338 lines
9.3 KiB
C
338 lines
9.3 KiB
C
/*
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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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#include "adv.h"
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#include "subnet.h"
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#include <zephyr/bluetooth/mesh/sar_cfg.h>
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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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/* Minimum valid Mesh Network PDU length. The Network headers
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* themselves take up 9 bytes. After that there is a minimum of 1 byte
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* payload for both CTL=1 and CTL=0 PDUs (smallest OpCode is 1 byte). CTL=1
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* PDUs must use a 64-bit (8 byte) NetMIC, whereas CTL=0 PDUs have at least
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* a 32-bit (4 byte) NetMIC and AppMIC giving again a total of 8 bytes.
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*/
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#define BT_MESH_NET_MIN_PDU_LEN (BT_MESH_NET_HDR_LEN + 1 + 8)
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/* Maximum valid Mesh Network PDU length. The longest packet can either be a
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* transport control message (CTL=1) of 12 bytes + 8 bytes of NetMIC, or an
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* access message (CTL=0) of 16 bytes + 4 bytes of NetMIC.
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*/
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#define BT_MESH_NET_MAX_PDU_LEN (BT_MESH_NET_HDR_LEN + 16 + 4)
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struct bt_mesh_net_cred;
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enum bt_mesh_nonce_type;
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struct bt_mesh_node {
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uint16_t addr;
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uint16_t net_idx;
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struct bt_mesh_key dev_key;
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uint8_t num_elem;
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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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uint16_t lpn;
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uint8_t recv_delay;
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uint8_t fsn:1,
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send_last:1,
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pending_req:1,
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pending_buf:1,
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established:1;
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int32_t poll_to;
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uint8_t num_elem;
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uint16_t lpn_counter;
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uint16_t counter;
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struct bt_mesh_subnet *subnet;
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struct bt_mesh_net_cred cred[2];
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uint16_t sub_list[FRIEND_SUB_LIST_SIZE];
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struct k_work_delayable timer;
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struct bt_mesh_friend_seg {
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sys_slist_t queue;
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/* The target number of segments, i.e. not necessarily
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* the current number of segments, in the queue. This is
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* used for Friend Queue free space calculations.
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*/
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uint8_t seg_count;
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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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uint32_t queue_size;
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/* Friend Clear Procedure */
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struct {
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uint32_t start; /* Clear Procedure start */
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uint16_t frnd; /* Previous Friend's address */
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uint16_t repeat_sec; /* Repeat timeout in seconds */
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struct k_work_delayable 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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uint8_t xact_next;
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uint8_t xact_pending;
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uint8_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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uint16_t frnd;
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/* Value from the friend offer */
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uint8_t recv_win;
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uint8_t req_attempts; /* Number of Request attempts */
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int32_t poll_timeout;
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uint8_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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uint8_t queue_size;
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/* FriendCounter */
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uint16_t frnd_counter;
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/* LPNCounter */
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uint16_t lpn_counter;
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/* Previous Friend of this LPN */
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uint16_t old_friend;
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/* Duration reported for last advertising packet */
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uint16_t adv_duration;
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/* Advertising start time. */
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uint32_t adv_start_time;
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/* Next LPN related action timer */
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struct k_work_delayable timer;
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/* Subscribed groups */
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uint16_t groups[LPN_GROUPS];
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struct bt_mesh_subnet *sub;
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struct bt_mesh_net_cred cred[2];
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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_INIT, /* We have been initialized */
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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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BT_MESH_COMP_DIRTY, /* Composition data is dirty */
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BT_MESH_DEVKEY_CAND, /* Has device key candidate */
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BT_MESH_METADATA_DIRTY, /* Models metadata is dirty */
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/* Feature flags */
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BT_MESH_RELAY,
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BT_MESH_BEACON,
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BT_MESH_GATT_PROXY,
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BT_MESH_FRIEND,
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BT_MESH_PRIV_BEACON,
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BT_MESH_PRIV_GATT_PROXY,
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BT_MESH_OD_PRIV_PROXY,
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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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uint32_t iv_index; /* Current IV Index */
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uint32_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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uint8_t ivu_duration;
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uint8_t net_xmit;
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uint8_t relay_xmit;
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uint8_t default_ttl;
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#if defined(CONFIG_BT_MESH_PRIV_BEACONS)
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uint8_t priv_beacon_int;
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#endif
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/* Timer to track duration in current IV Update state */
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struct k_work_delayable ivu_timer;
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struct bt_mesh_key dev_key;
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#if defined(CONFIG_BT_MESH_RPR_SRV)
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struct bt_mesh_key dev_key_cand;
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#endif
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#if defined(CONFIG_BT_MESH_OD_PRIV_PROXY_SRV)
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uint8_t on_demand_state;
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#endif
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struct bt_mesh_sar_tx sar_tx; /* Transport SAR Transmitter configuration */
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struct bt_mesh_sar_rx sar_rx; /* Transport SAR Receiver configuration */
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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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uint32_t seq; /* Sequence Number */
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uint8_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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uint16_t src;
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uint8_t xmit;
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uint8_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_create(uint16_t idx, uint8_t flags, const struct bt_mesh_key *key,
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uint32_t iv_index);
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bool bt_mesh_net_iv_update(uint32_t iv_index, bool iv_update);
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int bt_mesh_net_encode(struct bt_mesh_net_tx *tx, struct net_buf_simple *buf,
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enum bt_mesh_nonce_type type);
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int bt_mesh_net_send(struct bt_mesh_net_tx *tx, struct bt_mesh_adv *adv,
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const struct bt_mesh_send_cb *cb, void *cb_data);
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int bt_mesh_net_decode(struct net_buf_simple *in, enum bt_mesh_net_if net_if,
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struct bt_mesh_net_rx *rx, struct net_buf_simple *out);
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void bt_mesh_net_recv(struct net_buf_simple *data, int8_t rssi,
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enum bt_mesh_net_if net_if);
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void bt_mesh_net_loopback_clear(uint16_t net_idx);
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uint32_t bt_mesh_next_seq(void);
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void bt_mesh_net_seq_store(bool force);
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void bt_mesh_net_init(void);
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void bt_mesh_net_header_parse(struct net_buf_simple *buf,
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struct bt_mesh_net_rx *rx);
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void bt_mesh_net_pending_net_store(void);
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void bt_mesh_net_pending_iv_store(void);
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void bt_mesh_net_pending_seq_store(void);
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void bt_mesh_net_pending_dev_key_cand_store(void);
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void bt_mesh_net_dev_key_cand_store(void);
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void bt_mesh_net_store(void);
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void bt_mesh_net_clear(void);
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void bt_mesh_net_settings_commit(void);
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static inline void send_cb_finalize(const struct bt_mesh_send_cb *cb,
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void *cb_data)
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{
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if (!cb) {
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return;
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}
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if (cb->start) {
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cb->start(0, 0, cb_data);
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}
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if (cb->end) {
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cb->end(0, cb_data);
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}
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}
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