

#ifndef __BLUETOOTH_H
#define __BLUETOOTH_H

#include <linux/poll.h>
#include <net/sock.h>
#include <linux/seq_file.h>

#define BT_SUBSYS_VERSION	2
#define BT_SUBSYS_REVISION	22

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


#define BLUETOOTH_VER_1_1	1
#define BLUETOOTH_VER_1_2	2
#define BLUETOOTH_VER_2_0	3
#define BLUETOOTH_VER_2_1	4
#define BLUETOOTH_VER_4_0	6


#define BT_SKB_RESERVE	8

#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 BTPROTO_ISO	8
#define BTPROTO_LAST	BTPROTO_ISO

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

#define BT_SECURITY	4
struct bt_security {
	__u8 level;
	__u8 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 {
	__u8 force_active;
};
#define BT_POWER_FORCE_ACTIVE_OFF 0
#define BT_POWER_FORCE_ACTIVE_ON  1

#define BT_CHANNEL_POLICY	10


#define BT_CHANNEL_POLICY_BREDR_ONLY		0


#define BT_CHANNEL_POLICY_BREDR_PREFERRED	1


#define BT_CHANNEL_POLICY_AMP_PREFERRED		2

#define BT_VOICE		11
struct bt_voice {
	__u16 setting;
};

#define BT_VOICE_TRANSPARENT			0x0003
#define BT_VOICE_CVSD_16BIT			0x0060
#define BT_VOICE_TRANSPARENT_16BIT		0x0063

#define BT_SNDMTU		12
#define BT_RCVMTU		13
#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_ISO_QOS		17

#define BT_ISO_QOS_CIG_UNSET	0xff
#define BT_ISO_QOS_CIS_UNSET	0xff

#define BT_ISO_QOS_BIG_UNSET	0xff
#define BT_ISO_QOS_BIS_UNSET	0xff

struct bt_iso_io_qos {
	__u32 interval;
	__u16 latency;
	__u16 sdu;
	__u8  phy;
	__u8  rtn;
};

struct bt_iso_qos {
	union {
		__u8  cig;
		__u8  big;
	};
	union {
		__u8  cis;
		__u8  bis;
	};
	union {
		__u8  sca;
		__u8  sync_interval;
	};
	__u8  packing;
	__u8  framing;
	struct bt_iso_io_qos in;
	struct bt_iso_io_qos out;
};

#define BT_ISO_PHY_1M		0x01
#define BT_ISO_PHY_2M		0x02
#define BT_ISO_PHY_CODED	0x04
#define BT_ISO_PHY_ANY		(BT_ISO_PHY_1M | BT_ISO_PHY_2M | \
				 BT_ISO_PHY_CODED)

#define BT_CODEC	19

struct	bt_codec_caps {
	__u8	len;
	__u8	data[];
} __packed;

struct bt_codec {
	__u8	id;
	__u16	cid;
	__u16	vid;
	__u8	data_path;
	__u8	num_caps;
} __packed;

struct bt_codecs {
	__u8		num_codecs;
	struct bt_codec	codecs[];
} __packed;

#define BT_CODEC_CVSD		0x02
#define BT_CODEC_TRANSPARENT	0x03
#define BT_CODEC_MSBC		0x05

#define BT_ISO_BASE		20

__printf(1, 2)
void bt_info(const char *fmt, ...);
__printf(1, 2)
void bt_warn(const char *fmt, ...);
__printf(1, 2)
void bt_err(const char *fmt, ...);
#if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
void bt_dbg_set(bool enable);
bool bt_dbg_get(void);
__printf(1, 2)
void bt_dbg(const char *fmt, ...);
#endif
__printf(1, 2)
void bt_warn_ratelimited(const char *fmt, ...);
__printf(1, 2)
void bt_err_ratelimited(const char *fmt, ...);

#define BT_INFO(fmt, ...)	bt_info(fmt "\n", ##__VA_ARGS__)
#define BT_WARN(fmt, ...)	bt_warn(fmt "\n", ##__VA_ARGS__)
#define BT_ERR(fmt, ...)	bt_err(fmt "\n", ##__VA_ARGS__)

#if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
#define BT_DBG(fmt, ...)	bt_dbg(fmt "\n", ##__VA_ARGS__)
#else
#define BT_DBG(fmt, ...)	pr_debug(fmt "\n", ##__VA_ARGS__)
#endif

#define bt_dev_name(hdev) ((hdev) ? (hdev)->name : "null")

#define bt_dev_info(hdev, fmt, ...)				\
	BT_INFO("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
#define bt_dev_warn(hdev, fmt, ...)				\
	BT_WARN("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
#define bt_dev_err(hdev, fmt, ...)				\
	BT_ERR("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
#define bt_dev_dbg(hdev, fmt, ...)				\
	BT_DBG("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)

#define bt_dev_warn_ratelimited(hdev, fmt, ...)			\
	bt_warn_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
#define bt_dev_err_ratelimited(hdev, fmt, ...)			\
	bt_err_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)


enum {
	BT_CONNECTED = 1, 
	BT_OPEN,
	BT_BOUND,
	BT_LISTEN,
	BT_CONNECT,
	BT_CONNECT2,
	BT_CONFIG,
	BT_DISCONN,
	BT_CLOSED
};


static inline const char *state_to_string(int state)
{
	switch (state) {
	case BT_CONNECTED:
		return "BT_CONNECTED";
	case BT_OPEN:
		return "BT_OPEN";
	case BT_BOUND:
		return "BT_BOUND";
	case BT_LISTEN:
		return "BT_LISTEN";
	case BT_CONNECT:
		return "BT_CONNECT";
	case BT_CONNECT2:
		return "BT_CONNECT2";
	case BT_CONFIG:
		return "BT_CONFIG";
	case BT_DISCONN:
		return "BT_DISCONN";
	case BT_CLOSED:
		return "BT_CLOSED";
	}

	return "invalid state";
}


typedef struct {
	__u8 b[6];
} __packed bdaddr_t;


#define BDADDR_BREDR		0x00
#define BDADDR_LE_PUBLIC	0x01
#define BDADDR_LE_RANDOM	0x02

static inline bool bdaddr_type_is_valid(u8 type)
{
	switch (type) {
	case BDADDR_BREDR:
	case BDADDR_LE_PUBLIC:
	case BDADDR_LE_RANDOM:
		return true;
	}

	return false;
}

static inline bool bdaddr_type_is_le(u8 type)
{
	switch (type) {
	case BDADDR_LE_PUBLIC:
	case BDADDR_LE_RANDOM:
		return true;
	}

	return false;
}

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


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);



#define bt_sk(__sk) ((struct bt_sock *) __sk)

struct bt_sock {
	struct sock sk;
	struct list_head accept_q;
	spinlock_t accept_q_lock; 
	struct sock *parent;
	unsigned long flags;
	void (*skb_msg_name)(struct sk_buff *, void *, int *);
	void (*skb_put_cmsg)(struct sk_buff *, struct msghdr *, struct sock *);
};

enum {
	BT_SK_DEFER_SETUP,
	BT_SK_SUSPEND,
};

struct bt_sock_list {
	struct hlist_head head;
	rwlock_t          lock;
#ifdef CONFIG_PROC_FS
        int (* custom_seq_show)(struct seq_file *, void *);
#endif
};

int  bt_sock_register(int proto, const struct net_proto_family *ops);
void bt_sock_unregister(int proto);
void bt_sock_link(struct bt_sock_list *l, struct sock *s);
void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
bool bt_sock_linked(struct bt_sock_list *l, struct sock *s);
struct sock *bt_sock_alloc(struct net *net, struct socket *sock,
			   struct proto *prot, int proto, gfp_t prio, int kern);
int  bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
		     int flags);
int  bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
			    size_t len, int flags);
__poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
int  bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
int  bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
int  bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags);

void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh);
void bt_accept_unlink(struct sock *sk);
struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);


struct l2cap_ctrl {
	u8	sframe:1,
		poll:1,
		final:1,
		fcs:1,
		sar:2,
		super:2;

	u16	reqseq;
	u16	txseq;
	u8	retries;
	__le16  psm;
	bdaddr_t bdaddr;
	struct l2cap_chan *chan;
};

struct sco_ctrl {
	u8	pkt_status;
};

struct hci_dev;

typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
				       u16 opcode, struct sk_buff *skb);

#define HCI_REQ_START	BIT(0)
#define HCI_REQ_SKB	BIT(1)

struct hci_ctrl {
	struct sock *sk;
	u16 opcode;
	u8 req_flags;
	u8 req_event;
	union {
		hci_req_complete_t req_complete;
		hci_req_complete_skb_t req_complete_skb;
	};
};

struct mgmt_ctrl {
	struct hci_dev *hdev;
	u16 opcode;
};

struct bt_skb_cb {
	u8 pkt_type;
	u8 force_active;
	u16 expect;
	u8 incoming:1;
	union {
		struct l2cap_ctrl l2cap;
		struct sco_ctrl sco;
		struct hci_ctrl hci;
		struct mgmt_ctrl mgmt;
	};
};
#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))

#define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
#define hci_skb_expect(skb) bt_cb((skb))->expect
#define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
#define hci_skb_event(skb) bt_cb((skb))->hci.req_event
#define hci_skb_sk(skb) bt_cb((skb))->hci.sk

static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
{
	struct sk_buff *skb;

	skb = alloc_skb(len + BT_SKB_RESERVE, how);
	if (skb)
		skb_reserve(skb, BT_SKB_RESERVE);
	return skb;
}

static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
					unsigned long len, int nb, int *err)
{
	struct sk_buff *skb;

	skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
	if (skb)
		skb_reserve(skb, BT_SKB_RESERVE);

	if (!skb && *err)
		return NULL;

	*err = sock_error(sk);
	if (*err)
		goto out;

	if (sk->sk_shutdown) {
		*err = -ECONNRESET;
		goto out;
	}

	return skb;

out:
	kfree_skb(skb);
	return NULL;
}


static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk,
					     struct msghdr *msg,
					     size_t len, size_t mtu,
					     size_t headroom, size_t tailroom)
{
	struct sk_buff *skb;
	size_t size = min_t(size_t, len, mtu);
	int err;

	skb = bt_skb_send_alloc(sk, size + headroom + tailroom,
				msg->msg_flags & MSG_DONTWAIT, &err);
	if (!skb)
		return ERR_PTR(err);

	skb_reserve(skb, headroom);
	skb_tailroom_reserve(skb, mtu, tailroom);

	if (!copy_from_iter_full(skb_put(skb, size), size, &msg->msg_iter)) {
		kfree_skb(skb);
		return ERR_PTR(-EFAULT);
	}

	skb->priority = sk->sk_priority;

	return skb;
}


static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,
					      struct msghdr *msg,
					      size_t len, size_t mtu,
					      size_t headroom, size_t tailroom)
{
	struct sk_buff *skb, **frag;

	skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
	if (IS_ERR(skb))
		return skb;

	len -= skb->len;
	if (!len)
		return skb;

	
	frag = &skb_shinfo(skb)->frag_list;
	while (len) {
		struct sk_buff *tmp;

		tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
		if (IS_ERR(tmp)) {
			return skb;
		}

		len -= tmp->len;

		*frag = tmp;
		frag = &(*frag)->next;
	}

	return skb;
}

static inline int bt_copy_from_sockptr(void *dst, size_t dst_size,
				       sockptr_t src, size_t src_size)
{
	if (dst_size > src_size)
		return -EINVAL;

	return copy_from_sockptr(dst, src, dst_size);
}

int bt_to_errno(u16 code);
__u8 bt_status(int err);

void hci_sock_set_flag(struct sock *sk, int nr);
void hci_sock_clear_flag(struct sock *sk, int nr);
int hci_sock_test_flag(struct sock *sk, int nr);
unsigned short hci_sock_get_channel(struct sock *sk);
u32 hci_sock_get_cookie(struct sock *sk);

int hci_sock_init(void);
void hci_sock_cleanup(void);

int bt_sysfs_init(void);
void bt_sysfs_cleanup(void);

int bt_procfs_init(struct net *net, const char *name,
		   struct bt_sock_list *sk_list,
		   int (*seq_show)(struct seq_file *, void *));
void bt_procfs_cleanup(struct net *net, const char *name);

extern struct dentry *bt_debugfs;

int l2cap_init(void);
void l2cap_exit(void);

#if IS_ENABLED(CONFIG_BT_BREDR)
int sco_init(void);
void sco_exit(void);
#else
static inline int sco_init(void)
{
	return 0;
}

static inline void sco_exit(void)
{
}
#endif

#if IS_ENABLED(CONFIG_BT_LE)
int iso_init(void);
int iso_exit(void);
bool iso_enabled(void);
#else
static inline int iso_init(void)
{
	return 0;
}

static inline int iso_exit(void)
{
	return 0;
}

static inline bool iso_enabled(void)
{
	return false;
}
#endif

int mgmt_init(void);
void mgmt_exit(void);
void mgmt_cleanup(struct sock *sk);

void bt_sock_reclassify_lock(struct sock *sk, int proto);

#endif 
