[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 extended feature mask */
#define L2CAP_FEAT_FLOWCTL	0x00000001
#define L2CAP_FEAT_RETRANS	0x00000002
#define L2CAP_FEAT_BIDIR_QOS	0x00000004
#define L2CAP_FEAT_ERTM		0x00000008
#define L2CAP_FEAT_STREAMING	0x00000010
#define L2CAP_FEAT_FCS		0x00000020
#define L2CAP_FEAT_EXT_FLOW	0x00000040
#define L2CAP_FEAT_FIXED_CHAN	0x00000080
#define L2CAP_FEAT_EXT_WINDOW	0x00000100
#define L2CAP_FEAT_UCD		0x00000200

/* 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		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;
	unsigned long	flags;

	__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,
};

/* Definitions for flags in l2cap_chan */
enum {
	FLAG_ROLE_SWITCH,
	FLAG_FORCE_ACTIVE,
	FLAG_FORCE_RELIABLE,
	FLAG_FLUSHABLE,
};

#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	93
a858393b	94	/* L2CAP extended feature mask */
47ec1dcd MH	95	#define L2CAP_FEAT_FLOWCTL 0x00000001
47ec1dcd MH	96	#define L2CAP_FEAT_RETRANS 0x00000002
a858393b	97	#define L2CAP_FEAT_BIDIR_QOS 0x00000004
47ec1dcd MH	98	#define L2CAP_FEAT_ERTM 0x00000008
	99	#define L2CAP_FEAT_STREAMING 0x00000010
	100	#define L2CAP_FEAT_FCS 0x00000020
a858393b	101	#define L2CAP_FEAT_EXT_FLOW 0x00000040
47ec1dcd	102	#define L2CAP_FEAT_FIXED_CHAN 0x00000080
a858393b AE	103	#define L2CAP_FEAT_EXT_WINDOW 0x00000100
a858393b AE	104	#define L2CAP_FEAT_UCD 0x00000200
47ec1dcd MH	105
	106	/* L2CAP checksum option */
	107	#define L2CAP_FCS_NONE 0x00
	108	#define L2CAP_FCS_CRC16 0x01
1da177e4	109
1c2acffb GP	110	/* L2CAP Control Field bit masks */
	111	#define L2CAP_CTRL_SAR 0xC000
	112	#define L2CAP_CTRL_REQSEQ 0x3F00
	113	#define L2CAP_CTRL_TXSEQ 0x007E
	114	#define L2CAP_CTRL_RETRANS 0x0080
	115	#define L2CAP_CTRL_FINAL 0x0080
	116	#define L2CAP_CTRL_POLL 0x0010
	117	#define L2CAP_CTRL_SUPERVISE 0x000C
	118	#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
	119
	120	#define L2CAP_CTRL_TXSEQ_SHIFT 1
	121	#define L2CAP_CTRL_REQSEQ_SHIFT 8
8f17154f	122	#define L2CAP_CTRL_SAR_SHIFT 14
1c2acffb GP	123
	124	/* L2CAP Supervisory Function */
	125	#define L2CAP_SUPER_RCV_READY 0x0000
	126	#define L2CAP_SUPER_REJECT 0x0004
	127	#define L2CAP_SUPER_RCV_NOT_READY 0x0008
	128	#define L2CAP_SUPER_SELECT_REJECT 0x000C
	129
	130	/* L2CAP Segmentation and Reassembly */
	131	#define L2CAP_SDU_UNSEGMENTED 0x0000
	132	#define L2CAP_SDU_START 0x4000
	133	#define L2CAP_SDU_END 0x8000
	134	#define L2CAP_SDU_CONTINUE 0xC000
	135
e2fd318e IK	136	/* L2CAP Command rej. reasons */
	137	#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
	138	#define L2CAP_REJ_MTU_EXCEEDED 0x0001
	139	#define L2CAP_REJ_INVALID_CID 0x0002
	140
	141
1da177e4 LT	142	/* L2CAP structures */
1da177e4 LT	143	struct l2cap_hdr {
8e036fc3 AV	144	__le16 len;
8e036fc3 AV	145	__le16 cid;
66c853cc	146	} __packed;
1da177e4 LT	147	#define L2CAP_HDR_SIZE 4
	148
	149	struct l2cap_cmd_hdr {
	150	__u8 code;
	151	__u8 ident;
8e036fc3	152	__le16 len;
66c853cc	153	} __packed;
1da177e4 LT	154	#define L2CAP_CMD_HDR_SIZE 4
1da177e4 LT	155
e2fd318e IK	156	struct l2cap_cmd_rej_unk {
	157	__le16 reason;
	158	} __packed;
	159
	160	struct l2cap_cmd_rej_mtu {
8e036fc3	161	__le16 reason;
e2fd318e IK	162	__le16 max_mtu;
	163	} __packed;
	164
	165	struct l2cap_cmd_rej_cid {
	166	__le16 reason;
	167	__le16 scid;
	168	__le16 dcid;
66c853cc	169	} __packed;
1da177e4 LT	170
1da177e4 LT	171	struct l2cap_conn_req {
8e036fc3 AV	172	__le16 psm;
8e036fc3 AV	173	__le16 scid;
66c853cc	174	} __packed;
1da177e4 LT	175
1da177e4 LT	176	struct l2cap_conn_rsp {
8e036fc3 AV	177	__le16 dcid;
	178	__le16 scid;
	179	__le16 result;
	180	__le16 status;
66c853cc	181	} __packed;
1da177e4	182
8db4dc46 GP	183	/* channel indentifier */
	184	#define L2CAP_CID_SIGNALING 0x0001
	185	#define L2CAP_CID_CONN_LESS 0x0002
acd7d370 VT	186	#define L2CAP_CID_LE_DATA 0x0004
	187	#define L2CAP_CID_LE_SIGNALING 0x0005
	188	#define L2CAP_CID_SMP 0x0006
8db4dc46 GP	189	#define L2CAP_CID_DYN_START 0x0040
	190	#define L2CAP_CID_DYN_END 0xffff
	191
1da177e4	192	/* connect result */
47ec1dcd MH	193	#define L2CAP_CR_SUCCESS 0x0000
	194	#define L2CAP_CR_PEND 0x0001
	195	#define L2CAP_CR_BAD_PSM 0x0002
	196	#define L2CAP_CR_SEC_BLOCK 0x0003
	197	#define L2CAP_CR_NO_MEM 0x0004
1da177e4 LT	198
1da177e4 LT	199	/* connect status */
47ec1dcd MH	200	#define L2CAP_CS_NO_INFO 0x0000
	201	#define L2CAP_CS_AUTHEN_PEND 0x0001
	202	#define L2CAP_CS_AUTHOR_PEND 0x0002
1da177e4 LT	203
1da177e4 LT	204	struct l2cap_conf_req {
8e036fc3 AV	205	__le16 dcid;
8e036fc3 AV	206	__le16 flags;
1da177e4	207	__u8 data[0];
66c853cc	208	} __packed;
1da177e4 LT	209
1da177e4 LT	210	struct l2cap_conf_rsp {
8e036fc3 AV	211	__le16 scid;
	212	__le16 flags;
	213	__le16 result;
1da177e4	214	__u8 data[0];
66c853cc	215	} __packed;
1da177e4	216
5dee9e7c MH	217	#define L2CAP_CONF_SUCCESS 0x0000
	218	#define L2CAP_CONF_UNACCEPT 0x0001
	219	#define L2CAP_CONF_REJECT 0x0002
	220	#define L2CAP_CONF_UNKNOWN 0x0003
1da177e4 LT	221
	222	struct l2cap_conf_opt {
	223	__u8 type;
	224	__u8 len;
	225	__u8 val[0];
66c853cc	226	} __packed;
1da177e4 LT	227	#define L2CAP_CONF_OPT_SIZE 2
1da177e4 LT	228
589d2746	229	#define L2CAP_CONF_HINT 0x80
47ec1dcd	230	#define L2CAP_CONF_MASK 0x7f
589d2746	231
1da177e4 LT	232	#define L2CAP_CONF_MTU 0x01
	233	#define L2CAP_CONF_FLUSH_TO 0x02
	234	#define L2CAP_CONF_QOS 0x03
	235	#define L2CAP_CONF_RFC 0x04
47ec1dcd	236	#define L2CAP_CONF_FCS 0x05
1da177e4 LT	237
	238	#define L2CAP_CONF_MAX_SIZE 22
	239
6464f35f MH	240	struct l2cap_conf_rfc {
	241	__u8 mode;
	242	__u8 txwin_size;
	243	__u8 max_transmit;
	244	__le16 retrans_timeout;
	245	__le16 monitor_timeout;
	246	__le16 max_pdu_size;
66c853cc	247	} __packed;
6464f35f MH	248
	249	#define L2CAP_MODE_BASIC 0x00
	250	#define L2CAP_MODE_RETRANS 0x01
	251	#define L2CAP_MODE_FLOWCTL 0x02
47ec1dcd	252	#define L2CAP_MODE_ERTM 0x03
c6b03cf9	253	#define L2CAP_MODE_STREAMING 0x04
6464f35f	254
1da177e4	255	struct l2cap_disconn_req {
8e036fc3 AV	256	__le16 dcid;
8e036fc3 AV	257	__le16 scid;
66c853cc	258	} __packed;
1da177e4 LT	259
1da177e4 LT	260	struct l2cap_disconn_rsp {
8e036fc3 AV	261	__le16 dcid;
8e036fc3 AV	262	__le16 scid;
66c853cc	263	} __packed;
1da177e4 LT	264
1da177e4 LT	265	struct l2cap_info_req {
8e036fc3	266	__le16 type;
66c853cc	267	} __packed;
1da177e4 LT	268
1da177e4 LT	269	struct l2cap_info_rsp {
8e036fc3 AV	270	__le16 type;
8e036fc3 AV	271	__le16 result;
1da177e4	272	__u8 data[0];
66c853cc	273	} __packed;
1da177e4 LT	274
	275	/* info type */
	276	#define L2CAP_IT_CL_MTU 0x0001
	277	#define L2CAP_IT_FEAT_MASK 0x0002
e1027a7c	278	#define L2CAP_IT_FIXED_CHAN 0x0003
1da177e4 LT	279
	280	/* info result */
	281	#define L2CAP_IR_SUCCESS 0x0000
	282	#define L2CAP_IR_NOTSUPP 0x0001
	283
de73115a CT	284	struct l2cap_conn_param_update_req {
	285	__le16 min;
	286	__le16 max;
	287	__le16 latency;
	288	__le16 to_multiplier;
	289	} __packed;
	290
	291	struct l2cap_conn_param_update_rsp {
	292	__le16 result;
	293	} __packed;
	294
	295	/* Connection Parameters result */
	296	#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
	297	#define L2CAP_CONN_PARAM_REJECTED 0x0001
	298
48454079	299	/* ----- L2CAP channels and connections ----- */
39d5a3ee GP	300	struct srej_list {
	301	__u8 tx_seq;
	302	struct list_head list;
	303	};
	304
48454079 GP	305	struct l2cap_chan {
48454079 GP	306	struct sock *sk;
8c1d787b GP	307
	308	struct l2cap_conn *conn;
	309
89bc500e GP	310	__u8 state;
89bc500e GP	311
71ba0e56 GP	312	atomic_t refcnt;
71ba0e56 GP	313
fe4128e0 GP	314	__le16 psm;
	315	__u16 dcid;
	316	__u16 scid;
4343478f	317
0c1bc5c6 GP	318	__u16 imtu;
	319	__u16 omtu;
	320	__u16 flush_to;
	321	__u8 mode;
715ec005	322	__u8 chan_type;
0c1bc5c6 GP	323
	324	__le16 sport;
	325
4343478f	326	__u8 sec_level;
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;
d57b0e8b	345	unsigned long flags;
525cd185	346
42e5c802 GP	347	__u8 next_tx_seq;
	348	__u8 expected_ack_seq;
	349	__u8 expected_tx_seq;
	350	__u8 buffer_seq;
	351	__u8 buffer_seq_srej;
6a026610 GP	352	__u8 srej_save_reqseq;
	353	__u8 frames_sent;
	354	__u8 unacked_frames;
	355	__u8 retry_count;
	356	__u8 num_acked;
6f61fd47	357	__u16 sdu_len;
6f61fd47	358	struct sk_buff *sdu;
84084a31	359	struct sk_buff *sdu_last_frag;
6f61fd47	360
2c03a7a4 GP	361	__u8 remote_tx_win;
	362	__u8 remote_max_tx;
	363	__u16 remote_mps;
42e5c802	364
ab07801d	365	struct timer_list chan_timer;
e92c8e70 GP	366	struct timer_list retrans_timer;
	367	struct timer_list monitor_timer;
	368	struct timer_list ack_timer;
58d35f87 GP	369	struct sk_buff *tx_send_head;
58d35f87 GP	370	struct sk_buff_head tx_q;
f1c6775b	371	struct sk_buff_head srej_q;
39d5a3ee	372	struct list_head srej_l;
e92c8e70	373
baa7e1fa	374	struct list_head list;
23691d75	375	struct list_head global_l;
80808e43 GP	376
	377	void *data;
	378	struct l2cap_ops *ops;
	379	};
	380
	381	struct l2cap_ops {
	382	char *name;
	383
	384	struct l2cap_chan (new_connection) (void *data);
23070494	385	int (recv) (void data, struct sk_buff *skb);
ba3bd0ee	386	void (close) (void data);
89bc500e	387	void (state_change) (void data, int state);
1da177e4 LT	388	};
	389
	390	struct l2cap_conn {
	391	struct hci_conn *hcon;
	392
	393	bdaddr_t *dst;
	394	bdaddr_t *src;
	395
	396	unsigned int mtu;
	397
4e8402a3 MH	398	__u32 feat_mask;
	399
	400	__u8 info_state;
	401	__u8 info_ident;
	402
	403	struct timer_list info_timer;
	404
1da177e4 LT	405	spinlock_t lock;
	406
	407	struct sk_buff *rx_skb;
	408	__u32 rx_len;
1da177e4 LT	409	__u8 tx_ident;
1da177e4 LT	410
2950f21a MH	411	__u8 disc_reason;
2950f21a MH	412
5d3de7df	413	struct timer_list security_timer;
1c1def09	414	struct smp_chan *smp_chan;
5d3de7df	415
baa7e1fa GP	416	struct list_head chan_l;
baa7e1fa GP	417	rwlock_t chan_lock;
1da177e4 LT	418	};
1da177e4 LT	419
4e8402a3	420	#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
984947dc MH	421	#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
984947dc MH	422	#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
4e8402a3	423
715ec005 GP	424	#define L2CAP_CHAN_RAW 1
	425	#define L2CAP_CHAN_CONN_LESS 2
	426	#define L2CAP_CHAN_CONN_ORIENTED 3
	427
48454079	428	/* ----- L2CAP socket info ----- */
1da177e4 LT	429	#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
	430
	431	struct l2cap_pinfo {
	432	struct bt_sock bt;
48454079	433	struct l2cap_chan *chan;
e328140f	434	struct sk_buff *rx_busy_skb;
1da177e4 LT	435	};
1da177e4 LT	436
c1360a1c GP	437	enum {
	438	CONF_REQ_SENT,
	439	CONF_INPUT_DONE,
	440	CONF_OUTPUT_DONE,
	441	CONF_MTU_DONE,
	442	CONF_MODE_DONE,
	443	CONF_CONNECT_PEND,
	444	CONF_NO_FCS_RECV,
	445	CONF_STATE2_DEVICE,
	446	};
f2fcfcd6 GP	447
	448	#define L2CAP_CONF_MAX_CONF_REQ 2
	449	#define L2CAP_CONF_MAX_CONF_RSP 2
861d6882	450
e2ab4353	451	enum {
e2ab4353 GP	452	CONN_SREJ_SENT,
	453	CONN_WAIT_F,
	454	CONN_SREJ_ACT,
	455	CONN_SEND_PBIT,
	456	CONN_REMOTE_BUSY,
	457	CONN_LOCAL_BUSY,
	458	CONN_REJ_ACT,
	459	CONN_SEND_FBIT,
	460	CONN_RNR_SENT,
e2ab4353	461	};
e90bac06	462
d57b0e8b AE	463	/* Definitions for flags in l2cap_chan */
d57b0e8b AE	464	enum {
43bd0f32	465	FLAG_ROLE_SWITCH,
15770b1a	466	FLAG_FORCE_ACTIVE,
ecf61bdb	467	FLAG_FORCE_RELIABLE,
d57b0e8b AE	468	FLAG_FLUSHABLE,
	469	};
	470
c9b66675 GP	471	#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
c9b66675 GP	472	#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
1a09bcb9 GP	473	#define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
	474	L2CAP_DEFAULT_RETRANS_TO);
	475	#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
	476	#define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
	477	L2CAP_DEFAULT_MONITOR_TO);
	478	#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
	479	#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
	480	L2CAP_DEFAULT_ACK_TO);
	481	#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
c74e560c	482
42e5c802	483	static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
1c2acffb	484	{
1c2acffb GP	485	int sub;
1c2acffb GP	486
42e5c802	487	sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
1c2acffb GP	488
	489	if (sub < 0)
	490	sub += 64;
	491
2c03a7a4	492	return sub == ch->remote_tx_win;
1c2acffb GP	493	}
1c2acffb GP	494
894718a6 AE	495	#define __get_txseq(ctrl) (((ctrl) & L2CAP_CTRL_TXSEQ) >> 1)
	496	#define __get_reqseq(ctrl) (((ctrl) & L2CAP_CTRL_REQSEQ) >> 8)
	497	#define __is_iframe(ctrl) (!((ctrl) & L2CAP_CTRL_FRAME_TYPE))
	498	#define __is_sframe(ctrl) ((ctrl) & L2CAP_CTRL_FRAME_TYPE)
	499	#define __is_sar_start(ctrl) (((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START)
1da177e4	500
bb58f747	501	extern int disable_ertm;
bb58f747 GP	502
	503	int l2cap_init_sockets(void);
	504	void l2cap_cleanup_sockets(void);
	505
8c1d787b	506	void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
dcba0dba	507	int __l2cap_wait_ack(struct sock *sk);
68983259	508
9e4425ff GP	509	int l2cap_add_psm(struct l2cap_chan chan, bdaddr_t src, __le16 psm);
	510	int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
	511
23691d75	512	struct l2cap_chan l2cap_chan_create(struct sock sk);
0f852724	513	void l2cap_chan_close(struct l2cap_chan *chan, int reason);
23691d75	514	void l2cap_chan_destroy(struct l2cap_chan *chan);
77a74c7e	515	int l2cap_chan_connect(struct l2cap_chan *chan);
9a91a04a	516	int l2cap_chan_send(struct l2cap_chan chan, struct msghdr msg, size_t len);
e328140f	517	void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
bb58f747	518
1da177e4	519	#endif /* __L2CAP_H */