linux/include/net/bluetooth/l2cap.h
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   1/* 
   2   BlueZ - Bluetooth protocol stack for Linux
   3   Copyright (C) 2000-2001 Qualcomm Incorporated
   4
   5   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   6
   7   This program is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License version 2 as
   9   published by the Free Software Foundation;
  10
  11   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  12   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  13   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  14   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  15   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
  16   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
  17   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
  18   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19
  20   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
  21   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
  22   SOFTWARE IS DISCLAIMED.
  23*/
  24
  25#ifndef __L2CAP_H
  26#define __L2CAP_H
  27
  28/* L2CAP defaults */
  29#define L2CAP_DEFAULT_MTU       672
  30#define L2CAP_DEFAULT_FLUSH_TO  0xFFFF
  31
  32#define L2CAP_CONN_TIMEOUT      (40000) /* 40 seconds */
  33#define L2CAP_INFO_TIMEOUT      (4000)  /*  4 seconds */
  34
  35/* L2CAP socket address */
  36struct sockaddr_l2 {
  37        sa_family_t     l2_family;
  38        __le16          l2_psm;
  39        bdaddr_t        l2_bdaddr;
  40};
  41
  42/* L2CAP socket options */
  43#define L2CAP_OPTIONS   0x01
  44struct l2cap_options {
  45        __u16 omtu;
  46        __u16 imtu;
  47        __u16 flush_to;
  48        __u8  mode;
  49};
  50
  51#define L2CAP_CONNINFO  0x02
  52struct l2cap_conninfo {
  53        __u16 hci_handle;
  54        __u8  dev_class[3];
  55};
  56
  57#define L2CAP_LM        0x03
  58#define L2CAP_LM_MASTER         0x0001
  59#define L2CAP_LM_AUTH           0x0002
  60#define L2CAP_LM_ENCRYPT        0x0004
  61#define L2CAP_LM_TRUSTED        0x0008
  62#define L2CAP_LM_RELIABLE       0x0010
  63#define L2CAP_LM_SECURE         0x0020
  64
  65/* L2CAP command codes */
  66#define L2CAP_COMMAND_REJ 0x01
  67#define L2CAP_CONN_REQ    0x02
  68#define L2CAP_CONN_RSP    0x03
  69#define L2CAP_CONF_REQ    0x04
  70#define L2CAP_CONF_RSP    0x05
  71#define L2CAP_DISCONN_REQ 0x06
  72#define L2CAP_DISCONN_RSP 0x07
  73#define L2CAP_ECHO_REQ    0x08
  74#define L2CAP_ECHO_RSP    0x09
  75#define L2CAP_INFO_REQ    0x0a
  76#define L2CAP_INFO_RSP    0x0b
  77
  78/* L2CAP structures */
  79struct l2cap_hdr {
  80        __le16     len;
  81        __le16     cid;
  82} __attribute__ ((packed));
  83#define L2CAP_HDR_SIZE          4
  84
  85struct l2cap_cmd_hdr {
  86        __u8       code;
  87        __u8       ident;
  88        __le16     len;
  89} __attribute__ ((packed));
  90#define L2CAP_CMD_HDR_SIZE      4
  91
  92struct l2cap_cmd_rej {
  93        __le16     reason;
  94} __attribute__ ((packed));
  95
  96struct l2cap_conn_req {
  97        __le16     psm;
  98        __le16     scid;
  99} __attribute__ ((packed));
 100
 101struct l2cap_conn_rsp {
 102        __le16     dcid;
 103        __le16     scid;
 104        __le16     result;
 105        __le16     status;
 106} __attribute__ ((packed));
 107
 108/* connect result */
 109#define L2CAP_CR_SUCCESS    0x0000
 110#define L2CAP_CR_PEND       0x0001
 111#define L2CAP_CR_BAD_PSM    0x0002
 112#define L2CAP_CR_SEC_BLOCK  0x0003
 113#define L2CAP_CR_NO_MEM     0x0004
 114
 115/* connect status */
 116#define L2CAP_CS_NO_INFO      0x0000
 117#define L2CAP_CS_AUTHEN_PEND  0x0001
 118#define L2CAP_CS_AUTHOR_PEND  0x0002
 119
 120struct l2cap_conf_req {
 121        __le16     dcid;
 122        __le16     flags;
 123        __u8       data[0];
 124} __attribute__ ((packed));
 125
 126struct l2cap_conf_rsp {
 127        __le16     scid;
 128        __le16     flags;
 129        __le16     result;
 130        __u8       data[0];
 131} __attribute__ ((packed));
 132
 133#define L2CAP_CONF_SUCCESS      0x0000
 134#define L2CAP_CONF_UNACCEPT     0x0001
 135#define L2CAP_CONF_REJECT       0x0002
 136#define L2CAP_CONF_UNKNOWN      0x0003
 137
 138struct l2cap_conf_opt {
 139        __u8       type;
 140        __u8       len;
 141        __u8       val[0];
 142} __attribute__ ((packed));
 143#define L2CAP_CONF_OPT_SIZE     2
 144
 145#define L2CAP_CONF_MTU          0x01
 146#define L2CAP_CONF_FLUSH_TO     0x02
 147#define L2CAP_CONF_QOS          0x03
 148#define L2CAP_CONF_RFC          0x04
 149
 150#define L2CAP_CONF_MAX_SIZE     22
 151
 152struct l2cap_conf_rfc {
 153        __u8       mode;
 154        __u8       txwin_size;
 155        __u8       max_transmit;
 156        __le16     retrans_timeout;
 157        __le16     monitor_timeout;
 158        __le16     max_pdu_size;
 159} __attribute__ ((packed));
 160
 161#define L2CAP_MODE_BASIC        0x00
 162#define L2CAP_MODE_RETRANS      0x01
 163#define L2CAP_MODE_FLOWCTL      0x02
 164
 165struct l2cap_disconn_req {
 166        __le16     dcid;
 167        __le16     scid;
 168} __attribute__ ((packed));
 169
 170struct l2cap_disconn_rsp {
 171        __le16     dcid;
 172        __le16     scid;
 173} __attribute__ ((packed));
 174
 175struct l2cap_info_req {
 176        __le16      type;
 177} __attribute__ ((packed));
 178
 179struct l2cap_info_rsp {
 180        __le16      type;
 181        __le16      result;
 182        __u8        data[0];
 183} __attribute__ ((packed));
 184
 185/* info type */
 186#define L2CAP_IT_CL_MTU     0x0001
 187#define L2CAP_IT_FEAT_MASK  0x0002
 188
 189/* info result */
 190#define L2CAP_IR_SUCCESS    0x0000
 191#define L2CAP_IR_NOTSUPP    0x0001
 192
 193/* ----- L2CAP connections ----- */
 194struct l2cap_chan_list {
 195        struct sock     *head;
 196        rwlock_t        lock;
 197        long            num;
 198};
 199
 200struct l2cap_conn {
 201        struct hci_conn *hcon;
 202
 203        bdaddr_t        *dst;
 204        bdaddr_t        *src;
 205
 206        unsigned int    mtu;
 207
 208        __u32           feat_mask;
 209
 210        __u8            info_state;
 211        __u8            info_ident;
 212
 213        struct timer_list info_timer;
 214
 215        spinlock_t      lock;
 216
 217        struct sk_buff *rx_skb;
 218        __u32           rx_len;
 219        __u8            rx_ident;
 220        __u8            tx_ident;
 221
 222        struct l2cap_chan_list chan_list;
 223};
 224
 225#define L2CAP_INFO_CL_MTU_REQ_SENT      0x01
 226#define L2CAP_INFO_FEAT_MASK_REQ_SENT   0x02
 227
 228/* ----- L2CAP channel and socket info ----- */
 229#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
 230
 231struct l2cap_pinfo {
 232        struct bt_sock  bt;
 233        __le16          psm;
 234        __u16           dcid;
 235        __u16           scid;
 236
 237        __u16           imtu;
 238        __u16           omtu;
 239        __u16           flush_to;
 240
 241        __u32           link_mode;
 242
 243        __u8            conf_req[64];
 244        __u8            conf_len;
 245        __u8            conf_state;
 246        __u8            conf_retry;
 247
 248        __u8            ident;
 249
 250        __le16          sport;
 251
 252        struct l2cap_conn       *conn;
 253        struct sock             *next_c;
 254        struct sock             *prev_c;
 255};
 256
 257#define L2CAP_CONF_REQ_SENT     0x01
 258#define L2CAP_CONF_INPUT_DONE   0x02
 259#define L2CAP_CONF_OUTPUT_DONE  0x04
 260
 261#define L2CAP_CONF_MAX_RETRIES  2
 262
 263void l2cap_load(void);
 264
 265#endif /* __L2CAP_H */
 266