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WNM: Collocated Interference Reporting
[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"
af8bc24d 16#include "config.h"
61c54976
JM		 17#include "wpa_supplicant_i.h"
18#include "driver_i.h"
2049a875 19#include "scan.h"
e27d20bb
VK		 20#include "ctrl_iface.h"
21#include "bss.h"
22#include "wnm_sta.h"
95a3ea94 23#include "hs20_supplicant.h"
75cad1a0
XC		 24
25#define MAX_TFS_IE_LEN 1024
e27d20bb 26#define WNM_MAX_NEIGHBOR_REPORT 10
75cad1a0 27
2f195639 28#define WNM_SCAN_RESULT_AGE 2 /* 2 seconds */
75cad1a0
XC		 29
30/* get the TFS IE from driver */
31static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
32 u16 *buf_len, enum wnm_oper oper)
33{
34 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
35
36 return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
37}
38
39
40/* set the TFS IE to driver */
41static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
dacd789f 42 const u8 *addr, const u8 *buf, u16 buf_len,
75cad1a0
XC		 43 enum wnm_oper oper)
44{
dacd789f
JM		 45 u16 len = buf_len;
46
75cad1a0
XC		 47 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
48
dacd789f 49 return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
75cad1a0
XC		 50}
51
52
53/* MLME-SLEEPMODE.request */
54int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
cd0ef657 55 u8 action, u16 intval, struct wpabuf *tfs_req)
75cad1a0
XC		 56{
57 struct ieee80211_mgmt *mgmt;
58 int res;
59 size_t len;
60 struct wnm_sleep_element *wnmsleep_ie;
61 u8 *wnmtfs_ie;
62 u8 wnmsleep_ie_len;
63 u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
64 enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
65 WNM_SLEEP_TFS_REQ_IE_NONE;
66
cd0ef657
JM		 67 wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
68 "action=%s to " MACSTR,
69 action == 0 ? "enter" : "exit",
70 MAC2STR(wpa_s->bssid));
71
75cad1a0
XC		 72 /* WNM-Sleep Mode IE */
73 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
74 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
75 if (wnmsleep_ie == NULL)
76 return -1;
77 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
78 wnmsleep_ie->len = wnmsleep_ie_len - 2;
79 wnmsleep_ie->action_type = action;
80 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
e9199e31 81 wnmsleep_ie->intval = host_to_le16(intval);
cd0ef657
JM		 82 wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
83 (u8 *) wnmsleep_ie, wnmsleep_ie_len);
75cad1a0
XC		 84
85 /* TFS IE(s) */
cd0ef657
JM		 86 if (tfs_req) {
87 wnmtfs_ie_len = wpabuf_len(tfs_req);
a1f11e34 88 wnmtfs_ie = os_memdup(wpabuf_head(tfs_req), wnmtfs_ie_len);
cd0ef657
JM		 89 if (wnmtfs_ie == NULL) {
90 os_free(wnmsleep_ie);
91 return -1;
92 }
cd0ef657
JM		 93 } else {
94 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
95 if (wnmtfs_ie == NULL) {
96 os_free(wnmsleep_ie);
97 return -1;
98 }
99 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
100 tfs_oper)) {
101 wnmtfs_ie_len = 0;
102 os_free(wnmtfs_ie);
103 wnmtfs_ie = NULL;
104 }
75cad1a0 105 }
cd0ef657
JM		 106 wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
107 (u8 *) wnmtfs_ie, wnmtfs_ie_len);
75cad1a0
XC		 108
109 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
110 if (mgmt == NULL) {
111 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
112 "WNM-Sleep Request action frame");
14df897c
JM		 113 os_free(wnmsleep_ie);
114 os_free(wnmtfs_ie);
75cad1a0
XC		 115 return -1;
116 }
117
118 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
119 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
120 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
121 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
122 WLAN_FC_STYPE_ACTION);
123 mgmt->u.action.category = WLAN_ACTION_WNM;
124 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
e0c54a15 125 mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
75cad1a0
XC		 126 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
127 wnmsleep_ie_len);
128 /* copy TFS IE here */
129 if (wnmtfs_ie_len > 0) {
130 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
131 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
132 }
133
134 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
135 wnmtfs_ie_len;
136
137 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
138 wpa_s->own_addr, wpa_s->bssid,
139 &mgmt->u.action.category, len, 0);
140 if (res < 0)
141 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
142 "(action=%d, intval=%d)", action, intval);
03ed0a52
JM		 143 else
144 wpa_s->wnmsleep_used = 1;
75cad1a0
XC		 145
146 os_free(wnmsleep_ie);
147 os_free(wnmtfs_ie);
148 os_free(mgmt);
149
150 return res;
151}
152
153
74b4a360 154static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
dacd789f
JM		 155 const u8 *tfsresp_ie_start,
156 const u8 *tfsresp_ie_end)
74b4a360
JM		 157{
158 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
159 wpa_s->bssid, NULL, NULL);
160 /* remove GTK/IGTK ?? */
161
162 /* set the TFS Resp IE(s) */
163 if (tfsresp_ie_start && tfsresp_ie_end &&
164 tfsresp_ie_end - tfsresp_ie_start >= 0) {
165 u16 tfsresp_ie_len;
166 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
167 tfsresp_ie_start;
168 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
169 /* pass the TFS Resp IE(s) to driver for processing */
170 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
171 tfsresp_ie_start,
dacd789f 172 tfsresp_ie_len,
74b4a360
JM		 173 WNM_SLEEP_TFS_RESP_IE_SET))
174 wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
175 }
176}
177
178
179static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
180 const u8 *frm, u16 key_len_total)
181{
182 u8 *ptr, *end;
183 u8 gtk_len;
184
185 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
186 NULL, NULL);
187
188 /* Install GTK/IGTK */
189
190 /* point to key data field */
dbfb8e82 191 ptr = (u8 *) frm + 1 + 2;
74b4a360
JM		 192 end = ptr + key_len_total;
193 wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
194
2cb28a4c
JM		 195 if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
196 wpa_msg(wpa_s, MSG_INFO,
197 "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
198 return;
199 }
200
bdce45b8
JM		 201 while (end - ptr > 1) {
202 if (2 + ptr[1] > end - ptr) {
74b4a360
JM		 203 wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
204 "length");
205 if (end > ptr) {
206 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
207 ptr, end - ptr);
208 }
209 break;
210 }
211 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
212 if (ptr[1] < 11 + 5) {
213 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
214 "subelem");
215 break;
216 }
217 gtk_len = *(ptr + 4);
218 if (ptr[1] < 11 + gtk_len ||
219 gtk_len < 5 || gtk_len > 32) {
220 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
221 "subelem");
222 break;
223 }
224 wpa_wnmsleep_install_key(
225 wpa_s->wpa,
226 WNM_SLEEP_SUBELEM_GTK,
227 ptr);
228 ptr += 13 + gtk_len;
229#ifdef CONFIG_IEEE80211W
230 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
231 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
232 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
233 "subelem");
234 break;
235 }
236 wpa_wnmsleep_install_key(wpa_s->wpa,
237 WNM_SLEEP_SUBELEM_IGTK, ptr);
238 ptr += 10 + WPA_IGTK_LEN;
239#endif /* CONFIG_IEEE80211W */
240 } else
241 break; /* skip the loop */
242 }
243}
244
245
75cad1a0
XC		 246static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
247 const u8 *frm, int len)
248{
249 /*
9a147ba1 250 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
75cad1a0
XC		 251 * WNM-Sleep Mode IE | TFS Response IE
252 */
dacd789f 253 const u8 *pos = frm; /* point to payload after the action field */
9a147ba1 254 u16 key_len_total;
75cad1a0
XC		 255 struct wnm_sleep_element *wnmsleep_ie = NULL;
256 /* multiple TFS Resp IE (assuming consecutive) */
dacd789f
JM		 257 const u8 *tfsresp_ie_start = NULL;
258 const u8 *tfsresp_ie_end = NULL;
fecc09ed 259 size_t left;
75cad1a0 260
03ed0a52
JM		 261 if (!wpa_s->wnmsleep_used) {
262 wpa_printf(MSG_DEBUG,
adae51f8 263 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode operation has not been requested");
03ed0a52
JM		 264 return;
265 }
266
9a147ba1
JM		 267 if (len < 3)
268 return;
269 key_len_total = WPA_GET_LE16(frm + 1);
270
dbfb8e82
JM		 271 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
272 frm[0], key_len_total);
fecc09ed
JM		 273 left = len - 3;
274 if (key_len_total > left) {
68db9ab0
JM		 275 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
276 return;
277 }
fecc09ed 278 pos += 3 + key_len_total;
bdce45b8 279 while (pos - frm + 1 < len) {
75cad1a0 280 u8 ie_len = *(pos + 1);
bdce45b8 281 if (2 + ie_len > frm + len - pos) {
68db9ab0
JM		 282 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
283 break;
284 }
285 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
8acbe7f2 286 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
75cad1a0
XC		 287 wnmsleep_ie = (struct wnm_sleep_element *) pos;
288 else if (*pos == WLAN_EID_TFS_RESP) {
289 if (!tfsresp_ie_start)
290 tfsresp_ie_start = pos;
291 tfsresp_ie_end = pos;
292 } else
293 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
294 pos += ie_len + 2;
295 }
296
297 if (!wnmsleep_ie) {
298 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
299 return;
300 }
301
adae51f8
JM		 302 wpa_s->wnmsleep_used = 0;
303
62f6fbb4
JM		 304 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
305 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
75cad1a0
XC		 306 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
307 "frame (action=%d, intval=%d)",
308 wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc 309 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
74b4a360
JM		 310 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
311 tfsresp_ie_end);
df80a0cc 312 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
74b4a360 313 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
75cad1a0
XC		 314 }
315 } else {
316 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
317 "(action=%d, intval=%d)",
318 wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc 319 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
75cad1a0
XC		 320 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
321 wpa_s->bssid, NULL, NULL);
df80a0cc 322 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
75cad1a0
XC		 323 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
324 wpa_s->bssid, NULL, NULL);
325 }
326}
327
328
e27d20bb
VK		 329void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
330{
331 int i;
332
333 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
e27d20bb 334 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
e27d20bb
VK		 335 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
336 }
337
ec331d09 338 wpa_s->wnm_num_neighbor_report = 0;
e27d20bb
VK		 339 os_free(wpa_s->wnm_neighbor_report_elements);
340 wpa_s->wnm_neighbor_report_elements = NULL;
d514b502
JM		 341
342 wpabuf_free(wpa_s->coloc_intf_elems);
343 wpa_s->coloc_intf_elems = NULL;
e27d20bb
VK		 344}
345
346
347static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
348 u8 id, u8 elen, const u8 *pos)
349{
350 switch (id) {
351 case WNM_NEIGHBOR_TSF:
352 if (elen < 2 + 2) {
353 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
354 break;
355 }
09322678
JM		 356 rep->tsf_offset = WPA_GET_LE16(pos);
357 rep->beacon_int = WPA_GET_LE16(pos + 2);
358 rep->tsf_present = 1;
e27d20bb
VK		 359 break;
360 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
361 if (elen < 2) {
362 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
363 "country string");
364 break;
365 }
09322678
JM		 366 os_memcpy(rep->country, pos, 2);
367 rep->country_present = 1;
e27d20bb
VK		 368 break;
369 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
370 if (elen < 1) {
371 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
372 "candidate");
373 break;
374 }
09322678
JM		 375 rep->preference = pos[0];
376 rep->preference_present = 1;
e27d20bb
VK		 377 break;
378 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
09322678
JM		 379 rep->bss_term_tsf = WPA_GET_LE64(pos);
380 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
381 rep->bss_term_present = 1;
e27d20bb
VK		 382 break;
383 case WNM_NEIGHBOR_BEARING:
384 if (elen < 8) {
385 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
386 "bearing");
387 break;
388 }
09322678
JM		 389 rep->bearing = WPA_GET_LE16(pos);
390 rep->distance = WPA_GET_LE32(pos + 2);
391 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
392 rep->bearing_present = 1;
e27d20bb
VK		 393 break;
394 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
f6ce70dc 395 if (elen < 1) {
e27d20bb
VK		 396 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
397 "pilot");
398 break;
399 }
e9cb7b92 400 os_free(rep->meas_pilot);
e27d20bb
VK		 401 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
402 if (rep->meas_pilot == NULL)
403 break;
e27d20bb 404 rep->meas_pilot->measurement_pilot = pos[0];
f6ce70dc
JM		 405 rep->meas_pilot->subelem_len = elen - 1;
406 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
e27d20bb
VK		 407 break;
408 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
f6ce70dc 409 if (elen < 5) {
e27d20bb
VK		 410 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
411 "capabilities");
412 break;
413 }
09322678
JM		 414 os_memcpy(rep->rm_capab, pos, 5);
415 rep->rm_capab_present = 1;
e27d20bb
VK		 416 break;
417 case WNM_NEIGHBOR_MULTIPLE_BSSID:
f6ce70dc 418 if (elen < 1) {
e27d20bb
VK		 419 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
420 break;
421 }
e9cb7b92 422 os_free(rep->mul_bssid);
e27d20bb
VK		 423 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
424 if (rep->mul_bssid == NULL)
425 break;
e27d20bb 426 rep->mul_bssid->max_bssid_indicator = pos[0];
f6ce70dc
JM		 427 rep->mul_bssid->subelem_len = elen - 1;
428 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
e27d20bb
VK		 429 break;
430 }
431}
432
433
e1117c1c
JM		 434static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
435{
158211b2
JM		 436 struct wpa_bss *bss = wpa_s->current_bss;
437 const char *country = NULL;
80ce804e 438 int freq;
158211b2
JM		 439
440 if (bss) {
441 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
442
443 if (elem && elem[1] >= 2)
444 country = (const char *) (elem + 2);
445 }
446
80ce804e
JM		 447 freq = ieee80211_chan_to_freq(country, op_class, chan);
448 if (freq <= 0 && op_class == 0) {
449 /*
450 * Some APs do not advertise correct operating class
451 * information. Try to determine the most likely operating
452 * frequency based on the channel number.
453 */
454 if (chan >= 1 && chan <= 13)
455 freq = 2407 + chan * 5;
456 else if (chan == 14)
457 freq = 2484;
458 else if (chan >= 36 && chan <= 169)
459 freq = 5000 + chan * 5;
460 }
461 return freq;
e1117c1c
JM		 462}
463
464
e27d20bb
VK		 465static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
466 const u8 *pos, u8 len,
467 struct neighbor_report *rep)
468{
469 u8 left = len;
470
471 if (left < 13) {
472 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
473 return;
474 }
475
476 os_memcpy(rep->bssid, pos, ETH_ALEN);
4c381f0d 477 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
e27d20bb
VK		 478 rep->regulatory_class = *(pos + 10);
479 rep->channel_number = *(pos + 11);
480 rep->phy_type = *(pos + 12);
481
482 pos += 13;
483 left -= 13;
484
485 while (left >= 2) {
486 u8 id, elen;
487
488 id = *pos++;
489 elen = *pos++;
1aa6f953
JM		 490 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
491 left -= 2;
492 if (elen > left) {
493 wpa_printf(MSG_DEBUG,
494 "WNM: Truncated neighbor report subelement");
495 break;
496 }
e27d20bb 497 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
1aa6f953 498 left -= elen;
e27d20bb
VK		 499 pos += elen;
500 }
e1117c1c
JM		 501
502 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
503 rep->channel_number);
e27d20bb
VK		 504}
505
506
af8bc24d
KV		 507static void wnm_clear_acceptable(struct wpa_supplicant *wpa_s)
508{
509 unsigned int i;
510
511 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++)
512 wpa_s->wnm_neighbor_report_elements[i].acceptable = 0;
513}
514
515
516static struct wpa_bss * get_first_acceptable(struct wpa_supplicant *wpa_s)
517{
518 unsigned int i;
519 struct neighbor_report *nei;
520
521 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
522 nei = &wpa_s->wnm_neighbor_report_elements[i];
523 if (nei->acceptable)
524 return wpa_bss_get_bssid(wpa_s, nei->bssid);
525 }
526
527 return NULL;
528}
529
530
531#ifdef CONFIG_MBO
d0b9ab69 532static struct wpa_bss *
af8bc24d
KV		 533get_mbo_transition_candidate(struct wpa_supplicant *wpa_s,
534 enum mbo_transition_reject_reason *reason)
e27d20bb 535{
af8bc24d
KV		 536 struct wpa_bss *target = NULL;
537 struct wpa_bss_trans_info params;
538 struct wpa_bss_candidate_info *info = NULL;
539 struct neighbor_report *nei = wpa_s->wnm_neighbor_report_elements;
540 u8 *first_candidate_bssid = NULL, *pos;
541 unsigned int i;
542
543 params.mbo_transition_reason = wpa_s->wnm_mbo_transition_reason;
544 params.n_candidates = 0;
545 params.bssid = os_calloc(wpa_s->wnm_num_neighbor_report, ETH_ALEN);
546 if (!params.bssid)
547 return NULL;
548
549 pos = params.bssid;
550 for (i = 0; i < wpa_s->wnm_num_neighbor_report; nei++, i++) {
551 if (nei->is_first)
552 first_candidate_bssid = nei->bssid;
553 if (!nei->acceptable)
554 continue;
555 os_memcpy(pos, nei->bssid, ETH_ALEN);
556 pos += ETH_ALEN;
557 params.n_candidates++;
558 }
559
560 if (!params.n_candidates)
561 goto end;
562
563 info = wpa_drv_get_bss_trans_status(wpa_s, &params);
564 if (!info) {
565 /* If failed to get candidate BSS transition status from driver,
566 * get the first acceptable candidate from wpa_supplicant.
567 */
568 target = wpa_bss_get_bssid(wpa_s, params.bssid);
569 goto end;
570 }
571
572 /* Get the first acceptable candidate from driver */
573 for (i = 0; i < info->num; i++) {
574 if (info->candidates[i].is_accept) {
575 target = wpa_bss_get_bssid(wpa_s,
576 info->candidates[i].bssid);
577 goto end;
578 }
579 }
580
581 /* If Disassociation Imminent is set and driver rejects all the
582 * candidate select first acceptable candidate which has
583 * rssi > disassoc_imminent_rssi_threshold
584 */
585 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
586 for (i = 0; i < info->num; i++) {
587 target = wpa_bss_get_bssid(wpa_s,
588 info->candidates[i].bssid);
f2a04874
PRP		 589 if (target &&
590 (target->level <
591 wpa_s->conf->disassoc_imminent_rssi_threshold))
af8bc24d
KV		 592 continue;
593 goto end;
594 }
595 }
596
597 /* While sending BTM reject use reason code of the first candidate
598 * received in BTM request frame
599 */
600 if (reason) {
601 for (i = 0; i < info->num; i++) {
602 if (first_candidate_bssid &&
603 os_memcmp(first_candidate_bssid,
604 info->candidates[i].bssid, ETH_ALEN) == 0)
605 {
606 *reason = info->candidates[i].reject_reason;
607 break;
608 }
609 }
610 }
611
612 target = NULL;
e27d20bb 613
af8bc24d
KV		 614end:
615 os_free(params.bssid);
616 if (info) {
617 os_free(info->candidates);
618 os_free(info);
619 }
620 return target;
621}
622#endif /* CONFIG_MBO */
623
624
625static struct wpa_bss *
626compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs,
627 enum mbo_transition_reject_reason *reason)
628{
d0b9ab69 629 u8 i;
027454d2 630 struct wpa_bss *bss = wpa_s->current_bss;
d0b9ab69 631 struct wpa_bss *target;
e27d20bb 632
d0b9ab69 633 if (!bss)
9e080bf3 634 return NULL;
e27d20bb 635
3c1060ff 636 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
027454d2 637 MAC2STR(wpa_s->bssid), bss->level);
3c1060ff 638
af8bc24d
KV		 639 wnm_clear_acceptable(wpa_s);
640
d0b9ab69
JM		 641 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
642 struct neighbor_report *nei;
027454d2 643
d0b9ab69 644 nei = &wpa_s->wnm_neighbor_report_elements[i];
027454d2
JM		 645 if (nei->preference_present && nei->preference == 0) {
646 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
647 MAC2STR(nei->bssid));
648 continue;
649 }
650
d0b9ab69
JM		 651 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
652 if (!target) {
027454d2
JM		 653 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
654 " (pref %d) not found in scan results",
655 MAC2STR(nei->bssid),
656 nei->preference_present ? nei->preference :
657 -1);
658 continue;
659 }
660
2f195639
KV		 661 if (age_secs) {
662 struct os_reltime now;
663
664 if (os_get_reltime(&now) == 0 &&
665 os_reltime_expired(&now, &target->last_update,
666 age_secs)) {
667 wpa_printf(MSG_DEBUG,
668 "Candidate BSS is more than %ld seconds old",
669 age_secs);
670 continue;
671 }
672 }
673
d0b9ab69
JM		 674 if (bss->ssid_len != target->ssid_len ||
675 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
027454d2
JM		 676 /*
677 * TODO: Could consider allowing transition to another
678 * ESS if PMF was enabled for the association.
679 */
680 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
681 " (pref %d) in different ESS",
682 MAC2STR(nei->bssid),
683 nei->preference_present ? nei->preference :
684 -1);
685 continue;
686 }
687
cbc3d6fe
JM		 688 if (wpa_s->current_ssid &&
689 !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
e65a87b3 690 1, 0)) {
cbc3d6fe
JM		 691 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
692 " (pref %d) does not match the current network profile",
693 MAC2STR(nei->bssid),
694 nei->preference_present ? nei->preference :
695 -1);
696 continue;
697 }
698
dd599908
AS		 699 if (wpa_is_bss_tmp_disallowed(wpa_s, target->bssid)) {
700 wpa_printf(MSG_DEBUG,
701 "MBO: Candidate BSS " MACSTR
702 " retry delay is not over yet",
703 MAC2STR(nei->bssid));
704 continue;
705 }
706
d0b9ab69 707 if (target->level < bss->level && target->level < -80) {
027454d2
JM		 708 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
709 " (pref %d) does not have sufficient signal level (%d)",
710 MAC2STR(nei->bssid),
711 nei->preference_present ? nei->preference :
712 -1,
d0b9ab69 713 target->level);
027454d2
JM		 714 continue;
715 }
716
af8bc24d
KV		 717 nei->acceptable = 1;
718 }
719
720#ifdef CONFIG_MBO
721 if (wpa_s->wnm_mbo_trans_reason_present)
722 target = get_mbo_transition_candidate(wpa_s, reason);
723 else
724 target = get_first_acceptable(wpa_s);
725#else /* CONFIG_MBO */
726 target = get_first_acceptable(wpa_s);
727#endif /* CONFIG_MBO */
728
729 if (target) {
027454d2 730 wpa_printf(MSG_DEBUG,
d0b9ab69 731 "WNM: Found an acceptable preferred transition candidate BSS "
027454d2 732 MACSTR " (RSSI %d)",
af8bc24d 733 MAC2STR(target->bssid), target->level);
e27d20bb
VK		 734 }
735
af8bc24d 736 return target;
e27d20bb
VK		 737}
738
739
84d1c0fd
AS		 740static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
741{
742 const u8 *ie_a, *ie_b;
743
744 if (!a || !b)
745 return 0;
746
747 ie_a = wpa_bss_get_ie(a, eid);
748 ie_b = wpa_bss_get_ie(b, eid);
749
750 if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
751 return 0;
752
753 return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
754}
755
756
757static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
758{
759 u32 info = 0;
760
761 info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
762
763 /*
764 * Leave the security and key scope bits unset to indicate that the
765 * security information is not available.
766 */
767
768 if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
769 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
770 if (bss->caps & WLAN_CAPABILITY_QOS)
771 info |= NEI_REP_BSSID_INFO_QOS;
772 if (bss->caps & WLAN_CAPABILITY_APSD)
773 info |= NEI_REP_BSSID_INFO_APSD;
774 if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
775 info |= NEI_REP_BSSID_INFO_RM;
776 if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
777 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
778 if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
779 info |= NEI_REP_BSSID_INFO_IMM_BA;
780 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
781 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
782 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
783 info |= NEI_REP_BSSID_INFO_HT;
784
785 return info;
786}
787
788
13bf18ed
AS		 789static int wnm_add_nei_rep(struct wpabuf **buf, const u8 *bssid,
790 u32 bss_info, u8 op_class, u8 chan, u8 phy_type,
791 u8 pref)
84d1c0fd 792{
13bf18ed
AS		 793 if (wpabuf_len(*buf) + 18 >
794 IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN) {
795 wpa_printf(MSG_DEBUG,
796 "WNM: No room in frame for Neighbor Report element");
797 return -1;
798 }
84d1c0fd 799
13bf18ed 800 if (wpabuf_resize(buf, 18) < 0) {
84d1c0fd 801 wpa_printf(MSG_DEBUG,
13bf18ed 802 "WNM: Failed to allocate memory for Neighbor Report element");
84d1c0fd
AS		 803 return -1;
804 }
805
13bf18ed 806 wpabuf_put_u8(*buf, WLAN_EID_NEIGHBOR_REPORT);
84d1c0fd 807 /* length: 13 for basic neighbor report + 3 for preference subelement */
13bf18ed
AS		 808 wpabuf_put_u8(*buf, 16);
809 wpabuf_put_data(*buf, bssid, ETH_ALEN);
810 wpabuf_put_le32(*buf, bss_info);
811 wpabuf_put_u8(*buf, op_class);
812 wpabuf_put_u8(*buf, chan);
813 wpabuf_put_u8(*buf, phy_type);
814 wpabuf_put_u8(*buf, WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE);
815 wpabuf_put_u8(*buf, 1);
816 wpabuf_put_u8(*buf, pref);
817 return 0;
84d1c0fd
AS		 818}
819
820
821static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
13bf18ed 822 struct wpa_bss *bss, struct wpabuf **buf,
84d1c0fd
AS		 823 u8 pref)
824{
825 const u8 *ie;
826 u8 op_class, chan;
827 int sec_chan = 0, vht = 0;
828 enum phy_type phy_type;
829 u32 info;
830 struct ieee80211_ht_operation *ht_oper = NULL;
831 struct ieee80211_vht_operation *vht_oper = NULL;
832
833 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
834 if (ie && ie[1] >= 2) {
835 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
836
837 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
838 sec_chan = 1;
839 else if (ht_oper->ht_param &
840 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
841 sec_chan = -1;
842 }
843
844 ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
845 if (ie && ie[1] >= 1) {
846 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
847
848 if (vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80MHZ ||
849 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_160MHZ ||
850 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80P80MHZ)
851 vht = vht_oper->vht_op_info_chwidth;
852 }
853
854 if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
855 &chan) == NUM_HOSTAPD_MODES) {
856 wpa_printf(MSG_DEBUG,
857 "WNM: Cannot determine operating class and channel");
858 return -2;
859 }
860
861 phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
862 (vht_oper != NULL));
863 if (phy_type == PHY_TYPE_UNSPECIFIED) {
864 wpa_printf(MSG_DEBUG,
865 "WNM: Cannot determine BSS phy type for Neighbor Report");
866 return -2;
867 }
868
869 info = wnm_get_bss_info(wpa_s, bss);
870
13bf18ed
AS		 871 return wnm_add_nei_rep(buf, bss->bssid, info, op_class, chan, phy_type,
872 pref);
84d1c0fd
AS		 873}
874
875
13bf18ed 876static void wnm_add_cand_list(struct wpa_supplicant *wpa_s, struct wpabuf **buf)
84d1c0fd 877{
84d1c0fd
AS		 878 unsigned int i, pref = 255;
879 struct os_reltime now;
880 struct wpa_ssid *ssid = wpa_s->current_ssid;
881
882 if (!ssid)
13bf18ed 883 return;
84d1c0fd
AS		 884
885 /*
886 * TODO: Define when scan results are no longer valid for the candidate
887 * list.
888 */
889 os_get_reltime(&now);
890 if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
13bf18ed 891 return;
84d1c0fd
AS		 892
893 wpa_printf(MSG_DEBUG,
894 "WNM: Add candidate list to BSS Transition Management Response frame");
895 for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
896 struct wpa_bss *bss = wpa_s->last_scan_res[i];
897 int res;
898
e65a87b3 899 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1, 0)) {
13bf18ed 900 res = wnm_nei_rep_add_bss(wpa_s, bss, buf, pref--);
84d1c0fd
AS		 901 if (res == -2)
902 continue; /* could not build entry for BSS */
903 if (res < 0)
904 break; /* no more room for candidates */
905 if (pref == 1)
906 break;
84d1c0fd
AS		 907 }
908 }
909
13bf18ed
AS		 910 wpa_hexdump_buf(MSG_DEBUG,
911 "WNM: BSS Transition Management Response candidate list",
912 *buf);
84d1c0fd
AS		 913}
914
915
13bf18ed
AS		 916#define BTM_RESP_MIN_SIZE 5 + ETH_ALEN
917
7b53acd3
JM		 918static void wnm_send_bss_transition_mgmt_resp(
919 struct wpa_supplicant *wpa_s, u8 dialog_token,
af8bc24d
KV		 920 enum bss_trans_mgmt_status_code status,
921 enum mbo_transition_reject_reason reason,
922 u8 delay, const u8 *target_bssid)
2049a875 923{
13bf18ed 924 struct wpabuf *buf;
f5f3728a 925 int res;
2049a875 926
af8bc24d
KV		 927 wpa_printf(MSG_DEBUG,
928 "WNM: Send BSS Transition Management Response to " MACSTR
929 " dialog_token=%u status=%u reason=%u delay=%d",
930 MAC2STR(wpa_s->bssid), dialog_token, status, reason, delay);
d0b9ab69
JM		 931 if (!wpa_s->current_bss) {
932 wpa_printf(MSG_DEBUG,
933 "WNM: Current BSS not known - drop response");
934 return;
935 }
2049a875 936
13bf18ed
AS		 937 buf = wpabuf_alloc(BTM_RESP_MIN_SIZE);
938 if (!buf) {
939 wpa_printf(MSG_DEBUG,
940 "WNM: Failed to allocate memory for BTM response");
941 return;
942 }
943
944 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
945 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_RESP);
946 wpabuf_put_u8(buf, dialog_token);
947 wpabuf_put_u8(buf, status);
948 wpabuf_put_u8(buf, delay);
2049a875 949 if (target_bssid) {
13bf18ed 950 wpabuf_put_data(buf, target_bssid, ETH_ALEN);
2cd0f6a4
JM		 951 } else if (status == WNM_BSS_TM_ACCEPT) {
952 /*
953 * P802.11-REVmc clarifies that the Target BSSID field is always
954 * present when status code is zero, so use a fake value here if
955 * no BSSID is yet known.
956 */
13bf18ed 957 wpabuf_put_data(buf, "\0\0\0\0\0\0", ETH_ALEN);
2049a875
JM		 958 }
959
84d1c0fd 960 if (status == WNM_BSS_TM_ACCEPT)
13bf18ed 961 wnm_add_cand_list(wpa_s, &buf);
84d1c0fd 962
c8082d2b 963#ifdef CONFIG_MBO
af8bc24d
KV		 964 if (status != WNM_BSS_TM_ACCEPT &&
965 wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) {
13bf18ed
AS		 966 u8 mbo[10];
967 size_t ret;
968
969 ret = wpas_mbo_ie_bss_trans_reject(wpa_s, mbo, sizeof(mbo),
970 reason);
971 if (ret) {
972 if (wpabuf_resize(&buf, ret) < 0) {
973 wpabuf_free(buf);
974 wpa_printf(MSG_DEBUG,
975 "WNM: Failed to allocate memory for MBO IE");
976 return;
977 }
978
979 wpabuf_put_data(buf, mbo, ret);
980 }
c8082d2b
AS		 981 }
982#endif /* CONFIG_MBO */
983
f5f3728a
JM		 984 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
985 wpa_s->own_addr, wpa_s->bssid,
13bf18ed 986 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
f5f3728a
JM		 987 if (res < 0) {
988 wpa_printf(MSG_DEBUG,
989 "WNM: Failed to send BSS Transition Management Response");
990 }
13bf18ed
AS		 991
992 wpabuf_free(buf);
2049a875
JM		 993}
994
995
2f195639
KV		 996static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
997 struct wpa_bss *bss, struct wpa_ssid *ssid,
998 int after_new_scan)
999{
1000 wpa_dbg(wpa_s, MSG_DEBUG,
1001 "WNM: Transition to BSS " MACSTR
1002 " based on BSS Transition Management Request (old BSSID "
1003 MACSTR " after_new_scan=%d)",
1004 MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan);
1005
1006 /* Send the BSS Management Response - Accept */
1007 if (wpa_s->wnm_reply) {
1008 wpa_s->wnm_reply = 0;
1009 wpa_printf(MSG_DEBUG,
1010 "WNM: Sending successful BSS Transition Management Response");
af8bc24d
KV		 1011 wnm_send_bss_transition_mgmt_resp(
1012 wpa_s, wpa_s->wnm_dialog_token, WNM_BSS_TM_ACCEPT,
6a4363f5
VK		 1013 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1014 bss->bssid);
2f195639
KV		 1015 }
1016
1017 if (bss == wpa_s->current_bss) {
1018 wpa_printf(MSG_DEBUG,
1019 "WNM: Already associated with the preferred candidate");
1020 wnm_deallocate_memory(wpa_s);
1021 return;
1022 }
1023
1024 wpa_s->reassociate = 1;
1025 wpa_printf(MSG_DEBUG, "WNM: Issuing connect");
1026 wpa_supplicant_connect(wpa_s, bss, ssid);
1027 wnm_deallocate_memory(wpa_s);
1028}
1029
1030
75d65857 1031int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
e27d20bb 1032{
d0b9ab69
JM		 1033 struct wpa_bss *bss;
1034 struct wpa_ssid *ssid = wpa_s->current_ssid;
1035 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
af8bc24d
KV		 1036 enum mbo_transition_reject_reason reason =
1037 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED;
e27d20bb 1038
d0b9ab69
JM		 1039 if (!wpa_s->wnm_neighbor_report_elements)
1040 return 0;
1041
2f195639
KV		 1042 wpa_dbg(wpa_s, MSG_DEBUG,
1043 "WNM: Process scan results for BSS Transition Management");
d0b9ab69
JM		 1044 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
1045 &wpa_s->scan_trigger_time)) {
1046 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
1047 wnm_deallocate_memory(wpa_s);
1048 return 0;
1049 }
1050
1051 if (!wpa_s->current_bss ||
1052 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
1053 ETH_ALEN) != 0) {
1054 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
1055 return 0;
e27d20bb
VK		 1056 }
1057
1058 /* Compare the Neighbor Report and scan results */
af8bc24d 1059 bss = compare_scan_neighbor_results(wpa_s, 0, &reason);
d0b9ab69
JM		 1060 if (!bss) {
1061 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
1062 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
1063 goto send_bss_resp_fail;
1064 }
e27d20bb 1065
d0b9ab69 1066 /* Associate to the network */
2f195639 1067 wnm_bss_tm_connect(wpa_s, bss, ssid, 1);
d0b9ab69
JM		 1068 return 1;
1069
e27d20bb 1070send_bss_resp_fail:
75d65857
JM		 1071 if (!reply_on_fail)
1072 return 0;
1073
1074 /* Send reject response for all the failures */
1075
e27d20bb 1076 if (wpa_s->wnm_reply) {
d0b9ab69 1077 wpa_s->wnm_reply = 0;
e27d20bb
VK		 1078 wnm_send_bss_transition_mgmt_resp(wpa_s,
1079 wpa_s->wnm_dialog_token,
af8bc24d 1080 status, reason, 0, NULL);
e27d20bb 1081 }
d0b9ab69
JM		 1082 wnm_deallocate_memory(wpa_s);
1083
1084 return 0;
e27d20bb
VK		 1085}
1086
1087
ff2c5758
JM		 1088static int cand_pref_compar(const void *a, const void *b)
1089{
1090 const struct neighbor_report *aa = a;
1091 const struct neighbor_report *bb = b;
1092
1093 if (!aa->preference_present && !bb->preference_present)
1094 return 0;
1095 if (!aa->preference_present)
1096 return 1;
1097 if (!bb->preference_present)
1098 return -1;
1099 if (bb->preference > aa->preference)
1100 return 1;
1101 if (bb->preference < aa->preference)
1102 return -1;
1103 return 0;
1104}
1105
1106
1107static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
1108{
1109 if (!wpa_s->wnm_neighbor_report_elements)
1110 return;
1111 qsort(wpa_s->wnm_neighbor_report_elements,
1112 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
1113 cand_pref_compar);
1114}
1115
1116
8040dc53
JM		 1117static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
1118{
1119 unsigned int i;
1120
1121 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
1122 if (!wpa_s->wnm_neighbor_report_elements)
1123 return;
1124 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1125 struct neighbor_report *nei;
1126
1127 nei = &wpa_s->wnm_neighbor_report_elements[i];
1128 wpa_printf(MSG_DEBUG, "%u: " MACSTR
e1117c1c 1129 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
4c381f0d
JM		 1130 i, MAC2STR(nei->bssid), nei->bssid_info,
1131 nei->regulatory_class,
8040dc53 1132 nei->channel_number, nei->phy_type,
e1117c1c
JM		 1133 nei->preference_present ? nei->preference : -1,
1134 nei->freq);
1135 }
1136}
1137
1138
1139static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
1140{
1141 unsigned int i;
1142
1143 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1144 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
1145 int j;
1146
1147 for (j = 0; j < mode->num_channels; j++) {
1148 struct hostapd_channel_data *chan;
1149
1150 chan = &mode->channels[j];
1151 if (chan->freq == freq &&
1152 !(chan->flag & HOSTAPD_CHAN_DISABLED))
1153 return 1;
1154 }
1155 }
1156
1157 return 0;
1158}
1159
1160
1161static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
1162{
1163 int *freqs;
1164 int num_freqs = 0;
1165 unsigned int i;
1166
1167 if (!wpa_s->wnm_neighbor_report_elements)
1168 return;
1169
1170 if (wpa_s->hw.modes == NULL)
1171 return;
1172
1173 os_free(wpa_s->next_scan_freqs);
1174 wpa_s->next_scan_freqs = NULL;
1175
1176 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
1177 if (freqs == NULL)
1178 return;
1179
1180 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1181 struct neighbor_report *nei;
1182
1183 nei = &wpa_s->wnm_neighbor_report_elements[i];
1184 if (nei->freq <= 0) {
1185 wpa_printf(MSG_DEBUG,
1186 "WNM: Unknown neighbor operating frequency for "
1187 MACSTR " - scan all channels",
1188 MAC2STR(nei->bssid));
1189 os_free(freqs);
1190 return;
1191 }
1192 if (chan_supported(wpa_s, nei->freq))
1193 add_freq(freqs, &num_freqs, nei->freq);
8040dc53 1194 }
e1117c1c
JM		 1195
1196 if (num_freqs == 0) {
1197 os_free(freqs);
1198 return;
1199 }
1200
1201 wpa_printf(MSG_DEBUG,
1202 "WNM: Scan %d frequencies based on transition candidate list",
1203 num_freqs);
1204 wpa_s->next_scan_freqs = freqs;
8040dc53
JM		 1205}
1206
1207
2f195639
KV		 1208static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
1209{
1210 struct wpa_scan_results *scan_res;
1211 struct wpa_bss *bss;
1212 struct wpa_ssid *ssid = wpa_s->current_ssid;
1213 u8 i, found = 0;
1214 size_t j;
1215
1216 wpa_dbg(wpa_s, MSG_DEBUG,
1217 "WNM: Fetch current scan results from the driver for checking transition candidates");
1218 scan_res = wpa_drv_get_scan_results2(wpa_s);
1219 if (!scan_res) {
1220 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
1221 return 0;
1222 }
1223
1224 if (scan_res->fetch_time.sec == 0)
1225 os_get_reltime(&scan_res->fetch_time);
1226
1227 filter_scan_res(wpa_s, scan_res);
1228
1229 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1230 struct neighbor_report *nei;
1231
1232 nei = &wpa_s->wnm_neighbor_report_elements[i];
1233 if (nei->preference_present && nei->preference == 0)
1234 continue;
1235
1236 for (j = 0; j < scan_res->num; j++) {
1237 struct wpa_scan_res *res;
1238 const u8 *ssid_ie;
1239
1240 res = scan_res->res[j];
1241 if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
1242 res->age > WNM_SCAN_RESULT_AGE * 1000)
1243 continue;
1244 bss = wpa_s->current_bss;
1245 ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
1246 if (bss && ssid_ie &&
1247 (bss->ssid_len != ssid_ie[1] ||
1248 os_memcmp(bss->ssid, ssid_ie + 2,
1249 bss->ssid_len) != 0))
1250 continue;
1251
1252 /* Potential candidate found */
1253 found = 1;
1254 scan_snr(res);
1255 scan_est_throughput(wpa_s, res);
1256 wpa_bss_update_scan_res(wpa_s, res,
1257 &scan_res->fetch_time);
1258 }
1259 }
1260
1261 wpa_scan_results_free(scan_res);
1262 if (!found) {
1263 wpa_dbg(wpa_s, MSG_DEBUG,
1264 "WNM: No transition candidate matches existing scan results");
1265 return 0;
1266 }
1267
af8bc24d 1268 bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL);
2f195639
KV		 1269 if (!bss) {
1270 wpa_dbg(wpa_s, MSG_DEBUG,
1271 "WNM: Comparison of scan results against transition candidates did not find matches");
1272 return 0;
1273 }
1274
1275 /* Associate to the network */
1276 wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
1277 return 1;
1278}
1279
1280
2049a875
JM		 1281static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1282 const u8 *pos, const u8 *end,
1283 int reply)
1284{
8c9af762
JM		 1285 unsigned int beacon_int;
1286 u8 valid_int;
dd599908
AS		 1287#ifdef CONFIG_MBO
1288 const u8 *vendor;
1289#endif /* CONFIG_MBO */
8c9af762 1290
bdce45b8 1291 if (end - pos < 5)
2049a875
JM		 1292 return;
1293
af8bc24d
KV		 1294#ifdef CONFIG_MBO
1295 wpa_s->wnm_mbo_trans_reason_present = 0;
1296 wpa_s->wnm_mbo_transition_reason = 0;
1297#endif /* CONFIG_MBO */
1298
8c9af762
JM		 1299 if (wpa_s->current_bss)
1300 beacon_int = wpa_s->current_bss->beacon_int;
1301 else
1302 beacon_int = 100; /* best guess */
1303
e27d20bb
VK		 1304 wpa_s->wnm_dialog_token = pos[0];
1305 wpa_s->wnm_mode = pos[1];
1306 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
8c9af762 1307 valid_int = pos[4];
e27d20bb 1308 wpa_s->wnm_reply = reply;
2049a875
JM		 1309
1310 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1311 "dialog_token=%u request_mode=0x%x "
1312 "disassoc_timer=%u validity_interval=%u",
e27d20bb 1313 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
8c9af762 1314 wpa_s->wnm_dissoc_timer, valid_int);
e27d20bb 1315
a483c6f1 1316#if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS)
1317 if (wpa_s->reject_btm_req_reason) {
1318 wpa_printf(MSG_INFO,
1319 "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d",
1320 wpa_s->reject_btm_req_reason);
af8bc24d
KV		 1321 wnm_send_bss_transition_mgmt_resp(
1322 wpa_s, wpa_s->wnm_dialog_token,
1323 wpa_s->reject_btm_req_reason,
6a4363f5 1324 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
a483c6f1 1325 return;
1326 }
1327#endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */
1328
2049a875 1329 pos += 5;
e27d20bb 1330
7b53acd3 1331 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
bdce45b8 1332 if (end - pos < 12) {
e27d20bb
VK		 1333 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1334 return;
1335 }
1336 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
2049a875 1337 pos += 12; /* BSS Termination Duration */
e27d20bb
VK		 1338 }
1339
7b53acd3 1340 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
2049a875 1341 char url[256];
ae8535b6 1342
bdce45b8 1343 if (end - pos < 1 || 1 + pos[0] > end - pos) {
2049a875
JM		 1344 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1345 "Management Request (URL)");
1346 return;
1347 }
1348 os_memcpy(url, pos + 1, pos[0]);
1349 url[pos[0]] = '\0';
e27d20bb 1350 pos += 1 + pos[0];
ae8535b6 1351
ae8535b6
JM		 1352 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1353 wpa_sm_pmf_enabled(wpa_s->wpa),
1354 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
2049a875
JM		 1355 }
1356
7b53acd3 1357 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
2049a875 1358 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
e27d20bb
VK		 1359 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1360 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
2049a875
JM		 1361 /* TODO: mark current BSS less preferred for
1362 * selection */
1363 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1364 wpa_supplicant_req_scan(wpa_s, 0, 0);
1365 }
1366 }
1367
dd599908
AS		 1368#ifdef CONFIG_MBO
1369 vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
1370 if (vendor)
1371 wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
1372#endif /* CONFIG_MBO */
1373
7b53acd3 1374 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
8c9af762
JM		 1375 unsigned int valid_ms;
1376
e27d20bb 1377 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
279b5486 1378 wnm_deallocate_memory(wpa_s);
faebdeaa
JM		 1379 wpa_s->wnm_neighbor_report_elements = os_calloc(
1380 WNM_MAX_NEIGHBOR_REPORT,
e27d20bb
VK		 1381 sizeof(struct neighbor_report));
1382 if (wpa_s->wnm_neighbor_report_elements == NULL)
1383 return;
1384
bdce45b8 1385 while (end - pos >= 2 &&
e27d20bb
VK		 1386 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1387 {
1388 u8 tag = *pos++;
1389 u8 len = *pos++;
1390
1391 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1392 tag);
bdce45b8 1393 if (len > end - pos) {
e27d20bb
VK		 1394 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1395 return;
1396 }
1aa6f953
JM		 1397 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1398 struct neighbor_report *rep;
1399 rep = &wpa_s->wnm_neighbor_report_elements[
1400 wpa_s->wnm_num_neighbor_report];
1401 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
f420577f 1402 wpa_s->wnm_num_neighbor_report++;
af8bc24d
KV		 1403#ifdef CONFIG_MBO
1404 if (wpa_s->wnm_mbo_trans_reason_present &&
1405 wpa_s->wnm_num_neighbor_report == 1) {
1406 rep->is_first = 1;
1407 wpa_printf(MSG_DEBUG,
1408 "WNM: First transition candidate is "
1409 MACSTR, MAC2STR(rep->bssid));
1410 }
1411#endif /* CONFIG_MBO */
1aa6f953 1412 }
e27d20bb
VK		 1413
1414 pos += len;
e27d20bb 1415 }
d14e63a2
AS		 1416
1417 if (!wpa_s->wnm_num_neighbor_report) {
1418 wpa_printf(MSG_DEBUG,
1419 "WNM: Candidate list included bit is set, but no candidates found");
1420 wnm_send_bss_transition_mgmt_resp(
1421 wpa_s, wpa_s->wnm_dialog_token,
1422 WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
6a4363f5
VK		 1423 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1424 NULL);
d14e63a2
AS		 1425 return;
1426 }
1427
ff2c5758 1428 wnm_sort_cand_list(wpa_s);
8040dc53 1429 wnm_dump_cand_list(wpa_s);
8c9af762
JM		 1430 valid_ms = valid_int * beacon_int * 128 / 125;
1431 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1432 valid_ms);
1433 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1434 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1435 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1436 wpa_s->wnm_cand_valid_until.sec +=
1437 wpa_s->wnm_cand_valid_until.usec / 1000000;
1438 wpa_s->wnm_cand_valid_until.usec %= 1000000;
d0b9ab69 1439 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
e27d20bb 1440
2f195639
KV		 1441 /*
1442 * Fetch the latest scan results from the kernel and check for
1443 * candidates based on those results first. This can help in
1444 * finding more up-to-date information should the driver has
1445 * done some internal scanning operations after the last scan
1446 * result update in wpa_supplicant.
1447 */
1448 if (wnm_fetch_scan_results(wpa_s) > 0)
1449 return;
1450
1451 /*
1452 * Try to use previously received scan results, if they are
1453 * recent enough to use for a connection.
1454 */
75d65857
JM		 1455 if (wpa_s->last_scan_res_used > 0) {
1456 struct os_reltime now;
1457
1458 os_get_reltime(&now);
1459 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1460 wpa_printf(MSG_DEBUG,
1461 "WNM: Try to use recent scan results");
1462 if (wnm_scan_process(wpa_s, 0) > 0)
1463 return;
1464 wpa_printf(MSG_DEBUG,
1465 "WNM: No match in previous scan results - try a new scan");
1466 }
1467 }
1468
e1117c1c 1469 wnm_set_scan_freqs(wpa_s);
0645492e
JM		 1470 if (wpa_s->wnm_num_neighbor_report == 1) {
1471 os_memcpy(wpa_s->next_scan_bssid,
1472 wpa_s->wnm_neighbor_report_elements[0].bssid,
1473 ETH_ALEN);
1474 wpa_printf(MSG_DEBUG,
1475 "WNM: Scan only for a specific BSSID since there is only a single candidate "
1476 MACSTR, MAC2STR(wpa_s->next_scan_bssid));
1477 }
e27d20bb
VK		 1478 wpa_supplicant_req_scan(wpa_s, 0, 0);
1479 } else if (reply) {
6df634fa
JM		 1480 enum bss_trans_mgmt_status_code status;
1481 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1482 status = WNM_BSS_TM_ACCEPT;
1483 else {
1484 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1485 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1486 }
af8bc24d
KV		 1487 wnm_send_bss_transition_mgmt_resp(
1488 wpa_s, wpa_s->wnm_dialog_token, status,
6a4363f5 1489 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
2049a875
JM		 1490 }
1491}
1492
1493
13bf18ed
AS		 1494#define BTM_QUERY_MIN_SIZE 4
1495
65bcd0a9 1496int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
15ab61ed
AS		 1497 u8 query_reason,
1498 const char *btm_candidates,
1499 int cand_list)
65bcd0a9 1500{
13bf18ed 1501 struct wpabuf *buf;
65bcd0a9
VK		 1502 int ret;
1503
1504 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
9a493fab
AS		 1505 MACSTR " query_reason=%u%s",
1506 MAC2STR(wpa_s->bssid), query_reason,
1507 cand_list ? " candidate list" : "");
65bcd0a9 1508
13bf18ed
AS		 1509 buf = wpabuf_alloc(BTM_QUERY_MIN_SIZE);
1510 if (!buf)
1511 return -1;
65bcd0a9 1512
13bf18ed
AS		 1513 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1514 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_QUERY);
1515 wpabuf_put_u8(buf, 1);
1516 wpabuf_put_u8(buf, query_reason);
9a493fab 1517
13bf18ed
AS		 1518 if (cand_list)
1519 wnm_add_cand_list(wpa_s, &buf);
65bcd0a9 1520
15ab61ed
AS		 1521 if (btm_candidates) {
1522 const size_t max_len = 1000;
1523
1524 ret = wpabuf_resize(&buf, max_len);
1525 if (ret < 0) {
1526 wpabuf_free(buf);
1527 return ret;
1528 }
1529
1530 ret = ieee802_11_parse_candidate_list(btm_candidates,
1531 wpabuf_put(buf, 0),
1532 max_len);
1533 if (ret < 0) {
1534 wpabuf_free(buf);
1535 return ret;
1536 }
1537
1538 wpabuf_put(buf, ret);
1539 }
1540
65bcd0a9
VK		 1541 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1542 wpa_s->own_addr, wpa_s->bssid,
13bf18ed 1543 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
65bcd0a9 1544
13bf18ed 1545 wpabuf_free(buf);
65bcd0a9
VK		 1546 return ret;
1547}
1548
1549
95a3ea94
JM		 1550static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1551 const u8 *sa, const u8 *data,
1552 int len)
1553{
7ef69479 1554 const u8 *pos, *end, *next;
95a3ea94
JM		 1555 u8 ie, ie_len;
1556
1557 pos = data;
1558 end = data + len;
1559
bdce45b8 1560 while (end - pos > 1) {
95a3ea94
JM		 1561 ie = *pos++;
1562 ie_len = *pos++;
1563 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1564 ie, ie_len);
1565 if (ie_len > end - pos) {
1566 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1567 "subelement");
1568 break;
1569 }
7ef69479
JM		 1570 next = pos + ie_len;
1571 if (ie_len < 4) {
1572 pos = next;
1573 continue;
1574 }
1575 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1576 WPA_GET_BE24(pos), pos[3]);
95a3ea94
JM		 1577
1578#ifdef CONFIG_HS20
1579 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1580 WPA_GET_BE24(pos) == OUI_WFA &&
1581 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1582 /* Subscription Remediation subelement */
1583 const u8 *ie_end;
1584 u8 url_len;
1585 char *url;
1586 u8 osu_method;
1587
1588 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1589 "subelement");
1590 ie_end = pos + ie_len;
1591 pos += 4;
1592 url_len = *pos++;
1593 if (url_len == 0) {
1594 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1595 url = NULL;
1596 osu_method = 1;
1597 } else {
bdce45b8 1598 if (url_len + 1 > ie_end - pos) {
95a3ea94
JM		 1599 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1600 url_len,
1601 (int) (ie_end - pos));
1602 break;
1603 }
1604 url = os_malloc(url_len + 1);
1605 if (url == NULL)
1606 break;
1607 os_memcpy(url, pos, url_len);
1608 url[url_len] = '\0';
1609 osu_method = pos[url_len];
1610 }
1611 hs20_rx_subscription_remediation(wpa_s, url,
1612 osu_method);
1613 os_free(url);
7ef69479
JM		 1614 pos = next;
1615 continue;
1616 }
1617
1618 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1619 WPA_GET_BE24(pos) == OUI_WFA &&
1620 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1621 const u8 *ie_end;
1622 u8 url_len;
1623 char *url;
1624 u8 code;
1625 u16 reauth_delay;
1626
1627 ie_end = pos + ie_len;
1628 pos += 4;
1629 code = *pos++;
1630 reauth_delay = WPA_GET_LE16(pos);
1631 pos += 2;
1632 url_len = *pos++;
1633 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1634 "Imminent - Reason Code %u "
1635 "Re-Auth Delay %u URL Length %u",
1636 code, reauth_delay, url_len);
bdce45b8 1637 if (url_len > ie_end - pos)
7ef69479
JM		 1638 break;
1639 url = os_malloc(url_len + 1);
1640 if (url == NULL)
1641 break;
1642 os_memcpy(url, pos, url_len);
1643 url[url_len] = '\0';
1644 hs20_rx_deauth_imminent_notice(wpa_s, code,
1645 reauth_delay, url);
7fc6a024
JM		 1646 os_free(url);
1647 pos = next;
1648 continue;
1649 }
1650
1651 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1652 WPA_GET_BE24(pos) == OUI_WFA &&
1653 pos[3] == HS20_WNM_T_C_ACCEPTANCE) {
1654 const u8 *ie_end;
1655 u8 url_len;
1656 char *url;
1657
1658 ie_end = pos + ie_len;
1659 pos += 4;
1660 url_len = *pos++;
1661 wpa_printf(MSG_DEBUG,
1662 "WNM: HS 2.0 Terms and Conditions Acceptance (URL Length %u)",
1663 url_len);
1664 if (url_len > ie_end - pos)
1665 break;
1666 url = os_malloc(url_len + 1);
1667 if (!url)
1668 break;
1669 os_memcpy(url, pos, url_len);
1670 url[url_len] = '\0';
1671 hs20_rx_t_c_acceptance(wpa_s, url);
7ef69479
JM		 1672 os_free(url);
1673 pos = next;
1674 continue;
95a3ea94
JM		 1675 }
1676#endif /* CONFIG_HS20 */
1677
7ef69479 1678 pos = next;
95a3ea94
JM		 1679 }
1680}
1681
1682
1683static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1684 const u8 *sa, const u8 *frm, int len)
1685{
1686 const u8 *pos, *end;
1687 u8 dialog_token, type;
1688
1689 /* Dialog Token [1] | Type [1] | Subelements */
1690
1691 if (len < 2 || sa == NULL)
1692 return;
1693 end = frm + len;
1694 pos = frm;
1695 dialog_token = *pos++;
1696 type = *pos++;
1697
1698 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1699 "(dialog_token %u type %u sa " MACSTR ")",
1700 dialog_token, type, MAC2STR(sa));
1701 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1702 pos, end - pos);
1703
1704 if (wpa_s->wpa_state != WPA_COMPLETED ||
1705 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1706 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1707 "from our AP - ignore it");
1708 return;
1709 }
1710
1711 switch (type) {
1712 case 1:
1713 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1714 break;
1715 default:
1716 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1717 "WNM-Notification type %u", type);
1718 break;
1719 }
1720}
1721
1722
d514b502
JM		 1723static void ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant *wpa_s,
1724 const u8 *sa, const u8 *frm,
1725 int len)
1726{
1727 u8 dialog_token, req_info, auto_report, timeout;
1728
1729 if (!wpa_s->conf->coloc_intf_reporting)
1730 return;
1731
1732 /* Dialog Token [1] | Request Info [1] */
1733
1734 if (len < 2)
1735 return;
1736 dialog_token = frm[0];
1737 req_info = frm[1];
1738 auto_report = req_info & 0x03;
1739 timeout = req_info >> 2;
1740
1741 wpa_dbg(wpa_s, MSG_DEBUG,
1742 "WNM: Received Collocated Interference Request (dialog_token %u auto_report %u timeout %u sa " MACSTR ")",
1743 dialog_token, auto_report, timeout, MAC2STR(sa));
1744
1745 if (dialog_token == 0)
1746 return; /* only nonzero values are used for request */
1747
1748 if (wpa_s->wpa_state != WPA_COMPLETED ||
1749 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1750 wpa_dbg(wpa_s, MSG_DEBUG,
1751 "WNM: Collocated Interference Request frame not from current AP - ignore it");
1752 return;
1753 }
1754
1755 wpa_msg(wpa_s, MSG_INFO, COLOC_INTF_REQ "%u %u %u",
1756 dialog_token, auto_report, timeout);
1757 wpa_s->coloc_intf_dialog_token = dialog_token;
1758 wpa_s->coloc_intf_auto_report = auto_report;
1759 wpa_s->coloc_intf_timeout = timeout;
1760}
1761
1762
75cad1a0 1763void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
dbfb8e82 1764 const struct ieee80211_mgmt *mgmt, size_t len)
75cad1a0 1765{
27c77751 1766 const u8 *pos, *end;
2049a875 1767 u8 act;
27c77751 1768
dbfb8e82 1769 if (len < IEEE80211_HDRLEN + 2)
27c77751
JM		 1770 return;
1771
2703fb4a 1772 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
27c77751 1773 act = *pos++;
dbfb8e82 1774 end = ((const u8 *) mgmt) + len;
27c77751
JM		 1775
1776 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
dbfb8e82 1777 act, MAC2STR(mgmt->sa));
2049a875 1778 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
dbfb8e82 1779 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
2049a875
JM		 1780 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1781 "frame");
1782 return;
1783 }
75cad1a0
XC		 1784
1785 switch (act) {
27c77751 1786 case WNM_BSS_TRANS_MGMT_REQ:
2049a875 1787 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
dbfb8e82 1788 !(mgmt->da[0] & 0x01));
27c77751 1789 break;
75cad1a0 1790 case WNM_SLEEP_MODE_RESP:
dbfb8e82 1791 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
75cad1a0 1792 break;
95a3ea94
JM		 1793 case WNM_NOTIFICATION_REQ:
1794 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1795 break;
d514b502
JM		 1796 case WNM_COLLOCATED_INTERFERENCE_REQ:
1797 ieee802_11_rx_wnm_coloc_intf_req(wpa_s, mgmt->sa, pos,
1798 end - pos);
1799 break;
75cad1a0 1800 default:
e27d20bb 1801 wpa_printf(MSG_ERROR, "WNM: Unknown request");
75cad1a0
XC		 1802 break;
1803 }
1804}
d514b502
JM		 1805
1806
1807int wnm_send_coloc_intf_report(struct wpa_supplicant *wpa_s, u8 dialog_token,
1808 const struct wpabuf *elems)
1809{
1810 struct wpabuf *buf;
1811 int ret;
1812
1813 if (wpa_s->wpa_state < WPA_ASSOCIATED || !elems)
1814 return -1;
1815
1816 wpa_printf(MSG_DEBUG, "WNM: Send Collocated Interference Report to "
1817 MACSTR " (dialog token %u)",
1818 MAC2STR(wpa_s->bssid), dialog_token);
1819
1820 buf = wpabuf_alloc(3 + wpabuf_len(elems));
1821 if (!buf)
1822 return -1;
1823
1824 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1825 wpabuf_put_u8(buf, WNM_COLLOCATED_INTERFERENCE_REPORT);
1826 wpabuf_put_u8(buf, dialog_token);
1827 wpabuf_put_buf(buf, elems);
1828
1829 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1830 wpa_s->own_addr, wpa_s->bssid,
1831 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1832 wpabuf_free(buf);
1833 return ret;
1834}
1835
1836
1837void wnm_set_coloc_intf_elems(struct wpa_supplicant *wpa_s,
1838 struct wpabuf *elems)
1839{
1840 wpabuf_free(wpa_s->coloc_intf_elems);
1841 if (elems && wpabuf_len(elems) == 0) {
1842 wpabuf_free(elems);
1843 elems = NULL;
1844 }
1845 wpa_s->coloc_intf_elems = elems;
1846
1847 if (wpa_s->conf->coloc_intf_reporting && wpa_s->coloc_intf_elems &&
1848 wpa_s->coloc_intf_dialog_token &&
1849 (wpa_s->coloc_intf_auto_report == 1 ||
1850 wpa_s->coloc_intf_auto_report == 3)) {
1851 /* TODO: Check that there has not been less than
1852 * wpa_s->coloc_intf_timeout * 200 TU from the last report.
1853 */
1854 wnm_send_coloc_intf_report(wpa_s,
1855 wpa_s->coloc_intf_dialog_token,
1856 wpa_s->coloc_intf_elems);
1857 }
1858}
1859
1860
1861void wnm_clear_coloc_intf_reporting(struct wpa_supplicant *wpa_s)
1862{
1863#ifdef CONFIG_WNM
1864 wpa_s->coloc_intf_dialog_token = 0;
1865 wpa_s->coloc_intf_auto_report = 0;
1866#endif /* CONFIG_WNM */
1867}
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