4 * Copyright(c) 2015 Intel Deutschland GmbH
6 * Intel Linux Wireless <ilw@linux.intel.com>
7 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
9 * This software may be distributed under the terms of the BSD license.
10 * See README for more details.
13 #include "utils/includes.h"
15 #include "utils/common.h"
16 #include "common/ieee802_11_defs.h"
18 #include "wpa_supplicant_i.h"
23 /* type + length + oui + oui type */
24 #define MBO_IE_HEADER 6
27 static int wpas_mbo_validate_non_pref_chan(u8 oper_class, u8 chan, u8 reason)
29 if (reason > MBO_NON_PREF_CHAN_REASON_INT_INTERFERENCE)
32 /* Only checking the validity of the channel and oper_class */
33 if (ieee80211_chan_to_freq(NULL, oper_class, chan) == -1)
40 const u8 * wpas_mbo_get_bss_attr(struct wpa_bss *bss, enum mbo_attr_id attr)
47 mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
51 end = mbo + 2 + mbo[1];
54 return get_ie(mbo, end - mbo, attr);
58 static void wpas_mbo_non_pref_chan_attr_body(struct wpa_supplicant *wpa_s,
64 wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].oper_class);
66 for (i = start; i < end; i++)
67 wpabuf_put_u8(mbo, wpa_s->non_pref_chan[i].chan);
69 wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].preference);
70 wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason);
71 wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason_detail);
75 static void wpas_mbo_non_pref_chan_attr(struct wpa_supplicant *wpa_s,
76 struct wpabuf *mbo, u8 start, u8 end)
78 size_t size = end - start + 4;
80 if (size + 2 > wpabuf_tailroom(mbo))
83 wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT);
84 wpabuf_put_u8(mbo, size); /* Length */
86 wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end);
90 static void wpas_mbo_non_pref_chan_subelem_hdr(struct wpabuf *mbo, u8 len)
92 wpabuf_put_u8(mbo, WLAN_EID_VENDOR_SPECIFIC);
93 wpabuf_put_u8(mbo, len); /* Length */
94 wpabuf_put_be24(mbo, OUI_WFA);
95 wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT);
99 static void wpas_mbo_non_pref_chan_subelement(struct wpa_supplicant *wpa_s,
100 struct wpabuf *mbo, u8 start,
103 size_t size = end - start + 8;
105 if (size + 2 > wpabuf_tailroom(mbo))
108 wpas_mbo_non_pref_chan_subelem_hdr(mbo, size);
109 wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end);
113 static void wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant *wpa_s,
114 struct wpabuf *mbo, int subelement)
117 struct wpa_mbo_non_pref_channel *start_pref;
119 if (!wpa_s->non_pref_chan || !wpa_s->non_pref_chan_num) {
121 wpas_mbo_non_pref_chan_subelem_hdr(mbo, 4);
124 start_pref = &wpa_s->non_pref_chan[0];
126 for (i = 1; i <= wpa_s->non_pref_chan_num; i++) {
127 struct wpa_mbo_non_pref_channel *non_pref = NULL;
129 if (i < wpa_s->non_pref_chan_num)
130 non_pref = &wpa_s->non_pref_chan[i];
132 non_pref->oper_class != start_pref->oper_class ||
133 non_pref->reason != start_pref->reason ||
134 non_pref->reason_detail != start_pref->reason_detail ||
135 non_pref->preference != start_pref->preference) {
137 wpas_mbo_non_pref_chan_subelement(wpa_s, mbo,
140 wpas_mbo_non_pref_chan_attr(wpa_s, mbo, start,
147 start_pref = non_pref;
153 int wpas_mbo_ie(struct wpa_supplicant *wpa_s, u8 *buf, size_t len)
158 if (len < MBO_IE_HEADER + 3 + 7)
161 /* Leave room for the MBO IE header */
162 mbo = wpabuf_alloc(len - MBO_IE_HEADER);
166 /* Add non-preferred channels attribute */
167 wpas_mbo_non_pref_chan_attrs(wpa_s, mbo, 0);
170 * Send cellular capabilities attribute even if AP does not advertise
171 * cellular capabilities.
173 wpabuf_put_u8(mbo, MBO_ATTR_ID_CELL_DATA_CAPA);
174 wpabuf_put_u8(mbo, 1);
175 wpabuf_put_u8(mbo, wpa_s->conf->mbo_cell_capa);
177 res = mbo_add_ie(buf, len, wpabuf_head_u8(mbo), wpabuf_len(mbo));
179 wpa_printf(MSG_ERROR, "Failed to add MBO IE");
186 static void wpas_mbo_send_wnm_notification(struct wpa_supplicant *wpa_s,
187 const u8 *data, size_t len)
193 * Send WNM-Notification Request frame only in case of a change in
194 * non-preferred channels list during association, if the AP supports
197 if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_s->current_bss ||
198 !wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE))
201 buf = wpabuf_alloc(4 + len);
205 wpabuf_put_u8(buf, WLAN_ACTION_WNM);
206 wpabuf_put_u8(buf, WNM_NOTIFICATION_REQ);
207 wpa_s->mbo_wnm_token++;
208 if (wpa_s->mbo_wnm_token == 0)
209 wpa_s->mbo_wnm_token++;
210 wpabuf_put_u8(buf, wpa_s->mbo_wnm_token);
211 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); /* Type */
213 wpabuf_put_data(buf, data, len);
215 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
216 wpa_s->own_addr, wpa_s->bssid,
217 wpabuf_head(buf), wpabuf_len(buf), 0);
219 wpa_printf(MSG_DEBUG,
220 "Failed to send WNM-Notification Request frame with non-preferred channel list");
226 static void wpas_mbo_non_pref_chan_changed(struct wpa_supplicant *wpa_s)
230 buf = wpabuf_alloc(512);
234 wpas_mbo_non_pref_chan_attrs(wpa_s, buf, 1);
235 wpas_mbo_send_wnm_notification(wpa_s, wpabuf_head_u8(buf),
241 static int wpa_non_pref_chan_is_eq(struct wpa_mbo_non_pref_channel *a,
242 struct wpa_mbo_non_pref_channel *b)
244 return a->oper_class == b->oper_class && a->chan == b->chan;
249 * wpa_non_pref_chan_cmp - Compare two channels for sorting
251 * In MBO IE non-preferred channel subelement we can put many channels in an
252 * attribute if they are in the same operating class and have the same
253 * preference, reason, and reason detail. To make it easy for the functions that
254 * build the IE attributes and WNM Request subelements, save the channels sorted
255 * by their oper_class, reason, and reason_detail.
257 static int wpa_non_pref_chan_cmp(const void *_a, const void *_b)
259 const struct wpa_mbo_non_pref_channel *a = _a, *b = _b;
261 if (a->oper_class != b->oper_class)
262 return a->oper_class - b->oper_class;
263 if (a->reason != b->reason)
264 return a->reason - b->reason;
265 if (a->reason_detail != b->reason_detail)
266 return a->reason_detail - b->reason_detail;
267 return a->preference - b->preference;
271 int wpas_mbo_update_non_pref_chan(struct wpa_supplicant *wpa_s,
272 const char *non_pref_chan)
274 char *cmd, *token, *context = NULL;
275 struct wpa_mbo_non_pref_channel *chans = NULL, *tmp_chans;
276 size_t num = 0, size = 0;
279 wpa_printf(MSG_DEBUG, "MBO: Update non-preferred channels, non_pref_chan=%s",
280 non_pref_chan ? non_pref_chan : "N/A");
283 * The shortest channel configuration is 10 characters - commas, 3
284 * colons, and 4 values that one of them (oper_class) is 2 digits or
287 if (!non_pref_chan || os_strlen(non_pref_chan) < 10)
290 cmd = os_strdup(non_pref_chan);
294 while ((token = str_token(cmd, " ", &context))) {
295 struct wpa_mbo_non_pref_channel *chan;
297 unsigned int _oper_class;
299 unsigned int _preference;
300 unsigned int _reason;
301 unsigned int _reason_detail;
304 size = size ? size * 2 : 1;
305 tmp_chans = os_realloc_array(chans, size,
308 wpa_printf(MSG_ERROR,
309 "Couldn't reallocate non_pref_chan");
317 ret = sscanf(token, "%u:%u:%u:%u:%u", &_oper_class,
318 &_chan, &_preference, &_reason,
320 if ((ret != 4 && ret != 5) ||
321 _oper_class > 255 || _chan > 255 ||
322 _preference > 255 || _reason > 65535 ||
323 (ret == 5 && _reason_detail > 255)) {
324 wpa_printf(MSG_ERROR, "Invalid non-pref chan input %s",
328 chan->oper_class = _oper_class;
330 chan->preference = _preference;
331 chan->reason = _reason;
332 chan->reason_detail = ret == 4 ? 0 : _reason_detail;
334 if (wpas_mbo_validate_non_pref_chan(chan->oper_class,
335 chan->chan, chan->reason)) {
336 wpa_printf(MSG_ERROR,
337 "Invalid non_pref_chan: oper class %d chan %d reason %d",
338 chan->oper_class, chan->chan, chan->reason);
342 for (i = 0; i < num; i++)
343 if (wpa_non_pref_chan_is_eq(chan, &chans[i]))
346 wpa_printf(MSG_ERROR,
347 "oper class %d chan %d is duplicated",
348 chan->oper_class, chan->chan);
358 qsort(chans, num, sizeof(struct wpa_mbo_non_pref_channel),
359 wpa_non_pref_chan_cmp);
363 os_free(wpa_s->non_pref_chan);
364 wpa_s->non_pref_chan = chans;
365 wpa_s->non_pref_chan_num = num;
366 wpas_mbo_non_pref_chan_changed(wpa_s);
377 void wpas_mbo_scan_ie(struct wpa_supplicant *wpa_s, struct wpabuf *ie)
379 wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
380 wpabuf_put_u8(ie, 7);
381 wpabuf_put_be24(ie, OUI_WFA);
382 wpabuf_put_u8(ie, MBO_OUI_TYPE);
384 wpabuf_put_u8(ie, MBO_ATTR_ID_CELL_DATA_CAPA);
385 wpabuf_put_u8(ie, 1);
386 wpabuf_put_u8(ie, wpa_s->conf->mbo_cell_capa);
394 static enum chan_allowed allow_channel(struct hostapd_hw_modes *mode, u8 chan,
399 for (i = 0; i < mode->num_channels; i++) {
400 if (mode->channels[i].chan == chan)
404 if (i == mode->num_channels ||
405 (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED))
409 *flags = mode->channels[i].flag;
415 static int get_center_80mhz(struct hostapd_hw_modes *mode, u8 channel)
417 u8 center_channels[] = {42, 58, 106, 122, 138, 155};
420 if (mode->mode != HOSTAPD_MODE_IEEE80211A)
423 for (i = 0; i < ARRAY_SIZE(center_channels); i++) {
425 * In 80 MHz, the bandwidth "spans" 12 channels (e.g., 36-48),
426 * so the center channel is 6 channels away from the start/end.
428 if (channel >= center_channels[i] - 6 &&
429 channel <= center_channels[i] + 6)
430 return center_channels[i];
437 static enum chan_allowed verify_80mhz(struct hostapd_hw_modes *mode, u8 channel)
442 center_chan = get_center_80mhz(mode, channel);
446 /* check all the channels are available */
447 for (i = 0; i < 4; i++) {
449 u8 adj_chan = center_chan - 6 + i * 4;
451 if (allow_channel(mode, adj_chan, &flags) == NOT_ALLOWED)
454 if ((i == 0 && !(flags & HOSTAPD_CHAN_VHT_10_70)) ||
455 (i == 1 && !(flags & HOSTAPD_CHAN_VHT_30_50)) ||
456 (i == 2 && !(flags & HOSTAPD_CHAN_VHT_50_30)) ||
457 (i == 3 && !(flags & HOSTAPD_CHAN_VHT_70_10)))
465 static int get_center_160mhz(struct hostapd_hw_modes *mode, u8 channel)
467 u8 center_channels[] = { 50, 114 };
470 if (mode->mode != HOSTAPD_MODE_IEEE80211A)
473 for (i = 0; i < ARRAY_SIZE(center_channels); i++) {
475 * In 160 MHz, the bandwidth "spans" 28 channels (e.g., 36-64),
476 * so the center channel is 14 channels away from the start/end.
478 if (channel >= center_channels[i] - 14 &&
479 channel <= center_channels[i] + 14)
480 return center_channels[i];
487 static enum chan_allowed verify_160mhz(struct hostapd_hw_modes *mode,
493 center_chan = get_center_160mhz(mode, channel);
497 /* Check all the channels are available */
498 for (i = 0; i < 8; i++) {
500 u8 adj_chan = center_chan - 14 + i * 4;
502 if (allow_channel(mode, adj_chan, &flags) == NOT_ALLOWED)
505 if ((i == 0 && !(flags & HOSTAPD_CHAN_VHT_10_150)) ||
506 (i == 1 && !(flags & HOSTAPD_CHAN_VHT_30_130)) ||
507 (i == 2 && !(flags & HOSTAPD_CHAN_VHT_50_110)) ||
508 (i == 3 && !(flags & HOSTAPD_CHAN_VHT_70_90)) ||
509 (i == 4 && !(flags & HOSTAPD_CHAN_VHT_90_70)) ||
510 (i == 5 && !(flags & HOSTAPD_CHAN_VHT_110_50)) ||
511 (i == 6 && !(flags & HOSTAPD_CHAN_VHT_130_30)) ||
512 (i == 7 && !(flags & HOSTAPD_CHAN_VHT_150_10)))
520 static enum chan_allowed verify_channel(struct hostapd_hw_modes *mode,
523 unsigned int flag = 0;
524 enum chan_allowed res, res2;
526 res2 = res = allow_channel(mode, channel, &flag);
527 if (bw == BW40MINUS) {
528 if (!(flag & HOSTAPD_CHAN_HT40MINUS))
530 res2 = allow_channel(mode, channel - 4, NULL);
531 } else if (bw == BW40PLUS) {
532 if (!(flag & HOSTAPD_CHAN_HT40PLUS))
534 res2 = allow_channel(mode, channel + 4, NULL);
535 } else if (bw == BW80) {
537 * channel is a center channel and as such, not necessarily a
538 * valid 20 MHz channels. Override earlier allow_channel()
539 * result and use only the 80 MHz specific version.
541 res2 = res = verify_80mhz(mode, channel);
542 } else if (bw == BW160) {
544 * channel is a center channel and as such, not necessarily a
545 * valid 20 MHz channels. Override earlier allow_channel()
546 * result and use only the 160 MHz specific version.
548 res2 = res = verify_160mhz(mode, channel);
549 } else if (bw == BW80P80) {
551 * channel is a center channel and as such, not necessarily a
552 * valid 20 MHz channels. Override earlier allow_channel()
553 * result and use only the 80 MHz specific version.
555 res2 = res = verify_80mhz(mode, channel);
558 if (res == NOT_ALLOWED || res2 == NOT_ALLOWED)
565 static int wpas_op_class_supported(struct wpa_supplicant *wpa_s,
566 const struct oper_class_map *op_class)
570 struct hostapd_hw_modes *mode;
573 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op_class->mode);
577 if (op_class->op_class == 128) {
578 u8 channels[] = { 42, 58, 106, 122, 138, 155 };
580 for (i = 0; i < ARRAY_SIZE(channels); i++) {
581 if (verify_channel(mode, channels[i], op_class->bw) ==
589 if (op_class->op_class == 129) {
590 /* Check if either 160 MHz channels is allowed */
591 return verify_channel(mode, 50, op_class->bw) == ALLOWED ||
592 verify_channel(mode, 114, op_class->bw) == ALLOWED;
595 if (op_class->op_class == 130) {
596 /* Need at least two non-contiguous 80 MHz segments */
599 if (verify_channel(mode, 42, op_class->bw) == ALLOWED ||
600 verify_channel(mode, 58, op_class->bw) == ALLOWED)
602 if (verify_channel(mode, 106, op_class->bw) == ALLOWED ||
603 verify_channel(mode, 122, op_class->bw) == ALLOWED ||
604 verify_channel(mode, 138, op_class->bw) == ALLOWED)
606 if (verify_channel(mode, 106, op_class->bw) == ALLOWED &&
607 verify_channel(mode, 138, op_class->bw) == ALLOWED)
609 if (verify_channel(mode, 155, op_class->bw) == ALLOWED)
619 for (chan = op_class->min_chan; chan <= op_class->max_chan;
620 chan += op_class->inc) {
621 if (verify_channel(mode, chan, op_class->bw) == ALLOWED) {
631 int wpas_mbo_supp_op_class_ie(struct wpa_supplicant *wpa_s, int freq, u8 *pos,
635 u8 op, current, chan;
640 * Assume 20 MHz channel for now.
641 * TODO: Use the secondary channel and VHT channel width that will be
642 * used after association.
644 if (ieee80211_freq_to_channel_ext(freq, 0, VHT_CHANWIDTH_USE_HT,
645 ¤t, &chan) == NUM_HOSTAPD_MODES)
649 * Need 3 bytes for EID, length, and current operating class, plus
650 * 1 byte for every other supported operating class.
652 buf = wpabuf_alloc(global_op_class_size + 3);
656 wpabuf_put_u8(buf, WLAN_EID_SUPPORTED_OPERATING_CLASSES);
657 /* Will set the length later, putting a placeholder */
658 ie_len = wpabuf_put(buf, 1);
659 wpabuf_put_u8(buf, current);
661 for (op = 0; global_op_class[op].op_class; op++) {
662 if (wpas_op_class_supported(wpa_s, &global_op_class[op]))
663 wpabuf_put_u8(buf, global_op_class[op].op_class);
666 *ie_len = wpabuf_len(buf) - 2;
667 if (*ie_len < 2 || wpabuf_len(buf) > len) {
668 wpa_printf(MSG_ERROR,
669 "Failed to add supported operating classes IE");
672 os_memcpy(pos, wpabuf_head(buf), wpabuf_len(buf));
673 res = wpabuf_len(buf);
674 wpa_hexdump_buf(MSG_DEBUG,
675 "MBO: Added supported operating classes IE",
684 void wpas_mbo_ie_trans_req(struct wpa_supplicant *wpa_s, const u8 *mbo_ie,
687 const u8 *pos, *cell_pref = NULL, *reason = NULL;
689 u16 disallowed_sec = 0;
691 if (len <= 4 || WPA_GET_BE24(mbo_ie) != OUI_WFA ||
692 mbo_ie[3] != MBO_OUI_TYPE)
707 case MBO_ATTR_ID_CELL_DATA_PREF:
711 if (wpa_s->conf->mbo_cell_capa ==
712 MBO_CELL_CAPA_AVAILABLE)
715 wpa_printf(MSG_DEBUG,
716 "MBO: Station does not support Cellular data connection");
718 case MBO_ATTR_ID_TRANSITION_REASON:
724 case MBO_ATTR_ID_ASSOC_RETRY_DELAY:
728 if (wpa_s->wnm_mode &
729 WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
730 wpa_printf(MSG_DEBUG,
731 "MBO: Unexpected association retry delay, BSS is terminating");
733 } else if (wpa_s->wnm_mode &
734 WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
735 disallowed_sec = WPA_GET_LE16(pos);
737 wpa_printf(MSG_DEBUG,
738 "MBO: Association retry delay attribute not in disassoc imminent mode");
742 case MBO_ATTR_ID_AP_CAPA_IND:
743 case MBO_ATTR_ID_NON_PREF_CHAN_REPORT:
744 case MBO_ATTR_ID_CELL_DATA_CAPA:
745 case MBO_ATTR_ID_ASSOC_DISALLOW:
746 case MBO_ATTR_ID_TRANSITION_REJECT_REASON:
747 wpa_printf(MSG_DEBUG,
748 "MBO: Attribute %d should not be included in BTM Request frame",
752 wpa_printf(MSG_DEBUG, "MBO: Unknown attribute id %u",
762 wpa_msg(wpa_s, MSG_INFO, MBO_CELL_PREFERENCE "preference=%u",
766 wpa_msg(wpa_s, MSG_INFO, MBO_TRANSITION_REASON "reason=%u",
769 if (disallowed_sec && wpa_s->current_bss)
770 wpa_bss_tmp_disallow(wpa_s, wpa_s->current_bss->bssid,
775 wpa_printf(MSG_DEBUG, "MBO IE parsing failed (id=%u len=%u left=%zu)",
780 size_t wpas_mbo_ie_bss_trans_reject(struct wpa_supplicant *wpa_s, u8 *pos,
782 enum mbo_transition_reject_reason reason)
786 reject_attr[0] = MBO_ATTR_ID_TRANSITION_REJECT_REASON;
788 reject_attr[2] = reason;
790 return mbo_add_ie(pos, len, reject_attr, sizeof(reject_attr));
794 void wpas_mbo_update_cell_capa(struct wpa_supplicant *wpa_s, u8 mbo_cell_capa)
798 if (wpa_s->conf->mbo_cell_capa == mbo_cell_capa) {
799 wpa_printf(MSG_DEBUG,
800 "MBO: Cellular capability already set to %u",
805 wpa_s->conf->mbo_cell_capa = mbo_cell_capa;
807 cell_capa[0] = WLAN_EID_VENDOR_SPECIFIC;
808 cell_capa[1] = 5; /* Length */
809 WPA_PUT_BE24(cell_capa + 2, OUI_WFA);
810 cell_capa[5] = MBO_ATTR_ID_CELL_DATA_CAPA;
811 cell_capa[6] = mbo_cell_capa;
813 wpas_mbo_send_wnm_notification(wpa_s, cell_capa, 7);
814 wpa_supplicant_set_default_scan_ies(wpa_s);