bluetooth.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2000-2001  Qualcomm Incorporated
 *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
 *  Copyright (C) 2002-2010  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 */

#ifndef __BLUETOOTH_H
#define __BLUETOOTH_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <endian.h>
#include <byteswap.h>
#include <netinet/in.h>

#ifndef AF_BLUETOOTH
#define AF_BLUETOOTH    31
#define PF_BLUETOOTH    AF_BLUETOOTH
#endif

#define BTPROTO_L2CAP   0
#define BTPROTO_HCI 1
#define BTPROTO_SCO 2
#define BTPROTO_RFCOMM  3
#define BTPROTO_BNEP    4
#define BTPROTO_CMTP    5
#define BTPROTO_HIDP    6
#define BTPROTO_AVDTP   7

#define SOL_HCI     0
#define SOL_L2CAP   6
#define SOL_SCO     17
#define SOL_RFCOMM  18

#ifndef SOL_BLUETOOTH
#define SOL_BLUETOOTH   274
#endif

#define BT_SECURITY 4
struct bt_security {
    uint8_t level;
    uint8_t key_size;
};
#define BT_SECURITY_SDP     0
#define BT_SECURITY_LOW     1
#define BT_SECURITY_MEDIUM  2
#define BT_SECURITY_HIGH    3
#define BT_SECURITY_FIPS    4

#define BT_DEFER_SETUP  7

#define BT_FLUSHABLE    8

#define BT_FLUSHABLE_OFF    0
#define BT_FLUSHABLE_ON     1

#define BT_POWER        9
struct bt_power {
    uint8_t force_active;
};
#define BT_POWER_FORCE_ACTIVE_OFF 0
#define BT_POWER_FORCE_ACTIVE_ON  1

#define BT_CHANNEL_POLICY   10

/* BR/EDR only (default policy)
 *   AMP controllers cannot be used.
 *   Channel move requests from the remote device are denied.
 *   If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
 */
#define BT_CHANNEL_POLICY_BREDR_ONLY        0

/* BR/EDR Preferred
 *   Allow use of AMP controllers.
 *   If the L2CAP channel is currently on AMP, move it to BR/EDR.
 *   Channel move requests from the remote device are allowed.
 */
#define BT_CHANNEL_POLICY_BREDR_PREFERRED   1

/* AMP Preferred
 *   Allow use of AMP controllers
 *   If the L2CAP channel is currently on BR/EDR and AMP controller
 *     resources are available, initiate a channel move to AMP.
 *   Channel move requests from the remote device are allowed.
 *   If the L2CAP socket has not been connected yet, try to create
 *     and configure the channel directly on an AMP controller rather
 *     than BR/EDR.
 */
#define BT_CHANNEL_POLICY_AMP_PREFERRED     2

#define BT_VOICE        11
struct bt_voice {
    uint16_t setting;
};

#define BT_SNDMTU       12
#define BT_RCVMTU       13

#define BT_VOICE_TRANSPARENT            0x0003
#define BT_VOICE_CVSD_16BIT         0x0060

#define BT_PHY          14

#define BT_PHY_BR_1M_1SLOT  0x00000001
#define BT_PHY_BR_1M_3SLOT  0x00000002
#define BT_PHY_BR_1M_5SLOT  0x00000004
#define BT_PHY_EDR_2M_1SLOT 0x00000008
#define BT_PHY_EDR_2M_3SLOT 0x00000010
#define BT_PHY_EDR_2M_5SLOT 0x00000020
#define BT_PHY_EDR_3M_1SLOT 0x00000040
#define BT_PHY_EDR_3M_3SLOT 0x00000080
#define BT_PHY_EDR_3M_5SLOT 0x00000100
#define BT_PHY_LE_1M_TX     0x00000200
#define BT_PHY_LE_1M_RX     0x00000400
#define BT_PHY_LE_2M_TX     0x00000800
#define BT_PHY_LE_2M_RX     0x00001000
#define BT_PHY_LE_CODED_TX  0x00002000
#define BT_PHY_LE_CODED_RX  0x00004000

#define BT_MODE         15

#define BT_MODE_BASIC       0x00
#define BT_MODE_ERTM        0x01
#define BT_MODE_STREAMING   0x02
#define BT_MODE_LE_FLOWCTL  0x03
#define BT_MODE_EXT_FLOWCTL 0x04

#define BT_PKT_STATUS       16

#define BT_SCM_PKT_STATUS   0x03

#define BT_CODEC 19
struct bt_codec {
    uint8_t id;
    uint16_t cid;
    uint16_t vid;
    uint8_t data_path_id;
    uint8_t num_caps;
    struct codec_caps {
        uint8_t len;
        uint8_t data[];
    } caps[];
} __attribute__((packed));

struct bt_codecs {
    uint8_t num_codecs;
    struct bt_codec codecs[];
} __attribute__((packed));

/* Connection and socket states */
enum {
    BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
    BT_OPEN,
    BT_BOUND,
    BT_LISTEN,
    BT_CONNECT,
    BT_CONNECT2,
    BT_CONFIG,
    BT_DISCONN,
    BT_CLOSED
};

/* Byte order conversions */
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define htobs(d)  (d)
#define htobl(d)  (d)
#define htobll(d) (d)
#define btohs(d)  (d)
#define btohl(d)  (d)
#define btohll(d) (d)
#elif __BYTE_ORDER == __BIG_ENDIAN
#define htobs(d)  bswap_16(d)
#define htobl(d)  bswap_32(d)
#define htobll(d) bswap_64(d)
#define btohs(d)  bswap_16(d)
#define btohl(d)  bswap_32(d)
#define btohll(d) bswap_64(d)
#else
#error "Unknown byte order"
#endif

/* Bluetooth unaligned access */
#define bt_get_unaligned(ptr)           \
__extension__ ({                \
    struct __attribute__((packed)) {    \
        __typeof__(*(ptr)) __v;     \
    } *__p = (__typeof__(__p)) (ptr);   \
    __p->__v;               \
})

#define bt_put_unaligned(val, ptr)      \
do {                        \
    struct __attribute__((packed)) {    \
        __typeof__(*(ptr)) __v;     \
    } *__p = (__typeof__(__p)) (ptr);   \
    __p->__v = (val);           \
} while(0)

#if __BYTE_ORDER == __LITTLE_ENDIAN
static inline uint64_t bt_get_le64(const void *ptr)
{
    return bt_get_unaligned((const uint64_t *) ptr);
}

static inline uint64_t bt_get_be64(const void *ptr)
{
    return bswap_64(bt_get_unaligned((const uint64_t *) ptr));
}

static inline uint32_t bt_get_le32(const void *ptr)
{
    return bt_get_unaligned((const uint32_t *) ptr);
}

static inline uint32_t bt_get_be32(const void *ptr)
{
    return bswap_32(bt_get_unaligned((const uint32_t *) ptr));
}

static inline uint16_t bt_get_le16(const void *ptr)
{
    return bt_get_unaligned((const uint16_t *) ptr);
}

static inline uint16_t bt_get_be16(const void *ptr)
{
    return bswap_16(bt_get_unaligned((const uint16_t *) ptr));
}

static inline void bt_put_le64(uint64_t val, const void *ptr)
{
    bt_put_unaligned(val, (uint64_t *) ptr);
}

static inline void bt_put_be64(uint64_t val, const void *ptr)
{
    bt_put_unaligned(bswap_64(val), (uint64_t *) ptr);
}

static inline void bt_put_le32(uint32_t val, const void *ptr)
{
    bt_put_unaligned(val, (uint32_t *) ptr);
}

static inline void bt_put_be32(uint32_t val, const void *ptr)
{
    bt_put_unaligned(bswap_32(val), (uint32_t *) ptr);
}

static inline void bt_put_le16(uint16_t val, const void *ptr)
{
    bt_put_unaligned(val, (uint16_t *) ptr);
}

static inline void bt_put_be16(uint16_t val, const void *ptr)
{
    bt_put_unaligned(bswap_16(val), (uint16_t *) ptr);
}

#elif __BYTE_ORDER == __BIG_ENDIAN
static inline uint64_t bt_get_le64(const void *ptr)
{
    return bswap_64(bt_get_unaligned((const uint64_t *) ptr));
}

static inline uint64_t bt_get_be64(const void *ptr)
{
    return bt_get_unaligned((const uint64_t *) ptr);
}

static inline uint32_t bt_get_le32(const void *ptr)
{
    return bswap_32(bt_get_unaligned((const uint32_t *) ptr));
}

static inline uint32_t bt_get_be32(const void *ptr)
{
    return bt_get_unaligned((const uint32_t *) ptr);
}

static inline uint16_t bt_get_le16(const void *ptr)
{
    return bswap_16(bt_get_unaligned((const uint16_t *) ptr));
}

static inline uint16_t bt_get_be16(const void *ptr)
{
    return bt_get_unaligned((const uint16_t *) ptr);
}

static inline void bt_put_le64(uint64_t val, const void *ptr)
{
    bt_put_unaligned(bswap_64(val), (uint64_t *) ptr);
}

static inline void bt_put_be64(uint64_t val, const void *ptr)
{
    bt_put_unaligned(val, (uint64_t *) ptr);
}

static inline void bt_put_le32(uint32_t val, const void *ptr)
{
    bt_put_unaligned(bswap_32(val), (uint32_t *) ptr);
}

static inline void bt_put_be32(uint32_t val, const void *ptr)
{
    bt_put_unaligned(val, (uint32_t *) ptr);
}

static inline void bt_put_le16(uint16_t val, const void *ptr)
{
    bt_put_unaligned(bswap_16(val), (uint16_t *) ptr);
}

static inline void bt_put_be16(uint16_t val, const void *ptr)
{
    bt_put_unaligned(val, (uint16_t *) ptr);
}
#else
#error "Unknown byte order"
#endif

/* BD Address */
typedef struct {
    uint8_t b[6];
} __attribute__((packed)) bdaddr_t;

/* BD Address type */
#define BDADDR_BREDR           0x00
#define BDADDR_LE_PUBLIC       0x01
#define BDADDR_LE_RANDOM       0x02

#define BDADDR_ANY   (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
#define BDADDR_ALL   (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
#define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff}})

/* Copy, swap, convert BD Address */
static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
{
    return memcmp(ba1, ba2, sizeof(bdaddr_t));
}
static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
{
    memcpy(dst, src, sizeof(bdaddr_t));
}

void baswap(bdaddr_t *dst, const bdaddr_t *src);
bdaddr_t *strtoba(const char *str);
char *batostr(const bdaddr_t *ba);
int ba2str(const bdaddr_t *ba, char *str);
int ba2strlc(const bdaddr_t *ba, char *str);
int str2ba(const char *str, bdaddr_t *ba);
int ba2oui(const bdaddr_t *ba, char *oui);
int bachk(const char *str);

int baprintf(const char *format, ...);
int bafprintf(FILE *stream, const char *format, ...);
int basprintf(char *str, const char *format, ...);
int basnprintf(char *str, size_t size, const char *format, ...);

void *bt_malloc(size_t size);
void *bt_malloc0(size_t size);
void bt_free(void *ptr);

int bt_error(uint16_t code);
const char *bt_compidtostr(int id);

typedef struct {
    uint8_t data[16];
} uint128_t;

static inline void bswap_128(const void *src, void *dst)
{
    const uint8_t *s = (const uint8_t *) src;
    uint8_t *d = (uint8_t *) dst;
    int i;

    for (i = 0; i < 16; i++)
        d[15 - i] = s[i];
}

#if __BYTE_ORDER == __BIG_ENDIAN

#define ntoh64(x) (x)

static inline void ntoh128(const uint128_t *src, uint128_t *dst)
{
    memcpy(dst, src, sizeof(uint128_t));
}

static inline void btoh128(const uint128_t *src, uint128_t *dst)
{
    bswap_128(src, dst);
}

#else

static inline uint64_t ntoh64(uint64_t n)
{
    uint64_t h;
    uint64_t tmp = ntohl(n & 0x00000000ffffffff);

    h = ntohl(n >> 32);
    h |= tmp << 32;

    return h;
}

static inline void ntoh128(const uint128_t *src, uint128_t *dst)
{
    bswap_128(src, dst);
}

static inline void btoh128(const uint128_t *src, uint128_t *dst)
{
    memcpy(dst, src, sizeof(uint128_t));
}

#endif

#define hton64(x)     ntoh64(x)
#define hton128(x, y) ntoh128(x, y)
#define htob128(x, y) btoh128(x, y)

#ifdef __cplusplus
}
#endif

#endif /* __BLUETOOTH_H */