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   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

#include <asm/unaligned.h>
#include <linux/atomic.h>

/* L2CAP defaults */
#define L2CAP_DEFAULT_MTU		672
#define L2CAP_DEFAULT_MIN_MTU		48
#define L2CAP_DEFAULT_FLUSH_TO		0xFFFF
#define L2CAP_EFS_DEFAULT_FLUSH_TO	0xFFFFFFFF
#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	1492    /* Sized for AMP packet */
#define L2CAP_DEFAULT_ACK_TO		200
#define L2CAP_DEFAULT_MAX_SDU_SIZE	0xFFFF
#define L2CAP_DEFAULT_SDU_ITIME		0xFFFFFFFF
#define L2CAP_DEFAULT_ACC_LAT		0xFFFFFFFF
#define L2CAP_BREDR_MAX_PAYLOAD		1019    /* 3-DH5 packet */
#define L2CAP_LE_MIN_MTU		23
#define L2CAP_ECRED_CONN_SCID_MAX	5

#define L2CAP_DISC_TIMEOUT		msecs_to_jiffies(100)
#define L2CAP_DISC_REJ_TIMEOUT		msecs_to_jiffies(5000)
#define L2CAP_ENC_TIMEOUT		msecs_to_jiffies(5000)
#define L2CAP_CONN_TIMEOUT		msecs_to_jiffies(40000)
#define L2CAP_INFO_TIMEOUT		msecs_to_jiffies(4000)
#define L2CAP_MOVE_TIMEOUT		msecs_to_jiffies(4000)
#define L2CAP_MOVE_ERTX_TIMEOUT		msecs_to_jiffies(60000)
#define L2CAP_WAIT_ACK_POLL_PERIOD	msecs_to_jiffies(200)
#define L2CAP_WAIT_ACK_TIMEOUT		msecs_to_jiffies(10000)

/* L2CAP socket address */
struct sockaddr_l2 {
	sa_family_t	l2_family;
	__le16		l2_psm;
	bdaddr_t	l2_bdaddr;
	__le16		l2_cid;
	__u8		l2_bdaddr_type;
};

/* 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
#define L2CAP_LM_FIPS		0x0040

/* 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
#define L2CAP_LE_CONN_REQ	0x14
#define L2CAP_LE_CONN_RSP	0x15
#define L2CAP_LE_CREDITS	0x16
#define L2CAP_ECRED_CONN_REQ	0x17
#define L2CAP_ECRED_CONN_RSP	0x18
#define L2CAP_ECRED_RECONF_REQ	0x19
#define L2CAP_ECRED_RECONF_RSP	0x1a

/* L2CAP extended feature mask */
#define L2CAP_FEAT_FLOWCTL	0x00000001
#define L2CAP_FEAT_RE