3 * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #include "utils/includes.h"
11 #include "utils/common.h"
12 #include "common/ieee802_11_defs.h"
13 #include "common/ieee802_11_common.h"
14 #include "common/wpa_ctrl.h"
15 #include "rsn_supp/wpa.h"
17 #include "wpa_supplicant_i.h"
20 #include "ctrl_iface.h"
23 #include "hs20_supplicant.h"
25 #define MAX_TFS_IE_LEN 1024
26 #define WNM_MAX_NEIGHBOR_REPORT 10
28 #define WNM_SCAN_RESULT_AGE 2 /* 2 seconds */
30 /* get the TFS IE from driver */
31 static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
32 u16 *buf_len, enum wnm_oper oper)
34 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
36 return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
40 /* set the TFS IE to driver */
41 static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
42 const u8 *addr, const u8 *buf, u16 buf_len,
47 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
49 return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
53 /* MLME-SLEEPMODE.request */
54 int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
55 u8 action, u16 intval, struct wpabuf *tfs_req)
57 struct ieee80211_mgmt *mgmt;
60 struct wnm_sleep_element *wnmsleep_ie;
63 u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
64 enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
65 WNM_SLEEP_TFS_REQ_IE_NONE;
67 wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
68 "action=%s to " MACSTR,
69 action == 0 ? "enter" : "exit",
70 MAC2STR(wpa_s->bssid));
72 /* WNM-Sleep Mode IE */
73 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
74 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
75 if (wnmsleep_ie == NULL)
77 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
78 wnmsleep_ie->len = wnmsleep_ie_len - 2;
79 wnmsleep_ie->action_type = action;
80 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
81 wnmsleep_ie->intval = host_to_le16(intval);
82 wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
83 (u8 *) wnmsleep_ie, wnmsleep_ie_len);
87 wnmtfs_ie_len = wpabuf_len(tfs_req);
88 wnmtfs_ie = os_memdup(wpabuf_head(tfs_req), wnmtfs_ie_len);
89 if (wnmtfs_ie == NULL) {
94 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
95 if (wnmtfs_ie == NULL) {
99 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
106 wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
107 (u8 *) wnmtfs_ie, wnmtfs_ie_len);
109 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
111 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
112 "WNM-Sleep Request action frame");
113 os_free(wnmsleep_ie);
118 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
119 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
120 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
121 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
122 WLAN_FC_STYPE_ACTION);
123 mgmt->u.action.category = WLAN_ACTION_WNM;
124 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
125 mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
126 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
128 /* copy TFS IE here */
129 if (wnmtfs_ie_len > 0) {
130 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
131 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
134 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
137 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
138 wpa_s->own_addr, wpa_s->bssid,
139 &mgmt->u.action.category, len, 0);
141 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
142 "(action=%d, intval=%d)", action, intval);
144 wpa_s->wnmsleep_used = 1;
146 os_free(wnmsleep_ie);
154 static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
155 const u8 *tfsresp_ie_start,
156 const u8 *tfsresp_ie_end)
158 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
159 wpa_s->bssid, NULL, NULL);
160 /* remove GTK/IGTK ?? */
162 /* set the TFS Resp IE(s) */
163 if (tfsresp_ie_start && tfsresp_ie_end &&
164 tfsresp_ie_end - tfsresp_ie_start >= 0) {
166 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
168 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
169 /* pass the TFS Resp IE(s) to driver for processing */
170 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
173 WNM_SLEEP_TFS_RESP_IE_SET))
174 wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
179 static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
180 const u8 *frm, u16 key_len_total)
185 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
188 /* Install GTK/IGTK */
190 /* point to key data field */
191 ptr = (u8 *) frm + 1 + 2;
192 end = ptr + key_len_total;
193 wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
195 if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
196 wpa_msg(wpa_s, MSG_INFO,
197 "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
201 while (end - ptr > 1) {
202 if (2 + ptr[1] > end - ptr) {
203 wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
206 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
211 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
212 if (ptr[1] < 11 + 5) {
213 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
217 gtk_len = *(ptr + 4);
218 if (ptr[1] < 11 + gtk_len ||
219 gtk_len < 5 || gtk_len > 32) {
220 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
224 wpa_wnmsleep_install_key(
226 WNM_SLEEP_SUBELEM_GTK,
229 #ifdef CONFIG_IEEE80211W
230 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
231 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
232 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
236 wpa_wnmsleep_install_key(wpa_s->wpa,
237 WNM_SLEEP_SUBELEM_IGTK, ptr);
238 ptr += 10 + WPA_IGTK_LEN;
239 #endif /* CONFIG_IEEE80211W */
241 break; /* skip the loop */
246 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
247 const u8 *frm, int len)
250 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
251 * WNM-Sleep Mode IE | TFS Response IE
253 const u8 *pos = frm; /* point to payload after the action field */
255 struct wnm_sleep_element *wnmsleep_ie = NULL;
256 /* multiple TFS Resp IE (assuming consecutive) */
257 const u8 *tfsresp_ie_start = NULL;
258 const u8 *tfsresp_ie_end = NULL;
261 if (!wpa_s->wnmsleep_used) {
262 wpa_printf(MSG_DEBUG,
263 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode operation has not been requested");
269 key_len_total = WPA_GET_LE16(frm + 1);
271 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
272 frm[0], key_len_total);
274 if (key_len_total > left) {
275 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
278 pos += 3 + key_len_total;
279 while (pos - frm + 1 < len) {
280 u8 ie_len = *(pos + 1);
281 if (2 + ie_len > frm + len - pos) {
282 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
285 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
286 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
287 wnmsleep_ie = (struct wnm_sleep_element *) pos;
288 else if (*pos == WLAN_EID_TFS_RESP) {
289 if (!tfsresp_ie_start)
290 tfsresp_ie_start = pos;
291 tfsresp_ie_end = pos;
293 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
298 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
302 wpa_s->wnmsleep_used = 0;
304 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
305 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
306 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
307 "frame (action=%d, intval=%d)",
308 wnmsleep_ie->action_type, wnmsleep_ie->intval);
309 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
310 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
312 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
313 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
316 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
317 "(action=%d, intval=%d)",
318 wnmsleep_ie->action_type, wnmsleep_ie->intval);
319 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
320 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
321 wpa_s->bssid, NULL, NULL);
322 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
323 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
324 wpa_s->bssid, NULL, NULL);
329 void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
333 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
334 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
335 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
338 wpa_s->wnm_num_neighbor_report = 0;
339 os_free(wpa_s->wnm_neighbor_report_elements);
340 wpa_s->wnm_neighbor_report_elements = NULL;
342 wpabuf_free(wpa_s->coloc_intf_elems);
343 wpa_s->coloc_intf_elems = NULL;
347 static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
348 u8 id, u8 elen, const u8 *pos)
351 case WNM_NEIGHBOR_TSF:
353 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
356 rep->tsf_offset = WPA_GET_LE16(pos);
357 rep->beacon_int = WPA_GET_LE16(pos + 2);
358 rep->tsf_present = 1;
360 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
362 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
366 os_memcpy(rep->country, pos, 2);
367 rep->country_present = 1;
369 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
371 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
375 rep->preference = pos[0];
376 rep->preference_present = 1;
378 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
379 rep->bss_term_tsf = WPA_GET_LE64(pos);
380 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
381 rep->bss_term_present = 1;
383 case WNM_NEIGHBOR_BEARING:
385 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
389 rep->bearing = WPA_GET_LE16(pos);
390 rep->distance = WPA_GET_LE32(pos + 2);
391 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
392 rep->bearing_present = 1;
394 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
396 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
400 os_free(rep->meas_pilot);
401 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
402 if (rep->meas_pilot == NULL)
404 rep->meas_pilot->measurement_pilot = pos[0];
405 rep->meas_pilot->subelem_len = elen - 1;
406 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
408 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
410 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
414 os_memcpy(rep->rm_capab, pos, 5);
415 rep->rm_capab_present = 1;
417 case WNM_NEIGHBOR_MULTIPLE_BSSID:
419 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
422 os_free(rep->mul_bssid);
423 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
424 if (rep->mul_bssid == NULL)
426 rep->mul_bssid->max_bssid_indicator = pos[0];
427 rep->mul_bssid->subelem_len = elen - 1;
428 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
434 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
436 struct wpa_bss *bss = wpa_s->current_bss;
437 const char *country = NULL;
441 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
443 if (elem && elem[1] >= 2)
444 country = (const char *) (elem + 2);
447 freq = ieee80211_chan_to_freq(country, op_class, chan);
448 if (freq <= 0 && op_class == 0) {
450 * Some APs do not advertise correct operating class
451 * information. Try to determine the most likely operating
452 * frequency based on the channel number.
454 if (chan >= 1 && chan <= 13)
455 freq = 2407 + chan * 5;
458 else if (chan >= 36 && chan <= 169)
459 freq = 5000 + chan * 5;
465 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
466 const u8 *pos, u8 len,
467 struct neighbor_report *rep)
472 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
476 os_memcpy(rep->bssid, pos, ETH_ALEN);
477 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
478 rep->regulatory_class = *(pos + 10);
479 rep->channel_number = *(pos + 11);
480 rep->phy_type = *(pos + 12);
490 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
493 wpa_printf(MSG_DEBUG,
494 "WNM: Truncated neighbor report subelement");
497 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
502 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
503 rep->channel_number);
507 static void wnm_clear_acceptable(struct wpa_supplicant *wpa_s)
511 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++)
512 wpa_s->wnm_neighbor_report_elements[i].acceptable = 0;
516 static struct wpa_bss * get_first_acceptable(struct wpa_supplicant *wpa_s)
519 struct neighbor_report *nei;
521 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
522 nei = &wpa_s->wnm_neighbor_report_elements[i];
524 return wpa_bss_get_bssid(wpa_s, nei->bssid);
532 static struct wpa_bss *
533 get_mbo_transition_candidate(struct wpa_supplicant *wpa_s,
534 enum mbo_transition_reject_reason *reason)
536 struct wpa_bss *target = NULL;
537 struct wpa_bss_trans_info params;
538 struct wpa_bss_candidate_info *info = NULL;
539 struct neighbor_report *nei = wpa_s->wnm_neighbor_report_elements;
540 u8 *first_candidate_bssid = NULL, *pos;
543 params.mbo_transition_reason = wpa_s->wnm_mbo_transition_reason;
544 params.n_candidates = 0;
545 params.bssid = os_calloc(wpa_s->wnm_num_neighbor_report, ETH_ALEN);
550 for (i = 0; i < wpa_s->wnm_num_neighbor_report; nei++, i++) {
552 first_candidate_bssid = nei->bssid;
553 if (!nei->acceptable)
555 os_memcpy(pos, nei->bssid, ETH_ALEN);
557 params.n_candidates++;
560 if (!params.n_candidates)
563 info = wpa_drv_get_bss_trans_status(wpa_s, ¶ms);
565 /* If failed to get candidate BSS transition status from driver,
566 * get the first acceptable candidate from wpa_supplicant.
568 target = wpa_bss_get_bssid(wpa_s, params.bssid);
572 /* Get the first acceptable candidate from driver */
573 for (i = 0; i < info->num; i++) {
574 if (info->candidates[i].is_accept) {
575 target = wpa_bss_get_bssid(wpa_s,
576 info->candidates[i].bssid);
581 /* If Disassociation Imminent is set and driver rejects all the
582 * candidate select first acceptable candidate which has
583 * rssi > disassoc_imminent_rssi_threshold
585 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
586 for (i = 0; i < info->num; i++) {
587 target = wpa_bss_get_bssid(wpa_s,
588 info->candidates[i].bssid);
591 wpa_s->conf->disassoc_imminent_rssi_threshold))
597 /* While sending BTM reject use reason code of the first candidate
598 * received in BTM request frame
601 for (i = 0; i < info->num; i++) {
602 if (first_candidate_bssid &&
603 os_memcmp(first_candidate_bssid,
604 info->candidates[i].bssid, ETH_ALEN) == 0)
606 *reason = info->candidates[i].reject_reason;
615 os_free(params.bssid);
617 os_free(info->candidates);
622 #endif /* CONFIG_MBO */
625 static struct wpa_bss *
626 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs,
627 enum mbo_transition_reject_reason *reason)
630 struct wpa_bss *bss = wpa_s->current_bss;
631 struct wpa_bss *target;
636 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
637 MAC2STR(wpa_s->bssid), bss->level);
639 wnm_clear_acceptable(wpa_s);
641 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
642 struct neighbor_report *nei;
644 nei = &wpa_s->wnm_neighbor_report_elements[i];
645 if (nei->preference_present && nei->preference == 0) {
646 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
647 MAC2STR(nei->bssid));
651 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
653 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
654 " (pref %d) not found in scan results",
656 nei->preference_present ? nei->preference :
662 struct os_reltime now;
664 if (os_get_reltime(&now) == 0 &&
665 os_reltime_expired(&now, &target->last_update,
667 wpa_printf(MSG_DEBUG,
668 "Candidate BSS is more than %ld seconds old",
674 if (bss->ssid_len != target->ssid_len ||
675 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
677 * TODO: Could consider allowing transition to another
678 * ESS if PMF was enabled for the association.
680 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
681 " (pref %d) in different ESS",
683 nei->preference_present ? nei->preference :
688 if (wpa_s->current_ssid &&
689 !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
691 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
692 " (pref %d) does not match the current network profile",
694 nei->preference_present ? nei->preference :
699 if (wpa_is_bss_tmp_disallowed(wpa_s, target->bssid)) {
700 wpa_printf(MSG_DEBUG,
701 "MBO: Candidate BSS " MACSTR
702 " retry delay is not over yet",
703 MAC2STR(nei->bssid));
707 if (target->level < bss->level && target->level < -80) {
708 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
709 " (pref %d) does not have sufficient signal level (%d)",
711 nei->preference_present ? nei->preference :
721 if (wpa_s->wnm_mbo_trans_reason_present)
722 target = get_mbo_transition_candidate(wpa_s, reason);
724 target = get_first_acceptable(wpa_s);
725 #else /* CONFIG_MBO */
726 target = get_first_acceptable(wpa_s);
727 #endif /* CONFIG_MBO */
730 wpa_printf(MSG_DEBUG,
731 "WNM: Found an acceptable preferred transition candidate BSS "
733 MAC2STR(target->bssid), target->level);
740 static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
742 const u8 *ie_a, *ie_b;
747 ie_a = wpa_bss_get_ie(a, eid);
748 ie_b = wpa_bss_get_ie(b, eid);
750 if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
753 return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
757 static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
761 info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
764 * Leave the security and key scope bits unset to indicate that the
765 * security information is not available.
768 if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
769 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
770 if (bss->caps & WLAN_CAPABILITY_QOS)
771 info |= NEI_REP_BSSID_INFO_QOS;
772 if (bss->caps & WLAN_CAPABILITY_APSD)
773 info |= NEI_REP_BSSID_INFO_APSD;
774 if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
775 info |= NEI_REP_BSSID_INFO_RM;
776 if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
777 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
778 if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
779 info |= NEI_REP_BSSID_INFO_IMM_BA;
780 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
781 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
782 if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
783 info |= NEI_REP_BSSID_INFO_HT;
789 static int wnm_add_nei_rep(struct wpabuf **buf, const u8 *bssid,
790 u32 bss_info, u8 op_class, u8 chan, u8 phy_type,
793 if (wpabuf_len(*buf) + 18 >
794 IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN) {
795 wpa_printf(MSG_DEBUG,
796 "WNM: No room in frame for Neighbor Report element");
800 if (wpabuf_resize(buf, 18) < 0) {
801 wpa_printf(MSG_DEBUG,
802 "WNM: Failed to allocate memory for Neighbor Report element");
806 wpabuf_put_u8(*buf, WLAN_EID_NEIGHBOR_REPORT);
807 /* length: 13 for basic neighbor report + 3 for preference subelement */
808 wpabuf_put_u8(*buf, 16);
809 wpabuf_put_data(*buf, bssid, ETH_ALEN);
810 wpabuf_put_le32(*buf, bss_info);
811 wpabuf_put_u8(*buf, op_class);
812 wpabuf_put_u8(*buf, chan);
813 wpabuf_put_u8(*buf, phy_type);
814 wpabuf_put_u8(*buf, WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE);
815 wpabuf_put_u8(*buf, 1);
816 wpabuf_put_u8(*buf, pref);
821 static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
822 struct wpa_bss *bss, struct wpabuf **buf,
827 int sec_chan = 0, vht = 0;
828 enum phy_type phy_type;
830 struct ieee80211_ht_operation *ht_oper = NULL;
831 struct ieee80211_vht_operation *vht_oper = NULL;
833 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
834 if (ie && ie[1] >= 2) {
835 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
837 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
839 else if (ht_oper->ht_param &
840 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
844 ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
845 if (ie && ie[1] >= 1) {
846 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
848 if (vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80MHZ ||
849 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_160MHZ ||
850 vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80P80MHZ)
851 vht = vht_oper->vht_op_info_chwidth;
854 if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
855 &chan) == NUM_HOSTAPD_MODES) {
856 wpa_printf(MSG_DEBUG,
857 "WNM: Cannot determine operating class and channel");
861 phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
863 if (phy_type == PHY_TYPE_UNSPECIFIED) {
864 wpa_printf(MSG_DEBUG,
865 "WNM: Cannot determine BSS phy type for Neighbor Report");
869 info = wnm_get_bss_info(wpa_s, bss);
871 return wnm_add_nei_rep(buf, bss->bssid, info, op_class, chan, phy_type,
876 static void wnm_add_cand_list(struct wpa_supplicant *wpa_s, struct wpabuf **buf)
878 unsigned int i, pref = 255;
879 struct os_reltime now;
880 struct wpa_ssid *ssid = wpa_s->current_ssid;
886 * TODO: Define when scan results are no longer valid for the candidate
889 os_get_reltime(&now);
890 if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
893 wpa_printf(MSG_DEBUG,
894 "WNM: Add candidate list to BSS Transition Management Response frame");
895 for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
896 struct wpa_bss *bss = wpa_s->last_scan_res[i];
899 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1, 0)) {
900 res = wnm_nei_rep_add_bss(wpa_s, bss, buf, pref--);
902 continue; /* could not build entry for BSS */
904 break; /* no more room for candidates */
910 wpa_hexdump_buf(MSG_DEBUG,
911 "WNM: BSS Transition Management Response candidate list",
916 #define BTM_RESP_MIN_SIZE 5 + ETH_ALEN
918 static void wnm_send_bss_transition_mgmt_resp(
919 struct wpa_supplicant *wpa_s, u8 dialog_token,
920 enum bss_trans_mgmt_status_code status,
921 enum mbo_transition_reject_reason reason,
922 u8 delay, const u8 *target_bssid)
927 wpa_printf(MSG_DEBUG,
928 "WNM: Send BSS Transition Management Response to " MACSTR
929 " dialog_token=%u status=%u reason=%u delay=%d",
930 MAC2STR(wpa_s->bssid), dialog_token, status, reason, delay);
931 if (!wpa_s->current_bss) {
932 wpa_printf(MSG_DEBUG,
933 "WNM: Current BSS not known - drop response");
937 buf = wpabuf_alloc(BTM_RESP_MIN_SIZE);
939 wpa_printf(MSG_DEBUG,
940 "WNM: Failed to allocate memory for BTM response");
944 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
945 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_RESP);
946 wpabuf_put_u8(buf, dialog_token);
947 wpabuf_put_u8(buf, status);
948 wpabuf_put_u8(buf, delay);
950 wpabuf_put_data(buf, target_bssid, ETH_ALEN);
951 } else if (status == WNM_BSS_TM_ACCEPT) {
953 * P802.11-REVmc clarifies that the Target BSSID field is always
954 * present when status code is zero, so use a fake value here if
955 * no BSSID is yet known.
957 wpabuf_put_data(buf, "\0\0\0\0\0\0", ETH_ALEN);
960 if (status == WNM_BSS_TM_ACCEPT)
961 wnm_add_cand_list(wpa_s, &buf);
964 if (status != WNM_BSS_TM_ACCEPT &&
965 wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) {
969 ret = wpas_mbo_ie_bss_trans_reject(wpa_s, mbo, sizeof(mbo),
972 if (wpabuf_resize(&buf, ret) < 0) {
974 wpa_printf(MSG_DEBUG,
975 "WNM: Failed to allocate memory for MBO IE");
979 wpabuf_put_data(buf, mbo, ret);
982 #endif /* CONFIG_MBO */
984 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
985 wpa_s->own_addr, wpa_s->bssid,
986 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
988 wpa_printf(MSG_DEBUG,
989 "WNM: Failed to send BSS Transition Management Response");
996 static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
997 struct wpa_bss *bss, struct wpa_ssid *ssid,
1000 wpa_dbg(wpa_s, MSG_DEBUG,
1001 "WNM: Transition to BSS " MACSTR
1002 " based on BSS Transition Management Request (old BSSID "
1003 MACSTR " after_new_scan=%d)",
1004 MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan);
1006 /* Send the BSS Management Response - Accept */
1007 if (wpa_s->wnm_reply) {
1008 wpa_s->wnm_reply = 0;
1009 wpa_printf(MSG_DEBUG,
1010 "WNM: Sending successful BSS Transition Management Response");
1011 wnm_send_bss_transition_mgmt_resp(
1012 wpa_s, wpa_s->wnm_dialog_token, WNM_BSS_TM_ACCEPT,
1013 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1017 if (bss == wpa_s->current_bss) {
1018 wpa_printf(MSG_DEBUG,
1019 "WNM: Already associated with the preferred candidate");
1020 wnm_deallocate_memory(wpa_s);
1024 wpa_s->reassociate = 1;
1025 wpa_printf(MSG_DEBUG, "WNM: Issuing connect");
1026 wpa_supplicant_connect(wpa_s, bss, ssid);
1027 wnm_deallocate_memory(wpa_s);
1031 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
1033 struct wpa_bss *bss;
1034 struct wpa_ssid *ssid = wpa_s->current_ssid;
1035 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1036 enum mbo_transition_reject_reason reason =
1037 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED;
1039 if (!wpa_s->wnm_neighbor_report_elements)
1042 wpa_dbg(wpa_s, MSG_DEBUG,
1043 "WNM: Process scan results for BSS Transition Management");
1044 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
1045 &wpa_s->scan_trigger_time)) {
1046 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
1047 wnm_deallocate_memory(wpa_s);
1051 if (!wpa_s->current_bss ||
1052 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
1054 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
1058 /* Compare the Neighbor Report and scan results */
1059 bss = compare_scan_neighbor_results(wpa_s, 0, &reason);
1061 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
1062 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
1063 goto send_bss_resp_fail;
1066 /* Associate to the network */
1067 wnm_bss_tm_connect(wpa_s, bss, ssid, 1);
1074 /* Send reject response for all the failures */
1076 if (wpa_s->wnm_reply) {
1077 wpa_s->wnm_reply = 0;
1078 wnm_send_bss_transition_mgmt_resp(wpa_s,
1079 wpa_s->wnm_dialog_token,
1080 status, reason, 0, NULL);
1082 wnm_deallocate_memory(wpa_s);
1088 static int cand_pref_compar(const void *a, const void *b)
1090 const struct neighbor_report *aa = a;
1091 const struct neighbor_report *bb = b;
1093 if (!aa->preference_present && !bb->preference_present)
1095 if (!aa->preference_present)
1097 if (!bb->preference_present)
1099 if (bb->preference > aa->preference)
1101 if (bb->preference < aa->preference)
1107 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
1109 if (!wpa_s->wnm_neighbor_report_elements)
1111 qsort(wpa_s->wnm_neighbor_report_elements,
1112 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
1117 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
1121 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
1122 if (!wpa_s->wnm_neighbor_report_elements)
1124 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1125 struct neighbor_report *nei;
1127 nei = &wpa_s->wnm_neighbor_report_elements[i];
1128 wpa_printf(MSG_DEBUG, "%u: " MACSTR
1129 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
1130 i, MAC2STR(nei->bssid), nei->bssid_info,
1131 nei->regulatory_class,
1132 nei->channel_number, nei->phy_type,
1133 nei->preference_present ? nei->preference : -1,
1139 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
1143 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1144 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
1147 for (j = 0; j < mode->num_channels; j++) {
1148 struct hostapd_channel_data *chan;
1150 chan = &mode->channels[j];
1151 if (chan->freq == freq &&
1152 !(chan->flag & HOSTAPD_CHAN_DISABLED))
1161 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
1167 if (!wpa_s->wnm_neighbor_report_elements)
1170 if (wpa_s->hw.modes == NULL)
1173 os_free(wpa_s->next_scan_freqs);
1174 wpa_s->next_scan_freqs = NULL;
1176 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
1180 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1181 struct neighbor_report *nei;
1183 nei = &wpa_s->wnm_neighbor_report_elements[i];
1184 if (nei->freq <= 0) {
1185 wpa_printf(MSG_DEBUG,
1186 "WNM: Unknown neighbor operating frequency for "
1187 MACSTR " - scan all channels",
1188 MAC2STR(nei->bssid));
1192 if (chan_supported(wpa_s, nei->freq))
1193 add_freq(freqs, &num_freqs, nei->freq);
1196 if (num_freqs == 0) {
1201 wpa_printf(MSG_DEBUG,
1202 "WNM: Scan %d frequencies based on transition candidate list",
1204 wpa_s->next_scan_freqs = freqs;
1208 static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
1210 struct wpa_scan_results *scan_res;
1211 struct wpa_bss *bss;
1212 struct wpa_ssid *ssid = wpa_s->current_ssid;
1216 wpa_dbg(wpa_s, MSG_DEBUG,
1217 "WNM: Fetch current scan results from the driver for checking transition candidates");
1218 scan_res = wpa_drv_get_scan_results2(wpa_s);
1220 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
1224 if (scan_res->fetch_time.sec == 0)
1225 os_get_reltime(&scan_res->fetch_time);
1227 filter_scan_res(wpa_s, scan_res);
1229 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1230 struct neighbor_report *nei;
1232 nei = &wpa_s->wnm_neighbor_report_elements[i];
1233 if (nei->preference_present && nei->preference == 0)
1236 for (j = 0; j < scan_res->num; j++) {
1237 struct wpa_scan_res *res;
1240 res = scan_res->res[j];
1241 if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
1242 res->age > WNM_SCAN_RESULT_AGE * 1000)
1244 bss = wpa_s->current_bss;
1245 ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
1246 if (bss && ssid_ie &&
1247 (bss->ssid_len != ssid_ie[1] ||
1248 os_memcmp(bss->ssid, ssid_ie + 2,
1249 bss->ssid_len) != 0))
1252 /* Potential candidate found */
1255 scan_est_throughput(wpa_s, res);
1256 wpa_bss_update_scan_res(wpa_s, res,
1257 &scan_res->fetch_time);
1261 wpa_scan_results_free(scan_res);
1263 wpa_dbg(wpa_s, MSG_DEBUG,
1264 "WNM: No transition candidate matches existing scan results");
1268 bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL);
1270 wpa_dbg(wpa_s, MSG_DEBUG,
1271 "WNM: Comparison of scan results against transition candidates did not find matches");
1275 /* Associate to the network */
1276 wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
1281 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1282 const u8 *pos, const u8 *end,
1285 unsigned int beacon_int;
1289 #endif /* CONFIG_MBO */
1295 wpa_s->wnm_mbo_trans_reason_present = 0;
1296 wpa_s->wnm_mbo_transition_reason = 0;
1297 #endif /* CONFIG_MBO */
1299 if (wpa_s->current_bss)
1300 beacon_int = wpa_s->current_bss->beacon_int;
1302 beacon_int = 100; /* best guess */
1304 wpa_s->wnm_dialog_token = pos[0];
1305 wpa_s->wnm_mode = pos[1];
1306 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
1308 wpa_s->wnm_reply = reply;
1310 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1311 "dialog_token=%u request_mode=0x%x "
1312 "disassoc_timer=%u validity_interval=%u",
1313 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
1314 wpa_s->wnm_dissoc_timer, valid_int);
1316 #if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS)
1317 if (wpa_s->reject_btm_req_reason) {
1318 wpa_printf(MSG_INFO,
1319 "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d",
1320 wpa_s->reject_btm_req_reason);
1321 wnm_send_bss_transition_mgmt_resp(
1322 wpa_s, wpa_s->wnm_dialog_token,
1323 wpa_s->reject_btm_req_reason,
1324 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1327 #endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */
1331 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
1332 if (end - pos < 12) {
1333 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1336 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
1337 pos += 12; /* BSS Termination Duration */
1340 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
1343 if (end - pos < 1 || 1 + pos[0] > end - pos) {
1344 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1345 "Management Request (URL)");
1348 os_memcpy(url, pos + 1, pos[0]);
1352 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1353 wpa_sm_pmf_enabled(wpa_s->wpa),
1354 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
1357 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
1358 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
1359 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1360 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
1361 /* TODO: mark current BSS less preferred for
1363 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1364 wpa_supplicant_req_scan(wpa_s, 0, 0);
1369 vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
1371 wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
1372 #endif /* CONFIG_MBO */
1374 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
1375 unsigned int valid_ms;
1377 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
1378 wnm_deallocate_memory(wpa_s);
1379 wpa_s->wnm_neighbor_report_elements = os_calloc(
1380 WNM_MAX_NEIGHBOR_REPORT,
1381 sizeof(struct neighbor_report));
1382 if (wpa_s->wnm_neighbor_report_elements == NULL)
1385 while (end - pos >= 2 &&
1386 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1391 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1393 if (len > end - pos) {
1394 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1397 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1398 struct neighbor_report *rep;
1399 rep = &wpa_s->wnm_neighbor_report_elements[
1400 wpa_s->wnm_num_neighbor_report];
1401 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
1402 wpa_s->wnm_num_neighbor_report++;
1404 if (wpa_s->wnm_mbo_trans_reason_present &&
1405 wpa_s->wnm_num_neighbor_report == 1) {
1407 wpa_printf(MSG_DEBUG,
1408 "WNM: First transition candidate is "
1409 MACSTR, MAC2STR(rep->bssid));
1411 #endif /* CONFIG_MBO */
1417 if (!wpa_s->wnm_num_neighbor_report) {
1418 wpa_printf(MSG_DEBUG,
1419 "WNM: Candidate list included bit is set, but no candidates found");
1420 wnm_send_bss_transition_mgmt_resp(
1421 wpa_s, wpa_s->wnm_dialog_token,
1422 WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
1423 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1428 wnm_sort_cand_list(wpa_s);
1429 wnm_dump_cand_list(wpa_s);
1430 valid_ms = valid_int * beacon_int * 128 / 125;
1431 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1433 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1434 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1435 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1436 wpa_s->wnm_cand_valid_until.sec +=
1437 wpa_s->wnm_cand_valid_until.usec / 1000000;
1438 wpa_s->wnm_cand_valid_until.usec %= 1000000;
1439 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
1442 * Fetch the latest scan results from the kernel and check for
1443 * candidates based on those results first. This can help in
1444 * finding more up-to-date information should the driver has
1445 * done some internal scanning operations after the last scan
1446 * result update in wpa_supplicant.
1448 if (wnm_fetch_scan_results(wpa_s) > 0)
1452 * Try to use previously received scan results, if they are
1453 * recent enough to use for a connection.
1455 if (wpa_s->last_scan_res_used > 0) {
1456 struct os_reltime now;
1458 os_get_reltime(&now);
1459 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1460 wpa_printf(MSG_DEBUG,
1461 "WNM: Try to use recent scan results");
1462 if (wnm_scan_process(wpa_s, 0) > 0)
1464 wpa_printf(MSG_DEBUG,
1465 "WNM: No match in previous scan results - try a new scan");
1469 wnm_set_scan_freqs(wpa_s);
1470 if (wpa_s->wnm_num_neighbor_report == 1) {
1471 os_memcpy(wpa_s->next_scan_bssid,
1472 wpa_s->wnm_neighbor_report_elements[0].bssid,
1474 wpa_printf(MSG_DEBUG,
1475 "WNM: Scan only for a specific BSSID since there is only a single candidate "
1476 MACSTR, MAC2STR(wpa_s->next_scan_bssid));
1478 wpa_supplicant_req_scan(wpa_s, 0, 0);
1480 enum bss_trans_mgmt_status_code status;
1481 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1482 status = WNM_BSS_TM_ACCEPT;
1484 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1485 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1487 wnm_send_bss_transition_mgmt_resp(
1488 wpa_s, wpa_s->wnm_dialog_token, status,
1489 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1494 #define BTM_QUERY_MIN_SIZE 4
1496 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
1498 const char *btm_candidates,
1504 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
1505 MACSTR " query_reason=%u%s",
1506 MAC2STR(wpa_s->bssid), query_reason,
1507 cand_list ? " candidate list" : "");
1509 buf = wpabuf_alloc(BTM_QUERY_MIN_SIZE);
1513 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1514 wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_QUERY);
1515 wpabuf_put_u8(buf, 1);
1516 wpabuf_put_u8(buf, query_reason);
1519 wnm_add_cand_list(wpa_s, &buf);
1521 if (btm_candidates) {
1522 const size_t max_len = 1000;
1524 ret = wpabuf_resize(&buf, max_len);
1530 ret = ieee802_11_parse_candidate_list(btm_candidates,
1538 wpabuf_put(buf, ret);
1541 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1542 wpa_s->own_addr, wpa_s->bssid,
1543 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1550 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1551 const u8 *sa, const u8 *data,
1554 const u8 *pos, *end, *next;
1560 while (end - pos > 1) {
1563 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1565 if (ie_len > end - pos) {
1566 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1570 next = pos + ie_len;
1575 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1576 WPA_GET_BE24(pos), pos[3]);
1579 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1580 WPA_GET_BE24(pos) == OUI_WFA &&
1581 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1582 /* Subscription Remediation subelement */
1588 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1590 ie_end = pos + ie_len;
1594 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1598 if (url_len + 1 > ie_end - pos) {
1599 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1601 (int) (ie_end - pos));
1604 url = os_malloc(url_len + 1);
1607 os_memcpy(url, pos, url_len);
1608 url[url_len] = '\0';
1609 osu_method = pos[url_len];
1611 hs20_rx_subscription_remediation(wpa_s, url,
1618 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1619 WPA_GET_BE24(pos) == OUI_WFA &&
1620 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1627 ie_end = pos + ie_len;
1630 reauth_delay = WPA_GET_LE16(pos);
1633 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1634 "Imminent - Reason Code %u "
1635 "Re-Auth Delay %u URL Length %u",
1636 code, reauth_delay, url_len);
1637 if (url_len > ie_end - pos)
1639 url = os_malloc(url_len + 1);
1642 os_memcpy(url, pos, url_len);
1643 url[url_len] = '\0';
1644 hs20_rx_deauth_imminent_notice(wpa_s, code,
1651 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1652 WPA_GET_BE24(pos) == OUI_WFA &&
1653 pos[3] == HS20_WNM_T_C_ACCEPTANCE) {
1658 ie_end = pos + ie_len;
1661 wpa_printf(MSG_DEBUG,
1662 "WNM: HS 2.0 Terms and Conditions Acceptance (URL Length %u)",
1664 if (url_len > ie_end - pos)
1666 url = os_malloc(url_len + 1);
1669 os_memcpy(url, pos, url_len);
1670 url[url_len] = '\0';
1671 hs20_rx_t_c_acceptance(wpa_s, url);
1676 #endif /* CONFIG_HS20 */
1683 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1684 const u8 *sa, const u8 *frm, int len)
1686 const u8 *pos, *end;
1687 u8 dialog_token, type;
1689 /* Dialog Token [1] | Type [1] | Subelements */
1691 if (len < 2 || sa == NULL)
1695 dialog_token = *pos++;
1698 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1699 "(dialog_token %u type %u sa " MACSTR ")",
1700 dialog_token, type, MAC2STR(sa));
1701 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1704 if (wpa_s->wpa_state != WPA_COMPLETED ||
1705 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1706 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1707 "from our AP - ignore it");
1713 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1716 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1717 "WNM-Notification type %u", type);
1723 static void ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant *wpa_s,
1724 const u8 *sa, const u8 *frm,
1727 u8 dialog_token, req_info, auto_report, timeout;
1729 if (!wpa_s->conf->coloc_intf_reporting)
1732 /* Dialog Token [1] | Request Info [1] */
1736 dialog_token = frm[0];
1738 auto_report = req_info & 0x03;
1739 timeout = req_info >> 2;
1741 wpa_dbg(wpa_s, MSG_DEBUG,
1742 "WNM: Received Collocated Interference Request (dialog_token %u auto_report %u timeout %u sa " MACSTR ")",
1743 dialog_token, auto_report, timeout, MAC2STR(sa));
1745 if (dialog_token == 0)
1746 return; /* only nonzero values are used for request */
1748 if (wpa_s->wpa_state != WPA_COMPLETED ||
1749 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1750 wpa_dbg(wpa_s, MSG_DEBUG,
1751 "WNM: Collocated Interference Request frame not from current AP - ignore it");
1755 wpa_msg(wpa_s, MSG_INFO, COLOC_INTF_REQ "%u %u %u",
1756 dialog_token, auto_report, timeout);
1757 wpa_s->coloc_intf_dialog_token = dialog_token;
1758 wpa_s->coloc_intf_auto_report = auto_report;
1759 wpa_s->coloc_intf_timeout = timeout;
1763 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1764 const struct ieee80211_mgmt *mgmt, size_t len)
1766 const u8 *pos, *end;
1769 if (len < IEEE80211_HDRLEN + 2)
1772 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1774 end = ((const u8 *) mgmt) + len;
1776 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1777 act, MAC2STR(mgmt->sa));
1778 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1779 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1780 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1786 case WNM_BSS_TRANS_MGMT_REQ:
1787 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1788 !(mgmt->da[0] & 0x01));
1790 case WNM_SLEEP_MODE_RESP:
1791 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1793 case WNM_NOTIFICATION_REQ:
1794 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1796 case WNM_COLLOCATED_INTERFERENCE_REQ:
1797 ieee802_11_rx_wnm_coloc_intf_req(wpa_s, mgmt->sa, pos,
1801 wpa_printf(MSG_ERROR, "WNM: Unknown request");
1807 int wnm_send_coloc_intf_report(struct wpa_supplicant *wpa_s, u8 dialog_token,
1808 const struct wpabuf *elems)
1813 if (wpa_s->wpa_state < WPA_ASSOCIATED || !elems)
1816 wpa_printf(MSG_DEBUG, "WNM: Send Collocated Interference Report to "
1817 MACSTR " (dialog token %u)",
1818 MAC2STR(wpa_s->bssid), dialog_token);
1820 buf = wpabuf_alloc(3 + wpabuf_len(elems));
1824 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1825 wpabuf_put_u8(buf, WNM_COLLOCATED_INTERFERENCE_REPORT);
1826 wpabuf_put_u8(buf, dialog_token);
1827 wpabuf_put_buf(buf, elems);
1829 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1830 wpa_s->own_addr, wpa_s->bssid,
1831 wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1837 void wnm_set_coloc_intf_elems(struct wpa_supplicant *wpa_s,
1838 struct wpabuf *elems)
1840 wpabuf_free(wpa_s->coloc_intf_elems);
1841 if (elems && wpabuf_len(elems) == 0) {
1845 wpa_s->coloc_intf_elems = elems;
1847 if (wpa_s->conf->coloc_intf_reporting && wpa_s->coloc_intf_elems &&
1848 wpa_s->coloc_intf_dialog_token &&
1849 (wpa_s->coloc_intf_auto_report == 1 ||
1850 wpa_s->coloc_intf_auto_report == 3)) {
1851 /* TODO: Check that there has not been less than
1852 * wpa_s->coloc_intf_timeout * 200 TU from the last report.
1854 wnm_send_coloc_intf_report(wpa_s,
1855 wpa_s->coloc_intf_dialog_token,
1856 wpa_s->coloc_intf_elems);
1861 void wnm_clear_coloc_intf_reporting(struct wpa_supplicant *wpa_s)
1864 wpa_s->coloc_intf_dialog_token = 0;
1865 wpa_s->coloc_intf_auto_report = 0;
1866 #endif /* CONFIG_WNM */