136 lines
4.0 KiB
C
136 lines
4.0 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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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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typedef enum {
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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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/* L2CAP signaling channel specific context */
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struct bt_conn_l2cap {
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uint8_t ident;
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};
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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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};
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struct bt_conn {
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uint16_t handle;
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uint8_t role;
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atomic_t flags[1];
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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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uint8_t pending_pkts;
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uint8_t encrypt;
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bt_security_t sec_level;
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bt_security_t required_sec_level;
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uint16_t rx_len;
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struct bt_buf *rx;
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/* Queue for outgoing ACL data */
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struct nano_fifo tx_queue;
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struct bt_keys *keys;
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/* Fixed channel contexts */
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struct bt_conn_l2cap l2cap;
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void *att;
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void *smp;
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uint8_t le_conn_interval;
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atomic_t ref;
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bt_conn_state_t state;
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/* Handle allowing to cancel timeout fiber */
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void *timeout;
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uint8_t le_features[8];
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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 bt_buf *buf, uint8_t flags);
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/* Send data over a connection */
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void bt_conn_send(struct bt_conn *conn, struct bt_buf *buf);
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/* Add a new connection */
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struct bt_conn *bt_conn_add(const bt_addr_le_t *peer);
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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(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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/* 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);
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int bt_conn_le_conn_update(struct bt_conn *conn, uint16_t min, uint16_t max,
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uint16_t latency, uint16_t timeout);
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/* Notify higher layers of a new connection */
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void bt_conn_connected(struct bt_conn *conn);
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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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/* Notify higher layers that connection security changed */
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void bt_conn_security_changed(struct bt_conn *conn);
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