196 lines
5.3 KiB
C
196 lines
5.3 KiB
C
/** @file
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* @brief Internal APIs for Bluetooth connection handling.
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*/
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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typedef enum __packed {
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BT_CONN_DISCONNECTED,
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BT_CONN_CONNECT_SCAN,
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BT_CONN_CONNECT,
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BT_CONN_CONNECTED,
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BT_CONN_DISCONNECT,
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} bt_conn_state_t;
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/* bt_conn flags: the flags defined here represent connection parameters */
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enum {
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BT_CONN_AUTO_CONNECT,
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BT_CONN_BR_LEGACY_SECURE, /* 16 digits legacy PIN tracker */
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BT_CONN_USER, /* user I/O when pairing */
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BT_CONN_BR_PAIRING, /* BR connection in pairing context */
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BT_CONN_BR_NOBOND, /* SSP no bond pairing tracker */
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BT_CONN_BR_PAIRING_INITIATOR, /* local host starts authentication */
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/* Total number of flags - must be at the end of the enum */
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BT_CONN_NUM_FLAGS,
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};
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struct bt_conn_le {
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bt_addr_le_t dst;
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bt_addr_le_t init_addr;
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bt_addr_le_t resp_addr;
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uint16_t interval;
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uint16_t interval_min;
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uint16_t interval_max;
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uint16_t latency;
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uint16_t timeout;
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uint8_t features[1][8];
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struct bt_keys *keys;
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/* Delayed work for connection update handling */
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struct nano_delayed_work update_work;
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};
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#if defined(CONFIG_BLUETOOTH_BREDR)
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/* For now reserve space for 2 pages of LMP remote features */
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#define LMP_MAX_PAGES 2
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struct bt_conn_br {
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bt_addr_t dst;
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uint8_t remote_io_capa;
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uint8_t remote_auth;
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uint8_t pairing_method;
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/* remote LMP features pages per 8 bytes each */
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uint8_t features[LMP_MAX_PAGES][8];
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struct bt_keys_link_key *link_key;
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};
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#endif
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struct bt_conn {
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uint16_t handle;
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uint8_t type;
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uint8_t role;
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ATOMIC_DEFINE(flags, BT_CONN_NUM_FLAGS);
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#if defined(CONFIG_BLUETOOTH_SMP) || defined(CONFIG_BLUETOOTH_BREDR)
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bt_security_t sec_level;
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bt_security_t required_sec_level;
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uint8_t encrypt;
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#endif /* CONFIG_BLUETOOTH_SMP || CONFIG_BLUETOOTH_BREDR */
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uint8_t pending_pkts;
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uint16_t rx_len;
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struct net_buf *rx;
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/* Queue for outgoing ACL data */
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struct nano_fifo tx_queue;
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/* L2CAP channels */
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void *channels;
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atomic_t ref;
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/* Connection error or reason for disconnect */
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uint8_t err;
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bt_conn_state_t state;
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/* Handle allowing to cancel timeout fiber */
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nano_thread_id_t timeout;
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union {
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struct bt_conn_le le;
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#if defined(CONFIG_BLUETOOTH_BREDR)
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struct bt_conn_br br;
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#endif
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};
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/* Stack for TX fiber and timeout fiber.
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* Since these fibers don't overlap, one stack can be used by
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* both of them.
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*/
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BT_STACK(stack, 256);
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};
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/* Process incoming data for a connection */
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void bt_conn_recv(struct bt_conn *conn, struct net_buf *buf, uint8_t flags);
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/* Send data over a connection */
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int bt_conn_send(struct bt_conn *conn, struct net_buf *buf);
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/* Add a new LE connection */
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struct bt_conn *bt_conn_add_le(const bt_addr_le_t *peer);
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#if defined(CONFIG_BLUETOOTH_BREDR)
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/* Add a new BR/EDR connection */
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struct bt_conn *bt_conn_add_br(const bt_addr_t *peer);
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/* Look up an existing connection by BT address */
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struct bt_conn *bt_conn_lookup_addr_br(const bt_addr_t *peer);
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void bt_conn_pin_code_req(struct bt_conn *conn);
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uint8_t bt_conn_get_io_capa(void);
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uint8_t bt_conn_ssp_get_auth(const struct bt_conn *conn);
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void bt_conn_ssp_auth(struct bt_conn *conn, uint32_t passkey);
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#endif
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/* Look up an existing connection */
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struct bt_conn *bt_conn_lookup_handle(uint16_t handle);
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/* Look up a connection state. For BT_ADDR_LE_ANY, returns the first connection
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* with the specific state
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*/
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struct bt_conn *bt_conn_lookup_state_le(const bt_addr_le_t *peer,
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const bt_conn_state_t state);
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/* Set connection object in certain state and perform action related to state */
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void bt_conn_set_state(struct bt_conn *conn, bt_conn_state_t state);
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int bt_conn_le_conn_update(struct bt_conn *conn,
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const struct bt_le_conn_param *param);
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void notify_le_param_updated(struct bt_conn *conn);
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#if defined(CONFIG_BLUETOOTH_SMP)
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/* rand and ediv should be in BT order */
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int bt_conn_le_start_encryption(struct bt_conn *conn, uint64_t rand,
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uint16_t ediv, const uint8_t *ltk, size_t len);
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/* Notify higher layers that RPA was resolved */
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void bt_conn_identity_resolved(struct bt_conn *conn);
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#endif /* CONFIG_BLUETOOTH_SMP */
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#if defined(CONFIG_BLUETOOTH_SMP) || defined(CONFIG_BLUETOOTH_BREDR)
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/* Notify higher layers that connection security changed */
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void bt_conn_security_changed(struct bt_conn *conn);
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#endif /* CONFIG_BLUETOOTH_SMP || CONFIG_BLUETOOTH_BREDR */
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/* Prepare a PDU to be sent over a connection */
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struct net_buf *bt_conn_create_pdu(struct nano_fifo *fifo, size_t reserve);
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/* Initialize connection management */
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int bt_conn_init(void);
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/* Selects based on connecton type right semaphore for ACL packets */
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static inline struct nano_sem *bt_conn_get_pkts(struct bt_conn *conn)
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{
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#if defined(CONFIG_BLUETOOTH_BREDR)
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if (conn->type == BT_CONN_TYPE_BR || !bt_dev.le.mtu) {
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return &bt_dev.br.pkts;
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}
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#endif /* CONFIG_BLUETOOTH_BREDR */
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return &bt_dev.le.pkts;
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}
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