[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

/* 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

/* ----- L2CAP connections ----- */
struct l2cap_chan_list {
	struct sock	*head;
	rwlock_t	lock;
	long		num;
};

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		rx_ident;
	__u8		tx_ident;

	__u8		disc_reason;

	struct l2cap_chan_list chan_list;
};

struct sock_del_list {
	struct sock *sk;
	struct list_head list;
};

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

/* ----- L2CAP channel and socket info ----- */
#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
#define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue)
#define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue)
#define BUSY_QUEUE(sk) (&l2cap_pi(sk)->busy_queue)
#define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list)

struct srej_list {
	__u8	tx_seq;
	struct list_head list;
};

struct l2cap_pinfo {
	struct bt_sock	bt;
	__le16		psm;
	__u16		dcid;
	__u16		scid;

	__u16		imtu;
	__u16		omtu;
	__u16		flush_to;
	__u8		mode;
	__u8		num_conf_req;
	__u8		num_conf_rsp;

	__u8		fcs;
	__u8		sec_level;
	__u8		role_switch;
	__u8		force_reliable;
	__u8		flushable;

	__u8		conf_req[64];
	__u8		conf_len;
	__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		ident;

	__u8		tx_win;
	__u8		max_tx;
	__u8		remote_tx_win;
	__u8		remote_max_tx;
	__u16		retrans_timeout;
	__u16		monitor_timeout;
	__u16		remote_mps;
	__u16		mps;

	__le16		sport;

	struct timer_list	retrans_timer;
	struct timer_list	monitor_timer;
	struct timer_list	ack_timer;
	struct sk_buff_head	tx_queue;
	struct sk_buff_head	srej_queue;
	struct sk_buff_head	busy_queue;
	struct work_struct	busy_work;
	struct srej_list	srej_l;
	struct l2cap_conn	*conn;
	struct sock		*next_c;
	struct sock		*prev_c;
};

#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(&l2cap_pi(sk)->retrans_timer, \
		jiffies +  msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
#define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \
		jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
#define __mod_ack_timer() mod_timer(&l2cap_pi(sk)->ack_timer, \
		jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));

static inline int l2cap_tx_window_full(struct sock *sk)
{
	struct l2cap_pinfo *pi = l2cap_pi(sk);
	int sub;

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

	if (sub < 0)
		sub += 64;

	return sub == pi->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;
extern const struct proto_ops l2cap_sock_ops;
extern struct bt_sock_list l2cap_sk_list;

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

u8 l2cap_get_ident(struct l2cap_conn *conn);
void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data);
int l2cap_build_conf_req(struct sock *sk, void *data);
int __l2cap_wait_ack(struct sock *sk);

struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len);
struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len);
struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen);
int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len);
void l2cap_do_send(struct sock *sk, struct sk_buff *skb);
void l2cap_streaming_send(struct sock *sk);
int l2cap_ertm_send(struct sock *sk);

void l2cap_sock_set_timer(struct sock *sk, long timeout);
void l2cap_sock_clear_timer(struct sock *sk);
void __l2cap_sock_close(struct sock *sk, int reason);
void l2cap_sock_kill(struct sock *sk);
void l2cap_sock_init(struct sock *sk, struct sock *parent);
struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
							int proto, gfp_t prio);
void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk, int err);
void l2cap_chan_del(struct sock *sk, int err);
int l2cap_do_connect(struct sock *sk);

#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
	92
	93	/* L2CAP feature mask */
	94	#define L2CAP_FEAT_FLOWCTL 0x00000001
	95	#define L2CAP_FEAT_RETRANS 0x00000002
	96	#define L2CAP_FEAT_ERTM 0x00000008
	97	#define L2CAP_FEAT_STREAMING 0x00000010
	98	#define L2CAP_FEAT_FCS 0x00000020
	99	#define L2CAP_FEAT_FIXED_CHAN 0x00000080
	100
	101	/* L2CAP checksum option */
	102	#define L2CAP_FCS_NONE 0x00
	103	#define L2CAP_FCS_CRC16 0x01
1da177e4	104
1c2acffb GP	105	/* L2CAP Control Field bit masks */
	106	#define L2CAP_CTRL_SAR 0xC000
	107	#define L2CAP_CTRL_REQSEQ 0x3F00
	108	#define L2CAP_CTRL_TXSEQ 0x007E
	109	#define L2CAP_CTRL_RETRANS 0x0080
	110	#define L2CAP_CTRL_FINAL 0x0080
	111	#define L2CAP_CTRL_POLL 0x0010
	112	#define L2CAP_CTRL_SUPERVISE 0x000C
	113	#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
	114
	115	#define L2CAP_CTRL_TXSEQ_SHIFT 1
	116	#define L2CAP_CTRL_REQSEQ_SHIFT 8
8f17154f	117	#define L2CAP_CTRL_SAR_SHIFT 14
1c2acffb GP	118
	119	/* L2CAP Supervisory Function */
	120	#define L2CAP_SUPER_RCV_READY 0x0000
	121	#define L2CAP_SUPER_REJECT 0x0004
	122	#define L2CAP_SUPER_RCV_NOT_READY 0x0008
	123	#define L2CAP_SUPER_SELECT_REJECT 0x000C
	124
	125	/* L2CAP Segmentation and Reassembly */
	126	#define L2CAP_SDU_UNSEGMENTED 0x0000
	127	#define L2CAP_SDU_START 0x4000
	128	#define L2CAP_SDU_END 0x8000
	129	#define L2CAP_SDU_CONTINUE 0xC000
	130
1da177e4 LT	131	/* L2CAP structures */
1da177e4 LT	132	struct l2cap_hdr {
8e036fc3 AV	133	__le16 len;
8e036fc3 AV	134	__le16 cid;
66c853cc	135	} __packed;
1da177e4 LT	136	#define L2CAP_HDR_SIZE 4
	137
	138	struct l2cap_cmd_hdr {
	139	__u8 code;
	140	__u8 ident;
8e036fc3	141	__le16 len;
66c853cc	142	} __packed;
1da177e4 LT	143	#define L2CAP_CMD_HDR_SIZE 4
	144
	145	struct l2cap_cmd_rej {
8e036fc3	146	__le16 reason;
66c853cc	147	} __packed;
1da177e4 LT	148
1da177e4 LT	149	struct l2cap_conn_req {
8e036fc3 AV	150	__le16 psm;
8e036fc3 AV	151	__le16 scid;
66c853cc	152	} __packed;
1da177e4 LT	153
1da177e4 LT	154	struct l2cap_conn_rsp {
8e036fc3 AV	155	__le16 dcid;
	156	__le16 scid;
	157	__le16 result;
	158	__le16 status;
66c853cc	159	} __packed;
1da177e4	160
8db4dc46 GP	161	/* channel indentifier */
	162	#define L2CAP_CID_SIGNALING 0x0001
	163	#define L2CAP_CID_CONN_LESS 0x0002
acd7d370 VT	164	#define L2CAP_CID_LE_DATA 0x0004
	165	#define L2CAP_CID_LE_SIGNALING 0x0005
	166	#define L2CAP_CID_SMP 0x0006
8db4dc46 GP	167	#define L2CAP_CID_DYN_START 0x0040
	168	#define L2CAP_CID_DYN_END 0xffff
	169
1da177e4	170	/* connect result */
47ec1dcd MH	171	#define L2CAP_CR_SUCCESS 0x0000
	172	#define L2CAP_CR_PEND 0x0001
	173	#define L2CAP_CR_BAD_PSM 0x0002
	174	#define L2CAP_CR_SEC_BLOCK 0x0003
	175	#define L2CAP_CR_NO_MEM 0x0004
1da177e4 LT	176
1da177e4 LT	177	/* connect status */
47ec1dcd MH	178	#define L2CAP_CS_NO_INFO 0x0000
	179	#define L2CAP_CS_AUTHEN_PEND 0x0001
	180	#define L2CAP_CS_AUTHOR_PEND 0x0002
1da177e4 LT	181
1da177e4 LT	182	struct l2cap_conf_req {
8e036fc3 AV	183	__le16 dcid;
8e036fc3 AV	184	__le16 flags;
1da177e4	185	__u8 data[0];
66c853cc	186	} __packed;
1da177e4 LT	187
1da177e4 LT	188	struct l2cap_conf_rsp {
8e036fc3 AV	189	__le16 scid;
	190	__le16 flags;
	191	__le16 result;
1da177e4	192	__u8 data[0];
66c853cc	193	} __packed;
1da177e4	194
5dee9e7c MH	195	#define L2CAP_CONF_SUCCESS 0x0000
	196	#define L2CAP_CONF_UNACCEPT 0x0001
	197	#define L2CAP_CONF_REJECT 0x0002
	198	#define L2CAP_CONF_UNKNOWN 0x0003
1da177e4 LT	199
	200	struct l2cap_conf_opt {
	201	__u8 type;
	202	__u8 len;
	203	__u8 val[0];
66c853cc	204	} __packed;
1da177e4 LT	205	#define L2CAP_CONF_OPT_SIZE 2
1da177e4 LT	206
589d2746	207	#define L2CAP_CONF_HINT 0x80
47ec1dcd	208	#define L2CAP_CONF_MASK 0x7f
589d2746	209
1da177e4 LT	210	#define L2CAP_CONF_MTU 0x01
	211	#define L2CAP_CONF_FLUSH_TO 0x02
	212	#define L2CAP_CONF_QOS 0x03
	213	#define L2CAP_CONF_RFC 0x04
47ec1dcd	214	#define L2CAP_CONF_FCS 0x05
1da177e4 LT	215
	216	#define L2CAP_CONF_MAX_SIZE 22
	217
6464f35f MH	218	struct l2cap_conf_rfc {
	219	__u8 mode;
	220	__u8 txwin_size;
	221	__u8 max_transmit;
	222	__le16 retrans_timeout;
	223	__le16 monitor_timeout;
	224	__le16 max_pdu_size;
66c853cc	225	} __packed;
6464f35f MH	226
	227	#define L2CAP_MODE_BASIC 0x00
	228	#define L2CAP_MODE_RETRANS 0x01
	229	#define L2CAP_MODE_FLOWCTL 0x02
47ec1dcd	230	#define L2CAP_MODE_ERTM 0x03
c6b03cf9	231	#define L2CAP_MODE_STREAMING 0x04
6464f35f	232
1da177e4	233	struct l2cap_disconn_req {
8e036fc3 AV	234	__le16 dcid;
8e036fc3 AV	235	__le16 scid;
66c853cc	236	} __packed;
1da177e4 LT	237
1da177e4 LT	238	struct l2cap_disconn_rsp {
8e036fc3 AV	239	__le16 dcid;
8e036fc3 AV	240	__le16 scid;
66c853cc	241	} __packed;
1da177e4 LT	242
1da177e4 LT	243	struct l2cap_info_req {
8e036fc3	244	__le16 type;
66c853cc	245	} __packed;
1da177e4 LT	246
1da177e4 LT	247	struct l2cap_info_rsp {
8e036fc3 AV	248	__le16 type;
8e036fc3 AV	249	__le16 result;
1da177e4	250	__u8 data[0];
66c853cc	251	} __packed;
1da177e4 LT	252
	253	/* info type */
	254	#define L2CAP_IT_CL_MTU 0x0001
	255	#define L2CAP_IT_FEAT_MASK 0x0002
e1027a7c	256	#define L2CAP_IT_FIXED_CHAN 0x0003
1da177e4 LT	257
	258	/* info result */
	259	#define L2CAP_IR_SUCCESS 0x0000
	260	#define L2CAP_IR_NOTSUPP 0x0001
	261
	262	/* ----- L2CAP connections ----- */
	263	struct l2cap_chan_list {
	264	struct sock *head;
	265	rwlock_t lock;
	266	long num;
	267	};
	268
	269	struct l2cap_conn {
	270	struct hci_conn *hcon;
	271
	272	bdaddr_t *dst;
	273	bdaddr_t *src;
	274
	275	unsigned int mtu;
	276
4e8402a3 MH	277	__u32 feat_mask;
	278
	279	__u8 info_state;
	280	__u8 info_ident;
	281
	282	struct timer_list info_timer;
	283
1da177e4 LT	284	spinlock_t lock;
	285
	286	struct sk_buff *rx_skb;
	287	__u32 rx_len;
	288	__u8 rx_ident;
	289	__u8 tx_ident;
	290
2950f21a MH	291	__u8 disc_reason;
2950f21a MH	292
1da177e4 LT	293	struct l2cap_chan_list chan_list;
	294	};
	295
cf6c2c0b GP	296	struct sock_del_list {
	297	struct sock *sk;
	298	struct list_head list;
	299	};
	300
4e8402a3	301	#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
984947dc MH	302	#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
984947dc MH	303	#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
4e8402a3	304
1da177e4 LT	305	/* ----- L2CAP channel and socket info ----- */
1da177e4 LT	306	#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
1c2acffb	307	#define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue)
8f17154f	308	#define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue)
1890d36b	309	#define BUSY_QUEUE(sk) (&l2cap_pi(sk)->busy_queue)
8f17154f GP	310	#define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list)
	311
	312	struct srej_list {
	313	__u8 tx_seq;
	314	struct list_head list;
	315	};
1da177e4 LT	316
	317	struct l2cap_pinfo {
	318	struct bt_sock bt;
8e036fc3	319	__le16 psm;
1da177e4 LT	320	__u16 dcid;
	321	__u16 scid;
	322
	323	__u16 imtu;
	324	__u16 omtu;
	325	__u16 flush_to;
c6b03cf9	326	__u8 mode;
f2fcfcd6 GP	327	__u8 num_conf_req;
	328	__u8 num_conf_rsp;
	329
c6b03cf9 MH	330	__u8 fcs;
c6b03cf9 MH	331	__u8 sec_level;
2af6b9d5	332	__u8 role_switch;
c6b03cf9	333	__u8 force_reliable;
e702112f	334	__u8 flushable;
1da177e4	335
5dee9e7c MH	336	__u8 conf_req[64];
5dee9e7c MH	337	__u8 conf_len;
1da177e4	338	__u8 conf_state;
d5392c8f	339	__u16 conn_state;
1da177e4	340
1c2acffb GP	341	__u8 next_tx_seq;
1c2acffb GP	342	__u8 expected_ack_seq;
1c2acffb	343	__u8 expected_tx_seq;
8f17154f GP	344	__u8 buffer_seq;
8f17154f GP	345	__u8 buffer_seq_srej;
ef54fd93	346	__u8 srej_save_reqseq;
d5392c8f	347	__u8 frames_sent;
1c2acffb	348	__u8 unacked_frames;
e90bac06	349	__u8 retry_count;
803020c6	350	__u8 num_acked;
c74e560c GP	351	__u16 sdu_len;
	352	__u16 partial_sdu_len;
	353	struct sk_buff *sdu;
1c2acffb	354
1da177e4 LT	355	__u8 ident;
1da177e4 LT	356
14b5aa71	357	__u8 tx_win;
68d7f0ce	358	__u8 max_tx;
f2fcfcd6 GP	359	__u8 remote_tx_win;
	360	__u8 remote_max_tx;
	361	__u16 retrans_timeout;
	362	__u16 monitor_timeout;
1c762159 GP	363	__u16 remote_mps;
1c762159 GP	364	__u16 mps;
f2fcfcd6	365
8e036fc3	366	__le16 sport;
1da177e4	367
e90bac06 GP	368	struct timer_list retrans_timer;
e90bac06 GP	369	struct timer_list monitor_timer;
c1b4f43b	370	struct timer_list ack_timer;
1c2acffb	371	struct sk_buff_head tx_queue;
8f17154f	372	struct sk_buff_head srej_queue;
1890d36b GP	373	struct sk_buff_head busy_queue;
1890d36b GP	374	struct work_struct busy_work;
8f17154f	375	struct srej_list srej_l;
1da177e4 LT	376	struct l2cap_conn *conn;
	377	struct sock *next_c;
	378	struct sock *prev_c;
	379	};
	380
f2fcfcd6 GP	381	#define L2CAP_CONF_REQ_SENT 0x01
	382	#define L2CAP_CONF_INPUT_DONE 0x02
	383	#define L2CAP_CONF_OUTPUT_DONE 0x04
	384	#define L2CAP_CONF_MTU_DONE 0x08
	385	#define L2CAP_CONF_MODE_DONE 0x10
	386	#define L2CAP_CONF_CONNECT_PEND 0x20
fcc203c3	387	#define L2CAP_CONF_NO_FCS_RECV 0x40
f2fcfcd6 GP	388	#define L2CAP_CONF_STATE2_DEVICE 0x80
	389
	390	#define L2CAP_CONF_MAX_CONF_REQ 2
	391	#define L2CAP_CONF_MAX_CONF_RSP 2
861d6882	392
d5392c8f GP	393	#define L2CAP_CONN_SAR_SDU 0x0001
	394	#define L2CAP_CONN_SREJ_SENT 0x0002
	395	#define L2CAP_CONN_WAIT_F 0x0004
	396	#define L2CAP_CONN_SREJ_ACT 0x0008
	397	#define L2CAP_CONN_SEND_PBIT 0x0010
	398	#define L2CAP_CONN_REMOTE_BUSY 0x0020
	399	#define L2CAP_CONN_LOCAL_BUSY 0x0040
	400	#define L2CAP_CONN_REJ_ACT 0x0080
	401	#define L2CAP_CONN_SEND_FBIT 0x0100
1890d36b GP	402	#define L2CAP_CONN_RNR_SENT 0x0200
1890d36b GP	403	#define L2CAP_CONN_SAR_RETRY 0x0400
e90bac06 GP	404
	405	#define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \
	406	jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
	407	#define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \
	408	jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
c1b4f43b GP	409	#define __mod_ack_timer() mod_timer(&l2cap_pi(sk)->ack_timer, \
c1b4f43b GP	410	jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
c74e560c	411
1c2acffb GP	412	static inline int l2cap_tx_window_full(struct sock *sk)
	413	{
	414	struct l2cap_pinfo *pi = l2cap_pi(sk);
	415	int sub;
	416
	417	sub = (pi->next_tx_seq - pi->expected_ack_seq) % 64;
	418
	419	if (sub < 0)
	420	sub += 64;
	421
a02cec21	422	return sub == pi->remote_tx_win;
1c2acffb GP	423	}
1c2acffb GP	424
894718a6 AE	425	#define __get_txseq(ctrl) (((ctrl) & L2CAP_CTRL_TXSEQ) >> 1)
	426	#define __get_reqseq(ctrl) (((ctrl) & L2CAP_CTRL_REQSEQ) >> 8)
	427	#define __is_iframe(ctrl) (!((ctrl) & L2CAP_CTRL_FRAME_TYPE))
	428	#define __is_sframe(ctrl) ((ctrl) & L2CAP_CTRL_FRAME_TYPE)
	429	#define __is_sar_start(ctrl) (((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START)
1da177e4	430
bb58f747 GP	431	extern int disable_ertm;
	432	extern const struct proto_ops l2cap_sock_ops;
	433	extern struct bt_sock_list l2cap_sk_list;
	434
	435	int l2cap_init_sockets(void);
	436	void l2cap_cleanup_sockets(void);
	437
68983259 GP	438	u8 l2cap_get_ident(struct l2cap_conn *conn);
	439	void l2cap_send_cmd(struct l2cap_conn conn, u8 ident, u8 code, u16 len, void data);
	440	int l2cap_build_conf_req(struct sock sk, void data);
dcba0dba	441	int __l2cap_wait_ack(struct sock *sk);
68983259	442
fd83ccdb GP	443	struct sk_buff l2cap_create_connless_pdu(struct sock sk, struct msghdr *msg, size_t len);
	444	struct sk_buff l2cap_create_basic_pdu(struct sock sk, struct msghdr *msg, size_t len);
	445	struct sk_buff l2cap_create_iframe_pdu(struct sock sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen);
	446	int l2cap_sar_segment_sdu(struct sock sk, struct msghdr msg, size_t len);
	447	void l2cap_do_send(struct sock sk, struct sk_buff skb);
	448	void l2cap_streaming_send(struct sock *sk);
	449	int l2cap_ertm_send(struct sock *sk);
	450
bb58f747	451	void l2cap_sock_set_timer(struct sock *sk, long timeout);
dcba0dba	452	void l2cap_sock_clear_timer(struct sock *sk);
bb58f747 GP	453	void __l2cap_sock_close(struct sock *sk, int reason);
	454	void l2cap_sock_kill(struct sock *sk);
	455	void l2cap_sock_init(struct sock sk, struct sock parent);
	456	struct sock l2cap_sock_alloc(struct net net, struct socket *sock,
	457	int proto, gfp_t prio);
6de0702b GP	458	void l2cap_send_disconn_req(struct l2cap_conn conn, struct sock sk, int err);
6de0702b GP	459	void l2cap_chan_del(struct sock *sk, int err);
4e34c50b	460	int l2cap_do_connect(struct sock *sk);
bb58f747	461
1da177e4	462	#endif /* __L2CAP_H */