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#include <linux/atomic.h> 32 33/* L2CAP defaults */ 34#define L2CAP_DEFAULT_MTU 672 35#define L2CAP_DEFAULT_MIN_MTU 48 36#define L2CAP_DEFAULT_FLUSH_TO 0xFFFF 37#define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF 38#define L2CAP_DEFAULT_TX_WINDOW 63 39#define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF 40#define L2CAP_DEFAULT_MAX_TX 3 41#define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */ 42#define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ 43#define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */ 44#define L2CAP_DEFAULT_ACK_TO 200 45#define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF 46#define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF 47#define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF 48#define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */ 49#define L2CAP_LE_MIN_MTU 23 50 51#define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100) 52#define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000) 53#define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000) 54#define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000) 55#define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000) 56#define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000) 57#define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000) 58 59#define L2CAP_A2MP_DEFAULT_MTU 670 60 61/* L2CAP socket address */ 62struct sockaddr_l2 { 63 sa_family_t l2_family; 64 __le16 l2_psm; 65 bdaddr_t l2_bdaddr; 66 __le16 l2_cid; 67 __u8 l2_bdaddr_type; 68}; 69 70/* L2CAP socket options */ 71#define L2CAP_OPTIONS 0x01 72struct l2cap_options { 73 __u16 omtu; 74 __u16 imtu; 75 __u16 flush_to; 76 __u8 mode; 77 __u8 fcs; 78 __u8 max_tx; 79 __u16 txwin_size; 80}; 81 82#define L2CAP_CONNINFO 0x02 83struct l2cap_conninfo { 84 __u16 hci_handle; 85 __u8 dev_class[3]; 86}; 87 88#define L2CAP_LM 0x03 89#define L2CAP_LM_MASTER 0x0001 90#define L2CAP_LM_AUTH 0x0002 91#define L2CAP_LM_ENCRYPT 0x0004 92#define L2CAP_LM_TRUSTED 0x0008 93#define L2CAP_LM_RELIABLE 0x0010 94#define L2CAP_LM_SECURE 0x0020 95#define L2CAP_LM_FIPS 0x0040 96 97/* L2CAP command codes */ 98#define L2CAP_COMMAND_REJ 0x01 99#define L2CAP_CONN_REQ 0x02 100#define L2CAP_CONN_RSP 0x03 101#define L2CAP_CONF_REQ 0x04 102#define L2CAP_CONF_RSP 0x05 103#define L2CAP_DISCONN_REQ 0x06 104#define L2CAP_DISCONN_RSP 0x07 105#define L2CAP_ECHO_REQ 0x08 106#define L2CAP_ECHO_RSP 0x09 107#define L2CAP_INFO_REQ 0x0a 108#define L2CAP_INFO_RSP 0x0b 109#define L2CAP_CREATE_CHAN_REQ 0x0c 110#define L2CAP_CREATE_CHAN_RSP 0x0d 111#define L2CAP_MOVE_CHAN_REQ 0x0e 112#define L2CAP_MOVE_CHAN_RSP 0x0f 113#define L2CAP_MOVE_CHAN_CFM 0x10 114#define L2CAP_MOVE_CHAN_CFM_RSP 0x11 115#define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 116#define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 117#define L2CAP_LE_CONN_REQ 0x14 118#define L2CAP_LE_CONN_RSP 0x15 119#define L2CAP_LE_CREDITS 0x16 120 121/* L2CAP extended feature mask */ 122#define L2CAP_FEAT_FLOWCTL 0x00000001 123#define L2CAP_FEAT_RETRANS 0x00000002 124#define L2CAP_FEAT_BIDIR_QOS 0x00000004 125#define L2CAP_FEAT_ERTM 0x00000008 126#define L2CAP_FEAT_STREAMING 0x00000010 127#define L2CAP_FEAT_FCS 0x00000020 128#define L2CAP_FEAT_EXT_FLOW 0x00000040 129#define L2CAP_FEAT_FIXED_CHAN 0x00000080 130#define L2CAP_FEAT_EXT_WINDOW 0x00000100 131#define L2CAP_FEAT_UCD 0x00000200 132 133/* L2CAP checksum option */ 134#define L2CAP_FCS_NONE 0x00 135#define L2CAP_FCS_CRC16 0x01 136 137/* L2CAP fixed channels */ 138#define L2CAP_FC_SIG_BREDR 0x02 139#define L2CAP_FC_CONNLESS 0x04 140#define L2CAP_FC_A2MP 0x08 141#define L2CAP_FC_ATT 0x10 142#define L2CAP_FC_SIG_LE 0x20 143#define L2CAP_FC_SMP_LE 0x40 144#define L2CAP_FC_SMP_BREDR 0x80 145 146/* L2CAP Control Field bit masks */ 147#define L2CAP_CTRL_SAR 0xC000 148#define L2CAP_CTRL_REQSEQ 0x3F00 149#define L2CAP_CTRL_TXSEQ 0x007E 150#define L2CAP_CTRL_SUPERVISE 0x000C 151 152#define L2CAP_CTRL_RETRANS 0x0080 153#define L2CAP_CTRL_FINAL 0x0080 154#define L2CAP_CTRL_POLL 0x0010 155#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 156 157#define L2CAP_CTRL_TXSEQ_SHIFT 1 158#define L2CAP_CTRL_SUPER_SHIFT 2 159#define L2CAP_CTRL_POLL_SHIFT 4 160#define L2CAP_CTRL_FINAL_SHIFT 7 161#define L2CAP_CTRL_REQSEQ_SHIFT 8 162#define L2CAP_CTRL_SAR_SHIFT 14 163 164/* L2CAP Extended Control Field bit mask */ 165#define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 166#define L2CAP_EXT_CTRL_SAR 0x00030000 167#define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 168#define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 169 170#define L2CAP_EXT_CTRL_POLL 0x00040000 171#define L2CAP_EXT_CTRL_FINAL 0x00000002 172#define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 173 174#define L2CAP_EXT_CTRL_FINAL_SHIFT 1 175#define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 176#define L2CAP_EXT_CTRL_SAR_SHIFT 16 177#define L2CAP_EXT_CTRL_SUPER_SHIFT 16 178#define L2CAP_EXT_CTRL_POLL_SHIFT 18 179#define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 180 181/* L2CAP Supervisory Function */ 182#define L2CAP_SUPER_RR 0x00 183#define L2CAP_SUPER_REJ 0x01 184#define L2CAP_SUPER_RNR 0x02 185#define L2CAP_SUPER_SREJ 0x03 186 187/* L2CAP Segmentation and Reassembly */ 188#define L2CAP_SAR_UNSEGMENTED 0x00 189#define L2CAP_SAR_START 0x01 190#define L2CAP_SAR_END 0x02 191#define L2CAP_SAR_CONTINUE 0x03 192 193/* L2CAP Command rej. reasons */ 194#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 195#define L2CAP_REJ_MTU_EXCEEDED 0x0001 196#define L2CAP_REJ_INVALID_CID 0x0002 197 198/* L2CAP structures */ 199struct l2cap_hdr { 200 __le16 len; 201 __le16 cid; 202} __packed; 203#define L2CAP_HDR_SIZE 4 204#define L2CAP_ENH_HDR_SIZE 6 205#define L2CAP_EXT_HDR_SIZE 8 206 207#define L2CAP_FCS_SIZE 2 208#define L2CAP_SDULEN_SIZE 2 209#define L2CAP_PSMLEN_SIZE 2 210#define L2CAP_ENH_CTRL_SIZE 2 211#define L2CAP_EXT_CTRL_SIZE 4 212 213struct l2cap_cmd_hdr { 214 __u8 code; 215 __u8 ident; 216 __le16 len; 217} __packed; 218#define L2CAP_CMD_HDR_SIZE 4 219 220struct l2cap_cmd_rej_unk { 221 __le16 reason; 222} __packed; 223 224struct l2cap_cmd_rej_mtu { 225 __le16 reason; 226 __le16 max_mtu; 227} __packed; 228 229struct l2cap_cmd_rej_cid { 230 __le16 reason; 231 __le16 scid; 232 __le16 dcid; 233} __packed; 234 235struct l2cap_conn_req { 236 __le16 psm; 237 __le16 scid; 238} __packed; 239 240struct l2cap_conn_rsp { 241 __le16 dcid; 242 __le16 scid; 243 __le16 result; 244 __le16 status; 245} __packed; 246 247/* protocol/service multiplexer (PSM) */ 248#define L2CAP_PSM_SDP 0x0001 249#define L2CAP_PSM_RFCOMM 0x0003 250#define L2CAP_PSM_3DSP 0x0021 251#define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ 252 253/* channel identifier */ 254#define L2CAP_CID_SIGNALING 0x0001 255#define L2CAP_CID_CONN_LESS 0x0002 256#define L2CAP_CID_A2MP 0x0003 257#define L2CAP_CID_ATT 0x0004 258#define L2CAP_CID_LE_SIGNALING 0x0005 259#define L2CAP_CID_SMP 0x0006 260#define L2CAP_CID_SMP_BREDR 0x0007 261#define L2CAP_CID_DYN_START 0x0040 262#define L2CAP_CID_DYN_END 0xffff 263#define L2CAP_CID_LE_DYN_END 0x007f 264 265/* connect/create channel results */ 266#define L2CAP_CR_SUCCESS 0x0000 267#define L2CAP_CR_PEND 0x0001 268#define L2CAP_CR_BAD_PSM 0x0002 269#define L2CAP_CR_SEC_BLOCK 0x0003 270#define L2CAP_CR_NO_MEM 0x0004 271#define L2CAP_CR_BAD_AMP 0x0005 272#define L2CAP_CR_AUTHENTICATION 0x0005 273#define L2CAP_CR_AUTHORIZATION 0x0006 274#define L2CAP_CR_BAD_KEY_SIZE 0x0007 275#define L2CAP_CR_ENCRYPTION 0x0008 276 277/* connect/create channel status */ 278#define L2CAP_CS_NO_INFO 0x0000 279#define L2CAP_CS_AUTHEN_PEND 0x0001 280#define L2CAP_CS_AUTHOR_PEND 0x0002 281 282struct l2cap_conf_req { 283 __le16 dcid; 284 __le16 flags; 285 __u8 data[0]; 286} __packed; 287 288struct l2cap_conf_rsp { 289 __le16 scid; 290 __le16 flags; 291 __le16 result; 292 __u8 data[0]; 293} __packed; 294 295#define L2CAP_CONF_SUCCESS 0x0000 296#define L2CAP_CONF_UNACCEPT 0x0001 297#define L2CAP_CONF_REJECT 0x0002 298#define L2CAP_CONF_UNKNOWN 0x0003 299#define L2CAP_CONF_PENDING 0x0004 300#define L2CAP_CONF_EFS_REJECT 0x0005 301 302/* configuration req/rsp continuation flag */ 303#define L2CAP_CONF_FLAG_CONTINUATION 0x0001 304 305struct l2cap_conf_opt { 306 __u8 type; 307 __u8 len; 308 __u8 val[0]; 309} __packed; 310#define L2CAP_CONF_OPT_SIZE 2 311 312#define L2CAP_CONF_HINT 0x80 313#define L2CAP_CONF_MASK 0x7f 314 315#define L2CAP_CONF_MTU 0x01 316#define L2CAP_CONF_FLUSH_TO 0x02 317#define L2CAP_CONF_QOS 0x03 318#define L2CAP_CONF_RFC 0x04 319#define L2CAP_CONF_FCS 0x05 320#define L2CAP_CONF_EFS 0x06 321#define L2CAP_CONF_EWS 0x07 322 323#define L2CAP_CONF_MAX_SIZE 22 324 325struct l2cap_conf_rfc { 326 __u8 mode; 327 __u8 txwin_size; 328 __u8 max_transmit; 329 __le16 retrans_timeout; 330 __le16 monitor_timeout; 331 __le16 max_pdu_size; 332} __packed; 333 334#define L2CAP_MODE_BASIC 0x00 335#define L2CAP_MODE_RETRANS 0x01 336#define L2CAP_MODE_FLOWCTL 0x02 337#define L2CAP_MODE_ERTM 0x03 338#define L2CAP_MODE_STREAMING 0x04 339 340/* Unlike the above this one doesn't actually map to anything that would 341 * ever be sent over the air. Therefore, use a value that's unlikely to 342 * ever be used in the BR/EDR configuration phase. 343 */ 344#define L2CAP_MODE_LE_FLOWCTL 0x80 345 346struct l2cap_conf_efs { 347 __u8 id; 348 __u8 stype; 349 __le16 msdu; 350 __le32 sdu_itime; 351 __le32 acc_lat; 352 __le32 flush_to; 353} __packed; 354 355#define L2CAP_SERV_NOTRAFIC 0x00 356#define L2CAP_SERV_BESTEFFORT 0x01 357#define L2CAP_SERV_GUARANTEED 0x02 358 359#define L2CAP_BESTEFFORT_ID 0x01 360 361struct l2cap_disconn_req { 362 __le16 dcid; 363 __le16 scid; 364} __packed; 365 366struct l2cap_disconn_rsp { 367 __le16 dcid; 368 __le16 scid; 369} __packed; 370 371struct l2cap_info_req { 372 __le16 type; 373} __packed; 374 375struct l2cap_info_rsp { 376 __le16 type; 377 __le16 result; 378 __u8 data[0]; 379} __packed; 380 381struct l2cap_create_chan_req { 382 __le16 psm; 383 __le16 scid; 384 __u8 amp_id; 385} __packed; 386 387struct l2cap_create_chan_rsp { 388 __le16 dcid; 389 __le16 scid; 390 __le16 result; 391 __le16 status; 392} __packed; 393 394struct l2cap_move_chan_req { 395 __le16 icid; 396 __u8 dest_amp_id; 397} __packed; 398 399struct l2cap_move_chan_rsp { 400 __le16 icid; 401 __le16 result; 402} __packed; 403 404#define L2CAP_MR_SUCCESS 0x0000 405#define L2CAP_MR_PEND 0x0001 406#define L2CAP_MR_BAD_ID 0x0002 407#define L2CAP_MR_SAME_ID 0x0003 408#define L2CAP_MR_NOT_SUPP 0x0004 409#define L2CAP_MR_COLLISION 0x0005 410#define L2CAP_MR_NOT_ALLOWED 0x0006 411 412struct l2cap_move_chan_cfm { 413 __le16 icid; 414 __le16 result; 415} __packed; 416 417#define L2CAP_MC_CONFIRMED 0x0000 418#define L2CAP_MC_UNCONFIRMED 0x0001 419 420struct l2cap_move_chan_cfm_rsp { 421 __le16 icid; 422} __packed; 423 424/* info type */ 425#define L2CAP_IT_CL_MTU 0x0001 426#define L2CAP_IT_FEAT_MASK 0x0002 427#define L2CAP_IT_FIXED_CHAN 0x0003 428 429/* info result */ 430#define L2CAP_IR_SUCCESS 0x0000 431#define L2CAP_IR_NOTSUPP 0x0001 432 433struct l2cap_conn_param_update_req { 434 __le16 min; 435 __le16 max; 436 __le16 latency; 437 __le16 to_multiplier; 438} __packed; 439 440struct l2cap_conn_param_update_rsp { 441 __le16 result; 442} __packed; 443 444/* Connection Parameters result */ 445#define L2CAP_CONN_PARAM_ACCEPTED 0x0000 446#define L2CAP_CONN_PARAM_REJECTED 0x0001 447 448#define L2CAP_LE_MAX_CREDITS 10 449#define L2CAP_LE_DEFAULT_MPS 230 450 451struct l2cap_le_conn_req { 452 __le16 psm; 453 __le16 scid; 454 __le16 mtu; 455 __le16 mps; 456 __le16 credits; 457} __packed; 458 459struct l2cap_le_conn_rsp { 460 __le16 dcid; 461 __le16 mtu; 462 __le16 mps; 463 __le16 credits; 464 __le16 result; 465} __packed; 466 467struct l2cap_le_credits { 468 __le16 cid; 469 __le16 credits; 470} __packed; 471 472/* ----- L2CAP channels and connections ----- */ 473struct l2cap_seq_list { 474 __u16 head; 475 __u16 tail; 476 __u16 mask; 477 __u16 *list; 478}; 479 480#define L2CAP_SEQ_LIST_CLEAR 0xFFFF 481#define L2CAP_SEQ_LIST_TAIL 0x8000 482 483struct l2cap_chan { 484 struct l2cap_conn *conn; 485 struct hci_conn *hs_hcon; 486 struct hci_chan *hs_hchan; 487 struct kref kref; 488 atomic_t nesting; 489 490 __u8 state; 491 492 bdaddr_t dst; 493 __u8 dst_type; 494 bdaddr_t src; 495 __u8 src_type; 496 __le16 psm; 497 __le16 sport; 498 __u16 dcid; 499 __u16 scid; 500 501 __u16 imtu; 502 __u16 omtu; 503 __u16 flush_to; 504 __u8 mode; 505 __u8 chan_type; 506 __u8 chan_policy; 507 508 __u8 sec_level; 509 510 __u8 ident; 511 512 __u8 conf_req[64]; 513 __u8 conf_len; 514 __u8 num_conf_req; 515 __u8 num_conf_rsp; 516 517 __u8 fcs; 518 519 __u16 tx_win; 520 __u16 tx_win_max; 521 __u16 ack_win; 522 __u8 max_tx; 523 __u16 retrans_timeout; 524 __u16 monitor_timeout; 525 __u16 mps; 526 527 __u16 tx_credits; 528 __u16 rx_credits; 529 530 __u8 tx_state; 531 __u8 rx_state; 532 533 unsigned long conf_state; 534 unsigned long conn_state; 535 unsigned long flags; 536 537 __u8 remote_amp_id; 538 __u8 local_amp_id; 539 __u8 move_id; 540 __u8 move_state; 541 __u8 move_role; 542 543 __u16 next_tx_seq; 544 __u16 expected_ack_seq; 545 __u16 expected_tx_seq; 546 __u16 buffer_seq; 547 __u16 srej_save_reqseq; 548 __u16 last_acked_seq; 549 __u16 frames_sent; 550 __u16 unacked_frames; 551 __u8 retry_count; 552 __u16 sdu_len; 553 struct sk_buff *sdu; 554 struct sk_buff *sdu_last_frag; 555 556 __u16 remote_tx_win; 557 __u8 remote_max_tx; 558 __u16 remote_mps; 559 560 __u8 local_id; 561 __u8 local_stype; 562 __u16 local_msdu; 563 __u32 local_sdu_itime; 564 __u32 local_acc_lat; 565 __u32 local_flush_to; 566 567 __u8 remote_id; 568 __u8 remote_stype; 569 __u16 remote_msdu; 570 __u32 remote_sdu_itime; 571 __u32 remote_acc_lat; 572 __u32 remote_flush_to; 573 574 struct delayed_work chan_timer; 575 struct delayed_work retrans_timer; 576 struct delayed_work monitor_timer; 577 struct delayed_work ack_timer; 578 579 struct sk_buff *tx_send_head; 580 struct sk_buff_head tx_q; 581 struct sk_buff_head srej_q; 582 struct l2cap_seq_list srej_list; 583 struct l2cap_seq_list retrans_list; 584 585 struct list_head list; 586 struct list_head global_l; 587 588 void *data; 589 const struct l2cap_ops *ops; 590 struct mutex lock; 591}; 592 593struct l2cap_ops { 594 char *name; 595 596 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 597 int (*recv) (struct l2cap_chan * chan, 598 struct sk_buff *skb); 599 void (*teardown) (struct l2cap_chan *chan, int err); 600 void (*close) (struct l2cap_chan *chan); 601 void (*state_change) (struct l2cap_chan *chan, 602 int state, int err); 603 void (*ready) (struct l2cap_chan *chan); 604 void (*defer) (struct l2cap_chan *chan); 605 void (*resume) (struct l2cap_chan *chan); 606 void (*suspend) (struct l2cap_chan *chan); 607 void (*set_shutdown) (struct l2cap_chan *chan); 608 long (*get_sndtimeo) (struct l2cap_chan *chan); 609 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 610 unsigned long hdr_len, 611 unsigned long len, int nb); 612}; 613 614struct l2cap_conn { 615 struct hci_conn *hcon; 616 struct hci_chan *hchan; 617 618 unsigned int mtu; 619 620 __u32 feat_mask; 621 __u8 remote_fixed_chan; 622 __u8 local_fixed_chan; 623 624 __u8 info_state; 625 __u8 info_ident; 626 627 struct delayed_work info_timer; 628 629 struct sk_buff *rx_skb; 630 __u32 rx_len; 631 __u8 tx_ident; 632 struct mutex ident_lock; 633 634 struct sk_buff_head pending_rx; 635 struct work_struct pending_rx_work; 636 637 struct work_struct id_addr_update_work; 638 639 __u8 disc_reason; 640 641 struct l2cap_chan *smp; 642 643 struct list_head chan_l; 644 struct mutex chan_lock; 645 struct kref ref; 646 struct list_head users; 647}; 648 649struct l2cap_user { 650 struct list_head list; 651 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 652 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 653}; 654 655#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 656#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 657#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 658 659#define L2CAP_CHAN_RAW 1 660#define L2CAP_CHAN_CONN_LESS 2 661#define L2CAP_CHAN_CONN_ORIENTED 3 662#define L2CAP_CHAN_FIXED 4 663 664/* ----- L2CAP socket info ----- */ 665#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 666 667struct l2cap_pinfo { 668 struct bt_sock bt; 669 struct l2cap_chan *chan; 670 struct sk_buff *rx_busy_skb; 671}; 672 673enum { 674 CONF_REQ_SENT, 675 CONF_INPUT_DONE, 676 CONF_OUTPUT_DONE, 677 CONF_MTU_DONE, 678 CONF_MODE_DONE, 679 CONF_CONNECT_PEND, 680 CONF_RECV_NO_FCS, 681 CONF_STATE2_DEVICE, 682 CONF_EWS_RECV, 683 CONF_LOC_CONF_PEND, 684 CONF_REM_CONF_PEND, 685 CONF_NOT_COMPLETE, 686}; 687 688#define L2CAP_CONF_MAX_CONF_REQ 2 689#define L2CAP_CONF_MAX_CONF_RSP 2 690 691enum { 692 CONN_SREJ_SENT, 693 CONN_WAIT_F, 694 CONN_SREJ_ACT, 695 CONN_SEND_PBIT, 696 CONN_REMOTE_BUSY, 697 CONN_LOCAL_BUSY, 698 CONN_REJ_ACT, 699 CONN_SEND_FBIT, 700 CONN_RNR_SENT, 701}; 702 703/* Definitions for flags in l2cap_chan */ 704enum { 705 FLAG_ROLE_SWITCH, 706 FLAG_FORCE_ACTIVE, 707 FLAG_FORCE_RELIABLE, 708 FLAG_FLUSHABLE, 709 FLAG_EXT_CTRL, 710 FLAG_EFS_ENABLE, 711 FLAG_DEFER_SETUP, 712 FLAG_LE_CONN_REQ_SENT, 713 FLAG_PENDING_SECURITY, 714 FLAG_HOLD_HCI_CONN, 715}; 716 717/* Lock nesting levels for L2CAP channels. We need these because lockdep 718 * otherwise considers all channels equal and will e.g. complain about a 719 * connection oriented channel triggering SMP procedures or a listening 720 * channel creating and locking a child channel. 721 */ 722enum { 723 L2CAP_NESTING_SMP, 724 L2CAP_NESTING_NORMAL, 725 L2CAP_NESTING_PARENT, 726}; 727 728enum { 729 L2CAP_TX_STATE_XMIT, 730 L2CAP_TX_STATE_WAIT_F, 731}; 732 733enum { 734 L2CAP_RX_STATE_RECV, 735 L2CAP_RX_STATE_SREJ_SENT, 736 L2CAP_RX_STATE_MOVE, 737 L2CAP_RX_STATE_WAIT_P, 738 L2CAP_RX_STATE_WAIT_F, 739}; 740 741enum { 742 L2CAP_TXSEQ_EXPECTED, 743 L2CAP_TXSEQ_EXPECTED_SREJ, 744 L2CAP_TXSEQ_UNEXPECTED, 745 L2CAP_TXSEQ_UNEXPECTED_SREJ, 746 L2CAP_TXSEQ_DUPLICATE, 747 L2CAP_TXSEQ_DUPLICATE_SREJ, 748 L2CAP_TXSEQ_INVALID, 749 L2CAP_TXSEQ_INVALID_IGNORE, 750}; 751 752enum { 753 L2CAP_EV_DATA_REQUEST, 754 L2CAP_EV_LOCAL_BUSY_DETECTED, 755 L2CAP_EV_LOCAL_BUSY_CLEAR, 756 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 757 L2CAP_EV_RECV_FBIT, 758 L2CAP_EV_RETRANS_TO, 759 L2CAP_EV_MONITOR_TO, 760 L2CAP_EV_EXPLICIT_POLL, 761 L2CAP_EV_RECV_IFRAME, 762 L2CAP_EV_RECV_RR, 763 L2CAP_EV_RECV_REJ, 764 L2CAP_EV_RECV_RNR, 765 L2CAP_EV_RECV_SREJ, 766 L2CAP_EV_RECV_FRAME, 767}; 768 769enum { 770 L2CAP_MOVE_ROLE_NONE, 771 L2CAP_MOVE_ROLE_INITIATOR, 772 L2CAP_MOVE_ROLE_RESPONDER, 773}; 774 775enum { 776 L2CAP_MOVE_STABLE, 777 L2CAP_MOVE_WAIT_REQ, 778 L2CAP_MOVE_WAIT_RSP, 779 L2CAP_MOVE_WAIT_RSP_SUCCESS, 780 L2CAP_MOVE_WAIT_CONFIRM, 781 L2CAP_MOVE_WAIT_CONFIRM_RSP, 782 L2CAP_MOVE_WAIT_LOGICAL_COMP, 783 L2CAP_MOVE_WAIT_LOGICAL_CFM, 784 L2CAP_MOVE_WAIT_LOCAL_BUSY, 785 L2CAP_MOVE_WAIT_PREPARE, 786}; 787 788void l2cap_chan_hold(struct l2cap_chan *c); 789void l2cap_chan_put(struct l2cap_chan *c); 790 791static inline void l2cap_chan_lock(struct l2cap_chan *chan) 792{ 793 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 794} 795 796static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 797{ 798 mutex_unlock(&chan->lock); 799} 800 801static inline void l2cap_set_timer(struct l2cap_chan *chan, 802 struct delayed_work *work, long timeout) 803{ 804 BT_DBG("chan %p state %s timeout %ld", chan, 805 state_to_string(chan->state), timeout); 806 807 /* If delayed work cancelled do not hold(chan) 808 since it is already done with previous set_timer */ 809 if (!cancel_delayed_work(work)) 810 l2cap_chan_hold(chan); 811 812 schedule_delayed_work(work, timeout); 813} 814 815static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 816 struct delayed_work *work) 817{ 818 bool ret; 819 820 /* put(chan) if delayed work cancelled otherwise it 821 is done in delayed work function */ 822 ret = cancel_delayed_work(work); 823 if (ret) 824 l2cap_chan_put(chan); 825 826 return ret; 827} 828 829#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 830#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 831#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 832#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 833#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 834 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 835#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 836 837static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 838{ 839 if (seq1 >= seq2) 840 return seq1 - seq2; 841 else 842 return chan->tx_win_max + 1 - seq2 + seq1; 843} 844 845static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 846{ 847 return (seq + 1) % (chan->tx_win_max + 1); 848} 849 850static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 851{ 852 return NULL; 853} 854 855static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 856{ 857 return -ENOSYS; 858} 859 860static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 861 unsigned long hdr_len, 862 unsigned long len, int nb) 863{ 864 return ERR_PTR(-ENOSYS); 865} 866 867static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 868{ 869} 870 871static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 872{ 873} 874 875static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 876{ 877} 878 879static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 880 int state, int err) 881{ 882} 883 884static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 885{ 886} 887 888static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 889{ 890} 891 892static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 893{ 894} 895 896static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 897{ 898} 899 900static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 901{ 902 return 0; 903} 904 905extern bool disable_ertm; 906 907int l2cap_init_sockets(void); 908void l2cap_cleanup_sockets(void); 909bool l2cap_is_socket(struct socket *sock); 910 911void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 912void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 913 914int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 915int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 916 917struct l2cap_chan *l2cap_chan_create(void); 918void l2cap_chan_close(struct l2cap_chan *chan, int reason); 919int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 920 bdaddr_t *dst, u8 dst_type); 921int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); 922void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 923int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 924void l2cap_chan_set_defaults(struct l2cap_chan *chan); 925int l2cap_ertm_init(struct l2cap_chan *chan); 926void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 927void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 928void l2cap_chan_del(struct l2cap_chan *chan, int err); 929void l2cap_send_conn_req(struct l2cap_chan *chan); 930void l2cap_move_start(struct l2cap_chan *chan); 931void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 932 u8 status); 933void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 934 935struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 936void l2cap_conn_put(struct l2cap_conn *conn); 937 938int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 939void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 940 941#endif /* __L2CAP_H */ 942