versions/v1_4_0/mynewt-nimble/nimble/host/mesh/src/beacon.c - mynewt-documentation - Git at Google

 /*  Bluetooth Mesh */

 /*
  * Copyright (c) 2017 Intel Corporation
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 #include <errno.h>
 #include <assert.h>
 #include "os/os_mbuf.h"
 #include "mesh/mesh.h"

 #include "syscfg/syscfg.h"
 #define BT_DBG_ENABLED (MYNEWT_VAL(BLE_MESH_DEBUG_BEACON))
 #include "host/ble_hs_log.h"

 #include "adv.h"
 #include "mesh_priv.h"
 #include "net.h"
 #include "prov.h"
 #include "crypto.h"
 #include "beacon.h"
 #include "foundation.h"

 #define UNPROVISIONED_INTERVAL    (K_SECONDS(5))
 #define PROVISIONED_INTERVAL      (K_SECONDS(10))

 #define BEACON_TYPE_UNPROVISIONED  0x00
 #define BEACON_TYPE_SECURE         0x01

 /* 3 transmissions, 20ms interval */
 #define UNPROV_XMIT                BT_MESH_TRANSMIT(2, 20)

 /* 1 transmission, 20ms interval */
 #define PROV_XMIT                  BT_MESH_TRANSMIT(0, 20)

 static struct k_delayed_work beacon_timer;

 static struct bt_mesh_subnet *cache_check(u8_t data[21])
 {
 	int i;

 	for (i = 0; i < ARRAY_SIZE(bt_mesh.sub); i++) {
 		struct bt_mesh_subnet *sub = &bt_mesh.sub[i];

 		if (sub->net_idx == BT_MESH_KEY_UNUSED) {
 			continue;
 		}

 		if (!memcmp(sub->beacon_cache, data, 21)) {
 			return sub;
 		}
 	}

 	return NULL;
 }

 static void cache_add(u8_t data[21], struct bt_mesh_subnet *sub)
 {
 	memcpy(sub->beacon_cache, data, 21);
 }

 static void beacon_complete(int err, void *user_data)
 {
 	struct bt_mesh_subnet *sub = user_data;

 	BT_DBG("err %d", err);

 	sub->beacon_sent = k_uptime_get_32();
 }

 void bt_mesh_beacon_create(struct bt_mesh_subnet *sub,
 			   struct os_mbuf *buf)
 {
 	u8_t flags = bt_mesh_net_flags(sub);
 	struct bt_mesh_subnet_keys *keys;

 	net_buf_simple_add_u8(buf, BEACON_TYPE_SECURE);

 	if (sub->kr_flag) {
 		keys = &sub->keys[1];
 	} else {
 		keys = &sub->keys[0];
 	}

 	net_buf_simple_add_u8(buf, flags);

 	/* Network ID */
 	net_buf_simple_add_mem(buf, keys->net_id, 8);

 	/* IV Index */
 	net_buf_simple_add_be32(buf, bt_mesh.iv_index);

 	net_buf_simple_add_mem(buf, sub->auth, 8);

 	BT_DBG("net_idx 0x%04x flags 0x%02x NetID %s", sub->net_idx,
 	       flags, bt_hex(keys->net_id, 8));
 	BT_DBG("IV Index 0x%08x Auth %s", bt_mesh.iv_index,
 	       bt_hex(sub->auth, 8));
 }

 /* If the interval has passed or is within 5 seconds from now send a beacon */
 #define BEACON_THRESHOLD(sub) (K_SECONDS(10 * ((sub)->beacons_last + 1)) - \
 			       K_SECONDS(5))

 static int secure_beacon_send(void)
 {
 	static const struct bt_mesh_send_cb send_cb = {
 		.end = beacon_complete,
 	};
 	u32_t now = k_uptime_get_32();
 	int i;

 	BT_DBG("");

 	for (i = 0; i < ARRAY_SIZE(bt_mesh.sub); i++) {
 		struct bt_mesh_subnet *sub = &bt_mesh.sub[i];
 		struct os_mbuf *buf;
 		u32_t time_diff;

 		if (sub->net_idx == BT_MESH_KEY_UNUSED) {
 			continue;
 		}

 		time_diff = now - sub->beacon_sent;
 		if (time_diff < K_SECONDS(600) &&
 		    time_diff < BEACON_THRESHOLD(sub)) {
 			continue;
 		}

 		buf = bt_mesh_adv_create(BT_MESH_ADV_BEACON, PROV_XMIT,
 					 K_NO_WAIT);
 		if (!buf) {
 			BT_ERR("Unable to allocate beacon buffer");
 			return -ENOBUFS;
 		}

 		bt_mesh_beacon_create(sub, buf);

 		bt_mesh_adv_send(buf, &send_cb, sub);
 		net_buf_unref(buf);
 	}

 	return 0;
 }

 static int unprovisioned_beacon_send(void)
 {
 #if (MYNEWT_VAL(BLE_MESH_PB_ADV))
 	const struct bt_mesh_prov *prov;
 	u8_t uri_hash[16] = { 0 };
 	struct os_mbuf *buf;
 	u16_t oob_info;

 	BT_DBG("unprovisioned_beacon_send");

 	buf = bt_mesh_adv_create(BT_MESH_ADV_BEACON, UNPROV_XMIT, K_NO_WAIT);
 	if (!buf) {
 		BT_ERR("Unable to allocate beacon buffer");
 		return -ENOBUFS;
 	}

 	prov = bt_mesh_prov_get();

 	net_buf_add_u8(buf, BEACON_TYPE_UNPROVISIONED);
 	net_buf_add_mem(buf, prov->uuid, 16);

 	if (prov->uri && bt_mesh_s1(prov->uri, uri_hash) == 0) {
 		oob_info = prov->oob_info | BT_MESH_PROV_OOB_URI;
 	} else {
 		oob_info = prov->oob_info;
 	}

 	net_buf_add_be16(buf, oob_info);
 	net_buf_add_mem(buf, uri_hash, 4);

 	bt_mesh_adv_send(buf, NULL, NULL);
 	net_buf_unref(buf);

 	if (prov->uri) {
 		size_t len;

 		buf = bt_mesh_adv_create(BT_MESH_ADV_URI, UNPROV_XMIT,
 					 K_NO_WAIT);
 		if (!buf) {
 			BT_ERR("Unable to allocate URI buffer");
 			return -ENOBUFS;
 		}

 		len = strlen(prov->uri);
 		if (net_buf_tailroom(buf) < len) {
 			BT_WARN("Too long URI to fit advertising data");
 		} else {
 			net_buf_add_mem(buf, prov->uri, len);
 			bt_mesh_adv_send(buf, NULL, NULL);
 		}

 		net_buf_unref(buf);
 	}

 #endif /* MYNEWT_VAL(BLE_MESH_PB_ADV) */
 	return 0;
 }

 static void update_beacon_observation(void)
 {
 	static bool first_half;
 	int i;

 	/* Observation period is 20 seconds, whereas the beacon timer
 	 * runs every 10 seconds. We process what's happened during the
 	 * window only after the seconnd half.
 	 */
 	first_half = !first_half;
 	if (first_half) {
 		return;
 	}

 	for (i = 0; i < ARRAY_SIZE(bt_mesh.sub); i++) {
 		struct bt_mesh_subnet *sub = &bt_mesh.sub[i];

 		if (sub->net_idx == BT_MESH_KEY_UNUSED) {
 			continue;
 		}

 		sub->beacons_last = sub->beacons_cur;
 		sub->beacons_cur = 0;
 	}
 }

 static void beacon_send(struct ble_npl_event *work)
 {
 	/* Don't send anything if we have an active provisioning link */
 	if ((MYNEWT_VAL(BLE_MESH_PROV)) && bt_prov_active()) {
 		k_delayed_work_submit(&beacon_timer, UNPROVISIONED_INTERVAL);
 		return;
 	}

 	BT_DBG("");

 	if (bt_mesh_is_provisioned()) {
 		update_beacon_observation();
 		secure_beacon_send();

 		/* Only resubmit if beaconing is still enabled */
 		if (bt_mesh_beacon_get() == BT_MESH_BEACON_ENABLED ||
 		    bt_mesh.ivu_initiator) {
 			k_delayed_work_submit(&beacon_timer,
 					      PROVISIONED_INTERVAL);
 		}
 	} else {
 		unprovisioned_beacon_send();
 		k_delayed_work_submit(&beacon_timer, UNPROVISIONED_INTERVAL);
 	}

 }

 static void secure_beacon_recv(struct os_mbuf *buf)
 {
 	u8_t *data, *net_id, *auth;
 	struct bt_mesh_subnet *sub;
 	u32_t iv_index;
 	bool new_key, kr_change, iv_change;
 	u8_t flags;

 	if (buf->om_len < 21) {
 		BT_ERR("Too short secure beacon (len %u)", buf->om_len);
 		return;
 	}

 	sub = cache_check(buf->om_data);
 	if (sub) {
 		/* We've seen this beacon before - just update the stats */
 		goto update_stats;
 	}

 	/* So we can add to the cache if auth matches */
 	data = buf->om_data;

 	flags = net_buf_simple_pull_u8(buf);
 	net_id = buf->om_data;
 	net_buf_simple_pull(buf, 8);
 	iv_index = net_buf_simple_pull_be32(buf);
 	auth = buf->om_data;

 	BT_DBG("flags 0x%02x id %s iv_index 0x%08x",
 	       flags, bt_hex(net_id, 8), iv_index);

 	sub = bt_mesh_subnet_find(net_id, flags, iv_index, auth, &new_key);
 	if (!sub) {
 		BT_DBG("No subnet that matched beacon");
 		return;
 	}

 	if (sub->kr_phase == BT_MESH_KR_PHASE_2 && !new_key) {
 		BT_WARN("Ignoring Phase 2 KR Update secured using old key");
 		return;
 	}

 	cache_add(data, sub);

 	/* If we have NetKey0 accept initiation only from it */
 	if (bt_mesh_subnet_get(BT_MESH_KEY_PRIMARY) &&
 	    sub->net_idx != BT_MESH_KEY_PRIMARY) {
 		BT_WARN("Ignoring secure beacon on non-primary subnet");
 		goto update_stats;
 	}

 	BT_DBG("net_idx 0x%04x iv_index 0x%08x, current iv_index 0x%08x",
 	       sub->net_idx, iv_index, bt_mesh.iv_index);

 	if (bt_mesh.ivu_initiator &&
 	    bt_mesh.iv_update == BT_MESH_IV_UPDATE(flags)) {
 		bt_mesh_beacon_ivu_initiator(false);
 	}

 	iv_change = bt_mesh_net_iv_update(iv_index, BT_MESH_IV_UPDATE(flags));

 	kr_change = bt_mesh_kr_update(sub, BT_MESH_KEY_REFRESH(flags), new_key);
 	if (kr_change) {
 		bt_mesh_net_beacon_update(sub);
 	}

 	if (iv_change) {
 		/* Update all subnets */
 		bt_mesh_net_sec_update(NULL);
 	} else if (kr_change) {
 		/* Key Refresh without IV Update only impacts one subnet */
 		bt_mesh_net_sec_update(sub);
 	}

 update_stats:
 	if (bt_mesh_beacon_get() == BT_MESH_BEACON_ENABLED &&
 	    sub->beacons_cur < 0xff) {
 		sub->beacons_cur++;
 	}
 }

 void bt_mesh_beacon_recv(struct os_mbuf *buf)
 {
 	u8_t type;

 	BT_DBG("%u bytes: %s", buf->om_len, bt_hex(buf->om_data, buf->om_len));

 	if (buf->om_len < 1) {
 		BT_ERR("Too short beacon");
 		return;
 	}

 	type = net_buf_simple_pull_u8(buf);
 	switch (type) {
 	case BEACON_TYPE_UNPROVISIONED:
 		BT_DBG("Ignoring unprovisioned device beacon");
 		break;
 	case BEACON_TYPE_SECURE:
 		secure_beacon_recv(buf);
 		break;
 	default:
 		BT_WARN("Unknown beacon type 0x%02x", type);
 		break;
 	}
 }

 void bt_mesh_beacon_init(void)
 {
 	k_delayed_work_init(&beacon_timer, beacon_send);
 }

 void bt_mesh_beacon_ivu_initiator(bool enable)
 {
 	bt_mesh.ivu_initiator = enable;

 	if (enable) {
 		k_work_submit(&beacon_timer.work);
 	} else if (bt_mesh_beacon_get() == BT_MESH_BEACON_DISABLED) {
 		k_delayed_work_cancel(&beacon_timer);
 	}
 }

 void bt_mesh_beacon_enable(void)
 {
 	int i;

 	if (!bt_mesh_is_provisioned()) {
 		k_work_submit(&beacon_timer.work);
 		return;
 	}

 	for (i = 0; i < ARRAY_SIZE(bt_mesh.sub); i++) {
 		struct bt_mesh_subnet *sub = &bt_mesh.sub[i];

 		if (sub->net_idx == BT_MESH_KEY_UNUSED) {
 			continue;
 		}

 		sub->beacons_last = 0;
 		sub->beacons_cur = 0;

 		bt_mesh_net_beacon_update(sub);
 	}

 	k_work_submit(&beacon_timer.work);
 }

 void bt_mesh_beacon_disable(void)
 {
 	if (!bt_mesh.ivu_initiator) {
 		k_delayed_work_cancel(&beacon_timer);
 	}
 }
	/* Bluetooth Mesh */

	/*
	* Copyright (c) 2017 Intel Corporation
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	#include <errno.h>
	#include <assert.h>
	#include "os/os_mbuf.h"
	#include "mesh/mesh.h"

	#include "syscfg/syscfg.h"
	#define BT_DBG_ENABLED (MYNEWT_VAL(BLE_MESH_DEBUG_BEACON))
	#include "host/ble_hs_log.h"

	#include "adv.h"
	#include "mesh_priv.h"
	#include "net.h"
	#include "prov.h"
	#include "crypto.h"
	#include "beacon.h"
	#include "foundation.h"

	#define UNPROVISIONED_INTERVAL (K_SECONDS(5))
	#define PROVISIONED_INTERVAL (K_SECONDS(10))

	#define BEACON_TYPE_UNPROVISIONED 0x00
	#define BEACON_TYPE_SECURE 0x01

	/* 3 transmissions, 20ms interval */
	#define UNPROV_XMIT BT_MESH_TRANSMIT(2, 20)

	/* 1 transmission, 20ms interval */
	#define PROV_XMIT BT_MESH_TRANSMIT(0, 20)

	static struct k_delayed_work beacon_timer;

	static struct bt_mesh_subnet *cache_check(u8_t data[21])
	{
	int i;

	for (i = 0; i < ARRAY_SIZE(bt_mesh.sub); i++) {
	struct bt_mesh_subnet *sub = &bt_mesh.sub[i];

	if (sub->net_idx == BT_MESH_KEY_UNUSED) {
	continue;
	}

	if (!memcmp(sub->beacon_cache, data, 21)) {
	return sub;
	}
	}

	return NULL;
	}

	static void cache_add(u8_t data[21], struct bt_mesh_subnet *sub)
	{
	memcpy(sub->beacon_cache, data, 21);
	}

	static void beacon_complete(int err, void *user_data)
	{
	struct bt_mesh_subnet *sub = user_data;

	BT_DBG("err %d", err);

	sub->beacon_sent = k_uptime_get_32();
	}

	void bt_mesh_beacon_create(struct bt_mesh_subnet *sub,
	struct os_mbuf *buf)
	{
	u8_t flags = bt_mesh_net_flags(sub);
	struct bt_mesh_subnet_keys *keys;

	net_buf_simple_add_u8(buf, BEACON_TYPE_SECURE);

	if (sub->kr_flag) {
	keys = &sub->keys[1];
	} else {
	keys = &sub->keys[0];
	}

	net_buf_simple_add_u8(buf, flags);

	/* Network ID */
	net_buf_simple_add_mem(buf, keys->net_id, 8);

	/* IV Index */
	net_buf_simple_add_be32(buf, bt_mesh.iv_index);

	net_buf_simple_add_mem(buf, sub->auth, 8);

	BT_DBG("net_idx 0x%04x flags 0x%02x NetID %s", sub->net_idx,
	flags, bt_hex(keys->net_id, 8));
	BT_DBG("IV Index 0x%08x Auth %s", bt_mesh.iv_index,
	bt_hex(sub->auth, 8));
	}

	/* If the interval has passed or is within 5 seconds from now send a beacon */
	#define BEACON_THRESHOLD(sub) (K_SECONDS(10 * ((sub)->beacons_last + 1)) - \
	K_SECONDS(5))

	static int secure_beacon_send(void)
	{
	static const struct bt_mesh_send_cb send_cb = {
	.end = beacon_complete,
	};
	u32_t now = k_uptime_get_32();
	int i;

	BT_DBG("");

	for (i = 0; i < ARRAY_SIZE(bt_mesh.sub); i++) {
	struct bt_mesh_subnet *sub = &bt_mesh.sub[i];
	struct os_mbuf *buf;
	u32_t time_diff;

	if (sub->net_idx == BT_MESH_KEY_UNUSED) {
	continue;
	}

	time_diff = now - sub->beacon_sent;
	if (time_diff < K_SECONDS(600) &&
	time_diff < BEACON_THRESHOLD(sub)) {
	continue;
	}

	buf = bt_mesh_adv_create(BT_MESH_ADV_BEACON, PROV_XMIT,
	K_NO_WAIT);
	if (!buf) {
	BT_ERR("Unable to allocate beacon buffer");
	return -ENOBUFS;
	}

	bt_mesh_beacon_create(sub, buf);

	bt_mesh_adv_send(buf, &send_cb, sub);
	net_buf_unref(buf);
	}

	return 0;
	}

	static int unprovisioned_beacon_send(void)
	{
	#if (MYNEWT_VAL(BLE_MESH_PB_ADV))
	const struct bt_mesh_prov *prov;
	u8_t uri_hash[16] = { 0 };
	struct os_mbuf *buf;
	u16_t oob_info;

	BT_DBG("unprovisioned_beacon_send");

	buf = bt_mesh_adv_create(BT_MESH_ADV_BEACON, UNPROV_XMIT, K_NO_WAIT);
	if (!buf) {
	BT_ERR("Unable to allocate beacon buffer");
	return -ENOBUFS;
	}

	prov = bt_mesh_prov_get();

	net_buf_add_u8(buf, BEACON_TYPE_UNPROVISIONED);
	net_buf_add_mem(buf, prov->uuid, 16);

	if (prov->uri && bt_mesh_s1(prov->uri, uri_hash) == 0) {
	oob_info = prov->oob_info \| BT_MESH_PROV_OOB_URI;
	} else {
	oob_info = prov->oob_info;
	}

	net_buf_add_be16(buf, oob_info);
	net_buf_add_mem(buf, uri_hash, 4);

	bt_mesh_adv_send(buf, NULL, NULL);
	net_buf_unref(buf);

	if (prov->uri) {
	size_t len;

	buf = bt_mesh_adv_create(BT_MESH_ADV_URI, UNPROV_XMIT,
	K_NO_WAIT);
	if (!buf) {
	BT_ERR("Unable to allocate URI buffer");
	return -ENOBUFS;
	}

	len = strlen(prov->uri);
	if (net_buf_tailroom(buf) < len) {
	BT_WARN("Too long URI to fit advertising data");
	} else {
	net_buf_add_mem(buf, prov->uri, len);
	bt_mesh_adv_send(buf, NULL, NULL);
	}

	net_buf_unref(buf);
	}

	#endif /* MYNEWT_VAL(BLE_MESH_PB_ADV) */
	return 0;
	}

	static void update_beacon_observation(void)
	{
	static bool first_half;
	int i;

	/* Observation period is 20 seconds, whereas the beacon timer
	* runs every 10 seconds. We process what's happened during the
	* window only after the seconnd half.
	*/
	first_half = !first_half;
	if (first_half) {
	return;
	}

	for (i = 0; i < ARRAY_SIZE(bt_mesh.sub); i++) {
	struct bt_mesh_subnet *sub = &bt_mesh.sub[i];

	if (sub->net_idx == BT_MESH_KEY_UNUSED) {
	continue;
	}

	sub->beacons_last = sub->beacons_cur;
	sub->beacons_cur = 0;
	}
	}

	static void beacon_send(struct ble_npl_event *work)
	{
	/* Don't send anything if we have an active provisioning link */
	if ((MYNEWT_VAL(BLE_MESH_PROV)) && bt_prov_active()) {
	k_delayed_work_submit(&beacon_timer, UNPROVISIONED_INTERVAL);
	return;
	}

	BT_DBG("");

	if (bt_mesh_is_provisioned()) {
	update_beacon_observation();
	secure_beacon_send();

	/* Only resubmit if beaconing is still enabled */
	if (bt_mesh_beacon_get() == BT_MESH_BEACON_ENABLED \|\|
	bt_mesh.ivu_initiator) {
	k_delayed_work_submit(&beacon_timer,
	PROVISIONED_INTERVAL);
	}
	} else {
	unprovisioned_beacon_send();
	k_delayed_work_submit(&beacon_timer, UNPROVISIONED_INTERVAL);
	}

	}

	static void secure_beacon_recv(struct os_mbuf *buf)
	{
	u8_t data, net_id, *auth;
	struct bt_mesh_subnet *sub;
	u32_t iv_index;
	bool new_key, kr_change, iv_change;
	u8_t flags;

	if (buf->om_len < 21) {
	BT_ERR("Too short secure beacon (len %u)", buf->om_len);
	return;
	}

	sub = cache_check(buf->om_data);
	if (sub) {
	/* We've seen this beacon before - just update the stats */
	goto update_stats;
	}

	/* So we can add to the cache if auth matches */
	data = buf->om_data;

	flags = net_buf_simple_pull_u8(buf);
	net_id = buf->om_data;
	net_buf_simple_pull(buf, 8);
	iv_index = net_buf_simple_pull_be32(buf);
	auth = buf->om_data;

	BT_DBG("flags 0x%02x id %s iv_index 0x%08x",
	flags, bt_hex(net_id, 8), iv_index);

	sub = bt_mesh_subnet_find(net_id, flags, iv_index, auth, &new_key);
	if (!sub) {
	BT_DBG("No subnet that matched beacon");
	return;
	}

	if (sub->kr_phase == BT_MESH_KR_PHASE_2 && !new_key) {
	BT_WARN("Ignoring Phase 2 KR Update secured using old key");
	return;
	}

	cache_add(data, sub);

	/* If we have NetKey0 accept initiation only from it */
	if (bt_mesh_subnet_get(BT_MESH_KEY_PRIMARY) &&
	sub->net_idx != BT_MESH_KEY_PRIMARY) {
	BT_WARN("Ignoring secure beacon on non-primary subnet");
	goto update_stats;
	}

	BT_DBG("net_idx 0x%04x iv_index 0x%08x, current iv_index 0x%08x",
	sub->net_idx, iv_index, bt_mesh.iv_index);

	if (bt_mesh.ivu_initiator &&
	bt_mesh.iv_update == BT_MESH_IV_UPDATE(flags)) {
	bt_mesh_beacon_ivu_initiator(false);
	}

	iv_change = bt_mesh_net_iv_update(iv_index, BT_MESH_IV_UPDATE(flags));

	kr_change = bt_mesh_kr_update(sub, BT_MESH_KEY_REFRESH(flags), new_key);
	if (kr_change) {
	bt_mesh_net_beacon_update(sub);
	}

	if (iv_change) {
	/* Update all subnets */
	bt_mesh_net_sec_update(NULL);
	} else if (kr_change) {
	/* Key Refresh without IV Update only impacts one subnet */
	bt_mesh_net_sec_update(sub);
	}

	update_stats:
	if (bt_mesh_beacon_get() == BT_MESH_BEACON_ENABLED &&
	sub->beacons_cur < 0xff) {
	sub->beacons_cur++;
	}
	}

	void bt_mesh_beacon_recv(struct os_mbuf *buf)
	{
	u8_t type;

	BT_DBG("%u bytes: %s", buf->om_len, bt_hex(buf->om_data, buf->om_len));

	if (buf->om_len < 1) {
	BT_ERR("Too short beacon");
	return;
	}

	type = net_buf_simple_pull_u8(buf);
	switch (type) {
	case BEACON_TYPE_UNPROVISIONED:
	BT_DBG("Ignoring unprovisioned device beacon");
	break;
	case BEACON_TYPE_SECURE:
	secure_beacon_recv(buf);
	break;
	default:
	BT_WARN("Unknown beacon type 0x%02x", type);
	break;
	}
	}

	void bt_mesh_beacon_init(void)
	{
	k_delayed_work_init(&beacon_timer, beacon_send);
	}

	void bt_mesh_beacon_ivu_initiator(bool enable)
	{
	bt_mesh.ivu_initiator = enable;

	if (enable) {
	k_work_submit(&beacon_timer.work);
	} else if (bt_mesh_beacon_get() == BT_MESH_BEACON_DISABLED) {
	k_delayed_work_cancel(&beacon_timer);
	}
	}

	void bt_mesh_beacon_enable(void)
	{
	int i;

	if (!bt_mesh_is_provisioned()) {
	k_work_submit(&beacon_timer.work);
	return;
	}

	for (i = 0; i < ARRAY_SIZE(bt_mesh.sub); i++) {
	struct bt_mesh_subnet *sub = &bt_mesh.sub[i];

	if (sub->net_idx == BT_MESH_KEY_UNUSED) {
	continue;
	}

	sub->beacons_last = 0;
	sub->beacons_cur = 0;

	bt_mesh_net_beacon_update(sub);
	}

	k_work_submit(&beacon_timer.work);
	}

	void bt_mesh_beacon_disable(void)
	{
	if (!bt_mesh.ivu_initiator) {
	k_delayed_work_cancel(&beacon_timer);
	}
	}