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WNM: Ignore WNM-Sleep Mode Response if WNM-Sleep Mode has not been used
[thirdparty/hostap.git] / wpa_supplicant / wnm_sta.c
CommitLineData
75cad1a0
XC		 1/*
2 * wpa_supplicant - WNM
ae8535b6 3 * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
75cad1a0
XC		 4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "utils/includes.h"
10
11#include "utils/common.h"
12#include "common/ieee802_11_defs.h"
e1117c1c 13#include "common/ieee802_11_common.h"
ae8535b6 14#include "common/wpa_ctrl.h"
75cad1a0 15#include "rsn_supp/wpa.h"
61c54976
JM		 16#include "wpa_supplicant_i.h"
17#include "driver_i.h"
2049a875 18#include "scan.h"
e27d20bb
VK		 19#include "ctrl_iface.h"
20#include "bss.h"
21#include "wnm_sta.h"
95a3ea94 22#include "hs20_supplicant.h"
75cad1a0
XC		 23
24#define MAX_TFS_IE_LEN 1024
e27d20bb 25#define WNM_MAX_NEIGHBOR_REPORT 10
75cad1a0 26
75cad1a0
XC		 27
28/* get the TFS IE from driver */
29static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
30 u16 *buf_len, enum wnm_oper oper)
31{
32 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
33
34 return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
35}
36
37
38/* set the TFS IE to driver */
39static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
dacd789f 40 const u8 *addr, const u8 *buf, u16 buf_len,
75cad1a0
XC		 41 enum wnm_oper oper)
42{
dacd789f
JM		 43 u16 len = buf_len;
44
75cad1a0
XC		 45 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
46
dacd789f 47 return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
75cad1a0
XC		 48}
49
50
51/* MLME-SLEEPMODE.request */
52int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
cd0ef657 53 u8 action, u16 intval, struct wpabuf *tfs_req)
75cad1a0
XC		 54{
55 struct ieee80211_mgmt *mgmt;
56 int res;
57 size_t len;
58 struct wnm_sleep_element *wnmsleep_ie;
59 u8 *wnmtfs_ie;
60 u8 wnmsleep_ie_len;
61 u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
62 enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
63 WNM_SLEEP_TFS_REQ_IE_NONE;
64
cd0ef657
JM		 65 wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
66 "action=%s to " MACSTR,
67 action == 0 ? "enter" : "exit",
68 MAC2STR(wpa_s->bssid));
69
75cad1a0
XC		 70 /* WNM-Sleep Mode IE */
71 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
72 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
73 if (wnmsleep_ie == NULL)
74 return -1;
75 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
76 wnmsleep_ie->len = wnmsleep_ie_len - 2;
77 wnmsleep_ie->action_type = action;
78 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
e9199e31 79 wnmsleep_ie->intval = host_to_le16(intval);
cd0ef657
JM		 80 wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
81 (u8 *) wnmsleep_ie, wnmsleep_ie_len);
75cad1a0
XC		 82
83 /* TFS IE(s) */
cd0ef657
JM		 84 if (tfs_req) {
85 wnmtfs_ie_len = wpabuf_len(tfs_req);
86 wnmtfs_ie = os_malloc(wnmtfs_ie_len);
87 if (wnmtfs_ie == NULL) {
88 os_free(wnmsleep_ie);
89 return -1;
90 }
91 os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
92 } else {
93 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
94 if (wnmtfs_ie == NULL) {
95 os_free(wnmsleep_ie);
96 return -1;
97 }
98 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
99 tfs_oper)) {
100 wnmtfs_ie_len = 0;
101 os_free(wnmtfs_ie);
102 wnmtfs_ie = NULL;
103 }
75cad1a0 104 }
cd0ef657
JM		 105 wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
106 (u8 *) wnmtfs_ie, wnmtfs_ie_len);
75cad1a0
XC		 107
108 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
109 if (mgmt == NULL) {
110 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
111 "WNM-Sleep Request action frame");
14df897c
JM		 112 os_free(wnmsleep_ie);
113 os_free(wnmtfs_ie);
75cad1a0
XC		 114 return -1;
115 }
116
117 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
118 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
119 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
120 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
121 WLAN_FC_STYPE_ACTION);
122 mgmt->u.action.category = WLAN_ACTION_WNM;
123 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
e0c54a15 124 mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
75cad1a0
XC		 125 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
126 wnmsleep_ie_len);
127 /* copy TFS IE here */
128 if (wnmtfs_ie_len > 0) {
129 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
130 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
131 }
132
133 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
134 wnmtfs_ie_len;
135
136 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
137 wpa_s->own_addr, wpa_s->bssid,
138 &mgmt->u.action.category, len, 0);
139 if (res < 0)
140 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
141 "(action=%d, intval=%d)", action, intval);
03ed0a52
JM		 142 else
143 wpa_s->wnmsleep_used = 1;
75cad1a0
XC		 144
145 os_free(wnmsleep_ie);
146 os_free(wnmtfs_ie);
147 os_free(mgmt);
148
149 return res;
150}
151
152
74b4a360 153static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
dacd789f
JM		 154 const u8 *tfsresp_ie_start,
155 const u8 *tfsresp_ie_end)
74b4a360
JM		 156{
157 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
158 wpa_s->bssid, NULL, NULL);
159 /* remove GTK/IGTK ?? */
160
161 /* set the TFS Resp IE(s) */
162 if (tfsresp_ie_start && tfsresp_ie_end &&
163 tfsresp_ie_end - tfsresp_ie_start >= 0) {
164 u16 tfsresp_ie_len;
165 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
166 tfsresp_ie_start;
167 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
168 /* pass the TFS Resp IE(s) to driver for processing */
169 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
170 tfsresp_ie_start,
dacd789f 171 tfsresp_ie_len,
74b4a360
JM		 172 WNM_SLEEP_TFS_RESP_IE_SET))
173 wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
174 }
175}
176
177
178static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
179 const u8 *frm, u16 key_len_total)
180{
181 u8 *ptr, *end;
182 u8 gtk_len;
183
184 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
185 NULL, NULL);
186
187 /* Install GTK/IGTK */
188
189 /* point to key data field */
dbfb8e82 190 ptr = (u8 *) frm + 1 + 2;
74b4a360
JM		 191 end = ptr + key_len_total;
192 wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
193
2cb28a4c
JM		 194 if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
195 wpa_msg(wpa_s, MSG_INFO,
196 "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
197 return;
198 }
199
bdce45b8
JM		 200 while (end - ptr > 1) {
201 if (2 + ptr[1] > end - ptr) {
74b4a360
JM		 202 wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
203 "length");
204 if (end > ptr) {
205 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
206 ptr, end - ptr);
207 }
208 break;
209 }
210 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
211 if (ptr[1] < 11 + 5) {
212 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
213 "subelem");
214 break;
215 }
216 gtk_len = *(ptr + 4);
217 if (ptr[1] < 11 + gtk_len ||
218 gtk_len < 5 || gtk_len > 32) {
219 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
220 "subelem");
221 break;
222 }
223 wpa_wnmsleep_install_key(
224 wpa_s->wpa,
225 WNM_SLEEP_SUBELEM_GTK,
226 ptr);
227 ptr += 13 + gtk_len;
228#ifdef CONFIG_IEEE80211W
229 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
230 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
231 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
232 "subelem");
233 break;
234 }
235 wpa_wnmsleep_install_key(wpa_s->wpa,
236 WNM_SLEEP_SUBELEM_IGTK, ptr);
237 ptr += 10 + WPA_IGTK_LEN;
238#endif /* CONFIG_IEEE80211W */
239 } else
240 break; /* skip the loop */
241 }
242}
243
244
75cad1a0
XC		 245static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
246 const u8 *frm, int len)
247{
248 /*
9a147ba1 249 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
75cad1a0
XC		 250 * WNM-Sleep Mode IE | TFS Response IE
251 */
dacd789f 252 const u8 *pos = frm; /* point to payload after the action field */
9a147ba1 253 u16 key_len_total;
75cad1a0
XC		 254 struct wnm_sleep_element *wnmsleep_ie = NULL;
255 /* multiple TFS Resp IE (assuming consecutive) */
dacd789f
JM		 256 const u8 *tfsresp_ie_start = NULL;
257 const u8 *tfsresp_ie_end = NULL;
fecc09ed 258 size_t left;
75cad1a0 259
03ed0a52
JM		 260 if (!wpa_s->wnmsleep_used) {
261 wpa_printf(MSG_DEBUG,
262 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode has not been used in this association");
263 return;
264 }
265
9a147ba1
JM		 266 if (len < 3)
267 return;
268 key_len_total = WPA_GET_LE16(frm + 1);
269
dbfb8e82
JM		 270 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
271 frm[0], key_len_total);
fecc09ed
JM		 272 left = len - 3;
273 if (key_len_total > left) {
68db9ab0
JM		 274 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
275 return;
276 }
fecc09ed 277 pos += 3 + key_len_total;
bdce45b8 278 while (pos - frm + 1 < len) {
75cad1a0 279 u8 ie_len = *(pos + 1);
bdce45b8 280 if (2 + ie_len > frm + len - pos) {
68db9ab0
JM		 281 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
282 break;
283 }
284 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
8acbe7f2 285 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
75cad1a0
XC		 286 wnmsleep_ie = (struct wnm_sleep_element *) pos;
287 else if (*pos == WLAN_EID_TFS_RESP) {
288 if (!tfsresp_ie_start)
289 tfsresp_ie_start = pos;
290 tfsresp_ie_end = pos;
291 } else
292 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
293 pos += ie_len + 2;
294 }
295
296 if (!wnmsleep_ie) {
297 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
298 return;
299 }
300
62f6fbb4
JM		 301 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
302 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
75cad1a0
XC		 303 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
304 "frame (action=%d, intval=%d)",
305 wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc 306 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
74b4a360
JM		 307 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
308 tfsresp_ie_end);
df80a0cc 309 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
74b4a360 310 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
75cad1a0
XC		 311 }
312 } else {
313 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
314 "(action=%d, intval=%d)",
315 wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc 316 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
75cad1a0
XC		 317 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
318 wpa_s->bssid, NULL, NULL);
df80a0cc 319 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
75cad1a0
XC		 320 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
321 wpa_s->bssid, NULL, NULL);
322 }
323}
324
325
e27d20bb
VK		 326void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
327{
328 int i;
329
330 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
e27d20bb 331 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
e27d20bb
VK		 332 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
333 }
334
ec331d09 335 wpa_s->wnm_num_neighbor_report = 0;
e27d20bb
VK		 336 os_free(wpa_s->wnm_neighbor_report_elements);
337 wpa_s->wnm_neighbor_report_elements = NULL;
338}
339
340
341static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
342 u8 id, u8 elen, const u8 *pos)
343{
344 switch (id) {
345 case WNM_NEIGHBOR_TSF:
346 if (elen < 2 + 2) {
347 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
348 break;
349 }
09322678
JM		 350 rep->tsf_offset = WPA_GET_LE16(pos);
351 rep->beacon_int = WPA_GET_LE16(pos + 2);
352 rep->tsf_present = 1;
e27d20bb
VK		 353 break;
354 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
355 if (elen < 2) {
356 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
357 "country string");
358 break;
359 }
09322678
JM		 360 os_memcpy(rep->country, pos, 2);
361 rep->country_present = 1;
e27d20bb
VK		 362 break;
363 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
364 if (elen < 1) {
365 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
366 "candidate");
367 break;
368 }
09322678
JM		 369 rep->preference = pos[0];
370 rep->preference_present = 1;
e27d20bb
VK		 371 break;
372 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
09322678
JM		 373 rep->bss_term_tsf = WPA_GET_LE64(pos);
374 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
375 rep->bss_term_present = 1;
e27d20bb
VK		 376 break;
377 case WNM_NEIGHBOR_BEARING:
378 if (elen < 8) {
379 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
380 "bearing");
381 break;
382 }
09322678
JM		 383 rep->bearing = WPA_GET_LE16(pos);
384 rep->distance = WPA_GET_LE32(pos + 2);
385 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
386 rep->bearing_present = 1;
e27d20bb
VK		 387 break;
388 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
f6ce70dc 389 if (elen < 1) {
e27d20bb
VK		 390 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
391 "pilot");
392 break;
393 }
e9cb7b92 394 os_free(rep->meas_pilot);
e27d20bb
VK		 395 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
396 if (rep->meas_pilot == NULL)
397 break;
e27d20bb 398 rep->meas_pilot->measurement_pilot = pos[0];
f6ce70dc
JM		 399 rep->meas_pilot->subelem_len = elen - 1;
400 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
e27d20bb
VK		 401 break;
402 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
f6ce70dc 403 if (elen < 5) {
e27d20bb
VK		 404 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
405 "capabilities");
406 break;
407 }
09322678
JM		 408 os_memcpy(rep->rm_capab, pos, 5);
409 rep->rm_capab_present = 1;
e27d20bb
VK		 410 break;
411 case WNM_NEIGHBOR_MULTIPLE_BSSID:
f6ce70dc 412 if (elen < 1) {
e27d20bb
VK		 413 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
414 break;
415 }
e9cb7b92 416 os_free(rep->mul_bssid);
e27d20bb
VK		 417 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
418 if (rep->mul_bssid == NULL)
419 break;
e27d20bb 420 rep->mul_bssid->max_bssid_indicator = pos[0];
f6ce70dc
JM		 421 rep->mul_bssid->subelem_len = elen - 1;
422 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
e27d20bb
VK		 423 break;
424 }
425}
426
427
e1117c1c
JM		 428static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
429{
158211b2
JM		 430 struct wpa_bss *bss = wpa_s->current_bss;
431 const char *country = NULL;
432
433 if (bss) {
434 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
435
436 if (elem && elem[1] >= 2)
437 country = (const char *) (elem + 2);
438 }
439
440 return ieee80211_chan_to_freq(country, op_class, chan);
e1117c1c
JM		 441}
442
443
e27d20bb
VK		 444static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
445 const u8 *pos, u8 len,
446 struct neighbor_report *rep)
447{
448 u8 left = len;
449
450 if (left < 13) {
451 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
452 return;
453 }
454
455 os_memcpy(rep->bssid, pos, ETH_ALEN);
4c381f0d 456 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
e27d20bb
VK		 457 rep->regulatory_class = *(pos + 10);
458 rep->channel_number = *(pos + 11);
459 rep->phy_type = *(pos + 12);
460
461 pos += 13;
462 left -= 13;
463
464 while (left >= 2) {
465 u8 id, elen;
466
467 id = *pos++;
468 elen = *pos++;
1aa6f953
JM		 469 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
470 left -= 2;
471 if (elen > left) {
472 wpa_printf(MSG_DEBUG,
473 "WNM: Truncated neighbor report subelement");
474 break;
475 }
e27d20bb 476 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
1aa6f953 477 left -= elen;
e27d20bb
VK		 478 pos += elen;
479 }
e1117c1c
JM		 480
481 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
482 rep->channel_number);
e27d20bb
VK		 483}
484
485
d0b9ab69
JM		 486static struct wpa_bss *
487compare_scan_neighbor_results(struct wpa_supplicant *wpa_s)
e27d20bb
VK		 488{
489
d0b9ab69 490 u8 i;
027454d2 491 struct wpa_bss *bss = wpa_s->current_bss;
d0b9ab69 492 struct wpa_bss *target;
e27d20bb 493
d0b9ab69 494 if (!bss)
e27d20bb
VK		 495 return 0;
496
3c1060ff 497 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
027454d2 498 MAC2STR(wpa_s->bssid), bss->level);
3c1060ff 499
d0b9ab69
JM		 500 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
501 struct neighbor_report *nei;
027454d2 502
d0b9ab69 503 nei = &wpa_s->wnm_neighbor_report_elements[i];
027454d2
JM		 504 if (nei->preference_present && nei->preference == 0) {
505 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
506 MAC2STR(nei->bssid));
507 continue;
508 }
509
d0b9ab69
JM		 510 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
511 if (!target) {
027454d2
JM		 512 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
513 " (pref %d) not found in scan results",
514 MAC2STR(nei->bssid),
515 nei->preference_present ? nei->preference :
516 -1);
517 continue;
518 }
519
d0b9ab69
JM		 520 if (bss->ssid_len != target->ssid_len ||
521 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
027454d2
JM		 522 /*
523 * TODO: Could consider allowing transition to another
524 * ESS if PMF was enabled for the association.
525 */
526 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
527 " (pref %d) in different ESS",
528 MAC2STR(nei->bssid),
529 nei->preference_present ? nei->preference :
530 -1);
531 continue;
532 }
533
d0b9ab69 534 if (target->level < bss->level && target->level < -80) {
027454d2
JM		 535 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
536 " (pref %d) does not have sufficient signal level (%d)",
537 MAC2STR(nei->bssid),
538 nei->preference_present ? nei->preference :
539 -1,
d0b9ab69 540 target->level);
027454d2
JM		 541 continue;
542 }
543
544 wpa_printf(MSG_DEBUG,
d0b9ab69 545 "WNM: Found an acceptable preferred transition candidate BSS "
027454d2 546 MACSTR " (RSSI %d)",
d0b9ab69
JM		 547 MAC2STR(nei->bssid), target->level);
548 return target;
e27d20bb
VK		 549 }
550
d0b9ab69 551 return NULL;
e27d20bb
VK		 552}
553
554
7b53acd3
JM		 555static void wnm_send_bss_transition_mgmt_resp(
556 struct wpa_supplicant *wpa_s, u8 dialog_token,
557 enum bss_trans_mgmt_status_code status, u8 delay,
558 const u8 *target_bssid)
2049a875
JM		 559{
560 u8 buf[1000], *pos;
561 struct ieee80211_mgmt *mgmt;
562 size_t len;
f5f3728a 563 int res;
2049a875
JM		 564
565 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
566 "to " MACSTR " dialog_token=%u status=%u delay=%d",
567 MAC2STR(wpa_s->bssid), dialog_token, status, delay);
d0b9ab69
JM		 568 if (!wpa_s->current_bss) {
569 wpa_printf(MSG_DEBUG,
570 "WNM: Current BSS not known - drop response");
571 return;
572 }
2049a875
JM		 573
574 mgmt = (struct ieee80211_mgmt *) buf;
575 os_memset(&buf, 0, sizeof(buf));
576 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
577 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
578 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
579 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
580 WLAN_FC_STYPE_ACTION);
581 mgmt->u.action.category = WLAN_ACTION_WNM;
582 mgmt->u.action.u.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
583 mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
584 mgmt->u.action.u.bss_tm_resp.status_code = status;
585 mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
586 pos = mgmt->u.action.u.bss_tm_resp.variable;
587 if (target_bssid) {
588 os_memcpy(pos, target_bssid, ETH_ALEN);
589 pos += ETH_ALEN;
2cd0f6a4
JM		 590 } else if (status == WNM_BSS_TM_ACCEPT) {
591 /*
592 * P802.11-REVmc clarifies that the Target BSSID field is always
593 * present when status code is zero, so use a fake value here if
594 * no BSSID is yet known.
595 */
596 os_memset(pos, 0, ETH_ALEN);
597 pos += ETH_ALEN;
2049a875
JM		 598 }
599
600 len = pos - (u8 *) &mgmt->u.action.category;
601
f5f3728a
JM		 602 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
603 wpa_s->own_addr, wpa_s->bssid,
604 &mgmt->u.action.category, len, 0);
605 if (res < 0) {
606 wpa_printf(MSG_DEBUG,
607 "WNM: Failed to send BSS Transition Management Response");
608 }
2049a875
JM		 609}
610
611
75d65857 612int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
e27d20bb 613{
d0b9ab69
JM		 614 struct wpa_bss *bss;
615 struct wpa_ssid *ssid = wpa_s->current_ssid;
616 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
e27d20bb 617
d0b9ab69
JM		 618 if (!wpa_s->wnm_neighbor_report_elements)
619 return 0;
620
621 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
622 &wpa_s->scan_trigger_time)) {
623 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
624 wnm_deallocate_memory(wpa_s);
625 return 0;
626 }
627
628 if (!wpa_s->current_bss ||
629 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
630 ETH_ALEN) != 0) {
631 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
632 return 0;
e27d20bb
VK		 633 }
634
635 /* Compare the Neighbor Report and scan results */
d0b9ab69
JM		 636 bss = compare_scan_neighbor_results(wpa_s);
637 if (!bss) {
638 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
639 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
640 goto send_bss_resp_fail;
641 }
e27d20bb 642
d0b9ab69
JM		 643 /* Associate to the network */
644 /* Send the BSS Management Response - Accept */
645 if (wpa_s->wnm_reply) {
646 wpa_s->wnm_reply = 0;
647 wnm_send_bss_transition_mgmt_resp(wpa_s,
e27d20bb 648 wpa_s->wnm_dialog_token,
7b53acd3 649 WNM_BSS_TM_ACCEPT,
d0b9ab69
JM		 650 0, bss->bssid);
651 }
e27d20bb 652
d0b9ab69
JM		 653 if (bss == wpa_s->current_bss) {
654 wpa_printf(MSG_DEBUG,
655 "WNM: Already associated with the preferred candidate");
1e74ae4d 656 wnm_deallocate_memory(wpa_s);
d0b9ab69 657 return 1;
e27d20bb
VK		 658 }
659
d0b9ab69
JM		 660 wpa_s->reassociate = 1;
661 wpa_supplicant_connect(wpa_s, bss, ssid);
662 wnm_deallocate_memory(wpa_s);
663 return 1;
664
e27d20bb 665send_bss_resp_fail:
75d65857
JM		 666 if (!reply_on_fail)
667 return 0;
668
669 /* Send reject response for all the failures */
670
e27d20bb 671 if (wpa_s->wnm_reply) {
d0b9ab69 672 wpa_s->wnm_reply = 0;
e27d20bb
VK		 673 wnm_send_bss_transition_mgmt_resp(wpa_s,
674 wpa_s->wnm_dialog_token,
d0b9ab69 675 status, 0, NULL);
e27d20bb 676 }
d0b9ab69
JM		 677 wnm_deallocate_memory(wpa_s);
678
679 return 0;
e27d20bb
VK		 680}
681
682
ff2c5758
JM		 683static int cand_pref_compar(const void *a, const void *b)
684{
685 const struct neighbor_report *aa = a;
686 const struct neighbor_report *bb = b;
687
688 if (!aa->preference_present && !bb->preference_present)
689 return 0;
690 if (!aa->preference_present)
691 return 1;
692 if (!bb->preference_present)
693 return -1;
694 if (bb->preference > aa->preference)
695 return 1;
696 if (bb->preference < aa->preference)
697 return -1;
698 return 0;
699}
700
701
702static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
703{
704 if (!wpa_s->wnm_neighbor_report_elements)
705 return;
706 qsort(wpa_s->wnm_neighbor_report_elements,
707 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
708 cand_pref_compar);
709}
710
711
8040dc53
JM		 712static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
713{
714 unsigned int i;
715
716 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
717 if (!wpa_s->wnm_neighbor_report_elements)
718 return;
719 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
720 struct neighbor_report *nei;
721
722 nei = &wpa_s->wnm_neighbor_report_elements[i];
723 wpa_printf(MSG_DEBUG, "%u: " MACSTR
e1117c1c 724 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
4c381f0d
JM		 725 i, MAC2STR(nei->bssid), nei->bssid_info,
726 nei->regulatory_class,
8040dc53 727 nei->channel_number, nei->phy_type,
e1117c1c
JM		 728 nei->preference_present ? nei->preference : -1,
729 nei->freq);
730 }
731}
732
733
734static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
735{
736 unsigned int i;
737
738 for (i = 0; i < wpa_s->hw.num_modes; i++) {
739 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
740 int j;
741
742 for (j = 0; j < mode->num_channels; j++) {
743 struct hostapd_channel_data *chan;
744
745 chan = &mode->channels[j];
746 if (chan->freq == freq &&
747 !(chan->flag & HOSTAPD_CHAN_DISABLED))
748 return 1;
749 }
750 }
751
752 return 0;
753}
754
755
756static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
757{
758 int *freqs;
759 int num_freqs = 0;
760 unsigned int i;
761
762 if (!wpa_s->wnm_neighbor_report_elements)
763 return;
764
765 if (wpa_s->hw.modes == NULL)
766 return;
767
768 os_free(wpa_s->next_scan_freqs);
769 wpa_s->next_scan_freqs = NULL;
770
771 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
772 if (freqs == NULL)
773 return;
774
775 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
776 struct neighbor_report *nei;
777
778 nei = &wpa_s->wnm_neighbor_report_elements[i];
779 if (nei->freq <= 0) {
780 wpa_printf(MSG_DEBUG,
781 "WNM: Unknown neighbor operating frequency for "
782 MACSTR " - scan all channels",
783 MAC2STR(nei->bssid));
784 os_free(freqs);
785 return;
786 }
787 if (chan_supported(wpa_s, nei->freq))
788 add_freq(freqs, &num_freqs, nei->freq);
8040dc53 789 }
e1117c1c
JM		 790
791 if (num_freqs == 0) {
792 os_free(freqs);
793 return;
794 }
795
796 wpa_printf(MSG_DEBUG,
797 "WNM: Scan %d frequencies based on transition candidate list",
798 num_freqs);
799 wpa_s->next_scan_freqs = freqs;
8040dc53
JM		 800}
801
802
2049a875
JM		 803static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
804 const u8 *pos, const u8 *end,
805 int reply)
806{
8c9af762
JM		 807 unsigned int beacon_int;
808 u8 valid_int;
809
bdce45b8 810 if (end - pos < 5)
2049a875
JM		 811 return;
812
8c9af762
JM		 813 if (wpa_s->current_bss)
814 beacon_int = wpa_s->current_bss->beacon_int;
815 else
816 beacon_int = 100; /* best guess */
817
e27d20bb
VK		 818 wpa_s->wnm_dialog_token = pos[0];
819 wpa_s->wnm_mode = pos[1];
820 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
8c9af762 821 valid_int = pos[4];
e27d20bb 822 wpa_s->wnm_reply = reply;
2049a875
JM		 823
824 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
825 "dialog_token=%u request_mode=0x%x "
826 "disassoc_timer=%u validity_interval=%u",
e27d20bb 827 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
8c9af762 828 wpa_s->wnm_dissoc_timer, valid_int);
e27d20bb 829
2049a875 830 pos += 5;
e27d20bb 831
7b53acd3 832 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
bdce45b8 833 if (end - pos < 12) {
e27d20bb
VK		 834 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
835 return;
836 }
837 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
2049a875 838 pos += 12; /* BSS Termination Duration */
e27d20bb
VK		 839 }
840
7b53acd3 841 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
2049a875 842 char url[256];
ae8535b6 843
bdce45b8 844 if (end - pos < 1 || 1 + pos[0] > end - pos) {
2049a875
JM		 845 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
846 "Management Request (URL)");
847 return;
848 }
849 os_memcpy(url, pos + 1, pos[0]);
850 url[pos[0]] = '\0';
e27d20bb 851 pos += 1 + pos[0];
ae8535b6 852
ae8535b6
JM		 853 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
854 wpa_sm_pmf_enabled(wpa_s->wpa),
855 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
2049a875
JM		 856 }
857
7b53acd3 858 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
2049a875 859 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
e27d20bb
VK		 860 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
861 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
2049a875
JM		 862 /* TODO: mark current BSS less preferred for
863 * selection */
864 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
865 wpa_supplicant_req_scan(wpa_s, 0, 0);
866 }
867 }
868
7b53acd3 869 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
8c9af762
JM		 870 unsigned int valid_ms;
871
e27d20bb 872 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
279b5486 873 wnm_deallocate_memory(wpa_s);
faebdeaa
JM		 874 wpa_s->wnm_neighbor_report_elements = os_calloc(
875 WNM_MAX_NEIGHBOR_REPORT,
e27d20bb
VK		 876 sizeof(struct neighbor_report));
877 if (wpa_s->wnm_neighbor_report_elements == NULL)
878 return;
879
bdce45b8 880 while (end - pos >= 2 &&
e27d20bb
VK		 881 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
882 {
883 u8 tag = *pos++;
884 u8 len = *pos++;
885
886 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
887 tag);
bdce45b8 888 if (len > end - pos) {
e27d20bb
VK		 889 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
890 return;
891 }
1aa6f953
JM		 892 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
893 struct neighbor_report *rep;
894 rep = &wpa_s->wnm_neighbor_report_elements[
895 wpa_s->wnm_num_neighbor_report];
896 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
897 }
e27d20bb
VK		 898
899 pos += len;
900 wpa_s->wnm_num_neighbor_report++;
901 }
ff2c5758 902 wnm_sort_cand_list(wpa_s);
8040dc53 903 wnm_dump_cand_list(wpa_s);
8c9af762
JM		 904 valid_ms = valid_int * beacon_int * 128 / 125;
905 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
906 valid_ms);
907 os_get_reltime(&wpa_s->wnm_cand_valid_until);
908 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
909 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
910 wpa_s->wnm_cand_valid_until.sec +=
911 wpa_s->wnm_cand_valid_until.usec / 1000000;
912 wpa_s->wnm_cand_valid_until.usec %= 1000000;
d0b9ab69 913 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
e27d20bb 914
75d65857
JM		 915 if (wpa_s->last_scan_res_used > 0) {
916 struct os_reltime now;
917
918 os_get_reltime(&now);
919 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
920 wpa_printf(MSG_DEBUG,
921 "WNM: Try to use recent scan results");
922 if (wnm_scan_process(wpa_s, 0) > 0)
923 return;
924 wpa_printf(MSG_DEBUG,
925 "WNM: No match in previous scan results - try a new scan");
926 }
927 }
928
e1117c1c 929 wnm_set_scan_freqs(wpa_s);
e27d20bb
VK		 930 wpa_supplicant_req_scan(wpa_s, 0, 0);
931 } else if (reply) {
6df634fa
JM		 932 enum bss_trans_mgmt_status_code status;
933 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
934 status = WNM_BSS_TM_ACCEPT;
935 else {
936 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
937 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
938 }
e27d20bb
VK		 939 wnm_send_bss_transition_mgmt_resp(wpa_s,
940 wpa_s->wnm_dialog_token,
6df634fa 941 status, 0, NULL);
2049a875
JM		 942 }
943}
944
945
65bcd0a9
VK		 946int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
947 u8 query_reason)
948{
949 u8 buf[1000], *pos;
950 struct ieee80211_mgmt *mgmt;
951 size_t len;
952 int ret;
953
954 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
955 MACSTR " query_reason=%u",
956 MAC2STR(wpa_s->bssid), query_reason);
957
958 mgmt = (struct ieee80211_mgmt *) buf;
959 os_memset(&buf, 0, sizeof(buf));
960 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
961 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
962 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
963 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
964 WLAN_FC_STYPE_ACTION);
965 mgmt->u.action.category = WLAN_ACTION_WNM;
966 mgmt->u.action.u.bss_tm_query.action = WNM_BSS_TRANS_MGMT_QUERY;
a8a6a35f 967 mgmt->u.action.u.bss_tm_query.dialog_token = 1;
65bcd0a9
VK		 968 mgmt->u.action.u.bss_tm_query.query_reason = query_reason;
969 pos = mgmt->u.action.u.bss_tm_query.variable;
970
971 len = pos - (u8 *) &mgmt->u.action.category;
972
973 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
974 wpa_s->own_addr, wpa_s->bssid,
975 &mgmt->u.action.category, len, 0);
976
977 return ret;
978}
979
980
95a3ea94
JM		 981static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
982 const u8 *sa, const u8 *data,
983 int len)
984{
7ef69479 985 const u8 *pos, *end, *next;
95a3ea94
JM		 986 u8 ie, ie_len;
987
988 pos = data;
989 end = data + len;
990
bdce45b8 991 while (end - pos > 1) {
95a3ea94
JM		 992 ie = *pos++;
993 ie_len = *pos++;
994 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
995 ie, ie_len);
996 if (ie_len > end - pos) {
997 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
998 "subelement");
999 break;
1000 }
7ef69479
JM		 1001 next = pos + ie_len;
1002 if (ie_len < 4) {
1003 pos = next;
1004 continue;
1005 }
1006 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1007 WPA_GET_BE24(pos), pos[3]);
95a3ea94
JM		 1008
1009#ifdef CONFIG_HS20
1010 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1011 WPA_GET_BE24(pos) == OUI_WFA &&
1012 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1013 /* Subscription Remediation subelement */
1014 const u8 *ie_end;
1015 u8 url_len;
1016 char *url;
1017 u8 osu_method;
1018
1019 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1020 "subelement");
1021 ie_end = pos + ie_len;
1022 pos += 4;
1023 url_len = *pos++;
1024 if (url_len == 0) {
1025 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1026 url = NULL;
1027 osu_method = 1;
1028 } else {
bdce45b8 1029 if (url_len + 1 > ie_end - pos) {
95a3ea94
JM		 1030 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1031 url_len,
1032 (int) (ie_end - pos));
1033 break;
1034 }
1035 url = os_malloc(url_len + 1);
1036 if (url == NULL)
1037 break;
1038 os_memcpy(url, pos, url_len);
1039 url[url_len] = '\0';
1040 osu_method = pos[url_len];
1041 }
1042 hs20_rx_subscription_remediation(wpa_s, url,
1043 osu_method);
1044 os_free(url);
7ef69479
JM		 1045 pos = next;
1046 continue;
1047 }
1048
1049 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1050 WPA_GET_BE24(pos) == OUI_WFA &&
1051 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1052 const u8 *ie_end;
1053 u8 url_len;
1054 char *url;
1055 u8 code;
1056 u16 reauth_delay;
1057
1058 ie_end = pos + ie_len;
1059 pos += 4;
1060 code = *pos++;
1061 reauth_delay = WPA_GET_LE16(pos);
1062 pos += 2;
1063 url_len = *pos++;
1064 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1065 "Imminent - Reason Code %u "
1066 "Re-Auth Delay %u URL Length %u",
1067 code, reauth_delay, url_len);
bdce45b8 1068 if (url_len > ie_end - pos)
7ef69479
JM		 1069 break;
1070 url = os_malloc(url_len + 1);
1071 if (url == NULL)
1072 break;
1073 os_memcpy(url, pos, url_len);
1074 url[url_len] = '\0';
1075 hs20_rx_deauth_imminent_notice(wpa_s, code,
1076 reauth_delay, url);
1077 os_free(url);
1078 pos = next;
1079 continue;
95a3ea94
JM		 1080 }
1081#endif /* CONFIG_HS20 */
1082
7ef69479 1083 pos = next;
95a3ea94
JM		 1084 }
1085}
1086
1087
1088static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1089 const u8 *sa, const u8 *frm, int len)
1090{
1091 const u8 *pos, *end;
1092 u8 dialog_token, type;
1093
1094 /* Dialog Token [1] | Type [1] | Subelements */
1095
1096 if (len < 2 || sa == NULL)
1097 return;
1098 end = frm + len;
1099 pos = frm;
1100 dialog_token = *pos++;
1101 type = *pos++;
1102
1103 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1104 "(dialog_token %u type %u sa " MACSTR ")",
1105 dialog_token, type, MAC2STR(sa));
1106 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1107 pos, end - pos);
1108
1109 if (wpa_s->wpa_state != WPA_COMPLETED ||
1110 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1111 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1112 "from our AP - ignore it");
1113 return;
1114 }
1115
1116 switch (type) {
1117 case 1:
1118 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1119 break;
1120 default:
1121 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1122 "WNM-Notification type %u", type);
1123 break;
1124 }
1125}
1126
1127
75cad1a0 1128void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
dbfb8e82 1129 const struct ieee80211_mgmt *mgmt, size_t len)
75cad1a0 1130{
27c77751 1131 const u8 *pos, *end;
2049a875 1132 u8 act;
27c77751 1133
dbfb8e82 1134 if (len < IEEE80211_HDRLEN + 2)
27c77751
JM		 1135 return;
1136
2703fb4a 1137 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
27c77751 1138 act = *pos++;
dbfb8e82 1139 end = ((const u8 *) mgmt) + len;
27c77751
JM		 1140
1141 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
dbfb8e82 1142 act, MAC2STR(mgmt->sa));
2049a875 1143 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
dbfb8e82 1144 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
2049a875
JM		 1145 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1146 "frame");
1147 return;
1148 }
75cad1a0
XC		 1149
1150 switch (act) {
27c77751 1151 case WNM_BSS_TRANS_MGMT_REQ:
2049a875 1152 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
dbfb8e82 1153 !(mgmt->da[0] & 0x01));
27c77751 1154 break;
75cad1a0 1155 case WNM_SLEEP_MODE_RESP:
dbfb8e82 1156 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
75cad1a0 1157 break;
95a3ea94
JM		 1158 case WNM_NOTIFICATION_REQ:
1159 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1160 break;
75cad1a0 1161 default:
e27d20bb 1162 wpa_printf(MSG_ERROR, "WNM: Unknown request");
75cad1a0
XC		 1163 break;
1164 }
1165}
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