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_DEFAULT_TX_WINDOW 63 37 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF 38 #define L2CAP_DEFAULT_MAX_TX 3 39 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */ 40 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ 41 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */ 42 #define L2CAP_DEFAULT_ACK_TO 200 43 #define L2CAP_LE_DEFAULT_MTU 23 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 49 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100) 50 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000) 51 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000) 52 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000) 53 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000) 54 55 /* L2CAP socket address */ 56 struct sockaddr_l2 { 57 sa_family_t l2_family; 58 __le16 l2_psm; 59 bdaddr_t l2_bdaddr; 60 __le16 l2_cid; 61 __u8 l2_bdaddr_type; 62 }; 63 64 /* L2CAP socket options */ 65 #define L2CAP_OPTIONS 0x01 66 struct l2cap_options { 67 __u16 omtu; 68 __u16 imtu; 69 __u16 flush_to; 70 __u8 mode; 71 __u8 fcs; 72 __u8 max_tx; 73 __u16 txwin_size; 74 }; 75 76 #define L2CAP_CONNINFO 0x02 77 struct l2cap_conninfo { 78 __u16 hci_handle; 79 __u8 dev_class[3]; 80 }; 81 82 #define L2CAP_LM 0x03 83 #define L2CAP_LM_MASTER 0x0001 84 #define L2CAP_LM_AUTH 0x0002 85 #define L2CAP_LM_ENCRYPT 0x0004 86 #define L2CAP_LM_TRUSTED 0x0008 87 #define L2CAP_LM_RELIABLE 0x0010 88 #define L2CAP_LM_SECURE 0x0020 89 90 /* L2CAP command codes */ 91 #define L2CAP_COMMAND_REJ 0x01 92 #define L2CAP_CONN_REQ 0x02 93 #define L2CAP_CONN_RSP 0x03 94 #define L2CAP_CONF_REQ 0x04 95 #define L2CAP_CONF_RSP 0x05 96 #define L2CAP_DISCONN_REQ 0x06 97 #define L2CAP_DISCONN_RSP 0x07 98 #define L2CAP_ECHO_REQ 0x08 99 #define L2CAP_ECHO_RSP 0x09 100 #define L2CAP_INFO_REQ 0x0a 101 #define L2CAP_INFO_RSP 0x0b 102 #define L2CAP_CREATE_CHAN_REQ 0x0c 103 #define L2CAP_CREATE_CHAN_RSP 0x0d 104 #define L2CAP_MOVE_CHAN_REQ 0x0e 105 #define L2CAP_MOVE_CHAN_RSP 0x0f 106 #define L2CAP_MOVE_CHAN_CFM 0x10 107 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 108 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 109 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 110 111 /* L2CAP extended feature mask */ 112 #define L2CAP_FEAT_FLOWCTL 0x00000001 113 #define L2CAP_FEAT_RETRANS 0x00000002 114 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 115 #define L2CAP_FEAT_ERTM 0x00000008 116 #define L2CAP_FEAT_STREAMING 0x00000010 117 #define L2CAP_FEAT_FCS 0x00000020 118 #define L2CAP_FEAT_EXT_FLOW 0x00000040 119 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 120 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 121 #define L2CAP_FEAT_UCD 0x00000200 122 123 /* L2CAP checksum option */ 124 #define L2CAP_FCS_NONE 0x00 125 #define L2CAP_FCS_CRC16 0x01 126 127 /* L2CAP fixed channels */ 128 #define L2CAP_FC_L2CAP 0x02 129 #define L2CAP_FC_A2MP 0x08 130 131 /* L2CAP Control Field bit masks */ 132 #define L2CAP_CTRL_SAR 0xC000 133 #define L2CAP_CTRL_REQSEQ 0x3F00 134 #define L2CAP_CTRL_TXSEQ 0x007E 135 #define L2CAP_CTRL_SUPERVISE 0x000C 136 137 #define L2CAP_CTRL_RETRANS 0x0080 138 #define L2CAP_CTRL_FINAL 0x0080 139 #define L2CAP_CTRL_POLL 0x0010 140 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 141 142 #define L2CAP_CTRL_TXSEQ_SHIFT 1 143 #define L2CAP_CTRL_SUPER_SHIFT 2 144 #define L2CAP_CTRL_POLL_SHIFT 4 145 #define L2CAP_CTRL_FINAL_SHIFT 7 146 #define L2CAP_CTRL_REQSEQ_SHIFT 8 147 #define L2CAP_CTRL_SAR_SHIFT 14 148 149 /* L2CAP Extended Control Field bit mask */ 150 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 151 #define L2CAP_EXT_CTRL_SAR 0x00030000 152 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 153 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC 154 155 #define L2CAP_EXT_CTRL_POLL 0x00040000 156 #define L2CAP_EXT_CTRL_FINAL 0x00000002 157 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ 158 159 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 160 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 161 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 162 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 163 #define L2CAP_EXT_CTRL_POLL_SHIFT 18 164 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 165 166 /* L2CAP Supervisory Function */ 167 #define L2CAP_SUPER_RR 0x00 168 #define L2CAP_SUPER_REJ 0x01 169 #define L2CAP_SUPER_RNR 0x02 170 #define L2CAP_SUPER_SREJ 0x03 171 172 /* L2CAP Segmentation and Reassembly */ 173 #define L2CAP_SAR_UNSEGMENTED 0x00 174 #define L2CAP_SAR_START 0x01 175 #define L2CAP_SAR_END 0x02 176 #define L2CAP_SAR_CONTINUE 0x03 177 178 /* L2CAP Command rej. reasons */ 179 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 180 #define L2CAP_REJ_MTU_EXCEEDED 0x0001 181 #define L2CAP_REJ_INVALID_CID 0x0002 182 183 /* L2CAP structures */ 184 struct l2cap_hdr { 185 __le16 len; 186 __le16 cid; 187 } __packed; 188 #define L2CAP_HDR_SIZE 4 189 #define L2CAP_ENH_HDR_SIZE 6 190 #define L2CAP_EXT_HDR_SIZE 8 191 192 #define L2CAP_FCS_SIZE 2 193 #define L2CAP_SDULEN_SIZE 2 194 #define L2CAP_PSMLEN_SIZE 2 195 #define L2CAP_ENH_CTRL_SIZE 2 196 #define L2CAP_EXT_CTRL_SIZE 4 197 198 struct l2cap_cmd_hdr { 199 __u8 code; 200 __u8 ident; 201 __le16 len; 202 } __packed; 203 #define L2CAP_CMD_HDR_SIZE 4 204 205 struct l2cap_cmd_rej_unk { 206 __le16 reason; 207 } __packed; 208 209 struct l2cap_cmd_rej_mtu { 210 __le16 reason; 211 __le16 max_mtu; 212 } __packed; 213 214 struct l2cap_cmd_rej_cid { 215 __le16 reason; 216 __le16 scid; 217 __le16 dcid; 218 } __packed; 219 220 struct l2cap_conn_req { 221 __le16 psm; 222 __le16 scid; 223 } __packed; 224 225 struct l2cap_conn_rsp { 226 __le16 dcid; 227 __le16 scid; 228 __le16 result; 229 __le16 status; 230 } __packed; 231 232 /* channel indentifier */ 233 #define L2CAP_CID_SIGNALING 0x0001 234 #define L2CAP_CID_CONN_LESS 0x0002 235 #define L2CAP_CID_LE_DATA 0x0004 236 #define L2CAP_CID_LE_SIGNALING 0x0005 237 #define L2CAP_CID_SMP 0x0006 238 #define L2CAP_CID_DYN_START 0x0040 239 #define L2CAP_CID_DYN_END 0xffff 240 241 /* connect/create channel results */ 242 #define L2CAP_CR_SUCCESS 0x0000 243 #define L2CAP_CR_PEND 0x0001 244 #define L2CAP_CR_BAD_PSM 0x0002 245 #define L2CAP_CR_SEC_BLOCK 0x0003 246 #define L2CAP_CR_NO_MEM 0x0004 247 #define L2CAP_CR_BAD_AMP 0x0005 248 249 /* connect/create channel status */ 250 #define L2CAP_CS_NO_INFO 0x0000 251 #define L2CAP_CS_AUTHEN_PEND 0x0001 252 #define L2CAP_CS_AUTHOR_PEND 0x0002 253 254 struct l2cap_conf_req { 255 __le16 dcid; 256 __le16 flags; 257 __u8 data[0]; 258 } __packed; 259 260 struct l2cap_conf_rsp { 261 __le16 scid; 262 __le16 flags; 263 __le16 result; 264 __u8 data[0]; 265 } __packed; 266 267 #define L2CAP_CONF_SUCCESS 0x0000 268 #define L2CAP_CONF_UNACCEPT 0x0001 269 #define L2CAP_CONF_REJECT 0x0002 270 #define L2CAP_CONF_UNKNOWN 0x0003 271 #define L2CAP_CONF_PENDING 0x0004 272 #define L2CAP_CONF_EFS_REJECT 0x0005 273 274 struct l2cap_conf_opt { 275 __u8 type; 276 __u8 len; 277 __u8 val[0]; 278 } __packed; 279 #define L2CAP_CONF_OPT_SIZE 2 280 281 #define L2CAP_CONF_HINT 0x80 282 #define L2CAP_CONF_MASK 0x7f 283 284 #define L2CAP_CONF_MTU 0x01 285 #define L2CAP_CONF_FLUSH_TO 0x02 286 #define L2CAP_CONF_QOS 0x03 287 #define L2CAP_CONF_RFC 0x04 288 #define L2CAP_CONF_FCS 0x05 289 #define L2CAP_CONF_EFS 0x06 290 #define L2CAP_CONF_EWS 0x07 291 292 #define L2CAP_CONF_MAX_SIZE 22 293 294 struct l2cap_conf_rfc { 295 __u8 mode; 296 __u8 txwin_size; 297 __u8 max_transmit; 298 __le16 retrans_timeout; 299 __le16 monitor_timeout; 300 __le16 max_pdu_size; 301 } __packed; 302 303 #define L2CAP_MODE_BASIC 0x00 304 #define L2CAP_MODE_RETRANS 0x01 305 #define L2CAP_MODE_FLOWCTL 0x02 306 #define L2CAP_MODE_ERTM 0x03 307 #define L2CAP_MODE_STREAMING 0x04 308 309 struct l2cap_conf_efs { 310 __u8 id; 311 __u8 stype; 312 __le16 msdu; 313 __le32 sdu_itime; 314 __le32 acc_lat; 315 __le32 flush_to; 316 } __packed; 317 318 #define L2CAP_SERV_NOTRAFIC 0x00 319 #define L2CAP_SERV_BESTEFFORT 0x01 320 #define L2CAP_SERV_GUARANTEED 0x02 321 322 #define L2CAP_BESTEFFORT_ID 0x01 323 324 struct l2cap_disconn_req { 325 __le16 dcid; 326 __le16 scid; 327 } __packed; 328 329 struct l2cap_disconn_rsp { 330 __le16 dcid; 331 __le16 scid; 332 } __packed; 333 334 struct l2cap_info_req { 335 __le16 type; 336 } __packed; 337 338 struct l2cap_info_rsp { 339 __le16 type; 340 __le16 result; 341 __u8 data[0]; 342 } __packed; 343 344 struct l2cap_create_chan_req { 345 __le16 psm; 346 __le16 scid; 347 __u8 amp_id; 348 } __packed; 349 350 struct l2cap_create_chan_rsp { 351 __le16 dcid; 352 __le16 scid; 353 __le16 result; 354 __le16 status; 355 } __packed; 356 357 struct l2cap_move_chan_req { 358 __le16 icid; 359 __u8 dest_amp_id; 360 } __packed; 361 362 struct l2cap_move_chan_rsp { 363 __le16 icid; 364 __le16 result; 365 } __packed; 366 367 #define L2CAP_MR_SUCCESS 0x0000 368 #define L2CAP_MR_PEND 0x0001 369 #define L2CAP_MR_BAD_ID 0x0002 370 #define L2CAP_MR_SAME_ID 0x0003 371 #define L2CAP_MR_NOT_SUPP 0x0004 372 #define L2CAP_MR_COLLISION 0x0005 373 #define L2CAP_MR_NOT_ALLOWED 0x0006 374 375 struct l2cap_move_chan_cfm { 376 __le16 icid; 377 __le16 result; 378 } __packed; 379 380 #define L2CAP_MC_CONFIRMED 0x0000 381 #define L2CAP_MC_UNCONFIRMED 0x0001 382 383 struct l2cap_move_chan_cfm_rsp { 384 __le16 icid; 385 } __packed; 386 387 /* info type */ 388 #define L2CAP_IT_CL_MTU 0x0001 389 #define L2CAP_IT_FEAT_MASK 0x0002 390 #define L2CAP_IT_FIXED_CHAN 0x0003 391 392 /* info result */ 393 #define L2CAP_IR_SUCCESS 0x0000 394 #define L2CAP_IR_NOTSUPP 0x0001 395 396 struct l2cap_conn_param_update_req { 397 __le16 min; 398 __le16 max; 399 __le16 latency; 400 __le16 to_multiplier; 401 } __packed; 402 403 struct l2cap_conn_param_update_rsp { 404 __le16 result; 405 } __packed; 406 407 /* Connection Parameters result */ 408 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 409 #define L2CAP_CONN_PARAM_REJECTED 0x0001 410 411 /* ----- L2CAP channels and connections ----- */ 412 struct l2cap_seq_list { 413 __u16 head; 414 __u16 tail; 415 __u16 mask; 416 __u16 *list; 417 }; 418 419 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF 420 #define L2CAP_SEQ_LIST_TAIL 0x8000 421 422 struct srej_list { 423 __u16 tx_seq; 424 struct list_head list; 425 }; 426 427 struct l2cap_chan { 428 struct sock *sk; 429 430 struct l2cap_conn *conn; 431 432 __u8 state; 433 434 atomic_t refcnt; 435 436 __le16 psm; 437 __u16 dcid; 438 __u16 scid; 439 440 __u16 imtu; 441 __u16 omtu; 442 __u16 flush_to; 443 __u8 mode; 444 __u8 chan_type; 445 __u8 chan_policy; 446 447 __le16 sport; 448 449 __u8 sec_level; 450 451 __u8 ident; 452 453 __u8 conf_req[64]; 454 __u8 conf_len; 455 __u8 num_conf_req; 456 __u8 num_conf_rsp; 457 458 __u8 fcs; 459 460 __u16 tx_win; 461 __u16 tx_win_max; 462 __u8 max_tx; 463 __u16 retrans_timeout; 464 __u16 monitor_timeout; 465 __u16 mps; 466 467 __u8 tx_state; 468 __u8 rx_state; 469 470 unsigned long conf_state; 471 unsigned long conn_state; 472 unsigned long flags; 473 474 __u16 next_tx_seq; 475 __u16 expected_ack_seq; 476 __u16 expected_tx_seq; 477 __u16 buffer_seq; 478 __u16 buffer_seq_srej; 479 __u16 srej_save_reqseq; 480 __u16 last_acked_seq; 481 __u16 frames_sent; 482 __u16 unacked_frames; 483 __u8 retry_count; 484 __u16 srej_queue_next; 485 __u8 num_acked; 486 __u16 sdu_len; 487 struct sk_buff *sdu; 488 struct sk_buff *sdu_last_frag; 489 490 __u16 remote_tx_win; 491 __u8 remote_max_tx; 492 __u16 remote_mps; 493 494 __u8 local_id; 495 __u8 local_stype; 496 __u16 local_msdu; 497 __u32 local_sdu_itime; 498 __u32 local_acc_lat; 499 __u32 local_flush_to; 500 501 __u8 remote_id; 502 __u8 remote_stype; 503 __u16 remote_msdu; 504 __u32 remote_sdu_itime; 505 __u32 remote_acc_lat; 506 __u32 remote_flush_to; 507 508 struct delayed_work chan_timer; 509 struct delayed_work retrans_timer; 510 struct delayed_work monitor_timer; 511 struct delayed_work ack_timer; 512 513 struct sk_buff *tx_send_head; 514 struct sk_buff_head tx_q; 515 struct sk_buff_head srej_q; 516 struct l2cap_seq_list srej_list; 517 struct l2cap_seq_list retrans_list; 518 struct list_head srej_l; 519 520 struct list_head list; 521 struct list_head global_l; 522 523 void *data; 524 struct l2cap_ops *ops; 525 struct mutex lock; 526 }; 527 528 struct l2cap_ops { 529 char *name; 530 531 struct l2cap_chan *(*new_connection) (void *data); 532 int (*recv) (void *data, struct sk_buff *skb); 533 void (*close) (void *data); 534 void (*state_change) (void *data, int state); 535 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, 536 unsigned long len, int nb); 537 }; 538 539 struct l2cap_conn { 540 struct hci_conn *hcon; 541 struct hci_chan *hchan; 542 543 bdaddr_t *dst; 544 bdaddr_t *src; 545 546 unsigned int mtu; 547 548 __u32 feat_mask; 549 __u8 fixed_chan_mask; 550 551 __u8 info_state; 552 __u8 info_ident; 553 554 struct delayed_work info_timer; 555 556 spinlock_t lock; 557 558 struct sk_buff *rx_skb; 559 __u32 rx_len; 560 __u8 tx_ident; 561 562 __u8 disc_reason; 563 564 struct delayed_work security_timer; 565 struct smp_chan *smp_chan; 566 567 struct list_head chan_l; 568 struct mutex chan_lock; 569 }; 570 571 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 572 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 573 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 574 575 #define L2CAP_CHAN_RAW 1 576 #define L2CAP_CHAN_CONN_LESS 2 577 #define L2CAP_CHAN_CONN_ORIENTED 3 578 579 /* ----- L2CAP socket info ----- */ 580 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 581 582 struct l2cap_pinfo { 583 struct bt_sock bt; 584 struct l2cap_chan *chan; 585 struct sk_buff *rx_busy_skb; 586 }; 587 588 enum { 589 CONF_REQ_SENT, 590 CONF_INPUT_DONE, 591 CONF_OUTPUT_DONE, 592 CONF_MTU_DONE, 593 CONF_MODE_DONE, 594 CONF_CONNECT_PEND, 595 CONF_NO_FCS_RECV, 596 CONF_STATE2_DEVICE, 597 CONF_EWS_RECV, 598 CONF_LOC_CONF_PEND, 599 CONF_REM_CONF_PEND, 600 CONF_NOT_COMPLETE, 601 }; 602 603 #define L2CAP_CONF_MAX_CONF_REQ 2 604 #define L2CAP_CONF_MAX_CONF_RSP 2 605 606 enum { 607 CONN_SREJ_SENT, 608 CONN_WAIT_F, 609 CONN_SREJ_ACT, 610 CONN_SEND_PBIT, 611 CONN_REMOTE_BUSY, 612 CONN_LOCAL_BUSY, 613 CONN_REJ_ACT, 614 CONN_SEND_FBIT, 615 CONN_RNR_SENT, 616 }; 617 618 /* Definitions for flags in l2cap_chan */ 619 enum { 620 FLAG_ROLE_SWITCH, 621 FLAG_FORCE_ACTIVE, 622 FLAG_FORCE_RELIABLE, 623 FLAG_FLUSHABLE, 624 FLAG_EXT_CTRL, 625 FLAG_EFS_ENABLE, 626 }; 627 628 enum { 629 L2CAP_TX_STATE_XMIT, 630 L2CAP_TX_STATE_WAIT_F, 631 }; 632 633 enum { 634 L2CAP_RX_STATE_RECV, 635 L2CAP_RX_STATE_SREJ_SENT, 636 }; 637 638 enum { 639 L2CAP_TXSEQ_EXPECTED, 640 L2CAP_TXSEQ_EXPECTED_SREJ, 641 L2CAP_TXSEQ_UNEXPECTED, 642 L2CAP_TXSEQ_UNEXPECTED_SREJ, 643 L2CAP_TXSEQ_DUPLICATE, 644 L2CAP_TXSEQ_DUPLICATE_SREJ, 645 L2CAP_TXSEQ_INVALID, 646 L2CAP_TXSEQ_INVALID_IGNORE, 647 }; 648 649 enum { 650 L2CAP_EV_DATA_REQUEST, 651 L2CAP_EV_LOCAL_BUSY_DETECTED, 652 L2CAP_EV_LOCAL_BUSY_CLEAR, 653 L2CAP_EV_RECV_REQSEQ_AND_FBIT, 654 L2CAP_EV_RECV_FBIT, 655 L2CAP_EV_RETRANS_TO, 656 L2CAP_EV_MONITOR_TO, 657 L2CAP_EV_EXPLICIT_POLL, 658 L2CAP_EV_RECV_IFRAME, 659 L2CAP_EV_RECV_RR, 660 L2CAP_EV_RECV_REJ, 661 L2CAP_EV_RECV_RNR, 662 L2CAP_EV_RECV_SREJ, 663 L2CAP_EV_RECV_FRAME, 664 }; 665 666 static inline void l2cap_chan_hold(struct l2cap_chan *c) 667 { 668 atomic_inc(&c->refcnt); 669 } 670 671 static inline void l2cap_chan_put(struct l2cap_chan *c) 672 { 673 if (atomic_dec_and_test(&c->refcnt)) 674 kfree(c); 675 } 676 677 static inline void l2cap_chan_lock(struct l2cap_chan *chan) 678 { 679 mutex_lock(&chan->lock); 680 } 681 682 static inline void l2cap_chan_unlock(struct l2cap_chan *chan) 683 { 684 mutex_unlock(&chan->lock); 685 } 686 687 static inline void l2cap_set_timer(struct l2cap_chan *chan, 688 struct delayed_work *work, long timeout) 689 { 690 BT_DBG("chan %p state %s timeout %ld", chan, 691 state_to_string(chan->state), timeout); 692 693 /* If delayed work cancelled do not hold(chan) 694 since it is already done with previous set_timer */ 695 if (!cancel_delayed_work(work)) 696 l2cap_chan_hold(chan); 697 698 schedule_delayed_work(work, timeout); 699 } 700 701 static inline bool l2cap_clear_timer(struct l2cap_chan *chan, 702 struct delayed_work *work) 703 { 704 bool ret; 705 706 /* put(chan) if delayed work cancelled otherwise it 707 is done in delayed work function */ 708 ret = cancel_delayed_work(work); 709 if (ret) 710 l2cap_chan_put(chan); 711 712 return ret; 713 } 714 715 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) 716 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) 717 #define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \ 718 msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO)); 719 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) 720 #define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \ 721 msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO)); 722 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) 723 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ 724 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 725 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) 726 727 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) 728 { 729 if (seq1 >= seq2) 730 return seq1 - seq2; 731 else 732 return chan->tx_win_max + 1 - seq2 + seq1; 733 } 734 735 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) 736 { 737 return (seq + 1) % (chan->tx_win_max + 1); 738 } 739 740 static inline int l2cap_tx_window_full(struct l2cap_chan *ch) 741 { 742 int sub; 743 744 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64; 745 746 if (sub < 0) 747 sub += 64; 748 749 return sub == ch->remote_tx_win; 750 } 751 752 static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl) 753 { 754 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 755 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >> 756 L2CAP_EXT_CTRL_REQSEQ_SHIFT; 757 else 758 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT; 759 } 760 761 static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq) 762 { 763 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 764 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) & 765 L2CAP_EXT_CTRL_REQSEQ; 766 else 767 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ; 768 } 769 770 static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl) 771 { 772 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 773 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >> 774 L2CAP_EXT_CTRL_TXSEQ_SHIFT; 775 else 776 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT; 777 } 778 779 static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq) 780 { 781 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 782 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) & 783 L2CAP_EXT_CTRL_TXSEQ; 784 else 785 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ; 786 } 787 788 static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl) 789 { 790 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 791 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE; 792 else 793 return ctrl & L2CAP_CTRL_FRAME_TYPE; 794 } 795 796 static inline __u32 __set_sframe(struct l2cap_chan *chan) 797 { 798 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 799 return L2CAP_EXT_CTRL_FRAME_TYPE; 800 else 801 return L2CAP_CTRL_FRAME_TYPE; 802 } 803 804 static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl) 805 { 806 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 807 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT; 808 else 809 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT; 810 } 811 812 static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar) 813 { 814 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 815 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR; 816 else 817 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR; 818 } 819 820 static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl) 821 { 822 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START; 823 } 824 825 static inline __u32 __get_sar_mask(struct l2cap_chan *chan) 826 { 827 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 828 return L2CAP_EXT_CTRL_SAR; 829 else 830 return L2CAP_CTRL_SAR; 831 } 832 833 static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl) 834 { 835 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 836 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >> 837 L2CAP_EXT_CTRL_SUPER_SHIFT; 838 else 839 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT; 840 } 841 842 static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super) 843 { 844 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 845 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) & 846 L2CAP_EXT_CTRL_SUPERVISE; 847 else 848 return (super << L2CAP_CTRL_SUPER_SHIFT) & 849 L2CAP_CTRL_SUPERVISE; 850 } 851 852 static inline __u32 __set_ctrl_final(struct l2cap_chan *chan) 853 { 854 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 855 return L2CAP_EXT_CTRL_FINAL; 856 else 857 return L2CAP_CTRL_FINAL; 858 } 859 860 static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl) 861 { 862 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 863 return ctrl & L2CAP_EXT_CTRL_FINAL; 864 else 865 return ctrl & L2CAP_CTRL_FINAL; 866 } 867 868 static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan) 869 { 870 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 871 return L2CAP_EXT_CTRL_POLL; 872 else 873 return L2CAP_CTRL_POLL; 874 } 875 876 static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl) 877 { 878 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 879 return ctrl & L2CAP_EXT_CTRL_POLL; 880 else 881 return ctrl & L2CAP_CTRL_POLL; 882 } 883 884 static inline __u32 __get_control(struct l2cap_chan *chan, void *p) 885 { 886 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 887 return get_unaligned_le32(p); 888 else 889 return get_unaligned_le16(p); 890 } 891 892 static inline void __put_control(struct l2cap_chan *chan, __u32 control, 893 void *p) 894 { 895 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 896 return put_unaligned_le32(control, p); 897 else 898 return put_unaligned_le16(control, p); 899 } 900 901 static inline __u8 __ctrl_size(struct l2cap_chan *chan) 902 { 903 if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 904 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE; 905 else 906 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE; 907 } 908 909 extern bool disable_ertm; 910 911 int l2cap_init_sockets(void); 912 void l2cap_cleanup_sockets(void); 913 914 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); 915 int __l2cap_wait_ack(struct sock *sk); 916 917 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); 918 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); 919 920 struct l2cap_chan *l2cap_chan_create(void); 921 void l2cap_chan_close(struct l2cap_chan *chan, int reason); 922 void l2cap_chan_destroy(struct l2cap_chan *chan); 923 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 924 bdaddr_t *dst, u8 dst_type); 925 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 926 u32 priority); 927 void l2cap_chan_busy(struct l2cap_chan *chan, int busy); 928 int l2cap_chan_check_security(struct l2cap_chan *chan); 929 void l2cap_chan_set_defaults(struct l2cap_chan *chan); 930 931 #endif /* __L2CAP_H */ 932