113 lines
3.6 KiB
C
113 lines
3.6 KiB
C
/* l2cap.h - L2CAP handling */
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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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#define BT_L2CAP_CID_ATT 0x0004
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#define BT_L2CAP_CID_LE_SIG 0x0005
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#define BT_L2CAP_CID_SMP 0x0006
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struct bt_l2cap_hdr {
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uint16_t len;
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uint16_t cid;
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} __packed;
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struct bt_l2cap_sig_hdr {
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uint8_t code;
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uint8_t ident;
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uint16_t len;
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} __packed;
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#define BT_L2CAP_REJ_NOT_UNDERSTOOD 0x0000
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#define BT_L2CAP_REJ_MTU_EXCEEDED 0x0001
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#define BT_L2CAP_REJ_INVALID_CID 0x0002
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#define BT_L2CAP_CMD_REJECT 0x01
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struct bt_l2cap_cmd_reject {
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uint16_t reason;
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uint8_t data[0];
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} __packed;
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#define BT_L2CAP_CONN_PARAM_REQ 0x12
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struct bt_l2cap_conn_param_req {
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uint16_t min_interval;
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uint16_t max_interval;
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uint16_t latency;
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uint16_t timeout;
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} __packed;
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#define BT_L2CAP_CONN_PARAM_ACCEPTED 0x0000
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#define BT_L2CAP_CONN_PARAM_REJECTED 0x0001
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#define BT_L2CAP_CONN_PARAM_RSP 0x13
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struct bt_l2cap_conn_param_rsp {
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uint16_t result;
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} __packed;
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struct bt_l2cap_chan {
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uint16_t cid;
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void (*connected)(struct bt_conn *conn);
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void (*disconnected)(struct bt_conn *conn);
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void (*encrypt_change)(struct bt_conn *conn);
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void (*recv)(struct bt_conn *conn,
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struct bt_buf *buf);
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struct bt_l2cap_chan *_next;
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};
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/* Register a fixed L2CAP channel for L2CAP */
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void bt_l2cap_chan_register(struct bt_l2cap_chan *chan);
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/* Notify L2CAP channels of a new connection */
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void bt_l2cap_connected(struct bt_conn *conn);
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/* Notify L2CAP channels of a disconnect event */
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void bt_l2cap_disconnected(struct bt_conn *conn);
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/* Notify L2CAP channels of a change in encryption state */
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void bt_l2cap_encrypt_change(struct bt_conn *conn);
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/* Prepare an L2CAP PDU to be sent over a connection */
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struct bt_buf *bt_l2cap_create_pdu(struct bt_conn *conn);
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/* Send L2CAP PDU over a connection */
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void bt_l2cap_send(struct bt_conn *conn, uint16_t cid, struct bt_buf *buf);
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/* Receive a new L2CAP PDU from a connection */
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void bt_l2cap_recv(struct bt_conn *conn, struct bt_buf *buf);
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/* Perform connection parameter update request */
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int bt_l2cap_update_conn_param(struct bt_conn *conn);
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/* Initialize L2CAP and supported channels */
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int bt_l2cap_init(void);
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