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#define L2CAP_ECRED_CONN_SCID_MAX 5 51 52#define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100) 53#define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000) 54#define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000) 55#define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000) 56#define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000) 57#define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000) 58#define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000) 59#define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200) 60#define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000) 61 62#define L2CAP_A2MP_DEFAULT_MTU 670 63 64/* L2CAP socket address */ 65struct sockaddr_l2 { 66 sa_family_t l2_family; 67 __le16 l2_psm; 68 bdaddr_t l2_bdaddr; 69 __le16 l2_cid; 70 __u8 l2_bdaddr_type; 71}; 72 73/* L2CAP socket options */ 74#define L2CAP_OPTIONS 0x01 75struct l2cap_options { 76 __u16 omtu; 77 __u16 imtu; 78 __u16 flush_to; 79 __u8 mode; 80 __u8 fcs; 81 __u8 max_tx; 82 __u16 txwin_size; 83}; 84 85#define L2CAP_CONNINFO 0x02 86struct l2cap_conninfo { 87 __u16 hci_handle; 88 __u8 dev_class[3]; 89}; 90 91#define L2CAP_LM 0x03 92#define L2CAP_LM_MASTER 0x0001 93#define L2CAP_LM_AUTH 0x0002 94#define L2CAP_LM_ENCRYPT 0x0004 95#define L2CAP_LM_TRUSTED 0x0008 96#define L2CAP_LM_RELIABLE 0x0010 97#define L2CAP_LM_SECURE 0x0020 98#define L2CAP_LM_FIPS 0x0040 99 100/* L2CAP command codes */ 101#define L2CAP_COMMAND_REJ 0x01 102#define L2CAP_CONN_REQ 0x02 103#define L2CAP_CONN_RSP 0x03 104#define L2CAP_CONF_REQ 0x04 105#define L2CAP_CONF_RSP 0x05 106#define L2CAP_DISCONN_REQ 0x06 107#define L2CAP_DISCONN_RSP 0x07 108#define L2CAP_ECHO_REQ 0x08 109#define L2CAP_ECHO_RSP 0x09 110#define L2CAP_INFO_REQ 0x0a 111#define L2CAP_INFO_RSP 0x0b 112#define L2CAP_CREATE_CHAN_REQ 0x0c 113#define L2CAP_CREATE_CHAN_RSP 0x0d 114#define L2CAP_MOVE_CHAN_REQ 0x0e 115#define L2CAP_MOVE_CHAN_RSP 0x0f 116#define L2CAP_MOVE_CHAN_CFM 0x10 117#define L2CAP_MOVE_CHAN_CFM_RSP 0x11 118#define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 119#define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 120#define L2CAP_LE_CONN_REQ 0x14 121#define L2CAP_LE_CONN_RSP 0x15 122#define L2CAP_LE_CREDITS 0x16 123#define L2CAP_ECRED_CONN_REQ 0x17 124#define L2CAP_ECRED_CONN_RSP 0x18 125#define L2CAP_ECRED_RECONF_REQ 0x19 126#define L2CAP_ECRED_RECONF_RSP 0x1a 127 128/* L2CAP extended feature mask */ 129#define L2CAP_FEAT_FLOWCTL 0x00000001 130#define L2CAP_FEAT_RETRANS 0x00000002 131#define L2CAP_FEAT_BIDIR_QOS 0x00000004 132#define L2CAP_FEAT_ERTM 0x00000008 133#define L2CAP_FEAT_STREAMING 0x00000010 134#define L2CAP_FEAT_FCS 0x00000020 135#define L2CAP_FEAT_EXT_FLOW 0x00000040 136#define L2CAP_FEAT_FIXED_CHAN 0x00000080 137#define L2CAP_FEAT_EXT_WINDOW 0x00000100 138#define L2CAP_FEAT_UCD 0x00000200 139 140/* L2CAP checksum option */ 141#define L2CAP_FCS_NONE 0x00 142#define L2CAP_FCS_CRC16 0x01 143 144/* L2CAP fixed channels */ 145#define L2CAP_FC_SIG_BREDR 0x02 146#define L2CAP_FC_CONNLESS 0x04 147#define L2CAP_FC_A2MP 0x08 148#define L2CAP_FC_ATT 0x10 149#define L2CAP_FC_SIG_LE 0x20 150#define L2CAP_FC_SMP_LE 0x40 151#define L2CAP_FC_SMP_BREDR 0x80 152 153/* L2CAP Control Field bit masks */ 154#define L2CAP_CTRL_SAR 0xC000 155#define L2CAP_CTRL_REQSEQ 0x3F00 156#define L2CAP_CTRL_TXSEQ 0x007E 157#define L2CAP_CTRL_SUPERVISE 0x000C 158 159#define L2CAP_CTRL_RETRANS 0x0080 160#define L2CAP_CTRL_FINAL 0x0080 161#define L2CAP_CTRL_POLL 0x0010 162#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 163 164#define L2CAP_CTRL_TXSEQ_SHIFT 1 165#define L2CAP_CTRL_SUPER_SHIFT 2 166#define L2CAP_CTRL_POLL_SHIFT 4 167#define L2CAP_CTRL_FINAL_SHIFT 7 168#define L2CAP_CTRL_REQSEQ_SHIFT 8 169#define L2CAP_CTRL_SAR_SHIFT 14 170 171/* L2CAP Extended Control Field bit mask */ 172#define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 173#define L2CAP_EXT_CTRL_SAR 0x00030000 174#define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 175#define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 176 177#define L2CAP_EXT_CTRL_POLL 0x00040000 178#define L2CAP_EXT_CTRL_FINAL 0x00000002 179#define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 180 181#define L2CAP_EXT_CTRL_FINAL_SHIFT 1 182#define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 183#define L2CAP_EXT_CTRL_SAR_SHIFT 16 184#define L2CAP_EXT_CTRL_SUPER_SHIFT 16 185#define L2CAP_EXT_CTRL_POLL_SHIFT 18 186#define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 187 188/* L2CAP Supervisory Function */ 189#define L2CAP_SUPER_RR 0x00 190#define L2CAP_SUPER_REJ 0x01 191#define L2CAP_SUPER_RNR 0x02 192#define L2CAP_SUPER_SREJ 0x03 193 194/* L2CAP Segmentation and Reassembly */ 195#define L2CAP_SAR_UNSEGMENTED 0x00 196#define L2CAP_SAR_START 0x01 197#define L2CAP_SAR_END 0x02 198#define L2CAP_SAR_CONTINUE 0x03 199 200/* L2CAP Command rej. reasons */ 201#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 202#define L2CAP_REJ_MTU_EXCEEDED 0x0001 203#define L2CAP_REJ_INVALID_CID 0x0002 204 205/* L2CAP structures */ 206struct l2cap_hdr { 207 __le16 len; 208 __le16 cid; 209} __packed; 210#define L2CAP_HDR_SIZE 4 211#define L2CAP_ENH_HDR_SIZE 6 212#define L2CAP_EXT_HDR_SIZE 8 213 214#define L2CAP_FCS_SIZE 2 215#define L2CAP_SDULEN_SIZE 2 216#define L2CAP_PSMLEN_SIZE 2 217#define L2CAP_ENH_CTRL_SIZE 2 218#define L2CAP_EXT_CTRL_SIZE 4 219 220struct l2cap_cmd_hdr { 221 __u8 code; 222 __u8 ident; 223 __le16 len; 224} __packed; 225#define L2CAP_CMD_HDR_SIZE 4 226 227struct l2cap_cmd_rej_unk { 228 __le16 reason; 229} __packed; 230 231struct l2cap_cmd_rej_mtu { 232 __le16 reason; 233 __le16 max_mtu; 234} __packed; 235 236struct l2cap_cmd_rej_cid { 237 __le16 reason; 238 __le16 scid; 239 __le16 dcid; 240} __packed; 241 242struct l2cap_conn_req { 243 __le16 psm; 244 __le16 scid; 245} __packed; 246 247struct l2cap_conn_rsp { 248 __le16 dcid; 249 __le16 scid; 250 __le16 result; 251 __le16 status; 252} __packed; 253 254/* protocol/service multiplexer (PSM) */ 255#define L2CAP_PSM_SDP 0x0001 256#define L2CAP_PSM_RFCOMM 0x0003 257#define L2CAP_PSM_3DSP 0x0021 258#define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ 259 260#define L2CAP_PSM_DYN_START 0x1001 261#define L2CAP_PSM_DYN_END 0xffff 262#define L2CAP_PSM_AUTO_END 0x10ff 263#define L2CAP_PSM_LE_DYN_START 0x0080 264#define L2CAP_PSM_LE_DYN_END 0x00ff 265 266/* channel identifier */ 267#define L2CAP_CID_SIGNALING 0x0001 268#define L2CAP_CID_CONN_LESS 0x0002 269#define L2CAP_CID_A2MP 0x0003 270#define L2CAP_CID_ATT 0x0004 271#define L2CAP_CID_LE_SIGNALING 0x0005 272#define L2CAP_CID_SMP 0x0006 273#define L2CAP_CID_SMP_BREDR 0x0007 274#define L2CAP_CID_DYN_START 0x0040 275#define L2CAP_CID_DYN_END 0xffff 276#define L2CAP_CID_LE_DYN_END 0x007f 277 278/* connect/create channel results */ 279#define L2CAP_CR_SUCCESS 0x0000 280#define L2CAP_CR_PEND 0x0001 281#define L2CAP_CR_BAD_PSM 0x0002 282#define L2CAP_CR_SEC_BLOCK 0x0003 283#define L2CAP_CR_NO_MEM 0x0004 284#define L2CAP_CR_BAD_AMP 0x0005 285#define L2CAP_CR_INVALID_SCID 0x0006 286#define L2CAP_CR_SCID_IN_USE 0x0007 287 288/* credit based connect results */ 289#define L2CAP_CR_LE_SUCCESS 0x0000 290#define L2CAP_CR_LE_BAD_PSM 0x0002 291#define L2CAP_CR_LE_NO_MEM 0x0004 292#define L2CAP_CR_LE_AUTHENTICATION 0x0005 293#define L2CAP_CR_LE_AUTHORIZATION 0x0006 294#define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007 295#define L2CAP_CR_LE_ENCRYPTION 0x0008 296#define L2CAP_CR_LE_INVALID_SCID 0x0009 297#define L2CAP_CR_LE_SCID_IN_USE 0X000A 298#define L2CAP_CR_LE_UNACCEPT_PARAMS 0X000B 299#define L2CAP_CR_LE_INVALID_PARAMS 0X000C 300 301/* connect/create channel status */ 302#define L2CAP_CS_NO_INFO 0x0000 303#define L2CAP_CS_AUTHEN_PEND 0x0001 304#define L2CAP_CS_AUTHOR_PEND 0x0002 305 306struct l2cap_conf_req { 307 __le16 dcid; 308 __le16 flags; 309 __u8 data[]; 310} __packed; 311 312struct l2cap_conf_rsp { 313 __le16 scid; 314 __le16 flags; 315 __le16 result; 316 __u8 data[]; 317} __packed; 318 319#define L2CAP_CONF_SUCCESS 0x0000 320#define L2CAP_CONF_UNACCEPT 0x0001 321#define L2CAP_CONF_REJECT 0x0002 322#define L2CAP_CONF_UNKNOWN 0x0003 323#define L2CAP_CONF_PENDING 0x0004 324#define L2CAP_CONF_EFS_REJECT 0x0005 325 326/* configuration req/rsp continuation flag */ 327#define L2CAP_CONF_FLAG_CONTINUATION 0x0001 328 329struct l2cap_conf_opt { 330 __u8 type; 331 __u8 len; 332 __u8 val[]; 333} __packed; 334#define L2CAP_CONF_OPT_SIZE 2 335 336#define L2CAP_CONF_HINT 0x80 337#define L2CAP_CONF_MASK 0x7f 338 339#define L2CAP_CONF_MTU 0x01 340#define L2CAP_CONF_FLUSH_TO 0x02 341#define L2CAP_CONF_QOS 0x03 342#define L2CAP_CONF_RFC 0x04 343#define L2CAP_CONF_FCS 0x05 344#define L2CAP_CONF_EFS 0x06 345#define L2CAP_CONF_EWS 0x07 346 347#define L2CAP_CONF_MAX_SIZE 22 348 349struct l2cap_conf_rfc { 350 __u8 mode; 351 __u8 txwin_size; 352 __u8 max_transmit; 353 __le16 retrans_timeout; 354 __le16 monitor_timeout; 355 __le16 max_pdu_size; 356} __packed; 357 358#define L2CAP_MODE_BASIC 0x00 359#define L2CAP_MODE_RETRANS 0x01 360#define L2CAP_MODE_FLOWCTL 0x02 361#define L2CAP_MODE_ERTM 0x03 362#define L2CAP_MODE_STREAMING 0x04 363 364/* Unlike the above this one doesn't actually map to anything that would 365 * ever be sent over the air. Therefore, use a value that's unlikely to 366 * ever be used in the BR/EDR configuration phase. 367 */ 368#define L2CAP_MODE_LE_FLOWCTL 0x80 369#define L2CAP_MODE_EXT_FLOWCTL 0x81 370 371struct l2cap_conf_efs { 372 __u8 id; 373 __u8 stype; 374 __le16 msdu; 375 __le32 sdu_itime; 376 __le32 acc_lat; 377 __le32 flush_to; 378} __packed; 379 380#define L2CAP_SERV_NOTRAFIC 0x00 381#define L2CAP_SERV_BESTEFFORT 0x01 382#define L2CAP_SERV_GUARANTEED 0x02 383 384#define L2CAP_BESTEFFORT_ID 0x01 385 386struct l2cap_disconn_req { 387 __le16 dcid; 388 __le16 scid; 389} __packed; 390 391struct l2cap_disconn_rsp { 392 __le16 dcid; 393 __le16 scid; 394} __packed; 395 396struct l2cap_info_req { 397 __le16 type; 398} __packed; 399 400struct l2cap_info_rsp { 401 __le16 type; 402 __le16 result; 403 __u8 data[]; 404} __packed; 405 406struct l2cap_create_chan_req { 407 __le16 psm; 408 __le16 scid; 409 __u8 amp_id; 410} __packed; 411 412struct l2cap_create_chan_rsp { 413 __le16 dcid; 414 __le16 scid; 415 __le16 result; 416 __le16 status; 417} __packed; 418 419struct l2cap_move_chan_req { 420 __le16 icid; 421 __u8 dest_amp_id; 422} __packed; 423 424struct l2cap_move_chan_rsp { 425 __le16 icid; 426 __le16 result; 427} __packed; 428 429#define L2CAP_MR_SUCCESS 0x0000 430#define L2CAP_MR_PEND 0x0001 431#define L2CAP_MR_BAD_ID 0x0002 432#define L2CAP_MR_SAME_ID 0x0003 433#define L2CAP_MR_NOT_SUPP 0x0004 434#define L2CAP_MR_COLLISION 0x0005 435#define L2CAP_MR_NOT_ALLOWED 0x0006 436 437struct l2cap_move_chan_cfm { 438 __le16 icid; 439 __le16 result; 440} __packed; 441 442#define L2CAP_MC_CONFIRMED 0x0000 443#define L2CAP_MC_UNCONFIRMED 0x0001 444 445struct l2cap_move_chan_cfm_rsp { 446 __le16 icid; 447} __packed; 448 449/* info type */ 450#define L2CAP_IT_CL_MTU 0x0001 451#define L2CAP_IT_FEAT_MASK 0x0002 452#define L2CAP_IT_FIXED_CHAN 0x0003 453 454/* info result */ 455#define L2CAP_IR_SUCCESS 0x0000 456#define L2CAP_IR_NOTSUPP 0x0001 457 458struct l2cap_conn_param_update_req { 459 __le16 min; 460 __le16 max; 461 __le16 latency; 462 __le16 to_multiplier; 463} __packed; 464 465struct l2cap_conn_param_update_rsp { 466 __le16 result; 467} __packed; 468 469/* Connection Parameters result */ 470#define L2CAP_CONN_PARAM_ACCEPTED 0x0000 471#define L2CAP_CONN_PARAM_REJECTED 0x0001 472 473struct l2cap_le_conn_req { 474 __le16 psm; 475 __le16 scid; 476 __le16 mtu; 477 __le16 mps; 478 __le16 credits; 479} __packed; 480 481struct l2cap_le_conn_rsp { 482 __le16 dcid; 483 __le16 mtu; 484 __le16 mps; 485 __le16 credits; 486 __le16 result; 487} __packed; 488 489struct l2cap_le_credits { 490 __le16 cid; 491 __le16 credits; 492} __packed; 493 494#define L2CAP_ECRED_MIN_MTU 64 495#define L2CAP_ECRED_MIN_MPS 64 496#define L2CAP_ECRED_MAX_CID 5 497 498struct l2cap_ecred_conn_req { 499 __le16 psm; 500 __le16 mtu; 501 __le16 mps; 502 __le16 credits; 503 __le16 scid[]; 504} __packed; 505 506struct l2cap_ecred_conn_rsp { 507 __le16 mtu; 508 __le16 mps; 509 __le16 credits; 510 __le16 result; 511 __le16 dcid[]; 512}; 513 514struct l2cap_ecred_reconf_req { 515 __le16 mtu; 516 __le16 mps; 517 __le16 scid[]; 518} __packed; 519 520#define L2CAP_RECONF_SUCCESS 0x0000 521#define L2CAP_RECONF_INVALID_MTU 0x0001 522#define L2CAP_RECONF_INVALID_MPS 0x0002 523 524struct l2cap_ecred_reconf_rsp { 525 __le16 result; 526} __packed; 527 528/* ----- L2CAP channels and connections ----- */ 529struct l2cap_seq_list { 530 __u16 head; 531 __u16 tail; 532 __u16 mask; 533 __u16 *list; 534}; 535 536#define L2CAP_SEQ_LIST_CLEAR 0xFFFF 537#define L2CAP_SEQ_LIST_TAIL 0x8000 538 539struct l2cap_chan { 540 struct l2cap_conn *conn; 541 struct hci_conn *hs_hcon; 542 struct hci_chan *hs_hchan; 543 struct kref kref; 544 atomic_t nesting; 545 546 __u8 state; 547 548 bdaddr_t dst; 549 __u8 dst_type; 550 bdaddr_t src; 551 __u8 src_type; 552 __le16 psm; 553 __le16 sport; 554 __u16 dcid; 555 __u16 scid; 556 557 __u16 imtu; 558 __u16 omtu; 559 __u16 flush_to; 560 __u8 mode; 561 __u8 chan_type; 562 __u8 chan_policy; 563 564 __u8 sec_level; 565 566 __u8 ident; 567 568 __u8 conf_req[64]; 569 __u8 conf_len; 570 __u8 num_conf_req; 571 __u8 num_conf_rsp; 572 573 __u8 fcs; 574 575 __u16 tx_win; 576 __u16 tx_win_max; 577 __u16 ack_win; 578 __u8 max_tx; 579 __u16 retrans_timeout; 580 __u16 monitor_timeout; 581 __u16 mps; 582 583 __u16 tx_credits; 584 __u16 rx_credits; 585 586 __u8 tx_state; 587 __u8 rx_state; 588 589 unsigned long conf_state; 590 unsigned long conn_state; 591 unsigned long flags; 592 593 __u8 remote_amp_id; 594 __u8 local_amp_id; 595 __u8 move_id; 596 __u8 move_state; 597 __u8 move_role; 598 599 __u16 next_tx_seq; 600 __u16 expected_ack_seq; 601 __u16 expected_tx_seq; 602 __u16 buffer_seq; 603 __u16 srej_save_reqseq; 604 __u16 last_acked_seq; 605 __u16 frames_sent; 606 __u16 unacked_frames; 607 __u8 retry_count; 608 __u16 sdu_len; 609 struct sk_buff *sdu; 610 struct sk_buff *sdu_last_frag; 611 612 __u16 remote_tx_win; 613 __u8 remote_max_tx; 614 __u16 remote_mps; 615 616 __u8 local_id; 617 __u8 local_stype; 618 __u16 local_msdu; 619 __u32 local_sdu_itime; 620 __u32 local_acc_lat; 621 __u32 local_flush_to; 622 623 __u8 remote_id; 624 __u8 remote_stype; 625 __u16 remote_msdu; 626 __u32 remote_sdu_itime; 627 __u32 remote_acc_lat; 628 __u32 remote_flush_to; 629 630 struct delayed_work chan_timer; 631 struct delayed_work retrans_timer; 632 struct delayed_work monitor_timer; 633 struct delayed_work ack_timer; 634 635 struct sk_buff *tx_send_head; 636 struct sk_buff_head tx_q; 637 struct sk_buff_head srej_q; 638 struct l2cap_seq_list srej_list; 639 struct l2cap_seq_list retrans_list; 640 641 struct list_head list; 642 struct list_head global_l; 643 644 void *data; 645 const struct l2cap_ops *ops; 646 struct mutex lock; 647}; 648 649struct l2cap_ops { 650 char *name; 651 652 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); 653 int (*recv) (struct l2cap_chan * chan, 654 struct sk_buff *skb); 655 void (*teardown) (struct l2cap_chan *chan, int err); 656 void (*close) (struct l2cap_chan *chan); 657 void (*state_change) (struct l2cap_chan *chan, 658 int state, int err); 659 void (*ready) (struct l2cap_chan *chan); 660 void (*defer) (struct l2cap_chan *chan); 661 void (*resume) (struct l2cap_chan *chan); 662 void (*suspend) (struct l2cap_chan *chan); 663 void (*set_shutdown) (struct l2cap_chan *chan); 664 long (*get_sndtimeo) (struct l2cap_chan *chan); 665 struct pid *(*get_peer_pid) (struct l2cap_chan *chan); 666 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 667 unsigned long hdr_len, 668 unsigned long len, int nb); 669 int (*filter) (struct l2cap_chan * chan, 670 struct sk_buff *skb); 671}; 672 673struct l2cap_conn { 674 struct hci_conn *hcon; 675 struct hci_chan *hchan; 676 677 unsigned int mtu; 678 679 __u32 feat_mask; 680 __u8 remote_fixed_chan; 681 __u8 local_fixed_chan; 682 683 __u8 info_state; 684 __u8 info_ident; 685 686 struct delayed_work info_timer; 687 688 struct sk_buff *rx_skb; 689 __u32 rx_len; 690 __u8 tx_ident; 691 struct mutex ident_lock; 692 693 struct sk_buff_head pending_rx; 694 struct work_struct pending_rx_work; 695 696 struct work_struct id_addr_update_work; 697 698 __u8 disc_reason; 699 700 struct l2cap_chan *smp; 701 702 struct list_head chan_l; 703 struct mutex chan_lock; 704 struct kref ref; 705 struct list_head users; 706}; 707 708struct l2cap_user { 709 struct list_head list; 710 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); 711 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); 712}; 713 714#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 715#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 716#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 717 718#define L2CAP_CHAN_RAW 1 719#define L2CAP_CHAN_CONN_LESS 2 720#define L2CAP_CHAN_CONN_ORIENTED 3 721#define L2CAP_CHAN_FIXED 4 722 723/* ----- L2CAP socket info ----- */ 724#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 725 726struct l2cap_pinfo { 727 struct bt_sock bt; 728 struct l2cap_chan *chan; 729 struct sk_buff *rx_busy_skb; 730}; 731 732enum { 733 CONF_REQ_SENT, 734 CONF_INPUT_DONE, 735 CONF_OUTPUT_DONE, 736 CONF_MTU_DONE, 737 CONF_MODE_DONE, 738 CONF_CONNECT_PEND, 739 CONF_RECV_NO_FCS, 740 CONF_STATE2_DEVICE, 741 CONF_EWS_RECV, 742 CONF_LOC_CONF_PEND, 743 CONF_REM_CONF_PEND, 744 CONF_NOT_COMPLETE, 745}; 746 747#define L2CAP_CONF_MAX_CONF_REQ 2 748#define L2CAP_CONF_MAX_CONF_RSP 2 749 750enum { 751 CONN_SREJ_SENT, 752 CONN_WAIT_F, 753 CONN_SREJ_ACT, 754 CONN_SEND_PBIT, 755 CONN_REMOTE_BUSY, 756 CONN_LOCAL_BUSY, 757 CONN_REJ_ACT, 758 CONN_SEND_FBIT, 759 CONN_RNR_SENT, 760}; 761 762/* Definitions for flags in l2cap_chan */ 763enum { 764 FLAG_ROLE_SWITCH, 765 FLAG_FORCE_ACTIVE, 766 FLAG_FORCE_RELIABLE, 767 FLAG_FLUSHABLE, 768 FLAG_EXT_CTRL, 769 FLAG_EFS_ENABLE, 770 FLAG_DEFER_SETUP, 771 FLAG_LE_CONN_REQ_SENT, 772 FLAG_ECRED_CONN_REQ_SENT, 773 FLAG_PENDING_SECURITY, 774 FLAG_HOLD_HCI_CONN, 775}; 776 777/* Lock nesting levels for L2CAP channels. We need these because lockdep 778 * otherwise considers all channels equal and will e.g. complain about a 779 * connection oriented channel triggering SMP procedures or a listening 780 * channel creating and locking a child channel. 781 */ 782enum { 783 L2CAP_NESTING_SMP, 784 L2CAP_NESTING_NORMAL, 785 L2CAP_NESTING_PARENT, 786}; 787 788enum { 789 L2CAP_TX_STATE_XMIT, 790 L2CAP_TX_STATE_WAIT_F, 791}; 792 793enum { 794 L2CAP_RX_STATE_RECV, 795 L2CAP_RX_STATE_SREJ_SENT, 796 L2CAP_RX_STATE_MOVE, 797 L2CAP_RX_STATE_WAIT_P, 798 L2CAP_RX_STATE_WAIT_F, 799}; 800 801enum { 802 L2CAP_TXSEQ_EXPECTED, 803 L2CAP_TXSEQ_EXPECTED_SREJ, 804 L2CAP_TXSEQ_UNEXPECTED, 805 L2CAP_TXSEQ_UNEXPECTED_SREJ, 806 L2CAP_TXSEQ_DUPLICATE, 807 L2CAP_TXSEQ_DUPLICATE_SREJ, 808 L2CAP_TXSEQ_INVALID, 809 L2CAP_TXSEQ_INVALID_IGNORE, 810}; 811 812enum { 813 L2CAP_EV_DATA_REQUEST, 814 L2CAP_EV_LOCAL_BUSY_DETECTED, 815 L2CAP_EV_LOCAL_BUSY_CLEAR, 816 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 817 L2CAP_EV_RECV_FBIT, 818 L2CAP_EV_RETRANS_TO, 819 L2CAP_EV_MONITOR_TO, 820 L2CAP_EV_EXPLICIT_POLL, 821 L2CAP_EV_RECV_IFRAME, 822 L2CAP_EV_RECV_RR, 823 L2CAP_EV_RECV_REJ, 824 L2CAP_EV_RECV_RNR, 825 L2CAP_EV_RECV_SREJ, 826 L2CAP_EV_RECV_FRAME, 827}; 828 829enum { 830 L2CAP_MOVE_ROLE_NONE, 831 L2CAP_MOVE_ROLE_INITIATOR, 832 L2CAP_MOVE_ROLE_RESPONDER, 833}; 834 835enum { 836 L2CAP_MOVE_STABLE, 837 L2CAP_MOVE_WAIT_REQ, 838 L2CAP_MOVE_WAIT_RSP, 839 L2CAP_MOVE_WAIT_RSP_SUCCESS, 840 L2CAP_MOVE_WAIT_CONFIRM, 841 L2CAP_MOVE_WAIT_CONFIRM_RSP, 842 L2CAP_MOVE_WAIT_LOGICAL_COMP, 843 L2CAP_MOVE_WAIT_LOGICAL_CFM, 844 L2CAP_MOVE_WAIT_LOCAL_BUSY, 845 L2CAP_MOVE_WAIT_PREPARE, 846}; 847 848void l2cap_chan_hold(struct l2cap_chan *c); 849struct l2cap_chan *l2cap_chan_hold_unless_zero(struct l2cap_chan *c); 850void l2cap_chan_put(struct l2cap_chan *c); 851 852static inline void l2cap_chan_lock(struct l2cap_chan *chan) 853{ 854 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); 855} 856 857static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 858{ 859 mutex_unlock(&chan->lock); 860} 861 862static inline void l2cap_set_timer(struct l2cap_chan *chan, 863 struct delayed_work *work, long timeout) 864{ 865 BT_DBG("chan %p state %s timeout %ld", chan, 866 state_to_string(chan->state), timeout); 867 868 /* If delayed work cancelled do not hold(chan) 869 since it is already done with previous set_timer */ 870 if (!cancel_delayed_work(work)) 871 l2cap_chan_hold(chan); 872 873 schedule_delayed_work(work, timeout); 874} 875 876static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 877 struct delayed_work *work) 878{ 879 bool ret; 880 881 /* put(chan) if delayed work cancelled otherwise it 882 is done in delayed work function */ 883 ret = cancel_delayed_work(work); 884 if (ret) 885 l2cap_chan_put(chan); 886 887 return ret; 888} 889 890#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 891#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 892#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 893#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 894#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 895 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 896#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 897 898static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 899{ 900 if (seq1 >= seq2) 901 return seq1 - seq2; 902 else 903 return chan->tx_win_max + 1 - seq2 + seq1; 904} 905 906static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 907{ 908 return (seq + 1) % (chan->tx_win_max + 1); 909} 910 911static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) 912{ 913 return NULL; 914} 915 916static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) 917{ 918 return -ENOSYS; 919} 920 921static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, 922 unsigned long hdr_len, 923 unsigned long len, int nb) 924{ 925 return ERR_PTR(-ENOSYS); 926} 927 928static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) 929{ 930} 931 932static inline void l2cap_chan_no_close(struct l2cap_chan *chan) 933{ 934} 935 936static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) 937{ 938} 939 940static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, 941 int state, int err) 942{ 943} 944 945static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) 946{ 947} 948 949static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) 950{ 951} 952 953static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) 954{ 955} 956 957static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) 958{ 959} 960 961static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) 962{ 963 return 0; 964} 965 966extern bool disable_ertm; 967extern bool enable_ecred; 968 969int l2cap_init_sockets(void); 970void l2cap_cleanup_sockets(void); 971bool l2cap_is_socket(struct socket *sock); 972 973void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); 974void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan); 975void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 976 977int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 978int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 979 980struct l2cap_chan *l2cap_chan_create(void); 981void l2cap_chan_close(struct l2cap_chan *chan, int reason); 982int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 983 bdaddr_t *dst, u8 dst_type); 984int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu); 985int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); 986void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 987int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); 988void l2cap_chan_set_defaults(struct l2cap_chan *chan); 989int l2cap_ertm_init(struct l2cap_chan *chan); 990void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 991void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); 992typedef void (*l2cap_chan_func_t)(struct l2cap_chan *chan, void *data); 993void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func, 994 void *data); 995void l2cap_chan_del(struct l2cap_chan *chan, int err); 996void l2cap_send_conn_req(struct l2cap_chan *chan); 997void l2cap_move_start(struct l2cap_chan *chan); 998void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 999 u8 status); 1000void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); 1001 1002struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); 1003void l2cap_conn_put(struct l2cap_conn *conn); 1004 1005int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); 1006void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); 1007 1008#endif /* __L2CAP_H */ 1009