rfcomm.h

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/*
 * Copyright (c) 2015-2016 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef ZEPHYR_INCLUDE_BLUETOOTH_RFCOMM_H_
#define ZEPHYR_INCLUDE_BLUETOOTH_RFCOMM_H_
 
#include <zephyr/bluetooth/buf.h>
#include <zephyr/bluetooth/conn.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* RFCOMM channels (1-30): pre-allocated for profiles to avoid conflicts */
enum {
        BT_RFCOMM_CHAN_HFP_HF = 1,
        BT_RFCOMM_CHAN_HFP_AG,
        BT_RFCOMM_CHAN_HSP_AG,
        BT_RFCOMM_CHAN_HSP_HS,
        BT_RFCOMM_CHAN_SPP,
};
 
struct bt_rfcomm_dlc;
 
struct bt_rfcomm_dlc_ops {
        void (*connected)(struct bt_rfcomm_dlc *dlc);
 
        void (*disconnected)(struct bt_rfcomm_dlc *dlc);
 
        void (*recv)(struct bt_rfcomm_dlc *dlc, struct net_buf *buf);
};
 
typedef enum bt_rfcomm_role {
        BT_RFCOMM_ROLE_ACCEPTOR,
        BT_RFCOMM_ROLE_INITIATOR
} __packed bt_rfcomm_role_t;
 
struct bt_rfcomm_dlc {
        /* Response Timeout eXpired (RTX) timer */
        struct k_work_delayable    rtx_work;
 
        /* Queue for outgoing data */
        struct k_fifo              tx_queue;
 
        /* TX credits, Reuse as a binary sem for MSC FC if CFC is not enabled */
        struct k_sem               tx_credits;
 
        struct bt_rfcomm_session  *session;
        struct bt_rfcomm_dlc_ops  *ops;
        struct bt_rfcomm_dlc      *_next;
 
        bt_security_t              required_sec_level;
        bt_rfcomm_role_t           role;
 
        uint16_t                      mtu;
        uint8_t                       dlci;
        uint8_t                       state;
        uint8_t                       rx_credit;
 
        /* Stack & kernel data for TX thread */
        struct k_thread            tx_thread;
        K_KERNEL_STACK_MEMBER(stack, 256);
};
 
struct bt_rfcomm_server {
        uint8_t channel;
 
        int (*accept)(struct bt_conn *conn, struct bt_rfcomm_dlc **dlc);
 
        struct bt_rfcomm_server *_next;
};
 
int bt_rfcomm_server_register(struct bt_rfcomm_server *server);
 
int bt_rfcomm_dlc_connect(struct bt_conn *conn, struct bt_rfcomm_dlc *dlc,
                          uint8_t channel);
 
int bt_rfcomm_dlc_send(struct bt_rfcomm_dlc *dlc, struct net_buf *buf);
 
int bt_rfcomm_dlc_disconnect(struct bt_rfcomm_dlc *dlc);
 
struct net_buf *bt_rfcomm_create_pdu(struct net_buf_pool *pool);
 
#ifdef __cplusplus
}
#endif
 
#endif /* ZEPHYR_INCLUDE_BLUETOOTH_RFCOMM_H_ */