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tests: sigma_dut controlled STA and beacon protection
[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"
fa979812 15#include "common/ocv.h"
75cad1a0 16#include "rsn_supp/wpa.h"
af8bc24d 17#include "config.h"
61c54976
JM		 18#include "wpa_supplicant_i.h"
19#include "driver_i.h"
2049a875 20#include "scan.h"
e27d20bb
VK		 21#include "ctrl_iface.h"
22#include "bss.h"
23#include "wnm_sta.h"
80d06d0c 24#include "notify.h"
95a3ea94 25#include "hs20_supplicant.h"
75cad1a0
XC		 26
27#define MAX_TFS_IE_LEN 1024
e27d20bb 28#define WNM_MAX_NEIGHBOR_REPORT 10
75cad1a0 29
2f195639 30#define WNM_SCAN_RESULT_AGE 2 /* 2 seconds */
75cad1a0
XC		 31
32/* get the TFS IE from driver */
33static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
34 u16 *buf_len, enum wnm_oper oper)
35{
36 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
37
38 return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
39}
40
41
42/* set the TFS IE to driver */
43static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
dacd789f 44 const u8 *addr, const u8 *buf, u16 buf_len,
75cad1a0
XC		 45 enum wnm_oper oper)
46{
dacd789f
JM		 47 u16 len = buf_len;
48
75cad1a0
XC		 49 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
50
dacd789f 51 return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
75cad1a0
XC		 52}
53
54
55/* MLME-SLEEPMODE.request */
56int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
cd0ef657 57 u8 action, u16 intval, struct wpabuf *tfs_req)
75cad1a0
XC		 58{
59 struct ieee80211_mgmt *mgmt;
60 int res;
61 size_t len;
62 struct wnm_sleep_element *wnmsleep_ie;
fa979812
MV		 63 u8 *wnmtfs_ie, *oci_ie;
64 u8 wnmsleep_ie_len, oci_ie_len;
75cad1a0
XC		 65 u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
66 enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
67 WNM_SLEEP_TFS_REQ_IE_NONE;
68
cd0ef657
JM		 69 wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
70 "action=%s to " MACSTR,
71 action == 0 ? "enter" : "exit",
72 MAC2STR(wpa_s->bssid));
73
75cad1a0
XC		 74 /* WNM-Sleep Mode IE */
75 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
76 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
77 if (wnmsleep_ie == NULL)
78 return -1;
79 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
80 wnmsleep_ie->len = wnmsleep_ie_len - 2;
81 wnmsleep_ie->action_type = action;
82 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
e9199e31 83 wnmsleep_ie->intval = host_to_le16(intval);
cd0ef657
JM		 84 wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
85 (u8 *) wnmsleep_ie, wnmsleep_ie_len);
75cad1a0
XC		 86
87 /* TFS IE(s) */
cd0ef657
JM		 88 if (tfs_req) {
89 wnmtfs_ie_len = wpabuf_len(tfs_req);
a1f11e34 90 wnmtfs_ie = os_memdup(wpabuf_head(tfs_req), wnmtfs_ie_len);
cd0ef657
JM		 91 if (wnmtfs_ie == NULL) {
92 os_free(wnmsleep_ie);
93 return -1;
94 }
cd0ef657
JM		 95 } else {
96 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
97 if (wnmtfs_ie == NULL) {
98 os_free(wnmsleep_ie);
99 return -1;
100 }
101 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
102 tfs_oper)) {
103 wnmtfs_ie_len = 0;
104 os_free(wnmtfs_ie);
105 wnmtfs_ie = NULL;
106 }
75cad1a0 107 }
cd0ef657
JM		 108 wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
109 (u8 *) wnmtfs_ie, wnmtfs_ie_len);
75cad1a0 110
fa979812
MV		 111 oci_ie = NULL;
112 oci_ie_len = 0;
113#ifdef CONFIG_OCV
114 if (action == WNM_SLEEP_MODE_EXIT && wpa_sm_ocv_enabled(wpa_s->wpa)) {
115 struct wpa_channel_info ci;
116
117 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
118 wpa_printf(MSG_WARNING,
119 "Failed to get channel info for OCI element in WNM-Sleep Mode frame");
120 os_free(wnmsleep_ie);
121 os_free(wnmtfs_ie);
122 return -1;
123 }
124
125 oci_ie_len = OCV_OCI_EXTENDED_LEN;
126 oci_ie = os_zalloc(oci_ie_len);
127 if (!oci_ie) {
128 wpa_printf(MSG_WARNING,
129 "Failed to allocate buffer for for OCI element in WNM-Sleep Mode frame");
130 os_free(wnmsleep_ie);
131 os_free(wnmtfs_ie);
132 return -1;
133 }
134
135 if (ocv_insert_extended_oci(&ci, oci_ie) < 0) {
136 os_free(wnmsleep_ie);
137 os_free(wnmtfs_ie);
138 os_free(oci_ie);
139 return -1;
140 }
141 }
142#endif /* CONFIG_OCV */
143
144 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len +
145 oci_ie_len);
75cad1a0
XC		 146 if (mgmt == NULL) {
147 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
148 "WNM-Sleep Request action frame");
14df897c
JM		 149 os_free(wnmsleep_ie);
150 os_free(wnmtfs_ie);
75cad1a0
XC		 151 return -1;
152 }
153
154 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
155 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
156 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
157 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
158 WLAN_FC_STYPE_ACTION);
159 mgmt->u.action.category = WLAN_ACTION_WNM;
160 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
e0c54a15 161 mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
75cad1a0
XC		 162 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
163 wnmsleep_ie_len);
164 /* copy TFS IE here */
165 if (wnmtfs_ie_len > 0) {
166 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
167 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
168 }
169
fa979812
MV		 170#ifdef CONFIG_OCV
171 /* copy OCV OCI here */
172 if (oci_ie_len > 0) {
173 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
174 wnmsleep_ie_len + wnmtfs_ie_len, oci_ie, oci_ie_len);
175 }
176#endif /* CONFIG_OCV */
177
75cad1a0 178 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
fa979812 179 wnmtfs_ie_len + oci_ie_len;
75cad1a0
XC		 180
181 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
182 wpa_s->own_addr, wpa_s->bssid,
183 &mgmt->u.action.category, len, 0);
184 if (res < 0)
185 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
186 "(action=%d, intval=%d)", action, intval);
03ed0a52
JM		 187 else
188 wpa_s->wnmsleep_used = 1;
75cad1a0
XC		 189
190 os_free(wnmsleep_ie);
191 os_free(wnmtfs_ie);
fa979812 192 os_free(oci_ie);
75cad1a0
XC		 193 os_free(mgmt);
194
195 return res;
196}
197
198
74b4a360 199static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
dacd789f
JM		 200 const u8 *tfsresp_ie_start,
201 const u8 *tfsresp_ie_end)
74b4a360
JM		 202{
203 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
204 wpa_s->bssid, NULL, NULL);
205 /* remove GTK/IGTK ?? */
206
207 /* set the TFS Resp IE(s) */
208 if (tfsresp_ie_start && tfsresp_ie_end &&
209 tfsresp_ie_end - tfsresp_ie_start >= 0) {
210 u16 tfsresp_ie_len;
211 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
212 tfsresp_ie_start;
213 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
214 /* pass the TFS Resp IE(s) to driver for processing */
215 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
216 tfsresp_ie_start,
dacd789f 217 tfsresp_ie_len,
74b4a360
JM		 218 WNM_SLEEP_TFS_RESP_IE_SET))
219 wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
220 }
221}
222
223
224static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
225 const u8 *frm, u16 key_len_total)
226{
227 u8 *ptr, *end;
228 u8 gtk_len;
229
230 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
231 NULL, NULL);
232
233 /* Install GTK/IGTK */
234
235 /* point to key data field */
dbfb8e82 236 ptr = (u8 *) frm + 1 + 2;
74b4a360
JM		 237 end = ptr + key_len_total;
238 wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
239
2cb28a4c
JM		 240 if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
241 wpa_msg(wpa_s, MSG_INFO,
242 "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
243 return;
244 }
245
bdce45b8
JM		 246 while (end - ptr > 1) {
247 if (2 + ptr[1] > end - ptr) {
74b4a360
JM		 248 wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
249 "length");
250 if (end > ptr) {
251 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
252 ptr, end - ptr);
253 }
254 break;
255 }
256 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
257 if (ptr[1] < 11 + 5) {
258 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
259 "subelem");
260 break;
261 }
262 gtk_len = *(ptr + 4);
263 if (ptr[1] < 11 + gtk_len ||
264 gtk_len < 5 || gtk_len > 32) {
265 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
266 "subelem");
267 break;
268 }
269 wpa_wnmsleep_install_key(
270 wpa_s->wpa,
271 WNM_SLEEP_SUBELEM_GTK,
272 ptr);
273 ptr += 13 + gtk_len;
74b4a360
JM		 274 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
275 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
276 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
277 "subelem");
278 break;
279 }
280 wpa_wnmsleep_install_key(wpa_s->wpa,
281 WNM_SLEEP_SUBELEM_IGTK, ptr);
282 ptr += 10 + WPA_IGTK_LEN;
2d4c78ae
JM		 283 } else if (*ptr == WNM_SLEEP_SUBELEM_BIGTK) {
284 if (ptr[1] < 2 + 6 + WPA_BIGTK_LEN) {
285 wpa_printf(MSG_DEBUG,
286 "WNM: Too short BIGTK subelem");
287 break;
288 }
289 wpa_wnmsleep_install_key(wpa_s->wpa,
290 WNM_SLEEP_SUBELEM_BIGTK, ptr);
291 ptr += 10 + WPA_BIGTK_LEN;
74b4a360
JM		 292 } else
293 break; /* skip the loop */
294 }
295}
296
297
75cad1a0
XC		 298static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
299 const u8 *frm, int len)
300{
301 /*
9a147ba1 302 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
75cad1a0
XC		 303 * WNM-Sleep Mode IE | TFS Response IE
304 */
dacd789f 305 const u8 *pos = frm; /* point to payload after the action field */
9a147ba1 306 u16 key_len_total;
75cad1a0
XC		 307 struct wnm_sleep_element *wnmsleep_ie = NULL;
308 /* multiple TFS Resp IE (assuming consecutive) */
dacd789f
JM		 309 const u8 *tfsresp_ie_start = NULL;
310 const u8 *tfsresp_ie_end = NULL;
fa979812
MV		 311#ifdef CONFIG_OCV
312 const u8 *oci_ie = NULL;
313 u8 oci_ie_len = 0;
314#endif /* CONFIG_OCV */
fecc09ed 315 size_t left;
75cad1a0 316
03ed0a52
JM		 317 if (!wpa_s->wnmsleep_used) {
318 wpa_printf(MSG_DEBUG,
adae51f8 319 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode operation has not been requested");
03ed0a52
JM		 320 return;
321 }
322
9a147ba1
JM		 323 if (len < 3)
324 return;
325 key_len_total = WPA_GET_LE16(frm + 1);
326
dbfb8e82
JM		 327 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
328 frm[0], key_len_total);
fecc09ed
JM		 329 left = len - 3;
330 if (key_len_total > left) {
68db9ab0
JM		 331 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
332 return;
333 }
fecc09ed 334 pos += 3 + key_len_total;
bdce45b8 335 while (pos - frm + 1 < len) {
75cad1a0 336 u8 ie_len = *(pos + 1);
bdce45b8 337 if (2 + ie_len > frm + len - pos) {
68db9ab0
JM		 338 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
339 break;
340 }
341 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
8acbe7f2 342 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
75cad1a0
XC		 343 wnmsleep_ie = (struct wnm_sleep_element *) pos;
344 else if (*pos == WLAN_EID_TFS_RESP) {
345 if (!tfsresp_ie_start)
346 tfsresp_ie_start = pos;
347 tfsresp_ie_end = pos;
fa979812
MV		 348#ifdef CONFIG_OCV
349 } else if (*pos == WLAN_EID_EXTENSION && ie_len >= 1 &&
350 pos[2] == WLAN_EID_EXT_OCV_OCI) {
351 oci_ie = pos + 3;
352 oci_ie_len = ie_len - 1;
353#endif /* CONFIG_OCV */
75cad1a0
XC		 354 } else
355 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
356 pos += ie_len + 2;
357 }
358
359 if (!wnmsleep_ie) {
360 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
361 return;
362 }
363
fa979812
MV		 364#ifdef CONFIG_OCV
365 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT &&
366 wpa_sm_ocv_enabled(wpa_s->wpa)) {
367 struct wpa_channel_info ci;
368
369 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
370 wpa_msg(wpa_s, MSG_WARNING,
371 "Failed to get channel info to validate received OCI in WNM-Sleep Mode frame");
372 return;
373 }
374
375 if (ocv_verify_tx_params(oci_ie, oci_ie_len, &ci,
376 channel_width_to_int(ci.chanwidth),
377 ci.seg1_idx) != 0) {
378 wpa_msg(wpa_s, MSG_WARNING, "WNM: %s", ocv_errorstr);
379 return;
380 }
381 }
382#endif /* CONFIG_OCV */
383
adae51f8
JM		 384 wpa_s->wnmsleep_used = 0;
385
62f6fbb4
JM		 386 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
387 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
75cad1a0
XC		 388 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
389 "frame (action=%d, intval=%d)",
390 wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc 391 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
74b4a360
JM		 392 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
393 tfsresp_ie_end);
df80a0cc 394 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
74b4a360 395 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
75cad1a0
XC		 396 }
397 } else {
398 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
399 "(action=%d, intval=%d)",
400 wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc 401 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
75cad1a0
XC		 402 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
403 wpa_s->bssid, NULL, NULL);
df80a0cc 404 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
75cad1a0
XC		 405 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
406 wpa_s->bssid, NULL, NULL);
407 }
408}
409
410
e27d20bb
VK		 411void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
412{
413 int i;
414
415 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
e27d20bb 416 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
e27d20bb
VK		 417 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
418 }
419
ec331d09 420 wpa_s->wnm_num_neighbor_report = 0;
e27d20bb
VK		 421 os_free(wpa_s->wnm_neighbor_report_elements);
422 wpa_s->wnm_neighbor_report_elements = NULL;
d514b502
JM		 423
424 wpabuf_free(wpa_s->coloc_intf_elems);
425 wpa_s->coloc_intf_elems = NULL;
e27d20bb
VK		 426}
427
428
429static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
430 u8 id, u8 elen, const u8 *pos)
431{
432 switch (id) {
433 case WNM_NEIGHBOR_TSF:
434 if (elen < 2 + 2) {
435 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
436 break;
437 }
09322678
JM		 438 rep->tsf_offset = WPA_GET_LE16(pos);
439 rep->beacon_int = WPA_GET_LE16(pos + 2);
440 rep->tsf_present = 1;
e27d20bb
VK		 441 break;
442 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
443 if (elen < 2) {
444 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
445 "country string");
446 break;
447 }
09322678
JM		 448 os_memcpy(rep->country, pos, 2);
449 rep->country_present = 1;
e27d20bb
VK		 450 break;
451 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
452 if (elen < 1) {
453 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
454 "candidate");
455 break;
456 }
09322678
JM		 457 rep->preference = pos[0];
458 rep->preference_present = 1;
e27d20bb
VK		 459 break;
460 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
e8ebef87
JM		 461 if (elen < 10) {
462 wpa_printf(MSG_DEBUG,
463 "WNM: Too short BSS termination duration");
464 break;
465 }
09322678
JM		 466 rep->bss_term_tsf = WPA_GET_LE64(pos);
467 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
468 rep->bss_term_present = 1;
e27d20bb
VK		 469 break;
470 case WNM_NEIGHBOR_BEARING:
471 if (elen < 8) {
472 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
473 "bearing");
474 break;
475 }
09322678
JM		 476 rep->bearing = WPA_GET_LE16(pos);
477 rep->distance = WPA_GET_LE32(pos + 2);
478 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
479 rep->bearing_present = 1;
e27d20bb
VK		 480 break;
481 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
f6ce70dc 482 if (elen < 1) {
e27d20bb
VK		 483 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
484 "pilot");
485 break;
486 }
e9cb7b92 487 os_free(rep->meas_pilot);
e27d20bb
VK		 488 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
489 if (rep->meas_pilot == NULL)
490 break;
e27d20bb 491 rep->meas_pilot->measurement_pilot = pos[0];
f6ce70dc
JM		 492 rep->meas_pilot->subelem_len = elen - 1;
493 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
e27d20bb
VK		 494 break;
495 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
f6ce70dc 496 if (elen < 5) {
e27d20bb
VK		 497 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
498 "capabilities");
499 break;
500 }
09322678
JM		 501 os_memcpy(rep->rm_capab, pos, 5);
502 rep->rm_capab_present = 1;
e27d20bb
VK		 503 break;
504 case WNM_NEIGHBOR_MULTIPLE_BSSID:
f6ce70dc 505 if (elen < 1) {
e27d20bb
VK		 506 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
507 break;
508 }
e9cb7b92 509 os_free(rep->mul_bssid);
e27d20bb
VK		 510 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
511 if (rep->mul_bssid == NULL)
512 break;
e27d20bb 513 rep->mul_bssid->max_bssid_indicator = pos[0];
f6ce70dc
JM		 514 rep->mul_bssid->subelem_len = elen - 1;
515 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
e27d20bb
VK		 516 break;
517 }
518}
519
520
e1117c1c
JM		 521static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
522{
158211b2
JM		 523 struct wpa_bss *bss = wpa_s->current_bss;
524 const char *country = NULL;
80ce804e 525 int freq;
158211b2
JM		 526
527 if (bss) {
528 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
529
530 if (elem && elem[1] >= 2)
531 country = (const char *) (elem + 2);
532 }
533
80ce804e
JM		 534 freq = ieee80211_chan_to_freq(country, op_class, chan);
535 if (freq <= 0 && op_class == 0) {
536 /*
537 * Some APs do not advertise correct operating class
538 * information. Try to determine the most likely operating
539 * frequency based on the channel number.
540 */
541 if (chan >= 1 && chan <= 13)
542 freq = 2407 + chan * 5;
543 else if (chan == 14)
544 freq = 2484;
545 else if (chan >= 36 && chan <= 169)
546 freq = 5000 + chan * 5;
547 }
548 return freq;
e1117c1c
JM		 549}
550
551
e27d20bb
VK		 552static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
553 const u8 *pos, u8 len,
554 struct neighbor_report *rep)
555{
556 u8 left = len;
557
558 if (left < 13) {
559 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
560 return;
561 }
562
563 os_memcpy(rep->bssid, pos, ETH_ALEN);
4c381f0d 564 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
e27d20bb
VK		 565 rep->regulatory_class = *(pos + 10);
566 rep->channel_number = *(pos + 11);
567 rep->phy_type = *(pos + 12);
568
569 pos += 13;
570 left -= 13;
571
572 while (left >= 2) {
573 u8 id, elen;
574
575 id = *pos++;
576 elen = *pos++;
1aa6f953
JM		 577 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
578 left -= 2;
579 if (elen > left) {
580 wpa_printf(MSG_DEBUG,
581 "WNM: Truncated neighbor report subelement");
582 break;
583 }
e27d20bb 584 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
1aa6f953 585 left -= elen;
e27d20bb
VK		 586 pos += elen;
587 }
e1117c1c
JM		 588
589 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
590 rep->channel_number);
e27d20bb
VK		 591}
592
593
af8bc24d
KV		 594static void wnm_clear_acceptable(struct wpa_supplicant *wpa_s)
595{
596 unsigned int i;
597
598 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++)
599 wpa_s->wnm_neighbor_report_elements[i].acceptable = 0;
600}
601
602
603static struct wpa_bss * get_first_acceptable(struct wpa_supplicant *wpa_s)
604{
605 unsigned int i;
606 struct neighbor_report *nei;
607
608 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
609 nei = &wpa_s->wnm_neighbor_report_elements[i];
610 if (nei->acceptable)
611 return wpa_bss_get_bssid(wpa_s, nei->bssid);
612 }
613
614 return NULL;
615}
616
617
618#ifdef CONFIG_MBO
d0b9ab69 619static struct wpa_bss *
af8bc24d
KV		 620get_mbo_transition_candidate(struct wpa_supplicant *wpa_s,
621 enum mbo_transition_reject_reason *reason)
e27d20bb 622{
af8bc24d
KV		 623 struct wpa_bss *target = NULL;
624 struct wpa_bss_trans_info params;
625 struct wpa_bss_candidate_info *info = NULL;
626 struct neighbor_report *nei = wpa_s->wnm_neighbor_report_elements;
627 u8 *first_candidate_bssid = NULL, *pos;
628 unsigned int i;
629
630 params.mbo_transition_reason = wpa_s->wnm_mbo_transition_reason;
631 params.n_candidates = 0;
632 params.bssid = os_calloc(wpa_s->wnm_num_neighbor_report, ETH_ALEN);
633 if (!params.bssid)
634 return NULL;
635
636 pos = params.bssid;
637 for (i = 0; i < wpa_s->wnm_num_neighbor_report; nei++, i++) {
638 if (nei->is_first)
639 first_candidate_bssid = nei->bssid;
640 if (!nei->acceptable)
641 continue;
642 os_memcpy(pos, nei->bssid, ETH_ALEN);
643 pos += ETH_ALEN;
644 params.n_candidates++;
645 }
646
647 if (!params.n_candidates)
648 goto end;
649
650 info = wpa_drv_get_bss_trans_status(wpa_s, &params);
651 if (!info) {
652 /* If failed to get candidate BSS transition status from driver,
653 * get the first acceptable candidate from wpa_supplicant.
654 */
655 target = wpa_bss_get_bssid(wpa_s, params.bssid);
656 goto end;
657 }
658
659 /* Get the first acceptable candidate from driver */
660 for (i = 0; i < info->num; i++) {
661 if (info->candidates[i].is_accept) {
662 target = wpa_bss_get_bssid(wpa_s,
663 info->candidates[i].bssid);
664 goto end;
665 }
666 }
667
668 /* If Disassociation Imminent is set and driver rejects all the
669 * candidate select first acceptable candidate which has
670 * rssi > disassoc_imminent_rssi_threshold
671 */
672 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
673 for (i = 0; i < info->num; i++) {
674 target = wpa_bss_get_bssid(wpa_s,
675 info->candidates[i].bssid);
f2a04874
PRP		 676 if (target &&
677 (target->level <
678 wpa_s->conf->disassoc_imminent_rssi_threshold))
af8bc24d
KV		 679 continue;
680 goto end;
681 }
682 }
683
684 /* While sending BTM reject use reason code of the first candidate
685 * received in BTM request frame
686 */
687 if (reason) {
688 for (i = 0; i < info->num; i++) {
689 if (first_candidate_bssid &&
690 os_memcmp(first_candidate_bssid,
691 info->candidates[i].bssid, ETH_ALEN) == 0)
692 {
693 *reason = info->candidates[i].reject_reason;
694 break;
695 }
696 }
697 }
698
699 target = NULL;
e27d20bb 700
af8bc24d
KV		 701end:
702 os_free(params.bssid);
703 if (info) {
704 os_free(info->candidates);
705 os_free(info);
706 }
707 return target;
708}
709#endif /* CONFIG_MBO */
710
711
712static struct wpa_bss *
713compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs,
714 enum mbo_transition_reject_reason *reason)
715{
d0b9ab69 716 u8 i;
027454d2 717 struct wpa_bss *bss = wpa_s->current_bss;
d0b9ab69 718 struct wpa_bss *target;
e27d20bb 719
d0b9ab69 720 if (!bss)
9e080bf3 721 return NULL;
e27d20bb 722
3c1060ff 723 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
027454d2 724 MAC2STR(wpa_s->bssid), bss->level);
3c1060ff 725
af8bc24d
KV		 726 wnm_clear_acceptable(wpa_s);
727
d0b9ab69
JM		 728 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
729 struct neighbor_report *nei;
027454d2 730
d0b9ab69 731 nei = &wpa_s->wnm_neighbor_report_elements[i];
027454d2
JM		 732 if (nei->preference_present && nei->preference == 0) {
733 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
734 MAC2STR(nei->bssid));
735 continue;
736 }
737
d0b9ab69
JM		 738 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
739 if (!target) {
027454d2
JM		 740 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
741 " (pref %d) not found in scan results",
742 MAC2STR(nei->bssid),
743 nei->preference_present ? nei->preference :
744 -1);
745 continue;
746 }
747
2f195639
KV		 748 if (age_secs) {
749 struct os_reltime now;
750
751 if (os_get_reltime(&now) == 0 &&
752 os_reltime_expired(&now, &target->last_update,
753 age_secs)) {
754 wpa_printf(MSG_DEBUG,
755 "Candidate BSS is more than %ld seconds old",
756 age_secs);
757 continue;
758 }
759 }
760
d0b9ab69
JM		 761 if (bss->ssid_len != target->ssid_len ||
762 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
027454d2
JM		 763 /*
764 * TODO: Could consider allowing transition to another
765 * ESS if PMF was enabled for the association.
766 */
767 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
768 " (pref %d) in different ESS",
769 MAC2STR(nei->bssid),
770 nei->preference_present ? nei->preference :
771 -1);
772 continue;
773 }
774
cbc3d6fe
JM		 775 if (wpa_s->current_ssid &&
776 !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
e65a87b3 777 1, 0)) {
cbc3d6fe
JM		 778 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
779 " (pref %d) does not match the current network profile",
780 MAC2STR(nei->bssid),
781 nei->preference_present ? nei->preference :
782 -1);
783 continue;
784 }
785
19677b77 786 if (wpa_is_bss_tmp_disallowed(wpa_s, target)) {
dd599908
AS		 787 wpa_printf(MSG_DEBUG,
788 "MBO: Candidate BSS " MACSTR
789 " retry delay is not over yet",
790 MAC2STR(nei->bssid));
791 continue;
792 }
793
d0b9ab69 794 if (target->level < bss->level && target->level < -80) {
027454d2
JM		 795 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
796 " (pref %d) does not have sufficient signal level (%d)",
797 MAC2STR(nei->bssid),
798 nei->preference_present ? nei->preference :
799 -1,
d0b9ab69 800 target->level);
027454d2
JM		 801 continue;
802 }
803
af8bc24d
KV		 804 nei->acceptable = 1;
805 }
806
807#ifdef CONFIG_MBO
808 if (wpa_s->wnm_mbo_trans_reason_present)
809 target = get_mbo_transition_candidate(wpa_s, reason);
810 else
811 target = get_first_acceptable(wpa_s);
812#else /* CONFIG_MBO */
813 target = get_first_acceptable(wpa_s);
814#endif /* CONFIG_MBO */
815
816 if (target) {
027454d2 817 wpa_printf(MSG_DEBUG,
d0b9ab69 818 "WNM: Found an acceptable preferred transition candidate BSS "
027454d2 819 MACSTR " (RSSI %d)",
af8bc24d 820 MAC2STR(target->bssid), target->level);
e27d20bb
VK		 821 }
822
af8bc24d 823 return target;
e27d20bb
VK		 824}
825
826
84d1c0fd
AS		 827static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
828{
829 const u8 *ie_a, *ie_b;
830
831 if (!a || !b)
832 return 0;
833
834 ie_a = wpa_bss_get_ie(a, eid);
835 ie_b = wpa_bss_get_ie(b, eid);
836
837 if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
838 return 0;
839
840 return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
841}
842
843
844static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
845{
846 u32 info = 0;
847
848 info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
849
850 /*
851 * Leave the security and key scope bits unset to indicate that the
852 * security information is not available.
853 */
854
855 if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
856 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
857 if (bss->caps & WLAN_CAPABILITY_QOS)
858 info |= NEI_REP_BSSID_INFO_QOS;
859 if (bss->caps & WLAN_CAPABILITY_APSD)
860 info |= NEI_REP_BSSID_INFO_APSD;
861 if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
862 info |= NEI_REP_BSSID_INFO_RM;
863 if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
864 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
865 if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
866 info |= NEI_REP_BSSID_INFO_IMM_BA;
867 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
868 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
869 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
870 info |= NEI_REP_BSSID_INFO_HT;
871
872 return info;
873}
874
875
13bf18ed
AS		 876static int wnm_add_nei_rep(struct wpabuf **buf, const u8 *bssid,
877 u32 bss_info, u8 op_class, u8 chan, u8 phy_type,
878 u8 pref)
84d1c0fd 879{
13bf18ed
AS		 880 if (wpabuf_len(*buf) + 18 >
881 IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN) {
882 wpa_printf(MSG_DEBUG,
883 "WNM: No room in frame for Neighbor Report element");
884 return -1;
885 }
84d1c0fd 886
13bf18ed 887 if (wpabuf_resize(buf, 18) < 0) {
84d1c0fd 888 wpa_printf(MSG_DEBUG,
13bf18ed 889 "WNM: Failed to allocate memory for Neighbor Report element");
84d1c0fd
AS		 890 return -1;
891 }
892
13bf18ed 893 wpabuf_put_u8(*buf, WLAN_EID_NEIGHBOR_REPORT);
84d1c0fd 894 /* length: 13 for basic neighbor report + 3 for preference subelement */
13bf18ed
AS		 895 wpabuf_put_u8(*buf, 16);
896 wpabuf_put_data(*buf, bssid, ETH_ALEN);
897 wpabuf_put_le32(*buf, bss_info);
898 wpabuf_put_u8(*buf, op_class);
899 wpabuf_put_u8(*buf, chan);
900 wpabuf_put_u8(*buf, phy_type);
901 wpabuf_put_u8(*buf, WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE);
902 wpabuf_put_u8(*buf, 1);
903 wpabuf_put_u8(*buf, pref);
904 return 0;
84d1c0fd
AS		 905}
906
907
908static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
13bf18ed 909 struct wpa_bss *bss, struct wpabuf **buf,
84d1c0fd
AS		 910 u8 pref)
911{
912 const u8 *ie;
913 u8 op_class, chan;
914 int sec_chan = 0, vht = 0;
915 enum phy_type phy_type;
916 u32 info;
917 struct ieee80211_ht_operation *ht_oper = NULL;
918 struct ieee80211_vht_operation *vht_oper = NULL;
919
920 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
921 if (ie && ie[1] >= 2) {
922 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
923
924 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
925 sec_chan = 1;
926 else if (ht_oper->ht_param &
927 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
928 sec_chan = -1;
929 }
930
931 ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
932 if (ie && ie[1] >= 1) {
933 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
934
464dcfd0
JC		 935 if (vht_oper->vht_op_info_chwidth == CHANWIDTH_80MHZ ||
936 vht_oper->vht_op_info_chwidth == CHANWIDTH_160MHZ ||
937 vht_oper->vht_op_info_chwidth == CHANWIDTH_80P80MHZ)
84d1c0fd
AS		 938 vht = vht_oper->vht_op_info_chwidth;
939 }
940
941 if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
942 &chan) == NUM_HOSTAPD_MODES) {
943 wpa_printf(MSG_DEBUG,
944 "WNM: Cannot determine operating class and channel");
945 return -2;
946 }
947
948 phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
949 (vht_oper != NULL));
950 if (phy_type == PHY_TYPE_UNSPECIFIED) {
951 wpa_printf(MSG_DEBUG,
952 "WNM: Cannot determine BSS phy type for Neighbor Report");
953 return -2;
954 }
955
956 info = wnm_get_bss_info(wpa_s, bss);
957
13bf18ed
AS		 958 return wnm_add_nei_rep(buf, bss->bssid, info, op_class, chan, phy_type,
959 pref);
84d1c0fd
AS		 960}
961
962
13bf18ed 963static void wnm_add_cand_list(struct wpa_supplicant *wpa_s, struct wpabuf **buf)
84d1c0fd 964{
84d1c0fd
AS		 965 unsigned int i, pref = 255;
966 struct os_reltime now;
967 struct wpa_ssid *ssid = wpa_s->current_ssid;
968
969 if (!ssid)
13bf18ed 970 return;
84d1c0fd
AS		 971
972 /*
973 * TODO: Define when scan results are no longer valid for the candidate
974 * list.
975 */
976 os_get_reltime(&now);
977 if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
13bf18ed 978 return;
84d1c0fd
AS		 979
980 wpa_printf(MSG_DEBUG,
981 "WNM: Add candidate list to BSS Transition Management Response frame");
982 for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
983 struct wpa_bss *bss = wpa_s->last_scan_res[i];
984 int res;
985
e65a87b3 986 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1, 0)) {
13bf18ed 987 res = wnm_nei_rep_add_bss(wpa_s, bss, buf, pref--);
84d1c0fd
AS		 988 if (res == -2)
989 continue; /* could not build entry for BSS */
990 if (res < 0)
991 break; /* no more room for candidates */
992 if (pref == 1)
993 break;
84d1c0fd
AS		 994 }
995 }
996
13bf18ed
AS		 997 wpa_hexdump_buf(MSG_DEBUG,
998 "WNM: BSS Transition Management Response candidate list",
999 *buf);
84d1c0fd
AS		 1000}
1001
1002
13bf18ed
AS		 1003#define BTM_RESP_MIN_SIZE 5 + ETH_ALEN
1004
7b53acd3
JM		 1005static void wnm_send_bss_transition_mgmt_resp(
1006 struct wpa_supplicant *wpa_s, u8 dialog_token,
af8bc24d
KV		 1007 enum bss_trans_mgmt_status_code status,
1008 enum mbo_transition_reject_reason reason,
1009 u8 delay, const u8 *target_bssid)
2049a875 1010{
13bf18ed 1011 struct wpabuf *buf;
f5f3728a 1012 int res;
2049a875 1013
af8bc24d
KV		 1014 wpa_printf(MSG_DEBUG,
1015 "WNM: Send BSS Transition Management Response to " MACSTR
1016 " dialog_token=%u status=%u reason=%u delay=%d",
1017 MAC2STR(wpa_s->bssid), dialog_token, status, reason, delay);
d0b9ab69
JM		 1018 if (!wpa_s->current_bss) {
1019 wpa_printf(MSG_DEBUG,
1020 "WNM: Current BSS not known - drop response");
1021 return;
1022 }
2049a875 1023
13bf18ed
AS		 1024 buf = wpabuf_alloc(BTM_RESP_MIN_SIZE);
1025 if (!buf) {
1026 wpa_printf(MSG_DEBUG,
1027 "WNM: Failed to allocate memory for BTM response");
1028 return;
1029 }
1030
80d06d0c
MW		 1031 wpa_s->bss_tm_status = status;
1032 wpas_notify_bss_tm_status(wpa_s);
1033
13bf18ed
AS		 1034 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1035 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_RESP);
1036 wpabuf_put_u8(buf, dialog_token);
1037 wpabuf_put_u8(buf, status);
1038 wpabuf_put_u8(buf, delay);
2049a875 1039 if (target_bssid) {
13bf18ed 1040 wpabuf_put_data(buf, target_bssid, ETH_ALEN);
2cd0f6a4
JM		 1041 } else if (status == WNM_BSS_TM_ACCEPT) {
1042 /*
1043 * P802.11-REVmc clarifies that the Target BSSID field is always
1044 * present when status code is zero, so use a fake value here if
1045 * no BSSID is yet known.
1046 */
13bf18ed 1047 wpabuf_put_data(buf, "\0\0\0\0\0\0", ETH_ALEN);
2049a875
JM		 1048 }
1049
84d1c0fd 1050 if (status == WNM_BSS_TM_ACCEPT)
13bf18ed 1051 wnm_add_cand_list(wpa_s, &buf);
84d1c0fd 1052
c8082d2b 1053#ifdef CONFIG_MBO
af8bc24d
KV		 1054 if (status != WNM_BSS_TM_ACCEPT &&
1055 wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) {
13bf18ed
AS		 1056 u8 mbo[10];
1057 size_t ret;
1058
1059 ret = wpas_mbo_ie_bss_trans_reject(wpa_s, mbo, sizeof(mbo),
1060 reason);
1061 if (ret) {
1062 if (wpabuf_resize(&buf, ret) < 0) {
1063 wpabuf_free(buf);
1064 wpa_printf(MSG_DEBUG,
1065 "WNM: Failed to allocate memory for MBO IE");
1066 return;
1067 }
1068
1069 wpabuf_put_data(buf, mbo, ret);
1070 }
c8082d2b
AS		 1071 }
1072#endif /* CONFIG_MBO */
1073
f5f3728a
JM		 1074 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1075 wpa_s->own_addr, wpa_s->bssid,
13bf18ed 1076 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
f5f3728a
JM		 1077 if (res < 0) {
1078 wpa_printf(MSG_DEBUG,
1079 "WNM: Failed to send BSS Transition Management Response");
1080 }
13bf18ed
AS		 1081
1082 wpabuf_free(buf);
2049a875
JM		 1083}
1084
1085
2f195639
KV		 1086static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
1087 struct wpa_bss *bss, struct wpa_ssid *ssid,
1088 int after_new_scan)
1089{
1090 wpa_dbg(wpa_s, MSG_DEBUG,
1091 "WNM: Transition to BSS " MACSTR
1092 " based on BSS Transition Management Request (old BSSID "
1093 MACSTR " after_new_scan=%d)",
1094 MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan);
1095
1096 /* Send the BSS Management Response - Accept */
1097 if (wpa_s->wnm_reply) {
1098 wpa_s->wnm_reply = 0;
1099 wpa_printf(MSG_DEBUG,
1100 "WNM: Sending successful BSS Transition Management Response");
af8bc24d
KV		 1101 wnm_send_bss_transition_mgmt_resp(
1102 wpa_s, wpa_s->wnm_dialog_token, WNM_BSS_TM_ACCEPT,
6a4363f5
VK		 1103 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1104 bss->bssid);
2f195639
KV		 1105 }
1106
1107 if (bss == wpa_s->current_bss) {
1108 wpa_printf(MSG_DEBUG,
1109 "WNM: Already associated with the preferred candidate");
1110 wnm_deallocate_memory(wpa_s);
1111 return;
1112 }
1113
1114 wpa_s->reassociate = 1;
1115 wpa_printf(MSG_DEBUG, "WNM: Issuing connect");
1116 wpa_supplicant_connect(wpa_s, bss, ssid);
1117 wnm_deallocate_memory(wpa_s);
1118}
1119
1120
75d65857 1121int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
e27d20bb 1122{
d0b9ab69
JM		 1123 struct wpa_bss *bss;
1124 struct wpa_ssid *ssid = wpa_s->current_ssid;
1125 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
af8bc24d
KV		 1126 enum mbo_transition_reject_reason reason =
1127 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED;
e27d20bb 1128
d0b9ab69
JM		 1129 if (!wpa_s->wnm_neighbor_report_elements)
1130 return 0;
1131
2f195639
KV		 1132 wpa_dbg(wpa_s, MSG_DEBUG,
1133 "WNM: Process scan results for BSS Transition Management");
d0b9ab69
JM		 1134 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
1135 &wpa_s->scan_trigger_time)) {
1136 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
1137 wnm_deallocate_memory(wpa_s);
1138 return 0;
1139 }
1140
1141 if (!wpa_s->current_bss ||
1142 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
1143 ETH_ALEN) != 0) {
1144 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
1145 return 0;
e27d20bb
VK		 1146 }
1147
1148 /* Compare the Neighbor Report and scan results */
af8bc24d 1149 bss = compare_scan_neighbor_results(wpa_s, 0, &reason);
d0b9ab69
JM		 1150 if (!bss) {
1151 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
1152 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
1153 goto send_bss_resp_fail;
1154 }
e27d20bb 1155
d0b9ab69 1156 /* Associate to the network */
2f195639 1157 wnm_bss_tm_connect(wpa_s, bss, ssid, 1);
d0b9ab69
JM		 1158 return 1;
1159
e27d20bb 1160send_bss_resp_fail:
75d65857
JM		 1161 if (!reply_on_fail)
1162 return 0;
1163
1164 /* Send reject response for all the failures */
1165
e27d20bb 1166 if (wpa_s->wnm_reply) {
d0b9ab69 1167 wpa_s->wnm_reply = 0;
e27d20bb
VK		 1168 wnm_send_bss_transition_mgmt_resp(wpa_s,
1169 wpa_s->wnm_dialog_token,
af8bc24d 1170 status, reason, 0, NULL);
e27d20bb 1171 }
d0b9ab69
JM		 1172 wnm_deallocate_memory(wpa_s);
1173
1174 return 0;
e27d20bb
VK		 1175}
1176
1177
ff2c5758
JM		 1178static int cand_pref_compar(const void *a, const void *b)
1179{
1180 const struct neighbor_report *aa = a;
1181 const struct neighbor_report *bb = b;
1182
1183 if (!aa->preference_present && !bb->preference_present)
1184 return 0;
1185 if (!aa->preference_present)
1186 return 1;
1187 if (!bb->preference_present)
1188 return -1;
1189 if (bb->preference > aa->preference)
1190 return 1;
1191 if (bb->preference < aa->preference)
1192 return -1;
1193 return 0;
1194}
1195
1196
1197static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
1198{
1199 if (!wpa_s->wnm_neighbor_report_elements)
1200 return;
1201 qsort(wpa_s->wnm_neighbor_report_elements,
1202 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
1203 cand_pref_compar);
1204}
1205
1206
8040dc53
JM		 1207static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
1208{
1209 unsigned int i;
1210
1211 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
1212 if (!wpa_s->wnm_neighbor_report_elements)
1213 return;
1214 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1215 struct neighbor_report *nei;
1216
1217 nei = &wpa_s->wnm_neighbor_report_elements[i];
1218 wpa_printf(MSG_DEBUG, "%u: " MACSTR
e1117c1c 1219 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
4c381f0d
JM		 1220 i, MAC2STR(nei->bssid), nei->bssid_info,
1221 nei->regulatory_class,
8040dc53 1222 nei->channel_number, nei->phy_type,
e1117c1c
JM		 1223 nei->preference_present ? nei->preference : -1,
1224 nei->freq);
1225 }
1226}
1227
1228
1229static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
1230{
1231 unsigned int i;
1232
1233 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1234 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
1235 int j;
1236
1237 for (j = 0; j < mode->num_channels; j++) {
1238 struct hostapd_channel_data *chan;
1239
1240 chan = &mode->channels[j];
1241 if (chan->freq == freq &&
1242 !(chan->flag & HOSTAPD_CHAN_DISABLED))
1243 return 1;
1244 }
1245 }
1246
1247 return 0;
1248}
1249
1250
1251static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
1252{
1253 int *freqs;
1254 int num_freqs = 0;
1255 unsigned int i;
1256
1257 if (!wpa_s->wnm_neighbor_report_elements)
1258 return;
1259
1260 if (wpa_s->hw.modes == NULL)
1261 return;
1262
1263 os_free(wpa_s->next_scan_freqs);
1264 wpa_s->next_scan_freqs = NULL;
1265
1266 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
1267 if (freqs == NULL)
1268 return;
1269
1270 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1271 struct neighbor_report *nei;
1272
1273 nei = &wpa_s->wnm_neighbor_report_elements[i];
1274 if (nei->freq <= 0) {
1275 wpa_printf(MSG_DEBUG,
1276 "WNM: Unknown neighbor operating frequency for "
1277 MACSTR " - scan all channels",
1278 MAC2STR(nei->bssid));
1279 os_free(freqs);
1280 return;
1281 }
1282 if (chan_supported(wpa_s, nei->freq))
1283 add_freq(freqs, &num_freqs, nei->freq);
8040dc53 1284 }
e1117c1c
JM		 1285
1286 if (num_freqs == 0) {
1287 os_free(freqs);
1288 return;
1289 }
1290
1291 wpa_printf(MSG_DEBUG,
1292 "WNM: Scan %d frequencies based on transition candidate list",
1293 num_freqs);
1294 wpa_s->next_scan_freqs = freqs;
8040dc53
JM		 1295}
1296
1297
2f195639
KV		 1298static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
1299{
1300 struct wpa_scan_results *scan_res;
1301 struct wpa_bss *bss;
1302 struct wpa_ssid *ssid = wpa_s->current_ssid;
1303 u8 i, found = 0;
1304 size_t j;
1305
1306 wpa_dbg(wpa_s, MSG_DEBUG,
1307 "WNM: Fetch current scan results from the driver for checking transition candidates");
1308 scan_res = wpa_drv_get_scan_results2(wpa_s);
1309 if (!scan_res) {
1310 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
1311 return 0;
1312 }
1313
1314 if (scan_res->fetch_time.sec == 0)
1315 os_get_reltime(&scan_res->fetch_time);
1316
1317 filter_scan_res(wpa_s, scan_res);
1318
1319 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1320 struct neighbor_report *nei;
1321
1322 nei = &wpa_s->wnm_neighbor_report_elements[i];
1323 if (nei->preference_present && nei->preference == 0)
1324 continue;
1325
1326 for (j = 0; j < scan_res->num; j++) {
1327 struct wpa_scan_res *res;
1328 const u8 *ssid_ie;
1329
1330 res = scan_res->res[j];
1331 if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
1332 res->age > WNM_SCAN_RESULT_AGE * 1000)
1333 continue;
1334 bss = wpa_s->current_bss;
1335 ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
1336 if (bss && ssid_ie &&
1337 (bss->ssid_len != ssid_ie[1] ||
1338 os_memcmp(bss->ssid, ssid_ie + 2,
1339 bss->ssid_len) != 0))
1340 continue;
1341
1342 /* Potential candidate found */
1343 found = 1;
1344 scan_snr(res);
1345 scan_est_throughput(wpa_s, res);
1346 wpa_bss_update_scan_res(wpa_s, res,
1347 &scan_res->fetch_time);
1348 }
1349 }
1350
1351 wpa_scan_results_free(scan_res);
1352 if (!found) {
1353 wpa_dbg(wpa_s, MSG_DEBUG,
1354 "WNM: No transition candidate matches existing scan results");
1355 return 0;
1356 }
1357
af8bc24d 1358 bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL);
2f195639
KV		 1359 if (!bss) {
1360 wpa_dbg(wpa_s, MSG_DEBUG,
1361 "WNM: Comparison of scan results against transition candidates did not find matches");
1362 return 0;
1363 }
1364
1365 /* Associate to the network */
1366 wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
1367 return 1;
1368}
1369
1370
2049a875
JM		 1371static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1372 const u8 *pos, const u8 *end,
1373 int reply)
1374{
8c9af762
JM		 1375 unsigned int beacon_int;
1376 u8 valid_int;
dd599908
AS		 1377#ifdef CONFIG_MBO
1378 const u8 *vendor;
1379#endif /* CONFIG_MBO */
8c9af762 1380
2e06cef8 1381 if (wpa_s->disable_mbo_oce || wpa_s->conf->disable_btm)
ef59f987
AB		 1382 return;
1383
bdce45b8 1384 if (end - pos < 5)
2049a875
JM		 1385 return;
1386
af8bc24d
KV		 1387#ifdef CONFIG_MBO
1388 wpa_s->wnm_mbo_trans_reason_present = 0;
1389 wpa_s->wnm_mbo_transition_reason = 0;
1390#endif /* CONFIG_MBO */
1391
8c9af762
JM		 1392 if (wpa_s->current_bss)
1393 beacon_int = wpa_s->current_bss->beacon_int;
1394 else
1395 beacon_int = 100; /* best guess */
1396
e27d20bb
VK		 1397 wpa_s->wnm_dialog_token = pos[0];
1398 wpa_s->wnm_mode = pos[1];
1399 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
8c9af762 1400 valid_int = pos[4];
e27d20bb 1401 wpa_s->wnm_reply = reply;
2049a875
JM		 1402
1403 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1404 "dialog_token=%u request_mode=0x%x "
1405 "disassoc_timer=%u validity_interval=%u",
e27d20bb 1406 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
8c9af762 1407 wpa_s->wnm_dissoc_timer, valid_int);
e27d20bb 1408
a483c6f1 1409#if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS)
1410 if (wpa_s->reject_btm_req_reason) {
1411 wpa_printf(MSG_INFO,
1412 "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d",
1413 wpa_s->reject_btm_req_reason);
af8bc24d
KV		 1414 wnm_send_bss_transition_mgmt_resp(
1415 wpa_s, wpa_s->wnm_dialog_token,
1416 wpa_s->reject_btm_req_reason,
6a4363f5 1417 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
a483c6f1 1418 return;
1419 }
1420#endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */
1421
2049a875 1422 pos += 5;
e27d20bb 1423
7b53acd3 1424 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
bdce45b8 1425 if (end - pos < 12) {
e27d20bb
VK		 1426 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1427 return;
1428 }
1429 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
2049a875 1430 pos += 12; /* BSS Termination Duration */
e27d20bb
VK		 1431 }
1432
7b53acd3 1433 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
2049a875 1434 char url[256];
ae8535b6 1435
bdce45b8 1436 if (end - pos < 1 || 1 + pos[0] > end - pos) {
2049a875
JM		 1437 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1438 "Management Request (URL)");
1439 return;
1440 }
1441 os_memcpy(url, pos + 1, pos[0]);
1442 url[pos[0]] = '\0';
e27d20bb 1443 pos += 1 + pos[0];
ae8535b6 1444
ae8535b6
JM		 1445 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1446 wpa_sm_pmf_enabled(wpa_s->wpa),
1447 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
2049a875
JM		 1448 }
1449
7b53acd3 1450 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
2049a875 1451 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
e27d20bb
VK		 1452 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1453 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
2049a875
JM		 1454 /* TODO: mark current BSS less preferred for
1455 * selection */
1456 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1457 wpa_supplicant_req_scan(wpa_s, 0, 0);
1458 }
1459 }
1460
dd599908
AS		 1461#ifdef CONFIG_MBO
1462 vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
1463 if (vendor)
1464 wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
1465#endif /* CONFIG_MBO */
1466
7b53acd3 1467 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
8c9af762
JM		 1468 unsigned int valid_ms;
1469
e27d20bb 1470 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
279b5486 1471 wnm_deallocate_memory(wpa_s);
faebdeaa
JM		 1472 wpa_s->wnm_neighbor_report_elements = os_calloc(
1473 WNM_MAX_NEIGHBOR_REPORT,
e27d20bb
VK		 1474 sizeof(struct neighbor_report));
1475 if (wpa_s->wnm_neighbor_report_elements == NULL)
1476 return;
1477
bdce45b8 1478 while (end - pos >= 2 &&
e27d20bb
VK		 1479 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1480 {
1481 u8 tag = *pos++;
1482 u8 len = *pos++;
1483
1484 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1485 tag);
bdce45b8 1486 if (len > end - pos) {
e27d20bb
VK		 1487 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1488 return;
1489 }
1aa6f953
JM		 1490 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1491 struct neighbor_report *rep;
1492 rep = &wpa_s->wnm_neighbor_report_elements[
1493 wpa_s->wnm_num_neighbor_report];
1494 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
f420577f 1495 wpa_s->wnm_num_neighbor_report++;
af8bc24d
KV		 1496#ifdef CONFIG_MBO
1497 if (wpa_s->wnm_mbo_trans_reason_present &&
1498 wpa_s->wnm_num_neighbor_report == 1) {
1499 rep->is_first = 1;
1500 wpa_printf(MSG_DEBUG,
1501 "WNM: First transition candidate is "
1502 MACSTR, MAC2STR(rep->bssid));
1503 }
1504#endif /* CONFIG_MBO */
1aa6f953 1505 }
e27d20bb
VK		 1506
1507 pos += len;
e27d20bb 1508 }
d14e63a2
AS		 1509
1510 if (!wpa_s->wnm_num_neighbor_report) {
1511 wpa_printf(MSG_DEBUG,
1512 "WNM: Candidate list included bit is set, but no candidates found");
1513 wnm_send_bss_transition_mgmt_resp(
1514 wpa_s, wpa_s->wnm_dialog_token,
1515 WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
6a4363f5
VK		 1516 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1517 NULL);
d14e63a2
AS		 1518 return;
1519 }
1520
ff2c5758 1521 wnm_sort_cand_list(wpa_s);
8040dc53 1522 wnm_dump_cand_list(wpa_s);
8c9af762
JM		 1523 valid_ms = valid_int * beacon_int * 128 / 125;
1524 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1525 valid_ms);
1526 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1527 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1528 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1529 wpa_s->wnm_cand_valid_until.sec +=
1530 wpa_s->wnm_cand_valid_until.usec / 1000000;
1531 wpa_s->wnm_cand_valid_until.usec %= 1000000;
d0b9ab69 1532 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
e27d20bb 1533
2f195639
KV		 1534 /*
1535 * Fetch the latest scan results from the kernel and check for
1536 * candidates based on those results first. This can help in
1537 * finding more up-to-date information should the driver has
1538 * done some internal scanning operations after the last scan
1539 * result update in wpa_supplicant.
1540 */
1541 if (wnm_fetch_scan_results(wpa_s) > 0)
1542 return;
1543
1544 /*
1545 * Try to use previously received scan results, if they are
1546 * recent enough to use for a connection.
1547 */
75d65857
JM		 1548 if (wpa_s->last_scan_res_used > 0) {
1549 struct os_reltime now;
1550
1551 os_get_reltime(&now);
1552 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1553 wpa_printf(MSG_DEBUG,
1554 "WNM: Try to use recent scan results");
1555 if (wnm_scan_process(wpa_s, 0) > 0)
1556 return;
1557 wpa_printf(MSG_DEBUG,
1558 "WNM: No match in previous scan results - try a new scan");
1559 }
1560 }
1561
e1117c1c 1562 wnm_set_scan_freqs(wpa_s);
0645492e
JM		 1563 if (wpa_s->wnm_num_neighbor_report == 1) {
1564 os_memcpy(wpa_s->next_scan_bssid,
1565 wpa_s->wnm_neighbor_report_elements[0].bssid,
1566 ETH_ALEN);
1567 wpa_printf(MSG_DEBUG,
1568 "WNM: Scan only for a specific BSSID since there is only a single candidate "
1569 MACSTR, MAC2STR(wpa_s->next_scan_bssid));
1570 }
e27d20bb
VK		 1571 wpa_supplicant_req_scan(wpa_s, 0, 0);
1572 } else if (reply) {
6df634fa
JM		 1573 enum bss_trans_mgmt_status_code status;
1574 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1575 status = WNM_BSS_TM_ACCEPT;
1576 else {
1577 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1578 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1579 }
af8bc24d
KV		 1580 wnm_send_bss_transition_mgmt_resp(
1581 wpa_s, wpa_s->wnm_dialog_token, status,
6a4363f5 1582 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
2049a875
JM		 1583 }
1584}
1585
1586
13bf18ed
AS		 1587#define BTM_QUERY_MIN_SIZE 4
1588
65bcd0a9 1589int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
15ab61ed
AS		 1590 u8 query_reason,
1591 const char *btm_candidates,
1592 int cand_list)
65bcd0a9 1593{
13bf18ed 1594 struct wpabuf *buf;
65bcd0a9
VK		 1595 int ret;
1596
1597 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
9a493fab
AS		 1598 MACSTR " query_reason=%u%s",
1599 MAC2STR(wpa_s->bssid), query_reason,
1600 cand_list ? " candidate list" : "");
65bcd0a9 1601
13bf18ed
AS		 1602 buf = wpabuf_alloc(BTM_QUERY_MIN_SIZE);
1603 if (!buf)
1604 return -1;
65bcd0a9 1605
13bf18ed
AS		 1606 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1607 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_QUERY);
1608 wpabuf_put_u8(buf, 1);
1609 wpabuf_put_u8(buf, query_reason);
9a493fab 1610
13bf18ed
AS		 1611 if (cand_list)
1612 wnm_add_cand_list(wpa_s, &buf);
65bcd0a9 1613
15ab61ed
AS		 1614 if (btm_candidates) {
1615 const size_t max_len = 1000;
1616
1617 ret = wpabuf_resize(&buf, max_len);
1618 if (ret < 0) {
1619 wpabuf_free(buf);
1620 return ret;
1621 }
1622
1623 ret = ieee802_11_parse_candidate_list(btm_candidates,
1624 wpabuf_put(buf, 0),
1625 max_len);
1626 if (ret < 0) {
1627 wpabuf_free(buf);
1628 return ret;
1629 }
1630
1631 wpabuf_put(buf, ret);
1632 }
1633
65bcd0a9
VK		 1634 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1635 wpa_s->own_addr, wpa_s->bssid,
13bf18ed 1636 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
65bcd0a9 1637
13bf18ed 1638 wpabuf_free(buf);
65bcd0a9
VK		 1639 return ret;
1640}
1641
1642
95a3ea94
JM		 1643static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1644 const u8 *sa, const u8 *data,
1645 int len)
1646{
7ef69479 1647 const u8 *pos, *end, *next;
95a3ea94
JM		 1648 u8 ie, ie_len;
1649
1650 pos = data;
1651 end = data + len;
1652
bdce45b8 1653 while (end - pos > 1) {
95a3ea94
JM		 1654 ie = *pos++;
1655 ie_len = *pos++;
1656 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1657 ie, ie_len);
1658 if (ie_len > end - pos) {
1659 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1660 "subelement");
1661 break;
1662 }
7ef69479
JM		 1663 next = pos + ie_len;
1664 if (ie_len < 4) {
1665 pos = next;
1666 continue;
1667 }
1668 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1669 WPA_GET_BE24(pos), pos[3]);
95a3ea94
JM		 1670
1671#ifdef CONFIG_HS20
1672 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1673 WPA_GET_BE24(pos) == OUI_WFA &&
1674 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1675 /* Subscription Remediation subelement */
1676 const u8 *ie_end;
1677 u8 url_len;
1678 char *url;
1679 u8 osu_method;
1680
1681 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1682 "subelement");
1683 ie_end = pos + ie_len;
1684 pos += 4;
1685 url_len = *pos++;
1686 if (url_len == 0) {
1687 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1688 url = NULL;
1689 osu_method = 1;
1690 } else {
bdce45b8 1691 if (url_len + 1 > ie_end - pos) {
95a3ea94
JM		 1692 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1693 url_len,
1694 (int) (ie_end - pos));
1695 break;
1696 }
1697 url = os_malloc(url_len + 1);
1698 if (url == NULL)
1699 break;
1700 os_memcpy(url, pos, url_len);
1701 url[url_len] = '\0';
1702 osu_method = pos[url_len];
1703 }
1704 hs20_rx_subscription_remediation(wpa_s, url,
1705 osu_method);
1706 os_free(url);
7ef69479
JM		 1707 pos = next;
1708 continue;
1709 }
1710
1711 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1712 WPA_GET_BE24(pos) == OUI_WFA &&
1713 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1714 const u8 *ie_end;
1715 u8 url_len;
1716 char *url;
1717 u8 code;
1718 u16 reauth_delay;
1719
1720 ie_end = pos + ie_len;
1721 pos += 4;
1722 code = *pos++;
1723 reauth_delay = WPA_GET_LE16(pos);
1724 pos += 2;
1725 url_len = *pos++;
1726 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1727 "Imminent - Reason Code %u "
1728 "Re-Auth Delay %u URL Length %u",
1729 code, reauth_delay, url_len);
bdce45b8 1730 if (url_len > ie_end - pos)
7ef69479
JM		 1731 break;
1732 url = os_malloc(url_len + 1);
1733 if (url == NULL)
1734 break;
1735 os_memcpy(url, pos, url_len);
1736 url[url_len] = '\0';
1737 hs20_rx_deauth_imminent_notice(wpa_s, code,
1738 reauth_delay, url);
7fc6a024
JM		 1739 os_free(url);
1740 pos = next;
1741 continue;
1742 }
1743
1744 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1745 WPA_GET_BE24(pos) == OUI_WFA &&
1746 pos[3] == HS20_WNM_T_C_ACCEPTANCE) {
1747 const u8 *ie_end;
1748 u8 url_len;
1749 char *url;
1750
1751 ie_end = pos + ie_len;
1752 pos += 4;
1753 url_len = *pos++;
1754 wpa_printf(MSG_DEBUG,
1755 "WNM: HS 2.0 Terms and Conditions Acceptance (URL Length %u)",
1756 url_len);
1757 if (url_len > ie_end - pos)
1758 break;
1759 url = os_malloc(url_len + 1);
1760 if (!url)
1761 break;
1762 os_memcpy(url, pos, url_len);
1763 url[url_len] = '\0';
1764 hs20_rx_t_c_acceptance(wpa_s, url);
7ef69479
JM		 1765 os_free(url);
1766 pos = next;
1767 continue;
95a3ea94
JM		 1768 }
1769#endif /* CONFIG_HS20 */
1770
7ef69479 1771 pos = next;
95a3ea94
JM		 1772 }
1773}
1774
1775
1776static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1777 const u8 *sa, const u8 *frm, int len)
1778{
1779 const u8 *pos, *end;
1780 u8 dialog_token, type;
1781
1782 /* Dialog Token [1] | Type [1] | Subelements */
1783
1784 if (len < 2 || sa == NULL)
1785 return;
1786 end = frm + len;
1787 pos = frm;
1788 dialog_token = *pos++;
1789 type = *pos++;
1790
1791 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1792 "(dialog_token %u type %u sa " MACSTR ")",
1793 dialog_token, type, MAC2STR(sa));
1794 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1795 pos, end - pos);
1796
1797 if (wpa_s->wpa_state != WPA_COMPLETED ||
1798 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1799 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1800 "from our AP - ignore it");
1801 return;
1802 }
1803
1804 switch (type) {
1805 case 1:
1806 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1807 break;
1808 default:
1809 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1810 "WNM-Notification type %u", type);
1811 break;
1812 }
1813}
1814
1815
d514b502
JM		 1816static void ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant *wpa_s,
1817 const u8 *sa, const u8 *frm,
1818 int len)
1819{
1820 u8 dialog_token, req_info, auto_report, timeout;
1821
1822 if (!wpa_s->conf->coloc_intf_reporting)
1823 return;
1824
1825 /* Dialog Token [1] | Request Info [1] */
1826
1827 if (len < 2)
1828 return;
1829 dialog_token = frm[0];
1830 req_info = frm[1];
1831 auto_report = req_info & 0x03;
1832 timeout = req_info >> 2;
1833
1834 wpa_dbg(wpa_s, MSG_DEBUG,
1835 "WNM: Received Collocated Interference Request (dialog_token %u auto_report %u timeout %u sa " MACSTR ")",
1836 dialog_token, auto_report, timeout, MAC2STR(sa));
1837
1838 if (dialog_token == 0)
1839 return; /* only nonzero values are used for request */
1840
1841 if (wpa_s->wpa_state != WPA_COMPLETED ||
1842 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1843 wpa_dbg(wpa_s, MSG_DEBUG,
1844 "WNM: Collocated Interference Request frame not from current AP - ignore it");
1845 return;
1846 }
1847
1848 wpa_msg(wpa_s, MSG_INFO, COLOC_INTF_REQ "%u %u %u",
1849 dialog_token, auto_report, timeout);
1850 wpa_s->coloc_intf_dialog_token = dialog_token;
1851 wpa_s->coloc_intf_auto_report = auto_report;
1852 wpa_s->coloc_intf_timeout = timeout;
1853}
1854
1855
75cad1a0 1856void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
dbfb8e82 1857 const struct ieee80211_mgmt *mgmt, size_t len)
75cad1a0 1858{
27c77751 1859 const u8 *pos, *end;
2049a875 1860 u8 act;
27c77751 1861
dbfb8e82 1862 if (len < IEEE80211_HDRLEN + 2)
27c77751
JM		 1863 return;
1864
2703fb4a 1865 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
27c77751 1866 act = *pos++;
dbfb8e82 1867 end = ((const u8 *) mgmt) + len;
27c77751
JM		 1868
1869 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
dbfb8e82 1870 act, MAC2STR(mgmt->sa));
2049a875 1871 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
dbfb8e82 1872 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
2049a875
JM		 1873 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1874 "frame");
1875 return;
1876 }
75cad1a0
XC		 1877
1878 switch (act) {
27c77751 1879 case WNM_BSS_TRANS_MGMT_REQ:
2049a875 1880 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
dbfb8e82 1881 !(mgmt->da[0] & 0x01));
27c77751 1882 break;
75cad1a0 1883 case WNM_SLEEP_MODE_RESP:
dbfb8e82 1884 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
75cad1a0 1885 break;
95a3ea94
JM		 1886 case WNM_NOTIFICATION_REQ:
1887 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1888 break;
d514b502
JM		 1889 case WNM_COLLOCATED_INTERFERENCE_REQ:
1890 ieee802_11_rx_wnm_coloc_intf_req(wpa_s, mgmt->sa, pos,
1891 end - pos);
1892 break;
75cad1a0 1893 default:
e27d20bb 1894 wpa_printf(MSG_ERROR, "WNM: Unknown request");
75cad1a0
XC		 1895 break;
1896 }
1897}
d514b502
JM		 1898
1899
1900int wnm_send_coloc_intf_report(struct wpa_supplicant *wpa_s, u8 dialog_token,
1901 const struct wpabuf *elems)
1902{
1903 struct wpabuf *buf;
1904 int ret;
1905
1906 if (wpa_s->wpa_state < WPA_ASSOCIATED || !elems)
1907 return -1;
1908
1909 wpa_printf(MSG_DEBUG, "WNM: Send Collocated Interference Report to "
1910 MACSTR " (dialog token %u)",
1911 MAC2STR(wpa_s->bssid), dialog_token);
1912
1913 buf = wpabuf_alloc(3 + wpabuf_len(elems));
1914 if (!buf)
1915 return -1;
1916
1917 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1918 wpabuf_put_u8(buf, WNM_COLLOCATED_INTERFERENCE_REPORT);
1919 wpabuf_put_u8(buf, dialog_token);
1920 wpabuf_put_buf(buf, elems);
1921
1922 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1923 wpa_s->own_addr, wpa_s->bssid,
1924 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1925 wpabuf_free(buf);
1926 return ret;
1927}
1928
1929
1930void wnm_set_coloc_intf_elems(struct wpa_supplicant *wpa_s,
1931 struct wpabuf *elems)
1932{
1933 wpabuf_free(wpa_s->coloc_intf_elems);
1934 if (elems && wpabuf_len(elems) == 0) {
1935 wpabuf_free(elems);
1936 elems = NULL;
1937 }
1938 wpa_s->coloc_intf_elems = elems;
1939
1940 if (wpa_s->conf->coloc_intf_reporting && wpa_s->coloc_intf_elems &&
1941 wpa_s->coloc_intf_dialog_token &&
1942 (wpa_s->coloc_intf_auto_report == 1 ||
1943 wpa_s->coloc_intf_auto_report == 3)) {
1944 /* TODO: Check that there has not been less than
1945 * wpa_s->coloc_intf_timeout * 200 TU from the last report.
1946 */
1947 wnm_send_coloc_intf_report(wpa_s,
1948 wpa_s->coloc_intf_dialog_token,
1949 wpa_s->coloc_intf_elems);
1950 }
1951}
1952
1953
1954void wnm_clear_coloc_intf_reporting(struct wpa_supplicant *wpa_s)
1955{
1956#ifdef CONFIG_WNM
1957 wpa_s->coloc_intf_dialog_token = 0;
1958 wpa_s->coloc_intf_auto_report = 0;
1959#endif /* CONFIG_WNM */
1960}
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