ie_end = pos;
291 } else
292 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
293 pos += ie_len + 2;
294 }
295
296 if (!wnmsleep_ie) {
297 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
298 return;
299 }
300
62f6fbb4
JM		 301 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
302 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
75cad1a0
XC		 303 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
304 "frame (action=%d, intval=%d)",
305 wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc 306 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
74b4a360
JM		 307 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
308 tfsresp_ie_end);
df80a0cc 309 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
74b4a360 310 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
75cad1a0
XC		 311 }
312 } else {
313 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
314 "(action=%d, intval=%d)",
315 wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc 316 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
75cad1a0
XC		 317 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
318 wpa_s->bssid, NULL, NULL);
df80a0cc 319 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
75cad1a0
XC		 320 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
321 wpa_s->bssid, NULL, NULL);
322 }
323}
324
325
e27d20bb
VK		 326void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
327{
328 int i;
329
330 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
e27d20bb 331 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
e27d20bb
VK		 332 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
333 }
334
ec331d09 335 wpa_s->wnm_num_neighbor_report = 0;
e27d20bb
VK		 336 os_free(wpa_s->wnm_neighbor_report_elements);
337 wpa_s->wnm_neighbor_report_elements = NULL;
338}
339
340
341static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
342 u8 id, u8 elen, const u8 *pos)
343{
344 switch (id) {
345 case WNM_NEIGHBOR_TSF:
346 if (elen < 2 + 2) {
347 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
348 break;
349 }
09322678
JM		 350 rep->tsf_offset = WPA_GET_LE16(pos);
351 rep->beacon_int = WPA_GET_LE16(pos + 2);
352 rep->tsf_present = 1;
e27d20bb
VK		 353 break;
354 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
355 if (elen < 2) {
356 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
357 "country string");
358 break;
359 }
09322678
JM		 360 os_memcpy(rep->country, pos, 2);
361 rep->country_present = 1;
e27d20bb
VK		 362 break;
363 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
364 if (elen < 1) {
365 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
366 "candidate");
367 break;
368 }
09322678
JM		 369 rep->preference = pos[0];
370 rep->preference_present = 1;
e27d20bb
VK		 371 break;
372 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
09322678
JM		 373 rep->bss_term_tsf = WPA_GET_LE64(pos);
374 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
375 rep->bss_term_present = 1;
e27d20bb
VK		 376 break;
377 case WNM_NEIGHBOR_BEARING:
378 if (elen < 8) {
379 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
380 "bearing");
381 break;
382 }
09322678
JM		 383 rep->bearing = WPA_GET_LE16(pos);
384 rep->distance = WPA_GET_LE32(pos + 2);
385 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
386 rep->bearing_present = 1;
e27d20bb
VK		 387 break;
388 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
f6ce70dc 389 if (elen < 1) {
e27d20bb
VK		 390 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
391 "pilot");
392 break;
393 }
e9cb7b92 394 os_free(rep->meas_pilot);
e27d20bb
VK		 395 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
396 if (rep->meas_pilot == NULL)
397 break;
e27d20bb 398 rep->meas_pilot->measurement_pilot = pos[0];
f6ce70dc
JM		 399 rep->meas_pilot->subelem_len = elen - 1;
400 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
e27d20bb
VK		 401 break;
402 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
f6ce70dc 403 if (elen < 5) {
e27d20bb
VK		 404 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
405 "capabilities");
406 break;
407 }
09322678
JM		 408 os_memcpy(rep->rm_capab, pos, 5);
409 rep->rm_capab_present = 1;
e27d20bb
VK		 410 break;
411 case WNM_NEIGHBOR_MULTIPLE_BSSID:
f6ce70dc 412 if (elen < 1) {
e27d20bb
VK		 413 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
414 break;
415 }
e9cb7b92 416 os_free(rep->mul_bssid);
e27d20bb
VK		 417 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
418 if (rep->mul_bssid == NULL)
419 break;
e27d20bb 420 rep->mul_bssid->max_bssid_indicator = pos[0];
f6ce70dc
JM		 421 rep->mul_bssid->subelem_len = elen - 1;
422 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
e27d20bb
VK		 423 break;
424 }
425}
426
427
e1117c1c
JM		 428static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
429{
158211b2
JM		 430 struct wpa_bss *bss = wpa_s->current_bss;
431 const char *country = NULL;
80ce804e 432 int freq;
158211b2
JM		 433
434 if (bss) {
435 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
436
437 if (elem && elem[1] >= 2)
438 country = (const char *) (elem + 2);
439 }
440
80ce804e
JM		 441 freq = ieee80211_chan_to_freq(country, op_class, chan);
442 if (freq <= 0 && op_class == 0) {
443 /*
444 * Some APs do not advertise correct operating class
445 * information. Try to determine the most likely operating
446 * frequency based on the channel number.
447 */
448 if (chan >= 1 && chan <= 13)
449 freq = 2407 + chan * 5;
450 else if (chan == 14)
451 freq = 2484;
452 else if (chan >= 36 && chan <= 169)
453 freq = 5000 + chan * 5;
454 }
455 return freq;
e1117c1c
JM		 456}
457
458
e27d20bb
VK		 459static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
460 const u8 *pos, u8 len,
461 struct neighbor_report *rep)
462{
463 u8 left = len;
464
465 if (left < 13) {
466 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
467 return;
468 }
469
470 os_memcpy(rep->bssid, pos, ETH_ALEN);
4c381f0d 471 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
e27d20bb
VK		 472 rep->regulatory_class = *(pos + 10);
473 rep->channel_number = *(pos + 11);
474 rep->phy_type = *(pos + 12);
475
476 pos += 13;
477 left -= 13;
478
479 while (left >= 2) {
480 u8 id, elen;
481
482 id = *pos++;
483 elen = *pos++;
1aa6f953
JM		 484 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
485 left -= 2;
486 if (elen > left) {
487 wpa_printf(MSG_DEBUG,
488 "WNM: Truncated neighbor report subelement");
489 break;
490 }
e27d20bb 491 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
1aa6f953 492 left -= elen;
e27d20bb
VK		 493 pos += elen;
494 }
e1117c1c
JM		 495
496 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
497 rep->channel_number);
e27d20bb
VK		 498}
499
500
d0b9ab69
JM		 501static struct wpa_bss *
502compare_scan_neighbor_results(struct wpa_supplicant *wpa_s)
e27d20bb
VK		 503{
504
d0b9ab69 505 u8 i;
027454d2 506 struct wpa_bss *bss = wpa_s->current_bss;
d0b9ab69 507 struct wpa_bss *target;
e27d20bb 508
d0b9ab69 509 if (!bss)
e27d20bb
VK		 510 return 0;
511
3c1060ff 512 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
027454d2 513 MAC2STR(wpa_s->bssid), bss->level);
3c1060ff 514
d0b9ab69
JM		 515 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
516 struct neighbor_report *nei;
027454d2 517
d0b9ab69 518 nei = &wpa_s->wnm_neighbor_report_elements[i];
027454d2
JM		 519 if (nei->preference_present && nei->preference == 0) {
520 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
521 MAC2STR(nei->bssid));
522 continue;
523 }
524
d0b9ab69
JM		 525 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
526 if (!target) {
027454d2
JM		 527 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
528 " (pref %d) not found in scan results",
529 MAC2STR(nei->bssid),
530 nei->preference_present ? nei->preference :
531 -1);
532 continue;
533 }
534
d0b9ab69
JM		 535 if (bss->ssid_len != target->ssid_len ||
536 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
027454d2
JM		 537 /*
538 * TODO: Could consider allowing transition to another
539 * ESS if PMF was enabled for the association.
540 */
541 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
542 " (pref %d) in different ESS",
543 MAC2STR(nei->bssid),
544 nei->preference_present ? nei->preference :
545 -1);
546 continue;
547 }
548
cbc3d6fe
JM		 549 if (wpa_s->current_ssid &&
550 !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
551 1)) {
552 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
553 " (pref %d) does not match the current network profile",
554 MAC2STR(nei->bssid),
555 nei->preference_present ? nei->preference :
556 -1);
557 continue;
558 }
559
dd599908
AS		 560 if (wpa_is_bss_tmp_disallowed(wpa_s, target->bssid)) {
561 wpa_printf(MSG_DEBUG,
562 "MBO: Candidate BSS " MACSTR
563 " retry delay is not over yet",
564 MAC2STR(nei->bssid));
565 continue;
566 }
567
d0b9ab69 568 if (target->level < bss->level && target->level < -80) {
027454d2
JM		 569 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
570 " (pref %d) does not have sufficient signal level (%d)",
571 MAC2STR(nei->bssid),
572 nei->preference_present ? nei->preference :
573 -1,
d0b9ab69 574 target->level);
027454d2
JM		 575 continue;
576 }
577
578 wpa_printf(MSG_DEBUG,
d0b9ab69 579 "WNM: Found an acceptable preferred transition candidate BSS "
027454d2 580 MACSTR " (RSSI %d)",
d0b9ab69
JM		 581 MAC2STR(nei->bssid), target->level);
582 return target;
e27d20bb
VK		 583 }
584
d0b9ab69 585 return NULL;
e27d20bb
VK		 586}
587
588
84d1c0fd
AS		 589static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
590{
591 const u8 *ie_a, *ie_b;
592
593 if (!a || !b)
594 return 0;
595
596 ie_a = wpa_bss_get_ie(a, eid);
597 ie_b = wpa_bss_get_ie(b, eid);
598
599 if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
600 return 0;
601
602 return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
603}
604
605
606static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
607{
608 u32 info = 0;
609
610 info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
611
612 /*
613 * Leave the security and key scope bits unset to indicate that the
614 * security information is not available.
615 */
616
617 if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
618 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
619 if (bss->caps & WLAN_CAPABILITY_QOS)
620 info |= NEI_REP_BSSID_INFO_QOS;
621 if (bss->caps & WLAN_CAPABILITY_APSD)
622 info |= NEI_REP_BSSID_INFO_APSD;
623 if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
624 info |= NEI_REP_BSSID_INFO_RM;
625 if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
626 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
627 if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
628 info |= NEI_REP_BSSID_INFO_IMM_BA;
629 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
630 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
631 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
632 info |= NEI_REP_BSSID_INFO_HT;
633
634 return info;
635}
636
637
638static int wnm_add_nei_rep(u8 *buf, size_t len, const u8 *bssid, u32 bss_info,
639 u8 op_class, u8 chan, u8 phy_type, u8 pref)
640{
641 u8 *pos = buf;
642
643 if (len < 18) {
644 wpa_printf(MSG_DEBUG,
645 "WNM: Not enough room for Neighbor Report element");
646 return -1;
647 }
648
649 *pos++ = WLAN_EID_NEIGHBOR_REPORT;
650 /* length: 13 for basic neighbor report + 3 for preference subelement */
651 *pos++ = 16;
652 os_memcpy(pos, bssid, ETH_ALEN);
653 pos += ETH_ALEN;
654 WPA_PUT_LE32(pos, bss_info);
655 pos += 4;
656 *pos++ = op_class;
657 *pos++ = chan;
658 *pos++ = phy_type;
659 *pos++ = WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE;
660 *pos++ = 1;
661 *pos++ = pref;
662 return pos - buf;
663}
664
665
666static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
667 struct wpa_bss *bss, u8 *buf, size_t len,
668 u8 pref)
669{
670 const u8 *ie;
671 u8 op_class, chan;
672 int sec_chan = 0, vht = 0;
673 enum phy_type phy_type;
674 u32 info;
675 struct ieee80211_ht_operation *ht_oper = NULL;
676 struct ieee80211_vht_operation *vht_oper = NULL;
677
678 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
679 if (ie && ie[1] >= 2) {
680 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
681
682 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
683 sec_chan = 1;
684 else if (ht_oper->ht_param &
685 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
686 sec_chan = -1;
687 }
688
689 ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
690 if (ie && ie[1] >= 1) {
691 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
692
693 if (vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80MHZ ||
694 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_160MHZ ||
695 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80P80MHZ)
696 vht = vht_oper->vht_op_info_chwidth;
697 }
698
699 if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
700 &chan) == NUM_HOSTAPD_MODES) {
701 wpa_printf(MSG_DEBUG,
702 "WNM: Cannot determine operating class and channel");
703 return -2;
704 }
705
706 phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
707 (vht_oper != NULL));
708 if (phy_type == PHY_TYPE_UNSPECIFIED) {
709 wpa_printf(MSG_DEBUG,
710 "WNM: Cannot determine BSS phy type for Neighbor Report");
711 return -2;
712 }
713
714 info = wnm_get_bss_info(wpa_s, bss);
715
716 return wnm_add_nei_rep(buf, len, bss->bssid, info, op_class, chan,
717 phy_type, pref);
718}
719
720
721static int wnm_add_cand_list(struct wpa_supplicant *wpa_s, u8 *buf, size_t len)
722{
723 u8 *pos = buf;
724 unsigned int i, pref = 255;
725 struct os_reltime now;
726 struct wpa_ssid *ssid = wpa_s->current_ssid;
727
728 if (!ssid)
729 return 0;
730
731 /*
732 * TODO: Define when scan results are no longer valid for the candidate
733 * list.
734 */
735 os_get_reltime(&now);
736 if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
737 return 0;
738
739 wpa_printf(MSG_DEBUG,
740 "WNM: Add candidate list to BSS Transition Management Response frame");
741 for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
742 struct wpa_bss *bss = wpa_s->last_scan_res[i];
743 int res;
744
745 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1)) {
746 res = wnm_nei_rep_add_bss(wpa_s, bss, pos, len, pref--);
747 if (res == -2)
748 continue; /* could not build entry for BSS */
749 if (res < 0)
750 break; /* no more room for candidates */
751 if (pref == 1)
752 break;
753
754 pos += res;
755 len -= res;
756 }
757 }
758
759 wpa_hexdump(MSG_DEBUG,
760 "WNM: BSS Transition Management Response candidate list",
761 buf, pos - buf);
762
763 return pos - buf;
764}
765
766
7b53acd3
JM		 767static void wnm_send_bss_transition_mgmt_resp(
768 struct wpa_supplicant *wpa_s, u8 dialog_token,
769 enum bss_trans_mgmt_status_code status, u8 delay,
770 const u8 *target_bssid)
2049a875 771{
84d1c0fd 772 u8 buf[2000], *pos;
2049a875
JM		 773 struct ieee80211_mgmt *mgmt;
774 size_t len;
f5f3728a 775 int res;
2049a875
JM		 776
777 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
778 "to " MACSTR " dialog_token=%u status=%u delay=%d",
779 MAC2STR(wpa_s->bssid), dialog_token, status, delay);
d0b9ab69
JM		 780 if (!wpa_s->current_bss) {
781 wpa_printf(MSG_DEBUG,
782 "WNM: Current BSS not known - drop response");
783 return;
784 }
2049a875
JM		 785
786 mgmt = (struct ieee80211_mgmt *) buf;
787 os_memset(&buf, 0, sizeof(buf));
788 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
789 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
790 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
791 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
792 WLAN_FC_STYPE_ACTION);
793 mgmt->u.action.category = WLAN_ACTION_WNM;
794 mgmt->u.action.u.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
795 mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
796 mgmt->u.action.u.bss_tm_resp.status_code = status;
797 mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
798 pos = mgmt->u.action.u.bss_tm_resp.variable;
799 if (target_bssid) {
800 os_memcpy(pos, target_bssid, ETH_ALEN);
801 pos += ETH_ALEN;
2cd0f6a4
JM		 802 } else if (status == WNM_BSS_TM_ACCEPT) {
803 /*
804 * P802.11-REVmc clarifies that the Target BSSID field is always
805 * present when status code is zero, so use a fake value here if
806 * no BSSID is yet known.
807 */
808 os_memset(pos, 0, ETH_ALEN);
809 pos += ETH_ALEN;
2049a875
JM		 810 }
811
84d1c0fd
AS		 812 if (status == WNM_BSS_TM_ACCEPT)
813 pos += wnm_add_cand_list(wpa_s, pos, buf + sizeof(buf) - pos);
814
c8082d2b
AS		 815#ifdef CONFIG_MBO
816 if (status != WNM_BSS_TM_ACCEPT) {
817 pos += wpas_mbo_ie_bss_trans_reject(
818 wpa_s, pos, buf + sizeof(buf) - pos,
819 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED);
820 }
821#endif /* CONFIG_MBO */
822
2049a875
JM		 823 len = pos - (u8 *) &mgmt->u.action.category;
824
f5f3728a
JM		 825 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
826 wpa_s->own_addr, wpa_s->bssid,
827 &mgmt->u.action.category, len, 0);
828 if (res < 0) {
829 wpa_printf(MSG_DEBUG,
830 "WNM: Failed to send BSS Transition Management Response");
831 }
2049a875
JM		 832}
833
834
75d65857 835int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
e27d20bb 836{
d0b9ab69
JM		 837 struct wpa_bss *bss;
838 struct wpa_ssid *ssid = wpa_s->current_ssid;
839 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
e27d20bb 840
d0b9ab69
JM		 841 if (!wpa_s->wnm_neighbor_report_elements)
842 return 0;
843
844 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
845 &wpa_s->scan_trigger_time)) {
846 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
847 wnm_deallocate_memory(wpa_s);
848 return 0;
849 }
850
851 if (!wpa_s->current_bss ||
852 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
853 ETH_ALEN) != 0) {
854 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
855 return 0;
e27d20bb
VK		 856 }
857
858 /* Compare the Neighbor Report and scan results */
d0b9ab69
JM		 859 bss = compare_scan_neighbor_results(wpa_s);
860 if (!bss) {
861 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
862 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
863 goto send_bss_resp_fail;
864 }
e27d20bb 865
d0b9ab69
JM		 866 /* Associate to the network */
867 /* Send the BSS Management Response - Accept */
868 if (wpa_s->wnm_reply) {
869 wpa_s->wnm_reply = 0;
870 wnm_send_bss_transition_mgmt_resp(wpa_s,
e27d20bb 871 wpa_s->wnm_dialog_token,
7b53acd3 872 WNM_BSS_TM_ACCEPT,
d0b9ab69
JM		 873 0, bss->bssid);
874 }
e27d20bb 875
d0b9ab69
JM		 876 if (bss == wpa_s->current_bss) {
877 wpa_printf(MSG_DEBUG,
878 "WNM: Already associated with the preferred candidate");
1e74ae4d 879 wnm_deallocate_memory(wpa_s);
d0b9ab69 880 return 1;
e27d20bb
VK		 881 }
882
d0b9ab69
JM		 883 wpa_s->reassociate = 1;
884 wpa_supplicant_connect(wpa_s, bss, ssid);
885 wnm_deallocate_memory(wpa_s);
886 return 1;
887
e27d20bb 888send_bss_resp_fail:
75d65857
JM		 889 if (!reply_on_fail)
890 return 0;
891
892 /* Send reject response for all the failures */
893
e27d20bb 894 if (wpa_s->wnm_reply) {
d0b9ab69 895 wpa_s->wnm_reply = 0;
e27d20bb
VK		 896 wnm_send_bss_transition_mgmt_resp(wpa_s,
897 wpa_s->wnm_dialog_token,
d0b9ab69 898 status, 0, NULL);
e27d20bb 899 }
d0b9ab69
JM		 900 wnm_deallocate_memory(wpa_s);
901
902 return 0;
e27d20bb
VK		 903}
904
905
ff2c5758
JM		 906static int cand_pref_compar(const void *a, const void *b)
907{
908 const struct neighbor_report *aa = a;
909 const struct neighbor_report *bb = b;
910
911 if (!aa->preference_present && !bb->preference_present)
912 return 0;
913 if (!aa->preference_present)
914 return 1;
915 if (!bb->preference_present)
916 return -1;
917 if (bb->preference > aa->preference)
918 return 1;
919 if (bb->preference < aa->preference)
920 return -1;
921 return 0;
922}
923
924
925static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
926{
927 if (!wpa_s->wnm_neighbor_report_elements)
928 return;
929 qsort(wpa_s->wnm_neighbor_report_elements,
930 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
931 cand_pref_compar);
932}
933
934
8040dc53
JM		 935static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
936{
937 unsigned int i;
938
939 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
940 if (!wpa_s->wnm_neighbor_report_elements)
941 return;
942 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
943 struct neighbor_report *nei;
944
945 nei = &wpa_s->wnm_neighbor_report_elements[i];
946 wpa_printf(MSG_DEBUG, "%u: " MACSTR
e1117c1c 947 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
4c381f0d
JM		 948 i, MAC2STR(nei->bssid), nei->bssid_info,
949 nei->regulatory_class,
8040dc53 950 nei->channel_number, nei->phy_type,
e1117c1c
JM		 951 nei->preference_present ? nei->preference : -1,
952 nei->freq);
953 }
954}
955
956
957static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
958{
959 unsigned int i;
960
961 for (i = 0; i < wpa_s->hw.num_modes; i++) {
962 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
963 int j;
964
965 for (j = 0; j < mode->num_channels; j++) {
966 struct hostapd_channel_data *chan;
967
968 chan = &mode->channels[j];
969 if (chan->freq == freq &&
970 !(chan->flag & HOSTAPD_CHAN_DISABLED))
971 return 1;
972 }
973 }
974
975 return 0;
976}
977
978
979static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
980{
981 int *freqs;
982 int num_freqs = 0;
983 unsigned int i;
984
985 if (!wpa_s->wnm_neighbor_report_elements)
986 return;
987
988 if (wpa_s->hw.modes == NULL)
989 return;
990
991 os_free(wpa_s->next_scan_freqs);
992 wpa_s->next_scan_freqs = NULL;
993
994 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
995 if (freqs == NULL)
996 return;
997
998 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
999 struct neighbor_report *nei;
1000
1001 nei = &wpa_s->wnm_neighbor_report_elements[i];
1002 if (nei->freq <= 0) {
1003 wpa_printf(MSG_DEBUG,
1004 "WNM: Unknown neighbor operating frequency for "
1005 MACSTR " - scan all channels",
1006 MAC2STR(nei->bssid));
1007 os_free(freqs);
1008 return;
1009 }
1010 if (chan_supported(wpa_s, nei->freq))
1011 add_freq(freqs, &num_freqs, nei->freq);
8040dc53 1012 }
e1117c1c
JM		 1013
1014 if (num_freqs == 0) {
1015 os_free(freqs);
1016 return;
1017 }
1018
1019 wpa_printf(MSG_DEBUG,
1020 "WNM: Scan %d frequencies based on transition candidate list",
1021 num_freqs);
1022 wpa_s->next_scan_freqs = freqs;
8040dc53
JM		 1023}
1024
1025
2049a875
JM		 1026static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1027 const u8 *pos, const u8 *end,
1028 int reply)
1029{
8c9af762
JM		 1030 unsigned int beacon_int;
1031 u8 valid_int;
dd599908
AS		 1032#ifdef CONFIG_MBO
1033 const u8 *vendor;
1034#endif /* CONFIG_MBO */
8c9af762 1035
bdce45b8 1036 if (end - pos < 5)
2049a875
JM		 1037 return;
1038
8c9af762
JM		 1039 if (wpa_s->current_bss)
1040 beacon_int = wpa_s->current_bss->beacon_int;
1041 else
1042 beacon_int = 100; /* best guess */
1043
e27d20bb
VK		 1044 wpa_s->wnm_dialog_token = pos[0];
1045 wpa_s->wnm_mode = pos[1];
1046 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
8c9af762 1047 valid_int = pos[4];
e27d20bb 1048 wpa_s->wnm_reply = reply;
2049a875
JM		 1049
1050 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1051 "dialog_token=%u request_mode=0x%x "
1052 "disassoc_timer=%u validity_interval=%u",
e27d20bb 1053 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
8c9af762 1054 wpa_s->wnm_dissoc_timer, valid_int);
e27d20bb 1055
2049a875 1056 pos += 5;
e27d20bb 1057
7b53acd3 1058 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
bdce45b8 1059 if (end - pos < 12) {
e27d20bb
VK		 1060 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1061 return;
1062 }
1063 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
2049a875 1064 pos += 12; /* BSS Termination Duration */
e27d20bb
VK		 1065 }
1066
7b53acd3 1067 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
2049a875 1068 char url[256];
ae8535b6 1069
bdce45b8 1070 if (end - pos < 1 || 1 + pos[0] > end - pos) {
2049a875
JM		 1071 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1072 "Management Request (URL)");
1073 return;
1074 }
1075 os_memcpy(url, pos + 1, pos[0]);
1076 url[pos[0]] = '\0';
e27d20bb 1077 pos += 1 + pos[0];
ae8535b6 1078
ae8535b6
JM		 1079 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1080 wpa_sm_pmf_enabled(wpa_s->wpa),
1081 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
2049a875
JM		 1082 }
1083
7b53acd3 1084 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
2049a875 1085 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
e27d20bb
VK		 1086 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1087 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
2049a875
JM		 1088 /* TODO: mark current BSS less preferred for
1089 * selection */
1090 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1091 wpa_supplicant_req_scan(wpa_s, 0, 0);
1092 }
1093 }
1094
dd599908
AS		 1095#ifdef CONFIG_MBO
1096 vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
1097 if (vendor)
1098 wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
1099#endif /* CONFIG_MBO */
1100
7b53acd3 1101 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
8c9af762
JM		 1102 unsigned int valid_ms;
1103
e27d20bb 1104 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
279b5486 1105 wnm_deallocate_memory(wpa_s);
faebdeaa
JM		 1106 wpa_s->wnm_neighbor_report_elements = os_calloc(
1107 WNM_MAX_NEIGHBOR_REPORT,
e27d20bb
VK		 1108 sizeof(struct neighbor_report));
1109 if (wpa_s->wnm_neighbor_report_elements == NULL)
1110 return;
1111
bdce45b8 1112 while (end - pos >= 2 &&
e27d20bb
VK		 1113 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1114 {
1115 u8 tag = *pos++;
1116 u8 len = *pos++;
1117
1118 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1119 tag);
bdce45b8 1120 if (len > end - pos) {
e27d20bb
VK		 1121 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1122 return;
1123 }
1aa6f953
JM		 1124 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1125 struct neighbor_report *rep;
1126 rep = &wpa_s->wnm_neighbor_report_elements[
1127 wpa_s->wnm_num_neighbor_report];
1128 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
f420577f 1129 wpa_s->wnm_num_neighbor_report++;
1aa6f953 1130 }
e27d20bb
VK		 1131
1132 pos += len;
e27d20bb 1133 }
d14e63a2
AS		 1134
1135 if (!wpa_s->wnm_num_neighbor_report) {
1136 wpa_printf(MSG_DEBUG,
1137 "WNM: Candidate list included bit is set, but no candidates found");
1138 wnm_send_bss_transition_mgmt_resp(
1139 wpa_s, wpa_s->wnm_dialog_token,
1140 WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
1141 0, NULL);
1142 return;
1143 }
1144
ff2c5758 1145 wnm_sort_cand_list(wpa_s);
8040dc53 1146 wnm_dump_cand_list(wpa_s);
8c9af762
JM		 1147 valid_ms = valid_int * beacon_int * 128 / 125;
1148 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1149 valid_ms);
1150 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1151 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1152 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1153 wpa_s->wnm_cand_valid_until.sec +=
1154 wpa_s->wnm_cand_valid_until.usec / 1000000;
1155 wpa_s->wnm_cand_valid_until.usec %= 1000000;
d0b9ab69 1156 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
e27d20bb 1157
75d65857
JM		 1158 if (wpa_s->last_scan_res_used > 0) {
1159 struct os_reltime now;
1160
1161 os_get_reltime(&now);
1162 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1163 wpa_printf(MSG_DEBUG,
1164 "WNM: Try to use recent scan results");
1165 if (wnm_scan_process(wpa_s, 0) > 0)
1166 return;
1167 wpa_printf(MSG_DEBUG,
1168 "WNM: No match in previous scan results - try a new scan");
1169 }
1170 }
1171
e1117c1c 1172 wnm_set_scan_freqs(wpa_s);
0645492e
JM		 1173 if (wpa_s->wnm_num_neighbor_report == 1) {
1174 os_memcpy(wpa_s->next_scan_bssid,
1175 wpa_s->wnm_neighbor_report_elements[0].bssid,
1176 ETH_ALEN);
1177 wpa_printf(MSG_DEBUG,
1178 "WNM: Scan only for a specific BSSID since there is only a single candidate "
1179 MACSTR, MAC2STR(wpa_s->next_scan_bssid));
1180 }
e27d20bb
VK		 1181 wpa_supplicant_req_scan(wpa_s, 0, 0);
1182 } else if (reply) {
6df634fa
JM		 1183 enum bss_trans_mgmt_status_code status;
1184 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1185 status = WNM_BSS_TM_ACCEPT;
1186 else {
1187 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1188 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1189 }
e27d20bb
VK		 1190 wnm_send_bss_transition_mgmt_resp(wpa_s,
1191 wpa_s->wnm_dialog_token,
6df634fa 1192 status, 0, NULL);
2049a875
JM		 1193 }
1194}
1195
1196
65bcd0a9 1197int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
9a493fab 1198 u8 query_reason, int cand_list)
65bcd0a9 1199{
9a493fab 1200 u8 buf[2000], *pos;
65bcd0a9
VK		 1201 struct ieee80211_mgmt *mgmt;
1202 size_t len;
1203 int ret;
1204
1205 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
9a493fab
AS		 1206 MACSTR " query_reason=%u%s",
1207 MAC2STR(wpa_s->bssid), query_reason,
1208 cand_list ? " candidate list" : "");
65bcd0a9
VK		 1209
1210 mgmt = (struct ieee80211_mgmt *) buf;
1211 os_memset(&buf, 0, sizeof(buf));
1212 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
1213 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
1214 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
1215 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1216 WLAN_FC_STYPE_ACTION);
1217 mgmt->u.action.category = WLAN_ACTION_WNM;
1218 mgmt->u.action.u.bss_tm_query.action = WNM_BSS_TRANS_MGMT_QUERY;
a8a6a35f 1219 mgmt->u.action.u.bss_tm_query.dialog_token = 1;
65bcd0a9
VK		 1220 mgmt->u.action.u.bss_tm_query.query_reason = query_reason;
1221 pos = mgmt->u.action.u.bss_tm_query.variable;
1222
9a493fab
AS		 1223 if (cand_list)
1224 pos += wnm_add_cand_list(wpa_s, pos, buf + sizeof(buf) - pos);
1225
65bcd0a9
VK		 1226 len = pos - (u8 *) &mgmt->u.action.category;
1227
1228 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1229 wpa_s->own_addr, wpa_s->bssid,
1230 &mgmt->u.action.category, len, 0);
1231
1232 return ret;
1233}
1234
1235
95a3ea94
JM		 1236static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1237 const u8 *sa, const u8 *data,
1238 int len)
1239{
7ef69479 1240 const u8 *pos, *end, *next;
95a3ea94
JM		 1241 u8 ie, ie_len;
1242
1243 pos = data;
1244 end = data + len;
1245
bdce45b8 1246 while (end - pos > 1) {
95a3ea94
JM		 1247 ie = *pos++;
1248 ie_len = *pos++;
1249 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1250 ie, ie_len);
1251 if (ie_len > end - pos) {
1252 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1253 "subelement");
1254 break;
1255 }
7ef69479
JM		 1256 next = pos + ie_len;
1257 if (ie_len < 4) {
1258 pos = next;
1259 continue;
1260 }
1261 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1262 WPA_GET_BE24(pos), pos[3]);
95a3ea94
JM		 1263
1264#ifdef CONFIG_HS20
1265 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1266 WPA_GET_BE24(pos) == OUI_WFA &&
1267 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1268 /* Subscription Remediation subelement */
1269 const u8 *ie_end;
1270 u8 url_len;
1271 char *url;
1272 u8 osu_method;
1273
1274 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1275 "subelement");
1276 ie_end = pos + ie_len;
1277 pos += 4;
1278 url_len = *pos++;
1279 if (url_len == 0) {
1280 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1281 url = NULL;
1282 osu_method = 1;
1283 } else {
bdce45b8 1284 if (url_len + 1 > ie_end - pos) {
95a3ea94
JM		 1285 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1286 url_len,
1287 (int) (ie_end - pos));
1288 break;
1289 }
1290 url = os_malloc(url_len + 1);
1291 if (url == NULL)
1292 break;
1293 os_memcpy(url, pos, url_len);
1294 url[url_len] = '\0';
1295 osu_method = pos[url_len];
1296 }
1297 hs20_rx_subscription_remediation(wpa_s, url,
1298 osu_method);
1299 os_free(url);
7ef69479
JM		 1300 pos = next;
1301 continue;
1302 }
1303
1304 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1305 WPA_GET_BE24(pos) == OUI_WFA &&
1306 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1307 const u8 *ie_end;
1308 u8 url_len;
1309 char *url;
1310 u8 code;
1311 u16 reauth_delay;
1312
1313 ie_end = pos + ie_len;
1314 pos += 4;
1315 code = *pos++;
1316 reauth_delay = WPA_GET_LE16(pos);
1317 pos += 2;
1318 url_len = *pos++;
1319 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1320 "Imminent - Reason Code %u "
1321 "Re-Auth Delay %u URL Length %u",
1322 code, reauth_delay, url_len);
bdce45b8 1323 if (url_len > ie_end - pos)
7ef69479
JM		 1324 break;
1325 url = os_malloc(url_len + 1);
1326 if (url == NULL)
1327 break;
1328 os_memcpy(url, pos, url_len);
1329 url[url_len] = '\0';
1330 hs20_rx_deauth_imminent_notice(wpa_s, code,
1331 reauth_delay, url);
1332 os_free(url);
1333 pos = next;
1334 continue;
95a3ea94
JM		 1335 }
1336#endif /* CONFIG_HS20 */
1337
7ef69479 1338 pos = next;
95a3ea94
JM		 1339 }
1340}
1341
1342
1343static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1344 const u8 *sa, const u8 *frm, int len)
1345{
1346 const u8 *pos, *end;
1347 u8 dialog_token, type;
1348
1349 /* Dialog Token [1] | Type [1] | Subelements */
1350
1351 if (len < 2 || sa == NULL)
1352 return;
1353 end = frm + len;
1354 pos = frm;
1355 dialog_token = *pos++;
1356 type = *pos++;
1357
1358 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1359 "(dialog_token %u type %u sa " MACSTR ")",
1360 dialog_token, type, MAC2STR(sa));
1361 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1362 pos, end - pos);
1363
1364 if (wpa_s->wpa_state != WPA_COMPLETED ||
1365 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1366 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1367 "from our AP - ignore it");
1368 return;
1369 }
1370
1371 switch (type) {
1372 case 1:
1373 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1374 break;
1375 default:
1376 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1377 "WNM-Notification type %u", type);
1378 break;
1379 }
1380}
1381
1382
75cad1a0 1383void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
dbfb8e82 1384 const struct ieee80211_mgmt *mgmt, size_t len)
75cad1a0 1385{
27c77751 1386 const u8 *pos, *end;
2049a875 1387 u8 act;
27c77751 1388
dbfb8e82 1389 if (len < IEEE80211_HDRLEN + 2)
27c77751
JM		 1390 return;
1391
2703fb4a 1392 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
27c77751 1393 act = *pos++;
dbfb8e82 1394 end = ((const u8 *) mgmt) + len;
27c77751
JM		 1395
1396 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
dbfb8e82 1397 act, MAC2STR(mgmt->sa));
2049a875 1398 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
dbfb8e82 1399 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
2049a875
JM		 1400 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1401 "frame");
1402 return;
1403 }
75cad1a0
XC		 1404
1405 switch (act) {
27c77751 1406 case WNM_BSS_TRANS_MGMT_REQ:
2049a875 1407 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
dbfb8e82 1408 !(mgmt->da[0] & 0x01));
27c77751 1409 break;
75cad1a0 1410 case WNM_SLEEP_MODE_RESP:
dbfb8e82 1411 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
75cad1a0 1412 break;
95a3ea94
JM		 1413 case WNM_NOTIFICATION_REQ:
1414 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1415 break;
75cad1a0 1416 default:
e27d20bb 1417 wpa_printf(MSG_ERROR, "WNM: Unknown request");
75cad1a0
XC		 1418 break;
1419 }
1420}
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