[linux-2.6-block.git] / include / net / bluetooth / l2cap.h

/*
   BlueZ - Bluetooth protocol stack for Linux
   Copyright (C) 2000-2001 Qualcomm Incorporated
   Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
   Copyright (C) 2010 Google Inc.

   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
   SOFTWARE IS DISCLAIMED.
*/

#ifndef __L2CAP_H
#define __L2CAP_H

/* L2CAP defaults */
#define L2CAP_DEFAULT_MTU		672
#define L2CAP_DEFAULT_MIN_MTU		48
#define L2CAP_DEFAULT_FLUSH_TO		0xffff
#define L2CAP_DEFAULT_TX_WINDOW		63
#define L2CAP_DEFAULT_MAX_TX		3
#define L2CAP_DEFAULT_RETRANS_TO	2000    /* 2 seconds */
#define L2CAP_DEFAULT_MONITOR_TO	12000   /* 12 seconds */
#define L2CAP_DEFAULT_MAX_PDU_SIZE	1009    /* Sized for 3-DH5 packet */
#define L2CAP_DEFAULT_ACK_TO		200
#define L2CAP_LE_DEFAULT_MTU		23

#define L2CAP_DISC_TIMEOUT             (100)
#define L2CAP_DISC_REJ_TIMEOUT         (5000)  /*  5 seconds */
#define L2CAP_ENC_TIMEOUT              (5000)  /*  5 seconds */
#define L2CAP_CONN_TIMEOUT             (40000) /* 40 seconds */
#define L2CAP_INFO_TIMEOUT             (4000)  /*  4 seconds */

/* L2CAP socket address */
struct sockaddr_l2 {
	sa_family_t	l2_family;
	__le16		l2_psm;
	bdaddr_t	l2_bdaddr;
	__le16		l2_cid;
};

/* L2CAP socket options */
#define L2CAP_OPTIONS	0x01
struct l2cap_options {
	__u16 omtu;
	__u16 imtu;
	__u16 flush_to;
	__u8  mode;
	__u8  fcs;
	__u8  max_tx;
	__u16 txwin_size;
};

#define L2CAP_CONNINFO	0x02
struct l2cap_conninfo {
	__u16 hci_handle;
	__u8  dev_class[3];
};

#define L2CAP_LM	0x03
#define L2CAP_LM_MASTER		0x0001
#define L2CAP_LM_AUTH		0x0002
#define L2CAP_LM_ENCRYPT	0x0004
#define L2CAP_LM_TRUSTED	0x0008
#define L2CAP_LM_RELIABLE	0x0010
#define L2CAP_LM_SECURE		0x0020

/* L2CAP command codes */
#define L2CAP_COMMAND_REJ	0x01
#define L2CAP_CONN_REQ		0x02
#define L2CAP_CONN_RSP		0x03
#define L2CAP_CONF_REQ		0x04
#define L2CAP_CONF_RSP		0x05
#define L2CAP_DISCONN_REQ	0x06
#define L2CAP_DISCONN_RSP	0x07
#define L2CAP_ECHO_REQ		0x08
#define L2CAP_ECHO_RSP		0x09
#define L2CAP_INFO_REQ		0x0a
#define L2CAP_INFO_RSP		0x0b
#define L2CAP_CONN_PARAM_UPDATE_REQ	0x12
#define L2CAP_CONN_PARAM_UPDATE_RSP	0x13

/* L2CAP feature mask */
#define L2CAP_FEAT_FLOWCTL	0x00000001
#define L2CAP_FEAT_RETRANS	0x00000002
#define L2CAP_FEAT_ERTM		0x00000008
#define L2CAP_FEAT_STREAMING	0x00000010
#define L2CAP_FEAT_FCS		0x00000020
#define L2CAP_FEAT_FIXED_CHAN	0x00000080

/* L2CAP checksum option */
#define L2CAP_FCS_NONE		0x00
#define L2CAP_FCS_CRC16		0x01

/* L2CAP Control Field bit masks */
#define L2CAP_CTRL_SAR               0xC000
#define L2CAP_CTRL_REQSEQ            0x3F00
#define L2CAP_CTRL_TXSEQ             0x007E
#define L2CAP_CTRL_RETRANS           0x0080
#define L2CAP_CTRL_FINAL             0x0080
#define L2CAP_CTRL_POLL              0x0010
#define L2CAP_CTRL_SUPERVISE         0x000C
#define L2CAP_CTRL_FRAME_TYPE        0x0001 /* I- or S-Frame */

#define L2CAP_CTRL_TXSEQ_SHIFT      1
#define L2CAP_CTRL_REQSEQ_SHIFT     8
#define L2CAP_CTRL_SAR_SHIFT       14

/* L2CAP Supervisory Function */
#define L2CAP_SUPER_RCV_READY           0x0000
#define L2CAP_SUPER_REJECT              0x0004
#define L2CAP_SUPER_RCV_NOT_READY       0x0008
#define L2CAP_SUPER_SELECT_REJECT       0x000C

/* L2CAP Segmentation and Reassembly */
#define L2CAP_SDU_UNSEGMENTED       0x0000
#define L2CAP_SDU_START             0x4000
#define L2CAP_SDU_END               0x8000
#define L2CAP_SDU_CONTINUE          0xC000

/* L2CAP Command rej. reasons */
#define L2CAP_REJ_NOT_UNDERSTOOD      0x0000
#define L2CAP_REJ_MTU_EXCEEDED        0x0001
#define L2CAP_REJ_INVALID_CID         0x0002


/* L2CAP structures */
struct l2cap_hdr {
	__le16     len;
	__le16     cid;
} __packed;
#define L2CAP_HDR_SIZE		4

struct l2cap_cmd_hdr {
	__u8       code;
	__u8       ident;
	__le16     len;
} __packed;
#define L2CAP_CMD_HDR_SIZE	4

struct l2cap_cmd_rej_unk {
	__le16     reason;
} __packed;

struct l2cap_cmd_rej_mtu {
	__le16     reason;
	__le16     max_mtu;
} __packed;

struct l2cap_cmd_rej_cid {
	__le16     reason;
	__le16     scid;
	__le16     dcid;
} __packed;

struct l2cap_conn_req {
	__le16     psm;
	__le16     scid;
} __packed;

struct l2cap_conn_rsp {
	__le16     dcid;
	__le16     scid;
	__le16     result;
	__le16     status;
} __packed;

/* channel indentifier */
#define L2CAP_CID_SIGNALING	0x0001
#define L2CAP_CID_CONN_LESS	0x0002
#define L2CAP_CID_LE_DATA	0x0004
#define L2CAP_CID_LE_SIGNALING	0x0005
#define L2CAP_CID_SMP		0x0006
#define L2CAP_CID_DYN_START	0x0040
#define L2CAP_CID_DYN_END	0xffff

/* connect result */
#define L2CAP_CR_SUCCESS	0x0000
#define L2CAP_CR_PEND		0x0001
#define L2CAP_CR_BAD_PSM	0x0002
#define L2CAP_CR_SEC_BLOCK	0x0003
#define L2CAP_CR_NO_MEM		0x0004

/* connect status */
#define L2CAP_CS_NO_INFO	0x0000
#define L2CAP_CS_AUTHEN_PEND	0x0001
#define L2CAP_CS_AUTHOR_PEND	0x0002

struct l2cap_conf_req {
	__le16     dcid;
	__le16     flags;
	__u8       data[0];
} __packed;

struct l2cap_conf_rsp {
	__le16     scid;
	__le16     flags;
	__le16     result;
	__u8       data[0];
} __packed;

#define L2CAP_CONF_SUCCESS	0x0000
#define L2CAP_CONF_UNACCEPT	0x0001
#define L2CAP_CONF_REJECT	0x0002
#define L2CAP_CONF_UNKNOWN	0x0003

struct l2cap_conf_opt {
	__u8       type;
	__u8       len;
	__u8       val[0];
} __packed;
#define L2CAP_CONF_OPT_SIZE	2

#define L2CAP_CONF_HINT		0x80
#define L2CAP_CONF_MASK		0x7f

#define L2CAP_CONF_MTU		0x01
#define L2CAP_CONF_FLUSH_TO	0x02
#define L2CAP_CONF_QOS		0x03
#define L2CAP_CONF_RFC		0x04
#define L2CAP_CONF_FCS		0x05

#define L2CAP_CONF_MAX_SIZE	22

struct l2cap_conf_rfc {
	__u8       mode;
	__u8       txwin_size;
	__u8       max_transmit;
	__le16     retrans_timeout;
	__le16     monitor_timeout;
	__le16     max_pdu_size;
} __packed;

#define L2CAP_MODE_BASIC	0x00
#define L2CAP_MODE_RETRANS	0x01
#define L2CAP_MODE_FLOWCTL	0x02
#define L2CAP_MODE_ERTM		0x03
#define L2CAP_MODE_STREAMING	0x04

struct l2cap_disconn_req {
	__le16     dcid;
	__le16     scid;
} __packed;

struct l2cap_disconn_rsp {
	__le16     dcid;
	__le16     scid;
} __packed;

struct l2cap_info_req {
	__le16      type;
} __packed;

struct l2cap_info_rsp {
	__le16      type;
	__le16      result;
	__u8        data[0];
} __packed;

/* info type */
#define L2CAP_IT_CL_MTU     0x0001
#define L2CAP_IT_FEAT_MASK  0x0002
#define L2CAP_IT_FIXED_CHAN 0x0003

/* info result */
#define L2CAP_IR_SUCCESS    0x0000
#define L2CAP_IR_NOTSUPP    0x0001

struct l2cap_conn_param_update_req {
	__le16      min;
	__le16      max;
	__le16      latency;
	__le16      to_multiplier;
} __packed;

struct l2cap_conn_param_update_rsp {
	__le16      result;
} __packed;

/* Connection Parameters result */
#define L2CAP_CONN_PARAM_ACCEPTED	0x0000
#define L2CAP_CONN_PARAM_REJECTED	0x0001

/* ----- L2CAP channels and connections ----- */
struct srej_list {
	__u8	tx_seq;
	struct list_head list;
};

struct l2cap_chan {
	struct sock *sk;

	struct l2cap_conn	*conn;

	__u8		state;

	atomic_t	refcnt;

	__le16		psm;
	__u16		dcid;
	__u16		scid;

	__u16		imtu;
	__u16		omtu;
	__u16		flush_to;
	__u8		mode;
	__u8		chan_type;

	__le16		sport;

	__u8		sec_level;
	__u8		role_switch;
	__u8		force_reliable;
	__u8		flushable;
	__u8		force_active;

	__u8		ident;

	__u8		conf_req[64];
	__u8		conf_len;
	__u8		num_conf_req;
	__u8		num_conf_rsp;

	__u8		fcs;

	__u8		tx_win;
	__u8		max_tx;
	__u16		retrans_timeout;
	__u16		monitor_timeout;
	__u16		mps;

	unsigned long	conf_state;
	unsigned long	conn_state;

	__u8		next_tx_seq;
	__u8		expected_ack_seq;
	__u8		expected_tx_seq;
	__u8		buffer_seq;
	__u8		buffer_seq_srej;
	__u8		srej_save_reqseq;
	__u8		frames_sent;
	__u8		unacked_frames;
	__u8		retry_count;
	__u8		num_acked;
	__u16		sdu_len;
	struct sk_buff	*sdu;
	struct sk_buff	*sdu_last_frag;

	__u8		remote_tx_win;
	__u8		remote_max_tx;
	__u16		remote_mps;

	struct timer_list	chan_timer;
	struct timer_list	retrans_timer;
	struct timer_list	monitor_timer;
	struct timer_list	ack_timer;
	struct sk_buff		*tx_send_head;
	struct sk_buff_head	tx_q;
	struct sk_buff_head	srej_q;
	struct list_head	srej_l;

	struct list_head list;
	struct list_head global_l;

	void		*data;
	struct l2cap_ops *ops;
};

struct l2cap_ops {
	char		*name;

	struct l2cap_chan	*(*new_connection) (void *data);
	int			(*recv) (void *data, struct sk_buff *skb);
	void			(*close) (void *data);
	void			(*state_change) (void *data, int state);
};

struct l2cap_conn {
	struct hci_conn	*hcon;

	bdaddr_t	*dst;
	bdaddr_t	*src;

	unsigned int	mtu;

	__u32		feat_mask;

	__u8		info_state;
	__u8		info_ident;

	struct timer_list info_timer;

	spinlock_t	lock;

	struct sk_buff *rx_skb;
	__u32		rx_len;
	__u8		tx_ident;

	__u8		disc_reason;

	struct timer_list security_timer;
	struct smp_chan *smp_chan;

	struct list_head chan_l;
	rwlock_t	chan_lock;
};

#define L2CAP_INFO_CL_MTU_REQ_SENT	0x01
#define L2CAP_INFO_FEAT_MASK_REQ_SENT	0x04
#define L2CAP_INFO_FEAT_MASK_REQ_DONE	0x08

#define L2CAP_CHAN_RAW			1
#define L2CAP_CHAN_CONN_LESS		2
#define L2CAP_CHAN_CONN_ORIENTED	3

/* ----- L2CAP socket info ----- */
#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)

struct l2cap_pinfo {
	struct bt_sock	bt;
	struct l2cap_chan	*chan;
	struct sk_buff	*rx_busy_skb;
};

enum {
	CONF_REQ_SENT,
	CONF_INPUT_DONE,
	CONF_OUTPUT_DONE,
	CONF_MTU_DONE,
	CONF_MODE_DONE,
	CONF_CONNECT_PEND,
	CONF_NO_FCS_RECV,
	CONF_STATE2_DEVICE,
};

#define L2CAP_CONF_MAX_CONF_REQ 2
#define L2CAP_CONF_MAX_CONF_RSP 2

enum {
	CONN_SREJ_SENT,
	CONN_WAIT_F,
	CONN_SREJ_ACT,
	CONN_SEND_PBIT,
	CONN_REMOTE_BUSY,
	CONN_LOCAL_BUSY,
	CONN_REJ_ACT,
	CONN_SEND_FBIT,
	CONN_RNR_SENT,
};

#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
#define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
		L2CAP_DEFAULT_RETRANS_TO);
#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
#define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
		L2CAP_DEFAULT_MONITOR_TO);
#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
		L2CAP_DEFAULT_ACK_TO);
#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)

static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
{
	int sub;

	sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;

	if (sub < 0)
		sub += 64;

	return sub == ch->remote_tx_win;
}

#define __get_txseq(ctrl)	(((ctrl) & L2CAP_CTRL_TXSEQ) >> 1)
#define __get_reqseq(ctrl)	(((ctrl) & L2CAP_CTRL_REQSEQ) >> 8)
#define __is_iframe(ctrl)	(!((ctrl) & L2CAP_CTRL_FRAME_TYPE))
#define __is_sframe(ctrl)	((ctrl) & L2CAP_CTRL_FRAME_TYPE)
#define __is_sar_start(ctrl)	(((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START)

extern int disable_ertm;

int l2cap_init_sockets(void);
void l2cap_cleanup_sockets(void);

void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
int __l2cap_wait_ack(struct sock *sk);

int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
int l2cap_add_scid(struct l2cap_chan *chan,  __u16 scid);

struct l2cap_chan *l2cap_chan_create(struct sock *sk);
void l2cap_chan_close(struct l2cap_chan *chan, int reason);
void l2cap_chan_destroy(struct l2cap_chan *chan);
int l2cap_chan_connect(struct l2cap_chan *chan);
int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
void l2cap_chan_busy(struct l2cap_chan *chan, int busy);

#endif /* __L2CAP_H */
Commit	Line	Data
be21871f	1	/*
1da177e4 LT	2	BlueZ - Bluetooth protocol stack for Linux
1da177e4 LT	3	Copyright (C) 2000-2001 Qualcomm Incorporated
ce5706bd	4	Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
5d8868ff	5	Copyright (C) 2010 Google Inc.
1da177e4 LT	6
	7	Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
	8
	9	This program is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License version 2 as
	11	published by the Free Software Foundation;
	12
	13	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	14	OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	15	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
	16	IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
be21871f AE	17	CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
	18	WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	19	ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4 LT	20	OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1da177e4 LT	21
be21871f AE	22	ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
be21871f AE	23	COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4 LT	24	SOFTWARE IS DISCLAIMED.
	25	*/
	26
	27	#ifndef __L2CAP_H
	28	#define __L2CAP_H
	29
	30	/* L2CAP defaults */
47ec1dcd	31	#define L2CAP_DEFAULT_MTU 672
f2fcfcd6	32	#define L2CAP_DEFAULT_MIN_MTU 48
47ec1dcd	33	#define L2CAP_DEFAULT_FLUSH_TO 0xffff
1c2acffb	34	#define L2CAP_DEFAULT_TX_WINDOW 63
e90bac06	35	#define L2CAP_DEFAULT_MAX_TX 3
fa235562	36	#define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */
e90bac06	37	#define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
db12d647	38	#define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */
c1b4f43b	39	#define L2CAP_DEFAULT_ACK_TO 200
b62f328b	40	#define L2CAP_LE_DEFAULT_MTU 23
1da177e4	41
f3f668b0 AK	42	#define L2CAP_DISC_TIMEOUT (100)
	43	#define L2CAP_DISC_REJ_TIMEOUT (5000) /* 5 seconds */
	44	#define L2CAP_ENC_TIMEOUT (5000) /* 5 seconds */
	45	#define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */
	46	#define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */
1da177e4 LT	47
	48	/* L2CAP socket address */
	49	struct sockaddr_l2 {
	50	sa_family_t l2_family;
8e036fc3	51	__le16 l2_psm;
1da177e4	52	bdaddr_t l2_bdaddr;
f29972de	53	__le16 l2_cid;
1da177e4 LT	54	};
	55
	56	/* L2CAP socket options */
	57	#define L2CAP_OPTIONS 0x01
	58	struct l2cap_options {
	59	__u16 omtu;
	60	__u16 imtu;
	61	__u16 flush_to;
	62	__u8 mode;
fcc203c3	63	__u8 fcs;
68d7f0ce	64	__u8 max_tx;
14b5aa71	65	__u16 txwin_size;
1da177e4 LT	66	};
	67
	68	#define L2CAP_CONNINFO 0x02
	69	struct l2cap_conninfo {
	70	__u16 hci_handle;
	71	__u8 dev_class[3];
	72	};
	73
	74	#define L2CAP_LM 0x03
	75	#define L2CAP_LM_MASTER 0x0001
	76	#define L2CAP_LM_AUTH 0x0002
	77	#define L2CAP_LM_ENCRYPT 0x0004
	78	#define L2CAP_LM_TRUSTED 0x0008
	79	#define L2CAP_LM_RELIABLE 0x0010
	80	#define L2CAP_LM_SECURE 0x0020
	81
	82	/* L2CAP command codes */
47ec1dcd MH	83	#define L2CAP_COMMAND_REJ 0x01
	84	#define L2CAP_CONN_REQ 0x02
	85	#define L2CAP_CONN_RSP 0x03
	86	#define L2CAP_CONF_REQ 0x04
	87	#define L2CAP_CONF_RSP 0x05
	88	#define L2CAP_DISCONN_REQ 0x06
	89	#define L2CAP_DISCONN_RSP 0x07
	90	#define L2CAP_ECHO_REQ 0x08
	91	#define L2CAP_ECHO_RSP 0x09
	92	#define L2CAP_INFO_REQ 0x0a
	93	#define L2CAP_INFO_RSP 0x0b
3300d9a9 CT	94	#define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
3300d9a9 CT	95	#define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
47ec1dcd MH	96
	97	/* L2CAP feature mask */
	98	#define L2CAP_FEAT_FLOWCTL 0x00000001
	99	#define L2CAP_FEAT_RETRANS 0x00000002
	100	#define L2CAP_FEAT_ERTM 0x00000008
	101	#define L2CAP_FEAT_STREAMING 0x00000010
	102	#define L2CAP_FEAT_FCS 0x00000020
	103	#define L2CAP_FEAT_FIXED_CHAN 0x00000080
	104
	105	/* L2CAP checksum option */
	106	#define L2CAP_FCS_NONE 0x00
	107	#define L2CAP_FCS_CRC16 0x01
1da177e4	108
1c2acffb GP	109	/* L2CAP Control Field bit masks */
	110	#define L2CAP_CTRL_SAR 0xC000
	111	#define L2CAP_CTRL_REQSEQ 0x3F00
	112	#define L2CAP_CTRL_TXSEQ 0x007E
	113	#define L2CAP_CTRL_RETRANS 0x0080
	114	#define L2CAP_CTRL_FINAL 0x0080
	115	#define L2CAP_CTRL_POLL 0x0010
	116	#define L2CAP_CTRL_SUPERVISE 0x000C
	117	#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
	118
	119	#define L2CAP_CTRL_TXSEQ_SHIFT 1
	120	#define L2CAP_CTRL_REQSEQ_SHIFT 8
8f17154f	121	#define L2CAP_CTRL_SAR_SHIFT 14
1c2acffb GP	122
	123	/* L2CAP Supervisory Function */
	124	#define L2CAP_SUPER_RCV_READY 0x0000
	125	#define L2CAP_SUPER_REJECT 0x0004
	126	#define L2CAP_SUPER_RCV_NOT_READY 0x0008
	127	#define L2CAP_SUPER_SELECT_REJECT 0x000C
	128
	129	/* L2CAP Segmentation and Reassembly */
	130	#define L2CAP_SDU_UNSEGMENTED 0x0000
	131	#define L2CAP_SDU_START 0x4000
	132	#define L2CAP_SDU_END 0x8000
	133	#define L2CAP_SDU_CONTINUE 0xC000
	134
e2fd318e IK	135	/* L2CAP Command rej. reasons */
	136	#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
	137	#define L2CAP_REJ_MTU_EXCEEDED 0x0001
	138	#define L2CAP_REJ_INVALID_CID 0x0002
	139
	140
1da177e4 LT	141	/* L2CAP structures */
1da177e4 LT	142	struct l2cap_hdr {
8e036fc3 AV	143	__le16 len;
8e036fc3 AV	144	__le16 cid;
66c853cc	145	} __packed;
1da177e4 LT	146	#define L2CAP_HDR_SIZE 4
	147
	148	struct l2cap_cmd_hdr {
	149	__u8 code;
	150	__u8 ident;
8e036fc3	151	__le16 len;
66c853cc	152	} __packed;
1da177e4 LT	153	#define L2CAP_CMD_HDR_SIZE 4
1da177e4 LT	154
e2fd318e IK	155	struct l2cap_cmd_rej_unk {
	156	__le16 reason;
	157	} __packed;
	158
	159	struct l2cap_cmd_rej_mtu {
8e036fc3	160	__le16 reason;
e2fd318e IK	161	__le16 max_mtu;
	162	} __packed;
	163
	164	struct l2cap_cmd_rej_cid {
	165	__le16 reason;
	166	__le16 scid;
	167	__le16 dcid;
66c853cc	168	} __packed;
1da177e4 LT	169
1da177e4 LT	170	struct l2cap_conn_req {
8e036fc3 AV	171	__le16 psm;
8e036fc3 AV	172	__le16 scid;
66c853cc	173	} __packed;
1da177e4 LT	174
1da177e4 LT	175	struct l2cap_conn_rsp {
8e036fc3 AV	176	__le16 dcid;
	177	__le16 scid;
	178	__le16 result;
	179	__le16 status;
66c853cc	180	} __packed;
1da177e4	181
8db4dc46 GP	182	/* channel indentifier */
	183	#define L2CAP_CID_SIGNALING 0x0001
	184	#define L2CAP_CID_CONN_LESS 0x0002
acd7d370 VT	185	#define L2CAP_CID_LE_DATA 0x0004
	186	#define L2CAP_CID_LE_SIGNALING 0x0005
	187	#define L2CAP_CID_SMP 0x0006
8db4dc46 GP	188	#define L2CAP_CID_DYN_START 0x0040
	189	#define L2CAP_CID_DYN_END 0xffff
	190
1da177e4	191	/* connect result */
47ec1dcd MH	192	#define L2CAP_CR_SUCCESS 0x0000
	193	#define L2CAP_CR_PEND 0x0001
	194	#define L2CAP_CR_BAD_PSM 0x0002
	195	#define L2CAP_CR_SEC_BLOCK 0x0003
	196	#define L2CAP_CR_NO_MEM 0x0004
1da177e4 LT	197
1da177e4 LT	198	/* connect status */
47ec1dcd MH	199	#define L2CAP_CS_NO_INFO 0x0000
	200	#define L2CAP_CS_AUTHEN_PEND 0x0001
	201	#define L2CAP_CS_AUTHOR_PEND 0x0002
1da177e4 LT	202
1da177e4 LT	203	struct l2cap_conf_req {
8e036fc3 AV	204	__le16 dcid;
8e036fc3 AV	205	__le16 flags;
1da177e4	206	__u8 data[0];
66c853cc	207	} __packed;
1da177e4 LT	208
1da177e4 LT	209	struct l2cap_conf_rsp {
8e036fc3 AV	210	__le16 scid;
	211	__le16 flags;
	212	__le16 result;
1da177e4	213	__u8 data[0];
66c853cc	214	} __packed;
1da177e4	215
5dee9e7c MH	216	#define L2CAP_CONF_SUCCESS 0x0000
	217	#define L2CAP_CONF_UNACCEPT 0x0001
	218	#define L2CAP_CONF_REJECT 0x0002
	219	#define L2CAP_CONF_UNKNOWN 0x0003
1da177e4 LT	220
	221	struct l2cap_conf_opt {
	222	__u8 type;
	223	__u8 len;
	224	__u8 val[0];
66c853cc	225	} __packed;
1da177e4 LT	226	#define L2CAP_CONF_OPT_SIZE 2
1da177e4 LT	227
589d2746	228	#define L2CAP_CONF_HINT 0x80
47ec1dcd	229	#define L2CAP_CONF_MASK 0x7f
589d2746	230
1da177e4 LT	231	#define L2CAP_CONF_MTU 0x01
	232	#define L2CAP_CONF_FLUSH_TO 0x02
	233	#define L2CAP_CONF_QOS 0x03
	234	#define L2CAP_CONF_RFC 0x04
47ec1dcd	235	#define L2CAP_CONF_FCS 0x05
1da177e4 LT	236
	237	#define L2CAP_CONF_MAX_SIZE 22
	238
6464f35f MH	239	struct l2cap_conf_rfc {
	240	__u8 mode;
	241	__u8 txwin_size;
	242	__u8 max_transmit;
	243	__le16 retrans_timeout;
	244	__le16 monitor_timeout;
	245	__le16 max_pdu_size;
66c853cc	246	} __packed;
6464f35f MH	247
	248	#define L2CAP_MODE_BASIC 0x00
	249	#define L2CAP_MODE_RETRANS 0x01
	250	#define L2CAP_MODE_FLOWCTL 0x02
47ec1dcd	251	#define L2CAP_MODE_ERTM 0x03
c6b03cf9	252	#define L2CAP_MODE_STREAMING 0x04
6464f35f	253
1da177e4	254	struct l2cap_disconn_req {
8e036fc3 AV	255	__le16 dcid;
8e036fc3 AV	256	__le16 scid;
66c853cc	257	} __packed;
1da177e4 LT	258
1da177e4 LT	259	struct l2cap_disconn_rsp {
8e036fc3 AV	260	__le16 dcid;
8e036fc3 AV	261	__le16 scid;
66c853cc	262	} __packed;
1da177e4 LT	263
1da177e4 LT	264	struct l2cap_info_req {
8e036fc3	265	__le16 type;
66c853cc	266	} __packed;
1da177e4 LT	267
1da177e4 LT	268	struct l2cap_info_rsp {
8e036fc3 AV	269	__le16 type;
8e036fc3 AV	270	__le16 result;
1da177e4	271	__u8 data[0];
66c853cc	272	} __packed;
1da177e4 LT	273
	274	/* info type */
	275	#define L2CAP_IT_CL_MTU 0x0001
	276	#define L2CAP_IT_FEAT_MASK 0x0002
e1027a7c	277	#define L2CAP_IT_FIXED_CHAN 0x0003
1da177e4 LT	278
	279	/* info result */
	280	#define L2CAP_IR_SUCCESS 0x0000
	281	#define L2CAP_IR_NOTSUPP 0x0001
	282
de73115a CT	283	struct l2cap_conn_param_update_req {
	284	__le16 min;
	285	__le16 max;
	286	__le16 latency;
	287	__le16 to_multiplier;
	288	} __packed;
	289
	290	struct l2cap_conn_param_update_rsp {
	291	__le16 result;
	292	} __packed;
	293
	294	/* Connection Parameters result */
	295	#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
	296	#define L2CAP_CONN_PARAM_REJECTED 0x0001
	297
48454079	298	/* ----- L2CAP channels and connections ----- */
39d5a3ee GP	299	struct srej_list {
	300	__u8 tx_seq;
	301	struct list_head list;
	302	};
	303
48454079 GP	304	struct l2cap_chan {
48454079 GP	305	struct sock *sk;
8c1d787b GP	306
	307	struct l2cap_conn *conn;
	308
89bc500e GP	309	__u8 state;
89bc500e GP	310
71ba0e56 GP	311	atomic_t refcnt;
71ba0e56 GP	312
fe4128e0 GP	313	__le16 psm;
	314	__u16 dcid;
	315	__u16 scid;
4343478f	316
0c1bc5c6 GP	317	__u16 imtu;
	318	__u16 omtu;
	319	__u16 flush_to;
	320	__u8 mode;
715ec005	321	__u8 chan_type;
0c1bc5c6 GP	322
	323	__le16 sport;
	324
4343478f GP	325	__u8 sec_level;
	326	__u8 role_switch;
	327	__u8 force_reliable;
	328	__u8 flushable;
14b12d0b	329	__u8 force_active;
4343478f	330
fc7f8a7e GP	331	__u8 ident;
fc7f8a7e GP	332
73ffa904 GP	333	__u8 conf_req[64];
	334	__u8 conf_len;
	335	__u8 num_conf_req;
	336	__u8 num_conf_rsp;
	337
47d1ec61 GP	338	__u8 fcs;
	339
	340	__u8 tx_win;
	341	__u8 max_tx;
	342	__u16 retrans_timeout;
	343	__u16 monitor_timeout;
	344	__u16 mps;
	345
c1360a1c	346	unsigned long conf_state;
e2ab4353	347	unsigned long conn_state;
525cd185	348
42e5c802 GP	349	__u8 next_tx_seq;
	350	__u8 expected_ack_seq;
	351	__u8 expected_tx_seq;
	352	__u8 buffer_seq;
	353	__u8 buffer_seq_srej;
6a026610 GP	354	__u8 srej_save_reqseq;
	355	__u8 frames_sent;
	356	__u8 unacked_frames;
	357	__u8 retry_count;
	358	__u8 num_acked;
6f61fd47	359	__u16 sdu_len;
6f61fd47	360	struct sk_buff *sdu;
84084a31	361	struct sk_buff *sdu_last_frag;
6f61fd47	362
2c03a7a4 GP	363	__u8 remote_tx_win;
	364	__u8 remote_max_tx;
	365	__u16 remote_mps;
42e5c802	366
ab07801d	367	struct timer_list chan_timer;
e92c8e70 GP	368	struct timer_list retrans_timer;
	369	struct timer_list monitor_timer;
	370	struct timer_list ack_timer;
58d35f87 GP	371	struct sk_buff *tx_send_head;
58d35f87 GP	372	struct sk_buff_head tx_q;
f1c6775b	373	struct sk_buff_head srej_q;
39d5a3ee	374	struct list_head srej_l;
e92c8e70	375
baa7e1fa	376	struct list_head list;
23691d75	377	struct list_head global_l;
80808e43 GP	378
	379	void *data;
	380	struct l2cap_ops *ops;
	381	};
	382
	383	struct l2cap_ops {
	384	char *name;
	385
	386	struct l2cap_chan (new_connection) (void *data);
23070494	387	int (recv) (void data, struct sk_buff *skb);
ba3bd0ee	388	void (close) (void data);
89bc500e	389	void (state_change) (void data, int state);
1da177e4 LT	390	};
	391
	392	struct l2cap_conn {
	393	struct hci_conn *hcon;
	394
	395	bdaddr_t *dst;
	396	bdaddr_t *src;
	397
	398	unsigned int mtu;
	399
4e8402a3 MH	400	__u32 feat_mask;
	401
	402	__u8 info_state;
	403	__u8 info_ident;
	404
	405	struct timer_list info_timer;
	406
1da177e4 LT	407	spinlock_t lock;
	408
	409	struct sk_buff *rx_skb;
	410	__u32 rx_len;
1da177e4 LT	411	__u8 tx_ident;
1da177e4 LT	412
2950f21a MH	413	__u8 disc_reason;
2950f21a MH	414
5d3de7df	415	struct timer_list security_timer;
1c1def09	416	struct smp_chan *smp_chan;
5d3de7df	417
baa7e1fa GP	418	struct list_head chan_l;
baa7e1fa GP	419	rwlock_t chan_lock;
1da177e4 LT	420	};
1da177e4 LT	421
4e8402a3	422	#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
984947dc MH	423	#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
984947dc MH	424	#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
4e8402a3	425
715ec005 GP	426	#define L2CAP_CHAN_RAW 1
	427	#define L2CAP_CHAN_CONN_LESS 2
	428	#define L2CAP_CHAN_CONN_ORIENTED 3
	429
48454079	430	/* ----- L2CAP socket info ----- */
1da177e4 LT	431	#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
	432
	433	struct l2cap_pinfo {
	434	struct bt_sock bt;
48454079	435	struct l2cap_chan *chan;
e328140f	436	struct sk_buff *rx_busy_skb;
1da177e4 LT	437	};
1da177e4 LT	438
c1360a1c GP	439	enum {
	440	CONF_REQ_SENT,
	441	CONF_INPUT_DONE,
	442	CONF_OUTPUT_DONE,
	443	CONF_MTU_DONE,
	444	CONF_MODE_DONE,
	445	CONF_CONNECT_PEND,
	446	CONF_NO_FCS_RECV,
	447	CONF_STATE2_DEVICE,
	448	};
f2fcfcd6 GP	449
	450	#define L2CAP_CONF_MAX_CONF_REQ 2
	451	#define L2CAP_CONF_MAX_CONF_RSP 2
861d6882	452
e2ab4353	453	enum {
e2ab4353 GP	454	CONN_SREJ_SENT,
	455	CONN_WAIT_F,
	456	CONN_SREJ_ACT,
	457	CONN_SEND_PBIT,
	458	CONN_REMOTE_BUSY,
	459	CONN_LOCAL_BUSY,
	460	CONN_REJ_ACT,
	461	CONN_SEND_FBIT,
	462	CONN_RNR_SENT,
e2ab4353	463	};
e90bac06	464
c9b66675 GP	465	#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
c9b66675 GP	466	#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
1a09bcb9 GP	467	#define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
	468	L2CAP_DEFAULT_RETRANS_TO);
	469	#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
	470	#define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
	471	L2CAP_DEFAULT_MONITOR_TO);
	472	#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
	473	#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
	474	L2CAP_DEFAULT_ACK_TO);
	475	#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
c74e560c	476
42e5c802	477	static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
1c2acffb	478	{
1c2acffb GP	479	int sub;
1c2acffb GP	480
42e5c802	481	sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
1c2acffb GP	482
	483	if (sub < 0)
	484	sub += 64;
	485
2c03a7a4	486	return sub == ch->remote_tx_win;
1c2acffb GP	487	}
1c2acffb GP	488
894718a6 AE	489	#define __get_txseq(ctrl) (((ctrl) & L2CAP_CTRL_TXSEQ) >> 1)
	490	#define __get_reqseq(ctrl) (((ctrl) & L2CAP_CTRL_REQSEQ) >> 8)
	491	#define __is_iframe(ctrl) (!((ctrl) & L2CAP_CTRL_FRAME_TYPE))
	492	#define __is_sframe(ctrl) ((ctrl) & L2CAP_CTRL_FRAME_TYPE)
	493	#define __is_sar_start(ctrl) (((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START)
1da177e4	494
bb58f747	495	extern int disable_ertm;
bb58f747 GP	496
	497	int l2cap_init_sockets(void);
	498	void l2cap_cleanup_sockets(void);
	499
8c1d787b	500	void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
dcba0dba	501	int __l2cap_wait_ack(struct sock *sk);
68983259	502
9e4425ff GP	503	int l2cap_add_psm(struct l2cap_chan chan, bdaddr_t src, __le16 psm);
	504	int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
	505
23691d75	506	struct l2cap_chan l2cap_chan_create(struct sock sk);
0f852724	507	void l2cap_chan_close(struct l2cap_chan *chan, int reason);
23691d75	508	void l2cap_chan_destroy(struct l2cap_chan *chan);
77a74c7e	509	int l2cap_chan_connect(struct l2cap_chan *chan);
9a91a04a	510	int l2cap_chan_send(struct l2cap_chan chan, struct msghdr msg, size_t len);
e328140f	511	void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
bb58f747	512
1da177e4	513	#endif /* __L2CAP_H */