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OVMS3-idf/components/bt/esp_ble_mesh/mesh_core/net.c
lly a45406fe6e ble_mesh: GATT Proxy Spec 1.0.1 changes [Zephyr] 
Backport of https://github.com/apache/mynewt-nimble/pull/724

Mesh spec 1.0.1 changes proxy disabling behavior to only affect the
relaying from proxy nodes. Previously, disabling proxy would shut down
all proxy and node activity.

Tweaks from the original commit:
- Removed redundant call to bt_mesh_adv_update() in gatt_proxy_set()
- Removed invalid ref to 4.2.11.1 in node_identity_set()

---

According to Mesh Profile Spec 1.0.1, Section 4.2.11:
"If the Proxy feature is disabled, a GATT client device can connect
over GATT to that node for configuration and control. Messages from
the GATT bearer are not relayed to the advertising bearer."

Moreover some notes have been removed from the spec compared to
version 1.0:

Mesh Profile Spec 1.0, Section 4.2.11:

"Upon transition from GATT Proxy state 0x01 to GATT Proxy state 0x00
the GATT Bearer Server shall disconnect all GATT Bearer Clients."

"The Configuration Client should turn off the Proxy state as the last
step in the configuration process."

Mesh Profile Spec 1.0, Section 4.2.11.1:

"When the GATT Proxy state is set to 0x00, the Node Identity state
for all subnets shall be set to 0x00 and shall not be changed."
2020-05-13 03:40:30 +00:00

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/* Bluetooth Mesh */
/*
* Copyright (c) 2017 Intel Corporation
* Additional Copyright (c) 2018 Espressif Systems (Shanghai) PTE LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include <errno.h>
#include <stdbool.h>
#define BT_DBG_ENABLED IS_ENABLED(CONFIG_BLE_MESH_DEBUG_NET)
#include "crypto.h"
#include "adv.h"
#include "mesh.h"
#include "lpn.h"
#include "friend.h"
#include "transport.h"
#include "access.h"
#include "foundation.h"
#include "beacon.h"
#include "settings.h"
#include "prov.h"
#include "proxy_client.h"
#include "proxy_server.h"
#include "provisioner_main.h"
/* Minimum valid Mesh Network PDU length. The Network headers
* themselves take up 9 bytes. After that there is a minumum of 1 byte
* payload for both CTL=1 and CTL=0 PDUs (smallest OpCode is 1 byte). CTL=1
* PDUs must use a 64-bit (8 byte) NetMIC, whereas CTL=0 PDUs have at least
* a 32-bit (4 byte) NetMIC and AppMIC giving again a total of 8 bytes.
*/
#define BLE_MESH_NET_MIN_PDU_LEN (BLE_MESH_NET_HDR_LEN + 1 + 8)
/* Seq limit after IV Update is triggered */
#define IV_UPDATE_SEQ_LIMIT 8000000
#define IVI(pdu) ((pdu)[0] >> 7)
#define NID(pdu) ((pdu)[0] & 0x7f)
#define CTL(pdu) ((pdu)[1] >> 7)
#define TTL(pdu) ((pdu)[1] & 0x7f)
#define SEQ(pdu) (((u32_t)(pdu)[2] << 16) | \
((u32_t)(pdu)[3] << 8) | (u32_t)(pdu)[4]);
#define SRC(pdu) (sys_get_be16(&(pdu)[5]))
#define DST(pdu) (sys_get_be16(&(pdu)[7]))
/* Determine how many friendship credentials we need */
#if defined(CONFIG_BLE_MESH_FRIEND)
#define FRIEND_CRED_COUNT CONFIG_BLE_MESH_FRIEND_LPN_COUNT
#elif defined(CONFIG_BLE_MESH_LOW_POWER)
#define FRIEND_CRED_COUNT CONFIG_BLE_MESH_SUBNET_COUNT
#else
#define FRIEND_CRED_COUNT 0
#endif
#if FRIEND_CRED_COUNT > 0
static struct friend_cred friend_cred[FRIEND_CRED_COUNT];
#endif
static u64_t msg_cache[CONFIG_BLE_MESH_MSG_CACHE_SIZE];
static u16_t msg_cache_next;
/* Singleton network context (the implementation only supports one) */
struct bt_mesh_net bt_mesh = {
.local_queue = SYS_SLIST_STATIC_INIT(&bt_mesh.local_queue),
.sub = {
[0 ... (CONFIG_BLE_MESH_SUBNET_COUNT - 1)] = {
.net_idx = BLE_MESH_KEY_UNUSED,
}
},
.app_keys = {
[0 ... (CONFIG_BLE_MESH_APP_KEY_COUNT - 1)] = {
.net_idx = BLE_MESH_KEY_UNUSED,
}
},
};
static u32_t dup_cache[4];
static int dup_cache_next;
#if defined(CONFIG_BLE_MESH_RELAY_ADV_BUF)
#define BLE_MESH_MAX_STORED_RELAY_COUNT (CONFIG_BLE_MESH_RELAY_ADV_BUF_COUNT / 2)
#endif
static bool check_dup(struct net_buf_simple *data)
{
const u8_t *tail = net_buf_simple_tail(data);
u32_t val = 0U;
int i;
val = sys_get_be32(tail - 4) ^ sys_get_be32(tail - 8);
for (i = 0; i < ARRAY_SIZE(dup_cache); i++) {
if (dup_cache[i] == val) {
return true;
}
}
dup_cache[dup_cache_next++] = val;
dup_cache_next %= ARRAY_SIZE(dup_cache);
return false;
}
static u64_t msg_hash(struct bt_mesh_net_rx *rx, struct net_buf_simple *pdu)
{
u32_t hash1 = 0U, hash2 = 0U;
/* Three least significant bytes of IVI + first byte of SEQ */
hash1 = (BLE_MESH_NET_IVI_RX(rx) << 8) | pdu->data[2];
/* Two last bytes of SEQ + SRC */
memcpy(&hash2, &pdu->data[3], 4);
return (u64_t)hash1 << 32 | (u64_t)hash2;
}
static bool msg_cache_match(struct bt_mesh_net_rx *rx,
struct net_buf_simple *pdu)
{
u64_t hash = msg_hash(rx, pdu);
int i;
for (i = 0; i < ARRAY_SIZE(msg_cache); i++) {
if (msg_cache[i] == hash) {
return true;
}
}
/* Add to the cache */
rx->msg_cache_idx = msg_cache_next++;
msg_cache[rx->msg_cache_idx] = hash;
msg_cache_next %= ARRAY_SIZE(msg_cache);
return false;
}
#if CONFIG_BLE_MESH_PROVISIONER
void bt_mesh_msg_cache_clear(u16_t unicast_addr, u8_t elem_num)
{
u16_t src = 0U;
int i;
for (i = 0; i < ARRAY_SIZE(msg_cache); i++) {
src = (((u8_t)(msg_cache[i] >> 16)) << 8) | (u8_t)(msg_cache[i] >> 24);
if (src >= unicast_addr && src < unicast_addr + elem_num) {
memset(&msg_cache[i], 0x0, sizeof(msg_cache[i]));
}
}
}
#endif /* CONFIG_BLE_MESH_PROVISIONER */
struct bt_mesh_subnet *bt_mesh_subnet_get(u16_t net_idx)
{
int i;
if (net_idx == BLE_MESH_KEY_ANY) {
return &bt_mesh.sub[0];
}
for (i = 0; i < ARRAY_SIZE(bt_mesh.sub); i++) {
if (bt_mesh.sub[i].net_idx == net_idx) {
return &bt_mesh.sub[i];
}
}
return NULL;
}
int bt_mesh_net_keys_create(struct bt_mesh_subnet_keys *keys,
const u8_t key[16])
{
u8_t p[] = { 0 };
u8_t nid = 0U;
int err = 0;
err = bt_mesh_k2(key, p, sizeof(p), &nid, keys->enc, keys->privacy);
if (err) {
BT_ERR("%s, Unable to generate NID, EncKey & PrivacyKey", __func__);
return err;
}
memcpy(keys->net, key, 16);
keys->nid = nid;
BT_DBG("NID 0x%02x EncKey %s", keys->nid, bt_hex(keys->enc, 16));
BT_DBG("PrivacyKey %s", bt_hex(keys->privacy, 16));
err = bt_mesh_k3(key, keys->net_id);
if (err) {
BT_ERR("%s, Unable to generate Net ID", __func__);
return err;
}
BT_DBG("NetID %s", bt_hex(keys->net_id, 8));
#if defined(CONFIG_BLE_MESH_GATT_PROXY_SERVER)
err = bt_mesh_identity_key(key, keys->identity);
if (err) {
BT_ERR("%s, Unable to generate IdentityKey", __func__);
return err;
}
BT_DBG("IdentityKey %s", bt_hex(keys->identity, 16));
#endif /* GATT_PROXY */
err = bt_mesh_beacon_key(key, keys->beacon);
if (err) {
BT_ERR("%s, Unable to generate beacon key", __func__);
return err;
}
BT_DBG("BeaconKey %s", bt_hex(keys->beacon, 16));
return 0;
}
#if (defined(CONFIG_BLE_MESH_LOW_POWER) || \
defined(CONFIG_BLE_MESH_FRIEND))
int friend_cred_set(struct friend_cred *cred, u8_t idx, const u8_t net_key[16])
{
u16_t lpn_addr = 0U, frnd_addr = 0U;
int err = 0;
u8_t p[9] = {0};
#if defined(CONFIG_BLE_MESH_LOW_POWER)
if (cred->addr == bt_mesh.lpn.frnd) {
lpn_addr = bt_mesh_primary_addr();
frnd_addr = cred->addr;
} else {
lpn_addr = cred->addr;
frnd_addr = bt_mesh_primary_addr();
}
#else
lpn_addr = cred->addr;
frnd_addr = bt_mesh_primary_addr();
#endif
BT_DBG("LPNAddress 0x%04x FriendAddress 0x%04x", lpn_addr, frnd_addr);
BT_DBG("LPNCounter 0x%04x FriendCounter 0x%04x", cred->lpn_counter,
cred->frnd_counter);
p[0] = 0x01;
sys_put_be16(lpn_addr, p + 1);
sys_put_be16(frnd_addr, p + 3);
sys_put_be16(cred->lpn_counter, p + 5);
sys_put_be16(cred->frnd_counter, p + 7);
err = bt_mesh_k2(net_key, p, sizeof(p), &cred->cred[idx].nid,
cred->cred[idx].enc, cred->cred[idx].privacy);
if (err) {
BT_ERR("%s, Unable to generate NID, EncKey & PrivacyKey", __func__);
return err;
}
BT_DBG("Friend NID 0x%02x EncKey %s", cred->cred[idx].nid,
bt_hex(cred->cred[idx].enc, 16));
BT_DBG("Friend PrivacyKey %s", bt_hex(cred->cred[idx].privacy, 16));
return 0;
}
void friend_cred_refresh(u16_t net_idx)
{
int i;
for (i = 0; i < ARRAY_SIZE(friend_cred); i++) {
struct friend_cred *cred = &friend_cred[i];
if (cred->addr != BLE_MESH_ADDR_UNASSIGNED &&
cred->net_idx == net_idx) {
memcpy(&cred->cred[0], &cred->cred[1],
sizeof(cred->cred[0]));
}
}
}
int friend_cred_update(struct bt_mesh_subnet *sub)
{
int err = 0, i;
BT_DBG("net_idx 0x%04x", sub->net_idx);
for (i = 0; i < ARRAY_SIZE(friend_cred); i++) {
struct friend_cred *cred = &friend_cred[i];
if (cred->addr == BLE_MESH_ADDR_UNASSIGNED ||
cred->net_idx != sub->net_idx) {
continue;
}
err = friend_cred_set(cred, 1, sub->keys[1].net);
if (err) {
return err;
}
}
return 0;
}
struct friend_cred *friend_cred_create(struct bt_mesh_subnet *sub, u16_t addr,
u16_t lpn_counter, u16_t frnd_counter)
{
struct friend_cred *cred = NULL;
int i, err = 0;
BT_DBG("net_idx 0x%04x addr 0x%04x", sub->net_idx, addr);
for (cred = NULL, i = 0; i < ARRAY_SIZE(friend_cred); i++) {
if ((friend_cred[i].addr == BLE_MESH_ADDR_UNASSIGNED) ||
(friend_cred[i].addr == addr &&
friend_cred[i].net_idx == sub->net_idx)) {
cred = &friend_cred[i];
break;
}
}
if (!cred) {
BT_WARN("No free friend credential slots");
return NULL;
}
cred->net_idx = sub->net_idx;
cred->addr = addr;
cred->lpn_counter = lpn_counter;
cred->frnd_counter = frnd_counter;
err = friend_cred_set(cred, 0, sub->keys[0].net);
if (err) {
friend_cred_clear(cred);
return NULL;
}
if (sub->kr_flag) {
err = friend_cred_set(cred, 1, sub->keys[1].net);
if (err) {
friend_cred_clear(cred);
return NULL;
}
}
return cred;
}
void friend_cred_clear(struct friend_cred *cred)
{
cred->net_idx = BLE_MESH_KEY_UNUSED;
cred->addr = BLE_MESH_ADDR_UNASSIGNED;
cred->lpn_counter = 0U;
cred->frnd_counter = 0U;
(void)memset(cred->cred, 0, sizeof(cred->cred));
}
int friend_cred_del(u16_t net_idx, u16_t addr)
{
int i;
for (i = 0; i < ARRAY_SIZE(friend_cred); i++) {
struct friend_cred *cred = &friend_cred[i];
if (cred->addr == addr && cred->net_idx == net_idx) {
friend_cred_clear(cred);
return 0;
}
}
return -ENOENT;
}
int friend_cred_get(struct bt_mesh_subnet *sub, u16_t addr, u8_t *nid,
const u8_t **enc, const u8_t **priv)
{
int i;
BT_DBG("net_idx 0x%04x addr 0x%04x", sub->net_idx, addr);
for (i = 0; i < ARRAY_SIZE(friend_cred); i++) {
struct friend_cred *cred = &friend_cred[i];
if (cred->net_idx != sub->net_idx) {
continue;
}
if (addr != BLE_MESH_ADDR_UNASSIGNED && cred->addr != addr) {
continue;
}
if (nid) {
*nid = cred->cred[sub->kr_flag].nid;
}
if (enc) {
*enc = cred->cred[sub->kr_flag].enc;
}
if (priv) {
*priv = cred->cred[sub->kr_flag].privacy;
}
return 0;
}
return -ENOENT;
}
#else
int friend_cred_get(struct bt_mesh_subnet *sub, u16_t addr, u8_t *nid,
const u8_t **enc, const u8_t **priv)
{
return -ENOENT;
}
#endif /* FRIEND || LOW_POWER */
u8_t bt_mesh_net_flags(struct bt_mesh_subnet *sub)
{
u8_t flags = 0x00;
if (sub && sub->kr_flag) {
flags |= BLE_MESH_NET_FLAG_KR;
}
if (bt_mesh_atomic_test_bit(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS)) {
flags |= BLE_MESH_NET_FLAG_IVU;
}
return flags;
}
int bt_mesh_net_beacon_update(struct bt_mesh_subnet *sub)
{
u8_t flags = bt_mesh_net_flags(sub);
struct bt_mesh_subnet_keys *keys = NULL;
if (sub->kr_flag) {
BT_DBG("NetIndex %u Using new key", sub->net_idx);
keys = &sub->keys[1];
} else {
BT_DBG("NetIndex %u Using current key", sub->net_idx);
keys = &sub->keys[0];
}
BT_DBG("flags 0x%02x, IVI 0x%08x", flags, bt_mesh.iv_index);
return bt_mesh_beacon_auth(keys->beacon, flags, keys->net_id,
bt_mesh.iv_index, sub->auth);
}
int bt_mesh_net_create(u16_t idx, u8_t flags, const u8_t key[16],
u32_t iv_index)
{
struct bt_mesh_subnet *sub = NULL;
int err = 0;
BT_DBG("idx %u flags 0x%02x iv_index %u", idx, flags, iv_index);
BT_DBG("NetKey %s", bt_hex(key, 16));
(void)memset(msg_cache, 0, sizeof(msg_cache));
msg_cache_next = 0U;
sub = &bt_mesh.sub[0];
sub->kr_flag = BLE_MESH_KEY_REFRESH(flags);
if (sub->kr_flag) {
err = bt_mesh_net_keys_create(&sub->keys[1], key);
if (err) {
return -EIO;
}
sub->kr_phase = BLE_MESH_KR_PHASE_2;
} else {
err = bt_mesh_net_keys_create(&sub->keys[0], key);
if (err) {
return -EIO;
}
}
sub->net_idx = idx;
if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER)) {
sub->node_id = BLE_MESH_NODE_IDENTITY_STOPPED;
} else {
sub->node_id = BLE_MESH_NODE_IDENTITY_NOT_SUPPORTED;
}
bt_mesh.iv_index = iv_index;
bt_mesh_atomic_set_bit_to(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS,
BLE_MESH_IV_UPDATE(flags));
/* Set minimum required hours, since the 96-hour minimum requirement
* doesn't apply straight after provisioning (since we can't know how
* long has actually passed since the network changed its state).
*/
bt_mesh.ivu_duration = BLE_MESH_IVU_MIN_HOURS;
/* Make sure we have valid beacon data to be sent */
bt_mesh_net_beacon_update(sub);
return 0;
}
void bt_mesh_net_revoke_keys(struct bt_mesh_subnet *sub)
{
int i;
BT_DBG("idx 0x%04x", sub->net_idx);
memcpy(&sub->keys[0], &sub->keys[1], sizeof(sub->keys[0]));
for (i = 0; i < ARRAY_SIZE(bt_mesh.app_keys); i++) {
struct bt_mesh_app_key *key = &bt_mesh.app_keys[i];
if (key->net_idx != sub->net_idx || !key->updated) {
continue;
}
memcpy(&key->keys[0], &key->keys[1], sizeof(key->keys[0]));
key->updated = false;
}
}
bool bt_mesh_kr_update(struct bt_mesh_subnet *sub, u8_t new_kr, bool new_key)
{
if (new_kr != sub->kr_flag && sub->kr_phase == BLE_MESH_KR_NORMAL) {
BT_WARN("KR change in normal operation. Are we blacklisted?");
return false;
}
sub->kr_flag = new_kr;
if (sub->kr_flag) {
if (sub->kr_phase == BLE_MESH_KR_PHASE_1) {
BT_INFO("Phase 1 -> Phase 2");
sub->kr_phase = BLE_MESH_KR_PHASE_2;
return true;
}
} else {
switch (sub->kr_phase) {
case BLE_MESH_KR_PHASE_1:
if (!new_key) {
/* Ignore */
break;
}
/* Upon receiving a Secure Network beacon with the KR flag set
* to 0 using the new NetKey in Phase 1, the node shall
* immediately transition to Phase 3, which effectively skips
* Phase 2.
*
* Intentional fall-through.
*/
case BLE_MESH_KR_PHASE_2:
BT_INFO("KR Phase 0x%02x -> Normal", sub->kr_phase);
bt_mesh_net_revoke_keys(sub);
if (IS_ENABLED(CONFIG_BLE_MESH_LOW_POWER) ||
IS_ENABLED(CONFIG_BLE_MESH_FRIEND)) {
friend_cred_refresh(sub->net_idx);
}
sub->kr_phase = BLE_MESH_KR_NORMAL;
return true;
}
}
return false;
}
void bt_mesh_rpl_reset(void)
{
int i;
/* Discard "old old" IV Index entries from RPL and flag
* any other ones (which are valid) as old.
*/
for (i = 0; i < ARRAY_SIZE(bt_mesh.rpl); i++) {
struct bt_mesh_rpl *rpl = &bt_mesh.rpl[i];
if (rpl->src) {
if (rpl->old_iv) {
(void)memset(rpl, 0, sizeof(*rpl));
} else {
rpl->old_iv = true;
}
}
}
}
#if defined(CONFIG_BLE_MESH_IV_UPDATE_TEST)
void bt_mesh_iv_update_test(bool enable)
{
bt_mesh_atomic_set_bit_to(bt_mesh.flags, BLE_MESH_IVU_TEST, enable);
/* Reset the duration variable - needed for some PTS tests */
bt_mesh.ivu_duration = 0U;
}
bool bt_mesh_iv_update(void)
{
if (!bt_mesh_is_provisioned()) {
BT_ERR("%s, Not yet provisioned", __func__);
return false;
}
if (bt_mesh_atomic_test_bit(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS)) {
bt_mesh_net_iv_update(bt_mesh.iv_index, false);
} else {
bt_mesh_net_iv_update(bt_mesh.iv_index + 1, true);
}
bt_mesh_net_sec_update(NULL);
return bt_mesh_atomic_test_bit(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS);
}
#endif /* CONFIG_BLE_MESH_IV_UPDATE_TEST */
/* Used for sending immediate beacons to Friend queues and GATT clients */
void bt_mesh_net_sec_update(struct bt_mesh_subnet *sub)
{
if (IS_ENABLED(CONFIG_BLE_MESH_FRIEND)) {
bt_mesh_friend_sec_update(sub ? sub->net_idx : BLE_MESH_KEY_ANY);
}
if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER) &&
bt_mesh_gatt_proxy_get() == BLE_MESH_GATT_PROXY_ENABLED) {
bt_mesh_proxy_beacon_send(sub);
}
}
bool bt_mesh_net_iv_update(u32_t iv_index, bool iv_update)
{
int i;
if (bt_mesh_atomic_test_bit(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS)) {
/* We're currently in IV Update mode */
if (iv_index != bt_mesh.iv_index) {
BT_WARN("IV Index mismatch: 0x%08x != 0x%08x",
iv_index, bt_mesh.iv_index);
return false;
}
if (iv_update) {
/* Nothing to do */
BT_DBG("Already in IV Update in Progress state");
return false;
}
} else {
/* We're currently in Normal mode */
if (iv_index == bt_mesh.iv_index) {
BT_DBG("Same IV Index in normal mode");
return false;
}
if (iv_index < bt_mesh.iv_index ||
iv_index > bt_mesh.iv_index + 42) {
BT_ERR("IV Index out of sync: 0x%08x != 0x%08x",
iv_index, bt_mesh.iv_index);
return false;
}
if (iv_index > bt_mesh.iv_index + 1) {
BT_WARN("Performing IV Index Recovery");
(void)memset(bt_mesh.rpl, 0, sizeof(bt_mesh.rpl));
bt_mesh.iv_index = iv_index;
bt_mesh.seq = 0U;
goto do_update;
}
if (iv_index == bt_mesh.iv_index + 1 && !iv_update) {
BT_WARN("Ignoring new index in normal mode");
return false;
}
if (!iv_update) {
/* Nothing to do */
BT_DBG("Already in Normal state");
return false;
}
}
if (!(IS_ENABLED(CONFIG_BLE_MESH_IV_UPDATE_TEST) &&
bt_mesh_atomic_test_bit(bt_mesh.flags, BLE_MESH_IVU_TEST))) {
if (bt_mesh.ivu_duration < BLE_MESH_IVU_MIN_HOURS) {
BT_WARN("IV Update before minimum duration");
return false;
}
}
/* Defer change to Normal Operation if there are pending acks */
if (!iv_update && bt_mesh_tx_in_progress()) {
BT_WARN("IV Update deferred because of pending transfer");
bt_mesh_atomic_set_bit(bt_mesh.flags, BLE_MESH_IVU_PENDING);
return false;
}
do_update:
bt_mesh_atomic_set_bit_to(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS, iv_update);
bt_mesh.ivu_duration = 0U;
if (iv_update) {
bt_mesh.iv_index = iv_index;
BT_INFO("IV Update state entered. New index 0x%08x",
bt_mesh.iv_index);
bt_mesh_rpl_reset();
} else {
BT_INFO("Normal mode entered");
bt_mesh.seq = 0U;
}
k_delayed_work_submit(&bt_mesh.ivu_timer, BLE_MESH_IVU_TIMEOUT);
size_t subnet_size = bt_mesh_rx_netkey_size();
for (i = 0; i < subnet_size; i++) {
struct bt_mesh_subnet *sub = bt_mesh_rx_netkey_get(i);
if (sub && sub->net_idx != BLE_MESH_KEY_UNUSED) {
bt_mesh_net_beacon_update(sub);
}
}
if (IS_ENABLED(CONFIG_BLE_MESH_SETTINGS)) {
bt_mesh_store_iv(false);
}
return true;
}
bool bt_mesh_primary_subnet_exist(void)
{
if (IS_ENABLED(CONFIG_BLE_MESH_NODE) && bt_mesh_is_provisioned()) {
if (bt_mesh_subnet_get(BLE_MESH_KEY_PRIMARY)) {
return true;
}
} else if (IS_ENABLED(CONFIG_BLE_MESH_PROVISIONER) && bt_mesh_is_provisioner_en()) {
if (bt_mesh_provisioner_subnet_get(BLE_MESH_KEY_PRIMARY)) {
return true;
}
}
return false;
}
u32_t bt_mesh_next_seq(void)
{
u32_t seq = bt_mesh.seq++;
if (IS_ENABLED(CONFIG_BLE_MESH_SETTINGS)) {
bt_mesh_store_seq();
}
if (!bt_mesh_atomic_test_bit(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS) &&
bt_mesh.seq > IV_UPDATE_SEQ_LIMIT &&
bt_mesh_primary_subnet_exist()) {
bt_mesh_beacon_ivu_initiator(true);
bt_mesh_net_iv_update(bt_mesh.iv_index + 1, true);
bt_mesh_net_sec_update(NULL);
}
return seq;
}
int bt_mesh_net_resend(struct bt_mesh_subnet *sub, struct net_buf *buf,
bool new_key, const struct bt_mesh_send_cb *cb,
void *cb_data)
{
const u8_t *enc = NULL, *priv = NULL;
u32_t seq = 0U;
u16_t dst = 0U;
int err = 0;
BT_DBG("net_idx 0x%04x new_key %u len %u", sub->net_idx, new_key,
buf->len);
enc = sub->keys[new_key].enc;
priv = sub->keys[new_key].privacy;
err = bt_mesh_net_obfuscate(buf->data, BLE_MESH_NET_IVI_TX, priv);
if (err) {
BT_ERR("%s, Deobfuscate failed (err %d)", __func__, err);
return err;
}
err = bt_mesh_net_decrypt(enc, &buf->b, BLE_MESH_NET_IVI_TX, false);
if (err) {
BT_ERR("%s, Decrypt failed (err %d)", __func__, err);
return err;
}
/* Update with a new sequence number */
seq = bt_mesh_next_seq();
buf->data[2] = seq >> 16;
buf->data[3] = seq >> 8;
buf->data[4] = seq;
/* Get destination, in case it's a proxy client */
dst = DST(buf->data);
err = bt_mesh_net_encrypt(enc, &buf->b, BLE_MESH_NET_IVI_TX, false);
if (err) {
BT_ERR("%s, Encrypt failed (err %d)", __func__, err);
return err;
}
err = bt_mesh_net_obfuscate(buf->data, BLE_MESH_NET_IVI_TX, priv);
if (err) {
BT_ERR("%s, Obfuscate failed (err %d)", __func__, err);
return err;
}
if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER) &&
bt_mesh_proxy_relay(&buf->b, dst)) {
send_cb_finalize(cb, cb_data);
return 0;
}
bt_mesh_adv_send(buf, cb, cb_data);
return 0;
}
static void bt_mesh_net_local(struct k_work *work)
{
struct net_buf *buf = NULL;
while ((buf = net_buf_slist_get(&bt_mesh.local_queue))) {
BT_DBG("len %u: %s", buf->len, bt_hex(buf->data, buf->len));
bt_mesh_net_recv(&buf->b, 0, BLE_MESH_NET_IF_LOCAL);
net_buf_unref(buf);
}
}
int bt_mesh_net_encode(struct bt_mesh_net_tx *tx, struct net_buf_simple *buf,
bool proxy)
{
const bool ctl = (tx->ctx->app_idx == BLE_MESH_KEY_UNUSED);
u32_t seq_val = 0U;
u8_t nid = 0U;
const u8_t *enc = NULL, *priv = NULL;
u8_t *seq = NULL;
int err = 0;
if (ctl && net_buf_simple_tailroom(buf) < 8) {
BT_ERR("%s, Insufficient MIC space for CTL PDU", __func__);
return -EINVAL;
} else if (net_buf_simple_tailroom(buf) < 4) {
BT_ERR("%s, Insufficient MIC space for PDU", __func__);
return -EINVAL;
}
BT_DBG("src 0x%04x dst 0x%04x ctl %u seq 0x%06x",
tx->src, tx->ctx->addr, ctl, bt_mesh.seq);
net_buf_simple_push_be16(buf, tx->ctx->addr);
net_buf_simple_push_be16(buf, tx->src);
seq = net_buf_simple_push(buf, 3);
seq_val = bt_mesh_next_seq();
seq[0] = seq_val >> 16;
seq[1] = seq_val >> 8;
seq[2] = seq_val;
if (ctl) {
net_buf_simple_push_u8(buf, tx->ctx->send_ttl | 0x80);
} else {
net_buf_simple_push_u8(buf, tx->ctx->send_ttl);
}
if (IS_ENABLED(CONFIG_BLE_MESH_LOW_POWER) && tx->friend_cred) {
if (friend_cred_get(tx->sub, BLE_MESH_ADDR_UNASSIGNED,
&nid, &enc, &priv)) {
BT_WARN("Falling back to master credentials");
tx->friend_cred = 0U;
nid = tx->sub->keys[tx->sub->kr_flag].nid;
enc = tx->sub->keys[tx->sub->kr_flag].enc;
priv = tx->sub->keys[tx->sub->kr_flag].privacy;
}
} else {
tx->friend_cred = 0U;
nid = tx->sub->keys[tx->sub->kr_flag].nid;
enc = tx->sub->keys[tx->sub->kr_flag].enc;
priv = tx->sub->keys[tx->sub->kr_flag].privacy;
}
net_buf_simple_push_u8(buf, (nid | (BLE_MESH_NET_IVI_TX & 1) << 7));
err = bt_mesh_net_encrypt(enc, buf, BLE_MESH_NET_IVI_TX, proxy);
if (err) {
return err;
}
return bt_mesh_net_obfuscate(buf->data, BLE_MESH_NET_IVI_TX, priv);
}
int bt_mesh_net_send(struct bt_mesh_net_tx *tx, struct net_buf *buf,
const struct bt_mesh_send_cb *cb, void *cb_data)
{
int err = 0;
BT_DBG("src 0x%04x dst 0x%04x len %u headroom %u tailroom %u",
tx->src, tx->ctx->addr, buf->len, net_buf_headroom(buf),
net_buf_tailroom(buf));
BT_DBG("Payload len %u: %s", buf->len, bt_hex(buf->data, buf->len));
BT_DBG("Seq 0x%06x", bt_mesh.seq);
if (tx->ctx->send_ttl == BLE_MESH_TTL_DEFAULT) {
tx->ctx->send_ttl = bt_mesh_default_ttl_get();
}
err = bt_mesh_net_encode(tx, &buf->b, false);
if (err) {
goto done;
}
/* Deliver to GATT Proxy Clients if necessary. Mesh spec 3.4.5.2:
* "The output filter of the interface connected to advertising or
* GATT bearers shall drop all messages with TTL value set to 1."
*/
if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER) &&
tx->ctx->send_ttl != 1U) {
if (bt_mesh_proxy_relay(&buf->b, tx->ctx->addr) &&
BLE_MESH_ADDR_IS_UNICAST(tx->ctx->addr)) {
/* Notify completion if this only went
* through the Mesh Proxy.
*/
send_cb_finalize(cb, cb_data);
err = 0;
goto done;
}
}
#if CONFIG_BLE_MESH_GATT_PROXY_CLIENT
if (tx->ctx->send_ttl != 1U) {
if (bt_mesh_proxy_client_send(&buf->b, tx->ctx->addr)) {
/* If Proxy Client succeeds to send messages with GATT bearer,
* we can directly finish here. And if not, which means no
* connection has been created with Proxy Client, here we will
* use advertising bearer for the messages.
*/
send_cb_finalize(cb, cb_data);
err = 0;
goto done;
}
}
#endif
/* Deliver to local network interface if necessary */
if (IS_ENABLED(CONFIG_BLE_MESH_NODE) && bt_mesh_is_provisioned() &&
(bt_mesh_fixed_group_match(tx->ctx->addr) ||
bt_mesh_elem_find(tx->ctx->addr))) {
if (cb && cb->start) {
cb->start(0, 0, cb_data);
}
net_buf_slist_put(&bt_mesh.local_queue, net_buf_ref(buf));
if (cb && cb->end) {
cb->end(0, cb_data);
}
k_work_submit(&bt_mesh.local_work);
} else if (tx->ctx->send_ttl != 1U) {
/* Deliver to the advertising network interface. Mesh spec
* 3.4.5.2: "The output filter of the interface connected to
* advertising or GATT bearers shall drop all messages with
* TTL value set to 1."
*/
bt_mesh_adv_send(buf, cb, cb_data);
}
done:
net_buf_unref(buf);
return err;
}
static bool auth_match(struct bt_mesh_subnet_keys *keys,
const u8_t net_id[8], u8_t flags,
u32_t iv_index, const u8_t auth[8])
{
u8_t net_auth[8] = {0};
if (memcmp(net_id, keys->net_id, 8)) {
return false;
}
bt_mesh_beacon_auth(keys->beacon, flags, keys->net_id, iv_index,
net_auth);
if (memcmp(auth, net_auth, 8)) {
BT_WARN("Authentication Value %s != %s",
bt_hex(auth, 8), bt_hex(net_auth, 8));
return false;
}
return true;
}
struct bt_mesh_subnet *bt_mesh_subnet_find(const u8_t net_id[8], u8_t flags,
u32_t iv_index, const u8_t auth[8],
bool *new_key)
{
size_t subnet_size = 0U;
int i;
subnet_size = bt_mesh_rx_netkey_size();
for (i = 0; i < subnet_size; i++) {
struct bt_mesh_subnet *sub = bt_mesh_rx_netkey_get(i);
if (sub == NULL || sub->net_idx == BLE_MESH_KEY_UNUSED) {
continue;
}
if (auth_match(&sub->keys[0], net_id, flags, iv_index, auth)) {
*new_key = false;
return sub;
}
if (sub->kr_phase == BLE_MESH_KR_NORMAL) {
continue;
}
if (auth_match(&sub->keys[1], net_id, flags, iv_index, auth)) {
*new_key = true;
return sub;
}
}
return NULL;
}
static int net_decrypt(struct bt_mesh_subnet *sub, const u8_t *enc,
const u8_t *priv, const u8_t *data,
size_t data_len, struct bt_mesh_net_rx *rx,
struct net_buf_simple *buf)
{
BT_DBG("NID 0x%02x net_idx 0x%04x", NID(data), sub->net_idx);
BT_DBG("IVI %u net->iv_index 0x%08x", IVI(data), bt_mesh.iv_index);
rx->old_iv = (IVI(data) != (bt_mesh.iv_index & 0x01));
net_buf_simple_reset(buf);
memcpy(net_buf_simple_add(buf, data_len), data, data_len);
if (bt_mesh_net_obfuscate(buf->data, BLE_MESH_NET_IVI_RX(rx), priv)) {
return -ENOENT;
}
if (rx->net_if == BLE_MESH_NET_IF_ADV && msg_cache_match(rx, buf)) {
BT_WARN("Duplicate found in Network Message Cache");
return -EALREADY;
}
rx->ctx.addr = SRC(buf->data);
if (!BLE_MESH_ADDR_IS_UNICAST(rx->ctx.addr)) {
BT_WARN("Ignoring non-unicast src addr 0x%04x", rx->ctx.addr);
return -EINVAL;
}
BT_DBG("src 0x%04x", rx->ctx.addr);
if (IS_ENABLED(CONFIG_BLE_MESH_PROXY) &&
rx->net_if == BLE_MESH_NET_IF_PROXY_CFG) {
return bt_mesh_net_decrypt(enc, buf, BLE_MESH_NET_IVI_RX(rx),
true);
}
return bt_mesh_net_decrypt(enc, buf, BLE_MESH_NET_IVI_RX(rx), false);
}
#if (defined(CONFIG_BLE_MESH_LOW_POWER) || \
defined(CONFIG_BLE_MESH_FRIEND))
static int friend_decrypt(struct bt_mesh_subnet *sub, const u8_t *data,
size_t data_len, struct bt_mesh_net_rx *rx,
struct net_buf_simple *buf)
{
int i;
BT_DBG("NID 0x%02x net_idx 0x%04x", NID(data), sub->net_idx);
for (i = 0; i < ARRAY_SIZE(friend_cred); i++) {
struct friend_cred *cred = &friend_cred[i];
if (cred->net_idx != sub->net_idx) {
continue;
}
if (NID(data) == cred->cred[0].nid &&
!net_decrypt(sub, cred->cred[0].enc, cred->cred[0].privacy,
data, data_len, rx, buf)) {
return 0;
}
if (sub->kr_phase == BLE_MESH_KR_NORMAL) {
continue;
}
if (NID(data) == cred->cred[1].nid &&
!net_decrypt(sub, cred->cred[1].enc, cred->cred[1].privacy,
data, data_len, rx, buf)) {
rx->new_key = 1U;
return 0;
}
}
return -ENOENT;
}
#endif
static bool net_find_and_decrypt(const u8_t *data, size_t data_len,
struct bt_mesh_net_rx *rx,
struct net_buf_simple *buf)
{
struct bt_mesh_subnet *sub = NULL;
size_t array_size = 0U;
int i;
BT_DBG("%s", __func__);
array_size = bt_mesh_rx_netkey_size();
for (i = 0; i < array_size; i++) {
sub = bt_mesh_rx_netkey_get(i);
if (!sub) {
BT_DBG("%s, NULL subnet", __func__);
continue;
}
if (sub->net_idx == BLE_MESH_KEY_UNUSED) {
continue;
}
#if (defined(CONFIG_BLE_MESH_LOW_POWER) || defined(CONFIG_BLE_MESH_FRIEND))
if (!friend_decrypt(sub, data, data_len, rx, buf)) {
rx->friend_cred = 1;
rx->ctx.net_idx = sub->net_idx;
rx->sub = sub;
return true;
}
#endif
if (NID(data) == sub->keys[0].nid &&
!net_decrypt(sub, sub->keys[0].enc, sub->keys[0].privacy,
data, data_len, rx, buf)) {
rx->ctx.net_idx = sub->net_idx;
rx->sub = sub;
return true;
}
if (sub->kr_phase == BLE_MESH_KR_NORMAL) {
continue;
}
if (NID(data) == sub->keys[1].nid &&
!net_decrypt(sub, sub->keys[1].enc, sub->keys[1].privacy,
data, data_len, rx, buf)) {
rx->new_key = 1U;
rx->ctx.net_idx = sub->net_idx;
rx->sub = sub;
return true;
}
}
return false;
}
/* Relaying from advertising to the advertising bearer should only happen
* if the Relay state is set to enabled. Locally originated packets always
* get sent to the advertising bearer. If the packet came in through GATT,
* then we should only relay it if the GATT Proxy state is enabled.
*/
static bool relay_to_adv(enum bt_mesh_net_if net_if)
{
switch (net_if) {
case BLE_MESH_NET_IF_LOCAL:
return true;
case BLE_MESH_NET_IF_ADV:
return (bt_mesh_relay_get() == BLE_MESH_RELAY_ENABLED);
case BLE_MESH_NET_IF_PROXY:
return (bt_mesh_gatt_proxy_get() == BLE_MESH_GATT_PROXY_ENABLED);
default:
return false;
}
}
static void bt_mesh_net_relay(struct net_buf_simple *sbuf,
struct bt_mesh_net_rx *rx)
{
const u8_t *enc = NULL, *priv = NULL;
struct net_buf *buf = NULL;
u8_t nid = 0U, transmit = 0U;
if (rx->net_if == BLE_MESH_NET_IF_LOCAL) {
/* Locally originated PDUs with TTL=1 will only be delivered
* to local elements as per Mesh Profile 1.0 section 3.4.5.2:
* "The output filter of the interface connected to
* advertising or GATT bearers shall drop all messages with
* TTL value set to 1."
*/
if (rx->ctx.recv_ttl == 1U) {
return;
}
} else {
if (rx->ctx.recv_ttl <= 1U) {
return;
}
}
if (rx->net_if == BLE_MESH_NET_IF_ADV &&
bt_mesh_relay_get() != BLE_MESH_RELAY_ENABLED &&
bt_mesh_gatt_proxy_get() != BLE_MESH_GATT_PROXY_ENABLED) {
return;
}
BT_DBG("TTL %u CTL %u dst 0x%04x", rx->ctx.recv_ttl, rx->ctl,
rx->ctx.recv_dst);
/* The Relay Retransmit state is only applied to adv-adv relaying.
* Anything else (like GATT to adv, or locally originated packets)
* use the Network Transmit state.
*/
if (rx->net_if == BLE_MESH_NET_IF_ADV) {
transmit = bt_mesh_relay_retransmit_get();
} else {
transmit = bt_mesh_net_transmit_get();
}
/**
* When the node tries to relay a Segment ACK message, in this case
* the corresponding segment packets (if exist) can be removed from
* the relay queue.
*/
#if !defined(CONFIG_BLE_MESH_RELAY_ADV_BUF)
buf = bt_mesh_adv_create(BLE_MESH_ADV_DATA, transmit, K_NO_WAIT);
#else
/**
* Check if the number of relay packets in queue is too large, if so
* use minimum relay retransmit value for later relay packets.
*/
if (bt_mesh_get_stored_relay_count() >= BLE_MESH_MAX_STORED_RELAY_COUNT) {
transmit = BLE_MESH_TRANSMIT(0, 20);
}
buf = bt_mesh_relay_adv_create(BLE_MESH_ADV_DATA, transmit, K_NO_WAIT);
#endif
if (!buf) {
BT_ERR("%s, Out of relay buffers", __func__);
return;
}
/* Only decrement TTL for non-locally originated packets */
if (rx->net_if != BLE_MESH_NET_IF_LOCAL) {
/* Leave CTL bit intact */
sbuf->data[1] &= 0x80;
sbuf->data[1] |= rx->ctx.recv_ttl - 1U;
}
net_buf_add_mem(buf, sbuf->data, sbuf->len);
enc = rx->sub->keys[rx->sub->kr_flag].enc;
priv = rx->sub->keys[rx->sub->kr_flag].privacy;
nid = rx->sub->keys[rx->sub->kr_flag].nid;
BT_DBG("Relaying packet. TTL is now %u", TTL(buf->data));
/* Update NID if RX or RX was with friend credentials */
if (rx->friend_cred) {
buf->data[0] &= 0x80; /* Clear everything except IVI */
buf->data[0] |= nid;
}
/* We re-encrypt and obfuscate using the received IVI rather than
* the normal TX IVI (which may be different) since the transport
* layer nonce includes the IVI.
*/
if (bt_mesh_net_encrypt(enc, &buf->b, BLE_MESH_NET_IVI_RX(rx), false)) {
BT_ERR("%s, Re-encrypting failed", __func__);
goto done;
}
if (bt_mesh_net_obfuscate(buf->data, BLE_MESH_NET_IVI_RX(rx), priv)) {
BT_ERR("%s, Re-obfuscating failed", __func__);
goto done;
}
/* Sending to the GATT bearer should only happen if GATT Proxy
* is enabled or the message originates from the local node.
*/
if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER) &&
(bt_mesh_gatt_proxy_get() == BLE_MESH_GATT_PROXY_ENABLED ||
rx->net_if == BLE_MESH_NET_IF_LOCAL)) {
if (bt_mesh_proxy_relay(&buf->b, rx->ctx.recv_dst) &&
BLE_MESH_ADDR_IS_UNICAST(rx->ctx.recv_dst)) {
goto done;
}
}
if (relay_to_adv(rx->net_if)) {
#if !defined(CONFIG_BLE_MESH_RELAY_ADV_BUF)
bt_mesh_adv_send(buf, NULL, NULL);
#else
bt_mesh_relay_adv_send(buf, NULL, NULL, rx->ctx.addr, rx->ctx.recv_dst);
#endif
}
done:
net_buf_unref(buf);
}
void bt_mesh_net_header_parse(struct net_buf_simple *buf,
struct bt_mesh_net_rx *rx)
{
rx->old_iv = (IVI(buf->data) != (bt_mesh.iv_index & 0x01));
rx->ctl = CTL(buf->data);
rx->ctx.recv_ttl = TTL(buf->data);
rx->seq = SEQ(buf->data);
rx->ctx.addr = SRC(buf->data);
rx->ctx.recv_dst = DST(buf->data);
}
int bt_mesh_net_decode(struct net_buf_simple *data, enum bt_mesh_net_if net_if,
struct bt_mesh_net_rx *rx, struct net_buf_simple *buf)
{
if (data->len < BLE_MESH_NET_MIN_PDU_LEN) {
BT_WARN("Dropping too short mesh packet (len %u)", data->len);
BT_WARN("%s", bt_hex(data->data, data->len));
return -EINVAL;
}
if (net_if == BLE_MESH_NET_IF_ADV && check_dup(data)) {
return -EINVAL;
}
BT_DBG("%u bytes: %s", data->len, bt_hex(data->data, data->len));
rx->net_if = net_if;
if (!net_find_and_decrypt(data->data, data->len, rx, buf)) {
BT_DBG("Unable to find matching net for packet");
return -ENOENT;
}
/* Initialize AppIdx to a sane value */
rx->ctx.app_idx = BLE_MESH_KEY_UNUSED;
rx->ctx.recv_ttl = TTL(buf->data);
/* Default to responding with TTL 0 for non-routed messages */
if (rx->ctx.recv_ttl == 0U) {
rx->ctx.send_ttl = 0U;
} else {
rx->ctx.send_ttl = BLE_MESH_TTL_DEFAULT;
}
rx->ctl = CTL(buf->data);
rx->seq = SEQ(buf->data);
rx->ctx.recv_dst = DST(buf->data);
BT_DBG("Decryption successful. Payload len %u", buf->len);
if (net_if != BLE_MESH_NET_IF_PROXY_CFG &&
rx->ctx.recv_dst == BLE_MESH_ADDR_UNASSIGNED) {
BT_ERR("%s, Destination address is unassigned; dropping packet", __func__);
return -EBADMSG;
}
if (BLE_MESH_ADDR_IS_RFU(rx->ctx.recv_dst)) {
BT_ERR("%s, Destination address is RFU; dropping packet", __func__);
return -EBADMSG;
}
if (net_if != BLE_MESH_NET_IF_LOCAL && bt_mesh_elem_find(rx->ctx.addr)) {
BT_DBG("Dropping locally originated packet");
return -EBADMSG;
}
BT_DBG("src 0x%04x dst 0x%04x ttl %u", rx->ctx.addr, rx->ctx.recv_dst,
rx->ctx.recv_ttl);
BT_DBG("PDU: %s", bt_hex(buf->data, buf->len));
return 0;
}
static bool ready_to_recv(void)
{
if (IS_ENABLED(CONFIG_BLE_MESH_NODE) && bt_mesh_is_provisioned()) {
return true;
} else if (IS_ENABLED(CONFIG_BLE_MESH_PROVISIONER) && bt_mesh_is_provisioner_en()) {
if (bt_mesh_provisioner_get_node_count()) {
return true;
}
}
return false;
}
static bool ignore_net_msg(u16_t src, u16_t dst)
{
if (IS_ENABLED(CONFIG_BLE_MESH_PROVISIONER) &&
bt_mesh_is_provisioner_en() &&
BLE_MESH_ADDR_IS_UNICAST(dst) &&
bt_mesh_elem_find(dst)) {
/* If the destination address of the message is the element
* address of Provisioner, but Provisioner fails to find the
* node in its provisioning database, then this message will
* be ignored.
*/
if (!bt_mesh_provisioner_get_node_with_addr(src)) {
return true;
}
}
return false;
}
void bt_mesh_net_recv(struct net_buf_simple *data, s8_t rssi,
enum bt_mesh_net_if net_if)
{
NET_BUF_SIMPLE_DEFINE(buf, 29);
struct bt_mesh_net_rx rx = { .ctx.recv_rssi = rssi };
struct net_buf_simple_state state = {0};
BT_DBG("rssi %d net_if %u", rssi, net_if);
if (!ready_to_recv()) {
return;
}
if (bt_mesh_net_decode(data, net_if, &rx, &buf)) {
return;
}
if (ignore_net_msg(rx.ctx.addr, rx.ctx.recv_dst)) {
return;
}
/* Save the state so the buffer can later be relayed */
net_buf_simple_save(&buf, &state);
rx.local_match = (bt_mesh_fixed_group_match(rx.ctx.recv_dst) ||
bt_mesh_elem_find(rx.ctx.recv_dst));
if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER) &&
net_if == BLE_MESH_NET_IF_PROXY) {
bt_mesh_proxy_addr_add(data, rx.ctx.addr);
if (bt_mesh_gatt_proxy_get() == BLE_MESH_GATT_PROXY_DISABLED &&
!rx.local_match) {
BT_INFO("Proxy is disabled; ignoring message");
return;
}
}
/* The transport layer has indicated that it has rejected the message,
* but would like to see it again if it is received in the future.
* This can happen if a message is received when the device is in
* Low Power mode, but the message was not encrypted with the friend
* credentials. Remove it from the message cache so that we accept
* it again in the future.
*/
if (bt_mesh_trans_recv(&buf, &rx) == -EAGAIN) {
BT_WARN("Removing rejected message from Network Message Cache");
msg_cache[rx.msg_cache_idx] = 0ULL;
/* Rewind the next index now that we're not using this entry */
msg_cache_next = rx.msg_cache_idx;
}
/* Relay if this was a group/virtual address, or if the destination
* was neither a local element nor an LPN we're Friends for.
*/
if (IS_ENABLED(CONFIG_BLE_MESH_RELAY) &&
(!BLE_MESH_ADDR_IS_UNICAST(rx.ctx.recv_dst) ||
(!rx.local_match && !rx.friend_match))) {
net_buf_simple_restore(&buf, &state);
bt_mesh_net_relay(&buf, &rx);
}
}
static void ivu_refresh(struct k_work *work)
{
bt_mesh.ivu_duration += BLE_MESH_IVU_HOURS;
BT_INFO("%s for %u hour%s",
bt_mesh_atomic_test_bit(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS) ?
"IVU in Progress" : "IVU Normal mode",
bt_mesh.ivu_duration, bt_mesh.ivu_duration == 1U ? "" : "s");
if (bt_mesh.ivu_duration < BLE_MESH_IVU_MIN_HOURS) {
if (IS_ENABLED(CONFIG_BLE_MESH_SETTINGS)) {
bt_mesh_store_iv(true);
}
k_delayed_work_submit(&bt_mesh.ivu_timer, BLE_MESH_IVU_TIMEOUT);
return;
}
if (bt_mesh_atomic_test_bit(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS)) {
bt_mesh_beacon_ivu_initiator(true);
bt_mesh_net_iv_update(bt_mesh.iv_index, false);
} else if (IS_ENABLED(CONFIG_BLE_MESH_SETTINGS)) {
bt_mesh_store_iv(true);
}
}
void bt_mesh_net_start(void)
{
if (bt_mesh_beacon_get() == BLE_MESH_BEACON_ENABLED) {
bt_mesh_beacon_enable();
} else {
bt_mesh_beacon_disable();
}
if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER) &&
bt_mesh_gatt_proxy_get() != BLE_MESH_GATT_PROXY_NOT_SUPPORTED) {
bt_mesh_proxy_gatt_enable();
bt_mesh_adv_update();
}
#if defined(CONFIG_BLE_MESH_USE_DUPLICATE_SCAN)
/* Add Mesh beacon type (Secure Network Beacon) to the exceptional list */
bt_mesh_update_exceptional_list(BLE_MESH_EXCEP_LIST_ADD,
BLE_MESH_EXCEP_INFO_MESH_BEACON, NULL);
#endif
if (IS_ENABLED(CONFIG_BLE_MESH_LOW_POWER)) {
/* TODO: Enable duplicate scan in Low Power Mode */
bt_mesh_lpn_init();
} else {
bt_mesh_scan_enable();
}
if (IS_ENABLED(CONFIG_BLE_MESH_FRIEND)) {
bt_mesh_friend_init();
}
if (IS_ENABLED(CONFIG_BLE_MESH_PROV)) {
u16_t net_idx = bt_mesh.sub[0].net_idx;
u16_t addr = bt_mesh_primary_addr();
u32_t iv_index = bt_mesh.iv_index;
u8_t flags = (u8_t)bt_mesh.sub[0].kr_flag;
const u8_t *net_key = bt_mesh.sub[0].keys[flags].net;
if (bt_mesh_atomic_test_bit(bt_mesh.flags, BLE_MESH_IVU_IN_PROGRESS)) {
flags |= BLE_MESH_NET_FLAG_IVU;
}
bt_mesh_prov_complete(net_idx, net_key, addr, flags, iv_index);
}
}
void bt_mesh_net_init(void)
{
k_delayed_work_init(&bt_mesh.ivu_timer, ivu_refresh);
k_work_init(&bt_mesh.local_work, bt_mesh_net_local);
}
void bt_mesh_net_deinit(bool erase)
{
k_delayed_work_free(&bt_mesh.ivu_timer);
k_work_init(&bt_mesh.local_work, NULL);
/* Local queue uses a while loop, currently no need
* to handle this.
*/
#if FRIEND_CRED_COUNT > 0
memset(friend_cred, 0, sizeof(friend_cred));
#endif
memset(msg_cache, 0, sizeof(msg_cache));
msg_cache_next = 0U;
memset(dup_cache, 0, sizeof(dup_cache));
dup_cache_next = 0U;
bt_mesh.iv_index = 0U;
bt_mesh.seq = 0U;
memset(bt_mesh.flags, 0, sizeof(bt_mesh.flags));
if (erase && IS_ENABLED(CONFIG_BLE_MESH_SETTINGS)) {
bt_mesh_clear_seq();
bt_mesh_clear_iv();
}
}
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