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