include/net/bluetooth/l2cap.h

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
l2cap_chan_lock
l2cap_chan_unlock
l2cap_set_timer
l2cap_clear_timer
__seq_offset
__next_seq
l2cap_chan_no_new_connection
l2cap_chan_no_recv
l2cap_chan_no_alloc_skb
l2cap_chan_no_teardown
l2cap_chan_no_close
l2cap_chan_no_ready
l2cap_chan_no_state_change
l2cap_chan_no_defer
l2cap_chan_no_suspend
l2cap_chan_no_resume
l2cap_chan_no_set_shutdown
l2cap_chan_no_get_sndtimeo
l2cap_chan_no_memcpy_fromiovec
/*
   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>

/* 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_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_A2MP_DEFAULT_MTU          670

/* 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_CREATE_CHAN_REQ   0x0c
#define L2CAP_CREATE_CHAN_RSP   0x0d
#define L2CAP_MOVE_CHAN_REQ     0x0e
#define L2CAP_MOVE_CHAN_RSP     0x0f
#define L2CAP_MOVE_CHAN_CFM     0x10
#define L2CAP_MOVE_CHAN_CFM_RSP 0x11
#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

/* 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 fixed channels */
#define L2CAP_FC_SIG_BREDR      0x02
#define L2CAP_FC_CONNLESS       0x04
#define L2CAP_FC_A2MP           0x08
#define L2CAP_FC_ATT            0x10
#define L2CAP_FC_SIG_LE         0x20
#define L2CAP_FC_SMP_LE         0x40

/* 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_POLL_SHIFT           4
#define L2CAP_CTRL_FINAL_SHIFT          7
#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_FINAL_SHIFT      1
#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_POLL_SHIFT       18
#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
#define L2CAP_ENH_HDR_SIZE      6
#define L2CAP_EXT_HDR_SIZE      8

#define L2CAP_FCS_SIZE          2
#define L2CAP_SDULEN_SIZE       2
#define L2CAP_PSMLEN_SIZE       2
#define L2CAP_ENH_CTRL_SIZE     2
#define L2CAP_EXT_CTRL_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;

/* protocol/service multiplexer (PSM) */
#define L2CAP_PSM_SDP           0x0001
#define L2CAP_PSM_RFCOMM        0x0003
#define L2CAP_PSM_3DSP          0x0021

/* channel identifier */
#define L2CAP_CID_SIGNALING     0x0001
#define L2CAP_CID_CONN_LESS     0x0002
#define L2CAP_CID_A2MP          0x0003
#define L2CAP_CID_ATT           0x0004
#define L2CAP_CID_LE_SIGNALING  0x0005
#define L2CAP_CID_SMP           0x0006
#define L2CAP_CID_DYN_START     0x0040
#define L2CAP_CID_DYN_END       0xffff
#define L2CAP_CID_LE_DYN_END    0x007f

/* connect/create channel results */
#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
#define L2CAP_CR_BAD_AMP        0x0005
#define L2CAP_CR_AUTHENTICATION 0x0005
#define L2CAP_CR_AUTHORIZATION  0x0006
#define L2CAP_CR_BAD_KEY_SIZE   0x0007
#define L2CAP_CR_ENCRYPTION     0x0008

/* connect/create channel 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
#define L2CAP_CONF_PENDING      0x0004
#define L2CAP_CONF_EFS_REJECT   0x0005

/* configuration req/rsp continuation flag */
#define L2CAP_CONF_FLAG_CONTINUATION    0x0001

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_EFS          0x06
#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

/* Unlike the above this one doesn't actually map to anything that would
 * ever be sent over the air. Therefore, use a value that's unlikely to
 * ever be used in the BR/EDR configuration phase.
 */
#define L2CAP_MODE_LE_FLOWCTL   0x80

struct l2cap_conf_efs {
        __u8    id;
        __u8    stype;
        __le16  msdu;
        __le32  sdu_itime;
        __le32  acc_lat;
        __le32  flush_to;
} __packed;

#define L2CAP_SERV_NOTRAFIC     0x00
#define L2CAP_SERV_BESTEFFORT   0x01
#define L2CAP_SERV_GUARANTEED   0x02

#define L2CAP_BESTEFFORT_ID     0x01

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;

struct l2cap_create_chan_req {
        __le16      psm;
        __le16      scid;
        __u8        amp_id;
} __packed;

struct l2cap_create_chan_rsp {
        __le16      dcid;
        __le16      scid;
        __le16      result;
        __le16      status;
} __packed;

struct l2cap_move_chan_req {
        __le16      icid;
        __u8        dest_amp_id;
} __packed;

struct l2cap_move_chan_rsp {
        __le16      icid;
        __le16      result;
} __packed;

#define L2CAP_MR_SUCCESS        0x0000
#define L2CAP_MR_PEND           0x0001
#define L2CAP_MR_BAD_ID         0x0002
#define L2CAP_MR_SAME_ID        0x0003
#define L2CAP_MR_NOT_SUPP       0x0004
#define L2CAP_MR_COLLISION      0x0005
#define L2CAP_MR_NOT_ALLOWED    0x0006

struct l2cap_move_chan_cfm {
        __le16      icid;
        __le16      result;
} __packed;

#define L2CAP_MC_CONFIRMED      0x0000
#define L2CAP_MC_UNCONFIRMED    0x0001

struct l2cap_move_chan_cfm_rsp {
        __le16      icid;
} __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

#define L2CAP_LE_MAX_CREDITS            10
#define L2CAP_LE_DEFAULT_MPS            230

struct l2cap_le_conn_req {
        __le16     psm;
        __le16     scid;
        __le16     mtu;
        __le16     mps;
        __le16     credits;
} __packed;

struct l2cap_le_conn_rsp {
        __le16     dcid;
        __le16     mtu;
        __le16     mps;
        __le16     credits;
        __le16     result;
} __packed;

struct l2cap_le_credits {
        __le16     cid;
        __le16     credits;
} __packed;

/* ----- L2CAP channels and connections ----- */
struct l2cap_seq_list {
        __u16   head;
        __u16   tail;
        __u16   mask;
        __u16   *list;
};

#define L2CAP_SEQ_LIST_CLEAR    0xFFFF
#define L2CAP_SEQ_LIST_TAIL     0x8000

struct l2cap_chan {
        struct l2cap_conn       *conn;
        struct hci_conn         *hs_hcon;
        struct hci_chan         *hs_hchan;
        struct kref     kref;

        __u8            state;

        bdaddr_t        dst;
        __u8            dst_type;
        bdaddr_t        src;
        __u8            src_type;
        __le16          psm;
        __le16          sport;
        __u16           dcid;
        __u16           scid;

        __u16           imtu;
        __u16           omtu;
        __u16           flush_to;
        __u8            mode;
        __u8            chan_type;
        __u8            chan_policy;

        __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;
        __u16           tx_win_max;
        __u16           ack_win;
        __u8            max_tx;
        __u16           retrans_timeout;
        __u16           monitor_timeout;
        __u16           mps;

        __u16           tx_credits;
        __u16           rx_credits;

        __u8            tx_state;
        __u8            rx_state;

        unsigned long   conf_state;
        unsigned long   conn_state;
        unsigned long   flags;

        __u8            remote_amp_id;
        __u8            local_amp_id;
        __u8            move_id;
        __u8            move_state;
        __u8            move_role;

        __u16           next_tx_seq;
        __u16           expected_ack_seq;
        __u16           expected_tx_seq;
        __u16           buffer_seq;
        __u16           srej_save_reqseq;
        __u16           last_acked_seq;
        __u16           frames_sent;
        __u16           unacked_frames;
        __u8            retry_count;
        __u16           sdu_len;
        struct sk_buff  *sdu;
        struct sk_buff  *sdu_last_frag;

        __u16           remote_tx_win;
        __u8            remote_max_tx;
        __u16           remote_mps;

        __u8            local_id;
        __u8            local_stype;
        __u16           local_msdu;
        __u32           local_sdu_itime;
        __u32           local_acc_lat;
        __u32           local_flush_to;

        __u8            remote_id;
        __u8            remote_stype;
        __u16           remote_msdu;
        __u32           remote_sdu_itime;
        __u32           remote_acc_lat;
        __u32           remote_flush_to;

        struct delayed_work     chan_timer;
        struct delayed_work     retrans_timer;
        struct delayed_work     monitor_timer;
        struct delayed_work     ack_timer;

        struct sk_buff          *tx_send_head;
        struct sk_buff_head     tx_q;
        struct sk_buff_head     srej_q;
        struct l2cap_seq_list   srej_list;
        struct l2cap_seq_list   retrans_list;

        struct list_head        list;
        struct list_head        global_l;

        void                    *data;
        const struct l2cap_ops  *ops;
        struct mutex            lock;
};

struct l2cap_ops {
        char                    *name;

        struct l2cap_chan       *(*new_connection) (struct l2cap_chan *chan);
        int                     (*recv) (struct l2cap_chan * chan,
                                         struct sk_buff *skb);
        void                    (*teardown) (struct l2cap_chan *chan, int err);
        void                    (*close) (struct l2cap_chan *chan);
        void                    (*state_change) (struct l2cap_chan *chan,
                                                 int state, int err);
        void                    (*ready) (struct l2cap_chan *chan);
        void                    (*defer) (struct l2cap_chan *chan);
        void                    (*resume) (struct l2cap_chan *chan);
        void                    (*suspend) (struct l2cap_chan *chan);
        void                    (*set_shutdown) (struct l2cap_chan *chan);
        long                    (*get_sndtimeo) (struct l2cap_chan *chan);
        struct sk_buff          *(*alloc_skb) (struct l2cap_chan *chan,
                                               unsigned long hdr_len,
                                               unsigned long len, int nb);
        int                     (*memcpy_fromiovec) (struct l2cap_chan *chan,
                                                     unsigned char *kdata,
                                                     struct iovec *iov,
                                                     int len);
};

struct l2cap_conn {
        struct hci_conn         *hcon;
        struct hci_chan         *hchan;

        unsigned int            mtu;

        __u32                   feat_mask;
        __u8                    fixed_chan_mask;
        bool                    hs_enabled;

        __u8                    info_state;
        __u8                    info_ident;

        struct delayed_work     info_timer;

        struct sk_buff          *rx_skb;
        __u32                   rx_len;
        __u8                    tx_ident;
        struct mutex            ident_lock;

        struct sk_buff_head     pending_rx;
        struct work_struct      pending_rx_work;

        struct work_struct      id_addr_update_work;

        __u8                    disc_reason;

        struct l2cap_chan       *smp;

        struct list_head        chan_l;
        struct mutex            chan_lock;
        struct kref             ref;
        struct list_head        users;
};

struct l2cap_user {
        struct list_head list;
        int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
        void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
};

#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
#define L2CAP_CHAN_FIXED                4

/* ----- 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_RECV_NO_FCS,
        CONF_STATE2_DEVICE,
        CONF_EWS_RECV,
        CONF_LOC_CONF_PEND,
        CONF_REM_CONF_PEND,
        CONF_NOT_COMPLETE,
};

#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,
        FLAG_EFS_ENABLE,
        FLAG_DEFER_SETUP,
        FLAG_LE_CONN_REQ_SENT,
        FLAG_PENDING_SECURITY,
        FLAG_HOLD_HCI_CONN,
};

enum {
        L2CAP_TX_STATE_XMIT,
        L2CAP_TX_STATE_WAIT_F,
};

enum {
        L2CAP_RX_STATE_RECV,
        L2CAP_RX_STATE_SREJ_SENT,
        L2CAP_RX_STATE_MOVE,
        L2CAP_RX_STATE_WAIT_P,
        L2CAP_RX_STATE_WAIT_F,
};

enum {
        L2CAP_TXSEQ_EXPECTED,
        L2CAP_TXSEQ_EXPECTED_SREJ,
        L2CAP_TXSEQ_UNEXPECTED,
        L2CAP_TXSEQ_UNEXPECTED_SREJ,
        L2CAP_TXSEQ_DUPLICATE,
        L2CAP_TXSEQ_DUPLICATE_SREJ,
        L2CAP_TXSEQ_INVALID,
        L2CAP_TXSEQ_INVALID_IGNORE,
};

enum {
        L2CAP_EV_DATA_REQUEST,
        L2CAP_EV_LOCAL_BUSY_DETECTED,
        L2CAP_EV_LOCAL_BUSY_CLEAR,
        L2CAP_EV_RECV_REQSEQ_AND_FBIT,
        L2CAP_EV_RECV_FBIT,
        L2CAP_EV_RETRANS_TO,
        L2CAP_EV_MONITOR_TO,
        L2CAP_EV_EXPLICIT_POLL,
        L2CAP_EV_RECV_IFRAME,
        L2CAP_EV_RECV_RR,
        L2CAP_EV_RECV_REJ,
        L2CAP_EV_RECV_RNR,
        L2CAP_EV_RECV_SREJ,
        L2CAP_EV_RECV_FRAME,
};

enum {
        L2CAP_MOVE_ROLE_NONE,
        L2CAP_MOVE_ROLE_INITIATOR,
        L2CAP_MOVE_ROLE_RESPONDER,
};

enum {
        L2CAP_MOVE_STABLE,
        L2CAP_MOVE_WAIT_REQ,
        L2CAP_MOVE_WAIT_RSP,
        L2CAP_MOVE_WAIT_RSP_SUCCESS,
        L2CAP_MOVE_WAIT_CONFIRM,
        L2CAP_MOVE_WAIT_CONFIRM_RSP,
        L2CAP_MOVE_WAIT_LOGICAL_COMP,
        L2CAP_MOVE_WAIT_LOGICAL_CFM,
        L2CAP_MOVE_WAIT_LOCAL_BUSY,
        L2CAP_MOVE_WAIT_PREPARE,
};

void l2cap_chan_hold(struct l2cap_chan *c);
void l2cap_chan_put(struct l2cap_chan *c);

static inline void l2cap_chan_lock(struct l2cap_chan *chan)
{
        mutex_lock(&chan->lock);
}

static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
{
        mutex_unlock(&chan->lock);
}

static inline void l2cap_set_timer(struct l2cap_chan *chan,
                                   struct delayed_work *work, long timeout)
{
        BT_DBG("chan %p state %s timeout %ld", chan,
               state_to_string(chan->state), timeout);

        /* If delayed work cancelled do not hold(chan)
           since it is already done with previous set_timer */
        if (!cancel_delayed_work(work))
                l2cap_chan_hold(chan);

        schedule_delayed_work(work, timeout);
}

static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
                                     struct delayed_work *work)
{
        bool ret;

        /* put(chan) if delayed work cancelled otherwise it
           is done in delayed work function */
        ret = cancel_delayed_work(work);
        if (ret)
                l2cap_chan_put(chan);

        return ret;
}

#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 __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
                msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)

static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
{
        if (seq1 >= seq2)
                return seq1 - seq2;
        else
                return chan->tx_win_max + 1 - seq2 + seq1;
}

static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
{
        return (seq + 1) % (chan->tx_win_max + 1);
}

static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
{
        return NULL;
}

static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb)
{
        return -ENOSYS;
}

static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan,
                                                      unsigned long hdr_len,
                                                      unsigned long len, int nb)
{
        return ERR_PTR(-ENOSYS);
}

static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
{
}

static inline void l2cap_chan_no_close(struct l2cap_chan *chan)
{
}

static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
{
}

static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan,
                                              int state, int err)
{
}

static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
{
}

static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan)
{
}

static inline void l2cap_chan_no_resume(struct l2cap_chan *chan)
{
}

static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
{
}

static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
{
        return 0;
}

static inline int l2cap_chan_no_memcpy_fromiovec(struct l2cap_chan *chan,
                                                 unsigned char *kdata,
                                                 struct iovec *iov,
                                                 int len)
{
        /* Following is safe since for compiler definitions of kvec and
         * iovec are identical, yielding the same in-core layout and alignment
         */
        struct kvec *vec = (struct kvec *)iov;

        while (len > 0) {
                if (vec->iov_len) {
                        int copy = min_t(unsigned int, len, vec->iov_len);
                        memcpy(kdata, vec->iov_base, copy);
                        len -= copy;
                        kdata += copy;
                        vec->iov_base += copy;
                        vec->iov_len -= copy;
                }
                vec++;
        }

        return 0;
}

extern bool disable_ertm;

int l2cap_init_sockets(void);
void l2cap_cleanup_sockets(void);
bool l2cap_is_socket(struct socket *sock);

void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);

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(void);
void l2cap_chan_close(struct l2cap_chan *chan, int reason);
int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
                       bdaddr_t *dst, u8 dst_type);
int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator);
void l2cap_chan_set_defaults(struct l2cap_chan *chan);
int l2cap_ertm_init(struct l2cap_chan *chan);
void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
void l2cap_chan_del(struct l2cap_chan *chan, int err);
void l2cap_send_conn_req(struct l2cap_chan *chan);
void l2cap_move_start(struct l2cap_chan *chan);
void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
                       u8 status);
void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);

struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn);
void l2cap_conn_put(struct l2cap_conn *conn);

int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);

#endif /* __L2CAP_H */
/* [<][>][^][v][top][bottom][index][help] */
root/include/net/bluetooth/l2cap.h

DEFINITIONS
