1 /*
2 * hostapd - WNM
3 * Copyright (c) 2011-2014, Qualcomm Atheros, Inc.
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/wpa_ctrl.h"
15 #include "common/ocv.h"
16 #include "ap/hostapd.h"
17 #include "ap/sta_info.h"
18 #include "ap/ap_config.h"
19 #include "ap/ap_drv_ops.h"
20 #include "ap/wpa_auth.h"
21 #include "mbo_ap.h"
22 #include "wnm_ap.h"
23
24 #define MAX_TFS_IE_LEN 1024
25
26
27 /* get the TFS IE from driver */
ieee80211_11_get_tfs_ie(struct hostapd_data * hapd,const u8 * addr,u8 * buf,u16 * buf_len,enum wnm_oper oper)28 static int ieee80211_11_get_tfs_ie(struct hostapd_data *hapd, const u8 *addr,
29 u8 *buf, u16 *buf_len, enum wnm_oper oper)
30 {
31 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
32
33 return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len);
34 }
35
36
37 /* set the TFS IE to driver */
ieee80211_11_set_tfs_ie(struct hostapd_data * hapd,const u8 * addr,u8 * buf,u16 * buf_len,enum wnm_oper oper)38 static int ieee80211_11_set_tfs_ie(struct hostapd_data *hapd, const u8 *addr,
39 u8 *buf, u16 *buf_len, enum wnm_oper oper)
40 {
41 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
42
43 return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len);
44 }
45
46
47 /* MLME-SLEEPMODE.response */
ieee802_11_send_wnmsleep_resp(struct hostapd_data * hapd,const u8 * addr,u8 dialog_token,u8 action_type,u16 intval)48 static int ieee802_11_send_wnmsleep_resp(struct hostapd_data *hapd,
49 const u8 *addr, u8 dialog_token,
50 u8 action_type, u16 intval)
51 {
52 struct ieee80211_mgmt *mgmt;
53 int res;
54 size_t len;
55 size_t gtk_elem_len = 0;
56 size_t igtk_elem_len = 0;
57 size_t bigtk_elem_len = 0;
58 struct wnm_sleep_element wnmsleep_ie;
59 u8 *wnmtfs_ie, *oci_ie;
60 u8 wnmsleep_ie_len, oci_ie_len;
61 u16 wnmtfs_ie_len;
62 u8 *pos;
63 struct sta_info *sta;
64 enum wnm_oper tfs_oper = action_type == WNM_SLEEP_MODE_ENTER ?
65 WNM_SLEEP_TFS_RESP_IE_ADD : WNM_SLEEP_TFS_RESP_IE_NONE;
66
67 sta = ap_get_sta(hapd, addr);
68 if (sta == NULL) {
69 wpa_printf(MSG_DEBUG, "%s: station not found", __func__);
70 return -EINVAL;
71 }
72
73 /* WNM-Sleep Mode IE */
74 os_memset(&wnmsleep_ie, 0, sizeof(struct wnm_sleep_element));
75 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
76 wnmsleep_ie.eid = WLAN_EID_WNMSLEEP;
77 wnmsleep_ie.len = wnmsleep_ie_len - 2;
78 wnmsleep_ie.action_type = action_type;
79 wnmsleep_ie.status = WNM_STATUS_SLEEP_ACCEPT;
80 wnmsleep_ie.intval = host_to_le16(intval);
81
82 /* TFS IE(s) */
83 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
84 if (wnmtfs_ie == NULL)
85 return -1;
86 if (ieee80211_11_get_tfs_ie(hapd, addr, wnmtfs_ie, &wnmtfs_ie_len,
87 tfs_oper)) {
88 wnmtfs_ie_len = 0;
89 os_free(wnmtfs_ie);
90 wnmtfs_ie = NULL;
91 }
92
93 oci_ie = NULL;
94 oci_ie_len = 0;
95 #ifdef CONFIG_OCV
96 if (action_type == WNM_SLEEP_MODE_EXIT &&
97 wpa_auth_uses_ocv(sta->wpa_sm)) {
98 struct wpa_channel_info ci;
99
100 if (hostapd_drv_channel_info(hapd, &ci) != 0) {
101 wpa_printf(MSG_WARNING,
102 "Failed to get channel info for OCI element in WNM-Sleep Mode frame");
103 os_free(wnmtfs_ie);
104 return -1;
105 }
106 #ifdef CONFIG_TESTING_OPTIONS
107 if (hapd->conf->oci_freq_override_wnm_sleep) {
108 wpa_printf(MSG_INFO,
109 "TEST: Override OCI frequency %d -> %u MHz",
110 ci.frequency,
111 hapd->conf->oci_freq_override_wnm_sleep);
112 ci.frequency = hapd->conf->oci_freq_override_wnm_sleep;
113 }
114 #endif /* CONFIG_TESTING_OPTIONS */
115
116 oci_ie_len = OCV_OCI_EXTENDED_LEN;
117 oci_ie = os_zalloc(oci_ie_len);
118 if (!oci_ie) {
119 wpa_printf(MSG_WARNING,
120 "Failed to allocate buffer for OCI element in WNM-Sleep Mode frame");
121 os_free(wnmtfs_ie);
122 return -1;
123 }
124
125 if (ocv_insert_extended_oci(&ci, oci_ie) < 0) {
126 os_free(wnmtfs_ie);
127 os_free(oci_ie);
128 return -1;
129 }
130 }
131 #endif /* CONFIG_OCV */
132
133 #define MAX_GTK_SUBELEM_LEN 45
134 #define MAX_IGTK_SUBELEM_LEN 26
135 #define MAX_BIGTK_SUBELEM_LEN 26
136 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len +
137 MAX_GTK_SUBELEM_LEN + MAX_IGTK_SUBELEM_LEN +
138 MAX_BIGTK_SUBELEM_LEN +
139 oci_ie_len);
140 if (mgmt == NULL) {
141 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
142 "WNM-Sleep Response action frame");
143 res = -1;
144 goto fail;
145 }
146 os_memcpy(mgmt->da, addr, ETH_ALEN);
147 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
148 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
149 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
150 WLAN_FC_STYPE_ACTION);
151 mgmt->u.action.category = WLAN_ACTION_WNM;
152 mgmt->u.action.u.wnm_sleep_resp.action = WNM_SLEEP_MODE_RESP;
153 mgmt->u.action.u.wnm_sleep_resp.dialogtoken = dialog_token;
154 pos = (u8 *)mgmt->u.action.u.wnm_sleep_resp.variable;
155 /* add key data if MFP is enabled */
156 if (!wpa_auth_uses_mfp(sta->wpa_sm) ||
157 hapd->conf->wnm_sleep_mode_no_keys ||
158 action_type != WNM_SLEEP_MODE_EXIT) {
159 mgmt->u.action.u.wnm_sleep_resp.keydata_len = 0;
160 } else {
161 gtk_elem_len = wpa_wnmsleep_gtk_subelem(sta->wpa_sm, pos);
162 pos += gtk_elem_len;
163 wpa_printf(MSG_DEBUG, "Pass 4, gtk_len = %d",
164 (int) gtk_elem_len);
165 res = wpa_wnmsleep_igtk_subelem(sta->wpa_sm, pos);
166 if (res < 0)
167 goto fail;
168 igtk_elem_len = res;
169 pos += igtk_elem_len;
170 wpa_printf(MSG_DEBUG, "Pass 4 igtk_len = %d",
171 (int) igtk_elem_len);
172 if (hapd->conf->beacon_prot &&
173 (hapd->iface->drv_flags &
174 WPA_DRIVER_FLAGS_BEACON_PROTECTION)) {
175 res = wpa_wnmsleep_bigtk_subelem(sta->wpa_sm, pos);
176 if (res < 0)
177 goto fail;
178 bigtk_elem_len = res;
179 pos += bigtk_elem_len;
180 wpa_printf(MSG_DEBUG, "Pass 4 bigtk_len = %d",
181 (int) bigtk_elem_len);
182 }
183
184 WPA_PUT_LE16((u8 *)
185 &mgmt->u.action.u.wnm_sleep_resp.keydata_len,
186 gtk_elem_len + igtk_elem_len + bigtk_elem_len);
187 }
188 os_memcpy(pos, &wnmsleep_ie, wnmsleep_ie_len);
189 /* copy TFS IE here */
190 pos += wnmsleep_ie_len;
191 if (wnmtfs_ie) {
192 os_memcpy(pos, wnmtfs_ie, wnmtfs_ie_len);
193 pos += wnmtfs_ie_len;
194 }
195 #ifdef CONFIG_OCV
196 /* copy OCV OCI here */
197 if (oci_ie_len > 0)
198 os_memcpy(pos, oci_ie, oci_ie_len);
199 #endif /* CONFIG_OCV */
200
201 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_resp) + gtk_elem_len +
202 igtk_elem_len + bigtk_elem_len +
203 wnmsleep_ie_len + wnmtfs_ie_len + oci_ie_len;
204
205 /* In driver, response frame should be forced to sent when STA is in
206 * PS mode */
207 res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0,
208 mgmt->da, &mgmt->u.action.category, len);
209
210 if (!res) {
211 wpa_printf(MSG_DEBUG, "Successfully send WNM-Sleep Response "
212 "frame");
213
214 /* when entering wnmsleep
215 * 1. pause the node in driver
216 * 2. mark the node so that AP won't update GTK/IGTK/BIGTK
217 * during WNM Sleep
218 */
219 if (wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT &&
220 wnmsleep_ie.action_type == WNM_SLEEP_MODE_ENTER) {
221 sta->flags |= WLAN_STA_WNM_SLEEP_MODE;
222 hostapd_drv_wnm_oper(hapd, WNM_SLEEP_ENTER_CONFIRM,
223 addr, NULL, NULL);
224 wpa_set_wnmsleep(sta->wpa_sm, 1);
225 }
226 /* when exiting wnmsleep
227 * 1. unmark the node
228 * 2. start GTK/IGTK/BIGTK update if MFP is not used
229 * 3. unpause the node in driver
230 */
231 if ((wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT ||
232 wnmsleep_ie.status ==
233 WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) &&
234 wnmsleep_ie.action_type == WNM_SLEEP_MODE_EXIT) {
235 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
236 wpa_set_wnmsleep(sta->wpa_sm, 0);
237 hostapd_drv_wnm_oper(hapd, WNM_SLEEP_EXIT_CONFIRM,
238 addr, NULL, NULL);
239 if (!wpa_auth_uses_mfp(sta->wpa_sm) ||
240 hapd->conf->wnm_sleep_mode_no_keys)
241 wpa_wnmsleep_rekey_gtk(sta->wpa_sm);
242 }
243 } else
244 wpa_printf(MSG_DEBUG, "Fail to send WNM-Sleep Response frame");
245
246 #undef MAX_GTK_SUBELEM_LEN
247 #undef MAX_IGTK_SUBELEM_LEN
248 #undef MAX_BIGTK_SUBELEM_LEN
249 fail:
250 os_free(wnmtfs_ie);
251 os_free(oci_ie);
252 os_free(mgmt);
253 return res;
254 }
255
256
ieee802_11_rx_wnmsleep_req(struct hostapd_data * hapd,const u8 * addr,const u8 * frm,int len)257 static void ieee802_11_rx_wnmsleep_req(struct hostapd_data *hapd,
258 const u8 *addr, const u8 *frm, int len)
259 {
260 /* Dialog Token [1] | WNM-Sleep Mode IE | TFS Response IE */
261 const u8 *pos = frm;
262 u8 dialog_token;
263 struct wnm_sleep_element *wnmsleep_ie = NULL;
264 /* multiple TFS Req IE (assuming consecutive) */
265 u8 *tfsreq_ie_start = NULL;
266 u8 *tfsreq_ie_end = NULL;
267 u16 tfsreq_ie_len = 0;
268 #ifdef CONFIG_OCV
269 struct sta_info *sta;
270 const u8 *oci_ie = NULL;
271 u8 oci_ie_len = 0;
272 #endif /* CONFIG_OCV */
273
274 if (!hapd->conf->wnm_sleep_mode) {
275 wpa_printf(MSG_DEBUG, "Ignore WNM-Sleep Mode Request from "
276 MACSTR " since WNM-Sleep Mode is disabled",
277 MAC2STR(addr));
278 return;
279 }
280
281 if (len < 1) {
282 wpa_printf(MSG_DEBUG,
283 "WNM: Ignore too short WNM-Sleep Mode Request from "
284 MACSTR, MAC2STR(addr));
285 return;
286 }
287
288 dialog_token = *pos++;
289 while (pos + 1 < frm + len) {
290 u8 ie_len = pos[1];
291 if (pos + 2 + ie_len > frm + len)
292 break;
293 if (*pos == WLAN_EID_WNMSLEEP &&
294 ie_len >= (int) sizeof(*wnmsleep_ie) - 2)
295 wnmsleep_ie = (struct wnm_sleep_element *) pos;
296 else if (*pos == WLAN_EID_TFS_REQ) {
297 if (!tfsreq_ie_start)
298 tfsreq_ie_start = (u8 *) pos;
299 tfsreq_ie_end = (u8 *) pos;
300 #ifdef CONFIG_OCV
301 } else if (*pos == WLAN_EID_EXTENSION && ie_len >= 1 &&
302 pos[2] == WLAN_EID_EXT_OCV_OCI) {
303 oci_ie = pos + 3;
304 oci_ie_len = ie_len - 1;
305 #endif /* CONFIG_OCV */
306 } else
307 wpa_printf(MSG_DEBUG, "WNM: EID %d not recognized",
308 *pos);
309 pos += ie_len + 2;
310 }
311
312 if (!wnmsleep_ie) {
313 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
314 return;
315 }
316
317 #ifdef CONFIG_OCV
318 sta = ap_get_sta(hapd, addr);
319 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT &&
320 sta && wpa_auth_uses_ocv(sta->wpa_sm)) {
321 struct wpa_channel_info ci;
322
323 if (hostapd_drv_channel_info(hapd, &ci) != 0) {
324 wpa_printf(MSG_WARNING,
325 "Failed to get channel info to validate received OCI in WNM-Sleep Mode frame");
326 return;
327 }
328
329 if (ocv_verify_tx_params(oci_ie, oci_ie_len, &ci,
330 channel_width_to_int(ci.chanwidth),
331 ci.seg1_idx) != OCI_SUCCESS) {
332 wpa_msg(hapd, MSG_WARNING, "WNM: OCV failed: %s",
333 ocv_errorstr);
334 return;
335 }
336 }
337 #endif /* CONFIG_OCV */
338
339 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER &&
340 tfsreq_ie_start && tfsreq_ie_end &&
341 tfsreq_ie_end - tfsreq_ie_start >= 0) {
342 tfsreq_ie_len = (tfsreq_ie_end + tfsreq_ie_end[1] + 2) -
343 tfsreq_ie_start;
344 wpa_printf(MSG_DEBUG, "TFS Req IE(s) found");
345 /* pass the TFS Req IE(s) to driver for processing */
346 if (ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start,
347 &tfsreq_ie_len,
348 WNM_SLEEP_TFS_REQ_IE_SET))
349 wpa_printf(MSG_DEBUG, "Fail to set TFS Req IE");
350 }
351
352 ieee802_11_send_wnmsleep_resp(hapd, addr, dialog_token,
353 wnmsleep_ie->action_type,
354 le_to_host16(wnmsleep_ie->intval));
355
356 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
357 /* clear the tfs after sending the resp frame */
358 ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start,
359 &tfsreq_ie_len, WNM_SLEEP_TFS_IE_DEL);
360 }
361 }
362
363
ieee802_11_send_bss_trans_mgmt_request(struct hostapd_data * hapd,const u8 * addr,u8 dialog_token)364 static int ieee802_11_send_bss_trans_mgmt_request(struct hostapd_data *hapd,
365 const u8 *addr,
366 u8 dialog_token)
367 {
368 struct ieee80211_mgmt *mgmt;
369 size_t len;
370 u8 *pos;
371 int res;
372
373 mgmt = os_zalloc(sizeof(*mgmt));
374 if (mgmt == NULL)
375 return -1;
376 os_memcpy(mgmt->da, addr, ETH_ALEN);
377 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
378 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
379 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
380 WLAN_FC_STYPE_ACTION);
381 mgmt->u.action.category = WLAN_ACTION_WNM;
382 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
383 mgmt->u.action.u.bss_tm_req.dialog_token = dialog_token;
384 mgmt->u.action.u.bss_tm_req.req_mode = 0;
385 mgmt->u.action.u.bss_tm_req.disassoc_timer = host_to_le16(0);
386 mgmt->u.action.u.bss_tm_req.validity_interval = 1;
387 pos = mgmt->u.action.u.bss_tm_req.variable;
388
389 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to "
390 MACSTR " dialog_token=%u req_mode=0x%x disassoc_timer=%u "
391 "validity_interval=%u",
392 MAC2STR(addr), dialog_token,
393 mgmt->u.action.u.bss_tm_req.req_mode,
394 le_to_host16(mgmt->u.action.u.bss_tm_req.disassoc_timer),
395 mgmt->u.action.u.bss_tm_req.validity_interval);
396
397 len = pos - &mgmt->u.action.category;
398 res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0,
399 mgmt->da, &mgmt->u.action.category, len);
400 os_free(mgmt);
401 return res;
402 }
403
404
ieee802_11_rx_bss_trans_mgmt_query(struct hostapd_data * hapd,const u8 * addr,const u8 * frm,size_t len)405 static void ieee802_11_rx_bss_trans_mgmt_query(struct hostapd_data *hapd,
406 const u8 *addr, const u8 *frm,
407 size_t len)
408 {
409 u8 dialog_token, reason;
410 const u8 *pos, *end;
411 int enabled = hapd->conf->bss_transition;
412
413 #ifdef CONFIG_MBO
414 if (hapd->conf->mbo_enabled)
415 enabled = 1;
416 #endif /* CONFIG_MBO */
417 if (!enabled) {
418 wpa_printf(MSG_DEBUG,
419 "Ignore BSS Transition Management Query from "
420 MACSTR
421 " since BSS Transition Management is disabled",
422 MAC2STR(addr));
423 return;
424 }
425
426 if (len < 2) {
427 wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Query from "
428 MACSTR, MAC2STR(addr));
429 return;
430 }
431
432 pos = frm;
433 end = pos + len;
434 dialog_token = *pos++;
435 reason = *pos++;
436
437 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Query from "
438 MACSTR " dialog_token=%u reason=%u",
439 MAC2STR(addr), dialog_token, reason);
440
441 wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries",
442 pos, end - pos);
443
444 ieee802_11_send_bss_trans_mgmt_request(hapd, addr, dialog_token);
445 }
446
447
ap_sta_reset_steer_flag_timer(void * eloop_ctx,void * timeout_ctx)448 void ap_sta_reset_steer_flag_timer(void *eloop_ctx, void *timeout_ctx)
449 {
450 struct hostapd_data *hapd = eloop_ctx;
451 struct sta_info *sta = timeout_ctx;
452
453 if (sta->agreed_to_steer) {
454 wpa_printf(MSG_DEBUG, "%s: Reset steering flag for STA " MACSTR,
455 hapd->conf->iface, MAC2STR(sta->addr));
456 sta->agreed_to_steer = 0;
457 }
458 }
459
460
ieee802_11_rx_bss_trans_mgmt_resp(struct hostapd_data * hapd,const u8 * addr,const u8 * frm,size_t len)461 static void ieee802_11_rx_bss_trans_mgmt_resp(struct hostapd_data *hapd,
462 const u8 *addr, const u8 *frm,
463 size_t len)
464 {
465 u8 dialog_token, status_code, bss_termination_delay;
466 const u8 *pos, *end;
467 int enabled = hapd->conf->bss_transition;
468 struct sta_info *sta;
469
470 #ifdef CONFIG_MBO
471 if (hapd->conf->mbo_enabled)
472 enabled = 1;
473 #endif /* CONFIG_MBO */
474 if (!enabled) {
475 wpa_printf(MSG_DEBUG,
476 "Ignore BSS Transition Management Response from "
477 MACSTR
478 " since BSS Transition Management is disabled",
479 MAC2STR(addr));
480 return;
481 }
482
483 if (len < 3) {
484 wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Response from "
485 MACSTR, MAC2STR(addr));
486 return;
487 }
488
489 pos = frm;
490 end = pos + len;
491 dialog_token = *pos++;
492 status_code = *pos++;
493 bss_termination_delay = *pos++;
494
495 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Response from "
496 MACSTR " dialog_token=%u status_code=%u "
497 "bss_termination_delay=%u", MAC2STR(addr), dialog_token,
498 status_code, bss_termination_delay);
499
500 sta = ap_get_sta(hapd, addr);
501 if (!sta) {
502 wpa_printf(MSG_DEBUG, "Station " MACSTR
503 " not found for received BSS TM Response",
504 MAC2STR(addr));
505 return;
506 }
507
508 if (status_code == WNM_BSS_TM_ACCEPT) {
509 if (end - pos < ETH_ALEN) {
510 wpa_printf(MSG_DEBUG, "WNM: not enough room for Target BSSID field");
511 return;
512 }
513 sta->agreed_to_steer = 1;
514 eloop_cancel_timeout(ap_sta_reset_steer_flag_timer, hapd, sta);
515 eloop_register_timeout(2, 0, ap_sta_reset_steer_flag_timer,
516 hapd, sta);
517 wpa_printf(MSG_DEBUG, "WNM: Target BSSID: " MACSTR,
518 MAC2STR(pos));
519 wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR
520 " status_code=%u bss_termination_delay=%u target_bssid="
521 MACSTR,
522 MAC2STR(addr), status_code, bss_termination_delay,
523 MAC2STR(pos));
524 pos += ETH_ALEN;
525 } else {
526 sta->agreed_to_steer = 0;
527 wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR
528 " status_code=%u bss_termination_delay=%u",
529 MAC2STR(addr), status_code, bss_termination_delay);
530 }
531
532 wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries",
533 pos, end - pos);
534 }
535
536
wnm_beacon_protection_failure(struct hostapd_data * hapd,const u8 * addr)537 static void wnm_beacon_protection_failure(struct hostapd_data *hapd,
538 const u8 *addr)
539 {
540 struct sta_info *sta;
541
542 if (!hapd->conf->beacon_prot ||
543 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_BEACON_PROTECTION))
544 return;
545
546 sta = ap_get_sta(hapd, addr);
547 if (!sta || !(sta->flags & WLAN_STA_AUTHORIZED)) {
548 wpa_printf(MSG_DEBUG, "Station " MACSTR
549 " not found for received WNM-Notification Request",
550 MAC2STR(addr));
551 return;
552 }
553
554 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
555 HOSTAPD_LEVEL_INFO,
556 "Beacon protection failure reported");
557 wpa_msg(hapd->msg_ctx, MSG_INFO, WPA_EVENT_UNPROT_BEACON "reporter="
558 MACSTR, MAC2STR(addr));
559 }
560
561
ieee802_11_rx_wnm_notification_req(struct hostapd_data * hapd,const u8 * addr,const u8 * buf,size_t len)562 static void ieee802_11_rx_wnm_notification_req(struct hostapd_data *hapd,
563 const u8 *addr, const u8 *buf,
564 size_t len)
565 {
566 u8 dialog_token, type;
567
568 if (len < 2)
569 return;
570 dialog_token = *buf++;
571 type = *buf++;
572 len -= 2;
573
574 wpa_printf(MSG_DEBUG,
575 "WNM: Received WNM Notification Request frame from "
576 MACSTR " (dialog_token=%u type=%u)",
577 MAC2STR(addr), dialog_token, type);
578 wpa_hexdump(MSG_MSGDUMP, "WNM: Notification Request subelements",
579 buf, len);
580 switch (type) {
581 case WNM_NOTIF_TYPE_BEACON_PROTECTION_FAILURE:
582 wnm_beacon_protection_failure(hapd, addr);
583 break;
584 case WNM_NOTIF_TYPE_VENDOR_SPECIFIC:
585 mbo_ap_wnm_notification_req(hapd, addr, buf, len);
586 break;
587 }
588 }
589
590
ieee802_11_rx_wnm_coloc_intf_report(struct hostapd_data * hapd,const u8 * addr,const u8 * buf,size_t len)591 static void ieee802_11_rx_wnm_coloc_intf_report(struct hostapd_data *hapd,
592 const u8 *addr, const u8 *buf,
593 size_t len)
594 {
595 u8 dialog_token;
596 char *hex;
597 size_t hex_len;
598
599 if (!hapd->conf->coloc_intf_reporting) {
600 wpa_printf(MSG_DEBUG,
601 "WNM: Ignore unexpected Collocated Interference Report from "
602 MACSTR, MAC2STR(addr));
603 return;
604 }
605
606 if (len < 1) {
607 wpa_printf(MSG_DEBUG,
608 "WNM: Ignore too short Collocated Interference Report from "
609 MACSTR, MAC2STR(addr));
610 return;
611 }
612 dialog_token = *buf++;
613 len--;
614
615 wpa_printf(MSG_DEBUG,
616 "WNM: Received Collocated Interference Report frame from "
617 MACSTR " (dialog_token=%u)",
618 MAC2STR(addr), dialog_token);
619 wpa_hexdump(MSG_MSGDUMP, "WNM: Collocated Interference Report Elements",
620 buf, len);
621
622 hex_len = 2 * len + 1;
623 hex = os_malloc(hex_len);
624 if (!hex)
625 return;
626 wpa_snprintf_hex(hex, hex_len, buf, len);
627 wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, COLOC_INTF_REPORT MACSTR " %d %s",
628 MAC2STR(addr), dialog_token, hex);
629 os_free(hex);
630 }
631
632
ieee802_11_rx_wnm_action_ap(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)633 int ieee802_11_rx_wnm_action_ap(struct hostapd_data *hapd,
634 const struct ieee80211_mgmt *mgmt, size_t len)
635 {
636 u8 action;
637 const u8 *payload;
638 size_t plen;
639
640 if (len < IEEE80211_HDRLEN + 2)
641 return -1;
642
643 payload = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
644 action = *payload++;
645 plen = len - IEEE80211_HDRLEN - 2;
646
647 switch (action) {
648 case WNM_BSS_TRANS_MGMT_QUERY:
649 ieee802_11_rx_bss_trans_mgmt_query(hapd, mgmt->sa, payload,
650 plen);
651 return 0;
652 case WNM_BSS_TRANS_MGMT_RESP:
653 ieee802_11_rx_bss_trans_mgmt_resp(hapd, mgmt->sa, payload,
654 plen);
655 return 0;
656 case WNM_SLEEP_MODE_REQ:
657 ieee802_11_rx_wnmsleep_req(hapd, mgmt->sa, payload, plen);
658 return 0;
659 case WNM_NOTIFICATION_REQ:
660 ieee802_11_rx_wnm_notification_req(hapd, mgmt->sa, payload,
661 plen);
662 return 0;
663 case WNM_COLLOCATED_INTERFERENCE_REPORT:
664 ieee802_11_rx_wnm_coloc_intf_report(hapd, mgmt->sa, payload,
665 plen);
666 return 0;
667 }
668
669 wpa_printf(MSG_DEBUG, "WNM: Unsupported WNM Action %u from " MACSTR,
670 action, MAC2STR(mgmt->sa));
671 return -1;
672 }
673
674
wnm_send_disassoc_imminent(struct hostapd_data * hapd,struct sta_info * sta,int disassoc_timer)675 int wnm_send_disassoc_imminent(struct hostapd_data *hapd,
676 struct sta_info *sta, int disassoc_timer)
677 {
678 u8 buf[1000], *pos;
679 struct ieee80211_mgmt *mgmt;
680
681 os_memset(buf, 0, sizeof(buf));
682 mgmt = (struct ieee80211_mgmt *) buf;
683 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
684 WLAN_FC_STYPE_ACTION);
685 os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
686 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
687 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
688 mgmt->u.action.category = WLAN_ACTION_WNM;
689 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
690 mgmt->u.action.u.bss_tm_req.dialog_token = 1;
691 mgmt->u.action.u.bss_tm_req.req_mode =
692 WNM_BSS_TM_REQ_DISASSOC_IMMINENT;
693 mgmt->u.action.u.bss_tm_req.disassoc_timer =
694 host_to_le16(disassoc_timer);
695 mgmt->u.action.u.bss_tm_req.validity_interval = 0;
696
697 pos = mgmt->u.action.u.bss_tm_req.variable;
698
699 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request frame to indicate imminent disassociation (disassoc_timer=%d) to "
700 MACSTR, disassoc_timer, MAC2STR(sta->addr));
701 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0, NULL, 0, 0) < 0) {
702 wpa_printf(MSG_DEBUG, "Failed to send BSS Transition "
703 "Management Request frame");
704 return -1;
705 }
706
707 return 0;
708 }
709
710
set_disassoc_timer(struct hostapd_data * hapd,struct sta_info * sta,int disassoc_timer)711 static void set_disassoc_timer(struct hostapd_data *hapd, struct sta_info *sta,
712 int disassoc_timer)
713 {
714 int timeout, beacon_int;
715
716 /*
717 * Prevent STA from reconnecting using cached PMKSA to force
718 * full authentication with the authentication server (which may
719 * decide to reject the connection),
720 */
721 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
722
723 beacon_int = hapd->iconf->beacon_int;
724 if (beacon_int < 1)
725 beacon_int = 100; /* best guess */
726 /* Calculate timeout in ms based on beacon_int in TU */
727 timeout = disassoc_timer * beacon_int * 128 / 125;
728 wpa_printf(MSG_DEBUG, "Disassociation timer for " MACSTR
729 " set to %d ms", MAC2STR(sta->addr), timeout);
730
731 sta->timeout_next = STA_DISASSOC_FROM_CLI;
732 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
733 eloop_register_timeout(timeout / 1000,
734 timeout % 1000 * 1000,
735 ap_handle_timer, hapd, sta);
736 }
737
738
wnm_send_ess_disassoc_imminent(struct hostapd_data * hapd,struct sta_info * sta,const char * url,int disassoc_timer)739 int wnm_send_ess_disassoc_imminent(struct hostapd_data *hapd,
740 struct sta_info *sta, const char *url,
741 int disassoc_timer)
742 {
743 u8 buf[1000], *pos;
744 struct ieee80211_mgmt *mgmt;
745 size_t url_len;
746
747 os_memset(buf, 0, sizeof(buf));
748 mgmt = (struct ieee80211_mgmt *) buf;
749 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
750 WLAN_FC_STYPE_ACTION);
751 os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
752 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
753 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
754 mgmt->u.action.category = WLAN_ACTION_WNM;
755 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
756 mgmt->u.action.u.bss_tm_req.dialog_token = 1;
757 mgmt->u.action.u.bss_tm_req.req_mode =
758 WNM_BSS_TM_REQ_DISASSOC_IMMINENT |
759 WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT;
760 mgmt->u.action.u.bss_tm_req.disassoc_timer =
761 host_to_le16(disassoc_timer);
762 mgmt->u.action.u.bss_tm_req.validity_interval = 0x01;
763
764 pos = mgmt->u.action.u.bss_tm_req.variable;
765
766 /* Session Information URL */
767 url_len = os_strlen(url);
768 if (url_len > 255)
769 return -1;
770 *pos++ = url_len;
771 os_memcpy(pos, url, url_len);
772 pos += url_len;
773
774 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0, NULL, 0, 0) < 0) {
775 wpa_printf(MSG_DEBUG, "Failed to send BSS Transition "
776 "Management Request frame");
777 return -1;
778 }
779
780 if (disassoc_timer) {
781 /* send disassociation frame after time-out */
782 set_disassoc_timer(hapd, sta, disassoc_timer);
783 }
784
785 return 0;
786 }
787
788
wnm_send_bss_tm_req(struct hostapd_data * hapd,struct sta_info * sta,u8 req_mode,int disassoc_timer,u8 valid_int,const u8 * bss_term_dur,u8 dialog_token,const char * url,const u8 * nei_rep,size_t nei_rep_len,const u8 * mbo_attrs,size_t mbo_len)789 int wnm_send_bss_tm_req(struct hostapd_data *hapd, struct sta_info *sta,
790 u8 req_mode, int disassoc_timer, u8 valid_int,
791 const u8 *bss_term_dur, u8 dialog_token,
792 const char *url, const u8 *nei_rep, size_t nei_rep_len,
793 const u8 *mbo_attrs, size_t mbo_len)
794 {
795 u8 *buf, *pos;
796 struct ieee80211_mgmt *mgmt;
797 size_t url_len;
798
799 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to "
800 MACSTR
801 " req_mode=0x%x disassoc_timer=%d valid_int=0x%x dialog_token=%u",
802 MAC2STR(sta->addr), req_mode, disassoc_timer, valid_int,
803 dialog_token);
804 buf = os_zalloc(1000 + nei_rep_len + mbo_len);
805 if (buf == NULL)
806 return -1;
807 mgmt = (struct ieee80211_mgmt *) buf;
808 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
809 WLAN_FC_STYPE_ACTION);
810 os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
811 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
812 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
813 mgmt->u.action.category = WLAN_ACTION_WNM;
814 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
815 mgmt->u.action.u.bss_tm_req.dialog_token = dialog_token;
816 mgmt->u.action.u.bss_tm_req.req_mode = req_mode;
817 mgmt->u.action.u.bss_tm_req.disassoc_timer =
818 host_to_le16(disassoc_timer);
819 mgmt->u.action.u.bss_tm_req.validity_interval = valid_int;
820
821 pos = mgmt->u.action.u.bss_tm_req.variable;
822
823 if ((req_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) &&
824 bss_term_dur) {
825 os_memcpy(pos, bss_term_dur, 12);
826 pos += 12;
827 }
828
829 if (url) {
830 /* Session Information URL */
831 url_len = os_strlen(url);
832 if (url_len > 255) {
833 os_free(buf);
834 return -1;
835 }
836
837 *pos++ = url_len;
838 os_memcpy(pos, url, url_len);
839 pos += url_len;
840 }
841
842 if (nei_rep) {
843 os_memcpy(pos, nei_rep, nei_rep_len);
844 pos += nei_rep_len;
845 }
846
847 if (mbo_len > 0) {
848 pos += mbo_add_ie(pos, buf + sizeof(buf) - pos, mbo_attrs,
849 mbo_len);
850 }
851
852 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0, NULL, 0, 0) < 0) {
853 wpa_printf(MSG_DEBUG,
854 "Failed to send BSS Transition Management Request frame");
855 os_free(buf);
856 return -1;
857 }
858 os_free(buf);
859
860 if (disassoc_timer) {
861 /* send disassociation frame after time-out */
862 set_disassoc_timer(hapd, sta, disassoc_timer);
863 }
864
865 return 0;
866 }
867
868
wnm_send_coloc_intf_req(struct hostapd_data * hapd,struct sta_info * sta,unsigned int auto_report,unsigned int timeout)869 int wnm_send_coloc_intf_req(struct hostapd_data *hapd, struct sta_info *sta,
870 unsigned int auto_report, unsigned int timeout)
871 {
872 u8 buf[100], *pos;
873 struct ieee80211_mgmt *mgmt;
874 u8 dialog_token = 1;
875
876 if (auto_report > 3 || timeout > 63)
877 return -1;
878 os_memset(buf, 0, sizeof(buf));
879 mgmt = (struct ieee80211_mgmt *) buf;
880 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
881 WLAN_FC_STYPE_ACTION);
882 os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
883 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
884 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
885 mgmt->u.action.category = WLAN_ACTION_WNM;
886 mgmt->u.action.u.coloc_intf_req.action =
887 WNM_COLLOCATED_INTERFERENCE_REQ;
888 mgmt->u.action.u.coloc_intf_req.dialog_token = dialog_token;
889 mgmt->u.action.u.coloc_intf_req.req_info = auto_report | (timeout << 2);
890 pos = &mgmt->u.action.u.coloc_intf_req.req_info;
891 pos++;
892
893 wpa_printf(MSG_DEBUG, "WNM: Sending Collocated Interference Request to "
894 MACSTR " (dialog_token=%u auto_report=%u timeout=%u)",
895 MAC2STR(sta->addr), dialog_token, auto_report, timeout);
896 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0, NULL, 0, 0) < 0) {
897 wpa_printf(MSG_DEBUG,
898 "WNM: Failed to send Collocated Interference Request frame");
899 return -1;
900 }
901
902 return 0;
903 }
904
