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
  56 #define L2CAP_A2MP_DEFAULT_MTU          670
  57
  58 /* L2CAP socket address */
  59 struct sockaddr_l2 {
  60         sa_family_t     l2_family;
  61         __le16          l2_psm;
  62         bdaddr_t        l2_bdaddr;
  63         __le16          l2_cid;
  64         __u8            l2_bdaddr_type;
  65 };
  66
  67 /* L2CAP socket options */
  68 #define L2CAP_OPTIONS   0x01
  69 struct l2cap_options {
  70         __u16 omtu;
  71         __u16 imtu;
  72         __u16 flush_to;
  73         __u8  mode;
  74         __u8  fcs;
  75         __u8  max_tx;
  76         __u16 txwin_size;
  77 };
  78
  79 #define L2CAP_CONNINFO  0x02
  80 struct l2cap_conninfo {
  81         __u16 hci_handle;
  82         __u8  dev_class[3];
  83 };
  84
  85 #define L2CAP_LM        0x03
  86 #define L2CAP_LM_MASTER         0x0001
  87 #define L2CAP_LM_AUTH           0x0002
  88 #define L2CAP_LM_ENCRYPT        0x0004
  89 #define L2CAP_LM_TRUSTED        0x0008
  90 #define L2CAP_LM_RELIABLE       0x0010
  91 #define L2CAP_LM_SECURE         0x0020
  92
  93 /* L2CAP command codes */
  94 #define L2CAP_COMMAND_REJ       0x01
  95 #define L2CAP_CONN_REQ          0x02
  96 #define L2CAP_CONN_RSP          0x03
  97 #define L2CAP_CONF_REQ          0x04
  98 #define L2CAP_CONF_RSP          0x05
  99 #define L2CAP_DISCONN_REQ       0x06
 100 #define L2CAP_DISCONN_RSP       0x07
 101 #define L2CAP_ECHO_REQ          0x08
 102 #define L2CAP_ECHO_RSP          0x09
 103 #define L2CAP_INFO_REQ          0x0a
 104 #define L2CAP_INFO_RSP          0x0b
 105 #define L2CAP_CREATE_CHAN_REQ   0x0c
 106 #define L2CAP_CREATE_CHAN_RSP   0x0d
 107 #define L2CAP_MOVE_CHAN_REQ     0x0e
 108 #define L2CAP_MOVE_CHAN_RSP     0x0f
 109 #define L2CAP_MOVE_CHAN_CFM     0x10
 110 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
 111 #define L2CAP_CONN_PARAM_UPDATE_REQ     0x12
 112 #define L2CAP_CONN_PARAM_UPDATE_RSP     0x13
 113
 114 /* L2CAP extended feature mask */
 115 #define L2CAP_FEAT_FLOWCTL      0x00000001
 116 #define L2CAP_FEAT_RETRANS      0x00000002
 117 #define L2CAP_FEAT_BIDIR_QOS    0x00000004
 118 #define L2CAP_FEAT_ERTM         0x00000008
 119 #define L2CAP_FEAT_STREAMING    0x00000010
 120 #define L2CAP_FEAT_FCS          0x00000020
 121 #define L2CAP_FEAT_EXT_FLOW     0x00000040
 122 #define L2CAP_FEAT_FIXED_CHAN   0x00000080
 123 #define L2CAP_FEAT_EXT_WINDOW   0x00000100
 124 #define L2CAP_FEAT_UCD          0x00000200
 125
 126 /* L2CAP checksum option */
 127 #define L2CAP_FCS_NONE          0x00
 128 #define L2CAP_FCS_CRC16         0x01
 129
 130 /* L2CAP fixed channels */
 131 #define L2CAP_FC_L2CAP          0x02
 132 #define L2CAP_FC_A2MP           0x08
 133
 134 /* L2CAP Control Field bit masks */
 135 #define L2CAP_CTRL_SAR                  0xC000
 136 #define L2CAP_CTRL_REQSEQ               0x3F00
 137 #define L2CAP_CTRL_TXSEQ                0x007E
 138 #define L2CAP_CTRL_SUPERVISE            0x000C
 139
 140 #define L2CAP_CTRL_RETRANS              0x0080
 141 #define L2CAP_CTRL_FINAL                0x0080
 142 #define L2CAP_CTRL_POLL                 0x0010
 143 #define L2CAP_CTRL_FRAME_TYPE           0x0001 /* I- or S-Frame */
 144
 145 #define L2CAP_CTRL_TXSEQ_SHIFT          1
 146 #define L2CAP_CTRL_SUPER_SHIFT          2
 147 #define L2CAP_CTRL_POLL_SHIFT           4
 148 #define L2CAP_CTRL_FINAL_SHIFT          7
 149 #define L2CAP_CTRL_REQSEQ_SHIFT         8
 150 #define L2CAP_CTRL_SAR_SHIFT            14
 151
 152 /* L2CAP Extended Control Field bit mask */
 153 #define L2CAP_EXT_CTRL_TXSEQ            0xFFFC0000
 154 #define L2CAP_EXT_CTRL_SAR              0x00030000
 155 #define L2CAP_EXT_CTRL_SUPERVISE        0x00030000
 156 #define L2CAP_EXT_CTRL_REQSEQ           0x0000FFFC
 157
 158 #define L2CAP_EXT_CTRL_POLL             0x00040000
 159 #define L2CAP_EXT_CTRL_FINAL            0x00000002
 160 #define L2CAP_EXT_CTRL_FRAME_TYPE       0x00000001 /* I- or S-Frame */
 161
 162 #define L2CAP_EXT_CTRL_FINAL_SHIFT      1
 163 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT     2
 164 #define L2CAP_EXT_CTRL_SAR_SHIFT        16
 165 #define L2CAP_EXT_CTRL_SUPER_SHIFT      16
 166 #define L2CAP_EXT_CTRL_POLL_SHIFT       18
 167 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT      18
 168
 169 /* L2CAP Supervisory Function */
 170 #define L2CAP_SUPER_RR          0x00
 171 #define L2CAP_SUPER_REJ         0x01
 172 #define L2CAP_SUPER_RNR         0x02
 173 #define L2CAP_SUPER_SREJ        0x03
 174
 175 /* L2CAP Segmentation and Reassembly */
 176 #define L2CAP_SAR_UNSEGMENTED   0x00
 177 #define L2CAP_SAR_START         0x01
 178 #define L2CAP_SAR_END           0x02
 179 #define L2CAP_SAR_CONTINUE      0x03
 180
 181 /* L2CAP Command rej. reasons */
 182 #define L2CAP_REJ_NOT_UNDERSTOOD        0x0000
 183 #define L2CAP_REJ_MTU_EXCEEDED          0x0001
 184 #define L2CAP_REJ_INVALID_CID           0x0002
 185
 186 /* L2CAP structures */
 187 struct l2cap_hdr {
 188         __le16     len;
 189         __le16     cid;
 190 } __packed;
 191 #define L2CAP_HDR_SIZE          4
 192 #define L2CAP_ENH_HDR_SIZE      6
 193 #define L2CAP_EXT_HDR_SIZE      8
 194
 195 #define L2CAP_FCS_SIZE          2
 196 #define L2CAP_SDULEN_SIZE       2
 197 #define L2CAP_PSMLEN_SIZE       2
 198 #define L2CAP_ENH_CTRL_SIZE     2
 199 #define L2CAP_EXT_CTRL_SIZE     4
 200
 201 struct l2cap_cmd_hdr {
 202         __u8       code;
 203         __u8       ident;
 204         __le16     len;
 205 } __packed;
 206 #define L2CAP_CMD_HDR_SIZE      4
 207
 208 struct l2cap_cmd_rej_unk {
 209         __le16     reason;
 210 } __packed;
 211
 212 struct l2cap_cmd_rej_mtu {
 213         __le16     reason;
 214         __le16     max_mtu;
 215 } __packed;
 216
 217 struct l2cap_cmd_rej_cid {
 218         __le16     reason;
 219         __le16     scid;
 220         __le16     dcid;
 221 } __packed;
 222
 223 struct l2cap_conn_req {
 224         __le16     psm;
 225         __le16     scid;
 226 } __packed;
 227
 228 struct l2cap_conn_rsp {
 229         __le16     dcid;
 230         __le16     scid;
 231         __le16     result;
 232         __le16     status;
 233 } __packed;
 234
 235 /* protocol/service multiplexer (PSM) */
 236 #define L2CAP_PSM_SDP           0x0001
 237 #define L2CAP_PSM_RFCOMM        0x0003
 238
 239 /* channel indentifier */
 240 #define L2CAP_CID_SIGNALING     0x0001
 241 #define L2CAP_CID_CONN_LESS     0x0002
 242 #define L2CAP_CID_A2MP          0x0003
 243 #define L2CAP_CID_LE_DATA       0x0004
 244 #define L2CAP_CID_LE_SIGNALING  0x0005
 245 #define L2CAP_CID_SMP           0x0006
 246 #define L2CAP_CID_DYN_START     0x0040
 247 #define L2CAP_CID_DYN_END       0xffff
 248
 249 /* connect/create channel results */
 250 #define L2CAP_CR_SUCCESS        0x0000
 251 #define L2CAP_CR_PEND           0x0001
 252 #define L2CAP_CR_BAD_PSM        0x0002
 253 #define L2CAP_CR_SEC_BLOCK      0x0003
 254 #define L2CAP_CR_NO_MEM         0x0004
 255 #define L2CAP_CR_BAD_AMP        0x0005
 256
 257 /* connect/create channel status */
 258 #define L2CAP_CS_NO_INFO        0x0000
 259 #define L2CAP_CS_AUTHEN_PEND    0x0001
 260 #define L2CAP_CS_AUTHOR_PEND    0x0002
 261
 262 struct l2cap_conf_req {
 263         __le16     dcid;
 264         __le16     flags;
 265         __u8       data[0];
 266 } __packed;
 267
 268 struct l2cap_conf_rsp {
 269         __le16     scid;
 270         __le16     flags;
 271         __le16     result;
 272         __u8       data[0];
 273 } __packed;
 274
 275 #define L2CAP_CONF_SUCCESS      0x0000
 276 #define L2CAP_CONF_UNACCEPT     0x0001
 277 #define L2CAP_CONF_REJECT       0x0002
 278 #define L2CAP_CONF_UNKNOWN      0x0003
 279 #define L2CAP_CONF_PENDING      0x0004
 280 #define L2CAP_CONF_EFS_REJECT   0x0005
 281
 282 /* configuration req/rsp continuation flag */
 283 #define L2CAP_CONF_FLAG_CONTINUATION    0x0001
 284
 285 struct l2cap_conf_opt {
 286         __u8       type;
 287         __u8       len;
 288         __u8       val[0];
 289 } __packed;
 290 #define L2CAP_CONF_OPT_SIZE     2
 291
 292 #define L2CAP_CONF_HINT         0x80
 293 #define L2CAP_CONF_MASK         0x7f
 294
 295 #define L2CAP_CONF_MTU          0x01
 296 #define L2CAP_CONF_FLUSH_TO     0x02
 297 #define L2CAP_CONF_QOS          0x03
 298 #define L2CAP_CONF_RFC          0x04
 299 #define L2CAP_CONF_FCS          0x05
 300 #define L2CAP_CONF_EFS          0x06
 301 #define L2CAP_CONF_EWS          0x07
 302
 303 #define L2CAP_CONF_MAX_SIZE     22
 304
 305 struct l2cap_conf_rfc {
 306         __u8       mode;
 307         __u8       txwin_size;
 308         __u8       max_transmit;
 309         __le16     retrans_timeout;
 310         __le16     monitor_timeout;
 311         __le16     max_pdu_size;
 312 } __packed;
 313
 314 #define L2CAP_MODE_BASIC        0x00
 315 #define L2CAP_MODE_RETRANS      0x01
 316 #define L2CAP_MODE_FLOWCTL      0x02
 317 #define L2CAP_MODE_ERTM         0x03
 318 #define L2CAP_MODE_STREAMING    0x04
 319
 320 struct l2cap_conf_efs {
 321         __u8    id;
 322         __u8    stype;
 323         __le16  msdu;
 324         __le32  sdu_itime;
 325         __le32  acc_lat;
 326         __le32  flush_to;
 327 } __packed;
 328
 329 #define L2CAP_SERV_NOTRAFIC     0x00
 330 #define L2CAP_SERV_BESTEFFORT   0x01
 331 #define L2CAP_SERV_GUARANTEED   0x02
 332
 333 #define L2CAP_BESTEFFORT_ID     0x01
 334
 335 struct l2cap_disconn_req {
 336         __le16     dcid;
 337         __le16     scid;
 338 } __packed;
 339
 340 struct l2cap_disconn_rsp {
 341         __le16     dcid;
 342         __le16     scid;
 343 } __packed;
 344
 345 struct l2cap_info_req {
 346         __le16      type;
 347 } __packed;
 348
 349 struct l2cap_info_rsp {
 350         __le16      type;
 351         __le16      result;
 352         __u8        data[0];
 353 } __packed;
 354
 355 struct l2cap_create_chan_req {
 356         __le16      psm;
 357         __le16      scid;
 358         __u8        amp_id;
 359 } __packed;
 360
 361 struct l2cap_create_chan_rsp {
 362         __le16      dcid;
 363         __le16      scid;
 364         __le16      result;
 365         __le16      status;
 366 } __packed;
 367
 368 struct l2cap_move_chan_req {
 369         __le16      icid;
 370         __u8        dest_amp_id;
 371 } __packed;
 372
 373 struct l2cap_move_chan_rsp {
 374         __le16      icid;
 375         __le16      result;
 376 } __packed;
 377
 378 #define L2CAP_MR_SUCCESS        0x0000
 379 #define L2CAP_MR_PEND           0x0001
 380 #define L2CAP_MR_BAD_ID         0x0002
 381 #define L2CAP_MR_SAME_ID        0x0003
 382 #define L2CAP_MR_NOT_SUPP       0x0004
 383 #define L2CAP_MR_COLLISION      0x0005
 384 #define L2CAP_MR_NOT_ALLOWED    0x0006
 385
 386 struct l2cap_move_chan_cfm {
 387         __le16      icid;
 388         __le16      result;
 389 } __packed;
 390
 391 #define L2CAP_MC_CONFIRMED      0x0000
 392 #define L2CAP_MC_UNCONFIRMED    0x0001
 393
 394 struct l2cap_move_chan_cfm_rsp {
 395         __le16      icid;
 396 } __packed;
 397
 398 /* info type */
 399 #define L2CAP_IT_CL_MTU         0x0001
 400 #define L2CAP_IT_FEAT_MASK      0x0002
 401 #define L2CAP_IT_FIXED_CHAN     0x0003
 402
 403 /* info result */
 404 #define L2CAP_IR_SUCCESS        0x0000
 405 #define L2CAP_IR_NOTSUPP        0x0001
 406
 407 struct l2cap_conn_param_update_req {
 408         __le16      min;
 409         __le16      max;
 410         __le16      latency;
 411         __le16      to_multiplier;
 412 } __packed;
 413
 414 struct l2cap_conn_param_update_rsp {
 415         __le16      result;
 416 } __packed;
 417
 418 /* Connection Parameters result */
 419 #define L2CAP_CONN_PARAM_ACCEPTED       0x0000
 420 #define L2CAP_CONN_PARAM_REJECTED       0x0001
 421
 422 /* ----- L2CAP channels and connections ----- */
 423 struct l2cap_seq_list {
 424         __u16   head;
 425         __u16   tail;
 426         __u16   mask;
 427         __u16   *list;
 428 };
 429
 430 #define L2CAP_SEQ_LIST_CLEAR    0xFFFF
 431 #define L2CAP_SEQ_LIST_TAIL     0x8000
 432
 433 struct l2cap_chan {
 434         struct sock *sk;
 435
 436         struct l2cap_conn       *conn;
 437         struct kref     kref;
 438
 439         __u8            state;
 440
 441         __le16          psm;
 442         __u16           dcid;
 443         __u16           scid;
 444
 445         __u16           imtu;
 446         __u16           omtu;
 447         __u16           flush_to;
 448         __u8            mode;
 449         __u8            chan_type;
 450         __u8            chan_policy;
 451
 452         __le16          sport;
 453
 454         __u8            sec_level;
 455
 456         __u8            ident;
 457
 458         __u8            conf_req[64];
 459         __u8            conf_len;
 460         __u8            num_conf_req;
 461         __u8            num_conf_rsp;
 462
 463         __u8            fcs;
 464
 465         __u16           tx_win;
 466         __u16           tx_win_max;
 467         __u16           ack_win;
 468         __u8            max_tx;
 469         __u16           retrans_timeout;
 470         __u16           monitor_timeout;
 471         __u16           mps;
 472
 473         __u8            tx_state;
 474         __u8            rx_state;
 475
 476         unsigned long   conf_state;
 477         unsigned long   conn_state;
 478         unsigned long   flags;
 479
 480         __u16           next_tx_seq;
 481         __u16           expected_ack_seq;
 482         __u16           expected_tx_seq;
 483         __u16           buffer_seq;
 484         __u16           srej_save_reqseq;
 485         __u16           last_acked_seq;
 486         __u16           frames_sent;
 487         __u16           unacked_frames;
 488         __u8            retry_count;
 489         __u16           srej_queue_next;
 490         __u16           sdu_len;
 491         struct sk_buff  *sdu;
 492         struct sk_buff  *sdu_last_frag;
 493
 494         __u16           remote_tx_win;
 495         __u8            remote_max_tx;
 496         __u16           remote_mps;
 497
 498         __u8            local_id;
 499         __u8            local_stype;
 500         __u16           local_msdu;
 501         __u32           local_sdu_itime;
 502         __u32           local_acc_lat;
 503         __u32           local_flush_to;
 504
 505         __u8            remote_id;
 506         __u8            remote_stype;
 507         __u16           remote_msdu;
 508         __u32           remote_sdu_itime;
 509         __u32           remote_acc_lat;
 510         __u32           remote_flush_to;
 511
 512         __u8            ctrl_id;
 513
 514         struct delayed_work     chan_timer;
 515         struct delayed_work     retrans_timer;
 516         struct delayed_work     monitor_timer;
 517         struct delayed_work     ack_timer;
 518
 519         struct sk_buff          *tx_send_head;
 520         struct sk_buff_head     tx_q;
 521         struct sk_buff_head     srej_q;
 522         struct l2cap_seq_list   srej_list;
 523         struct l2cap_seq_list   retrans_list;
 524
 525         struct list_head        list;
 526         struct list_head        global_l;
 527
 528         void                    *data;
 529         struct l2cap_ops        *ops;
 530         struct mutex            lock;
 531 };
 532
 533 struct l2cap_ops {
 534         char                    *name;
 535
 536         struct l2cap_chan       *(*new_connection) (struct l2cap_chan *chan);
 537         int                     (*recv) (struct l2cap_chan * chan,
 538                                          struct sk_buff *skb);
 539         void                    (*teardown) (struct l2cap_chan *chan, int err);
 540         void                    (*close) (struct l2cap_chan *chan);
 541         void                    (*state_change) (struct l2cap_chan *chan,
 542                                                  int state);
 543         void                    (*ready) (struct l2cap_chan *chan);
 544         void                    (*defer) (struct l2cap_chan *chan);
 545         struct sk_buff          *(*alloc_skb) (struct l2cap_chan *chan,
 546                                                unsigned long len, int nb);
 547 };
 548
 549 struct l2cap_conn {
 550         struct hci_conn         *hcon;
 551         struct hci_chan         *hchan;
 552
 553         bdaddr_t                *dst;
 554         bdaddr_t                *src;
 555
 556         unsigned int            mtu;
 557
 558         __u32                   feat_mask;
 559         __u8                    fixed_chan_mask;
 560
 561         __u8                    info_state;
 562         __u8                    info_ident;
 563
 564         struct delayed_work     info_timer;
 565
 566         spinlock_t              lock;
 567
 568         struct sk_buff          *rx_skb;
 569         __u32                   rx_len;
 570         __u8                    tx_ident;
 571
 572         __u8                    disc_reason;
 573
 574         struct delayed_work     security_timer;
 575         struct smp_chan         *smp_chan;
 576
 577         struct list_head        chan_l;
 578         struct mutex            chan_lock;
 579 };
 580
 581 #define L2CAP_INFO_CL_MTU_REQ_SENT      0x01
 582 #define L2CAP_INFO_FEAT_MASK_REQ_SENT   0x04
 583 #define L2CAP_INFO_FEAT_MASK_REQ_DONE   0x08
 584
 585 #define L2CAP_CHAN_RAW                  1
 586 #define L2CAP_CHAN_CONN_LESS            2
 587 #define L2CAP_CHAN_CONN_ORIENTED        3
 588 #define L2CAP_CHAN_CONN_FIX_A2MP        4
 589
 590 /* ----- L2CAP socket info ----- */
 591 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
 592
 593 struct l2cap_pinfo {
 594         struct bt_sock          bt;
 595         struct l2cap_chan       *chan;
 596         struct sk_buff          *rx_busy_skb;
 597 };
 598
 599 enum {
 600         CONF_REQ_SENT,
 601         CONF_INPUT_DONE,
 602         CONF_OUTPUT_DONE,
 603         CONF_MTU_DONE,
 604         CONF_MODE_DONE,
 605         CONF_CONNECT_PEND,
 606         CONF_NO_FCS_RECV,
 607         CONF_STATE2_DEVICE,
 608         CONF_EWS_RECV,
 609         CONF_LOC_CONF_PEND,
 610         CONF_REM_CONF_PEND,
 611         CONF_NOT_COMPLETE,
 612 };
 613
 614 #define L2CAP_CONF_MAX_CONF_REQ 2
 615 #define L2CAP_CONF_MAX_CONF_RSP 2
 616
 617 enum {
 618         CONN_SREJ_SENT,
 619         CONN_WAIT_F,
 620         CONN_SREJ_ACT,
 621         CONN_SEND_PBIT,
 622         CONN_REMOTE_BUSY,
 623         CONN_LOCAL_BUSY,
 624         CONN_REJ_ACT,
 625         CONN_SEND_FBIT,
 626         CONN_RNR_SENT,
 627 };
 628
 629 /* Definitions for flags in l2cap_chan */
 630 enum {
 631         FLAG_ROLE_SWITCH,
 632         FLAG_FORCE_ACTIVE,
 633         FLAG_FORCE_RELIABLE,
 634         FLAG_FLUSHABLE,
 635         FLAG_EXT_CTRL,
 636         FLAG_EFS_ENABLE,
 637 };
 638
 639 enum {
 640         L2CAP_TX_STATE_XMIT,
 641         L2CAP_TX_STATE_WAIT_F,
 642 };
 643
 644 enum {
 645         L2CAP_RX_STATE_RECV,
 646         L2CAP_RX_STATE_SREJ_SENT,
 647 };
 648
 649 enum {
 650         L2CAP_TXSEQ_EXPECTED,
 651         L2CAP_TXSEQ_EXPECTED_SREJ,
 652         L2CAP_TXSEQ_UNEXPECTED,
 653         L2CAP_TXSEQ_UNEXPECTED_SREJ,
 654         L2CAP_TXSEQ_DUPLICATE,
 655         L2CAP_TXSEQ_DUPLICATE_SREJ,
 656         L2CAP_TXSEQ_INVALID,
 657         L2CAP_TXSEQ_INVALID_IGNORE,
 658 };
 659
 660 enum {
 661         L2CAP_EV_DATA_REQUEST,
 662         L2CAP_EV_LOCAL_BUSY_DETECTED,
 663         L2CAP_EV_LOCAL_BUSY_CLEAR,
 664         L2CAP_EV_RECV_REQSEQ_AND_FBIT,
 665         L2CAP_EV_RECV_FBIT,
 666         L2CAP_EV_RETRANS_TO,
 667         L2CAP_EV_MONITOR_TO,
 668         L2CAP_EV_EXPLICIT_POLL,
 669         L2CAP_EV_RECV_IFRAME,
 670         L2CAP_EV_RECV_RR,
 671         L2CAP_EV_RECV_REJ,
 672         L2CAP_EV_RECV_RNR,
 673         L2CAP_EV_RECV_SREJ,
 674         L2CAP_EV_RECV_FRAME,
 675 };
 676
 677 void l2cap_chan_hold(struct l2cap_chan *c);
 678 void l2cap_chan_put(struct l2cap_chan *c);
 679
 680 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
 681 {
 682         mutex_lock(&chan->lock);
 683 }
 684
 685 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
 686 {
 687         mutex_unlock(&chan->lock);
 688 }
 689
 690 static inline void l2cap_set_timer(struct l2cap_chan *chan,
 691                                    struct delayed_work *work, long timeout)
 692 {
 693         BT_DBG("chan %p state %s timeout %ld", chan,
 694                state_to_string(chan->state), timeout);
 695
 696         /* If delayed work cancelled do not hold(chan)
 697            since it is already done with previous set_timer */
 698         if (!cancel_delayed_work(work))
 699                 l2cap_chan_hold(chan);
 700
 701         schedule_delayed_work(work, timeout);
 702 }
 703
 704 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
 705                                      struct delayed_work *work)
 706 {
 707         bool ret;
 708
 709         /* put(chan) if delayed work cancelled otherwise it
 710            is done in delayed work function */
 711         ret = cancel_delayed_work(work);
 712         if (ret)
 713                 l2cap_chan_put(chan);
 714
 715         return ret;
 716 }
 717
 718 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
 719 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
 720 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
 721 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
 722 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
 723                 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
 724 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
 725
 726 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
 727 {
 728         if (seq1 >= seq2)
 729                 return seq1 - seq2;
 730         else
 731                 return chan->tx_win_max + 1 - seq2 + seq1;
 732 }
 733
 734 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
 735 {
 736         return (seq + 1) % (chan->tx_win_max + 1);
 737 }
 738
 739 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
 740 {
 741         return NULL;
 742 }
 743
 744 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
 745 {
 746 }
 747
 748 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
 749 {
 750 }
 751
 752 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
 753 {
 754 }
 755
 756 extern bool disable_ertm;
 757
 758 int l2cap_init_sockets(void);
 759 void l2cap_cleanup_sockets(void);
 760
 761 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
 762 int __l2cap_wait_ack(struct sock *sk);
 763
 764 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
 765 int l2cap_add_scid(struct l2cap_chan *chan,  __u16 scid);
 766
 767 struct l2cap_chan *l2cap_chan_create(void);
 768 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
 769 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
 770                        bdaddr_t *dst, u8 dst_type);
 771 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
 772                                                                 u32 priority);
 773 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
 774 int l2cap_chan_check_security(struct l2cap_chan *chan);
 775 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
 776 int l2cap_ertm_init(struct l2cap_chan *chan);
 777 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
 778 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
 779 void l2cap_chan_del(struct l2cap_chan *chan, int err);
 780 void l2cap_send_conn_req(struct l2cap_chan *chan);
 781
 782 #endif /* __L2CAP_H */