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