365 lines
9.8 KiB
C
365 lines
9.8 KiB
C
/* Bluetooth Mesh */
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/*
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* Copyright (c) 2017 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define BT_MESH_NET_FLAG_KR BIT(0)
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#define BT_MESH_NET_FLAG_IVU BIT(1)
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#define BT_MESH_KR_NORMAL 0x00
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#define BT_MESH_KR_PHASE_1 0x01
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#define BT_MESH_KR_PHASE_2 0x02
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#define BT_MESH_KR_PHASE_3 0x03
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#define BT_MESH_IV_UPDATE(flags) ((flags >> 1) & 0x01)
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#define BT_MESH_KEY_REFRESH(flags) (flags & 0x01)
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/* How many hours in between updating IVU duration */
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#define BT_MESH_IVU_MIN_HOURS 96
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#define BT_MESH_IVU_HOURS (BT_MESH_IVU_MIN_HOURS / \
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CONFIG_BT_MESH_IVU_DIVIDER)
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#define BT_MESH_IVU_TIMEOUT K_HOURS(BT_MESH_IVU_HOURS)
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struct bt_mesh_app_key {
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u16_t net_idx;
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u16_t app_idx;
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bool updated;
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struct bt_mesh_app_keys {
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u8_t id;
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u8_t val[16];
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} keys[2];
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};
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struct bt_mesh_subnet {
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u32_t beacon_sent; /* Timestamp of last sent beacon */
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u8_t beacons_last; /* Number of beacons during last
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* observation window
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*/
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u8_t beacons_cur; /* Number of beaconds observed during
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* currently ongoing window.
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*/
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u8_t beacon_cache[21]; /* Cached last authenticated beacon */
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u16_t net_idx; /* NetKeyIndex */
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bool kr_flag; /* Key Refresh Flag */
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u8_t kr_phase; /* Key Refresh Phase */
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u8_t node_id; /* Node Identity State */
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u32_t node_id_start; /* Node Identity started timestamp */
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u8_t auth[8]; /* Beacon Authentication Value */
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struct bt_mesh_subnet_keys {
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u8_t net[16]; /* NetKey */
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u8_t nid; /* NID */
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u8_t enc[16]; /* EncKey */
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u8_t net_id[8]; /* Network ID */
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#if defined(CONFIG_BT_MESH_GATT_PROXY)
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u8_t identity[16]; /* IdentityKey */
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#endif
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u8_t privacy[16]; /* PrivacyKey */
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u8_t beacon[16]; /* BeaconKey */
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} keys[2];
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};
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struct bt_mesh_rpl {
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u16_t src;
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bool old_iv;
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#if defined(CONFIG_BT_SETTINGS)
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bool store;
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#endif
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u32_t seq;
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};
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#if defined(CONFIG_BT_MESH_FRIEND)
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#define FRIEND_SEG_RX CONFIG_BT_MESH_FRIEND_SEG_RX
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#define FRIEND_SUB_LIST_SIZE CONFIG_BT_MESH_FRIEND_SUB_LIST_SIZE
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#else
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#define FRIEND_SEG_RX 0
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#define FRIEND_SUB_LIST_SIZE 0
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#endif
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struct bt_mesh_friend {
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u16_t lpn;
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u8_t recv_delay;
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u8_t fsn:1,
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send_last:1,
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pending_req:1,
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sec_update:1,
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pending_buf:1,
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valid:1,
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established:1;
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s32_t poll_to;
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u8_t num_elem;
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u16_t lpn_counter;
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u16_t counter;
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u16_t net_idx;
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u16_t sub_list[FRIEND_SUB_LIST_SIZE];
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struct k_delayed_work timer;
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struct bt_mesh_friend_seg {
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sys_slist_t queue;
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} seg[FRIEND_SEG_RX];
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struct net_buf *last;
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sys_slist_t queue;
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u32_t queue_size;
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/* Friend Clear Procedure */
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struct {
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u32_t start; /* Clear Procedure start */
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u16_t frnd; /* Previous Friend's address */
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u16_t repeat_sec; /* Repeat timeout in seconds */
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struct k_delayed_work timer; /* Repeat timer */
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} clear;
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};
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#if defined(CONFIG_BT_MESH_LOW_POWER)
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#define LPN_GROUPS CONFIG_BT_MESH_LPN_GROUPS
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#else
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#define LPN_GROUPS 0
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#endif
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/* Low Power Node state */
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struct bt_mesh_lpn {
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enum __packed {
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BT_MESH_LPN_DISABLED, /* LPN feature is disabled */
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BT_MESH_LPN_CLEAR, /* Clear in progress */
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BT_MESH_LPN_TIMER, /* Waiting for auto timer expiry */
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BT_MESH_LPN_ENABLED, /* LPN enabled, but no Friend */
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BT_MESH_LPN_REQ_WAIT, /* Wait before scanning for offers */
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BT_MESH_LPN_WAIT_OFFER, /* Friend Req sent */
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BT_MESH_LPN_ESTABLISHED, /* Friendship established */
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BT_MESH_LPN_RECV_DELAY, /* Poll sent, waiting ReceiveDelay */
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BT_MESH_LPN_WAIT_UPDATE, /* Waiting for Update or message */
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} state;
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/* Transaction Number (used for subscription list) */
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u8_t xact_next;
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u8_t xact_pending;
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u8_t sent_req;
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/* Address of our Friend when we're a LPN. Unassigned if we don't
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* have a friend yet.
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*/
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u16_t frnd;
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/* Value from the friend offer */
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u8_t recv_win;
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u8_t req_attempts; /* Number of Request attempts */
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s32_t poll_timeout;
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u8_t groups_changed:1, /* Friend Subscription List needs updating */
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pending_poll:1, /* Poll to be sent after subscription */
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disable:1, /* Disable LPN after clearing */
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fsn:1, /* Friend Sequence Number */
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established:1, /* Friendship established */
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clear_success:1; /* Friend Clear Confirm received */
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/* Friend Queue Size */
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u8_t queue_size;
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/* LPNCounter */
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u16_t counter;
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/* Previous Friend of this LPN */
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u16_t old_friend;
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/* Duration reported for last advertising packet */
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u16_t adv_duration;
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/* Next LPN related action timer */
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struct k_delayed_work timer;
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/* Subscribed groups */
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u16_t groups[LPN_GROUPS];
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/* Bit fields for tracking which groups the Friend knows about */
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ATOMIC_DEFINE(added, LPN_GROUPS);
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ATOMIC_DEFINE(pending, LPN_GROUPS);
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ATOMIC_DEFINE(to_remove, LPN_GROUPS);
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};
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/* bt_mesh_net.flags */
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enum {
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BT_MESH_VALID, /* We have been provisioned */
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BT_MESH_SUSPENDED, /* Network is temporarily suspended */
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BT_MESH_IVU_IN_PROGRESS, /* IV Update in Progress */
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BT_MESH_IVU_INITIATOR, /* IV Update initiated by us */
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BT_MESH_IVU_TEST, /* IV Update test mode */
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BT_MESH_IVU_PENDING, /* Update blocked by SDU in progress */
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/* pending storage actions, must reside within first 32 flags */
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BT_MESH_RPL_PENDING,
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BT_MESH_KEYS_PENDING,
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BT_MESH_NET_PENDING,
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BT_MESH_IV_PENDING,
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BT_MESH_SEQ_PENDING,
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BT_MESH_HB_PUB_PENDING,
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BT_MESH_CFG_PENDING,
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BT_MESH_MOD_PENDING,
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/* Don't touch - intentionally last */
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BT_MESH_FLAG_COUNT,
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};
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struct bt_mesh_net {
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u32_t iv_index; /* Current IV Index */
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u32_t seq; /* Next outgoing sequence number (24 bits) */
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ATOMIC_DEFINE(flags, BT_MESH_FLAG_COUNT);
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/* Local network interface */
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struct k_work local_work;
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sys_slist_t local_queue;
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#if defined(CONFIG_BT_MESH_FRIEND)
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/* Friend state, unique for each LPN that we're Friends for */
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struct bt_mesh_friend frnd[CONFIG_BT_MESH_FRIEND_LPN_COUNT];
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#endif
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#if defined(CONFIG_BT_MESH_LOW_POWER)
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struct bt_mesh_lpn lpn; /* Low Power Node state */
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#endif
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/* Number of hours in current IV Update state */
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u8_t ivu_duration;
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/* Timer to track duration in current IV Update state */
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struct k_delayed_work ivu_timer;
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u8_t dev_key[16];
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struct bt_mesh_app_key app_keys[CONFIG_BT_MESH_APP_KEY_COUNT];
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struct bt_mesh_subnet sub[CONFIG_BT_MESH_SUBNET_COUNT];
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struct bt_mesh_rpl rpl[CONFIG_BT_MESH_CRPL];
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};
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/* Network interface */
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enum bt_mesh_net_if {
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BT_MESH_NET_IF_ADV,
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BT_MESH_NET_IF_LOCAL,
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BT_MESH_NET_IF_PROXY,
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BT_MESH_NET_IF_PROXY_CFG,
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};
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/* Decoding context for Network/Transport data */
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struct bt_mesh_net_rx {
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struct bt_mesh_subnet *sub;
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struct bt_mesh_msg_ctx ctx;
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u32_t seq; /* Sequence Number */
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u8_t old_iv:1, /* iv_index - 1 was used */
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new_key:1, /* Data was encrypted with updated key */
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friend_cred:1, /* Data was encrypted with friend cred */
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ctl:1, /* Network Control */
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net_if:2, /* Network interface */
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local_match:1, /* Matched a local element */
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friend_match:1; /* Matched an LPN we're friends for */
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};
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/* Encoding context for Network/Transport data */
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struct bt_mesh_net_tx {
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struct bt_mesh_subnet *sub;
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struct bt_mesh_msg_ctx *ctx;
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u16_t src;
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u8_t xmit;
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u8_t friend_cred:1,
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aszmic:1,
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aid:6;
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};
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extern struct bt_mesh_net bt_mesh;
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#define BT_MESH_NET_IVI_TX (bt_mesh.iv_index - \
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atomic_test_bit(bt_mesh.flags, \
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BT_MESH_IVU_IN_PROGRESS))
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#define BT_MESH_NET_IVI_RX(rx) (bt_mesh.iv_index - (rx)->old_iv)
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#define BT_MESH_NET_HDR_LEN 9
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int bt_mesh_net_keys_create(struct bt_mesh_subnet_keys *keys,
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const u8_t key[16]);
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int bt_mesh_net_create(u16_t idx, u8_t flags, const u8_t key[16],
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u32_t iv_index);
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u8_t bt_mesh_net_flags(struct bt_mesh_subnet *sub);
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bool bt_mesh_kr_update(struct bt_mesh_subnet *sub, u8_t new_kr, bool new_key);
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void bt_mesh_net_revoke_keys(struct bt_mesh_subnet *sub);
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int bt_mesh_net_beacon_update(struct bt_mesh_subnet *sub);
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void bt_mesh_rpl_reset(void);
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bool bt_mesh_net_iv_update(u32_t iv_index, bool iv_update);
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void bt_mesh_net_sec_update(struct bt_mesh_subnet *sub);
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struct bt_mesh_subnet *bt_mesh_subnet_get(u16_t net_idx);
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struct bt_mesh_subnet *bt_mesh_subnet_find(const u8_t net_id[8], u8_t flags,
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u32_t iv_index, const u8_t auth[8],
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bool *new_key);
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int bt_mesh_net_encode(struct bt_mesh_net_tx *tx, struct net_buf_simple *buf,
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bool proxy);
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int bt_mesh_net_send(struct bt_mesh_net_tx *tx, struct net_buf *buf,
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const struct bt_mesh_send_cb *cb, void *cb_data);
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int bt_mesh_net_resend(struct bt_mesh_subnet *sub, struct net_buf *buf,
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bool new_key, const struct bt_mesh_send_cb *cb,
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void *cb_data);
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int bt_mesh_net_decode(struct net_buf_simple *data, enum bt_mesh_net_if net_if,
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struct bt_mesh_net_rx *rx, struct net_buf_simple *buf);
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void bt_mesh_net_recv(struct net_buf_simple *data, s8_t rssi,
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enum bt_mesh_net_if net_if);
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u32_t bt_mesh_next_seq(void);
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void bt_mesh_net_start(void);
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void bt_mesh_net_init(void);
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/* Friendship Credential Management */
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struct friend_cred {
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u16_t net_idx;
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u16_t addr;
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u16_t lpn_counter;
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u16_t frnd_counter;
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struct {
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u8_t nid; /* NID */
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u8_t enc[16]; /* EncKey */
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u8_t privacy[16]; /* PrivacyKey */
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} cred[2];
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};
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int friend_cred_get(struct bt_mesh_subnet *sub, u16_t addr, u8_t *nid,
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const u8_t **enc, const u8_t **priv);
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int friend_cred_set(struct friend_cred *cred, u8_t idx, const u8_t net_key[16]);
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void friend_cred_refresh(u16_t net_idx);
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int friend_cred_update(struct bt_mesh_subnet *sub);
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struct friend_cred *friend_cred_create(struct bt_mesh_subnet *sub, u16_t addr,
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u16_t lpn_counter, u16_t frnd_counter);
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void friend_cred_clear(struct friend_cred *cred);
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int friend_cred_del(u16_t net_idx, u16_t addr);
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