Line data Source code
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 "ap/hostapd.h"
16 : #include "ap/sta_info.h"
17 : #include "ap/ap_config.h"
18 : #include "ap/ap_drv_ops.h"
19 : #include "ap/wpa_auth.h"
20 : #include "wnm_ap.h"
21 :
22 : #define MAX_TFS_IE_LEN 1024
23 :
24 :
25 : /* get the TFS IE from driver */
26 10 : static int ieee80211_11_get_tfs_ie(struct hostapd_data *hapd, const u8 *addr,
27 : u8 *buf, u16 *buf_len, enum wnm_oper oper)
28 : {
29 10 : wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
30 :
31 10 : return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len);
32 : }
33 :
34 :
35 : /* set the TFS IE to driver */
36 6 : static int ieee80211_11_set_tfs_ie(struct hostapd_data *hapd, const u8 *addr,
37 : u8 *buf, u16 *buf_len, enum wnm_oper oper)
38 : {
39 6 : wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
40 :
41 6 : return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len);
42 : }
43 :
44 :
45 : /* MLME-SLEEPMODE.response */
46 10 : static int ieee802_11_send_wnmsleep_resp(struct hostapd_data *hapd,
47 : const u8 *addr, u8 dialog_token,
48 : u8 action_type, u16 intval)
49 : {
50 : struct ieee80211_mgmt *mgmt;
51 : int res;
52 : size_t len;
53 10 : size_t gtk_elem_len = 0;
54 10 : size_t igtk_elem_len = 0;
55 : struct wnm_sleep_element wnmsleep_ie;
56 : u8 *wnmtfs_ie;
57 : u8 wnmsleep_ie_len;
58 : u16 wnmtfs_ie_len;
59 : u8 *pos;
60 : struct sta_info *sta;
61 10 : enum wnm_oper tfs_oper = action_type == WNM_SLEEP_MODE_ENTER ?
62 : WNM_SLEEP_TFS_RESP_IE_ADD : WNM_SLEEP_TFS_RESP_IE_NONE;
63 :
64 10 : sta = ap_get_sta(hapd, addr);
65 10 : if (sta == NULL) {
66 0 : wpa_printf(MSG_DEBUG, "%s: station not found", __func__);
67 0 : return -EINVAL;
68 : }
69 :
70 : /* WNM-Sleep Mode IE */
71 10 : os_memset(&wnmsleep_ie, 0, sizeof(struct wnm_sleep_element));
72 10 : wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
73 10 : wnmsleep_ie.eid = WLAN_EID_WNMSLEEP;
74 10 : wnmsleep_ie.len = wnmsleep_ie_len - 2;
75 10 : wnmsleep_ie.action_type = action_type;
76 10 : wnmsleep_ie.status = WNM_STATUS_SLEEP_ACCEPT;
77 10 : wnmsleep_ie.intval = host_to_le16(intval);
78 :
79 : /* TFS IE(s) */
80 10 : wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
81 10 : if (wnmtfs_ie == NULL)
82 0 : return -1;
83 10 : if (ieee80211_11_get_tfs_ie(hapd, addr, wnmtfs_ie, &wnmtfs_ie_len,
84 : tfs_oper)) {
85 10 : wnmtfs_ie_len = 0;
86 10 : os_free(wnmtfs_ie);
87 10 : wnmtfs_ie = NULL;
88 : }
89 :
90 : #define MAX_GTK_SUBELEM_LEN 45
91 : #define MAX_IGTK_SUBELEM_LEN 26
92 10 : mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len +
93 : MAX_GTK_SUBELEM_LEN + MAX_IGTK_SUBELEM_LEN);
94 10 : if (mgmt == NULL) {
95 0 : wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
96 : "WNM-Sleep Response action frame");
97 0 : return -1;
98 : }
99 10 : os_memcpy(mgmt->da, addr, ETH_ALEN);
100 10 : os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
101 10 : os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
102 10 : mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
103 : WLAN_FC_STYPE_ACTION);
104 10 : mgmt->u.action.category = WLAN_ACTION_WNM;
105 10 : mgmt->u.action.u.wnm_sleep_resp.action = WNM_SLEEP_MODE_RESP;
106 10 : mgmt->u.action.u.wnm_sleep_resp.dialogtoken = dialog_token;
107 10 : pos = (u8 *)mgmt->u.action.u.wnm_sleep_resp.variable;
108 : /* add key data if MFP is enabled */
109 10 : if (!wpa_auth_uses_mfp(sta->wpa_sm) ||
110 : action_type != WNM_SLEEP_MODE_EXIT) {
111 9 : mgmt->u.action.u.wnm_sleep_resp.keydata_len = 0;
112 : } else {
113 1 : gtk_elem_len = wpa_wnmsleep_gtk_subelem(sta->wpa_sm, pos);
114 1 : pos += gtk_elem_len;
115 1 : wpa_printf(MSG_DEBUG, "Pass 4, gtk_len = %d",
116 : (int) gtk_elem_len);
117 : #ifdef CONFIG_IEEE80211W
118 1 : res = wpa_wnmsleep_igtk_subelem(sta->wpa_sm, pos);
119 1 : if (res < 0) {
120 0 : os_free(wnmtfs_ie);
121 0 : os_free(mgmt);
122 0 : return -1;
123 : }
124 1 : igtk_elem_len = res;
125 1 : pos += igtk_elem_len;
126 1 : wpa_printf(MSG_DEBUG, "Pass 4 igtk_len = %d",
127 : (int) igtk_elem_len);
128 : #endif /* CONFIG_IEEE80211W */
129 :
130 2 : WPA_PUT_LE16((u8 *)
131 1 : &mgmt->u.action.u.wnm_sleep_resp.keydata_len,
132 : gtk_elem_len + igtk_elem_len);
133 : }
134 10 : os_memcpy(pos, &wnmsleep_ie, wnmsleep_ie_len);
135 : /* copy TFS IE here */
136 10 : pos += wnmsleep_ie_len;
137 10 : if (wnmtfs_ie)
138 0 : os_memcpy(pos, wnmtfs_ie, wnmtfs_ie_len);
139 :
140 20 : len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_resp) + gtk_elem_len +
141 10 : igtk_elem_len + wnmsleep_ie_len + wnmtfs_ie_len;
142 :
143 : /* In driver, response frame should be forced to sent when STA is in
144 : * PS mode */
145 10 : res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0,
146 10 : mgmt->da, &mgmt->u.action.category, len);
147 :
148 10 : if (!res) {
149 10 : wpa_printf(MSG_DEBUG, "Successfully send WNM-Sleep Response "
150 : "frame");
151 :
152 : /* when entering wnmsleep
153 : * 1. pause the node in driver
154 : * 2. mark the node so that AP won't update GTK/IGTK during
155 : * WNM Sleep
156 : */
157 20 : if (wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT &&
158 10 : wnmsleep_ie.action_type == WNM_SLEEP_MODE_ENTER) {
159 5 : sta->flags |= WLAN_STA_WNM_SLEEP_MODE;
160 5 : hostapd_drv_wnm_oper(hapd, WNM_SLEEP_ENTER_CONFIRM,
161 : addr, NULL, NULL);
162 5 : wpa_set_wnmsleep(sta->wpa_sm, 1);
163 : }
164 : /* when exiting wnmsleep
165 : * 1. unmark the node
166 : * 2. start GTK/IGTK update if MFP is not used
167 : * 3. unpause the node in driver
168 : */
169 10 : if ((wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT ||
170 0 : wnmsleep_ie.status ==
171 10 : WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) &&
172 10 : wnmsleep_ie.action_type == WNM_SLEEP_MODE_EXIT) {
173 5 : sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
174 5 : wpa_set_wnmsleep(sta->wpa_sm, 0);
175 5 : hostapd_drv_wnm_oper(hapd, WNM_SLEEP_EXIT_CONFIRM,
176 : addr, NULL, NULL);
177 5 : if (!wpa_auth_uses_mfp(sta->wpa_sm))
178 4 : wpa_wnmsleep_rekey_gtk(sta->wpa_sm);
179 : }
180 : } else
181 0 : wpa_printf(MSG_DEBUG, "Fail to send WNM-Sleep Response frame");
182 :
183 : #undef MAX_GTK_SUBELEM_LEN
184 : #undef MAX_IGTK_SUBELEM_LEN
185 10 : os_free(wnmtfs_ie);
186 10 : os_free(mgmt);
187 10 : return res;
188 : }
189 :
190 :
191 10 : static void ieee802_11_rx_wnmsleep_req(struct hostapd_data *hapd,
192 : const u8 *addr, const u8 *frm, int len)
193 : {
194 : /* Dialog Token [1] | WNM-Sleep Mode IE | TFS Response IE */
195 10 : const u8 *pos = frm;
196 : u8 dialog_token;
197 10 : struct wnm_sleep_element *wnmsleep_ie = NULL;
198 : /* multiple TFS Req IE (assuming consecutive) */
199 10 : u8 *tfsreq_ie_start = NULL;
200 10 : u8 *tfsreq_ie_end = NULL;
201 10 : u16 tfsreq_ie_len = 0;
202 :
203 10 : dialog_token = *pos++;
204 31 : while (pos + 1 < frm + len) {
205 11 : u8 ie_len = pos[1];
206 11 : if (pos + 2 + ie_len > frm + len)
207 0 : break;
208 11 : if (*pos == WLAN_EID_WNMSLEEP)
209 10 : wnmsleep_ie = (struct wnm_sleep_element *) pos;
210 1 : else if (*pos == WLAN_EID_TFS_REQ) {
211 1 : if (!tfsreq_ie_start)
212 1 : tfsreq_ie_start = (u8 *) pos;
213 1 : tfsreq_ie_end = (u8 *) pos;
214 : } else
215 0 : wpa_printf(MSG_DEBUG, "WNM: EID %d not recognized",
216 0 : *pos);
217 11 : pos += ie_len + 2;
218 : }
219 :
220 10 : if (!wnmsleep_ie) {
221 0 : wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
222 10 : return;
223 : }
224 :
225 10 : if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER &&
226 2 : tfsreq_ie_start && tfsreq_ie_end &&
227 1 : tfsreq_ie_end - tfsreq_ie_start >= 0) {
228 1 : tfsreq_ie_len = (tfsreq_ie_end + tfsreq_ie_end[1] + 2) -
229 : tfsreq_ie_start;
230 1 : wpa_printf(MSG_DEBUG, "TFS Req IE(s) found");
231 : /* pass the TFS Req IE(s) to driver for processing */
232 1 : if (ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start,
233 : &tfsreq_ie_len,
234 : WNM_SLEEP_TFS_REQ_IE_SET))
235 1 : wpa_printf(MSG_DEBUG, "Fail to set TFS Req IE");
236 : }
237 :
238 20 : ieee802_11_send_wnmsleep_resp(hapd, addr, dialog_token,
239 10 : wnmsleep_ie->action_type,
240 10 : le_to_host16(wnmsleep_ie->intval));
241 :
242 10 : if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
243 : /* clear the tfs after sending the resp frame */
244 5 : ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start,
245 : &tfsreq_ie_len, WNM_SLEEP_TFS_IE_DEL);
246 : }
247 : }
248 :
249 :
250 1 : static int ieee802_11_send_bss_trans_mgmt_request(struct hostapd_data *hapd,
251 : const u8 *addr,
252 : u8 dialog_token,
253 : const char *url)
254 : {
255 : struct ieee80211_mgmt *mgmt;
256 : size_t url_len, len;
257 : u8 *pos;
258 : int res;
259 :
260 1 : if (url)
261 0 : url_len = os_strlen(url);
262 : else
263 1 : url_len = 0;
264 :
265 1 : mgmt = os_zalloc(sizeof(*mgmt) + (url_len ? 1 + url_len : 0));
266 1 : if (mgmt == NULL)
267 0 : return -1;
268 1 : os_memcpy(mgmt->da, addr, ETH_ALEN);
269 1 : os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
270 1 : os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
271 1 : mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
272 : WLAN_FC_STYPE_ACTION);
273 1 : mgmt->u.action.category = WLAN_ACTION_WNM;
274 1 : mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
275 1 : mgmt->u.action.u.bss_tm_req.dialog_token = dialog_token;
276 1 : mgmt->u.action.u.bss_tm_req.req_mode = 0;
277 1 : mgmt->u.action.u.bss_tm_req.disassoc_timer = host_to_le16(0);
278 1 : mgmt->u.action.u.bss_tm_req.validity_interval = 1;
279 1 : pos = mgmt->u.action.u.bss_tm_req.variable;
280 1 : if (url) {
281 0 : *pos++ += url_len;
282 0 : os_memcpy(pos, url, url_len);
283 0 : pos += url_len;
284 : }
285 :
286 9 : wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to "
287 : MACSTR " dialog_token=%u req_mode=0x%x disassoc_timer=%u "
288 : "validity_interval=%u",
289 6 : MAC2STR(addr), dialog_token,
290 1 : mgmt->u.action.u.bss_tm_req.req_mode,
291 1 : le_to_host16(mgmt->u.action.u.bss_tm_req.disassoc_timer),
292 1 : mgmt->u.action.u.bss_tm_req.validity_interval);
293 :
294 1 : len = pos - &mgmt->u.action.category;
295 1 : res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0,
296 1 : mgmt->da, &mgmt->u.action.category, len);
297 1 : os_free(mgmt);
298 1 : return res;
299 : }
300 :
301 :
302 1 : static void ieee802_11_rx_bss_trans_mgmt_query(struct hostapd_data *hapd,
303 : const u8 *addr, const u8 *frm,
304 : size_t len)
305 : {
306 : u8 dialog_token, reason;
307 : const u8 *pos, *end;
308 :
309 1 : if (len < 2) {
310 0 : wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Query from "
311 0 : MACSTR, MAC2STR(addr));
312 1 : return;
313 : }
314 :
315 1 : pos = frm;
316 1 : end = pos + len;
317 1 : dialog_token = *pos++;
318 1 : reason = *pos++;
319 :
320 7 : wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Query from "
321 : MACSTR " dialog_token=%u reason=%u",
322 6 : MAC2STR(addr), dialog_token, reason);
323 :
324 1 : wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries",
325 1 : pos, end - pos);
326 :
327 1 : ieee802_11_send_bss_trans_mgmt_request(hapd, addr, dialog_token, NULL);
328 : }
329 :
330 :
331 25 : static void ieee802_11_rx_bss_trans_mgmt_resp(struct hostapd_data *hapd,
332 : const u8 *addr, const u8 *frm,
333 : size_t len)
334 : {
335 : u8 dialog_token, status_code, bss_termination_delay;
336 : const u8 *pos, *end;
337 :
338 25 : if (len < 3) {
339 0 : wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Response from "
340 0 : MACSTR, MAC2STR(addr));
341 0 : return;
342 : }
343 :
344 25 : pos = frm;
345 25 : end = pos + len;
346 25 : dialog_token = *pos++;
347 25 : status_code = *pos++;
348 25 : bss_termination_delay = *pos++;
349 :
350 175 : wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Response from "
351 : MACSTR " dialog_token=%u status_code=%u "
352 150 : "bss_termination_delay=%u", MAC2STR(addr), dialog_token,
353 : status_code, bss_termination_delay);
354 :
355 25 : if (status_code == WNM_BSS_TM_ACCEPT) {
356 6 : if (end - pos < ETH_ALEN) {
357 0 : wpa_printf(MSG_DEBUG, "WNM: not enough room for Target BSSID field");
358 0 : return;
359 : }
360 36 : wpa_printf(MSG_DEBUG, "WNM: Target BSSID: " MACSTR,
361 36 : MAC2STR(pos));
362 72 : wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR
363 : " status_code=%u bss_termination_delay=%u target_bssid="
364 : MACSTR,
365 36 : MAC2STR(addr), status_code, bss_termination_delay,
366 36 : MAC2STR(pos));
367 6 : pos += ETH_ALEN;
368 : } else {
369 133 : wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR
370 : " status_code=%u bss_termination_delay=%u",
371 114 : MAC2STR(addr), status_code, bss_termination_delay);
372 : }
373 :
374 25 : wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries",
375 25 : pos, end - pos);
376 : }
377 :
378 :
379 36 : int ieee802_11_rx_wnm_action_ap(struct hostapd_data *hapd,
380 : const struct ieee80211_mgmt *mgmt, size_t len)
381 : {
382 : u8 action;
383 : const u8 *payload;
384 : size_t plen;
385 :
386 36 : if (len < IEEE80211_HDRLEN + 2)
387 0 : return -1;
388 :
389 36 : payload = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
390 36 : action = *payload++;
391 36 : plen = len - IEEE80211_HDRLEN - 2;
392 :
393 36 : switch (action) {
394 : case WNM_BSS_TRANS_MGMT_QUERY:
395 1 : ieee802_11_rx_bss_trans_mgmt_query(hapd, mgmt->sa, payload,
396 : plen);
397 1 : return 0;
398 : case WNM_BSS_TRANS_MGMT_RESP:
399 25 : ieee802_11_rx_bss_trans_mgmt_resp(hapd, mgmt->sa, payload,
400 : plen);
401 25 : return 0;
402 : case WNM_SLEEP_MODE_REQ:
403 10 : ieee802_11_rx_wnmsleep_req(hapd, mgmt->sa, payload, plen);
404 10 : return 0;
405 : }
406 :
407 0 : wpa_printf(MSG_DEBUG, "WNM: Unsupported WNM Action %u from " MACSTR,
408 0 : action, MAC2STR(mgmt->sa));
409 0 : return -1;
410 : }
411 :
412 :
413 2 : int wnm_send_disassoc_imminent(struct hostapd_data *hapd,
414 : struct sta_info *sta, int disassoc_timer)
415 : {
416 : u8 buf[1000], *pos;
417 : struct ieee80211_mgmt *mgmt;
418 :
419 2 : os_memset(buf, 0, sizeof(buf));
420 2 : mgmt = (struct ieee80211_mgmt *) buf;
421 2 : mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
422 : WLAN_FC_STYPE_ACTION);
423 2 : os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
424 2 : os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
425 2 : os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
426 2 : mgmt->u.action.category = WLAN_ACTION_WNM;
427 2 : mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
428 2 : mgmt->u.action.u.bss_tm_req.dialog_token = 1;
429 2 : mgmt->u.action.u.bss_tm_req.req_mode =
430 : WNM_BSS_TM_REQ_DISASSOC_IMMINENT;
431 2 : mgmt->u.action.u.bss_tm_req.disassoc_timer =
432 2 : host_to_le16(disassoc_timer);
433 2 : mgmt->u.action.u.bss_tm_req.validity_interval = 0;
434 :
435 2 : pos = mgmt->u.action.u.bss_tm_req.variable;
436 :
437 12 : wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request frame to indicate imminent disassociation (disassoc_timer=%d) to "
438 12 : MACSTR, disassoc_timer, MAC2STR(sta->addr));
439 2 : if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) {
440 0 : wpa_printf(MSG_DEBUG, "Failed to send BSS Transition "
441 : "Management Request frame");
442 0 : return -1;
443 : }
444 :
445 2 : return 0;
446 : }
447 :
448 :
449 4 : static void set_disassoc_timer(struct hostapd_data *hapd, struct sta_info *sta,
450 : int disassoc_timer)
451 : {
452 : int timeout, beacon_int;
453 :
454 : /*
455 : * Prevent STA from reconnecting using cached PMKSA to force
456 : * full authentication with the authentication server (which may
457 : * decide to reject the connection),
458 : */
459 4 : wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
460 :
461 4 : beacon_int = hapd->iconf->beacon_int;
462 4 : if (beacon_int < 1)
463 0 : beacon_int = 100; /* best guess */
464 : /* Calculate timeout in ms based on beacon_int in TU */
465 4 : timeout = disassoc_timer * beacon_int * 128 / 125;
466 24 : wpa_printf(MSG_DEBUG, "Disassociation timer for " MACSTR
467 24 : " set to %d ms", MAC2STR(sta->addr), timeout);
468 :
469 4 : sta->timeout_next = STA_DISASSOC_FROM_CLI;
470 4 : eloop_cancel_timeout(ap_handle_timer, hapd, sta);
471 4 : eloop_register_timeout(timeout / 1000,
472 4 : timeout % 1000 * 1000,
473 : ap_handle_timer, hapd, sta);
474 4 : }
475 :
476 :
477 4 : int wnm_send_ess_disassoc_imminent(struct hostapd_data *hapd,
478 : struct sta_info *sta, const char *url,
479 : int disassoc_timer)
480 : {
481 : u8 buf[1000], *pos;
482 : struct ieee80211_mgmt *mgmt;
483 : size_t url_len;
484 :
485 4 : os_memset(buf, 0, sizeof(buf));
486 4 : mgmt = (struct ieee80211_mgmt *) buf;
487 4 : mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
488 : WLAN_FC_STYPE_ACTION);
489 4 : os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
490 4 : os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
491 4 : os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
492 4 : mgmt->u.action.category = WLAN_ACTION_WNM;
493 4 : mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
494 4 : mgmt->u.action.u.bss_tm_req.dialog_token = 1;
495 4 : mgmt->u.action.u.bss_tm_req.req_mode =
496 : WNM_BSS_TM_REQ_DISASSOC_IMMINENT |
497 : WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT;
498 4 : mgmt->u.action.u.bss_tm_req.disassoc_timer =
499 4 : host_to_le16(disassoc_timer);
500 4 : mgmt->u.action.u.bss_tm_req.validity_interval = 0x01;
501 :
502 4 : pos = mgmt->u.action.u.bss_tm_req.variable;
503 :
504 : /* Session Information URL */
505 4 : url_len = os_strlen(url);
506 4 : if (url_len > 255)
507 0 : return -1;
508 4 : *pos++ = url_len;
509 4 : os_memcpy(pos, url, url_len);
510 4 : pos += url_len;
511 :
512 4 : if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) {
513 0 : wpa_printf(MSG_DEBUG, "Failed to send BSS Transition "
514 : "Management Request frame");
515 0 : return -1;
516 : }
517 :
518 4 : if (disassoc_timer) {
519 : /* send disassociation frame after time-out */
520 4 : set_disassoc_timer(hapd, sta, disassoc_timer);
521 : }
522 :
523 4 : return 0;
524 : }
525 :
526 :
527 18 : int wnm_send_bss_tm_req(struct hostapd_data *hapd, struct sta_info *sta,
528 : u8 req_mode, int disassoc_timer, u8 valid_int,
529 : const u8 *bss_term_dur, const char *url,
530 : const u8 *nei_rep, size_t nei_rep_len)
531 : {
532 : u8 *buf, *pos;
533 : struct ieee80211_mgmt *mgmt;
534 : size_t url_len;
535 :
536 126 : wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to "
537 : MACSTR " req_mode=0x%x disassoc_timer=%d valid_int=0x%x",
538 108 : MAC2STR(sta->addr), req_mode, disassoc_timer, valid_int);
539 18 : buf = os_zalloc(1000 + nei_rep_len);
540 18 : if (buf == NULL)
541 0 : return -1;
542 18 : mgmt = (struct ieee80211_mgmt *) buf;
543 18 : mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
544 : WLAN_FC_STYPE_ACTION);
545 18 : os_memcpy(mgmt->da, sta->addr, ETH_ALEN);
546 18 : os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
547 18 : os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
548 18 : mgmt->u.action.category = WLAN_ACTION_WNM;
549 18 : mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
550 18 : mgmt->u.action.u.bss_tm_req.dialog_token = 1;
551 18 : mgmt->u.action.u.bss_tm_req.req_mode = req_mode;
552 18 : mgmt->u.action.u.bss_tm_req.disassoc_timer =
553 18 : host_to_le16(disassoc_timer);
554 18 : mgmt->u.action.u.bss_tm_req.validity_interval = valid_int;
555 :
556 18 : pos = mgmt->u.action.u.bss_tm_req.variable;
557 :
558 18 : if ((req_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) &&
559 : bss_term_dur) {
560 0 : os_memcpy(pos, bss_term_dur, 12);
561 0 : pos += 12;
562 : }
563 :
564 18 : if (url) {
565 : /* Session Information URL */
566 0 : url_len = os_strlen(url);
567 0 : if (url_len > 255) {
568 0 : os_free(buf);
569 0 : return -1;
570 : }
571 :
572 0 : *pos++ = url_len;
573 0 : os_memcpy(pos, url, url_len);
574 0 : pos += url_len;
575 : }
576 :
577 18 : if (nei_rep) {
578 17 : os_memcpy(pos, nei_rep, nei_rep_len);
579 17 : pos += nei_rep_len;
580 : }
581 :
582 18 : if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) {
583 0 : wpa_printf(MSG_DEBUG,
584 : "Failed to send BSS Transition Management Request frame");
585 0 : os_free(buf);
586 0 : return -1;
587 : }
588 18 : os_free(buf);
589 :
590 18 : if (disassoc_timer) {
591 : /* send disassociation frame after time-out */
592 0 : set_disassoc_timer(hapd, sta, disassoc_timer);
593 : }
594 :
595 18 : return 0;
596 : }
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