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_A2MP           0x08
 135
 136 /* L2CAP Control Field bit masks */
 137 #define L2CAP_CTRL_SAR                  0xC000
 138 #define L2CAP_CTRL_REQSEQ               0x3F00
 139 #define L2CAP_CTRL_TXSEQ                0x007E
 140 #define L2CAP_CTRL_SUPERVISE            0x000C
 141
 142 #define L2CAP_CTRL_RETRANS              0x0080
 143 #define L2CAP_CTRL_FINAL                0x0080
 144 #define L2CAP_CTRL_POLL                 0x0010
 145 #define L2CAP_CTRL_FRAME_TYPE           0x0001 /* I- or S-Frame */
 146
 147 #define L2CAP_CTRL_TXSEQ_SHIFT          1
 148 #define L2CAP_CTRL_SUPER_SHIFT          2
 149 #define L2CAP_CTRL_POLL_SHIFT           4
 150 #define L2CAP_CTRL_FINAL_SHIFT          7
 151 #define L2CAP_CTRL_REQSEQ_SHIFT         8
 152 #define L2CAP_CTRL_SAR_SHIFT            14
 153
 154 /* L2CAP Extended Control Field bit mask */
 155 #define L2CAP_EXT_CTRL_TXSEQ            0xFFFC0000
 156 #define L2CAP_EXT_CTRL_SAR              0x00030000
 157 #define L2CAP_EXT_CTRL_SUPERVISE        0x00030000
 158 #define L2CAP_EXT_CTRL_REQSEQ           0x0000FFFC
 159
 160 #define L2CAP_EXT_CTRL_POLL             0x00040000
 161 #define L2CAP_EXT_CTRL_FINAL            0x00000002
 162 #define L2CAP_EXT_CTRL_FRAME_TYPE       0x00000001 /* I- or S-Frame */
 163
 164 #define L2CAP_EXT_CTRL_FINAL_SHIFT      1
 165 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT     2
 166 #define L2CAP_EXT_CTRL_SAR_SHIFT        16
 167 #define L2CAP_EXT_CTRL_SUPER_SHIFT      16
 168 #define L2CAP_EXT_CTRL_POLL_SHIFT       18
 169 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT      18
 170
 171 /* L2CAP Supervisory Function */
 172 #define L2CAP_SUPER_RR          0x00
 173 #define L2CAP_SUPER_REJ         0x01
 174 #define L2CAP_SUPER_RNR         0x02
 175 #define L2CAP_SUPER_SREJ        0x03
 176
 177 /* L2CAP Segmentation and Reassembly */
 178 #define L2CAP_SAR_UNSEGMENTED   0x00
 179 #define L2CAP_SAR_START         0x01
 180 #define L2CAP_SAR_END           0x02
 181 #define L2CAP_SAR_CONTINUE      0x03
 182
 183 /* L2CAP Command rej. reasons */
 184 #define L2CAP_REJ_NOT_UNDERSTOOD        0x0000
 185 #define L2CAP_REJ_MTU_EXCEEDED          0x0001
 186 #define L2CAP_REJ_INVALID_CID           0x0002
 187
 188 /* L2CAP structures */
 189 struct l2cap_hdr {
 190         __le16     len;
 191         __le16     cid;
 192 } __packed;
 193 #define L2CAP_HDR_SIZE          4
 194 #define L2CAP_ENH_HDR_SIZE      6
 195 #define L2CAP_EXT_HDR_SIZE      8
 196
 197 #define L2CAP_FCS_SIZE          2
 198 #define L2CAP_SDULEN_SIZE       2
 199 #define L2CAP_PSMLEN_SIZE       2
 200 #define L2CAP_ENH_CTRL_SIZE     2
 201 #define L2CAP_EXT_CTRL_SIZE     4
 202
 203 struct l2cap_cmd_hdr {
 204         __u8       code;
 205         __u8       ident;
 206         __le16     len;
 207 } __packed;
 208 #define L2CAP_CMD_HDR_SIZE      4
 209
 210 struct l2cap_cmd_rej_unk {
 211         __le16     reason;
 212 } __packed;
 213
 214 struct l2cap_cmd_rej_mtu {
 215         __le16     reason;
 216         __le16     max_mtu;
 217 } __packed;
 218
 219 struct l2cap_cmd_rej_cid {
 220         __le16     reason;
 221         __le16     scid;
 222         __le16     dcid;
 223 } __packed;
 224
 225 struct l2cap_conn_req {
 226         __le16     psm;
 227         __le16     scid;
 228 } __packed;
 229
 230 struct l2cap_conn_rsp {
 231         __le16     dcid;
 232         __le16     scid;
 233         __le16     result;
 234         __le16     status;
 235 } __packed;
 236
 237 /* protocol/service multiplexer (PSM) */
 238 #define L2CAP_PSM_SDP           0x0001
 239 #define L2CAP_PSM_RFCOMM        0x0003
 240
 241 /* channel indentifier */
 242 #define L2CAP_CID_SIGNALING     0x0001
 243 #define L2CAP_CID_CONN_LESS     0x0002
 244 #define L2CAP_CID_A2MP          0x0003
 245 #define L2CAP_CID_LE_DATA       0x0004
 246 #define L2CAP_CID_LE_SIGNALING  0x0005
 247 #define L2CAP_CID_SMP           0x0006
 248 #define L2CAP_CID_DYN_START     0x0040
 249 #define L2CAP_CID_DYN_END       0xffff
 250
 251 /* connect/create channel results */
 252 #define L2CAP_CR_SUCCESS        0x0000
 253 #define L2CAP_CR_PEND           0x0001
 254 #define L2CAP_CR_BAD_PSM        0x0002
 255 #define L2CAP_CR_SEC_BLOCK      0x0003
 256 #define L2CAP_CR_NO_MEM         0x0004
 257 #define L2CAP_CR_BAD_AMP        0x0005
 258
 259 /* connect/create channel status */
 260 #define L2CAP_CS_NO_INFO        0x0000
 261 #define L2CAP_CS_AUTHEN_PEND    0x0001
 262 #define L2CAP_CS_AUTHOR_PEND    0x0002
 263
 264 struct l2cap_conf_req {
 265         __le16     dcid;
 266         __le16     flags;
 267         __u8       data[0];
 268 } __packed;
 269
 270 struct l2cap_conf_rsp {
 271         __le16     scid;
 272         __le16     flags;
 273         __le16     result;
 274         __u8       data[0];
 275 } __packed;
 276
 277 #define L2CAP_CONF_SUCCESS      0x0000
 278 #define L2CAP_CONF_UNACCEPT     0x0001
 279 #define L2CAP_CONF_REJECT       0x0002
 280 #define L2CAP_CONF_UNKNOWN      0x0003
 281 #define L2CAP_CONF_PENDING      0x0004
 282 #define L2CAP_CONF_EFS_REJECT   0x0005
 283
 284 /* configuration req/rsp continuation flag */
 285 #define L2CAP_CONF_FLAG_CONTINUATION    0x0001
 286
 287 struct l2cap_conf_opt {
 288         __u8       type;
 289         __u8       len;
 290         __u8       val[0];
 291 } __packed;
 292 #define L2CAP_CONF_OPT_SIZE     2
 293
 294 #define L2CAP_CONF_HINT         0x80
 295 #define L2CAP_CONF_MASK         0x7f
 296
 297 #define L2CAP_CONF_MTU          0x01
 298 #define L2CAP_CONF_FLUSH_TO     0x02
 299 #define L2CAP_CONF_QOS          0x03
 300 #define L2CAP_CONF_RFC          0x04
 301 #define L2CAP_CONF_FCS          0x05
 302 #define L2CAP_CONF_EFS          0x06
 303 #define L2CAP_CONF_EWS          0x07
 304
 305 #define L2CAP_CONF_MAX_SIZE     22
 306
 307 struct l2cap_conf_rfc {
 308         __u8       mode;
 309         __u8       txwin_size;
 310         __u8       max_transmit;
 311         __le16     retrans_timeout;
 312         __le16     monitor_timeout;
 313         __le16     max_pdu_size;
 314 } __packed;
 315
 316 #define L2CAP_MODE_BASIC        0x00
 317 #define L2CAP_MODE_RETRANS      0x01
 318 #define L2CAP_MODE_FLOWCTL      0x02
 319 #define L2CAP_MODE_ERTM         0x03
 320 #define L2CAP_MODE_STREAMING    0x04
 321
 322 struct l2cap_conf_efs {
 323         __u8    id;
 324         __u8    stype;
 325         __le16  msdu;
 326         __le32  sdu_itime;
 327         __le32  acc_lat;
 328         __le32  flush_to;
 329 } __packed;
 330
 331 #define L2CAP_SERV_NOTRAFIC     0x00
 332 #define L2CAP_SERV_BESTEFFORT   0x01
 333 #define L2CAP_SERV_GUARANTEED   0x02
 334
 335 #define L2CAP_BESTEFFORT_ID     0x01
 336
 337 struct l2cap_disconn_req {
 338         __le16     dcid;
 339         __le16     scid;
 340 } __packed;
 341
 342 struct l2cap_disconn_rsp {
 343         __le16     dcid;
 344         __le16     scid;
 345 } __packed;
 346
 347 struct l2cap_info_req {
 348         __le16      type;
 349 } __packed;
 350
 351 struct l2cap_info_rsp {
 352         __le16      type;
 353         __le16      result;
 354         __u8        data[0];
 355 } __packed;
 356
 357 struct l2cap_create_chan_req {
 358         __le16      psm;
 359         __le16      scid;
 360         __u8        amp_id;
 361 } __packed;
 362
 363 struct l2cap_create_chan_rsp {
 364         __le16      dcid;
 365         __le16      scid;
 366         __le16      result;
 367         __le16      status;
 368 } __packed;
 369
 370 struct l2cap_move_chan_req {
 371         __le16      icid;
 372         __u8        dest_amp_id;
 373 } __packed;
 374
 375 struct l2cap_move_chan_rsp {
 376         __le16      icid;
 377         __le16      result;
 378 } __packed;
 379
 380 #define L2CAP_MR_SUCCESS        0x0000
 381 #define L2CAP_MR_PEND           0x0001
 382 #define L2CAP_MR_BAD_ID         0x0002
 383 #define L2CAP_MR_SAME_ID        0x0003
 384 #define L2CAP_MR_NOT_SUPP       0x0004
 385 #define L2CAP_MR_COLLISION      0x0005
 386 #define L2CAP_MR_NOT_ALLOWED    0x0006
 387
 388 struct l2cap_move_chan_cfm {
 389         __le16      icid;
 390         __le16      result;
 391 } __packed;
 392
 393 #define L2CAP_MC_CONFIRMED      0x0000
 394 #define L2CAP_MC_UNCONFIRMED    0x0001
 395
 396 struct l2cap_move_chan_cfm_rsp {
 397         __le16      icid;
 398 } __packed;
 399
 400 /* info type */
 401 #define L2CAP_IT_CL_MTU         0x0001
 402 #define L2CAP_IT_FEAT_MASK      0x0002
 403 #define L2CAP_IT_FIXED_CHAN     0x0003
 404
 405 /* info result */
 406 #define L2CAP_IR_SUCCESS        0x0000
 407 #define L2CAP_IR_NOTSUPP        0x0001
 408
 409 struct l2cap_conn_param_update_req {
 410         __le16      min;
 411         __le16      max;
 412         __le16      latency;
 413         __le16      to_multiplier;
 414 } __packed;
 415
 416 struct l2cap_conn_param_update_rsp {
 417         __le16      result;
 418 } __packed;
 419
 420 /* Connection Parameters result */
 421 #define L2CAP_CONN_PARAM_ACCEPTED       0x0000
 422 #define L2CAP_CONN_PARAM_REJECTED       0x0001
 423
 424 /* ----- L2CAP channels and connections ----- */
 425 struct l2cap_seq_list {
 426         __u16   head;
 427         __u16   tail;
 428         __u16   mask;
 429         __u16   *list;
 430 };
 431
 432 #define L2CAP_SEQ_LIST_CLEAR    0xFFFF
 433 #define L2CAP_SEQ_LIST_TAIL     0x8000
 434
 435 struct l2cap_chan {
 436         struct sock *sk;
 437
 438         struct l2cap_conn       *conn;
 439         struct hci_conn         *hs_hcon;
 440         struct hci_chan         *hs_hchan;
 441         struct kref     kref;
 442
 443         __u8            state;
 444
 445         __le16          psm;
 446         __u16           dcid;
 447         __u16           scid;
 448
 449         __u16           imtu;
 450         __u16           omtu;
 451         __u16           flush_to;
 452         __u8            mode;
 453         __u8            chan_type;
 454         __u8            chan_policy;
 455
 456         __le16          sport;
 457
 458         __u8            sec_level;
 459
 460         __u8            ident;
 461
 462         __u8            conf_req[64];
 463         __u8            conf_len;
 464         __u8            num_conf_req;
 465         __u8            num_conf_rsp;
 466
 467         __u8            fcs;
 468
 469         __u16           tx_win;
 470         __u16           tx_win_max;
 471         __u16           ack_win;
 472         __u8            max_tx;
 473         __u16           retrans_timeout;
 474         __u16           monitor_timeout;
 475         __u16           mps;
 476
 477         __u8            tx_state;
 478         __u8            rx_state;
 479
 480         unsigned long   conf_state;
 481         unsigned long   conn_state;
 482         unsigned long   flags;
 483
 484         __u8            remote_amp_id;
 485         __u8            local_amp_id;
 486         __u8            move_id;
 487         __u8            move_state;
 488         __u8            move_role;
 489
 490         __u16           next_tx_seq;
 491         __u16           expected_ack_seq;
 492         __u16           expected_tx_seq;
 493         __u16           buffer_seq;
 494         __u16           srej_save_reqseq;
 495         __u16           last_acked_seq;
 496         __u16           frames_sent;
 497         __u16           unacked_frames;
 498         __u8            retry_count;
 499         __u16           sdu_len;
 500         struct sk_buff  *sdu;
 501         struct sk_buff  *sdu_last_frag;
 502
 503         __u16           remote_tx_win;
 504         __u8            remote_max_tx;
 505         __u16           remote_mps;
 506
 507         __u8            local_id;
 508         __u8            local_stype;
 509         __u16           local_msdu;
 510         __u32           local_sdu_itime;
 511         __u32           local_acc_lat;
 512         __u32           local_flush_to;
 513
 514         __u8            remote_id;
 515         __u8            remote_stype;
 516         __u16           remote_msdu;
 517         __u32           remote_sdu_itime;
 518         __u32           remote_acc_lat;
 519         __u32           remote_flush_to;
 520
 521         struct delayed_work     chan_timer;
 522         struct delayed_work     retrans_timer;
 523         struct delayed_work     monitor_timer;
 524         struct delayed_work     ack_timer;
 525
 526         struct sk_buff          *tx_send_head;
 527         struct sk_buff_head     tx_q;
 528         struct sk_buff_head     srej_q;
 529         struct l2cap_seq_list   srej_list;
 530         struct l2cap_seq_list   retrans_list;
 531
 532         struct list_head        list;
 533         struct list_head        global_l;
 534
 535         void                    *data;
 536         struct l2cap_ops        *ops;
 537         struct mutex            lock;
 538 };
 539
 540 struct l2cap_ops {
 541         char                    *name;
 542
 543         struct l2cap_chan       *(*new_connection) (struct l2cap_chan *chan);
 544         int                     (*recv) (struct l2cap_chan * chan,
 545                                          struct sk_buff *skb);
 546         void                    (*teardown) (struct l2cap_chan *chan, int err);
 547         void                    (*close) (struct l2cap_chan *chan);
 548         void                    (*state_change) (struct l2cap_chan *chan,
 549                                                  int state);
 550         void                    (*ready) (struct l2cap_chan *chan);
 551         void                    (*defer) (struct l2cap_chan *chan);
 552         struct sk_buff          *(*alloc_skb) (struct l2cap_chan *chan,
 553                                                unsigned long len, int nb);
 554 };
 555
 556 struct l2cap_conn {
 557         struct hci_conn         *hcon;
 558         struct hci_chan         *hchan;
 559
 560         bdaddr_t                *dst;
 561         bdaddr_t                *src;
 562
 563         unsigned int            mtu;
 564
 565         __u32                   feat_mask;
 566         __u8                    fixed_chan_mask;
 567
 568         __u8                    info_state;
 569         __u8                    info_ident;
 570
 571         struct delayed_work     info_timer;
 572
 573         spinlock_t              lock;
 574
 575         struct sk_buff          *rx_skb;
 576         __u32                   rx_len;
 577         __u8                    tx_ident;
 578
 579         __u8                    disc_reason;
 580
 581         struct delayed_work     security_timer;
 582         struct smp_chan         *smp_chan;
 583
 584         struct list_head        chan_l;
 585         struct mutex            chan_lock;
 586 };
 587
 588 #define L2CAP_INFO_CL_MTU_REQ_SENT      0x01
 589 #define L2CAP_INFO_FEAT_MASK_REQ_SENT   0x04
 590 #define L2CAP_INFO_FEAT_MASK_REQ_DONE   0x08
 591
 592 #define L2CAP_CHAN_RAW                  1
 593 #define L2CAP_CHAN_CONN_LESS            2
 594 #define L2CAP_CHAN_CONN_ORIENTED        3
 595 #define L2CAP_CHAN_CONN_FIX_A2MP        4
 596
 597 /* ----- L2CAP socket info ----- */
 598 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
 599
 600 struct l2cap_pinfo {
 601         struct bt_sock          bt;
 602         struct l2cap_chan       *chan;
 603         struct sk_buff          *rx_busy_skb;
 604 };
 605
 606 enum {
 607         CONF_REQ_SENT,
 608         CONF_INPUT_DONE,
 609         CONF_OUTPUT_DONE,
 610         CONF_MTU_DONE,
 611         CONF_MODE_DONE,
 612         CONF_CONNECT_PEND,
 613         CONF_RECV_NO_FCS,
 614         CONF_STATE2_DEVICE,
 615         CONF_EWS_RECV,
 616         CONF_LOC_CONF_PEND,
 617         CONF_REM_CONF_PEND,
 618         CONF_NOT_COMPLETE,
 619 };
 620
 621 #define L2CAP_CONF_MAX_CONF_REQ 2
 622 #define L2CAP_CONF_MAX_CONF_RSP 2
 623
 624 enum {
 625         CONN_SREJ_SENT,
 626         CONN_WAIT_F,
 627         CONN_SREJ_ACT,
 628         CONN_SEND_PBIT,
 629         CONN_REMOTE_BUSY,
 630         CONN_LOCAL_BUSY,
 631         CONN_REJ_ACT,
 632         CONN_SEND_FBIT,
 633         CONN_RNR_SENT,
 634 };
 635
 636 /* Definitions for flags in l2cap_chan */
 637 enum {
 638         FLAG_ROLE_SWITCH,
 639         FLAG_FORCE_ACTIVE,
 640         FLAG_FORCE_RELIABLE,
 641         FLAG_FLUSHABLE,
 642         FLAG_EXT_CTRL,
 643         FLAG_EFS_ENABLE,
 644 };
 645
 646 enum {
 647         L2CAP_TX_STATE_XMIT,
 648         L2CAP_TX_STATE_WAIT_F,
 649 };
 650
 651 enum {
 652         L2CAP_RX_STATE_RECV,
 653         L2CAP_RX_STATE_SREJ_SENT,
 654         L2CAP_RX_STATE_MOVE,
 655         L2CAP_RX_STATE_WAIT_P,
 656         L2CAP_RX_STATE_WAIT_F,
 657 };
 658
 659 enum {
 660         L2CAP_TXSEQ_EXPECTED,
 661         L2CAP_TXSEQ_EXPECTED_SREJ,
 662         L2CAP_TXSEQ_UNEXPECTED,
 663         L2CAP_TXSEQ_UNEXPECTED_SREJ,
 664         L2CAP_TXSEQ_DUPLICATE,
 665         L2CAP_TXSEQ_DUPLICATE_SREJ,
 666         L2CAP_TXSEQ_INVALID,
 667         L2CAP_TXSEQ_INVALID_IGNORE,
 668 };
 669
 670 enum {
 671         L2CAP_EV_DATA_REQUEST,
 672         L2CAP_EV_LOCAL_BUSY_DETECTED,
 673         L2CAP_EV_LOCAL_BUSY_CLEAR,
 674         L2CAP_EV_RECV_REQSEQ_AND_FBIT,
 675         L2CAP_EV_RECV_FBIT,
 676         L2CAP_EV_RETRANS_TO,
 677         L2CAP_EV_MONITOR_TO,
 678         L2CAP_EV_EXPLICIT_POLL,
 679         L2CAP_EV_RECV_IFRAME,
 680         L2CAP_EV_RECV_RR,
 681         L2CAP_EV_RECV_REJ,
 682         L2CAP_EV_RECV_RNR,
 683         L2CAP_EV_RECV_SREJ,
 684         L2CAP_EV_RECV_FRAME,
 685 };
 686
 687 enum {
 688         L2CAP_MOVE_ROLE_NONE,
 689         L2CAP_MOVE_ROLE_INITIATOR,
 690         L2CAP_MOVE_ROLE_RESPONDER,
 691 };
 692
 693 enum {
 694         L2CAP_MOVE_STABLE,
 695         L2CAP_MOVE_WAIT_REQ,
 696         L2CAP_MOVE_WAIT_RSP,
 697         L2CAP_MOVE_WAIT_RSP_SUCCESS,
 698         L2CAP_MOVE_WAIT_CONFIRM,
 699         L2CAP_MOVE_WAIT_CONFIRM_RSP,
 700         L2CAP_MOVE_WAIT_LOGICAL_COMP,
 701         L2CAP_MOVE_WAIT_LOGICAL_CFM,
 702         L2CAP_MOVE_WAIT_LOCAL_BUSY,
 703         L2CAP_MOVE_WAIT_PREPARE,
 704 };
 705
 706 void l2cap_chan_hold(struct l2cap_chan *c);
 707 void l2cap_chan_put(struct l2cap_chan *c);
 708
 709 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
 710 {
 711         mutex_lock(&chan->lock);
 712 }
 713
 714 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
 715 {
 716         mutex_unlock(&chan->lock);
 717 }
 718
 719 static inline void l2cap_set_timer(struct l2cap_chan *chan,
 720                                    struct delayed_work *work, long timeout)
 721 {
 722         BT_DBG("chan %p state %s timeout %ld", chan,
 723                state_to_string(chan->state), timeout);
 724
 725         /* If delayed work cancelled do not hold(chan)
 726            since it is already done with previous set_timer */
 727         if (!cancel_delayed_work(work))
 728                 l2cap_chan_hold(chan);
 729
 730         schedule_delayed_work(work, timeout);
 731 }
 732
 733 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
 734                                      struct delayed_work *work)
 735 {
 736         bool ret;
 737
 738         /* put(chan) if delayed work cancelled otherwise it
 739            is done in delayed work function */
 740         ret = cancel_delayed_work(work);
 741         if (ret)
 742                 l2cap_chan_put(chan);
 743
 744         return ret;
 745 }
 746
 747 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
 748 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
 749 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
 750 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
 751 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
 752                 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
 753 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
 754
 755 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
 756 {
 757         if (seq1 >= seq2)
 758                 return seq1 - seq2;
 759         else
 760                 return chan->tx_win_max + 1 - seq2 + seq1;
 761 }
 762
 763 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
 764 {
 765         return (seq + 1) % (chan->tx_win_max + 1);
 766 }
 767
 768 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
 769 {
 770         return NULL;
 771 }
 772
 773 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
 774 {
 775 }
 776
 777 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
 778 {
 779 }
 780
 781 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
 782 {
 783 }
 784
 785 extern bool disable_ertm;
 786
 787 int l2cap_init_sockets(void);
 788 void l2cap_cleanup_sockets(void);
 789
 790 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
 791 int __l2cap_wait_ack(struct sock *sk);
 792
 793 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
 794 int l2cap_add_scid(struct l2cap_chan *chan,  __u16 scid);
 795
 796 struct l2cap_chan *l2cap_chan_create(void);
 797 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
 798 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
 799                        bdaddr_t *dst, u8 dst_type);
 800 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
 801                                                                 u32 priority);
 802 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
 803 int l2cap_chan_check_security(struct l2cap_chan *chan);
 804 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
 805 int l2cap_ertm_init(struct l2cap_chan *chan);
 806 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
 807 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
 808 void l2cap_chan_del(struct l2cap_chan *chan, int err);
 809 void l2cap_send_conn_req(struct l2cap_chan *chan);
 810 void l2cap_move_start(struct l2cap_chan *chan);
 811 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
 812                        u8 status);
 813 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
 814
 815 #endif /* __L2CAP_H */