[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_EXT_WINDOW	0x3FFF
#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_SUPERVISE		0x000C

#define L2CAP_CTRL_RETRANS		0x0080
#define L2CAP_CTRL_FINAL		0x0080
#define L2CAP_CTRL_POLL			0x0010
#define L2CAP_CTRL_FRAME_TYPE		0x0001 /* I- or S-Frame */

#define L2CAP_CTRL_TXSEQ_SHIFT		1
#define L2CAP_CTRL_SUPER_SHIFT		2
#define L2CAP_CTRL_REQSEQ_SHIFT		8
#define L2CAP_CTRL_SAR_SHIFT		14

/* L2CAP Extended Control Field bit mask */
#define L2CAP_EXT_CTRL_TXSEQ		0xFFFC0000
#define L2CAP_EXT_CTRL_SAR		0x00030000
#define L2CAP_EXT_CTRL_SUPERVISE	0x00030000
#define L2CAP_EXT_CTRL_REQSEQ		0x0000FFFC

#define L2CAP_EXT_CTRL_POLL		0x00040000
#define L2CAP_EXT_CTRL_FINAL		0x00000002
#define L2CAP_EXT_CTRL_FRAME_TYPE	0x00000001 /* I- or S-Frame */

#define L2CAP_EXT_CTRL_REQSEQ_SHIFT	2
#define L2CAP_EXT_CTRL_SAR_SHIFT	16
#define L2CAP_EXT_CTRL_SUPER_SHIFT	16
#define L2CAP_EXT_CTRL_TXSEQ_SHIFT	18

/* L2CAP Supervisory Function */
#define L2CAP_SUPER_RR		0x00
#define L2CAP_SUPER_REJ		0x01
#define L2CAP_SUPER_RNR		0x02
#define L2CAP_SUPER_SREJ	0x03

/* L2CAP Segmentation and Reassembly */
#define L2CAP_SAR_UNSEGMENTED	0x00
#define L2CAP_SAR_START		0x01
#define L2CAP_SAR_END		0x02
#define L2CAP_SAR_CONTINUE	0x03

/* 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_EWS		0x07

#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;

	__u16		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;

	__u16		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,
	CONF_EWS_RECV,
};

#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,
	FLAG_EXT_CTRL,
};

#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)
static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
{
	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
	else
		return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
}

static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
{
	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
	else
		return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
}

static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
{
	return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
}

static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
{
	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		return L2CAP_EXT_CTRL_SAR;
	else
		return L2CAP_CTRL_SAR;
}

static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
{
	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
						L2CAP_EXT_CTRL_SUPER_SHIFT;
	else
		return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
}

static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
{
	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
						L2CAP_EXT_CTRL_SUPERVISE;
	else
		return (super << L2CAP_CTRL_SUPER_SHIFT) &
							L2CAP_CTRL_SUPERVISE;
}

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
6327eb98	35	#define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
e90bac06	36	#define L2CAP_DEFAULT_MAX_TX 3
fa235562	37	#define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */
e90bac06	38	#define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
db12d647	39	#define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */
c1b4f43b	40	#define L2CAP_DEFAULT_ACK_TO 200
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	94
a858393b	95	/* L2CAP extended feature mask */
47ec1dcd MH	96	#define L2CAP_FEAT_FLOWCTL 0x00000001
47ec1dcd MH	97	#define L2CAP_FEAT_RETRANS 0x00000002
a858393b	98	#define L2CAP_FEAT_BIDIR_QOS 0x00000004
47ec1dcd MH	99	#define L2CAP_FEAT_ERTM 0x00000008
	100	#define L2CAP_FEAT_STREAMING 0x00000010
	101	#define L2CAP_FEAT_FCS 0x00000020
a858393b	102	#define L2CAP_FEAT_EXT_FLOW 0x00000040
47ec1dcd	103	#define L2CAP_FEAT_FIXED_CHAN 0x00000080
a858393b AE	104	#define L2CAP_FEAT_EXT_WINDOW 0x00000100
a858393b AE	105	#define L2CAP_FEAT_UCD 0x00000200
47ec1dcd MH	106
	107	/* L2CAP checksum option */
	108	#define L2CAP_FCS_NONE 0x00
	109	#define L2CAP_FCS_CRC16 0x01
1da177e4	110
1c2acffb	111	/* L2CAP Control Field bit masks */
57253fd8 AE	112	#define L2CAP_CTRL_SAR 0xC000
	113	#define L2CAP_CTRL_REQSEQ 0x3F00
	114	#define L2CAP_CTRL_TXSEQ 0x007E
	115	#define L2CAP_CTRL_SUPERVISE 0x000C
	116
	117	#define L2CAP_CTRL_RETRANS 0x0080
	118	#define L2CAP_CTRL_FINAL 0x0080
	119	#define L2CAP_CTRL_POLL 0x0010
	120	#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
	121
	122	#define L2CAP_CTRL_TXSEQ_SHIFT 1
	123	#define L2CAP_CTRL_SUPER_SHIFT 2
	124	#define L2CAP_CTRL_REQSEQ_SHIFT 8
	125	#define L2CAP_CTRL_SAR_SHIFT 14
	126
	127	/* L2CAP Extended Control Field bit mask */
	128	#define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
	129	#define L2CAP_EXT_CTRL_SAR 0x00030000
	130	#define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
	131	#define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
	132
	133	#define L2CAP_EXT_CTRL_POLL 0x00040000
	134	#define L2CAP_EXT_CTRL_FINAL 0x00000002
	135	#define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
	136
	137	#define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
	138	#define L2CAP_EXT_CTRL_SAR_SHIFT 16
	139	#define L2CAP_EXT_CTRL_SUPER_SHIFT 16
	140	#define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
1c2acffb GP	141
1c2acffb GP	142	/* L2CAP Supervisory Function */
ab784b73 AE	143	#define L2CAP_SUPER_RR 0x00
	144	#define L2CAP_SUPER_REJ 0x01
	145	#define L2CAP_SUPER_RNR 0x02
	146	#define L2CAP_SUPER_SREJ 0x03
1c2acffb GP	147
1c2acffb GP	148	/* L2CAP Segmentation and Reassembly */
7e0ef6ee AE	149	#define L2CAP_SAR_UNSEGMENTED 0x00
	150	#define L2CAP_SAR_START 0x01
	151	#define L2CAP_SAR_END 0x02
	152	#define L2CAP_SAR_CONTINUE 0x03
1c2acffb	153
e2fd318e	154	/* L2CAP Command rej. reasons */
8d6765aa AE	155	#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
	156	#define L2CAP_REJ_MTU_EXCEEDED 0x0001
	157	#define L2CAP_REJ_INVALID_CID 0x0002
e2fd318e	158
1da177e4 LT	159	/* L2CAP structures */
1da177e4 LT	160	struct l2cap_hdr {
8e036fc3 AV	161	__le16 len;
8e036fc3 AV	162	__le16 cid;
66c853cc	163	} __packed;
1da177e4 LT	164	#define L2CAP_HDR_SIZE 4
	165
	166	struct l2cap_cmd_hdr {
	167	__u8 code;
	168	__u8 ident;
8e036fc3	169	__le16 len;
66c853cc	170	} __packed;
1da177e4 LT	171	#define L2CAP_CMD_HDR_SIZE 4
1da177e4 LT	172
e2fd318e IK	173	struct l2cap_cmd_rej_unk {
	174	__le16 reason;
	175	} __packed;
	176
	177	struct l2cap_cmd_rej_mtu {
8e036fc3	178	__le16 reason;
e2fd318e IK	179	__le16 max_mtu;
	180	} __packed;
	181
	182	struct l2cap_cmd_rej_cid {
	183	__le16 reason;
	184	__le16 scid;
	185	__le16 dcid;
66c853cc	186	} __packed;
1da177e4 LT	187
1da177e4 LT	188	struct l2cap_conn_req {
8e036fc3 AV	189	__le16 psm;
8e036fc3 AV	190	__le16 scid;
66c853cc	191	} __packed;
1da177e4 LT	192
1da177e4 LT	193	struct l2cap_conn_rsp {
8e036fc3 AV	194	__le16 dcid;
	195	__le16 scid;
	196	__le16 result;
	197	__le16 status;
66c853cc	198	} __packed;
1da177e4	199
8db4dc46 GP	200	/* channel indentifier */
	201	#define L2CAP_CID_SIGNALING 0x0001
	202	#define L2CAP_CID_CONN_LESS 0x0002
acd7d370 VT	203	#define L2CAP_CID_LE_DATA 0x0004
	204	#define L2CAP_CID_LE_SIGNALING 0x0005
	205	#define L2CAP_CID_SMP 0x0006
8db4dc46 GP	206	#define L2CAP_CID_DYN_START 0x0040
	207	#define L2CAP_CID_DYN_END 0xffff
	208
1da177e4	209	/* connect result */
47ec1dcd MH	210	#define L2CAP_CR_SUCCESS 0x0000
	211	#define L2CAP_CR_PEND 0x0001
	212	#define L2CAP_CR_BAD_PSM 0x0002
	213	#define L2CAP_CR_SEC_BLOCK 0x0003
	214	#define L2CAP_CR_NO_MEM 0x0004
1da177e4 LT	215
1da177e4 LT	216	/* connect status */
47ec1dcd MH	217	#define L2CAP_CS_NO_INFO 0x0000
	218	#define L2CAP_CS_AUTHEN_PEND 0x0001
	219	#define L2CAP_CS_AUTHOR_PEND 0x0002
1da177e4 LT	220
1da177e4 LT	221	struct l2cap_conf_req {
8e036fc3 AV	222	__le16 dcid;
8e036fc3 AV	223	__le16 flags;
1da177e4	224	__u8 data[0];
66c853cc	225	} __packed;
1da177e4 LT	226
1da177e4 LT	227	struct l2cap_conf_rsp {
8e036fc3 AV	228	__le16 scid;
	229	__le16 flags;
	230	__le16 result;
1da177e4	231	__u8 data[0];
66c853cc	232	} __packed;
1da177e4	233
5dee9e7c MH	234	#define L2CAP_CONF_SUCCESS 0x0000
	235	#define L2CAP_CONF_UNACCEPT 0x0001
	236	#define L2CAP_CONF_REJECT 0x0002
	237	#define L2CAP_CONF_UNKNOWN 0x0003
1da177e4 LT	238
	239	struct l2cap_conf_opt {
	240	__u8 type;
	241	__u8 len;
	242	__u8 val[0];
66c853cc	243	} __packed;
1da177e4 LT	244	#define L2CAP_CONF_OPT_SIZE 2
1da177e4 LT	245
589d2746	246	#define L2CAP_CONF_HINT 0x80
47ec1dcd	247	#define L2CAP_CONF_MASK 0x7f
589d2746	248
1da177e4 LT	249	#define L2CAP_CONF_MTU 0x01
	250	#define L2CAP_CONF_FLUSH_TO 0x02
	251	#define L2CAP_CONF_QOS 0x03
	252	#define L2CAP_CONF_RFC 0x04
47ec1dcd	253	#define L2CAP_CONF_FCS 0x05
6327eb98	254	#define L2CAP_CONF_EWS 0x07
1da177e4 LT	255
	256	#define L2CAP_CONF_MAX_SIZE 22
	257
6464f35f MH	258	struct l2cap_conf_rfc {
	259	__u8 mode;
	260	__u8 txwin_size;
	261	__u8 max_transmit;
	262	__le16 retrans_timeout;
	263	__le16 monitor_timeout;
	264	__le16 max_pdu_size;
66c853cc	265	} __packed;
6464f35f MH	266
	267	#define L2CAP_MODE_BASIC 0x00
	268	#define L2CAP_MODE_RETRANS 0x01
	269	#define L2CAP_MODE_FLOWCTL 0x02
47ec1dcd	270	#define L2CAP_MODE_ERTM 0x03
c6b03cf9	271	#define L2CAP_MODE_STREAMING 0x04
6464f35f	272
1da177e4	273	struct l2cap_disconn_req {
8e036fc3 AV	274	__le16 dcid;
8e036fc3 AV	275	__le16 scid;
66c853cc	276	} __packed;
1da177e4 LT	277
1da177e4 LT	278	struct l2cap_disconn_rsp {
8e036fc3 AV	279	__le16 dcid;
8e036fc3 AV	280	__le16 scid;
66c853cc	281	} __packed;
1da177e4 LT	282
1da177e4 LT	283	struct l2cap_info_req {
8e036fc3	284	__le16 type;
66c853cc	285	} __packed;
1da177e4 LT	286
1da177e4 LT	287	struct l2cap_info_rsp {
8e036fc3 AV	288	__le16 type;
8e036fc3 AV	289	__le16 result;
1da177e4	290	__u8 data[0];
66c853cc	291	} __packed;
1da177e4 LT	292
1da177e4 LT	293	/* info type */
8d6765aa AE	294	#define L2CAP_IT_CL_MTU 0x0001
	295	#define L2CAP_IT_FEAT_MASK 0x0002
	296	#define L2CAP_IT_FIXED_CHAN 0x0003
1da177e4 LT	297
1da177e4 LT	298	/* info result */
8d6765aa AE	299	#define L2CAP_IR_SUCCESS 0x0000
8d6765aa AE	300	#define L2CAP_IR_NOTSUPP 0x0001
1da177e4	301
de73115a CT	302	struct l2cap_conn_param_update_req {
	303	__le16 min;
	304	__le16 max;
	305	__le16 latency;
	306	__le16 to_multiplier;
	307	} __packed;
	308
	309	struct l2cap_conn_param_update_rsp {
	310	__le16 result;
	311	} __packed;
	312
	313	/* Connection Parameters result */
	314	#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
	315	#define L2CAP_CONN_PARAM_REJECTED 0x0001
	316
48454079	317	/* ----- L2CAP channels and connections ----- */
39d5a3ee GP	318	struct srej_list {
	319	__u8 tx_seq;
	320	struct list_head list;
	321	};
	322
48454079 GP	323	struct l2cap_chan {
48454079 GP	324	struct sock *sk;
8c1d787b GP	325
	326	struct l2cap_conn *conn;
	327
89bc500e GP	328	__u8 state;
89bc500e GP	329
71ba0e56 GP	330	atomic_t refcnt;
71ba0e56 GP	331
fe4128e0 GP	332	__le16 psm;
	333	__u16 dcid;
	334	__u16 scid;
4343478f	335
0c1bc5c6 GP	336	__u16 imtu;
	337	__u16 omtu;
	338	__u16 flush_to;
	339	__u8 mode;
715ec005	340	__u8 chan_type;
0c1bc5c6 GP	341
	342	__le16 sport;
	343
4343478f	344	__u8 sec_level;
4343478f	345
fc7f8a7e GP	346	__u8 ident;
fc7f8a7e GP	347
73ffa904 GP	348	__u8 conf_req[64];
	349	__u8 conf_len;
	350	__u8 num_conf_req;
	351	__u8 num_conf_rsp;
	352
47d1ec61 GP	353	__u8 fcs;
47d1ec61 GP	354
6327eb98	355	__u16 tx_win;
47d1ec61 GP	356	__u8 max_tx;
	357	__u16 retrans_timeout;
	358	__u16 monitor_timeout;
	359	__u16 mps;
	360
c1360a1c	361	unsigned long conf_state;
e2ab4353	362	unsigned long conn_state;
d57b0e8b	363	unsigned long flags;
525cd185	364
42e5c802 GP	365	__u8 next_tx_seq;
	366	__u8 expected_ack_seq;
	367	__u8 expected_tx_seq;
	368	__u8 buffer_seq;
	369	__u8 buffer_seq_srej;
6a026610 GP	370	__u8 srej_save_reqseq;
	371	__u8 frames_sent;
	372	__u8 unacked_frames;
	373	__u8 retry_count;
	374	__u8 num_acked;
6f61fd47	375	__u16 sdu_len;
6f61fd47	376	struct sk_buff *sdu;
84084a31	377	struct sk_buff *sdu_last_frag;
6f61fd47	378
6327eb98	379	__u16 remote_tx_win;
2c03a7a4 GP	380	__u8 remote_max_tx;
2c03a7a4 GP	381	__u16 remote_mps;
42e5c802	382
ab07801d	383	struct timer_list chan_timer;
e92c8e70 GP	384	struct timer_list retrans_timer;
	385	struct timer_list monitor_timer;
	386	struct timer_list ack_timer;
58d35f87 GP	387	struct sk_buff *tx_send_head;
58d35f87 GP	388	struct sk_buff_head tx_q;
f1c6775b	389	struct sk_buff_head srej_q;
39d5a3ee	390	struct list_head srej_l;
e92c8e70	391
baa7e1fa	392	struct list_head list;
23691d75	393	struct list_head global_l;
80808e43 GP	394
	395	void *data;
	396	struct l2cap_ops *ops;
	397	};
	398
	399	struct l2cap_ops {
	400	char *name;
	401
	402	struct l2cap_chan (new_connection) (void *data);
23070494	403	int (recv) (void data, struct sk_buff *skb);
ba3bd0ee	404	void (close) (void data);
89bc500e	405	void (state_change) (void data, int state);
1da177e4 LT	406	};
	407
	408	struct l2cap_conn {
	409	struct hci_conn *hcon;
	410
	411	bdaddr_t *dst;
	412	bdaddr_t *src;
	413
	414	unsigned int mtu;
	415
4e8402a3 MH	416	__u32 feat_mask;
	417
	418	__u8 info_state;
	419	__u8 info_ident;
	420
	421	struct timer_list info_timer;
	422
1da177e4 LT	423	spinlock_t lock;
	424
	425	struct sk_buff *rx_skb;
	426	__u32 rx_len;
1da177e4 LT	427	__u8 tx_ident;
1da177e4 LT	428
2950f21a MH	429	__u8 disc_reason;
2950f21a MH	430
5d3de7df	431	struct timer_list security_timer;
1c1def09	432	struct smp_chan *smp_chan;
5d3de7df	433
baa7e1fa GP	434	struct list_head chan_l;
baa7e1fa GP	435	rwlock_t chan_lock;
1da177e4 LT	436	};
1da177e4 LT	437
4e8402a3	438	#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
984947dc MH	439	#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
984947dc MH	440	#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
4e8402a3	441
715ec005 GP	442	#define L2CAP_CHAN_RAW 1
	443	#define L2CAP_CHAN_CONN_LESS 2
	444	#define L2CAP_CHAN_CONN_ORIENTED 3
	445
48454079	446	/* ----- L2CAP socket info ----- */
1da177e4 LT	447	#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
	448
	449	struct l2cap_pinfo {
	450	struct bt_sock bt;
48454079	451	struct l2cap_chan *chan;
e328140f	452	struct sk_buff *rx_busy_skb;
1da177e4 LT	453	};
1da177e4 LT	454
c1360a1c GP	455	enum {
	456	CONF_REQ_SENT,
	457	CONF_INPUT_DONE,
	458	CONF_OUTPUT_DONE,
	459	CONF_MTU_DONE,
	460	CONF_MODE_DONE,
	461	CONF_CONNECT_PEND,
	462	CONF_NO_FCS_RECV,
	463	CONF_STATE2_DEVICE,
6327eb98	464	CONF_EWS_RECV,
c1360a1c	465	};
f2fcfcd6 GP	466
	467	#define L2CAP_CONF_MAX_CONF_REQ 2
	468	#define L2CAP_CONF_MAX_CONF_RSP 2
861d6882	469
e2ab4353	470	enum {
e2ab4353 GP	471	CONN_SREJ_SENT,
	472	CONN_WAIT_F,
	473	CONN_SREJ_ACT,
	474	CONN_SEND_PBIT,
	475	CONN_REMOTE_BUSY,
	476	CONN_LOCAL_BUSY,
	477	CONN_REJ_ACT,
	478	CONN_SEND_FBIT,
	479	CONN_RNR_SENT,
e2ab4353	480	};
e90bac06	481
d57b0e8b AE	482	/* Definitions for flags in l2cap_chan */
d57b0e8b AE	483	enum {
43bd0f32	484	FLAG_ROLE_SWITCH,
15770b1a	485	FLAG_FORCE_ACTIVE,
ecf61bdb	486	FLAG_FORCE_RELIABLE,
d57b0e8b	487	FLAG_FLUSHABLE,
6327eb98	488	FLAG_EXT_CTRL,
d57b0e8b AE	489	};
d57b0e8b AE	490
c9b66675 GP	491	#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
c9b66675 GP	492	#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
1a09bcb9 GP	493	#define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
	494	L2CAP_DEFAULT_RETRANS_TO);
	495	#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
	496	#define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
	497	L2CAP_DEFAULT_MONITOR_TO);
	498	#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
	499	#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
	500	L2CAP_DEFAULT_ACK_TO);
	501	#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
c74e560c	502
42e5c802	503	static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
1c2acffb	504	{
1c2acffb GP	505	int sub;
1c2acffb GP	506
42e5c802	507	sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
1c2acffb GP	508
	509	if (sub < 0)
	510	sub += 64;
	511
2c03a7a4	512	return sub == ch->remote_tx_win;
1c2acffb GP	513	}
1c2acffb GP	514
894718a6 AE	515	#define __get_txseq(ctrl) (((ctrl) & L2CAP_CTRL_TXSEQ) >> 1)
	516	#define __get_reqseq(ctrl) (((ctrl) & L2CAP_CTRL_REQSEQ) >> 8)
	517	#define __is_iframe(ctrl) (!((ctrl) & L2CAP_CTRL_FRAME_TYPE))
	518	#define __is_sframe(ctrl) ((ctrl) & L2CAP_CTRL_FRAME_TYPE)
7e0ef6ee AE	519	static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
	520	{
	521	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
	522	return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
	523	else
	524	return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
	525	}
	526
	527	static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
	528	{
	529	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
	530	return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
	531	else
	532	return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
	533	}
	534
	535	static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
	536	{
	537	return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
	538	}
	539
	540	static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
	541	{
	542	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
	543	return L2CAP_EXT_CTRL_SAR;
	544	else
	545	return L2CAP_CTRL_SAR;
	546	}
1da177e4	547
ab784b73 AE	548	static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
	549	{
	550	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
	551	return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
	552	L2CAP_EXT_CTRL_SUPER_SHIFT;
	553	else
	554	return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
	555	}
	556
	557	static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
	558	{
	559	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
	560	return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
	561	L2CAP_EXT_CTRL_SUPERVISE;
	562	else
	563	return (super << L2CAP_CTRL_SUPER_SHIFT) &
	564	L2CAP_CTRL_SUPERVISE;
	565	}
	566
bb58f747	567	extern int disable_ertm;
bb58f747 GP	568
	569	int l2cap_init_sockets(void);
	570	void l2cap_cleanup_sockets(void);
	571
8c1d787b	572	void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
dcba0dba	573	int __l2cap_wait_ack(struct sock *sk);
68983259	574
9e4425ff GP	575	int l2cap_add_psm(struct l2cap_chan chan, bdaddr_t src, __le16 psm);
	576	int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
	577
23691d75	578	struct l2cap_chan l2cap_chan_create(struct sock sk);
0f852724	579	void l2cap_chan_close(struct l2cap_chan *chan, int reason);
23691d75	580	void l2cap_chan_destroy(struct l2cap_chan *chan);
77a74c7e	581	int l2cap_chan_connect(struct l2cap_chan *chan);
9a91a04a	582	int l2cap_chan_send(struct l2cap_chan chan, struct msghdr msg, size_t len);
e328140f	583	void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
bb58f747	584
1da177e4	585	#endif /* __L2CAP_H */