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"
16 #include "wpa_supplicant_i.h"
19 #include "ctrl_iface.h"
22 #include "hs20_supplicant.h"
24 #define MAX_TFS_IE_LEN 1024
25 #define WNM_MAX_NEIGHBOR_REPORT 10
28 /* get the TFS IE from driver */
29 static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
30 u16 *buf_len, enum wnm_oper oper)
32 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
34 return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
38 /* set the TFS IE to driver */
39 static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
40 const u8 *addr, u8 *buf, u16 *buf_len,
43 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
45 return wpa_drv_wnm_oper(wpa_s, oper, addr, buf, buf_len);
49 /* MLME-SLEEPMODE.request */
50 int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
51 u8 action, u16 intval, struct wpabuf *tfs_req)
53 struct ieee80211_mgmt *mgmt;
56 struct wnm_sleep_element *wnmsleep_ie;
59 u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
60 enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
61 WNM_SLEEP_TFS_REQ_IE_NONE;
63 wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
64 "action=%s to " MACSTR,
65 action == 0 ? "enter" : "exit",
66 MAC2STR(wpa_s->bssid));
68 /* WNM-Sleep Mode IE */
69 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
70 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
71 if (wnmsleep_ie == NULL)
73 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
74 wnmsleep_ie->len = wnmsleep_ie_len - 2;
75 wnmsleep_ie->action_type = action;
76 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
77 wnmsleep_ie->intval = host_to_le16(intval);
78 wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
79 (u8 *) wnmsleep_ie, wnmsleep_ie_len);
83 wnmtfs_ie_len = wpabuf_len(tfs_req);
84 wnmtfs_ie = os_malloc(wnmtfs_ie_len);
85 if (wnmtfs_ie == NULL) {
89 os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
91 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
92 if (wnmtfs_ie == NULL) {
96 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
103 wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
104 (u8 *) wnmtfs_ie, wnmtfs_ie_len);
106 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
108 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
109 "WNM-Sleep Request action frame");
110 os_free(wnmsleep_ie);
115 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
116 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
117 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
118 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
119 WLAN_FC_STYPE_ACTION);
120 mgmt->u.action.category = WLAN_ACTION_WNM;
121 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
122 mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
123 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
125 /* copy TFS IE here */
126 if (wnmtfs_ie_len > 0) {
127 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
128 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
131 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
134 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
135 wpa_s->own_addr, wpa_s->bssid,
136 &mgmt->u.action.category, len, 0);
138 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
139 "(action=%d, intval=%d)", action, intval);
141 wpa_s->wnmsleep_used = 1;
143 os_free(wnmsleep_ie);
151 static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
152 u8 *tfsresp_ie_start,
155 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
156 wpa_s->bssid, NULL, NULL);
157 /* remove GTK/IGTK ?? */
159 /* set the TFS Resp IE(s) */
160 if (tfsresp_ie_start && tfsresp_ie_end &&
161 tfsresp_ie_end - tfsresp_ie_start >= 0) {
163 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
165 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
166 /* pass the TFS Resp IE(s) to driver for processing */
167 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
170 WNM_SLEEP_TFS_RESP_IE_SET))
171 wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
176 static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
177 const u8 *frm, u16 key_len_total)
182 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
185 /* Install GTK/IGTK */
187 /* point to key data field */
188 ptr = (u8 *) frm + 1 + 2;
189 end = ptr + key_len_total;
190 wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
192 if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
193 wpa_msg(wpa_s, MSG_INFO,
194 "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
198 while (ptr + 1 < end) {
199 if (ptr + 2 + ptr[1] > end) {
200 wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
203 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
208 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
209 if (ptr[1] < 11 + 5) {
210 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
214 gtk_len = *(ptr + 4);
215 if (ptr[1] < 11 + gtk_len ||
216 gtk_len < 5 || gtk_len > 32) {
217 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
221 wpa_wnmsleep_install_key(
223 WNM_SLEEP_SUBELEM_GTK,
226 #ifdef CONFIG_IEEE80211W
227 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
228 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
229 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
233 wpa_wnmsleep_install_key(wpa_s->wpa,
234 WNM_SLEEP_SUBELEM_IGTK, ptr);
235 ptr += 10 + WPA_IGTK_LEN;
236 #endif /* CONFIG_IEEE80211W */
238 break; /* skip the loop */
243 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
244 const u8 *frm, int len)
247 * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
248 * WNM-Sleep Mode IE | TFS Response IE
250 u8 *pos = (u8 *) frm; /* point to payload after the action field */
252 struct wnm_sleep_element *wnmsleep_ie = NULL;
253 /* multiple TFS Resp IE (assuming consecutive) */
254 u8 *tfsresp_ie_start = NULL;
255 u8 *tfsresp_ie_end = NULL;
258 if (!wpa_s->wnmsleep_used) {
259 wpa_printf(MSG_DEBUG,
260 "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode operation has not been requested");
266 key_len_total = WPA_GET_LE16(frm + 1);
268 wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
269 frm[0], key_len_total);
271 if (key_len_total > left) {
272 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
275 pos += 3 + key_len_total;
276 while (pos - frm < len) {
277 u8 ie_len = *(pos + 1);
278 if (pos + 2 + ie_len > frm + len) {
279 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
282 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
283 if (*pos == WLAN_EID_WNMSLEEP)
284 wnmsleep_ie = (struct wnm_sleep_element *) pos;
285 else if (*pos == WLAN_EID_TFS_RESP) {
286 if (!tfsresp_ie_start)
287 tfsresp_ie_start = pos;
288 tfsresp_ie_end = pos;
290 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
295 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
299 wpa_s->wnmsleep_used = 0;
301 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
302 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
303 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
304 "frame (action=%d, intval=%d)",
305 wnmsleep_ie->action_type, wnmsleep_ie->intval);
306 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
307 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
309 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
310 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
313 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
314 "(action=%d, intval=%d)",
315 wnmsleep_ie->action_type, wnmsleep_ie->intval);
316 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
317 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
318 wpa_s->bssid, NULL, NULL);
319 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
320 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
321 wpa_s->bssid, NULL, NULL);
326 void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
330 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
331 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
332 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
335 wpa_s->wnm_num_neighbor_report = 0;
336 os_free(wpa_s->wnm_neighbor_report_elements);
337 wpa_s->wnm_neighbor_report_elements = NULL;
341 static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
342 u8 id, u8 elen, const u8 *pos)
345 case WNM_NEIGHBOR_TSF:
347 wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
350 rep->tsf_offset = WPA_GET_LE16(pos);
351 rep->beacon_int = WPA_GET_LE16(pos + 2);
352 rep->tsf_present = 1;
354 case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
356 wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
360 os_memcpy(rep->country, pos, 2);
361 rep->country_present = 1;
363 case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
365 wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
369 rep->preference = pos[0];
370 rep->preference_present = 1;
372 case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
373 rep->bss_term_tsf = WPA_GET_LE64(pos);
374 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
375 rep->bss_term_present = 1;
377 case WNM_NEIGHBOR_BEARING:
379 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
383 rep->bearing = WPA_GET_LE16(pos);
384 rep->distance = WPA_GET_LE32(pos + 2);
385 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
386 rep->bearing_present = 1;
388 case WNM_NEIGHBOR_MEASUREMENT_PILOT:
390 wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
394 os_free(rep->meas_pilot);
395 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
396 if (rep->meas_pilot == NULL)
398 rep->meas_pilot->measurement_pilot = pos[0];
399 rep->meas_pilot->subelem_len = elen - 1;
400 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
402 case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
404 wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
408 os_memcpy(rep->rm_capab, pos, 5);
409 rep->rm_capab_present = 1;
411 case WNM_NEIGHBOR_MULTIPLE_BSSID:
413 wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
416 os_free(rep->mul_bssid);
417 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
418 if (rep->mul_bssid == NULL)
420 rep->mul_bssid->max_bssid_indicator = pos[0];
421 rep->mul_bssid->subelem_len = elen - 1;
422 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
428 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
430 struct wpa_bss *bss = wpa_s->current_bss;
431 const char *country = NULL;
434 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
436 if (elem && elem[1] >= 2)
437 country = (const char *) (elem + 2);
440 return ieee80211_chan_to_freq(country, op_class, chan);
444 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
445 const u8 *pos, u8 len,
446 struct neighbor_report *rep)
451 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
455 os_memcpy(rep->bssid, pos, ETH_ALEN);
456 rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
457 rep->regulatory_class = *(pos + 10);
458 rep->channel_number = *(pos + 11);
459 rep->phy_type = *(pos + 12);
469 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
472 wpa_printf(MSG_DEBUG,
473 "WNM: Truncated neighbor report subelement");
476 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
481 rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
482 rep->channel_number);
486 static struct wpa_bss *
487 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s)
491 struct wpa_bss *bss = wpa_s->current_bss;
492 struct wpa_bss *target;
497 wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
498 MAC2STR(wpa_s->bssid), bss->level);
500 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
501 struct neighbor_report *nei;
503 nei = &wpa_s->wnm_neighbor_report_elements[i];
504 if (nei->preference_present && nei->preference == 0) {
505 wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
506 MAC2STR(nei->bssid));
510 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
512 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
513 " (pref %d) not found in scan results",
515 nei->preference_present ? nei->preference :
520 if (bss->ssid_len != target->ssid_len ||
521 os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
523 * TODO: Could consider allowing transition to another
524 * ESS if PMF was enabled for the association.
526 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
527 " (pref %d) in different ESS",
529 nei->preference_present ? nei->preference :
534 if (target->level < bss->level && target->level < -80) {
535 wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
536 " (pref %d) does not have sufficient signal level (%d)",
538 nei->preference_present ? nei->preference :
544 wpa_printf(MSG_DEBUG,
545 "WNM: Found an acceptable preferred transition candidate BSS "
547 MAC2STR(nei->bssid), target->level);
555 static void wnm_send_bss_transition_mgmt_resp(
556 struct wpa_supplicant *wpa_s, u8 dialog_token,
557 enum bss_trans_mgmt_status_code status, u8 delay,
558 const u8 *target_bssid)
561 struct ieee80211_mgmt *mgmt;
565 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
566 "to " MACSTR " dialog_token=%u status=%u delay=%d",
567 MAC2STR(wpa_s->bssid), dialog_token, status, delay);
568 if (!wpa_s->current_bss) {
569 wpa_printf(MSG_DEBUG,
570 "WNM: Current BSS not known - drop response");
574 mgmt = (struct ieee80211_mgmt *) buf;
575 os_memset(&buf, 0, sizeof(buf));
576 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
577 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
578 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
579 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
580 WLAN_FC_STYPE_ACTION);
581 mgmt->u.action.category = WLAN_ACTION_WNM;
582 mgmt->u.action.u.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
583 mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
584 mgmt->u.action.u.bss_tm_resp.status_code = status;
585 mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
586 pos = mgmt->u.action.u.bss_tm_resp.variable;
588 os_memcpy(pos, target_bssid, ETH_ALEN);
590 } else if (status == WNM_BSS_TM_ACCEPT) {
592 * P802.11-REVmc clarifies that the Target BSSID field is always
593 * present when status code is zero, so use a fake value here if
594 * no BSSID is yet known.
596 os_memset(pos, 0, ETH_ALEN);
600 len = pos - (u8 *) &mgmt->u.action.category;
602 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
603 wpa_s->own_addr, wpa_s->bssid,
604 &mgmt->u.action.category, len, 0);
606 wpa_printf(MSG_DEBUG,
607 "WNM: Failed to send BSS Transition Management Response");
612 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
615 struct wpa_ssid *ssid = wpa_s->current_ssid;
616 enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
618 if (!wpa_s->wnm_neighbor_report_elements)
621 if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
622 &wpa_s->scan_trigger_time)) {
623 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
624 wnm_deallocate_memory(wpa_s);
628 if (!wpa_s->current_bss ||
629 os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
631 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
635 /* Compare the Neighbor Report and scan results */
636 bss = compare_scan_neighbor_results(wpa_s);
638 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
639 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
640 goto send_bss_resp_fail;
643 /* Associate to the network */
644 /* Send the BSS Management Response - Accept */
645 if (wpa_s->wnm_reply) {
646 wpa_s->wnm_reply = 0;
647 wnm_send_bss_transition_mgmt_resp(wpa_s,
648 wpa_s->wnm_dialog_token,
653 if (bss == wpa_s->current_bss) {
654 wpa_printf(MSG_DEBUG,
655 "WNM: Already associated with the preferred candidate");
659 wpa_s->reassociate = 1;
660 wpa_supplicant_connect(wpa_s, bss, ssid);
661 wnm_deallocate_memory(wpa_s);
668 /* Send reject response for all the failures */
670 if (wpa_s->wnm_reply) {
671 wpa_s->wnm_reply = 0;
672 wnm_send_bss_transition_mgmt_resp(wpa_s,
673 wpa_s->wnm_dialog_token,
676 wnm_deallocate_memory(wpa_s);
682 static int cand_pref_compar(const void *a, const void *b)
684 const struct neighbor_report *aa = a;
685 const struct neighbor_report *bb = b;
687 if (!aa->preference_present && !bb->preference_present)
689 if (!aa->preference_present)
691 if (!bb->preference_present)
693 if (bb->preference > aa->preference)
695 if (bb->preference < aa->preference)
701 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
703 if (!wpa_s->wnm_neighbor_report_elements)
705 qsort(wpa_s->wnm_neighbor_report_elements,
706 wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
711 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
715 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
716 if (!wpa_s->wnm_neighbor_report_elements)
718 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
719 struct neighbor_report *nei;
721 nei = &wpa_s->wnm_neighbor_report_elements[i];
722 wpa_printf(MSG_DEBUG, "%u: " MACSTR
723 " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
724 i, MAC2STR(nei->bssid), nei->bssid_info,
725 nei->regulatory_class,
726 nei->channel_number, nei->phy_type,
727 nei->preference_present ? nei->preference : -1,
733 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
737 for (i = 0; i < wpa_s->hw.num_modes; i++) {
738 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
741 for (j = 0; j < mode->num_channels; j++) {
742 struct hostapd_channel_data *chan;
744 chan = &mode->channels[j];
745 if (chan->freq == freq &&
746 !(chan->flag & HOSTAPD_CHAN_DISABLED))
755 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
761 if (!wpa_s->wnm_neighbor_report_elements)
764 if (wpa_s->hw.modes == NULL)
767 os_free(wpa_s->next_scan_freqs);
768 wpa_s->next_scan_freqs = NULL;
770 freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
774 for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
775 struct neighbor_report *nei;
777 nei = &wpa_s->wnm_neighbor_report_elements[i];
778 if (nei->freq <= 0) {
779 wpa_printf(MSG_DEBUG,
780 "WNM: Unknown neighbor operating frequency for "
781 MACSTR " - scan all channels",
782 MAC2STR(nei->bssid));
786 if (chan_supported(wpa_s, nei->freq))
787 add_freq(freqs, &num_freqs, nei->freq);
790 if (num_freqs == 0) {
795 wpa_printf(MSG_DEBUG,
796 "WNM: Scan %d frequencies based on transition candidate list",
798 wpa_s->next_scan_freqs = freqs;
802 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
803 const u8 *pos, const u8 *end,
806 unsigned int beacon_int;
812 if (wpa_s->current_bss)
813 beacon_int = wpa_s->current_bss->beacon_int;
815 beacon_int = 100; /* best guess */
817 wpa_s->wnm_dialog_token = pos[0];
818 wpa_s->wnm_mode = pos[1];
819 wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
821 wpa_s->wnm_reply = reply;
823 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
824 "dialog_token=%u request_mode=0x%x "
825 "disassoc_timer=%u validity_interval=%u",
826 wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
827 wpa_s->wnm_dissoc_timer, valid_int);
831 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
832 if (pos + 12 > end) {
833 wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
836 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
837 pos += 12; /* BSS Termination Duration */
840 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
843 if (pos + 1 > end || pos + 1 + pos[0] > end) {
844 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
845 "Management Request (URL)");
848 os_memcpy(url, pos + 1, pos[0]);
852 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
853 wpa_sm_pmf_enabled(wpa_s->wpa),
854 wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
857 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
858 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
859 "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
860 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
861 /* TODO: mark current BSS less preferred for
863 wpa_printf(MSG_DEBUG, "Trying to find another BSS");
864 wpa_supplicant_req_scan(wpa_s, 0, 0);
868 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
869 unsigned int valid_ms;
871 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
872 wnm_deallocate_memory(wpa_s);
873 wpa_s->wnm_neighbor_report_elements = os_calloc(
874 WNM_MAX_NEIGHBOR_REPORT,
875 sizeof(struct neighbor_report));
876 if (wpa_s->wnm_neighbor_report_elements == NULL)
879 while (pos + 2 <= end &&
880 wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
885 wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
887 if (pos + len > end) {
888 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
891 if (tag == WLAN_EID_NEIGHBOR_REPORT) {
892 struct neighbor_report *rep;
893 rep = &wpa_s->wnm_neighbor_report_elements[
894 wpa_s->wnm_num_neighbor_report];
895 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
899 wpa_s->wnm_num_neighbor_report++;
901 wnm_sort_cand_list(wpa_s);
902 wnm_dump_cand_list(wpa_s);
903 valid_ms = valid_int * beacon_int * 128 / 125;
904 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
906 os_get_reltime(&wpa_s->wnm_cand_valid_until);
907 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
908 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
909 wpa_s->wnm_cand_valid_until.sec +=
910 wpa_s->wnm_cand_valid_until.usec / 1000000;
911 wpa_s->wnm_cand_valid_until.usec %= 1000000;
912 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
914 if (wpa_s->last_scan_res_used > 0) {
915 struct os_reltime now;
917 os_get_reltime(&now);
918 if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
919 wpa_printf(MSG_DEBUG,
920 "WNM: Try to use recent scan results");
921 if (wnm_scan_process(wpa_s, 0) > 0)
923 wpa_printf(MSG_DEBUG,
924 "WNM: No match in previous scan results - try a new scan");
928 wnm_set_scan_freqs(wpa_s);
929 wpa_supplicant_req_scan(wpa_s, 0, 0);
931 enum bss_trans_mgmt_status_code status;
932 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
933 status = WNM_BSS_TM_ACCEPT;
935 wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
936 status = WNM_BSS_TM_REJECT_UNSPECIFIED;
938 wnm_send_bss_transition_mgmt_resp(wpa_s,
939 wpa_s->wnm_dialog_token,
945 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
949 struct ieee80211_mgmt *mgmt;
953 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
954 MACSTR " query_reason=%u",
955 MAC2STR(wpa_s->bssid), query_reason);
957 mgmt = (struct ieee80211_mgmt *) buf;
958 os_memset(&buf, 0, sizeof(buf));
959 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
960 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
961 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
962 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
963 WLAN_FC_STYPE_ACTION);
964 mgmt->u.action.category = WLAN_ACTION_WNM;
965 mgmt->u.action.u.bss_tm_query.action = WNM_BSS_TRANS_MGMT_QUERY;
966 mgmt->u.action.u.bss_tm_query.dialog_token = 1;
967 mgmt->u.action.u.bss_tm_query.query_reason = query_reason;
968 pos = mgmt->u.action.u.bss_tm_query.variable;
970 len = pos - (u8 *) &mgmt->u.action.category;
972 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
973 wpa_s->own_addr, wpa_s->bssid,
974 &mgmt->u.action.category, len, 0);
980 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
981 const u8 *sa, const u8 *data,
984 const u8 *pos, *end, *next;
990 while (pos + 1 < end) {
993 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
995 if (ie_len > end - pos) {
996 wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1000 next = pos + ie_len;
1005 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1006 WPA_GET_BE24(pos), pos[3]);
1009 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1010 WPA_GET_BE24(pos) == OUI_WFA &&
1011 pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1012 /* Subscription Remediation subelement */
1018 wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1020 ie_end = pos + ie_len;
1024 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1028 if (pos + url_len + 1 > ie_end) {
1029 wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1031 (int) (ie_end - pos));
1034 url = os_malloc(url_len + 1);
1037 os_memcpy(url, pos, url_len);
1038 url[url_len] = '\0';
1039 osu_method = pos[url_len];
1041 hs20_rx_subscription_remediation(wpa_s, url,
1048 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1049 WPA_GET_BE24(pos) == OUI_WFA &&
1050 pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1057 ie_end = pos + ie_len;
1060 reauth_delay = WPA_GET_LE16(pos);
1063 wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1064 "Imminent - Reason Code %u "
1065 "Re-Auth Delay %u URL Length %u",
1066 code, reauth_delay, url_len);
1067 if (pos + url_len > ie_end)
1069 url = os_malloc(url_len + 1);
1072 os_memcpy(url, pos, url_len);
1073 url[url_len] = '\0';
1074 hs20_rx_deauth_imminent_notice(wpa_s, code,
1080 #endif /* CONFIG_HS20 */
1087 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1088 const u8 *sa, const u8 *frm, int len)
1090 const u8 *pos, *end;
1091 u8 dialog_token, type;
1093 /* Dialog Token [1] | Type [1] | Subelements */
1095 if (len < 2 || sa == NULL)
1099 dialog_token = *pos++;
1102 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1103 "(dialog_token %u type %u sa " MACSTR ")",
1104 dialog_token, type, MAC2STR(sa));
1105 wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1108 if (wpa_s->wpa_state != WPA_COMPLETED ||
1109 os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1110 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1111 "from our AP - ignore it");
1117 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1120 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1121 "WNM-Notification type %u", type);
1127 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1128 const struct ieee80211_mgmt *mgmt, size_t len)
1130 const u8 *pos, *end;
1133 if (len < IEEE80211_HDRLEN + 2)
1136 pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1138 end = ((const u8 *) mgmt) + len;
1140 wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1141 act, MAC2STR(mgmt->sa));
1142 if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1143 os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1144 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1150 case WNM_BSS_TRANS_MGMT_REQ:
1151 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1152 !(mgmt->da[0] & 0x01));
1154 case WNM_SLEEP_MODE_RESP:
1155 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1157 case WNM_NOTIFICATION_REQ:
1158 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1161 wpa_printf(MSG_ERROR, "WNM: Unknown request");