[mirror_ubuntu-jammy-kernel.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_LOCAL_BUSY_TRIES		12
#define L2CAP_LE_DEFAULT_MTU		23

#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 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 {
	__le16     reason;
} __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;

	__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;

	__u8		conf_state;
	__u16		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;
	__u16		partial_sdu_len;
	struct sk_buff	*sdu;

	__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 sk_buff_head	busy_q;
	struct work_struct	busy_work;
	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 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;
};

#define L2CAP_CONF_REQ_SENT       0x01
#define L2CAP_CONF_INPUT_DONE     0x02
#define L2CAP_CONF_OUTPUT_DONE    0x04
#define L2CAP_CONF_MTU_DONE       0x08
#define L2CAP_CONF_MODE_DONE      0x10
#define L2CAP_CONF_CONNECT_PEND   0x20
#define L2CAP_CONF_NO_FCS_RECV    0x40
#define L2CAP_CONF_STATE2_DEVICE  0x80

#define L2CAP_CONF_MAX_CONF_REQ 2
#define L2CAP_CONF_MAX_CONF_RSP 2

#define L2CAP_CONN_SAR_SDU         0x0001
#define L2CAP_CONN_SREJ_SENT       0x0002
#define L2CAP_CONN_WAIT_F          0x0004
#define L2CAP_CONN_SREJ_ACT        0x0008
#define L2CAP_CONN_SEND_PBIT       0x0010
#define L2CAP_CONN_REMOTE_BUSY     0x0020
#define L2CAP_CONN_LOCAL_BUSY      0x0040
#define L2CAP_CONN_REJ_ACT         0x0080
#define L2CAP_CONN_SEND_FBIT       0x0100
#define L2CAP_CONN_RNR_SENT        0x0200
#define L2CAP_CONN_SAR_RETRY       0x0400

#define __mod_retrans_timer() mod_timer(&chan->retrans_timer, \
		jiffies +  msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
#define __mod_monitor_timer() mod_timer(&chan->monitor_timer, \
		jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
#define __mod_ack_timer() mod_timer(&chan->ack_timer, \
		jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));

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);

#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
1890d36b	40	#define L2CAP_LOCAL_BUSY_TRIES 12
b62f328b	41	#define L2CAP_LE_DEFAULT_MTU 23
1da177e4	42
4e8402a3 MH	43	#define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */
4e8402a3 MH	44	#define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */
1da177e4 LT	45
	46	/* L2CAP socket address */
	47	struct sockaddr_l2 {
	48	sa_family_t l2_family;
8e036fc3	49	__le16 l2_psm;
1da177e4	50	bdaddr_t l2_bdaddr;
f29972de	51	__le16 l2_cid;
1da177e4 LT	52	};
	53
	54	/* L2CAP socket options */
	55	#define L2CAP_OPTIONS 0x01
	56	struct l2cap_options {
	57	__u16 omtu;
	58	__u16 imtu;
	59	__u16 flush_to;
	60	__u8 mode;
fcc203c3	61	__u8 fcs;
68d7f0ce	62	__u8 max_tx;
14b5aa71	63	__u16 txwin_size;
1da177e4 LT	64	};
	65
	66	#define L2CAP_CONNINFO 0x02
	67	struct l2cap_conninfo {
	68	__u16 hci_handle;
	69	__u8 dev_class[3];
	70	};
	71
	72	#define L2CAP_LM 0x03
	73	#define L2CAP_LM_MASTER 0x0001
	74	#define L2CAP_LM_AUTH 0x0002
	75	#define L2CAP_LM_ENCRYPT 0x0004
	76	#define L2CAP_LM_TRUSTED 0x0008
	77	#define L2CAP_LM_RELIABLE 0x0010
	78	#define L2CAP_LM_SECURE 0x0020
	79
	80	/* L2CAP command codes */
47ec1dcd MH	81	#define L2CAP_COMMAND_REJ 0x01
	82	#define L2CAP_CONN_REQ 0x02
	83	#define L2CAP_CONN_RSP 0x03
	84	#define L2CAP_CONF_REQ 0x04
	85	#define L2CAP_CONF_RSP 0x05
	86	#define L2CAP_DISCONN_REQ 0x06
	87	#define L2CAP_DISCONN_RSP 0x07
	88	#define L2CAP_ECHO_REQ 0x08
	89	#define L2CAP_ECHO_RSP 0x09
	90	#define L2CAP_INFO_REQ 0x0a
	91	#define L2CAP_INFO_RSP 0x0b
3300d9a9 CT	92	#define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
3300d9a9 CT	93	#define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
47ec1dcd MH	94
	95	/* L2CAP feature mask */
	96	#define L2CAP_FEAT_FLOWCTL 0x00000001
	97	#define L2CAP_FEAT_RETRANS 0x00000002
	98	#define L2CAP_FEAT_ERTM 0x00000008
	99	#define L2CAP_FEAT_STREAMING 0x00000010
	100	#define L2CAP_FEAT_FCS 0x00000020
	101	#define L2CAP_FEAT_FIXED_CHAN 0x00000080
	102
	103	/* L2CAP checksum option */
	104	#define L2CAP_FCS_NONE 0x00
	105	#define L2CAP_FCS_CRC16 0x01
1da177e4	106
1c2acffb GP	107	/* L2CAP Control Field bit masks */
	108	#define L2CAP_CTRL_SAR 0xC000
	109	#define L2CAP_CTRL_REQSEQ 0x3F00
	110	#define L2CAP_CTRL_TXSEQ 0x007E
	111	#define L2CAP_CTRL_RETRANS 0x0080
	112	#define L2CAP_CTRL_FINAL 0x0080
	113	#define L2CAP_CTRL_POLL 0x0010
	114	#define L2CAP_CTRL_SUPERVISE 0x000C
	115	#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
	116
	117	#define L2CAP_CTRL_TXSEQ_SHIFT 1
	118	#define L2CAP_CTRL_REQSEQ_SHIFT 8
8f17154f	119	#define L2CAP_CTRL_SAR_SHIFT 14
1c2acffb GP	120
	121	/* L2CAP Supervisory Function */
	122	#define L2CAP_SUPER_RCV_READY 0x0000
	123	#define L2CAP_SUPER_REJECT 0x0004
	124	#define L2CAP_SUPER_RCV_NOT_READY 0x0008
	125	#define L2CAP_SUPER_SELECT_REJECT 0x000C
	126
	127	/* L2CAP Segmentation and Reassembly */
	128	#define L2CAP_SDU_UNSEGMENTED 0x0000
	129	#define L2CAP_SDU_START 0x4000
	130	#define L2CAP_SDU_END 0x8000
	131	#define L2CAP_SDU_CONTINUE 0xC000
	132
1da177e4 LT	133	/* L2CAP structures */
1da177e4 LT	134	struct l2cap_hdr {
8e036fc3 AV	135	__le16 len;
8e036fc3 AV	136	__le16 cid;
66c853cc	137	} __packed;
1da177e4 LT	138	#define L2CAP_HDR_SIZE 4
	139
	140	struct l2cap_cmd_hdr {
	141	__u8 code;
	142	__u8 ident;
8e036fc3	143	__le16 len;
66c853cc	144	} __packed;
1da177e4 LT	145	#define L2CAP_CMD_HDR_SIZE 4
	146
	147	struct l2cap_cmd_rej {
8e036fc3	148	__le16 reason;
66c853cc	149	} __packed;
1da177e4 LT	150
1da177e4 LT	151	struct l2cap_conn_req {
8e036fc3 AV	152	__le16 psm;
8e036fc3 AV	153	__le16 scid;
66c853cc	154	} __packed;
1da177e4 LT	155
1da177e4 LT	156	struct l2cap_conn_rsp {
8e036fc3 AV	157	__le16 dcid;
	158	__le16 scid;
	159	__le16 result;
	160	__le16 status;
66c853cc	161	} __packed;
1da177e4	162
8db4dc46 GP	163	/* channel indentifier */
	164	#define L2CAP_CID_SIGNALING 0x0001
	165	#define L2CAP_CID_CONN_LESS 0x0002
acd7d370 VT	166	#define L2CAP_CID_LE_DATA 0x0004
	167	#define L2CAP_CID_LE_SIGNALING 0x0005
	168	#define L2CAP_CID_SMP 0x0006
8db4dc46 GP	169	#define L2CAP_CID_DYN_START 0x0040
	170	#define L2CAP_CID_DYN_END 0xffff
	171
1da177e4	172	/* connect result */
47ec1dcd MH	173	#define L2CAP_CR_SUCCESS 0x0000
	174	#define L2CAP_CR_PEND 0x0001
	175	#define L2CAP_CR_BAD_PSM 0x0002
	176	#define L2CAP_CR_SEC_BLOCK 0x0003
	177	#define L2CAP_CR_NO_MEM 0x0004
1da177e4 LT	178
1da177e4 LT	179	/* connect status */
47ec1dcd MH	180	#define L2CAP_CS_NO_INFO 0x0000
	181	#define L2CAP_CS_AUTHEN_PEND 0x0001
	182	#define L2CAP_CS_AUTHOR_PEND 0x0002
1da177e4 LT	183
1da177e4 LT	184	struct l2cap_conf_req {
8e036fc3 AV	185	__le16 dcid;
8e036fc3 AV	186	__le16 flags;
1da177e4	187	__u8 data[0];
66c853cc	188	} __packed;
1da177e4 LT	189
1da177e4 LT	190	struct l2cap_conf_rsp {
8e036fc3 AV	191	__le16 scid;
	192	__le16 flags;
	193	__le16 result;
1da177e4	194	__u8 data[0];
66c853cc	195	} __packed;
1da177e4	196
5dee9e7c MH	197	#define L2CAP_CONF_SUCCESS 0x0000
	198	#define L2CAP_CONF_UNACCEPT 0x0001
	199	#define L2CAP_CONF_REJECT 0x0002
	200	#define L2CAP_CONF_UNKNOWN 0x0003
1da177e4 LT	201
	202	struct l2cap_conf_opt {
	203	__u8 type;
	204	__u8 len;
	205	__u8 val[0];
66c853cc	206	} __packed;
1da177e4 LT	207	#define L2CAP_CONF_OPT_SIZE 2
1da177e4 LT	208
589d2746	209	#define L2CAP_CONF_HINT 0x80
47ec1dcd	210	#define L2CAP_CONF_MASK 0x7f
589d2746	211
1da177e4 LT	212	#define L2CAP_CONF_MTU 0x01
	213	#define L2CAP_CONF_FLUSH_TO 0x02
	214	#define L2CAP_CONF_QOS 0x03
	215	#define L2CAP_CONF_RFC 0x04
47ec1dcd	216	#define L2CAP_CONF_FCS 0x05
1da177e4 LT	217
	218	#define L2CAP_CONF_MAX_SIZE 22
	219
6464f35f MH	220	struct l2cap_conf_rfc {
	221	__u8 mode;
	222	__u8 txwin_size;
	223	__u8 max_transmit;
	224	__le16 retrans_timeout;
	225	__le16 monitor_timeout;
	226	__le16 max_pdu_size;
66c853cc	227	} __packed;
6464f35f MH	228
	229	#define L2CAP_MODE_BASIC 0x00
	230	#define L2CAP_MODE_RETRANS 0x01
	231	#define L2CAP_MODE_FLOWCTL 0x02
47ec1dcd	232	#define L2CAP_MODE_ERTM 0x03
c6b03cf9	233	#define L2CAP_MODE_STREAMING 0x04
6464f35f	234
1da177e4	235	struct l2cap_disconn_req {
8e036fc3 AV	236	__le16 dcid;
8e036fc3 AV	237	__le16 scid;
66c853cc	238	} __packed;
1da177e4 LT	239
1da177e4 LT	240	struct l2cap_disconn_rsp {
8e036fc3 AV	241	__le16 dcid;
8e036fc3 AV	242	__le16 scid;
66c853cc	243	} __packed;
1da177e4 LT	244
1da177e4 LT	245	struct l2cap_info_req {
8e036fc3	246	__le16 type;
66c853cc	247	} __packed;
1da177e4 LT	248
1da177e4 LT	249	struct l2cap_info_rsp {
8e036fc3 AV	250	__le16 type;
8e036fc3 AV	251	__le16 result;
1da177e4	252	__u8 data[0];
66c853cc	253	} __packed;
1da177e4 LT	254
	255	/* info type */
	256	#define L2CAP_IT_CL_MTU 0x0001
	257	#define L2CAP_IT_FEAT_MASK 0x0002
e1027a7c	258	#define L2CAP_IT_FIXED_CHAN 0x0003
1da177e4 LT	259
	260	/* info result */
	261	#define L2CAP_IR_SUCCESS 0x0000
	262	#define L2CAP_IR_NOTSUPP 0x0001
	263
de73115a CT	264	struct l2cap_conn_param_update_req {
	265	__le16 min;
	266	__le16 max;
	267	__le16 latency;
	268	__le16 to_multiplier;
	269	} __packed;
	270
	271	struct l2cap_conn_param_update_rsp {
	272	__le16 result;
	273	} __packed;
	274
	275	/* Connection Parameters result */
	276	#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
	277	#define L2CAP_CONN_PARAM_REJECTED 0x0001
	278
48454079	279	/* ----- L2CAP channels and connections ----- */
39d5a3ee GP	280	struct srej_list {
	281	__u8 tx_seq;
	282	struct list_head list;
	283	};
	284
48454079 GP	285	struct l2cap_chan {
48454079 GP	286	struct sock *sk;
8c1d787b GP	287
	288	struct l2cap_conn *conn;
	289
89bc500e GP	290	__u8 state;
89bc500e GP	291
fe4128e0 GP	292	__le16 psm;
	293	__u16 dcid;
	294	__u16 scid;
4343478f	295
0c1bc5c6 GP	296	__u16 imtu;
	297	__u16 omtu;
	298	__u16 flush_to;
	299	__u8 mode;
715ec005	300	__u8 chan_type;
0c1bc5c6 GP	301
	302	__le16 sport;
	303
4343478f GP	304	__u8 sec_level;
	305	__u8 role_switch;
	306	__u8 force_reliable;
	307	__u8 flushable;
14b12d0b	308	__u8 force_active;
4343478f	309
fc7f8a7e GP	310	__u8 ident;
fc7f8a7e GP	311
73ffa904 GP	312	__u8 conf_req[64];
	313	__u8 conf_len;
	314	__u8 num_conf_req;
	315	__u8 num_conf_rsp;
	316
47d1ec61 GP	317	__u8 fcs;
	318
	319	__u8 tx_win;
	320	__u8 max_tx;
	321	__u16 retrans_timeout;
	322	__u16 monitor_timeout;
	323	__u16 mps;
	324
b4450035	325	__u8 conf_state;
525cd185 GP	326	__u16 conn_state;
525cd185 GP	327
42e5c802 GP	328	__u8 next_tx_seq;
	329	__u8 expected_ack_seq;
	330	__u8 expected_tx_seq;
	331	__u8 buffer_seq;
	332	__u8 buffer_seq_srej;
6a026610 GP	333	__u8 srej_save_reqseq;
	334	__u8 frames_sent;
	335	__u8 unacked_frames;
	336	__u8 retry_count;
	337	__u8 num_acked;
6f61fd47 GP	338	__u16 sdu_len;
	339	__u16 partial_sdu_len;
	340	struct sk_buff *sdu;
	341
2c03a7a4 GP	342	__u8 remote_tx_win;
	343	__u8 remote_max_tx;
	344	__u16 remote_mps;
42e5c802	345
ab07801d	346	struct timer_list chan_timer;
e92c8e70 GP	347	struct timer_list retrans_timer;
	348	struct timer_list monitor_timer;
	349	struct timer_list ack_timer;
58d35f87 GP	350	struct sk_buff *tx_send_head;
58d35f87 GP	351	struct sk_buff_head tx_q;
f1c6775b GP	352	struct sk_buff_head srej_q;
f1c6775b GP	353	struct sk_buff_head busy_q;
311bb895	354	struct work_struct busy_work;
39d5a3ee	355	struct list_head srej_l;
e92c8e70	356
baa7e1fa	357	struct list_head list;
23691d75	358	struct list_head global_l;
80808e43 GP	359
	360	void *data;
	361	struct l2cap_ops *ops;
	362	};
	363
	364	struct l2cap_ops {
	365	char *name;
	366
	367	struct l2cap_chan (new_connection) (void *data);
23070494	368	int (recv) (void data, struct sk_buff *skb);
ba3bd0ee	369	void (close) (void data);
89bc500e	370	void (state_change) (void data, int state);
1da177e4 LT	371	};
	372
	373	struct l2cap_conn {
	374	struct hci_conn *hcon;
	375
	376	bdaddr_t *dst;
	377	bdaddr_t *src;
	378
	379	unsigned int mtu;
	380
4e8402a3 MH	381	__u32 feat_mask;
	382
	383	__u8 info_state;
	384	__u8 info_ident;
	385
	386	struct timer_list info_timer;
	387
1da177e4 LT	388	spinlock_t lock;
	389
	390	struct sk_buff *rx_skb;
	391	__u32 rx_len;
1da177e4 LT	392	__u8 tx_ident;
1da177e4 LT	393
2950f21a MH	394	__u8 disc_reason;
2950f21a MH	395
baa7e1fa GP	396	struct list_head chan_l;
baa7e1fa GP	397	rwlock_t chan_lock;
1da177e4 LT	398	};
1da177e4 LT	399
4e8402a3	400	#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
984947dc MH	401	#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
984947dc MH	402	#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
4e8402a3	403
715ec005 GP	404	#define L2CAP_CHAN_RAW 1
	405	#define L2CAP_CHAN_CONN_LESS 2
	406	#define L2CAP_CHAN_CONN_ORIENTED 3
	407
48454079	408	/* ----- L2CAP socket info ----- */
1da177e4 LT	409	#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
	410
	411	struct l2cap_pinfo {
	412	struct bt_sock bt;
48454079	413	struct l2cap_chan *chan;
1da177e4 LT	414	};
1da177e4 LT	415
f2fcfcd6 GP	416	#define L2CAP_CONF_REQ_SENT 0x01
	417	#define L2CAP_CONF_INPUT_DONE 0x02
	418	#define L2CAP_CONF_OUTPUT_DONE 0x04
	419	#define L2CAP_CONF_MTU_DONE 0x08
	420	#define L2CAP_CONF_MODE_DONE 0x10
	421	#define L2CAP_CONF_CONNECT_PEND 0x20
fcc203c3	422	#define L2CAP_CONF_NO_FCS_RECV 0x40
f2fcfcd6 GP	423	#define L2CAP_CONF_STATE2_DEVICE 0x80
	424
	425	#define L2CAP_CONF_MAX_CONF_REQ 2
	426	#define L2CAP_CONF_MAX_CONF_RSP 2
861d6882	427
d5392c8f GP	428	#define L2CAP_CONN_SAR_SDU 0x0001
	429	#define L2CAP_CONN_SREJ_SENT 0x0002
	430	#define L2CAP_CONN_WAIT_F 0x0004
	431	#define L2CAP_CONN_SREJ_ACT 0x0008
	432	#define L2CAP_CONN_SEND_PBIT 0x0010
	433	#define L2CAP_CONN_REMOTE_BUSY 0x0020
	434	#define L2CAP_CONN_LOCAL_BUSY 0x0040
	435	#define L2CAP_CONN_REJ_ACT 0x0080
	436	#define L2CAP_CONN_SEND_FBIT 0x0100
1890d36b GP	437	#define L2CAP_CONN_RNR_SENT 0x0200
1890d36b GP	438	#define L2CAP_CONN_SAR_RETRY 0x0400
e90bac06	439
e92c8e70	440	#define __mod_retrans_timer() mod_timer(&chan->retrans_timer, \
e90bac06	441	jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
e92c8e70	442	#define __mod_monitor_timer() mod_timer(&chan->monitor_timer, \
e90bac06	443	jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
e92c8e70	444	#define __mod_ack_timer() mod_timer(&chan->ack_timer, \
c1b4f43b	445	jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
c74e560c	446
42e5c802	447	static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
1c2acffb	448	{
1c2acffb GP	449	int sub;
1c2acffb GP	450
42e5c802	451	sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
1c2acffb GP	452
	453	if (sub < 0)
	454	sub += 64;
	455
2c03a7a4	456	return sub == ch->remote_tx_win;
1c2acffb GP	457	}
1c2acffb GP	458
894718a6 AE	459	#define __get_txseq(ctrl) (((ctrl) & L2CAP_CTRL_TXSEQ) >> 1)
	460	#define __get_reqseq(ctrl) (((ctrl) & L2CAP_CTRL_REQSEQ) >> 8)
	461	#define __is_iframe(ctrl) (!((ctrl) & L2CAP_CTRL_FRAME_TYPE))
	462	#define __is_sframe(ctrl) ((ctrl) & L2CAP_CTRL_FRAME_TYPE)
	463	#define __is_sar_start(ctrl) (((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START)
1da177e4	464
bb58f747	465	extern int disable_ertm;
bb58f747 GP	466
	467	int l2cap_init_sockets(void);
	468	void l2cap_cleanup_sockets(void);
	469
8c1d787b	470	void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
dcba0dba	471	int __l2cap_wait_ack(struct sock *sk);
68983259	472
9e4425ff GP	473	int l2cap_add_psm(struct l2cap_chan chan, bdaddr_t src, __le16 psm);
	474	int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
	475
23691d75	476	struct l2cap_chan l2cap_chan_create(struct sock sk);
0f852724	477	void l2cap_chan_close(struct l2cap_chan *chan, int reason);
23691d75	478	void l2cap_chan_destroy(struct l2cap_chan *chan);
77a74c7e	479	int l2cap_chan_connect(struct l2cap_chan *chan);
9a91a04a	480	int l2cap_chan_send(struct l2cap_chan chan, struct msghdr msg, size_t len);
bb58f747	481
1da177e4	482	#endif /* __L2CAP_H */