include/net/bluetooth/l2cap.h

   1 /*
   2    BlueZ - Bluetooth protocol stack for Linux
   3    Copyright (C) 2000-2001 Qualcomm Incorporated
   4    Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
   5    Copyright (C) 2010 Google Inc.
   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
  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
  20    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21
  22    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  23    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  24    SOFTWARE IS DISCLAIMED.
  25 */
  26
  27 #ifndef __L2CAP_H
  28 #define __L2CAP_H
  29
  30 #include <asm/unaligned.h>
  31
  32 /* L2CAP defaults */
  33 #define L2CAP_DEFAULT_MTU               672
  34 #define L2CAP_DEFAULT_MIN_MTU           48
  35 #define L2CAP_DEFAULT_FLUSH_TO          0xFFFF
  36 #define L2CAP_EFS_DEFAULT_FLUSH_TO      0xFFFFFFFF
  37 #define L2CAP_DEFAULT_TX_WINDOW         63
  38 #define L2CAP_DEFAULT_EXT_WINDOW        0x3FFF
  39 #define L2CAP_DEFAULT_MAX_TX            3
  40 #define L2CAP_DEFAULT_RETRANS_TO        2000    /* 2 seconds */
  41 #define L2CAP_DEFAULT_MONITOR_TO        12000   /* 12 seconds */
  42 #define L2CAP_DEFAULT_MAX_PDU_SIZE      1492    /* Sized for AMP packet */
  43 #define L2CAP_DEFAULT_ACK_TO            200
  44 #define L2CAP_DEFAULT_MAX_SDU_SIZE      0xFFFF
  45 #define L2CAP_DEFAULT_SDU_ITIME         0xFFFFFFFF
  46 #define L2CAP_DEFAULT_ACC_LAT           0xFFFFFFFF
  47 #define L2CAP_BREDR_MAX_PAYLOAD         1019    /* 3-DH5 packet */
  48 #define L2CAP_LE_MIN_MTU                23
  49
  50 #define L2CAP_DISC_TIMEOUT              msecs_to_jiffies(100)
  51 #define L2CAP_DISC_REJ_TIMEOUT          msecs_to_jiffies(5000)
  52 #define L2CAP_ENC_TIMEOUT               msecs_to_jiffies(5000)
  53 #define L2CAP_CONN_TIMEOUT              msecs_to_jiffies(40000)
  54 #define L2CAP_INFO_TIMEOUT              msecs_to_jiffies(4000)
  55 #define L2CAP_MOVE_TIMEOUT              msecs_to_jiffies(4000)
  56 #define L2CAP_MOVE_ERTX_TIMEOUT         msecs_to_jiffies(60000)
  57
  58 #define L2CAP_A2MP_DEFAULT_MTU          670
  59
  60 /* L2CAP socket address */
  61 struct sockaddr_l2 {
  62         sa_family_t     l2_family;
  63         __le16          l2_psm;
  64         bdaddr_t        l2_bdaddr;
  65         __le16          l2_cid;
  66         __u8            l2_bdaddr_type;
  67 };
  68
  69 /* L2CAP socket options */
  70 #define L2CAP_OPTIONS   0x01
  71 struct l2cap_options {
  72         __u16 omtu;
  73         __u16 imtu;
  74         __u16 flush_to;
  75         __u8  mode;
  76         __u8  fcs;
  77         __u8  max_tx;
  78         __u16 txwin_size;
  79 };
  80
  81 #define L2CAP_CONNINFO  0x02
  82 struct l2cap_conninfo {
  83         __u16 hci_handle;
  84         __u8  dev_class[3];
  85 };
  86
  87 #define L2CAP_LM        0x03
  88 #define L2CAP_LM_MASTER         0x0001
  89 #define L2CAP_LM_AUTH           0x0002
  90 #define L2CAP_LM_ENCRYPT        0x0004
  91 #define L2CAP_LM_TRUSTED        0x0008
  92 #define L2CAP_LM_RELIABLE       0x0010
  93 #define L2CAP_LM_SECURE         0x0020
  94
  95 /* L2CAP command codes */
  96 #define L2CAP_COMMAND_REJ       0x01
  97 #define L2CAP_CONN_REQ          0x02
  98 #define L2CAP_CONN_RSP          0x03
  99 #define L2CAP_CONF_REQ          0x04
 100 #define L2CAP_CONF_RSP          0x05
 101 #define L2CAP_DISCONN_REQ       0x06
 102 #define L2CAP_DISCONN_RSP       0x07
 103 #define L2CAP_ECHO_REQ          0x08
 104 #define L2CAP_ECHO_RSP          0x09
 105 #define L2CAP_INFO_REQ          0x0a
 106 #define L2CAP_INFO_RSP          0x0b
 107 #define L2CAP_CREATE_CHAN_REQ   0x0c
 108 #define L2CAP_CREATE_CHAN_RSP   0x0d
 109 #define L2CAP_MOVE_CHAN_REQ     0x0e
 110 #define L2CAP_MOVE_CHAN_RSP     0x0f
 111 #define L2CAP_MOVE_CHAN_CFM     0x10
 112 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
 113 #define L2CAP_CONN_PARAM_UPDATE_REQ     0x12
 114 #define L2CAP_CONN_PARAM_UPDATE_RSP     0x13
 115
 116 /* L2CAP extended feature mask */
 117 #define L2CAP_FEAT_FLOWCTL      0x00000001
 118 #define L2CAP_FEAT_RETRANS      0x00000002
 119 #define L2CAP_FEAT_BIDIR_QOS    0x00000004
 120 #define L2CAP_FEAT_ERTM         0x00000008
 121 #define L2CAP_FEAT_STREAMING    0x00000010
 122 #define L2CAP_FEAT_FCS          0x00000020
 123 #define L2CAP_FEAT_EXT_FLOW     0x00000040
 124 #define L2CAP_FEAT_FIXED_CHAN   0x00000080
 125 #define L2CAP_FEAT_EXT_WINDOW   0x00000100
 126 #define L2CAP_FEAT_UCD          0x00000200
 127
 128 /* L2CAP checksum option */
 129 #define L2CAP_FCS_NONE          0x00
 130 #define L2CAP_FCS_CRC16         0x01
 131
 132 /* L2CAP fixed channels */
 133 #define L2CAP_FC_L2CAP          0x02
 134 #define L2CAP_FC_CONNLESS       0x04
 135 #define L2CAP_FC_A2MP           0x08
 136
 137 /* L2CAP Control Field bit masks */
 138 #define L2CAP_CTRL_SAR                  0xC000
 139 #define L2CAP_CTRL_REQSEQ               0x3F00
 140 #define L2CAP_CTRL_TXSEQ                0x007E
 141 #define L2CAP_CTRL_SUPERVISE            0x000C
 142
 143 #define L2CAP_CTRL_RETRANS              0x0080
 144 #define L2CAP_CTRL_FINAL                0x0080
 145 #define L2CAP_CTRL_POLL                 0x0010
 146 #define L2CAP_CTRL_FRAME_TYPE           0x0001 /* I- or S-Frame */
 147
 148 #define L2CAP_CTRL_TXSEQ_SHIFT          1
 149 #define L2CAP_CTRL_SUPER_SHIFT          2
 150 #define L2CAP_CTRL_POLL_SHIFT           4
 151 #define L2CAP_CTRL_FINAL_SHIFT          7
 152 #define L2CAP_CTRL_REQSEQ_SHIFT         8
 153 #define L2CAP_CTRL_SAR_SHIFT            14
 154
 155 /* L2CAP Extended Control Field bit mask */
 156 #define L2CAP_EXT_CTRL_TXSEQ            0xFFFC0000
 157 #define L2CAP_EXT_CTRL_SAR              0x00030000
 158 #define L2CAP_EXT_CTRL_SUPERVISE        0x00030000
 159 #define L2CAP_EXT_CTRL_REQSEQ           0x0000FFFC
 160
 161 #define L2CAP_EXT_CTRL_POLL             0x00040000
 162 #define L2CAP_EXT_CTRL_FINAL            0x00000002
 163 #define L2CAP_EXT_CTRL_FRAME_TYPE       0x00000001 /* I- or S-Frame */
 164
 165 #define L2CAP_EXT_CTRL_FINAL_SHIFT      1
 166 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT     2
 167 #define L2CAP_EXT_CTRL_SAR_SHIFT        16
 168 #define L2CAP_EXT_CTRL_SUPER_SHIFT      16
 169 #define L2CAP_EXT_CTRL_POLL_SHIFT       18
 170 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT      18
 171
 172 /* L2CAP Supervisory Function */
 173 #define L2CAP_SUPER_RR          0x00
 174 #define L2CAP_SUPER_REJ         0x01
 175 #define L2CAP_SUPER_RNR         0x02
 176 #define L2CAP_SUPER_SREJ        0x03
 177
 178 /* L2CAP Segmentation and Reassembly */
 179 #define L2CAP_SAR_UNSEGMENTED   0x00
 180 #define L2CAP_SAR_START         0x01
 181 #define L2CAP_SAR_END           0x02
 182 #define L2CAP_SAR_CONTINUE      0x03
 183
 184 /* L2CAP Command rej. reasons */
 185 #define L2CAP_REJ_NOT_UNDERSTOOD        0x0000
 186 #define L2CAP_REJ_MTU_EXCEEDED          0x0001
 187 #define L2CAP_REJ_INVALID_CID           0x0002
 188
 189 /* L2CAP structures */
 190 struct l2cap_hdr {
 191         __le16     len;
 192         __le16     cid;
 193 } __packed;
 194 #define L2CAP_HDR_SIZE          4
 195 #define L2CAP_ENH_HDR_SIZE      6
 196 #define L2CAP_EXT_HDR_SIZE      8
 197
 198 #define L2CAP_FCS_SIZE          2
 199 #define L2CAP_SDULEN_SIZE       2
 200 #define L2CAP_PSMLEN_SIZE       2
 201 #define L2CAP_ENH_CTRL_SIZE     2
 202 #define L2CAP_EXT_CTRL_SIZE     4
 203
 204 struct l2cap_cmd_hdr {
 205         __u8       code;
 206         __u8       ident;
 207         __le16     len;
 208 } __packed;
 209 #define L2CAP_CMD_HDR_SIZE      4
 210
 211 struct l2cap_cmd_rej_unk {
 212         __le16     reason;
 213 } __packed;
 214
 215 struct l2cap_cmd_rej_mtu {
 216         __le16     reason;
 217         __le16     max_mtu;
 218 } __packed;
 219
 220 struct l2cap_cmd_rej_cid {
 221         __le16     reason;
 222         __le16     scid;
 223         __le16     dcid;
 224 } __packed;
 225
 226 struct l2cap_conn_req {
 227         __le16     psm;
 228         __le16     scid;
 229 } __packed;
 230
 231 struct l2cap_conn_rsp {
 232         __le16     dcid;
 233         __le16     scid;
 234         __le16     result;
 235         __le16     status;
 236 } __packed;
 237
 238 /* protocol/service multiplexer (PSM) */
 239 #define L2CAP_PSM_SDP           0x0001
 240 #define L2CAP_PSM_RFCOMM        0x0003
 241 #define L2CAP_PSM_3DSP          0x0021
 242
 243 /* channel indentifier */
 244 #define L2CAP_CID_SIGNALING     0x0001
 245 #define L2CAP_CID_CONN_LESS     0x0002
 246 #define L2CAP_CID_A2MP          0x0003
 247 #define L2CAP_CID_ATT           0x0004
 248 #define L2CAP_CID_LE_SIGNALING  0x0005
 249 #define L2CAP_CID_SMP           0x0006
 250 #define L2CAP_CID_DYN_START     0x0040
 251 #define L2CAP_CID_DYN_END       0xffff
 252
 253 /* connect/create channel results */
 254 #define L2CAP_CR_SUCCESS        0x0000
 255 #define L2CAP_CR_PEND           0x0001
 256 #define L2CAP_CR_BAD_PSM        0x0002
 257 #define L2CAP_CR_SEC_BLOCK      0x0003
 258 #define L2CAP_CR_NO_MEM         0x0004
 259 #define L2CAP_CR_BAD_AMP        0x0005
 260
 261 /* connect/create channel status */
 262 #define L2CAP_CS_NO_INFO        0x0000
 263 #define L2CAP_CS_AUTHEN_PEND    0x0001
 264 #define L2CAP_CS_AUTHOR_PEND    0x0002
 265
 266 struct l2cap_conf_req {
 267         __le16     dcid;
 268         __le16     flags;
 269         __u8       data[0];
 270 } __packed;
 271
 272 struct l2cap_conf_rsp {
 273         __le16     scid;
 274         __le16     flags;
 275         __le16     result;
 276         __u8       data[0];
 277 } __packed;
 278
 279 #define L2CAP_CONF_SUCCESS      0x0000
 280 #define L2CAP_CONF_UNACCEPT     0x0001
 281 #define L2CAP_CONF_REJECT       0x0002
 282 #define L2CAP_CONF_UNKNOWN      0x0003
 283 #define L2CAP_CONF_PENDING      0x0004
 284 #define L2CAP_CONF_EFS_REJECT   0x0005
 285
 286 /* configuration req/rsp continuation flag */
 287 #define L2CAP_CONF_FLAG_CONTINUATION    0x0001
 288
 289 struct l2cap_conf_opt {
 290         __u8       type;
 291         __u8       len;
 292         __u8       val[0];
 293 } __packed;
 294 #define L2CAP_CONF_OPT_SIZE     2
 295
 296 #define L2CAP_CONF_HINT         0x80
 297 #define L2CAP_CONF_MASK         0x7f
 298
 299 #define L2CAP_CONF_MTU          0x01
 300 #define L2CAP_CONF_FLUSH_TO     0x02
 301 #define L2CAP_CONF_QOS          0x03
 302 #define L2CAP_CONF_RFC          0x04
 303 #define L2CAP_CONF_FCS          0x05
 304 #define L2CAP_CONF_EFS          0x06
 305 #define L2CAP_CONF_EWS          0x07
 306
 307 #define L2CAP_CONF_MAX_SIZE     22
 308
 309 struct l2cap_conf_rfc {
 310         __u8       mode;
 311         __u8       txwin_size;
 312         __u8       max_transmit;
 313         __le16     retrans_timeout;
 314         __le16     monitor_timeout;
 315         __le16     max_pdu_size;
 316 } __packed;
 317
 318 #define L2CAP_MODE_BASIC        0x00
 319 #define L2CAP_MODE_RETRANS      0x01
 320 #define L2CAP_MODE_FLOWCTL      0x02
 321 #define L2CAP_MODE_ERTM         0x03
 322 #define L2CAP_MODE_STREAMING    0x04
 323
 324 struct l2cap_conf_efs {
 325         __u8    id;
 326         __u8    stype;
 327         __le16  msdu;
 328         __le32  sdu_itime;
 329         __le32  acc_lat;
 330         __le32  flush_to;
 331 } __packed;
 332
 333 #define L2CAP_SERV_NOTRAFIC     0x00
 334 #define L2CAP_SERV_BESTEFFORT   0x01
 335 #define L2CAP_SERV_GUARANTEED   0x02
 336
 337 #define L2CAP_BESTEFFORT_ID     0x01
 338
 339 struct l2cap_disconn_req {
 340         __le16     dcid;
 341         __le16     scid;
 342 } __packed;
 343
 344 struct l2cap_disconn_rsp {
 345         __le16     dcid;
 346         __le16     scid;
 347 } __packed;
 348
 349 struct l2cap_info_req {
 350         __le16      type;
 351 } __packed;
 352
 353 struct l2cap_info_rsp {
 354         __le16      type;
 355         __le16      result;
 356         __u8        data[0];
 357 } __packed;
 358
 359 struct l2cap_create_chan_req {
 360         __le16      psm;
 361         __le16      scid;
 362         __u8        amp_id;
 363 } __packed;
 364
 365 struct l2cap_create_chan_rsp {
 366         __le16      dcid;
 367         __le16      scid;
 368         __le16      result;
 369         __le16      status;
 370 } __packed;
 371
 372 struct l2cap_move_chan_req {
 373         __le16      icid;
 374         __u8        dest_amp_id;
 375 } __packed;
 376
 377 struct l2cap_move_chan_rsp {
 378         __le16      icid;
 379         __le16      result;
 380 } __packed;
 381
 382 #define L2CAP_MR_SUCCESS        0x0000
 383 #define L2CAP_MR_PEND           0x0001
 384 #define L2CAP_MR_BAD_ID         0x0002
 385 #define L2CAP_MR_SAME_ID        0x0003
 386 #define L2CAP_MR_NOT_SUPP       0x0004
 387 #define L2CAP_MR_COLLISION      0x0005
 388 #define L2CAP_MR_NOT_ALLOWED    0x0006
 389
 390 struct l2cap_move_chan_cfm {
 391         __le16      icid;
 392         __le16      result;
 393 } __packed;
 394
 395 #define L2CAP_MC_CONFIRMED      0x0000
 396 #define L2CAP_MC_UNCONFIRMED    0x0001
 397
 398 struct l2cap_move_chan_cfm_rsp {
 399         __le16      icid;
 400 } __packed;
 401
 402 /* info type */
 403 #define L2CAP_IT_CL_MTU         0x0001
 404 #define L2CAP_IT_FEAT_MASK      0x0002
 405 #define L2CAP_IT_FIXED_CHAN     0x0003
 406
 407 /* info result */
 408 #define L2CAP_IR_SUCCESS        0x0000
 409 #define L2CAP_IR_NOTSUPP        0x0001
 410
 411 struct l2cap_conn_param_update_req {
 412         __le16      min;
 413         __le16      max;
 414         __le16      latency;
 415         __le16      to_multiplier;
 416 } __packed;
 417
 418 struct l2cap_conn_param_update_rsp {
 419         __le16      result;
 420 } __packed;
 421
 422 /* Connection Parameters result */
 423 #define L2CAP_CONN_PARAM_ACCEPTED       0x0000
 424 #define L2CAP_CONN_PARAM_REJECTED       0x0001
 425
 426 /* ----- L2CAP channels and connections ----- */
 427 struct l2cap_seq_list {
 428         __u16   head;
 429         __u16   tail;
 430         __u16   mask;
 431         __u16   *list;
 432 };
 433
 434 #define L2CAP_SEQ_LIST_CLEAR    0xFFFF
 435 #define L2CAP_SEQ_LIST_TAIL     0x8000
 436
 437 struct l2cap_chan {
 438         struct sock *sk;
 439
 440         struct l2cap_conn       *conn;
 441         struct hci_conn         *hs_hcon;
 442         struct hci_chan         *hs_hchan;
 443         struct kref     kref;
 444
 445         __u8            state;
 446
 447         bdaddr_t        dst;
 448         __u8            dst_type;
 449         bdaddr_t        src;
 450         __u8            src_type;
 451         __le16          psm;
 452         __le16          sport;
 453         __u16           dcid;
 454         __u16           scid;
 455
 456         __u16           imtu;
 457         __u16           omtu;
 458         __u16           flush_to;
 459         __u8            mode;
 460         __u8            chan_type;
 461         __u8            chan_policy;
 462
 463         __u8            sec_level;
 464
 465         __u8            ident;
 466
 467         __u8            conf_req[64];
 468         __u8            conf_len;
 469         __u8            num_conf_req;
 470         __u8            num_conf_rsp;
 471
 472         __u8            fcs;
 473
 474         __u16           tx_win;
 475         __u16           tx_win_max;
 476         __u16           ack_win;
 477         __u8            max_tx;
 478         __u16           retrans_timeout;
 479         __u16           monitor_timeout;
 480         __u16           mps;
 481
 482         __u8            tx_state;
 483         __u8            rx_state;
 484
 485         unsigned long   conf_state;
 486         unsigned long   conn_state;
 487         unsigned long   flags;
 488
 489         __u8            remote_amp_id;
 490         __u8            local_amp_id;
 491         __u8            move_id;
 492         __u8            move_state;
 493         __u8            move_role;
 494
 495         __u16           next_tx_seq;
 496         __u16           expected_ack_seq;
 497         __u16           expected_tx_seq;
 498         __u16           buffer_seq;
 499         __u16           srej_save_reqseq;
 500         __u16           last_acked_seq;
 501         __u16           frames_sent;
 502         __u16           unacked_frames;
 503         __u8            retry_count;
 504         __u16           sdu_len;
 505         struct sk_buff  *sdu;
 506         struct sk_buff  *sdu_last_frag;
 507
 508         __u16           remote_tx_win;
 509         __u8            remote_max_tx;
 510         __u16           remote_mps;
 511
 512         __u8            local_id;
 513         __u8            local_stype;
 514         __u16           local_msdu;
 515         __u32           local_sdu_itime;
 516         __u32           local_acc_lat;
 517         __u32           local_flush_to;
 518
 519         __u8            remote_id;
 520         __u8            remote_stype;
 521         __u16           remote_msdu;
 522         __u32           remote_sdu_itime;
 523         __u32           remote_acc_lat;
 524         __u32           remote_flush_to;
 525
 526         struct delayed_work     chan_timer;
 527         struct delayed_work     retrans_timer;
 528         struct delayed_work     monitor_timer;
 529         struct delayed_work     ack_timer;
 530
 531         struct sk_buff          *tx_send_head;
 532         struct sk_buff_head     tx_q;
 533         struct sk_buff_head     srej_q;
 534         struct l2cap_seq_list   srej_list;
 535         struct l2cap_seq_list   retrans_list;
 536
 537         struct list_head        list;
 538         struct list_head        global_l;
 539
 540         void                    *data;
 541         struct l2cap_ops        *ops;
 542         struct mutex            lock;
 543 };
 544
 545 struct l2cap_ops {
 546         char                    *name;
 547
 548         struct l2cap_chan       *(*new_connection) (struct l2cap_chan *chan);
 549         int                     (*recv) (struct l2cap_chan * chan,
 550                                          struct sk_buff *skb);
 551         void                    (*teardown) (struct l2cap_chan *chan, int err);
 552         void                    (*close) (struct l2cap_chan *chan);
 553         void                    (*state_change) (struct l2cap_chan *chan,
 554                                                  int state, int err);
 555         void                    (*ready) (struct l2cap_chan *chan);
 556         void                    (*defer) (struct l2cap_chan *chan);
 557         void                    (*resume) (struct l2cap_chan *chan);
 558         long                    (*get_sndtimeo) (struct l2cap_chan *chan);
 559         struct sk_buff          *(*alloc_skb) (struct l2cap_chan *chan,
 560                                                unsigned long len, int nb);
 561 };
 562
 563 struct l2cap_conn {
 564         struct hci_conn         *hcon;
 565         struct hci_chan         *hchan;
 566
 567         unsigned int            mtu;
 568
 569         __u32                   feat_mask;
 570         __u8                    fixed_chan_mask;
 571         bool                    hs_enabled;
 572
 573         __u8                    info_state;
 574         __u8                    info_ident;
 575
 576         struct delayed_work     info_timer;
 577
 578         spinlock_t              lock;
 579
 580         struct sk_buff          *rx_skb;
 581         __u32                   rx_len;
 582         __u8                    tx_ident;
 583
 584         __u8                    disc_reason;
 585
 586         struct delayed_work     security_timer;
 587         struct smp_chan         *smp_chan;
 588
 589         struct list_head        chan_l;
 590         struct mutex            chan_lock;
 591         struct kref             ref;
 592         struct list_head        users;
 593 };
 594
 595 struct l2cap_user {
 596         struct list_head list;
 597         int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
 598         void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
 599 };
 600
 601 #define L2CAP_INFO_CL_MTU_REQ_SENT      0x01
 602 #define L2CAP_INFO_FEAT_MASK_REQ_SENT   0x04
 603 #define L2CAP_INFO_FEAT_MASK_REQ_DONE   0x08
 604
 605 #define L2CAP_CHAN_RAW                  1
 606 #define L2CAP_CHAN_CONN_LESS            2
 607 #define L2CAP_CHAN_CONN_ORIENTED        3
 608 #define L2CAP_CHAN_CONN_FIX_A2MP        4
 609
 610 /* ----- L2CAP socket info ----- */
 611 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
 612
 613 struct l2cap_pinfo {
 614         struct bt_sock          bt;
 615         struct l2cap_chan       *chan;
 616         struct sk_buff          *rx_busy_skb;
 617 };
 618
 619 enum {
 620         CONF_REQ_SENT,
 621         CONF_INPUT_DONE,
 622         CONF_OUTPUT_DONE,
 623         CONF_MTU_DONE,
 624         CONF_MODE_DONE,
 625         CONF_CONNECT_PEND,
 626         CONF_RECV_NO_FCS,
 627         CONF_STATE2_DEVICE,
 628         CONF_EWS_RECV,
 629         CONF_LOC_CONF_PEND,
 630         CONF_REM_CONF_PEND,
 631         CONF_NOT_COMPLETE,
 632 };
 633
 634 #define L2CAP_CONF_MAX_CONF_REQ 2
 635 #define L2CAP_CONF_MAX_CONF_RSP 2
 636
 637 enum {
 638         CONN_SREJ_SENT,
 639         CONN_WAIT_F,
 640         CONN_SREJ_ACT,
 641         CONN_SEND_PBIT,
 642         CONN_REMOTE_BUSY,
 643         CONN_LOCAL_BUSY,
 644         CONN_REJ_ACT,
 645         CONN_SEND_FBIT,
 646         CONN_RNR_SENT,
 647 };
 648
 649 /* Definitions for flags in l2cap_chan */
 650 enum {
 651         FLAG_ROLE_SWITCH,
 652         FLAG_FORCE_ACTIVE,
 653         FLAG_FORCE_RELIABLE,
 654         FLAG_FLUSHABLE,
 655         FLAG_EXT_CTRL,
 656         FLAG_EFS_ENABLE,
 657         FLAG_DEFER_SETUP,
 658 };
 659
 660 enum {
 661         L2CAP_TX_STATE_XMIT,
 662         L2CAP_TX_STATE_WAIT_F,
 663 };
 664
 665 enum {
 666         L2CAP_RX_STATE_RECV,
 667         L2CAP_RX_STATE_SREJ_SENT,
 668         L2CAP_RX_STATE_MOVE,
 669         L2CAP_RX_STATE_WAIT_P,
 670         L2CAP_RX_STATE_WAIT_F,
 671 };
 672
 673 enum {
 674         L2CAP_TXSEQ_EXPECTED,
 675         L2CAP_TXSEQ_EXPECTED_SREJ,
 676         L2CAP_TXSEQ_UNEXPECTED,
 677         L2CAP_TXSEQ_UNEXPECTED_SREJ,
 678         L2CAP_TXSEQ_DUPLICATE,
 679         L2CAP_TXSEQ_DUPLICATE_SREJ,
 680         L2CAP_TXSEQ_INVALID,
 681         L2CAP_TXSEQ_INVALID_IGNORE,
 682 };
 683
 684 enum {
 685         L2CAP_EV_DATA_REQUEST,
 686         L2CAP_EV_LOCAL_BUSY_DETECTED,
 687         L2CAP_EV_LOCAL_BUSY_CLEAR,
 688         L2CAP_EV_RECV_REQSEQ_AND_FBIT,
 689         L2CAP_EV_RECV_FBIT,
 690         L2CAP_EV_RETRANS_TO,
 691         L2CAP_EV_MONITOR_TO,
 692         L2CAP_EV_EXPLICIT_POLL,
 693         L2CAP_EV_RECV_IFRAME,
 694         L2CAP_EV_RECV_RR,
 695         L2CAP_EV_RECV_REJ,
 696         L2CAP_EV_RECV_RNR,
 697         L2CAP_EV_RECV_SREJ,
 698         L2CAP_EV_RECV_FRAME,
 699 };
 700
 701 enum {
 702         L2CAP_MOVE_ROLE_NONE,
 703         L2CAP_MOVE_ROLE_INITIATOR,
 704         L2CAP_MOVE_ROLE_RESPONDER,
 705 };
 706
 707 enum {
 708         L2CAP_MOVE_STABLE,
 709         L2CAP_MOVE_WAIT_REQ,
 710         L2CAP_MOVE_WAIT_RSP,
 711         L2CAP_MOVE_WAIT_RSP_SUCCESS,
 712         L2CAP_MOVE_WAIT_CONFIRM,
 713         L2CAP_MOVE_WAIT_CONFIRM_RSP,
 714         L2CAP_MOVE_WAIT_LOGICAL_COMP,
 715         L2CAP_MOVE_WAIT_LOGICAL_CFM,
 716         L2CAP_MOVE_WAIT_LOCAL_BUSY,
 717         L2CAP_MOVE_WAIT_PREPARE,
 718 };
 719
 720 void l2cap_chan_hold(struct l2cap_chan *c);
 721 void l2cap_chan_put(struct l2cap_chan *c);
 722
 723 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
 724 {
 725         mutex_lock(&chan->lock);
 726 }
 727
 728 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
 729 {
 730         mutex_unlock(&chan->lock);
 731 }
 732
 733 static inline void l2cap_set_timer(struct l2cap_chan *chan,
 734                                    struct delayed_work *work, long timeout)
 735 {
 736         BT_DBG("chan %p state %s timeout %ld", chan,
 737                state_to_string(chan->state), timeout);
 738
 739         /* If delayed work cancelled do not hold(chan)
 740            since it is already done with previous set_timer */
 741         if (!cancel_delayed_work(work))
 742                 l2cap_chan_hold(chan);
 743
 744         schedule_delayed_work(work, timeout);
 745 }
 746
 747 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
 748                                      struct delayed_work *work)
 749 {
 750         bool ret;
 751
 752         /* put(chan) if delayed work cancelled otherwise it
 753            is done in delayed work function */
 754         ret = cancel_delayed_work(work);
 755         if (ret)
 756                 l2cap_chan_put(chan);
 757
 758         return ret;
 759 }
 760
 761 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
 762 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
 763 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
 764 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
 765 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
 766                 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
 767 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
 768
 769 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
 770 {
 771         if (seq1 >= seq2)
 772                 return seq1 - seq2;
 773         else
 774                 return chan->tx_win_max + 1 - seq2 + seq1;
 775 }
 776
 777 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
 778 {
 779         return (seq + 1) % (chan->tx_win_max + 1);
 780 }
 781
 782 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
 783 {
 784         return NULL;
 785 }
 786
 787 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
 788 {
 789 }
 790
 791 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
 792 {
 793 }
 794
 795 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
 796 {
 797 }
 798
 799 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
 800 {
 801         return 0;
 802 }
 803
 804 extern bool disable_ertm;
 805
 806 int l2cap_init_sockets(void);
 807 void l2cap_cleanup_sockets(void);
 808 bool l2cap_is_socket(struct socket *sock);
 809
 810 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
 811 int __l2cap_wait_ack(struct sock *sk);
 812
 813 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
 814 int l2cap_add_scid(struct l2cap_chan *chan,  __u16 scid);
 815
 816 struct l2cap_chan *l2cap_chan_create(void);
 817 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
 818 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
 819                        bdaddr_t *dst, u8 dst_type);
 820 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
 821                                                                 u32 priority);
 822 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
 823 int l2cap_chan_check_security(struct l2cap_chan *chan);
 824 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
 825 int l2cap_ertm_init(struct l2cap_chan *chan);
 826 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
 827 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
 828 void l2cap_chan_del(struct l2cap_chan *chan, int err);
 829 void l2cap_send_conn_req(struct l2cap_chan *chan);
 830 void l2cap_move_start(struct l2cap_chan *chan);
 831 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
 832                        u8 status);
 833 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
 834
 835 void l2cap_conn_get(struct l2cap_conn *conn);
 836 void l2cap_conn_put(struct l2cap_conn *conn);
 837
 838 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
 839 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
 840
 841 #endif /* __L2CAP_H */