[thirdparty/hostap.git] / wpa_supplicant / mbo.c

/*
 * wpa_supplicant - MBO
 *
 * Copyright(c) 2015 Intel Deutschland GmbH
 * Contact Information:
 * Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "utils/includes.h"

#include "utils/common.h"
#include "common/ieee802_11_defs.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "bss.h"

/* type + length + oui + oui type */
#define MBO_IE_HEADER 6


static int wpas_mbo_validate_non_pref_chan(u8 oper_class, u8 chan, u8 reason)
{
	if (reason > MBO_NON_PREF_CHAN_REASON_INT_INTERFERENCE)
		return -1;

	/* Only checking the validity of the channel and oper_class */
	if (ieee80211_chan_to_freq(NULL, oper_class, chan) == -1)
		return -1;

	return 0;
}


static void wpas_mbo_non_pref_chan_attr_body(struct wpa_supplicant *wpa_s,
					     struct wpabuf *mbo,
					     u8 start, u8 end)
{
	u8 i;

	wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].oper_class);

	for (i = start; i < end; i++)
		wpabuf_put_u8(mbo, wpa_s->non_pref_chan[i].chan);

	wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].preference);
	wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason);
	wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason_detail);
}


static void wpas_mbo_non_pref_chan_attr(struct wpa_supplicant *wpa_s,
					struct wpabuf *mbo, u8 start, u8 end)
{
	size_t size = end - start + 4;

	if (size + 2 > wpabuf_tailroom(mbo))
		return;

	wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT);
	wpabuf_put_u8(mbo, size); /* Length */

	wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end);
}


static void wpas_mbo_non_pref_chan_subelem_hdr(struct wpabuf *mbo, u8 len)
{
	wpabuf_put_u8(mbo, WLAN_EID_VENDOR_SPECIFIC);
	wpabuf_put_u8(mbo, len); /* Length */
	wpabuf_put_be24(mbo, OUI_WFA);
	wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT);
}


static void wpas_mbo_non_pref_chan_subelement(struct wpa_supplicant *wpa_s,
					      struct wpabuf *mbo, u8 start,
					      u8 end)
{
	size_t size = end - start + 8;

	if (size + 2 > wpabuf_tailroom(mbo))
		return;

	wpas_mbo_non_pref_chan_subelem_hdr(mbo, size);
	wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end);
}


static void wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant *wpa_s,
					 struct wpabuf *mbo, int subelement)
{
	u8 i, start = 0;
	struct wpa_mbo_non_pref_channel *start_pref;

	if (!wpa_s->non_pref_chan || !wpa_s->non_pref_chan_num) {
		if (subelement)
			wpas_mbo_non_pref_chan_subelem_hdr(mbo, 4);
		return;
	}
	start_pref = &wpa_s->non_pref_chan[0];

	for (i = 1; i <= wpa_s->non_pref_chan_num; i++) {
		struct wpa_mbo_non_pref_channel *non_pref = NULL;

		if (i < wpa_s->non_pref_chan_num)
			non_pref = &wpa_s->non_pref_chan[i];
		if (!non_pref ||
		    non_pref->oper_class != start_pref->oper_class ||
		    non_pref->reason != start_pref->reason ||
		    non_pref->reason_detail != start_pref->reason_detail ||
		    non_pref->preference != start_pref->preference) {
			if (subelement)
				wpas_mbo_non_pref_chan_subelement(wpa_s, mbo,
								  start, i);
			else
				wpas_mbo_non_pref_chan_attr(wpa_s, mbo, start,
							    i);

			if (!non_pref)
				return;

			start = i;
			start_pref = non_pref;
		}
	}
}


int wpas_mbo_ie(struct wpa_supplicant *wpa_s, u8 *buf, size_t len)
{
	struct wpabuf *mbo;
	int res;

	if (len < MBO_IE_HEADER + 3 + 7)
		return 0;

	/* Leave room for the MBO IE header */
	mbo = wpabuf_alloc(len - MBO_IE_HEADER);
	if (!mbo)
		return 0;

	/* Add non-preferred channels attribute */
	wpas_mbo_non_pref_chan_attrs(wpa_s, mbo, 0);

	/*
	 * Send cellular capabilities attribute even if AP does not advertise
	 * cellular capabilities.
	 */
	wpabuf_put_u8(mbo, MBO_ATTR_ID_CELL_DATA_CAPA);
	wpabuf_put_u8(mbo, 1);
	wpabuf_put_u8(mbo, wpa_s->conf->mbo_cell_capa);

	res = mbo_add_ie(buf, len, wpabuf_head_u8(mbo), wpabuf_len(mbo));
	if (!res)
		wpa_printf(MSG_ERROR, "Failed to add MBO IE");

	wpabuf_free(mbo);
	return res;
}


static void wpas_mbo_send_wnm_notification(struct wpa_supplicant *wpa_s)
{
	struct wpabuf *buf;
	int res;

	/*
	 * Send WNM-Notification Request frame only in case of a change in
	 * non-preferred channels list during association, if the AP supports
	 * MBO.
	 */
	if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_s->current_bss ||
	    !wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE))
		return;

	buf = wpabuf_alloc(512);
	if (!buf)
		return;

	wpabuf_put_u8(buf, WLAN_ACTION_WNM);
	wpabuf_put_u8(buf, WNM_NOTIFICATION_REQ);
	wpa_s->mbo_wnm_token++;
	if (wpa_s->mbo_wnm_token == 0)
		wpa_s->mbo_wnm_token++;
	wpabuf_put_u8(buf, wpa_s->mbo_wnm_token);
	wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); /* Type */

	wpas_mbo_non_pref_chan_attrs(wpa_s, buf, 1);

	res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
				  wpa_s->own_addr, wpa_s->bssid,
				  wpabuf_head(buf), wpabuf_len(buf), 0);
	if (res < 0)
		wpa_printf(MSG_DEBUG,
			   "Failed to send WNM-Notification Request frame with non-preferred channel list");

	wpabuf_free(buf);
}


static int wpa_non_pref_chan_is_eq(struct wpa_mbo_non_pref_channel *a,
				   struct wpa_mbo_non_pref_channel *b)
{
	return a->oper_class == b->oper_class && a->chan == b->chan;
}


/*
 * wpa_non_pref_chan_cmp - Compare two channels for sorting
 *
 * In MBO IE non-preferred channel subelement we can put many channels in an
 * attribute if they are in the same operating class and have the same
 * preference, reason, and reason detail. To make it easy for the functions that
 * build the IE attributes and WNM Request subelements, save the channels sorted
 * by their oper_class, reason, and reason_detail.
 */
static int wpa_non_pref_chan_cmp(const void *_a, const void *_b)
{
	const struct wpa_mbo_non_pref_channel *a = _a, *b = _b;

	if (a->oper_class != b->oper_class)
		return a->oper_class - b->oper_class;
	if (a->reason != b->reason)
		return a->reason - b->reason;
	if (a->reason_detail != b->reason_detail)
		return a->reason_detail - b->reason_detail;
	return a->preference - b->preference;
}


int wpas_mbo_update_non_pref_chan(struct wpa_supplicant *wpa_s,
				  const char *non_pref_chan)
{
	char *cmd, *token, *context = NULL;
	struct wpa_mbo_non_pref_channel *chans = NULL, *tmp_chans;
	size_t num = 0, size = 0;
	unsigned i;

	wpa_printf(MSG_DEBUG, "MBO: Update non-preferred channels, non_pref_chan=%s",
		   non_pref_chan ? non_pref_chan : "N/A");

	/*
	 * The shortest channel configuration is 10 characters - commas, 3
	 * colons, and 4 values that one of them (oper_class) is 2 digits or
	 * more.
	 */
	if (!non_pref_chan || os_strlen(non_pref_chan) < 10)
		goto update;

	cmd = os_strdup(non_pref_chan);
	if (!cmd)
		return -1;

	while ((token = str_token(cmd, " ", &context))) {
		struct wpa_mbo_non_pref_channel *chan;
		int ret;
		unsigned int _oper_class;
		unsigned int _chan;
		unsigned int _preference;
		unsigned int _reason;
		unsigned int _reason_detail;

		if (num == size) {
			size = size ? size * 2 : 1;
			tmp_chans = os_realloc_array(chans, size,
						     sizeof(*chans));
			if (!tmp_chans) {
				wpa_printf(MSG_ERROR,
					   "Couldn't reallocate non_pref_chan");
				goto fail;
			}
			chans = tmp_chans;
		}

		chan = &chans[num];

		ret = sscanf(token, "%u:%u:%u:%u:%u", &_oper_class,
			     &_chan, &_preference, &_reason,
			     &_reason_detail);
		if ((ret != 4 && ret != 5) ||
		    _oper_class > 255 || _chan > 255 ||
		    _preference > 255 || _reason > 65535 ||
		    (ret == 5 && _reason_detail > 255)) {
			wpa_printf(MSG_ERROR, "Invalid non-pref chan input %s",
				   token);
			goto fail;
		}
		chan->oper_class = _oper_class;
		chan->chan = _chan;
		chan->preference = _preference;
		chan->reason = _reason;
		chan->reason_detail = ret == 4 ? 0 : _reason_detail;

		if (wpas_mbo_validate_non_pref_chan(chan->oper_class,
						    chan->chan, chan->reason)) {
			wpa_printf(MSG_ERROR,
				   "Invalid non_pref_chan: oper class %d chan %d reason %d",
				   chan->oper_class, chan->chan, chan->reason);
			goto fail;
		}

		for (i = 0; i < num; i++)
			if (wpa_non_pref_chan_is_eq(chan, &chans[i]))
				break;
		if (i != num) {
			wpa_printf(MSG_ERROR,
				   "oper class %d chan %d is duplicated",
				   chan->oper_class, chan->chan);
			goto fail;
		}

		num++;
	}

	os_free(cmd);

	if (chans) {
		qsort(chans, num, sizeof(struct wpa_mbo_non_pref_channel),
		      wpa_non_pref_chan_cmp);
	}

update:
	os_free(wpa_s->non_pref_chan);
	wpa_s->non_pref_chan = chans;
	wpa_s->non_pref_chan_num = num;
	wpas_mbo_send_wnm_notification(wpa_s);

	return 0;

fail:
	os_free(chans);
	os_free(cmd);
	return -1;
}


void wpas_mbo_scan_ie(struct wpa_supplicant *wpa_s, struct wpabuf *ie)
{
	wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
	wpabuf_put_u8(ie, 7);
	wpabuf_put_be24(ie, OUI_WFA);
	wpabuf_put_u8(ie, MBO_OUI_TYPE);

	wpabuf_put_u8(ie, MBO_ATTR_ID_CELL_DATA_CAPA);
	wpabuf_put_u8(ie, 1);
	wpabuf_put_u8(ie, wpa_s->conf->mbo_cell_capa);
}
Commit	Line	Data
92c6e2e3 DS	1	/*
	2	* wpa_supplicant - MBO
	3	*
	4	* Copyright(c) 2015 Intel Deutschland GmbH
	5	* Contact Information:
	6	* Intel Linux Wireless <ilw@linux.intel.com>
	7	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	8	*
	9	* This software may be distributed under the terms of the BSD license.
	10	* See README for more details.
	11	*/
	12
	13	#include "utils/includes.h"
	14
	15	#include "utils/common.h"
	16	#include "common/ieee802_11_defs.h"
	17	#include "config.h"
	18	#include "wpa_supplicant_i.h"
	19	#include "driver_i.h"
	20	#include "bss.h"
	21
	22	/* type + length + oui + oui type */
	23	#define MBO_IE_HEADER 6
	24
	25
	26	static int wpas_mbo_validate_non_pref_chan(u8 oper_class, u8 chan, u8 reason)
	27	{
	28	if (reason > MBO_NON_PREF_CHAN_REASON_INT_INTERFERENCE)
	29	return -1;
	30
	31	/* Only checking the validity of the channel and oper_class */
	32	if (ieee80211_chan_to_freq(NULL, oper_class, chan) == -1)
	33	return -1;
	34
	35	return 0;
	36	}
	37
	38
	39	static void wpas_mbo_non_pref_chan_attr_body(struct wpa_supplicant *wpa_s,
	40	struct wpabuf *mbo,
	41	u8 start, u8 end)
	42	{
	43	u8 i;
	44
	45	wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].oper_class);
	46
	47	for (i = start; i < end; i++)
	48	wpabuf_put_u8(mbo, wpa_s->non_pref_chan[i].chan);
	49
	50	wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].preference);
	51	wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason);
	52	wpabuf_put_u8(mbo, wpa_s->non_pref_chan[start].reason_detail);
	53	}
	54
	55
	56	static void wpas_mbo_non_pref_chan_attr(struct wpa_supplicant *wpa_s,
	57	struct wpabuf *mbo, u8 start, u8 end)
	58	{
	59	size_t size = end - start + 4;
	60
	61	if (size + 2 > wpabuf_tailroom(mbo))
	62	return;
	63
	64	wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT);
65	wpabuf_put_u8(mbo, size); /* Length */
66
67	wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end);
68	}
69
70
2d5b8614 DS	71	static void wpas_mbo_non_pref_chan_subelem_hdr(struct wpabuf *mbo, u8 len)
	72	{
	73	wpabuf_put_u8(mbo, WLAN_EID_VENDOR_SPECIFIC);
	74	wpabuf_put_u8(mbo, len); /* Length */
	75	wpabuf_put_be24(mbo, OUI_WFA);
	76	wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT);
	77	}
	78
	79
	80	static void wpas_mbo_non_pref_chan_subelement(struct wpa_supplicant *wpa_s,
	81	struct wpabuf *mbo, u8 start,
	82	u8 end)
	83	{
	84	size_t size = end - start + 8;
	85
	86	if (size + 2 > wpabuf_tailroom(mbo))
	87	return;
	88
	89	wpas_mbo_non_pref_chan_subelem_hdr(mbo, size);
	90	wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end);
	91	}
	92
92c6e2e3	93
2d5b8614 DS	94	static void wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant *wpa_s,
2d5b8614 DS	95	struct wpabuf *mbo, int subelement)
92c6e2e3 DS	96	{
	97	u8 i, start = 0;
	98	struct wpa_mbo_non_pref_channel *start_pref;
	99
2d5b8614 DS	100	if (!wpa_s->non_pref_chan \|\| !wpa_s->non_pref_chan_num) {
	101	if (subelement)
	102	wpas_mbo_non_pref_chan_subelem_hdr(mbo, 4);
92c6e2e3	103	return;
2d5b8614	104	}
92c6e2e3 DS	105	start_pref = &wpa_s->non_pref_chan[0];
	106
	107	for (i = 1; i <= wpa_s->non_pref_chan_num; i++) {
	108	struct wpa_mbo_non_pref_channel *non_pref = NULL;
	109
	110	if (i < wpa_s->non_pref_chan_num)
	111	non_pref = &wpa_s->non_pref_chan[i];
	112	if (!non_pref \|\|
	113	non_pref->oper_class != start_pref->oper_class \|\|
	114	non_pref->reason != start_pref->reason \|\|
	115	non_pref->reason_detail != start_pref->reason_detail \|\|
	116	non_pref->preference != start_pref->preference) {
2d5b8614 DS	117	if (subelement)
	118	wpas_mbo_non_pref_chan_subelement(wpa_s, mbo,
	119	start, i);
	120	else
	121	wpas_mbo_non_pref_chan_attr(wpa_s, mbo, start,
	122	i);
92c6e2e3 DS	123
	124	if (!non_pref)
	125	return;
	126
	127	start = i;
	128	start_pref = non_pref;
	129	}
	130	}
	131	}
	132
	133
	134	int wpas_mbo_ie(struct wpa_supplicant wpa_s, u8 buf, size_t len)
	135	{
	136	struct wpabuf *mbo;
	137	int res;
	138
c5d193d7	139	if (len < MBO_IE_HEADER + 3 + 7)
92c6e2e3 DS	140	return 0;
	141
	142	/* Leave room for the MBO IE header */
	143	mbo = wpabuf_alloc(len - MBO_IE_HEADER);
	144	if (!mbo)
	145	return 0;
	146
	147	/* Add non-preferred channels attribute */
2d5b8614	148	wpas_mbo_non_pref_chan_attrs(wpa_s, mbo, 0);
92c6e2e3	149
c5d193d7 DS	150	/*
	151	* Send cellular capabilities attribute even if AP does not advertise
	152	* cellular capabilities.
	153	*/
	154	wpabuf_put_u8(mbo, MBO_ATTR_ID_CELL_DATA_CAPA);
	155	wpabuf_put_u8(mbo, 1);
	156	wpabuf_put_u8(mbo, wpa_s->conf->mbo_cell_capa);
	157
92c6e2e3 DS	158	res = mbo_add_ie(buf, len, wpabuf_head_u8(mbo), wpabuf_len(mbo));
	159	if (!res)
	160	wpa_printf(MSG_ERROR, "Failed to add MBO IE");
	161
	162	wpabuf_free(mbo);
	163	return res;
	164	}
	165
	166
2d5b8614 DS	167	static void wpas_mbo_send_wnm_notification(struct wpa_supplicant *wpa_s)
	168	{
	169	struct wpabuf *buf;
	170	int res;
	171
	172	/*
	173	* Send WNM-Notification Request frame only in case of a change in
	174	* non-preferred channels list during association, if the AP supports
	175	* MBO.
	176	*/
	177	if (wpa_s->wpa_state != WPA_COMPLETED \|\| !wpa_s->current_bss \|\|
	178	!wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE))
	179	return;
	180
	181	buf = wpabuf_alloc(512);
	182	if (!buf)
	183	return;
	184
	185	wpabuf_put_u8(buf, WLAN_ACTION_WNM);
	186	wpabuf_put_u8(buf, WNM_NOTIFICATION_REQ);
	187	wpa_s->mbo_wnm_token++;
	188	if (wpa_s->mbo_wnm_token == 0)
	189	wpa_s->mbo_wnm_token++;
	190	wpabuf_put_u8(buf, wpa_s->mbo_wnm_token);
	191	wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); /* Type */
	192
	193	wpas_mbo_non_pref_chan_attrs(wpa_s, buf, 1);
	194
	195	res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
	196	wpa_s->own_addr, wpa_s->bssid,
	197	wpabuf_head(buf), wpabuf_len(buf), 0);
	198	if (res < 0)
	199	wpa_printf(MSG_DEBUG,
	200	"Failed to send WNM-Notification Request frame with non-preferred channel list");
	201
	202	wpabuf_free(buf);
	203	}
	204
	205
92c6e2e3 DS	206	static int wpa_non_pref_chan_is_eq(struct wpa_mbo_non_pref_channel *a,
	207	struct wpa_mbo_non_pref_channel *b)
	208	{
	209	return a->oper_class == b->oper_class && a->chan == b->chan;
	210	}
	211
	212
	213	/*
	214	* wpa_non_pref_chan_cmp - Compare two channels for sorting
	215	*
	216	* In MBO IE non-preferred channel subelement we can put many channels in an
	217	* attribute if they are in the same operating class and have the same
	218	* preference, reason, and reason detail. To make it easy for the functions that
	219	* build the IE attributes and WNM Request subelements, save the channels sorted
	220	* by their oper_class, reason, and reason_detail.
	221	*/
	222	static int wpa_non_pref_chan_cmp(const void _a, const void _b)
	223	{
	224	const struct wpa_mbo_non_pref_channel a = _a, b = _b;
	225
	226	if (a->oper_class != b->oper_class)
	227	return a->oper_class - b->oper_class;
	228	if (a->reason != b->reason)
	229	return a->reason - b->reason;
	230	if (a->reason_detail != b->reason_detail)
	231	return a->reason_detail - b->reason_detail;
	232	return a->preference - b->preference;
	233	}
	234
	235
	236	int wpas_mbo_update_non_pref_chan(struct wpa_supplicant *wpa_s,
	237	const char *non_pref_chan)
	238	{
	239	char cmd, token, *context = NULL;
	240	struct wpa_mbo_non_pref_channel chans = NULL, tmp_chans;
	241	size_t num = 0, size = 0;
	242	unsigned i;
	243
	244	wpa_printf(MSG_DEBUG, "MBO: Update non-preferred channels, non_pref_chan=%s",
	245	non_pref_chan ? non_pref_chan : "N/A");
	246
	247	/*
	248	* The shortest channel configuration is 10 characters - commas, 3
	249	* colons, and 4 values that one of them (oper_class) is 2 digits or
	250	* more.
	251	*/
	252	if (!non_pref_chan \|\| os_strlen(non_pref_chan) < 10)
	253	goto update;
	254
	255	cmd = os_strdup(non_pref_chan);
	256	if (!cmd)
	257	return -1;
	258
	259	while ((token = str_token(cmd, " ", &context))) {
	260	struct wpa_mbo_non_pref_channel *chan;
	261	int ret;
	262	unsigned int _oper_class;
	263	unsigned int _chan;
	264	unsigned int _preference;
	265	unsigned int _reason;
	266	unsigned int _reason_detail;
	267
	268	if (num == size) {
	269	size = size ? size * 2 : 1;
270	tmp_chans = os_realloc_array(chans, size,
271	sizeof(*chans));
272	if (!tmp_chans) {
273	wpa_printf(MSG_ERROR,
274	"Couldn't reallocate non_pref_chan");
275	goto fail;
276	}
277	chans = tmp_chans;
278	}
279
280	chan = &chans[num];
281
282	ret = sscanf(token, "%u:%u:%u:%u:%u", &_oper_class,
283	&_chan, &_preference, &_reason,
284	&_reason_detail);
285	if ((ret != 4 && ret != 5) \|\|
286	_oper_class > 255 \|\| _chan > 255 \|\|
287	_preference > 255 \|\| _reason > 65535 \|\|
288	(ret == 5 && _reason_detail > 255)) {
289	wpa_printf(MSG_ERROR, "Invalid non-pref chan input %s",
290	token);
291	goto fail;
292	}
293	chan->oper_class = _oper_class;
294	chan->chan = _chan;
295	chan->preference = _preference;
296	chan->reason = _reason;
297	chan->reason_detail = ret == 4 ? 0 : _reason_detail;
298
299	if (wpas_mbo_validate_non_pref_chan(chan->oper_class,
300	chan->chan, chan->reason)) {
301	wpa_printf(MSG_ERROR,
302	"Invalid non_pref_chan: oper class %d chan %d reason %d",
303	chan->oper_class, chan->chan, chan->reason);
304	goto fail;
305	}
306
307	for (i = 0; i < num; i++)
308	if (wpa_non_pref_chan_is_eq(chan, &chans[i]))
309	break;
310	if (i != num) {
311	wpa_printf(MSG_ERROR,
312	"oper class %d chan %d is duplicated",
313	chan->oper_class, chan->chan);
314	goto fail;
315	}
316
317	num++;
318	}
319
320	os_free(cmd);
321
322	if (chans) {
323	qsort(chans, num, sizeof(struct wpa_mbo_non_pref_channel),
324	wpa_non_pref_chan_cmp);
325	}
326
327	update:
328	os_free(wpa_s->non_pref_chan);
329	wpa_s->non_pref_chan = chans;
330	wpa_s->non_pref_chan_num = num;
2d5b8614	331	wpas_mbo_send_wnm_notification(wpa_s);
92c6e2e3 DS	332
	333	return 0;
	334
	335	fail:
	336	os_free(chans);
	337	os_free(cmd);
	338	return -1;
	339	}
c5d193d7 DS	340
	341
	342	void wpas_mbo_scan_ie(struct wpa_supplicant wpa_s, struct wpabuf ie)
	343	{
	344	wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
	345	wpabuf_put_u8(ie, 7);
	346	wpabuf_put_be24(ie, OUI_WFA);
	347	wpabuf_put_u8(ie, MBO_OUI_TYPE);
	348
	349	wpabuf_put_u8(ie, MBO_ATTR_ID_CELL_DATA_CAPA);
	350	wpabuf_put_u8(ie, 1);
	351	wpabuf_put_u8(ie, wpa_s->conf->mbo_cell_capa);
	352	}