/* l2cap_br.c - L2CAP BREDR internal interface
 *
 * This is the only interface between l2cap.c and l2cap_br.c.
 *
 * Copyright (c) 2024 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/* Need a name different than bt_l2cap_fixed_chan for a different section */
struct bt_l2cap_br_fixed_chan {
	uint16_t		cid;
	int (*accept)(struct bt_conn *conn, struct bt_l2cap_chan **chan);
};

#define BT_L2CAP_BR_CHANNEL_DEFINE(_name, _cid, _accept)		\
	const STRUCT_SECTION_ITERABLE(bt_l2cap_br_fixed_chan, _name) = { \
				.cid = _cid,			\
				.accept = _accept,		\
			}

/* Initialize BR/EDR L2CAP signal layer */
void bt_l2cap_br_init(void);

/* Notify BR/EDR L2CAP channels about established new ACL connection */
void bt_l2cap_br_connected(struct bt_conn *conn);

/* Notify BR/EDR L2CAP channels about ACL disconnection*/
void bt_l2cap_br_disconnected(struct bt_conn *conn);

/* Lookup BR/EDR L2CAP channel by Receiver CID */
struct bt_l2cap_chan *bt_l2cap_br_lookup_rx_cid(struct bt_conn *conn,
						uint16_t cid);

/* Disconnects dynamic channel */
int bt_l2cap_br_chan_disconnect(struct bt_l2cap_chan *chan);

/* Make connection to peer psm server */
int bt_l2cap_br_chan_connect(struct bt_conn *conn, struct bt_l2cap_chan *chan,
			     uint16_t psm);

/* Send packet data to connected peer */
int bt_l2cap_br_chan_send(struct bt_l2cap_chan *chan, struct net_buf *buf);
int bt_l2cap_br_chan_send_cb(struct bt_l2cap_chan *chan, struct net_buf *buf, bt_conn_tx_cb_t cb,
			     void *user_data);

/* Send a single PDU over a BR channel.
 * Used by e.g. SMP.
 */
int bt_l2cap_br_send_cb(struct bt_conn *conn, uint16_t cid, struct net_buf *buf,
			bt_conn_tx_cb_t cb, void *user_data);

/*
 * Handle security level changed on link passing HCI status of performed
 * security procedure.
 */
void l2cap_br_encrypt_change(struct bt_conn *conn, uint8_t hci_status);

/* Handle received data */
void bt_l2cap_br_recv(struct bt_conn *conn, struct net_buf *buf);

/* Pull HCI fragments from buffers intended for `conn` */
struct net_buf *l2cap_br_data_pull(struct bt_conn *conn,
				   size_t amount,
				   size_t *length);

/* Find L2CAP BR channel by using specific cid on specific connection */
struct bt_l2cap_chan *bt_l2cap_br_lookup_tx_cid(struct bt_conn *conn,
						uint16_t cid);

/* Get remote supported fixed channels */
uint8_t bt_l2cap_br_get_remote_fixed_chan(struct bt_conn *conn);